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+//========================================================================
+//
+// 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