src/mesa/drivers/dri/i915/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_context.h"
  44 #include "intel_batchbuffer.h"
  45 #include "intel_buffers.h"
  46 #include "intel_blit.h"
  47 #include "intel_fbo.h"
  48 #include "intel_mipmap_tree.h"
  49 #include "intel_regions.h"
  50 #include "intel_tex.h"
  51
  52 #define FILE_DEBUG_FLAG DEBUG_FBO
  53
  54 static struct gl_renderbuffer *
  55 intel_new_renderbuffer(struct gl_context * ctx, GLuint name);
  56
  57 struct intel_region*
  58 intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
  59 {
  60    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
  61    if (irb && irb->mt) {
  62       if (attIndex == BUFFER_STENCIL && irb->mt->stencil_mt)
  63          return irb->mt->stencil_mt->region;
  64       else
  65          return irb->mt->region;
  66    } else
  67       return NULL;
  68 }
  69
  70 /**
  71  * Create a new framebuffer object.
  72  */
  73 static struct gl_framebuffer *
  74 intel_new_framebuffer(struct gl_context * ctx, GLuint name)
  75 {
  76    /* Only drawable state in intel_framebuffer at this time, just use Mesa's
  77     * class
  78     */
  79    return _mesa_new_framebuffer(ctx, name);
  80 }
  81
  82
  83 /** Called by gl_renderbuffer::Delete() */
  84 static void
  85 intel_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
  86 {
  87    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  88
  89    ASSERT(irb);
  90
  91    intel_miptree_release(&irb->mt);
  92
  93    _mesa_delete_renderbuffer(ctx, rb);
  94 }
  95
  96 /**
  97  * \see dd_function_table::MapRenderbuffer
  98  */
  99 static void
 100 intel_map_renderbuffer(struct gl_context *ctx,
 101                        struct gl_renderbuffer *rb,
 102                        GLuint x, GLuint y, GLuint w, GLuint h,
 103                        GLbitfield mode,
 104                        GLubyte **out_map,
 105                        GLint *out_stride)
 106 {
 107    struct intel_context *intel = intel_context(ctx);
 108    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
 109    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 110    void *map;
 111    int stride;
 112
 113    if (srb->Buffer) {
 114       /* this is a malloc'd renderbuffer (accum buffer), not an irb */
 115       GLint bpp = _mesa_get_format_bytes(rb->Format);
 116       GLint rowStride = srb->RowStride;
 117       *out_map = (GLubyte *) srb->Buffer + y * rowStride + x * bpp;
 118       *out_stride = rowStride;
 119       return;
 120    }
 121
 122    intel_prepare_render(intel);
 123
 124    /* For a window-system renderbuffer, we need to flip the mapping we receive
 125     * upside-down.  So we need to ask for a rectangle on flipped vertically, and
 126     * we then return a pointer to the bottom of it with a negative stride.
 127     */
 128    if (rb->Name == 0) {
 129       y = rb->Height - y - h;
 130    }
 131
 132    intel_miptree_map(intel, irb->mt, irb->mt_level, irb->mt_layer,
 133                      x, y, w, h, mode, &map, &stride);
 134
 135    if (rb->Name == 0) {
 136       map += (h - 1) * stride;
 137       stride = -stride;
 138    }
 139
 140    DBG("%s: rb %d (%s) mt mapped: (%d, %d) (%dx%d) -> %p/%d\n",
 141        __FUNCTION__, rb->Name, _mesa_get_format_name(rb->Format),
 142        x, y, w, h, map, stride);
 143
 144    *out_map = map;
 145    *out_stride = stride;
 146 }
 147
 148 /**
 149  * \see dd_function_table::UnmapRenderbuffer
 150  */
 151 static void
 152 intel_unmap_renderbuffer(struct gl_context *ctx,
 153                          struct gl_renderbuffer *rb)
 154 {
 155    struct intel_context *intel = intel_context(ctx);
 156    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
 157    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 158
 159    DBG("%s: rb %d (%s)\n", __FUNCTION__,
 160        rb->Name, _mesa_get_format_name(rb->Format));
 161
 162    if (srb->Buffer) {
 163       /* this is a malloc'd renderbuffer (accum buffer) */
 164       /* nothing to do */
 165       return;
 166    }
 167
 168    intel_miptree_unmap(intel, irb->mt, irb->mt_level, irb->mt_layer);
 169 }
 170
 171 /**
 172  * Called via glRenderbufferStorageEXT() to set the format and allocate
 173  * storage for a user-created renderbuffer.
