ui/gfx/blit.h

   1 // Copyright (c) 2011 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_GFX_BLIT_H_
   6 #define UI_GFX_BLIT_H_
   7
   8 #include "ui/gfx/native_widget_types.h"
   9 #include "ui/base/ui_export.h"
  10
  11 class SkCanvas;
  12
  13 namespace gfx {
  14
  15 class Point;
  16 class Rect;
  17 class Vector2d;
  18
  19 // Blits a rectangle from the source context into the destination context.
  20 UI_EXPORT void BlitContextToContext(NativeDrawingContext dst_context,
  21                                     const Rect& dst_rect,
  22                                     NativeDrawingContext src_context,
  23                                     const Point& src_origin);
  24
  25 // Blits a rectangle from the source context into the destination canvas.
  26 UI_EXPORT void BlitContextToCanvas(SkCanvas *dst_canvas,
  27                                    const Rect& dst_rect,
  28                                    NativeDrawingContext src_context,
  29                                    const Point& src_origin);
  30
  31 // Blits a rectangle from the source canvas into the destination context.
  32 UI_EXPORT void BlitCanvasToContext(NativeDrawingContext dst_context,
  33                                    const Rect& dst_rect,
  34                                    SkCanvas *src_canvas,
  35                                    const Point& src_origin);
  36
  37 // Blits a rectangle from the source canvas into the destination canvas.
  38 UI_EXPORT void BlitCanvasToCanvas(SkCanvas *dst_canvas,
  39                                   const Rect& dst_rect,
  40                                   SkCanvas *src_canvas,
  41                                   const Point& src_origin);
  42
  43 // Scrolls the given subset of the given canvas by the given offset.
  44 // The canvas should not have a clip or a transform applied, since platforms
  45 // may implement those operations differently.
  46 UI_EXPORT void ScrollCanvas(SkCanvas* canvas,
  47                             const Rect& clip,
  48                             const Vector2d& offset);
  49
  50 }  // namespace gfx
  51
  52 #endif  // UI_GFX_BLIT_H_