Source/core/paint/HTMLCanvasPainter.cpp - Issue 754083003: Make image-rendering:pixelated use nearest neighbor when downscaling.

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Issue 754083003: Make image-rendering:pixelated use nearest neighbor when downscaling. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Sync and rebase Created 6 years ago

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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/HTMLCanvasPainter.h"	6 #include "core/paint/HTMLCanvasPainter.h"

7	7

8 #include "core/html/HTMLCanvasElement.h"	8 #include "core/html/HTMLCanvasElement.h"

9 #include "core/paint/ClipRecorder.h"	9 #include "core/paint/ClipRecorder.h"

10 #include "core/paint/RenderDrawingRecorder.h"	10 #include "core/paint/RenderDrawingRecorder.h"

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25	25

26 PaintInfo localPaintInfo(paintInfo);	26 PaintInfo localPaintInfo(paintInfo);

27 OwnPtr<ClipRecorder> clipRecorder;	27 OwnPtr<ClipRecorder> clipRecorder;

28 bool clip = !contentRect.contains(paintRect);	28 bool clip = !contentRect.contains(paintRect);

29 if (clip)	29 if (clip)

30 clipRecorder = adoptPtr(new ClipRecorder(m_renderHTMLCanvas, paintInfo, contentRect));	30 clipRecorder = adoptPtr(new ClipRecorder(m_renderHTMLCanvas, paintInfo, contentRect));

31	31

32 // FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast is set.	32 // FIXME: InterpolationNone should be used if ImageRenderingOptimizeContrast is set.

33 // See bug for more details: crbug.com/353716.	33 // See bug for more details: crbug.com/353716.

34 InterpolationQuality interpolationQuality = m_renderHTMLCanvas.style()->imag eRendering() == ImageRenderingOptimizeContrast ? InterpolationLow : CanvasDefaul tInterpolationQuality;	34 InterpolationQuality interpolationQuality = m_renderHTMLCanvas.style()->imag eRendering() == ImageRenderingOptimizeContrast ? InterpolationLow : CanvasDefaul tInterpolationQuality;

35	35 if (m_renderHTMLCanvas.style()->imageRendering() == ImageRenderingPixelated)

36 HTMLCanvasElement* canvas = toHTMLCanvasElement(m_renderHTMLCanvas.node());

37 LayoutSize layoutSize = contentRect.size();

38 if (m_renderHTMLCanvas.style()->imageRendering() == ImageRenderingPixelated

39 && (layoutSize.width() > canvas->width() \|\| layoutSize.height() > canvas ->height() \|\| layoutSize == canvas->size())) {

40 interpolationQuality = InterpolationNone;	36 interpolationQuality = InterpolationNone;

41 }

42	37

43 RenderDrawingRecorder recorder(context, &m_renderHTMLCanvas, localPaintInfo. phase, pixelSnappedIntRect(paintRect));	38 RenderDrawingRecorder recorder(context, &m_renderHTMLCanvas, localPaintInfo. phase, pixelSnappedIntRect(paintRect));

44 InterpolationQuality previousInterpolationQuality = context->imageInterpolat ionQuality();	39 InterpolationQuality previousInterpolationQuality = context->imageInterpolat ionQuality();

45 context->setImageInterpolationQuality(interpolationQuality);	40 context->setImageInterpolationQuality(interpolationQuality);

46 canvas->paint(context, paintRect);	41 toHTMLCanvasElement(m_renderHTMLCanvas.node())->paint(context, paintRect);

47 context->setImageInterpolationQuality(previousInterpolationQuality);	42 context->setImageInterpolationQuality(previousInterpolationQuality);

48 }	43 }

49	44

50 } // namespace blink	45 } // namespace blink

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