QT_BEGIN_NAMESPACE
QGLFormat QGLFormat::fromPlatformWindowFormat(const QPlatformWindowFormat &format)
{
QGLFormat 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());
retFormat.setSamples(format.sampleBuffers());
retFormat.setStencil(format.stencil());
if (format.stencilBufferSize() >= 0)
retFormat.setStencilBufferSize(format.stencilBufferSize());
retFormat.setStereo(format.stereo());
retFormat.setSwapInterval(format.swapInterval());
return retFormat;
}
/*===========================================================================*/
void ScreenBase::create()
{
KVS_ASSERT( m_id == -1 );
// Initialize display mode.
QGLFormat f = QGLFormat::defaultFormat();
f.setDoubleBuffer( displayFormat().doubleBuffer() );
f.setRgba( displayFormat().colorBuffer() );
f.setDepth( displayFormat().depthBuffer() );
f.setAccum( displayFormat().accumulationBuffer() );
f.setStencil( displayFormat().stencilBuffer() );
f.setStereo( displayFormat().stereoBuffer() );
f.setSampleBuffers( displayFormat().multisampleBuffer() );
f.setAlpha( displayFormat().alphaChannel() );
QGLFormat::setDefaultFormat( f );
// Set screen geometry.
QWidget::setGeometry( BaseClass::x(), BaseClass::y(), BaseClass::width(), BaseClass::height() );
QGLWidget::makeCurrent();
// Initialize GLEW.
GLenum result = glewInit();
if ( result != GLEW_OK )
{
const GLubyte* message = glewGetErrorString( result );
kvsMessageError( "GLEW initialization failed: %s.", message );
}
// Create window.
static int counter = 0;
m_id = counter++;
}
void *QGLContext::chooseVisual()
{
static 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;
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 ( 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;
}
glFormat = fmt;
return vis;
}
QGLFormat QtCanvas::getQGLFormat(const Buffers buffers) {
QGLFormat format = QGLFormat();
format.setAlpha(buffers & GLCanvas::ALPHA_BUFFER);
format.setDepth(buffers & GLCanvas::DEPTH_BUFFER);
format.setDoubleBuffer(buffers & GLCanvas::DOUBLE_BUFFER);
format.setStencil(buffers & GLCanvas::STENCIL_BUFFER);
format.setAccum(buffers & GLCanvas::ACCUM_BUFFER);
format.setStereo(buffers & GLCanvas::STEREO_VIEWING);
format.setSampleBuffers(buffers & GLCanvas::MULTISAMPLING);
return format;
}
void GridsPlugin::initDockWidget()
{
// create and add doc widget
_dock_widget = new QDockWidget(QObject::tr("Grid Viewer"));
_dock_widget->setAllowedAreas(Qt::RightDockWidgetArea);
_dock_widget->setObjectName("gridViewerDock");
QGLFormat format;
format.setVersion(2, 1);
format.setDoubleBuffer(true);
format.setDepth(true);
format.setRgba(true);
format.setAlpha(false);
format.setAccum(false);
format.setStencil(false);
format.setStereo(false);
format.setDirectRendering(true);
format.setOverlay(false);
_viewer = new GridViewer(format);
_viewer->setMinimumSize(250, 0);
_viewer->setObjectName("gridViewer");
QVBoxLayout *layout = new QVBoxLayout();
layout->addWidget(_viewer);
QWidget *widget = new QWidget();
widget->setLayout(layout);
_dock_widget->setWidget(widget);
NeuroGui::MainWindow::instance()->addDockWidget(Qt::RightDockWidgetArea, _dock_widget);
// add to view menu
NeuroGui::MainWindow::instance()->toolBarsMenu()->addAction(_dock_widget->toggleViewAction());
}
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
}
/*
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;
}
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;
}
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
{
QGLWidget dmy;
dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed
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 = GetDC(dmy.winId());
Q_ASSERT(dc);
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.");
ReleaseDC(dmy.winId(), dc);
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};
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(),
has_render_texture ? pb_attribs : 0);
if(!pbuf) {
// try again without the render_texture extension
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0);
has_render_texture = false;
if (!pbuf) {
qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height());
ReleaseDC(dmy.winId(), dc);
return false;
}
}
ReleaseDC(dmy.winId(), dc);
dc = wglGetPbufferDCARB(pbuf);
ctx = wglCreateContext(dc);
if (!dc || !ctx) {
qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up.");
return 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;
}
