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| 1 /* | |
| 2 * Copyright (C) 2009 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "config.h" | |
| 32 #include "public/platform/linux/WebFontInfo.h" | |
| 33 | |
| 34 #include "public/platform/linux/WebFontFamily.h" | |
| 35 #include "public/platform/linux/WebFontRenderStyle.h" | |
| 36 #include <fontconfig/fontconfig.h> | |
| 37 #include <string.h> | |
| 38 #include <unicode/utf16.h> | |
| 39 | |
| 40 namespace blink { | |
| 41 | |
| 42 static bool useSubpixelPositioning = false; | |
| 43 | |
| 44 void WebFontInfo::setSubpixelPositioning(bool subpixelPositioning) | |
| 45 { | |
| 46 useSubpixelPositioning = subpixelPositioning; | |
| 47 } | |
| 48 | |
| 49 void WebFontInfo::familyForChar(WebUChar32 c, const char* preferredLocale, WebFo
ntFamily* family) | |
| 50 { | |
| 51 FcCharSet* cset = FcCharSetCreate(); | |
| 52 FcCharSetAddChar(cset, c); | |
| 53 FcPattern* pattern = FcPatternCreate(); | |
| 54 | |
| 55 FcValue fcvalue; | |
| 56 fcvalue.type = FcTypeCharSet; | |
| 57 fcvalue.u.c = cset; | |
| 58 FcPatternAdd(pattern, FC_CHARSET, fcvalue, FcFalse); | |
| 59 | |
| 60 fcvalue.type = FcTypeBool; | |
| 61 fcvalue.u.b = FcTrue; | |
| 62 FcPatternAdd(pattern, FC_SCALABLE, fcvalue, FcFalse); | |
| 63 | |
| 64 if (preferredLocale) { | |
| 65 FcLangSet* langset = FcLangSetCreate(); | |
| 66 FcLangSetAdd(langset, reinterpret_cast<const FcChar8 *>(preferredLocale)
); | |
| 67 FcPatternAddLangSet(pattern, FC_LANG, langset); | |
| 68 FcLangSetDestroy(langset); | |
| 69 } | |
| 70 | |
| 71 FcConfigSubstitute(0, pattern, FcMatchPattern); | |
| 72 FcDefaultSubstitute(pattern); | |
| 73 | |
| 74 FcResult result; | |
| 75 FcFontSet* fontSet = FcFontSort(0, pattern, 0, 0, &result); | |
| 76 FcPatternDestroy(pattern); | |
| 77 FcCharSetDestroy(cset); | |
| 78 | |
| 79 if (!fontSet) { | |
| 80 family->name = WebCString(); | |
| 81 family->isBold = false; | |
| 82 family->isItalic = false; | |
| 83 return; | |
| 84 } | |
| 85 // Older versions of fontconfig have a bug where they cannot select | |
| 86 // only scalable fonts so we have to manually filter the results. | |
| 87 for (int i = 0; i < fontSet->nfont; ++i) { | |
| 88 FcPattern* current = fontSet->fonts[i]; | |
| 89 FcBool isScalable; | |
| 90 | |
| 91 if (FcPatternGetBool(current, FC_SCALABLE, 0, &isScalable) != FcResultMa
tch | |
| 92 || !isScalable) | |
| 93 continue; | |
| 94 | |
| 95 // fontconfig can also return fonts which are unreadable | |
| 96 FcChar8* cFilename; | |
| 97 if (FcPatternGetString(current, FC_FILE, 0, &cFilename) != FcResultMatch
) | |
| 98 continue; | |
| 99 | |
| 100 if (access(reinterpret_cast<char*>(cFilename), R_OK)) | |
| 101 continue; | |
| 102 | |
| 103 FcChar8* familyName; | |
| 104 if (FcPatternGetString(current, FC_FAMILY, 0, &familyName) == FcResultMa
tch) { | |
| 105 const char* charFamily = reinterpret_cast<char*>(familyName); | |
| 106 family->name = WebCString(charFamily, strlen(charFamily)); | |
| 107 } | |
| 108 int weight; | |
| 109 if (FcPatternGetInteger(current, FC_WEIGHT, 0, &weight) == FcResultMatch
) | |
| 110 family->isBold = weight >= FC_WEIGHT_BOLD; | |
| 111 else | |
| 112 family->isBold = false; | |
| 113 int slant; | |
| 114 if (FcPatternGetInteger(current, FC_SLANT, 0, &slant) == FcResultMatch) | |
| 115 family->isItalic = slant != FC_SLANT_ROMAN; | |
| 116 else | |
| 117 family->isItalic = false; | |
