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