-/***************************************************************************/\r
-/* */\r
-/* gxvopbd.c */\r
-/* */\r
-/* TrueTypeGX/AAT opbd table validation (body). */\r
-/* */\r
-/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */\r
-/* David Turner, Robert Wilhelm, and Werner Lemberg. */\r
-/* */\r
-/* This file is part of the FreeType project, and may only be used, */\r
-/* modified, and distributed under the terms of the FreeType project */\r
-/* license, LICENSE.TXT. By continuing to use, modify, or distribute */\r
-/* this file you indicate that you have read the license and */\r
-/* understand and accept it fully. */\r
-/* */\r
-/***************************************************************************/\r
-\r
-/***************************************************************************/\r
-/* */\r
-/* gxvalid is derived from both gxlayout module and otvalid module. */\r
-/* Development of gxlayout is supported by the Information-technology */\r
-/* Promotion Agency(IPA), Japan. */\r
-/* */\r
-/***************************************************************************/\r
-\r
-\r
-#include "gxvalid.h"\r
-#include "gxvcommn.h"\r
-\r
-\r
- /*************************************************************************/\r
- /* */\r
- /* The macro FT_COMPONENT is used in trace mode. It is an implicit */\r
- /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */\r
- /* messages during execution. */\r
- /* */\r
-#undef FT_COMPONENT\r
-#define FT_COMPONENT trace_gxvopbd\r
-\r
-\r
- /*************************************************************************/\r
- /*************************************************************************/\r
- /***** *****/\r
- /***** Data and Types *****/\r
- /***** *****/\r
- /*************************************************************************/\r
- /*************************************************************************/\r
-\r
- typedef struct GXV_opbd_DataRec_\r
- {\r
- FT_UShort format;\r
- FT_UShort valueOffset_min;\r
-\r
- } GXV_opbd_DataRec, *GXV_opbd_Data;\r
-\r
-\r
-#define GXV_OPBD_DATA( FIELD ) GXV_TABLE_DATA( opbd, FIELD )\r
-\r
-\r
- /*************************************************************************/\r
- /*************************************************************************/\r
- /***** *****/\r
- /***** UTILITY FUNCTIONS *****/\r
- /***** *****/\r
- /*************************************************************************/\r
- /*************************************************************************/\r
-\r
- static void\r
- gxv_opbd_LookupValue_validate( FT_UShort glyph,\r
- GXV_LookupValueDesc value,\r
- GXV_Validator valid )\r
- {\r
- /* offset in LookupTable is measured from the head of opbd table */\r
- FT_Bytes p = valid->root->base + value.u;\r
- FT_Bytes limit = valid->root->limit;\r
- FT_Short delta_value;\r
- int i;\r
-\r
-\r
- if ( value.u < GXV_OPBD_DATA( valueOffset_min ) )\r
- GXV_OPBD_DATA( valueOffset_min ) = value.u;\r
-\r
- for ( i = 0; i < 4; i++ )\r
- {\r
- GXV_LIMIT_CHECK( 2 );\r
- delta_value = FT_NEXT_SHORT( p );\r
-\r
- if ( GXV_OPBD_DATA( format ) ) /* format 1, value is ctrl pt. */\r
- {\r
- if ( delta_value == -1 )\r
- continue;\r
-\r
- gxv_ctlPoint_validate( glyph, delta_value, valid );\r
- }\r
- else /* format 0, value is distance */\r
- continue;\r
- }\r
- }\r
-\r
-\r
- /*\r
- opbd ---------------------+\r
- |\r
- +===============+ |\r
- | lookup header | |\r
- +===============+ |\r
- | BinSrchHeader | |\r
- +===============+ |\r
- | lastGlyph[0] | |\r
- +---------------+ |\r
- | firstGlyph[0] | | head of opbd sfnt table\r
- +---------------+ | +\r
- | offset[0] | -> | offset [byte]\r
- +===============+ | +\r
