static HGLRC createContext(const QOpenGLStaticContext &staticContext,
HDC hdc,
const QSurfaceFormat &format,
const QWindowsOpenGLAdditionalFormat &,
HGLRC shared = 0)
{
enum { attribSize = 11 };
if (!staticContext.hasExtensions())
return 0;
int attributes[attribSize];
int attribIndex = 0;
qFill(attributes, attributes + attribSize, int(0));
const int requestedVersion = (format.majorVersion() << 8) + format.minorVersion();
if (requestedVersion > 0x0101) {
attributes[attribIndex++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
attributes[attribIndex++] = format.majorVersion();
attributes[attribIndex++] = WGL_CONTEXT_MINOR_VERSION_ARB;
attributes[attribIndex++] = format.minorVersion();
}
if (requestedVersion >= 0x0300) {
attributes[attribIndex++] = WGL_CONTEXT_FLAGS_ARB;
attributes[attribIndex] = 0;
if (format.testOption(QSurfaceFormat::DeprecatedFunctions))
attributes[attribIndex] |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
if (format.testOption(QSurfaceFormat::DebugContext))
attributes[attribIndex++] |= WGL_CONTEXT_DEBUG_BIT_ARB;
attribIndex++;
}
if (requestedVersion >= 0x0302) {
switch (format.profile()) {
case QSurfaceFormat::NoProfile:
break;
case QSurfaceFormat::CoreProfile:
attributes[attribIndex++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attributes[attribIndex++] = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
break;
case QSurfaceFormat::CompatibilityProfile:
attributes[attribIndex++] = WGL_CONTEXT_PROFILE_MASK_ARB;
attributes[attribIndex++] = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
break;
}
}
if (QWindowsContext::verboseGL)
qDebug("%s: Creating context version %d.%d with %d attributes",
__FUNCTION__, format.majorVersion(), format.minorVersion(), attribIndex / 2);
const HGLRC result =
staticContext.wglCreateContextAttribsARB(hdc, shared, attributes);
if (!result)
qErrnoWarning("%s: wglCreateContextAttribsARB() failed.", __FUNCTION__);
return result;
}
void Widget::printFormat(const QSurfaceFormat &format)
{
m_output->append(tr("OpenGL version: %1.%2").arg(format.majorVersion()).arg(format.minorVersion()));
for (size_t i = 0; i < sizeof(profiles) / sizeof(Profile); ++i)
if (profiles[i].profile == format.profile()) {
m_output->append(tr("Profile: %1").arg(QString::fromLatin1(profiles[i].str)));
break;
}
QString opts;
for (size_t i = 0; i < sizeof(options) / sizeof(Option); ++i)
if (format.testOption(options[i].option))
opts += QString::fromLatin1(options[i].str) + QLatin1Char(' ');
m_output->append(tr("Options: %1").arg(opts));
for (size_t i = 0; i < sizeof(renderables) / sizeof(Renderable); ++i)
if (renderables[i].renderable == format.renderableType()) {
m_output->append(tr("Renderable type: %1").arg(QString::fromLatin1(renderables[i].str)));
break;
}
m_output->append(tr("Depth buffer size: %1").arg(QString::number(format.depthBufferSize())));
m_output->append(tr("Stencil buffer size: %1").arg(QString::number(format.stencilBufferSize())));
m_output->append(tr("Samples: %1").arg(QString::number(format.samples())));
m_output->append(tr("Red buffer size: %1").arg(QString::number(format.redBufferSize())));
m_output->append(tr("Green buffer size: %1").arg(QString::number(format.greenBufferSize())));
m_output->append(tr("Blue buffer size: %1").arg(QString::number(format.blueBufferSize())));
m_output->append(tr("Alpha buffer size: %1").arg(QString::number(format.alphaBufferSize())));
m_output->append(tr("Swap interval: %1").arg(QString::number(format.swapInterval())));
}
void QSGContext::renderContextInitialized(QSGRenderContext *renderContext)
{
Q_D(QSGContext);
d->mutex.lock();
if (d->antialiasingMethod == UndecidedAntialiasing) {
if (Q_UNLIKELY(qEnvironmentVariableIsSet("QSG_ANTIALIASING_METHOD"))) {
const QByteArray aaType = qgetenv("QSG_ANTIALIASING_METHOD");
if (aaType == "msaa")
d->antialiasingMethod = MsaaAntialiasing;
else if (aaType == "vertex")
d->antialiasingMethod = VertexAntialiasing;
}
if (d->antialiasingMethod == UndecidedAntialiasing) {
if (renderContext->openglContext()->format().samples() > 0)
d->antialiasingMethod = MsaaAntialiasing;
else
d->antialiasingMethod = VertexAntialiasing;
}
}
// With OpenGL ES, except for Angle on Windows, use GrayAntialiasing, unless
// some value had been requested explicitly. This could not be decided
// before without a context. Now the context is ready.
