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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 {
SOURCE_FORMAT_RGBA8,
SOURCE_FORMAT_BGRA8
};
static SourceDataFormat Format() {
return SK_B32_SHIFT ? SOURCE_FORMAT_RGBA8 : SOURCE_FORMAT_BGRA8;
}
// Returns the most efficient texture format for this platform.
static GLenum BestTextureFormat(WebKit::WebGraphicsContext3D* context,
bool supports_bgra8888) {
GLenum texture_format = GL_RGBA;
switch (Format()) {
case SOURCE_FORMAT_RGBA8:
break;
case SOURCE_FORMAT_BGRA8:
if (supports_bgra8888)
texture_format = GL_BGRA_EXT;
break;
default:
NOTREACHED();
break;
}
return texture_format;
}
// Return true if the given texture format has the same component order
// as the color on this platform.
static bool SameComponentOrder(GLenum texture_format) {
switch (Format()) {
case SOURCE_FORMAT_RGBA8:
return texture_format == GL_RGBA;
case SOURCE_FORMAT_BGRA8:
return texture_format == GL_BGRA_EXT;
default:
NOTREACHED();
return false;
}
}
};
} // namespace cc
#endif // CC_PLATFORM_COLOR_H_
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