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// Copyright 2012 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.
#ifndef CC_PLAYBACK_PICTURE_H_
#define CC_PLAYBACK_PICTURE_H_
#include "base/basictypes.h"
#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/cc_export.h"
#include "cc/base/region.h"
#include "cc/playback/pixel_ref_map.h"
#include "cc/playback/recording_source.h"
#include "skia/ext/refptr.h"
#include "third_party/skia/include/core/SkPicture.h"
#include "ui/gfx/geometry/rect.h"
class SkPixelRef;
namespace base {
class Value;
}
namespace skia {
class AnalysisCanvas;
}
namespace cc {
class ContentLayerClient;
class CC_EXPORT Picture
: public base::RefCountedThreadSafe<Picture> {
public:
static scoped_refptr<Picture> Create(
const gfx::Rect& layer_rect,
ContentLayerClient* client,
const gfx::Size& tile_grid_size,
bool gather_pixels_refs,
RecordingSource::RecordingMode recording_mode);
static scoped_refptr<Picture> CreateFromValue(const base::Value* value);
static scoped_refptr<Picture> CreateFromSkpValue(const base::Value* value);
gfx::Rect LayerRect() const { return layer_rect_; }
// Has Record() been called yet?
bool HasRecording() const { return picture_.get() != NULL; }
bool IsSuitableForGpuRasterization(const char** reason) const;
int ApproximateOpCount() const;
size_t ApproximateMemoryUsage() const;
bool HasText() const;
// Apply this scale and raster the negated region into the canvas.
// |negated_content_region| specifies the region to be clipped out of the
// raster operation, i.e., the parts of the canvas which will not get drawn
// to.
int Raster(SkCanvas* canvas,
SkPicture::AbortCallback* callback,
const Region& negated_content_region,
float contents_scale) const;
// Draw the picture directly into the given canvas, without applying any
// clip/scale/layer transformations.
void Replay(SkCanvas* canvas, SkPicture::AbortCallback* callback = NULL);
scoped_ptr<base::Value> AsValue() const;
void EmitTraceSnapshot() const;
void EmitTraceSnapshotAlias(Picture* original) const;
bool WillPlayBackBitmaps() const { return picture_->willPlayBackBitmaps(); }
PixelRefMap::Iterator GetPixelRefMapIterator(
const gfx::Rect& layer_rect) const;
private:
Picture(const gfx::Rect& layer_rect, const gfx::Size& tile_grid_size);
// This constructor assumes SkPicture is already ref'd and transfers
// ownership to this picture.
Picture(const skia::RefPtr<SkPicture>&,
const gfx::Rect& layer_rect,
const PixelRefMap& pixel_refs);
// This constructor will call AdoptRef on the SkPicture.
Picture(SkPicture*, const gfx::Rect& layer_rect);
~Picture();
// Record a paint operation. To be able to safely use this SkPicture for
// playback on a different thread this can only be called once.
void Record(ContentLayerClient* client,
RecordingSource::RecordingMode recording_mode);
// Gather pixel refs from recording.
void GatherPixelRefs();
gfx::Rect layer_rect_;
skia::RefPtr<SkPicture> picture_;
PixelRefMap pixel_refs_;
scoped_refptr<base::trace_event::ConvertableToTraceFormat>
AsTraceableRasterData(float scale) const;
scoped_refptr<base::trace_event::ConvertableToTraceFormat>
AsTraceableRecordData() const;
friend class base::RefCountedThreadSafe<Picture>;
friend class PixelRefMap::Iterator;
DISALLOW_COPY_AND_ASSIGN(Picture);
};
} // namespace cc
#endif // CC_PLAYBACK_PICTURE_H_
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