Mesa (master): r300g: implement depth clamp
Marek Olšák
mareko at kemper.freedesktop.org
Wed Jul 21 20:54:55 UTC 2010
Module: Mesa
Branch: master
Commit: ca7ead03da4481cd34933175898f4a924e588ad4
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ca7ead03da4481cd34933175898f4a924e588ad4
Author: Marek Olšák <maraeo at gmail.com>
Date: Tue Jul 20 16:37:22 2010 +0200
r300g: implement depth clamp
Depth clamping seems to be implicit if clipping is disabled.
It's not perfect, but it's good enough for wine and passes
the corresponding piglit tests.
---
src/gallium/drivers/r300/r300_screen.c | 1 +
src/gallium/drivers/r300/r300_state.c | 3 ++-
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 9c73ffc..5a11b98 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -115,6 +115,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
case PIPE_CAP_BLEND_EQUATION_SEPARATE:
case PIPE_CAP_TEXTURE_SWIZZLE:
+ case PIPE_CAP_DEPTH_CLAMP:
return 1;
/* Unsupported features (boolean caps). */
diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 0bbc022..f52265b 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -440,7 +440,8 @@ static void r300_set_clip_state(struct pipe_context* pipe,
OUT_CB_TABLE(state->ucp, state->nr * 4);
}
OUT_CB_REG(R300_VAP_CLIP_CNTL, ((1 << state->nr) - 1) |
- R300_PS_UCP_MODE_CLIP_AS_TRIFAN);
+ R300_PS_UCP_MODE_CLIP_AS_TRIFAN |
+ (state->depth_clamp ? R300_CLIP_DISABLE : 0));
END_CB;
r300->clip_state.dirty = TRUE;
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