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-rw-r--r--src/mesa/state_tracker/st_atom_shader.c7
-rw-r--r--src/mesa/state_tracker/st_glsl_to_tgsi.cpp4
-rw-r--r--src/mesa/state_tracker/st_mesa_to_tgsi.c4
3 files changed, 10 insertions, 5 deletions
diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c
index 6515a98a3fb..73768ed1237 100644
--- a/src/mesa/state_tracker/st_atom_shader.c
+++ b/src/mesa/state_tracker/st_atom_shader.c
@@ -149,7 +149,12 @@ update_vp( struct st_context *st )
key.passthrough_edgeflags = st->vertdata_edgeflags;
key.clamp_color = st->clamp_vert_color_in_shader &&
- st->ctx->Light._ClampVertexColor;
+ st->ctx->Light._ClampVertexColor &&
+ (stvp->Base.Base.OutputsWritten &
+ (VARYING_SLOT_COL0 |
+ VARYING_SLOT_COL1 |
+ VARYING_SLOT_BFC0 |
+ VARYING_SLOT_BFC1));
st->vp_variant = st_get_vp_variant(st, stvp, &key);
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index c3d77933706..98ab2c149f5 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -4412,8 +4412,8 @@ translate_dst(struct st_translate *t,
/* Clamp colors for ARB_color_buffer_float. */
switch (t->procType) {
case TGSI_PROCESSOR_VERTEX:
- /* XXX if the geometry shader is present, this must be done there
- * instead of here. */
+ /* This can only occur with a compatibility profile, which doesn't
+ * support geometry shaders. */
if (dst_reg->index == VARYING_SLOT_COL0 ||
dst_reg->index == VARYING_SLOT_COL1 ||
dst_reg->index == VARYING_SLOT_BFC0 ||
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c
index 2c9d9a523f4..3dd8a14b657 100644
--- a/src/mesa/state_tracker/st_mesa_to_tgsi.c
+++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c
@@ -299,8 +299,8 @@ translate_dst( struct st_translate *t,
/* Clamp colors for ARB_color_buffer_float. */
switch (t->procType) {
case TGSI_PROCESSOR_VERTEX:
- /* XXX if the geometry shader is present, this must be done there
- * instead of here. */
+ /* This can only occur with a compatibility profile, which doesn't
+ * support geometry shaders. */
if (DstReg->Index == VARYING_SLOT_COL0 ||
DstReg->Index == VARYING_SLOT_COL1 ||
DstReg->Index == VARYING_SLOT_BFC0 ||