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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "config.h" | 5 #include "config.h" |
6 #include "core/paint/SVGImagePainter.h" | 6 #include "core/paint/SVGImagePainter.h" |
7 | 7 |
8 #include "core/paint/ObjectPainter.h" | 8 #include "core/paint/ObjectPainter.h" |
9 #include "core/rendering/GraphicsContextAnnotator.h" | 9 #include "core/rendering/GraphicsContextAnnotator.h" |
10 #include "core/rendering/ImageQualityController.h" | 10 #include "core/rendering/ImageQualityController.h" |
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35 GraphicsContextStateSaver stateSaver(*childPaintInfo.context, false); | 35 GraphicsContextStateSaver stateSaver(*childPaintInfo.context, false); |
36 | 36 |
37 childPaintInfo.applyTransform(m_renderSVGImage.localToParentTransform(), &st
ateSaver); | 37 childPaintInfo.applyTransform(m_renderSVGImage.localToParentTransform(), &st
ateSaver); |
38 | 38 |
39 if (!m_renderSVGImage.objectBoundingBox().isEmpty()) { | 39 if (!m_renderSVGImage.objectBoundingBox().isEmpty()) { |
40 // SVGRenderingContext may taint the state - make sure we're always savi
ng. | 40 // SVGRenderingContext may taint the state - make sure we're always savi
ng. |
41 stateSaver.saveIfNeeded(); | 41 stateSaver.saveIfNeeded(); |
42 | 42 |
43 SVGRenderingContext renderingContext(&m_renderSVGImage, childPaintInfo); | 43 SVGRenderingContext renderingContext(&m_renderSVGImage, childPaintInfo); |
44 if (renderingContext.isRenderingPrepared()) { | 44 if (renderingContext.isRenderingPrepared()) { |
45 if (m_renderSVGImage.style()->svgStyle().bufferedRendering() == BR_S
TATIC && renderingContext.bufferForeground(m_renderSVGImage.bufferedForeground()
)) | 45 if (m_renderSVGImage.style()->svgStyle().bufferedRendering() == BR_S
TATIC && bufferForeground(childPaintInfo)) |
46 return; | 46 return; |
47 | 47 |
48 paintForeground(m_renderSVGImage, childPaintInfo); | 48 paintForeground(childPaintInfo); |
49 } | 49 } |
50 } | 50 } |
51 | 51 |
52 if (m_renderSVGImage.style()->outlineWidth()) | 52 if (m_renderSVGImage.style()->outlineWidth()) |
53 ObjectPainter(m_renderSVGImage).paintOutline(childPaintInfo, IntRect(bou
ndingBox)); | 53 ObjectPainter(m_renderSVGImage).paintOutline(childPaintInfo, IntRect(bou
ndingBox)); |
54 } | 54 } |
55 | 55 |
56 void SVGImagePainter::paintForeground(RenderSVGImage& renderer, PaintInfo& paint
Info) | 56 static IntSize estimateBufferSize(const AffineTransform& transform, const IntSiz
e& boundingBox) |
57 { | 57 { |
58 RefPtr<Image> image = renderer.imageResource()->image(); | 58 // This is supposed to be the exact same calculation as GraphicsContext::cre
ateRasterBuffer performs. |
59 FloatRect destRect = renderer.objectBoundingBox(); | 59 int estimatedWidth = static_cast<int>(ceil(boundingBox.width() * transform.x
Scale())); |
| 60 int estimatedHeight = static_cast<int>(ceil(boundingBox.height() * transform
.yScale())); |
| 61 return IntSize(estimatedWidth, estimatedHeight); |
| 62 } |
| 63 |
| 64 bool SVGImagePainter::bufferForeground(PaintInfo& paintInfo) |
| 65 { |
| 66 FloatRect boundingBox = m_renderSVGImage.objectBoundingBox(); |
| 67 OwnPtr<ImageBuffer>& imageBuffer = m_renderSVGImage.bufferedForeground(); |
