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 "main/framebuffer.h"
  41 #include "main/texobj.h"
  42 #include "main/texstate.h"
  43 #include "program/program.h"
  44
  45 #include "pipe/p_context.h"
  46 #include "pipe/p_shader_tokens.h"
  47 #include "util/u_simple_shaders.h"
  48 #include "cso_cache/cso_context.h"
  49 #include "util/u_debug.h"
  50
  51 #include "st_context.h"
  52 #include "st_atom.h"
  53 #include "st_program.h"
  54 #include "st_texture.h"
  55
  56
  57 /** Compress the fog function enums into a 2-bit value */
  58 static GLuint
  59 translate_fog_mode(GLenum mode)
  60 {
  61    switch (mode) {
  62    case GL_LINEAR: return 1;
  63    case GL_EXP:    return 2;
  64    case GL_EXP2:   return 3;
  65    default:
  66       return 0;
  67    }
  68 }
  69
  70 static unsigned
  71 get_texture_target(struct gl_context *ctx, const unsigned unit)
  72 {
  73    struct gl_texture_object *texObj = _mesa_get_tex_unit(ctx, unit)->_Current;
  74    gl_texture_index index;
  75
  76    if (texObj) {
  77       index = _mesa_tex_target_to_index(ctx, texObj->Target);
  78    } else {
  79       /* fallback for missing texture */
  80       index = TEXTURE_2D_INDEX;
  81    }
  82
  83    /* Map mesa texture target to TGSI texture target.
  84     * Copied from st_mesa_to_tgsi.c, the shadow part is omitted */
  85    switch(index) {
  86    case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA;
  87    case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA;
  88    case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER;
  89    case TEXTURE_1D_INDEX:   return TGSI_TEXTURE_1D;
  90    case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_2D;
  91    case TEXTURE_3D_INDEX:   return TGSI_TEXTURE_3D;
  92    case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
  93    case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
  94    case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
  95    case TEXTURE_1D_ARRAY_INDEX:   return TGSI_TEXTURE_1D_ARRAY;
  96    case TEXTURE_2D_ARRAY_INDEX:   return TGSI_TEXTURE_2D_ARRAY;
  97    case TEXTURE_EXTERNAL_INDEX:   return TGSI_TEXTURE_2D;
  98    default:
  99       debug_assert(0);
 100       return TGSI_TEXTURE_1D;
 101    }
 102 }
 103
 104
 105 /**
 106  * Update fragment program state/atom.  This involves translating the
 107  * Mesa fragment program into a gallium fragment program and binding it.
 108  */
 109 static void
 110 update_fp( struct st_context *st )
 111 {
 112    struct st_fragment_program *stfp;
 113    struct st_fp_variant_key key;
 114
 115    assert(st->ctx->FragmentProgram._Current);
 116    stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
 117    assert(stfp->Base.Target == GL_FRAGMENT_PROGRAM_ARB);
 118
 119    memset(&key, 0, sizeof(key));
 120    key.st = st->has_shareable_shaders ? NULL : st;
 121
 122    /* _NEW_FRAG_CLAMP */
 123    key.clamp_color = st->clamp_frag_color_in_shader &&
 124                      st->ctx->Color._ClampFragmentColor;
 125
 126    /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
 127    key.persample_shading =
 128       st->force_persample_in_shader &&
 129       _mesa_is_multisample_enabled(st->ctx) &&
 130       st->ctx->Multisample.SampleShading &&
 131       st->ctx->Multisample.MinSampleShadingValue *
 132       _mesa_geometric_samples(st->ctx->DrawBuffer) > 1;
 133
 134    if (stfp->ati_fs) {
 135       if (st->ctx->Fog.Enabled) {
 136          key.fog = translate_fog_mode(st->ctx->Fog.Mode);
 137       }
 138
 139       for (unsigned u = 0; u < MAX_NUM_FRAGMENT_REGISTERS_ATI; u++) {
 140          key.texture_targets[u] = get_texture_target(st->ctx, u);
 141       }
 142    }
 143
 144    key.external = st_get_external_sampler_key(st, &stfp->Base);
 145
 146    st->fp_variant = st_get_fp_variant(st, stfp, &key);
 147
 148    st_reference_fragprog(st, &st->fp, stfp);
 149
 150    cso_set_fragment_shader_handle(st->cso_context,
 151                                   st->fp_variant->driver_shader);
 152 }
 153
 154
 155 const struct st_tracked_state st_update_fp = {
 156    update_fp                                    /* update */
 157 };
 158
 159
 160
 161 /**
 162  * Update vertex program state/atom.  This involves translating the
 163  * Mesa vertex program into a gallium fragment program and binding it.
 164  */
 165 static void
 166 update_vp( struct st_context *st )
 167 {
 168    struct st_vertex_program *stvp;
 169    struct st_vp_variant_key key;
 170
 171    /* find active shader and params -- Should be covered by
 172     * ST_NEW_VERTEX_PROGRAM
 173     */
 174    assert(st->ctx->VertexProgram._Current);
 175    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 176    assert(stvp->Base.Target == GL_VERTEX_PROGRAM_ARB);
 177
 178    memset(&key, 0, sizeof key);
 179    key.st = st->has_shareable_shaders ? NULL : st;
 180
 181    /* When this is true, we will add an extra input to the vertex
 182     * shader translation (for edgeflags), an extra output with
 183     * edgeflag semantics, and extend the vertex shader to pass through
 184     * the input to the output.  We'll need to use similar logic to set
 185     * up the extra vertex_element input for edgeflags.
