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       unsigned u;
 136
 137       if (st->ctx->Fog.Enabled) {
 138          key.fog = translate_fog_mode(st->ctx->Fog.Mode);
 139       }
 140
 141       for (u = 0; u < MAX_NUM_FRAGMENT_REGISTERS_ATI; u++) {
 142          key.texture_targets[u] = get_texture_target(st->ctx, u);
 143       }
 144    }
 145
 146    key.external = st_get_external_sampler_key(st, &stfp->Base);
 147
 148    st->fp_variant = st_get_fp_variant(st, stfp, &key);
 149
 150    st_reference_fragprog(st, &st->fp, stfp);
 151
 152    cso_set_fragment_shader_handle(st->cso_context,
 153                                   st->fp_variant->driver_shader);
 154 }
 155
 156
 157 const struct st_tracked_state st_update_fp = {
 158    update_fp                                    /* update */
 159 };
 160
 161
 162
 163 /**
 164  * Update vertex program state/atom.  This involves translating the
 165  * Mesa vertex program into a gallium fragment program and binding it.
 166  */
 167 static void
 168 update_vp( struct st_context *st )
 169 {
 170    struct st_vertex_program *stvp;
 171    struct st_vp_variant_key key;
 172
 173    /* find active shader and params -- Should be covered by
 174     * ST_NEW_VERTEX_PROGRAM
 175     */
 176    assert(st->ctx->VertexProgram._Current);
 177    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 178    assert(stvp->Base.Target == GL_VERTEX_PROGRAM_ARB);
 179
 180    memset(&key, 0, sizeof key);
 181    key.st = st->has_shareable_shaders ? NULL : st;
 182
 183    /* When this is true, we will add an extra input to the vertex
 184     * shader translation (for edgeflags), an extra output with
 185     * edgeflag semantics, and extend the vertex shader to pass through
 186     * the input to the output.  We'll need to use similar logic to set
 187     * up the extra vertex_element input for edgeflags.
 188     */
 189    key.passthrough_edgeflags = st->vertdata_edgeflags;
 190
 191    key.clamp_color = st->clamp_vert_color_in_shader &&
 192                      st->ctx->Light._ClampVertexColor &&
 193                      (stvp->Base.info.outputs_written &
 194                       (VARYING_SLOT_COL0 |
 195                        VARYING_SLOT_COL1 |
 196                        VARYING_SLOT_BFC0 |
 197                        VARYING_SLOT_BFC1));
 198
 199    st->vp_variant = st_get_vp_variant(st, stvp, &key);
 200
 201    st_reference_vertprog(st, &st->vp, stvp);
 202
 203    cso_set_vertex_shader_handle(st->cso_context,
 204                                 st->vp_variant->driver_shader);
 205
 206    st->vertex_result_to_slot = stvp->result_to_output;
 207 }
 208
 209
 210 const struct st_tracked_state st_update_vp = {
 211    update_vp                                            /* update */
 212 };
 213
 214
 215
 216 static void
 217 update_gp( struct st_context *st )
 218 {
 219    struct st_geometry_program *stgp;
 220
 221    if (!st->ctx->GeometryProgram._Current) {
 222       cso_set_geometry_shader_handle(st->cso_context, NULL);
 223       st_reference_geomprog(st, &st->gp, NULL);
 224       return;
 225    }
 226
 227    stgp = st_geometry_program(st->ctx->GeometryProgram._Current);
 228    assert(stgp->Base.Target == GL_GEOMETRY_PROGRAM_NV);
 229
 230    st->gp_variant = st_get_basic_variant(st, PIPE_SHADER_GEOMETRY,
 231                                          &stgp->tgsi, &stgp->variants);
 232
 233    st_reference_geomprog(st, &st->gp, stgp);
 234
 235    cso_set_geometry_shader_handle(st->cso_context,
 236                                   st->gp_variant->driver_shader);
 237 }
 238
 239 const struct st_tracked_state st_update_gp = {
 240    update_gp                            /* update */
 241 };
 242
 243
 244
 245 static void
 246 update_tcp( struct st_context *st )
 247 {
 248    struct st_tessctrl_program *sttcp;
 249
 250    if (!st->ctx->TessCtrlProgram._Current) {
 251       cso_set_tessctrl_shader_handle(st->cso_context, NULL);
 252       st_reference_tesscprog(st, &st->tcp, NULL);
 253       return;
 254    }
 255
 256    sttcp = st_tessctrl_program(st->ctx->TessCtrlProgram._Current);
 257    assert(sttcp->Base.Target == GL_TESS_CONTROL_PROGRAM_NV);
 258
 259    st->tcp_variant = st_get_basic_variant(st, PIPE_SHADER_TESS_CTRL,
 260                                           &sttcp->tgsi, &sttcp->variants);
 261
 262    st_reference_tesscprog(st, &st->tcp, sttcp);
 263
 264    cso_set_tessctrl_shader_handle(st->cso_context,
 265                                   st->tcp_variant->driver_shader);
 266 }
 267
 268 const struct st_tracked_state st_update_tcp = {
 269    update_tcp                           /* update */
 270 };
 271
 272
 273
 274 static void
 275 update_tep( struct st_context *st )
 276 {
 277    struct st_tesseval_program *sttep;
 278
 279    if (!st->ctx->TessEvalProgram._Current) {
 280       cso_set_tesseval_shader_handle(st->cso_context, NULL);
 281       st_reference_tesseprog(st, &st->tep, NULL);
 282       return;
 283    }
 284
 285    sttep = st_tesseval_program(st->ctx->TessEvalProgram._Current);
 286    assert(sttep->Base.Target == GL_TESS_EVALUATION_PROGRAM_NV);
 287
 288    st->tep_variant = st_get_basic_variant(st, PIPE_SHADER_TESS_EVAL,
 289                                           &sttep->tgsi, &sttep->variants);
 290
 291    st_reference_tesseprog(st, &st->tep, sttep);
 292
 293    cso_set_tesseval_shader_handle(st->cso_context,
 294                                   st->tep_variant->driver_shader);
 295 }
 296
 297 const struct st_tracked_state st_update_tep = {
 298    update_tep                           /* update */
 299 };
 300
 301
 302
 303 static void
 304 update_cp( struct st_context *st )
 305 {
 306    struct st_compute_program *stcp;
 307
 308    if (!st->ctx->ComputeProgram._Current) {
 309       cso_set_compute_shader_handle(st->cso_context, NULL);
 310       st_reference_compprog(st, &st->cp, NULL);
 311       return;
 312    }
 313
 314    stcp = st_compute_program(st->ctx->ComputeProgram._Current);
 315    assert(stcp->Base.Target == GL_COMPUTE_PROGRAM_NV);
 316
 317    st->cp_variant = st_get_cp_variant(st, &stcp->tgsi, &stcp->variants);
 318
 319    st_reference_compprog(st, &st->cp, stcp);
 320
 321    cso_set_compute_shader_handle(st->cso_context,
 322                                  st->cp_variant->driver_shader);
 323 }
 324
 325 const struct st_tracked_state st_update_cp = {
 326    update_cp                            /* update */
 327 };