void QGLContext::makeCurrent()
{
if ( !d->valid ) {
#if defined(QT_CHECK_STATE)
qWarning("QGLContext::makeCurrent(): Cannot make invalid context current.");
#endif
return;
}
bool ok = TRUE;
if ( deviceIsPixmap() )
ok = glXMakeCurrent( d->paintDevice->x11Display(),
(GLXPixmap)gpm,
(GLXContext)cx );
else
ok = glXMakeCurrent( d->paintDevice->x11Display(),
((QWidget *)d->paintDevice)->winId(),
(GLXContext)cx );
#if defined(QT_CHECK_NULL)
// qDebug("makeCurrent: %i, vi=%i, vi->vi=%i, vi->id=%i", (int)this, (int)vi, (int)((XVisualInfo*)vi)->visual, (int)((XVisualInfo*)vi)->visualid );
if ( !ok )
qWarning("QGLContext::makeCurrent(): Failed.");
#endif
if ( ok )
currentCtx = this;
}
/* state:done?(simple version) */
bool QGLContext::chooseContext( const QGLContext* shareContext )
{
qDebug( "qgl_win.cpp:QGLContext::chooseContext()" );
// Some kind of workaround, to force loading of opengl module....
// Seems to be neccessary....why?
if ( !force_opengl_loading ) {
GLint params;
glGetIntegerv( GL_DEPTH_BITS, ¶ms );
force_opengl_loading = TRUE;
}
/* simple implementation:
assumes that:
1.colordepth is SAME as desktop
2.RGBA pixels
3.no alpna
4.no acc
5.32-bit depth buffer
6.no aux/stencil buffers
7.
More correct implementation would use glGetXXX to
for example:glGetbooleanv for GL_DOUBLEBUFFER...*/
//TODO:what if setContext is NOT yet called and so dc is invalid?
HDC aDc;
if ( deviceIsPixmap() ) {
win = 0;
aDc = d->paintDevice->handle();
} else {
win = ( ( QWidget* ) d->paintDevice ) ->winId();
aDc = GetDC( win ); //wglGetCurrentDC();
}
if ( !aDc ) { // needs a device context
#if defined(QT_CHECK_NULL)
qWarning( "qgl_win.cpp: QGLContext::chooseContext(): Paint device cannot be null" );
#endif
if ( win ) {
ReleaseDC( win, aDc );
}
return FALSE;
}
PIXELFORMATDESCRIPTOR pfd;
pixelFormatId = choosePixelFormat( &pfd, aDc );
if ( ( !SetPixelFormat( aDc, pixelFormatId, &pfd ) ) ) {
qglError( "qgl_win.cpp: QGLContext::choosePixelFormat()", "SetPixelFormat" );
if ( win ) {
ReleaseDC( win, aDc );
return FALSE;
}
}
rc = wglCreateContext( aDc );
if ( !rc ) {
qglError( "qgl_win.cpp: QGLContext:chooseContext()", "wglCreateContext" );
if ( win )
ReleaseDC( win, aDc );
return FALSE;
}
return TRUE;
}
void QGLContext::swapBuffers() const
{
if ( !d->valid )
return;
if ( !deviceIsPixmap() )
glXSwapBuffers( d->paintDevice->x11Display(),
((QWidget *)d->paintDevice)->winId() );
}
//state:done?
