src/mesa/drivers/dri/i965/intel_fbo.c

   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/enums.h"
  30 #include "main/imports.h"
  31 #include "main/macros.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 "main/image.h"
  39
  40 #include "swrast/swrast.h"
  41 #include "drivers/common/meta.h"
  42
  43 #include "intel_batchbuffer.h"
  44 #include "intel_buffers.h"
  45 #include "intel_blit.h"
  46 #include "intel_fbo.h"
  47 #include "intel_mipmap_tree.h"
  48 #include "intel_regions.h"
  49 #include "intel_tex.h"
  50 #include "brw_context.h"
  51
  52 #define FILE_DEBUG_FLAG DEBUG_FBO
  53
  54 /**
  55  * Create a new framebuffer object.
  56  */
  57 static struct gl_framebuffer *
  58 intel_new_framebuffer(struct gl_context * ctx, GLuint name)
  59 {
  60    /* Only drawable state in intel_framebuffer at this time, just use Mesa's
  61     * class
  62     */
  63    return _mesa_new_framebuffer(ctx, name);
  64 }
  65
  66
  67 /** Called by gl_renderbuffer::Delete() */
  68 static void
  69 intel_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
  70 {
  71    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  72
  73    ASSERT(irb);
  74
  75    intel_miptree_release(&irb->mt);
  76
  77    _mesa_delete_renderbuffer(ctx, rb);
  78 }
  79
  80 /**
  81  * \see dd_function_table::MapRenderbuffer
  82  */
  83 static void
  84 intel_map_renderbuffer(struct gl_context *ctx,
  85                        struct gl_renderbuffer *rb,
  86                        GLuint x, GLuint y, GLuint w, GLuint h,
  87                        GLbitfield mode,
  88                        GLubyte **out_map,
  89                        GLint *out_stride)
  90 {
  91    struct brw_context *brw = brw_context(ctx);
  92    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
  93    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  94    void *map;
  95    int stride;
  96
  97    if (srb->Buffer) {
  98       /* this is a malloc'd renderbuffer (accum buffer), not an irb */
  99       GLint bpp = _mesa_get_format_bytes(rb->Format);
 100       GLint rowStride = srb->RowStride;
 101       *out_map = (GLubyte *) srb->Buffer + y * rowStride + x * bpp;
 102       *out_stride = rowStride;
 103       return;
 104    }
 105
 106    intel_prepare_render(brw);
 107
 108    /* For a window-system renderbuffer, we need to flip the mapping we receive
 109     * upside-down.  So we need to ask for a rectangle on flipped vertically, and
 110     * we then return a pointer to the bottom of it with a negative stride.
 111     */
 112    if (rb->Name == 0) {
 113       y = rb->Height - y - h;
 114    }
 115
 116    intel_miptree_map(brw, irb->mt, irb->mt_level, irb->mt_layer,
 117                      x, y, w, h, mode, &map, &stride);
 118
 119    if (rb->Name == 0) {
 120       map += (h - 1) * stride;
 121       stride = -stride;
 122    }
 123
 124    DBG("%s: rb %d (%s) mt mapped: (%d, %d) (%dx%d) -> %p/%d\n",
 125        __FUNCTION__, rb->Name, _mesa_get_format_name(rb->Format),
 126        x, y, w, h, map, stride);
 127
 128    *out_map = map;
 129    *out_stride = stride;
 130 }
 131
 132 /**
 133  * \see dd_function_table::UnmapRenderbuffer
 134  */
 135 static void
 136 intel_unmap_renderbuffer(struct gl_context *ctx,
 137                          struct gl_renderbuffer *rb)
 138 {
 139    struct brw_context *brw = brw_context(ctx);
 140    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
 141    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 142
 143    DBG("%s: rb %d (%s)\n", __FUNCTION__,
 144        rb->Name, _mesa_get_format_name(rb->Format));
 145
 146    if (srb->Buffer) {
 147       /* this is a malloc'd renderbuffer (accum buffer) */
 148       /* nothing to do */
 149       return;
 150    }
 151
 152    intel_miptree_unmap(brw, irb->mt, irb->mt_level, irb->mt_layer);
 153 }
 154
 155
 156 /**
 157  * Round up the requested multisample count to the next supported sample size.
