intel_fbo.c revision 2e5a1a254ed81b1d3efa6064f48183eefac784d0
1/************************************************************************** 2 * 3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. 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 TUNGSTEN GRAPHICS 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#include "main/imports.h" 30#include "main/macros.h" 31#include "main/mfeatures.h" 32#include "main/mtypes.h" 33#include "main/fbobject.h" 34#include "main/framebuffer.h" 35#include "main/renderbuffer.h" 36#include "main/context.h" 37#include "main/teximage.h" 38#include "swrast/swrast.h" 39#include "drivers/common/meta.h" 40 41#include "intel_context.h" 42#include "intel_batchbuffer.h" 43#include "intel_buffers.h" 44#include "intel_fbo.h" 45#include "intel_mipmap_tree.h" 46#include "intel_regions.h" 47#include "intel_tex.h" 48#include "intel_span.h" 49#ifndef I915 50#include "brw_context.h" 51#endif 52 53#define FILE_DEBUG_FLAG DEBUG_FBO 54 55 56/** 57 * Create a new framebuffer object. 58 */ 59static struct gl_framebuffer * 60intel_new_framebuffer(struct gl_context * ctx, GLuint name) 61{ 62 /* Only drawable state in intel_framebuffer at this time, just use Mesa's 63 * class 64 */ 65 return _mesa_new_framebuffer(ctx, name); 66} 67 68 69/** Called by gl_renderbuffer::Delete() */ 70static void 71intel_delete_renderbuffer(struct gl_renderbuffer *rb) 72{ 73 struct intel_renderbuffer *irb = intel_renderbuffer(rb); 74 75 ASSERT(irb); 76 77 intel_region_release(&irb->region); 78 intel_region_release(&irb->hiz_region); 79 80 _mesa_reference_renderbuffer(&irb->wrapped_depth, NULL); 81 _mesa_reference_renderbuffer(&irb->wrapped_stencil, NULL); 82 83 free(irb); 84} 85 86 87/** 88 * Return a pointer to a specific pixel in a renderbuffer. 89 */ 90static void * 91intel_get_pointer(struct gl_context * ctx, struct gl_renderbuffer *rb, 92 GLint x, GLint y) 93{ 94 /* By returning NULL we force all software rendering to go through 95 * the span routines. 96 */ 97 return NULL; 98} 99 100 101/** 102 * Called via glRenderbufferStorageEXT() to set the format and allocate 103 * storage for a user-created renderbuffer. 104 */ 105GLboolean 106intel_alloc_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb, 107 GLenum internalFormat, 108 GLuint width, GLuint height) 109{ 110 struct intel_context *intel = intel_context(ctx); 111 struct intel_renderbuffer *irb = intel_renderbuffer(rb); 112 int cpp, tiling; 113 114 ASSERT(rb->Name != 0); 115 116 switch (internalFormat) { 117 default: 118 /* Use the same format-choice logic as for textures. 119 * Renderbuffers aren't any different from textures for us, 120 * except they're less useful because you can't texture with 121 * them. 122 */ 123 rb->Format = intel->ctx.Driver.ChooseTextureFormat(ctx, internalFormat, 124 GL_NONE, GL_NONE); 125 break; 126 case GL_STENCIL_INDEX: 127 case GL_STENCIL_INDEX1_EXT: 128 case GL_STENCIL_INDEX4_EXT: 129 case GL_STENCIL_INDEX8_EXT: 130 case GL_STENCIL_INDEX16_EXT: 131 /* These aren't actual texture formats, so force them here. */ 132 if (intel->has_separate_stencil) { 133 rb->Format = MESA_FORMAT_S8; 134 } else { 135 assert(!intel->must_use_separate_stencil); 136 rb->Format = MESA_FORMAT_S8_Z24; 137 } 138 break; 139 } 140 141 rb->Width = width; 142 rb->Height = height; 143 rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); 144 rb->DataType = intel_mesa_format_to_rb_datatype(rb->Format); 145 cpp = _mesa_get_format_bytes(rb->Format); 146 147 intel_flush(ctx); 148 149 /* free old region */ 150 if (irb->region) { 151 intel_region_release(&irb->region); 