renderbuffer.c revision 7f07ac80ebaccaca82754ee7f0248e31a2312b44
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.5 4 * 5 * Copyright (C) 1999-2006 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 "fbobject.h" 47#include "formats.h" 48#include "mtypes.h" 49#include "fbobject.h" 50#include "renderbuffer.h" 51 52 53/* 32-bit color index format. Not a public format. */ 54#define COLOR_INDEX32 0x424243 55 56 57/* 58 * Routines for get/put values in common buffer formats follow. 59 * Someday add support for arbitrary row stride to make them more 60 * flexible. 61 */ 62 63/********************************************************************** 64 * Functions for buffers of 1 X GLubyte values. 65 * Typically stencil. 66 */ 67 68static void * 69get_pointer_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, 70 GLint x, GLint y) 71{ 72 if (!rb->Data) 73 return NULL; 74 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 75 /* Can't assert rb->Format since these funcs may be used for serveral 76 * different formats (GL_ALPHA8, GL_STENCIL_INDEX8, etc). 77 */ 78 return (GLubyte *) rb->Data + y * rb->Width + x; 79} 80 81 82static void 83get_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 84 GLint x, GLint y, void *values) 85{ 86 const GLubyte *src = (const GLubyte *) rb->Data + y * rb->Width + x; 87 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 88 memcpy(values, src, count * sizeof(GLubyte)); 89} 90 91 92static void 93get_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 94 const GLint x[], const GLint y[], void *values) 95{ 96 GLubyte *dst = (GLubyte *) values; 97 GLuint i; 98 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 99 for (i = 0; i < count; i++) { 100 const GLubyte *src = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 101 dst[i] = *src; 102 } 103} 104 105 106static void 107put_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 108 GLint x, GLint y, const void *values, const GLubyte *mask) 109{ 110 const GLubyte *src = (const GLubyte *) values; 111 GLubyte *dst = (GLubyte *) rb->Data + y * rb->Width + x; 112 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 113 if (mask) { 114 GLuint i; 115 for (i = 0; i < count; i++) { 116 if (mask[i]) { 117 dst[i] = src[i]; 118 } 119 } 120 } 121 else { 122 memcpy(dst, values, count * sizeof(GLubyte)); 123 } 124} 125 126 127static void 128put_mono_row_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 129 GLint x, GLint y, const void *value, const GLubyte *mask) 130{ 131 const GLubyte val = *((const GLubyte *) value); 132 GLubyte *dst = (GLubyte *) rb->Data + y * rb->Width + x; 133 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 134 if (mask) { 135 GLuint i; 136 for (i = 0; i < count; i++) { 137 if (mask[i]) { 138 dst[i] = val; 139 } 140 } 141 } 142 else { 143 GLuint i; 144 for (i = 0; i < count; i++) { 145 dst[i] = val; 146 } 147 } 148} 149 150 151static void 152put_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 153 const GLint x[], const GLint y[], 154 const void *values, const GLubyte *mask) 155{ 156 const GLubyte *src = (const GLubyte *) values; 157 GLuint i; 158 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 159 for (i = 0; i < count; i++) { 160 if (!mask || mask[i]) { 161 GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 162 *dst = src[i]; 163 } 164 } 165} 166 167 168static void 169put_mono_values_ubyte(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 170 const GLint x[], const GLint y[], 171 const void *value, const GLubyte *mask) 172{ 173 const GLubyte val = *((const GLubyte *) value); 174 GLuint i; 175 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 176 for (i = 0; i < count; i++) { 177 if (!mask || mask[i]) { 178 GLubyte *dst = (GLubyte *) rb->Data + y[i] * rb->Width + x[i]; 179 *dst = val; 180 } 181 } 182} 183 184 185/********************************************************************** 186 * Functions for buffers of 1 X GLushort values. 187 * Typically depth/Z. 188 */ 189 190static void * 191get_pointer_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, 192 GLint x, GLint y) 193{ 194 if (!rb->Data) 195 return NULL; 196 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 197 ASSERT(rb->Width > 0); 198 return (GLushort *) rb->Data + y * rb->Width + x; 199} 200 201 202static void 203get_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 204 GLint x, GLint y, void *values) 205{ 206 const void *src = rb->GetPointer(ctx, rb, x, y); 207 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 208 memcpy(values, src, count * sizeof(GLushort)); 209} 210 211 212static void 213get_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 214 const GLint x[], const GLint y[], void *values) 215{ 216 GLushort *dst = (GLushort *) values; 217 GLuint i; 218 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 219 for (i = 0; i < count; i++) { 220 const GLushort *src = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 221 dst[i] = *src; 222 } 223} 224 225 226static void 227put_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 228 GLint x, GLint y, const void *values, const GLubyte *mask) 229{ 230 const GLushort *src = (const GLushort *) values; 231 GLushort *dst = (GLushort *) rb->Data + y * rb->Width + x; 232 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 233 if (mask) { 234 GLuint i; 235 for (i = 0; i < count; i++) { 236 if (mask[i]) { 237 dst[i] = src[i]; 238 } 239 } 240 } 241 else { 242 memcpy(dst, src, count * sizeof(GLushort)); 243 } 244} 245 246 247static void 248put_mono_row_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 249 GLint x, GLint y, const void *value, const GLubyte *mask) 250{ 251 const GLushort val = *((const GLushort *) value); 252 GLushort *dst = (GLushort *) rb->Data + y * rb->Width + x; 253 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 254 if (mask) { 255 GLuint i; 256 for (i = 0; i < count; i++) { 257 if (mask[i]) { 258 dst[i] = val; 259 } 260 } 261 } 262 else { 263 GLuint i; 264 for (i = 0; i < count; i++) { 265 dst[i] = val; 266 } 267 } 268} 269 270 271static void 272put_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 273 const GLint x[], const GLint y[], const void *values, 274 const GLubyte *mask) 275{ 276 const GLushort *src = (const GLushort *) values; 277 GLuint i; 278 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 279 for (i = 0; i < count; i++) { 280 if (!mask || mask[i]) { 281 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 282 *dst = src[i]; 283 } 284 } 285} 286 287 288static void 289put_mono_values_ushort(GLcontext *ctx, struct gl_renderbuffer *rb, 290 GLuint count, const GLint x[], const GLint y[], 291 const void *value, const GLubyte *mask) 292{ 293 const GLushort val = *((const GLushort *) value); 294 ASSERT(rb->DataType == GL_UNSIGNED_SHORT); 295 if (mask) { 296 GLuint i; 297 for (i = 0; i < count; i++) { 298 if (mask[i]) { 299 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 300 *dst = val; 301 } 302 } 303 } 304 else { 305 GLuint i; 306 for (i = 0; i < count; i++) { 307 GLushort *dst = (GLushort *) rb->Data + y[i] * rb->Width + x[i]; 308 *dst = val; 309 } 310 } 311} 312 313 314/********************************************************************** 315 * Functions for buffers of 1 X GLuint values. 316 * Typically depth/Z or color index. 