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[wayland] AbstractBackend announces whether a surface less context is possible

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In an own QPA plugin we want to make the OpenGL context sharing with
our compositing context and bypass the windowing system for OpenGL
windows. In order to achieve this we need a surfaceless context.

The AbstractBackend now forwards whether such a context can be created on
the EGLDisplay used by the Compositor.
This commit is contained in:
Martin Gräßlin 2015-08-18 08:40:35 +02:00
parent b9d7726f7a
commit d837830661
2 changed files with 10 additions and 0 deletions
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5
abstract_backend.cpp
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@ -305,6 +305,11 @@ void AbstractBackend::warpPointer(const QPointF &globalPos)
Q_UNUSED(globalPos) Q_UNUSED(globalPos)
} }
bool AbstractBackend::supportsQpaContext() const
{
return hasGLExtension(QByteArrayLiteral("EGL_KHR_surfaceless_context"));
}
EGLDisplay AbstractBackend::sceneEglDisplay() const EGLDisplay AbstractBackend::sceneEglDisplay() const
{ {
if (Compositor *c = Compositor::self()) { if (Compositor *c = Compositor::self()) {

5
abstract_backend.h
View file

@ -46,6 +46,11 @@ public:
virtual OpenGLBackend *createOpenGLBackend(); virtual OpenGLBackend *createOpenGLBackend();
virtual QPainterBackend *createQPainterBackend(); virtual QPainterBackend *createQPainterBackend();
virtual void warpPointer(const QPointF &globalPos); virtual void warpPointer(const QPointF &globalPos);
/**
* Whether our Compositing EGL display allows a surface less context
* so that a sharing context could be created.
**/
virtual bool supportsQpaContext() const;
/** /**
* The EGLDisplay used by the compositing scene. * The EGLDisplay used by the compositing scene.
**/ **/