152 } 153 if (irb->hiz_region) { 154 intel_region_release(&irb->hiz_region); 155 } 156 157 /* allocate new memory region/renderbuffer */ 158 159 /* alloc hardware renderbuffer */ 160 DBG("Allocating %d x %d Intel RBO\n", width, height); 161 162 tiling = I915_TILING_NONE; 163 if (intel->use_texture_tiling) { 164 GLenum base_format = _mesa_get_format_base_format(rb->Format); 165 166 if (intel->gen >= 4 && (base_format == GL_DEPTH_COMPONENT || 167 base_format == GL_STENCIL_INDEX || 168 base_format == GL_DEPTH_STENCIL)) 169 tiling = I915_TILING_Y; 170 else 171 tiling = I915_TILING_X; 172 } 173 174 if (irb->Base.Format == MESA_FORMAT_S8) { 175 /* 176 * The stencil buffer is W tiled. However, we request from the kernel a 177 * non-tiled buffer because the GTT is incapable of W fencing. 178 * 179 * The stencil buffer has quirky pitch requirements. From Vol 2a, 180 * 11.5.6.2.1 3DSTATE_STENCIL_BUFFER, field "Surface Pitch": 181 * The pitch must be set to 2x the value computed based on width, as 182 * the stencil buffer is stored with two rows interleaved. 183 * To accomplish this, we resort to the nasty hack of doubling the drm 184 * region's cpp and halving its height. 185 * 186 * If we neglect to double the pitch, then render corruption occurs. 187 */ 188 irb->region = intel_region_alloc(intel->intelScreen, 189 I915_TILING_NONE, 190 cpp * 2, 191 ALIGN(width, 64), 192 ALIGN((height + 1) / 2, 64), 193 true); 194 if (!irb->region) 195 return false; 196 197 } else if (irb->Base.Format == MESA_FORMAT_S8_Z24 198 && intel->must_use_separate_stencil) { 199 200 bool ok = true; 201 struct gl_renderbuffer *depth_rb; 202 struct gl_renderbuffer *stencil_rb; 203 204 depth_rb = intel_create_wrapped_renderbuffer(ctx, width, height, 205 MESA_FORMAT_X8_Z24); 206 stencil_rb = intel_create_wrapped_renderbuffer(ctx, width, height, 207 MESA_FORMAT_S8); 208 ok = depth_rb && stencil_rb; 209 ok = ok && intel_alloc_renderbuffer_storage(ctx, depth_rb, 210 depth_rb->InternalFormat, 211 width, height); 212 ok = ok && intel_alloc_renderbuffer_storage(ctx, stencil_rb, 213 stencil_rb->InternalFormat, 214 width, height); 215 216 if (!ok) { 217 if (depth_rb) { 218 intel_delete_renderbuffer(depth_rb); 219 } 220 if (stencil_rb) { 221 intel_delete_renderbuffer(stencil_rb); 222 } 223 return false; 224 } 225 226 depth_rb->Wrapped = rb; 227 stencil_rb->Wrapped = rb; 228 _mesa_reference_renderbuffer(&irb->wrapped_depth, depth_rb); 229 _mesa_reference_renderbuffer(&irb->wrapped_stencil, stencil_rb); 230 231 } else { 232 irb->region = intel_region_alloc(intel->intelScreen, tiling, cpp, 233 width, height, true); 234 if (!irb->region) 235 return false; 236 237 if (intel->vtbl.is_hiz_depth_format(intel, rb->Format)) { 238 irb->hiz_region = intel_region_alloc(intel->intelScreen, 239 I915_TILING_Y, 240 irb->region->cpp, 241 irb->region->width, 242 irb->region->height, 243 true); 244 if (!irb->hiz_region) { 245 intel_region_release(&irb->region); 246 return false; 247 } 248 } 249 } 250 251 return true; 252} 253 254 255#if FEATURE_OES_EGL_image 256static void 257intel_image_target_renderbuffer_storage(struct gl_context *ctx, 258 struct gl_renderbuffer *rb, 259 void *image_handle) 260{ 261 struct intel_context *intel = intel_context(ctx); 262 struct intel_renderbuffer *irb; 263 __DRIscreen *screen; 264 __DRIimage *image; 265 266 screen = intel->intelScreen->driScrnPriv; 267 image = screen->dri2.image->lookupEGLImage(screen, image_handle, 268 screen->loaderPrivate); 269 if (image == NULL) 270 return; 271 272 /* __DRIimage is opaque to the core so it has to be