317 */ 318 319static void * 320get_pointer_uint(GLcontext *ctx, struct gl_renderbuffer *rb, 321 GLint x, GLint y) 322{ 323 if (!rb->Data) 324 return NULL; 325 ASSERT(rb->DataType == GL_UNSIGNED_INT || 326 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 327 return (GLuint *) rb->Data + y * rb->Width + x; 328} 329 330 331static void 332get_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 333 GLint x, GLint y, void *values) 334{ 335 const void *src = rb->GetPointer(ctx, rb, x, y); 336 ASSERT(rb->DataType == GL_UNSIGNED_INT || 337 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 338 memcpy(values, src, count * sizeof(GLuint)); 339} 340 341 342static void 343get_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 344 const GLint x[], const GLint y[], void *values) 345{ 346 GLuint *dst = (GLuint *) values; 347 GLuint i; 348 ASSERT(rb->DataType == GL_UNSIGNED_INT || 349 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 350 for (i = 0; i < count; i++) { 351 const GLuint *src = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 352 dst[i] = *src; 353 } 354} 355 356 357static void 358put_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 359 GLint x, GLint y, const void *values, const GLubyte *mask) 360{ 361 const GLuint *src = (const GLuint *) values; 362 GLuint *dst = (GLuint *) rb->Data + y * rb->Width + x; 363 ASSERT(rb->DataType == GL_UNSIGNED_INT || 364 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 365 if (mask) { 366 GLuint i; 367 for (i = 0; i < count; i++) { 368 if (mask[i]) { 369 dst[i] = src[i]; 370 } 371 } 372 } 373 else { 374 memcpy(dst, src, count * sizeof(GLuint)); 375 } 376} 377 378 379static void 380put_mono_row_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 381 GLint x, GLint y, const void *value, const GLubyte *mask) 382{ 383 const GLuint val = *((const GLuint *) value); 384 GLuint *dst = (GLuint *) rb->Data + y * rb->Width + x; 385 ASSERT(rb->DataType == GL_UNSIGNED_INT || 386 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 387 if (mask) { 388 GLuint i; 389 for (i = 0; i < count; i++) { 390 if (mask[i]) { 391 dst[i] = val; 392 } 393 } 394 } 395 else { 396 GLuint i; 397 for (i = 0; i < count; i++) { 398 dst[i] = val; 399 } 400 } 401} 402 403 404static void 405put_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 406 const GLint x[], const GLint y[], const void *values, 407 const GLubyte *mask) 408{ 409 const GLuint *src = (const GLuint *) values; 410 GLuint i; 411 ASSERT(rb->DataType == GL_UNSIGNED_INT || 412 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 413 for (i = 0; i < count; i++) { 414 if (!mask || mask[i]) { 415 GLuint *dst = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 416 *dst = src[i]; 417 } 418 } 419} 420 421 422static void 423put_mono_values_uint(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 424 const GLint x[], const GLint y[], const void *value, 425 const GLubyte *mask) 426{ 427 const GLuint val = *((const GLuint *) value); 428 GLuint i; 429 ASSERT(rb->DataType == GL_UNSIGNED_INT || 430 rb->DataType == GL_UNSIGNED_INT_24_8_EXT); 431 for (i = 0; i < count; i++) { 432 if (!mask || mask[i]) { 433 GLuint *dst = (GLuint *) rb->Data + y[i] * rb->Width + x[i]; 434 *dst = val; 435 } 436 } 437} 438 439 440/********************************************************************** 441 * Functions for buffers of 3 X GLubyte (or GLbyte) values. 442 * Typically color buffers. 443 * NOTE: the incoming and outgoing colors are RGBA! We ignore incoming 444 * alpha values and return 255 for outgoing alpha values. 445 */ 446 447static void * 448get_pointer_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, 449 GLint x, GLint y) 450{ 451 ASSERT(rb->Format == MESA_FORMAT_RGB888); 452 /* No direct access since this buffer is RGB but caller will be 453 * treating it as if it were RGBA. 454 */ 455 return NULL; 456} 457 458 459static void 460get_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 461 GLint x, GLint y, void *values) 462{ 463 const GLubyte *src = (const GLubyte *) rb->Data + 3 * (y * rb->Width + x); 464 GLubyte *dst = (GLubyte *) values; 465 GLuint i; 466 ASSERT(rb->Format == MESA_FORMAT_RGB888); 467 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 468 for (i = 0; i < count; i++) { 469 dst[i * 4 + 0] = src[i * 3 + 0]; 470 dst[i * 4 + 1] = src[i * 3 + 1]; 471 dst[i * 4 + 2] = src[i * 3 + 2]; 472 dst[i * 4 + 3] = 255; 473 } 474} 475 476 477static void 478get_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 479 const GLint x[], const GLint y[], void *values) 480{ 481 GLubyte *dst = (GLubyte *) values; 482 GLuint i; 483 ASSERT(rb->Format == MESA_FORMAT_RGB888); 484 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 485 for (i = 0; i < count; i++) { 486 const GLubyte *src 487 = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 488 dst[i * 4 + 0] = src[0]; 489 dst[i * 4 + 1] = src[1]; 490 dst[i * 4 + 2] = src[2]; 491 dst[i * 4 + 3] = 255; 492 } 493} 494 495 496static void 497put_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 498 GLint x, GLint y, const void *values, const GLubyte *mask) 499{ 500 /* note: incoming values are RGB+A! */ 501 const GLubyte *src = (const GLubyte *) values; 502 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 503 GLuint i; 504 ASSERT(rb->Format == MESA_FORMAT_RGB888); 505 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 506 for (i = 0; i < count; i++) { 507 if (!mask || mask[i]) { 508 dst[i * 3 + 0] = src[i * 4 + 0]; 509 dst[i * 3 + 1] = src[i * 4 + 1]; 510 dst[i * 3 + 2] = src[i * 4 + 2]; 511 } 512 } 513} 514 515 516static void 517put_row_rgb_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 518 GLint x, GLint y, const void *values, const GLubyte *mask) 519{ 520 /* note: incoming values are RGB+A! */ 521 const GLubyte *src = (const GLubyte *) values; 522 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 523 GLuint i; 524 ASSERT(rb->Format == MESA_FORMAT_RGB888); 525 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 526 for (i = 0; i < count; i++) { 527 if (!mask || mask[i]) { 528 dst[i * 3 + 0] = src[i * 3 + 0]; 529 dst[i * 3 + 1] = src[i * 3 + 1]; 530 dst[i * 3 + 2] = src[i * 3 + 2]; 531 } 532 } 533} 534 535 536static void 537put_mono_row_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 538 GLint x, GLint y, const void *value, const GLubyte *mask) 539{ 540 /* note: incoming value is RGB+A! */ 541 const GLubyte val0 = ((const GLubyte *) value)[0]; 542 const GLubyte val1 = ((const GLubyte *) value)[1]; 543 const GLubyte val2 = ((const GLubyte *) value)[2]; 544 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y * rb->Width + x); 545 ASSERT(rb->Format == MESA_FORMAT_RGB888); 546 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 547 if (!mask && val0 == val1 && val1 == val2) { 548 /* optimized case */ 549 memset(dst, val0, 3 * count); 550 } 551 else { 552 GLuint i; 553 for (i = 0; i < count; i++) { 554 if (!mask || mask[i]) { 555 dst[i * 3 + 0] = val0; 556 dst[i * 3 + 1] = val1; 557 dst[i * 3 + 2] = val2; 558 } 559 } 560 } 561} 562 563 564static void 565put_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 566 const GLint x[], const GLint y[], const void *values, 567 const GLubyte *mask) 568{ 569 /* note: incoming values are RGB+A! */ 570 const GLubyte *src = (const