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       !st->can_force_persample_interp &&
  76       _mesa_get_min_invocations_per_fragment(st->ctx, &stfp->Base, true) > 1;
  77
  78    st->fp_variant = st_get_fp_variant(st, stfp, &key);
  79
  80    st_reference_fragprog(st, &st->fp, stfp);
  81
  82    cso_set_fragment_shader_handle(st->cso_context,
  83                                   st->fp_variant->driver_shader);
  84 }
  85
  86
  87 const struct st_tracked_state st_update_fp = {
  88    "st_update_fp",                                      /* name */
  89    {                                                    /* dirty */
  90       _NEW_BUFFERS | _NEW_MULTISAMPLE,                  /* mesa */
  91       ST_NEW_FRAGMENT_PROGRAM                           /* st */
  92    },
  93    update_fp                                    /* update */
  94 };
  95
  96
  97
  98 /**
  99  * Update vertex program state/atom.  This involves translating the
 100  * Mesa vertex program into a gallium fragment program and binding it.
 101  */
 102 static void
 103 update_vp( struct st_context *st )
 104 {
 105    struct st_vertex_program *stvp;
 106    struct st_vp_variant_key key;
 107
 108    /* find active shader and params -- Should be covered by
 109     * ST_NEW_VERTEX_PROGRAM
 110     */
 111    assert(st->ctx->VertexProgram._Current);
 112    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 113    assert(stvp->Base.Base.Target == GL_VERTEX_PROGRAM_ARB);
 114
 115    memset(&key, 0, sizeof key);
 116    key.st = st;  /* variants are per-context */
 117
 118    /* When this is true, we will add an extra input to the vertex
 119     * shader translation (for edgeflags), an extra output with
 120     * edgeflag semantics, and extend the vertex shader to pass through
 121     * the input to the output.  We'll need to use similar logic to set
 122     * up the extra vertex_element input for edgeflags.
 123     */
 124    key.passthrough_edgeflags = st->vertdata_edgeflags;
 125
 126    key.clamp_color = st->clamp_vert_color_in_shader &&
 127                      st->ctx->Light._ClampVertexColor &&
 128                      (stvp->Base.Base.OutputsWritten &
 129                       (VARYING_SLOT_COL0 |
 130                        VARYING_SLOT_COL1 |
 131                        VARYING_SLOT_BFC0 |
 132                        VARYING_SLOT_BFC1));
 133
 134    st->vp_variant = st_get_vp_variant(st, stvp, &key);
 135
 136    st_reference_vertprog(st, &st->vp, stvp);
 137
 138    cso_set_vertex_shader_handle(st->cso_context,
 139                                 st->vp_variant->driver_shader);
 140
 141    st->vertex_result_to_slot = stvp->result_to_output;
 142 }
 143
 144
 145 const struct st_tracked_state st_update_vp = {
 146    "st_update_vp",                                      /* name */
 147    {                                                    /* dirty */
 148       0,                                                /* mesa */
 149       ST_NEW_VERTEX_PROGRAM                             /* st */
 150    },
 151    update_vp                                            /* update */
 152 };
 153
 154
 155
 156 static void
 157 update_gp( struct st_context *st )
 158 {
 159    struct st_geometry_program *stgp;
 160    struct st_gp_variant_key key;
 161
 162    if (!st->ctx->GeometryProgram._Current) {
 163       cso_set_geometry_shader_handle(st->cso_context, NULL);
 164       return;
 165    }
 166
 167    stgp = st_geometry_program(st->ctx->GeometryProgram._Current);
 168    assert(stgp->Base.Base.Target == GL_GEOMETRY_PROGRAM_NV);
 169
 170    memset(&key, 0, sizeof(key));
 171    key.st = st;
 172
 173    st->gp_variant = st_get_gp_variant(st, stgp, &key);
 174
 175    st_reference_geomprog(st, &st->gp, stgp);
 176
 177    cso_set_geometry_shader_handle(st->cso_context,
 178                                   st->gp_variant->driver_shader);
 179 }
 180
 181 const struct st_tracked_state st_update_gp = {
 182    "st_update_gp",                      /* name */
 183    {                                    /* dirty */
 184       0,                                /* mesa */
 185       ST_NEW_GEOMETRY_PROGRAM           /* st */
 186    },
 187    update_gp                            /* update */
 188 };
 189
 190
 191
 192 static void
 193 update_tcp( struct st_context *st )
 194 {
 195    struct st_tessctrl_program *sttcp;
 196    struct st_tcp_variant_key key;
 197
 198    if (!st->ctx->TessCtrlProgram._Current) {
 199       cso_set_tessctrl_shader_handle(st->cso_context, NULL);
 200       return;
 201    }
 202
 203    sttcp = st_tessctrl_program(st->ctx->TessCtrlProgram._Current);
 204    assert(sttcp->Base.Base.Target == GL_TESS_CONTROL_PROGRAM_NV);
 205
 206    memset(&key, 0, sizeof(key));
 207    key.st = st;
 208
 209    st->tcp_variant = st_get_tcp_variant(st, sttcp, &key);
 210
 211    st_reference_tesscprog(st, &st->tcp, sttcp);
 212
 213    cso_set_tessctrl_shader_handle(st->cso_context,
 214                                   st->tcp_variant->driver_shader);
 215 }
 216
 217 const struct st_tracked_state st_update_tcp = {
 218    "st_update_tcp",                     /* name */
 219    {                                    /* dirty */
 220       0,                                /* mesa */
 221       ST_NEW_TESSCTRL_PROGRAM           /* st */
 222    },
 223    update_tcp                           /* update */
 224 };
 225
 226
 227
 228 static void
 229 update_tep( struct st_context *st )
 230 {
 231    struct st_tesseval_program *sttep;
 232    struct st_tep_variant_key key;
 233
 234    if (!st->ctx->TessEvalProgram._Current) {
 235       cso_set_tesseval_shader_handle(st->cso_context, NULL);
 236       return;
 237    }
 238
 239    sttep = st_tesseval_program(st->ctx->TessEvalProgram._Current);
 240    assert(sttep->Base.Base.Target == GL_TESS_EVALUATION_PROGRAM_NV);
 241
 242    memset(&key, 0, sizeof(key));
 243    key.st = st;
 244
 245    st->tep_variant = st_get_tep_variant(st, sttep, &key);
 246
 247    st_reference_tesseprog(st, &st->tep, sttep);
 248
 249    cso_set_tesseval_shader_handle(st->cso_context,
 250                                   st->tep_variant->driver_shader);
 251 }
 252
 253 const struct st_tracked_state st_update_tep = {
 254    "st_update_tep",                     /* name */
 255    {                                    /* dirty */
 256       0,                                /* mesa */
 257       ST_NEW_TESSEVAL_PROGRAM           /* st */
 258    },
 259    update_tep                           /* update */
 260 };