ui/gfx: Move CanvasPaintWin into its own file.

This fix the TODO for ben@ in canvas_skia.cc.

R=ben@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9453019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@123598 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 37 insertions, 0 deletions

diff --git a/ui/gfx/canvas_paint.h b/ui/gfx/canvas_paint.h
new file mode 100644
index 0000000..105aea3
--- /dev/null
+++ b/ui/gfx/canvas_paint.h
@@ -0,0 +1,37 @@
+// Copyright (c) 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 UI_GFX_CANVAS_PAINT_H_
+#define UI_GFX_CANVAS_PAINT_H_
+#pragma once
+
+#include "ui/base/ui_export.h"
+#include "ui/gfx/native_widget_types.h"
+
+namespace gfx {
+
+class Canvas;
+class Rect;
+
+class CanvasPaint {
+ public:
+  // Creates a canvas that paints to |view| when it is destroyed. The canvas is
+  // sized to the client area of |view|.
+  UI_EXPORT static CanvasPaint* CreateCanvasPaint(gfx::NativeView view);
+
+  virtual ~CanvasPaint() {}
+
+  // Returns true if the canvas has an invalid rect that needs to be repainted.
+  virtual bool IsValid() const = 0;
+
+  // Returns the rectangle that is invalid.
+  virtual gfx::Rect GetInvalidRect() const = 0;
+
+  // Returns the underlying Canvas.
+  virtual Canvas* AsCanvas() = 0;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_CANVAS_PAINT_H_