| 118 FcFontSetDestroy(fontSet); | |
| 119 return; | |
| 120 } | |
| 121 | |
| 122 FcFontSetDestroy(fontSet); | |
| 123 } | |
| 124 | |
| 125 void WebFontInfo::renderStyleForStrike(const char* family, int sizeAndStyle, Web
FontRenderStyle* out) | |
| 126 { | |
| 127 bool isBold = sizeAndStyle & 1; | |
| 128 bool isItalic = sizeAndStyle & 2; | |
| 129 int pixelSize = sizeAndStyle >> 2; | |
| 130 | |
| 131 FcPattern* pattern = FcPatternCreate(); | |
| 132 FcValue fcvalue; | |
| 133 | |
| 134 fcvalue.type = FcTypeString; | |
| 135 fcvalue.u.s = reinterpret_cast<const FcChar8 *>(family); | |
| 136 FcPatternAdd(pattern, FC_FAMILY, fcvalue, FcFalse); | |
| 137 | |
| 138 fcvalue.type = FcTypeInteger; | |
| 139 fcvalue.u.i = isBold ? FC_WEIGHT_BOLD : FC_WEIGHT_NORMAL; | |
| 140 FcPatternAdd(pattern, FC_WEIGHT, fcvalue, FcFalse); | |
| 141 | |
| 142 fcvalue.type = FcTypeInteger; | |
| 143 fcvalue.u.i = isItalic ? FC_SLANT_ITALIC : FC_SLANT_ROMAN; | |
| 144 FcPatternAdd(pattern, FC_SLANT, fcvalue, FcFalse); | |
| 145 | |
| 146 fcvalue.type = FcTypeBool; | |
| 147 fcvalue.u.b = FcTrue; | |
| 148 FcPatternAdd(pattern, FC_SCALABLE, fcvalue, FcFalse); | |
| 149 | |
| 150 fcvalue.type = FcTypeDouble; | |
| 151 fcvalue.u.d = pixelSize; | |
| 152 FcPatternAdd(pattern, FC_SIZE, fcvalue, FcFalse); | |
| 153 | |
| 154 FcConfigSubstitute(0, pattern, FcMatchPattern); | |
| 155 FcDefaultSubstitute(pattern); | |
| 156 | |
| 157 FcResult result; | |
| 158 // Some versions of fontconfig don't actually write a value into result. | |
| 159 // However, it's not clear from the documentation if result should be a | |
| 160 // non-0 pointer: future versions might expect to be able to write to | |
| 161 // it. So we pass in a valid pointer and ignore it. | |
| 162 FcPattern* match = FcFontMatch(0, pattern, &result); | |
| 163 FcPatternDestroy(pattern); | |
| 164 | |
| 165 out->setDefaults(); | |
| 166 | |
| 167 if (!match) | |
| 168 return; | |
| 169 | |
| 170 FcBool b; | |
| 171 int i; | |
| 172 | |
| 173 if (FcPatternGetBool(match, FC_ANTIALIAS, 0, &b) == FcResultMatch) | |
| 174 out->useAntiAlias = b; | |
| 175 if (FcPatternGetBool(match, FC_EMBEDDED_BITMAP, 0, &b) == FcResultMatch) | |
| 176 out->useBitmaps = b; | |
| 177 if (FcPatternGetBool(match, FC_AUTOHINT, 0, &b) == FcResultMatch) | |
| 178 out->useAutoHint = b; | |
| 179 if (FcPatternGetBool(match, FC_HINTING, 0, &b) == FcResultMatch) | |
| 180 out->useHinting = b; | |
| 181 if (FcPatternGetInteger(match, FC_HINT_STYLE, 0, &i) == FcResultMatch) | |
| 182 out->hintStyle = i; | |
| 183 if (FcPatternGetInteger(match, FC_RGBA, 0, &i) == FcResultMatch) { | |
| 184 switch (i) { | |
| 185 case FC_RGBA_NONE: | |
| 186 out->useSubpixelRendering = 0; | |
| 187 break; | |
| 188 case FC_RGBA_RGB: | |
| 189 case FC_RGBA_BGR: | |
| 190 case FC_RGBA_VRGB: | |
| 191 case FC_RGBA_VBGR: | |
| 192 out->useSubpixelRendering = 1; | |
| 193 break; | |
| 194 default: | |
| 195 // This includes FC_RGBA_UNKNOWN. | |
| 196 out->useSubpixelRendering = 2; | |
| 197 break; | |
| 198 } | |
| 199 } | |
| 200 | |
| 201 // FontConfig doesn't provide parameters to configure whether subpixel | |
| 202 // positioning should be used or not, so we just use a global setting. | |
| 203 out->useSubpixelPositioning = useSubpixelPositioning; | |
| 204 | |
| 205 FcPatternDestroy(match); | |
| 206 } | |
| 207 | |
| 208 } // namespace blink | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk