+++ /dev/null
-/***************************************************************************/
-/* */
-/* ttinterp.c */
-/* */
-/* TrueType bytecode interpreter (body). */
-/* */
-/* Copyright 1996-2016 by */
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */
-/* */
-/* This file is part of the FreeType project, and may only be used, */
-/* modified, and distributed under the terms of the FreeType project */
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/***************************************************************************/
-
-
-/* Greg Hitchcock from Microsoft has helped a lot in resolving unclear */
-/* issues; many thanks! */
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_DEBUG_H
-#include FT_INTERNAL_CALC_H
-#include FT_TRIGONOMETRY_H
-#include FT_SYSTEM_H
-#include FT_TRUETYPE_DRIVER_H
-
-#include "ttinterp.h"
-#include "tterrors.h"
-#include "ttsubpix.h"
-
-
-#ifdef TT_USE_BYTECODE_INTERPRETER
-
-
- /*************************************************************************/
- /* */
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
- /* messages during execution. */
- /* */
-#undef FT_COMPONENT
-#define FT_COMPONENT trace_ttinterp
-
-
-#define SUBPIXEL_HINTING \
- ( ((TT_Driver)FT_FACE_DRIVER( exc->face ))->interpreter_version == \
- TT_INTERPRETER_VERSION_38 )
-
-
-#define PROJECT( v1, v2 ) \
- exc->func_project( exc, (v1)->x - (v2)->x, (v1)->y - (v2)->y )
-
-#define DUALPROJ( v1, v2 ) \
- exc->func_dualproj( exc, (v1)->x - (v2)->x, (v1)->y - (v2)->y )
-
-#define FAST_PROJECT( v ) \
- exc->func_project( exc, (v)->x, (v)->y )
-
-#define FAST_DUALPROJ( v ) \
- exc->func_dualproj( exc, (v)->x, (v)->y )
-
-
- /*************************************************************************/
- /* */
- /* Instruction dispatch function, as used by the interpreter. */
- /* */
- typedef void (*TInstruction_Function)( TT_ExecContext exc,
- FT_Long* args );
-
-
- /*************************************************************************/
- /* */
- /* Two simple bounds-checking macros. */
- /* */
-#define BOUNDS( x, n ) ( (FT_UInt)(x) >= (FT_UInt)(n) )
-#define BOUNDSL( x, n ) ( (FT_ULong)(x) >= (FT_ULong)(n) )
-
-
-#undef SUCCESS
-#define SUCCESS 0
-
-#undef FAILURE
-#define FAILURE 1
-
-
- /*************************************************************************/
- /* */
- /* CODERANGE FUNCTIONS */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Goto_CodeRange */
- /* */
- /* <Description> */
- /* Switches to a new code range (updates the code related elements in */
- /* `exec', and `IP'). */
- /* */
- /* <Input> */
- /* range :: The new execution code range. */
- /* */
- /* IP :: The new IP in the new code range. */
- /* */
- /* <InOut> */
- /* exec :: The target execution context. */
- /* */
- FT_LOCAL_DEF( void )
- TT_Goto_CodeRange( TT_ExecContext exec,
- FT_Int range,
- FT_Long IP )
- {
- TT_CodeRange* coderange;
-
-
- FT_ASSERT( range >= 1 && range <= 3 );
-
- coderange = &exec->codeRangeTable[range - 1];
-
- FT_ASSERT( coderange->base != NULL );
-
- /* NOTE: Because the last instruction of a program may be a CALL */
- /* which will return to the first byte *after* the code */
- /* range, we test for IP <= Size instead of IP < Size. */
- /* */
- FT_ASSERT( IP <= coderange->size );
-
- exec->code = coderange->base;
- exec->codeSize = coderange->size;
- exec->IP = IP;
- exec->curRange = range;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Set_CodeRange */
- /* */
- /* <Description> */
- /* Sets a code range. */
- /* */
- /* <Input> */
- /* range :: The code range index. */
- /* */
- /* base :: The new code base. */
- /* */
- /* length :: The range size in bytes. */
- /* */
- /* <InOut> */
- /* exec :: The target execution context. */
- /* */
- FT_LOCAL_DEF( void )
- TT_Set_CodeRange( TT_ExecContext exec,
- FT_Int range,
- void* base,
- FT_Long length )
- {
- FT_ASSERT( range >= 1 && range <= 3 );
-
- exec->codeRangeTable[range - 1].base = (FT_Byte*)base;
- exec->codeRangeTable[range - 1].size = length;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Clear_CodeRange */
- /* */
- /* <Description> */
- /* Clears a code range. */
- /* */
- /* <Input> */
- /* range :: The code range index. */
- /* */
- /* <InOut> */
- /* exec :: The target execution context. */
- /* */
- FT_LOCAL_DEF( void )
- TT_Clear_CodeRange( TT_ExecContext exec,
- FT_Int range )
- {
- FT_ASSERT( range >= 1 && range <= 3 );
-
- exec->codeRangeTable[range - 1].base = NULL;
- exec->codeRangeTable[range - 1].size = 0;
- }
-
-
- /*************************************************************************/
- /* */
- /* EXECUTION CONTEXT ROUTINES */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Done_Context */
- /* */
- /* <Description> */
- /* Destroys a given context. */
- /* */
- /* <Input> */
- /* exec :: A handle to the target execution context. */
- /* */
- /* memory :: A handle to the parent memory object. */
- /* */
- /* <Note> */
- /* Only the glyph loader and debugger should call this function. */
- /* */
- FT_LOCAL_DEF( void )
- TT_Done_Context( TT_ExecContext exec )
- {
- FT_Memory memory = exec->memory;
-
-
- /* points zone */
- exec->maxPoints = 0;
- exec->maxContours = 0;
-
- /* free stack */
- FT_FREE( exec->stack );
- exec->stackSize = 0;
-
- /* free call stack */
- FT_FREE( exec->callStack );
- exec->callSize = 0;
- exec->callTop = 0;
-
- /* free glyph code range */
- FT_FREE( exec->glyphIns );
- exec->glyphSize = 0;
-
- exec->size = NULL;
- exec->face = NULL;
-
- FT_FREE( exec );
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Init_Context */
- /* */
- /* <Description> */
- /* Initializes a context object. */
- /* */
- /* <Input> */
- /* memory :: A handle to the parent memory object. */
- /* */
- /* <InOut> */
- /* exec :: A handle to the target execution context. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- static FT_Error
- Init_Context( TT_ExecContext exec,
- FT_Memory memory )
- {
- FT_Error error;
-
-
- FT_TRACE1(( "Init_Context: new object at 0x%08p\n", exec ));
-
- exec->memory = memory;
- exec->callSize = 32;
-
- if ( FT_NEW_ARRAY( exec->callStack, exec->callSize ) )
- goto Fail_Memory;
-
- /* all values in the context are set to 0 already, but this is */
- /* here as a remainder */
- exec->maxPoints = 0;
- exec->maxContours = 0;
-
- exec->stackSize = 0;
- exec->glyphSize = 0;
-
- exec->stack = NULL;
- exec->glyphIns = NULL;
-
- exec->face = NULL;
- exec->size = NULL;
-
- return FT_Err_Ok;
-
- Fail_Memory:
- FT_ERROR(( "Init_Context: not enough memory for %p\n", exec ));
- TT_Done_Context( exec );
-
- return error;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Update_Max */
- /* */
- /* <Description> */
- /* Checks the size of a buffer and reallocates it if necessary. */
- /* */
- /* <Input> */
- /* memory :: A handle to the parent memory object. */
- /* */
- /* multiplier :: The size in bytes of each element in the buffer. */
- /* */
- /* new_max :: The new capacity (size) of the buffer. */
- /* */
- /* <InOut> */
- /* size :: The address of the buffer's current size expressed */
- /* in elements. */
- /* */
- /* buff :: The address of the buffer base pointer. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- Update_Max( FT_Memory memory,
- FT_ULong* size,
- FT_ULong multiplier,
- void* _pbuff,
- FT_ULong new_max )
- {
- FT_Error error;
- void** pbuff = (void**)_pbuff;
-
-
- if ( *size < new_max )
- {
- if ( FT_REALLOC( *pbuff, *size * multiplier, new_max * multiplier ) )
- return error;
- *size = new_max;
- }
-
- return FT_Err_Ok;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Load_Context */
- /* */
- /* <Description> */
- /* Prepare an execution context for glyph hinting. */
- /* */
- /* <Input> */
- /* face :: A handle to the source face object. */
- /* */
- /* size :: A handle to the source size object. */
- /* */
- /* <InOut> */
- /* exec :: A handle to the target execution context. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- /* <Note> */
- /* Only the glyph loader and debugger should call this function. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- TT_Load_Context( TT_ExecContext exec,
- TT_Face face,
- TT_Size size )
- {
- FT_Int i;
- FT_ULong tmp;
- TT_MaxProfile* maxp;
- FT_Error error;
-
-
- exec->face = face;
- maxp = &face->max_profile;
- exec->size = size;
-
- if ( size )
- {
- exec->numFDefs = size->num_function_defs;
- exec->maxFDefs = size->max_function_defs;
- exec->numIDefs = size->num_instruction_defs;
- exec->maxIDefs = size->max_instruction_defs;
- exec->FDefs = size->function_defs;
- exec->IDefs = size->instruction_defs;
- exec->tt_metrics = size->ttmetrics;
- exec->metrics = size->metrics;
-
- exec->maxFunc = size->max_func;
- exec->maxIns = size->max_ins;
-
- for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
- exec->codeRangeTable[i] = size->codeRangeTable[i];
-
- /* set graphics state */
- exec->GS = size->GS;
-
- exec->cvtSize = size->cvt_size;
- exec->cvt = size->cvt;
-
- exec->storeSize = size->storage_size;
- exec->storage = size->storage;
-
- exec->twilight = size->twilight;
-
- /* In case of multi-threading it can happen that the old size object */
- /* no longer exists, thus we must clear all glyph zone references. */
- ft_memset( &exec->zp0, 0, sizeof ( exec->zp0 ) );
- exec->zp1 = exec->zp0;
- exec->zp2 = exec->zp0;
- }
-
- /* XXX: We reserve a little more elements on the stack to deal safely */
- /* with broken fonts like arialbs, courbs, timesbs, etc. */
- tmp = (FT_ULong)exec->stackSize;
- error = Update_Max( exec->memory,
- &tmp,
- sizeof ( FT_F26Dot6 ),
- (void*)&exec->stack,
- maxp->maxStackElements + 32 );
- exec->stackSize = (FT_Long)tmp;
- if ( error )
- return error;
-
- tmp = exec->glyphSize;
- error = Update_Max( exec->memory,
- &tmp,
- sizeof ( FT_Byte ),
- (void*)&exec->glyphIns,
- maxp->maxSizeOfInstructions );
- exec->glyphSize = (FT_UShort)tmp;
- if ( error )
- return error;
-
- exec->pts.n_points = 0;
- exec->pts.n_contours = 0;
-
- exec->zp1 = exec->pts;
- exec->zp2 = exec->pts;
- exec->zp0 = exec->pts;
-
- exec->instruction_trap = FALSE;
-
- return FT_Err_Ok;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Save_Context */
- /* */
- /* <Description> */
- /* Saves the code ranges in a `size' object. */
- /* */
- /* <Input> */
- /* exec :: A handle to the source execution context. */
- /* */
- /* <InOut> */
- /* size :: A handle to the target size object. */
- /* */
- /* <Note> */
- /* Only the glyph loader and debugger should call this function. */
- /* */
- FT_LOCAL_DEF( void )
- TT_Save_Context( TT_ExecContext exec,
- TT_Size size )
- {
- FT_Int i;
-
-
- /* XXX: Will probably disappear soon with all the code range */
- /* management, which is now rather obsolete. */
- /* */
- size->num_function_defs = exec->numFDefs;
- size->num_instruction_defs = exec->numIDefs;
-
- size->max_func = exec->maxFunc;
- size->max_ins = exec->maxIns;
-
- for ( i = 0; i < TT_MAX_CODE_RANGES; i++ )
- size->codeRangeTable[i] = exec->codeRangeTable[i];
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* TT_Run_Context */
- /* */
- /* <Description> */
- /* Executes one or more instructions in the execution context. */
- /* */
- /* <Input> */
- /* debug :: A Boolean flag. If set, the function sets some internal */
- /* variables and returns immediately, otherwise TT_RunIns() */
- /* is called. */
- /* */
- /* This is commented out currently. */
- /* */
- /* <Input> */
- /* exec :: A handle to the target execution context. */
- /* */
- /* <Return> */
- /* TrueType error code. 0 means success. */
- /* */
- FT_LOCAL_DEF( FT_Error )
- TT_Run_Context( TT_ExecContext exec )
- {
- TT_Goto_CodeRange( exec, tt_coderange_glyph, 0 );
-
- exec->zp0 = exec->pts;
- exec->zp1 = exec->pts;
- exec->zp2 = exec->pts;
-
- exec->GS.gep0 = 1;
- exec->GS.gep1 = 1;
- exec->GS.gep2 = 1;
-
- exec->GS.projVector.x = 0x4000;
- exec->GS.projVector.y = 0x0000;
-
- exec->GS.freeVector = exec->GS.projVector;
- exec->GS.dualVector = exec->GS.projVector;
-
- exec->GS.round_state = 1;
- exec->GS.loop = 1;
-
- /* some glyphs leave something on the stack. so we clean it */
- /* before a new execution. */
- exec->top = 0;
- exec->callTop = 0;
-
- return exec->face->interpreter( exec );
- }
-
-
- /* The default value for `scan_control' is documented as FALSE in the */
- /* TrueType specification. This is confusing since it implies a */
- /* Boolean value. However, this is not the case, thus both the */
- /* default values of our `scan_type' and `scan_control' fields (which */
- /* the documentation's `scan_control' variable is split into) are */
- /* zero. */
-
- const TT_GraphicsState tt_default_graphics_state =
- {
- 0, 0, 0,
- { 0x4000, 0 },
- { 0x4000, 0 },
- { 0x4000, 0 },
-
- 1, 64, 1,
- TRUE, 68, 0, 0, 9, 3,
- 0, FALSE, 0, 1, 1, 1
- };
-
-
- /* documentation is in ttinterp.h */
-
- FT_EXPORT_DEF( TT_ExecContext )
- TT_New_Context( TT_Driver driver )
- {
- FT_Memory memory;
- FT_Error error;
-
- TT_ExecContext exec = NULL;
-
-
- if ( !driver )
- goto Fail;
-
- memory = driver->root.root.memory;
-
- /* allocate object */
- if ( FT_NEW( exec ) )
- goto Fail;
-
- /* initialize it; in case of error this deallocates `exec' too */
- error = Init_Context( exec, memory );
- if ( error )
- goto Fail;
-
- return exec;
-
- Fail:
- return NULL;
- }
-
-
- /*************************************************************************/
- /* */
- /* Before an opcode is executed, the interpreter verifies that there are */
- /* enough arguments on the stack, with the help of the `Pop_Push_Count' */
- /* table. */
- /* */
- /* For each opcode, the first column gives the number of arguments that */
- /* are popped from the stack; the second one gives the number of those */
- /* that are pushed in result. */
- /* */
- /* Opcodes which have a varying number of parameters in the data stream */
- /* (NPUSHB, NPUSHW) are handled specially; they have a negative value in */
- /* the `opcode_length' table, and the value in `Pop_Push_Count' is set */
- /* to zero. */
- /* */
- /*************************************************************************/
-
-
-#undef PACK
-#define PACK( x, y ) ( ( x << 4 ) | y )
-
-
- static
- const FT_Byte Pop_Push_Count[256] =
- {
- /* opcodes are gathered in groups of 16 */
- /* please keep the spaces as they are */
-
- /* SVTCA y */ PACK( 0, 0 ),
- /* SVTCA x */ PACK( 0, 0 ),
- /* SPvTCA y */ PACK( 0, 0 ),
- /* SPvTCA x */ PACK( 0, 0 ),
- /* SFvTCA y */ PACK( 0, 0 ),
- /* SFvTCA x */ PACK( 0, 0 ),
- /* SPvTL // */ PACK( 2, 0 ),
- /* SPvTL + */ PACK( 2, 0 ),
- /* SFvTL // */ PACK( 2, 0 ),
- /* SFvTL + */ PACK( 2, 0 ),
- /* SPvFS */ PACK( 2, 0 ),
- /* SFvFS */ PACK( 2, 0 ),
- /* GPv */ PACK( 0, 2 ),
- /* GFv */ PACK( 0, 2 ),
- /* SFvTPv */ PACK( 0, 0 ),
- /* ISECT */ PACK( 5, 0 ),
-
- /* SRP0 */ PACK( 1, 0 ),
- /* SRP1 */ PACK( 1, 0 ),
- /* SRP2 */ PACK( 1, 0 ),
- /* SZP0 */ PACK( 1, 0 ),
- /* SZP1 */ PACK( 1, 0 ),
- /* SZP2 */ PACK( 1, 0 ),
- /* SZPS */ PACK( 1, 0 ),
- /* SLOOP */ PACK( 1, 0 ),
- /* RTG */ PACK( 0, 0 ),
- /* RTHG */ PACK( 0, 0 ),
- /* SMD */ PACK( 1, 0 ),
- /* ELSE */ PACK( 0, 0 ),
- /* JMPR */ PACK( 1, 0 ),
- /* SCvTCi */ PACK( 1, 0 ),
- /* SSwCi */ PACK( 1, 0 ),
- /* SSW */ PACK( 1, 0 ),
-
- /* DUP */ PACK( 1, 2 ),
- /* POP */ PACK( 1, 0 ),
- /* CLEAR */ PACK( 0, 0 ),
- /* SWAP */ PACK( 2, 2 ),
- /* DEPTH */ PACK( 0, 1 ),
- /* CINDEX */ PACK( 1, 1 ),
- /* MINDEX */ PACK( 1, 0 ),
- /* AlignPTS */ PACK( 2, 0 ),
- /* INS_$28 */ PACK( 0, 0 ),
- /* UTP */ PACK( 1, 0 ),
- /* LOOPCALL */ PACK( 2, 0 ),
- /* CALL */ PACK( 1, 0 ),
- /* FDEF */ PACK( 1, 0 ),
- /* ENDF */ PACK( 0, 0 ),
- /* MDAP[0] */ PACK( 1, 0 ),
- /* MDAP[1] */ PACK( 1, 0 ),
-
- /* IUP[0] */ PACK( 0, 0 ),
- /* IUP[1] */ PACK( 0, 0 ),
- /* SHP[0] */ PACK( 0, 0 ),
- /* SHP[1] */ PACK( 0, 0 ),
- /* SHC[0] */ PACK( 1, 0 ),
- /* SHC[1] */ PACK( 1, 0 ),
- /* SHZ[0] */ PACK( 1, 0 ),
- /* SHZ[1] */ PACK( 1, 0 ),
- /* SHPIX */ PACK( 1, 0 ),
- /* IP */ PACK( 0, 0 ),
- /* MSIRP[0] */ PACK( 2, 0 ),
- /* MSIRP[1] */ PACK( 2, 0 ),
- /* AlignRP */ PACK( 0, 0 ),
- /* RTDG */ PACK( 0, 0 ),
- /* MIAP[0] */ PACK( 2, 0 ),
- /* MIAP[1] */ PACK( 2, 0 ),
-
- /* NPushB */ PACK( 0, 0 ),
- /* NPushW */ PACK( 0, 0 ),
- /* WS */ PACK( 2, 0 ),
- /* RS */ PACK( 1, 1 ),
- /* WCvtP */ PACK( 2, 0 ),
- /* RCvt */ PACK( 1, 1 ),
- /* GC[0] */ PACK( 1, 1 ),
- /* GC[1] */ PACK( 1, 1 ),
- /* SCFS */ PACK( 2, 0 ),
- /* MD[0] */ PACK( 2, 1 ),
- /* MD[1] */ PACK( 2, 1 ),
- /* MPPEM */ PACK( 0, 1 ),
- /* MPS */ PACK( 0, 1 ),
- /* FlipON */ PACK( 0, 0 ),
- /* FlipOFF */ PACK( 0, 0 ),
- /* DEBUG */ PACK( 1, 0 ),
-
- /* LT */ PACK( 2, 1 ),
- /* LTEQ */ PACK( 2, 1 ),
- /* GT */ PACK( 2, 1 ),
- /* GTEQ */ PACK( 2, 1 ),
- /* EQ */ PACK( 2, 1 ),
- /* NEQ */ PACK( 2, 1 ),
- /* ODD */ PACK( 1, 1 ),
- /* EVEN */ PACK( 1, 1 ),
- /* IF */ PACK( 1, 0 ),
- /* EIF */ PACK( 0, 0 ),
- /* AND */ PACK( 2, 1 ),
- /* OR */ PACK( 2, 1 ),
- /* NOT */ PACK( 1, 1 ),
- /* DeltaP1 */ PACK( 1, 0 ),
- /* SDB */ PACK( 1, 0 ),
- /* SDS */ PACK( 1, 0 ),
-
- /* ADD */ PACK( 2, 1 ),
- /* SUB */ PACK( 2, 1 ),
- /* DIV */ PACK( 2, 1 ),
- /* MUL */ PACK( 2, 1 ),
- /* ABS */ PACK( 1, 1 ),
- /* NEG */ PACK( 1, 1 ),
- /* FLOOR */ PACK( 1, 1 ),
- /* CEILING */ PACK( 1, 1 ),
- /* ROUND[0] */ PACK( 1, 1 ),
- /* ROUND[1] */ PACK( 1, 1 ),
- /* ROUND[2] */ PACK( 1, 1 ),
- /* ROUND[3] */ PACK( 1, 1 ),
- /* NROUND[0] */ PACK( 1, 1 ),
- /* NROUND[1] */ PACK( 1, 1 ),
- /* NROUND[2] */ PACK( 1, 1 ),
- /* NROUND[3] */ PACK( 1, 1 ),
-
- /* WCvtF */ PACK( 2, 0 ),
- /* DeltaP2 */ PACK( 1, 0 ),
- /* DeltaP3 */ PACK( 1, 0 ),
- /* DeltaCn[0] */ PACK( 1, 0 ),
- /* DeltaCn[1] */ PACK( 1, 0 ),
- /* DeltaCn[2] */ PACK( 1, 0 ),
- /* SROUND */ PACK( 1, 0 ),
- /* S45Round */ PACK( 1, 0 ),
- /* JROT */ PACK( 2, 0 ),
- /* JROF */ PACK( 2, 0 ),
- /* ROFF */ PACK( 0, 0 ),
- /* INS_$7B */ PACK( 0, 0 ),
- /* RUTG */ PACK( 0, 0 ),
- /* RDTG */ PACK( 0, 0 ),
- /* SANGW */ PACK( 1, 0 ),
- /* AA */ PACK( 1, 0 ),
-
- /* FlipPT */ PACK( 0, 0 ),
- /* FlipRgON */ PACK( 2, 0 ),
- /* FlipRgOFF */ PACK( 2, 0 ),
- /* INS_$83 */ PACK( 0, 0 ),
- /* INS_$84 */ PACK( 0, 0 ),
- /* ScanCTRL */ PACK( 1, 0 ),
- /* SDPvTL[0] */ PACK( 2, 0 ),
- /* SDPvTL[1] */ PACK( 2, 0 ),
- /* GetINFO */ PACK( 1, 1 ),
- /* IDEF */ PACK( 1, 0 ),
- /* ROLL */ PACK( 3, 3 ),
- /* MAX */ PACK( 2, 1 ),
- /* MIN */ PACK( 2, 1 ),
- /* ScanTYPE */ PACK( 1, 0 ),
- /* InstCTRL */ PACK( 2, 0 ),
- /* INS_$8F */ PACK( 0, 0 ),
-
- /* INS_$90 */ PACK( 0, 0 ),
- /* INS_$91 */ PACK( 0, 0 ),
- /* INS_$92 */ PACK( 0, 0 ),
- /* INS_$93 */ PACK( 0, 0 ),
- /* INS_$94 */ PACK( 0, 0 ),
- /* INS_$95 */ PACK( 0, 0 ),
- /* INS_$96 */ PACK( 0, 0 ),
- /* INS_$97 */ PACK( 0, 0 ),
- /* INS_$98 */ PACK( 0, 0 ),
- /* INS_$99 */ PACK( 0, 0 ),
- /* INS_$9A */ PACK( 0, 0 ),
- /* INS_$9B */ PACK( 0, 0 ),
- /* INS_$9C */ PACK( 0, 0 ),
- /* INS_$9D */ PACK( 0, 0 ),
- /* INS_$9E */ PACK( 0, 0 ),
- /* INS_$9F */ PACK( 0, 0 ),
-
- /* INS_$A0 */ PACK( 0, 0 ),
- /* INS_$A1 */ PACK( 0, 0 ),
- /* INS_$A2 */ PACK( 0, 0 ),
- /* INS_$A3 */ PACK( 0, 0 ),
- /* INS_$A4 */ PACK( 0, 0 ),
- /* INS_$A5 */ PACK( 0, 0 ),
- /* INS_$A6 */ PACK( 0, 0 ),
- /* INS_$A7 */ PACK( 0, 0 ),
- /* INS_$A8 */ PACK( 0, 0 ),
- /* INS_$A9 */ PACK( 0, 0 ),
- /* INS_$AA */ PACK( 0, 0 ),
- /* INS_$AB */ PACK( 0, 0 ),
- /* INS_$AC */ PACK( 0, 0 ),
- /* INS_$AD */ PACK( 0, 0 ),
- /* INS_$AE */ PACK( 0, 0 ),
- /* INS_$AF */ PACK( 0, 0 ),
-
- /* PushB[0] */ PACK( 0, 1 ),
- /* PushB[1] */ PACK( 0, 2 ),
- /* PushB[2] */ PACK( 0, 3 ),
- /* PushB[3] */ PACK( 0, 4 ),
- /* PushB[4] */ PACK( 0, 5 ),
- /* PushB[5] */ PACK( 0, 6 ),
- /* PushB[6] */ PACK( 0, 7 ),
- /* PushB[7] */ PACK( 0, 8 ),
- /* PushW[0] */ PACK( 0, 1 ),
- /* PushW[1] */ PACK( 0, 2 ),
- /* PushW[2] */ PACK( 0, 3 ),
- /* PushW[3] */ PACK( 0, 4 ),
- /* PushW[4] */ PACK( 0, 5 ),
- /* PushW[5] */ PACK( 0, 6 ),
- /* PushW[6] */ PACK( 0, 7 ),
- /* PushW[7] */ PACK( 0, 8 ),
-
- /* MDRP[00] */ PACK( 1, 0 ),
- /* MDRP[01] */ PACK( 1, 0 ),
- /* MDRP[02] */ PACK( 1, 0 ),
- /* MDRP[03] */ PACK( 1, 0 ),
- /* MDRP[04] */ PACK( 1, 0 ),
- /* MDRP[05] */ PACK( 1, 0 ),
- /* MDRP[06] */ PACK( 1, 0 ),
- /* MDRP[07] */ PACK( 1, 0 ),
- /* MDRP[08] */ PACK( 1, 0 ),
- /* MDRP[09] */ PACK( 1, 0 ),
- /* MDRP[10] */ PACK( 1, 0 ),
- /* MDRP[11] */ PACK( 1, 0 ),
- /* MDRP[12] */ PACK( 1, 0 ),
- /* MDRP[13] */ PACK( 1, 0 ),
- /* MDRP[14] */ PACK( 1, 0 ),
- /* MDRP[15] */ PACK( 1, 0 ),
-
- /* MDRP[16] */ PACK( 1, 0 ),
- /* MDRP[17] */ PACK( 1, 0 ),
- /* MDRP[18] */ PACK( 1, 0 ),
- /* MDRP[19] */ PACK( 1, 0 ),
- /* MDRP[20] */ PACK( 1, 0 ),
- /* MDRP[21] */ PACK( 1, 0 ),
- /* MDRP[22] */ PACK( 1, 0 ),
- /* MDRP[23] */ PACK( 1, 0 ),
- /* MDRP[24] */ PACK( 1, 0 ),
- /* MDRP[25] */ PACK( 1, 0 ),
- /* MDRP[26] */ PACK( 1, 0 ),
- /* MDRP[27] */ PACK( 1, 0 ),
- /* MDRP[28] */ PACK( 1, 0 ),
- /* MDRP[29] */ PACK( 1, 0 ),
- /* MDRP[30] */ PACK( 1, 0 ),
- /* MDRP[31] */ PACK( 1, 0 ),
-
- /* MIRP[00] */ PACK( 2, 0 ),
- /* MIRP[01] */ PACK( 2, 0 ),
- /* MIRP[02] */ PACK( 2, 0 ),
- /* MIRP[03] */ PACK( 2, 0 ),
- /* MIRP[04] */ PACK( 2, 0 ),
- /* MIRP[05] */ PACK( 2, 0 ),
- /* MIRP[06] */ PACK( 2, 0 ),
- /* MIRP[07] */ PACK( 2, 0 ),
- /* MIRP[08] */ PACK( 2, 0 ),
- /* MIRP[09] */ PACK( 2, 0 ),
- /* MIRP[10] */ PACK( 2, 0 ),
- /* MIRP[11] */ PACK( 2, 0 ),
- /* MIRP[12] */ PACK( 2, 0 ),
- /* MIRP[13] */ PACK( 2, 0 ),
- /* MIRP[14] */ PACK( 2, 0 ),
- /* MIRP[15] */ PACK( 2, 0 ),
-
- /* MIRP[16] */ PACK( 2, 0 ),
- /* MIRP[17] */ PACK( 2, 0 ),
- /* MIRP[18] */ PACK( 2, 0 ),
- /* MIRP[19] */ PACK( 2, 0 ),
- /* MIRP[20] */ PACK( 2, 0 ),
