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 #include "st_util.h"
  56
  57
  58 static unsigned
  59 get_texture_target(struct gl_context *ctx, const unsigned unit)
  60 {
  61    struct gl_texture_object *texObj = _mesa_get_tex_unit(ctx, unit)->_Current;
  62    gl_texture_index index;
  63
  64    if (texObj) {
  65       index = _mesa_tex_target_to_index(ctx, texObj->Target);
  66    } else {
  67       /* fallback for missing texture */
  68       index = TEXTURE_2D_INDEX;
  69    }
  70
  71    /* Map mesa texture target to TGSI texture target.
  72     * Copied from st_mesa_to_tgsi.c, the shadow part is omitted */
  73    switch(index) {
  74    case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA;
  75    case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA;
  76    case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER;
  77    case TEXTURE_1D_INDEX:   return TGSI_TEXTURE_1D;
  78    case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_2D;
  79    case TEXTURE_3D_INDEX:   return TGSI_TEXTURE_3D;
  80    case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
  81    case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
  82    case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
  83    case TEXTURE_1D_ARRAY_INDEX:   return TGSI_TEXTURE_1D_ARRAY;
  84    case TEXTURE_2D_ARRAY_INDEX:   return TGSI_TEXTURE_2D_ARRAY;
  85    case TEXTURE_EXTERNAL_INDEX:   return TGSI_TEXTURE_2D;
  86    default:
  87       debug_assert(0);
  88       return TGSI_TEXTURE_1D;
  89    }
  90 }
  91
  92
  93 /**
  94  * Update fragment program state/atom.  This involves translating the
  95  * Mesa fragment program into a gallium fragment program and binding it.
  96  */
  97 void
  98 st_update_fp( struct st_context *st )
  99 {
 100    struct st_fragment_program *stfp;
 101
 102    assert(st->ctx->FragmentProgram._Current);
 103    stfp = st_fragment_program(st->ctx->FragmentProgram._Current);
 104    assert(stfp->Base.Target == GL_FRAGMENT_PROGRAM_ARB);
 105
 106    void *shader;
 107
 108    if (st->shader_has_one_variant[MESA_SHADER_FRAGMENT] &&
 109        !stfp->ati_fs && /* ATI_fragment_shader always has multiple variants */
 110        !stfp->Base.ExternalSamplersUsed && /* external samplers need variants */
 111        stfp->variants &&
 112        !stfp->variants->key.drawpixels &&
 113        !stfp->variants->key.bitmap) {
 114       shader = stfp->variants->driver_shader;
 115    } else {
 116       struct st_fp_variant_key key;
 117
 118       /* use memset, not an initializer to be sure all memory is zeroed */
 119       memset(&key, 0, sizeof(key));
 120
 121       key.st = st->has_shareable_shaders ? NULL : st;
 122
 123       key.lower_flatshade = st->lower_flatshade &&
 124                             st->ctx->Light.ShadeModel == GL_FLAT;
 125
 126       /* _NEW_COLOR */
 127       key.lower_alpha_func = COMPARE_FUNC_NEVER;
 128       if (st->lower_alpha_test && _mesa_is_alpha_test_enabled(st->ctx))
 129          key.lower_alpha_func = st->ctx->Color.AlphaFunc;
 130
 131       /* _NEW_FRAG_CLAMP */
 132       key.clamp_color = st->clamp_frag_color_in_shader &&
 133                         st->ctx->Color._ClampFragmentColor;
 134
 135       /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
 136       key.persample_shading =
 137          st->force_persample_in_shader &&
 138          _mesa_is_multisample_enabled(st->ctx) &&
 139          st->ctx->Multisample.SampleShading &&
 140          st->ctx->Multisample.MinSampleShadingValue *
 141          _mesa_geometric_samples(st->ctx->DrawBuffer) > 1;
 142
 143       key.lower_depth_clamp =
 144          st->clamp_frag_depth_in_shader &&
 145          (st->ctx->Transform.DepthClampNear ||
 146           st->ctx->Transform.DepthClampFar);
 147
 148       if (stfp->ati_fs) {
 149          key.fog = st->ctx->Fog._PackedEnabledMode;
 150
 151          for (unsigned u = 0; u < MAX_NUM_FRAGMENT_REGISTERS_ATI; u++) {
 152             key.texture_targets[u] = get_texture_target(st->ctx, u);
 153          }
 154       }
 155
 156       key.external = st_get_external_sampler_key(st, &stfp->Base);
 157
 158       shader = st_get_fp_variant(st, stfp, &key)->driver_shader;
 159    }
 160
 161    st_reference_fragprog(st, &st->fp, stfp);
 162
 163    cso_set_fragment_shader_handle(st->cso_context, shader);
 164 }
 165
 166
 167 /**
 168  * Update vertex program state/atom.  This involves translating the
 169  * Mesa vertex program into a gallium fragment program and binding it.
 170  */
 171 void
 172 st_update_vp( struct st_context *st )
 173 {
 174    struct st_vertex_program *stvp;
 175
 176    /* find active shader and params -- Should be covered by
 177     * ST_NEW_VERTEX_PROGRAM
 178     */
 179    assert(st->ctx->VertexProgram._Current);
 180    stvp = st_vertex_program(st->ctx->VertexProgram._Current);
 181    assert(stvp->Base.Target == GL_VERTEX_PROGRAM_ARB);
 182
 183    if (st->shader_has_one_variant[MESA_SHADER_VERTEX] &&
 184        stvp->variants &&
 185        stvp->variants->key.passthrough_edgeflags == st->vertdata_edgeflags) {
 186       st->vp_variant = stvp->variants;
 187    } else {
 188       struct st_vp_variant_key key;
 189
 190       memset(&key, 0, sizeof(key));
 191
 192       key.st = st->has_shareable_shaders ? NULL : st;
 193
 194       /* When this is true, we will add an extra input to the vertex
 195        * shader translation (for edgeflags), an extra output with
 196        * edgeflag semantics, and extend the vertex shader to pass through
 197        * the input to the output.  We'll need to use similar logic to set
 198        * up the extra vertex_element input for edgeflags.