 186     */
 187    key.passthrough_edgeflags = st->vertdata_edgeflags;
 188
 189    key.clamp_color = st->clamp_vert_color_in_shader &&
 190                      st->ctx->Light._ClampVertexColor &&
 191                      (stvp->Base.info.outputs_written &
 192                       (VARYING_SLOT_COL0 |
 193                        VARYING_SLOT_COL1 |
 194                        VARYING_SLOT_BFC0 |
 195                        VARYING_SLOT_BFC1));
 196
 197    st->vp_variant = st_get_vp_variant(st, stvp, &key);
 198
 199    st_reference_vertprog(st, &st->vp, stvp);
 200
 201    cso_set_vertex_shader_handle(st->cso_context,
 202                                 st->vp_variant->driver_shader);
 203
 204    st->vertex_result_to_slot = stvp->result_to_output;
 205 }
 206
 207
 208 const struct st_tracked_state st_update_vp = {
 209    update_vp                                            /* update */
 210 };
 211
 212
 213
 214 static void
 215 update_gp( struct st_context *st )
 216 {
 217    struct st_geometry_program *stgp;
 218
 219    if (!st->ctx->GeometryProgram._Current) {
 220       cso_set_geometry_shader_handle(st->cso_context, NULL);
 221       st_reference_geomprog(st, &st->gp, NULL);
 222       return;
 223    }
 224
 225    stgp = st_geometry_program(st->ctx->GeometryProgram._Current);
 226    assert(stgp->Base.Target == GL_GEOMETRY_PROGRAM_NV);
 227
 228    st->gp_variant = st_get_basic_variant(st, PIPE_SHADER_GEOMETRY,
 229                                          &stgp->tgsi, &stgp->variants);
 230
 231    st_reference_geomprog(st, &st->gp, stgp);
 232
 233    cso_set_geometry_shader_handle(st->cso_context,
 234                                   st->gp_variant->driver_shader);
 235 }
 236
 237 const struct st_tracked_state st_update_gp = {
 238    update_gp                            /* update */
 239 };
 240
 241
 242
 243 static void
 244 update_tcp( struct st_context *st )
 245 {
 246    struct st_tessctrl_program *sttcp;
 247
 248    if (!st->ctx->TessCtrlProgram._Current) {
 249       cso_set_tessctrl_shader_handle(st->cso_context, NULL);
 250       st_reference_tesscprog(st, &st->tcp, NULL);
 251       return;
 252    }
 253
 254    sttcp = st_tessctrl_program(st->ctx->TessCtrlProgram._Current);
 255    assert(sttcp->Base.Target == GL_TESS_CONTROL_PROGRAM_NV);
 256
 257    st->tcp_variant = st_get_basic_variant(st, PIPE_SHADER_TESS_CTRL,
 258                                           &sttcp->tgsi, &sttcp->variants);
 259
 260    st_reference_tesscprog(st, &st->tcp, sttcp);
 261
 262    cso_set_tessctrl_shader_handle(st->cso_context,
 263                                   st->tcp_variant->driver_shader);
 264 }
 265
 266 const struct st_tracked_state st_update_tcp = {
 267    update_tcp                           /* update */
 268 };
 269
 270
 271
 272 static void
 273 update_tep( struct st_context *st )
 274 {
 275    struct st_tesseval_program *sttep;
 276
 277    if (!st->ctx->TessEvalProgram._Current) {
 278       cso_set_tesseval_shader_handle(st->cso_context, NULL);
 279       st_reference_tesseprog(st, &st->tep, NULL);
 280       return;
 281    }
 282
 283    sttep = st_tesseval_program(st->ctx->TessEvalProgram._Current);
 284    assert(sttep->Base.Target == GL_TESS_EVALUATION_PROGRAM_NV);
 285
 286    st->tep_variant = st_get_basic_variant(st, PIPE_SHADER_TESS_EVAL,
 287                                           &sttep->tgsi, &sttep->variants);
 288
 289    st_reference_tesseprog(st, &st->tep, sttep);
 290
 291    cso_set_tesseval_shader_handle(st->cso_context,
 292                                   st->tep_variant->driver_shader);
 293 }
 294
 295 const struct st_tracked_state st_update_tep = {
 296    update_tep                           /* update */
 297 };
 298
 299
 300
 301 static void
 302 update_cp( struct st_context *st )
 303 {
 304    struct st_compute_program *stcp;
 305
 306    if (!st->ctx->ComputeProgram._Current) {
 307       cso_set_compute_shader_handle(st->cso_context, NULL);
 308       st_reference_compprog(st, &st->cp, NULL);
 309       return;
 310    }
 311
 312    stcp = st_compute_program(st->ctx->ComputeProgram._Current);
 313    assert(stcp->Base.Target == GL_COMPUTE_PROGRAM_NV);
 314
 315    st->cp_variant = st_get_cp_variant(st, &stcp->tgsi, &stcp->variants);
 316
 317    st_reference_compprog(st, &st->cp, stcp);
 318
 319    cso_set_compute_shader_handle(st->cso_context,
 320                                  st->cp_variant->driver_shader);
 321 }
 322
 323 const struct st_tracked_state st_update_cp = {
 324    update_cp                            /* update */
 325 };