- /* MIRP[21] */ PACK( 2, 0 ),
- /* MIRP[22] */ PACK( 2, 0 ),
- /* MIRP[23] */ PACK( 2, 0 ),
- /* MIRP[24] */ PACK( 2, 0 ),
- /* MIRP[25] */ PACK( 2, 0 ),
- /* MIRP[26] */ PACK( 2, 0 ),
- /* MIRP[27] */ PACK( 2, 0 ),
- /* MIRP[28] */ PACK( 2, 0 ),
- /* MIRP[29] */ PACK( 2, 0 ),
- /* MIRP[30] */ PACK( 2, 0 ),
- /* MIRP[31] */ PACK( 2, 0 )
- };
-
-
-#ifdef FT_DEBUG_LEVEL_TRACE
-
- /* the first hex digit gives the length of the opcode name; the space */
- /* after the digit is here just to increase readability of the source */
- /* code */
-
- static
- const char* const opcode_name[256] =
- {
- "7 SVTCA y",
- "7 SVTCA x",
- "8 SPvTCA y",
- "8 SPvTCA x",
- "8 SFvTCA y",
- "8 SFvTCA x",
- "8 SPvTL ||",
- "7 SPvTL +",
- "8 SFvTL ||",
- "7 SFvTL +",
- "5 SPvFS",
- "5 SFvFS",
- "3 GPv",
- "3 GFv",
- "6 SFvTPv",
- "5 ISECT",
-
- "4 SRP0",
- "4 SRP1",
- "4 SRP2",
- "4 SZP0",
- "4 SZP1",
- "4 SZP2",
- "4 SZPS",
- "5 SLOOP",
- "3 RTG",
- "4 RTHG",
- "3 SMD",
- "4 ELSE",
- "4 JMPR",
- "6 SCvTCi",
- "5 SSwCi",
- "3 SSW",
-
- "3 DUP",
- "3 POP",
- "5 CLEAR",
- "4 SWAP",
- "5 DEPTH",
- "6 CINDEX",
- "6 MINDEX",
- "8 AlignPTS",
- "7 INS_$28",
- "3 UTP",
- "8 LOOPCALL",
- "4 CALL",
- "4 FDEF",
- "4 ENDF",
- "7 MDAP[0]",
- "7 MDAP[1]",
-
- "6 IUP[0]",
- "6 IUP[1]",
- "6 SHP[0]",
- "6 SHP[1]",
- "6 SHC[0]",
- "6 SHC[1]",
- "6 SHZ[0]",
- "6 SHZ[1]",
- "5 SHPIX",
- "2 IP",
- "8 MSIRP[0]",
- "8 MSIRP[1]",
- "7 AlignRP",
- "4 RTDG",
- "7 MIAP[0]",
- "7 MIAP[1]",
-
- "6 NPushB",
- "6 NPushW",
- "2 WS",
- "2 RS",
- "5 WCvtP",
- "4 RCvt",
- "5 GC[0]",
- "5 GC[1]",
- "4 SCFS",
- "5 MD[0]",
- "5 MD[1]",
- "5 MPPEM",
- "3 MPS",
- "6 FlipON",
- "7 FlipOFF",
- "5 DEBUG",
-
- "2 LT",
- "4 LTEQ",
- "2 GT",
- "4 GTEQ",
- "2 EQ",
- "3 NEQ",
- "3 ODD",
- "4 EVEN",
- "2 IF",
- "3 EIF",
- "3 AND",
- "2 OR",
- "3 NOT",
- "7 DeltaP1",
- "3 SDB",
- "3 SDS",
-
- "3 ADD",
- "3 SUB",
- "3 DIV",
- "3 MUL",
- "3 ABS",
- "3 NEG",
- "5 FLOOR",
- "7 CEILING",
- "8 ROUND[0]",
- "8 ROUND[1]",
- "8 ROUND[2]",
- "8 ROUND[3]",
- "9 NROUND[0]",
- "9 NROUND[1]",
- "9 NROUND[2]",
- "9 NROUND[3]",
-
- "5 WCvtF",
- "7 DeltaP2",
- "7 DeltaP3",
- "A DeltaCn[0]",
- "A DeltaCn[1]",
- "A DeltaCn[2]",
- "6 SROUND",
- "8 S45Round",
- "4 JROT",
- "4 JROF",
- "4 ROFF",
- "7 INS_$7B",
- "4 RUTG",
- "4 RDTG",
- "5 SANGW",
- "2 AA",
-
- "6 FlipPT",
- "8 FlipRgON",
- "9 FlipRgOFF",
- "7 INS_$83",
- "7 INS_$84",
- "8 ScanCTRL",
- "9 SDPvTL[0]",
- "9 SDPvTL[1]",
- "7 GetINFO",
- "4 IDEF",
- "4 ROLL",
- "3 MAX",
- "3 MIN",
- "8 ScanTYPE",
- "8 InstCTRL",
- "7 INS_$8F",
-
- "7 INS_$90",
- "7 INS_$91",
- "7 INS_$92",
- "7 INS_$93",
- "7 INS_$94",
- "7 INS_$95",
- "7 INS_$96",
- "7 INS_$97",
- "7 INS_$98",
- "7 INS_$99",
- "7 INS_$9A",
- "7 INS_$9B",
- "7 INS_$9C",
- "7 INS_$9D",
- "7 INS_$9E",
- "7 INS_$9F",
-
- "7 INS_$A0",
- "7 INS_$A1",
- "7 INS_$A2",
- "7 INS_$A3",
- "7 INS_$A4",
- "7 INS_$A5",
- "7 INS_$A6",
- "7 INS_$A7",
- "7 INS_$A8",
- "7 INS_$A9",
- "7 INS_$AA",
- "7 INS_$AB",
- "7 INS_$AC",
- "7 INS_$AD",
- "7 INS_$AE",
- "7 INS_$AF",
-
- "8 PushB[0]",
- "8 PushB[1]",
- "8 PushB[2]",
- "8 PushB[3]",
- "8 PushB[4]",
- "8 PushB[5]",
- "8 PushB[6]",
- "8 PushB[7]",
- "8 PushW[0]",
- "8 PushW[1]",
- "8 PushW[2]",
- "8 PushW[3]",
- "8 PushW[4]",
- "8 PushW[5]",
- "8 PushW[6]",
- "8 PushW[7]",
-
- "8 MDRP[00]",
- "8 MDRP[01]",
- "8 MDRP[02]",
- "8 MDRP[03]",
- "8 MDRP[04]",
- "8 MDRP[05]",
- "8 MDRP[06]",
- "8 MDRP[07]",
- "8 MDRP[08]",
- "8 MDRP[09]",
- "8 MDRP[10]",
- "8 MDRP[11]",
- "8 MDRP[12]",
- "8 MDRP[13]",
- "8 MDRP[14]",
- "8 MDRP[15]",
-
- "8 MDRP[16]",
- "8 MDRP[17]",
- "8 MDRP[18]",
- "8 MDRP[19]",
- "8 MDRP[20]",
- "8 MDRP[21]",
- "8 MDRP[22]",
- "8 MDRP[23]",
- "8 MDRP[24]",
- "8 MDRP[25]",
- "8 MDRP[26]",
- "8 MDRP[27]",
- "8 MDRP[28]",
- "8 MDRP[29]",
- "8 MDRP[30]",
- "8 MDRP[31]",
-
- "8 MIRP[00]",
- "8 MIRP[01]",
- "8 MIRP[02]",
- "8 MIRP[03]",
- "8 MIRP[04]",
- "8 MIRP[05]",
- "8 MIRP[06]",
- "8 MIRP[07]",
- "8 MIRP[08]",
- "8 MIRP[09]",
- "8 MIRP[10]",
- "8 MIRP[11]",
- "8 MIRP[12]",
- "8 MIRP[13]",
- "8 MIRP[14]",
- "8 MIRP[15]",
-
- "8 MIRP[16]",
- "8 MIRP[17]",
- "8 MIRP[18]",
- "8 MIRP[19]",
- "8 MIRP[20]",
- "8 MIRP[21]",
- "8 MIRP[22]",
- "8 MIRP[23]",
- "8 MIRP[24]",
- "8 MIRP[25]",
- "8 MIRP[26]",
- "8 MIRP[27]",
- "8 MIRP[28]",
- "8 MIRP[29]",
- "8 MIRP[30]",
- "8 MIRP[31]"
- };
-
-#endif /* FT_DEBUG_LEVEL_TRACE */
-
-
- static
- const FT_Char opcode_length[256] =
- {
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-
- -1,-2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 3, 4, 5, 6, 7, 8, 9, 3, 5, 7, 9, 11,13,15,17,
-
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
- };
-
-#undef PACK
-
-
-#ifndef FT_CONFIG_OPTION_NO_ASSEMBLER
-
-#if defined( __arm__ ) && \
- ( defined( __thumb2__ ) || !defined( __thumb__ ) )
-
-#define TT_MulFix14 TT_MulFix14_arm
-
- static FT_Int32
- TT_MulFix14_arm( FT_Int32 a,
- FT_Int b )
- {
- FT_Int32 t, t2;
-
-
-#if defined( __CC_ARM ) || defined( __ARMCC__ )
-
- __asm
- {
- smull t2, t, b, a /* (lo=t2,hi=t) = a*b */
- mov a, t, asr #31 /* a = (hi >> 31) */
- add a, a, #0x2000 /* a += 0x2000 */
- adds t2, t2, a /* t2 += a */
- adc t, t, #0 /* t += carry */
- mov a, t2, lsr #14 /* a = t2 >> 14 */
- orr a, a, t, lsl #18 /* a |= t << 18 */
- }
-
-#elif defined( __GNUC__ )
-
- __asm__ __volatile__ (
- "smull %1, %2, %4, %3\n\t" /* (lo=%1,hi=%2) = a*b */
- "mov %0, %2, asr #31\n\t" /* %0 = (hi >> 31) */
-#if defined( __clang__ ) && defined( __thumb2__ )
- "add.w %0, %0, #0x2000\n\t" /* %0 += 0x2000 */
-#else
- "add %0, %0, #0x2000\n\t" /* %0 += 0x2000 */
-#endif
- "adds %1, %1, %0\n\t" /* %1 += %0 */
- "adc %2, %2, #0\n\t" /* %2 += carry */
- "mov %0, %1, lsr #14\n\t" /* %0 = %1 >> 16 */
- "orr %0, %0, %2, lsl #18\n\t" /* %0 |= %2 << 16 */
- : "=r"(a), "=&r"(t2), "=&r"(t)
- : "r"(a), "r"(b)
- : "cc" );
-
-#endif
-
- return a;
- }
-
-#endif /* __arm__ && ( __thumb2__ || !__thumb__ ) */
-
-#endif /* !FT_CONFIG_OPTION_NO_ASSEMBLER */
-
-
-#if defined( __GNUC__ ) && \
- ( defined( __i386__ ) || defined( __x86_64__ ) )
-
-#define TT_MulFix14 TT_MulFix14_long_long
-
- /* Temporarily disable the warning that C90 doesn't support `long long'. */
-#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
-#pragma GCC diagnostic push
-#endif
-#pragma GCC diagnostic ignored "-Wlong-long"
-
- /* This is declared `noinline' because inlining the function results */
- /* in slower code. The `pure' attribute indicates that the result */
- /* only depends on the parameters. */
- static __attribute__(( noinline ))
- __attribute__(( pure )) FT_Int32
- TT_MulFix14_long_long( FT_Int32 a,
- FT_Int b )
- {
-
- long long ret = (long long)a * b;
-
- /* The following line assumes that right shifting of signed values */
- /* will actually preserve the sign bit. The exact behaviour is */
- /* undefined, but this is true on x86 and x86_64. */
- long long tmp = ret >> 63;
-
-
- ret += 0x2000 + tmp;
-
- return (FT_Int32)( ret >> 14 );
- }
-
-#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
-#pragma GCC diagnostic pop
-#endif
-
-#endif /* __GNUC__ && ( __i386__ || __x86_64__ ) */
-
-
-#ifndef TT_MulFix14
-
- /* Compute (a*b)/2^14 with maximum accuracy and rounding. */
- /* This is optimized to be faster than calling FT_MulFix() */
- /* for platforms where sizeof(int) == 2. */
- static FT_Int32
- TT_MulFix14( FT_Int32 a,
- FT_Int b )
- {
- FT_Int32 sign;
- FT_UInt32 ah, al, mid, lo, hi;
-
-
- sign = a ^ b;
-
- if ( a < 0 )
- a = -a;
- if ( b < 0 )
- b = -b;
-
- ah = (FT_UInt32)( ( a >> 16 ) & 0xFFFFU );
- al = (FT_UInt32)( a & 0xFFFFU );
-
- lo = al * b;
- mid = ah * b;
- hi = mid >> 16;
- mid = ( mid << 16 ) + ( 1 << 13 ); /* rounding */
- lo += mid;
- if ( lo < mid )
- hi += 1;
-
- mid = ( lo >> 14 ) | ( hi << 18 );
-
- return sign >= 0 ? (FT_Int32)mid : -(FT_Int32)mid;
- }
-
-#endif /* !TT_MulFix14 */
-
-
-#if defined( __GNUC__ ) && \
- ( defined( __i386__ ) || \
- defined( __x86_64__ ) || \
- defined( __arm__ ) )
-
-#define TT_DotFix14 TT_DotFix14_long_long
-
-#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
-#pragma GCC diagnostic push
-#endif
-#pragma GCC diagnostic ignored "-Wlong-long"
-
- static __attribute__(( pure )) FT_Int32
- TT_DotFix14_long_long( FT_Int32 ax,
- FT_Int32 ay,
- FT_Int bx,
- FT_Int by )
- {
- /* Temporarily disable the warning that C90 doesn't support */
- /* `long long'. */
-
- long long temp1 = (long long)ax * bx;
- long long temp2 = (long long)ay * by;
-
-
- temp1 += temp2;
- temp2 = temp1 >> 63;
- temp1 += 0x2000 + temp2;
-
- return (FT_Int32)( temp1 >> 14 );
-
- }
-
-#if ( __GNUC__ * 100 + __GNUC_MINOR__ ) >= 406
-#pragma GCC diagnostic pop
-#endif
-
-#endif /* __GNUC__ && (__arm__ || __i386__ || __x86_64__) */
-
-
-#ifndef TT_DotFix14
-
- /* compute (ax*bx+ay*by)/2^14 with maximum accuracy and rounding */
- static FT_Int32
- TT_DotFix14( FT_Int32 ax,
- FT_Int32 ay,
- FT_Int bx,
- FT_Int by )
- {
- FT_Int32 m, s, hi1, hi2, hi;
- FT_UInt32 l, lo1, lo2, lo;
-
-
- /* compute ax*bx as 64-bit value */
- l = (FT_UInt32)( ( ax & 0xFFFFU ) * bx );
- m = ( ax >> 16 ) * bx;
-
- lo1 = l + ( (FT_UInt32)m << 16 );
- hi1 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo1 < l );
-
- /* compute ay*by as 64-bit value */
- l = (FT_UInt32)( ( ay & 0xFFFFU ) * by );
- m = ( ay >> 16 ) * by;
-
- lo2 = l + ( (FT_UInt32)m << 16 );
- hi2 = ( m >> 16 ) + ( (FT_Int32)l >> 31 ) + ( lo2 < l );
-
- /* add them */
- lo = lo1 + lo2;
- hi = hi1 + hi2 + ( lo < lo1 );
-
- /* divide the result by 2^14 with rounding */
- s = hi >> 31;
- l = lo + (FT_UInt32)s;
- hi += s + ( l < lo );
- lo = l;
-
- l = lo + 0x2000U;
- hi += ( l < lo );
-
- return (FT_Int32)( ( (FT_UInt32)hi << 18 ) | ( l >> 14 ) );
- }
-
-#endif /* TT_DotFix14 */
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Current_Ratio */
- /* */
- /* <Description> */
- /* Returns the current aspect ratio scaling factor depending on the */
- /* projection vector's state and device resolutions. */
- /* */
- /* <Return> */
- /* The aspect ratio in 16.16 format, always <= 1.0 . */
- /* */
- static FT_Long
- Current_Ratio( TT_ExecContext exc )
- {
- if ( !exc->tt_metrics.ratio )
- {
- if ( exc->GS.projVector.y == 0 )
- exc->tt_metrics.ratio = exc->tt_metrics.x_ratio;
-
- else if ( exc->GS.projVector.x == 0 )
- exc->tt_metrics.ratio = exc->tt_metrics.y_ratio;
-
- else
- {
- FT_F26Dot6 x, y;
-
-
- x = TT_MulFix14( exc->tt_metrics.x_ratio,
- exc->GS.projVector.x );
- y = TT_MulFix14( exc->tt_metrics.y_ratio,
- exc->GS.projVector.y );
- exc->tt_metrics.ratio = FT_Hypot( x, y );
- }
- }
- return exc->tt_metrics.ratio;
- }
-
-
- FT_CALLBACK_DEF( FT_Long )
- Current_Ppem( TT_ExecContext exc )
- {
- return exc->tt_metrics.ppem;
- }
-
-
- FT_CALLBACK_DEF( FT_Long )
- Current_Ppem_Stretched( TT_ExecContext exc )
- {
- return FT_MulFix( exc->tt_metrics.ppem, Current_Ratio( exc ) );
- }
-
-
- /*************************************************************************/
- /* */
- /* Functions related to the control value table (CVT). */
- /* */
- /*************************************************************************/
-
-
- FT_CALLBACK_DEF( FT_F26Dot6 )
- Read_CVT( TT_ExecContext exc,
- FT_ULong idx )
- {
- return exc->cvt[idx];
- }
-
-
- FT_CALLBACK_DEF( FT_F26Dot6 )
- Read_CVT_Stretched( TT_ExecContext exc,
- FT_ULong idx )
- {
- return FT_MulFix( exc->cvt[idx], Current_Ratio( exc ) );
- }
-
-
- FT_CALLBACK_DEF( void )
- Write_CVT( TT_ExecContext exc,
- FT_ULong idx,
- FT_F26Dot6 value )
- {
- exc->cvt[idx] = value;
- }
-
-
- FT_CALLBACK_DEF( void )
- Write_CVT_Stretched( TT_ExecContext exc,
- FT_ULong idx,
- FT_F26Dot6 value )
- {
- exc->cvt[idx] = FT_DivFix( value, Current_Ratio( exc ) );
- }
-
-
- FT_CALLBACK_DEF( void )
- Move_CVT( TT_ExecContext exc,
- FT_ULong idx,
- FT_F26Dot6 value )
- {
- exc->cvt[idx] += value;
- }
-
-
- FT_CALLBACK_DEF( void )
- Move_CVT_Stretched( TT_ExecContext exc,
- FT_ULong idx,
- FT_F26Dot6 value )
- {
- exc->cvt[idx] += FT_DivFix( value, Current_Ratio( exc ) );
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* GetShortIns */
- /* */
- /* <Description> */
- /* Returns a short integer taken from the instruction stream at */
- /* address IP. */
- /* */
- /* <Return> */
- /* Short read at code[IP]. */
- /* */
- /* <Note> */
- /* This one could become a macro. */
- /* */
- static FT_Short
- GetShortIns( TT_ExecContext exc )
- {
- /* Reading a byte stream so there is no endianess (DaveP) */
- exc->IP += 2;
- return (FT_Short)( ( exc->code[exc->IP - 2] << 8 ) +
- exc->code[exc->IP - 1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Ins_Goto_CodeRange */
- /* */
- /* <Description> */
- /* Goes to a certain code range in the instruction stream. */
- /* */
- /* <Input> */
- /* aRange :: The index of the code range. */
- /* */
- /* aIP :: The new IP address in the code range. */
- /* */
- /* <Return> */
- /* SUCCESS or FAILURE. */
- /* */
- static FT_Bool
- Ins_Goto_CodeRange( TT_ExecContext exc,
- FT_Int aRange,
- FT_Long aIP )
- {
- TT_CodeRange* range;
-
-
- if ( aRange < 1 || aRange > 3 )
- {
- exc->error = FT_THROW( Bad_Argument );
- return FAILURE;
- }
-
- range = &exc->codeRangeTable[aRange - 1];
-
- if ( range->base == NULL ) /* invalid coderange */
- {
- exc->error = FT_THROW( Invalid_CodeRange );
- return FAILURE;
- }
-
- /* NOTE: Because the last instruction of a program may be a CALL */
- /* which will return to the first byte *after* the code */
- /* range, we test for aIP <= Size, instead of aIP < Size. */
-
- if ( aIP > range->size )
- {
- exc->error = FT_THROW( Code_Overflow );
- return FAILURE;
- }
-
- exc->code = range->base;
- exc->codeSize = range->size;
- exc->IP = aIP;
- exc->curRange = aRange;
-
- return SUCCESS;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Direct_Move */
- /* */
- /* <Description> */
- /* Moves a point by a given distance along the freedom vector. The */
- /* point will be `touched'. */
- /* */
- /* <Input> */
- /* point :: The index of the point to move. */
- /* */
- /* distance :: The distance to apply. */
- /* */
- /* <InOut> */
- /* zone :: The affected glyph zone. */
- /* */
- static void
- Direct_Move( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_F26Dot6 v;
-
-
- v = exc->GS.freeVector.x;
-
- if ( v != 0 )
- {
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( !SUBPIXEL_HINTING ||
- ( !exc->ignore_x_mode ||
- ( exc->sph_tweak_flags & SPH_TWEAK_ALLOW_X_DMOVE ) ) )
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- zone->cur[point].x += FT_MulDiv( distance, v, exc->F_dot_P );
-
- zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
- }
-
- v = exc->GS.freeVector.y;
-
- if ( v != 0 )
- {
- zone->cur[point].y += FT_MulDiv( distance, v, exc->F_dot_P );
-
- zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Direct_Move_Orig */
- /* */
- /* <Description> */
- /* Moves the *original* position of a point by a given distance along */
- /* the freedom vector. Obviously, the point will not be `touched'. */
- /* */
- /* <Input> */
- /* point :: The index of the point to move. */
- /* */
- /* distance :: The distance to apply. */
- /* */
- /* <InOut> */
- /* zone :: The affected glyph zone. */
- /* */
- static void
- Direct_Move_Orig( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_F26Dot6 v;
-
-
- v = exc->GS.freeVector.x;
-
- if ( v != 0 )
- zone->org[point].x += FT_MulDiv( distance, v, exc->F_dot_P );
-
- v = exc->GS.freeVector.y;
-
- if ( v != 0 )
- zone->org[point].y += FT_MulDiv( distance, v, exc->F_dot_P );
- }
-
-
- /*************************************************************************/
- /* */
- /* Special versions of Direct_Move() */
- /* */
- /* The following versions are used whenever both vectors are both */
- /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
- /* */
- /*************************************************************************/
-
-
- static void
- Direct_Move_X( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_UNUSED( exc );
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( !SUBPIXEL_HINTING ||
- !exc->ignore_x_mode )
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- zone->cur[point].x += distance;
-
- zone->tags[point] |= FT_CURVE_TAG_TOUCH_X;
- }
-
-
- static void
- Direct_Move_Y( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_UNUSED( exc );
-
- zone->cur[point].y += distance;
- zone->tags[point] |= FT_CURVE_TAG_TOUCH_Y;
- }
-
-
- /*************************************************************************/
- /* */
- /* Special versions of Direct_Move_Orig() */
- /* */
- /* The following versions are used whenever both vectors are both */
- /* along one of the coordinate unit vectors, i.e. in 90% of the cases. */
- /* */
- /*************************************************************************/
-
-
- static void
- Direct_Move_Orig_X( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_UNUSED( exc );
-
- zone->org[point].x += distance;
- }
-
-
- static void
- Direct_Move_Orig_Y( TT_ExecContext exc,
- TT_GlyphZone zone,
- FT_UShort point,
- FT_F26Dot6 distance )
- {
- FT_UNUSED( exc );
-
- zone->org[point].y += distance;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_None */
- /* */
- /* <Description> */
- /* Does not round, but adds engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance (not) to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* The compensated distance. */
- /* */
- /* <Note> */
- /* The TrueType specification says very few about the relationship */
- /* between rounding and engine compensation. However, it seems from */
- /* the description of super round that we should add the compensation */
- /* before rounding. */
- /* */
- static FT_F26Dot6
- Round_None( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = distance + compensation;
- if ( val < 0 )
- val = 0;
- }
- else
- {
- val = distance - compensation;
- if ( val > 0 )
- val = 0;
- }
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_To_Grid */
- /* */
- /* <Description> */
- /* Rounds value to grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- static FT_F26Dot6
- Round_To_Grid( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = FT_PIX_ROUND( distance + compensation );
- if ( val < 0 )
- val = 0;
- }
- else
- {
- val = -FT_PIX_ROUND( compensation - distance );
- if ( val > 0 )
- val = 0;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_To_Half_Grid */
- /* */
- /* <Description> */
- /* Rounds value to half grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- static FT_F26Dot6
- Round_To_Half_Grid( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = FT_PIX_FLOOR( distance + compensation ) + 32;
- if ( val < 0 )
- val = 32;
- }
- else
- {
- val = -( FT_PIX_FLOOR( compensation - distance ) + 32 );
- if ( val > 0 )
- val = -32;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_Down_To_Grid */
- /* */
- /* <Description> */
- /* Rounds value down to grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- static FT_F26Dot6
- Round_Down_To_Grid( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = FT_PIX_FLOOR( distance + compensation );
- if ( val < 0 )
- val = 0;
- }
- else
- {
- val = -FT_PIX_FLOOR( compensation - distance );
- if ( val > 0 )
- val = 0;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_Up_To_Grid */
- /* */
- /* <Description> */
- /* Rounds value up to grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- static FT_F26Dot6
- Round_Up_To_Grid( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = FT_PIX_CEIL( distance + compensation );
- if ( val < 0 )
- val = 0;
- }
- else
- {
- val = -FT_PIX_CEIL( compensation - distance );
- if ( val > 0 )
- val = 0;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_To_Double_Grid */
- /* */
- /* <Description> */
- /* Rounds value to double grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- static FT_F26Dot6
- Round_To_Double_Grid( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
- FT_UNUSED( exc );
-
-
- if ( distance >= 0 )
- {
- val = FT_PAD_ROUND( distance + compensation, 32 );
- if ( val < 0 )
- val = 0;
- }
- else
- {
- val = -FT_PAD_ROUND( compensation - distance, 32 );
- if ( val > 0 )
- val = 0;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_Super */
- /* */
- /* <Description> */
- /* Super-rounds value to grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- /* <Note> */
- /* The TrueType specification says very few about the relationship */
- /* between rounding and engine compensation. However, it seems from */
- /* the description of super round that we should add the compensation */
- /* before rounding. */
- /* */
- static FT_F26Dot6
- Round_Super( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
-
- if ( distance >= 0 )
- {
- val = ( distance - exc->phase + exc->threshold + compensation ) &
- -exc->period;
- val += exc->phase;
- if ( val < 0 )
- val = exc->phase;
- }
- else
- {
- val = -( ( exc->threshold - exc->phase - distance + compensation ) &
- -exc->period );
- val -= exc->phase;
- if ( val > 0 )
- val = -exc->phase;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Round_Super_45 */
- /* */
- /* <Description> */
- /* Super-rounds value to grid after adding engine compensation. */
- /* */
- /* <Input> */
- /* distance :: The distance to round. */
- /* */
- /* compensation :: The engine compensation. */
- /* */
- /* <Return> */
- /* Rounded distance. */
- /* */
- /* <Note> */
- /* There is a separate function for Round_Super_45() as we may need */
- /* greater precision. */
- /* */
- static FT_F26Dot6
- Round_Super_45( TT_ExecContext exc,
- FT_F26Dot6 distance,
- FT_F26Dot6 compensation )