 174  */
 175 static GLboolean
 176 intel_alloc_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 177                                  GLenum internalFormat,
 178                                  GLuint width, GLuint height)
 179 {
 180    struct intel_context *intel = intel_context(ctx);
 181    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 182
 183    switch (internalFormat) {
 184    default:
 185       /* Use the same format-choice logic as for textures.
 186        * Renderbuffers aren't any different from textures for us,
 187        * except they're less useful because you can't texture with
 188        * them.
 189        */
 190       rb->Format = intel->ctx.Driver.ChooseTextureFormat(ctx, GL_TEXTURE_2D,
 191                                                          internalFormat,
 192                                                          GL_NONE, GL_NONE);
 193       break;
 194    case GL_STENCIL_INDEX:
 195    case GL_STENCIL_INDEX1_EXT:
 196    case GL_STENCIL_INDEX4_EXT:
 197    case GL_STENCIL_INDEX8_EXT:
 198    case GL_STENCIL_INDEX16_EXT:
 199       /* These aren't actual texture formats, so force them here. */
 200       if (intel->has_separate_stencil) {
 201          rb->Format = MESA_FORMAT_S8;
 202       } else {
 203          assert(!intel->must_use_separate_stencil);
 204          rb->Format = MESA_FORMAT_S8_Z24;
 205       }
 206       break;
 207    }
 208
 209    rb->Width = width;
 210    rb->Height = height;
 211    rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 212
 213    intel_miptree_release(&irb->mt);
 214
 215    DBG("%s: %s: %s (%dx%d)\n", __FUNCTION__,
 216        _mesa_lookup_enum_by_nr(internalFormat),
 217        _mesa_get_format_name(rb->Format), width, height);
 218
 219    if (width == 0 || height == 0)
 220       return true;
 221
 222    irb->mt = intel_miptree_create_for_renderbuffer(intel, rb->Format,
 223                                                    width, height);
 224    if (!irb->mt)
 225       return false;
 226
 227    return true;
 228 }
 229
 230
 231 static void
 232 intel_image_target_renderbuffer_storage(struct gl_context *ctx,
 233                                         struct gl_renderbuffer *rb,
 234                                         void *image_handle)
 235 {
 236    struct intel_context *intel = intel_context(ctx);
 237    struct intel_renderbuffer *irb;
 238    __DRIscreen *screen;
 239    __DRIimage *image;
 240
 241    screen = intel->intelScreen->driScrnPriv;
 242    image = screen->dri2.image->lookupEGLImage(screen, image_handle,
 243                                               screen->loaderPrivate);
 244    if (image == NULL)
 245       return;
 246
 247    /* __DRIimage is opaque to the core so it has to be checked here */
 248    switch (image->format) {
 249    case MESA_FORMAT_RGBA8888_REV:
 250       _mesa_error(&intel->ctx, GL_INVALID_OPERATION,
 251             "glEGLImageTargetRenderbufferStorage(unsupported image format");
 252       return;
 253       break;
 254    default:
 255       break;
 256    }
 257
 258    irb = intel_renderbuffer(rb);
 259    intel_miptree_release(&irb->mt);
 260    irb->mt = intel_miptree_create_for_bo(intel,
 261                                          image->region->bo,
 262                                          image->format,
 263                                          image->offset,
 264                                          image->region->width,
 265                                          image->region->height,
 266                                          image->region->pitch,
 267                                          image->region->tiling);
 268    if (!irb->mt)
 269       return;
 270
 271    rb->InternalFormat = image->internal_format;
 272    rb->Width = image->region->width;
 273    rb->Height = image->region->height;
 274    rb->Format = image->format;
 275    rb->_BaseFormat = _mesa_base_fbo_format(&intel->ctx,
 276                                            image->internal_format);
 277    rb->NeedsFinishRenderTexture = true;
 278 }
 279
 280 /**
 281  * Called by _mesa_resize_framebuffer() for each hardware renderbuffer when a
 282  * window system framebuffer is resized.
