src/mesa/main/program_resource.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2015 Intel Corporation.  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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  */
  25
  26 #include "main/enums.h"
  27 #include "main/macros.h"
  28 #include "main/mtypes.h"
  29 #include "main/shaderapi.h"
  30 #include "main/shaderobj.h"
  31 #include "main/context.h"
  32 #include "program_resource.h"
  33 #include "ir_uniform.h"
  34 static bool
  35 supported_interface_enum(struct gl_context *ctx, GLenum iface)
  36 {
  37    switch (iface) {
  38    case GL_UNIFORM:
  39    case GL_UNIFORM_BLOCK:
  40    case GL_PROGRAM_INPUT:
  41    case GL_PROGRAM_OUTPUT:
  42    case GL_TRANSFORM_FEEDBACK_VARYING:
  43    case GL_ATOMIC_COUNTER_BUFFER:
  44    case GL_BUFFER_VARIABLE:
  45    case GL_SHADER_STORAGE_BLOCK:
  46       return true;
  47    case GL_VERTEX_SUBROUTINE:
  48    case GL_FRAGMENT_SUBROUTINE:
  49    case GL_VERTEX_SUBROUTINE_UNIFORM:
  50    case GL_FRAGMENT_SUBROUTINE_UNIFORM:
  51       return _mesa_has_shader_subroutine(ctx);
  52    case GL_GEOMETRY_SUBROUTINE:
  53    case GL_GEOMETRY_SUBROUTINE_UNIFORM:
  54       return _mesa_has_geometry_shaders(ctx) && _mesa_has_shader_subroutine(ctx);
  55    case GL_COMPUTE_SUBROUTINE:
  56    case GL_COMPUTE_SUBROUTINE_UNIFORM:
  57       return _mesa_has_compute_shaders(ctx) && _mesa_has_shader_subroutine(ctx);
  58    case GL_TESS_CONTROL_SUBROUTINE:
  59    case GL_TESS_EVALUATION_SUBROUTINE:
  60    case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
  61    case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
  62       return _mesa_has_tessellation(ctx) && _mesa_has_shader_subroutine(ctx);
  63    default:
  64       return false;
  65    }
  66 }
  67
  68 void GLAPIENTRY
  69 _mesa_GetProgramInterfaceiv(GLuint program, GLenum programInterface,
  70                             GLenum pname, GLint *params)
  71 {
  72    GET_CURRENT_CONTEXT(ctx);
  73    unsigned i;
  74    struct gl_shader_program *shProg =
  75       _mesa_lookup_shader_program_err(ctx, program,
  76                                       "glGetProgramInterfaceiv");
  77    if (!shProg)
  78       return;
  79
  80    if (!params) {
  81       _mesa_error(ctx, GL_INVALID_OPERATION,
  82                   "glGetProgramInterfaceiv(params NULL)");
  83       return;
  84    }
  85
  86    /* Validate interface. */
  87    if (!supported_interface_enum(ctx, programInterface)) {
  88       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramInterfaceiv(%s)",
  89                   _mesa_enum_to_string(programInterface));
  90       return;
  91    }
  92
  93    /* Validate pname against interface. */
  94    switch(pname) {
  95    case GL_ACTIVE_RESOURCES:
  96       for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++)
  97          if (shProg->ProgramResourceList[i].Type == programInterface)
  98             (*params)++;
  99       break;
 100    case GL_MAX_NAME_LENGTH:
 101       if (programInterface == GL_ATOMIC_COUNTER_BUFFER) {
 102          _mesa_error(ctx, GL_INVALID_OPERATION,
 103                      "glGetProgramInterfaceiv(%s pname %s)",
 104                      _mesa_enum_to_string(programInterface),
 105                      _mesa_enum_to_string(pname));
 106          return;
 107       }
 108       /* Name length consists of base name, 3 additional chars '[0]' if
 109        * resource is an array and finally 1 char for string terminator.
