Developer Documentation
QtBaseViewer_qt.cc
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41 
42 
43 
44 
45 // QOpenGL headers and glew are in conflict,
46 // so implement functions that make use of QOpenGL classes in separate file
47 
48 
49 //=============================================================================
50 //
51 // CLASS glViewer - IMPLEMENTATION
52 //
53 //=============================================================================
54 
55 
56 //== INCLUDES =================================================================
57 
58 #include "QtBaseViewer.hh"
59 
61 #include <QOffscreenSurface>
62 
63 #include <QOpenGLContext>
64 #include <QOpenGLDebugLogger>
65 
66 
67 #include <QOpenGLWidget>
68 #include <QOpenGLFramebufferObject>
69 
70 //== NAMESPACES ===============================================================
71 
72 
73 
74 //== IMPLEMENTATION ==========================================================
75 
76 
77 
79 
80  glWidget_->context()->swapBuffers(glWidget_->context()->surface());
81 
82 }
83 
84 //-----------------------------------------------------------------------------
85 
86 void glViewer::startGLDebugLogger()
87 {
88 
89  if (OpenFlipper::Options::debug())
90  {
91  delete glDebugLogger_;
92  glDebugLogger_ = new QOpenGLDebugLogger(this);
93  if (glDebugLogger_->initialize())
94  {
95  connect(glDebugLogger_, SIGNAL(messageLogged(QOpenGLDebugMessage)), this, SLOT(processGLDebugMessage(QOpenGLDebugMessage)));
96  glDebugLogger_->startLogging(QOpenGLDebugLogger::SynchronousLogging);
97  }
98  }
99 
100 }
101 
102 //-----------------------------------------------------------------------------
103 
104 void glViewer::deleteGLDebugLogger()
105 {
106  makeCurrent();
107  delete glDebugLogger_;
108 }
109 
110 //-----------------------------------------------------------------------------
111 
112 void glViewer::processGLDebugMessage(const QOpenGLDebugMessage& msg)
113 {
114  if (msg.severity() & QOpenGLDebugMessage::HighSeverity)
115  std::cerr << msg.message().toStdString() << std::endl;
116 
117  // also catch deprecated function calls in core profile
118  else if (!glstate_->compatibilityProfile() && msg.type() == QOpenGLDebugMessage::DeprecatedBehaviorType)
119  std::cerr << msg.message().toStdString() << std::endl;
120 }
121 
122 
123 //-----------------------------------------------------------------------------
124 
125 void
126 glViewer::copyToImage( QImage& _image,
127  unsigned int _l, unsigned int _t,
128  unsigned int _w, unsigned int _h,
129  GLenum /* _buffer */ )
130 {
131 
132  _image = glWidget_->grabFramebuffer().copy(_l, _t, _w, _h).convertToFormat(QImage::Format_RGB32);
133 }
134 
135 //-----------------------------------------------------------------------------
136 
137 void glViewer::makeWidgetCurrent()
138 {
139  glWidget_->makeCurrent();
140 }
141 
142 //-----------------------------------------------------------------------------
143 
144 bool glViewer::createQFBO(QOpenGLFramebufferObject*& ptr, GLuint* _handle, int _width, int _height, int* _samples)
145 {
147  format.setInternalTextureFormat(GL_RGBA);
148  format.setTextureTarget(GL_TEXTURE_2D);
149  if(*_samples > -1) //use -1 to indicate, that sample count is bit set
150  {
151  // set the attachments as in the standard rendering
152  format.setAttachment(QFramebufferObject::CombinedDepthStencil);
153  // 16 samples per pixel as we want a nice snapshot. If this is not supported
154  // it will fall back to the maximal supported number of samples
155  format.setSamples(*_samples);
156  }
157 
158  QFramebufferObject* fb;
159  fb = new QFramebufferObject(_width, _height, format);
160  ptr = fb;
161  if(fb->isValid())
162  {
163  *_handle = fb->handle();
164  *_samples = fb->format().samples(); // store the actual samples qt uses
165  return true;
166  }
167  else
168  {
169  *_handle = 0;
170  return false;
171  }
172 }
173 
174 //-----------------------------------------------------------------------------
175 
176 void glViewer::blitQFBO(QOpenGLFramebufferObject* _ptr1, const QRect& _size1, QOpenGLFramebufferObject* _ptr2, const QRect& _size2)
177 {
178  QFramebufferObject::blitFramebuffer(_ptr1, _size1, _ptr2, _size2);
179 }
180 
181 //-----------------------------------------------------------------------------
182 
183 bool glViewer::bindQFBO(QOpenGLFramebufferObject* _ptr)
184 {
185  return _ptr->bind();
186 }
187 
188 //-----------------------------------------------------------------------------
189 
190 bool glViewer::QFBOResized(QOpenGLFramebufferObject* _ptr1)
191 {
192  return _ptr1->size() != QSize(glWidth(), glHeight());
193 }
194 
195 //-----------------------------------------------------------------------------
196 
197 void glViewer::deleteQFBO(QOpenGLFramebufferObject* _ptr)
198 {
199  delete _ptr;
200 }
201 
202 //=============================================================================
203 //=============================================================================
204 
unsigned int glWidth() const
get width of QGLWidget
void copyToImage(QImage &_image, GLenum _buffer=GL_BACK)
copy current framebuffer to an QImage
virtual void makeCurrent()
Makes this widget the current widget for OpenGL operations.
unsigned int glHeight() const
get height of QGLWidget
void processGLDebugMessage(const QOpenGLDebugMessage &msg)
process opengl debug messages
QOpenGLFramebufferObjectFormat QFramebufferObjectFormat
Framebuffer object that holds the pick cache.
virtual void swapBuffers()
Swaps the screen contents with the off-screen buffer.
QOpenGLFramebufferObject QFramebufferObject
Framebuffer object that holds the pick cache.
ACG::GLState * glstate_
Gl State.