Signed-off-by: Chris Forbes <chr...@ijw.co.nz>
---
src/mesa/program/program.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/mesa/program/program.c b/src/mesa/program/program.c
index 01f8c6f..cdf1c03 100644
--- a/src/mesa/program/program.c
+++ b/src/mesa/program/program.c
@@ -1049,6 +1049,14 @@ _mesa_get_min_invocations_per_fragment(struct gl_context
*ctx,
* has no effect."
*/
if (ctx->Multisample.Enabled) {
+ /* The ARB_gpu_shader5 specification says:
+ *
+ * "Use of the "sample" qualifier on a fragment shader input
+ * forces per-sample shading"
+ */
+ if (prog->IsSample)
+ return MAX2(ctx->DrawBuffer->Visual.samples, 1);
+
if (prog->Base.SystemValuesRead & (SYSTEM_BIT_SAMPLE_ID |
SYSTEM_BIT_SAMPLE_POS))
return MAX2(ctx->DrawBuffer->Visual.samples, 1);
--
1.8.4.2
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