 283  *
 284  * Any actual buffer reallocations for hardware renderbuffers (which would
 285  * have triggered _mesa_resize_framebuffer()) were done by
 286  * intel_process_dri2_buffer().
 287  */
 288 static GLboolean
 289 intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 290                            GLenum internalFormat, GLuint width, GLuint height)
 291 {
 292    ASSERT(rb->Name == 0);
 293    rb->Width = width;
 294    rb->Height = height;
 295    rb->InternalFormat = internalFormat;
 296
 297    return true;
 298 }
 299
 300 /** Dummy function for gl_renderbuffer::AllocStorage() */
 301 static GLboolean
 302 intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
 303                         GLenum internalFormat, GLuint width, GLuint height)
 304 {
 305    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 306    return false;
 307 }
 308
 309 /**
 310  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 311  * not a user-created renderbuffer.
 312  */
 313 struct intel_renderbuffer *
 314 intel_create_renderbuffer(gl_format format)
 315 {
 316    struct intel_renderbuffer *irb;
 317    struct gl_renderbuffer *rb;
 318
 319    GET_CURRENT_CONTEXT(ctx);
 320
 321    irb = CALLOC_STRUCT(intel_renderbuffer);
 322    if (!irb) {
 323       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 324       return NULL;
 325    }
 326
 327    rb = &irb->Base.Base;
 328
 329    _mesa_init_renderbuffer(rb, 0);
 330    rb->ClassID = INTEL_RB_CLASS;
 331    rb->_BaseFormat = _mesa_get_format_base_format(format);
 332    rb->Format = format;
 333    rb->InternalFormat = rb->_BaseFormat;
 334
 335    /* intel-specific methods */
 336    rb->Delete = intel_delete_renderbuffer;
 337    rb->AllocStorage = intel_alloc_window_storage;
 338
 339    return irb;
 340 }
 341
 342 /**
 343  * Private window-system buffers (as opposed to ones shared with the display
 344  * server created with intel_create_renderbuffer()) are most similar in their
 345  * handling to user-created renderbuffers, but they have a resize handler that
 346  * may be called at intel_update_renderbuffers() time.
 347  */
 348 struct intel_renderbuffer *
 349 intel_create_private_renderbuffer(gl_format format)
 350 {
 351    struct intel_renderbuffer *irb;
 352
 353    irb = intel_create_renderbuffer(format);
 354    irb->Base.Base.AllocStorage = intel_alloc_renderbuffer_storage;
 355
 356    return irb;
 357 }
 358
 359 /**
 360  * Create a new renderbuffer object.
 361  * Typically called via glBindRenderbufferEXT().
 362  */
 363 static struct gl_renderbuffer *
 364 intel_new_renderbuffer(struct gl_context * ctx, GLuint name)
 365 {
 366    /*struct intel_context *intel = intel_context(ctx); */
 367    struct intel_renderbuffer *irb;
 368    struct gl_renderbuffer *rb;
 369
 370    irb = CALLOC_STRUCT(intel_renderbuffer);
 371    if (!irb) {
 372       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 373       return NULL;
 374    }
 375
 376    rb = &irb->Base.Base;
 377
 378    _mesa_init_renderbuffer(rb, name);
 379    rb->ClassID = INTEL_RB_CLASS;
 380
 381    /* intel-specific methods */
 382    rb->Delete = intel_delete_renderbuffer;
 383    rb->AllocStorage = intel_alloc_renderbuffer_storage;
 384    /* span routines set in alloc_storage function */
 385
 386    return rb;
 387 }
 388
 389
 390 /**
 391  * Called via glBindFramebufferEXT().
