15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (c) 2007, 2008, 2010 Google Inc. All rights reserved. 302772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions are 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * met: 702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Redistributions of source code must retain the above copyright 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Redistributions in binary form must reproduce the above 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * copyright notice, this list of conditions and the following disclaimer 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in the documentation and/or other materials provided with the 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * distribution. 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * * Neither the name of Google Inc. nor the names of its 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * contributors may be used to endorse or promote products derived from 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * this software without specific prior written permission. 1702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "config.h" 32a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)#include "platform/fonts/Font.h" 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 341e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/NotImplemented.h" 3509380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)#include "platform/fonts/FontPlatformFeatures.h" 36a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)#include "platform/fonts/SimpleFontData.h" 37a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)#include "platform/fonts/harfbuzz/HarfBuzzShaper.h" 3819cde67944066db31e633d9e386f2aa9bf9fadb3Torne (Richard Coles)#include "platform/fonts/GlyphBuffer.h" 391e202183a5dc46166763171984b285173f8585e5Torne (Richard Coles)#include "platform/geometry/FloatRect.h" 40a854de003a23bf3c7f95ec0f8154ada64092ff5cTorne (Richard Coles)#include "platform/graphics/GraphicsContext.h" 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "SkPaint.h" 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "SkTemplates.h" 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 457757ec2eadfa2dd8ac2aeed0a4399e9b07ec38cbBen Murdoch#include "wtf/unicode/Unicode.h" 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WebCore { 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4909380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)bool FontPlatformFeatures::canReturnFallbackFontsForComplexText() 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return false; 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 5409380295ba73501a205346becac22c6978e4671dTorne (Richard Coles)bool FontPlatformFeatures::canExpandAroundIdeographsInComplexText() 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return false; 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 5951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)static void paintGlyphs(GraphicsContext* gc, const SimpleFontData* font, 605d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) const Glyph* glyphs, unsigned numGlyphs, 6151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkPoint* pos, const FloatRect& textRect) 6251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 63e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) TextDrawingModeFlags textMode = gc->textDrawingMode(); 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // We draw text up to two times (once for fill, once for stroke). 665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (textMode & TextModeFill) { 675d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) SkPaint paint = gc->fillPaint(); 6819cde67944066db31e633d9e386f2aa9bf9fadb3Torne (Richard Coles) font->platformData().setupPaint(&paint, gc); 6981a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) gc->adjustTextRenderMode(&paint); 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 725d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) gc->drawPosText(glyphs, numGlyphs * sizeof(Glyph), pos, textRect, paint); 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if ((textMode & TextModeStroke) 76e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) && gc->strokeStyle() != NoStroke 77e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) && gc->strokeThickness() > 0) { 785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 795d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) SkPaint paint = gc->strokePaint(); 8019cde67944066db31e633d9e386f2aa9bf9fadb3Torne (Richard Coles) font->platformData().setupPaint(&paint, gc); 8181a5157921f1d2a7ff6aae115bfe3c139b38a5c8Torne (Richard Coles) gc->adjustTextRenderMode(&paint); 825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); 835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (textMode & TextModeFill) { 8507a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // If there is a shadow and we filled above, there will already be 8607a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // a shadow. We don't want to draw it again or it will be too dark 8707a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // and it will go on top of the fill. 8807a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // 8907a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // Note that this isn't strictly correct, since the stroke could be 9007a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // very thick and the shadow wouldn't account for this. The "right" 9107a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // thing would be to draw to a new layer and then draw that layer 9207a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // with a shadow. But this is a lot of extra work for something 9307a852d8c1953036774d8f3b65d18dcfea3bb4a2Ben Murdoch // that isn't normally an issue. 