diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_depth.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_depth.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_depth.c b/src/mesa/state_tracker/st_atom_depth.c new file mode 100644 index 0000000000..0e791ceb20 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_depth.c @@ -0,0 +1,151 @@ +/************************************************************************** + * + * 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 + * Zack Rusin + */ + + +#include "st_context.h" +#include "st_atom.h" +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "cso_cache/cso_context.h" + + +/** + * Convert an OpenGL compare mode to a pipe tokens. + */ +GLuint +st_compare_func_to_pipe(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; +} + + +/** + * Convert GLenum stencil op tokens to pipe tokens. + */ +static GLuint +gl_stencil_op_to_pipe(GLenum func) +{ + switch (func) { + case GL_KEEP: + return PIPE_STENCIL_OP_KEEP; + case GL_ZERO: + return PIPE_STENCIL_OP_ZERO; + case GL_REPLACE: + return PIPE_STENCIL_OP_REPLACE; + case GL_INCR: + return PIPE_STENCIL_OP_INCR; + case GL_DECR: + return PIPE_STENCIL_OP_DECR; + case GL_INCR_WRAP: + return PIPE_STENCIL_OP_INCR_WRAP; + case GL_DECR_WRAP: + return PIPE_STENCIL_OP_DECR_WRAP; + case GL_INVERT: + return PIPE_STENCIL_OP_INVERT; + default: + assert("invalid GL token in gl_stencil_op_to_pipe()" == NULL); + return 0; + } +} + +static void +update_depth_stencil_alpha(struct st_context *st) +{ + struct pipe_depth_stencil_alpha_state *dsa = &st->state.depth_stencil; + + memset(dsa, 0, sizeof(*dsa)); + + dsa->depth.enabled = st->ctx->Depth.Test; + dsa->depth.writemask = st->ctx->Depth.Mask; + dsa->depth.func = st_compare_func_to_pipe(st->ctx->Depth.Func); + + if (st->ctx->Query.CurrentOcclusionObject && + st->ctx->Query.CurrentOcclusionObject->Active) + dsa->depth.occlusion_count = 1; + + if (st->ctx->Stencil.Enabled && st->ctx->Visual.stencilBits > 0) { + dsa->stencil[0].enabled = 1; + dsa->stencil[0].func = st_compare_func_to_pipe(st->ctx->Stencil.Function[0]); + dsa->stencil[0].fail_op = gl_stencil_op_to_pipe(st->ctx->Stencil.FailFunc[0]); + dsa->stencil[0].zfail_op = gl_stencil_op_to_pipe(st->ctx->Stencil.ZFailFunc[0]); + dsa->stencil[0].zpass_op = gl_stencil_op_to_pipe(st->ctx->Stencil.ZPassFunc[0]); + dsa->stencil[0].ref_value = st->ctx->Stencil.Ref[0] & 0xff; + dsa->stencil[0].value_mask = st->ctx->Stencil.ValueMask[0] & 0xff; + dsa->stencil[0].write_mask = st->ctx->Stencil.WriteMask[0] & 0xff; + + if (st->ctx->Stencil._TestTwoSide) { + dsa->stencil[1].enabled = 1; + dsa->stencil[1].func = st_compare_func_to_pipe(st->ctx->Stencil.Function[1]); + dsa->stencil[1].fail_op = gl_stencil_op_to_pipe(st->ctx->Stencil.FailFunc[1]); + dsa->stencil[1].zfail_op = gl_stencil_op_to_pipe(st->ctx->Stencil.ZFailFunc[1]); + dsa->stencil[1].zpass_op = gl_stencil_op_to_pipe(st->ctx->Stencil.ZPassFunc[1]); + dsa->stencil[1].ref_value = st->ctx->Stencil.Ref[1] & 0xff; + dsa->stencil[1].value_mask = st->ctx->Stencil.ValueMask[1] & 0xff; + dsa->stencil[1].write_mask = st->ctx->Stencil.WriteMask[1] & 0xff; + } + else { + dsa->stencil[1] = dsa->stencil[0]; + dsa->stencil[1].enabled = 0; + } + } + + if (st->ctx->Color.AlphaEnabled) { + dsa->alpha.enabled = 1; + dsa->alpha.func = st_compare_func_to_pipe(st->ctx->Color.AlphaFunc); + dsa->alpha.ref = st->ctx->Color.AlphaRef; + } + + cso_set_depth_stencil_alpha(st->cso_context, dsa); +} + + +const struct st_tracked_state st_update_depth_stencil_alpha = { + "st_update_depth_stencil", /* name */ + { /* dirty */ + (_NEW_DEPTH|_NEW_STENCIL|_NEW_COLOR), /* mesa */ + 0, /* st */ + }, + update_depth_stencil_alpha /* update */ +}; 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