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    GLboolean softwareBuffer = GL_FALSE;
 110    int cpp;
 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    if (softwareBuffer) {
 188       return _mesa_soft_renderbuffer_storage(ctx, rb, internalFormat,
 189                                              width, height);
 190    }
 191    else {
 192       /* Choose a pitch to match hardware requirements:
 193        */
 194       GLuint pitch = ((cpp * width + 63) & ~63) / cpp;
 195
 196       /* alloc hardware renderbuffer */
 197       DBG("Allocating %d x %d Intel RBO (pitch %d)\n", width,
 198           height, pitch);
 199
 200       irb->region = intel_region_alloc(intel, I915_TILING_NONE,
 201                                        cpp, width, height, pitch,
 202                                        GL_TRUE);
 203       if (!irb->region)
 204          return GL_FALSE;       /* out of memory? */
 205
 206       ASSERT(irb->region->buffer);
 207
 208       rb->Width = width;
 209       rb->Height = height;
 210
 211       return GL_TRUE;
 212    }
 213 }
 214
 215
 216 /**
 217  * Called for each hardware renderbuffer when a _window_ is resized.
 218  * Just update fields.
 219  * Not used for user-created renderbuffers!
 220  */
 221 static GLboolean
 222 intel_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 223                            GLenum internalFormat, GLuint width, GLuint height)
 224 {
 225    ASSERT(rb->Name == 0);
 226    rb->Width = width;
 227    rb->Height = height;
 228    rb->InternalFormat = internalFormat;
 229
 230    return GL_TRUE;
 231 }
 232
 233
 234 static void
 235 intel_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
 236                      GLuint width, GLuint height)
 237 {
 238    struct intel_framebuffer *intel_fb = (struct intel_framebuffer*)fb;
 239    int i;
 240
 241    _mesa_resize_framebuffer(ctx, fb, width, height);
 242
 243    fb->Initialized = GL_TRUE; /* XXX remove someday */
 244
 245    if (fb->Name != 0) {
 246       return;
 247    }
 248
 249    /* Make sure all window system renderbuffers are up to date */
 250    for (i = 0; i < 2; i++) {
 251       struct gl_renderbuffer *rb = &intel_fb->color_rb[i]->Base;
 252
 253       /* only resize if size is changing */
 254       if (rb && (rb->Width != width || rb->Height != height)) {
 255          rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
 256       }
 257    }
 258 }
 259
 260
 261 /** Dummy function for gl_renderbuffer::AllocStorage() */
 262 static GLboolean
 263 intel_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 264                         GLenum internalFormat, GLuint width, GLuint height)
 265 {
 266    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 267    return GL_FALSE;
 268 }
 269
 270
 271 void
 272 intel_renderbuffer_set_region(struct intel_renderbuffer *rb,
 273                               struct intel_region *region)
 274 {
 275    struct intel_region *old;
 276
 277    old = rb->region;
 278    rb->region = NULL;
 279    intel_region_reference(&rb->region, region);
 280    intel_region_release(&old);
 281 }
 282
 283
 284 /**
 285  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 286  * not a user-created renderbuffer.
 287  */
 288 struct intel_renderbuffer *
 289 intel_create_renderbuffer(gl_format format)
 290 {
 291    GET_CURRENT_CONTEXT(ctx);
 292
 293    struct intel_renderbuffer *irb;
 294    const GLuint name = 0;
 295
 296    irb = CALLOC_STRUCT(intel_renderbuffer);
 297    if (!irb) {
 298       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 299       return NULL;
 300    }
 301
 302    _mesa_init_renderbuffer(&irb->Base, name);
 303    irb->Base.ClassID = INTEL_RB_CLASS;
 304
 305    switch (format) {
 306    case MESA_FORMAT_RGB565:
 307       irb->Base._BaseFormat = GL_RGB;
 308       irb->Base.DataType = GL_UNSIGNED_BYTE;
 309       break;
 310    case MESA_FORMAT_XRGB8888:
 311       /* XXX this is a hack since XRGB surfaces don't seem to work
 312        * properly yet.  Reading the alpha channel returns 0 instead of 1.
