diff -r 000000000000 -r 4f2f89ce4247 WebKit/chromium/src/gtk/WebFontInfo.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/WebKit/chromium/src/gtk/WebFontInfo.cpp Fri Sep 17 09:02:29 2010 +0300 @@ -0,0 +1,189 @@ +/* + * Copyright (C) 2009 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "WebFontInfo.h" +#include "WebFontRenderStyle.h" + +#include +#include +#include + +namespace WebKit { + +WebCString WebFontInfo::familyForChars(const WebUChar* characters, size_t numCharacters) +{ + FcCharSet* cset = FcCharSetCreate(); + for (size_t i = 0; i < numCharacters; ++i) { + if (U16_IS_SURROGATE(characters[i]) + && U16_IS_SURROGATE_LEAD(characters[i]) + && i != numCharacters - 1 + && U16_IS_TRAIL(characters[i + 1])) { + FcCharSetAddChar(cset, U16_GET_SUPPLEMENTARY(characters[i], characters[i+1])); + i++; + } else + FcCharSetAddChar(cset, characters[i]); + } + FcPattern* pattern = FcPatternCreate(); + + FcValue fcvalue; + fcvalue.type = FcTypeCharSet; + fcvalue.u.c = cset; + FcPatternAdd(pattern, FC_CHARSET, fcvalue, FcFalse); + + fcvalue.type = FcTypeBool; + fcvalue.u.b = FcTrue; + FcPatternAdd(pattern, FC_SCALABLE, fcvalue, FcFalse); + + FcConfigSubstitute(0, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + FcResult result; + FcFontSet* fontSet = FcFontSort(0, pattern, 0, 0, &result); + FcPatternDestroy(pattern); + FcCharSetDestroy(cset); + + if (!fontSet) + return WebCString(); + + // Older versions of fontconfig have a bug where they cannot select + // only scalable fonts so we have to manually filter the results. + for (int i = 0; i < fontSet->nfont; ++i) { + FcPattern* current = fontSet->fonts[i]; + FcBool isScalable; + + if (FcPatternGetBool(current, FC_SCALABLE, 0, &isScalable) != FcResultMatch + || !isScalable) + continue; + + // fontconfig can also return fonts which are unreadable + FcChar8* cFilename; + if (FcPatternGetString(current, FC_FILE, 0, &cFilename) != FcResultMatch) + continue; + + if (access(reinterpret_cast(cFilename), R_OK)) + continue; + + FcChar8* family; + WebCString result; + if (FcPatternGetString(current, FC_FAMILY, 0, &family) == FcResultMatch) { + const char* charFamily = reinterpret_cast(family); + result = WebCString(charFamily, strlen(charFamily)); + } + FcFontSetDestroy(fontSet); + return result; + } + + FcFontSetDestroy(fontSet); + return WebCString(); +} + +void WebFontInfo::renderStyleForStrike(const char* family, int sizeAndStyle, WebFontRenderStyle* out) +{ + bool isBold = sizeAndStyle & 1; + bool isItalic = sizeAndStyle & 2; + int pixelSize = sizeAndStyle >> 2; + + FcPattern* pattern = FcPatternCreate(); + FcValue fcvalue; + + fcvalue.type = FcTypeString; + fcvalue.u.s = reinterpret_cast(family); + FcPatternAdd(pattern, FC_FAMILY, fcvalue, FcFalse); + + fcvalue.type = FcTypeInteger; + fcvalue.u.i = isBold ? FC_WEIGHT_BOLD : FC_WEIGHT_NORMAL; + FcPatternAdd(pattern, FC_WEIGHT, fcvalue, FcFalse); + + fcvalue.type = FcTypeInteger; + fcvalue.u.i = isItalic ? FC_SLANT_ITALIC : FC_SLANT_ROMAN; + FcPatternAdd(pattern, FC_SLANT, fcvalue, FcFalse); + + fcvalue.type = FcTypeBool; + fcvalue.u.b = FcTrue; + FcPatternAdd(pattern, FC_SCALABLE, fcvalue, FcFalse); + + fcvalue.type = FcTypeDouble; + fcvalue.u.d = pixelSize; + FcPatternAdd(pattern, FC_SIZE, fcvalue, FcFalse); + + FcConfigSubstitute(0, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + FcResult result; + // Some versions of fontconfig don't actually write a value into result. + // However, it's not clear from the documentation if result should be a + // non-0 pointer: future versions might expect to be able to write to + // it. So we pass in a valid pointer and ignore it. + FcPattern* match = FcFontMatch(0, pattern, &result); + FcPatternDestroy(pattern); + + out->setDefaults(); + + if (!match) { + FcPatternDestroy(match); + return; + } + + FcBool b; + int i; + + if (FcPatternGetBool(match, FC_ANTIALIAS, 0, &b) == FcResultMatch) + out->useAntiAlias = b; + if (FcPatternGetBool(match, FC_EMBEDDED_BITMAP, 0, &b) == FcResultMatch) + out->useBitmaps = b; + if (FcPatternGetBool(match, FC_AUTOHINT, 0, &b) == FcResultMatch) + out->useAutoHint = b; + if (FcPatternGetBool(match, FC_HINTING, 0, &b) == FcResultMatch) + out->useHinting = b; + if (FcPatternGetInteger(match, FC_HINT_STYLE, 0, &i) == FcResultMatch) + out->hintStyle = i; + if (FcPatternGetInteger(match, FC_RGBA, 0, &i) == FcResultMatch) { + switch (i) { + case FC_RGBA_NONE: + out->useSubpixel = 0; + break; + case FC_RGBA_RGB: + case FC_RGBA_BGR: + case FC_RGBA_VRGB: + case FC_RGBA_VBGR: + out->useSubpixel = 1; + break; + default: + // This includes FC_RGBA_UNKNOWN. + out->useSubpixel = 2; + break; + } + } + + FcPatternDestroy(match); +} + +} // namespace WebKit