checked here */ 273 switch (image->format) { 274 case MESA_FORMAT_RGBA8888_REV: 275 _mesa_error(&intel->ctx, GL_INVALID_OPERATION, 276 "glEGLImageTargetRenderbufferStorage(unsupported image format"); 277 return; 278 break; 279 default: 280 break; 281 } 282 283 irb = intel_renderbuffer(rb); 284 intel_region_reference(&irb->region, image->region); 285 286 rb->InternalFormat = image->internal_format; 287 rb->Width = image->region->width; 288 rb->Height = image->region->height; 289 rb->Format = image->format; 290 rb->DataType = image->data_type; 291 rb->_BaseFormat = _mesa_base_fbo_format(&intel->ctx, 292 image->internal_format); 293} 294#endif 295 296/** 297 * Called for each hardware renderbuffer when a _window_ is resized. 298 * Just update fields. 299 * Not used for user-created renderbuffers! 300 */ 301static GLboolean 302intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb, 303 GLenum internalFormat, GLuint width, GLuint height) 304{ 305 ASSERT(rb->Name == 0); 306 rb->Width = width; 307 rb->Height = height; 308 rb->InternalFormat = internalFormat; 309 310 return true; 311} 312 313 314static void 315intel_resize_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, 316 GLuint width, GLuint height) 317{ 318 int i; 319 320 _mesa_resize_framebuffer(ctx, fb, width, height); 321 322 fb->Initialized = true; /* XXX remove someday */ 323 324 if (fb->Name != 0) { 325 return; 326 } 327 328 329 /* Make sure all window system renderbuffers are up to date */ 330 for (i = BUFFER_FRONT_LEFT; i <= BUFFER_BACK_RIGHT; i++) { 331 struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer; 332 333 /* only resize if size is changing */ 334 if (rb && (rb->Width != width || rb->Height != height)) { 335 rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height); 336 } 337 } 338} 339 340 341/** Dummy function for gl_renderbuffer::AllocStorage() */ 342static GLboolean 343intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb, 344 GLenum internalFormat, GLuint width, GLuint height) 345{ 346 _mesa_problem(ctx, "intel_op_alloc_storage should never be called."); 347 return false; 348} 349 350/** 351 * Create a new intel_renderbuffer which corresponds to an on-screen window, 352 * not a user-created renderbuffer. 353 */ 354struct intel_renderbuffer * 355intel_create_renderbuffer(gl_format format) 356{ 357 GET_CURRENT_CONTEXT(ctx); 358 359 struct intel_renderbuffer *irb; 360 361 irb = CALLOC_STRUCT(intel_renderbuffer); 362 if (!irb) { 363 _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer"); 364 return NULL; 365 } 366 367 _mesa_init_renderbuffer(&irb->Base, 0); 368 irb->Base.ClassID = INTEL_RB_CLASS; 369 irb->Base._BaseFormat = _mesa_get_format_base_format(format); 370 irb->Base.Format = format; 371 irb->Base.InternalFormat = irb->Base._BaseFormat; 372 irb->Base.DataType = intel_mesa_format_to_rb_datatype(format); 373 374 /* intel-specific methods */ 375 irb->Base.Delete = intel_delete_renderbuffer; 376 irb->Base.AllocStorage = intel_alloc_window_storage; 377 irb->Base.GetPointer = intel_get_pointer; 378 379 return irb; 380} 381 382 383struct gl_renderbuffer* 384intel_create_wrapped_renderbuffer(struct gl_context * ctx, 385 int width, int height, 386 gl_format format) 387{ 388 /* 389 * The name here is irrelevant, as long as its nonzero, because the 390 * renderbuffer never gets entered into Mesa's renderbuffer hash table. 