CustomWindow::CustomWindow( QWindow *parent ) : QQuickWindow( parent ) {
connect( this, &CustomWindow::vsyncChanged, this, &CustomWindow::vsyncChangedHandler );
// Reinitalize the scene graph when the OpenGL context gets destroyed
// Needed because only when the context gets recreated is the format read
setPersistentOpenGLContext( false );
setPersistentSceneGraph( false );
// Grab window surface format as the OpenGL context will not be created yet
QSurfaceFormat fmt = format();
#if defined( Q_OS_WIN )
// Set buffering mode
// Testing shows that on Windows, vsync stays on (swapBuffers() blocks) while single buffered
// even when the swap interval is 0 and even while fullscreen! So, we have to turn on double buffering if we
// want vsync to actually be off, but turn on single buffering while vsynced to avoid unnecessary additional latency
fmt.setSwapBehavior( vsync ? QSurfaceFormat::SingleBuffer : QSurfaceFormat::DoubleBuffer );
emit doubleBufferedChanged( fmt.swapBehavior() == QSurfaceFormat::DoubleBuffer );
#elif defined( Q_OS_MACX )
fmt.setSwapBehavior( QSurfaceFormat::SingleBuffer );
emit doubleBufferedChanged( fmt.swapBehavior() == QSurfaceFormat::DoubleBuffer );
// For proper OS X fullscreen
setFlags( flags() | Qt::WindowFullscreenButtonHint );
#endif
// Enforce the default value for vsync
fmt.setSwapInterval( vsync ? 1 : 0 );
setFormat( fmt );
}
static PIXELFORMATDESCRIPTOR
qPixelFormatFromSurfaceFormat(const QSurfaceFormat &format,
const QWindowsOpenGLAdditionalFormat &additional)
{
PIXELFORMATDESCRIPTOR pfd;
initPixelFormatDescriptor(&pfd);
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.iLayerType = PFD_MAIN_PLANE;
pfd.dwFlags = PFD_SUPPORT_OPENGL;
if (QSysInfo::windowsVersion() >= QSysInfo::WV_VISTA)
pfd.dwFlags = PFD_SUPPORT_COMPOSITION;
const bool isPixmap = (additional.formatFlags & QWindowsGLRenderToPixmap) != 0;
pfd.dwFlags |= isPixmap ? PFD_DRAW_TO_BITMAP : PFD_DRAW_TO_WINDOW;
if (!(additional.formatFlags & QWindowsGLDirectRendering))
pfd.dwFlags |= PFD_GENERIC_FORMAT;
if (format.stereo())
pfd.dwFlags |= PFD_STEREO;
if (format.swapBehavior() == QSurfaceFormat::DoubleBuffer && !isPixmap)
pfd.dwFlags |= PFD_DOUBLEBUFFER;
pfd.cDepthBits =
format.depthBufferSize() >= 0 ? format.depthBufferSize() : 32;
pfd.cAlphaBits = format.alphaBufferSize() > 0 ? format.alphaBufferSize() : 8;
pfd.cStencilBits = format.stencilBufferSize() > 0 ? format.stencilBufferSize() : 8;
if (additional.formatFlags & QWindowsGLAccumBuffer)
pfd.cAccumRedBits = pfd.cAccumGreenBits = pfd.cAccumBlueBits = pfd.cAccumAlphaBits = 16;
return pfd;
}
void CustomWindow::vsyncChangedHandler( bool vsync ) {
QSurfaceFormat fmt = format();
// Grab OpenGL context surface format if it's ready to go, it's more filled out than the window one
// It can be unitialized on startup before so check that it exists before using it
if( openglContext() ) {
fmt = openglContext()->format();
}
#if defined( Q_OS_WIN )
fmt.setSwapBehavior( vsync ? QSurfaceFormat::SingleBuffer : QSurfaceFormat::DoubleBuffer );
#elif defined( Q_OS_MACX )
// Leave it alone, OS X happily accepts single buffering
#endif
fmt.setSwapInterval( vsync ? 1 : 0 );
// Window must be reset to apply the changes
resetPlatformWindow( fmt );
emit doubleBufferedChanged( fmt.swapBehavior() == QSurfaceFormat::DoubleBuffer );
}
QT_BEGIN_NAMESPACE
/*!
