diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_stencil.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_stencil.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_stencil.c b/src/mesa/state_tracker/st_atom_stencil.c new file mode 100644 index 0000000000..32610c3d24 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_stencil.c @@ -0,0 +1,140 @@ +/************************************************************************** + * + * 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 stencil func tokens to softpipe tokens. + */ +static GLuint +gl_stencil_func_to_sp(GLenum func) +{ + /* Same values, just biased */ + assert(SP_STENCIL_FUNC_NEVER == GL_NEVER - GL_NEVER); + assert(SP_STENCIL_FUNC_LESS == GL_LESS - GL_NEVER); + assert(SP_STENCIL_FUNC_EQUAL == GL_EQUAL - GL_NEVER); + assert(SP_STENCIL_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER); + assert(SP_STENCIL_FUNC_GREATER == GL_GREATER - GL_NEVER); + assert(SP_STENCIL_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER); + assert(SP_STENCIL_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER); + assert(SP_STENCIL_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER); + assert(func >= GL_NEVER); + assert(func <= GL_ALWAYS); + return func - GL_NEVER; +} + + +/** + * Convert GLenum stencil op tokens to softpipe tokens. + */ +static GLuint +gl_stencil_op_to_sp(GLenum func) +{ + switch (func) { + case GL_KEEP: + return SP_STENCIL_OP_KEEP; + case GL_ZERO: + return SP_STENCIL_OP_ZERO; + case GL_REPLACE: + return SP_STENCIL_OP_REPLACE; + case GL_INCR: + return SP_STENCIL_OP_INCR; + case GL_DECR: + return SP_STENCIL_OP_DECR; + case GL_INCR_WRAP: + return SP_STENCIL_OP_INCR_WRAP; + case GL_DECR_WRAP: + return SP_STENCIL_OP_DECR_WRAP; + case GL_INVERT: + return SP_STENCIL_OP_INVERT; + default: + assert("invalid GL token in gl_stencil_op_to_sp()" == NULL); + return 0; + } +} + + +static void +update_stencil( struct st_context *st ) +{ + struct softpipe_stencil_state stencil; + + memset(&stencil, 0, sizeof(stencil)); + + if (st->ctx->Stencil.Enabled) { + stencil.front_enabled = 1; + stencil.front_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[0]); + stencil.front_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[0]); + stencil.front_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[0]); + stencil.front_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[0]); + stencil.ref_value[0] = st->ctx->Stencil.Ref[0] & 0xff; + stencil.value_mask[0] = st->ctx->Stencil.ValueMask[0] & 0xff; + stencil.write_mask[0] = st->ctx->Stencil.WriteMask[0] & 0xff; + if (st->ctx->Stencil.TestTwoSide) { + stencil.back_enabled = 1; + stencil.back_func = gl_stencil_func_to_sp(st->ctx->Stencil.Function[1]); + stencil.back_fail_op = gl_stencil_op_to_sp(st->ctx->Stencil.FailFunc[1]); + stencil.back_zfail_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZFailFunc[1]); + stencil.back_zpass_op = gl_stencil_op_to_sp(st->ctx->Stencil.ZPassFunc[1]); + stencil.ref_value[1] = st->ctx->Stencil.Ref[1] & 0xff; + stencil.value_mask[1] = st->ctx->Stencil.ValueMask[1] & 0xff; + stencil.write_mask[1] = st->ctx->Stencil.WriteMask[1] & 0xff; + } + stencil.clear_value = st->ctx->Stencil.Clear & 0xff; + } + + if (memcmp(&stencil, &st->state.stencil, sizeof(stencil)) != 0) { + /* state has changed */ + st->state.stencil = stencil; /* struct copy */ + st->softpipe->set_stencil_state(st->softpipe, &stencil); /* set new state */ + } +} + + +const struct st_tracked_state st_update_stencil = { + .dirty = { + .mesa = (_NEW_STENCIL), + .st = 0, + }, + .update = update_stencil +}; + + + + + |