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-rw-r--r--kpdf/xpdf/splash/SplashT1Font.cc292
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diff --git a/kpdf/xpdf/splash/SplashT1Font.cc b/kpdf/xpdf/splash/SplashT1Font.cc
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+//========================================================================
+//
+// SplashT1Font.cc
+//
+//========================================================================
+
+#include <aconf.h>
+
+#if HAVE_T1LIB_H
+
+#ifdef USE_GCC_PRAGMAS
+#pragma implementation
+#endif
+
+#include <stdlib.h>
+#include <t1lib.h>
+#include "gmem.h"
+#include "SplashMath.h"
+#include "SplashGlyphBitmap.h"
+#include "SplashPath.h"
+#include "SplashT1FontEngine.h"
+#include "SplashT1FontFile.h"
+#include "SplashT1Font.h"
+
+//------------------------------------------------------------------------
+
+static Guchar bitReverse[256] = {
+ 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
+ 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
+ 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
+ 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
+ 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
+ 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
+ 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
+ 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
+ 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
+ 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
+ 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
+ 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
+ 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
+ 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
+ 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
+ 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
+ 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
+ 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
+ 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
+ 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
+ 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
+ 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
+ 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
+ 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
+ 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
+ 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
+ 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
+ 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
+ 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
+ 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
+ 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
+ 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
+};
+
+//------------------------------------------------------------------------
+// SplashT1Font
+//------------------------------------------------------------------------
+
+SplashT1Font::SplashT1Font(SplashT1FontFile *fontFileA, SplashCoord *matA,
+ SplashCoord *textMatA):
+ SplashFont(fontFileA, matA, textMatA, fontFileA->engine->aa)
+{
+ T1_TMATRIX matrix;
+ BBox bbox;
+ SplashCoord bbx0, bby0, bbx1, bby1;
+ int x, y;
+
+ t1libID = T1_CopyFont(fontFileA->t1libID);
+ outlineID = -1;
+
+ // compute font size
+ size = (float)splashSqrt(mat[2]*mat[2] + mat[3]*mat[3]);
+
+ // transform the four corners of the font bounding box -- the min
+ // and max values form the bounding box of the transformed font
+ bbox = T1_GetFontBBox(t1libID);
+ bbx0 = 0.001 * bbox.llx;
+ bby0 = 0.001 * bbox.lly;
+ bbx1 = 0.001 * bbox.urx;
+ bby1 = 0.001 * bbox.ury;
+ // some fonts are completely broken, so we fake it (with values
+ // large enough that most glyphs should fit)
+ if (bbx0 == 0 && bby0 == 0 && bbx1 == 0 && bby1 == 0) {
+ bbx0 = bby0 = -0.5;
+ bbx1 = bby1 = 1.5;
+ }
+ x = (int)(mat[0] * bbx0 + mat[2] * bby0);
+ xMin = xMax = x;
+ y = (int)(mat[1] * bbx0 + mat[3] * bby0);
+ yMin = yMax = y;
+ x = (int)(mat[0] * bbx0 + mat[2] * bby1);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ y = (int)(mat[1] * bbx0 + mat[3] * bby1);
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ x = (int)(mat[0] * bbx1 + mat[2] * bby0);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ y = (int)(mat[1] * bbx1 + mat[3] * bby0);
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ x = (int)(mat[0] * bbx1 + mat[2] * bby1);
+ if (x < xMin) {
+ xMin = x;
+ } else if (x > xMax) {
+ xMax = x;
+ }
+ y = (int)(mat[1] * bbx1 + mat[3] * bby1);
+ if (y < yMin) {
+ yMin = y;
+ } else if (y > yMax) {
+ yMax = y;
+ }
+ // This is a kludge: some buggy PDF generators embed fonts with
+ // zero bounding boxes.
+ if (xMax == xMin) {
+ xMin = 0;
+ xMax = (int)size;
+ }
+ if (yMax == yMin) {
+ yMin = 0;
+ yMax = (int)(1.2 * size);
+ }
+ // Another kludge: an unusually large xMin or yMin coordinate is
+ // probably wrong.
+ if (xMin > 0) {
+ xMin = 0;
+ }
+ if (yMin > 0) {
+ yMin = 0;
+ }
+ // Another kludge: t1lib doesn't correctly handle fonts with
+ // real (non-integer) bounding box coordinates.
