1 files changed, 201 insertions, 0 deletions
diff --git a/kpdf/xpdf/splash/SplashFont.cc b/kpdf/xpdf/splash/SplashFont.cc
new file mode 100644
index 00000000..4a91d5e8
--- /dev/null
+++ b/kpdf/xpdf/splash/SplashFont.cc
@@ -0,0 +1,201 @@
+//========================================================================
+//
+// SplashFont.cc
+//
+//========================================================================
+
+#include <aconf.h>
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <string.h>
+#include "gmem.h"
+#include "SplashMath.h"
+#include "SplashGlyphBitmap.h"
+#include "SplashFontFile.h"
+#include "SplashFont.h"
+
+//------------------------------------------------------------------------
+
+struct SplashFontCacheTag {
+  int c;
+  short xFrac, yFrac;		// x and y fractions
+  int mru;			// valid bit (0x80000000) and MRU index
+  int x, y, w, h;		// offset and size of glyph
+};
+
+//------------------------------------------------------------------------
+// SplashFont
+//------------------------------------------------------------------------
+
+SplashFont::SplashFont(SplashFontFile *fontFileA, SplashCoord *matA,
+		       SplashCoord *textMatA, GBool aaA) {
+  fontFile = fontFileA;
+  fontFile->incRefCnt();
+  mat[0] = matA[0];
+  mat[1] = matA[1];
+  mat[2] = matA[2];
+  mat[3] = matA[3];
+  textMat[0] = textMatA[0];
+  textMat[1] = textMatA[1];
+  textMat[2] = textMatA[2];
+  textMat[3] = textMatA[3];
+  aa = aaA;
+
+  cache = NULL;
+  cacheTags = NULL;
+
+  xMin = yMin = xMax = yMax = 0;
+}
+
+void SplashFont::initCache() {
+  int i;
+
+  // this should be (max - min + 1), but we add some padding to
+  // deal with rounding errors
+  glyphW = xMax - xMin + 3;
+  glyphH = yMax - yMin + 3;
+  if (aa) {
+    glyphSize = glyphW * glyphH;
+  } else {
+    glyphSize = ((glyphW + 7) >> 3) * glyphH;
+  }
+
+  // set up the glyph pixmap cache
+  cacheAssoc = 8;
+  if (glyphSize <= 256) {
+    cacheSets = 8;
+  } else if (glyphSize <= 512) {
+    cacheSets = 4;
+  } else if (glyphSize <= 1024) {
+    cacheSets = 2;
+  } else {
+    cacheSets = 1;
+  }
+  cache = (Guchar *)gmallocn_checkoverflow(cacheSets * cacheAssoc, glyphSize);
+  if (cache != NULL) {
+    cacheTags = (SplashFontCacheTag *)gmallocn(cacheSets * cacheAssoc,
+					     sizeof(SplashFontCacheTag));
+    for (i = 0; i < cacheSets * cacheAssoc; ++i) {
+      cacheTags[i].mru = i & (cacheAssoc - 1);
+    }
+  } else {
+    cacheAssoc = 0;
+  }
+}
+
+SplashFont::~SplashFont() {
+  fontFile->decRefCnt();
+  if (cache) {
+    gfree(cache);
+  }
+  if (cacheTags) {
+    gfree(cacheTags);
+  }
+}
+
+GBool SplashFont::getGlyph(int c, int xFrac, int yFrac,
+			   SplashGlyphBitmap *bitmap, int x0, int y0, SplashClip *clip, SplashClipResult *clipRes) {
+  SplashGlyphBitmap bitmap2;
+  int size;
+  Guchar *p;
+  int i, j, k;
+
+  // no fractional coordinates for large glyphs or non-anti-aliased
+  // glyphs
+  if (!aa || glyphH > 50) {
+    xFrac = yFrac = 0;
+  }
+
+  // check the cache
+  i = (c & (cacheSets - 1)) * cacheAssoc;
+  for (j = 0; j < cacheAssoc; ++j) {
+    if ((cacheTags[i+j].mru & 0x80000000) &&
+	cacheTags[i+j].c == c &&
+	(int)cacheTags[i+j].xFrac == xFrac &&
+	(int)cacheTags[i+j].yFrac == yFrac) {
+      bitmap->x = cacheTags[i+j].x;
+      bitmap->y = cacheTags[i+j].y;
+      bitmap->w = cacheTags[i+j].w;
+      bitmap->h = cacheTags[i+j].h;
+      for (k = 0; k < cacheAssoc; ++k) {
+	if (k != j &&
+	    (cacheTags[i+k].mru & 0x7fffffff) <
+	      (cacheTags[i+j].mru & 0x7fffffff)) {
+	  ++cacheTags[i+k].mru;
+	}
+      }
+      cacheTags[i+j].mru = 0x80000000;
+      bitmap->aa = aa;
+      bitmap->data = cache + (i+j) * glyphSize;
+      bitmap->freeData = gFalse;
+
+      *clipRes = clip->testRect(x0 - bitmap->x,
+                                y0 - bitmap->y,
+                                x0 - bitmap->x + bitmap->w - 1,
+                                y0 - bitmap->y + bitmap->h - 1);
+
+      return gTrue;
+    }
+  }
+
+  // generate the glyph bitmap
+  if (!makeGlyph(c, xFrac, yFrac, &bitmap2, x0, y0, clip, clipRes)) {
+    return gFalse;
+  }
+
+  if (*clipRes == splashClipAllOutside)
+  {
+    bitmap->freeData = gFalse;
+    if (bitmap2.freeData) gfree(bitmap2.data);
+    return gTrue;
+  }
+
+  // if the glyph doesn't fit in the bounding box, return a temporary
+  // uncached bitmap
+  if (bitmap2.w > glyphW || bitmap2.h > glyphH) {
+    *bitmap = bitmap2;
+    return gTrue;
+  }
+
+  // insert glyph pixmap in cache
+  if (aa) {
+    size = bitmap2.w * bitmap2.h;
+  } else {
+    size = ((bitmap2.w + 7) >> 3) * bitmap2.h;
+  }
+  p = NULL; // make gcc happy
+  if (cacheAssoc == 0)
+  {
+    // we had problems on the malloc of the cache, so ignore it
+    *bitmap = bitmap2;
+  }
+  else
+  {
+    for (j = 0; j < cacheAssoc; ++j) {
+      if ((cacheTags[i+j].mru & 0x7fffffff) == cacheAssoc - 1) {
+        cacheTags[i+j].mru = 0x80000000;
+        cacheTags[i+j].c = c;
+        cacheTags[i+j].xFrac = (short)xFrac;
+        cacheTags[i+j].yFrac = (short)yFrac;
+        cacheTags[i+j].x = bitmap2.x;
+        cacheTags[i+j].y = bitmap2.y;
+        cacheTags[i+j].w = bitmap2.w;
+        cacheTags[i+j].h = bitmap2.h;
+        p = cache + (i+j) * glyphSize;
+        memcpy(p, bitmap2.data, size);
+      } else {
+        ++cacheTags[i+j].mru;
+      }
+    }
+    *bitmap = bitmap2;
+    bitmap->data = p;
+    bitmap->freeData = gFalse;
+    if (bitmap2.freeData) {
+      gfree(bitmap2.data);
+    }
+  }
+  return gTrue;
+}