metal: Tie drawable's MTLTexture lifetime to MTLCommandBufferHEADdev

By default we define QRHI_METAL_COMMAND_BUFFERS_WITH_UNRETAINED_REFERENCES,
which means we create MTLCommandBuffer via commandBufferWithUnretainedReferences.

In this case, if Metal API validation diagnostics is enabled in Xcode,
the texture is released before the command buffer is done with it, so
we manually ensure the lifetime of the texture extends until the command
buffer is complete.

Pick-to: 6.7
Change-Id: I9b9efa96b4a004f43e0b72144aafc4b440c7fbb4
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

0 files changed, 0 insertions, 0 deletions