391 */ 392 GLuint name = ~0; 393 394 struct intel_renderbuffer *irb = CALLOC_STRUCT(intel_renderbuffer); 395 if (!irb) { 396 _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer"); 397 return NULL; 398 } 399 400 struct gl_renderbuffer *rb = &irb->Base; 401 _mesa_init_renderbuffer(rb, name); 402 rb->ClassID = INTEL_RB_CLASS; 403 rb->_BaseFormat = _mesa_get_format_base_format(format); 404 rb->Format = format; 405 rb->InternalFormat = rb->_BaseFormat; 406 rb->DataType = intel_mesa_format_to_rb_datatype(format); 407 rb->Width = width; 408 rb->Height = height; 409 410 return rb; 411} 412 413 414/** 415 * Create a new renderbuffer object. 416 * Typically called via glBindRenderbufferEXT(). 417 */ 418static struct gl_renderbuffer * 419intel_new_renderbuffer(struct gl_context * ctx, GLuint name) 420{ 421 /*struct intel_context *intel = intel_context(ctx); */ 422 struct intel_renderbuffer *irb; 423 424 irb = CALLOC_STRUCT(intel_renderbuffer); 425 if (!irb) { 426 _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer"); 427 return NULL; 428 } 429 430 _mesa_init_renderbuffer(&irb->Base, name); 431 irb->Base.ClassID = INTEL_RB_CLASS; 432 433 /* intel-specific methods */ 434 irb->Base.Delete = intel_delete_renderbuffer; 435 irb->Base.AllocStorage = intel_alloc_renderbuffer_storage; 436 irb->Base.GetPointer = intel_get_pointer; 437 /* span routines set in alloc_storage function */ 438 439 return &irb->Base; 440} 441 442 443/** 444 * Called via glBindFramebufferEXT(). 445 */ 446static void 447intel_bind_framebuffer(struct gl_context * ctx, GLenum target, 448 struct gl_framebuffer *fb, struct gl_framebuffer *fbread) 449{ 450 if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) { 451 intel_draw_buffer(ctx); 452 } 453 else { 454 /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */ 455 } 456} 457 458 459/** 460 * Called via glFramebufferRenderbufferEXT(). 461 */ 462static void 463intel_framebuffer_renderbuffer(struct gl_context * ctx, 464 struct gl_framebuffer *fb, 465 GLenum attachment, struct gl_renderbuffer *rb) 466{ 467 DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0); 468 469 intel_flush(ctx); 470 471 _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb); 472 intel_draw_buffer(ctx); 473} 474 475static bool 476intel_update_tex_wrapper_regions(struct intel_context *intel, 477 struct intel_renderbuffer *irb, 478 struct intel_texture_image *intel_image); 479 480static bool 481intel_update_wrapper(struct gl_context *ctx, struct intel_renderbuffer *irb, 482 struct gl_texture_image *texImage) 483{ 484 struct intel_context *intel = intel_context(ctx); 485 struct intel_texture_image *intel_image = intel_texture_image(texImage); 486 int width, height, depth; 487 488 if (!intel_span_supports_format(texImage->TexFormat)) { 489 DBG("Render to texture BAD FORMAT %s\n", 490 _mesa_get_format_name(texImage->TexFormat)); 491 return false; 492 } else { 493 DBG("Render to texture %s\n", _mesa_get_format_name(texImage->TexFormat)); 494 } 495 496 intel_miptree_get_dimensions_for_image(texImage, &width, &height, &depth); 497 498 irb->Base.Format = texImage->TexFormat; 499 irb->Base.DataType = intel_mesa_format_to_rb_datatype(texImage->TexFormat); 500 irb->Base.InternalFormat = texImage->InternalFormat; 501 irb->Base._BaseFormat = _mesa_base_tex_format(ctx, irb->Base.InternalFormat); 502 irb->Base.Width = width; 503 irb->Base.Height = height; 504 505 irb->Base.Delete = intel_delete_renderbuffer; 506 irb->Base.AllocStorage = intel_nop_alloc_storage; 507 508 if (intel_image->stencil_rb) { 509 /* The tex image has packed depth/stencil format, but is using separate 510 * stencil. */ 511 512 bool ok; 513 struct intel_renderbuffer *depth_irb = 514 intel_renderbuffer(intel_image->depth_rb); 515 516 /* Update the hiz region if necessary. */ 