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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_
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