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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_RESOURCES_PLATFORM_COLOR_H_
#define CC_RESOURCES_PLATFORM_COLOR_H_
#include "base/logging.h"
#include "base/macros.h"
#include "cc/resources/resource_format.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 ResourceFormat BestTextureFormat() {
switch (Format()) {
case SOURCE_FORMAT_BGRA8:
return BGRA_8888;
case SOURCE_FORMAT_RGBA8:
return RGBA_8888;
}
NOTREACHED();
return RGBA_8888;
}
// Returns the most efficient supported texture format for this platform.
static ResourceFormat BestSupportedTextureFormat(bool supports_bgra8888) {
switch (Format()) {
case SOURCE_FORMAT_BGRA8:
return (supports_bgra8888) ? BGRA_8888 : RGBA_8888;
case SOURCE_FORMAT_RGBA8:
return RGBA_8888;
}
NOTREACHED();
return RGBA_8888;
}
// Return true if the given texture format has the same component order
// as the color on this platform.
static bool SameComponentOrder(ResourceFormat format) {
switch (Format()) {
case SOURCE_FORMAT_RGBA8:
return format == RGBA_8888 || format == RGBA_4444;
case SOURCE_FORMAT_BGRA8:
return format == BGRA_8888 || format == RGBA_4444;
}
NOTREACHED();
return false;
}
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformColor);
};
} // namespace cc
#endif // CC_RESOURCES_PLATFORM_COLOR_H_
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