//must be kept in sync with chooseContext
int QGLContext::choosePixelFormat( void * pfd_void, HDC phdc )
{
PIXELFORMATDESCRIPTOR * ppfd = ( PIXELFORMATDESCRIPTOR * ) pfd_void;
memset( ppfd, 0, sizeof( PIXELFORMATDESCRIPTOR ) );
ppfd->nSize = sizeof( PIXELFORMATDESCRIPTOR );
ppfd->nVersion = 1;
ppfd->dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
ppfd->iPixelType = PFD_TYPE_RGBA; // RGBA type
if ( deviceIsPixmap() )
ppfd->dwFlags |= PFD_DRAW_TO_BITMAP;
else
ppfd->dwFlags |= PFD_DRAW_TO_WINDOW;
if ( glFormat.doubleBuffer() && !deviceIsPixmap() )
ppfd->dwFlags |= PFD_DOUBLEBUFFER;
if ( glFormat.stereo() )
ppfd->dwFlags |= PFD_STEREO;
if ( glFormat.depth() )
ppfd->cDepthBits = 16;
else
ppfd->dwFlags |= PFD_DEPTH_DONTCARE;
if ( glFormat.rgba() ) {
ppfd->iPixelType = PFD_TYPE_RGBA;
if ( deviceIsPixmap() )
ppfd->cColorBits = 16;
else
ppfd->cColorBits = 16;
} else {
ppfd->iPixelType = PFD_TYPE_COLORINDEX;
ppfd->cColorBits = 0;
}
ppfd->cAlphaBits = 0;
ppfd->cAccumBits = 0;
ppfd->cStencilBits = 0;
ppfd->iLayerType = PFD_MAIN_PLANE;
int pixelFormat;
if ( ( pixelFormat = ChoosePixelFormat( phdc, ppfd ) ) == 0 )
qglError( "qgl_win.cpp:QGLContext::choosePixelFormat()", "ChoosePixelFormat()" );
return pixelFormat;
}
void QGLContext::swapBuffers() const
{
Q_D(const QGLContext);
if (!d->valid)
return;
if (!deviceIsPixmap()) {
int interval = d->glFormat.swapInterval();
if (interval > 0) {
typedef int (*qt_glXGetVideoSyncSGI)(uint *);
typedef int (*qt_glXWaitVideoSyncSGI)(int, int, uint *);
static qt_glXGetVideoSyncSGI glXGetVideoSyncSGI = 0;
static qt_glXWaitVideoSyncSGI glXWaitVideoSyncSGI = 0;
static bool resolved = false;
if (!resolved) {
QString glxExt = QString(QLatin1String(glXGetClientString(QX11Info::display(), GLX_EXTENSIONS)));
if (glxExt.contains(QLatin1String("GLX_SGI_video_sync"))) {
#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
void *handle = dlopen(NULL, RTLD_LAZY);
if (handle) {
glXGetVideoSyncSGI = (qt_glXGetVideoSyncSGI) dlsym(handle, "glXGetVideoSyncSGI");
glXWaitVideoSyncSGI = (qt_glXWaitVideoSyncSGI) dlsym(handle, "glXWaitVideoSyncSGI");
dlclose(handle);
}
if (!glXGetVideoSyncSGI)
#endif
{
extern const QString qt_gl_library_name();
QLibrary lib(qt_gl_library_name());
glXGetVideoSyncSGI = (qt_glXGetVideoSyncSGI) lib.resolve("glXGetVideoSyncSGI");
glXWaitVideoSyncSGI = (qt_glXWaitVideoSyncSGI) lib.resolve("glXWaitVideoSyncSGI");
}
}
resolved = true;
}
if (glXGetVideoSyncSGI && glXWaitVideoSyncSGI) {
uint counter;
if (!glXGetVideoSyncSGI(&counter))
glXWaitVideoSyncSGI(interval + 1, (counter + interval) % (interval + 1), &counter);
}
}
glXSwapBuffers(qt_x11Info(d->paintDevice)->display(),
static_cast<QWidget *>(d->paintDevice)->winId());
}
}
bool QGLContext::chooseContext( const QGLContext* shareContext )
{
Display* disp = d->paintDevice->x11Display();
vi = chooseVisual();
if ( !vi )
return FALSE;
if ( deviceIsPixmap() &&
(((XVisualInfo*)vi)->depth != d->paintDevice->x11Depth() ||
((XVisualInfo*)vi)->screen != d->paintDevice->x11Screen()) )
{
XFree( vi );
XVisualInfo appVisInfo;
memset( &appVisInfo, 0, sizeof(XVisualInfo) );
appVisInfo.visualid = XVisualIDFromVisual( (Visual*)d->paintDevice->x11Visual() );
appVisInfo.screen = d->paintDevice->x11Screen();
int nvis;
vi = XGetVisualInfo( disp, VisualIDMask | VisualScreenMask, &appVisInfo, &nvis );
if ( !vi )
return FALSE;
int useGL;
glXGetConfig( disp, (XVisualInfo*)vi, GLX_USE_GL, &useGL );
if ( !useGL )
return FALSE; //# Chickening out already...