Returns an OpenGL format for the window format specified by \a format.
*/
QGLFormat QGLFormat::fromSurfaceFormat(const QSurfaceFormat &format)
{
QGLFormat retFormat;
if (format.alphaBufferSize() >= 0)
retFormat.setAlphaBufferSize(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.depthBufferSize() >= 0)
retFormat.setDepthBufferSize(format.depthBufferSize());
if (format.samples() > 1) {
retFormat.setSampleBuffers(format.samples());
retFormat.setSamples(true);
}
if (format.stencilBufferSize() > 0) {
retFormat.setStencil(true);
retFormat.setStencilBufferSize(format.stencilBufferSize());
}
retFormat.setDoubleBuffer(format.swapBehavior() != QSurfaceFormat::SingleBuffer);
retFormat.setStereo(format.stereo());
return retFormat;
}
QSurfaceFormat qglx_reduceSurfaceFormat(const QSurfaceFormat &format, bool *reduced)
{
QSurfaceFormat retFormat = format;
*reduced = true;
if (retFormat.redBufferSize() > 1) {
retFormat.setRedBufferSize(1);
} else if (retFormat.greenBufferSize() > 1) {
retFormat.setGreenBufferSize(1);
} else if (retFormat.blueBufferSize() > 1) {
retFormat.setBlueBufferSize(1);
} else if (retFormat.samples() > 1) {
retFormat.setSamples(qMin(retFormat.samples() / 2, 16));
} else if (retFormat.stereo()) {
retFormat.setStereo(false);
}else if (retFormat.stencilBufferSize() > 0) {
retFormat.setStencilBufferSize(0);
}else if (retFormat.hasAlpha()) {
retFormat.setAlphaBufferSize(0);
}else if (retFormat.depthBufferSize() > 0) {
retFormat.setDepthBufferSize(0);
}else if (retFormat.swapBehavior() != QSurfaceFormat::SingleBuffer) {
retFormat.setSwapBehavior(QSurfaceFormat::SingleBuffer);
}else{
*reduced = false;
}
return retFormat;
}
XVisualInfo *qglx_findVisualInfo(Display *display, int screen, QSurfaceFormat *format)
{
Q_ASSERT(format);
XVisualInfo *visualInfo = 0;
GLXFBConfig config = qglx_findConfig(display,screen,*format);
if (config) {
visualInfo = glXGetVisualFromFBConfig(display, config);
*format = qglx_surfaceFormatFromGLXFBConfig(display, config);
}
// attempt to fall back to glXChooseVisual
bool reduced = true;
QSurfaceFormat reducedFormat = *format;
while (!visualInfo && reduced) {
QVarLengthArray<int, 13> attribs;
attribs.append(GLX_RGBA);
if (reducedFormat.redBufferSize() > 0) {
attribs.append(GLX_RED_SIZE);
attribs.append(reducedFormat.redBufferSize());
}
if (reducedFormat.greenBufferSize() > 0) {
attribs.append(GLX_GREEN_SIZE);
attribs.append(reducedFormat.greenBufferSize());
}
if (reducedFormat.blueBufferSize() > 0) {
attribs.append(GLX_BLUE_SIZE);
attribs.append(reducedFormat.blueBufferSize());
}
if (reducedFormat.stencilBufferSize() > 0) {
attribs.append(GLX_STENCIL_SIZE);
attribs.append(reducedFormat.stencilBufferSize());
}
if (reducedFormat.depthBufferSize() > 0) {
attribs.append(GLX_DEPTH_SIZE);
attribs.append(reducedFormat.depthBufferSize());
}
if (reducedFormat.swapBehavior() != QSurfaceFormat::SingleBuffer)
attribs.append(GLX_DOUBLEBUFFER);
attribs.append(XNone);
visualInfo = glXChooseVisual(display, screen, attribs.data());
if (visualInfo)
*format = reducedFormat;
reducedFormat = qglx_reduceSurfaceFormat(reducedFormat, &reduced);
}
return visualInfo;
}
// Choose a suitable pixelformat using GDI WinAPI in case ARB
// functions cannot be found. First tries to find a suitable
// format using GDI function ChoosePixelFormat(). Since that
// does not handle overlay and direct-rendering requests, manually loop
// over the available formats to find the best one.
