165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch/* 265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * Copyright (C) 2011 Apple Inc. All rights reserved. 365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * 465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * Redistribution and use in source and binary forms, with or without 565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * modification, are permitted provided that the following conditions 665f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * are met: 765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * 1. Redistributions of source code must retain the above copyright 865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * notice, this list of conditions and the following disclaimer. 965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * 2. Redistributions in binary form must reproduce the above copyright 1065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * notice, this list of conditions and the following disclaimer in the 1165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * documentation and/or other materials provided with the distribution. 1265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * 1365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 1465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 1565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 1665f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 1765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 1865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 1965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 2365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch * THE POSSIBILITY OF SUCH DAMAGE. 2465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch */ 2565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 262fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "config.h" 272fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "BackingStore.h" 2865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 292fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "CGUtilities.h" 302fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "ShareableBitmap.h" 312fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "UpdateInfo.h" 322fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import "WebPageProxy.h" 332fc2651226baac27029e38c9d6ef883fa32084dbSteve Block#import <WebCore/GraphicsContext.h> 3465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 3565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdochusing namespace WebCore; 3665f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 3765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdochnamespace WebKit { 3865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 3965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdochvoid BackingStore::paint(PlatformGraphicsContext context, const IntRect& rect) 4065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch{ 41ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_cgLayer) { 42ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextSaveGState(context); 43ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextClipToRect(context, rect); 44ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 45ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextScaleCTM(context, 1, -1); 46ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextDrawLayerAtPoint(context, CGPointMake(0, -m_size.height()), m_cgLayer.get()); 47ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 48ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextRestoreGState(context); 49ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return; 50ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch } 5165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 52ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(m_bitmapContext); 5365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch paintBitmapContext(context, m_bitmapContext.get(), rect.location(), rect); 5465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch} 5565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 56ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen MurdochCGContextRef BackingStore::backingStoreContext() 5765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch{ 58ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_cgLayer) 59ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return CGLayerGetContext(m_cgLayer.get()); 6065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 61ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // Try to create a layer. 62ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (CGContextRef containingWindowContext = m_webPageProxy->containingWindowGraphicsContext()) { 63ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_cgLayer.adoptCF(CGLayerCreateWithContext(containingWindowContext, NSSizeToCGSize(m_size), 0)); 64ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextRef layerContext = CGLayerGetContext(m_cgLayer.get()); 65ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 66ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextSetBlendMode(layerContext, kCGBlendModeCopy); 67ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 68ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // We want the origin to be in the top left corner so flip the backing store context. 69ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextTranslateCTM(layerContext, 0, m_size.height()); 70ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextScaleCTM(layerContext, 1, -1); 71ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 72ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_bitmapContext) { 73ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // Paint the contents of the bitmap into the layer context. 74ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch paintBitmapContext(layerContext, m_bitmapContext.get(), CGPointZero, CGRectMake(0, 0, m_size.width(), m_size.height())); 75ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch m_bitmapContext = nullptr; 76ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch } 77ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 78ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return layerContext; 79ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch } 8065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 8165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch if (!m_bitmapContext) { 8265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch RetainPtr<CGColorSpaceRef> colorSpace(AdoptCF, CGColorSpaceCreateDeviceRGB()); 8365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 8465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch m_bitmapContext.adoptCF(CGBitmapContextCreate(0, m_size.width(), m_size.height(), 8, m_size.width() * 4, colorSpace.get(), kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host)); 85ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 86ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextSetBlendMode(m_bitmapContext.get(), kCGBlendModeCopy); 87ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 8865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch // We want the origin to be in the top left corner so flip the backing store context. 8965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch CGContextTranslateCTM(m_bitmapContext.get(), 0, m_size.height()); 9065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch CGContextScaleCTM(m_bitmapContext.get(), 1, -1); 9165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch } 9265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 93ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return m_bitmapContext.get(); 94ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch} 95ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 96ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochvoid BackingStore::incorporateUpdate(ShareableBitmap* bitmap, const UpdateInfo& updateInfo) 97ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch{ 98ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextRef context = backingStoreContext(); 99ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 100ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch scroll(updateInfo.scrollRect, updateInfo.scrollOffset); 10165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 10265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch IntPoint updateRectLocation = updateInfo.updateRectBounds.location(); 10365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 104ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch GraphicsContext graphicsContext(context); 10565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 10665f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch // Paint all update rects. 10765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch for (size_t i = 0; i < updateInfo.updateRects.size(); ++i) { 10865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch IntRect updateRect = updateInfo.updateRects[i]; 10965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch IntRect srcRect = updateRect; 11065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch srcRect.move(-updateRectLocation.x(), -updateRectLocation.y()); 11165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 11265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch bitmap->paint(graphicsContext, updateRect.location(), srcRect); 11365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch } 11465f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch} 11565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 116ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochvoid BackingStore::scroll(const IntRect& scrollRect, const IntSize& scrollOffset) 11765f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch{ 118ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (scrollOffset.isZero()) 11965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch return; 12065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 121ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch if (m_cgLayer) { 122ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextRef layerContext = CGLayerGetContext(m_cgLayer.get()); 12365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 124ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch // Scroll the layer by painting it into itself with the given offset. 125ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextSaveGState(layerContext); 126ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextClipToRect(layerContext, scrollRect); 127ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextScaleCTM(layerContext, 1, -1); 128ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextDrawLayerAtPoint(layerContext, CGPointMake(scrollOffset.width(), -m_size.height() - scrollOffset.height()), m_cgLayer.get()); 129ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextRestoreGState(layerContext); 13065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 131ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch return; 132ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch } 133ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch 134ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch ASSERT(m_bitmapContext); 13565f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 136ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextSaveGState(m_bitmapContext.get()); 137ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGContextClipToRect(m_bitmapContext.get(), scrollRect); 138ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch CGPoint destination = CGPointMake(scrollRect.x() + scrollOffset.width(), scrollRect.y() + scrollOffset.height()); 139ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch paintBitmapContext(m_bitmapContext.get(), m_bitmapContext.get(), destination, scrollRect); 14065f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch CGContextRestoreGState(m_bitmapContext.get()); 14165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch} 14265f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch 14365f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch} // namespace WebKit 144