void CQTOpenGLMainWindow::CreateOpenGLWidget(TConfigurationNode& t_tree) {
/* Create user functions */
m_pcUserFunctions = CreateUserFunctions(t_tree);
/* Set up OpenGL features */
QGLFormat cGLFormat = QGLFormat::defaultFormat();
cGLFormat.setSampleBuffers(m_pcToggleAntiAliasingAction->isChecked());
cGLFormat.setStencil(false);
QGLFormat::setDefaultFormat(cGLFormat);
/* Create the widget */
QWidget* pcPlaceHolder = new QWidget(this);
m_pcOpenGLWidget = new CQTOpenGLWidget(pcPlaceHolder, *m_pcUserFunctions);
m_pcOpenGLWidget->setCursor(QCursor(Qt::OpenHandCursor));
m_pcOpenGLWidget->GetCamera().Init(t_tree);
m_pcOpenGLWidget->GetFrameGrabData().Init(t_tree);
m_pcToggleAntiAliasingAction->setChecked(cGLFormat.sampleBuffers());
/* Invert mouse controls? */
bool bInvertMouse;
GetNodeAttributeOrDefault(t_tree, "invert_mouse", bInvertMouse, false);
m_pcOpenGLWidget->SetInvertMouse(bInvertMouse);
/* Set the window as the central widget */
CQTOpenGLLayout* pcQTOpenGLLayout = new CQTOpenGLLayout();
pcQTOpenGLLayout->addWidget(m_pcOpenGLWidget);
pcPlaceHolder->setLayout(pcQTOpenGLLayout);
setCentralWidget(pcPlaceHolder);
}
/*!
\since 4.8
Returns a platform window format for the OpenGL format specified by \a format.
*/
QPlatformWindowFormat QGLFormat::toPlatformWindowFormat(const QGLFormat &format)
{
QPlatformWindowFormat retFormat;
retFormat.setAccum(format.accum());
if (format.accumBufferSize() >= 0)
retFormat.setAccumBufferSize(format.accumBufferSize());
retFormat.setAlpha(format.alpha());
if (format.alphaBufferSize() >= 0)
retFormat.setAlphaBufferSize(format.alphaBufferSize());
if (format.blueBufferSize() >= 0)
retFormat.setBlueBufferSize(format.blueBufferSize());
retFormat.setDepth(format.depth());
if (format.depthBufferSize() >= 0)
retFormat.setDepthBufferSize(format.depthBufferSize());
retFormat.setDirectRendering(format.directRendering());
retFormat.setDoubleBuffer(format.doubleBuffer());
if (format.greenBufferSize() >= 0)
retFormat.setGreenBufferSize(format.greenBufferSize());
if (format.redBufferSize() >= 0)
retFormat.setRedBufferSize(format.redBufferSize());
retFormat.setRgba(format.rgba());
retFormat.setSampleBuffers(format.sampleBuffers());
if (format.samples() >= 0)
retFormat.setSamples(format.samples());
retFormat.setStencil(format.stencil());
if (format.stencilBufferSize() >= 0)
retFormat.setStencilBufferSize(format.stencilBufferSize());
retFormat.setStereo(format.stereo());
retFormat.setSwapInterval(format.swapInterval());
return retFormat;
}
GLFormat::GLFormat(const QGLFormat & format)
: m_majorVersion(format.majorVersion())
, m_minorVersion(format.minorVersion())
, m_redBufferSize (format.redBufferSize())
, m_greenBufferSize(format.greenBufferSize())
, m_blueBufferSize (format.blueBufferSize())
, m_alphaBufferSize(format.alpha() ? format.alphaBufferSize() : 0)
, m_depthBufferSize (format.depth() ? format.depthBufferSize() : 0)
, m_stencilBufferSize(format.stencil() ? format.stencilBufferSize() : 0)
, m_doubleBuffer(format.doubleBuffer())
, m_stereo(format.stereo())
, m_sampleBuffers(format.sampleBuffers())
, m_samples(format.samples())
, m_swapInterval(format.swapInterval())
{
switch(format.profile())
{
default:
case QGLFormat::NoProfile:
m_profile = NoProfile;
break;
case QGLFormat::CoreProfile:
m_profile = CoreProfile;
break;
case QGLFormat::CompatibilityProfile:
m_profile = CompatibilityProfile;
break;
};
}
QT_BEGIN_NAMESPACE
void qt_eglproperties_set_glformat(QEglProperties& eglProperties, const QGLFormat& glFormat)
{
int redSize = glFormat.redBufferSize();
int greenSize = glFormat.greenBufferSize();
int blueSize = glFormat.blueBufferSize();
int alphaSize = glFormat.alphaBufferSize();
int depthSize = glFormat.depthBufferSize();
int stencilSize = glFormat.stencilBufferSize();
int sampleCount = glFormat.samples();
// QGLFormat uses a magic value of -1 to indicate "don't care", even when a buffer of that
// type has been requested. So we must check QGLFormat's booleans too if size is -1:
if (glFormat.alpha() && alphaSize <= 0)
alphaSize = 1;
if (glFormat.depth() && depthSize <= 0)
depthSize = 1;
if (glFormat.stencil() && stencilSize <= 0)
stencilSize = 1;
if (glFormat.sampleBuffers() && sampleCount <= 0)
sampleCount = 1;
// We want to make sure 16-bit configs are chosen over 32-bit configs as they will provide
// the best performance. The EGL config selection algorithm is a bit stange in this regard:
// The selection criteria for EGL_BUFFER_SIZE is "AtLeast", so we can't use it to discard
// 32-bit configs completely from the selection. So it then comes to the sorting algorithm.
// The red/green/blue sizes have a sort priority of 3, so they are sorted by first. The sort
// order is special and described as "by larger _total_ number of color bits.". So EGL will
// put 32-bit configs in the list before the 16-bit configs. However, the spec also goes on
// to say "If the requested number of bits in attrib_list for a particular component is 0,
// then the number of bits for that component is not considered". This part of the spec also
// seems to imply that setting the red/green/blue bits to zero means none of the components
// are considered and EGL disregards the entire sorting rule. It then looks to the next
// highest priority rule, which is EGL_BUFFER_SIZE. Despite the selection criteria being
// "AtLeast" for EGL_BUFFER_SIZE, it's sort order is "smaller" meaning 16-bit configs are
// put in the list before 32-bit configs. So, to make sure 16-bit is preffered over 32-bit,
// we must set the red/green/blue sizes to zero. This has an unfortunate consequence that
// if the application sets the red/green/blue size to 5/6/5 on the QGLFormat, they will
// probably get a 32-bit config, even when there's an RGB565 config avaliable. Oh well.
