i965/vec4: Make a function for setting up vec4 program key clip info.

This functionality will need to be reused by geometry shaders.

Reviewed-by: Ian Romanick <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Matt Turner <[email protected]>

2 files changed, 24 insertions, 6 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 60dab488450..e4a1886325e 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -125,6 +125,7 @@ extern "C" {
 struct brw_context;
 struct brw_instruction;
 struct brw_vs_prog_key;
+struct brw_vec4_prog_key;
 struct brw_wm_prog_key;
 struct brw_wm_prog_data;
 
@@ -1586,6 +1587,11 @@ gen7_emit_depth_stencil_hiz(struct brw_context *brw,
 
 extern const GLuint prim_to_hw_prim[GL_POLYGON+1];
 
+void
+brw_setup_vec4_key_clip_info(struct brw_context *brw,
+                             struct brw_vec4_prog_key *key,
+                             bool program_uses_clip_distance);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/mesa/drivers/dri/i965/brw_vs.c b/src/mesa/drivers/dri/i965/brw_vs.c
index f1ff14166ef..0a3924fddf4 100644
--- a/src/mesa/drivers/dri/i965/brw_vs.c
+++ b/src/mesa/drivers/dri/i965/brw_vs.c
@@ -381,6 +381,23 @@ brw_vs_debug_recompile(struct brw_context *brw,
    }
 }
 
+
+void
+brw_setup_vec4_key_clip_info(struct brw_context *brw,
+                             struct brw_vec4_prog_key *key,
+                             bool program_uses_clip_distance)
+{
+   struct gl_context *ctx = &brw->ctx;
+
+   key->userclip_active = (ctx->Transform.ClipPlanesEnabled != 0);
+   key->uses_clip_distance = program_uses_clip_distance;
+   if (key->userclip_active && !key->uses_clip_distance) {
+      key->nr_userclip_plane_consts
+         = _mesa_logbase2(ctx->Transform.ClipPlanesEnabled) + 1;
+   }
+}
+
+
 static void brw_upload_vs_prog(struct brw_context *brw)
 {
    struct gl_context *ctx = &brw->ctx;
@@ -397,12 +414,7 @@ static void brw_upload_vs_prog(struct brw_context *brw)
     * the inputs it asks for, whether they are varying or not.
     */
    key.base.program_string_id = vp->id;
-   key.base.userclip_active = (ctx->Transform.ClipPlanesEnabled != 0);
-   key.base.uses_clip_distance = vp->program.UsesClipDistance;
-   if (key.base.userclip_active && !key.base.uses_clip_distance) {
-      key.base.nr_userclip_plane_consts
-         = _mesa_logbase2(ctx->Transform.ClipPlanesEnabled) + 1;
-   }
+   brw_setup_vec4_key_clip_info(brw, &key.base, vp->program.UsesClipDistance);
 
    /* _NEW_POLYGON */
    if (brw->gen < 6) {