1 files changed, 67 insertions, 0 deletions
diff --git a/app/gfx/gtk_util.h b/app/gfx/gtk_util.h
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+++ b/app/gfx/gtk_util.h
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+// Copyright (c) 2009 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 BASE_GFX_GTK_UTIL_H_
+#define BASE_GFX_GTK_UTIL_H_
+
+#include <stdint.h>
+#include <vector>
+
+#include <glib-object.h>
+
+#include "base/scoped_ptr.h"
+
+typedef struct _GdkColor GdkColor;
+typedef struct _GdkPixbuf GdkPixbuf;
+typedef struct _GdkRegion GdkRegion;
+
+class SkBitmap;
+
+const int kSkiaToGDKMultiplier = 257;
+
+// Define a macro for creating GdkColors from RGB values.  This is a macro to
+// allow static construction of literals, etc.  Use this like:
+//   GdkColor white = GDK_COLOR_RGB(0xff, 0xff, 0xff);
+#define GDK_COLOR_RGB(r, g, b) {0, r * kSkiaToGDKMultiplier, \
+        g * kSkiaToGDKMultiplier, b * kSkiaToGDKMultiplier}
+
+namespace gfx {
+
+class Rect;
+
+extern const GdkColor kGdkWhite;
+extern const GdkColor kGdkBlack;
+extern const GdkColor kGdkGreen;
+
+// Convert and copy a SkBitmap to a GdkPixbuf. NOTE: this uses BGRAToRGBA, so
+// it is an expensive operation.
+GdkPixbuf* GdkPixbufFromSkBitmap(const SkBitmap* bitmap);
+
+// Modify the given region by subtracting the given rectangles.
+void SubtractRectanglesFromRegion(GdkRegion* region,
+                                  const std::vector<Rect>& cutouts);
+
+}  // namespace gfx
+
+namespace {
+// A helper class that will g_object_unref |p| when it goes out of scope.
+// This never adds a ref, it only unrefs.
+template <typename Type>
+struct GObjectUnrefer {
+  void operator()(Type* ptr) const {
+    if (ptr)
+      g_object_unref(ptr);
+  }
+};
+}  // namespace
+
+// It's not legal C++ to have a templatized typedefs, so we wrap it in a
+// struct.  When using this, you need to include ::Type.  E.g.,
+// ScopedGObject<GdkPixbufLoader>::Type loader(gdk_pixbuf_loader_new());
+template<class T>
+struct ScopedGObject {
+  typedef scoped_ptr_malloc<T, GObjectUnrefer<T> > Type;
+};
+
+#endif  // BASE_GFX_GTK_UTIL_H_