 313        */
 314       format = MESA_FORMAT_ARGB8888;
 315       irb->Base._BaseFormat = GL_RGB;
 316       irb->Base.DataType = GL_UNSIGNED_BYTE;
 317       break;
 318    case MESA_FORMAT_ARGB8888:
 319       irb->Base._BaseFormat = GL_RGBA;
 320       irb->Base.DataType = GL_UNSIGNED_BYTE;
 321       break;
 322    case MESA_FORMAT_Z16:
 323       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 324       irb->Base.DataType = GL_UNSIGNED_SHORT;
 325       break;
 326    case MESA_FORMAT_X8_Z24:
 327       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 328       irb->Base.DataType = GL_UNSIGNED_INT;
 329       break;
 330    case MESA_FORMAT_S8_Z24:
 331       irb->Base._BaseFormat = GL_DEPTH_STENCIL;
 332       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 333       break;
 334    default:
 335       _mesa_problem(NULL,
 336                     "Unexpected intFormat in intel_create_renderbuffer");
 337       _mesa_free(irb);
 338       return NULL;
 339    }
 340
 341    irb->Base.Format = format;
 342    irb->Base.InternalFormat = irb->Base._BaseFormat;
 343
 344    /* intel-specific methods */
 345    irb->Base.Delete = intel_delete_renderbuffer;
 346    irb->Base.AllocStorage = intel_alloc_window_storage;
 347    irb->Base.GetPointer = intel_get_pointer;
 348
 349    return irb;
 350 }
 351
 352
 353 /**
 354  * Create a new renderbuffer object.
 355  * Typically called via glBindRenderbufferEXT().
 356  */
 357 static struct gl_renderbuffer *
 358 intel_new_renderbuffer(GLcontext * ctx, GLuint name)
 359 {
 360    /*struct intel_context *intel = intel_context(ctx); */
 361    struct intel_renderbuffer *irb;
 362
 363    irb = CALLOC_STRUCT(intel_renderbuffer);
 364    if (!irb) {
 365       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 366       return NULL;
 367    }
 368
 369    _mesa_init_renderbuffer(&irb->Base, name);
 370    irb->Base.ClassID = INTEL_RB_CLASS;
 371
 372    /* intel-specific methods */
 373    irb->Base.Delete = intel_delete_renderbuffer;
 374    irb->Base.AllocStorage = intel_alloc_renderbuffer_storage;
 375    irb->Base.GetPointer = intel_get_pointer;
 376    /* span routines set in alloc_storage function */
 377
 378    return &irb->Base;
 379 }
 380
 381
 382 /**
 383  * Called via glBindFramebufferEXT().
 384  */
 385 static void
 386 intel_bind_framebuffer(GLcontext * ctx, GLenum target,
 387                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 388 {
 389    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 390       intel_draw_buffer(ctx, fb);
 391    }
 392    else {
 393       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 394    }
 395 }
 396
 397
 398 /**
 399  * Called via glFramebufferRenderbufferEXT().
