Makes the browser send pixels to the GPU process where it should

content/browser/renderer_host/dip_util.h

+// 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 CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_
+#define CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_
+#pragma once
+
+#include "content/common/content_export.h"
+
+namespace gfx {
+class Point;
+class Rect;
+class Size;
+}  // namespace gfx
+
+namespace content {
+class RenderWidgetHostView;
+
+// Returns scale factor used to convert from DIP to pixel coordinate systems.
+// Returns 1.0 if DIP is not enabled.
+CONTENT_EXPORT float GetDIPScaleFactor(const RenderWidgetHostView* view);
+
+// Utility functions that convert point/size/rect between DIP and pixel
+// coordinate system.
+CONTENT_EXPORT gfx::Point ConvertPointToDIP(const RenderWidgetHostView* view,
+                                            const gfx::Point& point_in_pixel);
+CONTENT_EXPORT gfx::Size ConvertSizeToDIP(const RenderWidgetHostView* view,
+                                          const gfx::Size& size_in_pixel);
+CONTENT_EXPORT gfx::Rect ConvertRectToDIP(const RenderWidgetHostView* view,
+                                          const gfx::Rect& rect_in_pixel);
+CONTENT_EXPORT gfx::Point ConvertPointToPixel(const RenderWidgetHostView* view,
+                                              const gfx::Point& point_in_dip);
+CONTENT_EXPORT gfx::Size ConvertSizeToPixel(const RenderWidgetHostView* view,
+                                            const gfx::Size& size_in_dip);
+CONTENT_EXPORT gfx::Rect ConvertRectToPixel(const RenderWidgetHostView* view,
+                                            const gfx::Rect& rect_in_dip);
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_DIP_UTIL_H_