 392  */
 393 static void
 394 intel_bind_framebuffer(struct gl_context * ctx, GLenum target,
 395                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 396 {
 397    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 398       intel_draw_buffer(ctx);
 399    }
 400    else {
 401       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 402    }
 403 }
 404
 405
 406 /**
 407  * Called via glFramebufferRenderbufferEXT().
 408  */
 409 static void
 410 intel_framebuffer_renderbuffer(struct gl_context * ctx,
 411                                struct gl_framebuffer *fb,
 412                                GLenum attachment, struct gl_renderbuffer *rb)
 413 {
 414    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
 415
 416    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 417    intel_draw_buffer(ctx);
 418 }
 419
 420 static bool
 421 intel_renderbuffer_update_wrapper(struct intel_context *intel,
 422                                   struct intel_renderbuffer *irb,
 423                                   struct gl_texture_image *image,
 424                                   uint32_t layer)
 425 {
 426    struct gl_renderbuffer *rb = &irb->Base.Base;
 427    struct intel_texture_image *intel_image = intel_texture_image(image);
 428    struct intel_mipmap_tree *mt = intel_image->mt;
 429    int level = image->Level;
 430
 431    rb->Depth = image->Depth;
 432
 433    rb->AllocStorage = intel_nop_alloc_storage;
 434
 435    intel_miptree_check_level_layer(mt, level, layer);
 436    irb->mt_level = level;
 437    irb->mt_layer = layer;
 438
 439    intel_miptree_reference(&irb->mt, mt);
 440
 441    intel_renderbuffer_set_draw_offset(irb);
 442
 443    return true;
 444 }
 445
 446 void
 447 intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb)
 448 {
 449    unsigned int dst_x, dst_y;
 450
 451    /* compute offset of the particular 2D image within the texture region */
 452    intel_miptree_get_image_offset(irb->mt,
 453                                   irb->mt_level,
 454                                   irb->mt_layer,
 455                                   &dst_x, &dst_y);
 456
 457    irb->draw_x = dst_x;
 458    irb->draw_y = dst_y;
 459 }
 460
 461 /**
 462  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 463  * prepare for rendering into texture memory.  This might be called
 464  * many times to choose different texture levels, cube faces, etc
 465  * before intel_finish_render_texture() is ever called.
 466  */
 467 static void
 468 intel_render_texture(struct gl_context * ctx,
 469                      struct gl_framebuffer *fb,
 470                      struct gl_renderbuffer_attachment *att)
 471 {
 472    struct intel_context *intel = intel_context(ctx);
 473    struct gl_renderbuffer *rb = att->Renderbuffer;
 474    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 475    struct gl_texture_image *image = rb->TexImage;
 476    struct intel_texture_image *intel_image = intel_texture_image(image);
 477    struct intel_mipmap_tree *mt = intel_image->mt;
 478    int layer;
 479
 480    (void) fb;
 481
 482    if (att->CubeMapFace > 0) {
 483       assert(att->Zoffset == 0);
 484       layer = att->CubeMapFace;
 485    } else {
 486       layer = att->Zoffset;
 487    }
 488
 489    if (!intel_image->mt) {
 490       /* Fallback on drawing to a texture that doesn't have a miptree
 491        * (has a border, width/height 0, etc.)
 492        */
 493       _swrast_render_texture(ctx, fb, att);
 494       return;
 495    }
 496
 497    intel_miptree_check_level_layer(mt, att->TextureLevel, layer);
 498
 499    if (!intel_renderbuffer_update_wrapper(intel, irb, image, layer)) {
 500        _swrast_render_texture(ctx, fb, att);
 501        return;
 502    }
 503
 504    DBG("Begin render %s texture tex=%u w=%d h=%d d=%d refcount=%d\n",
 505        _mesa_get_format_name(image->TexFormat),
 506        att->Texture->Name, image->Width, image->Height, image->Depth,
 507        rb->RefCount);
 508
 509    /* update drawing region, etc */
 510    intel_draw_buffer(ctx);
 511 }
 512
 513
 514 /**
 515  * Called by Mesa when rendering to a texture is done.