// Note: As of Windows 7, it seems direct-rendering is handled, so,
// the code might be obsolete?
static int choosePixelFormat(HDC hdc, const QSurfaceFormat &format,
const QWindowsOpenGLAdditionalFormat &additional,
PIXELFORMATDESCRIPTOR *obtainedPfd)
{
// 1) Try ChoosePixelFormat().
PIXELFORMATDESCRIPTOR requestedPfd = qPixelFormatFromSurfaceFormat(format, QWindowsGLDirectRendering);
initPixelFormatDescriptor(obtainedPfd);
int pixelFormat = ChoosePixelFormat(hdc, &requestedPfd);
if (pixelFormat >= 0) {
DescribePixelFormat(hdc, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), obtainedPfd);
if (isAcceptableFormat(additional, *obtainedPfd))
return pixelFormat;
}
// 2) No matching format found, manual search loop.
const int pfiMax = DescribePixelFormat(hdc, 0, 0, NULL);
int bestScore = -1;
int bestPfi = -1;
const bool stereoRequested = format.stereo();
const bool accumBufferRequested = testFlag(additional.formatFlags, QWindowsGLAccumBuffer);
const bool doubleBufferRequested = format.swapBehavior() == QSurfaceFormat::DoubleBuffer;
const bool directRenderingRequested = testFlag(additional.formatFlags, QWindowsGLDirectRendering);
for (int pfi = 1; pfi <= pfiMax; pfi++) {
PIXELFORMATDESCRIPTOR checkPfd;
initPixelFormatDescriptor(&checkPfd);
DescribePixelFormat(hdc, pfi, sizeof(PIXELFORMATDESCRIPTOR), &checkPfd);
if (isAcceptableFormat(additional, checkPfd)) {
int score = checkPfd.cColorBits + checkPfd.cAlphaBits + checkPfd.cStencilBits;
if (accumBufferRequested)
score += checkPfd.cAccumBits;
if (doubleBufferRequested == testFlag(checkPfd.dwFlags, PFD_DOUBLEBUFFER))
score += 1000;
if (stereoRequested == testFlag(checkPfd.dwFlags, PFD_STEREO))
score += 2000;
if (directRenderingRequested == isDirectRendering(checkPfd))
score += 4000;
if (checkPfd.iPixelType == PFD_TYPE_RGBA)
score += 8000;
if (score > bestScore) {
bestScore = score;
bestPfi = pfi;
*obtainedPfd = checkPfd;
}
if (QWindowsContext::verboseGL)
qDebug() << __FUNCTION__ << " checking " << pfi << '/' << pfiMax
<< " score=" << score << " (best " << bestPfi << '/' << bestScore
<< ") " << checkPfd;
}
} // for
if (bestPfi > 0)
pixelFormat = bestPfi;
return pixelFormat;
}
QVector<int> qglx_buildSpec(const QSurfaceFormat &format, int drawableBit)
{
QVector<int> spec(48);
int i = 0;
spec[i++] = GLX_LEVEL;
spec[i++] = 0;
spec[i++] = GLX_DRAWABLE_TYPE; spec[i++] = drawableBit;
spec[i++] = GLX_RENDER_TYPE; spec[i++] = GLX_RGBA_BIT;
spec[i++] = GLX_RED_SIZE; spec[i++] = (format.redBufferSize() == -1) ? 1 : format.redBufferSize();
spec[i++] = GLX_GREEN_SIZE; spec[i++] = (format.greenBufferSize() == -1) ? 1 : format.greenBufferSize();
spec[i++] = GLX_BLUE_SIZE; spec[i++] = (format.blueBufferSize() == -1) ? 1 : format.blueBufferSize();
if (format.hasAlpha()) {
spec[i++] = GLX_ALPHA_SIZE; spec[i++] = format.alphaBufferSize();
}
spec[i++] = GLX_DOUBLEBUFFER; spec[i++] = format.swapBehavior() != QSurfaceFormat::SingleBuffer ? True : False;
spec[i++] = GLX_STEREO; spec[i++] = format.stereo() ? True : False;