}
int res;
glXGetConfig( disp, (XVisualInfo*)vi, GLX_LEVEL, &res );
glFormat.setPlane( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_DOUBLEBUFFER, &res );
glFormat.setDoubleBuffer( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_DEPTH_SIZE, &res );
glFormat.setDepth( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_RGBA, &res );
glFormat.setRgba( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_ALPHA_SIZE, &res );
glFormat.setAlpha( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_ACCUM_RED_SIZE, &res );
glFormat.setAccum( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_STENCIL_SIZE, &res );
glFormat.setStencil( res );
glXGetConfig( disp, (XVisualInfo*)vi, GLX_STEREO, &res );
glFormat.setStereo( res );
Bool direct = format().directRendering() ? True : False;
if ( shareContext &&
( !shareContext->isValid() || !shareContext->cx ) ) {
#if defined(QT_CHECK_NULL)
qWarning("QGLContext::chooseContext(): Cannot share with invalid context");
#endif
shareContext = 0;
}
// 1. Sharing between rgba and color-index will give wrong colors.
// 2. Contexts cannot be shared btw. direct/non-direct renderers.
// 3. Pixmaps cannot share contexts that are set up for direct rendering.
if ( shareContext && (format().rgba() != shareContext->format().rgba() ||
(deviceIsPixmap() &&
glXIsDirect( disp, (GLXContext)shareContext->cx ))))
shareContext = 0;
cx = 0;
if ( shareContext ) {
cx = glXCreateContext( disp, (XVisualInfo *)vi,
(GLXContext)shareContext->cx, direct );
if ( cx )
d->sharing = TRUE;
}
if ( !cx )
cx = glXCreateContext( disp, (XVisualInfo *)vi, None, direct );
if ( !cx )
return FALSE;
glFormat.setDirectRendering( glXIsDirect( disp, (GLXContext)cx ) );
if ( deviceIsPixmap() ) {
#if defined(GLX_MESA_pixmap_colormap) && defined(QGL_USE_MESA_EXT)
gpm = glXCreateGLXPixmapMESA( disp, (XVisualInfo *)vi,
d->paintDevice->handle(),
choose_cmap( disp, (XVisualInfo *)vi ) );
#else
gpm = (Q_UINT32)glXCreateGLXPixmap( disp, (XVisualInfo *)vi,
d->paintDevice->handle() );
#endif
if ( !gpm )
return FALSE;
}
return TRUE;
}
bool QGLContext::chooseContext(const QGLContext* shareContext)
{
Q_D(QGLContext);
const QX11Info *xinfo = qt_x11Info(d->paintDevice);
Display* disp = xinfo->display();
d->vi = chooseVisual();
if (!d->vi)
return false;
if (deviceIsPixmap() &&
(((XVisualInfo*)d->vi)->depth != xinfo->depth() ||
((XVisualInfo*)d->vi)->screen != xinfo->screen()))
{
XFree(d->vi);
XVisualInfo appVisInfo;
memset(&appVisInfo, 0, sizeof(XVisualInfo));
appVisInfo.visualid = XVisualIDFromVisual((Visual *) xinfo->visual());
appVisInfo.screen = xinfo->screen();
int nvis;
d->vi = XGetVisualInfo(disp, VisualIDMask | VisualScreenMask, &appVisInfo, &nvis);
if (!d->vi)
return false;
int useGL;
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_USE_GL, &useGL);
if (!useGL)
return false; //# Chickening out already...