// Now normalize the values so -1 becomes 0
redSize = redSize > 0 ? redSize : 0;
greenSize = greenSize > 0 ? greenSize : 0;
blueSize = blueSize > 0 ? blueSize : 0;
alphaSize = alphaSize > 0 ? alphaSize : 0;
depthSize = depthSize > 0 ? depthSize : 0;
stencilSize = stencilSize > 0 ? stencilSize : 0;
sampleCount = sampleCount > 0 ? sampleCount : 0;
eglProperties.setValue(EGL_RED_SIZE, redSize);
eglProperties.setValue(EGL_GREEN_SIZE, greenSize);
eglProperties.setValue(EGL_BLUE_SIZE, blueSize);
eglProperties.setValue(EGL_ALPHA_SIZE, alphaSize);
eglProperties.setValue(EGL_DEPTH_SIZE, depthSize);
eglProperties.setValue(EGL_STENCIL_SIZE, stencilSize);
eglProperties.setValue(EGL_SAMPLES, sampleCount);
eglProperties.setValue(EGL_SAMPLE_BUFFERS, sampleCount ? 1 : 0);
}
void Viewer::initializeGL() {
// Do some OpenGL setup
QGLFormat glFormat = QGLWidget::format();
if (!glFormat.sampleBuffers()) {
std::cerr << "Could not enable sample buffers." << std::endl;
return;
}
GLuint VertexArrayID;
glGenVertexArrays(1, &VertexArrayID);
glBindVertexArray(VertexArrayID);
glClearColor(0.7, 0.7, 0.7, 0.0);
int programID = LoadShaders("/Users/Aliya/SPH/shader.vert", "/Users/Aliya/SPH/shader.frag");
glUseProgram(programID);
static const GLfloat g_vertex_buffer_data[] = {
-0.01f, -0.01f, 0.01f,
0.01f, -0.01f, 0.01f,
0.0f, 0.01f, 0.01f,
};
// This will identify our vertex buffer
float data[123];
double radius = 0.04f;
for(size_t i=0; i<40; ++i) {
data[i*3] = radius * cos(i*2*3.14f/40);
data[i*3 + 1] = radius * sin(i*2*3.14f/40);
data[i*3 + 2] = 0.0;
}
data[120] = 0.0f;
data[121] = 0.0f;
data[122] = 0.0f;
// Generate 1 buffer, put the resulting identifier in vertexbuffer
glGenBuffers(1, &vertexbuffer);
// The following commands will talk about our 'vertexbuffer' buffer
glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
// Give our vertices to OpenGL.
glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW);
// The VBO containing the positions and sizes of the particles
glGenBuffers(1, &particles_position_buffer);
glBindBuffer(GL_ARRAY_BUFFER, particles_position_buffer);
// Initialize with empty (NULL) buffer : it will be updated later, each frame.
glBufferData(GL_ARRAY_BUFFER, MaxParticles * 4 * sizeof(GLfloat), NULL, GL_STREAM_DRAW);
mvpMatrix = glGetUniformLocation(programID, "mvpMatrix");
// The VBO containing the positions and sizes of the particles
glGenBuffers(2, &particles_color_buffer);
glBindBuffer(GL_ARRAY_BUFFER, particles_color_buffer);
// Initialize with empty (NULL) buffer : it will be updated later, each frame.
glBufferData(GL_ARRAY_BUFFER, MaxParticles * 4 * sizeof(GLfloat), NULL, GL_STREAM_DRAW);
}
inline void GL3DShaderWidget::checkOpenGLPixelFormat(const QGLFormat &fmt)
{
QGLFormat lRealFormat = format();
if(fmt.depth() && !lRealFormat.depth()) printf("OpenGL Buffer Warning: depth buffer requested but NOT granted.\n");
if(fmt.alpha() && !lRealFormat.alpha()) printf("OpenGL Buffer Warning: alpha buffer requested but not granted.\n");
if(!fmt.doubleBuffer() && lRealFormat.doubleBuffer()) printf("OpenGL Buffer Warning: single buffer requested but NOT granted.\n");
if(fmt.doubleBuffer() && !lRealFormat.doubleBuffer()) printf("OpenGL Buffer Warning: double buffer requested but NOT granted.\n");
if(fmt.stereo() && !lRealFormat.stereo()) printf("OpenGL Buffer Warning: stereo buffer requested but NOT granted.\n");
if(!fmt.rgba() && lRealFormat.rgba()) printf("OpenGL Buffer Warning: indexed color mode requested but NOT granted.\n");
if(fmt.rgba() && !lRealFormat.rgba()) printf("OpenGL Buffer Warning: RGBA color mode requested but NOT granted.\n");
if(fmt.sampleBuffers() && !lRealFormat.sampleBuffers()) printf("OpenGL Buffer Warning: multisample buffers requested but NOT granted.\n");
if(fmt.accum() && !lRealFormat.accum()) printf("OpenGL Buffer Warning: accumulation buffer requested but not granted.\n");
if(fmt.stencil() && !lRealFormat.stencil()) printf("OpenGL Buffer Warning: stencil buffer requested but not granted.\n");
fflush(stdout);
}
void GLWidget::initializeGL()
{
// get context opengl-version
qDebug() << "Widget OpenGl: " << format().majorVersion() << "." << format().minorVersion();
qDebug() << "Context valid: " << context()->isValid();
qDebug() << "Really used OpenGl: " << context()->format().majorVersion() << "." << context()->format().minorVersion();
qDebug() << "OpenGl information: VENDOR: " << (const char*)glGetString(GL_VENDOR);
qDebug() << " RENDERDER: " << (const char*)glGetString(GL_RENDERER);
qDebug() << " VERSION: " << (const char*)glGetString(GL_VERSION);
qDebug() << " GLSL VERSION: " << (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
QGLFormat glFormat = QGLWidget::format();
if ( !glFormat.sampleBuffers() )
qWarning() << "Could not enable sample buffers";
// Set the clear color to black
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
// Prepare a complete shader program...
if ( !prepareShaderProgram( ":/simple.vert", ":/simple.frag" ) )
return;
// we need a VAO in core!