 158  */
 159 unsigned
 160 intel_quantize_num_samples(struct intel_screen *intel, unsigned num_samples)
 161 {
 162    switch (intel->gen) {
 163    case 6:
 164       /* Gen6 supports only 4x multisampling. */
 165       if (num_samples > 0)
 166          return 4;
 167       else
 168          return 0;
 169    case 7:
 170       /* Gen7 supports 4x and 8x multisampling. */
 171       if (num_samples > 4)
 172          return 8;
 173       else if (num_samples > 0)
 174          return 4;
 175       else
 176          return 0;
 177       return 0;
 178    default:
 179       /* MSAA unsupported. */
 180       return 0;
 181    }
 182 }
 183
 184
 185 /**
 186  * Called via glRenderbufferStorageEXT() to set the format and allocate
 187  * storage for a user-created renderbuffer.
 188  */
 189 static GLboolean
 190 intel_alloc_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 191                                  GLenum internalFormat,
 192                                  GLuint width, GLuint height)
 193 {
 194    struct brw_context *brw = brw_context(ctx);
 195    struct intel_context *intel = intel_context(ctx);
 196    struct intel_screen *screen = intel->intelScreen;
 197    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 198    rb->NumSamples = intel_quantize_num_samples(screen, rb->NumSamples);
 199
 200    switch (internalFormat) {
 201    default:
 202       /* Use the same format-choice logic as for textures.
 203        * Renderbuffers aren't any different from textures for us,
 204        * except they're less useful because you can't texture with
 205        * them.
 206        */
 207       rb->Format = intel->ctx.Driver.ChooseTextureFormat(ctx, GL_TEXTURE_2D,
 208                                                          internalFormat,
 209                                                          GL_NONE, GL_NONE);
 210       break;
 211    case GL_STENCIL_INDEX:
 212    case GL_STENCIL_INDEX1_EXT:
 213    case GL_STENCIL_INDEX4_EXT:
 214    case GL_STENCIL_INDEX8_EXT:
 215    case GL_STENCIL_INDEX16_EXT:
 216       /* These aren't actual texture formats, so force them here. */
 217       if (intel->has_separate_stencil) {
 218          rb->Format = MESA_FORMAT_S8;
 219       } else {
 220          assert(!intel->must_use_separate_stencil);
 221          rb->Format = MESA_FORMAT_S8_Z24;
 222       }
 223       break;
 224    }
 225
 226    rb->Width = width;
 227    rb->Height = height;
 228    rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 229
 230    intel_miptree_release(&irb->mt);
 231
 232    DBG("%s: %s: %s (%dx%d)\n", __FUNCTION__,
 233        _mesa_lookup_enum_by_nr(internalFormat),
 234        _mesa_get_format_name(rb->Format), width, height);
 235
 236    if (width == 0 || height == 0)
 237       return true;
 238
 239    irb->mt = intel_miptree_create_for_renderbuffer(brw, rb->Format,
 240                                                    width, height,
 241                                                    rb->NumSamples);
 242    if (!irb->mt)
 243       return false;
 244
 245    return true;
 246 }
 247
 248
 249 static void
 250 intel_image_target_renderbuffer_storage(struct gl_context *ctx,
 251                                         struct gl_renderbuffer *rb,
 252                                         void *image_handle)
 253 {
 254    struct brw_context *brw = brw_context(ctx);
 255    struct intel_context *intel = intel_context(ctx);
 256    struct intel_renderbuffer *irb;
 257    __DRIscreen *screen;
 258    __DRIimage *image;
 259
 260    screen = intel->intelScreen->driScrnPriv;
 261    image = screen->dri2.image->lookupEGLImage(screen, image_handle,
 262                                               screen->loaderPrivate);
 263    if (image == NULL)
 264       return;
 265
 266    /* __DRIimage is opaque to the core so it has to be checked here */
 267    switch (image->format) {
 268    case MESA_FORMAT_RGBA8888_REV:
 269       _mesa_error(ctx, GL_INVALID_OPERATION,
