GraphicsSurfacePrivate(const PlatformGraphicsContext3D shareContext = 0)
: m_display(0)
, m_xPixmap(0)
, m_glxPixmap(0)
, m_glContext(0)
, m_detachedContext(0)
, m_detachedSurface(0)
, m_textureIsYInverted(false)
, m_hasAlpha(false)
{
GLXContext shareContextObject = 0;
m_display = XOpenDisplay(0);
#if PLATFORM(QT)
if (shareContext) {
#if 0
// This code path requires QXcbNativeInterface::nativeResourceForContext() which is not availble in Qt5 on the build bots yet.
QPlatformNativeInterface* nativeInterface = QGuiApplication::platformNativeInterface();
shareContextObject = static_cast<GLXContext>(nativeInterface->nativeResourceForContext(QByteArrayLiteral("glxcontext"), shareContext));
if (!shareContextObject)
return;
#else
// This code path should be removed as soon as QXcbNativeInterface::nativeResourceForContext() can provide the GLXContext.
QOpenGLContext* previousContext = QOpenGLContext::currentContext();
QSurface* previousSurface = previousContext->surface();
QSurface* currentSurface = shareContext->surface();
shareContext->makeCurrent(currentSurface);
shareContextObject = glXGetCurrentContext();
previousContext->makeCurrent(previousSurface);
#endif
}
#endif
m_display = m_offScreenWindow.display();
int attributes[] = {
GLX_LEVEL, 0,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DOUBLEBUFFER, True,
None
};
int numReturned;
m_fbConfigs = glXChooseFBConfig(m_display, DefaultScreen(m_display), attributes, &numReturned);
// Create a GLX context for OpenGL rendering
m_glContext = glXCreateNewContext(m_display, m_fbConfigs[0], GLX_RGBA_TYPE, shareContextObject, true);
}
bool GraphicsContext3DPrivate::makeCurrentIfNeeded() const
{
const QOpenGLContext* currentContext = QOpenGLContext::currentContext();
if (currentContext == m_platformContext)
return true;
return m_platformContext->makeCurrent(m_surface);
}
bool GraphicsContext3DPrivate::isOpenGLES() const
{
if (m_platformContext)
return m_platformContext->isOpenGLES();
#if USE(OPENGL_ES_2)
return true;
#else
return false;
#endif
}
void GraphicsContext3DPrivate::blitMultisampleFramebufferAndRestoreContext()
{
const QOpenGLContext* currentContext = QOpenGLContext::currentContext();
QSurface* currentSurface = 0;
if (currentContext && currentContext != m_platformContext) {
currentSurface = currentContext->surface();
m_platformContext->makeCurrent(m_surface);
}
if (m_context->m_attrs.antialias)
blitMultisampleFramebuffer();
// While the context is still bound, make sure all the Framebuffer content is in finished state.
// This is necessary as we are doing our own double buffering instead of using a drawable that provides swapBuffers.
glFinish();
if (currentContext && currentContext != m_platformContext)
const_cast<QOpenGLContext*>(currentContext)->makeCurrent(currentSurface);
}
bool GraphicsContext3DPrivate::isValid() const
{
if (!m_platformContext || !m_platformContext->isValid())
return false;
return m_platformContext->isOpenGLES() || m_platformContext->format().majorVersion() >= 2;
}
