Index: Source/platform/fonts/mac/SimpleFontDataCoreText.cpp |
diff --git a/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp b/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ec5a5f1805b77f2fb34465e99764be686dbd1dc8 |
--- /dev/null |
+++ b/Source/platform/fonts/mac/SimpleFontDataCoreText.cpp |
@@ -0,0 +1,201 @@ |
+/* |
+ * Copyright (C) 2005, 2006, 2012 Apple Inc. All rights reserved. |
+ * Copyright (C) 2006 Alexey Proskuryakov |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions |
+ * are met: |
+ * 1. Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * 2. 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. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "platform/fonts/SimpleFontData.h" |
+ |
+#include "platform/fonts/Character.h" |
+#include "platform/fonts/Font.h" |
+#include "platform/fonts/GlyphPage.h" |
+#include <ApplicationServices/ApplicationServices.h> |
+ |
+// Forward declare Mac SPIs. |
+// Request for public API: rdar://13787589 |
+extern "C" { |
+void CGFontGetGlyphsForUnichars(CGFontRef, const UniChar chars[], CGGlyph glyphs[], size_t length); |
+} |
+ |
+namespace blink { |
+ |
+CFDictionaryRef SimpleFontData::getCFStringAttributes(TypesettingFeatures typesettingFeatures, FontOrientation orientation) const |
+{ |
+ unsigned key = typesettingFeatures + 1; |
+ HashMap<unsigned, RetainPtr<CFDictionaryRef> >::AddResult addResult = m_CFStringAttributes.add(key, RetainPtr<CFDictionaryRef>()); |
+ RetainPtr<CFDictionaryRef>& attributesDictionary = addResult.storedValue->value; |
+ if (!addResult.isNewEntry) |
+ return attributesDictionary.get(); |
+ |
+ attributesDictionary.adoptCF(CFDictionaryCreateMutable(kCFAllocatorDefault, 4, &kCFCopyStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks)); |
+ CFMutableDictionaryRef mutableAttributes = (CFMutableDictionaryRef)attributesDictionary.get(); |
+ |
+ CFDictionarySetValue(mutableAttributes, kCTFontAttributeName, platformData().ctFont()); |
+ |
+ if (!(typesettingFeatures & Kerning)) { |
+ const float zero = 0; |
+ static CFNumberRef zeroKerningValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberFloatType, &zero); |
+ CFDictionarySetValue(mutableAttributes, kCTKernAttributeName, zeroKerningValue); |
+ } |
+ |
+ bool allowLigatures = (orientation == Horizontal && platformData().allowsLigatures()) || (typesettingFeatures & Ligatures); |
+ if (!allowLigatures) { |
+ const int zero = 0; |
+ static CFNumberRef essentialLigaturesValue = CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &zero); |
+ CFDictionarySetValue(mutableAttributes, kCTLigatureAttributeName, essentialLigaturesValue); |
+ } |
+ |
+ if (orientation == Vertical) |
+ CFDictionarySetValue(mutableAttributes, kCTVerticalFormsAttributeName, kCFBooleanTrue); |
+ |
+ return attributesDictionary.get(); |
+} |
+ |
+static bool shouldUseCoreText(UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData) |
+{ |
+ if (fontData->platformData().isCompositeFontReference()) |
+ return true; |
+ |
+ // CoreText doesn't have vertical glyphs of surrogate pair characters. |
+ // Therefore, we should not use CoreText, but this always returns horizontal glyphs. |
+ // FIXME: We should use vertical glyphs. https://code.google.com/p/chromium/issues/detail?id=340173 |
+ if (bufferLength >= 2 && U_IS_SURROGATE(buffer[0]) && fontData->hasVerticalGlyphs()) { |
+ ASSERT(U_IS_SURROGATE_LEAD(buffer[0])); |
+ ASSERT(U_IS_TRAIL(buffer[1])); |
+ return false; |
+ } |
+ |
+ if (fontData->platformData().widthVariant() != RegularWidth || fontData->hasVerticalGlyphs()) { |
+ // Ideographs don't have a vertical variant or width variants. |
+ for (unsigned i = 0; i < bufferLength; ++i) { |
+ if (!Character::isCJKIdeograph(buffer[i])) |
+ return true; |
+ } |
+ } |
+ |
+ return false; |
+} |
+ |
+bool SimpleFontData::fillGlyphPage(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength) const |
+{ |
+ bool haveGlyphs = false; |
+ |
+ Vector<CGGlyph, 512> glyphs(bufferLength); |
+ if (!shouldUseCoreText(buffer, bufferLength, this)) { |