 270             "glEGLImageTargetRenderbufferStorage(unsupported image format");
 271       return;
 272       break;
 273    default:
 274       break;
 275    }
 276
 277    irb = intel_renderbuffer(rb);
 278    intel_miptree_release(&irb->mt);
 279    irb->mt = intel_miptree_create_for_bo(brw,
 280                                          image->region->bo,
 281                                          image->format,
 282                                          image->offset,
 283                                          image->region->width,
 284                                          image->region->height,
 285                                          image->region->pitch,
 286                                          image->region->tiling);
 287    if (!irb->mt)
 288       return;
 289
 290    rb->InternalFormat = image->internal_format;
 291    rb->Width = image->region->width;
 292    rb->Height = image->region->height;
 293    rb->Format = image->format;
 294    rb->_BaseFormat = _mesa_base_fbo_format(ctx, image->internal_format);
 295    rb->NeedsFinishRenderTexture = true;
 296 }
 297
 298 /**
 299  * Called by _mesa_resize_framebuffer() for each hardware renderbuffer when a
 300  * window system framebuffer is resized.
 301  *
 302  * Any actual buffer reallocations for hardware renderbuffers (which would
 303  * have triggered _mesa_resize_framebuffer()) were done by
 304  * intel_process_dri2_buffer().
 305  */
 306 static GLboolean
 307 intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 308                            GLenum internalFormat, GLuint width, GLuint height)
 309 {
 310    ASSERT(rb->Name == 0);
 311    rb->Width = width;
 312    rb->Height = height;
 313    rb->InternalFormat = internalFormat;
 314
 315    return true;
 316 }
 317
 318 /** Dummy function for gl_renderbuffer::AllocStorage() */
 319 static GLboolean
 320 intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 321                         GLenum internalFormat, GLuint width, GLuint height)
 322 {
 323    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 324    return false;
 325 }
 326
 327 /**
 328  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 329  * not a user-created renderbuffer.
 330  *
 331  * \param num_samples must be quantized.
 332  */
 333 struct intel_renderbuffer *
 334 intel_create_renderbuffer(gl_format format, unsigned num_samples)
 335 {
 336    struct intel_renderbuffer *irb;
 337    struct gl_renderbuffer *rb;
 338
 339    GET_CURRENT_CONTEXT(ctx);
 340
 341    irb = CALLOC_STRUCT(intel_renderbuffer);
 342    if (!irb) {
 343       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 344       return NULL;
 345    }
 346
 347    rb = &irb->Base.Base;
 348
 349    _mesa_init_renderbuffer(rb, 0);
 350    rb->ClassID = INTEL_RB_CLASS;
 351    rb->_BaseFormat = _mesa_get_format_base_format(format);
 352    rb->Format = format;
 353    rb->InternalFormat = rb->_BaseFormat;
 354    rb->NumSamples = num_samples;
 355
 356    /* intel-specific methods */
 357    rb->Delete = intel_delete_renderbuffer;
 358    rb->AllocStorage = intel_alloc_window_storage;
 359
 360    return irb;
 361 }
 362
 363 /**
 364  * Private window-system buffers (as opposed to ones shared with the display
 365  * server created with intel_create_renderbuffer()) are most similar in their
 366  * handling to user-created renderbuffers, but they have a resize handler that
 367  * may be called at intel_update_renderbuffers() time.
 368  *
 369  * \param num_samples must be quantized.
 370  */
 371 struct intel_renderbuffer *
 372 intel_create_private_renderbuffer(gl_format format, unsigned num_samples)
 373 {
 374    struct intel_renderbuffer *irb;
 375
 376    irb = intel_create_renderbuffer(format, num_samples);
 377    irb->Base.Base.AllocStorage = intel_alloc_renderbuffer_storage;
 378
 379    return irb;
 380 }
 381
 382 /**
 383  * Create a new renderbuffer object.
 384  * Typically called via glBindRenderbufferEXT().