- | lastGlyph[1] | | (glyphID - firstGlyph) * 4 * sizeof(FT_Short) [byte]\r
- +---------------+ |\r
- | firstGlyph[1] | |\r
- +---------------+ |\r
- | offset[1] | |\r
- +===============+ |\r
- |\r
- .... |\r
- |\r
- 48bit value array |\r
- +===============+ |\r
- | value | <-------+\r
- | |\r
- | |\r
- | |\r
- +---------------+\r
- .... */\r
-\r
- static GXV_LookupValueDesc\r
- gxv_opbd_LookupFmt4_transit( FT_UShort relative_gindex,\r
- GXV_LookupValueDesc base_value,\r
- FT_Bytes lookuptbl_limit,\r
- GXV_Validator valid )\r
- {\r
- GXV_LookupValueDesc value;\r
-\r
- FT_UNUSED( lookuptbl_limit );\r
- FT_UNUSED( valid );\r
-\r
- /* XXX: check range? */\r
- value.u = (FT_UShort)( base_value.u +\r
- relative_gindex * 4 * sizeof ( FT_Short ) );\r
-\r
- return value;\r
- }\r
-\r
-\r
- /*************************************************************************/\r
- /*************************************************************************/\r
- /***** *****/\r
- /***** opbd TABLE *****/\r
- /***** *****/\r
- /*************************************************************************/\r
- /*************************************************************************/\r
-\r
- FT_LOCAL_DEF( void )\r
- gxv_opbd_validate( FT_Bytes table,\r
- FT_Face face,\r
- FT_Validator ftvalid )\r
- {\r
- GXV_ValidatorRec validrec;\r
- GXV_Validator valid = &validrec;\r
- GXV_opbd_DataRec opbdrec;\r
- GXV_opbd_Data opbd = &opbdrec;\r
- FT_Bytes p = table;\r
- FT_Bytes limit = 0;\r
-\r
- FT_ULong version;\r
-\r
-\r
- valid->root = ftvalid;\r
- valid->table_data = opbd;\r
- valid->face = face;\r
-\r
- FT_TRACE3(( "validating `opbd' table\n" ));\r
- GXV_INIT;\r
- GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;\r
-\r
-\r
- GXV_LIMIT_CHECK( 4 + 2 );\r
- version = FT_NEXT_ULONG( p );\r
- GXV_OPBD_DATA( format ) = FT_NEXT_USHORT( p );\r
-\r
-\r
- /* only 0x00010000 is defined (1996) */\r
- GXV_TRACE(( "(version=0x%08x)\n", version ));\r
- if ( 0x00010000UL != version )\r
- FT_INVALID_FORMAT;\r
-\r
- /* only values 0 and 1 are defined (1996) */\r
- GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));\r
- if ( 0x0001 < GXV_OPBD_DATA( format ) )\r
- FT_INVALID_FORMAT;\r
-\r
- valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;\r
- valid->lookupval_func = gxv_opbd_LookupValue_validate;\r
- valid->lookupfmt4_trans = gxv_opbd_LookupFmt4_transit;\r
-\r
- gxv_LookupTable_validate( p, limit, valid );\r
- p += valid->subtable_length;\r
-\r
- if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )\r
- {\r
- GXV_TRACE((\r
- "found overlap between LookupTable and opbd_value array\n" ));\r
- FT_INVALID_OFFSET;\r
- }\r
-\r
- FT_TRACE4(( "\n" ));\r
- }\r
-\r
-\r
-/* END */\r
+/***************************************************************************/
+/* */
+/* gxvopbd.c */
+/* */
+/* TrueTypeGX/AAT opbd table validation (body). */
+/* */
+/* Copyright 2004, 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
+/* 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. */
+/* */
+/***************************************************************************/
+
+/***************************************************************************/
+/* */
+/* gxvalid is derived from both gxlayout module and otvalid module. */
+/* Development of gxlayout is supported by the Information-technology */
+/* Promotion Agency(IPA), Japan. */
+/* */
+/***************************************************************************/
+
+
+#include "gxvalid.h"
+#include "gxvcommn.h"
+
+
+ /*************************************************************************/
+ /* */
+ /* 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_gxvopbd
