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 | 34 |
1 files changed, 34 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 4c98e905f29..5b767df070f 100644 --- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c +++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c @@ -1475,6 +1475,40 @@ intel_miptree_resolve_color(struct intel_context *intel, /** + * Make it possible to share the region backing the given miptree with another + * process or another miptree. + * + * Fast color clears are unsafe with shared buffers, so we need to resolve and + * then discard the MCS buffer, if present. We also set the mcs_state to + * INTEL_MCS_STATE_NONE to ensure that no MCS buffer gets allocated in the + * future. + */ +void +intel_miptree_make_shareable(struct intel_context *intel, + struct intel_mipmap_tree *mt) +{ +#ifdef I915 + /* Nothing needs to be done for I915 */ + (void) intel; + (void) mt; +#else + /* MCS buffers are also used for multisample buffers, but we can't resolve + * away a multisample MCS buffer because it's an integral part of how the + * pixel data is stored. Fortunately this code path should never be + * reached for multisample buffers. + */ + assert(mt->msaa_layout == INTEL_MSAA_LAYOUT_NONE); + + if (mt->mcs_mt) { + intel_miptree_resolve_color(intel, mt); + intel_miptree_release(&mt->mcs_mt); + mt->mcs_state = INTEL_MCS_STATE_NONE; + } +#endif +} + + +/** * \brief Get pointer offset into stencil buffer. * * The stencil buffer is W tiled. Since the GTT is incapable of W fencing, we |