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i965: Pull query BO reallocation out into a helper function.

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We'll want to reuse this for non-occlusion queries in the future.

Plus, it's a single logical task, so having it as a helper function
clarifies the code somewhat.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Kenneth Graunke 2013-02-27 13:35:05 -08:00
parent 961c9b8cac
commit cf0c0a7782
1 changed files with 33 additions and 23 deletions
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56
src/mesa/drivers/dri/i965/brw_queryobj.c
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@ -488,6 +488,38 @@ static void brw_check_query(struct gl_context *ctx, struct gl_query_object *q)
}
}
/**
* Ensure there query's BO has enough space to store a new pair of values.
*
* If not, gather the existing BO's results and create a new buffer of the
* same size.
*/
static void
ensure_bo_has_space(struct gl_context *ctx, struct brw_query_object *query)
{
struct intel_context *intel = intel_context(ctx);
if (!query->bo || query->last_index * 2 + 1 >= 4096 / sizeof(uint64_t)) {
if (query->bo != NULL) {
/* The old query BO did not have enough space, so we allocated a new
* one. Gather the results so far (adding up the differences) and
* release the old BO.
*/
brw_queryobj_get_results(ctx, query);
}
query->bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1);
/* Fill the buffer with zeroes. This is probably superfluous. */
drm_intel_bo_map(query->bo, true);
memset((char *) query->bo->virtual, 0, 4096);
drm_intel_bo_unmap(query->bo);
query->last_index = 0;
}
}
/**
* Record the PS_DEPTH_COUNT value (for occlusion queries) just before
* primitive drawing.
@ -523,29 +555,7 @@ brw_emit_query_begin(struct brw_context *brw)
if (!query || brw->query.begin_emitted)
return;
/* Ensure the buffer has enough space to store a new pair of values.
* If not, create a new one of the same size; we'll gather the existing
* buffer's results momentarily.
*/
if (!query->bo || query->last_index * 2 + 1 >= 4096 / sizeof(uint64_t)) {
if (query->bo != NULL) {
/* The old query BO did not have enough space, so we allocated a new
* one. Gather the results so far (adding up the differences) and
* release the old BO.
*/
brw_queryobj_get_results(ctx, query);
}
query->bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1);
/* Fill the buffer with zeroes. This is probably superfluous. */
drm_intel_bo_map(query->bo, true);
memset((char *) query->bo->virtual, 0, 4096);
drm_intel_bo_unmap(query->bo);
query->last_index = 0;
}
ensure_bo_has_space(ctx, query);
write_depth_count(intel, query->bo, query->last_index * 2);