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backends/drm: add environment variable KWIN_DRM_NO_DIRECT_SCANOUT

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Can be useful for debugging
This commit is contained in:
Xaver Hugl 2022-01-22 15:07:41 +01:00
parent 52bc46069e
commit c952c3a3ae
1 changed files with 5 additions and 0 deletions
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5
src/backends/drm/egl_gbm_backend.cpp
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@ -633,6 +633,11 @@ void EglGbmBackend::updateBufferAge(Output &output, const QRegion &dirty)
bool EglGbmBackend::scanout(AbstractOutput *drmOutput, SurfaceItem *surfaceItem)
{
static bool valid;
static const bool directScanoutDisabled = qEnvironmentVariableIntValue("KWIN_DRM_NO_DIRECT_SCANOUT", &valid) == 1 && valid;
if (directScanoutDisabled) {
return false;
}
Q_ASSERT(m_outputs.contains(drmOutput));
SurfaceItemWayland *item = qobject_cast<SurfaceItemWayland *>(surfaceItem);
if (!item) {