renderbuffer.c revision b955474093445d6e5b8c5d3cfa69e2752a01bcf8
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.5 4 * 5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included 15 * in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 26/** 27 * Functions for allocating/managing renderbuffers. 28 * Also, routines for reading/writing software-based renderbuffer data as 29 * ubytes, ushorts, uints, etc. 30 * 31 * The 'alpha8' renderbuffer is interesting. It's used to add a software-based 32 * alpha channel to RGB renderbuffers. This is done by wrapping the RGB 33 * renderbuffer with the alpha renderbuffer. We can do this because of the 34 * OO-nature of renderbuffers. 35 * 36 * Down the road we'll use this for run-time support of 8, 16 and 32-bit 37 * color channels. For example, Mesa may use 32-bit/float color channels 38 * internally (swrast) and use wrapper renderbuffers to convert 32-bit 39 * values down to 16 or 8-bit values for whatever kind of framebuffer we have. 40 */ 41 42 43#include "glheader.h" 44#include "imports.h" 45#include "context.h" 46#include "mtypes.h" 47#include "fbobject.h" 48#include "renderbuffer.h" 49 50 51/* 32-bit color index format. Not a public format. */ 52#define COLOR_INDEX32 0x424243 53 54 55/* 56 * Routines for get/put values in common buffer formats follow. 57 * Someday add support for arbitrary row stride to make them more 58 * flexible. 59 */ 60 61/********************************************************************** 62 * Functions for buffers of 1 X GLubyte values. 63 * Typically stencil. 64 */ 65 66static void * 67get_pointer_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, 68 GLint x, GLint y) 69{ 70 if (!rb->Data) 71 return NULL; 72 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 73 return (GLubyte *) rb->Data + y * rb->Width + x; 74} 75 76 77static void 78get_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 79 GLint x, GLint y, void *values) 80{ 81 const GLubyte *src = (const GLubyte *) rb->Data + y * rb->Width + x; 82 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 83 _mesa_memcpy(values, src, count * sizeof(GLubyte)); 84} 85 86 87static void 88get_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 89 const GLint x[], const GLint y[], void *values) 90{ 91 GLubyte *dst = (GLubyte *) values; 92 GLuint i; 93 assert(rb->DataType == GL_UNSIGNED_BYTE); 94 for (i = 0; i < count; i++) { 95 const GLubyte *src = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 96 dst[i] = *src; 97 } 98} 99 100 101static void 102put_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 103 GLint x, GLint y, const void *values, const GLubyte *mask) 104{ 105 const GLubyte *src = (const GLubyte *) values; 106 GLubyte *dst = (GLubyte *) rb->Data + y * rb->Width + x; 107 assert(rb->DataType == GL_UNSIGNED_BYTE); 108 if (mask) { 109 GLuint i; 110 for (i = 0; i < count; i++) { 111 if (mask[i]) { 112 dst[i] = src[i]; 113 } 114 } 115 } 116 else { 117 _mesa_memcpy(dst, values, count * sizeof(GLubyte)); 118 } 119} 120 121 122static void 123put_mono_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 124 GLint x, GLint y, const void *value, const GLubyte *mask) 125{ 126 const GLubyte val = *((const GLubyte *) value); 127 GLubyte *dst = (GLubyte *) rb->Data + y * rb->Width + x; 128 assert(rb->DataType == GL_UNSIGNED_BYTE); 129 if (mask) { 130 GLuint i; 131 for (i = 0; i < count; i++) { 132 if (mask[i]) { 133 dst[i] = val; 134 } 135 } 136 } 137 else { 138 GLuint i; 139 for (i = 0; i < count; i++) { 140 dst[i] = val; 141 } 142 } 143} 144 145 146static void 147put_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 148 const GLint x[], const GLint y[], 149 const void *values, const GLubyte *mask) 150{ 151 const GLubyte *src = (const GLubyte *) values; 152 GLuint i; 153 assert(rb->DataType == GL_UNSIGNED_BYTE); 154 for (i = 0; i < count; i++) { 155 if (!mask || mask[i]) { 156 GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 157 *dst = src[i]; 158 } 159 } 160} 161 162 163static void 164put_mono_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 165 const GLint x[], const GLint y[], 166 const void *value, const GLubyte *mask) 167{ 168 const GLubyte val = *((const GLubyte *) value); 169 GLuint i; 170 assert(rb->DataType == GL_UNSIGNED_BYTE); 171 for (i = 0; i < count; i++) { 172 if (!mask || mask[i]) { 173 GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 174 *dst = val; 175 } 176 } 177} 178 179 180/********************************************************************** 181 * Functions for buffers of 1 X GLushort values. 182 * Typically depth/Z. 183 */ 184 185static void * 186get_pointer_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, 187 GLint x, GLint y) 188{ 189 if (!rb->Data) 190 return NULL; 191 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 192 ASSERT(rb->Width > 0); 193 return (GLushort *) rb->Data + y * rb->Width + x; 194} 195 196 197static void 198get_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 199 GLint x, GLint y, void *values) 200{ 201 const void *src = rb->GetPointer(ctx, rb, x, y); 202 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 203 _mesa_memcpy(values, src, count * sizeof(GLushort)); 204} 205 206 207static void 208get_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 209 const GLint x[], const GLint y[], void *values) 210{ 211 GLushort *dst = (GLushort *) values; 212 GLuint i; 213 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 214 for (i = 0; i < count; i++) { 215 const GLushort *src = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 216 dst[i] = *src; 217 } 218} 219 220 221static void 222put_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 223 GLint x, GLint y, const void *values, const GLubyte *mask) 224{ 225 const GLushort *src = (const GLushort *) values; 226 GLushort *dst = (GLushort *) rb->Data + y * rb->Width + x; 227 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 228 if (mask) { 229 GLuint i; 230 for (i = 0; i < count; i++) { 231 if (mask[i]) { 232 dst[i] = src[i]; 233 } 234 } 235 } 236 else { 237 _mesa_memcpy(dst, src, count * sizeof(GLushort)); 238 } 239} 240 241 242static void 243put_mono_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 244 GLint x, GLint y, const void *value, const GLubyte *mask) 245{ 246 const GLushort val = *((const GLushort *) value); 247 GLushort *dst = (GLushort *) rb->Data + y * rb->Width + x; 248 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 249 if (mask) { 250 GLuint i; 251 for (i = 0; i < count; i++) { 252 if (mask[i]) { 253 dst[i] = val; 254 } 255 } 256 } 257 else { 258 GLuint i; 259 for (i = 0; i < count; i++) { 260 dst[i] = val; 261 } 262 } 263} 264 265 266static void 267put_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 268 const GLint x[], const GLint y[], const void *values, 269 const GLubyte *mask) 270{ 271 const GLushort *src = (const GLushort *) values; 272 GLuint i; 273 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 274 for (i = 0; i < count; i++) { 275 if (!mask || mask[i]) { 276 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 277 *dst = src[i]; 278 } 279 } 280} 281 282 283static void 284put_mono_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, 285 GLuint count, const GLint x[], const GLint y[], 286 const void *value, const GLubyte *mask) 287{ 288 const GLushort val = *((const GLushort *) value); 289 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 290 if (mask) { 291 GLuint i; 292 for (i = 0; i < count; i++) { 293 if (mask[i]) { 294 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 295 *dst = val; 296 } 297 } 298 } 299 else { 300 GLuint i; 301 for (i = 0; i < count; i++) { 302 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 303 *dst = val; 304 } 305 } 306} 307 308 309/********************************************************************** 310 * Functions for buffers of 1 X GLuint values. 