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 (intel && irb->region) {
  74       intel_region_release(&irb->region);
  75    }
  76
  77    free(irb);
  78 }
  79
  80
  81 /**
  82  * Return a pointer to a specific pixel in a renderbuffer.
  83  */
  84 static void *
  85 intel_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb,
  86                   GLint x, GLint y)
  87 {
  88    /* By returning NULL we force all software rendering to go through
  89     * the span routines.
  90     */
  91    return NULL;
  92 }
  93
  94
  95 /**
  96  * Called via glRenderbufferStorageEXT() to set the format and allocate
  97  * storage for a user-created renderbuffer.
  98  */
  99 static GLboolean
 100 intel_alloc_renderbuffer_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 101                                  GLenum internalFormat,
 102                                  GLuint width, GLuint height)
 103 {
 104    struct intel_context *intel = intel_context(ctx);
 105    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 106    int cpp;
 107
 108    ASSERT(rb->Name != 0);
 109
 110    switch (internalFormat) {
 111    case GL_R3_G3_B2:
 112    case GL_RGB4:
 113    case GL_RGB5:
 114       rb->Format = MESA_FORMAT_RGB565;
 115       rb->DataType = GL_UNSIGNED_BYTE;
 116       break;
 117    case GL_RGB:
 118    case GL_RGB8:
 119    case GL_RGB10:
 120    case GL_RGB12:
 121    case GL_RGB16:
 122       rb->Format = MESA_FORMAT_XRGB8888;
 123       rb->DataType = GL_UNSIGNED_BYTE;
 124       break;
 125    case GL_RGBA:
 126    case GL_RGBA2:
 127    case GL_RGBA4:
 128    case GL_RGB5_A1:
 129    case GL_RGBA8:
 130    case GL_RGB10_A2:
 131    case GL_RGBA12:
 132    case GL_RGBA16:
 133       rb->Format = MESA_FORMAT_ARGB8888;
 134       rb->DataType = GL_UNSIGNED_BYTE;
 135       break;
 136    case GL_STENCIL_INDEX:
 137    case GL_STENCIL_INDEX1_EXT:
 138    case GL_STENCIL_INDEX4_EXT:
 139    case GL_STENCIL_INDEX8_EXT:
 140    case GL_STENCIL_INDEX16_EXT:
 141       /* alloc a depth+stencil buffer */
 142       rb->Format = MESA_FORMAT_S8_Z24;
 143       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 144       break;
 145    case GL_DEPTH_COMPONENT16:
 146       rb->Format = MESA_FORMAT_Z16;
 147       rb->DataType = GL_UNSIGNED_SHORT;
 148       break;
 149    case GL_DEPTH_COMPONENT:
 150    case GL_DEPTH_COMPONENT24:
 151    case GL_DEPTH_COMPONENT32:
 152       rb->Format = MESA_FORMAT_S8_Z24;
 153       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 154       break;
 155    case GL_DEPTH_STENCIL_EXT:
 156    case GL_DEPTH24_STENCIL8_EXT:
 157       rb->Format = MESA_FORMAT_S8_Z24;
 158       rb->DataType = GL_UNSIGNED_INT_24_8_EXT;
 159       break;
 160    default:
 161       _mesa_problem(ctx,
 162                     "Unexpected format in intel_alloc_renderbuffer_storage");
 163       return GL_FALSE;
 164    }
 165
 166    rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 167    cpp = _mesa_get_format_bytes(rb->Format);
 168
 169    intelFlush(ctx);
 170
 171    /* free old region */
 172    if (irb->region) {
 173       intel_region_release(&irb->region);
 174    }
 175
 176    /* allocate new memory region/renderbuffer */
 177
 178    /* alloc hardware renderbuffer */
 179    DBG("Allocating %d x %d Intel RBO\n", width, height);
 180
 181    irb->region = intel_region_alloc(intel, I915_TILING_NONE, cpp,
 182                                     width, height, GL_TRUE);
 183    if (!irb->region)
