contrastshader.h

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/*
    SPDX-FileCopyrightText: 2010 Fredrik Höglund <fredrik@kde.org>
    SPDX-FileCopyrightText: 2014 Marco Martin <mart@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#pragma once
 
#include "opengl/glutils.h"
 
class QMatrix4x4;
 
namespace KWin
{
 
class ContrastShader
{
public:
    ContrastShader();
 
    void init();
    void setColorMatrix(const QMatrix4x4 &matrix);
    void setTextureMatrix(const QMatrix4x4 &matrix);
    void setModelViewProjectionMatrix(const QMatrix4x4 &matrix);
    void setOpacity(float opacity);
 
    float opacity() const;
    bool isValid() const;
 
    void bind();
    void unbind();
 
protected:
    void setIsValid(bool value);
    void reset();
 
private:
    bool m_valid;
    std::unique_ptr<GLShader> m_shader;
    int m_mvpMatrixLocation;
    int m_textureMatrixLocation;
    int m_colorMatrixLocation;
    int m_opacityLocation;
    float m_opacity;
};
 
} // namespace KWin