311 * Typically depth/Z or color index. 312 */ 313 314static void * 315get_pointer_uint(GLcontext *ctx, struct gl_renderbuffer *rb, 316 GLint x, GLint y) 317{ 318 if (!rb->Data) 319 return NULL; 320 ASSERT(rb->DataType == GL_UNSIGNED_INT); 321 return (GLuint *) rb->Data + y * rb->Width + x; 322} 323 324 325static void 326get_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 327 GLint x, GLint y, void *values) 328{ 329 const void *src = rb->GetPointer(ctx, rb, x, y); 330 ASSERT(rb->DataType == GL_UNSIGNED_INT); 331 _mesa_memcpy(values, src, count * sizeof(GLuint)); 332} 333 334 335static void 336get_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 337 const GLint x[], const GLint y[], void *values) 338{ 339 GLuint *dst = (GLuint *) values; 340 GLuint i; 341 ASSERT(rb->DataType == GL_UNSIGNED_INT); 342 for (i = 0; i < count; i++) { 343 const GLuint *src = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 344 dst[i] = *src; 345 } 346} 347 348 349static void 350put_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 351 GLint x, GLint y, const void *values, const GLubyte *mask) 352{ 353 const GLuint *src = (const GLuint *) values; 354 GLuint *dst = (GLuint *) rb->Data + y * rb->Width + x; 355 ASSERT(rb->DataType == GL_UNSIGNED_INT); 356 if (mask) { 357 GLuint i; 358 for (i = 0; i < count; i++) { 359 if (mask[i]) { 360 dst[i] = src[i]; 361 } 362 } 363 } 364 else { 365 _mesa_memcpy(dst, src, count * sizeof(GLuint)); 366 } 367} 368 369 370static void 371put_mono_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 372 GLint x, GLint y, const void *value, const GLubyte *mask) 373{ 374 const GLuint val = *((const GLuint *) value); 375 GLuint *dst = (GLuint *) rb->Data + y * rb->Width + x; 376 ASSERT(rb->DataType == GL_UNSIGNED_INT); 377 if (mask) { 378 GLuint i; 379 for (i = 0; i < count; i++) { 380 if (mask[i]) { 381 dst[i] = val; 382 } 383 } 384 } 385 else { 386 GLuint i; 387 for (i = 0; i < count; i++) { 388 dst[i] = val; 389 } 390 } 391} 392 393 394static void 395put_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 396 const GLint x[], const GLint y[], const void *values, 397 const GLubyte *mask) 398{ 399 const GLuint *src = (const GLuint *) values; 400 GLuint i; 401 ASSERT(rb->DataType == GL_UNSIGNED_INT); 402 for (i = 0; i < count; i++) { 403 if (!mask || mask[i]) { 404 GLuint *dst = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 405 *dst = src[i]; 406 } 407 } 408} 409 410 411static void 412put_mono_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 413 const GLint x[], const GLint y[], const void *value, 414 const GLubyte *mask) 415{ 416 const GLuint val = *((const GLuint *) value); 417 GLuint i; 418 ASSERT(rb->DataType == GL_UNSIGNED_INT); 419 for (i = 0; i < count; i++) { 420 if (!mask || mask[i]) { 421 GLuint *dst = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 422 *dst = val; 423 } 424 } 425} 426 427 428/********************************************************************** 429 * Functions for buffers of 3 X GLubyte (or GLbyte) values. 430 * Typically color buffers. 431 * NOTE: the incoming and outgoing colors are RGBA! We ignore incoming 432 * alpha values and return 255 for outgoing alpha values. 433 */ 434 435static void * 436get_pointer_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, 437 GLint x, GLint y) 438{ 439 /* No direct access since this buffer is RGB but caller will be 440 * treating it as if it were RGBA. 441 */ 442 return NULL; 443} 444 445 446static void 447get_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 448 GLint x, GLint y, void *values) 449{ 450 const GLubyte *src = (const GLubyte *) rb->Data + 3 * (y * rb->Width + x); 451 GLubyte *dst = (GLubyte *) values; 452 GLuint i; 453 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 454 for (i = 0; i < count; i++) { 455 dst[i * 4 + 0] = src[i * 3 + 0]; 456 dst[i * 4 + 1] = src[i * 3 + 1]; 457 dst[i * 4 + 2] = src[i * 3 + 2]; 458 dst[i * 4 + 3] = 255; 459 } 460} 461 462 463static void 464get_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 465 const GLint x[], const GLint y[], void *values) 466{ 467 GLubyte *dst = (GLubyte *) values; 468 GLuint i; 469 assert(rb->DataType == GL_UNSIGNED_BYTE); 470 for (i = 0; i < count; i++) { 471 const GLubyte *src 472 = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 473 dst[i * 4 + 0] = src[0]; 474 dst[i * 4 + 1] = src[1]; 475 dst[i * 4 + 2] = src[2]; 476 dst[i * 4 + 3] = 255; 477 } 478} 479 480 481static void 482put_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 483 GLint x, GLint y, const void *values, const GLubyte *mask) 484{ 485 /* note: incoming values are RGB+A! */ 486 const GLubyte *src = (const GLubyte *) values; 487 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 488 GLuint i; 489 assert(rb->DataType == GL_UNSIGNED_BYTE); 490 for (i = 0; i < count; i++) { 491 if (!mask || mask[i]) { 492 dst[i * 3 + 0] = src[i * 4 + 0]; 493 dst[i * 3 + 1] = src[i * 4 + 1]; 494 dst[i * 3 + 2] = src[i * 4 + 2]; 495 } 496 } 497} 498 499 500static void 501put_row_rgb_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 502 GLint x, GLint y, const void *values, const GLubyte *mask) 503{ 504 /* note: incoming values are RGB+A! */ 505 const GLubyte *src = (const GLubyte *) values; 506 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 507 GLuint i; 508 assert(rb->DataType == GL_UNSIGNED_BYTE); 509 for (i = 0; i < count; i++) { 510 if (!mask || mask[i]) { 511 dst[i * 3 + 0] = src[i * 3 + 0]; 512 dst[i * 3 + 1] = src[i * 3 + 1]; 513 dst[i * 3 + 2] = src[i * 3 + 2]; 514 } 515 } 516} 517 518 519static void 520put_mono_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 521 GLint x, GLint y, const void *value, const GLubyte *mask) 522{ 523 /* note: incoming value is RGB+A! */ 524 const GLubyte val0 = ((const GLubyte *) value)[0]; 525 const GLubyte val1 = ((const GLubyte *) value)[1]; 526 const GLubyte val2 = ((const GLubyte *) value)[2]; 527 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 528 assert(rb->DataType == GL_UNSIGNED_BYTE); 529 if (!mask && val0 == val1 && val1 == val2) { 530 /* optimized case */ 531 _mesa_memset(dst, val0, 3 * count); 532 } 533 else { 534 GLuint i; 535 for (i = 0; i < count; i++) { 536 if (!mask || mask[i]) { 537 dst[i * 3 + 0] = val0; 538 dst[i * 3 + 1] = val1; 539 dst[i * 3 + 