1 /* 2 * Copyright 2013 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 21 * DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: 24 * Francisco Jerez <currojerez (at) riseup.net> 25 */ 26 27 #include <assert.h> 28 29 #include "shaderimage.h" 30 #include "mtypes.h" 31 #include "formats.h" 32 #include "errors.h" 33 #include "hash.h" 34 #include "context.h" 35 #include "texobj.h" 36 #include "teximage.h" 37 #include "enums.h" 38 39 /* 40 * Define endian-invariant aliases for some mesa formats that are 41 * defined in terms of their channel layout from LSB to MSB in a 42 * 32-bit word. The actual byte offsets matter here because the user 43 * is allowed to bit-cast one format into another and get predictable 44 * results. 45 */ 46 #ifdef MESA_BIG_ENDIAN 47 # define MESA_FORMAT_RGBA_8 MESA_FORMAT_A8B8G8R8_UNORM 48 # define MESA_FORMAT_RG_16 MESA_FORMAT_G16R16_UNORM 49 # define MESA_FORMAT_RG_8 MESA_FORMAT_G8R8_UNORM 50 # define MESA_FORMAT_SIGNED_RGBA_8 MESA_FORMAT_A8B8G8R8_SNORM 51 # define MESA_FORMAT_SIGNED_RG_16 MESA_FORMAT_G16R16_SNORM 52 # define MESA_FORMAT_SIGNED_RG_8 MESA_FORMAT_G8R8_SNORM 53 #else 54 # define MESA_FORMAT_RGBA_8 MESA_FORMAT_R8G8B8A8_UNORM 55 # define MESA_FORMAT_RG_16 MESA_FORMAT_R16G16_UNORM 56 # define MESA_FORMAT_RG_8 MESA_FORMAT_R8G8_UNORM 57 # define MESA_FORMAT_SIGNED_RGBA_8 MESA_FORMAT_R8G8B8A8_SNORM 58 # define MESA_FORMAT_SIGNED_RG_16 MESA_FORMAT_R16G16_SNORM 59 # define MESA_FORMAT_SIGNED_RG_8 MESA_FORMAT_R8G8_SNORM 60 #endif 61 62 mesa_format 63 _mesa_get_shader_image_format(GLenum format) 64 { 65 switch (format) { 66 case GL_RGBA32F: 67 return MESA_FORMAT_RGBA_FLOAT32; 68 69 case GL_RGBA16F: 70 return MESA_FORMAT_RGBA_FLOAT16; 71 72 case GL_RG32F: 73 return MESA_FORMAT_RG_FLOAT32; 74 75 case GL_RG16F: 76 return MESA_FORMAT_RG_FLOAT16; 77 78 case GL_R11F_G11F_B10F: 79 return MESA_FORMAT_R11G11B10_FLOAT; 80 81 case GL_R32F: 82 return MESA_FORMAT_R_FLOAT32; 83 84 case GL_R16F: 85 return MESA_FORMAT_R_FLOAT16; 86 87 case GL_RGBA32UI: 88 return MESA_FORMAT_RGBA_UINT32; 89 90 case GL_RGBA16UI: 91 return MESA_FORMAT_RGBA_UINT16; 92 93 case GL_RGB10_A2UI: 94 return MESA_FORMAT_R10G10B10A2_UINT; 95 96 case GL_RGBA8UI: 97 return MESA_FORMAT_RGBA_UINT8; 98 99 case GL_RG32UI: 100 return MESA_FORMAT_RG_UINT32; 101 102 case GL_RG16UI: 103 return MESA_FORMAT_RG_UINT16; 104 105 case GL_RG8UI: 106 return MESA_FORMAT_RG_UINT8; 107 108 case GL_R32UI: 109 return MESA_FORMAT_R_UINT32; 110 111 case GL_R16UI: 112 return MESA_FORMAT_R_UINT16; 113 114 case GL_R8UI: 115 return MESA_FORMAT_R_UINT8; 116 117 case GL_RGBA32I: 118 return MESA_FORMAT_RGBA_SINT32; 119 120 case GL_RGBA16I: 121 return MESA_FORMAT_RGBA_SINT16; 122 123 case GL_RGBA8I: 124 return MESA_FORMAT_RGBA_SINT8; 125 126 case GL_RG32I: 127 return MESA_FORMAT_RG_SINT32; 128 129 case GL_RG16I: 130 return MESA_FORMAT_RG_SINT16; 131 132 case GL_RG8I: 133 return MESA_FORMAT_RG_SINT8; 134 135 case GL_R32I: 136 return MESA_FORMAT_R_SINT32; 137 138 case GL_R16I: 139 return MESA_FORMAT_R_SINT16; 140 141 case GL_R8I: 142 return