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// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/content_layer_updater.h"
#include "base/debug/trace_event.h"
#include "base/time.h"
#include "cc/layer_painter.h"
#include "cc/rendering_stats.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "third_party/skia/include/core/SkRect.h"
#include "third_party/skia/include/core/SkScalar.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/gfx/rect_f.h"
namespace cc {
ContentLayerUpdater::ContentLayerUpdater(scoped_ptr<LayerPainter> painter)
: m_painter(painter.Pass())
{
}
ContentLayerUpdater::~ContentLayerUpdater()
{
}
void ContentLayerUpdater::paintContents(SkCanvas* canvas, const gfx::Rect& contentRect, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats& stats)
{
TRACE_EVENT0("cc", "ContentLayerUpdater::paintContents");
canvas->save();
canvas->translate(SkFloatToScalar(-contentRect.x()), SkFloatToScalar(-contentRect.y()));
gfx::Rect layerRect = contentRect;
if (contentsWidthScale != 1 || contentsHeightScale != 1) {
canvas->scale(SkFloatToScalar(contentsWidthScale), SkFloatToScalar(contentsHeightScale));
gfx::RectF rect = gfx::ScaleRect(contentRect, 1 / contentsWidthScale, 1 / contentsHeightScale);
layerRect = gfx::ToEnclosingRect(rect);
}
SkPaint paint;
paint.setAntiAlias(false);
paint.setXfermodeMode(SkXfermode::kClear_Mode);
SkRect layerSkRect = SkRect::MakeXYWH(layerRect.x(), layerRect.y(), layerRect.width(), layerRect.height());
canvas->drawRect(layerSkRect, paint);
canvas->clipRect(layerSkRect);
gfx::RectF opaqueLayerRect;
base::TimeTicks paintBeginTime = base::TimeTicks::Now();
m_painter->paint(canvas, layerRect, opaqueLayerRect);
stats.totalPaintTimeInSeconds += (base::TimeTicks::Now() - paintBeginTime).InSecondsF();
canvas->restore();
stats.totalPixelsPainted += contentRect.width() * contentRect.height();
gfx::RectF opaqueContentRect = gfx::ScaleRect(opaqueLayerRect, contentsWidthScale, contentsHeightScale);
resultingOpaqueRect = gfx::ToEnclosedRect(opaqueContentRect);
m_contentRect = contentRect;
}
} // namespace cc
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