diff options
Diffstat (limited to 'src/mesa/state_tracker')
-rw-r--r-- | src/mesa/state_tracker/st_atom_alphatest.c | 94 | ||||
-rw-r--r-- | src/mesa/state_tracker/st_context.h | 1 |
2 files changed, 95 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_alphatest.c b/src/mesa/state_tracker/st_atom_alphatest.c new file mode 100644 index 0000000000..b7cc0d70a9 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_alphatest.c @@ -0,0 +1,94 @@ +/************************************************************************** + * + * 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 "pipe/p_context.h" +#include "pipe/p_defines.h" + + +/** + * Convert GLenum stencil func tokens to pipe tokens. + */ +static GLuint +gl_alpha_func_to_sp(GLenum func) +{ + /* Same values, just biased */ + assert(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER); + assert(PIPE_FUNC_LESS == GL_LESS - GL_NEVER); + assert(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER); + assert(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER); + assert(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER); + assert(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER); + assert(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER); + assert(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER); + assert(func >= GL_NEVER); + assert(func <= GL_ALWAYS); + return func - GL_NEVER; +} + + +static void +update_alpha_test( struct st_context *st ) +{ + struct pipe_alpha_test_state alpha; + + memset(&alpha, 0, sizeof(alpha)); + + if (st->ctx->Color.AlphaEnabled) { + alpha.enable = 1; + alpha.func = gl_alpha_func_to_sp(st->ctx->Color.AlphaFunc); + alpha.ref = st->ctx->Color.AlphaRef; + } + + if (memcmp(&alpha, &st->state.alpha_test, sizeof(alpha)) != 0) { + /* state has changed */ + st->state.alpha_test = alpha; /* struct copy */ + st->pipe->set_alpha_test_state(st->pipe, &alpha); /* set new state */ + } +} + + +const struct st_tracked_state st_update_alpha_test = { + .dirty = { + .mesa = (_NEW_COLOR), + .st = 0, + }, + .update = update_alpha_test +}; + + + + + diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h index b43fc0925b..d98dd3aada 100644 --- a/src/mesa/state_tracker/st_context.h +++ b/src/mesa/state_tracker/st_context.h @@ -69,6 +69,7 @@ struct st_context struct pipe_viewport viewport; struct pipe_setup_state setup; struct pipe_fs_state fs; + struct pipe_alpha_test_state alpha_test; struct pipe_blend_state blend; struct pipe_surface cbuf; struct pipe_clip_state clip; |