1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 29 /** 30 * Framebuffer/renderbuffer functions. 31 * 32 * \author Brian Paul 33 */ 34 35 36 #include "main/imports.h" 37 #include "main/context.h" 38 #include "main/fbobject.h" 39 #include "main/framebuffer.h" 40 #include "main/glformats.h" 41 #include "main/macros.h" 42 #include "main/renderbuffer.h" 43 #include "main/state.h" 44 45 #include "pipe/p_context.h" 46 #include "pipe/p_defines.h" 47 #include "pipe/p_screen.h" 48 #include "st_atom.h" 49 #include "st_context.h" 50 #include "st_cb_fbo.h" 51 #include "st_cb_flush.h" 52 #include "st_cb_texture.h" 53 #include "st_format.h" 54 #include "st_texture.h" 55 #include "st_manager.h" 56 57 #include "util/u_format.h" 58 #include "util/u_inlines.h" 59 #include "util/u_surface.h" 60 61 62 static GLboolean 63 st_renderbuffer_alloc_sw_storage(struct gl_context * ctx, 64 struct gl_renderbuffer *rb, 65 GLenum internalFormat, 66 GLuint width, GLuint height) 67 { 68 struct st_context *st = st_context(ctx); 69 struct st_renderbuffer *strb = st_renderbuffer(rb); 70 enum pipe_format format; 71 size_t size; 72 73 free(strb->data); 74 strb->data = NULL; 75 76 if (internalFormat == GL_RGBA16_SNORM) { 77 /* Special case for software accum buffers. Otherwise, if the 78 * call to st_choose_renderbuffer_format() fails (because the 79 * driver doesn't support signed 16-bit/channel colors) we'd 80 * just return without allocating the software accum buffer. 81 */ 82 format = PIPE_FORMAT_R16G16B16A16_SNORM; 83 } 84 else { 85 format = st_choose_renderbuffer_format(st, internalFormat, 0); 86 87 /* Not setting gl_renderbuffer::Format here will cause 88 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called. 89 */ 90 if (format == PIPE_FORMAT_NONE) { 91 return GL_TRUE; 92 } 93 } 94 95 strb->Base.Format = st_pipe_format_to_mesa_format(format); 96 97 size = _mesa_format_image_size(strb->Base.Format, width, height, 1); 98 strb->data = malloc(size); 99 return strb->data != NULL; 100 } 101 102 103 /** 104 * gl_renderbuffer::AllocStorage() 105 * This is called to allocate the original drawing surface, and 106 * during window resize. 107 */ 108 static GLboolean 109 st_renderbuffer_alloc_storage(struct gl_context * ctx, 110 struct gl_renderbuffer *rb, 111 GLenum internalFormat, 112 GLuint width, GLuint height) 113 { 114 struct st_context *st = st_context(ctx); 115 struct pipe_screen *screen = st->pipe->screen; 116 struct st_renderbuffer *strb = st_renderbuffer(rb); 117 enum pipe_format format = PIPE_FORMAT_NONE; 118 struct pipe_resource templ; 119 120 /* init renderbuffer fields */ 121 strb->Base.Width = width; 122 strb->Base.Height = height; 123 strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); 124 strb->defined = GL_FALSE; /* undefined contents now */ 125 126 if (strb->software) { 127 return st_renderbuffer_alloc_sw_storage(ctx, rb, internalFormat, 128 width, height); 129 } 130 131 /* Free the old surface and texture 132 */ 133 pipe_surface_reference(&strb->surface_srgb, NULL); 134 pipe_surface_reference(&strb->surface_linear, NULL); 135 strb->surface = NULL; 136 pipe_resource_reference(&strb->texture, NULL); 137 138 /* If an sRGB framebuffer is unsupported, sRGB formats behave like linear 139 * formats. 