renderbuffer.c revision 42aaa548a1020be5d40b3dce9448d8004b1ef947
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 "mtypes.h" 47#include "fbobject.h" 48#include "renderbuffer.h" 49 50#include "rbadaptors.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 _ActualFormat 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 _mesa_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 _mesa_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 _mesa_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 _mesa_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 _mesa_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 _mesa_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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 546 ASSERT(rb->DataType == GL_UNSIGNED_BYTE); 547 if (!mask && val0 == val1 && val1 == val2) { 548 /* optimized case */ 549 _mesa_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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGB8); 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->_ActualFormat == GL_RGBA8); 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->_ActualFormat == GL_RGBA8); 632 _mesa_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->_ActualFormat == GL_RGBA8); 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->_ActualFormat == GL_RGBA8); 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 _mesa_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->_ActualFormat == GL_RGBA8); 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->_ActualFormat == GL_RGBA8); 705 if (!mask && val == 0) { 706 /* common case */ 707 _mesa_bzero(dst, 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->_ActualFormat == GL_RGBA8); 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->_ActualFormat == GL_RGBA8); 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 _mesa_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 _mesa_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 _mesa_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 _mesa_bzero(dst, 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 /* first clear these fields */ 951 rb->RedBits = 952 rb->GreenBits = 953 rb->BlueBits = 954 rb->AlphaBits = 955 rb->IndexBits = 956 rb->DepthBits = 957 rb->StencilBits = 0; 958 959 switch (internalFormat) { 960 case GL_RGB: 961 case GL_R3_G3_B2: 962 case GL_RGB4: 963 case GL_RGB5: 964 case GL_RGB8: 965 case GL_RGB10: 966 case GL_RGB12: 967 case GL_RGB16: 968 rb->_ActualFormat = GL_RGB8; 969 rb->_BaseFormat = GL_RGB; 970 rb->DataType = GL_UNSIGNED_BYTE; 971 rb->GetPointer = get_pointer_ubyte3; 972 rb->GetRow = get_row_ubyte3; 973 rb->GetValues = get_values_ubyte3; 974 rb->PutRow = put_row_ubyte3; 975 rb->PutRowRGB = put_row_rgb_ubyte3; 976 rb->PutMonoRow = put_mono_row_ubyte3; 977 rb->PutValues = put_values_ubyte3; 978 rb->PutMonoValues = put_mono_values_ubyte3; 979 rb->RedBits = 8 * sizeof(GLubyte); 980 rb->GreenBits = 8 * sizeof(GLubyte); 981 rb->BlueBits = 8 * sizeof(GLubyte); 982 rb->AlphaBits = 0; 983 pixelSize = 3 * sizeof(GLubyte); 984 break; 985 case GL_RGBA: 986 case GL_RGBA2: 987 case GL_RGBA4: 988 case GL_RGB5_A1: 989 case GL_RGBA8: 990 rb->_ActualFormat = GL_RGBA8; 991 rb->_BaseFormat = GL_RGBA; 992 rb->DataType = GL_UNSIGNED_BYTE; 993 rb->GetPointer = get_pointer_ubyte4; 994 rb->GetRow = get_row_ubyte4; 995 rb->GetValues = get_values_ubyte4; 996 rb->PutRow = put_row_ubyte4; 997 rb->PutRowRGB = put_row_rgb_ubyte4; 998 rb->PutMonoRow = put_mono_row_ubyte4; 999 rb->PutValues = put_values_ubyte4; 1000 rb->PutMonoValues = put_mono_values_ubyte4; 1001 rb->RedBits = 8 * sizeof(GLubyte); 1002 rb->GreenBits = 8 * sizeof(GLubyte); 1003 rb->BlueBits = 8 * sizeof(GLubyte); 1004 rb->AlphaBits = 8 * sizeof(GLubyte); 1005 pixelSize = 4 * sizeof(GLubyte); 1006 break; 1007 case GL_RGB10_A2: 1008 case GL_RGBA12: 1009 case GL_RGBA16: 1010 rb->_ActualFormat = GL_RGBA16; 1011 rb->_BaseFormat = GL_RGBA; 1012 rb->DataType = GL_UNSIGNED_SHORT; 1013 rb->GetPointer = get_pointer_ushort4; 1014 rb->GetRow = get_row_ushort4; 1015 rb->GetValues = get_values_ushort4; 1016 rb->PutRow = put_row_ushort4; 1017 rb->PutRowRGB = put_row_rgb_ushort4; 1018 rb->PutMonoRow = put_mono_row_ushort4; 1019 rb->PutValues = put_values_ushort4; 1020 rb->PutMonoValues = put_mono_values_ushort4; 1021 rb->RedBits = 8 * sizeof(GLushort); 1022 rb->GreenBits = 8 * sizeof(GLushort); 1023 rb->BlueBits = 8 * sizeof(GLushort); 1024 rb->AlphaBits = 8 * sizeof(GLushort); 1025 pixelSize = 4 * sizeof(GLushort); 1026 break; 1027#if 00 1028 case GL_ALPHA8: 1029 rb->_ActualFormat = GL_ALPHA8; 1030 rb->_BaseFormat = GL_RGBA; /* Yes, not GL_ALPHA! */ 1031 rb->DataType = GL_UNSIGNED_BYTE; 1032 rb->GetPointer = get_pointer_alpha8; 1033 rb->GetRow = get_row_alpha8; 1034 rb->GetValues = get_values_alpha8; 1035 rb->PutRow = put_row_alpha8; 1036 rb->PutRowRGB = NULL; 1037 rb->PutMonoRow = put_mono_row_alpha8; 1038 rb->PutValues = put_values_alpha8; 1039 rb->PutMonoValues = put_mono_values_alpha8; 1040 rb->RedBits = 0; /*red*/ 1041 rb->GreenBits = 0; /*green*/ 1042 rb->BlueBits = 