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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "config.h" | |
| 6 | |
| 7 #include "platform/graphics/RecordingImageBufferSurface.h" | |
| 8 | |
| 9 #include "platform/graphics/GraphicsContext.h" | |
| 10 #include "platform/graphics/ImageBuffer.h" | |
| 11 #include "public/platform/Platform.h" | |
| 12 #include "third_party/skia/include/core/SkCanvas.h" | |
| 13 #include "third_party/skia/include/core/SkPictureRecorder.h" | |
| 14 #include "wtf/PassOwnPtr.h" | |
| 15 #include "wtf/PassRefPtr.h" | |
| 16 | |
| 17 namespace blink { | |
| 18 | |
| 19 RecordingImageBufferSurface::RecordingImageBufferSurface(const IntSize& size, Op
acityMode opacityMode) | |
| 20 : ImageBufferSurface(size, opacityMode) | |
| 21 , m_imageBuffer(0) | |
| 22 , m_initialSaveCount(0) | |
| 23 , m_frameWasCleared(true) | |
| 24 { | |
| 25 initializeCurrentFrame(); | |
| 26 } | |
| 27 | |
| 28 RecordingImageBufferSurface::~RecordingImageBufferSurface() | |
| 29 { } | |
| 30 | |
| 31 void RecordingImageBufferSurface::initializeCurrentFrame() | |
| 32 { | |
| 33 static SkRTreeFactory rTreeFactory; | |
| 34 m_currentFrame = adoptPtr(new SkPictureRecorder); | |
| 35 m_currentFrame->beginRecording(size().width(), size().height(), &rTreeFactor
y); | |
| 36 m_initialSaveCount = m_currentFrame->getRecordingCanvas()->getSaveCount(); | |
| 37 if (m_imageBuffer) { | |
| 38 m_imageBuffer->context()->resetCanvas(m_currentFrame->getRecordingCanvas
()); | |
| 39 m_imageBuffer->context()->setRegionTrackingMode(GraphicsContext::RegionT
rackingOverwrite); | |
| 40 } | |
| 41 } | |
| 42 | |
| 43 void RecordingImageBufferSurface::setImageBuffer(ImageBuffer* imageBuffer) | |
| 44 { | |
| 45 m_imageBuffer = imageBuffer; | |
| 46 if (m_currentFrame && m_imageBuffer) { | |
| 47 m_imageBuffer->context()->setRegionTrackingMode(GraphicsContext::RegionT
rackingOverwrite); | |
| 48 m_imageBuffer->context()->resetCanvas(m_currentFrame->getRecordingCanvas
()); | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 void RecordingImageBufferSurface::willAccessPixels() | |
| 53 { | |
| 54 fallBackToRasterCanvas(); | |
| 55 } | |
| 56 | |
| 57 void RecordingImageBufferSurface::fallBackToRasterCanvas() | |
| 58 { | |
| 59 if (m_rasterCanvas) { | |
| 60 ASSERT(!m_currentFrame); | |
| 61 return; | |
| 62 } | |
| 63 | |
| 64 m_rasterCanvas = adoptPtr(SkCanvas::NewRasterN32(size().width(), size().heig
ht())); | |
| 65 | |
| 66 if (m_previousFrame) { | |
| 67 m_previousFrame->draw(m_rasterCanvas.get()); | |
| 68 m_previousFrame.clear(); | |
| 69 } | |
| 70 if (m_currentFrame) { | |
| 71 RefPtr<SkPicture> currentPicture = adoptRef(m_currentFrame->endRecording
()); | |
| 72 currentPicture->draw(m_rasterCanvas.get()); | |
| 73 m_currentFrame.clear(); | |
| 74 } | |
| 75 | |
| 76 if (m_imageBuffer) { | |
| 77 m_imageBuffer->context()->setRegionTrackingMode(GraphicsContext::RegionT
rackingDisabled); | |
| 78 m_imageBuffer->context()->resetCanvas(m_rasterCanvas.get()); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 SkCanvas* RecordingImageBufferSurface::canvas() const | |
| 83 { | |
| 84 if (m_rasterCanvas) | |
| 85 return m_rasterCanvas.get(); | |
| 86 | |
| 87 ASSERT(m_currentFrame->getRecordingCanvas()); | |
| 88 return m_currentFrame->getRecordingCanvas(); | |
| 89 } | |
| 90 | |
| 91 PassRefPtr<SkPicture> RecordingImageBufferSurface::getPicture() | |
| 92 { | |
| 93 bool canUsePicture = finalizeFrameInternal(); | |
| 94 m_imageBuffer->didFinalizeFrame(); | |
| 95 | |
| 96 if (canUsePicture) { | |
| 97 return m_previousFrame; | |
| 98 } | |
| 99 | |
| 100 if (!m_rasterCanvas) | |
| 101 fallBackToRasterCanvas(); | |
| 102 return nullptr; | |
| 103 } | |
| 104 | |
| 105 void RecordingImageBufferSurface::finalizeFrame(const FloatRect &) | |
| 106 { | |
| 107 if (!finalizeFrameInternal() && !m_rasterCanvas) { | |
| 108 fallBackToRasterCanvas(); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 void RecordingImageBufferSurface::didClearCanvas() | |
| 113 { | |
| 114 m_frameWasCleared = true; | |
| 115 } | |
| 116 | |
| 117 bool RecordingImageBufferSurface::finalizeFrameInternal() | |
| 118 { | |
| 119 if (!m_imageBuffer->isDirty()) { | |
| 120 if (m_currentFrame && !m_previousFrame) { | |
| 121 // Create an initial blank frame | |
| 122 m_previousFrame = adoptRef(m_currentFrame->endRecording()); | |
| 123 initializeCurrentFrame(); | |
| 124 } | |
| 125 return m_currentFrame; | |
| 126 } | |
| 127 | |
| 128 if (!m_currentFrame) { | |
| 129 return false; | |
| 130 } | |
| 131 | |
| 132 IntRect canvasRect(IntPoint(0, 0), size()); | |
| 133 if (!m_frameWasCleared && !m_imageBuffer->context()->opaqueRegion().asRect()
.contains(canvasRect)) { | |
| 134 return false; | |
| 135 } | |
| 136 | |
| 137 SkCanvas* oldCanvas = m_currentFrame->getRecordingCanvas(); // Could be rast
er or picture | |
| 138 | |
| 139 // FIXME(crbug.com/392614): handle transferring complex state from the curre
nt picture to the new one. | |
| 140 if (oldCanvas->getSaveCount() > m_initialSaveCount) | |
| 141 return false; | |
| 142 | |
| 143 if (!oldCanvas->isClipRect()) | |
| 144 return false; | |
| 145 | |
| 146 SkMatrix ctm = oldCanvas->getTotalMatrix(); | |
| 147 SkRect clip; | |
| 148 oldCanvas->getClipBounds(&clip); | |
| 149 | |
| 150 m_previousFrame = adoptRef(m_currentFrame->endRecording()); | |
| 151 initializeCurrentFrame(); | |
| 152 | |
| 153 SkCanvas* newCanvas = m_currentFrame->getRecordingCanvas(); | |
| 154 newCanvas->concat(ctm); | |
| 155 newCanvas->clipRect(clip); | |
| 156 | |
| 157 m_frameWasCleared = false; | |
| 158 return true; | |
| 159 } | |
| 160 | |
| 161 } // namespace blink | |
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Chromium Code Reviews
Issue 678483002:
Remove RecordingImageBufferSurface (Closed)
Base URL: https://github.com/domokit/mojo.git@master