+ if (xMax - xMin > 5000) {
+ xMin = 0;
+ xMax = (int)size;
+ }
+ if (yMax - yMin > 5000) {
+ yMin = 0;
+ yMax = (int)(1.2 * size);
+ }
+
+ // transform the font
+ matrix.cxx = (double)mat[0] / size;
+ matrix.cxy = (double)mat[1] / size;
+ matrix.cyx = (double)mat[2] / size;
+ matrix.cyy = (double)mat[3] / size;
+ T1_TransformFont(t1libID, &matrix);
+}
+
+SplashT1Font::~SplashT1Font() {
+ T1_DeleteFont(t1libID);
+ if (outlineID >= 0) {
+ T1_DeleteFont(outlineID);
+ }
+}
+
+GBool SplashT1Font::getGlyph(int c, int xFrac, int yFrac,
+ SplashGlyphBitmap *bitmap, int x0, int y0, SplashClip *clip, SplashClipResult *clipRes) {
+ return SplashFont::getGlyph(c, 0, 0, bitmap, x0, y0, clip, clipRes);
+}
+
+GBool SplashT1Font::makeGlyph(int c, int xFrac, int yFrac,
+ SplashGlyphBitmap *bitmap, int x0, int y0, SplashClip *clip, SplashClipResult *clipRes) {
+ GLYPH *glyph;
+ int n, i;
+
+ if (aa) {
+ glyph = T1_AASetChar(t1libID, c, size, NULL);
+ } else {
+ glyph = T1_SetChar(t1libID, c, size, NULL);
+ }
+ if (!glyph) {
+ return gFalse;
+ }
+
+ bitmap->x = -glyph->metrics.leftSideBearing;
+ bitmap->y = glyph->metrics.ascent;
+ bitmap->w = glyph->metrics.rightSideBearing - glyph->metrics.leftSideBearing;
+ bitmap->h = glyph->metrics.ascent - glyph->metrics.descent;
+ bitmap->aa = aa;
+ if (aa) {
+ bitmap->data = (Guchar *)glyph->bits;
+ bitmap->freeData = gFalse;
+ } else {
+ n = bitmap->h * ((bitmap->w + 7) >> 3);
+ bitmap->data = (Guchar *)gmalloc(n);
+ for (i = 0; i < n; ++i) {
+ bitmap->data[i] = bitReverse[glyph->bits[i] & 0xff];
+ }
+ bitmap->freeData = gTrue;
+ }
+
+ *clipRes = clip->testRect(x0 - bitmap->x,
+ y0 - bitmap->y,
+ x0 - bitmap->x + bitmap->w - 1,
+ y0 - bitmap->y + bitmap->h - 1);
+
+ return gTrue;
+}
+
+SplashPath *SplashT1Font::getGlyphPath(int c) {
+ T1_TMATRIX matrix;
+ SplashPath *path;
+ T1_OUTLINE *outline;
+ T1_PATHSEGMENT *seg;
+ T1_BEZIERSEGMENT *bez;
+ SplashCoord x, y, x1, y1;
+ GBool needClose;
+
+ if (outlineID < 0) {
+ outlineID = T1_CopyFont(((SplashT1FontFile *)fontFile)->t1libID);
+ outlineSize = (float)splashSqrt(textMat[2]*textMat[2] +
+ textMat[3]*textMat[3]);
+ matrix.cxx = (double)textMat[0] / outlineSize;
+ matrix.cxy = (double)textMat[1] / outlineSize;
+ matrix.cyx = (double)textMat[2] / outlineSize;
+ matrix.cyy = (double)textMat[3] / outlineSize;
+ // t1lib doesn't seem to handle small sizes correctly here, so set
+ // the size to 1000, and scale the resulting coordinates later
+ outlineMul = (float)(outlineSize / 65536000.0);
+ outlineSize = 1000;
+ T1_TransformFont(outlineID, &matrix);
+ }
+
+ path = new SplashPath();
+ if ((outline = T1_GetCharOutline(outlineID, c, outlineSize, NULL))) {
+ x = 0;
+ y = 0;
+ needClose = gFalse;
+ for (seg = outline; seg; seg = seg->link) {
+ switch (seg->type) {
+ case T1_PATHTYPE_MOVE:
+ if (needClose) {
+ path->close();
+ needClose = gFalse;
+ }
+ x += seg->dest.x * outlineMul;
+ y += seg->dest.y * outlineMul;
+ path->moveTo(x, -y);
+ break;
+ case T1_PATHTYPE_LINE:
+ x += seg->dest.x * outlineMul;
+ y += seg->dest.y * outlineMul;
+ path->lineTo(x, -y);
+ needClose = gTrue;
+ break;
+ case T1_PATHTYPE_BEZIER:
+ bez = (T1_BEZIERSEGMENT *)seg;
+ x1 = x + (SplashCoord)(bez->dest.x * outlineMul);
+ y1 = y + (SplashCoord)(bez->dest.y * outlineMul);
+ path->curveTo(x + (SplashCoord)(bez->B.x * outlineMul),
+ -(y + (SplashCoord)(bez->B.y * outlineMul)),
+ x + (SplashCoord)(bez->C.x * outlineMul),
+ -(y + (SplashCoord)(bez->C.y * outlineMul)),
+ x1, -y1);
+ x = x1;
+ y = y1;
+ needClose = gTrue;
+ break;
+ }
+ }
+ if (needClose) {
+ path->close();
+ }
+ T1_FreeOutline(outline);
+ }
+
+ return path;
+}
+
+#endif // HAVE_T1LIB_H
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-25 18:01:08 +0000