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 "program_resource.h"
  32
  33 static bool
  34 supported_interface_enum(GLenum iface)
  35 {
  36    switch (iface) {
  37    case GL_UNIFORM:
  38    case GL_UNIFORM_BLOCK:
  39    case GL_PROGRAM_INPUT:
  40    case GL_PROGRAM_OUTPUT:
  41    case GL_TRANSFORM_FEEDBACK_VARYING:
  42    case GL_ATOMIC_COUNTER_BUFFER:
  43       return true;
  44    case GL_VERTEX_SUBROUTINE:
  45    case GL_TESS_CONTROL_SUBROUTINE:
  46    case GL_TESS_EVALUATION_SUBROUTINE:
  47    case GL_GEOMETRY_SUBROUTINE:
  48    case GL_FRAGMENT_SUBROUTINE:
  49    case GL_COMPUTE_SUBROUTINE:
  50    case GL_VERTEX_SUBROUTINE_UNIFORM:
  51    case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
  52    case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
  53    case GL_GEOMETRY_SUBROUTINE_UNIFORM:
  54    case GL_FRAGMENT_SUBROUTINE_UNIFORM:
  55    case GL_COMPUTE_SUBROUTINE_UNIFORM:
  56    case GL_BUFFER_VARIABLE:
  57    case GL_SHADER_STORAGE_BLOCK:
  58    default:
  59       return false;
  60    }
  61 }
  62
  63 void GLAPIENTRY
  64 _mesa_GetProgramInterfaceiv(GLuint program, GLenum programInterface,
  65                             GLenum pname, GLint *params)
  66 {
  67    GET_CURRENT_CONTEXT(ctx);
  68    unsigned i;
  69    struct gl_shader_program *shProg =
  70       _mesa_lookup_shader_program_err(ctx, program,
  71                                       "glGetProgramInterfaceiv");
  72    if (!shProg)
  73       return;
  74
  75    if (!params) {
  76       _mesa_error(ctx, GL_INVALID_OPERATION,
  77                   "glGetProgramInterfaceiv(params NULL)");
  78       return;
  79    }
  80
  81    /* Validate interface. */
  82    if (!supported_interface_enum(programInterface)) {
  83       _mesa_error(ctx, GL_INVALID_OPERATION, "glGetProgramInterfaceiv(%s)",
  84                   _mesa_lookup_enum_by_nr(programInterface));
  85       return;
  86    }
  87
  88    /* Validate pname against interface. */
  89    switch(pname) {
  90    case GL_ACTIVE_RESOURCES:
  91       for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++)
  92          if (shProg->ProgramResourceList[i].Type == programInterface)
  93             (*params)++;
  94       break;
  95    case GL_MAX_NAME_LENGTH:
  96       if (programInterface == GL_ATOMIC_COUNTER_BUFFER) {
  97          _mesa_error(ctx, GL_INVALID_OPERATION,
  98                      "glGetProgramInterfaceiv(%s pname %s)",
  99                      _mesa_lookup_enum_by_nr(programInterface),
 100                      _mesa_lookup_enum_by_nr(pname));
 101          return;
 102       }
 103       /* Name length consists of base name, 3 additional chars '[0]' if
 104        * resource is an array and finally 1 char for string terminator.
 105        */
 106       for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 107          if (shProg->ProgramResourceList[i].Type != programInterface)
 108             continue;
 109          const char *name =
 110             _mesa_program_resource_name(&shProg->ProgramResourceList[i]);
 111          unsigned array_size =
 112             _mesa_program_resource_array_size(&shProg->ProgramResourceList[i]);
 113          *params = MAX2(*params, strlen(name) + (array_size ? 3 : 0) + 1);
 114       }
 115       break;
 116    case GL_MAX_NUM_ACTIVE_VARIABLES:
 117       switch (programInterface) {
 118       case GL_UNIFORM_BLOCK:
 119          for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 120             if (shProg->ProgramResourceList[i].Type == programInterface) {
 121                struct gl_uniform_block *block =
 122                   (struct gl_uniform_block *)
 123                   shProg->ProgramResourceList[i].Data;
 124                *params = MAX2(*params, block->NumUniforms);
 125             }
 126          }
 127          break;
 128       case GL_ATOMIC_COUNTER_BUFFER:
 129          for (i = 0, *params = 0; i < shProg->NumProgramResourceList; i++) {
 130             if (shProg->ProgramResourceList[i].Type == programInterface) {
 131                struct gl_active_atomic_buffer *buffer =
 132                   (struct gl_active_atomic_buffer *)
 133                   shProg->ProgramResourceList[i].Data;
 134                *params = MAX2(*params, buffer->NumUniforms);
 135             }
 136          }
 137          break;
 138       default:
 139         _mesa_error(ctx, GL_INVALID_OPERATION,
 140                     "glGetProgramInterfaceiv(%s pname %s)",
 141                     _mesa_lookup_enum_by_nr(programInterface),
 142                     _mesa_lookup_enum_by_nr(pname));
 143       };
 144       break;
 145    case GL_MAX_NUM_COMPATIBLE_SUBROUTINES:
 146    default:
 147       _mesa_error(ctx, GL_INVALID_OPERATION,
 148                   "glGetProgramInterfaceiv(pname %s)",
 149                   _mesa_lookup_enum_by_nr(pname));
 150    }
 151 }
 152
 153 static bool
 154 is_xfb_marker(const char *str)
 155 {
 156    static const char *markers[] = {
 157       "gl_NextBuffer",
 158       "gl_SkipComponents1",
 159       "gl_SkipComponents2",
 160       "gl_SkipComponents3",
 161       "gl_SkipComponents4",
 162       NULL
 163    };
 164    const char **m = markers;
 165
 166    if (strncmp(str, "gl_", 3) != 0)
 167       return false;
 168
 169    for (; *m; m++)
 170       if (strcmp(*m, str) == 0)
 171          return true;
 172
 173    return false;
 174 }
 175
 176 /**
 177  * Checks if given name index is legal for GetProgramResourceIndex,
 178  * check is written to be compatible with GL_ARB_array_of_arrays.