140 */ 141 if (!ctx->Extensions.EXT_framebuffer_sRGB) { 142 internalFormat = _mesa_get_linear_internalformat(internalFormat); 143 } 144 145 /* Handle multisample renderbuffers first. 146 * 147 * From ARB_framebuffer_object: 148 * If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero. 149 * Otherwise <samples> represents a request for a desired minimum 150 * number of samples. Since different implementations may support 151 * different sample counts for multisampled rendering, the actual 152 * number of samples allocated for the renderbuffer image is 153 * implementation dependent. However, the resulting value for 154 * RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal 155 * to <samples> and no more than the next larger sample count supported 156 * by the implementation. 157 * 158 * Find the supported number of samples >= rb->NumSamples 159 */ 160 if (rb->NumSamples > 0) { 161 unsigned start, i; 162 163 if (ctx->Const.MaxSamples > 1 && rb->NumSamples == 1) { 164 /* don't try num_samples = 1 with drivers that support real msaa */ 165 start = 2; 166 } else { 167 start = rb->NumSamples; 168 } 169 170 for (i = start; i <= ctx->Const.MaxSamples; i++) { 171 format = st_choose_renderbuffer_format(st, internalFormat, i); 172 173 if (format != PIPE_FORMAT_NONE) { 174 rb->NumSamples = i; 175 break; 176 } 177 } 178 } else { 179 format = st_choose_renderbuffer_format(st, internalFormat, 0); 180 } 181 182 /* Not setting gl_renderbuffer::Format here will cause 183 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called. 184 */ 185 if (format == PIPE_FORMAT_NONE) { 186 return GL_TRUE; 187 } 188 189 strb->Base.Format = st_pipe_format_to_mesa_format(format); 190 191 if (width == 0 || height == 0) { 192 /* if size is zero, nothing to allocate */ 193 return GL_TRUE; 194 } 195 196 /* Setup new texture template. 197 */ 198 memset(&templ, 0, sizeof(templ)); 199 templ.target = st->internal_target; 200 templ.format = format; 201 templ.width0 = width; 202 templ.height0 = height; 203 templ.depth0 = 1; 204 templ.array_size = 1; 205 templ.nr_samples = rb->NumSamples; 206 if (util_format_is_depth_or_stencil(format)) { 207 templ.bind = PIPE_BIND_DEPTH_STENCIL; 208 } 209 else if (strb->Base.Name != 0) { 210 /* this is a user-created renderbuffer */ 211 templ.bind = PIPE_BIND_RENDER_TARGET; 212 } 213 else { 214 /* this is a window-system buffer */ 215 templ.bind = (PIPE_BIND_DISPLAY_TARGET | 216 PIPE_BIND_RENDER_TARGET); 217 } 218 219 strb->texture = screen->resource_create(screen, &templ); 220 221 if (!strb->texture) 222 return FALSE; 223 224 st_update_renderbuffer_surface(st, strb); 225 return strb->surface != NULL; 226 } 227 228 229 /** 230 * gl_renderbuffer::Delete() 231 */ 232 static void 233 st_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb) 234 { 235 struct st_renderbuffer *strb = st_renderbuffer(rb); 236 if (ctx) { 237 struct st_context *st = st_context(ctx); 238 pipe_surface_release(st->pipe, &strb->surface_srgb); 239 pipe_surface_release(st->pipe, &strb->surface_linear); 240 strb->surface = NULL; 241 } 242 pipe_resource_reference(&strb->texture, NULL); 243 free(strb->data); 244 _mesa_delete_renderbuffer(ctx, rb); 