src/mesa/drivers/dri/intel/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/imports.h"
  30 #include "main/macros.h"
  31 #include "main/mtypes.h"
  32 #include "main/fbobject.h"
  33 #include "main/framebuffer.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/context.h"
  36 #include "main/texrender.h"
  37 #include "drivers/common/meta.h"
  38
  39 #include "intel_context.h"
  40 #include "intel_batchbuffer.h"
  41 #include "intel_buffers.h"
  42 #include "intel_fbo.h"
  43 #include "intel_mipmap_tree.h"
  44 #include "intel_regions.h"
  45
  46
  47 #define FILE_DEBUG_FLAG DEBUG_FBO
  48
  49
  50 /**
  51  * Create a new framebuffer object.
  52  */
  53 static struct gl_framebuffer *
  54 intel_new_framebuffer(GLcontext * ctx, GLuint name)
  55 {
  56    /* Only drawable state in intel_framebuffer at this time, just use Mesa's
  57     * class
  58     */
  59    return _mesa_new_framebuffer(ctx, name);
  60 }
  61
  62
  63 /** Called by gl_renderbuffer::Delete() */
  64 static void
  65 intel_delete_renderbuffer(struct gl_renderbuffer *rb)
  66 {
  67    GET_CURRENT_CONTEXT(ctx);
  68    struct intel_context *intel = intel_context(ctx);
  69    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  70
  71    ASSERT(irb);
  72
  73    if (irb->span_cache != NULL)
  74       _mesa_free(irb->span_cache);
  75
  76    if (intel && irb->region) {
  77       intel_region_release(&irb->region);
  78    }
  79
  80    _mesa_free(irb);
  81 }
  82
  83
  84 /**
  85  * Return a pointer to a specific pixel in a renderbuffer.
  86  */
  87 static void *
  88 intel_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
  89                   GLint x, GLint y)
  90 {
  91    /* By returning NULL we force all software rendering to go through
  92     * the span routines.
  93     */
  94    return NULL;
  95 }
  96
  97
  98 /**
  99  * Called via glRenderbufferStorageEXT() to set the format and allocate
 100  * storage for a user-created renderbuffer.
 101  */
 102 static GLboolean
 103 intel_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 104                                  GLenum internalFormat,
 105                                  GLuint width, GLuint height)
 106 {
 107    struct intel_context *intel = intel_context(ctx);
 108    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 109    int cpp;
 110    GLuint pitch;
 111
 112    ASSERT(rb->Name != 0);
 113
 114    switch (internalFormat) {
 115    case GL_R3_G3_B2:
 116    case GL_RGB4:
 117    case GL_RGB5:
 118       rb->Format = MESA_FORMAT_RGB565;
 119       rb->DataType = GL_UNSIGNED_BYTE;
 120       cpp = 2;
 121       break;
 122    case GL_RGB:
 123    case GL_RGB8:
 124    case GL_RGB10:
 125    case GL_RGB12:
 126    case GL_RGB16:
 127       rb->Format = MESA_FORMAT_ARGB8888; /* XXX: Need xrgb8888 */
 128       rb->DataType = GL_UNSIGNED_BYTE;
 129       cpp = 4;
 130       break;
 131    case GL_RGBA:
 132    case GL_RGBA2:
 133    case GL_RGBA4:
 134    case GL_RGB5_A1:
 135    case GL_RGBA8:
 136    case GL_RGB10_A2:
 137    case GL_RGBA12:
 138    case GL_RGBA16:
 139       rb->Format = MESA_FORMAT_ARGB8888;
 140       rb->DataType = GL_UNSIGNED_BYTE;
 141       cpp = 4;
 142       break;
 143    case GL_STENCIL_INDEX:
 144    case GL_STENCIL_INDEX1_EXT:
 145    case GL_STENCIL_INDEX4_EXT:
 146    case GL_STENCIL_INDEX8_EXT:
 147    case GL_STENCIL_INDEX16_EXT:
 148       /* alloc a depth+stencil buffer */
 149       rb->Format = MESA_FORMAT_S8_Z24;
 150       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 151       cpp = 4;
 152       break;
 153    case GL_DEPTH_COMPONENT16:
 154       rb->Format = MESA_FORMAT_Z16;
 155       rb->DataType = GL_UNSIGNED_SHORT;