GLuint VAO;
PglGenVertexArrays glGenVertexArrays = (PglGenVertexArrays) context()->getProcAddress("glGenVertexArrays");
PglBindVertexArray glBindVertexArray = (PglBindVertexArray) context()->getProcAddress("glBindVertexArray");
glGenVertexArrays(1, &VAO);
glBindVertexArray(VAO);
// We need us some vertex data. Start simple with a triangle ;-)
float points[] = { -0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.0f, 1.0f,
0.0f, 0.5f, 0.0f, 1.0f };
m_vertexBuffer.create();
m_vertexBuffer.setUsagePattern( QOpenGLBuffer::StaticDraw );
if ( !m_vertexBuffer.bind() )
{
qWarning() << "Could not bind vertex buffer to the context";
return;
}
m_vertexBuffer.allocate( points, 3 * 4 * sizeof( float ) );
// Bind the shader program so that we can associate variables from
// our application to the shaders
if ( !m_shader.bind() )
{
qWarning() << "Could not bind shader program to context";
return;
}
// Enable the "vertex" attribute to bind it to our currently bound
// vertex buffer.
m_shader.setAttributeBuffer( "vertex", GL_FLOAT, 0, 4 );
m_shader.enableAttributeArray( "vertex" );
}
static void qt_format_to_attrib_list(const QGLFormat &f, int attribs[])
{
int i = 0;
attribs[i++] = GLX_RENDER_TYPE;
attribs[i++] = GLX_RGBA_BIT;
attribs[i++] = GLX_DRAWABLE_TYPE;
attribs[i++] = GLX_PBUFFER_BIT;
attribs[i++] = GLX_RED_SIZE;
attribs[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize();
attribs[i++] = GLX_GREEN_SIZE;
attribs[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize();
attribs[i++] = GLX_BLUE_SIZE;
attribs[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize();
if (f.doubleBuffer()) {
attribs[i++] = GLX_DOUBLEBUFFER;
attribs[i++] = true;
}
if (f.depth()) {
attribs[i++] = GLX_DEPTH_SIZE;
attribs[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize();
}
if (f.stereo()) {
attribs[i++] = GLX_STEREO;
attribs[i++] = true;
}
if (f.stencil()) {
attribs[i++] = GLX_STENCIL_SIZE;
attribs[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize();
}
if (f.alpha()) {
attribs[i++] = GLX_ALPHA_SIZE;
attribs[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize();
}
if (f.accum()) {
attribs[i++] = GLX_ACCUM_RED_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
attribs[i++] = GLX_ACCUM_GREEN_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
attribs[i++] = GLX_ACCUM_BLUE_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
if (f.alpha()) {
attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
}
}
if (f.sampleBuffers()) {
attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
attribs[i++] = 1;
attribs[i++] = GLX_SAMPLES_ARB;
attribs[i++] = f.samples() == -1 ? 4 : f.samples();
}
attribs[i] = XNone;
}
void GLWidget::initializeGL()
{
QGLFormat glFormat = QGLWidget::format();
if ( !glFormat.sampleBuffers() )
qWarning() << "Could not enable sample buffers";
// Set the clear color to black
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
// Prepare a complete shader program…
if ( !prepareShaderProgram( ":/simple.vert", ":/simple.frag" ) )
return;
// We need us some vertex data. Start simple with a triangle ;-)
float points[] = {-0.5f, -0.5f, 0.0f, 1.0f,
0.5f, -0.5f, 0.0f, 1.0f,
0.0f, 0.5f, 0.0f, 1.0f};
m_vertexBuffer.create();
m_vertexBuffer.setUsagePattern( QGLBuffer::StaticDraw );
if ( !m_vertexBuffer.bind() )
{
qWarning() << "Could not bind vertex buffer to the context";
return;
}
m_vertexBuffer.allocate( points, 3 * 4 * sizeof( float ) );
// Bind the shader program so that we can associate variables from
// our application to the shaders
if ( !m_shader.bind() )
{
qWarning() << "Could not bind shader program to context";
return;
}
// Enable the "vertex" attribute to bind it to our currently bound
// vertex buffer.
m_shader.setAttributeBuffer( "vertex", GL_FLOAT, 0, 4 );
m_shader.enableAttributeArray( "vertex" );
/*glfuncs = m_context->versionFunctions();
if (!glfuncs) {
qDebug()<<"Не поддерживается версия OpenGL этой программой.";
exit(1); //Хъюстон, у нас проблема номер раз
}
glfuncs->initializeOpenGLFunctions();
uint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);//*/
qDebug() << QString((const char*)glGetString(GL_VERSION)) << "\n" << QString((const char*)glGetString(GL_VENDOR))<< "\n" << QString((const char*)glGetString(GL_RENDERER));//<< "\n" << glGetString(GL_EXTENTIONS);
}
void GraphicsWindowQt::qglFormat2traits( const QGLFormat& format, osg::GraphicsContext::Traits* traits )
{
traits->red = format.redBufferSize();
traits->green = format.greenBufferSize();
traits->blue = format.blueBufferSize();
traits->alpha = format.alpha() ? format.alphaBufferSize() : 0;
traits->depth = format.depth() ? format.depthBufferSize() : 0;
