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/*
* Copyright (c) 2006, 2007, 2008, 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 "FontCache.h"
#include "Font.h"
#include "FontDescription.h"
#include "FontFamily.h"
#include "FontPlatformData.h"
#include "Logging.h"
#include "NotImplemented.h"
#include "PlatformSupport.h"
#include "SimpleFontData.h"
#include "SkPaint.h"
#include "SkTypeface.h"
#include "SkUtils.h"
#include <unicode/locid.h>
#include <wtf/Assertions.h>
#include <wtf/text/AtomicString.h>
#include <wtf/text/CString.h>
namespace WebCore {
void FontCache::platformInit()
{
}
const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font,
const UChar* characters,
int length)
{
icu::Locale locale = icu::Locale::getDefault();
FontCache::SimpleFontFamily family;
FontCache::getFontFamilyForCharacters(characters, length, locale.getLanguage(), &family);
if (family.name.isEmpty())
return 0;
AtomicString atomicFamily(family.name);
// Changes weight and/or italic of given FontDescription depends on
// the result of fontconfig so that keeping the correct font mapping
// of the given characters. See http://crbug.com/32109 for details.
bool shouldSetFakeBold = false;
bool shouldSetFakeItalic = false;
FontDescription description(font.fontDescription());
if (family.isBold && description.weight() < FontWeightBold)
description.setWeight(FontWeightBold);
if (!family.isBold && description.weight() >= FontWeightBold) {
shouldSetFakeBold = true;
description.setWeight(FontWeightNormal);
}
if (family.isItalic && description.italic() == FontItalicOff)
description.setItalic(FontItalicOn);
if (!family.isItalic && description.italic() == FontItalicOn) {
shouldSetFakeItalic = true;
description.setItalic(FontItalicOff);
}
FontPlatformData* substitutePlatformData = getCachedFontPlatformData(description, atomicFamily, DoNotRetain);
if (!substitutePlatformData)
return 0;
FontPlatformData platformData = FontPlatformData(*substitutePlatformData);
platformData.setFakeBold(shouldSetFakeBold);
platformData.setFakeItalic(shouldSetFakeItalic);
return getCachedFontData(&platformData, DoNotRetain);
}
SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
{
return 0;
}
SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& description, ShouldRetain shouldRetain)
{
DEFINE_STATIC_LOCAL(const AtomicString, sansStr, ("Sans"));
DEFINE_STATIC_LOCAL(const AtomicString, serifStr, ("Serif"));
DEFINE_STATIC_LOCAL(const AtomicString, monospaceStr, ("Monospace"));
FontPlatformData* fontPlatformData = 0;
switch (description.genericFamily()) {
case FontDescription::SerifFamily:
fontPlatformData = getCachedFontPlatformData(description, serifStr);
break;
case FontDescription::MonospaceFamily:
fontPlatformData = getCachedFontPlatformData(description, monospaceStr);
break;
case FontDescription::SansSerifFamily:
default:
fontPlatformData = getCachedFontPlatformData(description, sansStr);
break;
}
if (!fontPlatformData) {
// we should at least have Arial; this is the SkFontHost_fontconfig last resort fallback
DEFINE_STATIC_LOCAL(const AtomicString, arialStr, ("Arial"));
fontPlatformData = getCachedFontPlatformData(description, arialStr);
}
ASSERT(fontPlatformData);
return getCachedFontData(fontPlatformData, shouldRetain);
}
void FontCache::getTraitsInFamily(const AtomicString& familyName,
Vector<unsigned>& traitsMasks)
{
notImplemented();
}
FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription,
const AtomicString& family)
{
const char* name = 0;
CString s;
// If we're creating a fallback font (e.g. "-webkit-monospace"), convert the name into
// the fallback name (like "monospace") that fontconfig understands.
if (!family.length() || family.startsWith("-webkit-")) {
static const struct {
FontDescription::GenericFamilyType mType;
const char* mName;
} fontDescriptions[] = {
{ FontDescription::SerifFamily, "serif" },
{ FontDescription::SansSerifFamily, "sans-serif" },
{ FontDescription::MonospaceFamily, "monospace" },
{ FontDescription::CursiveFamily, "cursive" },
{ FontDescription::FantasyFamily, "fantasy" }
};
FontDescription::GenericFamilyType type = fontDescription.genericFamily();
for (unsigned i = 0; i < SK_ARRAY_COUNT(fontDescriptions); i++) {
if (type == fontDescriptions[i].mType) {
name = fontDescriptions[i].mName;
break;
}
}
if (!name)
name = "";
} else {
// convert the name to utf8
s = family.string().utf8();
name = s.data();
}
int style = SkTypeface::kNormal;
if (fontDescription.weight() >= FontWeightBold)
style |= SkTypeface::kBold;
if (fontDescription.italic())
style |= SkTypeface::kItalic;
SkTypeface* tf = SkTypeface::CreateFromName(name, static_cast<SkTypeface::Style>(style));
if (!tf)
return 0;
FontPlatformData* result =
new FontPlatformData(tf,
name,
fontDescription.computedSize(),
(style & SkTypeface::kBold) && !tf->isBold(),
(style & SkTypeface::kItalic) && !tf->isItalic(),
fontDescription.orientation(),
fontDescription.textOrientation());
tf->unref();
return result;
}
} // namespace WebCore
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