245 } 246 247 248 /** 249 * Called via ctx->Driver.NewRenderbuffer() 250 */ 251 static struct gl_renderbuffer * 252 st_new_renderbuffer(struct gl_context *ctx, GLuint name) 253 { 254 struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer); 255 if (strb) { 256 assert(name != 0); 257 _mesa_init_renderbuffer(&strb->Base, name); 258 strb->Base.Delete = st_renderbuffer_delete; 259 strb->Base.AllocStorage = st_renderbuffer_alloc_storage; 260 return &strb->Base; 261 } 262 return NULL; 263 } 264 265 266 /** 267 * Allocate a renderbuffer for an on-screen window (not a user-created 268 * renderbuffer). The window system code determines the format. 269 */ 270 struct gl_renderbuffer * 271 st_new_renderbuffer_fb(enum pipe_format format, unsigned samples, boolean sw) 272 { 273 struct st_renderbuffer *strb; 274 275 strb = ST_CALLOC_STRUCT(st_renderbuffer); 276 if (!strb) { 277 _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer"); 278 return NULL; 279 } 280 281 _mesa_init_renderbuffer(&strb->Base, 0); 282 strb->Base.ClassID = 0x4242; /* just a unique value */ 283 strb->Base.NumSamples = samples; 284 strb->Base.Format = st_pipe_format_to_mesa_format(format); 285 strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format); 286 strb->software = sw; 287 288 switch (format) { 289 case PIPE_FORMAT_B10G10R10A2_UNORM: 290 strb->Base.InternalFormat = GL_RGB10_A2; 291 break; 292 case PIPE_FORMAT_B10G10R10X2_UNORM: 293 strb->Base.InternalFormat = GL_RGB10; 294 break; 295 case PIPE_FORMAT_R8G8B8A8_UNORM: 296 case PIPE_FORMAT_B8G8R8A8_UNORM: 297 case PIPE_FORMAT_A8R8G8B8_UNORM: 298 strb->Base.InternalFormat = GL_RGBA8; 299 break; 300 case PIPE_FORMAT_R8G8B8X8_UNORM: 301 case PIPE_FORMAT_B8G8R8X8_UNORM: 302 case PIPE_FORMAT_X8R8G8B8_UNORM: 303 strb->Base.InternalFormat = GL_RGB8; 304 break; 305 case PIPE_FORMAT_R8G8B8A8_SRGB: 306 case PIPE_FORMAT_B8G8R8A8_SRGB: 307 case PIPE_FORMAT_A8R8G8B8_SRGB: 308 strb->Base.InternalFormat = GL_SRGB8_ALPHA8; 309 break; 310 case PIPE_FORMAT_R8G8B8X8_SRGB: 311 case PIPE_FORMAT_B8G8R8X8_SRGB: 312 case PIPE_FORMAT_X8R8G8B8_SRGB: 313 strb->Base.InternalFormat = GL_SRGB8; 314 break; 315 case PIPE_FORMAT_B5G5R5A1_UNORM: 316 strb->Base.InternalFormat = GL_RGB5_A1; 317 break; 318 case PIPE_FORMAT_B4G4R4A4_UNORM: 319 strb->Base.InternalFormat = GL_RGBA4; 320 break; 321 case PIPE_FORMAT_B5G6R5_UNORM: 322 strb->Base.InternalFormat = GL_RGB565; 323 break; 324 case PIPE_FORMAT_Z16_UNORM: 325 strb->Base.InternalFormat = GL_DEPTH_COMPONENT16; 326 break; 327 case PIPE_FORMAT_Z32_UNORM: 328 strb->Base.InternalFormat = GL_DEPTH_COMPONENT32; 329 break; 330 case PIPE_FORMAT_Z24_UNORM_S8_UINT: 331 case PIPE_FORMAT_S8_UINT_Z24_UNORM: 332 strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT; 333 break; 334 case PIPE_FORMAT_Z24X8_UNORM: 335 case PIPE_FORMAT_X8Z24_UNORM: 336 strb->Base.InternalFormat = GL_DEPTH_COMPONENT24; 337 break; 338 case PIPE_FORMAT_S8_UINT: 339 strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT; 340 break; 341 case PIPE_FORMAT_R16G16B16A16_SNORM: 342 /* accum buffer */ 343 strb->Base.InternalFormat = GL_RGBA16_SNORM; 344 break; 345 case PIPE_FORMAT_R16G16B16A16_UNORM: 346 strb->Base.InternalFormat = GL_RGBA16; 347 break; 348 case PIPE_FORMAT_R8_UNORM: 349 strb->Base.InternalFormat = GL_R8; 350 break; 351 case PIPE_FORMAT_R8G8_UNORM: 352 strb->Base.InternalFormat = GL_RG8; 353 break; 354 case PIPE_FORMAT_R16_UNORM: 355 strb->Base.InternalFormat = GL_R16; 356 break; 357 case PIPE_FORMAT_R16G16_UNORM: 358 strb->Base.InternalFormat = GL_RG16; 359 break; 360 case PIPE_FORMAT_R32G32B32A32_FLOAT: 361 strb->Base.InternalFormat = GL_RGBA32F; 362 break; 363 case PIPE_FORMAT_R16G16B16A16_FLOAT: 364 strb->Base.InternalFormat = GL_RGBA16F; 365 break; 366 default: 367 _mesa_problem(NULL, 368 "Unexpected format %s in st_new_renderbuffer_fb", 369 util_format_name(format)); 370 free(strb); 371 return NULL; 372 } 373 374 /* st-specific methods */ 375 strb->Base.Delete = st_renderbuffer_delete; 376 strb->Base.AllocStorage = st_renderbuffer_alloc_storage; 377 378 /* surface is allocated in st_renderbuffer_alloc_storage() */ 379 strb->surface = NULL; 380 381 return &strb->Base; 382 } 383 384 385 /** 386 * Create or update the pipe_surface of a FBO renderbuffer. 387 * This is usually called after st_finalize_texture. 388 */ 389 void 390 st_update_renderbuffer_surface(struct st_context *st, 391 struct st_renderbuffer *strb) 392 { 393 struct pipe_context *pipe = st->pipe; 394 struct pipe_resource *resource = strb->texture; 395 const struct st_texture_object *stTexObj = NULL; 396 unsigned rtt_width = strb->Base.Width; 397 unsigned rtt_height = strb->Base.Height; 398 unsigned rtt_depth = strb->Base.Depth; 399 400 /* 401 * For winsys fbo, it is possible that the renderbuffer is sRGB-capable but 402 * the format of strb->texture is linear (because we have no control over 403 * the format). Check strb->Base.Format instead of strb->texture->format 404 * to determine if the rb is sRGB-capable. 405 */ 406 boolean enable_srgb = st->ctx->Color.sRGBEnabled && 407 _mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB; 408 enum pipe_format format = resource->format; 409 410 if (strb->is_rtt) { 411 stTexObj = st_texture_object(strb->Base.TexImage->TexObject); 412 if (stTexObj->surface_based) 413 format = stTexObj->surface_format; 414 } 415 416 format = enable_srgb ? util_format_srgb(format) : util_format_linear(format); 417 418 if (resource->target == PIPE_TEXTURE_1D_ARRAY) { 419 rtt_depth = rtt_height; 420 rtt_height = 1; 421 } 422 423 /* find matching mipmap level size */ 424 unsigned level; 425 for (level = 0; level <= resource->last_level; level++) { 426 if (u_minify(resource->width0, level) == rtt_width && 427 u_minify(resource->height0, level) == rtt_height && 428 (resource->target != PIPE_TEXTURE_3D || 429 u_minify(resource->depth0, level) == rtt_depth)) { 430 break; 431 } 432 } 433 assert(level <= resource->last_level); 434 435 /* determine the layer bounds */ 436 unsigned first_layer, last_layer; 437 if (strb->rtt_layered) { 438 first_layer = 0; 439 last_layer = util_max_layer(strb->texture, level); 440 } 441 else { 442 first_layer = 443 last_layer = strb->rtt_face + strb->rtt_slice; 444 } 445 446 /* Adjust for texture views */ 447 if (strb->is_rtt && resource->array_size > 1 && 448 stTexObj->base.Immutable) { 449 const struct gl_texture_object *tex = &stTexObj->base; 