diff options
Diffstat (limited to 'src/mesa/drivers/dri/intel/intel_mipmap_tree.c')
| -rw-r--r-- | src/mesa/drivers/dri/intel/intel_mipmap_tree.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c index 7c95b79..358431b 100644 --- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c +++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c @@ -407,6 +407,7 @@ intel_miptree_release(struct intel_mipmap_tree **mt) intel_region_release(&((*mt)->region)); intel_miptree_release(&(*mt)->stencil_mt); intel_miptree_release(&(*mt)->hiz_mt); + intel_miptree_release(&(*mt)->mcs_mt); intel_resolve_map_clear(&(*mt)->hiz_map); for (i = 0; i < MAX_TEXTURE_LEVELS; i++) { @@ -638,6 +639,52 @@ intel_miptree_copy_teximage(struct intel_context *intel, } bool +intel_miptree_alloc_mcs(struct intel_context *intel, + struct intel_mipmap_tree *mt, + GLuint num_samples) +{ + assert(mt->mcs_mt == NULL); + assert(intel->gen >= 7); /* MCS only used on Gen7+ */ + assert(num_samples == 4); /* TODO: support 8x MSAA */ + + /* From the Ivy Bridge PRM, Vol4 Part1 p76, "MCS Base Address": + * + * "The MCS surface must be stored as Tile Y." + * + * We set msaa_format to INTEL_MSAA_LAYOUT_CMS to force + * intel_miptree_create() to use Y tiling. msaa_format is otherwise + * ignored for the MCS miptree. + */ + mt->mcs_mt = intel_miptree_create(intel, + mt->target, + MESA_FORMAT_A8, + mt->first_level, + mt->last_level, + mt->width0, + mt->height0, + mt->depth0, + true, + 0 /* num_samples */, + INTEL_MSAA_LAYOUT_CMS); + + /* From the Ivy Bridge PRM, Vol 2 Part 1 p326: + * + * When MCS buffer is enabled and bound to MSRT, it is required that it + * is cleared prior to any rendering. + * + * Since we don't use the MCS buffer for any purpose other than rendering, + * it makes sense to just clear it immediately upon allocation. + * + * Note: the clear value for MCS buffers is all 1's, so we memset to 0xff. + */ + void *data = intel_region_map(intel, mt->mcs_mt->region, 0); + memset(data, 0xff, mt->mcs_mt->region->bo->size); + intel_region_unmap(intel, mt->mcs_mt->region); + + return mt->mcs_mt; +} + +bool intel_miptree_alloc_hiz(struct intel_context *intel, struct intel_mipmap_tree *mt, GLuint num_samples) |