2] = val2; 540 } 541 } 542 } 543} 544 545 546static void 547put_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 548 const GLint x[], const GLint y[], const void *values, 549 const GLubyte *mask) 550{ 551 /* note: incoming values are RGB+A! */ 552 const GLubyte *src = (const GLubyte *) values; 553 GLuint i; 554 assert(rb->DataType == GL_UNSIGNED_BYTE); 555 for (i = 0; i < count; i++) { 556 if (!mask || mask[i]) { 557 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 558 dst[0] = src[i * 4 + 0]; 559 dst[1] = src[i * 4 + 1]; 560 dst[2] = src[i * 4 + 2]; 561 } 562 } 563} 564 565 566static void 567put_mono_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, 568 GLuint count, const GLint x[], const GLint y[], 569 const void *value, const GLubyte *mask) 570{ 571 /* note: incoming value is RGB+A! */ 572 const GLubyte val0 = ((const GLubyte *) value)[0]; 573 const GLubyte val1 = ((const GLubyte *) value)[1]; 574 const GLubyte val2 = ((const GLubyte *) value)[2]; 575 GLuint i; 576 assert(rb->DataType == GL_UNSIGNED_BYTE); 577 for (i = 0; i < count; i++) { 578 if (!mask || mask[i]) { 579 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 580 dst[0] = val0; 581 dst[1] = val1; 582 dst[2] = val2; 583 } 584 } 585} 586 587 588/********************************************************************** 589 * Functions for buffers of 4 X GLubyte (or GLbyte) values. 590 * Typically color buffers. 591 */ 592 593static void * 594get_pointer_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, 595 GLint x, GLint y) 596{ 597 if (!rb->Data) 598 return NULL; 599 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 600 return (GLubyte *) rb->Data + 4 * (y * rb->Width + x); 601} 602 603 604static void 605get_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 606 GLint x, GLint y, void *values) 607{ 608 const GLbyte *src = (const GLbyte *) rb->Data + 4 * (y * rb->Width + x); 609 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 610 _mesa_memcpy(values, src, 4 * count * sizeof(GLbyte)); 611} 612 613 614static void 615get_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 616 const GLint x[], const GLint y[], void *values) 617{ 618 /* treat 4*GLubyte as 1*GLuint */ 619 GLuint *dst = (GLuint *) values; 620 GLuint i; 621 assert(rb->DataType == GL_UNSIGNED_BYTE); 622 for (i = 0; i < count; i++) { 623 const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 624 dst[i] = *src; 625 } 626} 627 628 629static void 630put_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 631 GLint x, GLint y, const void *values, const GLubyte *mask) 632{ 633 /* treat 4*GLubyte as 1*GLuint */ 634 const GLuint *src = (const GLuint *) values; 635 GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x); 636 assert(rb->DataType == GL_UNSIGNED_BYTE); 637 if (mask) { 638 GLuint i; 639 for (i = 0; i < count; i++) { 640 if (mask[i]) { 641 dst[i] = src[i]; 642 } 643 } 644 } 645 else { 646 _mesa_memcpy(dst, src, 4 * count * sizeof(GLubyte)); 647 } 648} 649 650 651static void 652put_row_rgb_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 653 GLint x, GLint y, const void *values, const GLubyte *mask) 654{ 655 /* Store RGB values in RGBA buffer */ 656 const GLubyte *src = (const GLubyte *) values; 657 GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->Width + x); 658 GLuint i; 659 assert(rb->DataType == GL_UNSIGNED_BYTE); 660 for (i = 0; i < count; i++) { 661 if (!mask || mask[i]) { 662 dst[i * 4 + 0] = src[i * 3 + 0]; 663 dst[i * 4 + 1] = src[i * 3 + 1]; 664 dst[i * 4 + 2] = src[i * 3 + 2]; 665 dst[i * 4 + 3] = 0xff; 666 } 667 } 668} 669 670 671static void 672put_mono_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 673 GLint x, GLint y, const void *value, const GLubyte *mask) 674{ 675 /* treat 4*GLubyte as 1*GLuint */ 676 const GLuint val = *((const GLuint *) value); 677 GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x); 678 assert(rb->DataType == GL_UNSIGNED_BYTE); 679 if (!mask && val == 0) { 680 /* common case */ 681 _mesa_bzero(dst, count * 4 * sizeof(GLubyte)); 682 } 683 else { 684 /* general case */ 685 if (mask) { 686 GLuint i; 687 for (i = 0; i < count; i++) { 688 if (mask[i]) { 689 dst[i] = val; 690 } 691 } 692 } 693 else { 694 GLuint i; 695 for (i = 0; i < count; i++) { 696 dst[i] = val; 697 } 698 } 699 } 700} 701 702 703static void 704put_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 705 const GLint x[], const GLint y[], const void *values, 706 const GLubyte *mask) 707{ 708 /* treat 4*GLubyte as 1*GLuint */ 709 const GLuint *src = (const GLuint *) values; 710 GLuint i; 711 assert(rb->DataType == GL_UNSIGNED_BYTE); 712 for (i = 0; i < count; i++) { 713 if (!mask || mask[i]) { 714 GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 715 *dst = src[i]; 716 } 717 } 718} 719 720 721static void 722put_mono_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, 723 GLuint count, const GLint x[], const GLint y[], 724 const void *value, const GLubyte *mask) 725{ 726 /* treat 4*GLubyte as 1*GLuint */ 727 const GLuint val = *((const GLuint *) value); 728 GLuint i; 729 assert(rb->DataType == GL_UNSIGNED_BYTE); 730 for (i = 0; i < count; i++) { 731 if (!mask || mask[i]) { 732 GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 733 *dst = val; 734 } 735 } 736} 737 738 739/********************************************************************** 740 * Functions for buffers of 4 X GLushort (or GLshort) values. 741 * Typically accum buffer. 742 */ 743 744static void * 745get_pointer_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, 746 GLint x, GLint y) 747{ 748 if (!rb->Data) 749 return NULL; 750 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 751 return (GLushort *) rb->Data + 4 * (y * rb->Width + x); 752} 753 754 755static void 756get_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 757 GLint x, GLint y, void *values) 758{ 759 const GLshort *src = (const GLshort *) rb->Data + 4 * (y * rb->Width + x); 760 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 761 _mesa_memcpy(values, src, 4 * count * sizeof(GLshort)); 762} 763 764 765static void 766get_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 767 const GLint x[], const GLint y[], void *values) 768{ 769 GLushort *dst = (GLushort *) values; 770 GLuint i; 771 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 772 for (i = 0; i < count; i++) { 773 const GLushort *src 774 = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 775 dst[i] = *src; 776 } 777} 778 779 780static void 781put_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 782 GLint x, GLint y, const void *values, const GLubyte *mask) 783{ 784 const GLushort *src = (const GLushort *) values; 785 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 786 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 787 if (mask) { 788 GLuint i; 789 for (i = 0; i < count; i++) { 790 if (mask[i]) { 791 dst[i * 4 + 0] = src[i * 4 + 0]; 792 dst[i * 4 + 1] = src[i * 4 + 1]; 793 dst[i * 4 + 2] = src[i * 4 + 2]; 794 dst[i * 4 + 3] = src[i * 4 + 3]; 795 } 796 } 797 } 798 else { 799 _mesa_memcpy(dst, src, 4 * count * sizeof(GLushort)); 