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Diffstat (limited to 'pdf/xpdf/FTFont.cc')
-rw-r--r-- | pdf/xpdf/FTFont.cc | 703 |
1 files changed, 0 insertions, 703 deletions
diff --git a/pdf/xpdf/FTFont.cc b/pdf/xpdf/FTFont.cc deleted file mode 100644 index 1a5ecfa..0000000 --- a/pdf/xpdf/FTFont.cc +++ /dev/null @@ -1,703 +0,0 @@ -//======================================================================== -// -// FTFont.cc -// -// Copyright 2001-2003 Glyph & Cog, LLC -// -//======================================================================== - -#include <aconf.h> - -#if FREETYPE2 && (HAVE_FREETYPE_FREETYPE_H || HAVE_FREETYPE_H) - -#ifdef USE_GCC_PRAGMAS -#pragma implementation -#endif - -#include <math.h> -#include <string.h> -#include "gmem.h" -#include "freetype/ftoutln.h" -#include "freetype/internal/ftobjs.h" -#if 1 //~ cff cid->gid map -#include "freetype/internal/cfftypes.h" -#include "freetype/internal/tttypes.h" -#endif -#include "GlobalParams.h" -#include "GfxState.h" -#include "FTFont.h" - -//------------------------------------------------------------------------ - -FTFontEngine::FTFontEngine(Display *displayA, Visual *visualA, int depthA, - Colormap colormapA, GBool aaA): - SFontEngine(displayA, visualA, depthA, colormapA) { - - ok = gFalse; - if (FT_Init_FreeType(&lib)) { - return; - } - aa = aaA; - ok = gTrue; -} - -FTFontEngine::~FTFontEngine() { - FT_Done_FreeType(lib); -} - -//------------------------------------------------------------------------ - -FTFontFile::FTFontFile(FTFontEngine *engineA, char *fontFileName, - char **fontEnc, Gushort *codeToGID) { - char *name; - int i; - - ok = gFalse; - engine = engineA; - codeMap = NULL; - cidToGID = NULL; - cidToGIDLen = 0; - - if (FT_New_Face(engine->lib, fontFileName, 0, &face)) { - return; - } - - if (!strcmp(face->driver->root.clazz->module_name, "type1") || - !strcmp(face->driver->root.clazz->module_name, "cff")) { - mode = ftFontModeCodeMapDirect; - codeMap = (Guint *)gmalloc(256 * sizeof(Guint)); - for (i = 0; i < 256; ++i) { - codeMap[i] = 0; - if ((name = fontEnc[i])) { - codeMap[i] = FT_Get_Name_Index(face, name); - } - } - - } else { - mode = ftFontModeCodeMapDirect; - codeMap = (Guint *)gmalloc(256 * sizeof(Guint)); - for (i = 0; i < 256; ++i) { - codeMap[i] = (int)codeToGID[i]; - } - } - - ok = gTrue; -} - -FTFontFile::FTFontFile(FTFontEngine *engineA, char *fontFileName, - Gushort *cidToGIDA, int cidToGIDLenA, GBool embedded) { - int i; - - ok = gFalse; - engine = engineA; - codeMap = NULL; - cidToGID = NULL; - cidToGIDLen = 0; - - if (FT_New_Face(engine->lib, fontFileName, 0, &face)) { - return; - } - cidToGIDLen = cidToGIDLenA; - cidToGID = (Gushort *)gmalloc(cidToGIDLen * sizeof(Gushort)); - memcpy(cidToGID, cidToGIDA, cidToGIDLen * sizeof(Gushort)); - if (!strcmp(face->driver->root.clazz->module_name, "t1cid")) { - mode = ftFontModeCID; - } else if (!strcmp(face->driver->root.clazz->module_name, "cff")) { - mode = ftFontModeCFFCharset; - } else if (embedded) { - mode = ftFontModeCIDToGIDMap; - } else { - mode = ftFontModeUnicode; - for (i = 0; i < face->num_charmaps; ++i) { - if ((face->charmaps[i]->platform_id == 3 && - face->charmaps[i]->encoding_id == 1) || - face->charmaps[i]->platform_id == 0) { - break; - } - } - if (i == face->num_charmaps) { - i = 0; - } - FT_Set_Charmap(face, face->charmaps[i]); - } - ok = gTrue; -} - -FTFontFile::FTFontFile(FTFontEngine *engineA, char *fontFileName, - GBool embedded) { - int i; - - ok = gFalse; - engine = engineA; - codeMap = NULL; - cidToGID = NULL; - cidToGIDLen = 0; - - if (FT_New_Face(engine->lib, fontFileName, 0, &face)) { - return; - } - if (!strcmp(face->driver->root.clazz->module_name, "t1cid")) { - mode = ftFontModeCID; - } else if (embedded) { - mode = ftFontModeCFFCharset; - } else { - mode = ftFontModeUnicode; - for (i = 0; i < face->num_charmaps; ++i) { - if ((face->charmaps[i]->platform_id == 3 && - face->charmaps[i]->encoding_id == 1) || - face->charmaps[i]->platform_id == 0) { - break; - } - } - if (i == face->num_charmaps) { - i = 0; - } - FT_Set_Charmap(face, face->charmaps[i]); - } - ok = gTrue; -} - -FTFontFile::~FTFontFile() { - if (face) { - FT_Done_Face(face); - } - if (codeMap) { - gfree(codeMap); - } - if (cidToGID) { - gfree(cidToGID); - } -} - -//------------------------------------------------------------------------ - -FTFont::FTFont(FTFontFile *fontFileA, double *m) { - FTFontEngine *engine; - FT_Face face; - double size, div; - int x, xMin, xMax; - int y, yMin, yMax; - int i; - - ok = gFalse; - fontFile = fontFileA; - engine = fontFile->engine; - face = fontFile->face; - if (FT_New_Size(face, &sizeObj)) { - return; - } - face->size = sizeObj; - size = sqrt(m[2]*m[2] + m[3]*m[3]); - if (FT_Set_Pixel_Sizes(face, 0, (int)size)) { - return; - } - - div = face->bbox.xMax > 20000 ? 65536 : 1; - - // transform the four corners of the font bounding box -- the min - // and max values form the bounding box of the transformed font - x = (int)((m[0] * face->bbox.xMin + m[2] * face->bbox.yMin) / - (div * face->units_per_EM)); - xMin = xMax = x; - y = (int)((m[1] * face->bbox.xMin + m[3] * face->bbox.yMin) / - (div * face->units_per_EM)); - yMin = yMax = y; - x = (int)((m[0] * face->bbox.xMin + m[2] * face->bbox.yMax) / - (div * face->units_per_EM)); - if (x < xMin) { - xMin = x; - } else if (x > xMax) { - xMax = x; - } - y = (int)((m[1] * face->bbox.xMin + m[3] * face->bbox.yMax) / - (div * face->units_per_EM)); - if (y < yMin) { - yMin = y; - } else if (y > yMax) { - yMax = y; - } - x = (int)((m[0] * face->bbox.xMax + m[2] * face->bbox.yMin) / - (div * face->units_per_EM)); - if (x < xMin) { - xMin = x; - } else if (x > xMax) { - xMax = x; - } - y = (int)((m[1] * face->bbox.xMax + m[3] * face->bbox.yMin) / - (div * face->units_per_EM)); - if (y < yMin) { - yMin = y; - } else if (y > yMax) { - yMax = y; - } - x = (int)((m[0] * face->bbox.xMax + m[2] * face->bbox.yMax) / - (div * face->units_per_EM)); - if (x < xMin) { - xMin = x; - } else if (x > xMax) { - xMax = x; - } - y = (int)((m[1] * face->bbox.xMax + m[3] * face->bbox.yMax) / - (div * face->units_per_EM)); - 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); - } - // this should be (max - min + 1), but we add some padding to - // deal with rounding errors, bogus bboxes, etc. - glyphW = xMax - xMin + 3; - glyphW += glyphW >> 1; - glyphH = yMax - yMin + 3; - glyphH += glyphH >> 1; - if (engine->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 *)gmalloc(cacheSets * cacheAssoc * glyphSize); - cacheTags = (FTFontCacheTag *)gmalloc(cacheSets * cacheAssoc * - sizeof(FTFontCacheTag)); - for (i = 0; i < cacheSets * cacheAssoc; ++i) { - cacheTags[i].mru = i & (cacheAssoc - 1); - } - - // create the XImage - if (!