diff options
author | Brian <brian.paul@tungstengraphics.com> | 2007-05-30 16:07:27 -0600 |
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committer | Brian <brian.paul@tungstengraphics.com> | 2007-05-30 16:07:27 -0600 |
commit | 4c9b48dcc510929951516f3cd17b98654ac93a9a (patch) | |
tree | 5de66addceb0755f9ffde557f03625d282815960 | |
parent | 6fc596193370aba52ddb742c61a4687c7831897c (diff) |
depth(Z) state
-rw-r--r-- | src/mesa/softpipe/state_tracker/st_atom_depth.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/mesa/softpipe/state_tracker/st_atom_depth.c b/src/mesa/softpipe/state_tracker/st_atom_depth.c new file mode 100644 index 0000000000..5532abc8fd --- /dev/null +++ b/src/mesa/softpipe/state_tracker/st_atom_depth.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. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + * Brian Paul + */ + + +#include "st_context.h" +#include "st_atom.h" +#include "softpipe/sp_context.h" +#include "softpipe/sp_defines.h" + + +/** + * Convert GLenum depth func tokens to softpipe tokens. + */ +static GLuint +gl_depth_func_to_sp(GLenum func) +{ + /* Same values, just biased */ + assert(SP_DEPTH_FUNC_NEVER == GL_NEVER - GL_NEVER); + assert(SP_DEPTH_FUNC_LESS == GL_LESS - GL_NEVER); + assert(SP_DEPTH_FUNC_EQUAL == GL_EQUAL - GL_NEVER); + assert(SP_DEPTH_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER); + assert(SP_DEPTH_FUNC_GREATER == GL_GREATER - GL_NEVER); + assert(SP_DEPTH_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER); + assert(SP_DEPTH_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER); + assert(SP_DEPTH_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER); + assert(func >= GL_NEVER); + assert(func <= GL_ALWAYS); + return func - GL_NEVER; +} + + +static void +update_depth( struct st_context *st ) +{ + struct softpipe_depth_state depth; + + memset(&depth, 0, sizeof(depth)); + + depth.enabled = st->ctx->Depth.Test; + depth.writemask = st->ctx->Depth.Mask; + depth.func = gl_depth_func_to_sp(st->ctx->Depth.Func); + depth.clear = st->ctx->Depth.Clear; + + if (memcmp(&depth, &st->state.depth, sizeof(depth)) != 0) { + /* state has changed */ + st->state.depth = depth; /* struct copy */ + st->softpipe->set_depth_state(st->softpipe, &depth); /* set new state */ + } +} + + +const struct st_tracked_state st_update_depth = { + .dirty = { + .mesa = (_NEW_DEPTH), + .st = 0, + }, + .update = update_depth +}; |