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// Copyright 2017 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 UI_GFX_SKIA_COLOR_SPACE_UTIL_H_
#define UI_GFX_SKIA_COLOR_SPACE_UTIL_H_
#include "third_party/skia/include/core/SkColorSpace.h"
#include "third_party/skia/include/core/SkICC.h"
#include "ui/gfx/color_space_export.h"
namespace gfx {
// Return the parameterized function in |fn|, evaluated at |x|. Note that this
// will clamp output values to the range [0, 1].
float COLOR_SPACE_EXPORT SkTransferFnEval(const SkColorSpaceTransferFn& fn,
float x);
// Return the parameterized function in |fn|, evaluated at |x|. This will not
// clamp output values.
float COLOR_SPACE_EXPORT
SkTransferFnEvalUnclamped(const SkColorSpaceTransferFn& fn, float x);
SkColorSpaceTransferFn COLOR_SPACE_EXPORT
SkTransferFnInverse(const SkColorSpaceTransferFn& fn);
bool COLOR_SPACE_EXPORT
SkTransferFnsApproximatelyCancel(const SkColorSpaceTransferFn& a,
const SkColorSpaceTransferFn& b);
bool COLOR_SPACE_EXPORT
SkTransferFnIsApproximatelyIdentity(const SkColorSpaceTransferFn& fn);
bool COLOR_SPACE_EXPORT SkMatrixIsApproximatelyIdentity(const SkMatrix44& m);
} // namespace gfx
#endif // UI_GFX_SKIA_COLOR_SPACE_UTIL_H_
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