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| 1 /* | |
| 2 * Copyright (C) 2004, 2006, 2007 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 COMPUTER, 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 COMPUTER, 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 "sky/engine/config.h" | |
| 27 #include "sky/engine/core/rendering/RenderHTMLCanvas.h" | |
| 28 | |
| 29 #include "sky/engine/core/frame/FrameView.h" | |
| 30 #include "sky/engine/core/frame/LocalFrame.h" | |
| 31 #include "sky/engine/core/html/HTMLCanvasElement.h" | |
| 32 #include "sky/engine/core/html/canvas/CanvasRenderingContext.h" | |
| 33 #include "sky/engine/core/page/Page.h" | |
| 34 #include "sky/engine/core/rendering/PaintInfo.h" | |
| 35 #include "sky/engine/core/rendering/RenderView.h" | |
| 36 | |
| 37 namespace blink { | |
| 38 | |
| 39 RenderHTMLCanvas::RenderHTMLCanvas(HTMLCanvasElement* element) | |
| 40 : RenderReplaced(element, element->size()) | |
| 41 { | |
| 42 } | |
| 43 | |
| 44 LayerType RenderHTMLCanvas::layerTypeRequired() const | |
| 45 { | |
| 46 return NormalLayer; | |
| 47 } | |
| 48 | |
| 49 void RenderHTMLCanvas::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& pa
intOffset) | |
| 50 { | |
| 51 GraphicsContext* context = paintInfo.context; | |
| 52 | |
| 53 LayoutRect contentRect = contentBoxRect(); | |
| 54 contentRect.moveBy(paintOffset); | |
| 55 LayoutRect paintRect = replacedContentRect(); | |
| 56 paintRect.moveBy(paintOffset); | |
| 57 | |
| 58 bool clip = !contentRect.contains(paintRect); | |
| 59 if (clip) { | |
| 60 // Not allowed to overflow the content box. | |
| 61 paintInfo.context->save(); | |
| 62 paintInfo.context->clip(pixelSnappedIntRect(contentRect)); | |
| 63 } | |
| 64 | |
| 65 // FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast
is set. | |
| 66 // See bug for more details: crbug.com/353716. | |
| 67 InterpolationQuality interpolationQuality = style()->imageRendering() == Ima
geRenderingOptimizeContrast ? InterpolationLow : CanvasDefaultInterpolationQuali
ty; | |
| 68 | |
| 69 HTMLCanvasElement* canvas = toHTMLCanvasElement(node()); | |
| 70 LayoutSize layoutSize = contentRect.size(); | |
| 71 if (style()->imageRendering() == ImageRenderingPixelated | |
| 72 && (layoutSize.width() > canvas->width() || layoutSize.height() > canvas
->height() || layoutSize == canvas->size())) { | |
| 73 interpolationQuality = InterpolationNone; | |
| 74 } | |
| 75 | |
| 76 InterpolationQuality previousInterpolationQuality = context->imageInterpolat
ionQuality(); | |
| 77 context->setImageInterpolationQuality(interpolationQuality); | |
| 78 canvas->paint(context, paintRect); | |
| 79 context->setImageInterpolationQuality(previousInterpolationQuality); | |
| 80 | |
| 81 if (clip) | |
| 82 context->restore(); | |
| 83 } | |
| 84 | |
| 85 void RenderHTMLCanvas::canvasSizeChanged() | |
| 86 { | |
| 87 IntSize canvasSize = toHTMLCanvasElement(node())->size(); | |
| 88 | |
| 89 if (canvasSize == intrinsicSize()) | |
| 90 return; | |
| 91 | |
| 92 setIntrinsicSize(canvasSize); | |
| 93 | |
| 94 if (!parent()) | |
| 95 return; | |
| 96 | |
| 97 if (!preferredLogicalWidthsDirty()) | |
| 98 setPreferredLogicalWidthsDirty(); | |
| 99 | |
| 100 LayoutSize oldSize = size(); | |
| 101 updateLogicalWidth(); | |
| 102 updateLogicalHeight(); | |
| 103 if (oldSize == size()) | |
| 104 return; | |
| 105 | |
| 106 if (!selfNeedsLayout()) | |
| 107 setNeedsLayout(); | |
| 108 } | |
| 109 | |
| 110 } // namespace blink | |
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