From b9889517f5e7eceb14bd103bbdff9ff47ce6ed25 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Wed, 29 Jul 2009 16:27:03 -0600 Subject: 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. --- src/gallium/auxiliary/tgsi/tgsi_sse2.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/gallium/auxiliary/tgsi') 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; -- cgit v1.2.3