volumeeffect_p.h

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#ifndef VolumeSHADERPROGRAM_P_H
#define VolumeSHADERPROGRAM_P_H

#include <QtCore/qsharedpointer.h>
#include <QtCore/qpointer.h>
#include <QOpenGLShaderProgram>

#include "qquickeffect.h"
#include "qglshaderprogrameffect.h"

QT_BEGIN_NAMESPACE

class VolumeShaderProgram;
class VolumeShaderProgramEffect;

class VolumeShaderProgramPropertyListener : public QObject
{
    Q_OBJECT
public:
    VolumeShaderProgramPropertyListener(QObject* parent = 0)
        : QObject(parent)
    {
    }
    virtual ~VolumeShaderProgramPropertyListener()
    {
    }
Q_SIGNALS:
    void propertyChanged();
};

class VolumeShaderProgramPropertyListenerEx : public VolumeShaderProgramPropertyListener
{
public:
    VolumeShaderProgramPropertyListenerEx(VolumeShaderProgram* parent, VolumeShaderProgramEffect* effect);
    ~VolumeShaderProgramPropertyListenerEx();

protected:
    virtual int qt_metacall(QMetaObject::Call c, int id, void **a);
    VolumeShaderProgramEffect* effect;
private:
    int VolumeshaderProgramMethodCount;
};


class VolumeShaderProgramEffect : public QGLShaderProgramEffect
{
public:
    VolumeShaderProgramEffect(VolumeShaderProgram* parent);
    virtual ~VolumeShaderProgramEffect();

    bool create(const QString& vertexShader, const QString& fragmentShader);

    void update(QGLPainter *painter, QGLPainter::Updates updates);
    bool setUniformForPropertyIndex(int propertyIndex, QGLPainter *painter);

    void setPropertiesDirty();
    void setPropertyDirty(int property);

    void setAttributeFields(QGL::VertexAttribute fields);
protected:
    void processTextureUrl(int uniformLocation, QString urlString);
    void afterLink();
    bool beforeLink();

private:
    void setUniform(int uniformValue, const QImage& image,
                             QGLPainter* painter);
    void setUniform(int uniformValue, const QPixmap pixmap,
                             QGLPainter* painter);
    QGLTexture2D* textureForUniformValue(int uniformLocation);
    int textureUnitForUniformValue(int uniformLocation);

    QPointer<VolumeShaderProgram> parent;
    int nextTextureUnit;
    QMap<int, int> propertyIdsToUniformLocations;
    QMap<int, int> uniformLocationsToTextureUnits;
    QList<int> dirtyProperties;
    QArray<int> propertiesWithoutNotificationSignal;
    VolumeShaderProgramPropertyListener* propertyListener;

    // Thes maps are all referenced by uniform location
    QMap<int, QGLTexture2D*> texture2Ds;
    QMap<int, QImage> images;
    QMap<int, QString> urls;

    // These are sets of uniform locations
    QSet<int> loadingTextures;
    QSet<int> changedTextures;

    int m_texture3DuniformValue;
    int m_eyePositionUniformLocation;
};

QT_END_NAMESPACE

#endif // VolumeSHADERPROGRAM_P_H