- {
- FT_F26Dot6 val;
-
-
- if ( distance >= 0 )
- {
- val = ( ( distance - exc->phase + exc->threshold + compensation ) /
- exc->period ) * exc->period;
- val += exc->phase;
- if ( val < 0 )
- val = exc->phase;
- }
- else
- {
- val = -( ( ( exc->threshold - exc->phase - distance + compensation ) /
- exc->period ) * exc->period );
- val -= exc->phase;
- if ( val > 0 )
- val = -exc->phase;
- }
-
- return val;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Compute_Round */
- /* */
- /* <Description> */
- /* Sets the rounding mode. */
- /* */
- /* <Input> */
- /* round_mode :: The rounding mode to be used. */
- /* */
- static void
- Compute_Round( TT_ExecContext exc,
- FT_Byte round_mode )
- {
- switch ( round_mode )
- {
- case TT_Round_Off:
- exc->func_round = (TT_Round_Func)Round_None;
- break;
-
- case TT_Round_To_Grid:
- exc->func_round = (TT_Round_Func)Round_To_Grid;
- break;
-
- case TT_Round_Up_To_Grid:
- exc->func_round = (TT_Round_Func)Round_Up_To_Grid;
- break;
-
- case TT_Round_Down_To_Grid:
- exc->func_round = (TT_Round_Func)Round_Down_To_Grid;
- break;
-
- case TT_Round_To_Half_Grid:
- exc->func_round = (TT_Round_Func)Round_To_Half_Grid;
- break;
-
- case TT_Round_To_Double_Grid:
- exc->func_round = (TT_Round_Func)Round_To_Double_Grid;
- break;
-
- case TT_Round_Super:
- exc->func_round = (TT_Round_Func)Round_Super;
- break;
-
- case TT_Round_Super_45:
- exc->func_round = (TT_Round_Func)Round_Super_45;
- break;
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* SetSuperRound */
- /* */
- /* <Description> */
- /* Sets Super Round parameters. */
- /* */
- /* <Input> */
- /* GridPeriod :: The grid period. */
- /* */
- /* selector :: The SROUND opcode. */
- /* */
- static void
- SetSuperRound( TT_ExecContext exc,
- FT_F2Dot14 GridPeriod,
- FT_Long selector )
- {
- switch ( (FT_Int)( selector & 0xC0 ) )
- {
- case 0:
- exc->period = GridPeriod / 2;
- break;
-
- case 0x40:
- exc->period = GridPeriod;
- break;
-
- case 0x80:
- exc->period = GridPeriod * 2;
- break;
-
- /* This opcode is reserved, but... */
- case 0xC0:
- exc->period = GridPeriod;
- break;
- }
-
- switch ( (FT_Int)( selector & 0x30 ) )
- {
- case 0:
- exc->phase = 0;
- break;
-
- case 0x10:
- exc->phase = exc->period / 4;
- break;
-
- case 0x20:
- exc->phase = exc->period / 2;
- break;
-
- case 0x30:
- exc->phase = exc->period * 3 / 4;
- break;
- }
-
- if ( ( selector & 0x0F ) == 0 )
- exc->threshold = exc->period - 1;
- else
- exc->threshold = ( (FT_Int)( selector & 0x0F ) - 4 ) * exc->period / 8;
-
- /* convert to F26Dot6 format */
- exc->period >>= 8;
- exc->phase >>= 8;
- exc->threshold >>= 8;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Project */
- /* */
- /* <Description> */
- /* Computes the projection of vector given by (v2-v1) along the */
- /* current projection vector. */
- /* */
- /* <Input> */
- /* v1 :: First input vector. */
- /* v2 :: Second input vector. */
- /* */
- /* <Return> */
- /* The distance in F26dot6 format. */
- /* */
- static FT_F26Dot6
- Project( TT_ExecContext exc,
- FT_Pos dx,
- FT_Pos dy )
- {
- return TT_DotFix14( dx, dy,
- exc->GS.projVector.x,
- exc->GS.projVector.y );
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Dual_Project */
- /* */
- /* <Description> */
- /* Computes the projection of the vector given by (v2-v1) along the */
- /* current dual vector. */
- /* */
- /* <Input> */
- /* v1 :: First input vector. */
- /* v2 :: Second input vector. */
- /* */
- /* <Return> */
- /* The distance in F26dot6 format. */
- /* */
- static FT_F26Dot6
- Dual_Project( TT_ExecContext exc,
- FT_Pos dx,
- FT_Pos dy )
- {
- return TT_DotFix14( dx, dy,
- exc->GS.dualVector.x,
- exc->GS.dualVector.y );
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Project_x */
- /* */
- /* <Description> */
- /* Computes the projection of the vector given by (v2-v1) along the */
- /* horizontal axis. */
- /* */
- /* <Input> */
- /* v1 :: First input vector. */
- /* v2 :: Second input vector. */
- /* */
- /* <Return> */
- /* The distance in F26dot6 format. */
- /* */
- static FT_F26Dot6
- Project_x( TT_ExecContext exc,
- FT_Pos dx,
- FT_Pos dy )
- {
- FT_UNUSED( exc );
- FT_UNUSED( dy );
-
- return dx;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Project_y */
- /* */
- /* <Description> */
- /* Computes the projection of the vector given by (v2-v1) along the */
- /* vertical axis. */
- /* */
- /* <Input> */
- /* v1 :: First input vector. */
- /* v2 :: Second input vector. */
- /* */
- /* <Return> */
- /* The distance in F26dot6 format. */
- /* */
- static FT_F26Dot6
- Project_y( TT_ExecContext exc,
- FT_Pos dx,
- FT_Pos dy )
- {
- FT_UNUSED( exc );
- FT_UNUSED( dx );
-
- return dy;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Compute_Funcs */
- /* */
- /* <Description> */
- /* Computes the projection and movement function pointers according */
- /* to the current graphics state. */
- /* */
- static void
- Compute_Funcs( TT_ExecContext exc )
- {
- if ( exc->GS.freeVector.x == 0x4000 )
- exc->F_dot_P = exc->GS.projVector.x;
- else if ( exc->GS.freeVector.y == 0x4000 )
- exc->F_dot_P = exc->GS.projVector.y;
- else
- exc->F_dot_P =
- ( (FT_Long)exc->GS.projVector.x * exc->GS.freeVector.x +
- (FT_Long)exc->GS.projVector.y * exc->GS.freeVector.y ) >> 14;
-
- if ( exc->GS.projVector.x == 0x4000 )
- exc->func_project = (TT_Project_Func)Project_x;
- else if ( exc->GS.projVector.y == 0x4000 )
- exc->func_project = (TT_Project_Func)Project_y;
- else
- exc->func_project = (TT_Project_Func)Project;
-
- if ( exc->GS.dualVector.x == 0x4000 )
- exc->func_dualproj = (TT_Project_Func)Project_x;
- else if ( exc->GS.dualVector.y == 0x4000 )
- exc->func_dualproj = (TT_Project_Func)Project_y;
- else
- exc->func_dualproj = (TT_Project_Func)Dual_Project;
-
- exc->func_move = (TT_Move_Func)Direct_Move;
- exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig;
-
- if ( exc->F_dot_P == 0x4000L )
- {
- if ( exc->GS.freeVector.x == 0x4000 )
- {
- exc->func_move = (TT_Move_Func)Direct_Move_X;
- exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig_X;
- }
- else if ( exc->GS.freeVector.y == 0x4000 )
- {
- exc->func_move = (TT_Move_Func)Direct_Move_Y;
- exc->func_move_orig = (TT_Move_Func)Direct_Move_Orig_Y;
- }
- }
-
- /* at small sizes, F_dot_P can become too small, resulting */
- /* in overflows and `spikes' in a number of glyphs like `w'. */
-
- if ( FT_ABS( exc->F_dot_P ) < 0x400L )
- exc->F_dot_P = 0x4000L;
-
- /* Disable cached aspect ratio */
- exc->tt_metrics.ratio = 0;
- }
-
-
- /*************************************************************************/
- /* */
- /* <Function> */
- /* Normalize */
- /* */
- /* <Description> */
- /* Norms a vector. */
- /* */
- /* <Input> */
- /* Vx :: The horizontal input vector coordinate. */
- /* Vy :: The vertical input vector coordinate. */
- /* */
- /* <Output> */
- /* R :: The normed unit vector. */
- /* */
- /* <Return> */
- /* Returns FAILURE if a vector parameter is zero. */
- /* */
- /* <Note> */
- /* In case Vx and Vy are both zero, `Normalize' returns SUCCESS, and */
- /* R is undefined. */
- /* */
- static FT_Bool
- Normalize( FT_F26Dot6 Vx,
- FT_F26Dot6 Vy,
- FT_UnitVector* R )
- {
- FT_Vector V;
-
-
- if ( Vx == 0 && Vy == 0 )
- {
- /* XXX: UNDOCUMENTED! It seems that it is possible to try */
- /* to normalize the vector (0,0). Return immediately. */
- return SUCCESS;
- }
-
- V.x = Vx;
- V.y = Vy;
-
- FT_Vector_NormLen( &V );
-
- R->x = (FT_F2Dot14)( V.x / 4 );
- R->y = (FT_F2Dot14)( V.y / 4 );
-
- return SUCCESS;
- }
-
-
- /*************************************************************************/
- /* */
- /* Here we start with the implementation of the various opcodes. */
- /* */
- /*************************************************************************/
-
-
-#define ARRAY_BOUND_ERROR \
- do \
- { \
- exc->error = FT_THROW( Invalid_Reference ); \
- return; \
- } while (0)
-
-
- /*************************************************************************/
- /* */
- /* MPPEM[]: Measure Pixel Per EM */
- /* Opcode range: 0x4B */
- /* Stack: --> Euint16 */
- /* */
- static void
- Ins_MPPEM( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = exc->func_cur_ppem( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* MPS[]: Measure Point Size */
- /* Opcode range: 0x4C */
- /* Stack: --> Euint16 */
- /* */
- static void
- Ins_MPS( TT_ExecContext exc,
- FT_Long* args )
- {
- /* Note: The point size should be irrelevant in a given font program; */
- /* we thus decide to return only the PPEM value. */
-#if 0
- args[0] = exc->metrics.pointSize;
-#else
- args[0] = exc->func_cur_ppem( exc );
-#endif
- }
-
-
- /*************************************************************************/
- /* */
- /* DUP[]: DUPlicate the stack's top element */
- /* Opcode range: 0x20 */
- /* Stack: StkElt --> StkElt StkElt */
- /* */
- static void
- Ins_DUP( FT_Long* args )
- {
- args[1] = args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* POP[]: POP the stack's top element */
- /* Opcode range: 0x21 */
- /* Stack: StkElt --> */
- /* */
- static void
- Ins_POP( void )
- {
- /* nothing to do */
- }
-
-
- /*************************************************************************/
- /* */
- /* CLEAR[]: CLEAR the entire stack */
- /* Opcode range: 0x22 */
- /* Stack: StkElt... --> */
- /* */
- static void
- Ins_CLEAR( TT_ExecContext exc )
- {
- exc->new_top = 0;
- }
-
-
- /*************************************************************************/
- /* */
- /* SWAP[]: SWAP the stack's top two elements */
- /* Opcode range: 0x23 */
- /* Stack: 2 * StkElt --> 2 * StkElt */
- /* */
- static void
- Ins_SWAP( FT_Long* args )
- {
- FT_Long L;
-
-
- L = args[0];
- args[0] = args[1];
- args[1] = L;
- }
-
-
- /*************************************************************************/
- /* */
- /* DEPTH[]: return the stack DEPTH */
- /* Opcode range: 0x24 */
- /* Stack: --> uint32 */
- /* */
- static void
- Ins_DEPTH( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = exc->top;
- }
-
-
- /*************************************************************************/
- /* */
- /* LT[]: Less Than */
- /* Opcode range: 0x50 */
- /* Stack: int32? int32? --> bool */
- /* */
- static void
- Ins_LT( FT_Long* args )
- {
- args[0] = ( args[0] < args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* LTEQ[]: Less Than or EQual */
- /* Opcode range: 0x51 */
- /* Stack: int32? int32? --> bool */
- /* */
- static void
- Ins_LTEQ( FT_Long* args )
- {
- args[0] = ( args[0] <= args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* GT[]: Greater Than */
- /* Opcode range: 0x52 */
- /* Stack: int32? int32? --> bool */
- /* */
- static void
- Ins_GT( FT_Long* args )
- {
- args[0] = ( args[0] > args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* GTEQ[]: Greater Than or EQual */
- /* Opcode range: 0x53 */
- /* Stack: int32? int32? --> bool */
- /* */
- static void
- Ins_GTEQ( FT_Long* args )
- {
- args[0] = ( args[0] >= args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* EQ[]: EQual */
- /* Opcode range: 0x54 */
- /* Stack: StkElt StkElt --> bool */
- /* */
- static void
- Ins_EQ( FT_Long* args )
- {
- args[0] = ( args[0] == args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* NEQ[]: Not EQual */
- /* Opcode range: 0x55 */
- /* Stack: StkElt StkElt --> bool */
- /* */
- static void
- Ins_NEQ( FT_Long* args )
- {
- args[0] = ( args[0] != args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* ODD[]: Is ODD */
- /* Opcode range: 0x56 */
- /* Stack: f26.6 --> bool */
- /* */
- static void
- Ins_ODD( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = ( ( exc->func_round( exc, args[0], 0 ) & 127 ) == 64 );
- }
-
-
- /*************************************************************************/
- /* */
- /* EVEN[]: Is EVEN */
- /* Opcode range: 0x57 */
- /* Stack: f26.6 --> bool */
- /* */
- static void
- Ins_EVEN( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = ( ( exc->func_round( exc, args[0], 0 ) & 127 ) == 0 );
- }
-
-
- /*************************************************************************/
- /* */
- /* AND[]: logical AND */
- /* Opcode range: 0x5A */
- /* Stack: uint32 uint32 --> uint32 */
- /* */
- static void
- Ins_AND( FT_Long* args )
- {
- args[0] = ( args[0] && args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* OR[]: logical OR */
- /* Opcode range: 0x5B */
- /* Stack: uint32 uint32 --> uint32 */
- /* */
- static void
- Ins_OR( FT_Long* args )
- {
- args[0] = ( args[0] || args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* NOT[]: logical NOT */
- /* Opcode range: 0x5C */
- /* Stack: StkElt --> uint32 */
- /* */
- static void
- Ins_NOT( FT_Long* args )
- {
- args[0] = !args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* ADD[]: ADD */
- /* Opcode range: 0x60 */
- /* Stack: f26.6 f26.6 --> f26.6 */
- /* */
- static void
- Ins_ADD( FT_Long* args )
- {
- args[0] += args[1];
- }
-
-
- /*************************************************************************/
- /* */
- /* SUB[]: SUBtract */
- /* Opcode range: 0x61 */
- /* Stack: f26.6 f26.6 --> f26.6 */
- /* */
- static void
- Ins_SUB( FT_Long* args )
- {
- args[0] -= args[1];
- }
-
-
- /*************************************************************************/
- /* */
- /* DIV[]: DIVide */
- /* Opcode range: 0x62 */
- /* Stack: f26.6 f26.6 --> f26.6 */
- /* */
- static void
- Ins_DIV( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[1] == 0 )
- exc->error = FT_THROW( Divide_By_Zero );
- else
- args[0] = FT_MulDiv_No_Round( args[0], 64L, args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* MUL[]: MULtiply */
- /* Opcode range: 0x63 */
- /* Stack: f26.6 f26.6 --> f26.6 */
- /* */
- static void
- Ins_MUL( FT_Long* args )
- {
- args[0] = FT_MulDiv( args[0], args[1], 64L );
- }
-
-
- /*************************************************************************/
- /* */
- /* ABS[]: ABSolute value */
- /* Opcode range: 0x64 */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_ABS( FT_Long* args )
- {
- args[0] = FT_ABS( args[0] );
- }
-
-
- /*************************************************************************/
- /* */
- /* NEG[]: NEGate */
- /* Opcode range: 0x65 */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_NEG( FT_Long* args )
- {
- args[0] = -args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* FLOOR[]: FLOOR */
- /* Opcode range: 0x66 */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_FLOOR( FT_Long* args )
- {
- args[0] = FT_PIX_FLOOR( args[0] );
- }
-
-
- /*************************************************************************/
- /* */
- /* CEILING[]: CEILING */
- /* Opcode range: 0x67 */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_CEILING( FT_Long* args )
- {
- args[0] = FT_PIX_CEIL( args[0] );
- }
-
-
- /*************************************************************************/
- /* */
- /* RS[]: Read Store */
- /* Opcode range: 0x43 */
- /* Stack: uint32 --> uint32 */
- /* */
- static void
- Ins_RS( TT_ExecContext exc,
- FT_Long* args )
- {
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
-
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->storeSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- else
- args[0] = 0;
- }
- else
- {
- /* subpixel hinting - avoid Typeman Dstroke and */
- /* IStroke and Vacuform rounds */
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- ( ( I == 24 &&
- ( exc->face->sph_found_func_flags &
- ( SPH_FDEF_SPACING_1 |
- SPH_FDEF_SPACING_2 ) ) ) ||
- ( I == 22 &&
- ( exc->sph_in_func_flags &
- SPH_FDEF_TYPEMAN_STROKES ) ) ||
- ( I == 8 &&
- ( exc->face->sph_found_func_flags &
- SPH_FDEF_VACUFORM_ROUND_1 ) &&
- exc->iup_called ) ) )
- args[0] = 0;
- else
- args[0] = exc->storage[I];
- }
-
-#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->storeSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- else
- args[0] = 0;
- }
- else
- args[0] = exc->storage[I];
-
-#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- }
-
-
- /*************************************************************************/
- /* */
- /* WS[]: Write Store */
- /* Opcode range: 0x42 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_WS( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->storeSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- }
- else
- exc->storage[I] = args[1];
- }
-
-
- /*************************************************************************/
- /* */
- /* WCVTP[]: Write CVT in Pixel units */
- /* Opcode range: 0x44 */
- /* Stack: f26.6 uint32 --> */
- /* */
- static void
- Ins_WCVTP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->cvtSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- }
- else
- exc->func_write_cvt( exc, I, args[1] );
- }
-
-
- /*************************************************************************/
- /* */
- /* WCVTF[]: Write CVT in Funits */
- /* Opcode range: 0x70 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_WCVTF( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->cvtSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- }
- else
- exc->cvt[I] = FT_MulFix( args[1], exc->tt_metrics.scale );
- }
-
-
- /*************************************************************************/
- /* */
- /* RCVT[]: Read CVT */
- /* Opcode range: 0x45 */
- /* Stack: uint32 --> f26.6 */
- /* */
- static void
- Ins_RCVT( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong I = (FT_ULong)args[0];
-
-
- if ( BOUNDSL( I, exc->cvtSize ) )
- {
- if ( exc->pedantic_hinting )
- ARRAY_BOUND_ERROR;
- else
- args[0] = 0;
- }
- else
- args[0] = exc->func_read_cvt( exc, I );
- }
-
-
- /*************************************************************************/
- /* */
- /* AA[]: Adjust Angle */
- /* Opcode range: 0x7F */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_AA( void )
- {
- /* intentionally no longer supported */
- }
-
-
- /*************************************************************************/
- /* */
- /* DEBUG[]: DEBUG. Unsupported. */
- /* Opcode range: 0x4F */
- /* Stack: uint32 --> */
- /* */
- /* Note: The original instruction pops a value from the stack. */
- /* */
- static void
- Ins_DEBUG( TT_ExecContext exc )
- {
- exc->error = FT_THROW( Debug_OpCode );
- }
-
-
- /*************************************************************************/
- /* */
- /* ROUND[ab]: ROUND value */
- /* Opcode range: 0x68-0x6B */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_ROUND( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = exc->func_round(
- exc,
- args[0],
- exc->tt_metrics.compensations[exc->opcode - 0x68] );
- }
-
-
- /*************************************************************************/
- /* */
- /* NROUND[ab]: No ROUNDing of value */
- /* Opcode range: 0x6C-0x6F */
- /* Stack: f26.6 --> f26.6 */
- /* */
- static void
- Ins_NROUND( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = Round_None(
- exc,
- args[0],
- exc->tt_metrics.compensations[exc->opcode - 0x6C] );
- }
-
-
- /*************************************************************************/
- /* */
- /* MAX[]: MAXimum */
- /* Opcode range: 0x68 */
- /* Stack: int32? int32? --> int32 */
- /* */
- static void
- Ins_MAX( FT_Long* args )
- {
- if ( args[1] > args[0] )
- args[0] = args[1];
- }
-
-
- /*************************************************************************/
- /* */
- /* MIN[]: MINimum */
- /* Opcode range: 0x69 */
- /* Stack: int32? int32? --> int32 */
- /* */
- static void
- Ins_MIN( FT_Long* args )
- {
- if ( args[1] < args[0] )
- args[0] = args[1];
- }
-
-
- /*************************************************************************/
- /* */
- /* MINDEX[]: Move INDEXed element */
- /* Opcode range: 0x26 */
- /* Stack: int32? --> StkElt */
- /* */
- static void
- Ins_MINDEX( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Long L, K;
-
-
- L = args[0];
-
- if ( L <= 0 || L > exc->args )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- }
- else
- {
- K = exc->stack[exc->args - L];
-
- FT_ARRAY_MOVE( &exc->stack[exc->args - L ],
- &exc->stack[exc->args - L + 1],
- ( L - 1 ) );
-
- exc->stack[exc->args - 1] = K;
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* CINDEX[]: Copy INDEXed element */
- /* Opcode range: 0x25 */
- /* Stack: int32 --> StkElt */
- /* */
- static void
- Ins_CINDEX( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Long L;
-
-
- L = args[0];
-
- if ( L <= 0 || L > exc->args )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- args[0] = 0;
- }
- else
- args[0] = exc->stack[exc->args - L];
- }
-
-
- /*************************************************************************/
- /* */
- /* ROLL[]: ROLL top three elements */
- /* Opcode range: 0x8A */
- /* Stack: 3 * StkElt --> 3 * StkElt */
- /* */
- static void
- Ins_ROLL( FT_Long* args )
- {
- FT_Long A, B, C;
-
-
- A = args[2];
- B = args[1];
- C = args[0];
-
- args[2] = C;
- args[1] = A;
- args[0] = B;
- }
-
-
- /*************************************************************************/
- /* */
- /* MANAGING THE FLOW OF CONTROL */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* SLOOP[]: Set LOOP variable */
- /* Opcode range: 0x17 */
- /* Stack: int32? --> */
- /* */
- static void
- Ins_SLOOP( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[0] < 0 )
- exc->error = FT_THROW( Bad_Argument );
- else
- exc->GS.loop = args[0];
- }
-
-
- static FT_Bool
- SkipCode( TT_ExecContext exc )
- {
- exc->IP += exc->length;
-
- if ( exc->IP < exc->codeSize )
- {
- exc->opcode = exc->code[exc->IP];
-
- exc->length = opcode_length[exc->opcode];
- if ( exc->length < 0 )
- {