(image = XCreateImage(engine->display, engine->visual, engine->depth, - ZPixmap, 0, NULL, glyphW, glyphH, 8, 0))) { - return; - } - image->data = (char *)gmalloc(glyphH * image->bytes_per_line); - - // compute the transform matrix - matrix.xx = (FT_Fixed)((m[0] / size) * 65536); - matrix.yx = (FT_Fixed)((m[1] / size) * 65536); - matrix.xy = (FT_Fixed)((m[2] / size) * 65536); - matrix.yy = (FT_Fixed)((m[3] / size) * 65536); - - ok = gTrue; -} - -FTFont::~FTFont() { - gfree(cacheTags); - gfree(cache); - gfree(image->data); - image->data = NULL; - XDestroyImage(image); -} - -GBool FTFont::drawChar(Drawable d, int w, int h, GC gc, - int x, int y, int r, int g, int b, - CharCode c, Unicode u) { - FTFontEngine *engine; - XColor xcolor; - int bgR, bgG, bgB; - Gulong colors[5]; - Guchar *bitmap, *p; - GBool tempBitmap; - XImage *img; - int pix; - int xOffset, yOffset, x0, y0, x1, y1, gw, gh, w0, h0; - int xx, yy, xx1; - - engine = fontFile->engine; - - // no Unicode index for this char - don't draw anything - if (fontFile->mode == ftFontModeUnicode && u == 0) { - return gFalse; - } - - // generate the glyph pixmap - if (!(bitmap = getGlyphPixmap(c, u, &xOffset, &yOffset, &gw, &gh, - &tempBitmap))) { - return gFalse; - } - - // compute: (x0,y0) = position in destination drawable - // (x1,y1) = position in glyph image - // (w0,h0) = size of image transfer - x0 = x - xOffset; - y0 = y - yOffset; - x1 = 0; - y1 = 0; - w0 = gw; - h0 = gh; - if (x0 < 0) { - x1 = -x0; - w0 += x0; - x0 = 0; - } - if (x0 + w0 > w) { - w0 = w - x0; - } - if (w0 < 0) { - goto done; - } - if (y0 < 0) { - y1 = -y0; - h0 += y0; - y0 = 0; - } - if (y0 + h0 > h) { - h0 = h - y0; - } - if (h0 < 0) { - goto done; - } - - // getGlyphPixmap may have returned a larger-than-cache-entry - // bitmap, in which case we need to allocate a temporary XImage here - if (tempBitmap) { - if (!(img = XCreateImage(engine->display, engine->visual, engine->depth, - ZPixmap, 0, NULL, gw, gh, 8, 0))) { - goto done; - } - img->data = (char *)gmalloc(gh * img->bytes_per_line); - } else { - img = image; - } - - // read the X image - XGetSubImage(engine->display, d, x0, y0, w0, h0, (1 << engine->depth) - 1, - ZPixmap, img, x1, y1); - - if (engine->aa) { - - // compute the colors - xcolor.pixel = XGetPixel(img, x1 + w0/2, y1 + h0/2); - XQueryColor(engine->display, engine->colormap, &xcolor); - bgR = xcolor.red; - bgG = xcolor.green; - bgB = xcolor.blue; - colors[1] = engine->findColor((r + 3*bgR) / 4, - (g + 3*bgG) / 4, - (b + 3*bgB) / 4); - colors[2] = engine->findColor((r + bgR) / 2, - (g + bgG) / 2, - (b + bgB) / 2); - colors[3] = engine->findColor((3*r + bgR) / 4, - (3*g + bgG) / 4, - (3*b + bgB) / 4); - colors[4] = engine->findColor(r, g, b); - - // stuff the glyph pixmap into the X image - p = bitmap; - for (yy = 0; yy < gh; ++yy) { - for (xx = 0; xx < gw; ++xx) { - pix = *p++ & 0xff; - // this is a heuristic which seems to produce decent - // results -- the linear mapping would be: - // pix = (pix * 5) / 256; - pix = ((pix + 10) * 5) / 256; - if (pix > 4) { - pix = 4; - } - if (pix > 0) { - XPutPixel(img, xx, yy, colors[pix]); - } - } - } - - } else { - - // one color - colors[1] = engine->findColor(r, g, b); - - // stuff the glyph bitmap into the X image - p = bitmap; - for (yy = 0; yy < gh; ++yy) { - for (xx = 0; xx < gw; xx += 8) { - pix = *p++; - for (xx1 = xx; xx1 < xx + 8 && xx1 < gw; ++xx1) { - if (pix & 0x80) { - XPutPixel(img, xx1, yy, colors[1]); - } - pix <<= 1; - } - } - } - - } - - // draw the X image - XPutImage(engine->display, d, gc, img, x1, y1, x0, y0, w0, h0); - - if (tempBitmap) { - gfree(img->data); - img->data = NULL; - XDestroyImage(img); - } - done: - if (tempBitmap) { - gfree(bitmap); - } - return gTrue; -} - -Guchar *FTFont::getGlyphPixmap(CharCode c, Unicode u, - int *x, int *y, int *w, int *h, - GBool *tempBitmap) { - FT_GlyphSlot slot; - FT_UInt idx; - int rowSize; - int i, j, k; - Guchar *ret, *p, *q; - - // check the cache - i = (c & (cacheSets - 1)) * cacheAssoc; - for (j = 0; j < cacheAssoc; ++j) { - if ((cacheTags[i+j].mru & 0x8000) && cacheTags[i+j].code == c) { - *x = cacheTags[i+j].x; - *y = cacheTags[i+j].y; - *w = cacheTags[i+j].w; - *h = cacheTags[i+j].h; - for (k = 0; k < cacheAssoc; ++k) { - if (k != j && - (cacheTags[i+k].mru & 0x7fff) < (cacheTags[i+j].mru & 0x7fff)) { - ++cacheTags[i+k].mru; - } - } - cacheTags[i+j].mru = 0x8000; - *tempBitmap = gFalse; - return cache + (i+j) * glyphSize; - } - } - - // generate the glyph pixmap or bitmap - fontFile->face->size = sizeObj; - FT_Set_Transform(fontFile->face, &matrix, NULL); - slot = fontFile->face->glyph; - idx = getGlyphIndex(c, u); - // if we have the FT2 bytecode interpreter, autohinting won't be used -#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER - if (FT_Load_Glyph(fontFile->face, idx, - fontFile->engine->aa ? FT_LOAD_NO_BITMAP - : FT_LOAD_DEFAULT)) { - return gFalse; - } -#else - // FT2's autohinting doesn't always work very well (especially with - // font subsets), so turn it off if anti-aliasing is enabled; if - // anti-aliasing is disabled, this seems to be a tossup - some fonts - // look better with hinting, some without, so leave hinting on - if (FT_Load_Glyph(fontFile->face, idx, - fontFile->engine->aa ? FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP - : FT_LOAD_DEFAULT)) { - return gFalse; - } -#endif - if (FT_Render_Glyph(slot, - fontFile->engine->aa ? ft_render_mode_normal : - ft_render_mode_mono)) { - return gFalse; - } - - // copy the glyph into the cache or a temporary bitmap - *x = -slot->bitmap_left; - *y = slot->bitmap_top; - *w = slot->bitmap.width; - *h = slot->bitmap.rows; - if (fontFile->engine->aa) { - rowSize = *w; - } else { - rowSize = (*w + 7) >> 3; - } - if (*w > glyphW || *h > glyphH) { - // the glyph doesn't fit in the bounding box -- return a - // temporary, uncached bitmap (this shouldn't happen but some - // fonts have incorrect bboxes) - ret = (Guchar *)gmalloc(*h * rowSize); - *tempBitmap = gTrue; - } else { - // store glyph pixmap in cache - ret = NULL; // make gcc happy - for (j = 0; j < cacheAssoc; ++j) { - if ((cacheTags[i+j].mru & 0x7fff) == cacheAssoc - 1) { - cacheTags[i+j].mru = 0x8000; - cacheTags[i+j].code = c; - cacheTags[i+j].x = *x; - cacheTags[i+j].y = *y; - cacheTags[i+j].w = *w; - cacheTags[i+j].h = *h; - ret = cache + (i+j) * glyphSize; - } else { - ++cacheTags[i+j].mru; - } - } - *tempBitmap = gFalse; - } - for (k = 0, p = ret, q = slot->bitmap.buffer; - k < slot->bitmap.rows; - ++k, p += rowSize, q += slot->bitmap.pitch) { - memcpy(p, q, rowSize); - } - return ret; -} - -GBool FTFont::getCharPath(CharCode c, Unicode u, GfxState *state) { - static FT_Outline_Funcs outlineFuncs = { - &charPathMoveTo, - &charPathLineTo, - &charPathConicTo, - &charPathCubicTo, - 0, 0 - }; - FT_GlyphSlot slot; - FT_UInt idx; - FT_Glyph glyph; - - fontFile->face->size = sizeObj; - FT_Set_Transform(fontFile->face, &matrix, NULL); - slot = fontFile->face->glyph; - idx = getGlyphIndex(c, u); -#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER - if (FT_Load_Glyph(fontFile->face, idx, FT_LOAD_DEFAULT)) { - return gFalse; - } -#else - // FT2's autohinting doesn't always work very well (especially with - // font subsets), so turn it off if anti-aliasing is enabled; if - // anti-aliasing is disabled, this seems to be a tossup - some fonts - // look better with hinting, some without, so leave hinting on - if (FT_Load_Glyph(fontFile->face, idx, - fontFile->engine->aa ? FT_LOAD_NO_HINTING - : FT_LOAD_DEFAULT)) { - return gFalse; - } -#endif - if (FT_Get_Glyph(slot, &glyph)) { - return gFalse; - } - FT_Outline_Decompose(&((FT_OutlineGlyph)glyph)->outline, - &outlineFuncs, state); - return gTrue; -} - -int FTFont::charPathMoveTo(FT_Vector *pt, void *state) { - ((GfxState *)state)->moveTo(pt->x / 64.0, -pt->y / 64.0); - return 0; -} - -int FTFont::charPathLineTo(FT_Vector *pt, void *state) { - ((GfxState *)state)->lineTo(pt->x / 64.0, -pt->y / 64.0); - return 0; -} - -int FTFont::charPathConicTo(FT_Vector *ctrl, FT_Vector *pt, void *state) { - double x0, y0, x1, y1, x2, y2, x3, y3, xc, yc; - - x0 = ((GfxState *)state)->getCurX(); - y0 = ((GfxState *)state)->getCurY(); - xc = ctrl->x / 64.0; - yc = -ctrl->y / 64.0; - x3 = pt->x / 64.0; - y3 = -pt->y / 64.0; - - // A second-order Bezier curve is defined by two endpoints, p0 and - // p3, and one control point, pc: - // - // p(t) = (1-t)^2*p0 + t*(1-t)*pc + t^2*p3 - // - // A third-order Bezier curve is defined by the same two endpoints, - // p0 and p3, and two control points, p1 and p2: - // - // p(t) = (1-t)^3*p0 + 3t*(1-t)^2*p1 + 3t^2*(1-t)*p2 + t^3*p3 - // - // Applying some algebra, we can convert a second-order curve to a - // third-order curve: - // - // p1 = (1/3) * (p0 + 2pc) - // p2 = (1/3) * (2pc + p3) - - x1 = (1.0 / 3.0) * (x0 + 2 * xc); - y1 = (1.0 / 3.0) * (y0 + 2 * yc); - x2 = (1.0 / 3.0) * (2 * xc + x3); - y2 = (1.0 / 3.0) * (2 * yc + y3); - - ((GfxState *)state)->curveTo(x1, y1, x2, y2, x3, y3); - return 0; -} - -int FTFont::charPathCubicTo(FT_Vector *ctrl1, FT_Vector *ctrl2, - FT_Vector *pt, void *state) { - ((GfxState *)state)->curveTo(ctrl1->x / 64.0, -ctrl1->y / 64.0, - ctrl2->x / 64.0, -ctrl2->y / 64.0, - pt->x / 64.0, -pt->y / 64.0); - return 0; -} - -FT_UInt FTFont::getGlyphIndex(CharCode c, Unicode u) { - FT_UInt idx; - int j; - - idx = 0; // make gcc happy - switch (fontFile->mode) { - case ftFontModeUnicode: - idx = FT_Get_Char_Index(fontFile->face, (FT_ULong)u); - break; - case ftFontModeCodeMapDirect: - if (c <= 0xff) { - idx = (FT_UInt)fontFile->codeMap[c]; - } else { - idx = 0; - } - break; - case ftFontModeCIDToGIDMap: - if (fontFile->cidToGIDLen) { - if ((int)c < fontFile->cidToGIDLen) { - idx = (FT_UInt)fontFile->cidToGID[c]; - } else { - idx = (FT_UInt)0; - } - } else { - idx = (FT_UInt)c; - } - break; - case ftFontModeCFFCharset: -#if 1 //~ cff cid->gid map - { -#if FREETYPE_MAJOR == 2 && FREETYPE_MINOR == 0 - CFF_Font *cff = (CFF_Font *)((TT_Face)fontFile->face)->extra.data; -#else - CFF_Font cff = (CFF_Font)((TT_Face)fontFile->face)->extra.data; -#endif - idx = 0; - for (j = 0; j < (int)cff->num_glyphs; ++j) { - if (cff->charset.sids[j] == c) { - idx = j; - break; - } - } - } -#endif - break; - case ftFontModeCID: - idx = c; - break; - } - return idx; -} - -#endif // FREETYPE2 && (HAVE_FREETYPE_FREETYPE_H || HAVE_FREETYPE_H) |