diff options
Diffstat (limited to 'src/gui/opengl/qopenglvertexarrayobject.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglvertexarrayobject.cpp | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/src/gui/opengl/qopenglvertexarrayobject.cpp b/src/gui/opengl/qopenglvertexarrayobject.cpp index 0262538250..f0837aff96 100644 --- a/src/gui/opengl/qopenglvertexarrayobject.cpp +++ b/src/gui/opengl/qopenglvertexarrayobject.cpp @@ -40,8 +40,10 @@ #include "qopenglvertexarrayobject.h" #include <QtCore/private/qobject_p.h> +#include <QtCore/qthread.h> #include <QtGui/qopenglcontext.h> #include <QtGui/qoffscreensurface.h> +#include <QtGui/qguiapplication.h> #include <QtGui/qopenglfunctions_3_0.h> #include <QtGui/qopenglfunctions_3_2_core.h> @@ -204,18 +206,25 @@ void QOpenGLVertexArrayObjectPrivate::destroy() if (context && context != ctx) { oldContext = ctx; oldContextSurface = ctx ? ctx->surface() : 0; - // Cannot just make the current surface current again with another context. - // The format may be incompatible and some platforms (iOS) may impose - // restrictions on using a window with different contexts. Create an - // offscreen surface (a pbuffer or a hidden window) instead to be safe. - offscreenSurface.reset(new QOffscreenSurface); - offscreenSurface->setFormat(context->format()); - offscreenSurface->create(); - if (context->makeCurrent(offscreenSurface.data())) { - ctx = context; - } else { - qWarning("QOpenGLVertexArrayObject::destroy() failed to make VAO's context current"); + // Before going through the effort of creating an offscreen surface + // check that we are on the GUI thread because otherwise many platforms + // will not able to create that offscreen surface. + if (QThread::currentThread() != qGuiApp->thread()) { ctx = 0; + } else { + // Cannot just make the current surface current again with another context. + // The format may be incompatible and some platforms (iOS) may impose + // restrictions on using a window with different contexts. Create an + // offscreen surface (a pbuffer or a hidden window) instead to be safe. + offscreenSurface.reset(new QOffscreenSurface); + offscreenSurface->setFormat(context->format()); + offscreenSurface->create(); + if (context->makeCurrent(offscreenSurface.data())) { + ctx = context; + } else { + qWarning("QOpenGLVertexArrayObject::destroy() failed to make VAO's context current"); + ctx = 0; + } } } @@ -224,7 +233,7 @@ void QOpenGLVertexArrayObjectPrivate::destroy() context = 0; } - if (vao) { + if (vao && ctx) { switch (vaoFuncsType) { #ifndef QT_OPENGL_ES_2 case Core_3_2: |