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
  39 #include "main/mtypes.h"
  40 #include "main/framebuffer.h"
  41 #include "main/state.h"
  42 #include "main/texobj.h"
  43 #include "main/texstate.h"
  44 #include "program/program.h"
  45
  46 #include "pipe/p_context.h"
  47 #include "pipe/p_shader_tokens.h"
  48 #include "util/u_simple_shaders.h"
  49 #include "cso_cache/cso_context.h"
  50 #include "util/u_debug.h"
  51
  52 #include "st_context.h"
  53 #include "st_atom.h"
  54 #include "st_program.h"
  55 #include "st_texture.h"
  56 #include "st_util.h"
  57
  58
  59 static unsigned
  60 get_texture_target(struct gl_context *ctx, const unsigned unit)
  61 {
  62    struct gl_texture_object *texObj = _mesa_get_tex_unit(ctx, unit)->_Current;
  63    gl_texture_index index;
  64
  65    if (texObj) {
  66       index = _mesa_tex_target_to_index(ctx, texObj->Target);
  67    } else {
  68       /* fallback for missing texture */
  69       index = TEXTURE_2D_INDEX;
  70    }
  71
  72    /* Map mesa texture target to TGSI texture target.
  73     * Copied from st_mesa_to_tgsi.c, the shadow part is omitted */
  74    switch(index) {
  75    case TEXTURE_2D_MULTISAMPLE_INDEX: return TGSI_TEXTURE_2D_MSAA;
  76    case TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX: return TGSI_TEXTURE_2D_ARRAY_MSAA;
  77    case TEXTURE_BUFFER_INDEX: return TGSI_TEXTURE_BUFFER;
  78    case TEXTURE_1D_INDEX:   return TGSI_TEXTURE_1D;
  79    case TEXTURE_2D_INDEX:   return TGSI_TEXTURE_2D;
  80    case TEXTURE_3D_INDEX:   return TGSI_TEXTURE_3D;
  81    case TEXTURE_CUBE_INDEX: return TGSI_TEXTURE_CUBE;
  82    case TEXTURE_CUBE_ARRAY_INDEX: return TGSI_TEXTURE_CUBE_ARRAY;
  83    case TEXTURE_RECT_INDEX: return TGSI_TEXTURE_RECT;
  84    case TEXTURE_1D_ARRAY_INDEX:   return TGSI_TEXTURE_1D_ARRAY;
  85    case TEXTURE_2D_ARRAY_INDEX:   return TGSI_TEXTURE_2D_ARRAY;
  86    case TEXTURE_EXTERNAL_INDEX:   return TGSI_TEXTURE_2D;
  87    default:
  88       debug_assert(0);
  89       return TGSI_TEXTURE_1D;
  90    }
  91 }
  92
  93
  94 /**
  95  * Update fragment program state/atom.  This involves translating the
  96  * Mesa fragment program into a gallium fragment program and binding it.
  97  */
  98 void
  99 st_update_fp( struct st_context *st )
 100 {
 101    struct st_program *stfp;
 102
 103    assert(st->ctx->FragmentProgram._Current);
 104    stfp = st_program(st->ctx->FragmentProgram._Current);
 105    assert(stfp->Base.Target == GL_FRAGMENT_PROGRAM_ARB);
 106
 107    void *shader;
 108
 109    if (st->shader_has_one_variant[MESA_SHADER_FRAGMENT] &&
 110        !stfp->ati_fs && /* ATI_fragment_shader always has multiple variants */
 111        !stfp->Base.ExternalSamplersUsed && /* external samplers need variants */
 112        stfp->variants &&
 113        !st_fp_variant(stfp->variants)->key.drawpixels &&
 114        !st_fp_variant(stfp->variants)->key.bitmap) {
 115       shader = stfp->variants->driver_shader;
 116    } else {
 117       struct st_fp_variant_key key;
 118
 119       /* use memset, not an initializer to be sure all memory is zeroed */
 120       memset(&key, 0, sizeof(key));
 121
 122       key.st = st->has_shareable_shaders ? NULL : st;
 123
