st/mesa: move point_size_per_vertex-logic to helper

Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 33 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_util.h b/src/mesa/state_tracker/st_util.h
index bae85974f0e..edb13a1f26f 100644
--- a/src/mesa/state_tracker/st_util.h
+++ b/src/mesa/state_tracker/st_util.h
@@ -101,6 +101,39 @@ st_user_clip_planes_enabled(struct gl_context *ctx)
           ctx->Transform.ClipPlanesEnabled;
 }
 
+static inline bool
+st_point_size_per_vertex(struct gl_context *ctx)
+{
+   const struct gl_program *vertProg = ctx->VertexProgram._Current;
+   if (vertProg) {
+      if (vertProg->Id == 0) {
+         if (vertProg->info.outputs_written &
+             BITFIELD64_BIT(VARYING_SLOT_PSIZ)) {
+            /* generated program which emits point size */
+            return true;
+         }
+      }
+      else if (ctx->API != API_OPENGLES2) {
+         /* PointSizeEnabled is always set in ES2 contexts */
+         return ctx->VertexProgram.PointSizeEnabled;
+      }
+      else {
+         /* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */
+         /* We have to check the last bound stage and see if it writes psize */
+         struct gl_program *last = NULL;
+         if (ctx->GeometryProgram._Current)
+            last = ctx->GeometryProgram._Current;
+         else if (ctx->TessEvalProgram._Current)
+            last = ctx->TessEvalProgram._Current;
+         else if (ctx->VertexProgram._Current)
+            last = ctx->VertexProgram._Current;
+         if (last)
+            return !!(last->info.outputs_written &
+                      BITFIELD64_BIT(VARYING_SLOT_PSIZ));
+      }
+   }
+   return false;
+}
 
 /** clear-alloc a struct-sized object, with casting */
 #define ST_CALLOC_STRUCT(T)   (struct T *) calloc(1, sizeof(struct T))