 199        */
 200       key.passthrough_edgeflags = st->vertdata_edgeflags;
 201
 202       key.clamp_color = st->clamp_vert_color_in_shader &&
 203                         st->ctx->Light._ClampVertexColor &&
 204                         (stvp->Base.info.outputs_written &
 205                          (VARYING_SLOT_COL0 |
 206                           VARYING_SLOT_COL1 |
 207                           VARYING_SLOT_BFC0 |
 208                           VARYING_SLOT_BFC1));
 209
 210       key.lower_depth_clamp =
 211             !st->gp && !st->tep &&
 212             st->clamp_frag_depth_in_shader &&
 213             (st->ctx->Transform.DepthClampNear ||
 214              st->ctx->Transform.DepthClampFar);
 215
 216       if (key.lower_depth_clamp)
 217          key.clip_negative_one_to_one =
 218                st->ctx->Transform.ClipDepthMode == GL_NEGATIVE_ONE_TO_ONE;
 219
 220       /* _NEW_POINT */
 221       key.lower_point_size = st->lower_point_size &&
 222                              !st_point_size_per_vertex(st->ctx);
 223
 224       st->vp_variant = st_get_vp_variant(st, stvp, &key);
 225    }
 226
 227    st_reference_vertprog(st, &st->vp, stvp);
 228
 229    cso_set_vertex_shader_handle(st->cso_context,
 230                                 st->vp_variant->driver_shader);
 231 }
 232
 233
 234 static void *
 235 st_update_common_program(struct st_context *st, struct gl_program *prog,
 236                          unsigned pipe_shader, struct st_common_program **dst)
 237 {
 238    struct st_common_program *stp;
 239
 240    if (!prog) {
 241       st_reference_prog(st, dst, NULL);
 242       return NULL;
 243    }
 244
 245    stp = st_common_program(prog);
 246    st_reference_prog(st, dst, stp);
 247
 248    if (st->shader_has_one_variant[prog->info.stage] && stp->variants)
 249       return stp->variants->driver_shader;
 250
 251    struct st_basic_variant_key key;
 252
 253    /* use memset, not an initializer to be sure all memory is zeroed */
 254    memset(&key, 0, sizeof(key));
 255
 256    key.st = st->has_shareable_shaders ? NULL : st;
 257
 258    if (pipe_shader == PIPE_SHADER_GEOMETRY ||
 259        pipe_shader == PIPE_SHADER_TESS_EVAL) {
 260       key.clamp_color = st->clamp_vert_color_in_shader &&
 261                         st->ctx->Light._ClampVertexColor &&
 262                         (stp->Base.info.outputs_written &
 263                          (VARYING_SLOT_COL0 |
 264                           VARYING_SLOT_COL1 |
 265                           VARYING_SLOT_BFC0 |
 266                           VARYING_SLOT_BFC1));
 267
 268       key.lower_depth_clamp =
 269             (pipe_shader == PIPE_SHADER_GEOMETRY || !st->gp) &&
 270             st->clamp_frag_depth_in_shader &&
 271             (st->ctx->Transform.DepthClampNear ||
 272              st->ctx->Transform.DepthClampFar);
 273
 274       if (key.lower_depth_clamp)
 275          key.clip_negative_one_to_one =
 276                st->ctx->Transform.ClipDepthMode == GL_NEGATIVE_ONE_TO_ONE;
 277
 278    }
 279
 280    return st_get_basic_variant(st, stp, &key)->driver_shader;
 281 }
 282
 283
 284 void
 285 st_update_gp(struct st_context *st)
 286 {
 287    void *shader = st_update_common_program(st,
 288                                            st->ctx->GeometryProgram._Current,
 289                                            PIPE_SHADER_GEOMETRY, &st->gp);
 290    cso_set_geometry_shader_handle(st->cso_context, shader);
 291 }
 292
 293
 294 void
 295 st_update_tcp(struct st_context *st)
 296 {
 297    void *shader = st_update_common_program(st,
 298                                            st->ctx->TessCtrlProgram._Current,
 299                                            PIPE_SHADER_TESS_CTRL, &st->tcp);
 300    cso_set_tessctrl_shader_handle(st->cso_context, shader);
 301 }
 302
 303
 304 void
 305 st_update_tep(struct st_context *st)
 306 {
 307    void *shader = st_update_common_program(st,
 308                                            st->ctx->TessEvalProgram._Current,
 309                                            PIPE_SHADER_TESS_EVAL, &st->tep);
 310    cso_set_tesseval_shader_handle(st->cso_context, shader);
 311 }
 312
 313
 314 void
 315 st_update_cp(struct st_context *st)
 316 {
 317    void *shader = st_update_common_program(st,
 318                                            st->ctx->ComputeProgram._Current,
 319                                            PIPE_SHADER_COMPUTE, &st->cp);
 320    cso_set_compute_shader_handle(st->cso_context, shader);
 321 }