450 first_layer += tex->MinLayer; 451 if (!strb->rtt_layered) 452 last_layer += tex->MinLayer; 453 else 454 last_layer = MIN2(first_layer + tex->NumLayers - 1, last_layer); 455 } 456 457 struct pipe_surface **psurf = 458 enable_srgb ? &strb->surface_srgb : &strb->surface_linear; 459 struct pipe_surface *surf = *psurf; 460 461 if (!surf || 462 surf->texture->nr_samples != strb->Base.NumSamples || 463 surf->format != format || 464 surf->texture != resource || 465 surf->width != rtt_width || 466 surf->height != rtt_height || 467 surf->u.tex.level != level || 468 surf->u.tex.first_layer != first_layer || 469 surf->u.tex.last_layer != last_layer) { 470 /* create a new pipe_surface */ 471 struct pipe_surface surf_tmpl; 472 memset(&surf_tmpl, 0, sizeof(surf_tmpl)); 473 surf_tmpl.format = format; 474 surf_tmpl.u.tex.level = level; 475 surf_tmpl.u.tex.first_layer = first_layer; 476 surf_tmpl.u.tex.last_layer = last_layer; 477 478 pipe_surface_release(pipe, psurf); 479 480 *psurf = pipe->create_surface(pipe, resource, &surf_tmpl); 481 } 482 strb->surface = *psurf; 483 } 484 485 486 /** 487 * Return the pipe_resource which stores a particular texture image. 488 */ 489 static struct pipe_resource * 490 get_teximage_resource(struct gl_texture_object *texObj, 491 unsigned face, unsigned level) 492 { 493 struct st_texture_image *stImg = 494 st_texture_image(texObj->Image[face][level]); 495 496 return stImg->pt; 497 } 498 499 500 /** 501 * Called by ctx->Driver.RenderTexture 502 */ 503 static void 504 st_render_texture(struct gl_context *ctx, 505 struct gl_framebuffer *fb, 506 struct gl_renderbuffer_attachment *att) 507 { 508 struct st_context *st = st_context(ctx); 509 struct pipe_context *pipe = st->pipe; 510 struct gl_renderbuffer *rb = att->Renderbuffer; 511 struct st_renderbuffer *strb = st_renderbuffer(rb); 512 struct pipe_resource *pt; 513 514 if (!st_finalize_texture(ctx, pipe, att->Texture, att->CubeMapFace)) 515 return; 516 517 pt = get_teximage_resource(att->Texture, 518 att->CubeMapFace, 519 att->TextureLevel); 520 assert(pt); 521 522 /* point renderbuffer at texobject */ 523 strb->is_rtt = TRUE; 524 strb->rtt_face = att->CubeMapFace; 525 strb->rtt_slice = att->Zoffset; 526 strb->rtt_layered = att->Layered; 527 pipe_resource_reference(&strb->texture, pt); 528 529 st_update_renderbuffer_surface(st, strb); 530 531 /* Invalidate buffer state so that the pipe's framebuffer state 532 * gets updated. 533 * That's where the new renderbuffer (which we just created) gets 534 * passed to the pipe as a (color/depth) render target. 535 */ 536 st_invalidate_buffers(st); 537 538 539 /* Need to trigger a call to update_framebuffer() since we just 540 * attached a new renderbuffer. 541 */ 542 ctx->NewState |= _NEW_BUFFERS; 543 } 544 545 546 /** 547 * Called via ctx->Driver.FinishRenderTexture. 548 */ 549 static void 550 st_finish_render_texture(struct gl_context *ctx, struct gl_renderbuffer *rb) 551 { 552 struct st_context *st = st_context(ctx); 553 struct st_renderbuffer *strb = st_renderbuffer(rb); 554 555 if (!strb) 556 return; 557 558 strb->is_rtt = FALSE; 559 560 /* restore previous framebuffer state */ 561 st_invalidate_buffers(st); 562 } 563 564 565 /** Debug helper */ 566 static void 567 st_fbo_invalid(const char *reason) 568 { 569 if (MESA_DEBUG_FLAGS & DEBUG_INCOMPLETE_FBO) { 570 _mesa_debug(NULL, "Invalid FBO: %s\n", reason); 571 } 572 } 573 574 575 /** 576 * Validate a renderbuffer attachment for a particular set of bindings. 