| 68 IntSize expandedBoundingBox = expandedIntSize(boundingBox.size()); |
| 69 |
| 70 // Invalidate an existing buffer if the scale is not correct. |
| 71 if (imageBuffer) { |
| 72 IntSize estimatedBufferSize = estimateBufferSize(paintInfo.context->getC
TM(), expandedBoundingBox); |
| 73 if (estimatedBufferSize != imageBuffer->size()) |
| 74 imageBuffer.clear(); |
| 75 } |
| 76 |
| 77 // Create a new buffer and paint the foreground into it. |
| 78 if (!imageBuffer) { |
| 79 imageBuffer = paintInfo.context->createRasterBuffer(expandedBoundingBox)
; |
| 80 if (!imageBuffer) |
| 81 return false; |
| 82 |
| 83 GraphicsContext* bufferedRenderingContext = imageBuffer->context(); |
| 84 bufferedRenderingContext->translate(-boundingBox.x(), -boundingBox.y()); |
| 85 PaintInfo bufferedInfo(paintInfo); |
| 86 bufferedInfo.context = bufferedRenderingContext; |
| 87 paintForeground(bufferedInfo); |
| 88 } |
| 89 |
| 90 paintInfo.context->drawImageBuffer(imageBuffer.get(), boundingBox); |
| 91 return true; |
| 92 } |
| 93 |
| 94 void SVGImagePainter::paintForeground(PaintInfo& paintInfo) |
| 95 { |
| 96 RefPtr<Image> image = m_renderSVGImage.imageResource()->image(); |
| 97 FloatRect destRect = m_renderSVGImage.objectBoundingBox(); |
60 FloatRect srcRect(0, 0, image->width(), image->height()); | 98 FloatRect srcRect(0, 0, image->width(), image->height()); |
61 | 99 |
62 SVGImageElement* imageElement = toSVGImageElement(renderer.element()); | 100 SVGImageElement* imageElement = toSVGImageElement(m_renderSVGImage.element()
); |
63 imageElement->preserveAspectRatio()->currentValue()->transformRect(destRect,
srcRect); | 101 imageElement->preserveAspectRatio()->currentValue()->transformRect(destRect,
srcRect); |
64 | 102 |
65 InterpolationQuality interpolationQuality = InterpolationDefault; | 103 InterpolationQuality interpolationQuality = InterpolationDefault; |
66 if (renderer.style()->svgStyle().bufferedRendering() != BR_STATIC) | 104 if (m_renderSVGImage.style()->svgStyle().bufferedRendering() != BR_STATIC) |
67 interpolationQuality = ImageQualityController::imageQualityController()-
>chooseInterpolationQuality(paintInfo.context, &renderer, image.get(), image.get
(), LayoutSize(destRect.size())); | 105 interpolationQuality = ImageQualityController::imageQualityController()-
>chooseInterpolationQuality(paintInfo.context, &m_renderSVGImage, image.get(), i
mage.get(), LayoutSize(destRect.size())); |
68 | 106 |
69 InterpolationQuality previousInterpolationQuality = paintInfo.context->image
InterpolationQuality(); | 107 InterpolationQuality previousInterpolationQuality = paintInfo.context->image
InterpolationQuality(); |
70 paintInfo.context->setImageInterpolationQuality(interpolationQuality); | 108 paintInfo.context->setImageInterpolationQuality(interpolationQuality); |
71 paintInfo.context->drawImage(image.get(), destRect, srcRect, CompositeSource
Over); | 109 paintInfo.context->drawImage(image.get(), destRect, srcRect, CompositeSource
Over); |
72 paintInfo.context->setImageInterpolationQuality(previousInterpolationQuality
); | 110 paintInfo.context->setImageInterpolationQuality(previousInterpolationQuality
); |
73 } | 111 } |
74 | 112 |
75 } // namespace blink | 113 } // namespace blink |
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