MESA_FORMAT_R_SINT8; 143 144 case GL_RGBA16: 145 return MESA_FORMAT_RGBA_UNORM16; 146 147 case GL_RGB10_A2: 148 return MESA_FORMAT_R10G10B10A2_UNORM; 149 150 case GL_RGBA8: 151 return MESA_FORMAT_RGBA_8; 152 153 case GL_RG16: 154 return MESA_FORMAT_RG_16; 155 156 case GL_RG8: 157 return MESA_FORMAT_RG_8; 158 159 case GL_R16: 160 return MESA_FORMAT_R_UNORM16; 161 162 case GL_R8: 163 return MESA_FORMAT_R_UNORM8; 164 165 case GL_RGBA16_SNORM: 166 return MESA_FORMAT_RGBA_SNORM16; 167 168 case GL_RGBA8_SNORM: 169 return MESA_FORMAT_SIGNED_RGBA_8; 170 171 case GL_RG16_SNORM: 172 return MESA_FORMAT_SIGNED_RG_16; 173 174 case GL_RG8_SNORM: 175 return MESA_FORMAT_SIGNED_RG_8; 176 177 case GL_R16_SNORM: 178 return MESA_FORMAT_R_SNORM16; 179 180 case GL_R8_SNORM: 181 return MESA_FORMAT_R_SNORM8; 182 183 default: 184 return MESA_FORMAT_NONE; 185 } 186 } 187 188 enum image_format_class 189 { 190 /** Not a valid image format. */ 191 IMAGE_FORMAT_CLASS_NONE = 0, 192 193 /** Classes of image formats you can cast into each other. */ 194 /** \{ */ 195 IMAGE_FORMAT_CLASS_1X8, 196 IMAGE_FORMAT_CLASS_1X16, 197 IMAGE_FORMAT_CLASS_1X32, 198 IMAGE_FORMAT_CLASS_2X8, 199 IMAGE_FORMAT_CLASS_2X16, 200 IMAGE_FORMAT_CLASS_2X32, 201 IMAGE_FORMAT_CLASS_10_11_11, 202 IMAGE_FORMAT_CLASS_4X8, 203 IMAGE_FORMAT_CLASS_4X16, 204 IMAGE_FORMAT_CLASS_4X32, 205 IMAGE_FORMAT_CLASS_2_10_10_10 206 /** \} */ 207 }; 208 209 static enum image_format_class 210 get_image_format_class(mesa_format format) 211 { 212 switch (format) { 213 case MESA_FORMAT_RGBA_FLOAT32: 214 return IMAGE_FORMAT_CLASS_4X32; 215 216 case MESA_FORMAT_RGBA_FLOAT16: 217 return IMAGE_FORMAT_CLASS_4X16; 218 219 case MESA_FORMAT_RG_FLOAT32: 220 return IMAGE_FORMAT_CLASS_2X32; 221 222 case MESA_FORMAT_RG_FLOAT16: 223 return IMAGE_FORMAT_CLASS_2X16; 224 225 case MESA_FORMAT_R11G11B10_FLOAT: 226 return IMAGE_FORMAT_CLASS_10_11_11; 227 228 case MESA_FORMAT_R_FLOAT32: 229 return IMAGE_FORMAT_CLASS_1X32; 230 231 case MESA_FORMAT_R_FLOAT16: 232 return IMAGE_FORMAT_CLASS_1X16; 233 234 case MESA_FORMAT_RGBA_UINT32: 235 return IMAGE_FORMAT_CLASS_4X32; 236 237 case MESA_FORMAT_RGBA_UINT16: 238 return IMAGE_FORMAT_CLASS_4X16; 239 240 case MESA_FORMAT_R10G10B10A2_UINT: 241 return IMAGE_FORMAT_CLASS_2_10_10_10; 242 243 case MESA_FORMAT_RGBA_UINT8: 244 return IMAGE_FORMAT_CLASS_4X8; 245 246 case MESA_FORMAT_RG_UINT32: 247 return IMAGE_FORMAT_CLASS_2X32; 248 249 case MESA_FORMAT_RG_UINT16: 250 return IMAGE_FORMAT_CLASS_2X16; 251 252 case MESA_FORMAT_RG_UINT8: 253 return IMAGE_FORMAT_CLASS_2X8; 254 255 case MESA_FORMAT_R_UINT32: 256 return IMAGE_FORMAT_CLASS_1X32; 257 258 case MESA_FORMAT_R_UINT16: 259 return IMAGE_FORMAT_CLASS_1X16; 260 261 case MESA_FORMAT_R_UINT8: 262 return IMAGE_FORMAT_CLASS_1X8; 263 264 case MESA_FORMAT_RGBA_SINT32: 265 return IMAGE_FORMAT_CLASS_4X32; 266 267 case MESA_FORMAT_RGBA_SINT16: 268 return IMAGE_FORMAT_CLASS_4X16; 269 270 case MESA_FORMAT_RGBA_SINT8: 271 return IMAGE_FORMAT_CLASS_4X8; 272 273 case MESA_FORMAT_RG_SINT32: 274 return IMAGE_FORMAT_CLASS_2X32; 275 276 