517 ok = intel_update_tex_wrapper_regions(intel, depth_irb, intel_image); 518 if (!ok) { 519 return false; 520 } 521 522 /* The tex image shares its embedded depth and stencil renderbuffers with 523 * the renderbuffer wrapper. */ 524 _mesa_reference_renderbuffer(&irb->wrapped_depth, 525 intel_image->depth_rb); 526 _mesa_reference_renderbuffer(&irb->wrapped_stencil, 527 intel_image->stencil_rb); 528 529 return true; 530 } else { 531 return intel_update_tex_wrapper_regions(intel, irb, intel_image); 532 } 533} 534 535/** 536 * FIXME: The handling of the hiz region is broken for mipmapped depth textures 537 * FIXME: because intel_finalize_mipmap_tree is unaware of it. 538 */ 539static bool 540intel_update_tex_wrapper_regions(struct intel_context *intel, 541 struct intel_renderbuffer *irb, 542 struct intel_texture_image *intel_image) 543{ 544 struct gl_renderbuffer *rb = &irb->Base; 545 546 /* Point the renderbuffer's region to the texture's region. */ 547 if (irb->region != intel_image->mt->region) { 548 intel_region_reference(&irb->region, intel_image->mt->region); 549 } 550 551 /* Allocate the texture's hiz region if necessary. */ 552 if (intel->vtbl.is_hiz_depth_format(intel, rb->Format) 553 && !intel_image->mt->hiz_region) { 554 intel_image->mt->hiz_region = 555 intel_region_alloc(intel->intelScreen, 556 I915_TILING_Y, 557 _mesa_get_format_bytes(rb->Format), 558 rb->Width, 559 rb->Height, 560 true); 561 if (!intel_image->mt->hiz_region) 562 return false; 563 } 564 565 /* Point the renderbuffer's hiz region to the texture's hiz region. */ 566 if (irb->hiz_region != intel_image->mt->hiz_region) { 567 intel_region_reference(&irb->hiz_region, intel_image->mt->hiz_region); 568 } 569 570 return true; 571} 572 573 574/** 575 * When glFramebufferTexture[123]D is called this function sets up the 576 * gl_renderbuffer wrapper around the texture image. 577 * This will have the region info needed for hardware rendering. 578 */ 579static struct intel_renderbuffer * 580intel_wrap_texture(struct gl_context * ctx, struct gl_texture_image *texImage) 581{ 582 const GLuint name = ~0; /* not significant, but distinct for debugging */ 583 struct intel_renderbuffer *irb; 584 585 /* make an intel_renderbuffer to wrap the texture image */ 586 irb = CALLOC_STRUCT(intel_renderbuffer); 587 if (!irb) { 588 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture"); 589 return NULL; 590 } 591 592 _mesa_init_renderbuffer(&irb->Base, name); 593 irb->Base.ClassID = INTEL_RB_CLASS; 594 595 if (!intel_update_wrapper(ctx, irb, texImage)) { 596 free(irb); 597 return NULL; 598 } 599 600 return irb; 601} 602 603void 604intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb, 605 struct intel_texture_image *intel_image, 606 int zoffset) 607{ 608 unsigned int dst_x, dst_y; 609 610 /* compute offset of the particular 2D image within the texture region */ 611 intel_miptree_get_image_offset(intel_image->mt, 612 intel_image->base.Base.Level, 613 intel_image->base.Base.Face, 614 zoffset, 615 &dst_x, &dst_y); 616 617 irb->draw_x = dst_x; 618 irb->draw_y = dst_y; 619} 620 621/** 622 * Rendering to tiled buffers requires that the base address of the 623 * buffer be aligned to a page boundary. We generally render to 624 * textures by pointing the surface at the mipmap image level, which 625 * may not be aligned to a tile boundary. 626 * 627 * This function returns an appropriately-aligned base offset 628 * according to the tiling restrictions, plus any required x/y offset 629 * from there. 