 184       return GL_FALSE;       /* out of memory? */
 185
 186    ASSERT(irb->region->buffer);
 187
 188    rb->Width = width;
 189    rb->Height = height;
 190
 191    return GL_TRUE;
 192 }
 193
 194
 195 #if FEATURE_OES_EGL_image
 196 static void
 197 intel_image_target_renderbuffer_storage(GLcontext *ctx,
 198                                         struct gl_renderbuffer *rb,
 199                                         void *image_handle)
 200 {
 201    struct intel_context *intel = intel_context(ctx);
 202    struct intel_renderbuffer *irb;
 203    __DRIscreen *screen;
 204    __DRIimage *image;
 205
 206    screen = intel->intelScreen->driScrnPriv;
 207    image = screen->dri2.image->lookupEGLImage(intel->driContext, image_handle,
 208                                               intel->driContext->loaderPrivate);
 209    if (image == NULL)
 210       return;
 211
 212    irb = intel_renderbuffer(rb);
 213    if (irb->region)
 214       intel_region_release(&irb->region);
 215    intel_region_reference(&irb->region, image->region);
 216
 217    rb->InternalFormat = image->internal_format;
 218    rb->Width = image->region->width;
 219    rb->Height = image->region->height;
 220    rb->Format = image->format;
 221    rb->DataType = image->data_type;
 222    rb->_BaseFormat = _mesa_base_fbo_format(&intel->ctx,
 223                                            image->internal_format);
 224 }
 225 #endif
 226
 227 /**
 228  * Called for each hardware renderbuffer when a _window_ is resized.
 229  * Just update fields.
 230  * Not used for user-created renderbuffers!
 231  */
 232 static GLboolean
 233 intel_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 234                            GLenum internalFormat, GLuint width, GLuint height)
 235 {
 236    ASSERT(rb->Name == 0);
 237    rb->Width = width;
 238    rb->Height = height;
 239    rb->InternalFormat = internalFormat;
 240
 241    return GL_TRUE;
 242 }
 243
 244
 245 static void
 246 intel_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
 247                      GLuint width, GLuint height)
 248 {
 249    int i;
 250
 251    _mesa_resize_framebuffer(ctx, fb, width, height);
 252
 253    fb->Initialized = GL_TRUE; /* XXX remove someday */
 254
 255    if (fb->Name != 0) {
 256       return;
 257    }
 258
 259
 260    /* Make sure all window system renderbuffers are up to date */
 261    for (i = BUFFER_FRONT_LEFT; i <= BUFFER_BACK_RIGHT; i++) {
 262       struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
 263
 264       /* only resize if size is changing */
 265       if (rb && (rb->Width != width || rb->Height != height)) {
 266          rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
 267       }
 268    }
 269 }
 270
 271
 272 /** Dummy function for gl_renderbuffer::AllocStorage() */
 273 static GLboolean
 274 intel_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 275                         GLenum internalFormat, GLuint width, GLuint height)
 276 {
 277    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 278    return GL_FALSE;
 279 }
 280
 281
 282 void
 283 intel_renderbuffer_set_region(struct intel_renderbuffer *rb,
 284                               struct intel_region *region)
 285 {
 286    struct intel_region *old;
 287
 288    old = rb->region;
 289    rb->region = NULL;
 290    intel_region_reference(&rb->region, region);
 291    intel_region_release(&old);
 292 }
 293
 294
 295 /**
 296  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 297  * not a user-created renderbuffer.