GLubyte *) values; 571 GLuint i; 572 ASSERT(rb->Format == MESA_FORMAT_RGB888); 573 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 574 for (i = 0; i < count; i++) { 575 if (!mask || mask[i]) { 576 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 577 dst[0] = src[i * 4 + 0]; 578 dst[1] = src[i * 4 + 1]; 579 dst[2] = src[i * 4 + 2]; 580 } 581 } 582} 583 584 585static void 586put_mono_values_ubyte3(GLcontext *ctx, struct gl_renderbuffer *rb, 587 GLuint count, const GLint x[], const GLint y[], 588 const void *value, const GLubyte *mask) 589{ 590 /* note: incoming value is RGB+A! */ 591 const GLubyte val0 = ((const GLubyte *) value)[0]; 592 const GLubyte val1 = ((const GLubyte *) value)[1]; 593 const GLubyte val2 = ((const GLubyte *) value)[2]; 594 GLuint i; 595 ASSERT(rb->Format == MESA_FORMAT_RGB888); 596 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 597 for (i = 0; i < count; i++) { 598 if (!mask || mask[i]) { 599 GLubyte *dst = (GLubyte *) rb->Data + 3 * (y[i] * rb->Width + x[i]); 600 dst[0] = val0; 601 dst[1] = val1; 602 dst[2] = val2; 603 } 604 } 605} 606 607 608/********************************************************************** 609 * Functions for buffers of 4 X GLubyte (or GLbyte) values. 610 * Typically color buffers. 611 */ 612 613static void * 614get_pointer_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, 615 GLint x, GLint y) 616{ 617 if (!rb->Data) 618 return NULL; 619 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 620 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 621 return (GLubyte *) rb->Data + 4 * (y * rb->Width + x); 622} 623 624 625static void 626get_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 627 GLint x, GLint y, void *values) 628{ 629 const GLubyte *src = (const GLubyte *) rb->Data + 4 * (y * rb->Width + x); 630 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 631 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 632 memcpy(values, src, 4 * count * sizeof(GLubyte)); 633} 634 635 636static void 637get_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 638 const GLint x[], const GLint y[], void *values) 639{ 640 /* treat 4*GLubyte as 1*GLuint */ 641 GLuint *dst = (GLuint *) values; 642 GLuint i; 643 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 644 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 645 for (i = 0; i < count; i++) { 646 const GLuint *src = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 647 dst[i] = *src; 648 } 649} 650 651 652static void 653put_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 654 GLint x, GLint y, const void *values, const GLubyte *mask) 655{ 656 /* treat 4*GLubyte as 1*GLuint */ 657 const GLuint *src = (const GLuint *) values; 658 GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x); 659 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 660 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 661 if (mask) { 662 GLuint i; 663 for (i = 0; i < count; i++) { 664 if (mask[i]) { 665 dst[i] = src[i]; 666 } 667 } 668 } 669 else { 670 memcpy(dst, src, 4 * count * sizeof(GLubyte)); 671 } 672} 673 674 675static void 676put_row_rgb_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 677 GLint x, GLint y, const void *values, const GLubyte *mask) 678{ 679 /* Store RGB values in RGBA buffer */ 680 const GLubyte *src = (const GLubyte *) values; 681 GLubyte *dst = (GLubyte *) rb->Data + 4 * (y * rb->Width + x); 682 GLuint i; 683 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 684 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 685 for (i = 0; i < count; i++) { 686 if (!mask || mask[i]) { 687 dst[i * 4 + 0] = src[i * 3 + 0]; 688 dst[i * 4 + 1] = src[i * 3 + 1]; 689 dst[i * 4 + 2] = src[i * 3 + 2]; 690 dst[i * 4 + 3] = 0xff; 691 } 692 } 693} 694 695 696static void 697put_mono_row_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 698 GLint x, GLint y, const void *value, const GLubyte *mask) 699{ 700 /* treat 4*GLubyte as 1*GLuint */ 701 const GLuint val = *((const GLuint *) value); 702 GLuint *dst = (GLuint *) rb->Data + (y * rb->Width + x); 703 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 704 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 705 if (!mask && val == 0) { 706 /* common case */ 707 memset(dst, 0, count * 4 * sizeof(GLubyte)); 708 } 709 else { 710 /* general case */ 711 if (mask) { 712 GLuint i; 713 for (i = 0; i < count; i++) { 714 if (mask[i]) { 715 dst[i] = val; 716 } 717 } 718 } 719 else { 720 GLuint i; 721 for (i = 0; i < count; i++) { 722 dst[i] = val; 723 } 724 } 725 } 726} 727 728 729static void 730put_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 731 const GLint x[], const GLint y[], const void *values, 732 const GLubyte *mask) 733{ 734 /* treat 4*GLubyte as 1*GLuint */ 735 const GLuint *src = (const GLuint *) values; 736 GLuint i; 737 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 738 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 739 for (i = 0; i < count; i++) { 740 if (!mask || mask[i]) { 741 GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 742 *dst = src[i]; 743 } 744 } 745} 746 747 748static void 749put_mono_values_ubyte4(GLcontext *ctx, struct gl_renderbuffer *rb, 750 GLuint count, const GLint x[], const GLint y[], 751 const void *value, const GLubyte *mask) 752{ 753 /* treat 4*GLubyte as 1*GLuint */ 754 const GLuint val = *((const GLuint *) value); 755 GLuint i; 756 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 757 ASSERT(rb->Format == MESA_FORMAT_RGBA8888); 758 for (i = 0; i < count; i++) { 759 if (!mask || mask[i]) { 760 GLuint *dst = (GLuint *) rb->Data + (y[i] * rb->Width + x[i]); 761 *dst = val; 762 } 763 } 764} 765 766 767/********************************************************************** 768 * Functions for buffers of 4 X GLushort (or GLshort) values. 769 * Typically accum buffer. 770 */ 771 772static void * 773get_pointer_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, 774 GLint x, GLint y) 775{ 776 if (!rb->Data) 777 return NULL; 778 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 779 return (GLushort *) rb->Data + 4 * (y * rb->Width + x); 780} 781 782 783static void 784get_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 785 GLint x, GLint y, void *values) 786{ 787 const GLshort *src = (const GLshort *) rb->Data + 4 * (y * rb->Width + x); 788 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 789 memcpy(values, src, 4 * count * sizeof(GLshort)); 790} 791 792 793static void 794get_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 795 const GLint x[], const GLint y[], void *values) 796{ 797 GLushort *dst = (GLushort *) values; 798 GLuint i; 799 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 800 for (i = 0; i < count; i++) { 801 const GLushort *src 802 = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 803 dst[i] = *src; 804 } 805} 806 807 808static void 809put_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 810 GLint x, GLint y, const void *values, const GLubyte *mask) 811{ 812 const GLushort *src = (const GLushort *) values; 813 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 814 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 815 if (mask) { 816 GLuint i; 817 for (i = 0; i < count; i++) { 818 if (mask[i]) { 819 dst[i * 4 + 0] = src[i * 4 + 0]; 820 dst[i * 4 + 1] = src[i * 4 + 1]; 821 dst[i * 4 + 2] = src[i * 4 + 2]; 822 dst[i * 4 + 3] = src[i * 4 + 3]; 823 } 824 } 825 } 826 else { 827 memcpy(dst, src, 4 * count * sizeof(GLushort)); 828 } 829} 830 831 832static void 833put_row_rgb_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 834 GLint x, GLint y, const void *values, const GLubyte *mask) 835{ 836 /* Put RGB values in RGBA buffer */ 837 const GLushort *src = (const GLushort *) values; 838 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 839 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 840 if (mask) { 841 GLuint i; 842 for (i = 0; i < count; i++) { 843 if (mask[i]) { 844 dst[i * 4 + 0] = src[i * 3 + 0]; 845 dst[i * 4 + 1] = src[i * 3 + 1]; 846 dst[i * 4 + 2] = src[i * 3 + 2]; 847 dst[i * 4 + 3] = 0xffff; 848 } 849 } 850 } 851 else { 852 memcpy(dst, src, 4 * count * sizeof(GLushort)); 853 } 854} 855 856 857static void 858put_mono_row_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 859 GLint x, GLint y, const void *value, const GLubyte *mask) 860{ 861 const GLushort val0 = ((const GLushort *) value)[0]; 862 const GLushort val1 = ((const GLushort *) value)[1]; 863 const GLushort val2 = ((const GLushort *) value)[2]; 864 const GLushort val3 = ((const GLushort *) value)[3]; 865 GLushort *dst = (GLushort *) rb->Data + 4 * (y * rb->Width + x); 866 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 867 if (!mask && val0 == 0 && val1 == 0 && val2 == 0 && val3 == 0) { 868 /* common case for clearing accum buffer */ 869 memset(dst, 0, count * 4 * sizeof(GLushort)); 870 } 871 else { 872 GLuint i; 873 for (i = 0; i < count; i++) { 874 if (!mask || mask[i]) { 875 dst[i * 4 + 0] = val0; 876 dst[i * 4 + 1] = val1; 877 dst[i * 4 + 2] = val2; 878 dst[i * 4 + 3] = val3; 879 } 880 } 881 } 882} 883 884 885static void 886put_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, GLuint count, 887 const GLint x[], const GLint y[], const void *values, 888 const GLubyte *mask) 889{ 890 const GLushort *src = (const GLushort *) values; 891 GLuint i; 892 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 893 for (i = 0; i < count; i++) { 894 if (!mask || mask[i]) { 895 GLushort *dst = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 896 dst[0] = src[i * 4 + 0]; 897 dst[1] = src[i * 4 + 1]; 898 dst[2] = src[i * 4 + 2]; 899 dst[3] = src[i * 4 + 3]; 900 } 901 } 902} 903 904 905static void 906put_mono_values_ushort4(GLcontext *ctx, struct gl_renderbuffer *rb, 907 GLuint count, const GLint x[], const GLint y[], 908 const void *value, const GLubyte *mask) 909{ 910 const GLushort val0 = ((const GLushort *) value)[0]; 911 const GLushort val1 = ((const GLushort *) value)[1]; 912 const GLushort val2 = ((const GLushort *) value)[2]; 913 const GLushort val3 = ((const GLushort *) value)[3]; 914 GLuint i; 915 ASSERT(rb->DataType == GL_UNSIGNED_SHORT || rb->DataType == GL_SHORT); 916 for (i = 0; i < count; i++) { 917 if (!mask || mask[i]) { 918 GLushort *dst = (GLushort *) rb->Data + 4 * (y[i] * rb->Width + x[i]); 919 dst[0] = val0; 920 dst[1] = val1; 921 dst[2] = val2; 922 dst[3] = val3; 923 } 924 } 925} 926 927 928 929/** 930 * This is a software fallback for the gl_renderbuffer->AllocStorage 931 * function. 932 * Device drivers will typically override this function for the buffers 933 * which it manages (typically color buffers, Z and stencil). 934 * Other buffers (like software accumulation and aux buffers) which the driver 935 * doesn't manage can be handled with this function. 936 * 937 * This one multi-purpose function can allocate stencil, depth, accum, color 938 * or color-index buffers! 939 * 940 * This function also plugs in the appropriate GetPointer, Get/PutRow and 941 * Get/PutValues functions. 942 */ 943GLboolean 944_mesa_soft_renderbuffer_storage(GLcontext *ctx, struct gl_renderbuffer *rb, 945 GLenum internalFormat, 946 GLuint width, GLuint height) 947{ 948 GLuint pixelSize; 949 950 switch (internalFormat) { 951 case GL_RGB: 952 case GL_R3_G3_B2: 953 case GL_RGB4: 954 case GL_RGB5: 955 case GL_RGB8: 956 case GL_RGB10: 957 case GL_RGB12: 958 case GL_RGB16: 959 rb->Format = MESA_FORMAT_RGB888; 960 rb->DataType = GL_UNSIGNED_BYTE; 961 rb->GetPointer = get_pointer_ubyte3; 962 rb->GetRow = get_row_ubyte3; 963 rb->GetValues = get_values_ubyte3; 964 rb->PutRow = put_row_ubyte3; 965 rb->PutRowRGB = put_row_rgb_ubyte3; 966 rb->PutMonoRow = put_mono_row_ubyte3; 967 rb->PutValues = put_values_ubyte3; 968 rb->PutMonoValues = put_mono_values_ubyte3; 969 pixelSize = 3 * sizeof(GLubyte); 970 break; 971 case GL_RGBA: 972 case GL_RGBA2: 973 case GL_RGBA4: 974 case GL_RGB5_A1: 975 case GL_RGBA8: 976#if 1 977 case GL_RGB10_A2: 978 case GL_RGBA12: 979#endif 980 rb->Format = MESA_FORMAT_RGBA8888; 981 rb->DataType = GL_UNSIGNED_BYTE; 982 rb->GetPointer = get_pointer_ubyte4; 983 rb->GetRow = get_row_ubyte4; 984 rb->GetValues = get_values_ubyte4; 985 rb->PutRow = put_row_ubyte4; 986 rb->PutRowRGB = put_row_rgb_ubyte4; 987 rb->PutMonoRow = put_mono_row_ubyte4; 988 rb->PutValues = put_values_ubyte4; 989 rb->PutMonoValues = put_mono_values_ubyte4; 990 pixelSize = 4 * sizeof(GLubyte); 991 break; 992 case GL_RGBA16: 993 /* for accum buffer */ 994 rb->Format = MESA_FORMAT_SIGNED_RGBA_16; 995 rb->DataType = GL_SHORT; 996 rb->GetPointer = get_pointer_ushort4; 997 rb->GetRow = get_row_ushort4; 998 rb->GetValues = get_values_ushort4; 999 rb->PutRow = put_row_ushort4; 1000 rb->PutRowRGB = put_row_rgb_ushort4; 1001 rb->PutMonoRow = put_mono_row_ushort4; 1002 rb->PutValues = put_values_ushort4; 1003 rb->PutMonoValues = put_mono_values_ushort4; 1004 pixelSize = 4 * sizeof(GLushort); 1005 break; 1006#if 0 1007 case GL_ALPHA8: 1008 rb->Format = MESA_FORMAT_A8; 1009 rb->DataType = GL_UNSIGNED_BYTE; 1010 rb->GetPointer = get_pointer_alpha8; 1011 rb->GetRow = get_row_alpha8; 1012 rb->GetValues = get_values_alpha8; 1013 rb->PutRow = put_row_alpha8; 1014 rb->PutRowRGB = NULL; 1015 rb->PutMonoRow = put_mono_row_alpha8; 1016 rb->PutValues = put_values_alpha8; 1017 rb->PutMonoValues = put_mono_values_alpha8; 1018 pixelSize = sizeof(GLubyte); 1019 break; 1020#endif 1021 case GL_STENCIL_INDEX: 1022 case GL_STENCIL_INDEX1_EXT: 1023 case GL_STENCIL_INDEX4_EXT: 1024 case GL_STENCIL_INDEX8_EXT: 1025 case GL_STENCIL_INDEX16_EXT: 1026 rb->Format = MESA_FORMAT_S8; 1027 rb->DataType = GL_UNSIGNED_BYTE; 1028 rb->GetPointer = get_pointer_ubyte; 1029 rb->GetRow = get_row_ubyte; 1030 rb->GetValues = get_values_ubyte; 1031 rb->PutRow = put_row_ubyte; 1032 rb->PutRowRGB = NULL; 1033 rb->PutMonoRow = put_mono_row_ubyte; 1034 rb->PutValues = put_values_ubyte; 1035 rb->PutMonoValues = put_mono_values_ubyte; 1036 pixelSize = sizeof(GLubyte); 1037 break; 1038 case GL_DEPTH_COMPONENT: 1039 case GL_DEPTH_COMPONENT16: 1040 rb->Format = MESA_FORMAT_Z16; 1041 rb->DataType = GL_UNSIGNED_SHORT; 1042 rb->GetPointer = get_pointer_ushort; 1043 rb->GetRow = get_row_ushort; 1044 rb->GetValues = get_values_ushort; 1045 rb->PutRow = put_row_ushort; 1046 rb->PutRowRGB = NULL; 1047 rb->PutMonoRow = put_mono_row_ushort; 1048 rb->PutValues = put_values_ushort; 1049 rb->PutMonoValues = put_mono_values_ushort; 1050 pixelSize = sizeof(GLushort); 1051 break; 1052 case GL_DEPTH_COMPONENT24: 1053 rb->DataType = GL_UNSIGNED_INT; 1054 rb->GetPointer = get_pointer_uint; 1055 