 400  */
 401 static void
 402 intel_framebuffer_renderbuffer(GLcontext * ctx,
 403                                struct gl_framebuffer *fb,
 404                                GLenum attachment, struct gl_renderbuffer *rb)
 405 {
 406    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
 407
 408    intelFlush(ctx);
 409
 410    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 411    intel_draw_buffer(ctx, fb);
 412 }
 413
 414
 415 static GLboolean
 416 intel_update_wrapper(GLcontext *ctx, struct intel_renderbuffer *irb,
 417                      struct gl_texture_image *texImage)
 418 {
 419    gl_format texFormat;
 420
 421    if (texImage->TexFormat == MESA_FORMAT_ARGB8888) {
 422       irb->Base.DataType = GL_UNSIGNED_BYTE;
 423       DBG("Render to RGBA8 texture OK\n");
 424    }
 425    else if (texImage->TexFormat == MESA_FORMAT_XRGB8888) {
 426       irb->Base.DataType = GL_UNSIGNED_BYTE;
 427       DBG("Render to XGBA8 texture OK\n");
 428    }
 429    else if (texImage->TexFormat == MESA_FORMAT_RGB565) {
 430       irb->Base.DataType = GL_UNSIGNED_BYTE;
 431       DBG("Render to RGB5 texture OK\n");
 432    }
 433    else if (texImage->TexFormat == MESA_FORMAT_ARGB1555) {
 434       irb->Base.DataType = GL_UNSIGNED_BYTE;
 435       DBG("Render to ARGB1555 texture OK\n");
 436    }
 437    else if (texImage->TexFormat == MESA_FORMAT_ARGB4444) {
 438       irb->Base.DataType = GL_UNSIGNED_BYTE;
 439       DBG("Render to ARGB4444 texture OK\n");
 440    }
 441    else if (texImage->TexFormat == MESA_FORMAT_Z16) {
 442       irb->Base.DataType = GL_UNSIGNED_SHORT;
 443       DBG("Render to DEPTH16 texture OK\n");
 444    }
 445    else if (texImage->TexFormat == MESA_FORMAT_S8_Z24) {
 446       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 447       DBG("Render to DEPTH_STENCIL texture OK\n");
 448    }
 449    else {
 450       DBG("Render to texture BAD FORMAT %d\n", texImage->TexFormat);
 451       return GL_FALSE;
 452    }
 453
 454    irb->Base.Format = texImage->TexFormat;
 455
 456    texFormat = texImage->TexFormat;
 457
 458    irb->Base.InternalFormat = texImage->InternalFormat;
 459    irb->Base._BaseFormat = _mesa_base_fbo_format(ctx, irb->Base.InternalFormat);
 460    irb->Base.Width = texImage->Width;
 461    irb->Base.Height = texImage->Height;
 462
 463    irb->Base.Delete = intel_delete_renderbuffer;
 464    irb->Base.AllocStorage = intel_nop_alloc_storage;
 465
 466    return GL_TRUE;
 467 }
 468
 469
 470 /**
 471  * When glFramebufferTexture[123]D is called this function sets up the
 472  * gl_renderbuffer wrapper around the texture image.
 473  * This will have the region info needed for hardware rendering.
 474  */
 475 static struct intel_renderbuffer *
 476 intel_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
 477 {
 478    const GLuint name = ~0;   /* not significant, but distinct for debugging */
 479    struct intel_renderbuffer *irb;
 480
 481    /* make an intel_renderbuffer to wrap the texture image */
 482    irb = CALLOC_STRUCT(intel_renderbuffer);
 483    if (!irb) {
 484       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
 485       return NULL;
 486    }
 487
 488    _mesa_init_renderbuffer(&irb->Base, name);
 489    irb->Base.ClassID = INTEL_RB_CLASS;
 490
 491    if (!intel_update_wrapper(ctx, irb, texImage)) {
 492       _mesa_free(irb);
 493       return NULL;
 494    }
 495
 496    return irb;
 497 }
 498
 499
 500 /**
 501  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 502  * prepare for rendering into texture memory.  This might be called
 503  * many times to choose different texture levels, cube faces, etc
 504  * before intel_finish_render_texture() is ever called.
 505  */
 506 static void
 507 intel_render_texture(GLcontext * ctx,
 508                      struct gl_framebuffer *fb,
 509                      struct gl_renderbuffer_attachment *att)
 510 {
 511    struct gl_texture_image *newImage
 512       = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 513    struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
 514    struct intel_texture_image *intel_image;
 515    GLuint dst_x, dst_y;
 516
 517    (void) fb;
 518
 519    ASSERT(newImage);
 520
 521    intel_image = intel_texture_image(newImage);
 522    if (!intel_image->mt) {
 523       /* Fallback on drawing to a texture that doesn't have a miptree
 524        * (has a border, width/height 0, etc.)