577 */ 578 static GLboolean 579 st_validate_attachment(struct gl_context *ctx, 580 struct pipe_screen *screen, 581 const struct gl_renderbuffer_attachment *att, 582 unsigned bindings) 583 { 584 const struct st_texture_object *stObj = st_texture_object(att->Texture); 585 enum pipe_format format; 586 mesa_format texFormat; 587 GLboolean valid; 588 589 /* Sanity check: we must be binding the surface as a (color) render target 590 * or depth/stencil target. 591 */ 592 assert(bindings == PIPE_BIND_RENDER_TARGET || 593 bindings == PIPE_BIND_DEPTH_STENCIL); 594 595 /* Only validate texture attachments for now, since 596 * st_renderbuffer_alloc_storage makes sure that 597 * the format is supported. 598 */ 599 if (att->Type != GL_TEXTURE) 600 return GL_TRUE; 601 602 if (!stObj || !stObj->pt) 603 return GL_FALSE; 604 605 format = stObj->pt->format; 606 texFormat = att->Renderbuffer->TexImage->TexFormat; 607 608 /* If the encoding is sRGB and sRGB rendering cannot be enabled, 609 * check for linear format support instead. 610 * Later when we create a surface, we change the format to a linear one. */ 611 if (!ctx->Extensions.EXT_framebuffer_sRGB && 612 _mesa_get_format_color_encoding(texFormat) == GL_SRGB) { 613 const mesa_format linearFormat = _mesa_get_srgb_format_linear(texFormat); 614 format = st_mesa_format_to_pipe_format(st_context(ctx), linearFormat); 615 } 616 617 valid = screen->is_format_supported(screen, format, 618 PIPE_TEXTURE_2D, 619 stObj->pt->nr_samples, bindings); 620 if (!valid) { 621 st_fbo_invalid("Invalid format"); 622 } 623 624 return valid; 625 } 626 627 628 /** 629 * Check that the framebuffer configuration is valid in terms of what 630 * the driver can support. 631 * 632 * For Gallium we only supports combined Z+stencil, not separate buffers. 633 */ 634 static void 635 st_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb) 636 { 637 struct st_context *st = st_context(ctx); 638 struct pipe_screen *screen = st->pipe->screen; 639 const struct gl_renderbuffer_attachment *depth = 640 &fb->Attachment[BUFFER_DEPTH]; 641 const struct gl_renderbuffer_attachment *stencil = 642 &fb->Attachment[BUFFER_STENCIL]; 643 GLuint i; 644 enum pipe_format first_format = PIPE_FORMAT_NONE; 645 boolean mixed_formats = 646 screen->get_param(screen, PIPE_CAP_MIXED_COLORBUFFER_FORMATS) != 0; 647 648 if (depth->Type && stencil->Type && depth->Type != stencil->Type) { 649 st_fbo_invalid("Different Depth/Stencil buffer formats"); 650 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 651 return; 652 } 653 if (depth->Type == GL_RENDERBUFFER_EXT && 654 stencil->Type == GL_RENDERBUFFER_EXT && 655 depth->Renderbuffer != stencil->Renderbuffer) { 656 st_fbo_invalid("Separate Depth/Stencil buffers"); 657 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 658 return; 659 } 660 if (depth->Type == GL_TEXTURE && 661 stencil->Type == GL_TEXTURE && 662 depth->Texture != stencil->Texture) { 