Mesa (gallium-winsys-private): nv20: Z-mapping parameters
Jose Fonseca
jrfonseca at kemper.freedesktop.org
Mon Feb 2 11:41:33 UTC 2009
Module: Mesa
Branch: gallium-winsys-private
Commit: 9116f9408ed373109cbf7d25998692846f2e2ef3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=9116f9408ed373109cbf7d25998692846f2e2ef3
Author: Pekka Paalanen <pq at iki.fi>
Date: Sat Jan 31 14:39:08 2009 +0200
nv20: Z-mapping parameters
Based on my renouveau dump, adjust initial hw state related to Z-mapping,
and add one unknown depth reg into depth/stencil/alpha emission.
Now trivial/tri-z on nv20 looks identical to swrast rendered one.
Signed-off-by: Pekka Paalanen <pq at iki.fi>
---
src/gallium/drivers/nv20/nv20_context.c | 22 +++++++++++-----------
src/gallium/drivers/nv20/nv20_state_emit.c | 3 +++
2 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/src/gallium/drivers/nv20/nv20_context.c b/src/gallium/drivers/nv20/nv20_context.c
index c8fb690..877ef5d 100644
--- a/src/gallium/drivers/nv20/nv20_context.c
+++ b/src/gallium/drivers/nv20/nv20_context.c
@@ -349,7 +349,7 @@ static void nv20_init_hwctx(struct nv20_context *nv20)
memset(projectionmatrix, 0, sizeof(projectionmatrix));
projectionmatrix[0*4+0] = 1.0;
projectionmatrix[1*4+1] = 1.0;
- projectionmatrix[2*4+2] = 1.0;
+ projectionmatrix[2*4+2] = 16777215.0;
projectionmatrix[3*4+3] = 1.0;
BEGIN_RING(kelvin, NV20TCL_PROJECTION_MATRIX(0), 16);
for (i = 0; i < 16; i++) {
@@ -357,20 +357,20 @@ static void nv20_init_hwctx(struct nv20_context *nv20)
}
BEGIN_RING(kelvin, NV20TCL_DEPTH_RANGE_NEAR, 2);
- OUT_RINGf (0.0);
- OUT_RINGf (16777216.0); /* bpp dependant? */
+ OUT_RINGf (0.0);
+ OUT_RINGf (16777216.0); /* [0, 1] scaled approx to [0, 2^24] */
BEGIN_RING(kelvin, NV20TCL_VIEWPORT_SCALE0_X, 4);
- OUT_RINGf (0.0); /* x-offset */
- OUT_RINGf (0.0); /* y-offset */
- OUT_RINGf (16777215.0 * 0.5);
- OUT_RING (0);
+ OUT_RINGf (0.0); /* x-offset, w/2 + 1.031250 */
+ OUT_RINGf (0.0); /* y-offset, h/2 + 0.030762 */
+ OUT_RINGf (0.0);
+ OUT_RINGf (16777215.0);
BEGIN_RING(kelvin, NV20TCL_VIEWPORT_SCALE1_X, 4);
- OUT_RINGf (0.0); /* no effect? */
- OUT_RINGf (0.0); /* no effect? */
- OUT_RINGf (16777215.0 * 0.5);
- OUT_RINGf (65535.0);
+ OUT_RINGf (0.0); /* no effect?, w/2 */
+ OUT_RINGf (0.0); /* no effect?, h/2 */
+ OUT_RINGf (16777215.0 * 0.5);
+ OUT_RINGf (65535.0);
FIRE_RING (NULL);
}
diff --git a/src/gallium/drivers/nv20/nv20_state_emit.c b/src/gallium/drivers/nv20/nv20_state_emit.c
index cbdc674..5d5f4cd 100644
--- a/src/gallium/drivers/nv20/nv20_state_emit.c
+++ b/src/gallium/drivers/nv20/nv20_state_emit.c
@@ -73,6 +73,9 @@ static void nv20_state_emit_dsa(struct nv20_context* nv20)
BEGIN_RING(kelvin, NV20TCL_DEPTH_TEST_ENABLE, 1);
OUT_RING (d->depth.test_enable);
+ BEGIN_RING(kelvin, NV20TCL_DEPTH_UNK17D8, 1);
+ OUT_RING (1);
+
#if 0
BEGIN_RING(kelvin, NV20TCL_STENCIL_ENABLE, 1);
OUT_RING (d->stencil.enable);
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