traits->stencil = format.stencil() ? format.stencilBufferSize() : 0;
traits->sampleBuffers = format.sampleBuffers() ? 1 : 0;
traits->samples = format.samples();
traits->quadBufferStereo = format.stereo();
traits->doubleBuffer = format.doubleBuffer();
traits->vsync = format.swapInterval() >= 1;
}
string glinfo::
pretty_format(const QGLFormat& f)
{
QGLFormat::OpenGLVersionFlags flag = f.openGLVersionFlags();
stringstream s;
s << "accum=" << f.accum() << endl
<< "accumBufferSize=" << f.accumBufferSize() << endl
<< "alpha=" << f.alpha() << endl
<< "alphaBufferSize=" << f.alphaBufferSize() << endl
<< "blueBufferSize=" << f.blueBufferSize() << endl
<< "depth=" << f.depth() << endl
<< "depthBufferSize=" << f.depthBufferSize() << endl
<< "directRendering=" << f.directRendering() << endl
<< "doubleBuffer=" << f.doubleBuffer() << endl
<< "greenBufferSize=" << f.greenBufferSize() << endl
<< "hasOverlay=" << f.hasOverlay() << endl
<< "redBufferSize=" << f.redBufferSize() << endl
<< "rgba=" << f.rgba() << endl
<< "sampleBuffers=" << f.sampleBuffers() << endl
<< "samples=" << f.samples() << endl
<< "stencil=" << f.stencil() << endl
<< "stencilBufferSize=" << f.stencilBufferSize() << endl
<< "stereo=" << f.stereo() << endl
<< "swapInterval=" << f.swapInterval() << endl
<< "" << endl
<< "hasOpenGL=" << f.hasOpenGL() << endl
<< "hasOpenGLOverlays=" << f.hasOpenGLOverlays() << endl
<< "OpenGL_Version_None=" << (QGLFormat::OpenGL_Version_None == flag) << endl
<< "OpenGL_Version_1_1=" << (QGLFormat::OpenGL_Version_1_1 & flag) << endl
<< "OpenGL_Version_1_2=" << (QGLFormat::OpenGL_Version_1_2 & flag) << endl
<< "OpenGL_Version_1_3=" << (QGLFormat::OpenGL_Version_1_3 & flag) << endl
<< "OpenGL_Version_1_4=" << (QGLFormat::OpenGL_Version_1_4 & flag) << endl
<< "OpenGL_Version_1_5=" << (QGLFormat::OpenGL_Version_1_5 & flag) << endl
<< "OpenGL_Version_2_0=" << (QGLFormat::OpenGL_Version_2_0 & flag) << endl
<< "OpenGL_Version_2_1=" << (QGLFormat::OpenGL_Version_2_1 & flag) << endl
<< "OpenGL_Version_3_0=" << (QGLFormat::OpenGL_Version_3_0 & flag) << endl
<< "OpenGL_ES_CommonLite_Version_1_0=" << (QGLFormat::OpenGL_ES_CommonLite_Version_1_0 & flag) << endl
<< "OpenGL_ES_Common_Version_1_0=" << (QGLFormat::OpenGL_ES_Common_Version_1_0 & flag) << endl
<< "OpenGL_ES_CommonLite_Version_1_1=" << (QGLFormat::OpenGL_ES_CommonLite_Version_1_1 & flag) << endl
<< "OpenGL_ES_Common_Version_1_1=" << (QGLFormat::OpenGL_ES_Common_Version_1_1 & flag) << endl
<< "OpenGL_ES_Version_2_0=" << (QGLFormat::OpenGL_ES_Version_2_0 & flag) << endl;
return s.str();
}
FLGLWidget::FLGLWidget(const QGLFormat& format, QWidget * parent) :
QGLWidget(format, parent),
m_vertexBuffer( QGLBuffer::VertexBuffer )
{
QGLFormat glFormat = QGLWidget::format();
qDebug() << QString( "OpenGL Version = %1, %2" )
.arg( glFormat.majorVersion() )
.arg( glFormat.minorVersion() );
if ( !glFormat.sampleBuffers() )
qWarning() << "Could not enable sample buffers";
qDebug() << "OpenGL context valid =" << context()->isValid();
logo = 0;
xRot = 0;
yRot = 0;
zRot = 0;
}
void Viewer::initializeGL() {
// Do some OpenGL setup
QGLFormat glFormat = QGLWidget::format();
if (!glFormat.sampleBuffers()) {
std::cerr << "Could not enable sample buffers." << std::endl;
return;
}
glClearColor(0.7, 0.7, 0.7, 0.0);
if (!mProgram.addShaderFromSourceFile(QGLShader::Vertex, "shader.vert")) {
std::cerr << "Cannot load vertex shader." << std::endl;
return;
}
if (!mProgram.addShaderFromSourceFile(QGLShader::Fragment, "shader.frag")) {
std::cerr << "Cannot load fragment shader." << std::endl;
return;
}
if (!mProgram.link()) {
std::cerr << "Cannot link shaders." << std::endl;
return;
}
mVertexArrayObject.create();
mVertexArrayObject.bind();
mVertexBufferObject.create();
mVertexBufferObject.setUsagePattern(QOpenGLBuffer::StaticDraw);
if (!mVertexBufferObject.bind()) {
std::cerr << "could not bind vertex buffer to the context." << std::endl;
return;
}
mProgram.bind();
mProgram.enableAttributeArray("vert");
mProgram.setAttributeBuffer("vert", GL_FLOAT, 0, 3);
mColorLocation = mProgram.uniformLocation("frag_color");
}
void paint_RoundedRect(QPainter &p)
{
static bool first = true;
if (first) {
if (testWidget) {
QGLFormat format = testWidget->format();
if (!format.sampleBuffers())
qWarning() << "Cannot paint antialiased rounded rect without sampleBuffers";
}
first = false;
}
p.setRenderHint(QPainter::Antialiasing, true);
p.setPen(Qt::black);
p.setBrush(Qt::red);
for (int i = 0; i < count; i++) {
for (int j = 0; j < lines; ++j) {
QSize size((j+1)*50, spacing-1);
p.drawRoundedRect(QRectF(QPointF(0,j*spacing), size), 8, 8);
}
}
}
/*!
Returns a window format for the OpenGL format specified by \a format.
