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78 lines
3.3 KiB
C++
78 lines
3.3 KiB
C++
/*
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* Copyright (C) 2012 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "platform/graphics/OpaqueRectTrackingContentLayerDelegate.h"
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#include "platform/EventTracer.h"
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#include "platform/geometry/IntRect.h"
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#include "platform/graphics/GraphicsContext.h"
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#include "platform/transforms/AffineTransform.h"
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#include "public/platform/WebFloatRect.h"
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#include "public/platform/WebRect.h"
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namespace blink {
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OpaqueRectTrackingContentLayerDelegate::OpaqueRectTrackingContentLayerDelegate(GraphicsContextPainter* painter)
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: m_painter(painter)
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, m_opaque(false)
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{
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}
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OpaqueRectTrackingContentLayerDelegate::~OpaqueRectTrackingContentLayerDelegate()
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{
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}
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void OpaqueRectTrackingContentLayerDelegate::paintContents(
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SkCanvas* canvas, const WebRect& clip, bool canPaintLCDText, WebFloatRect& opaque,
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WebContentLayerClient::GraphicsContextStatus contextStatus)
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{
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static const unsigned char* annotationsEnabled = 0;
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if (UNLIKELY(!annotationsEnabled))
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annotationsEnabled = EventTracer::getTraceCategoryEnabledFlag(TRACE_DISABLED_BY_DEFAULT("blink.graphics_context_annotations"));
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GraphicsContext context(canvas,
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contextStatus == WebContentLayerClient::GraphicsContextEnabled ? GraphicsContext::NothingDisabled : GraphicsContext::FullyDisabled);
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context.setRegionTrackingMode(m_opaque ? GraphicsContext::RegionTrackingDisabled : GraphicsContext::RegionTrackingOpaque);
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context.setCertainlyOpaque(m_opaque);
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context.setShouldSmoothFonts(canPaintLCDText);
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if (*annotationsEnabled)
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context.setAnnotationMode(AnnotateAll);
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// Record transform prior to painting, as all opaque tracking will be
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// relative to this current value.
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AffineTransform canvasToContentTransform = context.getCTM().inverse();
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m_painter->paint(context, clip);
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// Transform tracked opaque paints back to our layer's content space.
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ASSERT(canvasToContentTransform.isInvertible());
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ASSERT(canvasToContentTransform.preservesAxisAlignment());
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opaque = canvasToContentTransform.mapRect(context.opaqueRegion().asRect());
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}
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} // namespace blink
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