/****************************************************************************\ Part of the XeTeX typesetting system copyright (c) 1994-2008 by SIL International copyright (c) 2009 by Jonathan Kew Written by Jonathan Kew Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the copyright holders shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the copyright holders. \****************************************************************************/ /* * file name: XeTeXFontInst_FT2.cpp * * created on: 2005-10-25 * created by: Jonathan Kew */ #include "XeTeXFontInst_FT2.h" #include FT_TRUETYPE_TABLES_H #include FT_TYPE1_TABLES_H #include FT_GLYPH_H #include FT_Library gFreeTypeLibrary = 0; XeTeXFontInst_FT2::XeTeXFontInst_FT2(const char* pathname, int index, float pointSize, LEErrorCode &status) : XeTeXFontInst(pointSize, status) , face(0) , fFreeTypeOnly(false) { if (LE_FAILURE(status)) { return; } FT_Error err; if (!gFreeTypeLibrary) { err = FT_Init_FreeType(&gFreeTypeLibrary); if (err != 0) { fprintf(stderr, "FreeType initialization failed! (%d)\n", err); exit(1); } } err = FT_New_Face(gFreeTypeLibrary, (char*)pathname, index, &face); if (err != 0) { status = LE_FONT_FILE_NOT_FOUND_ERROR; return; } /* for non-sfnt-packaged fonts (presumably Type 1), see if there is an AFM file we can attach */ if (index == 0 && !FT_IS_SFNT(face)) { char* afm = new char[strlen((const char*)pathname) + 5]; // room to append ".afm" strcpy(afm, (const char*)pathname); char* p = strrchr(afm, '.'); if (p == NULL || strlen(p) != 4 || tolower(*(p+1)) != 'p' || tolower(*(p+2)) != 'f') strcat(afm, ".afm"); // append .afm if the extension didn't seem to be .pf[ab] else strcpy(p, ".afm"); // else replace extension with .afm FT_Attach_File(face, afm); // ignore error code; AFM might not exist delete[] afm; fFreeTypeOnly = true; } initialize(status); if (LE_FAILURE(status)) return; char buf[20]; if (index > 0) sprintf(buf, ":%d", index); else buf[0] = 0; fFilename = new char[strlen(pathname) + 2 + strlen(buf) + 1]; sprintf(fFilename, "[%s%s]", pathname, buf); } XeTeXFontInst_FT2::~XeTeXFontInst_FT2() { if (face != 0) { FT_Done_Face(face); face = 0; } } void XeTeXFontInst_FT2::initialize(LEErrorCode &status) { if (face == 0) { status = LE_FONT_FILE_NOT_FOUND_ERROR; return; } XeTeXFontInst::initialize(status); if (LE_FAILURE(status)) { /* font can ONLY be used via FreeType APIs, not direct table access */ fFreeTypeOnly = true; status = LE_NO_ERROR; /* fill in fields that XeTeXFontInst::initialize failed to get for us */ fUnitsPerEM = face->units_per_EM; fAscent = yUnitsToPoints(face->ascender); fDescent = yUnitsToPoints(face->descender); // fLeading = ; fItalicAngle = 0; PS_FontInfoRec font_info; if (FT_Get_PS_Font_Info(face, &font_info) == 0) { // will return error if it wasn't a PS font fItalicAngle = font_info.italic_angle; } } return; } const void *XeTeXFontInst_FT2::readTable(LETag tag, le_uint32 *length) const { *length = 0; FT_ULong tmpLength = 0; FT_Error err = FT_Load_Sfnt_Table(face, tag, 0, NULL, &tmpLength); if (err != 0) return NULL; void* table = LE_NEW_ARRAY(char, tmpLength); if (table != NULL) { err = FT_Load_Sfnt_Table(face, tag, 0, (FT_Byte*)table, &tmpLength); if (err != 0) { LE_DELETE_ARRAY(table); return NULL; } *length = tmpLength; } return table; } void XeTeXFontInst_FT2::getGlyphBounds(LEGlyphID gid, GlyphBBox* bbox) { bbox->xMin = bbox->yMin = bbox->xMax = bbox->yMax = 0.0; FT_Error err = FT_Load_Glyph(face, gid, FT_LOAD_NO_SCALE); if (err != 0) return; FT_Glyph glyph; err = FT_Get_Glyph(face->glyph, &glyph); if (err == 0) { FT_BBox ft_bbox; FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_UNSCALED, &ft_bbox); bbox->xMin = ft_bbox.xMin * fPointSize / fUnitsPerEM; bbox->yMin = ft_bbox.yMin * fPointSize / fUnitsPerEM; bbox->xMax = ft_bbox.xMax * fPointSize / fUnitsPerEM; bbox->yMax = ft_bbox.yMax * fPointSize / fUnitsPerEM; FT_Done_Glyph(glyph); } } LEGlyphID XeTeXFontInst_FT2::mapCharToGlyph(LEUnicode32 ch) const { if (!fFreeTypeOnly) return XeTeXFontInst::mapCharToGlyph(ch); return FT_Get_Char_Index(face, ch); } le_uint16 XeTeXFontInst_FT2::getNumGlyphs() const { return face->num_glyphs; } void XeTeXFontInst_FT2::getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const { if (!fFreeTypeOnly) XeTeXFontInst::getGlyphAdvance(glyph, advance); else { FT_Error err = FT_Load_Glyph(face, glyph, FT_LOAD_NO_SCALE); if (err != 0) { advance.fX = advance.fY = 0; } else { advance.fX = fVertical ? 0 : face->glyph->metrics.horiAdvance * fPointSize / fUnitsPerEM; advance.fY = fVertical ? face->glyph->metrics.vertAdvance * fPointSize / fUnitsPerEM : 0; } } } LEGlyphID XeTeXFontInst_FT2::mapGlyphToIndex(const char* glyphName) const { LEGlyphID rval = FT_Get_Name_Index(face, const_cast(glyphName)); if (rval == 0) rval = XeTeXFontInst::mapGlyphToIndex(glyphName); return rval; } void XeTeXFontInst_FT2::getKernPair(LEGlyphID leftGlyph, LEGlyphID rightGlyph, LEPoint &kern) const { FT_Vector kerning; if (FT_Get_Kerning(face, leftGlyph, rightGlyph, FT_KERNING_UNSCALED, &kerning) == 0) { kern.fX = kerning.x; kern.fY = kerning.y; } else kern.fX = kern.fY = 0; } const char* XeTeXFontInst_FT2::getGlyphName(LEGlyphID gid, int& nameLen) { if (!fFreeTypeOnly) return XeTeXFontInst::getGlyphName(gid, nameLen); else if (FT_HAS_GLYPH_NAMES(face)) { static char buffer[256]; FT_Get_Glyph_Name(face, gid, buffer, 256); nameLen = strlen(buffer); return &buffer[0]; } else { nameLen = 0; return NULL; } } LEUnicode32 XeTeXFontInst_FT2::getFirstCharCode() { if (!fFreeTypeOnly) return XeTeXFontInst::getFirstCharCode(); else { FT_UInt gindex; return FT_Get_First_Char(face, &gindex); } } LEUnicode32 XeTeXFontInst_FT2::getLastCharCode() { if (!fFreeTypeOnly) return XeTeXFontInst::getLastCharCode(); else { FT_UInt gindex; LEUnicode32 ch = FT_Get_First_Char(face, &gindex); LEUnicode32 prev = ch; while (gindex != 0) { prev = ch; ch = FT_Get_Next_Char(face, ch, &gindex); } return prev; } }