1 /* 2 * Copyright (c) 2008, 2009 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 "GlyphPageTreeNode.h" 33 34 #include "Font.h" 35 #include "SimpleFontData.h" 36 37 #include "SkTemplates.h" 38 #include "SkPaint.h" 39 #include "SkUtils.h" 40 41 namespace WebCore { 42 43 bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData) 44 { 45 if (SkUTF16_IsHighSurrogate(buffer[bufferLength-1])) { 46 SkDebugf("%s last char is high-surrogate", __FUNCTION__); 47 return false; 48 } 49 50 SkPaint paint; 51 fontData->platformData().setupPaint(&paint); 52 paint.setTextEncoding(SkPaint::kUTF16_TextEncoding); 53 54 SkAutoSTMalloc <GlyphPage::size, uint16_t> glyphStorage(length); 55 uint16_t* glyphs = glyphStorage.get(); 56 // textToGlyphs takes a byte count, not a glyph count so we multiply by two. 57 unsigned count = paint.textToGlyphs(buffer, bufferLength * 2, glyphs); 58 if (count != length) { 59 SkDebugf("%s count != length\n", __FUNCTION__); 60 return false; 61 } 62 63 unsigned allGlyphs = 0; // track if any of the glyphIDs are non-zero 64 for (unsigned i = 0; i < length; i++) { 65 setGlyphDataForIndex(offset + i, glyphs[i], glyphs[i] ? fontData : NULL); 66 allGlyphs |= glyphs[i]; 67 } 68 69 return allGlyphs != 0; 70 } 71 72 } // namespace WebCore 73