 110        */
 111       for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 112          if (shProg->ProgramResourceList[i].Type != programInterface)
 113             continue;
 114          unsigned len =
 115             _mesa_program_resource_name_len(&shProg->ProgramResourceList[i]);
 116          *params = MAX2(*params, len + 1);
 117       }
 118       break;
 119    case GL_MAX_NUM_ACTIVE_VARIABLES:
 120       switch (programInterface) {
 121       case GL_UNIFORM_BLOCK:
 122       case GL_SHADER_STORAGE_BLOCK:
 123          for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 124             if (shProg->ProgramResourceList[i].Type == programInterface) {
 125                struct gl_uniform_block *block =
 126                   (struct gl_uniform_block *)
 127                   shProg->ProgramResourceList[i].Data;
 128                *params = MAX2(*params, block->NumUniforms);
 129             }
 130          }
 131          break;
 132       case GL_ATOMIC_COUNTER_BUFFER:
 133          for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 134             if (shProg->ProgramResourceList[i].Type == programInterface) {
 135                struct gl_active_atomic_buffer *buffer =
 136                   (struct gl_active_atomic_buffer *)
 137                   shProg->ProgramResourceList[i].Data;
 138                *params = MAX2(*params, buffer->NumUniforms);
 139             }
 140          }
 141          break;
 142       default:
 143         _mesa_error(ctx, GL_INVALID_OPERATION,
 144                     "glGetProgramInterfaceiv(%s pname %s)",
 145                     _mesa_enum_to_string(programInterface),
 146                     _mesa_enum_to_string(pname));
 147       };
 148       break;
 149    case GL_MAX_NUM_COMPATIBLE_SUBROUTINES:
 150       switch (programInterface) {
 151       case GL_VERTEX_SUBROUTINE_UNIFORM:
 152       case GL_FRAGMENT_SUBROUTINE_UNIFORM:
 153       case GL_GEOMETRY_SUBROUTINE_UNIFORM:
 154       case GL_COMPUTE_SUBROUTINE_UNIFORM:
 155       case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
 156       case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM: {
 157          for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 158             if (shProg->ProgramResourceList[i].Type == programInterface) {
 159                struct gl_uniform_storage *uni =
 160                   (struct gl_uniform_storage *)
 161                   shProg->ProgramResourceList[i].Data;
 162                *params = MAX2(*params, uni->num_compatible_subroutines);
 163             }
 164          }
 165          break;
 166       }
 167
 168       default:
 169          _mesa_error(ctx, GL_INVALID_OPERATION,
 170                      "glGetProgramInterfaceiv(%s pname %s)",
 171                      _mesa_enum_to_string(programInterface),
 172                      _mesa_enum_to_string(pname));
 173       }
 174       break;
 175    default:
 176       _mesa_error(ctx, GL_INVALID_OPERATION,
 177                   "glGetProgramInterfaceiv(pname %s)",
 178                   _mesa_enum_to_string(pname));
 179    }
 180 }
 181
 182 static bool
 183 is_xfb_marker(const char *str)
 184 {
 185    static const char *markers[] = {
 186       "gl_NextBuffer",
 187       "gl_SkipComponents1",
 188       "gl_SkipComponents2",
 189       "gl_SkipComponents3",
 190       "gl_SkipComponents4",
 191       NULL
 192    };
 193    const char **m = markers;
 194
 195    if (strncmp(str, "gl_", 3) != 0)
 196       return false;
 197
 198    for (; *m; m++)
 199       if (strcmp(*m, str) == 0)
 200          return true;
 201
 202    return false;
 203 }
 204
 205 GLuint GLAPIENTRY
 206 _mesa_GetProgramResourceIndex(GLuint program, GLenum programInterface,
 207                               const GLchar *name)
 208 {
 209    GET_CURRENT_CONTEXT(ctx);
 210    unsigned array_index = 0;
 211    struct gl_program_resource *res;
 212    struct gl_shader_program *shProg =
 213       _mesa_lookup_shader_program_err(ctx, program,
 214                                       "glGetProgramResourceIndex");
 215    if (!shProg || !name)
 216       return GL_INVALID_INDEX;
 217
 218    if (!supported_interface_enum(ctx, programInterface)) {
 219       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceIndex(%s)",
 220                   _mesa_enum_to_string(programInterface));
 221       return GL_INVALID_INDEX;
 222    }
 223    /*
 224     * For the interface TRANSFORM_FEEDBACK_VARYING, the value INVALID_INDEX
 225     * should be returned when querying the index assigned to the special names
 226     * "gl_NextBuffer", "gl_SkipComponents1", "gl_SkipComponents2",
 227     * "gl_SkipComponents3", and "gl_SkipComponents4".
