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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/layers/content_layer.h"
#include "base/auto_reset.h"
#include "base/metrics/histogram.h"
#include "base/time/time.h"
#include "cc/layers/content_layer_client.h"
#include "cc/resources/bitmap_content_layer_updater.h"
#include "cc/resources/bitmap_skpicture_content_layer_updater.h"
#include "cc/resources/layer_painter.h"
#include "cc/trees/layer_tree_host.h"
namespace cc {
ContentLayerPainter::ContentLayerPainter(ContentLayerClient* client)
: client_(client) {}
scoped_ptr<ContentLayerPainter> ContentLayerPainter::Create(
ContentLayerClient* client) {
return make_scoped_ptr(new ContentLayerPainter(client));
}
void ContentLayerPainter::Paint(SkCanvas* canvas,
gfx::Rect content_rect,
gfx::RectF* opaque) {
base::TimeTicks paint_start = base::TimeTicks::HighResNow();
client_->PaintContents(canvas, content_rect, opaque);
base::TimeTicks paint_end = base::TimeTicks::HighResNow();
// The start and end times might be the same if the paint was very fast or if
// our timer granularity is poor. Treat this as a very short time duration
// instead of none to avoid dividing by zero.
if (paint_end == paint_start)
paint_end += base::TimeDelta::FromMicroseconds(1);
double pixels_per_sec = (content_rect.width() * content_rect.height()) /
(paint_end - paint_start).InSecondsF();
UMA_HISTOGRAM_CUSTOM_COUNTS("Renderer4.AccelContentPaintDurationMS",
(paint_end - paint_start).InMilliseconds(),
0,
120,
30);
UMA_HISTOGRAM_CUSTOM_COUNTS("Renderer4.AccelContentPaintMegapixPerSecond",
pixels_per_sec / 1000000,
10,
210,
30);
}
scoped_refptr<ContentLayer> ContentLayer::Create(ContentLayerClient* client) {
return make_scoped_refptr(new ContentLayer(client));
}
ContentLayer::ContentLayer(ContentLayerClient* client)
: TiledLayer(),
client_(client),
can_use_lcd_text_last_frame_(can_use_lcd_text()) {
}
ContentLayer::~ContentLayer() {}
bool ContentLayer::DrawsContent() const {
return TiledLayer::DrawsContent() && client_;
}
void ContentLayer::SetLayerTreeHost(LayerTreeHost* host) {
TiledLayer::SetLayerTreeHost(host);
if (!updater_.get())
return;
if (host) {
updater_->set_rendering_stats_instrumentation(
host->rendering_stats_instrumentation());
} else {
updater_->set_rendering_stats_instrumentation(NULL);
}
}
void ContentLayer::SetTexturePriorities(
const PriorityCalculator& priority_calc) {
// Update the tile data before creating all the layer's tiles.
UpdateTileSizeAndTilingOption();
TiledLayer::SetTexturePriorities(priority_calc);
}
bool ContentLayer::Update(ResourceUpdateQueue* queue,
const OcclusionTracker* occlusion) {
{
base::AutoReset<bool> ignore_set_needs_commit(&ignore_set_needs_commit_,
true);
CreateUpdaterIfNeeded();
UpdateCanUseLCDText();
}
bool updated = TiledLayer::Update(queue, occlusion);
return updated;
}
bool ContentLayer::NeedMoreUpdates() {
return NeedsIdlePaint();
}
LayerUpdater* ContentLayer::Updater() const {
return updater_.get();
}
void ContentLayer::CreateUpdaterIfNeeded() {
if (updater_.get())
return;
scoped_ptr<LayerPainter> painter =
ContentLayerPainter::Create(client_).PassAs<LayerPainter>();
if (layer_tree_host()->settings().per_tile_painting_enabled) {
updater_ = BitmapSkPictureContentLayerUpdater::Create(
painter.Pass(),
rendering_stats_instrumentation(),
id());
} else {
updater_ = BitmapContentLayerUpdater::Create(
painter.Pass(),
rendering_stats_instrumentation(),
id());
}
updater_->SetOpaque(contents_opaque());
SetTextureFormat(
layer_tree_host()->GetRendererCapabilities().best_texture_format);
}
void ContentLayer::SetContentsOpaque(bool opaque) {
Layer::SetContentsOpaque(opaque);
if (updater_.get())
updater_->SetOpaque(opaque);
}
void ContentLayer::UpdateCanUseLCDText() {
if (can_use_lcd_text_last_frame_ == can_use_lcd_text())
return;
can_use_lcd_text_last_frame_ = can_use_lcd_text();
if (client_)
client_->DidChangeLayerCanUseLCDText();
}
bool ContentLayer::SupportsLCDText() const {
return true;
}
skia::RefPtr<SkPicture> ContentLayer::GetPicture() const {
if (!DrawsContent())
return skia::RefPtr<SkPicture>();
int width = bounds().width();
int height = bounds().height();
gfx::RectF opaque;
skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
SkCanvas* canvas = picture->beginRecording(width, height);
client_->PaintContents(canvas, gfx::Rect(width, height), &opaque);
picture->endRecording();
return picture;
}
} // namespace cc
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