Refactor blits

base/gfx/blit.h

Index: base/gfx/blit.h
diff --git a/base/gfx/blit.h b/base/gfx/blit.h
new file mode 100644
index 0000000000000000000000000000000000000000..25f7a5e998f144aef79e1fe5b8673f73b66a715d
--- /dev/null
+++ b/base/gfx/blit.h
@@ -0,0 +1,47 @@
+// Copyright (c) 2009 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 BASE_GFX_BLIT_H_
+#define BASE_GFX_BLIT_H_
+
+#include "base/gfx/native_widget_types.h"
+#include "base/gfx/point.h"
+#include "base/gfx/rect.h"
+
+namespace skia {
+class PlatformCanvas;
+}  // namespace skia
+
+namespace gfx {
+
+class Point;
+class Rect;
+
+// Blits a rectangle from the source context into the destination context.
+void BlitContextToContext(NativeDrawingContext dst_context,
+                          const Rect& dst_rect,
+                          NativeDrawingContext src_context,
+                          const Point& src_origin);
+
+// Blits a rectangle from the source context into the destination canvas.
+void BlitContextToCanvas(skia::PlatformCanvas *dst_canvas,
+                         const Rect& dst_rect,
+                         NativeDrawingContext src_context,
+                         const Point& src_origin);
+
+// Blits a rectangle from the source canvas into the destination context.
+void BlitCanvasToContext(NativeDrawingContext dst_context,
+                         const Rect& dst_rect,
+                         skia::PlatformCanvas *src_canvas,
+                         const Point& src_origin);
+
+// Blits a rectangle from the source canvas into the destination canvas.
+void BlitCanvasToCanvas(skia::PlatformCanvas *dst_canvas,
+                        const Rect& dst_rect,
+                        skia::PlatformCanvas *src_canvas,
+                        const Point& src_origin);
+
+}  // namespace gfx
+
+#endif  // BASE_GFX_BLIT_H_