- if ( exc->IP + 1 >= exc->codeSize )
- goto Fail_Overflow;
- exc->length = 2 - exc->length * exc->code[exc->IP + 1];
- }
-
- if ( exc->IP + exc->length <= exc->codeSize )
- return SUCCESS;
- }
-
- Fail_Overflow:
- exc->error = FT_THROW( Code_Overflow );
- return FAILURE;
- }
-
-
- /*************************************************************************/
- /* */
- /* IF[]: IF test */
- /* Opcode range: 0x58 */
- /* Stack: StkElt --> */
- /* */
- static void
- Ins_IF( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Int nIfs;
- FT_Bool Out;
-
-
- if ( args[0] != 0 )
- return;
-
- nIfs = 1;
- Out = 0;
-
- do
- {
- if ( SkipCode( exc ) == FAILURE )
- return;
-
- switch ( exc->opcode )
- {
- case 0x58: /* IF */
- nIfs++;
- break;
-
- case 0x1B: /* ELSE */
- Out = FT_BOOL( nIfs == 1 );
- break;
-
- case 0x59: /* EIF */
- nIfs--;
- Out = FT_BOOL( nIfs == 0 );
- break;
- }
- } while ( Out == 0 );
- }
-
-
- /*************************************************************************/
- /* */
- /* ELSE[]: ELSE */
- /* Opcode range: 0x1B */
- /* Stack: --> */
- /* */
- static void
- Ins_ELSE( TT_ExecContext exc )
- {
- FT_Int nIfs;
-
-
- nIfs = 1;
-
- do
- {
- if ( SkipCode( exc ) == FAILURE )
- return;
-
- switch ( exc->opcode )
- {
- case 0x58: /* IF */
- nIfs++;
- break;
-
- case 0x59: /* EIF */
- nIfs--;
- break;
- }
- } while ( nIfs != 0 );
- }
-
-
- /*************************************************************************/
- /* */
- /* EIF[]: End IF */
- /* Opcode range: 0x59 */
- /* Stack: --> */
- /* */
- static void
- Ins_EIF( void )
- {
- /* nothing to do */
- }
-
-
- /*************************************************************************/
- /* */
- /* JMPR[]: JuMP Relative */
- /* Opcode range: 0x1C */
- /* Stack: int32 --> */
- /* */
- static void
- Ins_JMPR( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[0] == 0 && exc->args == 0 )
- exc->error = FT_THROW( Bad_Argument );
- exc->IP += args[0];
- if ( exc->IP < 0 ||
- ( exc->callTop > 0 &&
- exc->IP > exc->callStack[exc->callTop - 1].Def->end ) )
- exc->error = FT_THROW( Bad_Argument );
- exc->step_ins = FALSE;
- }
-
-
- /*************************************************************************/
- /* */
- /* JROT[]: Jump Relative On True */
- /* Opcode range: 0x78 */
- /* Stack: StkElt int32 --> */
- /* */
- static void
- Ins_JROT( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[1] != 0 )
- Ins_JMPR( exc, args );
- }
-
-
- /*************************************************************************/
- /* */
- /* JROF[]: Jump Relative On False */
- /* Opcode range: 0x79 */
- /* Stack: StkElt int32 --> */
- /* */
- static void
- Ins_JROF( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[1] == 0 )
- Ins_JMPR( exc, args );
- }
-
-
- /*************************************************************************/
- /* */
- /* DEFINING AND USING FUNCTIONS AND INSTRUCTIONS */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* FDEF[]: Function DEFinition */
- /* Opcode range: 0x2C */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_FDEF( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong n;
- TT_DefRecord* rec;
- TT_DefRecord* limit;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* arguments to opcodes are skipped by `SKIP_Code' */
- FT_Byte opcode_pattern[9][12] = {
- /* #0 inline delta function 1 */
- {
- 0x4B, /* PPEM */
- 0x53, /* GTEQ */
- 0x23, /* SWAP */
- 0x4B, /* PPEM */
- 0x51, /* LTEQ */
- 0x5A, /* AND */
- 0x58, /* IF */
- 0x38, /* SHPIX */
- 0x1B, /* ELSE */
- 0x21, /* POP */
- 0x21, /* POP */
- 0x59 /* EIF */
- },
- /* #1 inline delta function 2 */
- {
- 0x4B, /* PPEM */
- 0x54, /* EQ */
- 0x58, /* IF */
- 0x38, /* SHPIX */
- 0x1B, /* ELSE */
- 0x21, /* POP */
- 0x21, /* POP */
- 0x59 /* EIF */
- },
- /* #2 diagonal stroke function */
- {
- 0x20, /* DUP */
- 0x20, /* DUP */
- 0xB0, /* PUSHB_1 */
- /* 1 */
- 0x60, /* ADD */
- 0x46, /* GC_cur */
- 0xB0, /* PUSHB_1 */
- /* 64 */
- 0x23, /* SWAP */
- 0x42 /* WS */
- },
- /* #3 VacuFormRound function */
- {
- 0x45, /* RCVT */
- 0x23, /* SWAP */
- 0x46, /* GC_cur */
- 0x60, /* ADD */
- 0x20, /* DUP */
- 0xB0 /* PUSHB_1 */
- /* 38 */
- },
- /* #4 TTFautohint bytecode (old) */
- {
- 0x20, /* DUP */
- 0x64, /* ABS */
- 0xB0, /* PUSHB_1 */
- /* 32 */
- 0x60, /* ADD */
- 0x66, /* FLOOR */
- 0x23, /* SWAP */
- 0xB0 /* PUSHB_1 */
- },
- /* #5 spacing function 1 */
- {
- 0x01, /* SVTCA_x */
- 0xB0, /* PUSHB_1 */
- /* 24 */
- 0x43, /* RS */
- 0x58 /* IF */
- },
- /* #6 spacing function 2 */
- {
- 0x01, /* SVTCA_x */
- 0x18, /* RTG */
- 0xB0, /* PUSHB_1 */
- /* 24 */
- 0x43, /* RS */
- 0x58 /* IF */
- },
- /* #7 TypeMan Talk DiagEndCtrl function */
- {
- 0x01, /* SVTCA_x */
- 0x20, /* DUP */
- 0xB0, /* PUSHB_1 */
- /* 3 */
- 0x25, /* CINDEX */
- },
- /* #8 TypeMan Talk Align */
- {
- 0x06, /* SPVTL */
- 0x7D, /* RDTG */
- },
- };
- FT_UShort opcode_patterns = 9;
- FT_UShort opcode_pointer[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
- FT_UShort opcode_size[9] = { 12, 8, 8, 6, 7, 4, 5, 4, 2 };
- FT_UShort i;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
-
- /* some font programs are broken enough to redefine functions! */
- /* We will then parse the current table. */
-
- rec = exc->FDefs;
- limit = rec + exc->numFDefs;
- n = (FT_ULong)args[0];
-
- for ( ; rec < limit; rec++ )
- {
- if ( rec->opc == n )
- break;
- }
-
- if ( rec == limit )
- {
- /* check that there is enough room for new functions */
- if ( exc->numFDefs >= exc->maxFDefs )
- {
- exc->error = FT_THROW( Too_Many_Function_Defs );
- return;
- }
- exc->numFDefs++;
- }
-
- /* Although FDEF takes unsigned 32-bit integer, */
- /* func # must be within unsigned 16-bit integer */
- if ( n > 0xFFFFU )
- {
- exc->error = FT_THROW( Too_Many_Function_Defs );
- return;
- }
-
- rec->range = exc->curRange;
- rec->opc = (FT_UInt16)n;
- rec->start = exc->IP + 1;
- rec->active = TRUE;
- rec->inline_delta = FALSE;
- rec->sph_fdef_flags = 0x0000;
-
- if ( n > exc->maxFunc )
- exc->maxFunc = (FT_UInt16)n;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* We don't know for sure these are typeman functions, */
- /* however they are only active when RS 22 is called */
- if ( n >= 64 && n <= 66 )
- rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_STROKES;
-#endif
-
- /* Now skip the whole function definition. */
- /* We don't allow nested IDEFS & FDEFs. */
-
- while ( SkipCode( exc ) == SUCCESS )
- {
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
-
- if ( SUBPIXEL_HINTING )
- {
- for ( i = 0; i < opcode_patterns; i++ )
- {
- if ( opcode_pointer[i] < opcode_size[i] &&
- exc->opcode == opcode_pattern[i][opcode_pointer[i]] )
- {
- opcode_pointer[i] += 1;
-
- if ( opcode_pointer[i] == opcode_size[i] )
- {
- FT_TRACE6(( "sph: Function %d, opcode ptrn: %d, %s %s\n",
- i, n,
- exc->face->root.family_name,
- exc->face->root.style_name ));
-
- switch ( i )
- {
- case 0:
- rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_1;
- exc->face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_1;
- break;
-
- case 1:
- rec->sph_fdef_flags |= SPH_FDEF_INLINE_DELTA_2;
- exc->face->sph_found_func_flags |= SPH_FDEF_INLINE_DELTA_2;
- break;
-
- case 2:
- switch ( n )
- {
- /* needs to be implemented still */
- case 58:
- rec->sph_fdef_flags |= SPH_FDEF_DIAGONAL_STROKE;
- exc->face->sph_found_func_flags |= SPH_FDEF_DIAGONAL_STROKE;
- }
- break;
-
- case 3:
- switch ( n )
- {
- case 0:
- rec->sph_fdef_flags |= SPH_FDEF_VACUFORM_ROUND_1;
- exc->face->sph_found_func_flags |= SPH_FDEF_VACUFORM_ROUND_1;
- }
- break;
-
- case 4:
- /* probably not necessary to detect anymore */
- rec->sph_fdef_flags |= SPH_FDEF_TTFAUTOHINT_1;
- exc->face->sph_found_func_flags |= SPH_FDEF_TTFAUTOHINT_1;
- break;
-
- case 5:
- switch ( n )
- {
- case 0:
- case 1:
- case 2:
- case 4:
- case 7:
- case 8:
- rec->sph_fdef_flags |= SPH_FDEF_SPACING_1;
- exc->face->sph_found_func_flags |= SPH_FDEF_SPACING_1;
- }
- break;
-
- case 6:
- switch ( n )
- {
- case 0:
- case 1:
- case 2:
- case 4:
- case 7:
- case 8:
- rec->sph_fdef_flags |= SPH_FDEF_SPACING_2;
- exc->face->sph_found_func_flags |= SPH_FDEF_SPACING_2;
- }
- break;
-
- case 7:
- rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
- exc->face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
- break;
-
- case 8:
-#if 0
- rec->sph_fdef_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
- exc->face->sph_found_func_flags |= SPH_FDEF_TYPEMAN_DIAGENDCTRL;
-#endif
- break;
- }
- opcode_pointer[i] = 0;
- }
- }
-
- else
- opcode_pointer[i] = 0;
- }
-
- /* Set sph_compatibility_mode only when deltas are detected */
- exc->face->sph_compatibility_mode =
- ( ( exc->face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_1 ) |
- ( exc->face->sph_found_func_flags & SPH_FDEF_INLINE_DELTA_2 ) );
- }
-
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- switch ( exc->opcode )
- {
- case 0x89: /* IDEF */
- case 0x2C: /* FDEF */
- exc->error = FT_THROW( Nested_DEFS );
- return;
-
- case 0x2D: /* ENDF */
- rec->end = exc->IP;
- return;
- }
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* ENDF[]: END Function definition */
- /* Opcode range: 0x2D */
- /* Stack: --> */
- /* */
- static void
- Ins_ENDF( TT_ExecContext exc )
- {
- TT_CallRec* pRec;
-
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- exc->sph_in_func_flags = 0x0000;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- if ( exc->callTop <= 0 ) /* We encountered an ENDF without a call */
- {
- exc->error = FT_THROW( ENDF_In_Exec_Stream );
- return;
- }
-
- exc->callTop--;
-
- pRec = &exc->callStack[exc->callTop];
-
- pRec->Cur_Count--;
-
- exc->step_ins = FALSE;
-
- if ( pRec->Cur_Count > 0 )
- {
- exc->callTop++;
- exc->IP = pRec->Def->start;
- }
- else
- /* Loop through the current function */
- Ins_Goto_CodeRange( exc, pRec->Caller_Range, pRec->Caller_IP );
-
- /* Exit the current call frame. */
-
- /* NOTE: If the last instruction of a program is a */
- /* CALL or LOOPCALL, the return address is */
- /* always out of the code range. This is a */
- /* valid address, and it is why we do not test */
- /* the result of Ins_Goto_CodeRange() here! */
- }
-
-
- /*************************************************************************/
- /* */
- /* CALL[]: CALL function */
- /* Opcode range: 0x2B */
- /* Stack: uint32? --> */
- /* */
- static void
- Ins_CALL( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong F;
- TT_CallRec* pCrec;
- TT_DefRecord* def;
-
-
- /* first of all, check the index */
-
- F = (FT_ULong)args[0];
- if ( BOUNDSL( F, exc->maxFunc + 1 ) )
- goto Fail;
-
- /* Except for some old Apple fonts, all functions in a TrueType */
- /* font are defined in increasing order, starting from 0. This */
- /* means that we normally have */
- /* */
- /* exc->maxFunc+1 == exc->numFDefs */
- /* exc->FDefs[n].opc == n for n in 0..exc->maxFunc */
- /* */
- /* If this isn't true, we need to look up the function table. */
-
- def = exc->FDefs + F;
- if ( exc->maxFunc + 1 != exc->numFDefs || def->opc != F )
- {
- /* look up the FDefs table */
- TT_DefRecord* limit;
-
-
- def = exc->FDefs;
- limit = def + exc->numFDefs;
-
- while ( def < limit && def->opc != F )
- def++;
-
- if ( def == limit )
- goto Fail;
- }
-
- /* check that the function is active */
- if ( !def->active )
- goto Fail;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- ( ( exc->iup_called &&
- ( exc->sph_tweak_flags & SPH_TWEAK_NO_CALL_AFTER_IUP ) ) ||
- ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) ) )
- goto Fail;
- else
- exc->sph_in_func_flags = def->sph_fdef_flags;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- /* check the call stack */
- if ( exc->callTop >= exc->callSize )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- pCrec = exc->callStack + exc->callTop;
-
- pCrec->Caller_Range = exc->curRange;
- pCrec->Caller_IP = exc->IP + 1;
- pCrec->Cur_Count = 1;
- pCrec->Def = def;
-
- exc->callTop++;
-
- Ins_Goto_CodeRange( exc, def->range, def->start );
-
- exc->step_ins = FALSE;
-
- return;
-
- Fail:
- exc->error = FT_THROW( Invalid_Reference );
- }
-
-
- /*************************************************************************/
- /* */
- /* LOOPCALL[]: LOOP and CALL function */
- /* Opcode range: 0x2A */
- /* Stack: uint32? Eint16? --> */
- /* */
- static void
- Ins_LOOPCALL( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong F;
- TT_CallRec* pCrec;
- TT_DefRecord* def;
-
-
- /* first of all, check the index */
- F = (FT_ULong)args[1];
- if ( BOUNDSL( F, exc->maxFunc + 1 ) )
- goto Fail;
-
- /* Except for some old Apple fonts, all functions in a TrueType */
- /* font are defined in increasing order, starting from 0. This */
- /* means that we normally have */
- /* */
- /* exc->maxFunc+1 == exc->numFDefs */
- /* exc->FDefs[n].opc == n for n in 0..exc->maxFunc */
- /* */
- /* If this isn't true, we need to look up the function table. */
-
- def = exc->FDefs + F;
- if ( exc->maxFunc + 1 != exc->numFDefs || def->opc != F )
- {
- /* look up the FDefs table */
- TT_DefRecord* limit;
-
-
- def = exc->FDefs;
- limit = def + exc->numFDefs;
-
- while ( def < limit && def->opc != F )
- def++;
-
- if ( def == limit )
- goto Fail;
- }
-
- /* check that the function is active */
- if ( !def->active )
- goto Fail;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- ( def->sph_fdef_flags & SPH_FDEF_VACUFORM_ROUND_1 ) )
- goto Fail;
- else
- exc->sph_in_func_flags = def->sph_fdef_flags;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- /* check stack */
- if ( exc->callTop >= exc->callSize )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- if ( args[0] > 0 )
- {
- pCrec = exc->callStack + exc->callTop;
-
- pCrec->Caller_Range = exc->curRange;
- pCrec->Caller_IP = exc->IP + 1;
- pCrec->Cur_Count = (FT_Int)args[0];
- pCrec->Def = def;
-
- exc->callTop++;
-
- Ins_Goto_CodeRange( exc, def->range, def->start );
-
- exc->step_ins = FALSE;
- }
-
- return;
-
- Fail:
- exc->error = FT_THROW( Invalid_Reference );
- }
-
-
- /*************************************************************************/
- /* */
- /* IDEF[]: Instruction DEFinition */
- /* Opcode range: 0x89 */
- /* Stack: Eint8 --> */
- /* */
- static void
- Ins_IDEF( TT_ExecContext exc,
- FT_Long* args )
- {
- TT_DefRecord* def;
- TT_DefRecord* limit;
-
-
- /* First of all, look for the same function in our table */
-
- def = exc->IDefs;
- limit = def + exc->numIDefs;
-
- for ( ; def < limit; def++ )
- if ( def->opc == (FT_ULong)args[0] )
- break;
-
- if ( def == limit )
- {
- /* check that there is enough room for a new instruction */
- if ( exc->numIDefs >= exc->maxIDefs )
- {
- exc->error = FT_THROW( Too_Many_Instruction_Defs );
- return;
- }
- exc->numIDefs++;
- }
-
- /* opcode must be unsigned 8-bit integer */
- if ( 0 > args[0] || args[0] > 0x00FF )
- {
- exc->error = FT_THROW( Too_Many_Instruction_Defs );
- return;
- }
-
- def->opc = (FT_Byte)args[0];
- def->start = exc->IP + 1;
- def->range = exc->curRange;
- def->active = TRUE;
-
- if ( (FT_ULong)args[0] > exc->maxIns )
- exc->maxIns = (FT_Byte)args[0];
-
- /* Now skip the whole function definition. */
- /* We don't allow nested IDEFs & FDEFs. */
-
- while ( SkipCode( exc ) == SUCCESS )
- {
- switch ( exc->opcode )
- {
- case 0x89: /* IDEF */
- case 0x2C: /* FDEF */
- exc->error = FT_THROW( Nested_DEFS );
- return;
- case 0x2D: /* ENDF */
- return;
- }
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* PUSHING DATA ONTO THE INTERPRETER STACK */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* NPUSHB[]: PUSH N Bytes */
- /* Opcode range: 0x40 */
- /* Stack: --> uint32... */
- /* */
- static void
- Ins_NPUSHB( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort L, K;
-
-
- L = (FT_UShort)exc->code[exc->IP + 1];
-
- if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- for ( K = 1; K <= L; K++ )
- args[K - 1] = exc->code[exc->IP + K + 1];
-
- exc->new_top += L;
- }
-
-
- /*************************************************************************/
- /* */
- /* NPUSHW[]: PUSH N Words */
- /* Opcode range: 0x41 */
- /* Stack: --> int32... */
- /* */
- static void
- Ins_NPUSHW( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort L, K;
-
-
- L = (FT_UShort)exc->code[exc->IP + 1];
-
- if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- exc->IP += 2;
-
- for ( K = 0; K < L; K++ )
- args[K] = GetShortIns( exc );
-
- exc->step_ins = FALSE;
- exc->new_top += L;
- }
-
-
- /*************************************************************************/
- /* */
- /* PUSHB[abc]: PUSH Bytes */
- /* Opcode range: 0xB0-0xB7 */
- /* Stack: --> uint32... */
- /* */
- static void
- Ins_PUSHB( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort L, K;
-
-
- L = (FT_UShort)( exc->opcode - 0xB0 + 1 );
-
- if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- for ( K = 1; K <= L; K++ )
- args[K - 1] = exc->code[exc->IP + K];
- }
-
-
- /*************************************************************************/
- /* */
- /* PUSHW[abc]: PUSH Words */
- /* Opcode range: 0xB8-0xBF */
- /* Stack: --> int32... */
- /* */
- static void
- Ins_PUSHW( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort L, K;
-
-
- L = (FT_UShort)( exc->opcode - 0xB8 + 1 );
-
- if ( BOUNDS( L, exc->stackSize + 1 - exc->top ) )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- exc->IP++;
-
- for ( K = 0; K < L; K++ )
- args[K] = GetShortIns( exc );
-
- exc->step_ins = FALSE;
- }
-
-
- /*************************************************************************/
- /* */
- /* MANAGING THE GRAPHICS STATE */
- /* */
- /*************************************************************************/
-
-
- static FT_Bool
- Ins_SxVTL( TT_ExecContext exc,
- FT_UShort aIdx1,
- FT_UShort aIdx2,
- FT_UnitVector* Vec )
- {
- FT_Long A, B, C;
- FT_Vector* p1;
- FT_Vector* p2;
-
- FT_Byte opcode = exc->opcode;
-
-
- if ( BOUNDS( aIdx1, exc->zp2.n_points ) ||
- BOUNDS( aIdx2, exc->zp1.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return FAILURE;
- }
-
- p1 = exc->zp1.cur + aIdx2;
- p2 = exc->zp2.cur + aIdx1;
-
- A = p1->x - p2->x;
- B = p1->y - p2->y;
-
- /* If p1 == p2, SPvTL and SFvTL behave the same as */
- /* SPvTCA[X] and SFvTCA[X], respectively. */
- /* */
- /* Confirmed by Greg Hitchcock. */
-
- if ( A == 0 && B == 0 )
- {
- A = 0x4000;
- opcode = 0;
- }
-
- if ( ( opcode & 1 ) != 0 )
- {
- C = B; /* counter clockwise rotation */
- B = A;
- A = -C;
- }
-
- Normalize( A, B, Vec );
-
- return SUCCESS;
- }
-
-
- /*************************************************************************/
- /* */
- /* SVTCA[a]: Set (F and P) Vectors to Coordinate Axis */
- /* Opcode range: 0x00-0x01 */
- /* Stack: --> */
- /* */
- /* SPvTCA[a]: Set PVector to Coordinate Axis */
- /* Opcode range: 0x02-0x03 */
- /* Stack: --> */
- /* */
- /* SFvTCA[a]: Set FVector to Coordinate Axis */
- /* Opcode range: 0x04-0x05 */
- /* Stack: --> */
- /* */
- static void
- Ins_SxyTCA( TT_ExecContext exc )
- {
- FT_Short AA, BB;
-
- FT_Byte opcode = exc->opcode;
-
-
- AA = (FT_Short)( ( opcode & 1 ) << 14 );
- BB = (FT_Short)( AA ^ 0x4000 );
-
- if ( opcode < 4 )
- {
- exc->GS.projVector.x = AA;
- exc->GS.projVector.y = BB;
-
- exc->GS.dualVector.x = AA;
- exc->GS.dualVector.y = BB;
- }
-
- if ( ( opcode & 2 ) == 0 )
- {
- exc->GS.freeVector.x = AA;
- exc->GS.freeVector.y = BB;
- }
-
- Compute_Funcs( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* SPvTL[a]: Set PVector To Line */
- /* Opcode range: 0x06-0x07 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_SPVTL( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( Ins_SxVTL( exc,
- (FT_UShort)args[1],
- (FT_UShort)args[0],
- &exc->GS.projVector ) == SUCCESS )
- {
- exc->GS.dualVector = exc->GS.projVector;
- Compute_Funcs( exc );
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* SFvTL[a]: Set FVector To Line */
- /* Opcode range: 0x08-0x09 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_SFVTL( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( Ins_SxVTL( exc,
- (FT_UShort)args[1],
- (FT_UShort)args[0],
- &exc->GS.freeVector ) == SUCCESS )
- {
- Compute_Funcs( exc );
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* SFvTPv[]: Set FVector To PVector */
- /* Opcode range: 0x0E */
- /* Stack: --> */
- /* */
- static void
- Ins_SFVTPV( TT_ExecContext exc )
- {
- exc->GS.freeVector = exc->GS.projVector;
- Compute_Funcs( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* SPvFS[]: Set PVector From Stack */
- /* Opcode range: 0x0A */
- /* Stack: f2.14 f2.14 --> */
- /* */
- static void
- Ins_SPVFS( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Short S;
- FT_Long X, Y;
-
-
- /* Only use low 16bits, then sign extend */
- S = (FT_Short)args[1];
- Y = (FT_Long)S;
- S = (FT_Short)args[0];
- X = (FT_Long)S;
-
- Normalize( X, Y, &exc->GS.projVector );
-
- exc->GS.dualVector = exc->GS.projVector;
- Compute_Funcs( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* SFvFS[]: Set FVector From Stack */
- /* Opcode range: 0x0B */
- /* Stack: f2.14 f2.14 --> */
- /* */
- static void
- Ins_SFVFS( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Short S;
- FT_Long X, Y;
-
-
- /* Only use low 16bits, then sign extend */
- S = (FT_Short)args[1];
- Y = (FT_Long)S;
- S = (FT_Short)args[0];
- X = S;
-
- Normalize( X, Y, &exc->GS.freeVector );
- Compute_Funcs( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* GPv[]: Get Projection Vector */
- /* Opcode range: 0x0C */
- /* Stack: ef2.14 --> ef2.14 */
- /* */
- static void
- Ins_GPV( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = exc->GS.projVector.x;