 298  */
 299 struct intel_renderbuffer *
 300 intel_create_renderbuffer(gl_format format)
 301 {
 302    GET_CURRENT_CONTEXT(ctx);
 303
 304    struct intel_renderbuffer *irb;
 305
 306    irb = CALLOC_STRUCT(intel_renderbuffer);
 307    if (!irb) {
 308       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 309       return NULL;
 310    }
 311
 312    _mesa_init_renderbuffer(&irb->Base, 0);
 313    irb->Base.ClassID = INTEL_RB_CLASS;
 314
 315    switch (format) {
 316    case MESA_FORMAT_RGB565:
 317       irb->Base._BaseFormat = GL_RGB;
 318       irb->Base.DataType = GL_UNSIGNED_BYTE;
 319       break;
 320    case MESA_FORMAT_XRGB8888:
 321       irb->Base._BaseFormat = GL_RGB;
 322       irb->Base.DataType = GL_UNSIGNED_BYTE;
 323       break;
 324    case MESA_FORMAT_ARGB8888:
 325       irb->Base._BaseFormat = GL_RGBA;
 326       irb->Base.DataType = GL_UNSIGNED_BYTE;
 327       break;
 328    case MESA_FORMAT_Z16:
 329       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 330       irb->Base.DataType = GL_UNSIGNED_SHORT;
 331       break;
 332    case MESA_FORMAT_X8_Z24:
 333       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 334       irb->Base.DataType = GL_UNSIGNED_INT;
 335       break;
 336    case MESA_FORMAT_S8_Z24:
 337       irb->Base._BaseFormat = GL_DEPTH_STENCIL;
 338       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 339       break;
 340    default:
 341       _mesa_problem(NULL,
 342                     "Unexpected intFormat in intel_create_renderbuffer");
 343       free(irb);
 344       return NULL;
 345    }
 346
 347    irb->Base.Format = format;
 348    irb->Base.InternalFormat = irb->Base._BaseFormat;
 349
 350    /* intel-specific methods */
 351    irb->Base.Delete = intel_delete_renderbuffer;
 352    irb->Base.AllocStorage = intel_alloc_window_storage;
 353    irb->Base.GetPointer = intel_get_pointer;
 354
 355    return irb;
 356 }
 357
 358
 359 /**
 360  * Create a new renderbuffer object.
 361  * Typically called via glBindRenderbufferEXT().
 362  */
 363 static struct gl_renderbuffer *
 364 intel_new_renderbuffer(GLcontext * ctx, GLuint name)
 365 {
 366    /*struct intel_context *intel = intel_context(ctx); */
 367    struct intel_renderbuffer *irb;
 368
 369    irb = CALLOC_STRUCT(intel_renderbuffer);
 370    if (!irb) {
 371       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 372       return NULL;
 373    }
 374
 375    _mesa_init_renderbuffer(&irb->Base, name);
 376    irb->Base.ClassID = INTEL_RB_CLASS;
 377
 378    /* intel-specific methods */
 379    irb->Base.Delete = intel_delete_renderbuffer;
 380    irb->Base.AllocStorage = intel_alloc_renderbuffer_storage;
 381    irb->Base.GetPointer = intel_get_pointer;
 382    /* span routines set in alloc_storage function */
 383
 384    return &irb->Base;
 385 }
 386
 387
 388 /**
 389  * Called via glBindFramebufferEXT().
 390  */
 391 static void
 392 intel_bind_framebuffer(GLcontext * ctx, GLenum target,
 393                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 394 {
 395    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 396       intel_draw_buffer(ctx, fb);
 397    }
 398    else {
 399       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 400    }
 401 }
 402
 403
 404 /**
 405  * Called via glFramebufferRenderbufferEXT().
 406  */
 407 static void
 408 intel_framebuffer_renderbuffer(GLcontext * ctx,
 409                                struct gl_framebuffer *fb,
 410                                GLenum attachment, struct gl_renderbuffer *rb)
 411 {
 412    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
 413
 414    intelFlush(ctx);
 415
 416    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 417    intel_draw_buffer(ctx, fb);
 418 }
 419
 420
 421 static GLboolean
 422 intel_update_wrapper(GLcontext *ctx, struct intel_renderbuffer *irb,
