Break up TransactionTest helpers into util directory

    "fakehwc",

    "hwc2",

    "unittests",

    "utils",

    "vsync",

    "waitforvsync",

]

/*

 * Copyright (C) 2019 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#pragma once

#include <ui/ColorSpace.h>

namespace android {

namespace {

struct Color {

    uint8_t r;

    uint8_t g;

    uint8_t b;

    uint8_t a;

    static const Color RED;

    static const Color GREEN;

    static const Color BLUE;

    static const Color WHITE;

    static const Color BLACK;

    static const Color TRANSPARENT;

};

const Color Color::RED{255, 0, 0, 255};

const Color Color::GREEN{0, 255, 0, 255};

const Color Color::BLUE{0, 0, 255, 255};

const Color Color::WHITE{255, 255, 255, 255};

const Color Color::BLACK{0, 0, 0, 255};

const Color Color::TRANSPARENT{0, 0, 0, 0};

class ColorTransformHelper {

public:

    static void DegammaColorSingle(half& s) {

        if (s <= 0.03928f)

            s = s / 12.92f;

        else

            s = pow((s + 0.055f) / 1.055f, 2.4f);

    }

    static void DegammaColor(half3& color) {

        DegammaColorSingle(color.r);

        DegammaColorSingle(color.g);

        DegammaColorSingle(color.b);

    }

    static void GammaColorSingle(half& s) {

        if (s <= 0.0031308f) {

            s = s * 12.92f;

        } else {

            s = 1.055f * pow(s, (1.0f / 2.4f)) - 0.055f;

        }

    }

    static void GammaColor(half3& color) {

        GammaColorSingle(color.r);

        GammaColorSingle(color.g);

        GammaColorSingle(color.b);

    }

    static void applyMatrix(half3& color, const mat3& mat) {

        half3 ret = half3(0);

        for (int i = 0; i < 3; i++) {

            for (int j = 0; j < 3; j++) {

                ret[i] = ret[i] + color[j] * mat[j][i];

            }

        }

        color = ret;

    }

};

} // namespace

} // namespace android