- args[1] = exc->GS.projVector.y;
- }
-
-
- /*************************************************************************/
- /* */
- /* GFv[]: Get Freedom Vector */
- /* Opcode range: 0x0D */
- /* Stack: ef2.14 --> ef2.14 */
- /* */
- static void
- Ins_GFV( TT_ExecContext exc,
- FT_Long* args )
- {
- args[0] = exc->GS.freeVector.x;
- args[1] = exc->GS.freeVector.y;
- }
-
-
- /*************************************************************************/
- /* */
- /* SRP0[]: Set Reference Point 0 */
- /* Opcode range: 0x10 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SRP0( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.rp0 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SRP1[]: Set Reference Point 1 */
- /* Opcode range: 0x11 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SRP1( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.rp1 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SRP2[]: Set Reference Point 2 */
- /* Opcode range: 0x12 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SRP2( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.rp2 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SMD[]: Set Minimum Distance */
- /* Opcode range: 0x1A */
- /* Stack: f26.6 --> */
- /* */
- static void
- Ins_SMD( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.minimum_distance = args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SCVTCI[]: Set Control Value Table Cut In */
- /* Opcode range: 0x1D */
- /* Stack: f26.6 --> */
- /* */
- static void
- Ins_SCVTCI( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.control_value_cutin = (FT_F26Dot6)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SSWCI[]: Set Single Width Cut In */
- /* Opcode range: 0x1E */
- /* Stack: f26.6 --> */
- /* */
- static void
- Ins_SSWCI( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.single_width_cutin = (FT_F26Dot6)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SSW[]: Set Single Width */
- /* Opcode range: 0x1F */
- /* Stack: int32? --> */
- /* */
- static void
- Ins_SSW( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.single_width_value = FT_MulFix( args[0],
- exc->tt_metrics.scale );
- }
-
-
- /*************************************************************************/
- /* */
- /* FLIPON[]: Set auto-FLIP to ON */
- /* Opcode range: 0x4D */
- /* Stack: --> */
- /* */
- static void
- Ins_FLIPON( TT_ExecContext exc )
- {
- exc->GS.auto_flip = TRUE;
- }
-
-
- /*************************************************************************/
- /* */
- /* FLIPOFF[]: Set auto-FLIP to OFF */
- /* Opcode range: 0x4E */
- /* Stack: --> */
- /* */
- static void
- Ins_FLIPOFF( TT_ExecContext exc )
- {
- exc->GS.auto_flip = FALSE;
- }
-
-
- /*************************************************************************/
- /* */
- /* SANGW[]: Set ANGle Weight */
- /* Opcode range: 0x7E */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SANGW( void )
- {
- /* instruction not supported anymore */
- }
-
-
- /*************************************************************************/
- /* */
- /* SDB[]: Set Delta Base */
- /* Opcode range: 0x5E */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SDB( TT_ExecContext exc,
- FT_Long* args )
- {
- exc->GS.delta_base = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SDS[]: Set Delta Shift */
- /* Opcode range: 0x5F */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SDS( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( (FT_ULong)args[0] > 6UL )
- exc->error = FT_THROW( Bad_Argument );
- else
- exc->GS.delta_shift = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* RTHG[]: Round To Half Grid */
- /* Opcode range: 0x19 */
- /* Stack: --> */
- /* */
- static void
- Ins_RTHG( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_To_Half_Grid;
- exc->func_round = (TT_Round_Func)Round_To_Half_Grid;
- }
-
-
- /*************************************************************************/
- /* */
- /* RTG[]: Round To Grid */
- /* Opcode range: 0x18 */
- /* Stack: --> */
- /* */
- static void
- Ins_RTG( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_To_Grid;
- exc->func_round = (TT_Round_Func)Round_To_Grid;
- }
-
-
- /*************************************************************************/
- /* RTDG[]: Round To Double Grid */
- /* Opcode range: 0x3D */
- /* Stack: --> */
- /* */
- static void
- Ins_RTDG( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_To_Double_Grid;
- exc->func_round = (TT_Round_Func)Round_To_Double_Grid;
- }
-
-
- /*************************************************************************/
- /* RUTG[]: Round Up To Grid */
- /* Opcode range: 0x7C */
- /* Stack: --> */
- /* */
- static void
- Ins_RUTG( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_Up_To_Grid;
- exc->func_round = (TT_Round_Func)Round_Up_To_Grid;
- }
-
-
- /*************************************************************************/
- /* */
- /* RDTG[]: Round Down To Grid */
- /* Opcode range: 0x7D */
- /* Stack: --> */
- /* */
- static void
- Ins_RDTG( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_Down_To_Grid;
- exc->func_round = (TT_Round_Func)Round_Down_To_Grid;
- }
-
-
- /*************************************************************************/
- /* */
- /* ROFF[]: Round OFF */
- /* Opcode range: 0x7A */
- /* Stack: --> */
- /* */
- static void
- Ins_ROFF( TT_ExecContext exc )
- {
- exc->GS.round_state = TT_Round_Off;
- exc->func_round = (TT_Round_Func)Round_None;
- }
-
-
- /*************************************************************************/
- /* */
- /* SROUND[]: Super ROUND */
- /* Opcode range: 0x76 */
- /* Stack: Eint8 --> */
- /* */
- static void
- Ins_SROUND( TT_ExecContext exc,
- FT_Long* args )
- {
- SetSuperRound( exc, 0x4000, args[0] );
-
- exc->GS.round_state = TT_Round_Super;
- exc->func_round = (TT_Round_Func)Round_Super;
- }
-
-
- /*************************************************************************/
- /* */
- /* S45ROUND[]: Super ROUND 45 degrees */
- /* Opcode range: 0x77 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_S45ROUND( TT_ExecContext exc,
- FT_Long* args )
- {
- SetSuperRound( exc, 0x2D41, args[0] );
-
- exc->GS.round_state = TT_Round_Super_45;
- exc->func_round = (TT_Round_Func)Round_Super_45;
- }
-
-
- /*************************************************************************/
- /* */
- /* GC[a]: Get Coordinate projected onto */
- /* Opcode range: 0x46-0x47 */
- /* Stack: uint32 --> f26.6 */
- /* */
- /* XXX: UNDOCUMENTED: Measures from the original glyph must be taken */
- /* along the dual projection vector! */
- /* */
- static void
- Ins_GC( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong L;
- FT_F26Dot6 R;
-
-
- L = (FT_ULong)args[0];
-
- if ( BOUNDSL( L, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- R = 0;
- }
- else
- {
- if ( exc->opcode & 1 )
- R = FAST_DUALPROJ( &exc->zp2.org[L] );
- else
- R = FAST_PROJECT( &exc->zp2.cur[L] );
- }
-
- args[0] = R;
- }
-
-
- /*************************************************************************/
- /* */
- /* SCFS[]: Set Coordinate From Stack */
- /* Opcode range: 0x48 */
- /* Stack: f26.6 uint32 --> */
- /* */
- /* Formula: */
- /* */
- /* OA := OA + ( value - OA.p )/( f.p ) * f */
- /* */
- static void
- Ins_SCFS( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Long K;
- FT_UShort L;
-
-
- L = (FT_UShort)args[0];
-
- if ( BOUNDS( L, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- K = FAST_PROJECT( &exc->zp2.cur[L] );
-
- exc->func_move( exc, &exc->zp2, L, args[1] - K );
-
- /* UNDOCUMENTED! The MS rasterizer does that with */
- /* twilight points (confirmed by Greg Hitchcock) */
- if ( exc->GS.gep2 == 0 )
- exc->zp2.org[L] = exc->zp2.cur[L];
- }
-
-
- /*************************************************************************/
- /* */
- /* MD[a]: Measure Distance */
- /* Opcode range: 0x49-0x4A */
- /* Stack: uint32 uint32 --> f26.6 */
- /* */
- /* XXX: UNDOCUMENTED: Measure taken in the original glyph must be along */
- /* the dual projection vector. */
- /* */
- /* XXX: UNDOCUMENTED: Flag attributes are inverted! */
- /* 0 => measure distance in original outline */
- /* 1 => measure distance in grid-fitted outline */
- /* */
- /* XXX: UNDOCUMENTED: `zp0 - zp1', and not `zp2 - zp1! */
- /* */
- static void
- Ins_MD( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort K, L;
- FT_F26Dot6 D;
-
-
- K = (FT_UShort)args[1];
- L = (FT_UShort)args[0];
-
- if ( BOUNDS( L, exc->zp0.n_points ) ||
- BOUNDS( K, exc->zp1.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- D = 0;
- }
- else
- {
- if ( exc->opcode & 1 )
- D = PROJECT( exc->zp0.cur + L, exc->zp1.cur + K );
- else
- {
- /* XXX: UNDOCUMENTED: twilight zone special case */
-
- if ( exc->GS.gep0 == 0 || exc->GS.gep1 == 0 )
- {
- FT_Vector* vec1 = exc->zp0.org + L;
- FT_Vector* vec2 = exc->zp1.org + K;
-
-
- D = DUALPROJ( vec1, vec2 );
- }
- else
- {
- FT_Vector* vec1 = exc->zp0.orus + L;
- FT_Vector* vec2 = exc->zp1.orus + K;
-
-
- if ( exc->metrics.x_scale == exc->metrics.y_scale )
- {
- /* this should be faster */
- D = DUALPROJ( vec1, vec2 );
- D = FT_MulFix( D, exc->metrics.x_scale );
- }
- else
- {
- FT_Vector vec;
-
-
- vec.x = FT_MulFix( vec1->x - vec2->x, exc->metrics.x_scale );
- vec.y = FT_MulFix( vec1->y - vec2->y, exc->metrics.y_scale );
-
- D = FAST_DUALPROJ( &vec );
- }
- }
- }
- }
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* Disable Type 2 Vacuform Rounds - e.g. Arial Narrow */
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- FT_ABS( D ) == 64 )
- D += 1;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- args[0] = D;
- }
-
-
- /*************************************************************************/
- /* */
- /* SDPvTL[a]: Set Dual PVector to Line */
- /* Opcode range: 0x86-0x87 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_SDPVTL( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Long A, B, C;
- FT_UShort p1, p2; /* was FT_Int in pas type ERROR */
-
- FT_Byte opcode = exc->opcode;
-
-
- p1 = (FT_UShort)args[1];
- p2 = (FT_UShort)args[0];
-
- if ( BOUNDS( p2, exc->zp1.n_points ) ||
- BOUNDS( p1, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- {
- FT_Vector* v1 = exc->zp1.org + p2;
- FT_Vector* v2 = exc->zp2.org + p1;
-
-
- A = v1->x - v2->x;
- B = v1->y - v2->y;
-
- /* If v1 == v2, SDPvTL behaves the same as */
- /* SVTCA[X], respectively. */
- /* */
- /* Confirmed by Greg Hitchcock. */
-
- if ( A == 0 && B == 0 )
- {
- A = 0x4000;
- opcode = 0;
- }
- }
-
- if ( ( opcode & 1 ) != 0 )
- {
- C = B; /* counter clockwise rotation */
- B = A;
- A = -C;
- }
-
- Normalize( A, B, &exc->GS.dualVector );
-
- {
- FT_Vector* v1 = exc->zp1.cur + p2;
- FT_Vector* v2 = exc->zp2.cur + p1;
-
-
- A = v1->x - v2->x;
- B = v1->y - v2->y;
-
- if ( A == 0 && B == 0 )
- {
- A = 0x4000;
- opcode = 0;
- }
- }
-
- if ( ( opcode & 1 ) != 0 )
- {
- C = B; /* counter clockwise rotation */
- B = A;
- A = -C;
- }
-
- Normalize( A, B, &exc->GS.projVector );
- Compute_Funcs( exc );
- }
-
-
- /*************************************************************************/
- /* */
- /* SZP0[]: Set Zone Pointer 0 */
- /* Opcode range: 0x13 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SZP0( TT_ExecContext exc,
- FT_Long* args )
- {
- switch ( (FT_Int)args[0] )
- {
- case 0:
- exc->zp0 = exc->twilight;
- break;
-
- case 1:
- exc->zp0 = exc->pts;
- break;
-
- default:
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- exc->GS.gep0 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SZP1[]: Set Zone Pointer 1 */
- /* Opcode range: 0x14 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SZP1( TT_ExecContext exc,
- FT_Long* args )
- {
- switch ( (FT_Int)args[0] )
- {
- case 0:
- exc->zp1 = exc->twilight;
- break;
-
- case 1:
- exc->zp1 = exc->pts;
- break;
-
- default:
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- exc->GS.gep1 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SZP2[]: Set Zone Pointer 2 */
- /* Opcode range: 0x15 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SZP2( TT_ExecContext exc,
- FT_Long* args )
- {
- switch ( (FT_Int)args[0] )
- {
- case 0:
- exc->zp2 = exc->twilight;
- break;
-
- case 1:
- exc->zp2 = exc->pts;
- break;
-
- default:
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- exc->GS.gep2 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* SZPS[]: Set Zone PointerS */
- /* Opcode range: 0x16 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SZPS( TT_ExecContext exc,
- FT_Long* args )
- {
- switch ( (FT_Int)args[0] )
- {
- case 0:
- exc->zp0 = exc->twilight;
- break;
-
- case 1:
- exc->zp0 = exc->pts;
- break;
-
- default:
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- exc->zp1 = exc->zp0;
- exc->zp2 = exc->zp0;
-
- exc->GS.gep0 = (FT_UShort)args[0];
- exc->GS.gep1 = (FT_UShort)args[0];
- exc->GS.gep2 = (FT_UShort)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* INSTCTRL[]: INSTruction ConTRoL */
- /* Opcode range: 0x8E */
- /* Stack: int32 int32 --> */
- /* */
- static void
- Ins_INSTCTRL( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong K, L, Kf;
-
-
- K = (FT_ULong)args[1];
- L = (FT_ULong)args[0];
-
- /* selector values cannot be `OR'ed; */
- /* they are indices starting with index 1, not flags */
- if ( K < 1 || K > 3 )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- /* convert index to flag value */
- Kf = 1 << ( K - 1 );
-
- if ( L != 0 )
- {
- /* arguments to selectors look like flag values */
- if ( L != Kf )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
-
- exc->GS.instruct_control &= ~(FT_Byte)Kf;
- exc->GS.instruct_control |= (FT_Byte)L;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* INSTCTRL modifying flag 3 also has an effect */
- /* outside of the CVT program */
- if ( K == 3 )
- exc->ignore_x_mode = FT_BOOL( L == 4 );
-#endif
- }
-
-
- /*************************************************************************/
- /* */
- /* SCANCTRL[]: SCAN ConTRoL */
- /* Opcode range: 0x85 */
- /* Stack: uint32? --> */
- /* */
- static void
- Ins_SCANCTRL( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Int A;
-
-
- /* Get Threshold */
- A = (FT_Int)( args[0] & 0xFF );
-
- if ( A == 0xFF )
- {
- exc->GS.scan_control = TRUE;
- return;
- }
- else if ( A == 0 )
- {
- exc->GS.scan_control = FALSE;
- return;
- }
-
- if ( ( args[0] & 0x100 ) != 0 && exc->tt_metrics.ppem <= A )
- exc->GS.scan_control = TRUE;
-
- if ( ( args[0] & 0x200 ) != 0 && exc->tt_metrics.rotated )
- exc->GS.scan_control = TRUE;
-
- if ( ( args[0] & 0x400 ) != 0 && exc->tt_metrics.stretched )
- exc->GS.scan_control = TRUE;
-
- if ( ( args[0] & 0x800 ) != 0 && exc->tt_metrics.ppem > A )
- exc->GS.scan_control = FALSE;
-
- if ( ( args[0] & 0x1000 ) != 0 && exc->tt_metrics.rotated )
- exc->GS.scan_control = FALSE;
-
- if ( ( args[0] & 0x2000 ) != 0 && exc->tt_metrics.stretched )
- exc->GS.scan_control = FALSE;
- }
-
-
- /*************************************************************************/
- /* */
- /* SCANTYPE[]: SCAN TYPE */
- /* Opcode range: 0x8D */
- /* Stack: uint32? --> */
- /* */
- static void
- Ins_SCANTYPE( TT_ExecContext exc,
- FT_Long* args )
- {
- if ( args[0] >= 0 )
- exc->GS.scan_type = (FT_Int)args[0];
- }
-
-
- /*************************************************************************/
- /* */
- /* MANAGING OUTLINES */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* FLIPPT[]: FLIP PoinT */
- /* Opcode range: 0x80 */
- /* Stack: uint32... --> */
- /* */
- static void
- Ins_FLIPPT( TT_ExecContext exc )
- {
- FT_UShort point;
-
-
- if ( exc->top < exc->GS.loop )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Too_Few_Arguments );
- goto Fail;
- }
-
- while ( exc->GS.loop > 0 )
- {
- exc->args--;
-
- point = (FT_UShort)exc->stack[exc->args];
-
- if ( BOUNDS( point, exc->pts.n_points ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
- else
- exc->pts.tags[point] ^= FT_CURVE_TAG_ON;
-
- exc->GS.loop--;
- }
-
- Fail:
- exc->GS.loop = 1;
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* FLIPRGON[]: FLIP RanGe ON */
- /* Opcode range: 0x81 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_FLIPRGON( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort I, K, L;
-
-
- K = (FT_UShort)args[1];
- L = (FT_UShort)args[0];
-
- if ( BOUNDS( K, exc->pts.n_points ) ||
- BOUNDS( L, exc->pts.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- for ( I = L; I <= K; I++ )
- exc->pts.tags[I] |= FT_CURVE_TAG_ON;
- }
-
-
- /*************************************************************************/
- /* */
- /* FLIPRGOFF: FLIP RanGe OFF */
- /* Opcode range: 0x82 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_FLIPRGOFF( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort I, K, L;
-
-
- K = (FT_UShort)args[1];
- L = (FT_UShort)args[0];
-
- if ( BOUNDS( K, exc->pts.n_points ) ||
- BOUNDS( L, exc->pts.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- for ( I = L; I <= K; I++ )
- exc->pts.tags[I] &= ~FT_CURVE_TAG_ON;
- }
-
-
- static FT_Bool
- Compute_Point_Displacement( TT_ExecContext exc,
- FT_F26Dot6* x,
- FT_F26Dot6* y,
- TT_GlyphZone zone,
- FT_UShort* refp )
- {
- TT_GlyphZoneRec zp;
- FT_UShort p;
- FT_F26Dot6 d;
-
-
- if ( exc->opcode & 1 )
- {
- zp = exc->zp0;
- p = exc->GS.rp1;
- }
- else
- {
- zp = exc->zp1;
- p = exc->GS.rp2;
- }
-
- if ( BOUNDS( p, zp.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- *refp = 0;
- return FAILURE;
- }
-
- *zone = zp;
- *refp = p;
-
- d = PROJECT( zp.cur + p, zp.org + p );
-
- *x = FT_MulDiv( d, (FT_Long)exc->GS.freeVector.x, exc->F_dot_P );
- *y = FT_MulDiv( d, (FT_Long)exc->GS.freeVector.y, exc->F_dot_P );
-
- return SUCCESS;
- }
-
-
- static void
- Move_Zp2_Point( TT_ExecContext exc,
- FT_UShort point,
- FT_F26Dot6 dx,
- FT_F26Dot6 dy,
- FT_Bool touch )
- {
- if ( exc->GS.freeVector.x != 0 )
- {
- exc->zp2.cur[point].x += dx;
- if ( touch )
- exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_X;
- }
-
- if ( exc->GS.freeVector.y != 0 )
- {
- exc->zp2.cur[point].y += dy;
- if ( touch )
- exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_Y;
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* SHP[a]: SHift Point by the last point */
- /* Opcode range: 0x32-0x33 */
- /* Stack: uint32... --> */
- /* */
- static void
- Ins_SHP( TT_ExecContext exc )
- {
- TT_GlyphZoneRec zp;
- FT_UShort refp;
-
- FT_F26Dot6 dx, dy;
- FT_UShort point;
-
-
- if ( exc->top < exc->GS.loop )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
- return;
-
- while ( exc->GS.loop > 0 )
- {
- exc->args--;
- point = (FT_UShort)exc->stack[exc->args];
-
- if ( BOUNDS( point, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
- else
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* doesn't follow Cleartype spec but produces better result */
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode )
- Move_Zp2_Point( exc, point, 0, dy, TRUE );
- else
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- Move_Zp2_Point( exc, point, dx, dy, TRUE );
-
- exc->GS.loop--;
- }
-
- Fail:
- exc->GS.loop = 1;
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* SHC[a]: SHift Contour */
- /* Opcode range: 0x34-35 */
- /* Stack: uint32 --> */
- /* */
- /* UNDOCUMENTED: According to Greg Hitchcock, there is one (virtual) */
- /* contour in the twilight zone, namely contour number */
- /* zero which includes all points of it. */
- /* */
- static void
- Ins_SHC( TT_ExecContext exc,
- FT_Long* args )
- {
- TT_GlyphZoneRec zp;
- FT_UShort refp;
- FT_F26Dot6 dx, dy;
-
- FT_Short contour, bounds;
- FT_UShort start, limit, i;
-
-
- contour = (FT_Short)args[0];
- bounds = ( exc->GS.gep2 == 0 ) ? 1 : exc->zp2.n_contours;
-
- if ( BOUNDS( contour, bounds ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
- return;
-
- if ( contour == 0 )
- start = 0;
- else
- start = (FT_UShort)( exc->zp2.contours[contour - 1] + 1 -
- exc->zp2.first_point );
-
- /* we use the number of points if in the twilight zone */
- if ( exc->GS.gep2 == 0 )
- limit = exc->zp2.n_points;
- else
- limit = (FT_UShort)( exc->zp2.contours[contour] -
- exc->zp2.first_point + 1 );
-
- for ( i = start; i < limit; i++ )
- {
- if ( zp.cur != exc->zp2.cur || refp != i )
- Move_Zp2_Point( exc, i, dx, dy, TRUE );
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* SHZ[a]: SHift Zone */
- /* Opcode range: 0x36-37 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_SHZ( TT_ExecContext exc,
- FT_Long* args )
- {
- TT_GlyphZoneRec zp;
- FT_UShort refp;
- FT_F26Dot6 dx,
- dy;
-
- FT_UShort limit, i;
-
-
- if ( BOUNDS( args[0], 2 ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- if ( Compute_Point_Displacement( exc, &dx, &dy, &zp, &refp ) )
- return;
-
- /* XXX: UNDOCUMENTED! SHZ doesn't move the phantom points. */
- /* Twilight zone has no real contours, so use `n_points'. */
- /* Normal zone's `n_points' includes phantoms, so must */
- /* use end of last contour. */
- if ( exc->GS.gep2 == 0 )
- limit = (FT_UShort)exc->zp2.n_points;
- else if ( exc->GS.gep2 == 1 && exc->zp2.n_contours > 0 )
- limit = (FT_UShort)( exc->zp2.contours[exc->zp2.n_contours - 1] + 1 );
- else
- limit = 0;
-
- /* XXX: UNDOCUMENTED! SHZ doesn't touch the points */
- for ( i = 0; i < limit; i++ )
- {
- if ( zp.cur != exc->zp2.cur || refp != i )
- Move_Zp2_Point( exc, i, dx, dy, FALSE );
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* SHPIX[]: SHift points by a PIXel amount */
- /* Opcode range: 0x38 */
- /* Stack: f26.6 uint32... --> */
- /* */
- static void
- Ins_SHPIX( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_F26Dot6 dx, dy;
- FT_UShort point;
