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sna: Allow creation of proxies to proxies 

Just update the offset of the new bo by the offset of the existing
proxy.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-01-30 11:40:02 +00:00
parent 488937edb6
commit 95f3734dd6
1 changed files with 7 additions and 2 deletions
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9
src/sna/kgem.c
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@ -3105,20 +3105,25 @@ struct kgem_bo *kgem_create_proxy(struct kgem_bo *target,
DBG(("%s: target handle=%d, offset=%d, length=%d, io=%d\n",
__FUNCTION__, target->handle, offset, length, target->io));
assert(target->proxy == NULL);
bo = __kgem_bo_alloc(target->handle, length);
if (bo == NULL)
return NULL;
bo->reusable = false;
bo->size.bytes = length;
bo->io = target->io;
bo->dirty = target->dirty;
bo->tiling = target->tiling;
bo->pitch = target->pitch;
if (target->proxy) {
offset += target->delta;
target = target->proxy;
}
bo->proxy = kgem_bo_reference(target);
bo->delta = offset;
bo->reusable = false;
return bo;
}