87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
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#ifndef VG_FONT_H
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#define VG_FONT_H
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#include <VG/openvg.h>
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typedef struct {
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// glyph index within the OpenVG font object
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VGuint glyphIndex;
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// the advance width for this glyph
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VGfloat escapement[2];
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// OpenVG path commands defining the glyph geometry
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VGint commandsCount;
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const VGubyte* commands;
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// OpenVG path coordinates defining the glyph geometry
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VGint coordinatesCount;
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const VGfloat* coordinates;
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// fill rule of glyph geometry
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VGFillRule fillRule;
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} Glyph;
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typedef struct {
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// the key representing two glyph indices ((leftGlyphIndex << 16) + rightGlyphIndex)
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VGuint key;
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// the kerning amount relative to the chars couple
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VGfloat x;
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VGfloat y;
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} KerningEntry;
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typedef struct {
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// OpenVG font object
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VGFont openvgHandle;
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// glyphs data
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const Glyph* glyphs;
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// number of glyphs
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const VGuint glyphsCount;
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// kerning table
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const KerningEntry* kerningTable;
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// number of kerning entries
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const VGuint kerningTableSize;
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} Font;
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#ifdef __cplusplus
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extern "C" {
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#endif
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// given a character code, return its glyph index
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VGint glyphIndexFromCharCode(const Font* font,
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const VGint charCode);
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// given a glyph index, return the associated Glyph structure
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const Glyph* glyphFromGlyphIndex(const Font* font,
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const VGint glyphIndex);
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// given a character code, return the associated Glyph structure
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const Glyph* glyphFromCharCode(const Font* font,
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const VGint charCode);
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// given a couple of glyph indices, return the relative kerning (NULL if kerning is zero)
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const KerningEntry* kerningFromGlyphIndices(const Font* font,
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const VGint leftGlyphIndex,
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const VGint rightGlyphIndex);
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// given a couple of character codes, return the relative kerning (NULL if kerning is zero)
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const KerningEntry* kerningFromCharCodes(const Font* font,
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const VGint leftCharCode,
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const VGint rightCharCode);
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// <20><><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>ߴ<EFBFBD>
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int vgTextSize(const Font* font, const char* str, VGfloat *cx, VGfloat *cy);
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int vgTextOut (const Font* font,
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const char* str,
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const VGbitfield paintModes);
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int vgFontInit (void);
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int vgFontExit (void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* VG_FONT_H */
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