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