case MESA_FORMAT_RG_SINT16: 277 return IMAGE_FORMAT_CLASS_2X16; 278 279 case MESA_FORMAT_RG_SINT8: 280 return IMAGE_FORMAT_CLASS_2X8; 281 282 case MESA_FORMAT_R_SINT32: 283 return IMAGE_FORMAT_CLASS_1X32; 284 285 case MESA_FORMAT_R_SINT16: 286 return IMAGE_FORMAT_CLASS_1X16; 287 288 case MESA_FORMAT_R_SINT8: 289 return IMAGE_FORMAT_CLASS_1X8; 290 291 case MESA_FORMAT_RGBA_UNORM16: 292 return IMAGE_FORMAT_CLASS_4X16; 293 294 case MESA_FORMAT_R10G10B10A2_UNORM: 295 return IMAGE_FORMAT_CLASS_2_10_10_10; 296 297 case MESA_FORMAT_RGBA_8: 298 return IMAGE_FORMAT_CLASS_4X8; 299 300 case MESA_FORMAT_RG_16: 301 return IMAGE_FORMAT_CLASS_2X16; 302 303 case MESA_FORMAT_RG_8: 304 return IMAGE_FORMAT_CLASS_2X8; 305 306 case MESA_FORMAT_R_UNORM16: 307 return IMAGE_FORMAT_CLASS_1X16; 308 309 case MESA_FORMAT_R_UNORM8: 310 return IMAGE_FORMAT_CLASS_1X8; 311 312 case MESA_FORMAT_RGBA_SNORM16: 313 return IMAGE_FORMAT_CLASS_4X16; 314 315 case MESA_FORMAT_SIGNED_RGBA_8: 316 return IMAGE_FORMAT_CLASS_4X8; 317 318 case MESA_FORMAT_SIGNED_RG_16: 319 return IMAGE_FORMAT_CLASS_2X16; 320 321 case MESA_FORMAT_SIGNED_RG_8: 322 return IMAGE_FORMAT_CLASS_2X8; 323 324 case MESA_FORMAT_R_SNORM16: 325 return IMAGE_FORMAT_CLASS_1X16; 326 327 case MESA_FORMAT_R_SNORM8: 328 return IMAGE_FORMAT_CLASS_1X8; 329 330 default: 331 return IMAGE_FORMAT_CLASS_NONE; 332 } 333 } 334 335 static GLenum 336 _image_format_class_to_glenum(enum image_format_class class) 337 { 338 switch (class) { 339 case IMAGE_FORMAT_CLASS_NONE: 340 return GL_NONE; 341 case IMAGE_FORMAT_CLASS_1X8: 342 return GL_IMAGE_CLASS_1_X_8; 343 case IMAGE_FORMAT_CLASS_1X16: 344 return GL_IMAGE_CLASS_1_X_16; 345 case IMAGE_FORMAT_CLASS_1X32: 346 return GL_IMAGE_CLASS_1_X_32; 347 case IMAGE_FORMAT_CLASS_2X8: 348 return GL_IMAGE_CLASS_2_X_8; 349 case IMAGE_FORMAT_CLASS_2X16: 350 return GL_IMAGE_CLASS_2_X_16; 351 case IMAGE_FORMAT_CLASS_2X32: 352 return GL_IMAGE_CLASS_2_X_32; 353 case IMAGE_FORMAT_CLASS_10_11_11: 354 return GL_IMAGE_CLASS_11_11_10; 355 case IMAGE_FORMAT_CLASS_4X8: 356 return GL_IMAGE_CLASS_4_X_8; 357 case IMAGE_FORMAT_CLASS_4X16: 358 return GL_IMAGE_CLASS_4_X_16; 359 case IMAGE_FORMAT_CLASS_4X32: 360 return GL_IMAGE_CLASS_4_X_32; 361 case IMAGE_FORMAT_CLASS_2_10_10_10: 362 return GL_IMAGE_CLASS_10_10_10_2; 363 default: 364 assert(!"Invalid image_format_class"); 365 return GL_NONE; 366 } 367 } 368 369 GLenum 370 _mesa_get_image_format_class(GLenum format) 371 { 372 mesa_format tex_format = _mesa_get_shader_image_format(format); 373 if (tex_format == MESA_FORMAT_NONE) 374 return GL_NONE; 375 376 enum image_format_class class = get_image_format_class(tex_format); 377 return _image_format_class_to_glenum(class); 378 } 379 380 bool 381 _mesa_is_shader_image_format_supported(const struct gl_context *ctx, 382 GLenum format) 383 { 384 switch (format) { 385 /* Formats supported on both desktop and ES GL, c.f. table 8.27 of the 386 * OpenGL ES 3.1 specification. 