 156       cpp = 2;
 157       break;
 158    case GL_DEPTH_COMPONENT:
 159    case GL_DEPTH_COMPONENT24:
 160    case GL_DEPTH_COMPONENT32:
 161       rb->Format = MESA_FORMAT_S8_Z24;
 162       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 163       cpp = 4;
 164       break;
 165    case GL_DEPTH_STENCIL_EXT:
 166    case GL_DEPTH24_STENCIL8_EXT:
 167       rb->Format = MESA_FORMAT_S8_Z24;
 168       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 169       cpp = 4;
 170       break;
 171    default:
 172       _mesa_problem(ctx,
 173                     "Unexpected format in intel_alloc_renderbuffer_storage");
 174       return GL_FALSE;
 175    }
 176
 177    rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 178
 179    intelFlush(ctx);
 180
 181    /* free old region */
 182    if (irb->region) {
 183       intel_region_release(&irb->region);
 184    }
 185
 186    /* allocate new memory region/renderbuffer */
 187
 188    /* Choose a pitch to match hardware requirements:
 189     */
 190    pitch = ((cpp * width + 63) & ~63) / cpp;
 191
 192    /* alloc hardware renderbuffer */
 193    DBG("Allocating %d x %d Intel RBO (pitch %d)\n", width, height, pitch);
 194
 195    irb->region = intel_region_alloc(intel, I915_TILING_NONE, cpp,
 196                                     width, height, pitch, GL_TRUE);
 197    if (!irb->region)
 198       return GL_FALSE;       /* out of memory? */
 199
 200    ASSERT(irb->region->buffer);
 201
 202    rb->Width = width;
 203    rb->Height = height;
 204
 205    return GL_TRUE;
 206 }
 207
 208
 209 /**
 210  * Called for each hardware renderbuffer when a _window_ is resized.
 211  * Just update fields.
 212  * Not used for user-created renderbuffers!
 213  */
 214 static GLboolean
 215 intel_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 216                            GLenum internalFormat, GLuint width, GLuint height)
 217 {
 218    ASSERT(rb->Name == 0);
 219    rb->Width = width;
 220    rb->Height = height;
 221    rb->InternalFormat = internalFormat;
 222
 223    return GL_TRUE;
 224 }
 225
 226
 227 static void
 228 intel_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
 229                      GLuint width, GLuint height)
 230 {
 231    struct intel_framebuffer *intel_fb = (struct intel_framebuffer*)fb;
 232    int i;
 233
 234    _mesa_resize_framebuffer(ctx, fb, width, height);
 235
 236    fb->Initialized = GL_TRUE; /* XXX remove someday */
 237
 238    if (fb->Name != 0) {
 239       return;
 240    }
 241
 242    /* Make sure all window system renderbuffers are up to date */
 243    for (i = 0; i < 2; i++) {
 244       struct gl_renderbuffer *rb = &intel_fb->color_rb[i]->Base;
 245
 246       /* only resize if size is changing */
 247       if (rb && (rb->Width != width || rb->Height != height)) {
 248          rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
 249       }
 250    }
 251 }
 252
 253
 254 /** Dummy function for gl_renderbuffer::AllocStorage() */
 255 static GLboolean
 256 intel_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 257                         GLenum internalFormat, GLuint width, GLuint height)
 258 {
 259    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 260    return GL_FALSE;
 261 }
 262
 263
 264 void
 265 intel_renderbuffer_set_region(struct intel_renderbuffer *rb,
 266                               struct intel_region *region)
 267 {
 268    struct intel_region *old;
 269
 270    old = rb->region;
 271    rb->region = NULL;
 272    intel_region_reference(&rb->region, region);
 273    intel_region_release(&old);
 274 }
 275
 276
 277 /**
 278  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 279  * not a user-created renderbuffer.