630 */ 631uint32_t 632intel_renderbuffer_tile_offsets(struct intel_renderbuffer *irb, 633 uint32_t *tile_x, 634 uint32_t *tile_y) 635{ 636 int cpp = irb->region->cpp; 637 uint32_t pitch = irb->region->pitch * cpp; 638 639 if (irb->region->tiling == I915_TILING_NONE) { 640 *tile_x = 0; 641 *tile_y = 0; 642 return irb->draw_x * cpp + irb->draw_y * pitch; 643 } else if (irb->region->tiling == I915_TILING_X) { 644 *tile_x = irb->draw_x % (512 / cpp); 645 *tile_y = irb->draw_y % 8; 646 return ((irb->draw_y / 8) * (8 * pitch) + 647 (irb->draw_x - *tile_x) / (512 / cpp) * 4096); 648 } else { 649 assert(irb->region->tiling == I915_TILING_Y); 650 *tile_x = irb->draw_x % (128 / cpp); 651 *tile_y = irb->draw_y % 32; 652 return ((irb->draw_y / 32) * (32 * pitch) + 653 (irb->draw_x - *tile_x) / (128 / cpp) * 4096); 654 } 655} 656 657#ifndef I915 658static bool 659need_tile_offset_workaround(struct brw_context *brw, 660 struct intel_renderbuffer *irb) 661{ 662 uint32_t tile_x, tile_y; 663 664 if (brw->has_surface_tile_offset) 665 return false; 666 667 intel_renderbuffer_tile_offsets(irb, &tile_x, &tile_y); 668 669 return tile_x != 0 || tile_y != 0; 670} 671#endif 672 673/** 674 * Called by glFramebufferTexture[123]DEXT() (and other places) to 675 * prepare for rendering into texture memory. This might be called 676 * many times to choose different texture levels, cube faces, etc 677 * before intel_finish_render_texture() is ever called. 678 */ 679static void 680intel_render_texture(struct gl_context * ctx, 681 struct gl_framebuffer *fb, 682 struct gl_renderbuffer_attachment *att) 683{ 684 struct gl_texture_image *image = _mesa_get_attachment_teximage(att); 685 struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer); 686 struct intel_texture_image *intel_image = intel_texture_image(image); 687 688 (void) fb; 689 690 if (!intel_image->mt) { 691 /* Fallback on drawing to a texture that doesn't have a miptree 692 * (has a border, width/height 0, etc.) 693 */ 694 _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); 695 _swrast_render_texture(ctx, fb, att); 696 return; 697 } 698 else if (!irb) { 699 irb = intel_wrap_texture(ctx, image); 700 if (irb) { 701 /* bind the wrapper to the attachment point */ 702 _mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base); 703 } 704 else { 705 /* fallback to software rendering */ 706 _swrast_render_texture(ctx, fb, att); 707 return; 708 } 709 } 710 711 if (!intel_update_wrapper(ctx, irb, image)) { 712 _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); 713 _swrast_render_texture(ctx, fb, att); 714 return; 715 } 716 717 DBG("Begin render texture tid %lx tex=%u w=%d h=%d refcount=%d\n", 718 _glthread_GetID(), 719 att->Texture->Name, image->Width, image->Height, 720 irb->Base.RefCount); 721 722 intel_renderbuffer_set_draw_offset(irb, intel_image, att->Zoffset); 723 intel_image->used_as_render_target = true; 724 725#ifndef I915 726 if (need_tile_offset_workaround(brw_context(ctx), irb)) { 727 /* Original gen4 hardware couldn't draw to a non-tile-aligned 728 * destination in a miptree unless you actually setup your 729 * renderbuffer as a miptree and used the fragile 730 * lod/array_index/etc. controls to select the image. So, 731 * instead, we just make a new single-level miptree and render 732 * into that. 733 */ 734 struct intel_context *intel = intel_context(ctx); 735 struct intel_mipmap_tree *new_mt; 736 int width, height, depth; 737 738 intel_miptree_get_dimensions_for_image(image, &width, &height, &depth); 739 740 new_mt = intel_miptree_create(intel, image->TexObject->Target, 741 intel_image->base.Base.TexFormat, 742 intel_image->base.Base.Level, 