diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 26 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/intel_mipmap_tree.h | 4 |
2 files changed, 30 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c index 1f4c59b6cc3..f926265316b 100644 --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c @@ -266,6 +266,32 @@ intel_miptree_supports_non_msrt_fast_clear(struct brw_context *brw, return true; } +/* On Gen9 support for color buffer compression was extended to single + * sampled surfaces. This is a helper considering both auxiliary buffer + * type and number of samples telling if the given miptree represents + * the new single sampled case - also called lossless compression. + */ +bool +intel_miptree_is_lossless_compressed(const struct brw_context *brw, + const struct intel_mipmap_tree *mt) +{ + /* Only available from Gen9 onwards. */ + if (brw->gen < 9) + return false; + + /* Compression always requires auxiliary buffer. */ + if (!mt->mcs_mt) + return false; + + /* Single sample compression is represented re-using msaa compression + * layout type: "Compressed Multisampled Surfaces". + */ + if (mt->msaa_layout != INTEL_MSAA_LAYOUT_CMS) + return false; + + /* And finally distinguish between msaa and single sample case. */ + return mt->num_samples <= 1; +} /** * Determine depth format corresponding to a depth+stencil format, diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h index 08cb1b8fb39..155e507d583 100644 --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.h +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.h @@ -667,6 +667,10 @@ intel_get_non_msrt_mcs_alignment(struct intel_mipmap_tree *mt, unsigned *width_px, unsigned *height); bool +intel_miptree_is_lossless_compressed(const struct brw_context *brw, + const struct intel_mipmap_tree *mt); + +bool intel_miptree_alloc_non_msrt_mcs(struct brw_context *brw, struct intel_mipmap_tree *mt); |