 516  */
 517 static void
 518 intel_finish_render_texture(struct gl_context * ctx, struct gl_renderbuffer *rb)
 519 {
 520    struct intel_context *intel = intel_context(ctx);
 521
 522    DBG("Finish render %s texture\n", _mesa_get_format_name(rb->Format));
 523
 524    /* Since we've (probably) rendered to the texture and will (likely) use
 525     * it in the texture domain later on in this batchbuffer, flush the
 526     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 527     * usage inside of a batchbuffer like GEM does in the kernel.
 528     */
 529    intel_batchbuffer_emit_mi_flush(intel);
 530 }
 531
 532 #define fbo_incomplete(fb, ...) do {                                          \
 533       static GLuint msg_id = 0;                                               \
 534       if (unlikely(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT)) {    \
 535          _mesa_gl_debug(ctx, &msg_id,                                         \
 536                         MESA_DEBUG_TYPE_OTHER,                                \
 537                         MESA_DEBUG_SEVERITY_MEDIUM,                           \
 538                         __VA_ARGS__);                                         \
 539       }                                                                       \
 540       DBG(__VA_ARGS__);                                                       \
 541       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED;                               \
 542    } while (0)
 543
 544 /**
 545  * Do additional "completeness" testing of a framebuffer object.
 546  */
 547 static void
 548 intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 549 {
 550    struct intel_context *intel = intel_context(ctx);
 551    struct intel_renderbuffer *depthRb =
 552       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 553    struct intel_renderbuffer *stencilRb =
 554       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 555    struct intel_mipmap_tree *depth_mt = NULL, *stencil_mt = NULL;
 556    int i;
 557
 558    DBG("%s() on fb %p (%s)\n", __FUNCTION__,
 559        fb, (fb == ctx->DrawBuffer ? "drawbuffer" :
 560             (fb == ctx->ReadBuffer ? "readbuffer" : "other buffer")));
 561
 562    if (depthRb)
 563       depth_mt = depthRb->mt;
 564    if (stencilRb) {
 565       stencil_mt = stencilRb->mt;
 566       if (stencil_mt->stencil_mt)
 567          stencil_mt = stencil_mt->stencil_mt;
 568    }
 569
 570    if (depth_mt && stencil_mt) {
 571       if (depth_mt == stencil_mt) {
 572          /* For true packed depth/stencil (not faked on prefers-separate-stencil
 573           * hardware) we need to be sure they're the same level/layer, since
 574           * we'll be emitting a single packet describing the packed setup.
 575           */
 576          if (depthRb->mt_level != stencilRb->mt_level ||
 577              depthRb->mt_layer != stencilRb->mt_layer) {
 578             fbo_incomplete(fb,
 579                            "FBO incomplete: depth image level/layer %d/%d != "
 580                            "stencil image %d/%d\n",
 581                            depthRb->mt_level,
 582                            depthRb->mt_layer,
 583                            stencilRb->mt_level,
 584                            stencilRb->mt_layer);
 585          }
 586       } else {
 587          if (!intel->has_separate_stencil) {
 588             fbo_incomplete(fb, "FBO incomplete: separate stencil "
 589                            "unsupported\n");
 590          }
 591          if (stencil_mt->format != MESA_FORMAT_S8) {
 592             fbo_incomplete(fb, "FBO incomplete: separate stencil is %s "
 593                            "instead of S8\n",
 594                            _mesa_get_format_name(stencil_mt->format));
 595          }
 596       }
 597    }
 598
 599    for (i = 0; i < Elements(fb->Attachment); i++) {
 600       struct gl_renderbuffer *rb;
 601       struct intel_renderbuffer *irb;
 602
 603       if (fb->Attachment[i].Type == GL_NONE)
 604          continue;
 605
 606       /* A supported attachment will have a Renderbuffer set either
 607        * from being a Renderbuffer or being a texture that got the
 608        * intel_wrap_texture() treatment.