0; /*blue*/ 1043 rb->AlphaBits = 8 * sizeof(GLubyte); 1044 pixelSize = sizeof(GLubyte); 1045 break; 1046#endif 1047 case GL_STENCIL_INDEX: 1048 case GL_STENCIL_INDEX1_EXT: 1049 case GL_STENCIL_INDEX4_EXT: 1050 case GL_STENCIL_INDEX8_EXT: 1051 rb->_ActualFormat = GL_STENCIL_INDEX8_EXT; 1052 rb->_BaseFormat = GL_STENCIL_INDEX; 1053 rb->DataType = GL_UNSIGNED_BYTE; 1054 rb->GetPointer = get_pointer_ubyte; 1055 rb->GetRow = get_row_ubyte; 1056 rb->GetValues = get_values_ubyte; 1057 rb->PutRow = put_row_ubyte; 1058 rb->PutRowRGB = NULL; 1059 rb->PutMonoRow = put_mono_row_ubyte; 1060 rb->PutValues = put_values_ubyte; 1061 rb->PutMonoValues = put_mono_values_ubyte; 1062 rb->StencilBits = 8 * sizeof(GLubyte); 1063 pixelSize = sizeof(GLubyte); 1064 break; 1065 case GL_STENCIL_INDEX16_EXT: 1066 rb->_ActualFormat = GL_STENCIL_INDEX16_EXT; 1067 rb->_BaseFormat = GL_STENCIL_INDEX; 1068 rb->DataType = GL_UNSIGNED_SHORT; 1069 rb->GetPointer = get_pointer_ushort; 1070 rb->GetRow = get_row_ushort; 1071 rb->GetValues = get_values_ushort; 1072 rb->PutRow = put_row_ushort; 1073 rb->PutRowRGB = NULL; 1074 rb->PutMonoRow = put_mono_row_ushort; 1075 rb->PutValues = put_values_ushort; 1076 rb->PutMonoValues = put_mono_values_ushort; 1077 rb->StencilBits = 8 * sizeof(GLushort); 1078 pixelSize = sizeof(GLushort); 1079 break; 1080 case GL_DEPTH_COMPONENT: 1081 case GL_DEPTH_COMPONENT16: 1082 rb->_ActualFormat = GL_DEPTH_COMPONENT16; 1083 rb->_BaseFormat = GL_DEPTH_COMPONENT; 1084 rb->DataType = GL_UNSIGNED_SHORT; 1085 rb->GetPointer = get_pointer_ushort; 1086 rb->GetRow = get_row_ushort; 1087 rb->GetValues = get_values_ushort; 1088 rb->PutRow = put_row_ushort; 1089 rb->PutRowRGB = NULL; 1090 rb->PutMonoRow = put_mono_row_ushort; 1091 rb->PutValues = put_values_ushort; 1092 rb->PutMonoValues = put_mono_values_ushort; 1093 rb->DepthBits = 8 * sizeof(GLushort); 1094 pixelSize = sizeof(GLushort); 1095 break; 1096 case GL_DEPTH_COMPONENT24: 1097 case GL_DEPTH_COMPONENT32: 1098 rb->_BaseFormat = GL_DEPTH_COMPONENT; 1099 rb->DataType = GL_UNSIGNED_INT; 1100 rb->GetPointer = get_pointer_uint; 1101 rb->GetRow = get_row_uint; 1102 rb->GetValues = get_values_uint; 1103 rb->PutRow = put_row_uint; 1104 rb->PutRowRGB = NULL; 1105 rb->PutMonoRow = put_mono_row_uint; 1106 rb->PutValues = put_values_uint; 1107 rb->PutMonoValues = put_mono_values_uint; 1108 if (internalFormat == GL_DEPTH_COMPONENT24) { 1109 rb->_ActualFormat = GL_DEPTH_COMPONENT24; 1110 rb->DepthBits = 24; 1111 } 1112 else { 1113 rb->_ActualFormat = GL_DEPTH_COMPONENT32; 1114 rb->DepthBits = 32; 1115 } 1116 pixelSize = sizeof(GLuint); 1117 break; 1118 case GL_DEPTH_STENCIL_EXT: 1119 case GL_DEPTH24_STENCIL8_EXT: 1120 rb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT; 1121 rb->_BaseFormat = GL_DEPTH_STENCIL_EXT; 1122 rb->DataType = GL_UNSIGNED_INT_24_8_EXT; 1123 rb->GetPointer = get_pointer_uint; 1124 rb->GetRow = get_row_uint; 1125 rb->GetValues = get_values_uint; 1126 rb->PutRow = put_row_uint; 1127 rb->PutRowRGB = NULL; 1128 rb->PutMonoRow = put_mono_row_uint; 1129 rb->PutValues = put_values_uint; 1130 rb->PutMonoValues = put_mono_values_uint; 1131 rb->DepthBits = 24; 1132 rb->StencilBits = 8; 1133 pixelSize = sizeof(GLuint); 1134 break; 1135 case GL_COLOR_INDEX8_EXT: 1136 rb->_ActualFormat = GL_COLOR_INDEX8_EXT; 1137 rb->_BaseFormat = GL_COLOR_INDEX; 1138 rb->DataType = GL_UNSIGNED_BYTE; 1139 rb->GetPointer = get_pointer_ubyte; 1140 rb->GetRow = get_row_ubyte; 1141 rb->GetValues = get_values_ubyte; 1142 rb->PutRow = put_row_ubyte; 1143 rb->PutRowRGB = NULL; 1144 rb->PutMonoRow = put_mono_row_ubyte; 1145 rb->PutValues = put_values_ubyte; 1146 rb->PutMonoValues = put_mono_values_ubyte; 1147 rb->IndexBits = 8 * sizeof(GLubyte); 1148 pixelSize = sizeof(GLubyte); 1149 break; 1150 case GL_COLOR_INDEX16_EXT: 1151 rb->_ActualFormat = GL_COLOR_INDEX16_EXT; 1152 rb->_BaseFormat = GL_COLOR_INDEX; 1153 rb->DataType = GL_UNSIGNED_SHORT; 1154 rb->GetPointer = get_pointer_ushort; 1155 rb->GetRow = get_row_ushort; 1156 rb->GetValues = get_values_ushort; 1157 rb->PutRow = put_row_ushort; 1158 rb->PutRowRGB = NULL; 1159 rb->PutMonoRow = put_mono_row_ushort; 1160 rb->PutValues = put_values_ushort; 1161 rb->PutMonoValues = put_mono_values_ushort; 1162 rb->IndexBits = 8 * sizeof(GLushort); 1163 pixelSize = sizeof(GLushort); 1164 break; 1165 case COLOR_INDEX32: 1166 rb->_ActualFormat = COLOR_INDEX32; 1167 rb->_BaseFormat = GL_COLOR_INDEX; 1168 rb->DataType = GL_UNSIGNED_INT; 1169 rb->GetPointer = get_pointer_uint; 1170 rb->GetRow = get_row_uint; 1171 rb->GetValues = get_values_uint; 1172 rb->PutRow = put_row_uint; 1173 rb->PutRowRGB = NULL; 1174 rb->PutMonoRow = put_mono_row_uint; 1175 rb->PutValues = put_values_uint; 1176 rb->PutMonoValues = put_mono_values_uint; 1177 rb->IndexBits = 8 * sizeof(GLuint); 1178 pixelSize = sizeof(GLuint); 1179 break; 1180 default: 1181 _mesa_problem(ctx, "Bad internalFormat in _mesa_soft_renderbuffer_storage"); 1182 return GL_FALSE; 1183 } 1184 1185 ASSERT(rb->DataType); 1186 ASSERT(rb->GetPointer); 1187 ASSERT(rb->GetRow); 1188 