Mesa (master): gallium: Add TGSI shader token for ARB_post_depth_coverage

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: af788a82d50d0251fe29e205c25a4d29234709ff
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=af788a82d50d0251fe29e205c25a4d29234709ff

Author: Lyude <lyude at redhat.com>
Date:   Wed May 24 15:42:38 2017 -0400

gallium: Add TGSI shader token for ARB_post_depth_coverage

Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 src/gallium/auxiliary/tgsi/tgsi_strings.c  | 1 +
 src/gallium/docs/source/tgsi.rst           | 7 +++++++
 src/gallium/include/pipe/p_shader_tokens.h | 1 +
 3 files changed, 9 insertions(+)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_strings.c b/src/gallium/auxiliary/tgsi/tgsi_strings.c
index 26403508ec..7ce12d3655 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_strings.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_strings.c
@@ -151,6 +151,7 @@ const char *tgsi_property_names[TGSI_PROPERTY_COUNT] =
    "NUM_CLIPDIST_ENABLED",
    "NUM_CULLDIST_ENABLED",
    "FS_EARLY_DEPTH_STENCIL",
+   "FS_POST_DEPTH_COVERAGE",
    "NEXT_SHADER",
    "CS_FIXED_BLOCK_WIDTH",
    "CS_FIXED_BLOCK_HEIGHT",
diff --git a/src/gallium/docs/source/tgsi.rst b/src/gallium/docs/source/tgsi.rst
index e740476ff0..eceaa6d64f 100644
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -3720,6 +3720,13 @@ DP3, DP4, DPH, DST, LOG, LRP, XPD, and possibly others. If there is a
 mismatch between shaders, then it is unspecified whether this behavior
 will be enabled.
 
+FS_POST_DEPTH_COVERAGE
+""""""""""""""""""""""
+
+When enabled, the input for TGSI_SEMANTIC_SAMPLEMASK will exclude samples
+that have failed the depth/stencil tests. This is only valid when
+FS_EARLY_DEPTH_STENCIL is also specified.
+
 
 Texture Sampling and Texture Formats
 ------------------------------------
diff --git a/src/gallium/include/pipe/p_shader_tokens.h b/src/gallium/include/pipe/p_shader_tokens.h
index cb49e3b033..1e08d97329 100644
--- a/src/gallium/include/pipe/p_shader_tokens.h
+++ b/src/gallium/include/pipe/p_shader_tokens.h
@@ -293,6 +293,7 @@ enum tgsi_property_name {
    TGSI_PROPERTY_NUM_CLIPDIST_ENABLED,
    TGSI_PROPERTY_NUM_CULLDIST_ENABLED,
    TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL,
+   TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE,
    TGSI_PROPERTY_NEXT_SHADER,
    TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH,
    TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT,