diff options
| author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2018-09-18 13:38:14 +0200 |
|---|---|---|
| committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2018-09-25 22:35:58 +0000 |
| commit | c33faac32bcf333c990469d455f967599494347a (patch) | |
| tree | bc42570190d67dc07cb92d9dab4ab6ce465530b2 /src/gui/opengl/qopenglbuffer.cpp | |
| parent | e61a40bff11a250b3976b8a0ffd16915cee123ce (diff) | |
More fixups for GL_CONTEXT_LOST
Fixes the rest of the places we use the pattern of emptying the OpenGL
error stack to be able to handle GL_CONTEXT_LOST, and adds a note about
it in the documentation.
Change-Id: I7eb97dbca45f39295b832d44937023b538b19947
Reviewed-by: David Edmundson <davidedmundson@kde.org>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Diffstat (limited to 'src/gui/opengl/qopenglbuffer.cpp')
| -rw-r--r-- | src/gui/opengl/qopenglbuffer.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/gui/opengl/qopenglbuffer.cpp b/src/gui/opengl/qopenglbuffer.cpp index 69c2baa8d9..000494244d 100644 --- a/src/gui/opengl/qopenglbuffer.cpp +++ b/src/gui/opengl/qopenglbuffer.cpp @@ -43,6 +43,10 @@ #include "qopenglbuffer.h" #include <private/qopenglextensions_p.h> +#ifndef GL_CONTEXT_LOST +#define GL_CONTEXT_LOST 0x0507 +#endif + QT_BEGIN_NAMESPACE /*! @@ -346,7 +350,14 @@ bool QOpenGLBuffer::read(int offset, void *data, int count) Q_D(QOpenGLBuffer); if (!d->funcs->hasOpenGLFeature(QOpenGLFunctions::Buffers) || !d->guard->id()) return false; - while (d->funcs->glGetError() != GL_NO_ERROR) ; // Clear error state. + + while (true) { // Clear error state. + GLenum error = d->funcs->glGetError(); + if (error == GL_NO_ERROR) + break; + if (error == GL_CONTEXT_LOST) + return false; + }; d->funcs->glGetBufferSubData(d->type, offset, count, data); return d->funcs->glGetError() == GL_NO_ERROR; #else |