800 } 801} 802 803 804static void 805put_row_rgb_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 806 GLint x, GLint y, const void *values, const GLubyte *mask) 807{ 808 /* Put RGB values in RGBA buffer */ 809 const GLushort *src = (const GLushort *) values; 810 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 811 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 812 if (mask) { 813 GLuint i; 814 for (i = 0; i < count; i++) { 815 if (mask[i]) { 816 dst[i * 4 + 0] = src[i * 3 + 0]; 817 dst[i * 4 + 1] = src[i * 3 + 1]; 818 dst[i * 4 + 2] = src[i * 3 + 2]; 819 dst[i * 4 + 3] = 0xffff; 820 } 821 } 822 } 823 else { 824 _mesa_memcpy(dst, src, 4 * count * sizeof(GLushort)); 825 } 826} 827 828 829static void 830put_mono_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 831 GLint x, GLint y, const void *value, const GLubyte *mask) 832{ 833 const GLushort val0 = ((const GLushort *) value)[0]; 834 const GLushort val1 = ((const GLushort *) value)[1]; 835 const GLushort val2 = ((const GLushort *) value)[2]; 836 const GLushort val3 = ((const GLushort *) value)[3]; 837 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 838 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 839 if (!mask && val0 == 0 && val1 == 0 && val2 == 0 && val3 == 0) { 840 /* common case for clearing accum buffer */ 841 _mesa_bzero(dst, count * 4 * sizeof(GLushort)); 842 } 843 else { 844 GLuint i; 845 for (i = 0; i < count; i++) { 846 if (!mask || mask[i]) { 847 dst[i * 4 + 0] = val0; 848 dst[i * 4 + 1] = val1; 849 dst[i * 4 + 2] = val2; 850 dst[i * 4 + 3] = val3; 851 } 852 } 853 } 854} 855 856 857static void 858put_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 859 const GLint x[], const GLint y[], const void *values, 860 const GLubyte *mask) 861{ 862 const GLushort *src = (const GLushort *) values; 863 GLuint i; 864 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 865 for (i = 0; i < count; i++) { 866 if (!mask || mask[i]) { 867 GLushort *dst = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 868 dst[0] = src[i * 4 + 0]; 869 dst[1] = src[i * 4 + 1]; 870 dst[2] = src[i * 4 + 2]; 871 dst[3] = src[i * 4 + 3]; 872 } 873 } 874} 875 876 877static void 878put_mono_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, 879 GLuint count, const GLint x[], const GLint y[], 880 const void *value, const GLubyte *mask) 881{ 882 const GLushort val0 = ((const GLushort *) value)[0]; 883 const GLushort val1 = ((const GLushort *) value)[1]; 884 const GLushort val2 = ((const GLushort *) value)[2]; 885 const GLushort val3 = ((const GLushort *) value)[3]; 886 GLuint i; 887 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 888 for (i = 0; i < count; i++) { 889 if (!mask || mask[i]) { 890 GLushort *dst = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 891 dst[0] = val0; 892 dst[1] = val1; 893 dst[2] = val2; 894 dst[3] = val3; 895 } 896 } 897} 898 899 900 901/** 902 * This is a software fallback for the gl_renderbuffer->AllocStorage 903 * function. 904 * Device drivers will typically override this function for the buffers 905 * which it manages (typically color buffers, Z and stencil). 906 * Other buffers (like software accumulation and aux buffers) which the driver 907 * doesn't manage can be handled with this function. 908 * 909 * This one multi-purpose function can allocate stencil, depth, accum, color 910 * or color-index buffers! 911 * 912 * This function also plugs in the appropriate GetPointer, Get/PutRow and 913 * Get/PutValues functions. 914 */ 915static GLboolean 916soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb, 917 GLenum internalFormat, GLuint width, GLuint height) 918{ 919 GLuint pixelSize; 920 921 switch (internalFormat) { 922 case GL_RGB: 923 case GL_R3_G3_B2: 924 case GL_RGB4: 925 case GL_RGB5: 926 case GL_RGB8: 927 case GL_RGB10: 928 case GL_RGB12: 929 case GL_RGB16: 930 rb->_BaseFormat = GL_RGB; 931 rb->DataType = GL_UNSIGNED_BYTE; 932 rb->GetPointer = get_pointer_ubyte3; 933 rb->GetRow = get_row_ubyte3; 934 rb->GetValues = get_values_ubyte3; 935 rb->PutRow = put_row_ubyte3; 936 rb->PutRowRGB = put_row_rgb_ubyte3; 937 rb->PutMonoRow = put_mono_row_ubyte3; 938 rb->PutValues = put_values_ubyte3; 939 rb->PutMonoValues = put_mono_values_ubyte3; 940 rb->RedBits = 8 * sizeof(GLubyte); 941 rb->GreenBits = 8 * sizeof(GLubyte); 942 rb->BlueBits = 8 * sizeof(GLubyte); 943 rb->AlphaBits = 0; 944 pixelSize = 3 * sizeof(GLubyte); 945 break; 946 case GL_RGBA: 947 case GL_RGBA2: 948 case GL_RGBA4: 949 case GL_RGB5_A1: 950 case GL_RGBA8: 951 rb->_BaseFormat = GL_RGBA; 952 rb->DataType = GL_UNSIGNED_BYTE; 953 rb->GetPointer = get_pointer_ubyte4; 954 rb->GetRow = get_row_ubyte4; 955 rb->GetValues = get_values_ubyte4; 956 rb->PutRow = put_row_ubyte4; 957 rb->PutRowRGB = put_row_rgb_ubyte4; 958 rb->PutMonoRow = put_mono_row_ubyte4; 959 rb->PutValues = put_values_ubyte4; 960 rb->PutMonoValues = put_mono_values_ubyte4; 961 rb->RedBits = 8 * sizeof(GLubyte); 962 rb->GreenBits = 8 * sizeof(GLubyte); 963 rb->BlueBits = 8 * sizeof(GLubyte); 964 rb->AlphaBits = 8 * sizeof(GLubyte); 965 pixelSize = 4 * sizeof(GLubyte); 966 break; 967 case GL_RGB10_A2: 968 case GL_RGBA12: 969 case GL_RGBA16: 970 rb->_BaseFormat = GL_RGBA; 971 rb->DataType = GL_UNSIGNED_SHORT; 972 rb->GetPointer = get_pointer_ushort4; 973 rb->GetRow = get_row_ushort4; 974 rb->GetValues = get_values_ushort4; 975 rb->PutRow = put_row_ushort4; 976 rb->PutRowRGB = put_row_rgb_ushort4; 977 rb->PutMonoRow = put_mono_row_ushort4; 978 rb->PutValues = put_values_ushort4; 979 rb->PutMonoValues = put_mono_values_ushort4; 980 rb->RedBits = 8 * sizeof(GLushort); 981 rb->GreenBits = 8 * sizeof(GLushort); 982 rb->BlueBits = 8 * sizeof(GLushort); 983 rb->AlphaBits = 8 * sizeof(GLushort); 984 pixelSize = 4 * sizeof(GLushort); 985 break; 986#if 00 987 case ALPHA8: 988 rb->_BaseFormat = GL_RGBA; /* Yes, not GL_ALPHA! */ 989 rb->DataType = GL_UNSIGNED_BYTE; 990 rb->GetPointer = get_pointer_alpha8; 991 rb->GetRow = get_row_alpha8; 992 rb->GetValues = get_values_alpha8; 993 rb->PutRow = put_row_alpha8; 994 rb->PutRowRGB = NULL; 995 rb->PutMonoRow = put_mono_row_alpha8; 996 rb->PutValues = put_values_alpha8; 997 rb->PutMonoValues = put_mono_values_alpha8; 998 rb->RedBits = 0; /*red*/ 999 rb->GreenBits = 0; /*green*/ 1000 rb->BlueBits = 0; /*blue*/ 1001 rb->AlphaBits = 8 * sizeof(GLubyte); 1002 pixelSize = sizeof(GLubyte); 1003 break; 1004#endif 1005 case GL_STENCIL_INDEX: 1006 case GL_STENCIL_INDEX1_EXT: 1007 case GL_STENCIL_INDEX4_EXT: 1008 case GL_STENCIL_INDEX8_EXT: 1009 rb->_BaseFormat = GL_STENCIL_INDEX; 1010 rb->DataType = GL_UNSIGNED_BYTE; 1011 rb->GetPointer = get_pointer_ubyte; 1012 rb->GetRow = get_row_ubyte; 1013 rb->GetValues = get_values_ubyte; 1014 rb->PutRow = put_row_ubyte; 1015 rb->PutRowRGB = NULL; 1016 rb->PutMonoRow = put_mono_row_ubyte; 1017 rb->PutValues = put_values_ubyte; 1018 rb->PutMonoValues = put_mono_values_ubyte; 1019 rb->StencilBits = 8 * sizeof(GLubyte); 1020 pixelSize = sizeof(GLubyte); 1021 break; 1022 case GL_STENCIL_INDEX16_EXT: 1023 rb->_BaseFormat = GL_STENCIL_INDEX; 1024 rb->DataType = GL_UNSIGNED_SHORT; 1025 rb->GetPointer = get_pointer_ushort; 1026 rb->GetRow = get_row_ushort; 1027 rb->GetValues = get_values_ushort; 1028 rb->PutRow = put_row_ushort; 1029 rb->PutRowRGB = NULL; 1030 rb->PutMonoRow = put_mono_row_ushort; 1031 rb->PutValues = put_values_ushort; 1032 rb->PutMonoValues = put_mono_values_ushort; 1033 rb->StencilBits = 8 * sizeof(GLushort); 1034 pixelSize = sizeof(GLushort); 1035 break; 1036 case GL_DEPTH_COMPONENT: 1037 case GL_DEPTH_COMPONENT16: 1038 rb->_BaseFormat = GL_DEPTH_COMPONENT; 1039 rb->DataType = GL_UNSIGNED_SHORT; 1040 rb->GetPointer = get_pointer_ushort; 1041 rb->GetRow = get_row_ushort; 1042 rb->GetValues = get_values_ushort; 1043 rb->PutRow = put_row_ushort; 1044 rb->PutRowRGB = NULL; 1045 rb->PutMonoRow = put_mono_row_ushort; 1046 rb->PutValues = put_values_ushort; 1047 rb->PutMonoValues = put_mono_values_ushort; 1048 /*rb->DepthBits not set here */ 1049 pixelSize = sizeof(GLushort); 1050 break; 1051 case GL_DEPTH_COMPONENT24: 1052 case GL_DEPTH_COMPONENT32: 1053 rb->_BaseFormat = GL_DEPTH_COMPONENT; 1054 rb->DataType = GL_UNSIGNED_INT; 1055 rb->GetPointer = get_pointer_uint; 1056 rb->GetRow = get_row_uint; 1057 rb->GetValues = get_values_uint; 1058 rb->PutRow = put_row_uint; 1059 rb->PutRowRGB = NULL; 1060 rb->PutMonoRow = put_mono_row_uint; 1061 rb->PutValues = put_values_uint; 1062 rb->PutMonoValues = put_mono_values_uint; 1063 /* rb->DepthBits not set here */ 1064 pixelSize = sizeof(GLuint); 1065 break; 1066 case GL_COLOR_INDEX8_EXT: 1067 rb->_BaseFormat = GL_COLOR_INDEX; 1068 rb->DataType = GL_UNSIGNED_BYTE; 1069 rb->GetPointer = get_pointer_ubyte; 1070 rb->GetRow = get_row_ubyte; 1071 rb->GetValues = get_values_ubyte; 1072 rb->PutRow = put_row_ubyte; 1073 rb->PutRowRGB = NULL; 1074 rb->PutMonoRow = put_mono_row_ubyte; 1075 rb->PutValues = put_values_ubyte; 1076 rb->PutMonoValues = put_mono_values_ubyte; 1077 rb->IndexBits = 8 * sizeof(GLubyte); 1078 pixelSize = sizeof(GLubyte); 1079 break; 1080 case GL_COLOR_INDEX16_EXT: 1081 rb->_BaseFormat = GL_COLOR_INDEX; 1082 rb->DataType = GL_UNSIGNED_SHORT; 1083 rb->GetPointer = get_pointer_ushort; 1084 rb->GetRow = get_row_ushort; 1085 rb->GetValues = get_values_ushort; 1086 rb->PutRow = put_row_ushort; 1087 rb->PutRowRGB = NULL; 1088 rb->PutMonoRow = put_mono_row_ushort; 1089 rb->PutValues = put_values_ushort; 1090 rb->PutMonoValues = put_mono_values_ushort; 1091 rb->IndexBits = 8 * sizeof(GLushort); 1092 pixelSize = sizeof(GLushort); 1093 break; 1094 case COLOR_INDEX32: 1095 rb->_BaseFormat = GL_COLOR_INDEX; 1096 rb->DataType = GL_UNSIGNED_INT; 1097 rb->GetPointer = get_pointer_uint; 1098 rb->GetRow = get_row_uint; 1099 rb->GetValues = get_values_uint; 1100 rb->PutRow = put_row_uint; 1101 rb->PutRowRGB = NULL; 1102 rb->PutMonoRow = put_mono_row_uint; 1103 rb->PutValues = put_values_uint; 1104 rb->PutMonoValues = put_mono_values_uint; 1105 rb->IndexBits = 8 * sizeof(GLuint); 1106 pixelSize = sizeof(GLuint); 1107 break; 1108 default: 1109 _mesa_problem(ctx, "Bad internalFormat in soft_renderbuffer_storage"); 1110 return GL_FALSE; 1111 } 1112 1113 ASSERT(rb->DataType); 1114 ASSERT(rb->GetPointer); 1115 ASSERT(rb->GetRow); 1116 ASSERT(rb->GetValues); 1117 ASSERT(rb->PutRow); 1118 ASSERT(rb->PutMonoRow); 1119 ASSERT(rb->PutValues); 1120 ASSERT(rb->PutMonoValues); 1121 1122 /* free old buffer storage */ 1123 if (rb->Data) 1124 _mesa_free(rb->Data); 1125 1126 /* allocate new buffer storage */ 1127 rb->Data = _mesa_malloc(width * height * pixelSize); 1128 if (rb->Data == NULL) { 1129 rb->Width = 0; 1130 rb->Height = 0; 1131 _mesa_error(ctx, GL_OUT_OF_MEMORY, "software renderbuffer allocation"); 1132 return GL_FALSE; 1133 } 1134 1135 rb->Width = width; 1136 rb->Height = height; 1137 rb->InternalFormat = internalFormat; 1138 1139 return GL_TRUE; 1140} 1141 1142 1143 1144/**********************************************************************/ 1145/**********************************************************************/ 1146/**********************************************************************/ 1147 1148 1149/** 1150 * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha 1151 * buffer wrapper around an existing RGB renderbuffer (hw or sw). 1152 * 1153 * When PutRow is called (for example), we store the alpha values in 1154 * this buffer, then pass on the PutRow call to the wrapped RGB 1155 * buffer. 1156 */ 1157 1158 1159static GLboolean 1160alloc_storage_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1161 GLenum internalFormat, GLuint width, GLuint height) 1162{ 1163 ASSERT(arb != arb->Wrapped); 1164 1165 /* first, pass the call to the wrapped RGB buffer */ 1166 if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat, 1167 width, height)) { 1168 return GL_FALSE; 1169 } 1170 1171 /* next, resize my alpha buffer */ 1172 if (arb->Data) { 1173 _mesa_free(arb->Data); 1174 } 1175 1176 arb->Data = _mesa_malloc(width * height * sizeof(GLubyte)); 1177 if (arb->Data == NULL) { 1178 arb->Width = 0; 1179 arb->Height = 0; 1180 _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation"); 1181 return GL_FALSE; 1182 } 1183 1184 arb->Width = width; 1185 arb->Height = height; 1186 arb->InternalFormat = internalFormat; 1187 1188 return GL_TRUE; 1189} 1190 1191 1192/** 1193 * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer. 1194 */ 1195static void 1196delete_renderbuffer_alpha8(struct gl_renderbuffer *arb) 1197{ 1198 if (arb->Data) { 1199 _mesa_free(arb->Data); 1200 } 1201 ASSERT(arb->Wrapped); 1202 ASSERT(arb != arb->Wrapped); 1203 arb->Wrapped->Delete(arb->Wrapped); 1204 arb->Wrapped = NULL; 1205 _mesa_free(arb); 1206} 1207 1208 1209static void * 1210get_pointer_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1211 GLint x, GLint y) 1212{ 1213 return NULL; /* don't allow direct access! */ 1214} 1215 1216 1217static void 1218get_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1219 GLint x, GLint y, void *values) 1220{ 1221 /* NOTE: 'values' is RGBA format! */ 1222 const GLubyte *src = (const GLubyte *) arb->Data + y * arb->Width + x; 1223 GLubyte *dst = (GLubyte *) values; 1224 GLuint i; 1225 ASSERT(arb != arb->Wrapped); 1226 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1227 /* first, pass the call to the wrapped RGB buffer */ 1228 arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values); 1229 /* second, fill in alpha values from this buffer! */ 1230 for (i = 0; i < count; i++) { 1231 dst[i * 4 + 3] = src[i]; 1232 } 1233} 1234 1235 1236static void 1237get_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1238 const GLint x[], const GLint y[], void *values) 1239{ 1240 GLubyte *dst = (GLubyte *) values; 1241 GLuint i; 1242 ASSERT(arb != arb->Wrapped); 1243 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1244 /* first, pass the call to the wrapped RGB buffer */ 1245 arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values); 1246 /* second, fill in alpha values from this buffer! */ 1247 for (i = 0; i < count; i++) { 1248 const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1249 dst[i * 4 + 3] = *src; 1250 } 1251} 1252 1253 