if (format.depthBufferSize() > 0) {
spec[i++] = GLX_DEPTH_SIZE; spec[i++] = format.depthBufferSize();
}
if (format.stencilBufferSize() > 0) {
spec[i++] = GLX_STENCIL_SIZE; spec[i++] = (format.stencilBufferSize() == -1) ? 1 : format.stencilBufferSize();
}
if (format.samples() > 1) {
spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
spec[i++] = 1;
spec[i++] = GLX_SAMPLES_ARB;
spec[i++] = format.samples();
}
spec[i++] = XNone;
return spec;
}
QString VariantHandler::displayString(const QVariant& value)
{
switch (value.type()) {
#ifndef QT_NO_CURSOR
case QVariant::Cursor:
{
const QCursor cursor = value.value<QCursor>();
return Util::enumToString(QVariant::fromValue<int>(cursor.shape()), "Qt::CursorShape");
}
#endif
case QVariant::Icon:
{
const QIcon icon = value.value<QIcon>();
if (icon.isNull()) {
return QObject::tr("<no icon>");
}
QStringList l;
foreach (const QSize &size, icon.availableSizes()) {
l.push_back(displayString(size));
}
return l.join(QLatin1String(", "));
}
case QVariant::Line:
return
QString::fromUtf8("%1 x %2 → %3 x %4").
arg(value.toLine().x1()).arg(value.toLine().y1()).
arg(value.toLine().x2()).arg(value.toLine().y2());
case QVariant::LineF:
return
QString::fromUtf8("%1 x %2 → %3 x %4").
arg(value.toLineF().x1()).arg(value.toLineF().y1()).
arg(value.toLineF().x2()).arg(value.toLineF().y2());
case QVariant::Locale:
return value.value<QLocale>().name();
case QVariant::Point:
return
QString::fromLatin1("%1x%2").
arg(value.toPoint().x()).
arg(value.toPoint().y());
case QVariant::PointF:
return
QString::fromLatin1("%1x%2").
arg(value.toPointF().x()).
arg(value.toPointF().y());
case QVariant::Rect:
return
QString::fromLatin1("%1x%2 %3x%4").
arg(value.toRect().x()).
arg(value.toRect().y()).
arg(value.toRect().width()).
arg(value.toRect().height());
case QVariant::RectF:
return
QString::fromLatin1("%1x%2 %3x%4").
arg(value.toRectF().x()).
arg(value.toRectF().y()).
arg(value.toRectF().width()).
arg(value.toRectF().height());
case QVariant::Region:
{
const QRegion region = value.value<QRegion>();
if (region.isEmpty()) {
return QLatin1String("<empty>");
}
if (region.rectCount() == 1) {
return displayString(region.rects().first());
} else {
return QString::fromLatin1("<%1 rects>").arg(region.rectCount());
}
}
case QVariant::Palette:
{
const QPalette pal = value.value<QPalette>();
if (pal == qApp->palette()) {
return QLatin1String("<inherited>");
}
return QLatin1String("<custom>");
}
case QVariant::Size:
return
QString::fromLatin1("%1x%2").
arg(value.toSize().width()).
arg(value.toSize().height());
case QVariant::SizeF:
return
QString::fromLatin1("%1x%2").
arg(value.toSizeF().width()).
arg(value.toSizeF().height());
case QVariant::StringList:
return value.toStringList().join(", ");
case QVariant::Transform:
{
const QTransform t = value.value<QTransform>();
return
QString::fromLatin1("[%1 %2 %3, %4 %5 %6, %7 %8 %9]").
arg(t.m11()).arg(t.m12()).arg(t.m13()).
arg(t.m21()).arg(t.m22()).arg(t.m23()).
