buffer->zscan_source = dec->context->create_sampler_view(dec->context, res, &sv_tmpl);
pipe_resource_reference(&res, NULL);
if (!buffer->zscan_source)
buffer->zscan_source = dec->context->create_sampler_view(dec->context, res, &sv_tmpl);
pipe_resource_reference(&res, NULL);
if (!buffer->zscan_source)