743 intel_image->base.Base.Level, 744 width, height, depth, 745 true); 746 747 intel_miptree_copy_teximage(intel, intel_image, new_mt); 748 intel_renderbuffer_set_draw_offset(irb, intel_image, att->Zoffset); 749 750 intel_region_reference(&irb->region, intel_image->mt->region); 751 intel_miptree_release(&new_mt); 752 } 753#endif 754 /* update drawing region, etc */ 755 intel_draw_buffer(ctx); 756} 757 758 759/** 760 * Called by Mesa when rendering to a texture is done. 761 */ 762static void 763intel_finish_render_texture(struct gl_context * ctx, 764 struct gl_renderbuffer_attachment *att) 765{ 766 struct intel_context *intel = intel_context(ctx); 767 struct gl_texture_object *tex_obj = att->Texture; 768 struct gl_texture_image *image = 769 tex_obj->Image[att->CubeMapFace][att->TextureLevel]; 770 struct intel_texture_image *intel_image = intel_texture_image(image); 771 772 DBG("Finish render texture tid %lx tex=%u\n", 773 _glthread_GetID(), att->Texture->Name); 774 775 /* Flag that this image may now be validated into the object's miptree. */ 776 if (intel_image) 777 intel_image->used_as_render_target = false; 778 779 /* Since we've (probably) rendered to the texture and will (likely) use 780 * it in the texture domain later on in this batchbuffer, flush the 781 * batch. Once again, we wish for a domain tracker in libdrm to cover 782 * usage inside of a batchbuffer like GEM does in the kernel. 783 */ 784 intel_batchbuffer_emit_mi_flush(intel); 785} 786 787/** 788 * Do additional "completeness" testing of a framebuffer object. 789 */ 790static void 791intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb) 792{ 793 struct intel_context *intel = intel_context(ctx); 794 const struct intel_renderbuffer *depthRb = 795 intel_get_renderbuffer(fb, BUFFER_DEPTH); 796 const struct intel_renderbuffer *stencilRb = 797 intel_get_renderbuffer(fb, BUFFER_STENCIL); 798 int i; 799 800 /* 801 * The depth and stencil renderbuffers are the same renderbuffer or wrap 802 * the same texture. 803 */ 804 if (depthRb && stencilRb) { 805 bool depth_stencil_are_same; 806 if (depthRb == stencilRb) 807 depth_stencil_are_same = true; 808 else if ((fb->Attachment[BUFFER_DEPTH].Type == GL_TEXTURE) && 809 (fb->Attachment[BUFFER_STENCIL].Type == GL_TEXTURE) && 810 (fb->Attachment[BUFFER_DEPTH].Texture->Name == 811 fb->Attachment[BUFFER_STENCIL].Texture->Name)) 812 depth_stencil_are_same = true; 813 else 814 depth_stencil_are_same = false; 815 816 if (!intel->has_separate_stencil && !depth_stencil_are_same) { 817 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 818 } 819 } 820 821 for (i = 0; i < Elements(fb->Attachment); i++) { 822 struct gl_renderbuffer *rb; 823 struct intel_renderbuffer *irb; 824 825 if (fb->Attachment[i].Type == GL_NONE) 826 continue; 827 828 /* A supported attachment will have a Renderbuffer set either 829 * from being a Renderbuffer or being a texture that got the 830 * intel_wrap_texture() treatment. 831 */ 832 rb = fb->Attachment[i].Renderbuffer; 833 if (rb == NULL) { 834 DBG("attachment without renderbuffer\n"); 835 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 836 continue; 837 } 838 839 irb = intel_renderbuffer(rb); 840 if (irb == NULL) { 841 DBG("software rendering renderbuffer\n"); 842 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 843 continue; 844 } 845 846 if (!intel_span_supports_format(irb->Base.Format) || 847 !intel->vtbl.render_target_supported(irb->Base.Format)) { 848 DBG("Unsupported texture/renderbuffer format attached: %s\n", 849 _mesa_get_format_name(irb->Base.Format)); 850 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; 851 } 852 } 853} 854 855/** 856 * Try to do a glBlitFramebuffer using glCopyTexSubImage2D 857 * We can do this when the dst renderbuffer is actually a texture and 858 * there is no scaling, mirroring or scissoring. 