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 UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_ 6 #define UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_ 7 8 #include "base/basictypes.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "skia/ext/refptr.h" 11 #include "ui/ozone/ozone_base_export.h" 12 13 class SkCanvas; 14 15 namespace gfx { 16 class Size; 17 class VSyncProvider; 18 } 19 20 namespace ui { 21 22 // The platform-specific part of an software output. The class is intended 23 // for use when no EGL/GLES2 acceleration is possible. 24 // This class owns any bits that the ozone implementation needs freed when 25 // the software output is destroyed. 26 class OZONE_BASE_EXPORT SurfaceOzoneCanvas { 27 public: ~SurfaceOzoneCanvas()28 virtual ~SurfaceOzoneCanvas() {} 29 30 // Returns an SkCanvas for drawing on the window. 31 virtual skia::RefPtr<SkCanvas> GetCanvas() = 0; 32 33 // Attempts to resize the canvas to match the viewport size. After 34 // resizing, the compositor must call GetCanvas() to get the next 35 // canvas - this invalidates any previous canvas from GetCanvas(). 36 virtual void ResizeCanvas(const gfx::Size& viewport_size) = 0; 37 38 // Present the current canvas. After presenting, the compositor must 39 // call GetCanvas() to get the next canvas - this invalidates any 40 // previous canvas from GetCanvas(). 41 // 42 // The implementation may assume that any pixels outside the damage 43 // rectangle are unchanged since the previous call to PresentCanvas(). 44 virtual void PresentCanvas(const gfx::Rect& damage) = 0; 45 46 // Returns a gfx::VsyncProvider for this surface. Note that this may be 47 // called after we have entered the sandbox so if there are operations (e.g. 48 // opening a file descriptor providing vsync events) that must be done 49 // outside of the sandbox, they must have been completed in 50 // InitializeHardware. Returns an empty scoped_ptr on error. 51 virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() = 0; 52 }; 53 54 } // namespace ui 55 56 #endif // UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_ 57