 385  */
 386 static struct gl_renderbuffer *
 387 intel_new_renderbuffer(struct gl_context * ctx, GLuint name)
 388 {
 389    /*struct intel_context *intel = intel_context(ctx); */
 390    struct intel_renderbuffer *irb;
 391    struct gl_renderbuffer *rb;
 392
 393    irb = CALLOC_STRUCT(intel_renderbuffer);
 394    if (!irb) {
 395       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 396       return NULL;
 397    }
 398
 399    rb = &irb->Base.Base;
 400
 401    _mesa_init_renderbuffer(rb, name);
 402    rb->ClassID = INTEL_RB_CLASS;
 403
 404    /* intel-specific methods */
 405    rb->Delete = intel_delete_renderbuffer;
 406    rb->AllocStorage = intel_alloc_renderbuffer_storage;
 407    /* span routines set in alloc_storage function */
 408
 409    return rb;
 410 }
 411
 412 static bool
 413 intel_renderbuffer_update_wrapper(struct brw_context *brw,
 414                                   struct intel_renderbuffer *irb,
 415                                   struct gl_texture_image *image,
 416                                   uint32_t layer)
 417 {
 418    struct gl_renderbuffer *rb = &irb->Base.Base;
 419    struct intel_texture_image *intel_image = intel_texture_image(image);
 420    struct intel_mipmap_tree *mt = intel_image->mt;
 421    int level = image->Level;
 422
 423    rb->Depth = image->Depth;
 424
 425    rb->AllocStorage = intel_nop_alloc_storage;
 426
 427    intel_miptree_check_level_layer(mt, level, layer);
 428    irb->mt_level = level;
 429
 430    switch (mt->msaa_layout) {
 431       case INTEL_MSAA_LAYOUT_UMS:
 432       case INTEL_MSAA_LAYOUT_CMS:
 433          irb->mt_layer = layer * mt->num_samples;
 434          break;
 435
 436       default:
 437          irb->mt_layer = layer;
 438    }
 439
 440    intel_miptree_reference(&irb->mt, mt);
 441
 442    intel_renderbuffer_set_draw_offset(irb);
 443
 444    if (mt->hiz_mt == NULL && brw_is_hiz_depth_format(brw, rb->Format)) {
 445       intel_miptree_alloc_hiz(brw, mt);
 446       if (!mt->hiz_mt)
 447          return false;
 448    }
 449
 450    return true;
 451 }
 452
 453 void
 454 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb)
 455 {
 456    unsigned int dst_x, dst_y;
 457
 458    /* compute offset of the particular 2D image within the texture region */
 459    intel_miptree_get_image_offset(irb->mt,
 460                                   irb->mt_level,
 461                                   irb->mt_layer,
 462                                   &dst_x, &dst_y);
 463
 464    irb->draw_x = dst_x;
 465    irb->draw_y = dst_y;
 466 }
 467
 468 /**
 469  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 470  * prepare for rendering into texture memory.  This might be called
 471  * many times to choose different texture levels, cube faces, etc
 472  * before intel_finish_render_texture() is ever called.
 473  */
 474 static void
 475 intel_render_texture(struct gl_context * ctx,
 476                      struct gl_framebuffer *fb,
 477                      struct gl_renderbuffer_attachment *att)
 478 {
 479    struct brw_context *brw = brw_context(ctx);
 480    struct gl_renderbuffer *rb = att->Renderbuffer;
 481    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 482    struct gl_texture_image *image = rb->TexImage;
 483    struct intel_texture_image *intel_image = intel_texture_image(image);
 484    struct intel_mipmap_tree *mt = intel_image->mt;
 485    int layer;
 486
 487    (void) fb;
 488
 489    if (att->CubeMapFace > 0) {
 490       assert(att->Zoffset == 0);
 491       layer = att->CubeMapFace;
 492    } else {
 493       layer = att->Zoffset;
 494    }
 495
 496    if (!intel_image->mt) {
 497       /* Fallback on drawing to a texture that doesn't have a miptree
 498        * (has a border, width/height 0, etc.)