 228     */
 229    if (programInterface == GL_TRANSFORM_FEEDBACK_VARYING &&
 230        is_xfb_marker(name))
 231       return GL_INVALID_INDEX;
 232
 233    switch (programInterface) {
 234    case GL_TESS_CONTROL_SUBROUTINE:
 235    case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
 236    case GL_TESS_EVALUATION_SUBROUTINE:
 237    case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
 238    case GL_COMPUTE_SUBROUTINE:
 239    case GL_COMPUTE_SUBROUTINE_UNIFORM:
 240    case GL_GEOMETRY_SUBROUTINE:
 241    case GL_GEOMETRY_SUBROUTINE_UNIFORM:
 242    case GL_VERTEX_SUBROUTINE:
 243    case GL_FRAGMENT_SUBROUTINE:
 244    case GL_VERTEX_SUBROUTINE_UNIFORM:
 245    case GL_FRAGMENT_SUBROUTINE_UNIFORM:
 246    case GL_PROGRAM_INPUT:
 247    case GL_PROGRAM_OUTPUT:
 248    case GL_UNIFORM:
 249    case GL_BUFFER_VARIABLE:
 250    case GL_TRANSFORM_FEEDBACK_VARYING:
 251    case GL_UNIFORM_BLOCK:
 252    case GL_SHADER_STORAGE_BLOCK:
 253       res = _mesa_program_resource_find_name(shProg, programInterface, name,
 254                                              &array_index);
 255       if (!res || array_index > 0)
 256          return GL_INVALID_INDEX;
 257
 258       return _mesa_program_resource_index(shProg, res);
 259    case GL_ATOMIC_COUNTER_BUFFER:
 260    default:
 261       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceIndex(%s)",
 262                   _mesa_enum_to_string(programInterface));
 263    }
 264
 265    return GL_INVALID_INDEX;
 266 }
 267
 268 void GLAPIENTRY
 269 _mesa_GetProgramResourceName(GLuint program, GLenum programInterface,
 270                              GLuint index, GLsizei bufSize, GLsizei *length,
 271                              GLchar *name)
 272 {
 273    GET_CURRENT_CONTEXT(ctx);
 274    struct gl_shader_program *shProg =
 275       _mesa_lookup_shader_program_err(ctx, program,
 276                                       "glGetProgramResourceName");
 277
 278    if (!shProg || !name)
 279       return;
 280
 281    if (programInterface == GL_ATOMIC_COUNTER_BUFFER ||
 282        !supported_interface_enum(ctx, programInterface)) {
 283       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceName(%s)",
 284                   _mesa_enum_to_string(programInterface));
 285       return;
 286    }
 287
 288    _mesa_get_program_resource_name(shProg, programInterface, index, bufSize,
 289                                    length, name, "glGetProgramResourceName");
 290 }
 291
 292 void GLAPIENTRY
 293 _mesa_GetProgramResourceiv(GLuint program, GLenum programInterface,
 294                            GLuint index, GLsizei propCount,
 295                            const GLenum *props, GLsizei bufSize,
 296                            GLsizei *length, GLint *params)
 297 {
 298    GET_CURRENT_CONTEXT(ctx);
 299    struct gl_shader_program *shProg =
 300       _mesa_lookup_shader_program_err(ctx, program, "glGetProgramResourceiv");
 301
 302    if (!shProg || !params)
 303       return;
 304
 305    /* The error INVALID_VALUE is generated if <propCount> is zero.
 306     * Note that we check < 0 here because it makes sense to bail early.
