It is needed to support premultiplied transparent mode on startup for EGLFS/KMS platform-based application. It could be supported if used blend_op property for drmPlane (by default, it used opacity value - coverage).
It would be very useful to be able to initialize the property via environment variable on startup.
Surely, it can be set manually by DRM interface:
int drmModeAtomicAddProperty(drmModeAtomicReqPtr req, uint32_t object_id, uint32_t property_id, uint64_t value);
But it might be a problem with single blink on start.
|For Gerrit Dashboard: QTBUG-75659|
|271027,7||eglfs/kms: Add drm atomic blend_op property handling||dev||qt/qtbase||Status: MERGED||+2||0|