if (!d->distanceFieldAntialiasingDecided) {
d->distanceFieldAntialiasingDecided = true;
#ifndef Q_OS_WIN32
if (renderContext->openglContext()->isOpenGLES())
d->distanceFieldAntialiasing = QSGGlyphNode::GrayAntialiasing;
#endif
}
static bool dumped = false;
if (!dumped && QSG_LOG_INFO().isDebugEnabled()) {
dumped = true;
QSurfaceFormat format = renderContext->openglContext()->format();
QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
qCDebug(QSG_LOG_INFO) << "R/G/B/A Buffers: " << format.redBufferSize() << format.greenBufferSize() << format.blueBufferSize() << format.alphaBufferSize();
qCDebug(QSG_LOG_INFO) << "Depth Buffer: " << format.depthBufferSize();
qCDebug(QSG_LOG_INFO) << "Stencil Buffer: " << format.stencilBufferSize();
qCDebug(QSG_LOG_INFO) << "Samples: " << format.samples();
qCDebug(QSG_LOG_INFO) << "GL_VENDOR: " << (const char *) funcs->glGetString(GL_VENDOR);
qCDebug(QSG_LOG_INFO) << "GL_RENDERER: " << (const char *) funcs->glGetString(GL_RENDERER);
qCDebug(QSG_LOG_INFO) << "GL_VERSION: " << (const char *) funcs->glGetString(GL_VERSION);
QSet<QByteArray> exts = renderContext->openglContext()->extensions();
QByteArray all; foreach (const QByteArray &e, exts) all += ' ' + e;
qCDebug(QSG_LOG_INFO) << "GL_EXTENSIONS: " << all.constData();
qCDebug(QSG_LOG_INFO) << "Max Texture Size: " << renderContext->maxTextureSize();
qCDebug(QSG_LOG_INFO) << "Debug context: " << format.testOption(QSurfaceFormat::DebugContext);
}
void QEGLPlatformContext::init(const QSurfaceFormat &format, QPlatformOpenGLContext *share)
{
m_format = q_glFormatFromConfig(m_eglDisplay, m_eglConfig);
// m_format now has the renderableType() resolved (it cannot be Default anymore)
// but does not yet contain version, profile, options.
m_shareContext = share ? static_cast<QEGLPlatformContext *>(share)->m_eglContext : 0;
QVector<EGLint> contextAttrs;
contextAttrs.append(EGL_CONTEXT_CLIENT_VERSION);
contextAttrs.append(format.majorVersion());
const bool hasKHRCreateContext = q_hasEglExtension(m_eglDisplay, "EGL_KHR_create_context");
if (hasKHRCreateContext) {
contextAttrs.append(EGL_CONTEXT_MINOR_VERSION_KHR);
contextAttrs.append(format.minorVersion());
int flags = 0;
// The debug bit is supported both for OpenGL and OpenGL ES.
if (format.testOption(QSurfaceFormat::DebugContext))
flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
// The fwdcompat bit is only for OpenGL 3.0+.
if (m_format.renderableType() == QSurfaceFormat::OpenGL
&& format.majorVersion() >= 3
&& !format.testOption(QSurfaceFormat::DeprecatedFunctions))
flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
if (flags) {
contextAttrs.append(EGL_CONTEXT_FLAGS_KHR);
contextAttrs.append(flags);
}
// Profiles are OpenGL only and mandatory in 3.2+. The value is silently ignored for < 3.2.
if (m_format.renderableType() == QSurfaceFormat::OpenGL) {
contextAttrs.append(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
contextAttrs.append(format.profile() == QSurfaceFormat::CoreProfile
? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
: EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR);
}
}
contextAttrs.append(EGL_NONE);
switch (m_format.renderableType()) {
case QSurfaceFormat::OpenVG:
m_api = EGL_OPENVG_API;
break;
#ifdef EGL_VERSION_1_4
case QSurfaceFormat::OpenGL:
m_api = EGL_OPENGL_API;
break;
#endif // EGL_VERSION_1_4
default:
m_api = EGL_OPENGL_ES_API;
break;
}
eglBindAPI(m_api);
m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, m_shareContext, contextAttrs.constData());
if (m_eglContext == EGL_NO_CONTEXT && m_shareContext != EGL_NO_CONTEXT) {
m_shareContext = 0;
m_eglContext = eglCreateContext(m_eglDisplay, m_eglConfig, 0, contextAttrs.constData());
}
if (m_eglContext == EGL_NO_CONTEXT) {
qWarning("QEGLPlatformContext: Failed to create context: %x", eglGetError());
return;
}
static const bool printConfig = qEnvironmentVariableIntValue("QT_QPA_EGLFS_DEBUG");
if (printConfig) {
qDebug() << "Created context for format" << format << "with config:";
q_printEglConfig(m_eglDisplay, m_eglConfig);
}
// Cannot just call updateFormatFromGL() since it relies on virtuals. Defer it to initialize().
}