 280  */
 281 struct intel_renderbuffer *
 282 intel_create_renderbuffer(gl_format format)
 283 {
 284    GET_CURRENT_CONTEXT(ctx);
 285
 286    struct intel_renderbuffer *irb;
 287    const GLuint name = 0;
 288
 289    irb = CALLOC_STRUCT(intel_renderbuffer);
 290    if (!irb) {
 291       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 292       return NULL;
 293    }
 294
 295    _mesa_init_renderbuffer(&irb->Base, name);
 296    irb->Base.ClassID = INTEL_RB_CLASS;
 297
 298    switch (format) {
 299    case MESA_FORMAT_RGB565:
 300       irb->Base._BaseFormat = GL_RGB;
 301       irb->Base.DataType = GL_UNSIGNED_BYTE;
 302       break;
 303    case MESA_FORMAT_XRGB8888:
 304       /* XXX this is a hack since XRGB surfaces don't seem to work
 305        * properly yet.  Reading the alpha channel returns 0 instead of 1.
 306        */
 307       format = MESA_FORMAT_ARGB8888;
 308       irb->Base._BaseFormat = GL_RGB;
 309       irb->Base.DataType = GL_UNSIGNED_BYTE;
 310       break;
 311    case MESA_FORMAT_ARGB8888:
 312       irb->Base._BaseFormat = GL_RGBA;
 313       irb->Base.DataType = GL_UNSIGNED_BYTE;
 314       break;
 315    case MESA_FORMAT_Z16:
 316       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 317       irb->Base.DataType = GL_UNSIGNED_SHORT;
 318       break;
 319    case MESA_FORMAT_X8_Z24:
 320       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 321       irb->Base.DataType = GL_UNSIGNED_INT;
 322       break;
 323    case MESA_FORMAT_S8_Z24:
 324       irb->Base._BaseFormat = GL_DEPTH_STENCIL;
 325       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 326       break;
 327    default:
 328       _mesa_problem(NULL,
 329                     "Unexpected intFormat in intel_create_renderbuffer");
 330       _mesa_free(irb);
 331       return NULL;
 332    }
 333
 334    irb->Base.Format = format;
 335    irb->Base.InternalFormat = irb->Base._BaseFormat;
 336
 337    /* intel-specific methods */
 338    irb->Base.Delete = intel_delete_renderbuffer;
 339    irb->Base.AllocStorage = intel_alloc_window_storage;
 340    irb->Base.GetPointer = intel_get_pointer;
 341
 342    return irb;
 343 }
 344
 345
 346 /**
 347  * Create a new renderbuffer object.
 348  * Typically called via glBindRenderbufferEXT().
 349  */
 350 static struct gl_renderbuffer *
 351 intel_new_renderbuffer(GLcontext * ctx, GLuint name)
 352 {
 353    /*struct intel_context *intel = intel_context(ctx); */
 354    struct intel_renderbuffer *irb;
 355
 356    irb = CALLOC_STRUCT(intel_renderbuffer);
 357    if (!irb) {
 358       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 359       return NULL;
 360    }
 361
 362    _mesa_init_renderbuffer(&irb->Base, name);
 363    irb->Base.ClassID = INTEL_RB_CLASS;
 364
 365    /* intel-specific methods */
 366    irb->Base.Delete = intel_delete_renderbuffer;
 367    irb->Base.AllocStorage = intel_alloc_renderbuffer_storage;
 368    irb->Base.GetPointer = intel_get_pointer;
 369    /* span routines set in alloc_storage function */
 370
 371    return &irb->Base;
 372 }
 373
 374
 375 /**
 376  * Called via glBindFramebufferEXT().
 377  */
 378 static void
 379 intel_bind_framebuffer(GLcontext * ctx, GLenum target,
 380                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 381 {
 382    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 383       intel_draw_buffer(ctx, fb);
 384    }
 385    else {
 386       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 387    }
 388 }
 389
 390
 391 /**
 392  * Called via glFramebufferRenderbufferEXT().
