KisGLImageWidget.h

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/*
 *  SPDX-FileCopyrightText: 2019 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KISGLIMAGEWIDGET_H
#define KISGLIMAGEWIDGET_H
 
#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QOpenGLTexture>
#include <QOpenGLShaderProgram>
#include <QOpenGLVertexArrayObject>
#include <QOpenGLBuffer>
#include <KisGLImageF16.h>
#include <KisSurfaceColorSpaceWrapper.h>
 
class KisGLImageWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT
public:
    KisGLImageWidget(QWidget *parent = nullptr);
    KisGLImageWidget(const KisSurfaceColorSpaceWrapper &colorSpace,
                     QWidget *parent = nullptr);
 
    ~KisGLImageWidget();
 
    void initializeGL() override;
    void paintGL() override;
 
    void loadImage(const KisGLImageF16 &image);
 
    void paintEvent(QPaintEvent *event) override;
    void resizeEvent(QResizeEvent *event) override;
 
    QSize sizeHint() const override;
 
public Q_SLOTS:
 
private Q_SLOTS:
    void slotOpenGLContextDestroyed();
 
private:
    void updateVerticesBuffer(const QRect &rect);
 
private:
    KisGLImageF16 m_sourceImage;
 
    QScopedPointer<QOpenGLShaderProgram> m_shader;
    QOpenGLVertexArrayObject m_vao;
    QOpenGLBuffer m_verticesBuffer;
    QOpenGLBuffer m_textureVerticesBuffer;
    QOpenGLTexture m_texture;
 
    bool m_havePendingTextureUpdate = false;
};
 
#endif // KISGLIMAGEWIDGET_H