1/* 2 * Copyright (C) 2013-2014 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 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 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 "LayerPool.h" 28#include "PlatformCALayer.h" 29#include <wtf/StringExtras.h> 30 31#if USE(CA) 32 33namespace WebCore { 34 35static GraphicsLayer::PlatformLayerID generateLayerID() 36{ 37 static GraphicsLayer::PlatformLayerID layerID; 38 return ++layerID; 39} 40 41#if COMPILER(MSVC) 42const float PlatformCALayer::webLayerWastedSpaceThreshold = 0.75f; 43#endif 44 45PlatformCALayer::PlatformCALayer(LayerType layerType, PlatformCALayerClient* owner) 46 : m_layerType(layerType) 47 , m_layerID(generateLayerID()) 48 , m_owner(owner) 49{ 50} 51 52PlatformCALayer::~PlatformCALayer() 53{ 54 // Clear the owner, which also clears it in the delegate to prevent attempts 55 // to use the GraphicsLayerCA after it has been destroyed. 56 setOwner(nullptr); 57} 58 59void PlatformCALayer::drawRepaintIndicator(CGContextRef context, PlatformCALayer* platformCALayer, int repaintCount, CGColorRef customBackgroundColor) 60{ 61 char text[16]; // that's a lot of repaints 62 snprintf(text, sizeof(text), "%d", repaintCount); 63 64 CGRect indicatorBox = platformCALayer->bounds(); 65 indicatorBox.size.width = 12 + 10 * strlen(text); 66 indicatorBox.size.height = 27; 67 CGContextSaveGState(context); 68 69 CGContextSetAlpha(context, 0.5f); 70 CGContextBeginTransparencyLayerWithRect(context, indicatorBox, 0); 71 72 if (customBackgroundColor) 73 CGContextSetFillColorWithColor(context, customBackgroundColor); 74 else 75 CGContextSetRGBFillColor(context, 0, 0.5f, 0.25f, 1); 76 77 CGContextFillRect(context, indicatorBox); 78 79 if (platformCALayer->acceleratesDrawing()) 80 CGContextSetRGBFillColor(context, 1, 0, 0, 1); 81 else 82 CGContextSetRGBFillColor(context, 1, 1, 1, 1); 83 84#pragma clang diagnostic push 85#pragma clang diagnostic ignored "-Wdeprecated-declarations" 86 CGContextSetTextMatrix(context, CGAffineTransformMakeScale(1, -1)); 87 CGContextSelectFont(context, "Helvetica", 22, kCGEncodingMacRoman); 88 CGContextShowTextAtPoint(context, indicatorBox.origin.x + 5, indicatorBox.origin.y + 22, text, strlen(text)); 89#pragma clang diagnostic pop 90 91 CGContextEndTransparencyLayer(context); 92 CGContextRestoreGState(context); 93} 94 95PassRefPtr<PlatformCALayer> PlatformCALayer::createCompatibleLayerOrTakeFromPool(PlatformCALayer::LayerType layerType, PlatformCALayerClient* client, IntSize size) 96{ 97 RefPtr<PlatformCALayer> layer; 98 99 if ((layer = layerPool().takeLayerWithSize(size))) { 100 layer->setOwner(client); 101 return layer.release(); 102 } 103 104 layer = createCompatibleLayer(layerType, client); 105 layer->setBounds(FloatRect(FloatPoint(), size)); 106 107 return layer.release(); 108} 109 110void PlatformCALayer::moveToLayerPool() 111{ 112 ASSERT(!superlayer()); 113 layerPool().addLayer(this); 114} 115 116LayerPool& PlatformCALayer::layerPool() 117{ 118 static LayerPool* sharedPool = new LayerPool; 119 return *sharedPool; 120} 121 122} 123 124#endif // USE(CA) 125