src/tagloadr.h

   1 /* tagloadr.h */
   2
   3 /* originally file `ftgloadr.h' (2011-Mar-28) from FreeType */
   4
   5 /* heavily modified 2011 by Werner Lemberg <wl@gnu.org> */
   6
   7 #ifndef __TAGLOADR_H__
   8 #define __TAGLOADR_H__
   9
  10 #include <ft2build.h>
  11 #include FT_FREETYPE_H
  12
  13
  14 typedef struct TA_SubGlyphRec_
  15 {
  16   FT_Int index;
  17   FT_UShort flags;
  18
  19   FT_Int arg1;
  20   FT_Int arg2;
  21
  22   FT_Matrix transform;
  23 } TA_SubGlyphRec, *TA_SubGlyph;
  24
  25
  26 typedef struct TA_GlyphLoadRec_
  27 {
  28   FT_Outline outline; /* outline */
  29
  30   FT_Vector* extra_points; /* extra points table */
  31   FT_Vector* extra_points2; /* second extra points table */
  32
  33   FT_UInt num_subglyphs; /* number of subglyphs */
  34   TA_SubGlyph subglyphs; /* subglyphs */
  35 } TA_GlyphLoadRec, *TA_GlyphLoad;
  36
  37
  38 typedef struct TA_GlyphLoaderRec_
  39 {
  40   FT_UInt max_points;
  41   FT_UInt max_contours;
  42   FT_UInt max_subglyphs;
  43   FT_Bool use_extra;
  44
  45   TA_GlyphLoadRec base;
  46   TA_GlyphLoadRec current;
  47 } TA_GlyphLoaderRec, *TA_GlyphLoader;
  48
  49
  50 /* create new empty glyph loader */
  51 FT_Error
  52 TA_GlyphLoader_New(TA_GlyphLoader *aloader);
  53
  54 /* add an extra points table to a glyph loader */
  55 FT_Error
  56 TA_GlyphLoader_CreateExtra(TA_GlyphLoader loader);
  57
  58 /* destroy a glyph loader */
  59 void
  60 TA_GlyphLoader_Done(TA_GlyphLoader loader);
  61
  62 /* reset a glyph loader (frees everything int it) */
  63 void
  64 TA_GlyphLoader_Reset(TA_GlyphLoader loader);
  65
  66 /* rewind a glyph loader */
  67 void
  68 TA_GlyphLoader_Rewind(TA_GlyphLoader loader);
  69
  70 /* check that there is enough space to add */
  71 /* `n_points' and `n_contours' to the glyph loader */
  72 FT_Error
  73 TA_GlyphLoader_CheckPoints(TA_GlyphLoader loader,
  74                            FT_UInt n_points,
  75                            FT_UInt n_contours);
  76
  77
  78 #define TA_GLYPHLOADER_CHECK_P(_loader, _count) \
  79    ((_count) == 0 || ((_loader)->base.outline.n_points \
  80                       + (_loader)->current.outline.n_points \
  81                       + (unsigned long)(_count)) <= (_loader)->max_points)
  82
  83 #define TA_GLYPHLOADER_CHECK_C(_loader, _count) \
  84    ((_count) == 0 || ((_loader)->base.outline.n_contours \
  85                       + (_loader)->current.outline.n_contours \
  86                       + (unsigned long)(_count)) <= (_loader)->max_contours)
  87
  88 #define TA_GLYPHLOADER_CHECK_POINTS(_loader, _points, _contours) \
  89    ((TA_GLYPHLOADER_CHECK_P(_loader, _points) \
  90      && TA_GLYPHLOADER_CHECK_C(_loader, _contours)) \
  91     ? 0 \
  92     : TA_GlyphLoader_CheckPoints((_loader), (_points), (_contours)))
  93
  94
  95 /* check that there is enough space to add */
  96 /* `n_subs' sub-glyphs to a glyph loader */
  97 FT_Error
  98 TA_GlyphLoader_CheckSubGlyphs(TA_GlyphLoader loader,
  99                               FT_UInt n_subs);
 100
 101 /* prepare a glyph loader, i.e. empty the current glyph */
 102 void
 103 TA_GlyphLoader_Prepare(TA_GlyphLoader loader);
 104
 105 /* add the current glyph to the base glyph */
 106 void
 107 TA_GlyphLoader_Add(TA_GlyphLoader loader);
 108
 109 /* copy points from one glyph loader to another */
 110 FT_Error
 111 TA_GlyphLoader_CopyPoints(TA_GlyphLoader target,
 112                           TA_GlyphLoader source);
 113
 114 #endif /* __TAGLOADR_H__ */
 115
 116 /* end of tagloadr.h */