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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_
#define COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_
#include <IOSurface/IOSurfaceRef.h>
#include <list>
#include <memory>
#include "base/apple/scoped_cftyperef.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "components/viz/service/display/software_output_device.h"
#include "components/viz/service/viz_service_export.h"
#include "third_party/skia/include/core/SkRefCnt.h"
#include "third_party/skia/include/core/SkRegion.h"
class SkCanvas;
namespace viz {
class VIZ_SERVICE_EXPORT SoftwareOutputDeviceMac : public SoftwareOutputDevice {
public:
explicit SoftwareOutputDeviceMac(
scoped_refptr<base::SequencedTaskRunner> task_runner);
SoftwareOutputDeviceMac(const SoftwareOutputDeviceMac&) = delete;
SoftwareOutputDeviceMac& operator=(const SoftwareOutputDeviceMac&) = delete;
~SoftwareOutputDeviceMac() override;
// SoftwareOutputDevice implementation.
void Resize(const gfx::Size& pixel_size, float scale_factor) override;
SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override;
void EndPaint() override;
void DiscardBackbuffer() override;
void EnsureBackbuffer() override;
gfx::VSyncProvider* GetVSyncProvider() override;
// Testing methods.
SkRegion LastCopyRegionForTesting() const {
return last_copy_region_for_testing_;
}
IOSurfaceRef CurrentPaintIOSurfaceForTesting() const {
return current_paint_buffer_->io_surface.get();
}
size_t BufferQueueSizeForTesting() const { return buffer_queue_.size(); }
private:
struct Buffer {
Buffer();
~Buffer();
base::apple::ScopedCFTypeRef<IOSurfaceRef> io_surface;
// The damage of all BeginPaints since this buffer was the back buffer.
SkRegion accumulated_damage;
};
// Copy the pixels from the previous buffer to the new buffer, and union
// |new_damage_rect| into all |buffer_queue_|'s accumulated damages.
void UpdateAndCopyBufferDamage(Buffer* previous_paint_buffer,
const SkRegion& new_damage_rect);
gfx::Size pixel_size_;
float scale_factor_ = 1;
// The queue of buffers. The back is the most recently painted buffer
// (sometimes equal to |current_paint_buffer_|), and the front is the
// least recently painted buffer.
std::list<std::unique_ptr<Buffer>> buffer_queue_;
// A pointer to the last element of |buffer_queue_| during paint. It is only
// valid between BeginPaint and EndPaint.
raw_ptr<Buffer> current_paint_buffer_ = nullptr;
// The SkCanvas wraps the mapped |current_paint_buffer_|'s IOSurface. It is
// valid only between BeginPaint and EndPaint.
std::unique_ptr<SkCanvas> current_paint_canvas_;
SkRegion last_copy_region_for_testing_;
};
} // namespace viz
#endif // COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_
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