 499        */
 500       _swrast_render_texture(ctx, fb, att);
 501       return;
 502    }
 503
 504    intel_miptree_check_level_layer(mt, att->TextureLevel, layer);
 505
 506    if (!intel_renderbuffer_update_wrapper(brw, irb, image, layer)) {
 507        _swrast_render_texture(ctx, fb, att);
 508        return;
 509    }
 510
 511    DBG("Begin render %s texture tex=%u w=%d h=%d d=%d refcount=%d\n",
 512        _mesa_get_format_name(image->TexFormat),
 513        att->Texture->Name, image->Width, image->Height, image->Depth,
 514        rb->RefCount);
 515 }
 516
 517
 518 /**
 519  * Called by Mesa when rendering to a texture is done.
 520  */
 521 static void
 522 intel_finish_render_texture(struct gl_context * ctx, struct gl_renderbuffer *rb)
 523 {
 524    struct brw_context *brw = brw_context(ctx);
 525
 526    DBG("Finish render %s texture\n", _mesa_get_format_name(rb->Format));
 527
 528    /* Since we've (probably) rendered to the texture and will (likely) use
 529     * it in the texture domain later on in this batchbuffer, flush the
 530     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 531     * usage inside of a batchbuffer like GEM does in the kernel.
 532     */
 533    intel_batchbuffer_emit_mi_flush(brw);
 534 }
 535
 536 #define fbo_incomplete(fb, ...) do {                                          \
 537       static GLuint msg_id = 0;                                               \
 538       if (unlikely(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT)) {    \
 539          _mesa_gl_debug(ctx, &msg_id,                                         \
 540                         MESA_DEBUG_TYPE_OTHER,                                \
 541                         MESA_DEBUG_SEVERITY_MEDIUM,                           \
 542                         __VA_ARGS__);                                         \
 543       }                                                                       \
 544       DBG(__VA_ARGS__);                                                       \
 545       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED;                               \
 546    } while (0)
 547
 548 /**
 549  * Do additional "completeness" testing of a framebuffer object.
 550  */
 551 static void
 552 intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 553 {
 554    struct brw_context *brw = brw_context(ctx);
 555    struct intel_context *intel = intel_context(ctx);
 556    struct intel_renderbuffer *depthRb =
 557       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 558    struct intel_renderbuffer *stencilRb =
 559       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 560    struct intel_mipmap_tree *depth_mt = NULL, *stencil_mt = NULL;
 561    int i;
 562
 563    DBG("%s() on fb %p (%s)\n", __FUNCTION__,
 564        fb, (fb == ctx->DrawBuffer ? "drawbuffer" :
 565             (fb == ctx->ReadBuffer ? "readbuffer" : "other buffer")));
 566
 567    if (depthRb)
 568       depth_mt = depthRb->mt;
 569    if (stencilRb) {
 570       stencil_mt = stencilRb->mt;
 571       if (stencil_mt->stencil_mt)
 572          stencil_mt = stencil_mt->stencil_mt;
 573    }
 574
 575    if (depth_mt && stencil_mt) {
 576       if (depth_mt == stencil_mt) {
 577          /* For true packed depth/stencil (not faked on prefers-separate-stencil
 578           * hardware) we need to be sure they're the same level/layer, since
 579           * we'll be emitting a single packet describing the packed setup.
 580           */
 581          if (depthRb->mt_level != stencilRb->mt_level ||
 582              depthRb->mt_layer != stencilRb->mt_layer) {
 583             fbo_incomplete(fb,
 584                            "FBO incomplete: depth image level/layer %d/%d != "
 585                            "stencil image %d/%d\n",
 586                            depthRb->mt_level,
 587                            depthRb->mt_layer,
 588                            stencilRb->mt_level,
 589                            stencilRb->mt_layer);
 590          }
 591       } else {
 592          if (!intel->has_separate_stencil) {
 593             fbo_incomplete(fb, "FBO incomplete: separate stencil "
 594                            "unsupported\n");
 595          }
 596          if (stencil_mt->format != MESA_FORMAT_S8) {
 597             fbo_incomplete(fb, "FBO incomplete: separate stencil is %s "
 598                            "instead of S8\n",
 599                            _mesa_get_format_name(stencil_mt->format));
 600          }
 601          if (intel->gen < 7 && !intel_renderbuffer_has_hiz(depthRb)) {
 602             /* Before Gen7, separate depth and stencil buffers can be used
 603              * only if HiZ is enabled. From the Sandybridge PRM, Volume 2,
 604              * Part 1, Bit 3DSTATE_DEPTH_BUFFER.SeparateStencilBufferEnable:
 605              *     [DevSNB]: This field must be set to the same value (enabled
 606              *     or disabled) as Hierarchical Depth Buffer Enable.