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** Data and Types *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ typedef struct GXV_opbd_DataRec_
+ {
+ FT_UShort format;
+ FT_UShort valueOffset_min;
+
+ } GXV_opbd_DataRec, *GXV_opbd_Data;
+
+
+#define GXV_OPBD_DATA( FIELD ) GXV_TABLE_DATA( opbd, FIELD )
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** UTILITY FUNCTIONS *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ static void
+ gxv_opbd_LookupValue_validate( FT_UShort glyph,
+ GXV_LookupValueDesc value,
+ GXV_Validator valid )
+ {
+ /* offset in LookupTable is measured from the head of opbd table */
+ FT_Bytes p = valid->root->base + value.u;
+ FT_Bytes limit = valid->root->limit;
+ FT_Short delta_value;
+ int i;
+
+
+ if ( value.u < GXV_OPBD_DATA( valueOffset_min ) )
+ GXV_OPBD_DATA( valueOffset_min ) = value.u;
+
+ for ( i = 0; i < 4; i++ )
+ {
+ GXV_LIMIT_CHECK( 2 );
+ delta_value = FT_NEXT_SHORT( p );
+
+ if ( GXV_OPBD_DATA( format ) ) /* format 1, value is ctrl pt. */
+ {
+ if ( delta_value == -1 )
+ continue;
+
+ gxv_ctlPoint_validate( glyph, delta_value, valid );
+ }
+ else /* format 0, value is distance */
+ continue;
+ }
+ }
+
+
+ /*
+ opbd ---------------------+
+ |
+ +===============+ |
+ | lookup header | |
+ +===============+ |
+ | BinSrchHeader | |
+ +===============+ |
+ | lastGlyph[0] | |
+ +---------------+ |
+ | firstGlyph[0] | | head of opbd sfnt table
+ +---------------+ | +
+ | offset[0] | -> | offset [byte]
+ +===============+ | +
+ | lastGlyph[1] | | (glyphID - firstGlyph) * 4 * sizeof(FT_Short) [byte]
+ +---------------+ |
+ | firstGlyph[1] | |
+ +---------------+ |
+ | offset[1] | |
+ +===============+ |
+ |
+ .... |
+ |
+ 48bit value array |
+ +===============+ |
+ | value | <-------+
+ | |
+ | |
+ | |
+ +---------------+
+ .... */
+
+ static GXV_LookupValueDesc
+ gxv_opbd_LookupFmt4_transit( FT_UShort relative_gindex,
+ GXV_LookupValueDesc base_value,
+ FT_Bytes lookuptbl_limit,
+ GXV_Validator valid )
+ {
+ GXV_LookupValueDesc value;
+
+ FT_UNUSED( lookuptbl_limit );
+ FT_UNUSED( valid );
+
+ /* XXX: check range? */
+ value.u = (FT_UShort)( base_value.u +
+ relative_gindex * 4 * sizeof ( FT_Short ) );
+
+ return value;
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** opbd TABLE *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ FT_LOCAL_DEF( void )
+ gxv_opbd_validate( FT_Bytes table,
+ FT_Face face,
+ FT_Validator ftvalid )
+ {
+ GXV_ValidatorRec validrec;
+ GXV_Validator valid = &validrec;
+ GXV_opbd_DataRec opbdrec;
+ GXV_opbd_Data opbd = &opbdrec;
+ FT_Bytes p = table;
+ FT_Bytes limit = 0;
+
+ FT_ULong version;
+
+
+ valid->root = ftvalid;
+ valid->table_data = opbd;
+ valid->face = face;
+
+ FT_TRACE3(( "validating `opbd' table\n" ));
+ GXV_INIT;
+ GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;
+
+
+ GXV_LIMIT_CHECK( 4 + 2 );
+ version = FT_NEXT_ULONG( p );
+ GXV_OPBD_DATA( format ) = FT_NEXT_USHORT( p );
+
+
+ /* only 0x00010000 is defined (1996) */
+ GXV_TRACE(( "(version=0x%08x)\n", version ));
+ if ( 0x00010000UL != version )
+ FT_INVALID_FORMAT;
+
+ /* only values 0 and 1 are defined (1996) */
+ GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));
+ if ( 0x0001 < GXV_OPBD_DATA( format ) )
+ FT_INVALID_FORMAT;
+
+ valid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
+ valid->lookupval_func = gxv_opbd_LookupValue_validate;
+ valid->lookupfmt4_trans = gxv_opbd_LookupFmt4_transit;
+
+ gxv_LookupTable_validate( p, limit, valid );
+ p += valid->subtable_length;
+
+ if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )
+ {
+ GXV_TRACE((
+ "found overlap between LookupTable and opbd_value array\n" ));
+ FT_INVALID_OFFSET;
+ }
+
+ FT_TRACE4(( "\n" ));
+ }
+
+
+/* END */
projects / reactos.git / blobdiff