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