 609        */
 610       rb = fb->Attachment[i].Renderbuffer;
 611       if (rb == NULL) {
 612          fbo_incomplete(fb, "FBO incomplete: attachment without "
 613                         "renderbuffer\n");
 614          continue;
 615       }
 616
 617       if (fb->Attachment[i].Type == GL_TEXTURE) {
 618          if (rb->TexImage->Border) {
 619             fbo_incomplete(fb, "FBO incomplete: texture with border\n");
 620             continue;
 621          }
 622       }
 623
 624       irb = intel_renderbuffer(rb);
 625       if (irb == NULL) {
 626          fbo_incomplete(fb, "FBO incomplete: software rendering "
 627                         "renderbuffer\n");
 628          continue;
 629       }
 630
 631       if (!intel->vtbl.render_target_supported(intel, rb)) {
 632          fbo_incomplete(fb, "FBO incomplete: Unsupported HW "
 633                         "texture/renderbuffer format attached: %s\n",
 634                         _mesa_get_format_name(intel_rb_format(irb)));
 635       }
 636    }
 637 }
 638
 639 /**
 640  * Try to do a glBlitFramebuffer using glCopyTexSubImage2D
 641  * We can do this when the dst renderbuffer is actually a texture and
 642  * there is no scaling, mirroring or scissoring.
 643  *
 644  * \return new buffer mask indicating the buffers left to blit using the
 645  *         normal path.
 646  */
 647 static GLbitfield
 648 intel_blit_framebuffer_with_blitter(struct gl_context *ctx,
 649                                     GLint srcX0, GLint srcY0,
 650                                     GLint srcX1, GLint srcY1,
 651                                     GLint dstX0, GLint dstY0,
 652                                     GLint dstX1, GLint dstY1,
 653                                     GLbitfield mask, GLenum filter)
 654 {
 655    struct intel_context *intel = intel_context(ctx);
 656
 657    if (mask & GL_COLOR_BUFFER_BIT) {
 658       GLint i;
 659       const struct gl_framebuffer *drawFb = ctx->DrawBuffer;
 660       const struct gl_framebuffer *readFb = ctx->ReadBuffer;
 661       struct gl_renderbuffer *src_rb = readFb->_ColorReadBuffer;
 662       struct intel_renderbuffer *src_irb = intel_renderbuffer(src_rb);
 663
 664       if (!src_irb) {
 665          perf_debug("glBlitFramebuffer(): missing src renderbuffer.  "
 666                     "Falling back to software rendering.\n");
 667          return mask;
 668       }
 669
 670       /* If the source and destination are the same size with no mirroring,
 671        * the rectangles are within the size of the texture and there is no
 672        * scissor, then we can probably use the blit engine.
 673        */
 674       if (!(srcX0 - srcX1 == dstX0 - dstX1 &&
 675             srcY0 - srcY1 == dstY0 - dstY1 &&
 676             srcX1 >= srcX0 &&
 677             srcY1 >= srcY0 &&
 678             srcX0 >= 0 && srcX1 <= readFb->Width &&
 679             srcY0 >= 0 && srcY1 <= readFb->Height &&
 680             dstX0 >= 0 && dstX1 <= drawFb->Width &&
 681             dstY0 >= 0 && dstY1 <= drawFb->Height &&
 682             !ctx->Scissor.Enabled)) {
 683          perf_debug("glBlitFramebuffer(): non-1:1 blit.  "
 684                     "Falling back to software rendering.\n");
 685          return mask;
 686       }
 687
 688       /* Blit to all active draw buffers.  We don't do any pre-checking,
 689        * because we assume that copying to MRTs is rare, and failure midway
 690        * through copying is even more rare.  Even if it was to occur, it's
 691        * safe to let meta start the copy over from scratch, because
 692        * glBlitFramebuffer completely overwrites the destination pixels, and
 693        * results are undefined if any destination pixels have a dependency on
 694        * source pixels.