rb->GetRow = get_row_uint; 1056 rb->GetValues = get_values_uint; 1057 rb->PutRow = put_row_uint; 1058 rb->PutRowRGB = NULL; 1059 rb->PutMonoRow = put_mono_row_uint; 1060 rb->PutValues = put_values_uint; 1061 rb->PutMonoValues = put_mono_values_uint; 1062 rb->Format = MESA_FORMAT_X8_Z24; 1063 pixelSize = sizeof(GLuint); 1064 break; 1065 case GL_DEPTH_COMPONENT32: 1066 rb->DataType = GL_UNSIGNED_INT; 1067 rb->GetPointer = get_pointer_uint; 1068 rb->GetRow = get_row_uint; 1069 rb->GetValues = get_values_uint; 1070 rb->PutRow = put_row_uint; 1071 rb->PutRowRGB = NULL; 1072 rb->PutMonoRow = put_mono_row_uint; 1073 rb->PutValues = put_values_uint; 1074 rb->PutMonoValues = put_mono_values_uint; 1075 rb->Format = MESA_FORMAT_Z32; 1076 pixelSize = sizeof(GLuint); 1077 break; 1078 case GL_DEPTH_STENCIL_EXT: 1079 case GL_DEPTH24_STENCIL8_EXT: 1080 rb->Format = MESA_FORMAT_Z24_S8; 1081 rb->DataType = GL_UNSIGNED_INT_24_8_EXT; 1082 rb->GetPointer = get_pointer_uint; 1083 rb->GetRow = get_row_uint; 1084 rb->GetValues = get_values_uint; 1085 rb->PutRow = put_row_uint; 1086 rb->PutRowRGB = NULL; 1087 rb->PutMonoRow = put_mono_row_uint; 1088 rb->PutValues = put_values_uint; 1089 rb->PutMonoValues = put_mono_values_uint; 1090 pixelSize = sizeof(GLuint); 1091 break; 1092 case GL_COLOR_INDEX8_EXT: 1093 case GL_COLOR_INDEX16_EXT: 1094 case COLOR_INDEX32: 1095 rb->Format = MESA_FORMAT_CI8; 1096 rb->DataType = GL_UNSIGNED_BYTE; 1097 rb->GetPointer = get_pointer_ubyte; 1098 rb->GetRow = get_row_ubyte; 1099 rb->GetValues = get_values_ubyte; 1100 rb->PutRow = put_row_ubyte; 1101 rb->PutRowRGB = NULL; 1102 rb->PutMonoRow = put_mono_row_ubyte; 1103 rb->PutValues = put_values_ubyte; 1104 rb->PutMonoValues = put_mono_values_ubyte; 1105 pixelSize = sizeof(GLubyte); 1106 break; 1107 default: 1108 _mesa_problem(ctx, "Bad internalFormat in _mesa_soft_renderbuffer_storage"); 1109 return GL_FALSE; 1110 } 1111 1112 ASSERT(rb->DataType); 1113 ASSERT(rb->GetPointer); 1114 ASSERT(rb->GetRow); 1115 ASSERT(rb->GetValues); 1116 ASSERT(rb->PutRow); 1117 ASSERT(rb->PutMonoRow); 1118 ASSERT(rb->PutValues); 1119 ASSERT(rb->PutMonoValues); 1120 1121 /* free old buffer storage */ 1122 if (rb->Data) { 1123 free(rb->Data); 1124 rb->Data = NULL; 1125 } 1126 1127 if (width > 0 && height > 0) { 1128 /* allocate new buffer storage */ 1129 rb->Data = malloc(width * height * pixelSize); 1130 1131 if (rb->Data == NULL) { 1132 rb->Width = 0; 1133 rb->Height = 0; 1134 _mesa_error(ctx, GL_OUT_OF_MEMORY, 1135 "software renderbuffer allocation (%d x %d x %d)", 1136 width, height, pixelSize); 1137 return GL_FALSE; 1138 } 1139 } 1140 1141 rb->Width = width; 1142 rb->Height = height; 1143 rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); 1144 ASSERT(rb->_BaseFormat); 1145 1146 return GL_TRUE; 1147} 1148 1149 1150 1151/**********************************************************************/ 1152/**********************************************************************/ 1153/**********************************************************************/ 1154 1155 1156/** 1157 * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha 1158 * buffer wrapper around an existing RGB renderbuffer (hw or sw). 1159 * 1160 * When PutRow is called (for example), we store the alpha values in 1161 * this buffer, then pass on the PutRow call to the wrapped RGB 1162 * buffer. 1163 */ 1164 1165 1166static GLboolean 1167alloc_storage_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1168 GLenum internalFormat, GLuint width, GLuint height) 1169{ 1170 ASSERT(arb != arb->Wrapped); 1171 ASSERT(arb->Format == MESA_FORMAT_A8); 1172 1173 /* first, pass the call to the wrapped RGB buffer */ 1174 if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat, 1175 width, height)) { 1176 return GL_FALSE; 1177 } 1178 1179 /* next, resize my alpha buffer */ 1180 if (arb->Data) { 1181 free(arb->Data); 1182 } 1183 1184 arb->Data = malloc(width * height * sizeof(GLubyte)); 1185 if (arb->Data == NULL) { 1186 arb->Width = 0; 1187 arb->Height = 0; 1188 _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation"); 1189 return GL_FALSE; 1190 } 1191 1192 arb->Width = width; 1193 arb->Height = height; 1194 1195 return GL_TRUE; 1196} 1197 1198 1199/** 1200 * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer. 1201 */ 1202static void 1203delete_renderbuffer_alpha8(struct gl_renderbuffer *arb) 1204{ 1205 if (arb->Data) { 1206 free(arb->Data); 1207 } 1208 ASSERT(arb->Wrapped); 1209 ASSERT(arb != arb->Wrapped); 1210 arb->Wrapped->Delete(arb->Wrapped); 1211 arb->Wrapped = NULL; 1212 free(arb); 1213} 1214 1215 1216static void * 1217get_pointer_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1218 GLint x, GLint y) 1219{ 1220 return NULL; /* don't allow direct access! */ 1221} 1222 1223 1224static void 1225get_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1226 GLint x, GLint y, void *values) 1227{ 1228 /* NOTE: 'values' is RGBA format! */ 1229 const GLubyte *src = (const GLubyte *) arb->Data + y * arb->Width + x; 1230 GLubyte *dst = (GLubyte *) values; 1231 GLuint i; 1232 ASSERT(arb != arb->Wrapped); 1233 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1234 /* first, pass the call to the wrapped RGB buffer */ 1235 arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values); 1236 /* second, fill in alpha values from this buffer! */ 1237 for (i = 0; i < count; i++) { 1238 dst[i * 4 + 3] = src[i]; 1239 } 1240} 1241 1242 1243static void 1244get_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1245 const GLint x[], const GLint y[], void *values) 1246{ 1247 GLubyte *dst = (GLubyte *) values; 1248 GLuint i; 1249 ASSERT(arb != arb->Wrapped); 1250 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1251 /* first, pass the call to the wrapped RGB buffer */ 1252 arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values); 1253 /* second, fill in alpha values from this buffer! */ 1254 for (i = 0; i < count; i++) { 1255 const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1256 dst[i * 4 + 3] = *src; 1257 } 1258} 1259 1260 1261static void 1262put_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1263 GLint x, GLint y, const void *values, const GLubyte *mask) 1264{ 1265 const GLubyte *src = (const GLubyte *) values; 1266 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1267 GLuint i; 1268 ASSERT(arb != arb->Wrapped); 1269 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1270 /* first, pass the call to the wrapped RGB buffer */ 1271 arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask); 1272 /* second, store alpha in our buffer */ 1273 for (i = 0; i < count; i++) { 1274 if (!mask || mask[i]) { 1275 dst[i] = src[i * 4 + 3]; 1276 } 1277 } 1278} 1279 1280 1281static void 1282put_row_rgb_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1283 GLint x, GLint y, const void *values, const GLubyte *mask) 1284{ 1285 const GLubyte *src = (const GLubyte *) values; 1286 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1287 GLuint i; 1288 ASSERT(arb != arb->Wrapped); 1289 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1290 /* first, pass the call to the wrapped RGB buffer */ 1291 arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask); 1292 /* second, store alpha in our buffer */ 1293 for (i = 0; i < count; i++) { 1294 