--- /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 <fontconfig/fontconfig.h>
+#include <string.h>
+#include <unicode/utf16.h>
+
+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<char*>(cFilename), R_OK))
+ continue;
+
+ FcChar8* family;
+ WebCString result;
+ if (FcPatternGetString(current, FC_FAMILY, 0, &family) == FcResultMatch) {
+ const char* charFamily = reinterpret_cast<char*>(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<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) {
+ 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