387 */ 388 case GL_RGBA32F: 389 case GL_RGBA16F: 390 case GL_R32F: 391 case GL_RGBA32UI: 392 case GL_RGBA16UI: 393 case GL_RGBA8UI: 394 case GL_R32UI: 395 case GL_RGBA32I: 396 case GL_RGBA16I: 397 case GL_RGBA8I: 398 case GL_R32I: 399 case GL_RGBA8: 400 case GL_RGBA8_SNORM: 401 return true; 402 403 /* Formats supported on unextended desktop GL and the original 404 * ARB_shader_image_load_store extension, c.f. table 3.21 of the OpenGL 4.2 405 * specification or by GLES 3.1 with GL_NV_image_formats extension. 406 */ 407 case GL_RG32F: 408 case GL_RG16F: 409 case GL_R11F_G11F_B10F: 410 case GL_R16F: 411 case GL_RGB10_A2UI: 412 case GL_RG32UI: 413 case GL_RG16UI: 414 case GL_RG8UI: 415 case GL_R16UI: 416 case GL_R8UI: 417 case GL_RG32I: 418 case GL_RG16I: 419 case GL_RG8I: 420 case GL_R16I: 421 case GL_R8I: 422 case GL_RGB10_A2: 423 case GL_RG8: 424 case GL_R8: 425 case GL_RG8_SNORM: 426 case GL_R8_SNORM: 427 return true; 428 429 /* Formats supported on unextended desktop GL and the original 430 * ARB_shader_image_load_store extension, c.f. table 3.21 of the OpenGL 4.2 431 * specification. 432 * 433 * These can be supported by GLES 3.1 with GL_NV_image_formats & 434 * GL_EXT_texture_norm16 extensions but we don't have support for the 435 * latter in Mesa yet. 436 */ 437 case GL_RGBA16: 438 case GL_RGBA16_SNORM: 439 case GL_RG16: 440 case GL_RG16_SNORM: 441 case GL_R16: 442 case GL_R16_SNORM: 443 return _mesa_is_desktop_gl(ctx); 444 445 default: 446 return false; 447 } 448 } 449 450 struct gl_image_unit 451 _mesa_default_image_unit(struct gl_context *ctx) 452 { 453 const GLenum format = _mesa_is_desktop_gl(ctx) ? GL_R8 : GL_R32UI; 454 const struct gl_image_unit u = { 455 .Access = GL_READ_ONLY, 456 .Format = format, 457 ._ActualFormat = _mesa_get_shader_image_format(format) 458 }; 459 return u; 460 } 461 462 void 463 _mesa_init_image_units(struct gl_context *ctx) 464 { 465 unsigned i; 466 467 for (i = 0; i < ARRAY_SIZE(ctx->ImageUnits); ++i) 468 ctx->ImageUnits[i] = _mesa_default_image_unit(ctx); 469 } 470 471 GLboolean 472 _mesa_is_image_unit_valid(struct gl_context *ctx, struct gl_image_unit *u) 473 { 474 struct gl_texture_object *t = u->TexObj; 475 mesa_format tex_format; 476 477 if (!t) 478 return GL_FALSE; 479 480 /* The GL 4.5 Core spec doesn't say anything about buffers. In practice, 481 * the image buffer format is always compatible with the underlying 482 * buffer storage. 483 */ 484 if (t->Target == GL_TEXTURE_BUFFER) 485 return GL_TRUE; 486 487 if (!t->_BaseComplete && !t->_MipmapComplete) 488 _mesa_test_texobj_completeness(ctx, t); 489 490 if (u->Level < t->BaseLevel || 491 u->Level > t->_MaxLevel || 492 (u->Level == t->BaseLevel && !t->_BaseComplete) || 493 (u->Level != t->BaseLevel && !t->_MipmapComplete)) 494 return GL_FALSE; 495 496 if (_mesa_tex_target_is_layered(t->Target) && 497 u->_Layer >= _mesa_get_texture_layers(t, u->Level)) 498 return GL_FALSE; 499 500 struct gl_texture_image *img = (t->Target == GL_TEXTURE_CUBE_MAP ? 