*/
QSurfaceFormat QGLFormat::toSurfaceFormat(const QGLFormat &format)
{
QSurfaceFormat retFormat;
if (format.alpha())
retFormat.setAlphaBufferSize(format.alphaBufferSize() == -1 ? 1 : format.alphaBufferSize());
if (format.blueBufferSize() >= 0)
retFormat.setBlueBufferSize(format.blueBufferSize());
if (format.greenBufferSize() >= 0)
retFormat.setGreenBufferSize(format.greenBufferSize());
if (format.redBufferSize() >= 0)
retFormat.setRedBufferSize(format.redBufferSize());
if (format.depth())
retFormat.setDepthBufferSize(format.depthBufferSize() == -1 ? 1 : format.depthBufferSize());
retFormat.setSwapBehavior(format.doubleBuffer() ? QSurfaceFormat::DoubleBuffer : QSurfaceFormat::DefaultSwapBehavior);
if (format.sampleBuffers())
retFormat.setSamples(format.samples() == -1 ? 4 : format.samples());
if (format.stencil())
retFormat.setStencilBufferSize(format.stencilBufferSize() == -1 ? 1 : format.stencilBufferSize());
retFormat.setStereo(format.stereo());
return retFormat;
}
void RCDraw::init( )
{
zoomMul = 0.5;
invertedVerticalAxis=false;
visibleCenter = QVec(2,0);
DRAW_AXIS = false;
DRAW_PERIMETER = false;
imageScale = 1.;
if (qimg!=NULL)
{
imageScale = width/qimg->width();
}
else
{
qimg = new QImage ( width, height, QImage::Format_Indexed8 );
qimg->fill ( 240 );
}
//Gray color table
ctable.resize ( 256 );
for ( int i=0; i < 256; i++ )
{
ctable[i] = qRgb ( i,i,i );
}
qimg->setColorTable ( ctable );
translating = false;
effWin = win;
QGLFormat f = format();
if (f.sampleBuffers())
{
f.setSampleBuffers( true );
setFormat( f );
std::cout << "Sample Buffers On in QGLWidget" << std::endl;
}
else
{
std::cout << "Sample Buffers Off in QGLWidget" << std::endl;
}
show();
}
// static
void SharedGLContext::setWidget(const QGLWidget* pWidget) {
s_pSharedGLWidget = pWidget;
qDebug() << "Set root GL Context widget valid:"
<< pWidget << (pWidget && pWidget->isValid());
const QGLContext* pContext = pWidget->context();
qDebug() << "Created root GL Context valid:" << pContext
<< (pContext && pContext->isValid());
if (pWidget) {
QGLFormat format = pWidget->format();
qDebug() << "Root GL Context format:";
qDebug() << "Double Buffering:" << format.doubleBuffer();
qDebug() << "Swap interval:" << format.swapInterval();
qDebug() << "Depth buffer:" << format.depth();
qDebug() << "Direct rendering:" << format.directRendering();
qDebug() << "Has overlay:" << format.hasOverlay();
qDebug() << "RGBA:" << format.rgba();
qDebug() << "Sample buffers:" << format.sampleBuffers();
qDebug() << "Samples:" << format.samples();
qDebug() << "Stencil buffers:" << format.stencil();
qDebug() << "Stereo:" << format.stereo();
}
}
void GLWidget::initializeGL()
{
QGLFormat glFormat = QGLWidget::format();
if (!glFormat.sampleBuffers()) { std::cerr << "Could not enable sample buffers." << std::endl; return; }
glShadeModel(GL_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glEnable(GL_DEPTH_TEST);
_shaderProgram = new QOpenGLShaderProgram();
if (!_shaderProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, "../OrganicLabyrinth/shader.vert"))
{ std::cerr << "Cannot load vertex shader." << std::endl; return; }
if (!_shaderProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, "../OrganicLabyrinth/shader.frag"))
{ std::cerr << "Cannot load fragment shader." << std::endl; return; }
if ( !_shaderProgram->link() )
{ std::cerr << "Cannot link shaders." << std::endl; return; }
_shaderProgram->bind();
_mvpMatrixLocation = _shaderProgram->uniformLocation("mvpMatrix");
_colorLocation = _shaderProgram->attributeLocation("vertexColor");
_vertexLocation = _shaderProgram->attributeLocation("vert");
_use_color_location = _shaderProgram->uniformLocation("use_color");
InitCells();
InitDots();
// a bad thing
ResetData();
}
/*!
Returns a window format for the OpenGL format specified by \a format.
*/
QSurfaceFormat QGLFormat::toSurfaceFormat(const QGLFormat &format)
{
QSurfaceFormat retFormat;
if (format.alpha())
retFormat.setAlphaBufferSize(format.alphaBufferSize() == -1 ? 1 : format.alphaBufferSize());
if (format.blueBufferSize() >= 0)
retFormat.setBlueBufferSize(format.blueBufferSize());
if (format.greenBufferSize() >= 0)
retFormat.setGreenBufferSize(format.greenBufferSize());
if (format.redBufferSize() >= 0)
retFormat.setRedBufferSize(format.redBufferSize());
if (format.depth())
retFormat.setDepthBufferSize(format.depthBufferSize() == -1 ? 1 : format.depthBufferSize());
retFormat.setSwapBehavior(format.doubleBuffer() ? QSurfaceFormat::DoubleBuffer : QSurfaceFormat::DefaultSwapBehavior);
if (format.sampleBuffers())
retFormat.setSamples(format.samples() == -1 ? 4 : format.samples());
if (format.stencil())
retFormat.setStencilBufferSize(format.stencilBufferSize() == -1 ? 1 : format.stencilBufferSize());
retFormat.setStereo(format.stereo());
retFormat.setMajorVersion(format.majorVersion());
retFormat.setMinorVersion(format.minorVersion());
retFormat.setProfile(static_cast<QSurfaceFormat::OpenGLContextProfile>(format.profile()));
return retFormat;
}
static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[])
{
int i = 0;
attribs[i++] = WGL_SUPPORT_OPENGL_ARB;
attribs[i++] = TRUE;
attribs[i++] = WGL_DRAW_TO_PBUFFER_ARB;
attribs[i++] = TRUE;
if (has_render_texture) {
attribs[i++] = WGL_BIND_TO_TEXTURE_RGBA_ARB;
attribs[i++] = TRUE;
}
attribs[i++] = WGL_COLOR_BITS_ARB;
attribs[i++] = 32;
attribs[i++] = WGL_DOUBLE_BUFFER_ARB;
attribs[i++] = FALSE;
if (f.stereo()) {
attribs[i++] = WGL_STEREO_ARB;
attribs[i++] = TRUE;
}
if (f.depth()) {
attribs[i++] = WGL_DEPTH_BITS_ARB;
attribs[i++] = f.depthBufferSize() == -1 ? 24 : f.depthBufferSize();
}
if (f.redBufferSize() != -1) {
attribs[i++] = WGL_RED_BITS_ARB;
attribs[i++] = f.redBufferSize();
}
if (f.greenBufferSize() != -1) {
attribs[i++] = WGL_GREEN_BITS_ARB;
attribs[i++] = f.greenBufferSize();
}
if (f.blueBufferSize() != -1) {
attribs[i++] = WGL_BLUE_BITS_ARB;
attribs[i++] = f.blueBufferSize();
}
if (f.alpha()) {
attribs[i++] = WGL_ALPHA_BITS_ARB;
attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize();
}
if (f.accum()) {
attribs[i++] = WGL_ACCUM_BITS_ARB;
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
}
if (f.stencil()) {
attribs[i++] = WGL_STENCIL_BITS_ARB;
attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize();
}
if ((f.redBufferSize() > 8 || f.greenBufferSize() > 8
|| f.blueBufferSize() > 8 || f.alphaBufferSize() > 8)
&& (QGLExtensions::glExtensions() & QGLExtensions::NVFloatBuffer))
{
attribs[i++] = WGL_FLOAT_COMPONENTS_NV;
attribs[i++] = TRUE;
}
if (f.sampleBuffers()) {
attribs[i++] = WGL_SAMPLE_BUFFERS_ARB;
attribs[i++] = 1;
attribs[i++] = WGL_SAMPLES_ARB;
attribs[i++] = f.samples() == -1 ? 16 : f.samples();
}
attribs[i] = 0;
}
/*
See qgl.cpp for qdoc comment.
