chrome/browser/ui/libgtk2ui/skia_utils_gtk2.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 CHROME_BROWSER_UI_LIBGTK2UI_SKIA_UTILS_GTK2_H_
   6 #define CHROME_BROWSER_UI_LIBGTK2UI_SKIA_UTILS_GTK2_H_
   7
   8 #include "third_party/skia/include/core/SkColor.h"
   9
  10 typedef struct _GdkColor GdkColor;
  11 typedef struct _GdkPixbuf GdkPixbuf;
  12
  13 class SkBitmap;
  14
  15 // Define a macro for creating GdkColors from RGB values.  This is a macro to
  16 // allow static construction of literals, etc.  Use this like:
  17 //   GdkColor white = GDK_COLOR_RGB(0xff, 0xff, 0xff);
  18 #define GDK_COLOR_RGB(r, g, b) {0, r * ::libgtk2ui::kSkiaToGDKMultiplier,  \
  19         g * ::libgtk2ui::kSkiaToGDKMultiplier,                          \
  20         b * ::libgtk2ui::kSkiaToGDKMultiplier}
  21
  22 namespace libgtk2ui {
  23
  24 // Multiply uint8 color components by this.
  25 const int kSkiaToGDKMultiplier = 257;
  26
  27 // Converts GdkColors to the ARGB layout Skia expects.
  28 SkColor GdkColorToSkColor(GdkColor color);
  29
  30 // Converts ARGB to GdkColor.
  31 GdkColor SkColorToGdkColor(SkColor color);
  32
  33 const SkBitmap GdkPixbufToImageSkia(GdkPixbuf* pixbuf);
  34
  35 // Convert and copy a SkBitmap to a GdkPixbuf. NOTE: this uses BGRAToRGBA, so
  36 // it is an expensive operation.  The returned GdkPixbuf will have a refcount of
  37 // 1, and the caller is responsible for unrefing it when done.
  38 GdkPixbuf* GdkPixbufFromSkBitmap(const SkBitmap& bitmap);
  39
  40 }  // namespace libgtk2ui
  41
  42 #endif  // CHROME_BROWSER_UI_LIBGTK2UI_SKIA_UTILS_GTK2_H_