arg(t.m31()).arg(t.m32()).arg(t.m33());
}
default:
break;
}
// types with dynamic type ids
if (value.type() == (QVariant::Type)qMetaTypeId<QTextLength>()) {
const QTextLength l = value.value<QTextLength>();
QString typeStr;
switch (l.type()) {
case QTextLength::VariableLength:
typeStr = QObject::tr("variable");
break;
case QTextLength::FixedLength:
typeStr = QObject::tr("fixed");
break;
case QTextLength::PercentageLength:
typeStr = QObject::tr("percentage");
break;
}
return QString::fromLatin1("%1 (%2)").arg(l.rawValue()).arg(typeStr);
}
if (value.userType() == qMetaTypeId<QPainterPath>()) {
const QPainterPath path = value.value<QPainterPath>();
if (path.isEmpty()) {
return QObject::tr("<empty>");
}
return QObject::tr("<%1 elements>").arg(path.elementCount());
}
if (value.userType() == qMetaTypeId<QMargins>()) {
const QMargins margins = value.value<QMargins>();
return QObject::tr("left: %1, top: %2, right: %3, bottom: %4")
.arg(margins.left()).arg(margins.top())
.arg(margins.right()).arg(margins.bottom());
}
if (value.canConvert<QObject*>()) {
return Util::displayString(value.value<QObject*>());
}
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
if (value.userType() == qMetaTypeId<QSet<QByteArray> >()) {
const QSet<QByteArray> set = value.value<QSet<QByteArray> >();
QStringList l;
foreach (const QByteArray &b, set)
l.push_back(QString::fromUtf8(b));
return l.join(", ");
}
if (value.userType() == qMetaTypeId<QSurfaceFormat>()) {
const QSurfaceFormat format = value.value<QSurfaceFormat>();
QString s;
switch (format.renderableType()) {
case QSurfaceFormat::DefaultRenderableType: s += "Default"; break;
case QSurfaceFormat::OpenGL: s += "OpenGL"; break;
case QSurfaceFormat::OpenGLES: s += "OpenGL ES"; break;
case QSurfaceFormat::OpenVG: s += "OpenVG"; break;
}
s += " (" + QString::number(format.majorVersion()) + "." + QString::number(format.minorVersion());
switch (format.profile()) {
case QSurfaceFormat::CoreProfile: s += " core"; break;
case QSurfaceFormat::CompatibilityProfile: s += " compat"; break;
case QSurfaceFormat::NoProfile: break;
}
s += ")";
s += " RGBA: " + QString::number(format.redBufferSize()) + "/" + QString::number(format.greenBufferSize())
+ "/" + QString::number(format.blueBufferSize()) + "/" + QString::number(format.alphaBufferSize());
s += " Depth: " + QString::number(format.depthBufferSize());
s += " Stencil: " + QString::number(format.stencilBufferSize());
s += " Buffer: ";
switch (format.swapBehavior()) {
case QSurfaceFormat::DefaultSwapBehavior: s += "default"; break;
case QSurfaceFormat::SingleBuffer: s += "single"; break;
case QSurfaceFormat::DoubleBuffer: s += "double"; break;
case QSurfaceFormat::TripleBuffer: s += "triple"; break;
default: s += "unknown";
}
return s;
}
if (value.userType() == qMetaTypeId<QSurface::SurfaceClass>()) {
const QSurface::SurfaceClass sc = value.value<QSurface::SurfaceClass>();
switch (sc) {
case QSurface::Window: return QObject::tr("Window");
#if QT_VERSION > QT_VERSION_CHECK(5, 1, 0)
case QSurface::Offscreen: return QObject::tr("Offscreen");
#endif
default: return QObject::tr("Unknown Surface Class");
}
}
if (value.userType() == qMetaTypeId<QSurface::SurfaceType>()) {
const QSurface::SurfaceType type = value.value<QSurface::SurfaceType>();
switch (type) {
case QSurface::RasterSurface: return QObject::tr("Raster");
case QSurface::OpenGLSurface: return QObject::tr("OpenGL");
default: return QObject::tr("Unknown Surface Type");
}
}
#endif
// enums
const QString enumStr = Util::enumToString(value);
if (!enumStr.isEmpty()) {
return enumStr;
}
// custom converters
const QHash<int, Converter<QString>*>::const_iterator it = s_variantHandlerRepository()->stringConverters.constFind(value.userType());
if (it != s_variantHandlerRepository()->stringConverters.constEnd()) {
return (*it.value())(value);
}
return value.toString();
}
// Choose a suitable pixelformat using ARB extension functions.