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- FT_Int B1, B2;
-#endif
-
-
- if ( exc->top < exc->GS.loop + 1 )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- dx = TT_MulFix14( args[0], exc->GS.freeVector.x );
- dy = TT_MulFix14( args[0], exc->GS.freeVector.y );
-
- while ( exc->GS.loop > 0 )
- {
- exc->args--;
-
- point = (FT_UShort)exc->stack[exc->args];
-
- if ( BOUNDS( point, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
- else
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- {
- /* If not using ignore_x_mode rendering, allow ZP2 move. */
- /* If inline deltas aren't allowed, skip ZP2 move. */
- /* If using ignore_x_mode rendering, allow ZP2 point move if: */
- /* - freedom vector is y and sph_compatibility_mode is off */
- /* - the glyph is composite and the move is in the Y direction */
- /* - the glyph is specifically set to allow SHPIX moves */
- /* - the move is on a previously Y-touched point */
-
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode )
- {
- /* save point for later comparison */
- if ( exc->GS.freeVector.y != 0 )
- B1 = exc->zp2.cur[point].y;
- else
- B1 = exc->zp2.cur[point].x;
-
- if ( !exc->face->sph_compatibility_mode &&
- exc->GS.freeVector.y != 0 )
- {
- Move_Zp2_Point( exc, point, dx, dy, TRUE );
-
- /* save new point */
- if ( exc->GS.freeVector.y != 0 )
- {
- B2 = exc->zp2.cur[point].y;
-
- /* reverse any disallowed moves */
- if ( ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
- ( B1 & 63 ) != 0 &&
- ( B2 & 63 ) != 0 &&
- B1 != B2 )
- Move_Zp2_Point( exc, point, -dx, -dy, TRUE );
- }
- }
- else if ( exc->face->sph_compatibility_mode )
- {
- if ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
- {
- dx = FT_PIX_ROUND( B1 + dx ) - B1;
- dy = FT_PIX_ROUND( B1 + dy ) - B1;
- }
-
- /* skip post-iup deltas */
- if ( exc->iup_called &&
- ( ( exc->sph_in_func_flags & SPH_FDEF_INLINE_DELTA_1 ) ||
- ( exc->sph_in_func_flags & SPH_FDEF_INLINE_DELTA_2 ) ) )
- goto Skip;
-
- if ( !( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) &&
- ( ( exc->is_composite && exc->GS.freeVector.y != 0 ) ||
- ( exc->zp2.tags[point] & FT_CURVE_TAG_TOUCH_Y ) ||
- ( exc->sph_tweak_flags & SPH_TWEAK_DO_SHPIX ) ) )
- Move_Zp2_Point( exc, point, 0, dy, TRUE );
-
- /* save new point */
- if ( exc->GS.freeVector.y != 0 )
- {
- B2 = exc->zp2.cur[point].y;
-
- /* reverse any disallowed moves */
- if ( ( B1 & 63 ) == 0 &&
- ( B2 & 63 ) != 0 &&
- B1 != B2 )
- Move_Zp2_Point( exc, point, 0, -dy, TRUE );
- }
- }
- else if ( exc->sph_in_func_flags & SPH_FDEF_TYPEMAN_DIAGENDCTRL )
- Move_Zp2_Point( exc, point, dx, dy, TRUE );
- }
- else
- Move_Zp2_Point( exc, point, dx, dy, TRUE );
- }
-
- Skip:
-
-#else /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- Move_Zp2_Point( exc, point, dx, dy, TRUE );
-
-#endif /* !TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- exc->GS.loop--;
- }
-
- Fail:
- exc->GS.loop = 1;
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* MSIRP[a]: Move Stack Indirect Relative Position */
- /* Opcode range: 0x3A-0x3B */
- /* Stack: f26.6 uint32 --> */
- /* */
- static void
- Ins_MSIRP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point;
- FT_F26Dot6 distance;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- FT_F26Dot6 control_value_cutin = 0; /* pacify compiler */
-
-
- if ( SUBPIXEL_HINTING )
- {
- control_value_cutin = exc->GS.control_value_cutin;
-
- if ( exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 &&
- !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
- control_value_cutin = 0;
- }
-
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- point = (FT_UShort)args[0];
-
- if ( BOUNDS( point, exc->zp1.n_points ) ||
- BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- /* UNDOCUMENTED! The MS rasterizer does that with */
- /* twilight points (confirmed by Greg Hitchcock) */
- if ( exc->GS.gep1 == 0 )
- {
- exc->zp1.org[point] = exc->zp0.org[exc->GS.rp0];
- exc->func_move_orig( exc, &exc->zp1, point, args[1] );
- exc->zp1.cur[point] = exc->zp1.org[point];
- }
-
- distance = PROJECT( exc->zp1.cur + point, exc->zp0.cur + exc->GS.rp0 );
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* subpixel hinting - make MSIRP respect CVT cut-in; */
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 &&
- FT_ABS( distance - args[1] ) >= control_value_cutin )
- distance = args[1];
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- exc->func_move( exc, &exc->zp1, point, args[1] - distance );
-
- exc->GS.rp1 = exc->GS.rp0;
- exc->GS.rp2 = point;
-
- if ( ( exc->opcode & 1 ) != 0 )
- exc->GS.rp0 = point;
- }
-
-
- /*************************************************************************/
- /* */
- /* MDAP[a]: Move Direct Absolute Point */
- /* Opcode range: 0x2E-0x2F */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_MDAP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point;
- FT_F26Dot6 cur_dist;
- FT_F26Dot6 distance;
-
-
- point = (FT_UShort)args[0];
-
- if ( BOUNDS( point, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- if ( ( exc->opcode & 1 ) != 0 )
- {
- cur_dist = FAST_PROJECT( &exc->zp0.cur[point] );
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 )
- distance = Round_None(
- exc,
- cur_dist,
- exc->tt_metrics.compensations[0] ) - cur_dist;
- else
-#endif
- distance = exc->func_round(
- exc,
- cur_dist,
- exc->tt_metrics.compensations[0] ) - cur_dist;
- }
- else
- distance = 0;
-
- exc->func_move( exc, &exc->zp0, point, distance );
-
- exc->GS.rp0 = point;
- exc->GS.rp1 = point;
- }
-
-
- /*************************************************************************/
- /* */
- /* MIAP[a]: Move Indirect Absolute Point */
- /* Opcode range: 0x3E-0x3F */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_MIAP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong cvtEntry;
- FT_UShort point;
- FT_F26Dot6 distance;
- FT_F26Dot6 org_dist;
- FT_F26Dot6 control_value_cutin;
-
-
- control_value_cutin = exc->GS.control_value_cutin;
- cvtEntry = (FT_ULong)args[1];
- point = (FT_UShort)args[0];
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 &&
- exc->GS.freeVector.y == 0 &&
- !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
- control_value_cutin = 0;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- if ( BOUNDS( point, exc->zp0.n_points ) ||
- BOUNDSL( cvtEntry, exc->cvtSize ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- /* UNDOCUMENTED! */
- /* */
- /* The behaviour of an MIAP instruction is quite different when used */
- /* in the twilight zone. */
- /* */
- /* First, no control value cut-in test is performed as it would fail */
- /* anyway. Second, the original point, i.e. (org_x,org_y) of */
- /* zp0.point, is set to the absolute, unrounded distance found in the */
- /* CVT. */
- /* */
- /* This is used in the CVT programs of the Microsoft fonts Arial, */
- /* Times, etc., in order to re-adjust some key font heights. It */
- /* allows the use of the IP instruction in the twilight zone, which */
- /* otherwise would be invalid according to the specification. */
- /* */
- /* We implement it with a special sequence for the twilight zone. */
- /* This is a bad hack, but it seems to work. */
- /* */
- /* Confirmed by Greg Hitchcock. */
-
- distance = exc->func_read_cvt( exc, cvtEntry );
-
- if ( exc->GS.gep0 == 0 ) /* If in twilight zone */
- {
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* Only adjust if not in sph_compatibility_mode or ignore_x_mode. */
- /* Determined via experimentation and may be incorrect... */
- if ( !SUBPIXEL_HINTING ||
- ( !exc->ignore_x_mode ||
- !exc->face->sph_compatibility_mode ) )
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- exc->zp0.org[point].x = TT_MulFix14( distance,
- exc->GS.freeVector.x );
- exc->zp0.org[point].y = TT_MulFix14( distance,
- exc->GS.freeVector.y ),
- exc->zp0.cur[point] = exc->zp0.org[point];
- }
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- ( exc->sph_tweak_flags & SPH_TWEAK_MIAP_HACK ) &&
- distance > 0 &&
- exc->GS.freeVector.y != 0 )
- distance = 0;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- org_dist = FAST_PROJECT( &exc->zp0.cur[point] );
-
- if ( ( exc->opcode & 1 ) != 0 ) /* rounding and control cut-in flag */
- {
- if ( FT_ABS( distance - org_dist ) > control_value_cutin )
- distance = org_dist;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 )
- distance = Round_None( exc,
- distance,
- exc->tt_metrics.compensations[0] );
- else
-#endif
- distance = exc->func_round( exc,
- distance,
- exc->tt_metrics.compensations[0] );
- }
-
- exc->func_move( exc, &exc->zp0, point, distance - org_dist );
-
- Fail:
- exc->GS.rp0 = point;
- exc->GS.rp1 = point;
- }
-
-
- /*************************************************************************/
- /* */
- /* MDRP[abcde]: Move Direct Relative Point */
- /* Opcode range: 0xC0-0xDF */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_MDRP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point;
- FT_F26Dot6 org_dist, distance, minimum_distance;
-
-
- minimum_distance = exc->GS.minimum_distance;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 &&
- !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
- minimum_distance = 0;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- point = (FT_UShort)args[0];
-
- if ( BOUNDS( point, exc->zp1.n_points ) ||
- BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- /* XXX: Is there some undocumented feature while in the */
- /* twilight zone? */
-
- /* XXX: UNDOCUMENTED: twilight zone special case */
-
- if ( exc->GS.gep0 == 0 || exc->GS.gep1 == 0 )
- {
- FT_Vector* vec1 = &exc->zp1.org[point];
- FT_Vector* vec2 = &exc->zp0.org[exc->GS.rp0];
-
-
- org_dist = DUALPROJ( vec1, vec2 );
- }
- else
- {
- FT_Vector* vec1 = &exc->zp1.orus[point];
- FT_Vector* vec2 = &exc->zp0.orus[exc->GS.rp0];
-
-
- if ( exc->metrics.x_scale == exc->metrics.y_scale )
- {
- /* this should be faster */
- org_dist = DUALPROJ( vec1, vec2 );
- org_dist = FT_MulFix( org_dist, exc->metrics.x_scale );
- }
- else
- {
- FT_Vector vec;
-
-
- vec.x = FT_MulFix( vec1->x - vec2->x, exc->metrics.x_scale );
- vec.y = FT_MulFix( vec1->y - vec2->y, exc->metrics.y_scale );
-
- org_dist = FAST_DUALPROJ( &vec );
- }
- }
-
- /* single width cut-in test */
-
- if ( FT_ABS( org_dist - exc->GS.single_width_value ) <
- exc->GS.single_width_cutin )
- {
- if ( org_dist >= 0 )
- org_dist = exc->GS.single_width_value;
- else
- org_dist = -exc->GS.single_width_value;
- }
-
- /* round flag */
-
- if ( ( exc->opcode & 4 ) != 0 )
- {
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 )
- distance = Round_None(
- exc,
- org_dist,
- exc->tt_metrics.compensations[exc->opcode & 3] );
- else
-#endif
- distance = exc->func_round(
- exc,
- org_dist,
- exc->tt_metrics.compensations[exc->opcode & 3] );
- }
- else
- distance = Round_None(
- exc,
- org_dist,
- exc->tt_metrics.compensations[exc->opcode & 3] );
-
- /* minimum distance flag */
-
- if ( ( exc->opcode & 8 ) != 0 )
- {
- if ( org_dist >= 0 )
- {
- if ( distance < minimum_distance )
- distance = minimum_distance;
- }
- else
- {
- if ( distance > -minimum_distance )
- distance = -minimum_distance;
- }
- }
-
- /* now move the point */
-
- org_dist = PROJECT( exc->zp1.cur + point, exc->zp0.cur + exc->GS.rp0 );
-
- exc->func_move( exc, &exc->zp1, point, distance - org_dist );
-
- Fail:
- exc->GS.rp1 = exc->GS.rp0;
- exc->GS.rp2 = point;
-
- if ( ( exc->opcode & 16 ) != 0 )
- exc->GS.rp0 = point;
- }
-
-
- /*************************************************************************/
- /* */
- /* MIRP[abcde]: Move Indirect Relative Point */
- /* Opcode range: 0xE0-0xFF */
- /* Stack: int32? uint32 --> */
- /* */
- static void
- Ins_MIRP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point;
- FT_ULong cvtEntry;
-
- FT_F26Dot6 cvt_dist,
- distance,
- cur_dist,
- org_dist,
- control_value_cutin,
- minimum_distance;
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- FT_Int B1 = 0; /* pacify compiler */
- FT_Int B2 = 0;
- FT_Bool reverse_move = FALSE;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
-
- minimum_distance = exc->GS.minimum_distance;
- control_value_cutin = exc->GS.control_value_cutin;
- point = (FT_UShort)args[0];
- cvtEntry = (FT_ULong)( args[1] + 1 );
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.x != 0 &&
- !( exc->sph_tweak_flags & SPH_TWEAK_NORMAL_ROUND ) )
- control_value_cutin = minimum_distance = 0;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- /* XXX: UNDOCUMENTED! cvt[-1] = 0 always */
-
- if ( BOUNDS( point, exc->zp1.n_points ) ||
- BOUNDSL( cvtEntry, exc->cvtSize + 1 ) ||
- BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- if ( !cvtEntry )
- cvt_dist = 0;
- else
- cvt_dist = exc->func_read_cvt( exc, cvtEntry - 1 );
-
- /* single width test */
-
- if ( FT_ABS( cvt_dist - exc->GS.single_width_value ) <
- exc->GS.single_width_cutin )
- {
- if ( cvt_dist >= 0 )
- cvt_dist = exc->GS.single_width_value;
- else
- cvt_dist = -exc->GS.single_width_value;
- }
-
- /* UNDOCUMENTED! The MS rasterizer does that with */
- /* twilight points (confirmed by Greg Hitchcock) */
- if ( exc->GS.gep1 == 0 )
- {
- exc->zp1.org[point].x = exc->zp0.org[exc->GS.rp0].x +
- TT_MulFix14( cvt_dist,
- exc->GS.freeVector.x );
- exc->zp1.org[point].y = exc->zp0.org[exc->GS.rp0].y +
- TT_MulFix14( cvt_dist,
- exc->GS.freeVector.y );
- exc->zp1.cur[point] = exc->zp1.org[point];
- }
-
- org_dist = DUALPROJ( &exc->zp1.org[point], &exc->zp0.org[exc->GS.rp0] );
- cur_dist = PROJECT ( &exc->zp1.cur[point], &exc->zp0.cur[exc->GS.rp0] );
-
- /* auto-flip test */
-
- if ( exc->GS.auto_flip )
- {
- if ( ( org_dist ^ cvt_dist ) < 0 )
- cvt_dist = -cvt_dist;
- }
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.freeVector.y != 0 &&
- ( exc->sph_tweak_flags & SPH_TWEAK_TIMES_NEW_ROMAN_HACK ) )
- {
- if ( cur_dist < -64 )
- cvt_dist -= 16;
- else if ( cur_dist > 64 && cur_dist < 84 )
- cvt_dist += 32;
- }
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- /* control value cut-in and round */
-
- if ( ( exc->opcode & 4 ) != 0 )
- {
- /* XXX: UNDOCUMENTED! Only perform cut-in test when both points */
- /* refer to the same zone. */
-
- if ( exc->GS.gep0 == exc->GS.gep1 )
- {
- /* XXX: According to Greg Hitchcock, the following wording is */
- /* the right one: */
- /* */
- /* When the absolute difference between the value in */
- /* the table [CVT] and the measurement directly from */
- /* the outline is _greater_ than the cut_in value, the */
- /* outline measurement is used. */
- /* */
- /* This is from `instgly.doc'. The description in */
- /* `ttinst2.doc', version 1.66, is thus incorrect since */
- /* it implies `>=' instead of `>'. */
-
- if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
- cvt_dist = org_dist;
- }
-
- distance = exc->func_round(
- exc,
- cvt_dist,
- exc->tt_metrics.compensations[exc->opcode & 3] );
- }
- else
- {
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /* do cvt cut-in always in MIRP for sph */
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->GS.gep0 == exc->GS.gep1 )
- {
- if ( FT_ABS( cvt_dist - org_dist ) > control_value_cutin )
- cvt_dist = org_dist;
- }
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- distance = Round_None(
- exc,
- cvt_dist,
- exc->tt_metrics.compensations[exc->opcode & 3] );
- }
-
- /* minimum distance test */
-
- if ( ( exc->opcode & 8 ) != 0 )
- {
- if ( org_dist >= 0 )
- {
- if ( distance < minimum_distance )
- distance = minimum_distance;
- }
- else
- {
- if ( distance > -minimum_distance )
- distance = -minimum_distance;
- }
- }
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING )
- {
- B1 = exc->zp1.cur[point].y;
-
- /* Round moves if necessary */
- if ( exc->ignore_x_mode &&
- exc->GS.freeVector.y != 0 &&
- ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES ) )
- distance = FT_PIX_ROUND( B1 + distance - cur_dist ) - B1 + cur_dist;
-
- if ( exc->ignore_x_mode &&
- exc->GS.freeVector.y != 0 &&
- ( exc->opcode & 16 ) == 0 &&
- ( exc->opcode & 8 ) == 0 &&
- ( exc->sph_tweak_flags & SPH_TWEAK_COURIER_NEW_2_HACK ) )
- distance += 64;
- }
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- exc->func_move( exc, &exc->zp1, point, distance - cur_dist );
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING )
- {
- B2 = exc->zp1.cur[point].y;
-
- /* Reverse move if necessary */
- if ( exc->ignore_x_mode )
- {
- if ( exc->face->sph_compatibility_mode &&
- exc->GS.freeVector.y != 0 &&
- ( B1 & 63 ) == 0 &&
- ( B2 & 63 ) != 0 )
- reverse_move = TRUE;
-
- if ( ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES ) &&
- exc->GS.freeVector.y != 0 &&
- ( B2 & 63 ) != 0 &&
- ( B1 & 63 ) != 0 )
- reverse_move = TRUE;
- }
-
- if ( reverse_move )
- exc->func_move( exc, &exc->zp1, point, -( distance - cur_dist ) );
- }
-
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- Fail:
- exc->GS.rp1 = exc->GS.rp0;
-
- if ( ( exc->opcode & 16 ) != 0 )
- exc->GS.rp0 = point;
-
- exc->GS.rp2 = point;
- }
-
-
- /*************************************************************************/
- /* */
- /* ALIGNRP[]: ALIGN Relative Point */
- /* Opcode range: 0x3C */
- /* Stack: uint32 uint32... --> */
- /* */
- static void
- Ins_ALIGNRP( TT_ExecContext exc )
- {
- FT_UShort point;
- FT_F26Dot6 distance;
-
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->iup_called &&
- ( exc->sph_tweak_flags & SPH_TWEAK_NO_ALIGNRP_AFTER_IUP ) )
- {
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- if ( exc->top < exc->GS.loop ||
- BOUNDS( exc->GS.rp0, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- while ( exc->GS.loop > 0 )
- {
- exc->args--;
-
- point = (FT_UShort)exc->stack[exc->args];
-
- if ( BOUNDS( point, exc->zp1.n_points ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
- else
- {
- distance = PROJECT( exc->zp1.cur + point,
- exc->zp0.cur + exc->GS.rp0 );
-
- exc->func_move( exc, &exc->zp1, point, -distance );
- }
-
- exc->GS.loop--;
- }
-
- Fail:
- exc->GS.loop = 1;
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* ISECT[]: moves point to InterSECTion */
- /* Opcode range: 0x0F */
- /* Stack: 5 * uint32 --> */
- /* */
- static void
- Ins_ISECT( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point,
- a0, a1,
- b0, b1;
-
- FT_F26Dot6 discriminant, dotproduct;
-
- FT_F26Dot6 dx, dy,
- dax, day,
- dbx, dby;
-
- FT_F26Dot6 val;
-
- FT_Vector R;
-
-
- point = (FT_UShort)args[0];
-
- a0 = (FT_UShort)args[1];
- a1 = (FT_UShort)args[2];
- b0 = (FT_UShort)args[3];
- b1 = (FT_UShort)args[4];
-
- if ( BOUNDS( b0, exc->zp0.n_points ) ||
- BOUNDS( b1, exc->zp0.n_points ) ||
- BOUNDS( a0, exc->zp1.n_points ) ||
- BOUNDS( a1, exc->zp1.n_points ) ||
- BOUNDS( point, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- /* Cramer's rule */
-
- dbx = exc->zp0.cur[b1].x - exc->zp0.cur[b0].x;
- dby = exc->zp0.cur[b1].y - exc->zp0.cur[b0].y;
-
- dax = exc->zp1.cur[a1].x - exc->zp1.cur[a0].x;
- day = exc->zp1.cur[a1].y - exc->zp1.cur[a0].y;
-
- dx = exc->zp0.cur[b0].x - exc->zp1.cur[a0].x;
- dy = exc->zp0.cur[b0].y - exc->zp1.cur[a0].y;
-
- discriminant = FT_MulDiv( dax, -dby, 0x40 ) +
- FT_MulDiv( day, dbx, 0x40 );
- dotproduct = FT_MulDiv( dax, dbx, 0x40 ) +
- FT_MulDiv( day, dby, 0x40 );
-
- /* The discriminant above is actually a cross product of vectors */
- /* da and db. Together with the dot product, they can be used as */
- /* surrogates for sine and cosine of the angle between the vectors. */
- /* Indeed, */
- /* dotproduct = |da||db|cos(angle) */
- /* discriminant = |da||db|sin(angle) . */
- /* We use these equations to reject grazing intersections by */
- /* thresholding abs(tan(angle)) at 1/19, corresponding to 3 degrees. */
- if ( 19 * FT_ABS( discriminant ) > FT_ABS( dotproduct ) )
- {
- val = FT_MulDiv( dx, -dby, 0x40 ) + FT_MulDiv( dy, dbx, 0x40 );
-
- R.x = FT_MulDiv( val, dax, discriminant );
- R.y = FT_MulDiv( val, day, discriminant );
-
- exc->zp2.cur[point].x = exc->zp1.cur[a0].x + R.x;
- exc->zp2.cur[point].y = exc->zp1.cur[a0].y + R.y;
- }
- else
- {
- /* else, take the middle of the middles of A and B */
-
- exc->zp2.cur[point].x = ( exc->zp1.cur[a0].x +
- exc->zp1.cur[a1].x +
- exc->zp0.cur[b0].x +
- exc->zp0.cur[b1].x ) / 4;
- exc->zp2.cur[point].y = ( exc->zp1.cur[a0].y +
- exc->zp1.cur[a1].y +
- exc->zp0.cur[b0].y +
- exc->zp0.cur[b1].y ) / 4;
- }
-
- exc->zp2.tags[point] |= FT_CURVE_TAG_TOUCH_BOTH;
- }
-
-
- /*************************************************************************/
- /* */
- /* ALIGNPTS[]: ALIGN PoinTS */
- /* Opcode range: 0x27 */
- /* Stack: uint32 uint32 --> */
- /* */
- static void
- Ins_ALIGNPTS( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort p1, p2;
- FT_F26Dot6 distance;
-
-
- p1 = (FT_UShort)args[0];
- p2 = (FT_UShort)args[1];
-
- if ( BOUNDS( p1, exc->zp1.n_points ) ||
- BOUNDS( p2, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- distance = PROJECT( exc->zp0.cur + p2, exc->zp1.cur + p1 ) / 2;
-
- exc->func_move( exc, &exc->zp1, p1, distance );
- exc->func_move( exc, &exc->zp0, p2, -distance );
- }
-
-
- /*************************************************************************/
- /* */
- /* IP[]: Interpolate Point */
- /* Opcode range: 0x39 */
- /* Stack: uint32... --> */
- /* */
-
- /* SOMETIMES, DUMBER CODE IS BETTER CODE */
-
- static void
- Ins_IP( TT_ExecContext exc )
- {
- FT_F26Dot6 old_range, cur_range;
- FT_Vector* orus_base;
- FT_Vector* cur_base;
- FT_Int twilight;
-
-
- if ( exc->top < exc->GS.loop )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- /*
- * We need to deal in a special way with the twilight zone.