 423                      struct gl_texture_image *texImage)
 424 {
 425    if (texImage->TexFormat == MESA_FORMAT_ARGB8888) {
 426       irb->Base.DataType = GL_UNSIGNED_BYTE;
 427       DBG("Render to RGBA8 texture OK\n");
 428    }
 429    else if (texImage->TexFormat == MESA_FORMAT_XRGB8888) {
 430       irb->Base.DataType = GL_UNSIGNED_BYTE;
 431       DBG("Render to XGBA8 texture OK\n");
 432    }
 433    else if (texImage->TexFormat == MESA_FORMAT_RGB565) {
 434       irb->Base.DataType = GL_UNSIGNED_BYTE;
 435       DBG("Render to RGB5 texture OK\n");
 436    }
 437    else if (texImage->TexFormat == MESA_FORMAT_ARGB1555) {
 438       irb->Base.DataType = GL_UNSIGNED_BYTE;
 439       DBG("Render to ARGB1555 texture OK\n");
 440    }
 441    else if (texImage->TexFormat == MESA_FORMAT_ARGB4444) {
 442       irb->Base.DataType = GL_UNSIGNED_BYTE;
 443       DBG("Render to ARGB4444 texture OK\n");
 444    }
 445    else if (texImage->TexFormat == MESA_FORMAT_Z16) {
 446       irb->Base.DataType = GL_UNSIGNED_SHORT;
 447       DBG("Render to DEPTH16 texture OK\n");
 448    }
 449    else if (texImage->TexFormat == MESA_FORMAT_S8_Z24) {
 450       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 451       DBG("Render to DEPTH_STENCIL texture OK\n");
 452    }
 453    else {
 454       DBG("Render to texture BAD FORMAT %s\n",
 455           _mesa_get_format_name(texImage->TexFormat));
 456       return GL_FALSE;
 457    }
 458
 459    irb->Base.Format = texImage->TexFormat;
 460
 461    irb->Base.InternalFormat = texImage->InternalFormat;
 462    irb->Base._BaseFormat = _mesa_base_fbo_format(ctx, irb->Base.InternalFormat);
 463    irb->Base.Width = texImage->Width;
 464    irb->Base.Height = texImage->Height;
 465
 466    irb->Base.Delete = intel_delete_renderbuffer;
 467    irb->Base.AllocStorage = intel_nop_alloc_storage;
 468
 469    return GL_TRUE;
 470 }
 471
 472
 473 /**
 474  * When glFramebufferTexture[123]D is called this function sets up the
 475  * gl_renderbuffer wrapper around the texture image.
 476  * This will have the region info needed for hardware rendering.
 477  */
 478 static struct intel_renderbuffer *
 479 intel_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
 480 {
 481    const GLuint name = ~0;   /* not significant, but distinct for debugging */
 482    struct intel_renderbuffer *irb;
 483
 484    /* make an intel_renderbuffer to wrap the texture image */
 485    irb = CALLOC_STRUCT(intel_renderbuffer);
 486    if (!irb) {
 487       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
 488       return NULL;
 489    }
 490
 491    _mesa_init_renderbuffer(&irb->Base, name);
 492    irb->Base.ClassID = INTEL_RB_CLASS;
 493
 494    if (!intel_update_wrapper(ctx, irb, texImage)) {
 495       free(irb);
 496       return NULL;
 497    }
 498
 499    return irb;
 500 }
 501
 502
 503 /**
 504  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 505  * prepare for rendering into texture memory.  This might be called
 506  * many times to choose different texture levels, cube faces, etc
 507  * before intel_finish_render_texture() is ever called.
 508  */
 509 static void
 510 intel_render_texture(GLcontext * ctx,
 511                      struct gl_framebuffer *fb,
 512                      struct gl_renderbuffer_attachment *att)
 513 {
 514    struct gl_texture_image *newImage
 515       = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 516    struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
 517    struct intel_texture_image *intel_image;
 518    GLuint dst_x, dst_y;
 519
 520    (void) fb;
 521
 522    ASSERT(newImage);
 523
 524    intel_image = intel_texture_image(newImage);
 525    if (!intel_image->mt) {
 526       /* Fallback on drawing to a texture that doesn't have a miptree
 527        * (has a border, width/height 0, etc.)
