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/mesa/state_tracker/st_mesa_to_tgsi.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'src/mesa/state_tracker') diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c index 6380cd6b2a..c8fb39d558 100644 --- a/src/mesa/state_tracker/st_mesa_to_tgsi.c +++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c @@ -158,12 +158,6 @@ map_texture_target( GLuint textarget, GLboolean shadow ) { -#if 1 - /* XXX remove this line after we've checked that the rest of gallium - * can handle the TGSI_TEXTURE_SHADOWx tokens. - */ - shadow = GL_FALSE; -#endif switch( textarget ) { case TEXTURE_1D_INDEX: if (shadow) -- cgit v1.2.3