ASSERT(rb->GetValues); 1189 ASSERT(rb->PutRow); 1190 ASSERT(rb->PutMonoRow); 1191 ASSERT(rb->PutValues); 1192 ASSERT(rb->PutMonoValues); 1193 1194 /* free old buffer storage */ 1195 if (rb->Data) { 1196 _mesa_free(rb->Data); 1197 rb->Data = NULL; 1198 } 1199 1200 if (width > 0 && height > 0) { 1201 /* allocate new buffer storage */ 1202 rb->Data = _mesa_malloc(width * height * pixelSize); 1203 if (rb->Data == NULL) { 1204 rb->Width = 0; 1205 rb->Height = 0; 1206 _mesa_error(ctx, GL_OUT_OF_MEMORY, 1207 "software renderbuffer allocation (%d x %d x %d)", 1208 width, height, pixelSize); 1209 return GL_FALSE; 1210 } 1211 } 1212 1213 rb->Width = width; 1214 rb->Height = height; 1215 1216 return GL_TRUE; 1217} 1218 1219 1220 1221/**********************************************************************/ 1222/**********************************************************************/ 1223/**********************************************************************/ 1224 1225 1226/** 1227 * Here we utilize the gl_renderbuffer->Wrapper field to put an alpha 1228 * buffer wrapper around an existing RGB renderbuffer (hw or sw). 1229 * 1230 * When PutRow is called (for example), we store the alpha values in 1231 * this buffer, then pass on the PutRow call to the wrapped RGB 1232 * buffer. 1233 */ 1234 1235 1236static GLboolean 1237alloc_storage_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1238 GLenum internalFormat, GLuint width, GLuint height) 1239{ 1240 ASSERT(arb != arb->Wrapped); 1241 ASSERT(arb->_ActualFormat == GL_ALPHA8); 1242 1243 /* first, pass the call to the wrapped RGB buffer */ 1244 if (!arb->Wrapped->AllocStorage(ctx, arb->Wrapped, internalFormat, 1245 width, height)) { 1246 return GL_FALSE; 1247 } 1248 1249 /* next, resize my alpha buffer */ 1250 if (arb->Data) { 1251 _mesa_free(arb->Data); 1252 } 1253 1254 arb->Data = _mesa_malloc(width * height * sizeof(GLubyte)); 1255 if (arb->Data == NULL) { 1256 arb->Width = 0; 1257 arb->Height = 0; 1258 _mesa_error(ctx, GL_OUT_OF_MEMORY, "software alpha buffer allocation"); 1259 return GL_FALSE; 1260 } 1261 1262 arb->Width = width; 1263 arb->Height = height; 1264 1265 return GL_TRUE; 1266} 1267 1268 1269/** 1270 * Delete an alpha_renderbuffer object, as well as the wrapped RGB buffer. 1271 */ 1272static void 1273delete_renderbuffer_alpha8(struct gl_renderbuffer *arb) 1274{ 1275 if (arb->Data) { 1276 _mesa_free(arb->Data); 1277 } 1278 ASSERT(arb->Wrapped); 1279 ASSERT(arb != arb->Wrapped); 1280 arb->Wrapped->Delete(arb->Wrapped); 1281 arb->Wrapped = NULL; 1282 _mesa_free(arb); 1283} 1284 1285 1286static void * 1287get_pointer_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1288 GLint x, GLint y) 1289{ 1290 return NULL; /* don't allow direct access! */ 1291} 1292 1293 1294static void 1295get_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1296 GLint x, GLint y, void *values) 1297{ 1298 /* NOTE: 'values' is RGBA format! */ 1299 const GLubyte *src = (const GLubyte *) arb->Data + y * arb->Width + x; 1300 GLubyte *dst = (GLubyte *) values; 1301 GLuint i; 1302 ASSERT(arb != arb->Wrapped); 1303 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1304 /* first, pass the call to the wrapped RGB buffer */ 1305 arb->Wrapped->GetRow(ctx, arb->Wrapped, count, x, y, values); 1306 /* second, fill in alpha values from this buffer! */ 1307 for (i = 0; i < count; i++) { 1308 dst[i * 4 + 3] = src[i]; 1309 } 1310} 1311 1312 1313static void 1314get_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1315 const GLint x[], const GLint y[], void *values) 1316{ 1317 GLubyte *dst = (GLubyte *) values; 1318 GLuint i; 1319 ASSERT(arb != arb->Wrapped); 1320 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1321 /* first, pass the call to the wrapped RGB buffer */ 1322 arb->Wrapped->GetValues(ctx, arb->Wrapped, count, x, y, values); 1323 /* second, fill in alpha values from this buffer! */ 1324 for (i = 0; i < count; i++) { 1325 const GLubyte *src = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1326 dst[i * 4 + 3] = *src; 1327 } 1328} 1329 1330 1331static void 1332put_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1333 GLint x, GLint y, const void *values, const GLubyte *mask) 1334{ 1335 const GLubyte *src = (const GLubyte *) values; 1336 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1337 GLuint i; 1338 ASSERT(arb != arb->Wrapped); 1339 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1340 /* first, pass the call to the wrapped RGB buffer */ 1341 arb->Wrapped->PutRow(ctx, arb->Wrapped, count, x, y, values, mask); 1342 /* second, store alpha in our buffer */ 1343 for (i = 0; i < count; i++) { 1344 if (!mask || mask[i]) { 1345 dst[i] = src[i * 4 + 3]; 1346 } 1347 } 1348} 1349 1350 1351static void 1352put_row_rgb_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1353 GLint x, GLint y, const void *values, const GLubyte *mask) 1354{ 1355 const GLubyte *src = (const GLubyte *) values; 1356 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1357 GLuint i; 1358 ASSERT(arb != arb->Wrapped); 1359 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1360 /* first, pass the call to the wrapped RGB buffer */ 1361 arb->Wrapped->PutRowRGB(ctx, arb->Wrapped, count, x, y, values, mask); 1362 /* second, store alpha in our buffer */ 1363 for (i = 0; i < count; i++) { 1364 if (!mask || mask[i]) { 1365 dst[i] = src[i * 4 + 3]; 1366 } 1367 } 1368} 1369 1370 1371static void 1372put_mono_row_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1373 GLint x, GLint y, const void *value, const GLubyte *mask) 1374{ 1375 const GLubyte val = ((const GLubyte *) value)[3]; 1376 GLubyte *dst = (GLubyte *) arb->Data + y * arb->Width + x; 1377 ASSERT(arb != arb->Wrapped); 1378 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1379 /* first, pass the call to the wrapped RGB buffer */ 1380 arb->Wrapped->PutMonoRow(ctx, arb->Wrapped, count, x, y, value, mask); 1381 /* second, store alpha in our buffer */ 1382 if (mask) { 1383 GLuint i; 1384 for (i = 0; i < count; i++) { 1385 if (mask[i]) { 1386 dst[i] = val; 1387 } 1388 } 1389 } 1390 else { 1391 _mesa_memset(dst, val, count); 1392 } 1393} 1394 1395 1396static void 1397put_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, GLuint count, 1398 const GLint x[], const GLint y[], 1399 const void *values, const GLubyte *mask) 1400{ 1401 const GLubyte *src = (const GLubyte *) values; 1402 GLuint i; 1403 ASSERT(arb != arb->Wrapped); 1404 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1405 /* first, pass the call to the wrapped RGB buffer */ 1406 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, values, mask); 1407 /* second, store alpha in our buffer */ 1408 for (i = 0; i < count; i++) { 1409 if (!mask || mask[i]) { 1410 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1411 *dst = src[i * 4 + 3]; 1412 } 1413 } 1414} 1415 1416 1417static void 1418put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, 1419 GLuint count, const GLint x[], const GLint y[], 1420 const void *value, const GLubyte *mask) 1421{ 1422 const GLubyte val = ((const GLubyte *) value)[3]; 1423 GLuint i; 1424 ASSERT(arb != arb->Wrapped); 1425 ASSERT(arb->DataType == GL_UNSIGNED_BYTE); 1426 /* first, pass the call to the wrapped RGB buffer */ 1427 arb->Wrapped->PutValues(ctx, arb->Wrapped, count, x, y, value, mask); 1428 /* second, store alpha in our buffer */ 1429 for (i = 0; i < count; i++) { 1430 if (!mask || mask[i]) { 1431 GLubyte *dst = (GLubyte *) arb->Data + y[i] * arb->Width + x[i]; 1432 *dst = val; 1433 } 1434 } 1435} 1436 1437 1438static void 1439copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) 1440{ 1441 ASSERT(dst->_ActualFormat == GL_ALPHA8); 1442 ASSERT(src->_ActualFormat == GL_ALPHA8); 1443 ASSERT(dst->Width == src->Width); 1444 ASSERT(dst->Height == src->Height); 1445 1446 _mesa_memcpy(dst->Data, src->Data, dst->Width * dst->Height * sizeof(GLubyte)); 1447} 1448 1449 1450/**********************************************************************/ 1451/**********************************************************************/ 1452/**********************************************************************/ 1453 1454 1455/** 1456 * Default GetPointer routine. Always return NULL to indicate that 1457 * direct buffer access is not supported. 1458 */ 1459static void * 1460nop_get_pointer(GLcontext *ctx, struct gl_renderbuffer *rb, GLint x, GLint y) 1461{ 1462 return NULL; 1463} 1464 1465 1466/** 1467 * Initialize the fields of a gl_renderbuffer to default values. 1468 */ 1469void 1470_mesa_init_renderbuffer(struct gl_renderbuffer *rb, GLuint name) 1471{ 1472 _glthread_INIT_MUTEX(rb->Mutex); 1473 1474 rb->ClassID = 0; 1475 rb->Name = name; 1476 rb->RefCount = 0; 1477 rb->Delete = _mesa_delete_renderbuffer; 1478 1479 /* The rest of these should be set later by the caller of this function or 1480 * the AllocStorage method: 1481 */ 1482 rb->AllocStorage = NULL; 1483 1484 rb->Width = 0; 1485 rb->Height = 0; 1486 rb->InternalFormat = GL_NONE; 1487 rb->_ActualFormat = GL_NONE; 1488 rb->_BaseFormat = GL_NONE; 1489 rb->DataType = GL_NONE; 1490 rb->RedBits = rb->GreenBits = rb->BlueBits = rb->AlphaBits = 0; 1491 rb->IndexBits = 0; 1492 rb->DepthBits = 0; 1493 rb->StencilBits = 0; 1494 rb->Data = NULL; 1495 1496 /* Point back to ourself so that we don't have to check for Wrapped==NULL 1497 * all over the drivers. 1498 */ 1499 rb->Wrapped = rb; 1500 1501 rb->GetPointer = nop_get_pointer; 1502 rb->GetRow = NULL; 1503 rb->GetValues = NULL; 1504 rb->PutRow = NULL; 1505 rb->PutRowRGB = NULL; 1506 rb->PutMonoRow = NULL; 1507 rb->PutValues = NULL; 1508 rb->PutMonoValues = NULL; 1509} 1510 1511 1512/** 1513 * Allocate a new gl_renderbuffer object. This can be used for user-created 1514 * renderbuffers or window-system renderbuffers. 1515 */ 1516struct gl_renderbuffer * 1517_mesa_new_renderbuffer(GLcontext *ctx, GLuint name) 1518{ 1519 struct gl_renderbuffer *rb = CALLOC_STRUCT(gl_renderbuffer); 1520 if (rb) { 1521 _mesa_init_renderbuffer(rb, name); 1522 } 1523 return rb; 1524} 1525 1526 1527/** 1528 * Delete a gl_framebuffer. 1529 * This is the default function for renderbuffer->Delete(). 