| // 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_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_ |
| #define CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_ |
| |
| #include "base/basictypes.h" |
| #include "cc/base/cc_export.h" |
| #include "skia/ext/refptr.h" |
| // TODO(robertphillips): change this to "class SkBaseDevice;" |
| #include "third_party/skia/include/core/SkDevice.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/gfx/size.h" |
| #include "ui/gfx/vector2d.h" |
| |
| class SkBitmap; |
| class SkCanvas; |
| |
| namespace cc { |
| |
| class SoftwareFrameData; |
| |
| // This is a "tear-off" class providing software drawing support to |
| // OutputSurface, such as to a platform-provided window framebuffer. |
| class CC_EXPORT SoftwareOutputDevice { |
| public: |
| SoftwareOutputDevice(); |
| virtual ~SoftwareOutputDevice(); |
| |
| // Discards any pre-existing backing buffers and allocates memory for a |
| // software device of |size|. This must be called before the |
| // |SoftwareOutputDevice| can be used in other ways. |
| virtual void Resize(gfx::Size size); |
| |
| // Called on BeginDrawingFrame. The compositor will draw into the returned |
| // SkCanvas. The |SoftwareOutputDevice| implementation needs to provide a |
| // valid SkCanvas of at least size |damage_rect|. This class retains ownership |
| // of the SkCanvas. |
| virtual SkCanvas* BeginPaint(gfx::Rect damage_rect); |
| |
| // Called on FinishDrawingFrame. The compositor will no longer mutate the the |
| // SkCanvas instance returned by |BeginPaint| and should discard any reference |
| // that it holds to it. |
| virtual void EndPaint(SoftwareFrameData* frame_data); |
| |
| // Copies pixels inside |rect| from the current software framebuffer to |
| // |output|. Fails if there is no current softwareframebuffer. |
| virtual void CopyToBitmap(gfx::Rect rect, SkBitmap* output); |
| |
| // Blit the pixel content of the SoftwareOutputDevice by |delta| with the |
| // write clipped to |clip_rect|. |
| virtual void Scroll(gfx::Vector2d delta, |
| gfx::Rect clip_rect); |
| |
| // Discard the backing buffer in the surface provided by this instance. |
| virtual void DiscardBackbuffer() {} |
| |
| // Ensures that there is a backing buffer available on this instance. |
| virtual void EnsureBackbuffer() {} |
| |
| // TODO(skaslev) Remove this after UberCompositor lands. |
| // Called in response to receiving a SwapBuffersAck. At this point, software |
| // frame identified by id can be reused or discarded as it is no longer being |
| // displayed. |
| virtual void ReclaimSoftwareFrame(unsigned id); |
| |
| protected: |
| gfx::Size viewport_size_; |
| gfx::Rect damage_rect_; |
| skia::RefPtr<SkBaseDevice> device_; |
| skia::RefPtr<SkCanvas> canvas_; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDevice); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_ |