 607              */
 608             fbo_incomplete(fb, "FBO incomplete: separate stencil "
 609                            "without HiZ\n");
 610          }
 611       }
 612    }
 613
 614    for (i = 0; i < Elements(fb->Attachment); i++) {
 615       struct gl_renderbuffer *rb;
 616       struct intel_renderbuffer *irb;
 617
 618       if (fb->Attachment[i].Type == GL_NONE)
 619          continue;
 620
 621       /* A supported attachment will have a Renderbuffer set either
 622        * from being a Renderbuffer or being a texture that got the
 623        * intel_wrap_texture() treatment.
 624        */
 625       rb = fb->Attachment[i].Renderbuffer;
 626       if (rb == NULL) {
 627          fbo_incomplete(fb, "FBO incomplete: attachment without "
 628                         "renderbuffer\n");
 629          continue;
 630       }
 631
 632       if (fb->Attachment[i].Type == GL_TEXTURE) {
 633          if (rb->TexImage->Border) {
 634             fbo_incomplete(fb, "FBO incomplete: texture with border\n");
 635             continue;
 636          }
 637       }
 638
 639       irb = intel_renderbuffer(rb);
 640       if (irb == NULL) {
 641          fbo_incomplete(fb, "FBO incomplete: software rendering "
 642                         "renderbuffer\n");
 643          continue;
 644       }
 645
 646       if (!brw_render_target_supported(brw, rb)) {
 647          fbo_incomplete(fb, "FBO incomplete: Unsupported HW "
 648                         "texture/renderbuffer format attached: %s\n",
 649                         _mesa_get_format_name(intel_rb_format(irb)));
 650       }
 651    }
 652 }
 653
 654 /**
 655  * Try to do a glBlitFramebuffer using glCopyTexSubImage2D
 656  * We can do this when the dst renderbuffer is actually a texture and
 657  * there is no scaling, mirroring or scissoring.
 658  *
 659  * \return new buffer mask indicating the buffers left to blit using the
 660  *         normal path.
 661  */
 662 static GLbitfield
 663 intel_blit_framebuffer_with_blitter(struct gl_context *ctx,
 664                                     GLint srcX0, GLint srcY0,
 665                                     GLint srcX1, GLint srcY1,
 666                                     GLint dstX0, GLint dstY0,
 667                                     GLint dstX1, GLint dstY1,
 668                                     GLbitfield mask, GLenum filter)
 669 {
 670    struct brw_context *brw = brw_context(ctx);
 671
 672    if (mask & GL_COLOR_BUFFER_BIT) {
 673       GLint i;
 674       const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
 675       const struct gl_framebuffer *readFb = ctx->ReadBuffer;
 676       struct gl_renderbuffer *src_rb = readFb->_ColorReadBuffer;
 677       struct intel_renderbuffer *src_irb = intel_renderbuffer(src_rb);
 678
 679       if (!src_irb) {
 680          perf_debug("glBlitFramebuffer(): missing src renderbuffer.  "
 681                     "Falling back to software rendering.\n");
 682          return mask;
 683       }
 684
 685       /* If the source and destination are the same size with no mirroring,
 686        * the rectangles are within the size of the texture and there is no
 687        * scissor, then we can probably use the blit engine.