}
int res;
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_LEVEL, &res);
d->glFormat.setPlane(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_DOUBLEBUFFER, &res);
d->glFormat.setDoubleBuffer(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_DEPTH_SIZE, &res);
d->glFormat.setDepth(res);
if (d->glFormat.depth())
d->glFormat.setDepthBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_RGBA, &res);
d->glFormat.setRgba(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_RED_SIZE, &res);
d->glFormat.setRedBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_GREEN_SIZE, &res);
d->glFormat.setGreenBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_BLUE_SIZE, &res);
d->glFormat.setBlueBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_ALPHA_SIZE, &res);
d->glFormat.setAlpha(res);
if (d->glFormat.alpha())
d->glFormat.setAlphaBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_ACCUM_RED_SIZE, &res);
d->glFormat.setAccum(res);
if (d->glFormat.accum())
d->glFormat.setAccumBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_STENCIL_SIZE, &res);
d->glFormat.setStencil(res);
if (d->glFormat.stencil())
d->glFormat.setStencilBufferSize(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_STEREO, &res);
d->glFormat.setStereo(res);
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_SAMPLE_BUFFERS_ARB, &res);
d->glFormat.setSampleBuffers(res);
if (d->glFormat.sampleBuffers()) {
glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_SAMPLES_ARB, &res);
d->glFormat.setSamples(res);
}
Bool direct = format().directRendering() ? True : False;
if (shareContext &&
(!shareContext->isValid() || !shareContext->d_func()->cx)) {
qWarning("QGLContext::chooseContext(): Cannot share with invalid context");
shareContext = 0;
}
// 1. Sharing between rgba and color-index will give wrong colors.
// 2. Contexts cannot be shared btw. direct/non-direct renderers.
// 3. Pixmaps cannot share contexts that are set up for direct rendering.
// 4. If the contexts are not created on the same screen, they can't be shared
if (shareContext
&& (format().rgba() != shareContext->format().rgba()
|| (deviceIsPixmap() && glXIsDirect(disp, (GLXContext)shareContext->d_func()->cx))
|| (shareContext->d_func()->screen != xinfo->screen())))
{
shareContext = 0;
}
d->cx = 0;
if (shareContext) {
d->cx = glXCreateContext(disp, (XVisualInfo *)d->vi,
(GLXContext)shareContext->d_func()->cx, direct);
d->screen = ((XVisualInfo*)d->vi)->screen;
if (d->cx) {
QGLContext *share = const_cast<QGLContext *>(shareContext);
d->sharing = true;
share->d_func()->sharing = true;
}
}
if (!d->cx) {
d->cx = glXCreateContext(disp, (XVisualInfo *)d->vi, NULL, direct);
d->screen = ((XVisualInfo*)d->vi)->screen;
}
if (!d->cx)
return false;
d->glFormat.setDirectRendering(glXIsDirect(disp, (GLXContext)d->cx));
if (deviceIsPixmap()) {
#if defined(GLX_MESA_pixmap_colormap) && defined(QGL_USE_MESA_EXT)
d->gpm = glXCreateGLXPixmapMESA(disp, (XVisualInfo *)d->vi,
qt_x11Handle(d->paintDevice),
qt_gl_choose_cmap(disp, (XVisualInfo *)d->vi));
#else
d->gpm = (quint32)glXCreateGLXPixmap(disp, (XVisualInfo *)d->vi,
qt_x11Handle(d->paintDevice));
#endif
if (!d->gpm)
return false;
}
QString glxExt = QString(QLatin1String(glXGetClientString(QX11Info::display(), GLX_EXTENSIONS)));
if (glxExt.contains(QLatin1String("GLX_SGI_video_sync"))) {
if (d->glFormat.swapInterval() == -1)
d->glFormat.setSwapInterval(0);
} else {
d->glFormat.setSwapInterval(-1);