*/
void *QGLContext::chooseVisual()
{
Q_D(QGLContext);
static const int bufDepths[] = { 8, 4, 2, 1 }; // Try 16, 12 also?
//todo: if pixmap, also make sure that vi->depth == pixmap->depth
void* vis = 0;
int i = 0;
bool fail = false;
QGLFormat fmt = format();
bool tryDouble = !fmt.doubleBuffer(); // Some GL impl's only have double
bool triedDouble = false;
bool triedSample = false;
if (fmt.sampleBuffers())
fmt.setSampleBuffers(QGLExtensions::glExtensions & QGLExtensions::SampleBuffers);
while(!fail && !(vis = tryVisual(fmt, bufDepths[i]))) {
if (!fmt.rgba() && bufDepths[i] > 1) {
i++;
continue;
}
if (tryDouble) {
fmt.setDoubleBuffer(true);
tryDouble = false;
triedDouble = true;
continue;
} else if (triedDouble) {
fmt.setDoubleBuffer(false);
triedDouble = false;
}
if (!triedSample && fmt.sampleBuffers()) {
fmt.setSampleBuffers(false);
triedSample = true;
continue;
}
if (fmt.stereo()) {
fmt.setStereo(false);
continue;
}
if (fmt.accum()) {
fmt.setAccum(false);
continue;
}
if (fmt.stencil()) {
fmt.setStencil(false);
continue;
}
if (fmt.alpha()) {
fmt.setAlpha(false);
continue;
}
if (fmt.depth()) {
fmt.setDepth(false);
continue;
}
if (fmt.doubleBuffer()) {
fmt.setDoubleBuffer(false);
continue;
}
fail = true;
}
d->glFormat = fmt;
return vis;
}
void Viewer::initializeGL() {
sceneRoot->buildJointMap(&jointMap);
for (auto& p : jointMap) {
auto id = p.first;
opMap.insert({id, Op()});
}
QGLFormat glFormat = QGLWidget::format();
if (!glFormat.sampleBuffers()) {
std::cerr << "Could not enable sample buffers." << std::endl;
return;
}
glShadeModel(GL_SMOOTH);
glClearColor(0.4, 0.4, 0.4, 0.0);
glFrontFace(GL_CW);
if (!sphereShaders.addShaderFromSourceFile(QGLShader::Vertex, "sphere.vert")) {
std::cerr << "Cannot load vertex shader." << std::endl;
return;
}
if (!sphereShaders.addShaderFromSourceFile(QGLShader::Fragment, "sphere.frag")) {
std::cerr << "Cannot load fragment shader." << std::endl;
return;
}
if (!sphereShaders.link()) {
std::cerr << "Cannot link shaders." << std::endl;
return;
}
mVao.create();
mVao.bind();
float circleData[120];
auto w = width();
auto h = height();
double radius = w < h ? (float)w * 0.25 : (float)h * 0.25;
initCircleData(circleData, radius, M_PI / 40);
mCircleBufferObject.create();
mCircleBufferObject.setUsagePattern(QOpenGLBuffer::StaticDraw);
if (!mCircleBufferObject.bind()) {
std::cerr << "Could not bind circle vertex buffer." << std::endl;
return;
}
mCircleBufferObject.allocate(circleData, sizeof(circleData));
// Nine floats per triangle
float sphereData[numTriangles * 9];
// Three vertices per triangle, and each has a normal (3 floats)
float sphereNormals[numTriangles * 3 * 3];
initSphereData(sphereData, sphereNormals, theta);
mSphereBufferObject.create();
mSphereBufferObject.setUsagePattern(QOpenGLBuffer::StaticDraw);
if (!mSphereBufferObject.bind()) {
std::cerr << "Could not bind sphere vertex buffer." << std::endl;
return;
}
mSphereBufferObject.allocate(sphereData, sizeof(sphereData));
// Sphere normal buffer
mSphereNormalBuffer.create();
mSphereNormalBuffer.setUsagePattern(QOpenGLBuffer::StaticDraw);
if (!mSphereNormalBuffer.bind()) {
std::cerr << "Could not bind sphere normal buffer." << std::endl;
return;
}
mSphereNormalBuffer.allocate(sphereNormals, sizeof(sphereNormals));
sphereShaders.bind();
sphereShaders.enableAttributeArray("vert");
sphereShaders.enableAttributeArray("norm");
sphereShaders.enableAttributeArray("flatFlag");
mvpMatrixLoc = sphereShaders.uniformLocation("mvpMatrix");
mvMatrixLoc = sphereShaders.uniformLocation("mvMatrix");
normMatrixLoc = sphereShaders.uniformLocation("normMatrix");
lightPositionLoc = sphereShaders.uniformLocation("lightPosition");
ambientLightLoc = sphereShaders.uniformLocation("ambientLight");
diffuseColourLoc = sphereShaders.uniformLocation("diffuseColour");
specularColourLoc = sphereShaders.uniformLocation("specularColour");
shininessLoc = sphereShaders.uniformLocation("shininess");
flatLoc = sphereShaders.uniformLocation("flatFlag");
// Constant ambient light
sphereShaders.setUniformValue(ambientLightLoc, QVector3D(0.1, 0.1, 0.1));
}
void GLWidget::initializeGL()
{
/* OpenGL format */
QGLFormat glFormat = QGLWidget::format();
if (!glFormat.sampleBuffers())
{
//std::cerr << "Could not enable sample buffers." << std::endl;
textEdit->append("Could not enable sample buffers.");
return;
}
/* Stuff I forget what their purposes are */
glShadeModel(GL_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor( 1.0, 1.0, 1.0, 1.0 );
glEnable(GL_DEPTH_TEST);
/* Shaders */
_shaderProgram = new QOpenGLShaderProgram();
if (!_shaderProgram->addShaderFromSourceFile(QOpenGLShader::Vertex, SystemParams::v_shader_file.c_str()))
{
//std::cerr << "Cannot load vertex shader." << std::endl;
textEdit->append("Cannot load vertex shader.");
return;
