[Mesa-dev] [PATCH 2/2] st/mesa: add support for gl_ClipDistance

[Bryan Cain]

---
 src/mesa/state_tracker/st_glsl_to_tgsi.cpp |    1 +
 src/mesa/state_tracker/st_program.c        |   18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 9ef65c8..d50176d 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -5036,6 +5036,7 @@ st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog)
 	   || progress;
 
          progress = lower_quadop_vector(ir, false) || progress;
+         progress = lower_clip_distance(ir) || progress;
 
          if (options->MaxIfDepth == 0)
             progress = lower_discard(ir) || progress;
diff --git a/src/mesa/state_tracker/st_program.c b/src/mesa/state_tracker/st_program.c
index 04d3ef6..73581dd 100644
--- a/src/mesa/state_tracker/st_program.c
+++ b/src/mesa/state_tracker/st_program.c
@@ -244,6 +244,14 @@ st_prepare_vertex_program(struct gl_context *ctx,
             stvp->output_semantic_name[slot] = TGSI_SEMANTIC_PSIZE;
             stvp->output_semantic_index[slot] = 0;
             break;
+         case VERT_RESULT_CLIP_DIST0:
+            stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+            stvp->output_semantic_index[slot] = 0;
+            break;
+         case VERT_RESULT_CLIP_DIST1:
+            stvp->output_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+            stvp->output_semantic_index[slot] = 1;
+            break;
          case VERT_RESULT_EDGE:
             assert(0);
             break;
@@ -541,6 +549,16 @@ st_translate_fragment_program(struct st_context *st,
                input_semantic_index[slot] = 0;
                interpMode[slot] = TGSI_INTERPOLATE_CONSTANT;
                break;
+            case FRAG_ATTRIB_CLIP_DIST0:
+               input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+               input_semantic_index[slot] = 0;
+               interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
+               break;
+            case FRAG_ATTRIB_CLIP_DIST1:
+               input_semantic_name[slot] = TGSI_SEMANTIC_CLIPDIST;
+               input_semantic_index[slot] = 1;
+               interpMode[slot] = TGSI_INTERPOLATE_LINEAR;
+               break;
                /* In most cases, there is nothing special about these
                 * inputs, so adopt a convention to use the generic
                 * semantic name and the mesa FRAG_ATTRIB_ number as the
-- 
1.7.1