 695        */
 696       for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {
 697          struct gl_renderbuffer *dst_rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 698          struct intel_renderbuffer *dst_irb = intel_renderbuffer(dst_rb);
 699
 700          if (!dst_irb) {
 701             perf_debug("glBlitFramebuffer(): missing dst renderbuffer.  "
 702                        "Falling back to software rendering.\n");
 703             return mask;
 704          }
 705
 706          gl_format src_format = _mesa_get_srgb_format_linear(src_rb->Format);
 707          gl_format dst_format = _mesa_get_srgb_format_linear(dst_rb->Format);
 708          if (src_format != dst_format) {
 709             perf_debug("glBlitFramebuffer(): unsupported blit from %s to %s.  "
 710                        "Falling back to software rendering.\n",
 711                        _mesa_get_format_name(src_format),
 712                        _mesa_get_format_name(dst_format));
 713             return mask;
 714          }
 715
 716          if (!intel_miptree_blit(intel,
 717                                  src_irb->mt,
 718                                  src_irb->mt_level, src_irb->mt_layer,
 719                                  srcX0, srcY0, src_rb->Name == 0,
 720                                  dst_irb->mt,
 721                                  dst_irb->mt_level, dst_irb->mt_layer,
 722                                  dstX0, dstY0, dst_rb->Name == 0,
 723                                  dstX1 - dstX0, dstY1 - dstY0, GL_COPY)) {
 724             perf_debug("glBlitFramebuffer(): unknown blit failure.  "
 725                        "Falling back to software rendering.\n");
 726             return mask;
 727          }
 728       }
 729
 730       mask &= ~GL_COLOR_BUFFER_BIT;
 731    }
 732
 733    return mask;
 734 }
 735
 736 static void
 737 intel_blit_framebuffer(struct gl_context *ctx,
 738                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 739                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
 740                        GLbitfield mask, GLenum filter)
 741 {
 742    /* Try using the BLT engine. */
 743    mask = intel_blit_framebuffer_with_blitter(ctx,
 744                                               srcX0, srcY0, srcX1, srcY1,
 745                                               dstX0, dstY0, dstX1, dstY1,
 746                                               mask, filter);
 747    if (mask == 0x0)
 748       return;
 749
 750
 751    _mesa_meta_BlitFramebuffer(ctx,
 752                               srcX0, srcY0, srcX1, srcY1,
 753                               dstX0, dstY0, dstX1, dstY1,
 754                               mask, filter);
 755 }
 756
 757 void
 758 intel_renderbuffer_move_to_temp(struct intel_context *intel,
 759                                 struct intel_renderbuffer *irb,
 760                                 bool invalidate)
 761 {
 762    struct gl_renderbuffer *rb =&irb->Base.Base;
 763    struct intel_texture_image *intel_image = intel_texture_image(rb->TexImage);
 764    struct intel_mipmap_tree *new_mt;
 765    int width, height, depth;
 766
 767    intel_miptree_get_dimensions_for_image(rb->TexImage, &width, &height, &depth);
 768
 769    new_mt = intel_miptree_create(intel, rb->TexImage->TexObject->Target,
 770                                  intel_image->base.Base.TexFormat,
 771                                  intel_image->base.Base.Level,
 772                                  intel_image->base.Base.Level,
 773                                  width, height, depth,
 774                                  true,
 775                                  INTEL_MIPTREE_TILING_ANY);
 776
 777    intel_miptree_copy_teximage(intel, intel_image, new_mt, invalidate);
 778
 779    intel_miptree_reference(&irb->mt, intel_image->mt);
 780    intel_renderbuffer_set_draw_offset(irb);
 781    intel_miptree_release(&new_mt);
 782 }
 783
 784 /**
 785  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 786  * Hook in device driver functions.
 787  */
 788 void
 789 intel_fbo_init(struct intel_context *intel)
 790 {
 791    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 792    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 793    intel->ctx.Driver.MapRenderbuffer = intel_map_renderbuffer;
 794    intel->ctx.Driver.UnmapRenderbuffer = intel_unmap_renderbuffer;
 795    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
 796    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
 797    intel->ctx.Driver.RenderTexture = intel_render_texture;
 798    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 799    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 800    intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer;
 801    intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
 802       intel_image_target_renderbuffer_storage;
 803 }