945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) paint.setLooper(0); 955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 975d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) gc->drawPosText(glyphs, numGlyphs * sizeof(Glyph), pos, textRect, paint); 9851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 9951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)} 10051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 10151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles)void Font::drawGlyphs(GraphicsContext* gc, const SimpleFontData* font, 10251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) const GlyphBuffer& glyphBuffer, unsigned from, unsigned numGlyphs, 10351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) const FloatPoint& point, const FloatRect& textRect) const 10451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles){ 10551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkScalar x = SkFloatToScalar(point.x()); 10651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkScalar y = SkFloatToScalar(point.y()); 10751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 10851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkAutoSTMalloc<32, SkPoint> storage(numGlyphs); 10951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkPoint* pos = storage.get(); 11051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 11151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) const OpenTypeVerticalData* verticalData = font->verticalData(); 11251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) if (font->platformData().orientation() == Vertical && verticalData) { 11351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) AffineTransform savedMatrix = gc->getCTM(); 11451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) gc->concatCTM(AffineTransform(0, -1, 1, 0, point.x(), point.y())); 11551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) gc->concatCTM(AffineTransform(1, 0, 0, 1, -point.x(), -point.y())); 11651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 11751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) const unsigned kMaxBufferLength = 256; 11851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) Vector<FloatPoint, kMaxBufferLength> translations; 11951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 12051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) const FontMetrics& metrics = font->fontMetrics(); 12151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) SkScalar verticalOriginX = SkFloatToScalar(point.x() + metrics.floatAscent() - metrics.floatAscent(IdeographicBaseline)); 12251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) float horizontalOffset = point.x(); 12351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 12451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) unsigned glyphIndex = 0; 12551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) while (glyphIndex < numGlyphs) { 12651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) unsigned chunkLength = std::min(kMaxBufferLength, numGlyphs - glyphIndex); 12751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 1285d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) const Glyph* glyphs = glyphBuffer.glyphs(from + glyphIndex); 12951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) translations.resize(chunkLength); 13051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) verticalData->getVerticalTranslationsForGlyphs(font, &glyphs[0], chunkLength, reinterpret_cast<float*>(&translations[0])); 13151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 13251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) x = verticalOriginX; 13351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) y = SkFloatToScalar(point.y() + horizontalOffset - point.x()); 13451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 13551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) float currentWidth = 0; 13651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) for (unsigned i = 0; i < chunkLength; ++i, ++glyphIndex) { 13751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) pos[i].set( 13851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) x + SkIntToScalar(lroundf(translations[i].x())), 13951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) y + -SkIntToScalar(-lroundf(currentWidth - translations[i].y()))); 140d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) currentWidth += glyphBuffer.advanceAt(from + glyphIndex).width(); 1415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 14251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) horizontalOffset += currentWidth; 14351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) paintGlyphs(gc, font, glyphs, chunkLength, pos, textRect); 14451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 14551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 14651b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) gc->setCTM(savedMatrix); 14751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) return; 1485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 14951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 15051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // FIXME: text rendering speed: 15151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // Android has code in their WebCore fork to special case when the 15251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // GlyphBuffer has no advances other than the defaults. In that case the 15351b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // text drawing can proceed faster. However, it's unclear when those 15451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // patches may be upstreamed to WebKit so we always use the slower path 15551b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) // here. 1565d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) const FloatSize* adv = glyphBuffer.advances(from); 15751b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) for (unsigned i = 0; i < numGlyphs; i++) { 15851b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) pos[i].set(x, y); 15951b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) x += SkFloatToScalar(adv[i].width()); 16051b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) y += SkFloatToScalar(adv[i].height()); 16151b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) } 16251b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) 1635d92fedcae5e801a8b224de090094f2d9df0b54aTorne (Richard Coles) const Glyph* glyphs = glyphBuffer.glyphs(from); 16451b2906e11752df6c18351cf520e30522d3b53a1Torne (Richard Coles) paintGlyphs(gc, font, glyphs, numGlyphs, pos, textRect); 1655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 16793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles)void