/*

 * Copyright (c) 2023, MacDue <macdue@dueutil.tech>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <AK/Math/Constants.h>

#include <AK/Math/Fabs.h>

#include <AK/Math/Radians.h>

#include <AK/Math/Trigonometry.h>

#include <LibGfx/Color.h>

#include <LibGfx/Size.h>

namespace Gfx {

struct ColorStop {

    Color color;

    float position = AK::NaN<float>;

    Optional<float> transition_hint = {};

};

class GradientLine;

inline float normalized_gradient_angle_radians(float gradient_angle)

{

    // Adjust angle so 0 degrees is bottom

    float real_angle = 90 - gradient_angle;

    return AK::to_radians(real_angle);

}

template<typename T>

inline float calculate_gradient_length(Size<T> gradient_size, float sin_angle, float cos_angle)

{

    return AK::fabs(static_cast<float>(gradient_size.height()) * sin_angle) + AK::fabs(static_cast<float>(gradient_size.width()) * cos_angle);

}

Unexecuted instantiation: float Gfx::calculate_gradient_length<int>(Gfx::Size<int>, float, float)

Unexecuted instantiation: float Gfx::calculate_gradient_length<float>(Gfx::Size<float>, float, float)

template<typename T>

inline float calculate_gradient_length(Size<T> gradient_size, float gradient_angle)

{

    float angle = normalized_gradient_angle_radians(gradient_angle);

    float sin_angle, cos_angle;

    AK::sincos(angle, sin_angle, cos_angle);

    return calculate_gradient_length(gradient_size, sin_angle, cos_angle);

}

}