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-rw-r--r--src/glsl/link_varyings.cpp18
1 files changed, 16 insertions, 2 deletions
diff --git a/src/glsl/link_varyings.cpp b/src/glsl/link_varyings.cpp
index a738e2f3825..1866ab265f2 100644
--- a/src/glsl/link_varyings.cpp
+++ b/src/glsl/link_varyings.cpp
@@ -1456,7 +1456,22 @@ assign_varying_locations(struct gl_context *ctx,
if (var && var->data.mode == ir_var_shader_in &&
var->data.is_unmatched_generic_inout) {
- if (prog->Version <= 120) {
+ if (prog->IsES) {
+ /*
+ * On Page 91 (Page 97 of the PDF) of the GLSL ES 1.0 spec:
+ *
+ * If the vertex shader declares but doesn't write to a
+ * varying and the fragment shader declares and reads it,
+ * is this an error?
+ *
+ * RESOLUTION: No.
+ */
+ linker_warning(prog, "%s shader varying %s not written "
+ "by %s shader\n.",
+ _mesa_shader_stage_to_string(consumer->Stage),
+ var->name,
+ _mesa_shader_stage_to_string(producer->Stage));
+ } else if (prog->Version <= 120) {
/* On page 25 (page 31 of the PDF) of the GLSL 1.20 spec:
*
* Only those varying variables used (i.e. read) in
@@ -1469,7 +1484,6 @@ assign_varying_locations(struct gl_context *ctx,
* write the variable for the FS to read it. See
* "glsl1-varying read but not written" in piglit.
*/
-
linker_error(prog, "%s shader varying %s not written "
"by %s shader\n.",
_mesa_shader_stage_to_string(consumer->Stage),