 688        */
 689       if (!(srcX0 - srcX1 == dstX0 - dstX1 &&
 690             srcY0 - srcY1 == dstY0 - dstY1 &&
 691             srcX1 >= srcX0 &&
 692             srcY1 >= srcY0 &&
 693             srcX0 >= 0 && srcX1 <= readFb->Width &&
 694             srcY0 >= 0 && srcY1 <= readFb->Height &&
 695             dstX0 >= 0 && dstX1 <= drawFb->Width &&
 696             dstY0 >= 0 && dstY1 <= drawFb->Height &&
 697             !ctx->Scissor.Enabled)) {
 698          perf_debug("glBlitFramebuffer(): non-1:1 blit.  "
 699                     "Falling back to software rendering.\n");
 700          return mask;
 701       }
 702
 703       /* Blit to all active draw buffers.  We don't do any pre-checking,
 704        * because we assume that copying to MRTs is rare, and failure midway
 705        * through copying is even more rare.  Even if it was to occur, it's
 706        * safe to let meta start the copy over from scratch, because
 707        * glBlitFramebuffer completely overwrites the destination pixels, and
 708        * results are undefined if any destination pixels have a dependency on
 709        * source pixels.
 710        */
 711       for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
 712          struct gl_renderbuffer *dst_rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 713          struct intel_renderbuffer *dst_irb = intel_renderbuffer(dst_rb);
 714
 715          if (!dst_irb) {
 716             perf_debug("glBlitFramebuffer(): missing dst renderbuffer.  "
 717                        "Falling back to software rendering.\n");
 718             return mask;
 719          }
 720
 721          gl_format src_format = _mesa_get_srgb_format_linear(src_rb->Format);
 722          gl_format dst_format = _mesa_get_srgb_format_linear(dst_rb->Format);
 723          if (src_format != dst_format) {
 724             perf_debug("glBlitFramebuffer(): unsupported blit from %s to %s.  "
 725                        "Falling back to software rendering.\n",
 726                        _mesa_get_format_name(src_format),
 727                        _mesa_get_format_name(dst_format));
 728             return mask;
 729          }
 730
 731          if (!intel_miptree_blit(brw,
 732                                  src_irb->mt,
 733                                  src_irb->mt_level, src_irb->mt_layer,
 734                                  srcX0, srcY0, src_rb->Name == 0,
 735                                  dst_irb->mt,
 736                                  dst_irb->mt_level, dst_irb->mt_layer,
 737                                  dstX0, dstY0, dst_rb->Name == 0,
 738                                  dstX1 - dstX0, dstY1 - dstY0, GL_COPY)) {
 739             perf_debug("glBlitFramebuffer(): unknown blit failure.  "
 740                        "Falling back to software rendering.\n");
 741             return mask;
 742          }
 743       }
 744
 745       mask &= ~GL_COLOR_BUFFER_BIT;
 746    }
 747
 748    return mask;
 749 }
 750
 751 static void
 752 intel_blit_framebuffer(struct gl_context *ctx,
 753                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 754                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
 755                        GLbitfield mask, GLenum filter)
 756 {
 757    mask = brw_blorp_framebuffer(brw_context(ctx),
 758                                 srcX0, srcY0, srcX1, srcY1,
 759                                 dstX0, dstY0, dstX1, dstY1,
 760                                 mask, filter);
 761    if (mask == 0x0)
 762       return;
 763
 764    /* Try using the BLT engine. */
 765    mask = intel_blit_framebuffer_with_blitter(ctx,
 766                                               srcX0, srcY0, srcX1, srcY1,
 767                                               dstX0, dstY0, dstX1, dstY1,
 768                                               mask, filter);
 769    if (mask == 0x0)
 770       return;
 771
 772
 773    _mesa_meta_BlitFramebuffer(ctx,
 774                               srcX0, srcY0, srcX1, srcY1,
 775                               dstX0, dstY0, dstX1, dstY1,
 776                               mask, filter);
 777 }
 778
 779 /**
 780  * This is a no-op except on multisample buffers shared with DRI2.
