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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERPOLATION_SPACE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERPOLATION_SPACE_H_
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/skia/include/core/SkRefCnt.h"
namespace cc {
class ColorFilter;
}
namespace blink {
enum InterpolationSpace {
// Interpolation is performed on (assumed to be sRGB) pixel values directly,
// so a halfway interpolation of 0 and 255 is 127.
kInterpolationSpaceSRGB,
// Interpolation is performed in linear physical value space, so a halfway
// interpolation of 0 and 255 is 188.
kInterpolationSpaceLinear
};
namespace interpolation_space_utilities {
// Convert a Color assumed to be in the |src_interpolation_space| into the
// |dst_interpolation_space|.
Color ConvertColor(
const Color& src_color,
InterpolationSpace dst_interpolation_space,
InterpolationSpace src_interpolation_space = kInterpolationSpaceSRGB);
// Create a color filter that will convert from |src_interpolation_space| into
// |dst_interpolation_space|.
sk_sp<cc::ColorFilter> CreateInterpolationSpaceFilter(
InterpolationSpace src_interpolation_space,
InterpolationSpace dst_interpolation_space);
} // namespace interpolation_space_utilities
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_INTERPOLATION_SPACE_H_
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