663 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 664 st_fbo_invalid("Different Depth/Stencil textures"); 665 return; 666 } 667 668 if (!st_validate_attachment(ctx, screen, depth, PIPE_BIND_DEPTH_STENCIL)) { 669 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 670 st_fbo_invalid("Invalid depth attachment"); 671 return; 672 } 673 if (!st_validate_attachment(ctx, screen, stencil, PIPE_BIND_DEPTH_STENCIL)) { 674 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 675 st_fbo_invalid("Invalid stencil attachment"); 676 return; 677 } 678 for (i = 0; i < ctx->Const.MaxColorAttachments; i++) { 679 struct gl_renderbuffer_attachment *att = 680 &fb->Attachment[BUFFER_COLOR0 + i]; 681 enum pipe_format format; 682 683 if (!st_validate_attachment(ctx, screen, att, PIPE_BIND_RENDER_TARGET)) { 684 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 685 st_fbo_invalid("Invalid color attachment"); 686 return; 687 } 688 689 if (!mixed_formats) { 690 /* Disallow mixed formats. */ 691 if (att->Type != GL_NONE) { 692 format = st_renderbuffer(att->Renderbuffer)->surface->format; 693 } else { 694 continue; 695 } 696 697 if (first_format == PIPE_FORMAT_NONE) { 698 first_format = format; 699 } else if (format != first_format) { 700 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 701 st_fbo_invalid("Mixed color formats"); 702 return; 703 } 704 } 705 } 706 } 707 708 709 /** 710 * Called via glDrawBuffer. We only provide this driver function so that we 711 * can check if we need to allocate a new renderbuffer. Specifically, we 712 * don't usually allocate a front color buffer when using a double-buffered 713 * visual. But if the app calls glDrawBuffer(GL_FRONT) we need to allocate 714 * that buffer. Note, this is only for window system buffers, not user- 715 * created FBOs. 716 */ 717 static void 718 st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers) 719 { 720 struct st_context *st = st_context(ctx); 721 struct gl_framebuffer *fb = ctx->DrawBuffer; 722 723 (void) count; 724 (void) buffers; 725 726 if (_mesa_is_winsys_fbo(fb)) { 727 GLuint i; 728 /* add the renderbuffers on demand */ 729 for (i = 0; i < fb->_NumColorDrawBuffers; i++) { 730 gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i]; 731 732 if (idx != BUFFER_NONE) { 733 st_manager_add_color_renderbuffer(st, fb, idx); 734 } 735 } 736 } 737 } 738 739 740 /** 741 * Called via glReadBuffer. As with st_DrawBuffers, we use this function 742 * to check if we need to allocate a renderbuffer on demand. 743 */ 744 static void 745 st_ReadBuffer(struct gl_context *ctx, GLenum buffer) 746 { 747 struct st_context *st = st_context(ctx); 748 struct gl_framebuffer *fb = ctx->ReadBuffer; 749 750 (void) buffer; 751 752 /* Check if we need to allocate a front color buffer. 753 * Front buffers are often allocated on demand (other color buffers are 754 * always allocated in advance). 755 */ 756 if ((fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT || 757 fb->_ColorReadBufferIndex == BUFFER_FRONT_RIGHT) && 758 fb->Attachment[fb->_ColorReadBufferIndex].Type == GL_NONE) { 759 assert(_mesa_is_winsys_fbo(fb)); 760 /* add the buffer */ 761 st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex); 762 _mesa_update_state(ctx); 763 st_validate_state(st, ST_PIPELINE_UPDATE_FRAMEBUFFER); 764 } 765 } 766 767 768 769 /** 770 * Called via ctx->Driver.MapRenderbuffer. 