1254static void 1255put_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1256 GLint x, GLint y, const void *values, const GLubyte *mask) 1257{ 1258 const GLubyte *src = (const GLubyte *) values; 1259 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1260 GLuint i; 1261 ASSERT(arb != arb->Wrapped); 1262 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1263 /* first, pass the call to the wrapped RGB buffer */ 1264 arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask); 1265 /* second, store alpha in our buffer */ 1266 for (i = 0; i < count; i++) { 1267 if (!mask || mask[i]) { 1268 dst[i] = src[i * 4 + 3]; 1269 } 1270 } 1271} 1272 1273 1274static void 1275put_row_rgb_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1276 GLint x, GLint y, const void *values, const GLubyte *mask) 1277{ 1278 const GLubyte *src = (const GLubyte *) values; 1279 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1280 GLuint i; 1281 ASSERT(arb != arb->Wrapped); 1282 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1283 /* first, pass the call to the wrapped RGB buffer */ 1284 arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask); 1285 /* second, store alpha in our buffer */ 1286 for (i = 0; i < count; i++) { 1287 if (!mask || mask[i]) { 1288 dst[i] = src[i * 4 + 3]; 1289 } 1290 } 1291} 1292 1293 1294static void 1295put_mono_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1296 GLint x, GLint y, const void *value, const GLubyte *mask) 1297{ 1298 const GLubyte val = ((const GLubyte *) value)[3]; 1299 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1300 ASSERT(arb != arb->Wrapped); 1301 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1302 /* first, pass the call to the wrapped RGB buffer */ 1303 arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask); 1304 /* second, store alpha in our buffer */ 1305 if (mask) { 1306 GLuint i; 1307 for (i = 0; i < count; i++) { 1308 if (mask[i]) { 1309 dst[i] = val; 1310 } 1311 } 1312 } 1313 else { 1314 _mesa_memset(dst, val, count); 1315 } 1316} 1317 1318 1319static void 1320put_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1321 const GLint x[], const GLint y[], 1322 const void *values, const GLubyte *mask) 1323{ 1324 const GLubyte *src = (const GLubyte *) values; 1325 GLuint i; 1326 ASSERT(arb != arb->Wrapped); 1327 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1328 /* first, pass the call to the wrapped RGB buffer */ 1329 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask); 1330 /* second, store alpha in our buffer */ 1331 for (i = 0; i < count; i++) { 1332 if (!mask || mask[i]) { 1333 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1334 *dst = src[i * 4 + 3]; 1335 } 1336 } 1337} 1338 1339 1340static void 1341put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1342 GLuint count, const GLint x[], const GLint y[], 1343 const void *value, const GLubyte *mask) 1344{ 1345 const GLubyte val = ((const GLubyte *) value)[3]; 1346 GLuint i; 1347 ASSERT(arb != arb->Wrapped); 1348 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1349 /* first, pass the call to the wrapped RGB buffer */ 1350 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask); 1351 /* second, store alpha in our buffer */ 1352 for (i = 0; i < count; i++) { 1353 if (!mask || mask[i]) { 1354 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1355 *dst = val; 1356 } 1357 } 1358} 1359 1360 1361 1362/**********************************************************************/ 1363/**********************************************************************/ 1364/**********************************************************************/ 1365 1366 1367/** 1368 * Default GetPointer routine. Always return NULL to indicate that 1369 * direct buffer access is not supported. 1370 */ 1371static void * 1372nop_get_pointer(GLcontext *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) 1373{ 1374 return NULL; 1375} 1376 1377 1378/** 1379 * Initialize the fields of a gl_renderbuffer to default values. 1380 */ 1381void 1382_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) 1383{ 1384 rb->Name = name; 1385 rb->RefCount = 1; 1386 rb->Delete = _mesa_delete_renderbuffer; 1387 1388 /* The rest of these should be set later by the caller of this function or 1389 * the AllocStorage method: 1390 */ 1391 rb->AllocStorage = NULL; 1392 1393 rb->Width = 0; 1394 rb->Height = 0; 1395 rb->InternalFormat = GL_NONE; 1396 rb->_BaseFormat = GL_NONE; 1397 rb->DataType = GL_NONE; 1398 rb->RedBits = rb->GreenBits = rb->BlueBits = rb->AlphaBits = 0; 1399 rb->IndexBits = 0; 1400 rb->DepthBits = 0; 1401 rb->StencilBits = 0; 1402 rb->Data = NULL; 1403 1404 /* Point back to ourself so that we don't have to check for Wrapped==NULL 1405 * all over the drivers. 1406 */ 1407 rb->Wrapped = rb; 1408 1409 rb->GetPointer = nop_get_pointer; 1410 rb->GetRow = NULL; 1411 rb->GetValues = NULL; 1412 rb->PutRow = NULL; 1413 rb->PutRowRGB = NULL; 1414 rb->PutMonoRow = NULL; 1415 rb->PutValues = NULL; 1416 rb->PutMonoValues = NULL; 1417} 1418 1419 1420/** 1421 * Allocate a new gl_renderbuffer object. This can be used for user-created 1422 * renderbuffers or window-system renderbuffers. 1423 */ 1424struct gl_renderbuffer * 1425_mesa_new_renderbuffer(GLcontext *ctx, GLuint name) 1426{ 1427 struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); 1428 if (rb) { 1429 _mesa_init_renderbuffer(rb, name); 1430 } 1431 return rb; 1432} 1433 1434 1435/** 1436 * Delete a gl_framebuffer. 1437 * This is the default function for framebuffer->Delete(). 1438 */ 1439void 1440_mesa_delete_renderbuffer(struct gl_renderbuffer *rb) 1441{ 1442 if (rb->Data) { 1443 _mesa_free(rb->Data); 1444 } 1445 _mesa_free(rb); 1446} 1447 1448 1449/** 1450 * Allocate a software-based renderbuffer. This is called via the 1451 * ctx->Driver.NewRenderbuffer() function when the user creates a new 1452 * renderbuffer. 1453 * This would not be used for hardware-based renderbuffers. 1454 */ 1455struct gl_renderbuffer * 1456_mesa_new_soft_renderbuffer(GLcontext *ctx, GLuint name) 1457{ 1458 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name); 1459 if (rb) { 1460 rb->AllocStorage = soft_renderbuffer_storage; 1461 /* Normally, one would setup the PutRow, GetRow, etc functions here. 1462 * But we're doing that in the soft_renderbuffer_storage() function 1463 * instead. 1464 */ 1465 } 1466 return rb; 1467} 1468 1469 1470/** 1471 * Add software-based color renderbuffers to the given framebuffer. 1472 * This is a helper routine for device drivers when creating a 1473 * window system framebuffer (not a user-created render/framebuffer). 1474 * Once this function is called, you can basically forget about this 1475 * renderbuffer; core Mesa will handle all the buffer management and 1476 * rendering! 