ocio_display_filter_vfx2020.h

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/*
 *  SPDX-FileCopyrightText: 2012 Boudewijn Rempt <boud@valdyas.org>
 *  SPDX-FileCopyrightText: 2021 L. E. Segovia <amy@amyspark.me>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef OCIO_DISPLAY_FILTER_H
#define OCIO_DISPLAY_FILTER_H
 
#include <QOpenGLShaderProgram>
 
#include <OpenColorIO.h>
#include <OpenColorTransforms.h>
#include <OpenColorTypes.h>
 
#include <kis_display_filter.h>
#include <kis_exposure_gamma_correction_interface.h>
 
namespace OCIO = OCIO_NAMESPACE;
 
enum OCIO_CHANNEL_SWIZZLE {
    LUMINANCE,
    RGBA,
    R,
    G,
    B,
    A
};
 
class OcioDisplayFilter : public KisDisplayFilter
{
    Q_OBJECT
public:
    explicit OcioDisplayFilter(KisExposureGammaCorrectionInterface *interface, QObject *parent = 0);
    ~OcioDisplayFilter();
 
    void filter(quint8 *pixels, quint32 numPixels) override;
    void approximateInverseTransformation(quint8 *pixels, quint32 numPixels) override;
    void approximateForwardTransformation(quint8 *pixels, quint32 numPixels) override;
    bool useInternalColorManagement() const override;
    bool lockCurrentColorVisualRepresentation() const override;
    void setLockCurrentColorVisualRepresentation(bool value);
 
    bool updateShader() override;
    template <class F>
    bool updateShaderImpl(F *f);
 
    void setupTextures(GLFunctions *f, QOpenGLShaderProgram *program) const override;
 
    KisExposureGammaCorrectionInterface *correctionInterface() const override;
 
    virtual QString program() const override;
 
    void updateProcessor();
 
    OCIO::ConstConfigRcPtr config;
 
    const char *inputColorSpaceName {nullptr};
    const char *displayDevice {nullptr};
    const char *view {nullptr};
    const char *look {nullptr};
    OCIO_CHANNEL_SWIZZLE swizzle {RGBA};
    float exposure {0.0};
    float gamma {0.0};
    float blackPoint {0.0};
    float whitePoint {0.0};
    bool forceInternalColorManagement {false};
 
private:
 
    OCIO::ConstProcessorRcPtr m_processor;
    OCIO::ConstProcessorRcPtr m_reverseApproximationProcessor;
    OCIO::ConstProcessorRcPtr m_forwardApproximationProcessor;
 
    KisExposureGammaCorrectionInterface *m_interface {nullptr};
 
    bool m_lockCurrentColorVisualRepresentation {false};
 
    QString m_program;
    GLuint m_lut3dTexID {0};
    QVector<float> m_lut3d;
    QString m_lut3dcacheid;
    QString m_shadercacheid;
 
    bool m_shaderDirty {true};
};
 
#endif // OCIO_DISPLAY_FILTER_H