diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_shader.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_shader.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c new file mode 100644 index 0000000000..ad151edf3b --- /dev/null +++ b/src/mesa/state_tracker/st_atom_shader.c @@ -0,0 +1,224 @@ +/************************************************************************** + * + * Copyright 2003 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. + * + **************************************************************************/ + +/** + * State validation for vertex/fragment shaders. + * Note that we have to delay most vertex/fragment shader translation + * until rendering time since the linkage between the vertex outputs and + * fragment inputs can vary depending on the pairing of shaders. + * + * Authors: + * Brian Paul + */ + +#include "main/imports.h" +#include "main/mtypes.h" +#include "shader/program.h" + +#include "pipe/p_context.h" +#include "pipe/p_shader_tokens.h" + +#include "util/u_simple_shaders.h" + +#include "cso_cache/cso_context.h" + +#include "st_context.h" +#include "st_atom.h" +#include "st_program.h" + + + +/** + * Translate fragment program if needed. + */ +static void +translate_fp(struct st_context *st, + struct st_fragment_program *stfp) +{ + if (!stfp->tgsi.tokens) { + assert(stfp->Base.Base.NumInstructions > 0); + + st_translate_fragment_program(st, stfp); + } +} + + + +/** + * Find a translated vertex program that corresponds to stvp and + * has outputs matched to stfp's inputs. + * This performs vertex and fragment translation (to TGSI) when needed. + */ +static struct st_vp_varient * +find_translated_vp(struct st_context *st, + struct st_vertex_program *stvp ) +{ + struct st_vp_varient *vpv; + struct st_vp_varient_key key; + + /* Nothing in our key yet. This will change: + */ + memset(&key, 0, sizeof key); + + /* When this is true, we will add an extra input to the vertex + * shader translation (for edgeflags), an extra output with + * edgeflag semantics, and extend the vertex shader to pass through + * the input to the output. We'll need to use similar logic to set + * up the extra vertex_element input for edgeflags. + * _NEW_POLYGON, ST_NEW_EDGEFLAGS_DATA + */ + key.passthrough_edgeflags = (st->vertdata_edgeflags && ( + st->ctx->Polygon.FrontMode != GL_FILL || + st->ctx->Polygon.BackMode != GL_FILL)); + + + /* Do we need to throw away old translations after a change in the + * GL program string? + */ + if (stvp->serialNo != stvp->lastSerialNo) { + /* These may have changed if the program string changed. + */ + st_prepare_vertex_program( st, stvp ); + + /* We are now up-to-date: + */ + stvp->lastSerialNo = stvp->serialNo; + } + + /* See if we've got a translated vertex program whose outputs match + * the fragment program's inputs. + */ + for (vpv = stvp->varients; vpv; vpv = vpv->next) { + if (memcmp(&vpv->key, &key, sizeof key) == 0) { + break; + } + } + + /* No? Perform new translation here. */ + if (!vpv) { + vpv = st_translate_vertex_program(st, stvp, &key); + if (!vpv) + return NULL; + + vpv->next = stvp->varients; + stvp->varients = vpv; + } + + return vpv; +} + + +/** + * Return pointer to a pass-through fragment shader. + * This shader is used when a texture is missing/incomplete. + */ +static void * +get_passthrough_fs(struct st_context *st) +{ + if (!st->passthrough_fs) { + st->passthrough_fs = + util_make_fragment_passthrough_shader(st->pipe); + } + + return st->passthrough_fs; +} + + +/** + * Update fragment program state/atom. This involves translating the + * Mesa fragment program into a gallium fragment program and binding it. + */ +static void +update_fp( struct st_context *st ) +{ + struct st_fragment_program *stfp; + + assert(st->ctx->FragmentProgram._Current); + stfp = st_fragment_program(st->ctx->FragmentProgram._Current); + assert(stfp->Base.Base.Target == GL_FRAGMENT_PROGRAM_ARB); + + translate_fp(st, stfp); + + st_reference_fragprog(st, &st->fp, stfp); + + if (st->missing_textures) { + /* use a pass-through frag shader that uses no textures */ + void *fs = get_passthrough_fs(st); + cso_set_fragment_shader_handle(st->cso_context, fs); + } + else { + cso_set_fragment_shader_handle(st->cso_context, stfp->driver_shader); + } +} + + +const struct st_tracked_state st_update_fp = { + "st_update_fp", /* name */ + { /* dirty */ + 0, /* mesa */ + ST_NEW_FRAGMENT_PROGRAM /* st */ + }, + update_fp /* update */ +}; + + + +/** + * Update vertex program state/atom. This involves translating the + * Mesa vertex program into a gallium fragment program and binding it. + */ +static void +update_vp( struct st_context *st ) +{ + struct st_vertex_program *stvp; + + /* find active shader and params -- Should be covered by + * ST_NEW_VERTEX_PROGRAM + */ + assert(st->ctx->VertexProgram._Current); + stvp = st_vertex_program(st->ctx->VertexProgram._Current); + assert(stvp->Base.Base.Target == GL_VERTEX_PROGRAM_ARB); + + st->vp_varient = find_translated_vp(st, stvp); + + st_reference_vertprog(st, &st->vp, stvp); + + cso_set_vertex_shader_handle(st->cso_context, + st->vp_varient->driver_shader); + + st->vertex_result_to_slot = stvp->result_to_output; +} + + +const struct st_tracked_state st_update_vp = { + "st_update_vp", /* name */ + { /* dirty */ + _NEW_POLYGON, /* mesa */ + ST_NEW_VERTEX_PROGRAM | ST_NEW_EDGEFLAGS_DATA /* st */ + }, + update_vp /* update */ +}; |