 781  */
 782 void
 783 intel_renderbuffer_set_needs_downsample(struct intel_renderbuffer *irb)
 784 {
 785    if (irb->mt && irb->mt->singlesample_mt)
 786       irb->mt->need_downsample = true;
 787 }
 788
 789 /**
 790  * Does the renderbuffer have hiz enabled?
 791  */
 792 bool
 793 intel_renderbuffer_has_hiz(struct intel_renderbuffer *irb)
 794 {
 795    return intel_miptree_slice_has_hiz(irb->mt, irb->mt_level, irb->mt_layer);
 796 }
 797
 798 void
 799 intel_renderbuffer_set_needs_hiz_resolve(struct intel_renderbuffer *irb)
 800 {
 801    if (irb->mt) {
 802       intel_miptree_slice_set_needs_hiz_resolve(irb->mt,
 803                                                 irb->mt_level,
 804                                                 irb->mt_layer);
 805    }
 806 }
 807
 808 void
 809 intel_renderbuffer_set_needs_depth_resolve(struct intel_renderbuffer *irb)
 810 {
 811    if (irb->mt) {
 812       intel_miptree_slice_set_needs_depth_resolve(irb->mt,
 813                                                   irb->mt_level,
 814                                                   irb->mt_layer);
 815    }
 816 }
 817
 818 bool
 819 intel_renderbuffer_resolve_hiz(struct brw_context *brw,
 820                                struct intel_renderbuffer *irb)
 821 {
 822    if (irb->mt)
 823       return intel_miptree_slice_resolve_hiz(brw,
 824                                              irb->mt,
 825                                              irb->mt_level,
 826                                              irb->mt_layer);
 827
 828    return false;
 829 }
 830
 831 bool
 832 intel_renderbuffer_resolve_depth(struct brw_context *brw,
 833                                  struct intel_renderbuffer *irb)
 834 {
 835    if (irb->mt)
 836       return intel_miptree_slice_resolve_depth(brw,
 837                                                irb->mt,
 838                                                irb->mt_level,
 839                                                irb->mt_layer);
 840
 841    return false;
 842 }
 843
 844 void
 845 intel_renderbuffer_move_to_temp(struct brw_context *brw,
 846                                 struct intel_renderbuffer *irb,
 847                                 bool invalidate)
 848 {
 849    struct gl_renderbuffer *rb =&irb->Base.Base;
 850    struct intel_texture_image *intel_image = intel_texture_image(rb->TexImage);
 851    struct intel_mipmap_tree *new_mt;
 852    int width, height, depth;
 853
 854    intel_miptree_get_dimensions_for_image(rb->TexImage, &width, &height, &depth);
 855
 856    new_mt = intel_miptree_create(brw, rb->TexImage->TexObject->Target,
 857                                  intel_image->base.Base.TexFormat,
 858                                  intel_image->base.Base.Level,
 859                                  intel_image->base.Base.Level,
 860                                  width, height, depth,
 861                                  true,
 862                                  irb->mt->num_samples,
 863                                  INTEL_MIPTREE_TILING_ANY);
 864
 865    if (brw_is_hiz_depth_format(brw, new_mt->format)) {
 866       intel_miptree_alloc_hiz(brw, new_mt);
 867    }
 868
 869    intel_miptree_copy_teximage(brw, intel_image, new_mt, invalidate);
 870
 871    intel_miptree_reference(&irb->mt, intel_image->mt);
 872    intel_renderbuffer_set_draw_offset(irb);
 873    intel_miptree_release(&new_mt);
 874 }
 875
 876 /**
 877  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 878  * Hook in device driver functions.
 879  */
 880 void
 881 intel_fbo_init(struct brw_context *brw)
 882 {
 883    struct intel_context *intel = &brw->intel;
 884    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 885    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 886    intel->ctx.Driver.MapRenderbuffer = intel_map_renderbuffer;
 887    intel->ctx.Driver.UnmapRenderbuffer = intel_unmap_renderbuffer;
 888    intel->ctx.Driver.RenderTexture = intel_render_texture;
 889    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 890    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 891    intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer;
 892    intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
 893       intel_image_target_renderbuffer_storage;
 894 }