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->has_shareable_shaders ? NULL : st;
  68
  69    /* _NEW_FRAG_CLAMP */
  70    key.clamp_color = st->clamp_frag_color_in_shader &&
  71                      st->ctx->Color._ClampFragmentColor;
  72
  73    /* Don't set it if the driver can force the interpolation by itself.
  74     * If SAMPLE_ID or SAMPLE_POS are used, the interpolation is set
  75     * automatically.
  76     * Ignore sample qualifier while computing this flag.
  77     */
  78    key.persample_shading =
  79       st->force_persample_in_shader &&
  80       !(stfp->Base.Base.SystemValuesRead & (SYSTEM_BIT_SAMPLE_ID |
  81                                             SYSTEM_BIT_SAMPLE_POS)) &&
  82       _mesa_get_min_invocations_per_fragment(st->ctx, &stfp->Base, true) > 1;
  83
  84    st->fp_variant = st_get_fp_variant(st, stfp, &key);
  85
  86    st_reference_fragprog(st, &st->fp, stfp);
  87
  88    cso_set_fragment_shader_handle(st->cso_context,
  89                                   st->fp_variant->driver_shader);
  90 }
  91
  92
  93 const struct st_tracked_state st_update_fp = {
  94    "st_update_fp",                                      /* name */
  95    {                                                    /* dirty */
  96       _NEW_BUFFERS | _NEW_MULTISAMPLE,                  /* mesa */
  97       ST_NEW_FRAGMENT_PROGRAM                           /* st */
  98    },
  99    update_fp                                    /* update */
 100 };
 101
 102
 103
 104 /**
 105  * Update vertex program state/atom.  This involves translating the
 106  * Mesa vertex program into a gallium fragment program and binding it.
 107  */
 108 static void
 109 update_vp( struct st_context *st )
 110 {
 111    struct st_vertex_program *stvp;
 112    struct st_vp_variant_key key;
 113
 114    /* find active shader and params -- Should be covered by
 115     * ST_NEW_VERTEX_PROGRAM
 116     */
 117    assert(st->ctx->VertexProgram._Current);
 118    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 119    assert(stvp->Base.Base.Target == GL_VERTEX_PROGRAM_ARB);
 120
 121    memset(&key, 0, sizeof key);
 122    key.st = st->has_shareable_shaders ? NULL : st;
 123
 124    /* When this is true, we will add an extra input to the vertex
 125     * shader translation (for edgeflags), an extra output with
 126     * edgeflag semantics, and extend the vertex shader to pass through
 127     * the input to the output.  We'll need to use similar logic to set
 128     * up the extra vertex_element input for edgeflags.
 129     */
 130    key.passthrough_edgeflags = st->vertdata_edgeflags;
 131
 132    key.clamp_color = st->clamp_vert_color_in_shader &&
 133                      st->ctx->Light._ClampVertexColor &&
 134                      (stvp->Base.Base.OutputsWritten &
 135                       (VARYING_SLOT_COL0 |
 136                        VARYING_SLOT_COL1 |
 137                        VARYING_SLOT_BFC0 |
 138                        VARYING_SLOT_BFC1));
 139
 140    st->vp_variant = st_get_vp_variant(st, stvp, &key);
 141
 142    st_reference_vertprog(st, &st->vp, stvp);
 143
 144    cso_set_vertex_shader_handle(st->cso_context,
 145                                 st->vp_variant->driver_shader);
 146
 147    st->vertex_result_to_slot = stvp->result_to_output;
 148 }
 149
 150
 151 const struct st_tracked_state st_update_vp = {
 152    "st_update_vp",                                      /* name */
 153    {                                                    /* dirty */
 154       0,                                                /* mesa */
 155       ST_NEW_VERTEX_PROGRAM                             /* st */
 156    },
 157    update_vp                                            /* update */
 158 };
 159
 160
 161
 162 static void
 163 update_gp( struct st_context *st )
 164 {
 165    struct st_geometry_program *stgp;
 166
 167    if (!st->ctx->GeometryProgram._Current) {
 168       cso_set_geometry_shader_handle(st->cso_context, NULL);
 169       return;
 170    }
 171
 172    stgp = st_geometry_program(st->ctx->GeometryProgram._Current);
 173    assert(stgp->Base.Base.Target == GL_GEOMETRY_PROGRAM_NV);
 174
 175    st->gp_variant = st_get_basic_variant(st, &stgp->tgsi, &stgp->variants);
 176
 177    st_reference_geomprog(st, &st->gp, stgp);
 178
 179    cso_set_geometry_shader_handle(st->cso_context,
 180                                   st->gp_variant->driver_shader);
 181 }
 182
 183 const struct st_tracked_state st_update_gp = {
 184    "st_update_gp",                      /* name */
 185    {                                    /* dirty */
 186       0,                                /* mesa */
 187       ST_NEW_GEOMETRY_PROGRAM           /* st */
 188    },
 189    update_gp                            /* update */
 190 };
 191
 192
 193
 194 static void
 195 update_tcp( struct st_context *st )
 196 {
 197    struct st_tessctrl_program *sttcp;
 198
 199    if (!st->ctx->TessCtrlProgram._Current) {
 200       cso_set_tessctrl_shader_handle(st->cso_context, NULL);
 201       return;
 202    }
 203
 204    sttcp = st_tessctrl_program(st->ctx->TessCtrlProgram._Current);
 205    assert(sttcp->Base.Base.Target == GL_TESS_CONTROL_PROGRAM_NV);
 206
 207    st->tcp_variant = st_get_basic_variant(st, &sttcp->tgsi, &sttcp->variants);
 208
 209    st_reference_tesscprog(st, &st->tcp, sttcp);
 210
 211    cso_set_tessctrl_shader_handle(st->cso_context,
 212                                   st->tcp_variant->driver_shader);
 213 }
 214
 215 const struct st_tracked_state st_update_tcp = {
 216    "st_update_tcp",                     /* name */
 217    {                                    /* dirty */
 218       0,                                /* mesa */
 219       ST_NEW_TESSCTRL_PROGRAM           /* st */
 220    },
 221    update_tcp                           /* update */
 222 };
 223
 224
 225
 226 static void
 227 update_tep( struct st_context *st )
 228 {
 229    struct st_tesseval_program *sttep;
 230
 231    if (!st->ctx->TessEvalProgram._Current) {
 232       cso_set_tesseval_shader_handle(st->cso_context, NULL);
 233       return;
 234    }
 235
 236    sttep = st_tesseval_program(st->ctx->TessEvalProgram._Current);
 237    assert(sttep->Base.Base.Target == GL_TESS_EVALUATION_PROGRAM_NV);
 238
 239    st->tep_variant = st_get_basic_variant(st, &sttep->tgsi, &sttep->variants);
 240
 241    st_reference_tesseprog(st, &st->tep, sttep);
 242
 243    cso_set_tesseval_shader_handle(st->cso_context,
 244                                   st->tep_variant->driver_shader);
 245 }
 246
 247 const struct st_tracked_state st_update_tep = {
 248    "st_update_tep",                     /* name */
 249    {                                    /* dirty */
 250       0,                                /* mesa */
 251       ST_NEW_TESSEVAL_PROGRAM           /* st */
 252    },
 253    update_tep                           /* update */
 254 };