1530 */ 1531void 1532_mesa_delete_renderbuffer(struct gl_renderbuffer *rb) 1533{ 1534 if (rb->Data) { 1535 _mesa_free(rb->Data); 1536 } 1537 _mesa_free(rb); 1538} 1539 1540 1541/** 1542 * Allocate a software-based renderbuffer. This is called via the 1543 * ctx->Driver.NewRenderbuffer() function when the user creates a new 1544 * renderbuffer. 1545 * This would not be used for hardware-based renderbuffers. 1546 */ 1547struct gl_renderbuffer * 1548_mesa_new_soft_renderbuffer(GLcontext *ctx, GLuint name) 1549{ 1550 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, name); 1551 if (rb) { 1552 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1553 /* Normally, one would setup the PutRow, GetRow, etc functions here. 1554 * But we're doing that in the _mesa_soft_renderbuffer_storage() function 1555 * instead. 1556 */ 1557 } 1558 return rb; 1559} 1560 1561 1562/** 1563 * Add software-based color renderbuffers to the given framebuffer. 1564 * This is a helper routine for device drivers when creating a 1565 * window system framebuffer (not a user-created render/framebuffer). 1566 * Once this function is called, you can basically forget about this 1567 * renderbuffer; core Mesa will handle all the buffer management and 1568 * rendering! 1569 */ 1570GLboolean 1571_mesa_add_color_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1572 GLuint rgbBits, GLuint alphaBits, 1573 GLboolean frontLeft, GLboolean backLeft, 1574 GLboolean frontRight, GLboolean backRight) 1575{ 1576 GLuint b; 1577 1578 if (rgbBits > 16 || alphaBits > 16) { 1579 _mesa_problem(ctx, 1580 "Unsupported bit depth in _mesa_add_color_renderbuffers"); 1581 return GL_FALSE; 1582 } 1583 1584 assert(MAX_COLOR_ATTACHMENTS >= 4); 1585 1586 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1587 struct gl_renderbuffer *rb; 1588 1589 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1590 continue; 1591 else if (b == BUFFER_BACK_LEFT && !backLeft) 1592 continue; 1593 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1594 continue; 1595 else if (b == BUFFER_BACK_RIGHT && !backRight) 1596 continue; 1597 1598 assert(fb->Attachment[b].Renderbuffer == NULL); 1599 1600 rb = _mesa_new_renderbuffer(ctx, 0); 1601 if (!rb) { 1602 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); 1603 return GL_FALSE; 1604 } 1605 1606 if (rgbBits <= 8) { 1607 if (alphaBits) 1608 rb->_ActualFormat = GL_RGBA8; 1609 else 1610 rb->_ActualFormat = GL_RGB8; 1611 } 1612 else { 1613 assert(rgbBits <= 16); 1614 if (alphaBits) 1615 rb->_ActualFormat = GL_RGBA16; 1616 else 1617 rb->_ActualFormat = GL_RGBA16; /* don't really have RGB16 yet */ 1618 } 1619 rb->InternalFormat = rb->_ActualFormat; 1620 1621 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1622 _mesa_add_renderbuffer(fb, b, rb); 1623 } 1624 1625 return GL_TRUE; 1626} 1627 1628 1629/** 1630 * Add software-based color index renderbuffers to the given framebuffer. 1631 * This is a helper routine for device drivers when creating a 1632 * window system framebuffer (not a user-created render/framebuffer). 1633 * Once this function is called, you can basically forget about this 1634 * renderbuffer; core Mesa will handle all the buffer management and 1635 * rendering! 1636 */ 1637GLboolean 1638_mesa_add_color_index_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1639 GLuint indexBits, 1640 GLboolean frontLeft, GLboolean backLeft, 1641 GLboolean frontRight, GLboolean backRight) 1642{ 1643 GLuint b; 1644 1645 if (indexBits > 8) { 1646 _mesa_problem(ctx, 1647 "Unsupported bit depth in _mesa_add_color_index_renderbuffers"); 1648 return GL_FALSE; 1649 } 1650 1651 assert(MAX_COLOR_ATTACHMENTS >= 4); 1652 1653 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1654 struct gl_renderbuffer *rb; 1655 1656 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1657 continue; 1658 else if (b == BUFFER_BACK_LEFT && !backLeft) 1659 continue; 1660 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1661 continue; 1662 else if (b == BUFFER_BACK_RIGHT && !backRight) 1663 continue; 1664 1665 assert(fb->Attachment[b].Renderbuffer == NULL); 1666 1667 rb = _mesa_new_renderbuffer(ctx, 0); 1668 if (!rb) { 1669 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer"); 1670 return GL_FALSE; 1671 } 1672 1673 if (indexBits <= 8) { 1674 /* only support GLuint for now */ 1675 /*rb->InternalFormat = GL_COLOR_INDEX8_EXT;*/ 1676 rb->_ActualFormat = COLOR_INDEX32; 1677 } 1678 else { 1679 rb->_ActualFormat = COLOR_INDEX32; 1680 } 1681 rb->InternalFormat = rb->_ActualFormat; 1682 1683 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1684 _mesa_add_renderbuffer(fb, b, rb); 1685 } 1686 1687 return GL_TRUE; 1688} 1689 1690 1691/** 1692 * Add software-based alpha renderbuffers to the given framebuffer. 1693 * This is a helper routine for device drivers when creating a 1694 * window system framebuffer (not a user-created render/framebuffer). 1695 * Once this function is called, you can basically forget about this 1696 * renderbuffer; core Mesa will handle all the buffer management and 1697 * rendering! 