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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVis3D module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the QtDataVis3D API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef SURFACE3DRENDERER_P_H
#define SURFACE3DRENDERER_P_H
#include <QtCore/QSize>
#include <QtCore/QObject>
#include <QtGui/QOpenGLFunctions>
#include <QtGui/QFont>
#include <QLinearGradient>
#include <QWindow>
#include "datavis3dglobal_p.h"
#include "surface3dcontroller_p.h"
#include "abstract3drenderer_p.h"
#include "scatterrenderitem_p.h"
class QOpenGLShaderProgram;
QT_DATAVIS3D_BEGIN_NAMESPACE
class ShaderHelper;
class ObjectHelper;
class SurfaceObject;
class TextureHelper;
class Theme;
class Drawer;
class CameraHelper;
class SelectionPointer;
class QT_DATAVIS3D_EXPORT Surface3DRenderer : public Abstract3DRenderer
{
Q_OBJECT
public:
Surface3DController *m_controller;
// Visual parameters
QRect m_boundingRect;
Theme m_cachedTheme;
QDataVis::LabelTransparency m_labelTransparency;
QFont m_font;
bool m_isGridEnabled;
QDataVis::ShadowQuality m_shadowQuality;
private:
// Data parameters
QList<qreal> m_series; // TODO: TEMP
GLint m_segmentYCount;
GLfloat m_segmentYStep;
GLint m_segmentXCount;
GLint m_segmentZCount;
// Internal attributes purely related to how the scene is drawn with GL.
QRect m_mainViewPort;
ShaderHelper *m_shader;
ShaderHelper *m_backgroundShader;
ShaderHelper *m_surfaceShader;
ShaderHelper *m_surfaceGridShader;
ShaderHelper *m_selectionShader;
ShaderHelper *m_labelShader;
GLfloat m_yRange; // m_heightNormalizer
GLfloat m_yAdjustment;
GLfloat m_xLength;
GLfloat m_zLength;
GLfloat m_maxDimension;
GLfloat m_scaleFactor;
GLfloat m_scaleX;
GLfloat m_scaleZ;
GLfloat m_maxSceneSize;
ObjectHelper *m_backgroundObj;
ObjectHelper *m_gridLineObj;
ObjectHelper *m_labelObj;
SurfaceObject *m_surfaceObj;
GLuint m_depthTexture;
GLuint m_depthFrameBuffer;
GLuint m_selectionFrameBuffer;
GLuint m_selectionDepthBuffer;
GLuint m_gradientTexture;
GLuint m_selectionTexture;
GLuint m_selectionResultTexture;
GLfloat m_shadowQualityToShader;
bool m_querySelection;
bool m_cachedSmoothSurface;
bool m_cachedSurfaceGridOn;
SelectionPointer *m_selectionPointer;
bool m_selectionActive;
bool m_xFlipped;
bool m_zFlipped;
bool m_yFlipped;
ScatterRenderItem m_dummyRenderItem; // Let's use scatter for dummy for now
protected:
virtual void loadMeshFile();
public:
explicit Surface3DRenderer(Surface3DController *controller);
~Surface3DRenderer();
void initializeOpenGL();
void render(CameraHelper *camera, const GLuint defaultFboHandle = 0);
// TODO: temp
void setXZStuff(GLint segmentXCount, GLint segmentZCount);
void setSeries(QList<qreal> series);
public slots:
void updateSmoothStatus(bool enable);
void updateSurfaceGridStatus(bool enable);
void updateSurfaceGradient();
void updateSegmentCount(GLint segmentCount, GLfloat step, GLfloat minimum = 0.0f);
virtual void requestSelectionAtPoint(const QPoint &point);
private:
virtual void updateShadowQuality(QDataVis::ShadowQuality quality);
virtual void updateTextures();
virtual void initShaders(const QString &vertexShader, const QString &fragmentShader);
void loadBackgroundMesh();
void loadGridLineMesh();
void loadLabelMesh();
void loadSurfaceObj();
void drawScene(CameraHelper *camera, const GLuint defaultFboHandle);
void handleResize();
void calculateSceneScalingFactors();
void initBackgroundShaders(const QString &vertexShader, const QString &fragmentShader);
void initLabelShaders(const QString &vertexShader, const QString &fragmentShader);
void initSelectionShaders();
void initSurfaceShaders();
void initSelectionBuffer();
void updateSelectionTexture();
void idToRGBA(uint id, uchar *r, uchar *g, uchar *b, uchar *a);
void fillIdCorner(uchar *p, uchar r, uchar g, uchar b, uchar a, int stride);
void surfacePointSelected(qreal value, int column, int row);
void surfacePointCleared();
QVector3D normalize(float x, float y, float z);
#if !defined(QT_OPENGL_ES_2)
void updateDepthBuffer();
#endif
Q_DISABLE_COPY(Surface3DRenderer)
};
QT_DATAVIS3D_END_NAMESPACE
#endif // SURFACE3DRENDERER_P_H
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