src/mesa/state_tracker/st_atom_shader.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * State validation for vertex/fragment shaders.
  30  * Note that we have to delay most vertex/fragment shader translation
  31  * until rendering time since the linkage between the vertex outputs and
  32  * fragment inputs can vary depending on the pairing of shaders.
  33  *
  34  * Authors:
  35  *   Brian Paul
  36  */
  37
  38 #include "main/imports.h"
  39 #include "main/mtypes.h"
  40 #include "program/program.h"
  41
  42 #include "pipe/p_context.h"
  43 #include "pipe/p_shader_tokens.h"
  44 #include "util/u_simple_shaders.h"
  45 #include "cso_cache/cso_context.h"
  46
  47 #include "st_context.h"
  48 #include "st_atom.h"
  49 #include "st_program.h"
  50
  51
  52 /**
  53  * Update fragment program state/atom.  This involves translating the
  54  * Mesa fragment program into a gallium fragment program and binding it.
  55  */
  56 static void
  57 update_fp( struct st_context *st )
  58 {
  59    struct st_fragment_program *stfp;
  60    struct st_fp_variant_key key;
  61
  62    assert(st->ctx->FragmentProgram._Current);
  63    stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
  64    assert(stfp->Base.Base.Target == GL_FRAGMENT_PROGRAM_ARB);
  65
  66    memset(&key, 0, sizeof(key));
  67    key.st = st;
  68
  69    /* _NEW_FRAG_CLAMP */
  70    key.clamp_color = st->clamp_frag_color_in_shader &&
  71                      st->ctx->Color._ClampFragmentColor;
  72
  73    /* Ignore sample qualifier while computing this flag. */
  74    key.persample_shading =
  75       _mesa_get_min_invocations_per_fragment(st->ctx, &stfp->Base, true) > 1;
  76
  77    st->fp_variant = st_get_fp_variant(st, stfp, &key);
  78
  79    st_reference_fragprog(st, &st->fp, stfp);
  80
  81    cso_set_fragment_shader_handle(st->cso_context,
  82                                   st->fp_variant->driver_shader);
  83 }
  84
  85
  86 const struct st_tracked_state st_update_fp = {
  87    "st_update_fp",                                      /* name */
  88    {                                                    /* dirty */
  89       _NEW_BUFFERS | _NEW_MULTISAMPLE,                  /* mesa */
  90       ST_NEW_FRAGMENT_PROGRAM                           /* st */
  91    },
  92    update_fp                                    /* update */
  93 };
  94
  95
  96
  97 /**
  98  * Update vertex program state/atom.  This involves translating the
  99  * Mesa vertex program into a gallium fragment program and binding it.
 100  */
 101 static void
 102 update_vp( struct st_context *st )
 103 {
 104    struct st_vertex_program *stvp;
 105    struct st_vp_variant_key key;
 106
 107    /* find active shader and params -- Should be covered by
 108     * ST_NEW_VERTEX_PROGRAM
 109     */
 110    assert(st->ctx->VertexProgram._Current);
 111    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 112    assert(stvp->Base.Base.Target == GL_VERTEX_PROGRAM_ARB);
 113
 114    memset(&key, 0, sizeof key);
 115    key.st = st;  /* variants are per-context */
 116
 117    /* When this is true, we will add an extra input to the vertex
 118     * shader translation (for edgeflags), an extra output with
 119     * edgeflag semantics, and extend the vertex shader to pass through
 120     * the input to the output.  We'll need to use similar logic to set
 121     * up the extra vertex_element input for edgeflags.
