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