1 /* 2 * Copyright (C) 2008 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "CSSSegmentedFontFace.h" 28 29 #include "CSSFontFace.h" 30 #include "CSSFontSelector.h" 31 #include "FontDescription.h" 32 #include "SegmentedFontData.h" 33 #include "SimpleFontData.h" 34 35 namespace WebCore { 36 37 CSSSegmentedFontFace::CSSSegmentedFontFace(CSSFontSelector* fontSelector) 38 : m_fontSelector(fontSelector) 39 { 40 } 41 42 CSSSegmentedFontFace::~CSSSegmentedFontFace() 43 { 44 pruneTable(); 45 unsigned size = m_fontFaces.size(); 46 for (unsigned i = 0; i < size; i++) 47 m_fontFaces[i]->removedFromSegmentedFontFace(this); 48 } 49 50 void CSSSegmentedFontFace::pruneTable() 51 { 52 // Make sure the glyph page tree prunes out all uses of this custom font. 53 if (m_fontDataTable.isEmpty()) 54 return; 55 56 HashMap<unsigned, SegmentedFontData*>::iterator end = m_fontDataTable.end(); 57 for (HashMap<unsigned, SegmentedFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it) 58 m_fontSelector->retireCustomFont(it->second); 59 60 m_fontDataTable.clear(); 61 } 62 63 bool CSSSegmentedFontFace::isValid() const 64 { 65 // Valid if at least one font face is valid. 66 unsigned size = m_fontFaces.size(); 67 for (unsigned i = 0; i < size; i++) { 68 if (m_fontFaces[i]->isValid()) 69 return true; 70 } 71 return false; 72 } 73 74 void CSSSegmentedFontFace::fontLoaded(CSSFontFace*) 75 { 76 pruneTable(); 77 } 78 79 void CSSSegmentedFontFace::appendFontFace(PassRefPtr<CSSFontFace> fontFace) 80 { 81 pruneTable(); 82 fontFace->addedToSegmentedFontFace(this); 83 m_fontFaces.append(fontFace); 84 } 85 86 FontData* CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription) 87 { 88 if (!isValid()) 89 return 0; 90 91 FontTraitsMask desiredTraitsMask = fontDescription.traitsMask(); 92 unsigned hashKey = ((fontDescription.computedPixelSize() + 1) << (FontTraitsMaskWidth + 1)) | ((fontDescription.orientation() == Vertical ? 1 : 0) << FontTraitsMaskWidth) | desiredTraitsMask; 93 94 SegmentedFontData* fontData = m_fontDataTable.get(hashKey); 95 if (fontData) 96 return fontData; 97 98 fontData = new SegmentedFontData(); 99 100 unsigned size = m_fontFaces.size(); 101 for (unsigned i = 0; i < size; i++) { 102 if (!m_fontFaces[i]->isValid()) 103 continue; 104 FontTraitsMask traitsMask = m_fontFaces[i]->traitsMask(); 105 bool syntheticBold = !(traitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)) && (desiredTraitsMask & (FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask)); 106 bool syntheticItalic = !(traitsMask & FontStyleItalicMask) && (desiredTraitsMask & FontStyleItalicMask); 107 if (const SimpleFontData* faceFontData = m_fontFaces[i]->getFontData(fontDescription, syntheticBold, syntheticItalic)) { 108 ASSERT(!faceFontData->isSegmented()); 109 const Vector<CSSFontFace::UnicodeRange>& ranges = m_fontFaces[i]->ranges(); 110 unsigned numRanges = ranges.size(); 111 if (!numRanges) 112 fontData->appendRange(FontDataRange(0, 0x7FFFFFFF, faceFontData)); 113 else { 114 for (unsigned j = 0; j < numRanges; ++j) 115 fontData->appendRange(FontDataRange(ranges[j].from(), ranges[j].to(), faceFontData)); 116 } 117 } 118 } 119 if (fontData->numRanges()) 120 m_fontDataTable.set(hashKey, fontData); 121 else { 122 delete fontData; 123 fontData = 0; 124 } 125 126 return fontData; 127 } 128 129 } 130