 179  */
 180 static bool
 181 valid_program_resource_index_name(const GLchar *name)
 182 {
 183    const char *array = strstr(name, "[");
 184    const char *close = strrchr(name, ']');
 185
 186    /* Not array, no need for the check. */
 187    if (!array)
 188       return true;
 189
 190    /* Last array index has to be zero. */
 191    if (!close || *--close != '0')
 192       return false;
 193
 194    return true;
 195 }
 196
 197 GLuint GLAPIENTRY
 198 _mesa_GetProgramResourceIndex(GLuint program, GLenum programInterface,
 199                               const GLchar *name)
 200 {
 201    GET_CURRENT_CONTEXT(ctx);
 202    struct gl_program_resource *res;
 203    struct gl_shader_program *shProg =
 204       _mesa_lookup_shader_program_err(ctx, program,
 205                                       "glGetProgramResourceIndex");
 206    if (!shProg || !name)
 207       return GL_INVALID_INDEX;
 208
 209    /*
 210     * For the interface TRANSFORM_FEEDBACK_VARYING, the value INVALID_INDEX
 211     * should be returned when querying the index assigned to the special names
 212     * "gl_NextBuffer", "gl_SkipComponents1", "gl_SkipComponents2",
 213     * "gl_SkipComponents3", and "gl_SkipComponents4".
 214     */
 215    if (programInterface == GL_TRANSFORM_FEEDBACK_VARYING &&
 216        is_xfb_marker(name))
 217       return GL_INVALID_INDEX;
 218
 219    switch (programInterface) {
 220    case GL_PROGRAM_INPUT:
 221    case GL_PROGRAM_OUTPUT:
 222    case GL_UNIFORM:
 223    case GL_UNIFORM_BLOCK:
 224    case GL_TRANSFORM_FEEDBACK_VARYING:
 225       /* Validate name syntax for arrays. */
 226       if (!valid_program_resource_index_name(name))
 227          return GL_INVALID_INDEX;
 228
 229       res = _mesa_program_resource_find_name(shProg, programInterface, name);
 230       if (!res)
 231          return GL_INVALID_INDEX;
 232
 233       return _mesa_program_resource_index(shProg, res);
 234    case GL_ATOMIC_COUNTER_BUFFER:
 235    default:
 236       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceIndex(%s)",
 237                   _mesa_lookup_enum_by_nr(programInterface));
 238    }
 239
 240    return GL_INVALID_INDEX;
 241 }
 242
 243 void GLAPIENTRY
 244 _mesa_GetProgramResourceName(GLuint program, GLenum programInterface,
 245                              GLuint index, GLsizei bufSize, GLsizei *length,
 246                              GLchar *name)
 247 {
 248    GET_CURRENT_CONTEXT(ctx);
 249    struct gl_shader_program *shProg =
 250       _mesa_lookup_shader_program_err(ctx, program,
 251                                       "glGetProgramResourceName");
 252
 253    /* Set user friendly return values in case of errors. */
 254    if (name)
 255       *name = '\0';
 256    if (length)
 257       *length = 0;
 258
 259    if (!shProg || !name)
 260       return;
 261
 262    if (programInterface == GL_ATOMIC_COUNTER_BUFFER ||
 263        !supported_interface_enum(programInterface)) {
 264       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceName(%s)",
 265                   _mesa_lookup_enum_by_nr(programInterface));
 266       return;
 267    }
 268
 269    _mesa_get_program_resource_name(shProg, programInterface, index, bufSize,
 270                                    length, name, "glGetProgramResourceName");
 271 }
 272
 273 void GLAPIENTRY
 274 _mesa_GetProgramResourceiv(GLuint program, GLenum programInterface,
 275                            GLuint index, GLsizei propCount,
 276                            const GLenum *props, GLsizei bufSize,
 277                            GLsizei *length, GLint *params)
 278 {
 279 }
 280
 281 /**
 282  * Function verifies syntax of given name for GetProgramResourceLocation
 283  * and GetProgramResourceLocationIndex for the following cases:
 284  *
 285  * "array element portion of a string passed to GetProgramResourceLocation
 286  * or GetProgramResourceLocationIndex must not have, a "+" sign, extra
 287  * leading zeroes, or whitespace".