1698 */ 1699GLboolean 1700_mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1701 GLuint alphaBits, 1702 GLboolean frontLeft, GLboolean backLeft, 1703 GLboolean frontRight, GLboolean backRight) 1704{ 1705 GLuint b; 1706 1707 /* for window system framebuffers only! */ 1708 assert(fb->Name == 0); 1709 1710 if (alphaBits > 8) { 1711 _mesa_problem(ctx, 1712 "Unsupported bit depth in _mesa_add_alpha_renderbuffers"); 1713 return GL_FALSE; 1714 } 1715 1716 assert(MAX_COLOR_ATTACHMENTS >= 4); 1717 1718 /* Wrap each of the RGB color buffers with an alpha renderbuffer. 1719 */ 1720 for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) { 1721 struct gl_renderbuffer *arb; 1722 1723 if (b == BUFFER_FRONT_LEFT && !frontLeft) 1724 continue; 1725 else if (b == BUFFER_BACK_LEFT && !backLeft) 1726 continue; 1727 else if (b == BUFFER_FRONT_RIGHT && !frontRight) 1728 continue; 1729 else if (b == BUFFER_BACK_RIGHT && !backRight) 1730 continue; 1731 1732 /* the RGB buffer to wrap must already exist!! */ 1733 assert(fb->Attachment[b].Renderbuffer); 1734 1735 /* only GLubyte supported for now */ 1736 assert(fb->Attachment[b].Renderbuffer->DataType == GL_UNSIGNED_BYTE); 1737 1738 /* allocate alpha renderbuffer */ 1739 arb = _mesa_new_renderbuffer(ctx, 0); 1740 if (!arb) { 1741 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating alpha buffer"); 1742 return GL_FALSE; 1743 } 1744 1745 /* wrap the alpha renderbuffer around the RGB renderbuffer */ 1746 arb->Wrapped = fb->Attachment[b].Renderbuffer; 1747 1748 /* Set up my alphabuffer fields and plug in my functions. 1749 * The functions will put/get the alpha values from/to RGBA arrays 1750 * and then call the wrapped buffer's functions to handle the RGB 1751 * values. 1752 */ 1753 arb->InternalFormat = arb->Wrapped->InternalFormat; 1754 arb->_ActualFormat = GL_ALPHA8; 1755 arb->_BaseFormat = arb->Wrapped->_BaseFormat; 1756 arb->DataType = arb->Wrapped->DataType; 1757 arb->AllocStorage = alloc_storage_alpha8; 1758 arb->Delete = delete_renderbuffer_alpha8; 1759 arb->GetPointer = get_pointer_alpha8; 1760 arb->GetRow = get_row_alpha8; 1761 arb->GetValues = get_values_alpha8; 1762 arb->PutRow = put_row_alpha8; 1763 arb->PutRowRGB = put_row_rgb_alpha8; 1764 arb->PutMonoRow = put_mono_row_alpha8; 1765 arb->PutValues = put_values_alpha8; 1766 arb->PutMonoValues = put_mono_values_alpha8; 1767 1768 /* clear the pointer to avoid assertion/sanity check failure later */ 1769 fb->Attachment[b].Renderbuffer = NULL; 1770 1771 /* plug the alpha renderbuffer into the colorbuffer attachment */ 1772 _mesa_add_renderbuffer(fb, b, arb); 1773 } 1774 1775 return GL_TRUE; 1776} 1777 1778 1779/** 1780 * For framebuffers that use a software alpha channel wrapper 1781 * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, 1782 * copy the back buffer alpha channel into the front buffer alpha channel. 1783 */ 1784void 1785_mesa_copy_soft_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb) 1786{ 1787 if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && 1788 fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) 1789 copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, 1790 fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); 1791 1792 1793 if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && 1794 fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) 1795 copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, 1796 fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); 1797} 1798 1799 1800/** 1801 * Add a software-based depth renderbuffer to the given framebuffer. 1802 * This is a helper routine for device drivers when creating a 1803 * window system framebuffer (not a user-created render/framebuffer). 1804 * Once this function is called, you can basically forget about this 1805 * renderbuffer; core Mesa will handle all the buffer management and 1806 * rendering! 1807 */ 1808GLboolean 1809_mesa_add_depth_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1810 GLuint depthBits) 1811{ 1812 struct gl_renderbuffer *rb; 1813 1814 if (depthBits > 32) { 1815 _mesa_problem(ctx, 1816 "Unsupported depthBits in _mesa_add_depth_renderbuffer"); 1817 return GL_FALSE; 1818 } 1819 1820 assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL); 1821 1822 rb = _mesa_new_renderbuffer(ctx, 0); 1823 if (!rb) { 1824 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer"); 1825 return GL_FALSE; 1826 } 1827 1828 if (depthBits <= 16) { 1829 rb->_ActualFormat = GL_DEPTH_COMPONENT16; 1830 } 1831 else if (depthBits <= 24) { 1832 rb->_ActualFormat = GL_DEPTH_COMPONENT24; 1833 } 1834 else { 1835 rb->_ActualFormat = GL_DEPTH_COMPONENT32; 1836 } 1837 rb->InternalFormat = rb->_ActualFormat; 1838 1839 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1840 _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb); 1841 1842 return GL_TRUE; 1843} 1844 1845 1846/** 1847 * Add a software-based stencil renderbuffer to the given framebuffer. 1848 * This is a helper routine for device drivers when creating a 1849 * window system framebuffer (not a user-created render/framebuffer). 