 525        */
 526       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 527       _mesa_render_texture(ctx, fb, att);
 528       return;
 529    }
 530    else if (!irb) {
 531       irb = intel_wrap_texture(ctx, newImage);
 532       if (irb) {
 533          /* bind the wrapper to the attachment point */
 534          _mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base);
 535       }
 536       else {
 537          /* fallback to software rendering */
 538          _mesa_render_texture(ctx, fb, att);
 539          return;
 540       }
 541    }
 542
 543    if (!intel_update_wrapper(ctx, irb, newImage)) {
 544        _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 545        _mesa_render_texture(ctx, fb, att);
 546        return;
 547    }
 548
 549    DBG("Begin render texture tid %x tex=%u w=%d h=%d refcount=%d\n",
 550        _glthread_GetID(),
 551        att->Texture->Name, newImage->Width, newImage->Height,
 552        irb->Base.RefCount);
 553
 554    /* point the renderbufer's region to the texture image region */
 555    if (irb->region != intel_image->mt->region) {
 556       if (irb->region)
 557          intel_region_release(&irb->region);
 558       intel_region_reference(&irb->region, intel_image->mt->region);
 559    }
 560
 561    /* compute offset of the particular 2D image within the texture region */
 562    intel_miptree_get_image_offset(intel_image->mt,
 563                                   att->TextureLevel,
 564                                   att->CubeMapFace,
 565                                   att->Zoffset,
 566                                   &dst_x, &dst_y);
 567
 568    intel_image->mt->region->draw_offset = (dst_y * intel_image->mt->pitch +
 569                                            dst_x) * intel_image->mt->cpp;
 570    intel_image->mt->region->draw_x = dst_x;
 571    intel_image->mt->region->draw_y = dst_y;
 572    intel_image->used_as_render_target = GL_TRUE;
 573
 574    /* update drawing region, etc */
 575    intel_draw_buffer(ctx, fb);
 576 }
 577
 578
 579 /**
 580  * Called by Mesa when rendering to a texture is done.
 581  */
 582 static void
 583 intel_finish_render_texture(GLcontext * ctx,
 584                             struct gl_renderbuffer_attachment *att)
 585 {
 586    struct intel_context *intel = intel_context(ctx);
 587    struct gl_texture_object *tex_obj = att->Texture;
 588    struct gl_texture_image *image =
 589       tex_obj->Image[att->CubeMapFace][att->TextureLevel];
 590    struct intel_texture_image *intel_image = intel_texture_image(image);
 591
 592    /* Flag that this image may now be validated into the object's miptree. */
 593    intel_image->used_as_render_target = GL_FALSE;
 594
 595    /* Since we've (probably) rendered to the texture and will (likely) use
 596     * it in the texture domain later on in this batchbuffer, flush the
 597     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 598     * usage inside of a batchbuffer like GEM does in the kernel.
 599     */
 600    intel_batchbuffer_emit_mi_flush(intel->batch);
 601 }
 602
 603 /**
 604  * Do additional "completeness" testing of a framebuffer object.
 605  */
 606 static void
 607 intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
 608 {
 609    const struct intel_renderbuffer *depthRb =
 610       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 611    const struct intel_renderbuffer *stencilRb =
 612       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 613    int i;
 614
 615    if (stencilRb && stencilRb != depthRb) {
 616       /* we only support combined depth/stencil buffers, not separate
 617        * stencil buffers.
 618        */
 619       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 620    }
 621
 622    for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 623       struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 624       struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 625
 626       if (rb == NULL)
 627          continue;
 628
 629       if (irb == NULL) {
 630          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 631          continue;
 632       }
 633
 634       switch (irb->Base.Format) {
 635       case MESA_FORMAT_ARGB8888:
 636       case MESA_FORMAT_XRGB8888:
 637       case MESA_FORMAT_RGB565:
 638       case MESA_FORMAT_ARGB1555:
 639       case MESA_FORMAT_ARGB4444:
 640          break;
 641       default:
 642          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 643       }
 644    }
 645 }
 646
 647
 648 /**
 649  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 650  * Hook in device driver functions.
 651  */
 652 void
 653 intel_fbo_init(struct intel_context *intel)
 654 {
 655    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 656    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 657    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
 658    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
 659    intel->ctx.Driver.RenderTexture = intel_render_texture;
 660    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 661    intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
 662    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 663    intel->ctx.Driver.BlitFramebuffer = _mesa_meta_BlitFramebuffer;
 664 }