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// Copyright 2010 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.h"
#include "base/auto_reset.h"
#include "base/debug/trace_event.h"
#include "base/metrics/histogram.h"
#include "base/time.h"
#include "cc/bitmap_content_layer_updater.h"
#include "cc/bitmap_skpicture_content_layer_updater.h"
#include "cc/content_layer_client.h"
#include "cc/layer_painter.h"
#include "cc/layer_tree_host.h"
namespace cc {
ContentLayerPainter::ContentLayerPainter(ContentLayerClient* client)
: m_client(client)
{
}
scoped_ptr<ContentLayerPainter> ContentLayerPainter::create(ContentLayerClient* client)
{
return make_scoped_ptr(new ContentLayerPainter(client));
}
void ContentLayerPainter::paint(SkCanvas* canvas, gfx::Rect contentRect, gfx::RectF& opaque)
{
base::TimeTicks paintStart = base::TimeTicks::HighResNow();
m_client->paintContents(canvas, contentRect, opaque);
base::TimeTicks paintEnd = base::TimeTicks::HighResNow();
double pixelsPerSec = (contentRect.width() * contentRect.height()) / (paintEnd - paintStart).InSecondsF();
HISTOGRAM_CUSTOM_COUNTS("Renderer4.AccelContentPaintDurationMS", (paintEnd - paintStart).InMilliseconds(), 0, 120, 30);
HISTOGRAM_CUSTOM_COUNTS("Renderer4.AccelContentPaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
}
const int ContentLayer::kLCDTextMaxChangeCount = 1;
scoped_refptr<ContentLayer> ContentLayer::create(ContentLayerClient* client)
{
return make_scoped_refptr(new ContentLayer(client));
}
ContentLayer::ContentLayer(ContentLayerClient* client)
: TiledLayer()
, m_client(client)
, m_useLCDText(false)
, m_lcdTextChangeCount(0)
{
}
ContentLayer::~ContentLayer()
{
}
bool ContentLayer::drawsContent() const
{
return TiledLayer::drawsContent() && m_client;
}
void ContentLayer::setTexturePriorities(const PriorityCalculator& priorityCalc)
{
// Update the tile data before creating all the layer's tiles.
updateTileSizeAndTilingOption();
TiledLayer::setTexturePriorities(priorityCalc);
}
void ContentLayer::update(ResourceUpdateQueue& queue, const OcclusionTracker* occlusion, RenderingStats& stats)
{
{
base::AutoReset<bool> ignoreSetNeedsCommit(&m_ignoreSetNeedsCommit, true);
createUpdaterIfNeeded();
updateUseLCDText();
}
TiledLayer::update(queue, occlusion, stats);
m_needsDisplay = false;
}
bool ContentLayer::needMoreUpdates()
{
return needsIdlePaint();
}
LayerUpdater* ContentLayer::updater() const
{
return m_updater.get();
}
void ContentLayer::createUpdaterIfNeeded()
{
if (m_updater)
return;
scoped_ptr<LayerPainter> painter = ContentLayerPainter::create(m_client).PassAs<LayerPainter>();
if (layerTreeHost()->settings().acceleratePainting)
m_updater = SkPictureContentLayerUpdater::create(painter.Pass());
else if (layerTreeHost()->settings().perTilePaintingEnabled)
m_updater = BitmapSkPictureContentLayerUpdater::create(painter.Pass());
else
m_updater = BitmapContentLayerUpdater::create(painter.Pass());
m_updater->setOpaque(contentsOpaque());
unsigned textureFormat = layerTreeHost()->rendererCapabilities().bestTextureFormat;
setTextureFormat(textureFormat);
}
void ContentLayer::setContentsOpaque(bool opaque)
{
Layer::setContentsOpaque(opaque);
if (m_updater)
m_updater->setOpaque(opaque);
}
void ContentLayer::updateUseLCDText()
{
if (m_useLCDText == drawProperties().can_use_lcd_text)
return;
if (!useLCDTextWillChange())
return;
m_useLCDText = drawProperties().can_use_lcd_text;
useLCDTextDidChange();
}
bool ContentLayer::useLCDTextWillChange() const
{
// Always allow disabling LCD text.
if (m_useLCDText)
return true;
return m_lcdTextChangeCount < kLCDTextMaxChangeCount;
}
void ContentLayer::useLCDTextDidChange()
{
if (m_lcdTextChangeCount > 0) {
// Do not record the first time LCD text is enabled because
// it does not really cause any invalidation.
TRACE_EVENT_INSTANT0("cc", "ContentLayer::canUseLCDTextDidChange");
}
++m_lcdTextChangeCount;
// Need to repaint the layer with different text AA setting.
setNeedsDisplay();
}
} // namespace cc
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