Taken from the intel driver. The sample positions are actually a solution
to the 8 queens puzzle. It gives more accurate and smoother AA.
---
src/gallium/drivers/r600/evergreen_state.c | 18 +++++++++---------
src/gallium/drivers/r600/r600_state.c | 6 +++---
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/src/gallium/drivers/r600/evergreen_state.c
b/src/gallium/drivers/r600/evergreen_state.c
index 17b7e9d..ab9a7a5 100644
--- a/src/gallium/drivers/r600/evergreen_state.c
+++ b/src/gallium/drivers/r600/evergreen_state.c
@@ -1723,16 +1723,16 @@ static void evergreen_emit_msaa_state(struct
r600_context *rctx, int nr_samples)
static unsigned max_dist_4x = 6;
/* 8xMSAA */
static uint32_t sample_locs_8x[] = {
- FILL_SREG(-2, -5, 3, -4, -1, 5, -6, -2),
- FILL_SREG( 6, 0, 0, 0, -5, 3, 4, 4),
- FILL_SREG(-2, -5, 3, -4, -1, 5, -6, -2),
- FILL_SREG( 6, 0, 0, 0, -5, 3, 4, 4),
- FILL_SREG(-2, -5, 3, -4, -1, 5, -6, -2),
- FILL_SREG( 6, 0, 0, 0, -5, 3, 4, 4),
- FILL_SREG(-2, -5, 3, -4, -1, 5, -6, -2),
- FILL_SREG( 6, 0, 0, 0, -5, 3, 4, 4),
+ FILL_SREG(-1, 1, 1, 5, 3, -5, 5, 3),
+ FILL_SREG(-7, -1, -3, -7, 7, -3, -5, 7),
+ FILL_SREG(-1, 1, 1, 5, 3, -5, 5, 3),
+ FILL_SREG(-7, -1, -3, -7, 7, -3, -5, 7),
+ FILL_SREG(-1, 1, 1, 5, 3, -5, 5, 3),
+ FILL_SREG(-7, -1, -3, -7, 7, -3, -5, 7),
+ FILL_SREG(-1, 1, 1, 5, 3, -5, 5, 3),
+ FILL_SREG(-7, -1, -3, -7, 7, -3, -5, 7),
};
- static unsigned max_dist_8x = 8;
+ static unsigned max_dist_8x = 7;
struct radeon_winsys_cs *cs = rctx->cs;
unsigned max_dist = 0;
diff --git a/src/gallium/drivers/r600/r600_state.c
b/src/gallium/drivers/r600/r600_state.c
index 1a8d55e..607a89e 100644
--- a/src/gallium/drivers/r600/r600_state.c
+++ b/src/gallium/drivers/r600/r600_state.c
@@ -1587,10 +1587,10 @@ static void r600_emit_msaa_state(struct r600_context
*rctx, int nr_samples)
};
static unsigned max_dist_4x = 6;
static uint32_t sample_locs_8x[] = {
- FILL_SREG(-2, -5, 3, -4, -1, 5, -6, -2),
- FILL_SREG( 6, 0, 0, 0, -5, 3, 4, 4),
+ FILL_SREG(-1, 1, 1, 5, 3, -5, 5, 3),
+ FILL_SREG(-7, -1, -3, -7, 7, -3, -5, 7),
};
- static unsigned max_dist_8x = 8;
+ static unsigned max_dist_8x = 7;
struct radeon_winsys_cs *cs = rctx->cs;
unsigned max_dist = 0;
--
1.7.9.5
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