static int choosePixelFormat(HDC hdc,
const QOpenGLStaticContext &staticContext,
const QSurfaceFormat &format,
const QWindowsOpenGLAdditionalFormat &additional,
PIXELFORMATDESCRIPTOR *obtainedPfd)
{
enum { attribSize =40 };
if ((additional.formatFlags & QWindowsGLRenderToPixmap) || !staticContext.hasExtensions())
return 0;
int iAttributes[attribSize];
qFill(iAttributes, iAttributes + attribSize, int(0));
int i = 0;
iAttributes[i++] = WGL_ACCELERATION_ARB;
iAttributes[i++] = testFlag(additional.formatFlags, QWindowsGLDirectRendering) ?
WGL_FULL_ACCELERATION_ARB : WGL_NO_ACCELERATION_ARB;
iAttributes[i++] = WGL_SUPPORT_OPENGL_ARB;
iAttributes[i++] = TRUE;
iAttributes[i++] = WGL_DRAW_TO_WINDOW_ARB;
iAttributes[i++] = TRUE;
iAttributes[i++] = WGL_COLOR_BITS_ARB;
iAttributes[i++] = 24;
switch (format.swapBehavior()) {
case QSurfaceFormat::DefaultSwapBehavior:
break;
case QSurfaceFormat::SingleBuffer:
iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
iAttributes[i++] = FALSE;
break;
case QSurfaceFormat::DoubleBuffer:
case QSurfaceFormat::TripleBuffer:
iAttributes[i++] = WGL_DOUBLE_BUFFER_ARB;
iAttributes[i++] = TRUE;
break;
}
if (format.stereo()) {
iAttributes[i++] = WGL_STEREO_ARB;
iAttributes[i++] = TRUE;
}
if (format.depthBufferSize() >= 0) {
iAttributes[i++] = WGL_DEPTH_BITS_ARB;
iAttributes[i++] = format.depthBufferSize();
}
iAttributes[i++] = WGL_PIXEL_TYPE_ARB;
iAttributes[i++] = WGL_TYPE_RGBA_ARB;
if (format.redBufferSize() >= 0) {
iAttributes[i++] = WGL_RED_BITS_ARB;
iAttributes[i++] = format.redBufferSize();
}
if (format.greenBufferSize() >= 0) {
iAttributes[i++] = WGL_GREEN_BITS_ARB;
iAttributes[i++] = format.greenBufferSize();
}
if (format.blueBufferSize() >= 0) {
iAttributes[i++] = WGL_BLUE_BITS_ARB;
iAttributes[i++] = format.blueBufferSize();
}
iAttributes[i++] = WGL_ALPHA_BITS_ARB;
iAttributes[i++] = format.alphaBufferSize() >= 0 ? format.alphaBufferSize() : 8;
if (additional.formatFlags & QWindowsGLAccumBuffer) {
iAttributes[i++] = WGL_ACCUM_BITS_ARB;
iAttributes[i++] = 16;
}
iAttributes[i++] = WGL_STENCIL_BITS_ARB;
iAttributes[i++] = 8;
if (additional.formatFlags & QWindowsGLOverlay) {
iAttributes[i++] = WGL_NUMBER_OVERLAYS_ARB;
iAttributes[i++] = 1;
}
const int samples = format.samples();
const bool sampleBuffersRequested = samples > 1
&& testFlag(staticContext.extensions, QOpenGLStaticContext::SampleBuffers);
int samplesValuePosition = 0;
if (sampleBuffersRequested) {
iAttributes[i++] = WGL_SAMPLE_BUFFERS_ARB;
iAttributes[i++] = TRUE;
iAttributes[i++] = WGL_SAMPLES_ARB;
samplesValuePosition = i;
iAttributes[i++] = format.samples();
} else if (samples == 0 || samples == 1 ) {
iAttributes[i++] = WGL_SAMPLE_BUFFERS_ARB;
iAttributes[i++] = FALSE;
}
// If sample buffer request cannot be satisfied, reduce request.