501 t->Image[u->_Layer][u->Level] : 502 t->Image[0][u->Level]); 503 504 if (!img || img->Border || img->NumSamples > ctx->Const.MaxImageSamples) 505 return GL_FALSE; 506 507 tex_format = _mesa_get_shader_image_format(img->InternalFormat); 508 if (!tex_format) 509 return GL_FALSE; 510 511 switch (t->ImageFormatCompatibilityType) { 512 case GL_IMAGE_FORMAT_COMPATIBILITY_BY_SIZE: 513 if (_mesa_get_format_bytes(tex_format) != 514 _mesa_get_format_bytes(u->_ActualFormat)) 515 return GL_FALSE; 516 break; 517 518 case GL_IMAGE_FORMAT_COMPATIBILITY_BY_CLASS: 519 if (get_image_format_class(tex_format) != 520 get_image_format_class(u->_ActualFormat)) 521 return GL_FALSE; 522 break; 523 524 default: 525 assert(!"Unexpected image format compatibility type"); 526 } 527 528 return GL_TRUE; 529 } 530 531 static GLboolean 532 validate_bind_image_texture(struct gl_context *ctx, GLuint unit, 533 GLuint texture, GLint level, GLint layer, 534 GLenum access, GLenum format) 535 { 536 assert(ctx->Const.MaxImageUnits <= MAX_IMAGE_UNITS); 537 538 if (unit >= ctx->Const.MaxImageUnits) { 539 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(unit)"); 540 return GL_FALSE; 541 } 542 543 if (level < 0) { 544 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(level)"); 545 return GL_FALSE; 546 } 547 548 if (layer < 0) { 549 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(layer)"); 550 return GL_FALSE; 551 } 552 553 if (access != GL_READ_ONLY && 554 access != GL_WRITE_ONLY && 555 access != GL_READ_WRITE) { 556 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(access)"); 557 return GL_FALSE; 558 } 559 560 if (!_mesa_is_shader_image_format_supported(ctx, format)) { 561 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(format)"); 562 return GL_FALSE; 563 } 564 565 return GL_TRUE; 566 } 567 568 static void 569 set_image_binding(struct gl_image_unit *u, struct gl_texture_object *texObj, 570 GLint level, GLboolean layered, GLint layer, GLenum access, 571 GLenum format) 572 { 573 u->Level = level; 574 u->Access = access; 575 u->Format = format; 576 u->_ActualFormat = _mesa_get_shader_image_format(format); 577 578 if (texObj && _mesa_tex_target_is_layered(texObj->Target)) { 579 u->Layered = layered; 580 u->Layer = layer; 581 u->_Layer = (u->Layered ? 0 : u->Layer); 582 } else { 583 u->Layered = GL_FALSE; 584 u->Layer = 0; 585 } 586 587 _mesa_reference_texobj(&u->TexObj, texObj); 588 } 589 590 static void 591 bind_image_texture(struct gl_context *ctx, struct gl_texture_object *texObj, 592 GLuint unit, GLint level, GLboolean layered, GLint layer, 593 GLenum access, GLenum format) 594 { 595 struct gl_image_unit *u; 596 597 u = &ctx->ImageUnits[unit]; 598 599 FLUSH_VERTICES(ctx, 0); 600 ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits; 601 602 set_image_binding(u, texObj, level, layered, layer, access, format); 603 } 604 605 void GLAPIENTRY 606 _mesa_BindImageTexture_no_error(GLuint unit, GLuint texture, GLint level, 607 GLboolean layered, GLint layer, GLenum access, 608 GLenum format) 609 { 610 struct gl_texture_object *texObj = NULL; 611 612 GET_CURRENT_CONTEXT(ctx); 613 614 if (texture) 615 texObj = _mesa_lookup_texture(ctx, texture); 616 617 