- * Otherwise, by definition, the value of exc->twilight.orus[n] is (0,0),
- * for every n.
- */
- twilight = exc->GS.gep0 == 0 || exc->GS.gep1 == 0 || exc->GS.gep2 == 0;
-
- if ( BOUNDS( exc->GS.rp1, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- goto Fail;
- }
-
- if ( twilight )
- orus_base = &exc->zp0.org[exc->GS.rp1];
- else
- orus_base = &exc->zp0.orus[exc->GS.rp1];
-
- cur_base = &exc->zp0.cur[exc->GS.rp1];
-
- /* XXX: There are some glyphs in some braindead but popular */
- /* fonts out there (e.g. [aeu]grave in monotype.ttf) */
- /* calling IP[] with bad values of rp[12]. */
- /* Do something sane when this odd thing happens. */
- if ( BOUNDS( exc->GS.rp1, exc->zp0.n_points ) ||
- BOUNDS( exc->GS.rp2, exc->zp1.n_points ) )
- {
- old_range = 0;
- cur_range = 0;
- }
- else
- {
- if ( twilight )
- old_range = DUALPROJ( &exc->zp1.org[exc->GS.rp2], orus_base );
- else if ( exc->metrics.x_scale == exc->metrics.y_scale )
- old_range = DUALPROJ( &exc->zp1.orus[exc->GS.rp2], orus_base );
- else
- {
- FT_Vector vec;
-
-
- vec.x = FT_MulFix( exc->zp1.orus[exc->GS.rp2].x - orus_base->x,
- exc->metrics.x_scale );
- vec.y = FT_MulFix( exc->zp1.orus[exc->GS.rp2].y - orus_base->y,
- exc->metrics.y_scale );
-
- old_range = FAST_DUALPROJ( &vec );
- }
-
- cur_range = PROJECT( &exc->zp1.cur[exc->GS.rp2], cur_base );
- }
-
- for ( ; exc->GS.loop > 0; --exc->GS.loop )
- {
- FT_UInt point = (FT_UInt)exc->stack[--exc->args];
- FT_F26Dot6 org_dist, cur_dist, new_dist;
-
-
- /* check point bounds */
- if ( BOUNDS( point, exc->zp2.n_points ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- continue;
- }
-
- if ( twilight )
- org_dist = DUALPROJ( &exc->zp2.org[point], orus_base );
- else if ( exc->metrics.x_scale == exc->metrics.y_scale )
- org_dist = DUALPROJ( &exc->zp2.orus[point], orus_base );
- else
- {
- FT_Vector vec;
-
-
- vec.x = FT_MulFix( exc->zp2.orus[point].x - orus_base->x,
- exc->metrics.x_scale );
- vec.y = FT_MulFix( exc->zp2.orus[point].y - orus_base->y,
- exc->metrics.y_scale );
-
- org_dist = FAST_DUALPROJ( &vec );
- }
-
- cur_dist = PROJECT( &exc->zp2.cur[point], cur_base );
-
- if ( org_dist )
- {
- if ( old_range )
- new_dist = FT_MulDiv( org_dist, cur_range, old_range );
- else
- {
- /* This is the same as what MS does for the invalid case: */
- /* */
- /* delta = (Original_Pt - Original_RP1) - */
- /* (Current_Pt - Current_RP1) ; */
- /* */
- /* In FreeType speak: */
- /* */
- /* delta = org_dist - cur_dist . */
- /* */
- /* We move `point' by `new_dist - cur_dist' after leaving */
- /* this block, thus we have */
- /* */
- /* new_dist - cur_dist = delta , */
- /* new_dist - cur_dist = org_dist - cur_dist , */
- /* new_dist = org_dist . */
-
- new_dist = org_dist;
- }
- }
- else
- new_dist = 0;
-
- exc->func_move( exc,
- &exc->zp2,
- (FT_UShort)point,
- new_dist - cur_dist );
- }
-
- Fail:
- exc->GS.loop = 1;
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* UTP[a]: UnTouch Point */
- /* Opcode range: 0x29 */
- /* Stack: uint32 --> */
- /* */
- static void
- Ins_UTP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_UShort point;
- FT_Byte mask;
-
-
- point = (FT_UShort)args[0];
-
- if ( BOUNDS( point, exc->zp0.n_points ) )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
-
- mask = 0xFF;
-
- if ( exc->GS.freeVector.x != 0 )
- mask &= ~FT_CURVE_TAG_TOUCH_X;
-
- if ( exc->GS.freeVector.y != 0 )
- mask &= ~FT_CURVE_TAG_TOUCH_Y;
-
- exc->zp0.tags[point] &= mask;
- }
-
-
- /* Local variables for Ins_IUP: */
- typedef struct IUP_WorkerRec_
- {
- FT_Vector* orgs; /* original and current coordinate */
- FT_Vector* curs; /* arrays */
- FT_Vector* orus;
- FT_UInt max_points;
-
- } IUP_WorkerRec, *IUP_Worker;
-
-
- static void
- _iup_worker_shift( IUP_Worker worker,
- FT_UInt p1,
- FT_UInt p2,
- FT_UInt p )
- {
- FT_UInt i;
- FT_F26Dot6 dx;
-
-
- dx = worker->curs[p].x - worker->orgs[p].x;
- if ( dx != 0 )
- {
- for ( i = p1; i < p; i++ )
- worker->curs[i].x += dx;
-
- for ( i = p + 1; i <= p2; i++ )
- worker->curs[i].x += dx;
- }
- }
-
-
- static void
- _iup_worker_interpolate( IUP_Worker worker,
- FT_UInt p1,
- FT_UInt p2,
- FT_UInt ref1,
- FT_UInt ref2 )
- {
- FT_UInt i;
- FT_F26Dot6 orus1, orus2, org1, org2, cur1, cur2, delta1, delta2;
-
-
- if ( p1 > p2 )
- return;
-
- if ( BOUNDS( ref1, worker->max_points ) ||
- BOUNDS( ref2, worker->max_points ) )
- return;
-
- orus1 = worker->orus[ref1].x;
- orus2 = worker->orus[ref2].x;
-
- if ( orus1 > orus2 )
- {
- FT_F26Dot6 tmp_o;
- FT_UInt tmp_r;
-
-
- tmp_o = orus1;
- orus1 = orus2;
- orus2 = tmp_o;
-
- tmp_r = ref1;
- ref1 = ref2;
- ref2 = tmp_r;
- }
-
- org1 = worker->orgs[ref1].x;
- org2 = worker->orgs[ref2].x;
- cur1 = worker->curs[ref1].x;
- cur2 = worker->curs[ref2].x;
- delta1 = cur1 - org1;
- delta2 = cur2 - org2;
-
- if ( cur1 == cur2 || orus1 == orus2 )
- {
-
- /* trivial snap or shift of untouched points */
- for ( i = p1; i <= p2; i++ )
- {
- FT_F26Dot6 x = worker->orgs[i].x;
-
-
- if ( x <= org1 )
- x += delta1;
-
- else if ( x >= org2 )
- x += delta2;
-
- else
- x = cur1;
-
- worker->curs[i].x = x;
- }
- }
- else
- {
- FT_Fixed scale = 0;
- FT_Bool scale_valid = 0;
-
-
- /* interpolation */
- for ( i = p1; i <= p2; i++ )
- {
- FT_F26Dot6 x = worker->orgs[i].x;
-
-
- if ( x <= org1 )
- x += delta1;
-
- else if ( x >= org2 )
- x += delta2;
-
- else
- {
- if ( !scale_valid )
- {
- scale_valid = 1;
- scale = FT_DivFix( cur2 - cur1, orus2 - orus1 );
- }
-
- x = cur1 + FT_MulFix( worker->orus[i].x - orus1, scale );
- }
- worker->curs[i].x = x;
- }
- }
- }
-
-
- /*************************************************************************/
- /* */
- /* IUP[a]: Interpolate Untouched Points */
- /* Opcode range: 0x30-0x31 */
- /* Stack: --> */
- /* */
- static void
- Ins_IUP( TT_ExecContext exc )
- {
- IUP_WorkerRec V;
- FT_Byte mask;
-
- FT_UInt first_point; /* first point of contour */
- FT_UInt end_point; /* end point (last+1) of contour */
-
- FT_UInt first_touched; /* first touched point in contour */
- FT_UInt cur_touched; /* current touched point in contour */
-
- FT_UInt point; /* current point */
- FT_Short contour; /* current contour */
-
-
- /* ignore empty outlines */
- if ( exc->pts.n_contours == 0 )
- return;
-
- if ( exc->opcode & 1 )
- {
- mask = FT_CURVE_TAG_TOUCH_X;
- V.orgs = exc->pts.org;
- V.curs = exc->pts.cur;
- V.orus = exc->pts.orus;
- }
- else
- {
- mask = FT_CURVE_TAG_TOUCH_Y;
- V.orgs = (FT_Vector*)( (FT_Pos*)exc->pts.org + 1 );
- V.curs = (FT_Vector*)( (FT_Pos*)exc->pts.cur + 1 );
- V.orus = (FT_Vector*)( (FT_Pos*)exc->pts.orus + 1 );
- }
- V.max_points = exc->pts.n_points;
-
- contour = 0;
- point = 0;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode )
- {
- exc->iup_called = TRUE;
- if ( exc->sph_tweak_flags & SPH_TWEAK_SKIP_IUP )
- return;
- }
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- do
- {
- end_point = exc->pts.contours[contour] - exc->pts.first_point;
- first_point = point;
-
- if ( BOUNDS( end_point, exc->pts.n_points ) )
- end_point = exc->pts.n_points - 1;
-
- while ( point <= end_point && ( exc->pts.tags[point] & mask ) == 0 )
- point++;
-
- if ( point <= end_point )
- {
- first_touched = point;
- cur_touched = point;
-
- point++;
-
- while ( point <= end_point )
- {
- if ( ( exc->pts.tags[point] & mask ) != 0 )
- {
- _iup_worker_interpolate( &V,
- cur_touched + 1,
- point - 1,
- cur_touched,
- point );
- cur_touched = point;
- }
-
- point++;
- }
-
- if ( cur_touched == first_touched )
- _iup_worker_shift( &V, first_point, end_point, cur_touched );
- else
- {
- _iup_worker_interpolate( &V,
- (FT_UShort)( cur_touched + 1 ),
- end_point,
- cur_touched,
- first_touched );
-
- if ( first_touched > 0 )
- _iup_worker_interpolate( &V,
- first_point,
- first_touched - 1,
- cur_touched,
- first_touched );
- }
- }
- contour++;
- } while ( contour < exc->pts.n_contours );
- }
-
-
- /*************************************************************************/
- /* */
- /* DELTAPn[]: DELTA exceptions P1, P2, P3 */
- /* Opcode range: 0x5D,0x71,0x72 */
- /* Stack: uint32 (2 * uint32)... --> */
- /* */
- static void
- Ins_DELTAP( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong nump, k;
- FT_UShort A;
- FT_ULong C, P;
- FT_Long B;
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- FT_UShort B1, B2;
-
-
- if ( SUBPIXEL_HINTING &&
- exc->ignore_x_mode &&
- exc->iup_called &&
- ( exc->sph_tweak_flags & SPH_TWEAK_NO_DELTAP_AFTER_IUP ) )
- goto Fail;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- P = (FT_ULong)exc->func_cur_ppem( exc );
- nump = (FT_ULong)args[0]; /* some points theoretically may occur more
- than once, thus UShort isn't enough */
-
- for ( k = 1; k <= nump; k++ )
- {
- if ( exc->args < 2 )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Too_Few_Arguments );
- exc->args = 0;
- goto Fail;
- }
-
- exc->args -= 2;
-
- A = (FT_UShort)exc->stack[exc->args + 1];
- B = exc->stack[exc->args];
-
- /* XXX: Because some popular fonts contain some invalid DeltaP */
- /* instructions, we simply ignore them when the stacked */
- /* point reference is off limit, rather than returning an */
- /* error. As a delta instruction doesn't change a glyph */
- /* in great ways, this shouldn't be a problem. */
-
- if ( !BOUNDS( A, exc->zp0.n_points ) )
- {
- C = ( (FT_ULong)B & 0xF0 ) >> 4;
-
- switch ( exc->opcode )
- {
- case 0x5D:
- break;
-
- case 0x71:
- C += 16;
- break;
-
- case 0x72:
- C += 32;
- break;
- }
-
- C += exc->GS.delta_base;
-
- if ( P == C )
- {
- B = ( (FT_ULong)B & 0xF ) - 8;
- if ( B >= 0 )
- B++;
- B *= 1L << ( 6 - exc->GS.delta_shift );
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
-
- if ( SUBPIXEL_HINTING )
- {
- /*
- * Allow delta move if
- *
- * - not using ignore_x_mode rendering,
- * - glyph is specifically set to allow it, or
- * - glyph is composite and freedom vector is not in subpixel
- * direction.