if (!mask || mask[i]) { 1295 dst[i] = src[i * 4 + 3]; 1296 } 1297 } 1298} 1299 1300 1301static void 1302put_mono_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1303 GLint x, GLint y, const void *value, const GLubyte *mask) 1304{ 1305 const GLubyte val = ((const GLubyte *) value)[3]; 1306 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1307 ASSERT(arb != arb->Wrapped); 1308 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1309 /* first, pass the call to the wrapped RGB buffer */ 1310 arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask); 1311 /* second, store alpha in our buffer */ 1312 if (mask) { 1313 GLuint i; 1314 for (i = 0; i < count; i++) { 1315 if (mask[i]) { 1316 dst[i] = val; 1317 } 1318 } 1319 } 1320 else { 1321 memset(dst, val, count); 1322 } 1323} 1324 1325 1326static void 1327put_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1328 const GLint x[], const GLint y[], 1329 const void *values, const GLubyte *mask) 1330{ 1331 const GLubyte *src = (const GLubyte *) values; 1332 GLuint i; 1333 ASSERT(arb != arb->Wrapped); 1334 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1335 /* first, pass the call to the wrapped RGB buffer */ 1336 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask); 1337 /* second, store alpha in our buffer */ 1338 for (i = 0; i < count; i++) { 1339 if (!mask || mask[i]) { 1340 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1341 *dst = src[i * 4 + 3]; 1342 } 1343 } 1344} 1345 1346 1347static void 1348put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1349 GLuint count, const GLint x[], const GLint y[], 1350 const void *value, const GLubyte *mask) 1351{ 1352 const GLubyte val = ((const GLubyte *) value)[3]; 1353 GLuint i; 1354 ASSERT(arb != arb->Wrapped); 1355 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1356 /* first, pass the call to the wrapped RGB buffer */ 1357 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask); 1358 /* second, store alpha in our buffer */ 1359 for (i = 0; i < count; i++) { 1360 if (!mask || mask[i]) { 1361 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1362 *dst = val; 1363 } 1364 } 1365} 1366 1367 1368static void 1369copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) 1370{ 1371 ASSERT(dst->Format == MESA_FORMAT_A8); 1372 ASSERT(src->Format == MESA_FORMAT_A8); 1373 ASSERT(dst->Width == src->Width); 1374 ASSERT(dst->Height == src->Height); 1375 1376 memcpy(dst->Data, src->Data, dst->Width * dst->Height * sizeof(GLubyte)); 1377} 1378 1379 1380/**********************************************************************/ 1381/**********************************************************************/ 1382/**********************************************************************/ 1383 1384 1385/** 1386 * Default GetPointer routine. Always return NULL to indicate that 1387 * direct buffer access is not supported. 1388 */ 1389static void * 1390nop_get_pointer(GLcontext *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) 1391{ 1392 return NULL; 1393} 1394 1395 1396/** 1397 * Initialize the fields of a gl_renderbuffer to default values. 1398 */ 1399void 1400_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) 1401{ 1402 _glthread_INIT_MUTEX(rb->Mutex); 1403 1404 rb->Magic = RB_MAGIC; 1405 rb->ClassID = 0; 1406 rb->Name = name; 1407 rb->RefCount = 0; 1408 rb->Delete = _mesa_delete_renderbuffer; 1409 1410 /* The rest of these should be set later by the caller of this function or 1411 * the AllocStorage method: 1412 */ 1413 rb->AllocStorage = NULL; 1414 1415 rb->Width = 0; 1416 rb->Height = 0; 1417 rb->InternalFormat = GL_NONE; 1418 rb->Format = MESA_FORMAT_NONE; 1419 1420 rb->DataType = GL_NONE; 1421 rb->Data = NULL; 1422 1423 /* Point back to ourself so that we don't have to check for Wrapped==NULL 1424 * all over the drivers. 1425 */ 1426 rb->Wrapped = rb; 1427 1428 rb->GetPointer = nop_get_pointer; 1429 rb->GetRow = NULL; 1430 rb->GetValues = NULL; 1431 rb->PutRow = NULL; 1432 rb->PutRowRGB = NULL; 1433 rb->PutMonoRow = NULL; 1434 rb->PutValues = NULL; 1435 rb->PutMonoValues = NULL; 1436} 1437 1438 1439/** 1440 * Allocate a new gl_renderbuffer object. This can be used for user-created 1441 * renderbuffers or window-system renderbuffers. 1442 */ 1443struct gl_renderbuffer * 1444_mesa_new_renderbuffer(GLcontext *ctx, GLuint name) 1445{ 1446 struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); 1447 if (rb) { 1448 _mesa_init_renderbuffer(rb, name); 1449 } 1450 return rb; 1451} 1452 1453 1454/** 1455 * Delete a gl_framebuffer. 1456 * This is the default function for renderbuffer->Delete(). 1457 */ 1458void 1459_mesa_delete_renderbuffer(struct gl_renderbuffer *rb) 1460{ 1461 if (rb->Data) { 1462 free(rb->Data); 1463 } 1464 free(rb); 1465} 1466 1467 1468/** 1469 * Allocate a software-based renderbuffer. This is called via the 1470 * ctx->Driver.NewRenderbuffer() function when the user creates a new 1471 * renderbuffer. 1472 * This would not be used for hardware-based renderbuffers. 1473 */ 1474struct gl_renderbuffer * 1475_mesa_new_soft_renderbuffer(GLcontext *ctx, GLuint name) 1476{ 1477 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name); 1478 if (rb) { 1479 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1480 /* Normally, one would setup the PutRow, GetRow, etc functions here. 1481 * But we're doing that in the _mesa_soft_renderbuffer_storage() function 1482 * instead. 1483 */ 1484 } 1485 return rb; 1486} 1487 1488 1489/** 1490 * Add software-based color renderbuffers to the given framebuffer. 1491 * This is a helper routine for device drivers when creating a 1492 * window system framebuffer (not a user-created render/framebuffer). 1493 * Once this function is called, you can basically forget about this 1494 * renderbuffer; core Mesa will handle all the buffer management and 1495 * rendering! 1496 */ 1497GLboolean 1498_mesa_add_color_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1499 GLuint rgbBits, GLuint alphaBits, 1500 GLboolean frontLeft, GLboolean backLeft, 1501 GLboolean frontRight, GLboolean backRight) 1502{ 1503 GLuint b; 1504 1505 if (rgbBits > 16 || alphaBits > 16) { 1506 _mesa_problem(ctx, 1507 "Unsupported bit depth in _mesa_add_color_renderbuffers"); 1508 return GL_FALSE; 1509 } 1510 1511 assert(MAX_COLOR_ATTACHMENTS >= 4); 1512 1513 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1514 struct gl_renderbuffer *rb; 1515 1516 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1517 continue; 1518 else if (b == BUFFER_BACK_LEFT && !backLeft) 1519 continue; 1520 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1521 continue; 1522 else if (b == BUFFER_BACK_RIGHT && !backRight) 1523 continue; 1524 1525 assert(fb->Attachment[b].Renderbuffer == NULL); 1526 1527 rb = _mesa_new_renderbuffer(ctx, 0); 1528 if (!rb) { 1529 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); 1530 return GL_FALSE; 1531 } 1532 1533 if (rgbBits <= 8) { 1534 if (alphaBits) 1535 rb->Format = MESA_FORMAT_RGBA8888; 1536 else 1537 rb->Format = MESA_FORMAT_RGB888; 1538 } 1539 else { 1540 assert(rgbBits <= 16); 1541 rb->Format = MESA_FORMAT_NONE; /*XXX RGBA16;*/ 1542 } 1543 rb->InternalFormat = GL_RGBA; 1544 1545 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1546 _mesa_add_renderbuffer(fb, b, rb); 1547 } 1548 1549 return GL_TRUE; 1550} 1551 1552 1553/** 1554 * Add software-based alpha renderbuffers to the given framebuffer. 