Spaces:
Running
Running
| //======================================================================== | |
| // | |
| // 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, 2018, 2019 Albert Astals Cid <[email protected]> | |
| // Copyright (C) 2018 Oliver Sander <[email protected]> | |
| // | |
| // 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 | |
| // | |
| //======================================================================== | |
| struct SplashGlyphBitmap; | |
| struct SplashFontCacheTag; | |
| class SplashFontFile; | |
| class SplashPath; | |
| //------------------------------------------------------------------------ | |
| // Fractional positioning uses this many bits to the right of the | |
| // decimal points. | |
| //------------------------------------------------------------------------ | |
| // SplashFont | |
| //------------------------------------------------------------------------ | |
| class SplashFont | |
| { | |
| public: | |
| SplashFont(SplashFontFile *fontFileA, const SplashCoord *matA, const SplashCoord *textMatA, bool aaA); | |
| // This must be called after the constructor, so that the subclass | |
| // constructor has a chance to compute the bbox. | |
| void initCache(); | |
| virtual ~SplashFont(); | |
| SplashFont(const SplashFont &) = delete; | |
| SplashFont &operator=(const SplashFont &) = delete; | |
| SplashFontFile *getFontFile() { return fontFile; } | |
| // Return true if <this> matches the specified font file and matrix. | |
| bool matches(SplashFontFile *fontFileA, const SplashCoord *matA, const SplashCoord *textMatA) const | |
| { | |
| 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 bool 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 bool 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) | |
| bool aa; // anti-aliasing | |
| int xMin, yMin, xMax, yMax; // glyph bounding box | |
| unsigned char *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) | |
| }; | |