- */
- if ( !exc->ignore_x_mode ||
- ( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_DO_DELTAP ) ||
- ( exc->is_composite && exc->GS.freeVector.y != 0 ) )
- exc->func_move( exc, &exc->zp0, A, B );
-
- /* Otherwise, apply subpixel hinting and compatibility mode */
- /* rules, always skipping deltas in subpixel direction. */
- else if ( exc->ignore_x_mode && exc->GS.freeVector.y != 0 )
- {
- /* save the y value of the point now; compare after move */
- B1 = (FT_UShort)exc->zp0.cur[A].y;
-
- /* Standard subpixel hinting: Allow y move for y-touched */
- /* points. This messes up DejaVu ... */
- if ( !exc->face->sph_compatibility_mode &&
- ( exc->zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
- exc->func_move( exc, &exc->zp0, A, B );
-
- /* compatibility mode */
- else if ( exc->face->sph_compatibility_mode &&
- !( exc->sph_tweak_flags & SPH_TWEAK_ALWAYS_SKIP_DELTAP ) )
- {
- if ( exc->sph_tweak_flags & SPH_TWEAK_ROUND_NONPIXEL_Y_MOVES )
- B = FT_PIX_ROUND( B1 + B ) - B1;
-
- /* Allow delta move if using sph_compatibility_mode, */
- /* IUP has not been called, and point is touched on Y. */
- if ( !exc->iup_called &&
- ( exc->zp0.tags[A] & FT_CURVE_TAG_TOUCH_Y ) )
- exc->func_move( exc, &exc->zp0, A, B );
- }
-
- B2 = (FT_UShort)exc->zp0.cur[A].y;
-
- /* Reverse this move if it results in a disallowed move */
- if ( exc->GS.freeVector.y != 0 &&
- ( ( exc->face->sph_compatibility_mode &&
- ( B1 & 63 ) == 0 &&
- ( B2 & 63 ) != 0 ) ||
- ( ( exc->sph_tweak_flags &
- SPH_TWEAK_SKIP_NONPIXEL_Y_MOVES_DELTAP ) &&
- ( B1 & 63 ) != 0 &&
- ( B2 & 63 ) != 0 ) ) )
- exc->func_move( exc, &exc->zp0, A, -B );
- }
- }
- else
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- exc->func_move( exc, &exc->zp0, A, B );
- }
- }
- else
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Invalid_Reference );
- }
-
- Fail:
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* DELTACn[]: DELTA exceptions C1, C2, C3 */
- /* Opcode range: 0x73,0x74,0x75 */
- /* Stack: uint32 (2 * uint32)... --> */
- /* */
- static void
- Ins_DELTAC( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_ULong nump, k;
- FT_ULong A, C, P;
- FT_Long B;
-
-
- P = (FT_ULong)exc->func_cur_ppem( exc );
- nump = (FT_ULong)args[0];
-
- for ( k = 1; k <= nump; k++ )
- {
- if ( exc->args < 2 )
- {
- if ( exc->pedantic_hinting )
- exc->error = FT_THROW( Too_Few_Arguments );
- exc->args = 0;
- goto Fail;
- }
-
- exc->args -= 2;
-
- A = (FT_ULong)exc->stack[exc->args + 1];
- B = exc->stack[exc->args];
-
- if ( BOUNDSL( A, exc->cvtSize ) )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Invalid_Reference );
- return;
- }
- }
- else
- {
- C = ( (FT_ULong)B & 0xF0 ) >> 4;
-
- switch ( exc->opcode )
- {
- case 0x73:
- break;
-
- case 0x74:
- C += 16;
- break;
-
- case 0x75:
- C += 32;
- break;
- }
-
- C += exc->GS.delta_base;
-
- if ( P == C )
- {
- B = ( (FT_ULong)B & 0xF ) - 8;
- if ( B >= 0 )
- B++;
- B *= 1L << ( 6 - exc->GS.delta_shift );
-
- exc->func_move_cvt( exc, A, B );
- }
- }
- }
-
- Fail:
- exc->new_top = exc->args;
- }
-
-
- /*************************************************************************/
- /* */
- /* MISC. INSTRUCTIONS */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* GETINFO[]: GET INFOrmation */
- /* Opcode range: 0x88 */
- /* Stack: uint32 --> uint32 */
- /* */
- /* XXX: UNDOCUMENTED: Selector bits higher than 9 are currently (May */
- /* 2015) not documented in the OpenType specification. */
- /* */
- /* Selector bit 11 is incorrectly described as bit 8, while the */
- /* real meaning of bit 8 (vertical LCD subpixels) stays */
- /* undocumented. The same mistake can be found in Greg Hitchcock's */
- /* whitepaper. */
- /* */
- static void
- Ins_GETINFO( TT_ExecContext exc,
- FT_Long* args )
- {
- FT_Long K;
-
-
- K = 0;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- /********************************/
- /* RASTERIZER VERSION */
- /* Selector Bit: 0 */
- /* Return Bit(s): 0-7 */
- /* */
- if ( SUBPIXEL_HINTING &&
- ( args[0] & 1 ) != 0 &&
- exc->subpixel_hinting )
- {
- if ( exc->ignore_x_mode )
- {
- /* if in ClearType backwards compatibility mode, */
- /* we sometimes change the TrueType version dynamically */
- K = exc->rasterizer_version;
- FT_TRACE6(( "Setting rasterizer version %d\n",
- exc->rasterizer_version ));
- }
- else
- K = TT_INTERPRETER_VERSION_38;
- }
- else
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
- if ( ( args[0] & 1 ) != 0 )
- K = TT_INTERPRETER_VERSION_35;
-
- /********************************/
- /* GLYPH ROTATED */
- /* Selector Bit: 1 */
- /* Return Bit(s): 8 */
- /* */
- if ( ( args[0] & 2 ) != 0 && exc->tt_metrics.rotated )
- K |= 0x80;
-
- /********************************/
- /* GLYPH STRETCHED */
- /* Selector Bit: 2 */
- /* Return Bit(s): 9 */
- /* */
- if ( ( args[0] & 4 ) != 0 && exc->tt_metrics.stretched )
- K |= 1 << 8;
-
- /********************************/
- /* HINTING FOR GRAYSCALE */
- /* Selector Bit: 5 */
- /* Return Bit(s): 12 */
- /* */
- if ( ( args[0] & 32 ) != 0 && exc->grayscale )
- K |= 1 << 12;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
-
- if ( SUBPIXEL_HINTING &&
- exc->rasterizer_version >= TT_INTERPRETER_VERSION_35 )
- {
-
- if ( exc->rasterizer_version >= 37 )
- {
- /********************************/
- /* HINTING FOR SUBPIXEL */
- /* Selector Bit: 6 */
- /* Return Bit(s): 13 */
- /* */
- if ( ( args[0] & 64 ) != 0 && exc->subpixel_hinting )
- K |= 1 << 13;
-
- /********************************/
- /* COMPATIBLE WIDTHS ENABLED */
- /* Selector Bit: 7 */
- /* Return Bit(s): 14 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 128 ) != 0 && exc->compatible_widths )
- K |= 1 << 14;
-
- /********************************/
- /* VERTICAL LCD SUBPIXELS? */
- /* Selector Bit: 8 */
- /* Return Bit(s): 15 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 256 ) != 0 && exc->vertical_lcd )
- K |= 1 << 15;
-
- /********************************/
- /* HINTING FOR BGR? */
- /* Selector Bit: 9 */
- /* Return Bit(s): 16 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 512 ) != 0 && exc->bgr )
- K |= 1 << 16;
-
- if ( exc->rasterizer_version >= 38 )
- {
- /********************************/
- /* SUBPIXEL POSITIONED? */
- /* Selector Bit: 10 */
- /* Return Bit(s): 17 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 1024 ) != 0 && exc->subpixel_positioned )
- K |= 1 << 17;
-
- /********************************/
- /* SYMMETRICAL SMOOTHING */
- /* Selector Bit: 11 */
- /* Return Bit(s): 18 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 2048 ) != 0 && exc->symmetrical_smoothing )
- K |= 1 << 18;
-
- /********************************/
- /* GRAY CLEARTYPE */
- /* Selector Bit: 12 */
- /* Return Bit(s): 19 */
- /* */
- /* Functionality still needs to be added */
- if ( ( args[0] & 4096 ) != 0 && exc->gray_cleartype )
- K |= 1 << 19;
- }
- }
- }
-
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- args[0] = K;
- }
-
-
- static void
- Ins_UNKNOWN( TT_ExecContext exc )
- {
- TT_DefRecord* def = exc->IDefs;
- TT_DefRecord* limit = def + exc->numIDefs;
-
-
- for ( ; def < limit; def++ )
- {
- if ( (FT_Byte)def->opc == exc->opcode && def->active )
- {
- TT_CallRec* call;
-
-
- if ( exc->callTop >= exc->callSize )
- {
- exc->error = FT_THROW( Stack_Overflow );
- return;
- }
-
- call = exc->callStack + exc->callTop++;
-
- call->Caller_Range = exc->curRange;
- call->Caller_IP = exc->IP + 1;
- call->Cur_Count = 1;
- call->Def = def;
-
- Ins_Goto_CodeRange( exc, def->range, def->start );
-
- exc->step_ins = FALSE;
- return;
- }
- }
-
- exc->error = FT_THROW( Invalid_Opcode );
- }
-
-
- /*************************************************************************/
- /* */
- /* RUN */
- /* */
- /* This function executes a run of opcodes. It will exit in the */
- /* following cases: */
- /* */
- /* - Errors (in which case it returns FALSE). */
- /* */
- /* - Reaching the end of the main code range (returns TRUE). */
- /* Reaching the end of a code range within a function call is an */
- /* error. */
- /* */
- /* - After executing one single opcode, if the flag `Instruction_Trap' */
- /* is set to TRUE (returns TRUE). */
- /* */
- /* On exit with TRUE, test IP < CodeSize to know whether it comes from */
- /* an instruction trap or a normal termination. */
- /* */
- /* */
- /* Note: The documented DEBUG opcode pops a value from the stack. This */
- /* behaviour is unsupported; here a DEBUG opcode is always an */
- /* error. */
- /* */
- /* */
- /* THIS IS THE INTERPRETER'S MAIN LOOP. */
- /* */
- /*************************************************************************/
-
-
- /* documentation is in ttinterp.h */
-
- FT_EXPORT_DEF( FT_Error )
- TT_RunIns( TT_ExecContext exc )
- {
- FT_Long ins_counter = 0; /* executed instructions counter */
- FT_UShort i;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- FT_Byte opcode_pattern[1][2] = {
- /* #8 TypeMan Talk Align */
- {
- 0x06, /* SPVTL */
- 0x7D, /* RDTG */
- },
- };
- FT_UShort opcode_patterns = 1;
- FT_UShort opcode_pointer[1] = { 0 };
- FT_UShort opcode_size[1] = { 1 };
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
- exc->iup_called = FALSE;
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- /* set PPEM and CVT functions */
- exc->tt_metrics.ratio = 0;
- if ( exc->metrics.x_ppem != exc->metrics.y_ppem )
- {
- /* non-square pixels, use the stretched routines */
- exc->func_cur_ppem = Current_Ppem_Stretched;
- exc->func_read_cvt = Read_CVT_Stretched;
- exc->func_write_cvt = Write_CVT_Stretched;
- exc->func_move_cvt = Move_CVT_Stretched;
- }
- else
- {
- /* square pixels, use normal routines */
- exc->func_cur_ppem = Current_Ppem;
- exc->func_read_cvt = Read_CVT;
- exc->func_write_cvt = Write_CVT;
- exc->func_move_cvt = Move_CVT;
- }
-
- Compute_Funcs( exc );
- Compute_Round( exc, (FT_Byte)exc->GS.round_state );
-
- do
- {
- exc->opcode = exc->code[exc->IP];
-
-#ifdef FT_DEBUG_LEVEL_TRACE
- {
- FT_Long cnt = FT_MIN( 8, exc->top );
- FT_Long n;
-
-
- /* if tracing level is 7, show current code position */
- /* and the first few stack elements also */
- FT_TRACE6(( " " ));
- FT_TRACE7(( "%06d ", exc->IP ));
- FT_TRACE6(( opcode_name[exc->opcode] + 2 ));
- FT_TRACE7(( "%*s", *opcode_name[exc->opcode] == 'A'
- ? 2
- : 12 - ( *opcode_name[exc->opcode] - '0' ),
- "#" ));
- for ( n = 1; n <= cnt; n++ )
- FT_TRACE7(( " %d", exc->stack[exc->top - n] ));
- FT_TRACE6(( "\n" ));
- }
-#endif /* FT_DEBUG_LEVEL_TRACE */
-
- if ( ( exc->length = opcode_length[exc->opcode] ) < 0 )
- {
- if ( exc->IP + 1 >= exc->codeSize )
- goto LErrorCodeOverflow_;
-
- exc->length = 2 - exc->length * exc->code[exc->IP + 1];
- }
-
- if ( exc->IP + exc->length > exc->codeSize )
- goto LErrorCodeOverflow_;
-
- /* First, let's check for empty stack and overflow */
- exc->args = exc->top - ( Pop_Push_Count[exc->opcode] >> 4 );
-
- /* `args' is the top of the stack once arguments have been popped. */
- /* One can also interpret it as the index of the last argument. */
- if ( exc->args < 0 )
- {
- if ( exc->pedantic_hinting )
- {
- exc->error = FT_THROW( Too_Few_Arguments );
- goto LErrorLabel_;
- }
-
- /* push zeroes onto the stack */
- for ( i = 0; i < Pop_Push_Count[exc->opcode] >> 4; i++ )
- exc->stack[i] = 0;
- exc->args = 0;
- }
-
- exc->new_top = exc->args + ( Pop_Push_Count[exc->opcode] & 15 );
-
- /* `new_top' is the new top of the stack, after the instruction's */
- /* execution. `top' will be set to `new_top' after the `switch' */
- /* statement. */
- if ( exc->new_top > exc->stackSize )
- {
- exc->error = FT_THROW( Stack_Overflow );
- goto LErrorLabel_;
- }
-
- exc->step_ins = TRUE;
- exc->error = FT_Err_Ok;
-
-#ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING
-
- if ( SUBPIXEL_HINTING )
- {
- for ( i = 0; i < opcode_patterns; i++ )
- {
- if ( opcode_pointer[i] < opcode_size[i] &&
- exc->opcode == opcode_pattern[i][opcode_pointer[i]] )
- {
- opcode_pointer[i] += 1;
-
- if ( opcode_pointer[i] == opcode_size[i] )
- {
- FT_TRACE6(( "sph: opcode ptrn: %d, %s %s\n",
- i,
- exc->face->root.family_name,
- exc->face->root.style_name ));
-
- switch ( i )
- {
- case 0:
- break;
- }
- opcode_pointer[i] = 0;
- }
- }
- else
- opcode_pointer[i] = 0;
- }
- }
-
-#endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */
-
- {
- FT_Long* args = exc->stack + exc->args;
- FT_Byte opcode = exc->opcode;
-
-
- switch ( opcode )
- {
- case 0x00: /* SVTCA y */
- case 0x01: /* SVTCA x */
- case 0x02: /* SPvTCA y */
- case 0x03: /* SPvTCA x */
- case 0x04: /* SFvTCA y */
- case 0x05: /* SFvTCA x */
- Ins_SxyTCA( exc );
- break;
-
- case 0x06: /* SPvTL // */
- case 0x07: /* SPvTL + */
- Ins_SPVTL( exc, args );
- break;
-
- case 0x08: /* SFvTL // */
- case 0x09: /* SFvTL + */
- Ins_SFVTL( exc, args );
- break;
-
- case 0x0A: /* SPvFS */
- Ins_SPVFS( exc, args );
- break;
-
- case 0x0B: /* SFvFS */
- Ins_SFVFS( exc, args );
- break;
-
- case 0x0C: /* GPv */
- Ins_GPV( exc, args );
- break;
-
- case 0x0D: /* GFv */
- Ins_GFV( exc, args );
- break;
-
- case 0x0E: /* SFvTPv */
- Ins_SFVTPV( exc );
- break;
-
- case 0x0F: /* ISECT */
- Ins_ISECT( exc, args );
- break;
-
- case 0x10: /* SRP0 */
- Ins_SRP0( exc, args );
- break;
-
- case 0x11: /* SRP1 */
- Ins_SRP1( exc, args );
- break;
-
- case 0x12: /* SRP2 */
- Ins_SRP2( exc, args );
- break;
-
- case 0x13: /* SZP0 */
- Ins_SZP0( exc, args );
- break;
-
- case 0x14: /* SZP1 */
- Ins_SZP1( exc, args );
- break;
-
- case 0x15: /* SZP2 */
- Ins_SZP2( exc, args );
- break;
-
- case 0x16: /* SZPS */
- Ins_SZPS( exc, args );
- break;
-
- case 0x17: /* SLOOP */
- Ins_SLOOP( exc, args );
- break;
-
- case 0x18: /* RTG */
- Ins_RTG( exc );
- break;
-
- case 0x19: /* RTHG */
- Ins_RTHG( exc );
- break;
-
- case 0x1A: /* SMD */
- Ins_SMD( exc, args );
- break;
-
- case 0x1B: /* ELSE */
- Ins_ELSE( exc );
- break;
-
- case 0x1C: /* JMPR */
- Ins_JMPR( exc, args );
- break;
-
- case 0x1D: /* SCVTCI */
- Ins_SCVTCI( exc, args );
- break;
-
- case 0x1E: /* SSWCI */
- Ins_SSWCI( exc, args );
- break;
-
- case 0x1F: /* SSW */
- Ins_SSW( exc, args );
- break;
-
- case 0x20: /* DUP */
- Ins_DUP( args );
- break;
-
- case 0x21: /* POP */
- Ins_POP();
- break;
-
- case 0x22: /* CLEAR */
- Ins_CLEAR( exc );
- break;
-
- case 0x23: /* SWAP */
- Ins_SWAP( args );
- break;
-
- case 0x24: /* DEPTH */
- Ins_DEPTH( exc, args );
- break;
-
- case 0x25: /* CINDEX */
- Ins_CINDEX( exc, args );
- break;
-
- case 0x26: /* MINDEX */
- Ins_MINDEX( exc, args );
- break;
-
- case 0x27: /* ALIGNPTS */
- Ins_ALIGNPTS( exc, args );
- break;
-
- case 0x28: /* ???? */
- Ins_UNKNOWN( exc );
- break;
-
- case 0x29: /* UTP */
- Ins_UTP( exc, args );
- break;
-
- case 0x2A: /* LOOPCALL */
- Ins_LOOPCALL( exc, args );
- break;
-
- case 0x2B: /* CALL */
- Ins_CALL( exc, args );
- break;
-
- case 0x2C: /* FDEF */
- Ins_FDEF( exc, args );
- break;
-
- case 0x2D: /* ENDF */
- Ins_ENDF( exc );
- break;
-
- case 0x2E: /* MDAP */
- case 0x2F: /* MDAP */
- Ins_MDAP( exc, args );
- break;
-
- case 0x30: /* IUP */
- case 0x31: /* IUP */
- Ins_IUP( exc );
- break;
-
- case 0x32: /* SHP */
- case 0x33: /* SHP */
- Ins_SHP( exc );
- break;
-
- case 0x34: /* SHC */
- case 0x35: /* SHC */
- Ins_SHC( exc, args );
- break;
-
- case 0x36: /* SHZ */
- case 0x37: /* SHZ */
- Ins_SHZ( exc, args );
- break;
-
- case 0x38: /* SHPIX */
- Ins_SHPIX( exc, args );
- break;
-
- case 0x39: /* IP */
- Ins_IP( exc );
- break;
-
- case 0x3A: /* MSIRP */
- case 0x3B: /* MSIRP */
- Ins_MSIRP( exc, args );
- break;
-
- case 0x3C: /* AlignRP */
- Ins_ALIGNRP( exc );
- break;
-
- case 0x3D: /* RTDG */
- Ins_RTDG( exc );
- break;
-
- case 0x3E: /* MIAP */
- case 0x3F: /* MIAP */
- Ins_MIAP( exc, args );
- break;
-
- case 0x40: /* NPUSHB */
- Ins_NPUSHB( exc, args );
- break;
-
- case 0x41: /* NPUSHW */
- Ins_NPUSHW( exc, args );
- break;
-
- case 0x42: /* WS */
- Ins_WS( exc, args );
- break;
-
- case 0x43: /* RS */
- Ins_RS( exc, args );
- break;
-
- case 0x44: /* WCVTP */
- Ins_WCVTP( exc, args );
- break;
-
- case 0x45: /* RCVT */
- Ins_RCVT( exc, args );
- break;
-
- case 0x46: /* GC */
- case 0x47: /* GC */
- Ins_GC( exc, args );
- break;
-
- case 0x48: /* SCFS */
- Ins_SCFS( exc, args );
- break;
-
- case 0x49: /* MD */
- case 0x4A: /* MD */
- Ins_MD( exc, args );
- break;
-
- case 0x4B: /* MPPEM */
- Ins_MPPEM( exc, args );
- break;
-
- case 0x4C: /* MPS */
- Ins_MPS( exc, args );
- break;
-
- case 0x4D: /* FLIPON */
- Ins_FLIPON( exc );
- break;
-
- case 0x4E: /* FLIPOFF */
- Ins_FLIPOFF( exc );
- break;
-
- case 0x4F: /* DEBUG */
- Ins_DEBUG( exc );
- break;
-
- case 0x50: /* LT */
- Ins_LT( args );
- break;
-
- case 0x51: /* LTEQ */
- Ins_LTEQ( args );
- break;
-
- case 0x52: /* GT */
- Ins_GT( args );
- break;
-
- case 0x53: /* GTEQ */
- Ins_GTEQ( args );
- break;
-
- case 0x54: /* EQ */
- Ins_EQ( args );
- break;
-
- case 0x55: /* NEQ */
- Ins_NEQ( args );
- break;
-
- case 0x56: /* ODD */
- Ins_ODD( exc, args );
- break;
-
- case 0x57: /* EVEN */
- Ins_EVEN( exc, args );
- break;
-
- case 0x58: /* IF */
- Ins_IF( exc, args );
- break;
-
- case 0x59: /* EIF */
- Ins_EIF();
- break;
-
- case 0x5A: /* AND */
- Ins_AND( args );
- break;
-
- case 0x5B: /* OR */
- Ins_OR( args );
- break;
-
- case 0x5C: /* NOT */
- Ins_NOT( args );
- break;
-
- case 0x5D: /* DELTAP1 */
- Ins_DELTAP( exc, args );
- break;
-
- case 0x5E: /* SDB */
- Ins_SDB( exc, args );
- break;
-
- case 0x5F: /* SDS */
- Ins_SDS( exc, args );
- break;
-
- case 0x60: /* ADD */
- Ins_ADD( args );
- break;
-
- case 0x61: /* SUB */
- Ins_SUB( args );
- break;
-
- case 0x62: /* DIV */
- Ins_DIV( exc, args );
- break;
-
- case 0x63: /* MUL */
- Ins_MUL( args );
- break;
-
- case 0x64: /* ABS */
- Ins_ABS( args );
- break;
-
- case 0x65: /* NEG */
- Ins_NEG( args );
- break;
-
- case 0x66: /* FLOOR */
- Ins_FLOOR( args );
- break;
-
- case 0x67: /* CEILING */
- Ins_CEILING( args );
- break;
-
- case 0x68: /* ROUND */
- case 0x69: /* ROUND */
- case 0x6A: /* ROUND */
- case 0x6B: /* ROUND */
- Ins_ROUND( exc, args );
- break;
-
- case 0x6C: /* NROUND */
- case 0x6D: /* NROUND */
- case 0x6E: /* NRRUND */
- case 0x6F: /* NROUND */
- Ins_NROUND( exc, args );
- break;
-
- case 0x70: /* WCVTF */
- Ins_WCVTF( exc, args );
- break;
-
- case 0x71: /* DELTAP2 */
- case 0x72: /* DELTAP3 */
- Ins_DELTAP( exc, args );
- break;
-
- case 0x73: /* DELTAC0 */
- case 0x74: /* DELTAC1 */
- case 0x75: /* DELTAC2 */
- Ins_DELTAC( exc, args );
- break;
-
- case 0x76: /* SROUND */
- Ins_SROUND( exc, args );
- break;
-
- case 0x77: /* S45Round */
- Ins_S45ROUND( exc, args );
- break;
-
- case 0x78: /* JROT */
- Ins_JROT( exc, args );
- break;
-
- case 0x79: /* JROF */
- Ins_JROF( exc, args );
- break;
-
- case 0x7A: /* ROFF */
- Ins_ROFF( exc );
- break;
-
- case 0x7B: /* ???? */
- Ins_UNKNOWN( exc );
- break;
-
- case 0x7C: /* RUTG */
- Ins_RUTG( exc );
- break;
-
- case 0x7D: /* RDTG */
- Ins_RDTG( exc );
- break;
-
- case 0x7E: /* SANGW */
- Ins_SANGW();
- break;
-
- case 0x7F: /* AA */
- Ins_AA();
- break;
-
- case 0x80: /* FLIPPT */
- Ins_FLIPPT( exc );
- break;
-
- case 0x81: /* FLIPRGON */
- Ins_FLIPRGON( exc, args );
- break;
-
- case 0x82: /* FLIPRGOFF */
- Ins_FLIPRGOFF( exc, args );
- break;
-
- case 0x83: /* UNKNOWN */
- case 0x84: /* UNKNOWN */
- Ins_UNKNOWN( exc );
- break;
-
- case 0x85: /* SCANCTRL */
- Ins_SCANCTRL( exc, args );
- break;
-
- case 0x86: /* SDPvTL */
- case 0x87: /* SDPvTL */
- Ins_SDPVTL( exc, args );
- break;
-
- case 0x88: /* GETINFO */
- Ins_GETINFO( exc, args );
- break;
-
- case 0x89: /* IDEF */
- Ins_IDEF( exc, args );
- break;
-
- case 0x8A: /* ROLL */
- Ins_ROLL( args );
- break;
-
- case 0x8B: /* MAX */
- Ins_MAX( args );
- break;
-
- case 0x8C: /* MIN */
- Ins_MIN( args );
- break;
-
- case 0x8D: /* SCANTYPE */
- Ins_SCANTYPE( exc, args );
- break;
-
- case 0x8E: /* INSTCTRL */
- Ins_INSTCTRL( exc, args );
- break;
-
- case 0x8F:
- Ins_UNKNOWN( exc );
- break;
-
- default:
- if ( opcode >= 0xE0 )
- Ins_MIRP( exc, args );
- else if ( opcode >= 0xC0 )
- Ins_MDRP( exc, args );
- else if ( opcode >= 0xB8 )
- Ins_PUSHW( exc, args );
- else if ( opcode >= 0xB0 )
- Ins_PUSHB( exc, args );
- else
- Ins_UNKNOWN( exc );
- }
- }
-
- if ( exc->error )
- {
- switch ( exc->error )
- {
- /* looking for redefined instructions */
- case FT_ERR( Invalid_Opcode ):
- {
- TT_DefRecord* def = exc->IDefs;
- TT_DefRecord* limit = def + exc->numIDefs;
-
-
- for ( ; def < limit; def++ )
- {
- if ( def->active && exc->opcode == (FT_Byte)def->opc )
- {
- TT_CallRec* callrec;
-
-
- if ( exc->callTop >= exc->callSize )
- {
- exc->error = FT_THROW( Invalid_Reference );
- goto LErrorLabel_;
- }
-
- callrec = &exc->callStack[exc->callTop];
-
- callrec->Caller_Range = exc->curRange;
- callrec->Caller_IP = exc->IP + 1;
- callrec->Cur_Count = 1;
- callrec->Def = def;
-
- if ( Ins_Goto_CodeRange( exc,
- def->range,
- def->start ) == FAILURE )
- goto LErrorLabel_;
-
- goto LSuiteLabel_;
- }
- }
- }
-
- exc->error = FT_THROW( Invalid_Opcode );
- goto LErrorLabel_;
-
-#if 0
- break; /* Unreachable code warning suppression. */
- /* Leave to remind in case a later change the editor */
- /* to consider break; */
-#endif
-
- default:
- goto LErrorLabel_;
-
-#if 0
- break;
-#endif
- }
- }
-
- exc->top = exc->new_top;
-
- if ( exc->step_ins )
- exc->IP += exc->length;
-
- /* increment instruction counter and check if we didn't */
- /* run this program for too long (e.g. infinite loops). */
- if ( ++ins_counter > TT_CONFIG_OPTION_MAX_RUNNABLE_OPCODES )
- return FT_THROW( Execution_Too_Long );
-
- LSuiteLabel_:
- if ( exc->IP >= exc->codeSize )
- {
- if ( exc->callTop > 0 )
- {
- exc->error = FT_THROW( Code_Overflow );
- goto LErrorLabel_;
- }
- else
- goto LNo_Error_;
- }
- } while ( !exc->instruction_trap );
-
- LNo_Error_:
- return FT_Err_Ok;
-
- LErrorCodeOverflow_:
- exc->error = FT_THROW( Code_Overflow );
-
- LErrorLabel_:
- /* If any errors have occurred, function tables may be broken. */
- /* Force a re-execution of `prep' and `fpgm' tables if no */
- /* bytecode debugger is run. */
- if ( exc->error &&
- !exc->instruction_trap &&
- exc->curRange == tt_coderange_glyph )
- {
- FT_TRACE1(( " The interpreter returned error 0x%x\n", exc->error ));
- exc->size->bytecode_ready = -1;
- exc->size->cvt_ready = -1;
- }
-
- return exc->error;
- }
-
-
-#endif /* TT_USE_BYTECODE_INTERPRETER */
-
-
-/* END */
projects / reactos.git / blobdiff