diff options
author | Keith Whitwell <keith@tungstengraphics.com> | 2008-02-15 11:15:47 +0000 |
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committer | Keith Whitwell <keith@tungstengraphics.com> | 2008-02-15 11:15:47 +0000 |
commit | 6ac2c1cc0cd1253ba2014d459010032127f185ec (patch) | |
tree | 6348de9de19e7394800a983c8c614566d22b870b /src/gallium/drivers/softpipe/sp_quad_earlyz.c | |
parent | c04a7f8929d674971a472ffa4d3a31200c22aa5a (diff) | |
parent | 6d3831b11d9f5aaba61cc2fb8ade61437ad7c335 (diff) |
Merge commit 'origin/gallium-0.1' into gallium-0.1
Conflicts:
src/gallium/drivers/softpipe/sp_quad_fs.c
src/gallium/drivers/softpipe/sp_state.h
src/gallium/drivers/softpipe/sp_state_fs.c
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_quad_earlyz.c')
-rw-r--r-- | src/gallium/drivers/softpipe/sp_quad_earlyz.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_quad_earlyz.c b/src/gallium/drivers/softpipe/sp_quad_earlyz.c new file mode 100644 index 0000000000..22ea99049f --- /dev/null +++ b/src/gallium/drivers/softpipe/sp_quad_earlyz.c @@ -0,0 +1,88 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +/** + * \brief Quad early-z testing + */ + +#include "pipe/p_defines.h" +#include "pipe/p_util.h" +#include "sp_headers.h" +#include "sp_quad.h" + + +/** + * All this stage does is compute the quad's Z values (which is normally + * done by the shading stage). + * The next stage will do the actual depth test. + */ +static void +earlyz_quad( + struct quad_stage *qs, + struct quad_header *quad ) +{ + const float fx = (float) quad->x0; + const float fy = (float) quad->y0; + const float dzdx = quad->posCoef->dadx[2]; + const float dzdy = quad->posCoef->dady[2]; + const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy; + + quad->outputs.depth[0] = z0; + quad->outputs.depth[1] = z0 + dzdx; + quad->outputs.depth[2] = z0 + dzdy; + quad->outputs.depth[3] = z0 + dzdx + dzdy; + + qs->next->run( qs->next, quad ); +} + +static void +earlyz_begin( + struct quad_stage *qs ) +{ + qs->next->begin( qs->next ); +} + +static void +earlyz_destroy( + struct quad_stage *qs ) +{ + FREE( qs ); +} + +struct quad_stage * +sp_quad_earlyz_stage( + struct softpipe_context *softpipe ) +{ + struct quad_stage *stage = CALLOC_STRUCT( quad_stage ); + + stage->softpipe = softpipe; + stage->begin = earlyz_begin; + stage->run = earlyz_quad; + stage->destroy = earlyz_destroy; + + return stage; +} |