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gallium/radeon: allocate only the required plane for flushed depth

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Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Nicolai Hähnle 2016-06-30 17:22:54 +02:00
parent 1a0a8efcce
commit 68fe270e71
1 changed files with 34 additions and 3 deletions
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37
src/gallium/drivers/radeon/r600_texture.c
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@ -1275,12 +1275,43 @@ bool r600_init_flushed_depth_texture(struct pipe_context *ctx,
struct pipe_resource resource;
struct r600_texture **flushed_depth_texture = staging ?
staging : &rtex->flushed_depth_texture;
enum pipe_format pipe_format = texture->format;
if (!staging && rtex->flushed_depth_texture)
return true; /* it's ready */
if (!staging) {
if (rtex->flushed_depth_texture)
return true; /* it's ready */
if (!rtex->can_sample_z && rtex->can_sample_s) {
switch (pipe_format) {
case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
/* Save memory by not allocating the S plane. */
pipe_format = PIPE_FORMAT_Z32_FLOAT;
break;
case PIPE_FORMAT_Z24_UNORM_S8_UINT:
case PIPE_FORMAT_S8_UINT_Z24_UNORM:
/* Save memory bandwidth by not copying the
* stencil part during flush.
*
* This potentially increases memory bandwidth
* if an application uses both Z and S texturing
* simultaneously (a flushed Z24S8 texture
* would be stored compactly), but how often
* does that really happen?
*/
pipe_format = PIPE_FORMAT_Z24X8_UNORM;
break;
default:;
}
} else if (!rtex->can_sample_s && rtex->can_sample_z) {
assert(util_format_has_stencil(util_format_description(pipe_format)));
/* DB->CB copies to an 8bpp surface don't work. */
pipe_format = PIPE_FORMAT_X24S8_UINT;
}
}
resource.target = texture->target;
resource.format = texture->format;
resource.format = pipe_format;
resource.width0 = texture->width0;
resource.height0 = texture->height0;
resource.depth0 = texture->depth0;