Mesa (master): i965: Claim to support 4 multisamples on gen6+.
Eric Anholt
anholt at kemper.freedesktop.org
Wed Jan 11 00:44:50 UTC 2012
Module: Mesa
Branch: master
Commit: be4e46b21a60cfdc826bf89d1078df54966115b1
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=be4e46b21a60cfdc826bf89d1078df54966115b1
Author: Eric Anholt <eric at anholt.net>
Date: Mon Jan 9 16:39:28 2012 -0800
i965: Claim to support 4 multisamples on gen6+.
We're not quite ready to actually support it in the implementation,
but at least this allows GL 3.0 API-reliant applications to hopefully
run successfully, though they won't get multisampling.
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_context.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 087e5a2..558e077 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -208,6 +208,14 @@ brwCreateContext(int api,
ctx->Const.MaxTransformFeedbackSeparateComponents =
BRW_MAX_SOL_BINDINGS / BRW_MAX_SOL_BUFFERS;
+ /* Claim to support 4 multisamples, even though we don't. This is a
+ * requirement for GL 3.0 that we missed until the last minute. Go ahead and
+ * claim the limit, so that usage of the 4 multisample-based API that is
+ * guaranteed in 3.0 succeeds, even though we only rasterize a single sample.
+ */
+ if (intel->gen >= 6)
+ ctx->Const.MaxSamples = 4;
+
/* if conformance mode is set, swrast can handle any size AA point */
ctx->Const.MaxPointSizeAA = 255.0;
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