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// Copyright 2011 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 CC_PLATFORM_COLOR_H_
#define CC_PLATFORM_COLOR_H_
#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
#include "third_party/khronos/GLES2/gl2.h"
#include "third_party/khronos/GLES2/gl2ext.h"
#include "third_party/skia/include/core/SkTypes.h"
namespace cc {
class PlatformColor {
public:
enum SourceDataFormat { SourceFormatRGBA8, SourceFormatBGRA8 };
static SourceDataFormat format()
{
return SK_B32_SHIFT ? SourceFormatRGBA8 : SourceFormatBGRA8;
}
// Returns the most efficient texture format for this platform.
static GLenum bestTextureFormat(WebKit::WebGraphicsContext3D* context, bool supportsBGRA8888)
{
GLenum textureFormat = GL_RGBA;
switch (format()) {
case SourceFormatRGBA8:
break;
case SourceFormatBGRA8:
if (supportsBGRA8888)
textureFormat = GL_BGRA_EXT;
break;
default:
NOTREACHED();
break;
}
return textureFormat;
}
// Return true if the given texture format has the same component order
// as the color on this platform.
static bool sameComponentOrder(GLenum textureFormat)
{
switch (format()) {
case SourceFormatRGBA8:
return textureFormat == GL_RGBA;
case SourceFormatBGRA8:
return textureFormat == GL_BGRA_EXT;
default:
NOTREACHED();
return false;
}
}
};
} // namespace cc
#endif // CC_PLATFORM_COLOR_H_
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