ui/gfx/image/image_skia_rep.h

   1 // Copyright (c) 2012 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_IMAGE_IMAGE_SKIA_REP_H_
   6 #define UI_GFX_IMAGE_IMAGE_SKIA_REP_H_
   7
   8 #include "third_party/skia/include/core/SkBitmap.h"
   9 #include "ui/base/layout.h"
  10 #include "ui/base/ui_export.h"
  11 #include "ui/gfx/size.h"
  12
  13 namespace gfx {
  14
  15 // An ImageSkiaRep represents a bitmap and the scale factor it is intended for.
  16 class UI_EXPORT ImageSkiaRep {
  17  public:
  18   // Create null bitmap.
  19   ImageSkiaRep();
  20   ~ImageSkiaRep();
  21
  22   // Creates a bitmap with kARGB_8888_Config config with given |size| in DIP.
  23   // This allocates pixels in the bitmap.
  24   ImageSkiaRep(const gfx::Size& size, ui::ScaleFactor scale_factor);
  25
  26   // Creates a bitmap with given scale factor.
  27   // Adds ref to |src|.
  28   ImageSkiaRep(const SkBitmap& src, ui::ScaleFactor scale_factor);
  29
  30   // Returns true if the backing bitmap is null.
  31   bool is_null() const { return bitmap_.isNull(); }
  32
  33   // Get width and height of bitmap in DIP.
  34   int GetWidth() const;
  35   int GetHeight() const;
  36
  37   // Get width and height of bitmap in pixels.
  38   int pixel_width() const { return bitmap_.width(); }
  39   int pixel_height() const { return bitmap_.height(); }
  40   Size pixel_size() const {
  41     return Size(pixel_width(), pixel_height());
  42   }
  43
  44   // Retrieves the scale that the bitmap will be painted at.
  45   float GetScale() const;
  46   ui::ScaleFactor scale_factor() const { return scale_factor_; }
  47
  48   // Returns backing bitmap.
  49   const SkBitmap& sk_bitmap() const { return bitmap_; }
  50
  51  private:
  52   friend class ImageSkia;
  53   SkBitmap& mutable_sk_bitmap() { return bitmap_; }
  54
  55   SkBitmap bitmap_;
  56   ui::ScaleFactor scale_factor_;
  57 };
  58
  59 }  // namespace gfx
  60
  61 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_REP_H_