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// Copyright 2014 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 UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_
#define UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "skia/ext/refptr.h"
#include "ui/ozone/ozone_base_export.h"
class SkSurface;
namespace gfx {
class Size;
class VSyncProvider;
}
namespace ui {
// The platform-specific part of an software output. The class is intended
// for use when no EGL/GLES2 acceleration is possible.
// This class owns any bits that the ozone implementation needs freed when
// the software output is destroyed.
class OZONE_BASE_EXPORT SurfaceOzoneCanvas {
public:
virtual ~SurfaceOzoneCanvas() {}
// Returns an SkSurface for drawing on the window.
virtual skia::RefPtr<SkSurface> GetSurface() = 0;
// Attempts to resize the canvas to match the viewport size. After
// resizing, the compositor must call GetCanvas() to get the next
// canvas - this invalidates any previous canvas from GetCanvas().
virtual void ResizeCanvas(const gfx::Size& viewport_size) = 0;
// Present the current canvas. After presenting, the compositor must
// call GetCanvas() to get the next canvas - this invalidates any
// previous canvas from GetCanvas().
//
// The implementation may assume that any pixels outside the damage
// rectangle are unchanged since the previous call to PresentCanvas().
virtual void PresentCanvas(const gfx::Rect& damage) = 0;
// Returns a gfx::VsyncProvider for this surface. Note that this may be
// called after we have entered the sandbox so if there are operations (e.g.
// opening a file descriptor providing vsync events) that must be done
// outside of the sandbox, they must have been completed in
// InitializeHardware. Returns an empty scoped_ptr on error.
virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() = 0;
};
} // namespace ui
#endif // UI_OZONE_PUBLIC_SURFACE_OZONE_CANVAS_H_
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