 393  */
 394 static void
 395 intel_framebuffer_renderbuffer(GLcontext * ctx,
 396                                struct gl_framebuffer *fb,
 397                                GLenum attachment, struct gl_renderbuffer *rb)
 398 {
 399    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
 400
 401    intelFlush(ctx);
 402
 403    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 404    intel_draw_buffer(ctx, fb);
 405 }
 406
 407
 408 static GLboolean
 409 intel_update_wrapper(GLcontext *ctx, struct intel_renderbuffer *irb,
 410                      struct gl_texture_image *texImage)
 411 {
 412    gl_format texFormat;
 413
 414    if (texImage->TexFormat == MESA_FORMAT_ARGB8888) {
 415       irb->Base.DataType = GL_UNSIGNED_BYTE;
 416       DBG("Render to RGBA8 texture OK\n");
 417    }
 418    else if (texImage->TexFormat == MESA_FORMAT_XRGB8888) {
 419       irb->Base.DataType = GL_UNSIGNED_BYTE;
 420       DBG("Render to XGBA8 texture OK\n");
 421    }
 422    else if (texImage->TexFormat == MESA_FORMAT_RGB565) {
 423       irb->Base.DataType = GL_UNSIGNED_BYTE;
 424       DBG("Render to RGB5 texture OK\n");
 425    }
 426    else if (texImage->TexFormat == MESA_FORMAT_ARGB1555) {
 427       irb->Base.DataType = GL_UNSIGNED_BYTE;
 428       DBG("Render to ARGB1555 texture OK\n");
 429    }
 430    else if (texImage->TexFormat == MESA_FORMAT_ARGB4444) {
 431       irb->Base.DataType = GL_UNSIGNED_BYTE;
 432       DBG("Render to ARGB4444 texture OK\n");
 433    }
 434    else if (texImage->TexFormat == MESA_FORMAT_Z16) {
 435       irb->Base.DataType = GL_UNSIGNED_SHORT;
 436       DBG("Render to DEPTH16 texture OK\n");
 437    }
 438    else if (texImage->TexFormat == MESA_FORMAT_S8_Z24) {
 439       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 440       DBG("Render to DEPTH_STENCIL texture OK\n");
 441    }
 442    else {
 443       DBG("Render to texture BAD FORMAT %d\n", texImage->TexFormat);
 444       return GL_FALSE;
 445    }
 446
 447    irb->Base.Format = texImage->TexFormat;
 448
 449    texFormat = texImage->TexFormat;
 450
 451    irb->Base.InternalFormat = texImage->InternalFormat;
 452    irb->Base._BaseFormat = _mesa_base_fbo_format(ctx, irb->Base.InternalFormat);
 453    irb->Base.Width = texImage->Width;
 454    irb->Base.Height = texImage->Height;
 455
 456    irb->Base.Delete = intel_delete_renderbuffer;
 457    irb->Base.AllocStorage = intel_nop_alloc_storage;
 458
 459    return GL_TRUE;
 460 }
 461
 462
 463 /**
 464  * When glFramebufferTexture[123]D is called this function sets up the
 465  * gl_renderbuffer wrapper around the texture image.
 466  * This will have the region info needed for hardware rendering.
 467  */
 468 static struct intel_renderbuffer *
 469 intel_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
 470 {
 471    const GLuint name = ~0;   /* not significant, but distinct for debugging */
 472    struct intel_renderbuffer *irb;
 473
 474    /* make an intel_renderbuffer to wrap the texture image */
 475    irb = CALLOC_STRUCT(intel_renderbuffer);
 476    if (!irb) {
 477       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
 478       return NULL;
 479    }
 480
 481    _mesa_init_renderbuffer(&irb->Base, name);
 482    irb->Base.ClassID = INTEL_RB_CLASS;
 483
 484    if (!intel_update_wrapper(ctx, irb, texImage)) {
 485       _mesa_free(irb);
 486       return NULL;
 487    }
 488
 489    return irb;
 490 }
 491
 492
 493 /**
 494  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 495  * prepare for rendering into texture memory.  This might be called
 496  * many times to choose different texture levels, cube faces, etc
 497  * before intel_finish_render_texture() is ever called.
 498  */
 499 static void
 500 intel_render_texture(GLcontext * ctx,
 501                      struct gl_framebuffer *fb,
 502                      struct gl_renderbuffer_attachment *att)
 503 {
 504    struct gl_texture_image *newImage
 505       = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 506    struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
 507    struct intel_texture_image *intel_image;
 508    GLuint dst_x, dst_y;
 509
 510    (void) fb;
 511
 512    ASSERT(newImage);
 513
 514    intel_image = intel_texture_image(newImage);
 515    if (!intel_image->mt) {
 516       /* Fallback on drawing to a texture that doesn't have a miptree
 517        * (has a border, width/height 0, etc.)