}
if (!_shaderProgram->addShaderFromSourceFile(QOpenGLShader::Fragment, SystemParams::f_shader_file.c_str()))
{
//std::cerr << "Cannot load fragment shader." << std::endl;
textEdit->append("Cannot load fragment shader.");
return;
}
if ( !_shaderProgram->link() )
{
//std::cerr << "Cannot link shaders." << std::endl;
textEdit->append("Cannot link shaders.");
return;
}
_shaderProgram->bind();
_mvpMatrixLocation = _shaderProgram->uniformLocation("mvpMatrix");
_colorLocation = _shaderProgram->attributeLocation("vertexColor");
_vertexLocation = _shaderProgram->attributeLocation("vert");
_use_color_location = _shaderProgram->uniformLocation("use_color");
/* for VBO and VAO */
_vDataHelper = new VertexDataHelper(_shaderProgram);
_pathIO = new PathIO();
// comment these
//CreateCurve();
//BuildCurveVertexData();
// You want image or the actual path ?
//SetImage(QString::fromStdString(SystemParams::temp_png_location));
if (!_pathsVao.isCreated() && _paths.size() > 0)
{
InitializePaths();
}
// a box
_boxes.push_back(ABox(AVector(0, 0),
AVector(0, this->_img_height),
AVector(this->_img_width, 0),
AVector(this->_img_width, this->_img_height)));
_vDataHelper->BuildQuadsVertexData(_boxes, &_boxVbo, &_boxVao);
// an example how to render a triangle
//_triangles.push_back(ATriangle(AVector(1, 1), AVector(25, 25), AVector(1, 50)));
//_vDataHelper->BuildTrianglesVertexData(_triangles, &_triangleVbo, &_triangleVao, QVector3D(1.0, 0.25, 0.25));
// don't remove this
textEdit->append("OpenGL is initialized");
_isGLInitialized = true;
}
AGLPixelFormat QGLContextPrivate::tryFormat(const QGLFormat &format)
{
GLint attribs[40], cnt = 0;
bool device_is_pixmap = (paintDevice->devType() == QInternal::Pixmap);
attribs[cnt++] = AGL_RGBA;
attribs[cnt++] = AGL_BUFFER_SIZE;
attribs[cnt++] = device_is_pixmap ? static_cast<QPixmap *>(paintDevice)->depth() : 32;
attribs[cnt++] = AGL_LEVEL;
attribs[cnt++] = format.plane();
if (format.redBufferSize() != -1) {
attribs[cnt++] = AGL_RED_SIZE;
attribs[cnt++] = format.redBufferSize();
}
if (format.greenBufferSize() != -1) {
attribs[cnt++] = AGL_GREEN_SIZE;
attribs[cnt++] = format.greenBufferSize();
}
if (format.blueBufferSize() != -1) {
attribs[cnt++] = AGL_BLUE_SIZE;
attribs[cnt++] = format.blueBufferSize();
}
if (device_is_pixmap) {
attribs[cnt++] = AGL_PIXEL_SIZE;
attribs[cnt++] = static_cast<QPixmap *>(paintDevice)->depth();
attribs[cnt++] = AGL_OFFSCREEN;
if(!format.alpha()) {
attribs[cnt++] = AGL_ALPHA_SIZE;
attribs[cnt++] = 8;
}
} else {
if(format.doubleBuffer())
attribs[cnt++] = AGL_DOUBLEBUFFER;
}
if(glFormat.stereo())
attribs[cnt++] = AGL_STEREO;
if(format.alpha()) {
attribs[cnt++] = AGL_ALPHA_SIZE;
attribs[cnt++] = format.alphaBufferSize() == -1 ? 8 : format.alphaBufferSize();
}
if(format.stencil()) {
attribs[cnt++] = AGL_STENCIL_SIZE;
attribs[cnt++] = format.stencilBufferSize() == -1 ? 8 : format.stencilBufferSize();
}
if(format.depth()) {
attribs[cnt++] = AGL_DEPTH_SIZE;
attribs[cnt++] = format.depthBufferSize() == -1 ? 32 : format.depthBufferSize();
}
if(format.accum()) {
attribs[cnt++] = AGL_ACCUM_RED_SIZE;
attribs[cnt++] = format.accumBufferSize() == -1 ? 1 : format.accumBufferSize();
attribs[cnt++] = AGL_ACCUM_BLUE_SIZE;
attribs[cnt++] = format.accumBufferSize() == -1 ? 1 : format.accumBufferSize();
attribs[cnt++] = AGL_ACCUM_GREEN_SIZE;
attribs[cnt++] = format.accumBufferSize() == -1 ? 1 : format.accumBufferSize();
attribs[cnt++] = AGL_ACCUM_ALPHA_SIZE;
attribs[cnt++] = format.accumBufferSize() == -1 ? 1 : format.accumBufferSize();
}
if(format.sampleBuffers()) {
attribs[cnt++] = AGL_SAMPLE_BUFFERS_ARB;
attribs[cnt++] = 1;
attribs[cnt++] = AGL_SAMPLES_ARB;
attribs[cnt++] = format.samples() == -1 ? 4 : format.samples();
}
attribs[cnt] = AGL_NONE;
Q_ASSERT(cnt < 40);
return aglChoosePixelFormat(0, 0, attribs);
}
QGLGraphicsSystem::QGLGraphicsSystem(bool useX11GL)
: QGraphicsSystem(), m_useX11GL(useX11GL)
{
#if defined(Q_WS_X11) && !defined(QT_OPENGL_ES)
// only override the system defaults if the user hasn't already
// picked a visual
if (X11->visual == 0 && X11->visual_id == -1 && X11->visual_class == -1) {
// find a double buffered, RGBA visual that supports OpenGL
// and set that as the default visual for windows in Qt
int i = 0;
int spec[16];
spec[i++] = GLX_RGBA;
spec[i++] = GLX_DOUBLEBUFFER;
if (!qgetenv("QT_GL_SWAPBUFFER_PRESERVE").isNull()) {
spec[i++] = GLX_DEPTH_SIZE;
spec[i++] = 8;
spec[i++] = GLX_STENCIL_SIZE;
spec[i++] = 8;
spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
spec[i++] = 1;
spec[i++] = GLX_SAMPLES_ARB;
spec[i++] = 4;
}
spec[i++] = XNone;
XVisualInfo *vi = glXChooseVisual(X11->display, X11->defaultScreen, spec);
if (vi) {
X11->visual_id = vi->visualid;
X11->visual_class = vi->c_class;
QGLFormat format;
int res;
glXGetConfig(X11->display, vi, GLX_LEVEL, &res);
format.setPlane(res);
glXGetConfig(X11->display, vi, GLX_DOUBLEBUFFER, &res);
format.setDoubleBuffer(res);
glXGetConfig(X11->display, vi, GLX_DEPTH_SIZE, &res);
format.setDepth(res);
if (format.depth())
format.setDepthBufferSize(res);
glXGetConfig(X11->display, vi, GLX_RGBA, &res);
format.setRgba(res);
glXGetConfig(X11->display, vi, GLX_RED_SIZE, &res);
format.setRedBufferSize(res);
glXGetConfig(X11->display, vi, GLX_GREEN_SIZE, &res);
format.setGreenBufferSize(res);
glXGetConfig(X11->display, vi, GLX_BLUE_SIZE, &res);
format.setBlueBufferSize(res);
glXGetConfig(X11->display, vi, GLX_ALPHA_SIZE, &res);
format.setAlpha(res);
if (format.alpha())
format.setAlphaBufferSize(res);
glXGetConfig(X11->display, vi, GLX_ACCUM_RED_SIZE, &res);
format.setAccum(res);
if (format.accum())
format.setAccumBufferSize(res);
glXGetConfig(X11->display, vi, GLX_STENCIL_SIZE, &res);
format.setStencil(res);
if (format.stencil())
format.setStencilBufferSize(res);
glXGetConfig(X11->display, vi, GLX_STEREO, &res);
format.setStereo(res);
glXGetConfig(X11->display, vi, GLX_SAMPLE_BUFFERS_ARB, &res);
format.setSampleBuffers(res);
if (format.sampleBuffers()) {
glXGetConfig(X11->display, vi, GLX_SAMPLES_ARB, &res);
format.setSamples(res);
}
QGLWindowSurface::surfaceFormat = format;
XFree(vi);
printf("using visual class %x, id %x\n", X11->visual_class, X11->visual_id);
}
}
#elif defined(Q_WS_WIN)
QGLWindowSurface::surfaceFormat.setDoubleBuffer(true);
qt_win_owndc_required = true;
#endif
}
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
{
QGLTemporaryContext tempContext;
PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB =
(PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB");
PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB =
(PFNWGLGETPBUFFERDCARBPROC) wglGetProcAddress("wglGetPbufferDCARB");
PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB =
(PFNWGLQUERYPBUFFERARBPROC) wglGetProcAddress("wglQueryPbufferARB");
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB =
(PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB");
if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can
return false;
dc = wglGetCurrentDC();
Q_ASSERT(dc);
has_render_texture = false;
// sample buffers doesn't work in conjunction with the render_texture extension
if (!f.sampleBuffers()) {
PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
(PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
if (wglGetExtensionsStringARB) {
QString extensions(QLatin1String(wglGetExtensionsStringARB(dc)));
has_render_texture = extensions.contains(QLatin1String("WGL_ARB_render_texture"));
}
}
int attribs[40];
qt_format_to_attrib_list(has_render_texture, f, attribs);
// Find pbuffer capable pixel format.
unsigned int num_formats = 0;
int pixel_format;
wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
// some GL implementations don't support pbuffers with accum
// buffers, so try that before we give up
if (num_formats == 0 && f.accum()) {
QGLFormat tmp = f;
tmp.setAccum(false);
qt_format_to_attrib_list(has_render_texture, tmp, attribs);
wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
}
if (num_formats == 0) {
qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up.");
return false;
}
format = pfiToQGLFormat(dc, pixel_format);
// NB! The below ONLY works if the width/height are powers of 2.
// Set some pBuffer attributes so that we can use this pBuffer as
// a 2D RGBA texture target.
int pb_attribs[] = {WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, 0};
int pb_attribs_null[] = {0};
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(),
has_render_texture ? pb_attribs : pb_attribs_null);
if (!pbuf) {
// try again without the render_texture extension
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), pb_attribs_null);
has_render_texture = false;
if (!pbuf) {
qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height());
return false;
}
}
dc = wglGetPbufferDCARB(pbuf);
ctx = wglCreateContext(dc);
if (!dc || !ctx) {
qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up.");
return false;
}
// Explicitly disable the render_texture extension if we have a
// multi-sampled pbuffer context. This seems to be a problem only with
// ATI cards if multi-sampling is forced globally in the driver.
wglMakeCurrent(dc, ctx);
GLint samples = 0;
glGetIntegerv(GL_SAMPLES_ARB, &samples);
if (has_render_texture && samples != 0)
has_render_texture = false;
HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0;
if (share_ctx && !wglShareLists(share_ctx, ctx))
qWarning("QGLPixelBuffer: Unable to share display lists - with share widget.");
int width, height;
wglQueryPbufferARB(pbuf, WGL_PBUFFER_WIDTH_ARB, &width);
wglQueryPbufferARB(pbuf, WGL_PBUFFER_HEIGHT_ARB, &height);
return true;
}