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// Copyright (c) 2012 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.
#include "ui/gfx/skia_utils_gtk.h"
#include <gdk/gdk.h>
namespace gfx {
const int kSkiaToGDKMultiplier = 257;
// GDK_COLOR_RGB multiplies by 257 (= 0x10001) to distribute the bits evenly
// See: http://www.mindcontrol.org/~hplus/graphics/expand-bits.html
// To get back, we can just right shift by eight
// (or, formulated differently, i == (i*257)/256 for all i < 256).
SkColor GdkColorToSkColor(GdkColor color) {
return SkColorSetRGB(color.red >> 8, color.green >> 8, color.blue >> 8);
}
GdkColor SkColorToGdkColor(SkColor color) {
GdkColor gdk_color = {
0,
static_cast<guint16>(SkColorGetR(color) * kSkiaToGDKMultiplier),
static_cast<guint16>(SkColorGetG(color) * kSkiaToGDKMultiplier),
static_cast<guint16>(SkColorGetB(color) * kSkiaToGDKMultiplier)
};
return gdk_color;
}
} // namespace gfx
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