+++ /dev/null
-/***************************************************************************/
-/* */
-/* aflatin.h */
-/* */
-/* Auto-fitter hinting routines for latin writing system */
-/* (specification). */
-/* */
-/* Copyright 2003-2016 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. */
-/* */
-/***************************************************************************/
-
-
-#ifndef AFLATIN_H_
-#define AFLATIN_H_
-
-#include "afhints.h"
-
-
-FT_BEGIN_HEADER
-
- /* the `latin' writing system */
-
- AF_DECLARE_WRITING_SYSTEM_CLASS( af_latin_writing_system_class )
-
-
- /* constants are given with units_per_em == 2048 in mind */
-#define AF_LATIN_CONSTANT( metrics, c ) \
- ( ( (c) * (FT_Long)( (AF_LatinMetrics)(metrics) )->units_per_em ) / 2048 )
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** L A T I N G L O B A L M E T R I C S *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*
- * The following declarations could be embedded in the file `aflatin.c';
- * they have been made semi-public to allow alternate writing system
- * hinters to re-use some of them.
- */
-
-
-#define AF_LATIN_IS_TOP_BLUE( b ) \
- ( (b)->properties & AF_BLUE_PROPERTY_LATIN_TOP )
-#define AF_LATIN_IS_SUB_TOP_BLUE( b ) \
- ( (b)->properties & AF_BLUE_PROPERTY_LATIN_SUB_TOP )
-#define AF_LATIN_IS_NEUTRAL_BLUE( b ) \
- ( (b)->properties & AF_BLUE_PROPERTY_LATIN_NEUTRAL )
-#define AF_LATIN_IS_X_HEIGHT_BLUE( b ) \
- ( (b)->properties & AF_BLUE_PROPERTY_LATIN_X_HEIGHT )
-#define AF_LATIN_IS_LONG_BLUE( b ) \
- ( (b)->properties & AF_BLUE_PROPERTY_LATIN_LONG )
-
-#define AF_LATIN_MAX_WIDTHS 16
-
-
-#define AF_LATIN_BLUE_ACTIVE ( 1U << 0 ) /* zone height is <= 3/4px */
-#define AF_LATIN_BLUE_TOP ( 1U << 1 ) /* we have a top blue zone */
-#define AF_LATIN_BLUE_SUB_TOP ( 1U << 2 ) /* we have a subscript top */
- /* blue zone */
-#define AF_LATIN_BLUE_NEUTRAL ( 1U << 3 ) /* we have neutral blue zone */
-#define AF_LATIN_BLUE_ADJUSTMENT ( 1U << 4 ) /* used for scale adjustment */
- /* optimization */
-
-
- typedef struct AF_LatinBlueRec_
- {
- AF_WidthRec ref;
- AF_WidthRec shoot;
- FT_Pos ascender;
- FT_Pos descender;
- FT_UInt flags;
-
- } AF_LatinBlueRec, *AF_LatinBlue;
-
-
- typedef struct AF_LatinAxisRec_
- {
- FT_Fixed scale;
- FT_Pos delta;
-
- FT_UInt width_count; /* number of used widths */
- AF_WidthRec widths[AF_LATIN_MAX_WIDTHS]; /* widths array */
- FT_Pos edge_distance_threshold; /* used for creating edges */
- FT_Pos standard_width; /* the default stem thickness */
- FT_Bool extra_light; /* is standard width very light? */
-
- /* ignored for horizontal metrics */
- FT_UInt blue_count;
- AF_LatinBlueRec blues[AF_BLUE_STRINGSET_MAX];
-
- FT_Fixed org_scale;
- FT_Pos org_delta;
-
- } AF_LatinAxisRec, *AF_LatinAxis;
-
-
- typedef struct AF_LatinMetricsRec_
- {
- AF_StyleMetricsRec root;
- FT_UInt units_per_em;
- AF_LatinAxisRec axis[AF_DIMENSION_MAX];
-
- } AF_LatinMetricsRec, *AF_LatinMetrics;
-
-
- FT_LOCAL( FT_Error )
- af_latin_metrics_init( AF_LatinMetrics metrics,
- FT_Face face );
-
- FT_LOCAL( void )
- af_latin_metrics_scale( AF_LatinMetrics metrics,
- AF_Scaler scaler );
-
- FT_LOCAL( void )
- af_latin_metrics_init_widths( AF_LatinMetrics metrics,
- FT_Face face );
-
- FT_LOCAL( void )
- af_latin_metrics_check_digits( AF_LatinMetrics metrics,
- FT_Face face );
-
-
- /*************************************************************************/
- /*************************************************************************/
- /***** *****/
- /***** L A T I N G L Y P H A N A L Y S I S *****/
- /***** *****/
- /*************************************************************************/
- /*************************************************************************/
-
-#define AF_LATIN_HINTS_HORZ_SNAP ( 1U << 0 ) /* stem width snapping */
-#define AF_LATIN_HINTS_VERT_SNAP ( 1U << 1 ) /* stem height snapping */
-#define AF_LATIN_HINTS_STEM_ADJUST ( 1U << 2 ) /* stem width/height */
- /* adjustment */
-#define AF_LATIN_HINTS_MONO ( 1U << 3 ) /* monochrome rendering */
-
-
-#define AF_LATIN_HINTS_DO_HORZ_SNAP( h ) \
- AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_HORZ_SNAP )
-
-#define AF_LATIN_HINTS_DO_VERT_SNAP( h ) \
- AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_VERT_SNAP )
-
-#define AF_LATIN_HINTS_DO_STEM_ADJUST( h ) \
- AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_STEM_ADJUST )
-
-#define AF_LATIN_HINTS_DO_MONO( h ) \
- AF_HINTS_TEST_OTHER( h, AF_LATIN_HINTS_MONO )
-
-
- /*
- * The next functions shouldn't normally be exported. However, other
- * writing systems might like to use these functions as-is.
- */
- FT_LOCAL( FT_Error )
- af_latin_hints_compute_segments( AF_GlyphHints hints,
- AF_Dimension dim );
-
- FT_LOCAL( void )
- af_latin_hints_link_segments( AF_GlyphHints hints,
- FT_UInt width_count,
- AF_WidthRec* widths,
- AF_Dimension dim );
-
- FT_LOCAL( FT_Error )
- af_latin_hints_compute_edges( AF_GlyphHints hints,
- AF_Dimension dim );
-
- FT_LOCAL( FT_Error )
- af_latin_hints_detect_features( AF_GlyphHints hints,
- FT_UInt width_count,
- AF_WidthRec* widths,
- AF_Dimension dim );
-
-/* */
-
-FT_END_HEADER
-
-#endif /* AFLATIN_H_ */
-
-
-/* END */
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