 124       key.lower_flatshade = st->lower_flatshade &&
 125                             st->ctx->Light.ShadeModel == GL_FLAT;
 126
 127       /* _NEW_COLOR */
 128       key.lower_alpha_func = COMPARE_FUNC_NEVER;
 129       if (st->lower_alpha_test && _mesa_is_alpha_test_enabled(st->ctx))
 130          key.lower_alpha_func = st->ctx->Color.AlphaFunc;
 131
 132       /* _NEW_LIGHT | _NEW_PROGRAM */
 133       key.lower_two_sided_color = st->lower_two_sided_color &&
 134          _mesa_vertex_program_two_side_enabled(st->ctx);
 135
 136       /* gl_driver_flags::NewFragClamp */
 137       key.clamp_color = st->clamp_frag_color_in_shader &&
 138                         st->ctx->Color._ClampFragmentColor;
 139
 140       /* _NEW_MULTISAMPLE | _NEW_BUFFERS */
 141       key.persample_shading =
 142          st->force_persample_in_shader &&
 143          _mesa_is_multisample_enabled(st->ctx) &&
 144          st->ctx->Multisample.SampleShading &&
 145          st->ctx->Multisample.MinSampleShadingValue *
 146          _mesa_geometric_samples(st->ctx->DrawBuffer) > 1;
 147
 148       key.lower_depth_clamp =
 149          st->clamp_frag_depth_in_shader &&
 150          (st->ctx->Transform.DepthClampNear ||
 151           st->ctx->Transform.DepthClampFar);
 152
 153       if (stfp->ati_fs) {
 154          key.fog = st->ctx->Fog._PackedEnabledMode;
 155
 156          for (unsigned u = 0; u < MAX_NUM_FRAGMENT_REGISTERS_ATI; u++) {
 157             key.texture_targets[u] = get_texture_target(st->ctx, u);
 158          }
 159       }
 160
 161       key.external = st_get_external_sampler_key(st, &stfp->Base);
 162
 163       shader = st_get_fp_variant(st, stfp, &key)->base.driver_shader;
 164    }
 165
 166    st_reference_prog(st, &st->fp, stfp);
 167
 168    cso_set_fragment_shader_handle(st->cso_context, shader);
 169 }
 170
 171
 172 /**
 173  * Update vertex program state/atom.  This involves translating the
 174  * Mesa vertex program into a gallium fragment program and binding it.
 175  */
 176 void
 177 st_update_vp( struct st_context *st )
 178 {
 179    struct st_program *stvp;
 180
 181    /* find active shader and params -- Should be covered by
 182     * ST_NEW_VERTEX_PROGRAM
 183     */
 184    assert(st->ctx->VertexProgram._Current);
 185    stvp = st_program(st->ctx->VertexProgram._Current);
 186    assert(stvp->Base.Target == GL_VERTEX_PROGRAM_ARB);
 187
 188    if (st->shader_has_one_variant[MESA_SHADER_VERTEX] &&
 189        stvp->variants &&
 190        st_common_variant(stvp->variants)->key.passthrough_edgeflags == st->vertdata_edgeflags &&
 191        !st_common_variant(stvp->variants)->key.is_draw_shader) {
 192       st->vp_variant = st_common_variant(stvp->variants);
 193    } else {
 194       struct st_common_variant_key key;
 195
 196       memset(&key, 0, sizeof(key));
 197
 198       key.st = st->has_shareable_shaders ? NULL : st;
 199
 200       /* When this is true, we will add an extra input to the vertex
 201        * shader translation (for edgeflags), an extra output with
 202        * edgeflag semantics, and extend the vertex shader to pass through
 203        * the input to the output.  We'll need to use similar logic to set
 204        * up the extra vertex_element input for edgeflags.