1477 */ 1478GLboolean 1479_mesa_add_color_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1480 GLuint rgbBits, GLuint alphaBits, 1481 GLboolean frontLeft, GLboolean backLeft, 1482 GLboolean frontRight, GLboolean backRight) 1483{ 1484 GLuint b; 1485 1486 if (rgbBits > 16 || alphaBits > 16) { 1487 _mesa_problem(ctx, 1488 "Unsupported bit depth in _mesa_add_color_renderbuffers"); 1489 return GL_FALSE; 1490 } 1491 1492 assert(MAX_COLOR_ATTACHMENTS >= 4); 1493 1494 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1495 struct gl_renderbuffer *rb; 1496 1497 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1498 continue; 1499 else if (b == BUFFER_BACK_LEFT && !backLeft) 1500 continue; 1501 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1502 continue; 1503 else if (b == BUFFER_BACK_RIGHT && !backRight) 1504 continue; 1505 1506 assert(fb->Attachment[b].Renderbuffer == NULL); 1507 1508 rb = _mesa_new_renderbuffer(ctx, 0); 1509 if (!rb) { 1510 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); 1511 return GL_FALSE; 1512 } 1513 1514 if (rgbBits <= 8) { 1515 if (alphaBits) 1516 rb->InternalFormat = GL_RGBA8; 1517 else 1518 rb->InternalFormat = GL_RGB8; 1519 } 1520 else { 1521 assert(rgbBits <= 16); 1522 if (alphaBits) 1523 rb->InternalFormat = GL_RGBA16; 1524 else 1525 rb->InternalFormat = GL_RGBA16; /* don't really have RGB16 yet */ 1526 } 1527 1528 rb->AllocStorage = soft_renderbuffer_storage; 1529 _mesa_add_renderbuffer(fb, b, rb); 1530 } 1531 1532 return GL_TRUE; 1533} 1534 1535 1536/** 1537 * Add software-based color index renderbuffers to the given framebuffer. 1538 * This is a helper routine for device drivers when creating a 1539 * window system framebuffer (not a user-created render/framebuffer). 1540 * Once this function is called, you can basically forget about this 1541 * renderbuffer; core Mesa will handle all the buffer management and 1542 * rendering! 1543 */ 1544GLboolean 1545_mesa_add_color_index_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1546 GLuint indexBits, 1547 GLboolean frontLeft, GLboolean backLeft, 1548 GLboolean frontRight, GLboolean backRight) 1549{ 1550 GLuint b; 1551 1552 if (indexBits > 8) { 1553 _mesa_problem(ctx, 1554 "Unsupported bit depth in _mesa_add_color_index_renderbuffers"); 1555 return GL_FALSE; 1556 } 1557 1558 assert(MAX_COLOR_ATTACHMENTS >= 4); 1559 1560 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1561 struct gl_renderbuffer *rb; 1562 1563 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1564 continue; 1565 else if (b == BUFFER_BACK_LEFT && !backLeft) 1566 continue; 1567 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1568 continue; 1569 else if (b == BUFFER_BACK_RIGHT && !backRight) 1570 continue; 1571 1572 assert(fb->Attachment[b].Renderbuffer == NULL); 1573 1574 rb = _mesa_new_renderbuffer(ctx, 0); 1575 if (!rb) { 1576 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); 1577 return GL_FALSE; 1578 } 1579 1580 if (indexBits <= 8) { 1581 /* only support GLuint for now */ 1582 /*rb->InternalFormat = GL_COLOR_INDEX8_EXT;*/ 1583 rb->InternalFormat = COLOR_INDEX32; 1584 } 1585 else { 1586 rb->InternalFormat = COLOR_INDEX32; 1587 } 1588 rb->AllocStorage = soft_renderbuffer_storage; 1589 _mesa_add_renderbuffer(fb, b, rb); 1590 } 1591 1592 return GL_TRUE; 1593} 1594 1595 1596/** 1597 * Add software-based alpha renderbuffers to the given framebuffer. 1598 * This is a helper routine for device drivers when creating a 1599 * window system framebuffer (not a user-created render/framebuffer). 1600 * Once this function is called, you can basically forget about this 1601 * renderbuffer; core Mesa will handle all the buffer management and 1602 * rendering! 1603 */ 1604GLboolean 1605_mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1606 GLuint alphaBits, 1607 GLboolean frontLeft, GLboolean backLeft, 1608 GLboolean frontRight, GLboolean backRight) 1609{ 1610 GLuint b; 1611 1612 /* for window system framebuffers only! */ 1613 assert(fb->Name == 0); 1614 1615 if (alphaBits > 8) { 1616 _mesa_problem(ctx, 1617 "Unsupported bit depth in _mesa_add_alpha_renderbuffers"); 1618 return GL_FALSE; 1619 } 1620 1621 assert(MAX_COLOR_ATTACHMENTS >= 4); 1622 1623 /* Wrap each of the RGB color buffers with an alpha renderbuffer. 1624 */ 1625 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1626 struct gl_renderbuffer *arb; 1627 1628 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1629 continue; 1630 else if (b == BUFFER_BACK_LEFT && !backLeft) 1631 continue; 1632 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1633 continue; 1634 else if (b == BUFFER_BACK_RIGHT && !backRight) 1635 continue; 1636 1637 /* the RGB buffer to wrap must already exist!! */ 1638 assert(fb->Attachment[b].Renderbuffer); 1639 1640 /* only GLubyte supported for now */ 1641 assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE); 1642 1643 /* allocate alpha renderbuffer */ 1644 arb = _mesa_new_renderbuffer(ctx, 0); 1645 if (!arb) { 1646 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer"); 1647 return GL_FALSE; 1648 } 1649 1650 /* wrap the alpha renderbuffer around the RGB renderbuffer */ 1651 arb->Wrapped = fb->Attachment[b].Renderbuffer; 1652 1653 /* Set up my alphabuffer fields and plug in my functions. 1654 * The functions will put/get the alpha values from/to RGBA arrays 1655 * and then call the wrapped buffer's functions to handle the RGB 1656 * values. 1657 */ 1658 arb->InternalFormat = arb->Wrapped->InternalFormat; 1659 arb->_BaseFormat = arb->Wrapped->_BaseFormat; 1660 arb->DataType = arb->Wrapped->DataType; 1661 arb->AllocStorage = alloc_storage_alpha8; 1662 arb->Delete = delete_renderbuffer_alpha8; 1663 arb->GetPointer = get_pointer_alpha8; 1664 arb->GetRow = get_row_alpha8; 1665 arb->GetValues = get_values_alpha8; 1666 arb->PutRow = put_row_alpha8; 1667 arb->PutRowRGB = put_row_rgb_alpha8; 1668 arb->PutMonoRow = put_mono_row_alpha8; 1669 arb->PutValues = put_values_alpha8; 1670 arb->PutMonoValues = put_mono_values_alpha8; 1671 1672 /* clear the pointer to avoid assertion/sanity check failure later */ 1673 fb->Attachment[b].Renderbuffer = NULL; 1674 1675 /* plug the alpha renderbuffer into the colorbuffer attachment */ 1676 _mesa_add_renderbuffer(fb, b, arb); 1677 } 1678 1679 return GL_TRUE; 1680} 1681 1682 1683/** 1684 * Add a software-based depth renderbuffer to the given framebuffer. 1685 * This is a helper routine for device drivers when creating a 1686 * window system framebuffer (not a user-created render/framebuffer). 1687 * Once this function is called, you can basically forget about this 1688 * renderbuffer; core Mesa will handle all the buffer management and 1689 * rendering! 1690 */ 1691GLboolean 1692_mesa_add_depth_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1693 GLuint depthBits) 1694{ 1695 struct gl_renderbuffer *rb; 1696 1697 if (depthBits > 32) { 1698 _mesa_problem(ctx, 1699 "Unsupported depthBits in _mesa_add_depth_renderbuffer"); 1700 return GL_FALSE; 1701 } 1702 1703 assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL); 1704 1705 rb = _mesa_new_renderbuffer(ctx, 0); 1706 if (!rb) { 1707 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer"); 1708 return GL_FALSE; 1709 } 1710 1711 if (depthBits <= 16) { 1712 rb->InternalFormat = GL_DEPTH_COMPONENT16; 1713 } 1714 else { 1715 rb->InternalFormat = GL_DEPTH_COMPONENT32; 1716 } 1717 rb->DepthBits = depthBits; 1718 1719 rb->AllocStorage = soft_renderbuffer_storage; 1720 _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); 1721 1722 return GL_TRUE; 1723} 1724 1725 1726/** 1727 * Add a software-based stencil renderbuffer to the given framebuffer. 