Font::drawComplexText(GraphicsContext* gc, const TextRunPaintInfo& runInfo, const FloatPoint& point) const 1685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 16993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) if (!runInfo.run.length()) 1705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 1715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 172e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) TextDrawingModeFlags textMode = gc->textDrawingMode(); 1735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool fill = textMode & TextModeFill; 1745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool stroke = (textMode & TextModeStroke) 175e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) && gc->strokeStyle() != NoStroke 176e52495584422c5edb5b2944981473a2e208da323Torne (Richard Coles) && gc->strokeThickness() > 0; 1775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!fill && !stroke) 1795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 1805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) GlyphBuffer glyphBuffer; 18293ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) HarfBuzzShaper shaper(this, runInfo.run); 18393ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) shaper.setDrawRange(runInfo.from, runInfo.to); 184a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch if (!shaper.shape(&glyphBuffer) || glyphBuffer.isEmpty()) 1855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 1865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) FloatPoint adjustedPoint = shaper.adjustStartPoint(point); 18793ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) drawGlyphBuffer(gc, runInfo, glyphBuffer, adjustedPoint); 1885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 190d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)void Font::drawEmphasisMarksForComplexText(GraphicsContext* context, const TextRunPaintInfo& runInfo, const AtomicString& mark, const FloatPoint& point) const 1915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 192d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) GlyphBuffer glyphBuffer; 193d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 194a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch float initialAdvance = getGlyphsAndAdvancesForComplexText(runInfo, glyphBuffer, ForTextEmphasis); 195d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 196d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) if (glyphBuffer.isEmpty()) 197d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return; 198d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 199d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) drawEmphasisMarks(context, runInfo, glyphBuffer, mark, FloatPoint(point.x() + initialAdvance, point.y())); 200d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles)} 201d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) 202a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdochfloat Font::getGlyphsAndAdvancesForComplexText(const TextRunPaintInfo& runInfo, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot forTextEmphasis) const 203d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles){ 204a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch HarfBuzzShaper shaper(this, runInfo.run, HarfBuzzShaper::ForTextEmphasis); 205a9984bf9ddc3cf73fdae3f29134a2bab379e7029Ben Murdoch shaper.setDrawRange(runInfo.from, runInfo.to); 206d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) shaper.shape(&glyphBuffer); 207d5428f32f5d1719f774f62e19147104ca245a3abTorne (Richard Coles) return 0; 2085c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 210d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles)float Font::floatWidthForComplexText(const TextRun& run, HashSet<const SimpleFontData*>* /* fallbackFonts */, IntRectExtent* glyphBounds) const 2115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HarfBuzzShaper shaper(this, run); 2135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!shaper.shape()) 2145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 21543e7502580f146aa5b3db8267ba6dbb5c733a489Torne (Richard Coles) 216d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) glyphBounds->setTop(floorf(-shaper.glyphBoundingBox().top())); 217d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) glyphBounds->setBottom(ceilf(shaper.glyphBoundingBox().bottom())); 218d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) glyphBounds->setLeft(std::max<int>(0, floorf(-shaper.glyphBoundingBox().left()))); 219d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) glyphBounds->setRight(std::max<int>(0, ceilf(shaper.glyphBoundingBox().right() - shaper.totalWidth()))); 220d6cdb82654e8f3343a693ca752d5c4cee0324e17Torne (Richard Coles) 2215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return shaper.totalWidth(); 2225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// Return the code point index for the given |x| offset into the text run. 2255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)int Font::offsetForPositionForComplexText(const TextRun& run, float xFloat, 2265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool includePartialGlyphs) const 2275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HarfBuzzShaper shaper(this, run); 2295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!shaper.shape()) 2305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 231926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) return shaper.offsetForPosition(xFloat); 2325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// Return the rectangle for selecting the given range of code-points in the TextRun. 2355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)FloatRect Font::selectionRectForComplexText(const TextRun& run, 2365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) const FloatPoint& point, int height, 2375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) int from, int to) const 2385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HarfBuzzShaper shaper(this, run); 2405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!shaper.shape()) 2415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return FloatRect(); 2425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return shaper.selectionRect(point, height, from, to); 2435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WebCore 246