int pixelFormat = 0;
uint numFormats = 0;
while (true) {
const bool valid =
staticContext.wglChoosePixelFormatARB(hdc, iAttributes, 0, 1,
&pixelFormat, &numFormats)
&& numFormats >= 1;
if (valid || !sampleBuffersRequested)
break;
if (iAttributes[samplesValuePosition] > 1) {
iAttributes[samplesValuePosition] /= 2;
} else {
break;
}
}
// Verify if format is acceptable. Note that the returned
// formats have been observed to not contain PFD_SUPPORT_OPENGL, ignore.
initPixelFormatDescriptor(obtainedPfd);
DescribePixelFormat(hdc, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), obtainedPfd);
if (!isAcceptableFormat(additional, *obtainedPfd, true)) {
if (QWindowsContext::verboseGL)
qDebug() << __FUNCTION__ << " obtained px #" << pixelFormat
<< " not acceptable=" << *obtainedPfd;
pixelFormat = 0;
}
#ifndef QT_NO_DEBUG_OUTPUT
if (QWindowsContext::verboseGL) {
QDebug nsp = qDebug().nospace();
nsp << __FUNCTION__;
if (sampleBuffersRequested)
nsp << " samples=" << iAttributes[samplesValuePosition];
nsp << " Attributes: " << hex << showbase;
for (int ii = 0; ii < i; ++ii)
nsp << iAttributes[ii] << ',';
nsp << noshowbase << dec << "\n obtained px #" << pixelFormat
<< " of " << numFormats << "\n " << *obtainedPfd;
} // Debug
#endif
return pixelFormat;
}
void init()
{
LOG_AS("GLInfo");
if (inited) return;
if (!initializeOpenGLFunctions())
{
throw InitError("GLInfo::init", "Failed to initialize OpenGL");
}
// Extensions.
ext.ARB_draw_instanced = query("GL_ARB_draw_instanced");
ext.ARB_instanced_arrays = query("GL_ARB_instanced_arrays");
ext.ARB_texture_env_combine = query("GL_ARB_texture_env_combine") || query("GL_EXT_texture_env_combine");
ext.ARB_texture_non_power_of_two = query("GL_ARB_texture_non_power_of_two");
ext.EXT_blend_subtract = query("GL_EXT_blend_subtract");
ext.EXT_framebuffer_blit = query("GL_EXT_framebuffer_blit");
ext.EXT_framebuffer_multisample = query("GL_EXT_framebuffer_multisample");
ext.EXT_framebuffer_object = query("GL_EXT_framebuffer_object");
ext.EXT_packed_depth_stencil = query("GL_EXT_packed_depth_stencil");
ext.EXT_texture_compression_s3tc = query("GL_EXT_texture_compression_s3tc");
ext.EXT_texture_filter_anisotropic = query("GL_EXT_texture_filter_anisotropic");
ext.EXT_timer_query = query("GL_EXT_timer_query");
ext.ATI_texture_env_combine3 = query("GL_ATI_texture_env_combine3");
ext.NV_framebuffer_multisample_coverage
= query("GL_NV_framebuffer_multisample_coverage");
ext.NV_texture_env_combine4 = query("GL_NV_texture_env_combine4");
ext.SGIS_generate_mipmap = query("GL_SGIS_generate_mipmap");
#ifdef WIN32
ext.Windows_ARB_multisample = query("WGL_ARB_multisample");
ext.Windows_EXT_swap_control = query("WGL_EXT_swap_control");
if (ext.Windows_EXT_swap_control)
{
wglSwapIntervalEXT = de::function_cast<decltype(wglSwapIntervalEXT)>
(QOpenGLContext::currentContext()->getProcAddress("wglSwapIntervalEXT"));
}
#endif
#ifdef DENG_X11
ext.X11_EXT_swap_control = query("GLX_EXT_swap_control");
ext.X11_SGI_swap_control = query("GLX_SGI_swap_control");
