1 /* 2 * Copyright (c) 2006, 2007, 2008, 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 "platform/fonts/FontPlatformData.h" 33 34 #include "SkEndian.h" 35 #include "SkTypeface.h" 36 #include "platform/fonts/FontCache.h" 37 38 namespace blink { 39 40 #if !OS(MACOSX) 41 unsigned FontPlatformData::hash() const 42 { 43 unsigned h = SkTypeface::UniqueID(m_typeface.get()); 44 h ^= 0x01010101 * ((static_cast<int>(m_isHashTableDeletedValue) << 3) | (static_cast<int>(m_orientation) << 2) | (static_cast<int>(m_syntheticBold) << 1) | static_cast<int>(m_syntheticItalic)); 45 46 // This memcpy is to avoid a reinterpret_cast that breaks strict-aliasing 47 // rules. Memcpy is generally optimized enough so that performance doesn't 48 // matter here. 49 uint32_t textSizeBytes; 50 memcpy(&textSizeBytes, &m_textSize, sizeof(uint32_t)); 51 h ^= textSizeBytes; 52 53 return h; 54 } 55 56 bool FontPlatformData::fontContainsCharacter(UChar32 character) 57 { 58 SkPaint paint; 59 setupPaint(&paint); 60 paint.setTextEncoding(SkPaint::kUTF32_TextEncoding); 61 62 uint16_t glyph; 63 paint.textToGlyphs(&character, sizeof(character), &glyph); 64 return glyph; 65 } 66 67 #endif 68 69 #if ENABLE(OPENTYPE_VERTICAL) 70 PassRefPtr<OpenTypeVerticalData> FontPlatformData::verticalData() const 71 { 72 return FontCache::fontCache()->getVerticalData(typeface()->uniqueID(), *this); 73 } 74 75 PassRefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const 76 { 77 RefPtr<SharedBuffer> buffer; 78 79 SkFontTableTag tag = SkEndianSwap32(table); 80 const size_t tableSize = m_typeface->getTableSize(tag); 81 if (tableSize) { 82 Vector<char> tableBuffer(tableSize); 83 m_typeface->getTableData(tag, 0, tableSize, &tableBuffer[0]); 84 buffer = SharedBuffer::adoptVector(tableBuffer); 85 } 86 return buffer.release(); 87 } 88 #endif 89 90 } // namespace blink 91