bind_image_texture(ctx, texObj, unit, level, layered, layer, access, format); 618 } 619 620 void GLAPIENTRY 621 _mesa_BindImageTexture(GLuint unit, GLuint texture, GLint level, 622 GLboolean layered, GLint layer, GLenum access, 623 GLenum format) 624 { 625 struct gl_texture_object *texObj = NULL; 626 627 GET_CURRENT_CONTEXT(ctx); 628 629 if (!validate_bind_image_texture(ctx, unit, texture, level, layer, access, 630 format)) 631 return; 632 633 if (texture) { 634 texObj = _mesa_lookup_texture(ctx, texture); 635 636 if (!texObj) { 637 _mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(texture)"); 638 return; 639 } 640 641 /* From section 8.22 "Texture Image Loads and Stores" of the OpenGL ES 642 * 3.1 spec: 643 * 644 * "An INVALID_OPERATION error is generated if texture is not the name 645 * of an immutable texture object." 646 * 647 * However note that issue 7 of the GL_OES_texture_buffer spec 648 * recognizes that there is no way to create immutable buffer textures, 649 * so those are excluded from this requirement. 650 */ 651 if (_mesa_is_gles(ctx) && !texObj->Immutable && 652 texObj->Target != GL_TEXTURE_BUFFER) { 653 _mesa_error(ctx, GL_INVALID_OPERATION, 654 "glBindImageTexture(!immutable)"); 655 return; 656 } 657 } 658 659 bind_image_texture(ctx, texObj, unit, level, layered, layer, access, format); 660 } 661 662 static ALWAYS_INLINE void 663 bind_image_textures(struct gl_context *ctx, GLuint first, GLuint count, 664 const GLuint *textures, bool no_error) 665 { 666 int i; 667 668 /* Assume that at least one binding will be changed */ 669 FLUSH_VERTICES(ctx, 0); 670 ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits; 671 672 /* Note that the error semantics for multi-bind commands differ from 673 * those of other GL commands. 674 * 675 * The Issues section in the ARB_multi_bind spec says: 676 * 677 * "(11) Typically, OpenGL specifies that if an error is generated by 678 * a command, that command has no effect. This is somewhat 679 * unfortunate for multi-bind commands, because it would require 680 * a first pass to scan the entire list of bound objects for 681 * errors and then a second pass to actually perform the 682 * bindings. Should we have different error semantics? 683 * 684 * RESOLVED: Yes. In this specification, when the parameters for 685 * one of the <count> binding points are invalid, that binding 686 * point is not updated and an error will be generated. However, 687 * other binding points in the same command will be updated if 688 * their parameters are valid and no other error occurs." 689 */ 690 691 _mesa_HashLockMutex(ctx->Shared->TexObjects); 692 693 for (i = 0; i < count; i++) { 694 struct gl_image_unit *u = &ctx->ImageUnits[first + i]; 695 const GLuint texture = textures ? textures[i] : 0; 696 697 if (texture) { 698 struct gl_texture_object *texObj = u->TexObj; 699 GLenum tex_format; 700 701 if (!texObj || texObj->Name != texture) { 702 texObj = _mesa_lookup_texture_locked(ctx, texture); 703 if (!no_error && !texObj) { 704 /* The ARB_multi_bind spec says: 705 * 706 * "An INVALID_OPERATION error is generated if any value 707 * in <textures> is not zero or the name of an existing 708 * texture object (per binding)." 