ext.X11_MESA_swap_control = query("GLX_MESA_swap_control");
if (ext.X11_EXT_swap_control)
{
glXSwapIntervalEXT = de::function_cast<decltype(glXSwapIntervalEXT)>
(glXGetProcAddress(reinterpret_cast<GLubyte const *>("glXSwapIntervalEXT")));
}
if (ext.X11_SGI_swap_control)
{
glXSwapIntervalSGI = de::function_cast<decltype(glXSwapIntervalSGI)>
(glXGetProcAddress(reinterpret_cast<GLubyte const *>("glXSwapIntervalSGI")));
}
if (ext.X11_MESA_swap_control)
{
glXSwapIntervalMESA = de::function_cast<decltype(glXSwapIntervalMESA)>
(glXGetProcAddress(reinterpret_cast<GLubyte const *>("glXSwapIntervalMESA")));
}
#endif
if (ext.ARB_draw_instanced)
{
ARB_draw_instanced.reset(new QOpenGLExtension_ARB_draw_instanced);
ARB_draw_instanced->initializeOpenGLFunctions();
}
if (ext.ARB_instanced_arrays)
{
ARB_instanced_arrays.reset(new QOpenGLExtension_ARB_instanced_arrays);
ARB_instanced_arrays->initializeOpenGLFunctions();
}
if (ext.EXT_framebuffer_blit)
{
EXT_framebuffer_blit.reset(new QOpenGLExtension_EXT_framebuffer_blit);
EXT_framebuffer_blit->initializeOpenGLFunctions();
}
if (ext.EXT_framebuffer_multisample)
{
EXT_framebuffer_multisample.reset(new QOpenGLExtension_EXT_framebuffer_multisample);
EXT_framebuffer_multisample->initializeOpenGLFunctions();
}
if (ext.EXT_framebuffer_object)
{
EXT_framebuffer_object.reset(new QOpenGLExtension_EXT_framebuffer_object);
EXT_framebuffer_object->initializeOpenGLFunctions();
}
if (ext.NV_framebuffer_multisample_coverage)
{
NV_framebuffer_multisample_coverage.reset(new QOpenGLExtension_NV_framebuffer_multisample_coverage);
NV_framebuffer_multisample_coverage->initializeOpenGLFunctions();
}
// Limits.
glGetIntegerv(GL_MAX_TEXTURE_SIZE, (GLint *) &lim.maxTexSize);
glGetIntegerv(GL_MAX_TEXTURE_UNITS, (GLint *) &lim.maxTexUnits);
if (ext.EXT_texture_filter_anisotropic)
{
glGetIntegerv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, (GLint *) &lim.maxTexFilterAniso);
}
// Set a custom maximum size?
if (CommandLine_CheckWith("-maxtex", 1))
{
lim.maxTexSize = min(ceilPow2(String(CommandLine_Next()).toInt()),
lim.maxTexSize);
LOG_GL_NOTE("Using requested maximum texture size of %i x %i") << lim.maxTexSize << lim.maxTexSize;
}
// Check default OpenGL format attributes.
QOpenGLContext const *ctx = QOpenGLContext::currentContext();
QSurfaceFormat form = ctx->format();
LOGDEV_GL_MSG("Initial OpenGL format:");
LOGDEV_GL_MSG(" - version: %i.%i") << form.majorVersion() << form.minorVersion();
LOGDEV_GL_MSG(" - profile: %s") << (form.profile() == QSurfaceFormat::CompatibilityProfile? "Compatibility" : "Core");
LOGDEV_GL_MSG(" - color: R%i G%i B%i A%i bits") << form.redBufferSize() << form.greenBufferSize() << form.blueBufferSize() << form.alphaBufferSize();
LOGDEV_GL_MSG(" - depth: %i bits") << form.depthBufferSize();
LOGDEV_GL_MSG(" - stencil: %i bits") << form.stencilBufferSize();
LOGDEV_GL_MSG(" - samples: %i") << form.samples();
LOGDEV_GL_MSG(" - swap behavior: %i") << form.swapBehavior();
inited = true;
}