 518        */
 519       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 520       _mesa_render_texture(ctx, fb, att);
 521       return;
 522    }
 523    else if (!irb) {
 524       irb = intel_wrap_texture(ctx, newImage);
 525       if (irb) {
 526          /* bind the wrapper to the attachment point */
 527          _mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base);
 528       }
 529       else {
 530          /* fallback to software rendering */
 531          _mesa_render_texture(ctx, fb, att);
 532          return;
 533       }
 534    }
 535
 536    if (!intel_update_wrapper(ctx, irb, newImage)) {
 537        _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 538        _mesa_render_texture(ctx, fb, att);
 539        return;
 540    }
 541
 542    DBG("Begin render texture tid %x tex=%u w=%d h=%d refcount=%d\n",
 543        _glthread_GetID(),
 544        att->Texture->Name, newImage->Width, newImage->Height,
 545        irb->Base.RefCount);
 546
 547    /* point the renderbufer's region to the texture image region */
 548    if (irb->region != intel_image->mt->region) {
 549       if (irb->region)
 550          intel_region_release(&irb->region);
 551       intel_region_reference(&irb->region, intel_image->mt->region);
 552    }
 553
 554    /* compute offset of the particular 2D image within the texture region */
 555    intel_miptree_get_image_offset(intel_image->mt,
 556                                   att->TextureLevel,
 557                                   att->CubeMapFace,
 558                                   att->Zoffset,
 559                                   &dst_x, &dst_y);
 560
 561    intel_image->mt->region->draw_offset = (dst_y * intel_image->mt->pitch +
 562                                            dst_x) * intel_image->mt->cpp;
 563    intel_image->mt->region->draw_x = dst_x;
 564    intel_image->mt->region->draw_y = dst_y;
 565    intel_image->used_as_render_target = GL_TRUE;
 566
 567    /* update drawing region, etc */
 568    intel_draw_buffer(ctx, fb);
 569 }
 570
 571
 572 /**
 573  * Called by Mesa when rendering to a texture is done.
 574  */
 575 static void
 576 intel_finish_render_texture(GLcontext * ctx,
 577                             struct gl_renderbuffer_attachment *att)
 578 {
 579    struct intel_context *intel = intel_context(ctx);
 580    struct gl_texture_object *tex_obj = att->Texture;
 581    struct gl_texture_image *image =
 582       tex_obj->Image[att->CubeMapFace][att->TextureLevel];
 583    struct intel_texture_image *intel_image = intel_texture_image(image);
 584
 585    /* Flag that this image may now be validated into the object's miptree. */
 586    intel_image->used_as_render_target = GL_FALSE;
 587
 588    /* Since we've (probably) rendered to the texture and will (likely) use
 589     * it in the texture domain later on in this batchbuffer, flush the
 590     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 591     * usage inside of a batchbuffer like GEM does in the kernel.
 592     */
 593    intel_batchbuffer_emit_mi_flush(intel->batch);
 594 }
 595
 596 /**
 597  * Do additional "completeness" testing of a framebuffer object.
 598  */
 599 static void
 600 intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
 601 {
 602    const struct intel_renderbuffer *depthRb =
 603       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 604    const struct intel_renderbuffer *stencilRb =
 605       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 606    int i;
 607
 608    if (stencilRb && stencilRb != depthRb) {
 609       /* we only support combined depth/stencil buffers, not separate
 610        * stencil buffers.
 611        */
 612       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 613    }
 614
 615    for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 616       struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 617       struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 618
 619       if (rb == NULL)
 620          continue;
 621
 622       if (irb == NULL) {
 623          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 624          continue;
 625       }
 626
 627       switch (irb->Base.Format) {
 628       case MESA_FORMAT_ARGB8888:
 629       case MESA_FORMAT_XRGB8888:
 630       case MESA_FORMAT_RGB565:
 631       case MESA_FORMAT_ARGB1555:
 632       case MESA_FORMAT_ARGB4444:
 633          break;
 634       default:
 635          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 636       }
 637    }
 638 }
 639
 640
 641 /**
 642  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 643  * Hook in device driver functions.
 644  */
 645 void
 646 intel_fbo_init(struct intel_context *intel)
 647 {
 648    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 649    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 650    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
 651    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
 652    intel->ctx.Driver.RenderTexture = intel_render_texture;
 653    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 654    intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
 655    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 656    intel->ctx.Driver.BlitFramebuffer = _mesa_meta_BlitFramebuffer;
 657 }