150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
|
/****************************************************************************
|
||
|
|
*
|
||
|
|
* ftgloadr.h
|
||
|
|
*
|
||
|
|
* The FreeType glyph loader (specification).
|
||
|
|
*
|
||
|
|
* Copyright (C) 2002-2020 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 FTGLOADR_H_
|
||
|
|
#define FTGLOADR_H_
|
||
|
|
|
||
|
|
|
||
|
|
#include <ft2build.h>
|
||
|
|
#include FT_FREETYPE_H
|
||
|
|
|
||
|
|
|
||
|
|
FT_BEGIN_HEADER
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************
|
||
|
|
*
|
||
|
|
* @struct:
|
||
|
|
* FT_GlyphLoader
|
||
|
|
*
|
||
|
|
* @description:
|
||
|
|
* The glyph loader is an internal object used to load several glyphs
|
||
|
|
* together (for example, in the case of composites).
|
||
|
|
*/
|
||
|
|
typedef struct FT_SubGlyphRec_
|
||
|
|
{
|
||
|
|
FT_Int index;
|
||
|
|
FT_UShort flags;
|
||
|
|
FT_Int arg1;
|
||
|
|
FT_Int arg2;
|
||
|
|
FT_Matrix transform;
|
||
|
|
|
||
|
|
} FT_SubGlyphRec;
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct FT_GlyphLoadRec_
|
||
|
|
{
|
||
|
|
FT_Outline outline; /* outline */
|
||
|
|
FT_Vector* extra_points; /* extra points table */
|
||
|
|
FT_Vector* extra_points2; /* second extra points table */
|
||
|
|
FT_UInt num_subglyphs; /* number of subglyphs */
|
||
|
|
FT_SubGlyph subglyphs; /* subglyphs */
|
||
|
|
|
||
|
|
} FT_GlyphLoadRec, *FT_GlyphLoad;
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct FT_GlyphLoaderRec_
|
||
|
|
{
|
||
|
|
FT_Memory memory;
|
||
|
|
FT_UInt max_points;
|
||
|
|
FT_UInt max_contours;
|
||
|
|
FT_UInt max_subglyphs;
|
||
|
|
FT_Bool use_extra;
|
||
|
|
|
||
|
|
FT_GlyphLoadRec base;
|
||
|
|
FT_GlyphLoadRec current;
|
||
|
|
|
||
|
|
void* other; /* for possible future extension? */
|
||
|
|
|
||
|
|
} FT_GlyphLoaderRec, *FT_GlyphLoader;
|
||
|
|
|
||
|
|
|
||
|
|
/* create new empty glyph loader */
|
||
|
|
FT_BASE( FT_Error )
|
||
|
|
FT_GlyphLoader_New( FT_Memory memory,
|
||
|
|
FT_GlyphLoader *aloader );
|
||
|
|
|
||
|
|
/* add an extra points table to a glyph loader */
|
||
|
|
FT_BASE( FT_Error )
|
||
|
|
FT_GlyphLoader_CreateExtra( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* destroy a glyph loader */
|
||
|
|
FT_BASE( void )
|
||
|
|
FT_GlyphLoader_Done( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* reset a glyph loader (frees everything int it) */
|
||
|
|
FT_BASE( void )
|
||
|
|
FT_GlyphLoader_Reset( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* rewind a glyph loader */
|
||
|
|
FT_BASE( void )
|
||
|
|
FT_GlyphLoader_Rewind( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* check that there is enough space to add `n_points' and `n_contours' */
|
||
|
|
/* to the glyph loader */
|
||
|
|
FT_BASE( FT_Error )
|
||
|
|
FT_GlyphLoader_CheckPoints( FT_GlyphLoader loader,
|
||
|
|
FT_UInt n_points,
|
||
|
|
FT_UInt n_contours );
|
||
|
|
|
||
|
|
|
||
|
|
#define FT_GLYPHLOADER_CHECK_P( _loader, _count ) \
|
||
|
|
( (_count) == 0 || \
|
||
|
|
( (FT_UInt)(_loader)->base.outline.n_points + \
|
||
|
|
(FT_UInt)(_loader)->current.outline.n_points + \
|
||
|
|
(FT_UInt)(_count) ) <= (_loader)->max_points )
|
||
|
|
|
||
|
|
#define FT_GLYPHLOADER_CHECK_C( _loader, _count ) \
|
||
|
|
( (_count) == 0 || \
|
||
|
|
( (FT_UInt)(_loader)->base.outline.n_contours + \
|
||
|
|
(FT_UInt)(_loader)->current.outline.n_contours + \
|
||
|
|
(FT_UInt)(_count) ) <= (_loader)->max_contours )
|
||
|
|
|
||
|
|
#define FT_GLYPHLOADER_CHECK_POINTS( _loader, _points, _contours ) \
|
||
|
|
( ( FT_GLYPHLOADER_CHECK_P( _loader, _points ) && \
|
||
|
|
FT_GLYPHLOADER_CHECK_C( _loader, _contours ) ) \
|
||
|
|
? 0 \
|
||
|
|
: FT_GlyphLoader_CheckPoints( (_loader), \
|
||
|
|
(FT_UInt)(_points), \
|
||
|
|
(FT_UInt)(_contours) ) )
|
||
|
|
|
||
|
|
|
||
|
|
/* check that there is enough space to add `n_subs' sub-glyphs to */
|
||
|
|
/* a glyph loader */
|
||
|
|
FT_BASE( FT_Error )
|
||
|
|
FT_GlyphLoader_CheckSubGlyphs( FT_GlyphLoader loader,
|
||
|
|
FT_UInt n_subs );
|
||
|
|
|
||
|
|
/* prepare a glyph loader, i.e. empty the current glyph */
|
||
|
|
FT_BASE( void )
|
||
|
|
FT_GlyphLoader_Prepare( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* add the current glyph to the base glyph */
|
||
|
|
FT_BASE( void )
|
||
|
|
FT_GlyphLoader_Add( FT_GlyphLoader loader );
|
||
|
|
|
||
|
|
/* */
|
||
|
|
|
||
|
|
|
||
|
|
FT_END_HEADER
|
||
|
|
|
||
|
|
#endif /* FTGLOADR_H_ */
|
||
|
|
|
||
|
|
|
||
|
|
/* END */
|