1555 * This is a helper routine for device drivers when creating a 1556 * window system framebuffer (not a user-created render/framebuffer). 1557 * Once this function is called, you can basically forget about this 1558 * renderbuffer; core Mesa will handle all the buffer management and 1559 * rendering! 1560 */ 1561GLboolean 1562_mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1563 GLuint alphaBits, 1564 GLboolean frontLeft, GLboolean backLeft, 1565 GLboolean frontRight, GLboolean backRight) 1566{ 1567 GLuint b; 1568 1569 /* for window system framebuffers only! */ 1570 assert(fb->Name == 0); 1571 1572 if (alphaBits > 8) { 1573 _mesa_problem(ctx, 1574 "Unsupported bit depth in _mesa_add_alpha_renderbuffers"); 1575 return GL_FALSE; 1576 } 1577 1578 assert(MAX_COLOR_ATTACHMENTS >= 4); 1579 1580 /* Wrap each of the RGB color buffers with an alpha renderbuffer. 1581 */ 1582 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1583 struct gl_renderbuffer *arb; 1584 1585 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1586 continue; 1587 else if (b == BUFFER_BACK_LEFT && !backLeft) 1588 continue; 1589 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1590 continue; 1591 else if (b == BUFFER_BACK_RIGHT && !backRight) 1592 continue; 1593 1594 /* the RGB buffer to wrap must already exist!! */ 1595 assert(fb->Attachment[b].Renderbuffer); 1596 1597 /* only GLubyte supported for now */ 1598 assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE); 1599 1600 /* allocate alpha renderbuffer */ 1601 arb = _mesa_new_renderbuffer(ctx, 0); 1602 if (!arb) { 1603 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer"); 1604 return GL_FALSE; 1605 } 1606 1607 /* wrap the alpha renderbuffer around the RGB renderbuffer */ 1608 arb->Wrapped = fb->Attachment[b].Renderbuffer; 1609 1610 /* Set up my alphabuffer fields and plug in my functions. 1611 * The functions will put/get the alpha values from/to RGBA arrays 1612 * and then call the wrapped buffer's functions to handle the RGB 1613 * values. 1614 */ 1615 arb->InternalFormat = arb->Wrapped->InternalFormat; 1616 arb->Format = MESA_FORMAT_A8; 1617 arb->DataType = arb->Wrapped->DataType; 1618 arb->AllocStorage = alloc_storage_alpha8; 1619 arb->Delete = delete_renderbuffer_alpha8; 1620 arb->GetPointer = get_pointer_alpha8; 1621 arb->GetRow = get_row_alpha8; 1622 arb->GetValues = get_values_alpha8; 1623 arb->PutRow = put_row_alpha8; 1624 arb->PutRowRGB = put_row_rgb_alpha8; 1625 arb->PutMonoRow = put_mono_row_alpha8; 1626 arb->PutValues = put_values_alpha8; 1627 arb->PutMonoValues = put_mono_values_alpha8; 1628 1629 /* clear the pointer to avoid assertion/sanity check failure later */ 1630 fb->Attachment[b].Renderbuffer = NULL; 1631 1632 /* plug the alpha renderbuffer into the colorbuffer attachment */ 1633 _mesa_add_renderbuffer(fb, b, arb); 1634 } 1635 1636 return GL_TRUE; 1637} 1638 1639 1640/** 1641 * For framebuffers that use a software alpha channel wrapper 1642 * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, 1643 * copy the back buffer alpha channel into the front buffer alpha channel. 1644 */ 1645void 1646_mesa_copy_soft_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb) 1647{ 1648 if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && 1649 fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) 1650 copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, 1651 fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); 1652 1653 1654 if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && 1655 fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) 1656 copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, 1657 fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); 1658} 1659 1660 1661/** 1662 * Add a software-based depth renderbuffer to the given framebuffer. 1663 * This is a helper routine for device drivers when creating a 1664 * window system framebuffer (not a user-created render/framebuffer). 1665 * Once this function is called, you can basically forget about this 1666 * renderbuffer; core Mesa will handle all the buffer management and 1667 * rendering! 1668 */ 1669GLboolean 1670_mesa_add_depth_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1671 GLuint depthBits) 1672{ 1673 struct gl_renderbuffer *rb; 1674 1675 if (depthBits > 32) { 1676 _mesa_problem(ctx, 1677 "Unsupported depthBits in _mesa_add_depth_renderbuffer"); 1678 return GL_FALSE; 1679 } 1680 1681 assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL); 1682 1683 rb = _mesa_new_renderbuffer(ctx, 0); 1684 if (!rb) { 1685 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer"); 1686 return GL_FALSE; 1687 } 1688 1689 if (depthBits <= 16) { 1690 rb->Format = MESA_FORMAT_Z16; 1691 rb->InternalFormat = GL_DEPTH_COMPONENT16; 1692 } 1693 else if (depthBits <= 24) { 1694 rb->Format = MESA_FORMAT_X8_Z24; 1695 rb->InternalFormat = GL_DEPTH_COMPONENT24; 1696 } 1697 else { 1698 rb->Format = MESA_FORMAT_Z32; 1699 rb->InternalFormat = GL_DEPTH_COMPONENT32; 1700 } 1701 1702 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1703 _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); 1704 1705 return GL_TRUE; 1706} 1707 1708 1709/** 1710 * Add a software-based stencil renderbuffer to the given framebuffer. 1711 * This is a helper routine for device drivers when creating a 1712 * window system framebuffer (not a user-created render/framebuffer). 1713 * Once this function is called, you can basically forget about this 1714 * renderbuffer; core Mesa will handle all the buffer management and 1715 * rendering! 1716 */ 1717GLboolean 1718_mesa_add_stencil_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1719 GLuint stencilBits) 1720{ 1721 struct gl_renderbuffer *rb; 1722 1723 if (stencilBits > 16) { 1724 _mesa_problem(ctx, 1725 "Unsupported stencilBits in _mesa_add_stencil_renderbuffer"); 1726 return GL_FALSE; 1727 } 1728 1729 assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL); 1730 1731 rb = _mesa_new_renderbuffer(ctx, 0); 1732 if (!rb) { 1733 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer"); 1734 return GL_FALSE; 1735 } 1736 1737 assert(stencilBits <= 8); 1738 rb->Format = MESA_FORMAT_S8; 1739 rb->InternalFormat = GL_STENCIL_INDEX8; 1740 1741 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1742 _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); 1743 1744 return GL_TRUE; 1745} 1746 1747 1748/** 1749 * Add a software-based accumulation renderbuffer to the given framebuffer. 1750 * This is a helper routine for device drivers when creating a 1751 * window system framebuffer (not a user-created render/framebuffer). 1752 * Once this function is called, you can basically forget about this 1753 * renderbuffer; core Mesa will handle all the buffer management and 1754 * rendering! 