 528        */
 529       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 530       _mesa_render_texture(ctx, fb, att);
 531       return;
 532    }
 533    else if (!irb) {
 534       irb = intel_wrap_texture(ctx, newImage);
 535       if (irb) {
 536          /* bind the wrapper to the attachment point */
 537          _mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base);
 538       }
 539       else {
 540          /* fallback to software rendering */
 541          _mesa_render_texture(ctx, fb, att);
 542          return;
 543       }
 544    }
 545
 546    if (!intel_update_wrapper(ctx, irb, newImage)) {
 547        _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 548        _mesa_render_texture(ctx, fb, att);
 549        return;
 550    }
 551
 552    DBG("Begin render texture tid %lx tex=%u w=%d h=%d refcount=%d\n",
 553        _glthread_GetID(),
 554        att->Texture->Name, newImage->Width, newImage->Height,
 555        irb->Base.RefCount);
 556
 557    /* point the renderbufer's region to the texture image region */
 558    if (irb->region != intel_image->mt->region) {
 559       if (irb->region)
 560          intel_region_release(&irb->region);
 561       intel_region_reference(&irb->region, intel_image->mt->region);
 562    }
 563
 564    /* compute offset of the particular 2D image within the texture region */
 565    intel_miptree_get_image_offset(intel_image->mt,
 566                                   att->TextureLevel,
 567                                   att->CubeMapFace,
 568                                   att->Zoffset,
 569                                   &dst_x, &dst_y);
 570
 571    intel_image->mt->region->draw_offset = (dst_y * intel_image->mt->region->pitch +
 572                                            dst_x) * intel_image->mt->cpp;
 573    intel_image->mt->region->draw_x = dst_x;
 574    intel_image->mt->region->draw_y = dst_y;
 575    intel_image->used_as_render_target = GL_TRUE;
 576
 577    /* update drawing region, etc */
 578    intel_draw_buffer(ctx, fb);
 579 }
 580
 581
 582 /**
 583  * Called by Mesa when rendering to a texture is done.
 584  */
 585 static void
 586 intel_finish_render_texture(GLcontext * ctx,
 587                             struct gl_renderbuffer_attachment *att)
 588 {
 589    struct intel_context *intel = intel_context(ctx);
 590    struct gl_texture_object *tex_obj = att->Texture;
 591    struct gl_texture_image *image =
 592       tex_obj->Image[att->CubeMapFace][att->TextureLevel];
 593    struct intel_texture_image *intel_image = intel_texture_image(image);
 594
 595    /* Flag that this image may now be validated into the object's miptree. */
 596    intel_image->used_as_render_target = GL_FALSE;
 597
 598    /* Since we've (probably) rendered to the texture and will (likely) use
 599     * it in the texture domain later on in this batchbuffer, flush the
 600     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 601     * usage inside of a batchbuffer like GEM does in the kernel.
 602     */
 603    intel_batchbuffer_emit_mi_flush(intel->batch);
 604 }
 605
 606 /**
 607  * Do additional "completeness" testing of a framebuffer object.
 608  */
 609 static void
 610 intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
 611 {
 612    const struct intel_renderbuffer *depthRb =
 613       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 614    const struct intel_renderbuffer *stencilRb =
 615       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 616    int i;
 617
 618    if (depthRb && stencilRb && stencilRb != depthRb) {
 619       if (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Type == GL_TEXTURE &&
 620           ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Type == GL_TEXTURE &&
 621           (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Texture->Name ==
 622            ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Texture->Name)) {
 623          /* OK */
 624       } else {
 625          /* we only support combined depth/stencil buffers, not separate
 626           * stencil buffers.
 627           */
 628          DBG("Only supports combined depth/stencil (found %s, %s)\n",
 629              depthRb ? _mesa_get_format_name(depthRb->Base.Format): "NULL",
 630              stencilRb ? _mesa_get_format_name(stencilRb->Base.Format): "NULL");
 631          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 632       }
 633    }
 634
 635    for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 636       struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 637       struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 638
 639       if (rb == NULL)
 640          continue;
 641
 642       if (irb == NULL) {
 643          DBG("software rendering renderbuffer\n");
 644          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 645          continue;
 646       }
 647
 648       switch (irb->Base.Format) {
 649       case MESA_FORMAT_ARGB8888:
 650       case MESA_FORMAT_XRGB8888:
 651       case MESA_FORMAT_RGB565:
 652       case MESA_FORMAT_ARGB1555:
 653       case MESA_FORMAT_ARGB4444:
 654          break;
 655       default:
 656          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 657       }
 658    }
 659 }
 660
 661
 662 /**
 663  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 664  * Hook in device driver functions.
 665  */
 666 void
 667 intel_fbo_init(struct intel_context *intel)
 668 {
 669    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 670    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 671    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
 672    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
 673    intel->ctx.Driver.RenderTexture = intel_render_texture;
 674    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 675    intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
 676    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 677    intel->ctx.Driver.BlitFramebuffer = _mesa_meta_BlitFramebuffer;
 678
 679 #if FEATURE_OES_EGL_image
 680    intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
 681       intel_image_target_renderbuffer_storage;
 682 #endif
 683 }