diff options
| author | Brian Paul <brianp@vmware.com> | 2009-07-29 16:27:03 -0600 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-07-29 16:33:58 -0600 |
| commit | b9889517f5e7eceb14bd103bbdff9ff47ce6ed25 (patch) | |
| tree | 3ce1520391909f877eefa91c9b1b464fac5d2b37 /src/gallium/auxiliary/tgsi/tgsi_sse2.c | |
| parent | 9c4c9f2837e08c5f69bc0d12bce7a656b2291837 (diff) | |
gallium: fix SSE shadow texture instructions
When sampling a 2D shadow map we need 3 texcoord components, not 2.
The third component (distance from light source) is compared against
the texture sample to return the result (visible vs. occluded).
Also, enable proper handling of TGSI_TEXTURE_SHADOW targets in Mesa->TGSI
translation. There's a possibility for breakage in gallium drivers if
they fail to handle the TGSI_TEXTURE_SHADOW1D / TGSI_TEXTURE_SHADOW2D /
TGSI_TEXTURE_SHADOWRECT texture targets for TGSI_OPCODE_TEX/TXP instructions,
but that should be easy to fix.
With these changes, progs/demos/shadowtex.c renders properly again with
softpipe.
Diffstat (limited to 'src/gallium/auxiliary/tgsi/tgsi_sse2.c')
| -rw-r--r-- | src/gallium/auxiliary/tgsi/tgsi_sse2.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/tgsi/tgsi_sse2.c b/src/gallium/auxiliary/tgsi/tgsi_sse2.c index 781ea1e75c..16848f7cc5 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_sse2.c +++ b/src/gallium/auxiliary/tgsi/tgsi_sse2.c @@ -1467,15 +1467,15 @@ emit_tex( struct x86_function *func, switch (inst->InstructionExtTexture.Texture) { case TGSI_TEXTURE_1D: - case TGSI_TEXTURE_SHADOW1D: count = 1; break; case TGSI_TEXTURE_2D: case TGSI_TEXTURE_RECT: - case TGSI_TEXTURE_SHADOW2D: - case TGSI_TEXTURE_SHADOWRECT: count = 2; break; + case TGSI_TEXTURE_SHADOW1D: + case TGSI_TEXTURE_SHADOW2D: + case TGSI_TEXTURE_SHADOWRECT: case TGSI_TEXTURE_3D: case TGSI_TEXTURE_CUBE: count = 3; |