1755 */ 1756GLboolean 1757_mesa_add_accum_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1758 GLuint redBits, GLuint greenBits, 1759 GLuint blueBits, GLuint alphaBits) 1760{ 1761 struct gl_renderbuffer *rb; 1762 1763 if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) { 1764 _mesa_problem(ctx, 1765 "Unsupported accumBits in _mesa_add_accum_renderbuffer"); 1766 return GL_FALSE; 1767 } 1768 1769 assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL); 1770 1771 rb = _mesa_new_renderbuffer(ctx, 0); 1772 if (!rb) { 1773 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1774 return GL_FALSE; 1775 } 1776 1777 rb->Format = MESA_FORMAT_SIGNED_RGBA_16; 1778 rb->InternalFormat = GL_RGBA16; 1779 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1780 _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); 1781 1782 return GL_TRUE; 1783} 1784 1785 1786 1787/** 1788 * Add a software-based accumulation renderbuffer to the given framebuffer. 1789 * This is a helper routine for device drivers when creating a 1790 * window system framebuffer (not a user-created render/framebuffer). 1791 * Once this function is called, you can basically forget about this 1792 * renderbuffer; core Mesa will handle all the buffer management and 1793 * rendering! 1794 * 1795 * NOTE: color-index aux buffers not supported. 1796 */ 1797GLboolean 1798_mesa_add_aux_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1799 GLuint colorBits, GLuint numBuffers) 1800{ 1801 GLuint i; 1802 1803 if (colorBits > 16) { 1804 _mesa_problem(ctx, 1805 "Unsupported accumBits in _mesa_add_aux_renderbuffers"); 1806 return GL_FALSE; 1807 } 1808 1809 assert(numBuffers <= MAX_AUX_BUFFERS); 1810 1811 for (i = 0; i < numBuffers; i++) { 1812 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0); 1813 1814 assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL); 1815 1816 if (!rb) { 1817 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1818 return GL_FALSE; 1819 } 1820 1821 assert (colorBits <= 8); 1822 rb->Format = MESA_FORMAT_RGBA8888; 1823 rb->InternalFormat = GL_RGBA; 1824 1825 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1826 _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb); 1827 } 1828 return GL_TRUE; 1829} 1830 1831 1832/** 1833 * Create/attach software-based renderbuffers to the given framebuffer. 1834 * This is a helper routine for device drivers. Drivers can just as well 1835 * call the individual _mesa_add_*_renderbuffer() routines directly. 1836 */ 1837void 1838_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, 1839 GLboolean color, 1840 GLboolean depth, 1841 GLboolean stencil, 1842 GLboolean accum, 1843 GLboolean alpha, 1844 GLboolean aux) 1845{ 1846 GLboolean frontLeft = GL_TRUE; 1847 GLboolean backLeft = fb->Visual.doubleBufferMode; 1848 GLboolean frontRight = fb->Visual.stereoMode; 1849 GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; 1850 1851 if (color) { 1852 assert(fb->Visual.redBits == fb->Visual.greenBits); 1853 assert(fb->Visual.redBits == fb->Visual.blueBits); 1854 _mesa_add_color_renderbuffers(NULL, fb, 1855 fb->Visual.redBits, 1856 fb->Visual.alphaBits, 1857 frontLeft, backLeft, 1858 frontRight, backRight); 1859 } 1860 1861 if (depth) { 1862 assert(fb->Visual.depthBits > 0); 1863 _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); 1864 } 1865 1866 if (stencil) { 1867 assert(fb->Visual.stencilBits > 0); 1868 _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); 1869 } 1870 1871 if (accum) { 1872 assert(fb->Visual.accumRedBits > 0); 1873 assert(fb->Visual.accumGreenBits > 0); 1874 assert(fb->Visual.accumBlueBits > 0); 1875 _mesa_add_accum_renderbuffer(NULL, fb, 1876 fb->Visual.accumRedBits, 1877 fb->Visual.accumGreenBits, 1878 fb->Visual.accumBlueBits, 1879 fb->Visual.accumAlphaBits); 1880 } 1881 1882 if (aux) { 1883 assert(fb->Visual.numAuxBuffers > 0); 1884 _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, 1885 fb->Visual.numAuxBuffers); 1886 } 1887 1888 if (alpha) { 1889 assert(fb->Visual.alphaBits > 0); 1890 _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, 1891 frontLeft, backLeft, 1892 frontRight, backRight); 1893 } 1894 1895#if 0 1896 if (multisample) { 1897 /* maybe someday */ 1898 } 1899#endif 1900} 1901 1902 1903/** 1904 * Attach a renderbuffer to a framebuffer. 1905 */ 1906void 1907_mesa_add_renderbuffer(struct gl_framebuffer *fb, 1908 GLuint bufferName, struct gl_renderbuffer *rb) 1909{ 1910 assert(fb); 1911 assert(rb); 1912 assert(bufferName < BUFFER_COUNT); 1913 1914 /* There should be no previous renderbuffer on this attachment point, 1915 * with the exception of depth/stencil since the same renderbuffer may 1916 * be used for both. 1917 */ 1918 assert(bufferName == BUFFER_DEPTH || 1919 bufferName == BUFFER_STENCIL || 1920 fb->Attachment[bufferName].Renderbuffer == NULL); 1921 1922 /* winsys vs. user-created buffer cross check */ 1923 if (fb->Name) { 1924 assert(rb->Name); 1925 } 1926 else { 1927 assert(!rb->Name); 1928 } 1929 1930 fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; 1931 fb->Attachment[bufferName].Complete = GL_TRUE; 1932 _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); 1933} 1934 1935 1936/** 1937 * Remove the named renderbuffer from the given framebuffer. 1938 */ 1939void 1940_mesa_remove_renderbuffer(struct gl_framebuffer *fb, GLuint bufferName) 1941{ 1942 struct gl_renderbuffer *rb; 1943 1944 assert(bufferName < BUFFER_COUNT); 1945 1946 rb = fb->Attachment[bufferName].Renderbuffer; 1947 if (!rb) 1948 return; 1949 1950 _mesa_reference_renderbuffer(&rb, NULL); 1951 1952 fb->Attachment[bufferName].Renderbuffer = NULL; 1953} 1954 1955 1956/** 1957 * Set *ptr to point to rb. If *ptr points to another renderbuffer, 1958 * dereference that buffer first. The new renderbuffer's refcount will 1959 * be incremented. The old renderbuffer's refcount will be decremented. 1960 */ 1961void 1962_mesa_reference_renderbuffer(struct gl_renderbuffer **ptr, 1963 struct gl_renderbuffer *rb) 1964{ 1965 assert(ptr); 1966 if (*ptr == rb) { 1967 /* no change */ 1968 return; 1969 } 1970 1971 if (*ptr) { 1972 /* Unreference the old renderbuffer */ 1973 GLboolean deleteFlag = GL_FALSE; 1974 struct gl_renderbuffer *oldRb = *ptr; 1975 1976 assert(oldRb->Magic == RB_MAGIC); 1977 _glthread_LOCK_MUTEX(oldRb->Mutex); 1978 assert(oldRb->Magic == RB_MAGIC); 1979 ASSERT(oldRb->RefCount > 0); 1980 oldRb->RefCount--; 1981 /*printf("RB DECR %p (%d) to %d\n", (void*) oldRb, oldRb->Name, oldRb->RefCount);*/ 1982 deleteFlag = (oldRb->RefCount == 0); 1983 _glthread_UNLOCK_MUTEX(oldRb->Mutex); 1984 1985 if (deleteFlag) { 1986 oldRb->Magic = 0; /* now invalid memory! */ 1987 oldRb->Delete(oldRb); 1988 } 1989 1990 *ptr = NULL; 1991 } 1992 assert(!*ptr); 1993 1994 if (rb) { 1995 assert(rb->Magic == RB_MAGIC); 1996 /* reference new renderbuffer */ 1997 _glthread_LOCK_MUTEX(rb->Mutex); 1998 rb->RefCount++; 1999 /*printf("RB INCR %p (%d) to %d\n", (void*) rb, rb->Name, rb->RefCount);*/ 2000 _glthread_UNLOCK_MUTEX(rb->Mutex); 2001 *ptr = rb; 2002 } 2003} 2004 2005 2006/** 2007 * Create a new combined depth/stencil renderbuffer for implementing 2008 * the GL_EXT_packed_depth_stencil extension. 2009 * \return new depth/stencil renderbuffer 2010 */ 2011struct gl_renderbuffer * 2012_mesa_new_depthstencil_renderbuffer(GLcontext *ctx, GLuint name) 2013{ 2014 struct gl_renderbuffer *dsrb; 2015 2016 dsrb = _mesa_new_renderbuffer(ctx, name); 2017 if (!dsrb) 2018 return NULL; 2019 2020 /* init fields not covered by _mesa_new_renderbuffer() */ 2021 dsrb->InternalFormat = GL_DEPTH24_STENCIL8_EXT; 2022 dsrb->Format = MESA_FORMAT_Z24_S8; 2023 dsrb->AllocStorage = _mesa_soft_renderbuffer_storage; 2024 2025 return dsrb; 2026} 2027