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