| //======================================================================== |
| // |
| // SplashFont.h |
| // |
| //======================================================================== |
| |
| //======================================================================== |
| // |
| // Modified under the Poppler project - http://poppler.freedesktop.org |
| // |
| // All changes made under the Poppler project to this file are licensed |
| // under GPL version 2 or later |
| // |
| // Copyright (C) 2007-2008 Albert Astals Cid <aacid@kde.org> |
| // |
| // To see a description of the changes please see the Changelog file that |
| // came with your tarball or type make ChangeLog if you are building from git |
| // |
| //======================================================================== |
| |
| #ifndef SPLASHFONT_H |
| #define SPLASHFONT_H |
| |
| #ifdef USE_GCC_PRAGMAS |
| #pragma interface |
| #endif |
| |
| #include "goo/gtypes.h" |
| #include "SplashTypes.h" |
| #include "SplashClip.h" |
| |
| struct SplashGlyphBitmap; |
| struct SplashFontCacheTag; |
| class SplashFontFile; |
| class SplashPath; |
| |
| //------------------------------------------------------------------------ |
| |
| // Fractional positioning uses this many bits to the right of the |
| // decimal points. |
| #define splashFontFractionBits 2 |
| #define splashFontFraction (1 << splashFontFractionBits) |
| #define splashFontFractionMul \ |
| ((SplashCoord)1 / (SplashCoord)splashFontFraction) |
| |
| //------------------------------------------------------------------------ |
| // SplashFont |
| //------------------------------------------------------------------------ |
| |
| class SplashFont { |
| public: |
| |
| SplashFont(SplashFontFile *fontFileA, SplashCoord *matA, |
| SplashCoord *textMatA, GBool aaA); |
| |
| // This must be called after the constructor, so that the subclass |
| // constructor has a chance to compute the bbox. |
| void initCache(); |
| |
| virtual ~SplashFont(); |
| |
| SplashFontFile *getFontFile() { return fontFile; } |
| |
| // Return true if <this> matches the specified font file and matrix. |
| GBool matches(SplashFontFile *fontFileA, SplashCoord *matA, |
| SplashCoord *textMatA) { |
| return fontFileA == fontFile && |
| matA[0] == mat[0] && matA[1] == mat[1] && |
| matA[2] == mat[2] && matA[3] == mat[3] && |
| textMatA[0] == textMat[0] && textMatA[1] == textMat[1] && |
| textMatA[2] == textMat[2] && textMatA[3] == textMat[3]; |
| } |
| |
| // Get a glyph - this does a cache lookup first, and if not found, |
| // creates a new bitmap and adds it to the cache. The <xFrac> and |
| // <yFrac> values are splashFontFractionBits bits each, representing |
| // the numerators of fractions in [0, 1), where the denominator is |
| // splashFontFraction = 1 << splashFontFractionBits. Subclasses |
| // should override this to zero out xFrac and/or yFrac if they don't |
| // support fractional coordinates. |
| virtual GBool getGlyph(int c, int xFrac, int yFrac, |
| SplashGlyphBitmap *bitmap, int x0, int y0, SplashClip *clip, SplashClipResult *clipRes); |
| |
| // Rasterize a glyph. The <xFrac> and <yFrac> values are the same |
| // as described for getGlyph. |
| virtual GBool makeGlyph(int c, int xFrac, int yFrac, |
| SplashGlyphBitmap *bitmap, int x0, int y0, SplashClip *clip, SplashClipResult *clipRes) = 0; |
| |
| // Return the path for a glyph. |
| virtual SplashPath *getGlyphPath(int c) = 0; |
| |
| // Return the advance of a glyph. (in 0..1 range) |
| // < 0 means not known |
| virtual double getGlyphAdvance(int c) { return -1; } |
| |
| // Return the font transform matrix. |
| SplashCoord *getMatrix() { return mat; } |
| |
| // Return the glyph bounding box. |
| void getBBox(int *xMinA, int *yMinA, int *xMaxA, int *yMaxA) |
| { *xMinA = xMin; *yMinA = yMin; *xMaxA = xMax; *yMaxA = yMax; } |
| |
| protected: |
| |
| SplashFontFile *fontFile; |
| SplashCoord mat[4]; // font transform matrix |
| // (text space -> device space) |
| SplashCoord textMat[4]; // text transform matrix |
| // (text space -> user space) |
| GBool aa; // anti-aliasing |
| int xMin, yMin, xMax, yMax; // glyph bounding box |
| Guchar *cache; // glyph bitmap cache |
| SplashFontCacheTag * // cache tags |
| cacheTags; |
| int glyphW, glyphH; // size of glyph bitmaps |
| int glyphSize; // size of glyph bitmaps, in bytes |
| int cacheSets; // number of sets in cache |
| int cacheAssoc; // cache associativity (glyphs per set) |
| }; |
| |
| #endif |