771 */ 772 static void 773 st_MapRenderbuffer(struct gl_context *ctx, 774 struct gl_renderbuffer *rb, 775 GLuint x, GLuint y, GLuint w, GLuint h, 776 GLbitfield mode, 777 GLubyte **mapOut, GLint *rowStrideOut) 778 { 779 struct st_context *st = st_context(ctx); 780 struct st_renderbuffer *strb = st_renderbuffer(rb); 781 struct pipe_context *pipe = st->pipe; 782 const GLboolean invert = rb->Name == 0; 783 unsigned usage; 784 GLuint y2; 785 GLubyte *map; 786 787 if (strb->software) { 788 /* software-allocated renderbuffer (probably an accum buffer) */ 789 if (strb->data) { 790 GLint bpp = _mesa_get_format_bytes(strb->Base.Format); 791 GLint stride = _mesa_format_row_stride(strb->Base.Format, 792 strb->Base.Width); 793 *mapOut = (GLubyte *) strb->data + y * stride + x * bpp; 794 *rowStrideOut = stride; 795 } 796 else { 797 *mapOut = NULL; 798 *rowStrideOut = 0; 799 } 800 return; 801 } 802 803 usage = 0x0; 804 if (mode & GL_MAP_READ_BIT) 805 usage |= PIPE_TRANSFER_READ; 806 if (mode & GL_MAP_WRITE_BIT) 807 usage |= PIPE_TRANSFER_WRITE; 808 if (mode & GL_MAP_INVALIDATE_RANGE_BIT) 809 usage |= PIPE_TRANSFER_DISCARD_RANGE; 810 811 /* Note: y=0=bottom of buffer while y2=0=top of buffer. 812 * 'invert' will be true for window-system buffers and false for 813 * user-allocated renderbuffers and textures. 814 */ 815 if (invert) 816 y2 = strb->Base.Height - y - h; 817 else 818 y2 = y; 819 820 map = pipe_transfer_map(pipe, 821 strb->texture, 822 strb->surface->u.tex.level, 823 strb->surface->u.tex.first_layer, 824 usage, x, y2, w, h, &strb->transfer); 825 if (map) { 826 if (invert) { 827 *rowStrideOut = -(int) strb->transfer->stride; 828 map += (h - 1) * strb->transfer->stride; 829 } 830 else { 831 *rowStrideOut = strb->transfer->stride; 832 } 833 *mapOut = map; 834 } 835 else { 836 *mapOut = NULL; 837 *rowStrideOut = 0; 838 } 839 } 840 841 842 /** 843 * Called via ctx->Driver.UnmapRenderbuffer. 844 */ 845 static void 846 st_UnmapRenderbuffer(struct gl_context *ctx, 847 struct gl_renderbuffer *rb) 848 { 849 struct st_context *st = st_context(ctx); 850 struct st_renderbuffer *strb = st_renderbuffer(rb); 851 struct pipe_context *pipe = st->pipe; 852 853 if (strb->software) { 854 /* software-allocated renderbuffer (probably an accum buffer) */ 855 return; 856 } 857 858 pipe_transfer_unmap(pipe, strb->transfer); 859 strb->transfer = NULL; 860 } 861 862 863 864 void 865 st_init_fbo_functions(struct dd_function_table *functions) 866 { 867 functions->NewFramebuffer = _mesa_new_framebuffer; 868 functions->NewRenderbuffer = st_new_renderbuffer; 869 functions->FramebufferRenderbuffer = _mesa_FramebufferRenderbuffer_sw; 870 functions->RenderTexture = st_render_texture; 871 functions->FinishRenderTexture = st_finish_render_texture; 872 functions->ValidateFramebuffer = st_validate_framebuffer; 873 874 functions->DrawBuffers = st_DrawBuffers; 875 functions->ReadBuffer = st_ReadBuffer; 876 877 functions->MapRenderbuffer = st_MapRenderbuffer; 878 functions->UnmapRenderbuffer = st_UnmapRenderbuffer; 879 } 880