859 * 860 * \return new buffer mask indicating the buffers left to blit using the 861 * normal path. 862 */ 863static GLbitfield 864intel_blit_framebuffer_copy_tex_sub_image(struct gl_context *ctx, 865 GLint srcX0, GLint srcY0, 866 GLint srcX1, GLint srcY1, 867 GLint dstX0, GLint dstY0, 868 GLint dstX1, GLint dstY1, 869 GLbitfield mask, GLenum filter) 870{ 871 if (mask & GL_COLOR_BUFFER_BIT) { 872 const struct gl_framebuffer *drawFb = ctx->DrawBuffer; 873 const struct gl_framebuffer *readFb = ctx->ReadBuffer; 874 const struct gl_renderbuffer_attachment *drawAtt = 875 &drawFb->Attachment[drawFb->_ColorDrawBufferIndexes[0]]; 876 877 /* If the source and destination are the same size with no 878 mirroring, the rectangles are within the size of the 879 texture and there is no scissor then we can use 880 glCopyTexSubimage2D to implement the blit. This will end 881 up as a fast hardware blit on some drivers */ 882 if (drawAtt && drawAtt->Texture && 883 srcX0 - srcX1 == dstX0 - dstX1 && 884 srcY0 - srcY1 == dstY0 - dstY1 && 885 srcX1 >= srcX0 && 886 srcY1 >= srcY0 && 887 srcX0 >= 0 && srcX1 <= readFb->Width && 888 srcY0 >= 0 && srcY1 <= readFb->Height && 889 dstX0 >= 0 && dstX1 <= drawFb->Width && 890 dstY0 >= 0 && dstY1 <= drawFb->Height && 891 !ctx->Scissor.Enabled) { 892 const struct gl_texture_object *texObj = drawAtt->Texture; 893 const GLuint dstLevel = drawAtt->TextureLevel; 894 const GLenum target = texObj->Target; 895 896 struct gl_texture_image *texImage = 897 _mesa_select_tex_image(ctx, texObj, target, dstLevel); 898 899 if (intel_copy_texsubimage(intel_context(ctx), 900 intel_texture_image(texImage), 901 dstX0, dstY0, 902 srcX0, srcY0, 903 srcX1 - srcX0, /* width */ 904 srcY1 - srcY0)) 905 mask &= ~GL_COLOR_BUFFER_BIT; 906 } 907 } 908 909 return mask; 910} 911 912static void 913intel_blit_framebuffer(struct gl_context *ctx, 914 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, 915 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, 916 GLbitfield mask, GLenum filter) 917{ 918 /* Try faster, glCopyTexSubImage2D approach first which uses the BLT. */ 919 mask = intel_blit_framebuffer_copy_tex_sub_image(ctx, 920 srcX0, srcY0, srcX1, srcY1, 921 dstX0, dstY0, dstX1, dstY1, 922 mask, filter); 923 if (mask == 0x0) 924 return; 925 926 _mesa_meta_BlitFramebuffer(ctx, 927 srcX0, srcY0, srcX1, srcY1, 928 dstX0, dstY0, dstX1, dstY1, 929 mask, filter); 930} 931 932/** 933 * Do one-time context initializations related to GL_EXT_framebuffer_object. 934 * Hook in device driver functions. 935 */ 936void 937intel_fbo_init(struct intel_context *intel) 938{ 939 intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer; 940 intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer; 941 intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer; 942 intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer; 943 intel->ctx.Driver.RenderTexture = intel_render_texture; 944 intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture; 945 intel->ctx.Driver.ResizeBuffers = intel_resize_buffers; 946 intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer; 947 intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer; 948 949#if FEATURE_OES_EGL_image 950 intel->ctx.Driver.EGLImageTargetRenderbufferStorage = 951 intel_image_target_renderbuffer_storage; 952#endif 953} 954