direcs  2012-09-30
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QtGLContext.h
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20 
21 #ifndef GLCONTEXT_H_
22 #define GLCONTEXT_H_
23 
24 #include <QtOpenGL>
25 #include <QString>
26 #include <QtGui/QMouseEvent>
27 
33 class QtGLContext : public QGLWidget
34 {
35  Q_OBJECT
36 
37 
38 public:
40  QtGLContext(QWidget* parent = 0, const QGLWidget* sharedWidget = 0, Qt::WFlags f = 0 );
41  QtGLContext(const QGLFormat &format, QWidget* parent = 0, const QGLWidget* sharedWidget = 0, Qt::WFlags f = 0 );
42  ~QtGLContext();
43 
45  //bool setImage(unsigned char* imgP, const int width, const int height, const int pixeldepth, const bool flipped = false);
46  bool setImage(unsigned char* imgP, const bool flipped = false);
47 
49  void setImageData(const int width, const int height, const int pixeldepth);
50 
52  void setZoomRect(float ulX, float ulY, float lrX, float lrY);
53 
54  //void resetBox() { m_exit.setX(0); m_exit.setY(0); m_entry.setX(0); m_entry.setY(0);}
55 
60  void enableMirrorMode(int state);
61 
62 
63 signals:
64  void boxCreated(int x, int y, int x2, int y2);
65  void saveImage();
66 
67 
68 protected:
69  // standard qt methods
70  virtual void paintGL();
71  virtual void resizeGL(int w, int h);
72  virtual void initializeGL();
73 
74  /*
75  virtual void mousePressEvent(QMouseEvent* event);
76  virtual void mouseMoveEvent(QMouseEvent* event);
77  virtual void mouseReleaseEvent(QMouseEvent* event);
78  */
86  void drawTexture(float ul, float ur, float ll, float lr);
88  unsigned int NextLargerPowerOfTwo(unsigned int n);
89 
90 
91 private:
93  unsigned char* m_imgP;
95  unsigned int m_width, m_height, m_pixeldepth;
97  bool m_flipped;
99  bool m_mirrored;
101  unsigned int m_texWidth;
103  unsigned int m_texHeight;
105  unsigned int m_texNameGL;
107  float m_texUpperLeftX, m_texUpperLeftY, m_texLowerRightX, m_texLowerRightY;
108  // box parameters (for mouse dragging)
109  QPoint m_entry, m_exit;
110  bool m_mousePressed;
111  // "the image" (texture)
112  unsigned char* textureGL;
113 
114 };
115 
116 #endif