1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_ 6 #define COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_ 7 8 #include <IOSurface/IOSurface.h> 9 #include <list> 10 11 #include "base/mac/scoped_cftyperef.h" 12 #include "base/macros.h" 13 #include "components/viz/service/display/software_output_device.h" 14 #include "components/viz/service/viz_service_export.h" 15 #include "third_party/skia/include/core/SkRefCnt.h" 16 #include "third_party/skia/include/core/SkRegion.h" 17 18 class SkCanvas; 19 20 namespace viz { 21 22 class VIZ_SERVICE_EXPORT SoftwareOutputDeviceMac : public SoftwareOutputDevice { 23 public: 24 explicit SoftwareOutputDeviceMac( 25 scoped_refptr<base::SequencedTaskRunner> task_runner); 26 ~SoftwareOutputDeviceMac() override; 27 28 // SoftwareOutputDevice implementation. 29 void Resize(const gfx::Size& pixel_size, float scale_factor) override; 30 SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override; 31 void EndPaint() override; 32 void DiscardBackbuffer() override; 33 void EnsureBackbuffer() override; 34 gfx::VSyncProvider* GetVSyncProvider() override; 35 36 // Testing methods. LastCopyRegionForTesting()37 SkRegion LastCopyRegionForTesting() const { 38 return last_copy_region_for_testing_; 39 } CurrentPaintIOSurfaceForTesting()40 IOSurfaceRef CurrentPaintIOSurfaceForTesting() const { 41 return current_paint_buffer_->io_surface.get(); 42 } BufferQueueSizeForTesting()43 size_t BufferQueueSizeForTesting() const { return buffer_queue_.size(); } 44 45 private: 46 struct Buffer { 47 Buffer(); 48 ~Buffer(); 49 base::ScopedCFTypeRef<IOSurfaceRef> io_surface; 50 // The damage of all BeginPaints since this buffer was the back buffer. 51 SkRegion accumulated_damage; 52 }; 53 54 // Copy the pixels from the previous buffer to the new buffer, and union 55 // |new_damage_rect| into all |buffer_queue_|'s accumulated damages. 56 void UpdateAndCopyBufferDamage(Buffer* previous_paint_buffer, 57 const SkRegion& new_damage_rect); 58 59 gfx::Size pixel_size_; 60 float scale_factor_ = 1; 61 62 // The queue of buffers. The back is the most recently painted buffer 63 // (sometimes equal to |current_paint_buffer_|), and the front is the 64 // least recently painted buffer. 65 std::list<std::unique_ptr<Buffer>> buffer_queue_; 66 67 // A pointer to the last element of |buffer_queue_| during paint. It is only 68 // valid between BeginPaint and EndPaint. 69 Buffer* current_paint_buffer_ = nullptr; 70 71 // The SkCanvas wraps the mapped |current_paint_buffer_|'s IOSurface. It is 72 // valid only between BeginPaint and EndPaint. 73 std::unique_ptr<SkCanvas> current_paint_canvas_; 74 75 SkRegion last_copy_region_for_testing_; 76 77 DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDeviceMac); 78 }; 79 80 } // namespace viz 81 82 #endif // COMPONENTS_VIZ_SERVICE_DISPLAY_EMBEDDER_SOFTWARE_OUTPUT_DEVICE_MAC_H_ 83