+ CGFontGetGlyphsForUnichars(platformData().cgFont(), buffer, glyphs.data(), bufferLength); |
+ for (unsigned i = 0; i < length; ++i) { |
+ if (glyphs[i]) { |
+ pageToFill->setGlyphDataForIndex(offset + i, glyphs[i], this); |
+ haveGlyphs = true; |
+ } |
+ } |
+ } else if (!platformData().isCompositeFontReference() && platformData().widthVariant() != RegularWidth |
+ && CTFontGetGlyphsForCharacters(platformData().ctFont(), buffer, glyphs.data(), bufferLength)) { |
+ // When buffer consists of surrogate pairs, CTFontGetGlyphsForCharacters |
+ // places the glyphs at indices corresponding to the first character of each pair. |
+ unsigned glyphStep = bufferLength / length; |
+ for (unsigned i = 0; i < length; ++i) { |
+ if (glyphs[i * glyphStep]) { |
+ pageToFill->setGlyphDataForIndex(offset + i, glyphs[i * glyphStep], this); |
+ haveGlyphs = true; |
+ } |
+ } |
+ } else { |
+ // We ask CoreText for possible vertical variant glyphs |
+ RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buffer, bufferLength, kCFAllocatorNull)); |
+ RetainPtr<CFAttributedStringRef> attributedString(AdoptCF, CFAttributedStringCreate(kCFAllocatorDefault, string.get(), getCFStringAttributes(0, hasVerticalGlyphs() ? Vertical : Horizontal))); |
+ RetainPtr<CTLineRef> line(AdoptCF, CTLineCreateWithAttributedString(attributedString.get())); |
+ |
+ CFArrayRef runArray = CTLineGetGlyphRuns(line.get()); |
+ CFIndex runCount = CFArrayGetCount(runArray); |
+ |
+ Vector<CGGlyph, 512> glyphVector; |
+ Vector<CFIndex, 512> indexVector; |
+ bool done = false; |
+ |
+ // For the CGFont comparison in the loop, use the CGFont that Core Text assigns to the CTFont. This may |
+ // be non-CFEqual to platformData().cgFont(). |
+ RetainPtr<CGFontRef> cgFont(AdoptCF, CTFontCopyGraphicsFont(platformData().ctFont(), 0)); |
+ |
+ for (CFIndex r = 0; r < runCount && !done ; ++r) { |
+ // CTLine could map characters over multiple fonts using its own font fallback list. |
+ // We need to pick runs that use the exact font we need, i.e., platformData().ctFont(). |
+ CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray, r)); |
+ ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID()); |
+ |
+ CFDictionaryRef attributes = CTRunGetAttributes(ctRun); |
+ CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(attributes, kCTFontAttributeName)); |
+ RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(runFont, 0)); |
+ // Use CGFont here as CFEqual for CTFont counts all attributes for font. |
+ bool gotBaseFont = CFEqual(cgFont.get(), runCGFont.get()); |
+ if (gotBaseFont || platformData().isCompositeFontReference()) { |
+ // This run uses the font we want. Extract glyphs. |
+ CFIndex glyphCount = CTRunGetGlyphCount(ctRun); |
+ const CGGlyph* glyphs = CTRunGetGlyphsPtr(ctRun); |
+ if (!glyphs) { |
+ glyphVector.resize(glyphCount); |
+ CTRunGetGlyphs(ctRun, CFRangeMake(0, 0), glyphVector.data()); |
+ glyphs = glyphVector.data(); |
+ } |
+ const CFIndex* stringIndices = CTRunGetStringIndicesPtr(ctRun); |
+ if (!stringIndices) { |
+ indexVector.resize(glyphCount); |
+ CTRunGetStringIndices(ctRun, CFRangeMake(0, 0), indexVector.data()); |
+ stringIndices = indexVector.data(); |
+ } |
+ |
+ if (gotBaseFont) { |
+ for (CFIndex i = 0; i < glyphCount; ++i) { |
+ if (stringIndices[i] >= static_cast<CFIndex>(length)) { |
+ done = true; |
+ break; |
+ } |
+ if (glyphs[i]) { |
+ pageToFill->setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], this); |
+ haveGlyphs = true; |
+ } |
+ } |
+ } else { |
+ const SimpleFontData* runSimple = getCompositeFontReferenceFontData((NSFont *)runFont); |
+ if (runSimple) { |
+ for (CFIndex i = 0; i < glyphCount; ++i) { |
+ if (stringIndices[i] >= static_cast<CFIndex>(length)) { |
+ done = true; |
+ break; |
+ } |
+ if (glyphs[i]) { |
+ pageToFill->setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], runSimple); |
+ haveGlyphs = true; |
+ } |
+ } |
+ } |
+ } |
+ } |
+ } |
+ } |
+ |
+ return haveGlyphs; |
+} |
+ |
+} // namespace blink |