}
return true;
}
/*****************************************************************************
QGLContext AGL-specific code
*****************************************************************************/
bool QGLContext::chooseContext(const QGLContext* shareContext)
{
Q_D(QGLContext);
d->cx = 0;
d->vi = chooseMacVisual(0);
if(!d->vi)
return false;
AGLPixelFormat fmt = (AGLPixelFormat)d->vi;
GLint res;
aglDescribePixelFormat(fmt, AGL_LEVEL, &res);
d->glFormat.setPlane(res);
if(deviceIsPixmap())
res = 0;
else
aglDescribePixelFormat(fmt, AGL_DOUBLEBUFFER, &res);
d->glFormat.setDoubleBuffer(res);
aglDescribePixelFormat(fmt, AGL_DEPTH_SIZE, &res);
d->glFormat.setDepth(res);
if (d->glFormat.depth())
d->glFormat.setDepthBufferSize(res);
aglDescribePixelFormat(fmt, AGL_RGBA, &res);
d->glFormat.setRgba(res);
aglDescribePixelFormat(fmt, AGL_RED_SIZE, &res);
d->glFormat.setRedBufferSize(res);
aglDescribePixelFormat(fmt, AGL_GREEN_SIZE, &res);
d->glFormat.setGreenBufferSize(res);
aglDescribePixelFormat(fmt, AGL_BLUE_SIZE, &res);
d->glFormat.setBlueBufferSize(res);
aglDescribePixelFormat(fmt, AGL_ALPHA_SIZE, &res);
d->glFormat.setAlpha(res);
if (d->glFormat.alpha())
d->glFormat.setAlphaBufferSize(res);
aglDescribePixelFormat(fmt, AGL_ACCUM_RED_SIZE, &res);
// Bug in Apple OpenGL (rdr://5015603), when we don't have an accumulation
// buffer, it still claims that we have a 16-bit one (which is pretty rare).
// So, we just assume we can never have a buffer that small.
d->glFormat.setAccum(res > 5);
if (d->glFormat.accum())
d->glFormat.setAccumBufferSize(res);
aglDescribePixelFormat(fmt, AGL_STENCIL_SIZE, &res);
d->glFormat.setStencil(res);
if (d->glFormat.stencil())
d->glFormat.setStencilBufferSize(res);
aglDescribePixelFormat(fmt, AGL_STEREO, &res);
d->glFormat.setStereo(res);
aglDescribePixelFormat(fmt, AGL_SAMPLE_BUFFERS_ARB, &res);
d->glFormat.setSampleBuffers(res);
if (d->glFormat.sampleBuffers()) {
aglDescribePixelFormat(fmt, AGL_SAMPLES_ARB, &res);
d->glFormat.setSamples(res);
}
if(shareContext && (!shareContext->isValid() || !shareContext->d_func()->cx)) {
qWarning("QGLContext::chooseContext(): Cannot share with invalid context");
shareContext = 0;
}
// sharing between rgba and color-index will give wrong colors
if(shareContext && (format().rgba() != shareContext->format().rgba()))
shareContext = 0;
AGLContext ctx = aglCreateContext(fmt, (AGLContext) (shareContext ? shareContext->d_func()->cx : 0));
if(!ctx) {
GLenum err = aglGetError();
if(err == AGL_BAD_MATCH || err == AGL_BAD_CONTEXT) {
if(shareContext && shareContext->d_func()->cx) {
qWarning("QGLContext::chooseContext(): Context sharing mismatch!");
if(!(ctx = aglCreateContext(fmt, 0)))
return false;
shareContext = 0;
}
}
if(!ctx) {
qWarning("QGLContext::chooseContext(): Unable to create QGLContext");
return false;
}
}
d->cx = ctx;
if (shareContext && shareContext->d_func()->cx) {
QGLContext *share = const_cast<QGLContext *>(shareContext);
d->sharing = true;
share->d_func()->sharing = true;
}
if(deviceIsPixmap())
updatePaintDevice();
// vblank syncing
GLint interval = d->reqFormat.swapInterval();
if (interval != -1) {
aglSetInteger((AGLContext)d->cx, AGL_SWAP_INTERVAL, &interval);
if (interval != 0)
aglEnable((AGLContext)d->cx, AGL_SWAP_INTERVAL);
else
aglDisable((AGLContext)d->cx, AGL_SWAP_INTERVAL);
}
aglGetInteger((AGLContext)d->cx, AGL_SWAP_INTERVAL, &interval);
d->glFormat.setSwapInterval(interval);
return true;
}