1728 * This is a helper routine for device drivers when creating a 1729 * window system framebuffer (not a user-created render/framebuffer). 1730 * Once this function is called, you can basically forget about this 1731 * renderbuffer; core Mesa will handle all the buffer management and 1732 * rendering! 1733 */ 1734GLboolean 1735_mesa_add_stencil_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1736 GLuint stencilBits) 1737{ 1738 struct gl_renderbuffer *rb; 1739 1740 if (stencilBits > 16) { 1741 _mesa_problem(ctx, 1742 "Unsupported stencilBits in _mesa_add_stencil_renderbuffer"); 1743 return GL_FALSE; 1744 } 1745 1746 assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL); 1747 1748 rb = _mesa_new_renderbuffer(ctx, 0); 1749 if (!rb) { 1750 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer"); 1751 return GL_FALSE; 1752 } 1753 1754 if (stencilBits <= 8) { 1755 rb->InternalFormat = GL_STENCIL_INDEX8_EXT; 1756 } 1757 else { 1758 /* not really supported (see s_stencil.c code) */ 1759 rb->InternalFormat = GL_STENCIL_INDEX16_EXT; 1760 } 1761 1762 rb->AllocStorage = soft_renderbuffer_storage; 1763 _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); 1764 1765 return GL_TRUE; 1766} 1767 1768 1769/** 1770 * Add a software-based accumulation renderbuffer to the given framebuffer. 1771 * This is a helper routine for device drivers when creating a 1772 * window system framebuffer (not a user-created render/framebuffer). 1773 * Once this function is called, you can basically forget about this 1774 * renderbuffer; core Mesa will handle all the buffer management and 1775 * rendering! 1776 */ 1777GLboolean 1778_mesa_add_accum_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1779 GLuint redBits, GLuint greenBits, 1780 GLuint blueBits, GLuint alphaBits) 1781{ 1782 struct gl_renderbuffer *rb; 1783 1784 if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) { 1785 _mesa_problem(ctx, 1786 "Unsupported accumBits in _mesa_add_accum_renderbuffer"); 1787 return GL_FALSE; 1788 } 1789 1790 assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL); 1791 1792 rb = _mesa_new_renderbuffer(ctx, 0); 1793 if (!rb) { 1794 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1795 return GL_FALSE; 1796 } 1797 1798 rb->InternalFormat = GL_RGBA16; 1799 rb->AllocStorage = soft_renderbuffer_storage; 1800 _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); 1801 1802 return GL_TRUE; 1803} 1804 1805 1806 1807/** 1808 * Add a software-based accumulation renderbuffer to the given framebuffer. 1809 * This is a helper routine for device drivers when creating a 1810 * window system framebuffer (not a user-created render/framebuffer). 1811 * Once this function is called, you can basically forget about this 1812 * renderbuffer; core Mesa will handle all the buffer management and 1813 * rendering! 1814 * 1815 * NOTE: color-index aux buffers not supported. 1816 */ 1817GLboolean 1818_mesa_add_aux_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1819 GLuint colorBits, GLuint numBuffers) 1820{ 1821 GLuint i; 1822 1823 if (colorBits > 16) { 1824 _mesa_problem(ctx, 1825 "Unsupported accumBits in _mesa_add_aux_renderbuffers"); 1826 return GL_FALSE; 1827 } 1828 1829 assert(numBuffers < MAX_AUX_BUFFERS); 1830 1831 for (i = 0; i < numBuffers; i++) { 1832 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0); 1833 1834 assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL); 1835 1836 if (!rb) { 1837 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1838 return GL_FALSE; 1839 } 1840 1841 if (colorBits <= 8) { 1842 rb->InternalFormat = GL_RGBA8; 1843 } 1844 else { 1845 rb->InternalFormat = GL_RGBA16; 1846 } 1847 1848 rb->AllocStorage = soft_renderbuffer_storage; 1849 _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb); 1850 } 1851 return GL_TRUE; 1852} 1853 1854 1855/** 1856 * Create/attach software-based renderbuffers to the given framebuffer. 1857 * This is a helper routine for device drivers. Drivers can just as well 1858 * call the individual _mesa_add_*_renderbuffer() routines directly. 1859 */ 1860void 1861_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, 1862 GLboolean color, 1863 GLboolean depth, 1864 GLboolean stencil, 1865 GLboolean accum, 1866 GLboolean alpha, 1867 GLboolean aux) 1868{ 1869 GLboolean frontLeft = GL_TRUE; 1870 GLboolean backLeft = fb->Visual.doubleBufferMode; 1871 GLboolean frontRight = fb->Visual.stereoMode; 1872 GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; 1873 1874 if (color) { 1875 if (fb->Visual.rgbMode) { 1876 assert(fb->Visual.redBits == fb->Visual.greenBits); 1877 assert(fb->Visual.redBits == fb->Visual.blueBits); 1878 _mesa_add_color_renderbuffers(NULL, fb, 1879 fb->Visual.redBits, 1880 fb->Visual.alphaBits, 1881 frontLeft, backLeft, 1882 frontRight, backRight); 1883 } 1884 else { 1885 _mesa_add_color_index_renderbuffers(NULL, fb, 1886 fb->Visual.indexBits, 1887 frontLeft, backLeft, 1888 frontRight, backRight); 1889 } 1890 } 1891 1892 if (depth) { 1893 assert(fb->Visual.depthBits > 0); 1894 _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); 1895 } 1896 1897 if (stencil) { 1898 assert(fb->Visual.stencilBits > 0); 1899 _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); 1900 } 1901 1902 if (accum) { 1903 assert(fb->Visual.rgbMode); 1904 assert(fb->Visual.accumRedBits > 0); 1905 assert(fb->Visual.accumGreenBits > 0); 1906 assert(fb->Visual.accumBlueBits > 0); 1907 _mesa_add_accum_renderbuffer(NULL, fb, 1908 fb->Visual.accumRedBits, 1909 fb->Visual.accumGreenBits, 1910 fb->Visual.accumBlueBits, 1911 fb->Visual.accumAlphaBits); 1912 } 1913 1914 if (aux) { 1915 assert(fb->Visual.rgbMode); 1916 assert(fb->Visual.numAuxBuffers > 0); 1917 _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, 1918 fb->Visual.numAuxBuffers); 1919 } 1920 1921 if (alpha) { 1922 assert(fb->Visual.rgbMode); 1923 assert(fb->Visual.alphaBits > 0); 1924 _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, 1925 frontLeft, backLeft, 1926 frontRight, backRight); 1927 } 1928 1929#if 0 1930 if (multisample) { 1931 /* maybe someday */ 1932 } 1933#endif 1934} 1935 1936 1937/** 1938 * Attach a renderbuffer to a framebuffer. 1939 */ 1940void 1941_mesa_add_renderbuffer(struct gl_framebuffer *fb, 1942 GLuint bufferName, struct gl_renderbuffer *rb) 1943{ 1944 assert(fb); 1945 assert(rb); 1946#if 00 1947 /* there should be no previous renderbuffer on this attachment point! */ 1948 assert(fb->Attachment[bufferName].Renderbuffer == NULL); 1949#endif 1950 assert(bufferName < BUFFER_COUNT); 1951 1952 /* winsys vs. user-created buffer cross check */ 1953 if (fb->Name) { 1954 assert(rb->Name); 1955 } 1956 else { 1957 assert(!rb->Name); 1958 } 1959 1960 fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; 1961 fb->Attachment[bufferName].Complete = GL_TRUE; 1962 fb->Attachment[bufferName].Renderbuffer = rb; 1963} 1964