 307     */
 308    if (propCount <= 0) {
 309       _mesa_error(ctx, GL_INVALID_VALUE,
 310                   "glGetProgramResourceiv(propCount <= 0)");
 311       return;
 312    }
 313
 314    /* No need to write any properties, user requested none. */
 315    if (bufSize == 0)
 316       return;
 317
 318    _mesa_get_program_resourceiv(shProg, programInterface, index,
 319                                 propCount, props, bufSize, length, params);
 320 }
 321
 322 static struct gl_shader_program *
 323 lookup_linked_program(GLuint program, const char *caller)
 324 {
 325    GET_CURRENT_CONTEXT(ctx);
 326    struct gl_shader_program *prog =
 327       _mesa_lookup_shader_program_err(ctx, program, caller);
 328
 329    if (!prog)
 330       return NULL;
 331
 332    if (prog->LinkStatus == GL_FALSE) {
 333       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)",
 334                   caller);
 335       return NULL;
 336    }
 337    return prog;
 338 }
 339
 340 GLint GLAPIENTRY
 341 _mesa_GetProgramResourceLocation(GLuint program, GLenum programInterface,
 342                                  const GLchar *name)
 343 {
 344    GET_CURRENT_CONTEXT(ctx);
 345    struct gl_shader_program *shProg =
 346       lookup_linked_program(program, "glGetProgramResourceLocation");
 347
 348    if (!shProg || !name)
 349       return -1;
 350
 351    /* Validate programInterface. */
 352    switch (programInterface) {
 353    case GL_UNIFORM:
 354    case GL_PROGRAM_INPUT:
 355    case GL_PROGRAM_OUTPUT:
 356       break;
 357
 358    case GL_VERTEX_SUBROUTINE_UNIFORM:
 359    case GL_FRAGMENT_SUBROUTINE_UNIFORM:
 360       if (!_mesa_has_shader_subroutine(ctx))
 361          goto fail;
 362       break;
 363    case GL_GEOMETRY_SUBROUTINE_UNIFORM:
 364       if (!_mesa_has_geometry_shaders(ctx) || !_mesa_has_shader_subroutine(ctx))
 365          goto fail;
 366       break;
 367    case GL_COMPUTE_SUBROUTINE_UNIFORM:
 368       if (!_mesa_has_compute_shaders(ctx) || !_mesa_has_shader_subroutine(ctx))
 369          goto fail;
 370       break;
 371    case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
 372    case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
 373       if (!_mesa_has_tessellation(ctx) || !_mesa_has_shader_subroutine(ctx))
 374          goto fail;
 375       break;
 376    default:
 377          goto fail;
 378    }
 379
 380    return _mesa_program_resource_location(shProg, programInterface, name);
 381 fail:
 382    _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceLocation(%s %s)",
 383                _mesa_enum_to_string(programInterface), name);
 384    return -1;
 385 }
 386
 387 /**
 388  * Returns output index for dual source blending.
 389  */
 390 GLint GLAPIENTRY
 391 _mesa_GetProgramResourceLocationIndex(GLuint program, GLenum programInterface,
 392                                       const GLchar *name)
 393 {
 394    GET_CURRENT_CONTEXT(ctx);
 395    struct gl_shader_program *shProg =
 396       lookup_linked_program(program, "glGetProgramResourceLocationIndex");
 397
 398    if (!shProg || !name)
 399       return -1;
 400
 401    /* From the GL_ARB_program_interface_query spec:
 402     *
 403     * "For GetProgramResourceLocationIndex, <programInterface> must be
 404     * PROGRAM_OUTPUT."
 405     */
 406    if (programInterface != GL_PROGRAM_OUTPUT) {
 407       _mesa_error(ctx, GL_INVALID_ENUM,
 408                   "glGetProgramResourceLocationIndex(%s)",
 409                   _mesa_enum_to_string(programInterface));
 410       return -1;
 411    }
 412
 413    return _mesa_program_resource_location_index(shProg, GL_PROGRAM_OUTPUT,
 414                                                 name);
 415 }