 205        */
 206       key.passthrough_edgeflags = st->vertdata_edgeflags;
 207
 208       key.clamp_color = st->clamp_vert_color_in_shader &&
 209                         st->ctx->Light._ClampVertexColor &&
 210                         (stvp->Base.info.outputs_written &
 211                          (VARYING_SLOT_COL0 |
 212                           VARYING_SLOT_COL1 |
 213                           VARYING_SLOT_BFC0 |
 214                           VARYING_SLOT_BFC1));
 215
 216       key.lower_depth_clamp =
 217             !st->gp && !st->tep &&
 218             st->clamp_frag_depth_in_shader &&
 219             (st->ctx->Transform.DepthClampNear ||
 220              st->ctx->Transform.DepthClampFar);
 221
 222       if (key.lower_depth_clamp)
 223          key.clip_negative_one_to_one =
 224                st->ctx->Transform.ClipDepthMode == GL_NEGATIVE_ONE_TO_ONE;
 225
 226       /* _NEW_POINT */
 227       key.lower_point_size = st->lower_point_size &&
 228                              !st_point_size_per_vertex(st->ctx);
 229
 230       /* _NEW_TRANSFORM */
 231       if (st->lower_ucp && st_user_clip_planes_enabled(st->ctx) &&
 232           !st->ctx->GeometryProgram._Current)
 233          key.lower_ucp = st->ctx->Transform.ClipPlanesEnabled;
 234
 235       st->vp_variant = st_get_vp_variant(st, stvp, &key);
 236    }
 237
 238    st_reference_prog(st, &st->vp, stvp);
 239
 240    cso_set_vertex_shader_handle(st->cso_context,
 241                                 st->vp_variant->base.driver_shader);
 242 }
 243
 244
 245 static void *
 246 st_update_common_program(struct st_context *st, struct gl_program *prog,
 247                          unsigned pipe_shader, struct st_program **dst)
 248 {
 249    struct st_program *stp;
 250
 251    if (!prog) {
 252       st_reference_prog(st, dst, NULL);
 253       return NULL;
 254    }
 255
 256    stp = st_program(prog);
 257    st_reference_prog(st, dst, stp);
 258
 259    if (st->shader_has_one_variant[prog->info.stage] && stp->variants)
 260       return stp->variants->driver_shader;
 261
 262    struct st_common_variant_key key;
 263
 264    /* use memset, not an initializer to be sure all memory is zeroed */
 265    memset(&key, 0, sizeof(key));
 266
 267    key.st = st->has_shareable_shaders ? NULL : st;
 268
 269    if (pipe_shader == PIPE_SHADER_GEOMETRY ||
 270        pipe_shader == PIPE_SHADER_TESS_EVAL) {
 271       key.clamp_color = st->clamp_vert_color_in_shader &&
 272                         st->ctx->Light._ClampVertexColor &&
 273                         (stp->Base.info.outputs_written &
 274                          (VARYING_SLOT_COL0 |
 275                           VARYING_SLOT_COL1 |
 276                           VARYING_SLOT_BFC0 |
 277                           VARYING_SLOT_BFC1));
 278
 279       key.lower_depth_clamp =
 280             (pipe_shader == PIPE_SHADER_GEOMETRY || !st->gp) &&
 281             st->clamp_frag_depth_in_shader &&
 282             (st->ctx->Transform.DepthClampNear ||
 283              st->ctx->Transform.DepthClampFar);
 284
 285       if (key.lower_depth_clamp)
 286          key.clip_negative_one_to_one =
 287                st->ctx->Transform.ClipDepthMode == GL_NEGATIVE_ONE_TO_ONE;
 288
 289       if (st->lower_ucp && st_user_clip_planes_enabled(st->ctx) &&
 290           pipe_shader == PIPE_SHADER_GEOMETRY)
 291          key.lower_ucp = st->ctx->Transform.ClipPlanesEnabled;
 292    }
 293
 294    return st_get_common_variant(st, stp, &key)->driver_shader;
 295 }
 296
 297
 298 void
 299 st_update_gp(struct st_context *st)
 300 {
 301    void *shader = st_update_common_program(st,
 302                                            st->ctx->GeometryProgram._Current,
 303                                            PIPE_SHADER_GEOMETRY, &st->gp);
 304    cso_set_geometry_shader_handle(st->cso_context, shader);
 305 }
 306
 307
 308 void
 309 st_update_tcp(struct st_context *st)
 310 {
 311    void *shader = st_update_common_program(st,
 312                                            st->ctx->TessCtrlProgram._Current,
 313                                            PIPE_SHADER_TESS_CTRL, &st->tcp);
 314    cso_set_tessctrl_shader_handle(st->cso_context, shader);
 315 }
 316
 317
 318 void
 319 st_update_tep(struct st_context *st)
 320 {
 321    void *shader = st_update_common_program(st,
 322                                            st->ctx->TessEvalProgram._Current,
 323                                            PIPE_SHADER_TESS_EVAL, &st->tep);
 324    cso_set_tesseval_shader_handle(st->cso_context, shader);
 325 }
 326
 327
 328 void
 329 st_update_cp(struct st_context *st)
 330 {
 331    void *shader = st_update_common_program(st,
 332                                            st->ctx->ComputeProgram._Current,
 333                                            PIPE_SHADER_COMPUTE, &st->cp);
 334    cso_set_compute_shader_handle(st->cso_context, shader);
 335 }