 288  *
 289  * Check is written to be compatible with GL_ARB_array_of_arrays.
 290  */
 291 static bool
 292 invalid_array_element_syntax(const GLchar *name)
 293 {
 294    char *first = strchr(name, '[');
 295    char *last = strrchr(name, '[');
 296
 297    if (!first)
 298       return false;
 299
 300    /* No '+' or ' ' allowed anywhere. */
 301    if (strchr(first, '+') || strchr(first, ' '))
 302       return true;
 303
 304    /* Check that last array index is 0. */
 305    if (last[1] == '0' && last[2] != ']')
 306       return true;
 307
 308    return false;
 309 }
 310
 311 static struct gl_shader_program *
 312 lookup_linked_program(GLuint program, const char *caller)
 313 {
 314    GET_CURRENT_CONTEXT(ctx);
 315    struct gl_shader_program *prog =
 316       _mesa_lookup_shader_program_err(ctx, program, caller);
 317
 318    if (!prog)
 319       return NULL;
 320
 321    if (prog->LinkStatus == GL_FALSE) {
 322       _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)",
 323                   caller);
 324       return NULL;
 325    }
 326    return prog;
 327 }
 328
 329 GLint GLAPIENTRY
 330 _mesa_GetProgramResourceLocation(GLuint program, GLenum programInterface,
 331                                  const GLchar *name)
 332 {
 333    GET_CURRENT_CONTEXT(ctx);
 334    struct gl_shader_program *shProg =
 335       lookup_linked_program(program, "glGetProgramResourceLocation");
 336
 337    if (!shProg || !name || invalid_array_element_syntax(name))
 338       return -1;
 339
 340    /* Validate programInterface. */
 341    switch (programInterface) {
 342    case GL_UNIFORM:
 343    case GL_PROGRAM_INPUT:
 344    case GL_PROGRAM_OUTPUT:
 345       break;
 346
 347    /* For reference valid cases requiring additional extension support:
 348     * GL_ARB_shader_subroutine
 349     * GL_ARB_tessellation_shader
 350     * GL_ARB_compute_shader
 351     */
 352    case GL_VERTEX_SUBROUTINE_UNIFORM:
 353    case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
 354    case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
 355    case GL_GEOMETRY_SUBROUTINE_UNIFORM:
 356    case GL_FRAGMENT_SUBROUTINE_UNIFORM:
 357    case GL_COMPUTE_SUBROUTINE_UNIFORM:
 358
 359    default:
 360       _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramResourceLocation(%s %s)",
 361                   _mesa_lookup_enum_by_nr(programInterface), name);
 362    }
 363
 364    return _mesa_program_resource_location(shProg, programInterface, name);
 365 }
 366
 367 /**
 368  * Returns output index for dual source blending.
 369  */
 370 GLint GLAPIENTRY
 371 _mesa_GetProgramResourceLocationIndex(GLuint program, GLenum programInterface,
 372                                       const GLchar *name)
 373 {
 374    GET_CURRENT_CONTEXT(ctx);
 375    struct gl_shader_program *shProg =
 376       lookup_linked_program(program, "glGetProgramResourceLocationIndex");
 377
 378    if (!shProg || !name || invalid_array_element_syntax(name))
 379       return -1;
 380
 381    /* From the GL_ARB_program_interface_query spec:
 382     *
 383     * "For GetProgramResourceLocationIndex, <programInterface> must be
 384     * PROGRAM_OUTPUT."
 385     */
 386    if (programInterface != GL_PROGRAM_OUTPUT) {
 387       _mesa_error(ctx, GL_INVALID_ENUM,
 388                   "glGetProgramResourceLocationIndex(%s)",
 389                   _mesa_lookup_enum_by_nr(programInterface));
 390       return -1;
 391    }
 392
 393    return _mesa_program_resource_location_index(shProg, GL_PROGRAM_OUTPUT,
 394                                                 name);
 395 }