Add QEGLContext::invalidateContext

QEGLContext::invalidateContext will mark that egl context is invalide
and trigger SceneGraph to destroy it, create a new one and re-create
and re-upload all resources (e.g. textures) associated with the current
state of the SceneGraph

In addition this change also improves
QEglFSWindow::invalidateSurface() and
QEglFSContext::eglSurfaceForPlatformSurface(..)

Where QEglFSWindow::invalidateSurface() will now destroy the
corresponding EGLSurface via eglDestroySurface, including "unbinding"
it from the current thread via eglMakeCurrent and
un-setting the screen's EGLSurface in case it's the same resource.

QEglFSContext::eglSurfaceForPlatformSurface(..) will now call
QEglFSWindow::resetSurface() in case of getting a EGL_NO_SURFACE
from the QEglFSWindow (which happens if above invalidateSurface()
was called before) - therefor re-creating the resource if
it was destoyed via QEglFSWindow::invalidateSurface()

Pick-to: 6.5
Change-Id: I37badd1fc11e993c395fb1502e9bd27ebe18b821
Reviewed-by: Laszlo Agocs <[email protected]>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gui/platform/unix/qunixnativeinterface.cpp b/src/gui/platform/unix/qunixnativeinterface.cpp
index 1cca97b34c8..1f891de0f50 100644
--- a/src/gui/platform/unix/qunixnativeinterface.cpp
+++ b/src/gui/platform/unix/qunixnativeinterface.cpp
@@ -123,6 +123,22 @@ QOpenGLContext *QNativeInterface::QGLXContext::fromNative(GLXContext visualBased
     \return the EGLDisplay associated with the underlying EGLContext.
 */
 
+
+/*!
+    \fn void QNativeInterface::QEGLContext::invalidateContext()
+    \since 6.5
+    \brief Marks the context as invalid
+
+    If this context is used by the Qt Quick scenegraph, this will trigger the
+    SceneGraph to destroy this context and create a new one.
+
+    Similarly to QPlatformWindow::invalidateSurface(),
+    this function can only be expected to have an effect on certain platforms,
+    such as eglfs.
+
+    \sa QOpenGLContext::isValid(), QPlatformWindow::invalidateSurface()
+*/
+
 QT_DEFINE_NATIVE_INTERFACE(QEGLContext);
 QT_DEFINE_PRIVATE_NATIVE_INTERFACE(QEGLIntegration);