709 */ 710 _mesa_error(ctx, GL_INVALID_OPERATION, 711 "glBindImageTextures(textures[%d]=%u " 712 "is not zero or the name of an existing texture " 713 "object)", i, texture); 714 continue; 715 } 716 } 717 718 if (texObj->Target == GL_TEXTURE_BUFFER) { 719 tex_format = texObj->BufferObjectFormat; 720 } else { 721 struct gl_texture_image *image = texObj->Image[0][0]; 722 723 if (!no_error && (!image || image->Width == 0 || 724 image->Height == 0 || image->Depth == 0)) { 725 /* The ARB_multi_bind spec says: 726 * 727 * "An INVALID_OPERATION error is generated if the width, 728 * height, or depth of the level zero texture image of 729 * any texture in <textures> is zero (per binding)." 730 */ 731 _mesa_error(ctx, GL_INVALID_OPERATION, 732 "glBindImageTextures(the width, height or depth " 733 "of the level zero texture image of " 734 "textures[%d]=%u is zero)", i, texture); 735 continue; 736 } 737 738 tex_format = image->InternalFormat; 739 } 740 741 if (!no_error && 742 !_mesa_is_shader_image_format_supported(ctx, tex_format)) { 743 /* The ARB_multi_bind spec says: 744 * 745 * "An INVALID_OPERATION error is generated if the internal 746 * format of the level zero texture image of any texture 747 * in <textures> is not found in table 8.33 (per binding)." 748 */ 749 _mesa_error(ctx, GL_INVALID_OPERATION, 750 "glBindImageTextures(the internal format %s of " 751 "the level zero texture image of textures[%d]=%u " 752 "is not supported)", 753 _mesa_enum_to_string(tex_format), 754 i, texture); 755 continue; 756 } 757 758 /* Update the texture binding */ 759 set_image_binding(u, texObj, 0, 760 _mesa_tex_target_is_layered(texObj->Target), 761 0, GL_READ_WRITE, tex_format); 762 } else { 763 /* Unbind the texture from the unit */ 764 set_image_binding(u, NULL, 0, GL_FALSE, 0, GL_READ_ONLY, GL_R8); 765 } 766 } 767 768 _mesa_HashUnlockMutex(ctx->Shared->TexObjects); 769 } 770 771 void GLAPIENTRY 772 _mesa_BindImageTextures_no_error(GLuint first, GLsizei count, 773 const GLuint *textures) 774 { 775 GET_CURRENT_CONTEXT(ctx); 776 777 bind_image_textures(ctx, first, count, textures, true); 778 } 779 780 void GLAPIENTRY 781 _mesa_BindImageTextures(GLuint first, GLsizei count, const GLuint *textures) 782 { 783 GET_CURRENT_CONTEXT(ctx); 784 785 if (!ctx->Extensions.ARB_shader_image_load_store) { 786 _mesa_error(ctx, GL_INVALID_OPERATION, "glBindImageTextures()"); 787 return; 788 } 789 790 if (first + count > ctx->Const.MaxImageUnits) { 791 /* The ARB_multi_bind spec says: 792 * 793 * "An INVALID_OPERATION error is generated if <first> + <count> 794 * is greater than the number of image units supported by 795 * the implementation." 796 */ 797 _mesa_error(ctx, GL_INVALID_OPERATION, 798 "glBindImageTextures(first=%u + count=%d > the value of " 799 "GL_MAX_IMAGE_UNITS=%u)", 800 first, count, ctx->Const.MaxImageUnits); 801 return; 802 } 803 804 bind_image_textures(ctx, first, count, textures, false); 805 } 806
