| /* |
| * 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 "public/platform/linux/WebFontFamily.h" |
| #include <fontconfig/fontconfig.h> |
| #include <string.h> |
| #include <unicode/utf16.h> |
| |
| namespace WebKit { |
| |
| static bool useSubpixelPositioning = false; |
| |
| void WebFontInfo::setSubpixelPositioning(bool subpixelPositioning) |
| { |
| useSubpixelPositioning = subpixelPositioning; |
| } |
| |
| void WebFontInfo::familyForChar(WebUChar32 c, const char* preferredLocale, WebFontFamily* family) |
| { |
| FcCharSet* cset = FcCharSetCreate(); |
| FcCharSetAddChar(cset, c); |
| 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); |
| |
| if (preferredLocale) { |
| FcLangSet* langset = FcLangSetCreate(); |
| FcLangSetAdd(langset, reinterpret_cast<const FcChar8 *>(preferredLocale)); |
| FcPatternAddLangSet(pattern, FC_LANG, langset); |
| FcLangSetDestroy(langset); |
| } |
| |
| FcConfigSubstitute(0, pattern, FcMatchPattern); |
| FcDefaultSubstitute(pattern); |
| |
| FcResult result; |
| FcFontSet* fontSet = FcFontSort(0, pattern, 0, 0, &result); |
| FcPatternDestroy(pattern); |
| FcCharSetDestroy(cset); |
| |
| if (!fontSet) { |
| family->name = WebCString(); |
| family->isBold = false; |
| family->isItalic = false; |
| return; |
| } |
| // 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<char*>(cFilename), R_OK)) |
| continue; |
| |
| FcChar8* familyName; |
| if (FcPatternGetString(current, FC_FAMILY, 0, &familyName) == FcResultMatch) { |
| const char* charFamily = reinterpret_cast<char*>(familyName); |
| family->name = WebCString(charFamily, strlen(charFamily)); |
| } |
| int weight; |
| if (FcPatternGetInteger(current, FC_WEIGHT, 0, &weight) == FcResultMatch) |
| family->isBold = weight >= FC_WEIGHT_BOLD; |
| else |
| family->isBold = false; |
| int slant; |
| if (FcPatternGetInteger(current, FC_SLANT, 0, &slant) == FcResultMatch) |
| family->isItalic = slant != FC_SLANT_ROMAN; |
| else |
| family->isItalic = false; |
| FcFontSetDestroy(fontSet); |
| return; |
| } |
| |
| FcFontSetDestroy(fontSet); |
| } |
| |
| 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<const FcChar8 *>(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) |
| 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->useSubpixelRendering = 0; |
| break; |
| case FC_RGBA_RGB: |
| case FC_RGBA_BGR: |
| case FC_RGBA_VRGB: |
| case FC_RGBA_VBGR: |
| out->useSubpixelRendering = 1; |
| break; |
| default: |
| // This includes FC_RGBA_UNKNOWN. |
| out->useSubpixelRendering = 2; |
| break; |
| } |
| } |
| |
| // FontConfig doesn't provide parameters to configure whether subpixel |
| // positioning should be used or not, so we just use a global setting. |
| out->useSubpixelPositioning = useSubpixelPositioning; |
| |
| FcPatternDestroy(match); |
| } |
| |
| } // namespace WebKit |