1850 * Once this function is called, you can basically forget about this 1851 * renderbuffer; core Mesa will handle all the buffer management and 1852 * rendering! 1853 */ 1854GLboolean 1855_mesa_add_stencil_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1856 GLuint stencilBits) 1857{ 1858 struct gl_renderbuffer *rb; 1859 1860 if (stencilBits > 16) { 1861 _mesa_problem(ctx, 1862 "Unsupported stencilBits in _mesa_add_stencil_renderbuffer"); 1863 return GL_FALSE; 1864 } 1865 1866 assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL); 1867 1868 rb = _mesa_new_renderbuffer(ctx, 0); 1869 if (!rb) { 1870 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer"); 1871 return GL_FALSE; 1872 } 1873 1874 if (stencilBits <= 8) { 1875 rb->_ActualFormat = GL_STENCIL_INDEX8_EXT; 1876 } 1877 else { 1878 /* not really supported (see s_stencil.c code) */ 1879 rb->_ActualFormat = GL_STENCIL_INDEX16_EXT; 1880 } 1881 rb->InternalFormat = rb->_ActualFormat; 1882 1883 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1884 _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb); 1885 1886 return GL_TRUE; 1887} 1888 1889 1890/** 1891 * Add a software-based accumulation renderbuffer to the given framebuffer. 1892 * This is a helper routine for device drivers when creating a 1893 * window system framebuffer (not a user-created render/framebuffer). 1894 * Once this function is called, you can basically forget about this 1895 * renderbuffer; core Mesa will handle all the buffer management and 1896 * rendering! 1897 */ 1898GLboolean 1899_mesa_add_accum_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, 1900 GLuint redBits, GLuint greenBits, 1901 GLuint blueBits, GLuint alphaBits) 1902{ 1903 struct gl_renderbuffer *rb; 1904 1905 if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) { 1906 _mesa_problem(ctx, 1907 "Unsupported accumBits in _mesa_add_accum_renderbuffer"); 1908 return GL_FALSE; 1909 } 1910 1911 assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL); 1912 1913 rb = _mesa_new_renderbuffer(ctx, 0); 1914 if (!rb) { 1915 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1916 return GL_FALSE; 1917 } 1918 1919 rb->_ActualFormat = GL_RGBA16; 1920 rb->InternalFormat = GL_RGBA16; 1921 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1922 _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb); 1923 1924 return GL_TRUE; 1925} 1926 1927 1928 1929/** 1930 * Add a software-based accumulation renderbuffer to the given framebuffer. 1931 * This is a helper routine for device drivers when creating a 1932 * window system framebuffer (not a user-created render/framebuffer). 1933 * Once this function is called, you can basically forget about this 1934 * renderbuffer; core Mesa will handle all the buffer management and 1935 * rendering! 1936 * 1937 * NOTE: color-index aux buffers not supported. 1938 */ 1939GLboolean 1940_mesa_add_aux_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, 1941 GLuint colorBits, GLuint numBuffers) 1942{ 1943 GLuint i; 1944 1945 if (colorBits > 16) { 1946 _mesa_problem(ctx, 1947 "Unsupported accumBits in _mesa_add_aux_renderbuffers"); 1948 return GL_FALSE; 1949 } 1950 1951 assert(numBuffers < MAX_AUX_BUFFERS); 1952 1953 for (i = 0; i < numBuffers; i++) { 1954 struct gl_renderbuffer *rb = _mesa_new_renderbuffer(ctx, 0); 1955 1956 assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL); 1957 1958 if (!rb) { 1959 _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer"); 1960 return GL_FALSE; 1961 } 1962 1963 if (colorBits <= 8) { 1964 rb->_ActualFormat = GL_RGBA8; 1965 } 1966 else { 1967 rb->_ActualFormat = GL_RGBA16; 1968 } 1969 rb->InternalFormat = rb->_ActualFormat; 1970 1971 rb->AllocStorage = _mesa_soft_renderbuffer_storage; 1972 _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb); 1973 } 1974 return GL_TRUE; 1975} 1976 1977 1978/** 1979 * Create/attach software-based renderbuffers to the given framebuffer. 1980 * This is a helper routine for device drivers. Drivers can just as well 1981 * call the individual _mesa_add_*_renderbuffer() routines directly. 1982 */ 1983void 1984_mesa_add_soft_renderbuffers(struct gl_framebuffer *fb, 1985 GLboolean color, 1986 GLboolean depth, 1987 GLboolean stencil, 1988 GLboolean accum, 1989 GLboolean alpha, 1990 GLboolean aux) 1991{ 1992 GLboolean frontLeft = GL_TRUE; 1993 GLboolean backLeft = fb->Visual.doubleBufferMode; 1994 GLboolean frontRight = fb->Visual.stereoMode; 1995 GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode; 1996 1997 if (color) { 1998 if (fb->Visual.rgbMode) { 1999 assert(fb->Visual.redBits == fb->Visual.greenBits); 2000 assert(fb->Visual.redBits == fb->Visual.blueBits); 2001 _mesa_add_color_renderbuffers(NULL, fb, 2002 fb->Visual.redBits, 2003 fb->Visual.alphaBits, 2004 frontLeft, backLeft, 2005 frontRight, backRight); 2006 } 2007 else { 2008 _mesa_add_color_index_renderbuffers(NULL, fb, 2009 fb->Visual.indexBits, 2010 frontLeft, backLeft, 2011 frontRight, backRight); 2012 } 2013 } 2014 2015 if (depth) { 2016 assert(fb->Visual.depthBits > 0); 2017 _mesa_add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits); 2018 } 2019 2020 if (stencil) { 2021 assert(fb->Visual.stencilBits > 0); 2022 _mesa_add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits); 2023 } 2024 2025 if (accum) { 2026 assert(fb->Visual.rgbMode); 2027 assert(fb->Visual.accumRedBits > 0); 2028 assert(fb->Visual.accumGreenBits > 0); 2029 assert(fb->Visual.accumBlueBits > 0); 2030 _mesa_add_accum_renderbuffer(NULL, fb, 2031 fb->Visual.accumRedBits, 2032 fb->Visual.accumGreenBits, 2033 fb->Visual.accumBlueBits, 2034 fb->Visual.accumAlphaBits); 2035 } 2036 2037 if (aux) { 2038 assert(fb->Visual.rgbMode); 2039 assert(fb->Visual.numAuxBuffers > 0); 2040 _mesa_add_aux_renderbuffers(NULL, fb, fb->Visual.redBits, 2041 fb->Visual.numAuxBuffers); 2042 } 2043 2044 if (alpha) { 2045 assert(fb->Visual.rgbMode); 2046 assert(fb->Visual.alphaBits > 0); 2047 _mesa_add_alpha_renderbuffers(NULL, fb, fb->Visual.alphaBits, 2048 frontLeft, backLeft, 2049 frontRight, backRight); 2050 } 2051 2052#if 0 2053 if (multisample) { 2054 /* maybe someday */ 2055 } 2056#endif 2057} 2058 2059 2060/** 2061 * Attach a renderbuffer to a framebuffer. 2062 */ 2063void 2064_mesa_add_renderbuffer(struct gl_framebuffer *fb, 2065 GLuint bufferName, struct gl_renderbuffer *rb) 2066{ 2067 assert(fb); 2068 assert(rb); 2069 assert(bufferName < BUFFER_COUNT); 2070 2071 /* There should be no previous renderbuffer on this attachment point, 2072 * with the exception of depth/stencil since the same renderbuffer may 2073 * be used for both. 2074 */ 2075 assert(bufferName == BUFFER_DEPTH || 2076 bufferName == BUFFER_STENCIL || 2077 fb->Attachment[bufferName].Renderbuffer == NULL); 2078 2079 /* winsys vs. user-created buffer cross check */ 2080 if (fb->Name) { 2081 assert(rb->Name); 2082 } 2083 else { 2084 assert(!rb->Name); 2085 } 2086 2087 /* If Mesa's compiled with deep color channels (16 or 32 bits / channel) 2088 * and the device driver is expecting 8-bit values (GLubyte), we can 2089 * use a "renderbuffer adaptor/wrapper" to do the necessary conversions. 2090 */ 2091 if (rb->_BaseFormat == GL_RGBA) { 2092 if (CHAN_BITS == 16 && rb->DataType == GL_UNSIGNED_BYTE) { 2093 GET_CURRENT_CONTEXT(ctx); 2094 rb = _mesa_new_renderbuffer_16wrap8(ctx, rb); 2095 } 2096 else if (CHAN_BITS == 32 && rb->DataType == GL_UNSIGNED_BYTE) { 2097 GET_CURRENT_CONTEXT(ctx); 2098 rb = _mesa_new_renderbuffer_32wrap8(ctx, rb); 2099 } 2100 else if (CHAN_BITS == 32 && rb->DataType == GL_UNSIGNED_SHORT) { 2101 GET_CURRENT_CONTEXT(ctx); 2102 rb = _mesa_new_renderbuffer_32wrap16(ctx, rb); 2103 } 2104 } 2105 2106 fb->Attachment[bufferName].Type = GL_RENDERBUFFER_EXT; 2107 fb->Attachment[bufferName].Complete = GL_TRUE; 2108 _mesa_reference_renderbuffer(&fb->Attachment[bufferName].Renderbuffer, rb); 2109} 2110 2111 2112/** 2113 * Remove the named renderbuffer from the given framebuffer. 2114 */ 2115void 2116_mesa_remove_renderbuffer(struct gl_framebuffer *fb, GLuint bufferName) 2117{ 2118 struct gl_renderbuffer *rb; 2119 2120 assert(bufferName < BUFFER_COUNT); 2121 2122 rb = fb->Attachment[bufferName].Renderbuffer; 2123 if (!rb) 2124 return; 2125 2126 _mesa_reference_renderbuffer(&rb, NULL); 2127 2128 fb->Attachment[bufferName].Renderbuffer = NULL; 2129} 2130 2131 2132/** 2133 * Set *ptr to point to rb. If *ptr points to another renderbuffer, 2134 * dereference that buffer first. The new renderbuffer's refcount will 2135 * be incremented. The old renderbuffer's refcount will be decremented. 2136 */ 2137void 2138_mesa_reference_renderbuffer(struct gl_renderbuffer **ptr, 2139 struct gl_renderbuffer *rb) 2140{ 2141 assert(ptr); 2142 if (*ptr == rb) { 2143 /* no change */ 2144 return; 2145 } 2146 2147 if (*ptr) { 2148 /* Unreference the old renderbuffer */ 2149 GLboolean deleteFlag = GL_FALSE; 2150 struct gl_renderbuffer *oldRb = *ptr; 2151 2152 _glthread_LOCK_MUTEX(oldRb->Mutex); 2153 ASSERT(oldRb->RefCount > 0); 2154 oldRb->RefCount--; 2155 /*printf("RB DECR %p to %d\n", (void*) oldRb, oldRb->RefCount);*/ 2156 deleteFlag = (oldRb->RefCount == 0); 2157 _glthread_UNLOCK_MUTEX(oldRb->Mutex); 2158 2159 if (deleteFlag) 2160 oldRb->Delete(oldRb); 2161 2162 *ptr = NULL; 2163 } 2164 assert(!*ptr); 2165 2166 if (rb) { 2167 /* reference new renderbuffer */ 2168 _glthread_LOCK_MUTEX(rb->Mutex); 2169 rb->RefCount++; 2170 /*printf("RB REF %p to %d\n", (void*)rb, rb->RefCount);*/ 2171 _glthread_UNLOCK_MUTEX(rb->Mutex); 2172 *ptr = rb; 2173 } 2174} 2175 2176 2177/** 2178 * Create a new combined depth/stencil renderbuffer for implementing 2179 * the GL_EXT_packed_depth_stencil extension. 2180 * \return new depth/stencil renderbuffer 2181 */ 2182struct gl_renderbuffer * 2183_mesa_new_depthstencil_renderbuffer(GLcontext *ctx, GLuint name) 2184{ 2185 struct gl_renderbuffer *dsrb; 2186 2187 dsrb = _mesa_new_renderbuffer(ctx, name); 2188 if (!dsrb) 2189 return NULL; 2190 2191 /* init fields not covered by _mesa_new_renderbuffer() */ 2192 dsrb->InternalFormat = GL_DEPTH24_STENCIL8_EXT; 2193 dsrb->_ActualFormat = GL_DEPTH24_STENCIL8_EXT; 2194 dsrb->AllocStorage = _mesa_soft_renderbuffer_storage; 2195 2196 return dsrb; 2197} 2198