 122     */
 123    key.passthrough_edgeflags = st->vertdata_edgeflags;
 124
 125    key.clamp_color = st->clamp_vert_color_in_shader &&
 126                      st->ctx->Light._ClampVertexColor &&
 127                      (stvp->Base.Base.OutputsWritten &
 128                       (VARYING_SLOT_COL0 |
 129                        VARYING_SLOT_COL1 |
 130                        VARYING_SLOT_BFC0 |
 131                        VARYING_SLOT_BFC1));
 132
 133    st->vp_variant = st_get_vp_variant(st, stvp, &key);
 134
 135    st_reference_vertprog(st, &st->vp, stvp);
 136
 137    cso_set_vertex_shader_handle(st->cso_context,
 138                                 st->vp_variant->driver_shader);
 139
 140    st->vertex_result_to_slot = stvp->result_to_output;
 141 }
 142
 143
 144 const struct st_tracked_state st_update_vp = {
 145    "st_update_vp",                                      /* name */
 146    {                                                    /* dirty */
 147       0,                                                /* mesa */
 148       ST_NEW_VERTEX_PROGRAM                             /* st */
 149    },
 150    update_vp                                            /* update */
 151 };
 152
 153
 154
 155 static void
 156 update_gp( struct st_context *st )
 157 {
 158    struct st_geometry_program *stgp;
 159    struct st_gp_variant_key key;
 160
 161    if (!st->ctx->GeometryProgram._Current) {
 162       cso_set_geometry_shader_handle(st->cso_context, NULL);
 163       return;
 164    }
 165
 166    stgp = st_geometry_program(st->ctx->GeometryProgram._Current);
 167    assert(stgp->Base.Base.Target == GL_GEOMETRY_PROGRAM_NV);
 168
 169    memset(&key, 0, sizeof(key));
 170    key.st = st;
 171
 172    st->gp_variant = st_get_gp_variant(st, stgp, &key);
 173
 174    st_reference_geomprog(st, &st->gp, stgp);
 175
 176    cso_set_geometry_shader_handle(st->cso_context,
 177                                   st->gp_variant->driver_shader);
 178 }
 179
 180 const struct st_tracked_state st_update_gp = {
 181    "st_update_gp",                      /* name */
 182    {                                    /* dirty */
 183       0,                                /* mesa */
 184       ST_NEW_GEOMETRY_PROGRAM           /* st */
 185    },
 186    update_gp                            /* update */
 187 };
 188
 189
 190
 191 static void
 192 update_tcp( struct st_context *st )
 193 {
 194    struct st_tessctrl_program *sttcp;
 195    struct st_tcp_variant_key key;
 196
 197    if (!st->ctx->TessCtrlProgram._Current) {
 198       cso_set_tessctrl_shader_handle(st->cso_context, NULL);
 199       return;
 200    }
 201
 202    sttcp = st_tessctrl_program(st->ctx->TessCtrlProgram._Current);
 203    assert(sttcp->Base.Base.Target == GL_TESS_CONTROL_PROGRAM_NV);
 204
 205    memset(&key, 0, sizeof(key));
 206    key.st = st;
 207
 208    st->tcp_variant = st_get_tcp_variant(st, sttcp, &key);
 209
 210    st_reference_tesscprog(st, &st->tcp, sttcp);
 211
 212    cso_set_tessctrl_shader_handle(st->cso_context,
 213                                   st->tcp_variant->driver_shader);
 214 }
 215
 216 const struct st_tracked_state st_update_tcp = {
 217    "st_update_tcp",                     /* name */
 218    {                                    /* dirty */
 219       0,                                /* mesa */
 220       ST_NEW_TESSCTRL_PROGRAM           /* st */
 221    },
 222    update_tcp                           /* update */
 223 };
 224
 225
 226
 227 static void
 228 update_tep( struct st_context *st )
 229 {
 230    struct st_tesseval_program *sttep;
 231    struct st_tep_variant_key key;
 232
 233    if (!st->ctx->TessEvalProgram._Current) {
 234       cso_set_tesseval_shader_handle(st->cso_context, NULL);
 235       return;
 236    }
 237
 238    sttep = st_tesseval_program(st->ctx->TessEvalProgram._Current);
 239    assert(sttep->Base.Base.Target == GL_TESS_EVALUATION_PROGRAM_NV);
 240
 241    memset(&key, 0, sizeof(key));
 242    key.st = st;
 243
 244    st->tep_variant = st_get_tep_variant(st, sttep, &key);
 245
 246    st_reference_tesseprog(st, &st->tep, sttep);
 247
 248    cso_set_tesseval_shader_handle(st->cso_context,
 249                                   st->tep_variant->driver_shader);
 250 }
 251
 252 const struct st_tracked_state st_update_tep = {
 253    "st_update_tep",                     /* name */
 254    {                                    /* dirty */
 255       0,                                /* mesa */
 256       ST_NEW_TESSEVAL_PROGRAM           /* st */
 257    },
 258    update_tep                           /* update */
 259 };