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       free(irb->span_cache);
  75
  76    if (intel && irb->region) {
  77       intel_region_release(&irb->region);
  78    }
  79
  80    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 #if FEATURE_OES_EGL_image
 204 static void
 205 intel_image_target_renderbuffer_storage(GLcontext *ctx,
 206                                         struct gl_renderbuffer *rb,
 207                                         void *image_handle)
 208 {
 209    struct intel_context *intel = intel_context(ctx);
 210    struct intel_renderbuffer *irb;
 211    __DRIscreen *screen;
 212    __DRIimage *image;
 213
 214    screen = intel->intelScreen->driScrnPriv;
 215    image = screen->dri2.image->lookupEGLImage(intel->driContext, image_handle,
 216                                               intel->driContext->loaderPrivate);
 217    if (image == NULL)
 218       return;
 219
 220    irb = intel_renderbuffer(rb);
 221    if (irb->region)
 222       intel_region_release(&irb->region);
 223    intel_region_reference(&irb->region, image->region);
 224
 225    rb->Width = image->region->width;
 226    rb->Height = image->region->height;
 227    rb->Format = image->format;
 228    rb->DataType = image->data_type;
 229    rb->_BaseFormat = _mesa_base_fbo_format(&intel->ctx,
 230                                            image->internal_format);
 231 }
 232 #endif
 233
 234 /**
 235  * Called for each hardware renderbuffer when a _window_ is resized.
 236  * Just update fields.
 237  * Not used for user-created renderbuffers!
 238  */
 239 static GLboolean
 240 intel_alloc_window_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 241                            GLenum internalFormat, GLuint width, GLuint height)
 242 {
 243    ASSERT(rb->Name == 0);
 244    rb->Width = width;
 245    rb->Height = height;
 246    rb->InternalFormat = internalFormat;
 247
 248    return GL_TRUE;
 249 }
 250
 251
 252 static void
 253 intel_resize_buffers(GLcontext *ctx, struct gl_framebuffer *fb,
 254                      GLuint width, GLuint height)
 255 {
 256    int i;
 257
 258    _mesa_resize_framebuffer(ctx, fb, width, height);
 259
 260    fb->Initialized = GL_TRUE; /* XXX remove someday */
 261
 262    if (fb->Name != 0) {
 263       return;
 264    }
 265
 266
 267    /* Make sure all window system renderbuffers are up to date */
 268    for (i = BUFFER_FRONT_LEFT; i <= BUFFER_BACK_RIGHT; i++) {
 269       struct gl_renderbuffer *rb = fb->Attachment[i].Renderbuffer;
 270
 271       /* only resize if size is changing */
 272       if (rb && (rb->Width != width || rb->Height != height)) {
 273          rb->AllocStorage(ctx, rb, rb->InternalFormat, width, height);
 274       }
 275    }
 276 }
 277
 278
 279 /** Dummy function for gl_renderbuffer::AllocStorage() */
 280 static GLboolean
 281 intel_nop_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb,
 282                         GLenum internalFormat, GLuint width, GLuint height)
 283 {
 284    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
 285    return GL_FALSE;
 286 }
 287
 288
 289 void
 290 intel_renderbuffer_set_region(struct intel_renderbuffer *rb,
 291                               struct intel_region *region)
 292 {
 293    struct intel_region *old;
 294
 295    old = rb->region;
 296    rb->region = NULL;
 297    intel_region_reference(&rb->region, region);
 298    intel_region_release(&old);
 299 }
 300
 301
 302 /**
 303  * Create a new intel_renderbuffer which corresponds to an on-screen window,
 304  * not a user-created renderbuffer.
 305  */
 306 struct intel_renderbuffer *
 307 intel_create_renderbuffer(gl_format format)
 308 {
 309    GET_CURRENT_CONTEXT(ctx);
 310
 311    struct intel_renderbuffer *irb;
 312
 313    irb = CALLOC_STRUCT(intel_renderbuffer);
 314    if (!irb) {
 315       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 316       return NULL;
 317    }
 318
 319    _mesa_init_renderbuffer(&irb->Base, 0);
 320    irb->Base.ClassID = INTEL_RB_CLASS;
 321
 322    switch (format) {
 323    case MESA_FORMAT_RGB565:
 324       irb->Base._BaseFormat = GL_RGB;
 325       irb->Base.DataType = GL_UNSIGNED_BYTE;
 326       break;
 327    case MESA_FORMAT_XRGB8888:
 328       irb->Base._BaseFormat = GL_RGB;
 329       irb->Base.DataType = GL_UNSIGNED_BYTE;
 330       break;
 331    case MESA_FORMAT_ARGB8888:
 332       irb->Base._BaseFormat = GL_RGBA;
 333       irb->Base.DataType = GL_UNSIGNED_BYTE;
 334       break;
 335    case MESA_FORMAT_Z16:
 336       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 337       irb->Base.DataType = GL_UNSIGNED_SHORT;
 338       break;
 339    case MESA_FORMAT_X8_Z24:
 340       irb->Base._BaseFormat = GL_DEPTH_COMPONENT;
 341       irb->Base.DataType = GL_UNSIGNED_INT;
 342       break;
 343    case MESA_FORMAT_S8_Z24:
 344       irb->Base._BaseFormat = GL_DEPTH_STENCIL;
 345       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 346       break;
 347    default:
 348       _mesa_problem(NULL,
 349                     "Unexpected intFormat in intel_create_renderbuffer");
 350       free(irb);
 351       return NULL;
 352    }
 353
 354    irb->Base.Format = format;
 355    irb->Base.InternalFormat = irb->Base._BaseFormat;
 356
 357    /* intel-specific methods */
 358    irb->Base.Delete = intel_delete_renderbuffer;
 359    irb->Base.AllocStorage = intel_alloc_window_storage;
 360    irb->Base.GetPointer = intel_get_pointer;
 361
 362    return irb;
 363 }
 364
 365
 366 /**
 367  * Create a new renderbuffer object.
 368  * Typically called via glBindRenderbufferEXT().
 369  */
 370 static struct gl_renderbuffer *
 371 intel_new_renderbuffer(GLcontext * ctx, GLuint name)
 372 {
 373    /*struct intel_context *intel = intel_context(ctx); */
 374    struct intel_renderbuffer *irb;
 375
 376    irb = CALLOC_STRUCT(intel_renderbuffer);
 377    if (!irb) {
 378       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
 379       return NULL;
 380    }
 381
 382    _mesa_init_renderbuffer(&irb->Base, name);
 383    irb->Base.ClassID = INTEL_RB_CLASS;
 384
 385    /* intel-specific methods */
 386    irb->Base.Delete = intel_delete_renderbuffer;
 387    irb->Base.AllocStorage = intel_alloc_renderbuffer_storage;
 388    irb->Base.GetPointer = intel_get_pointer;
 389    /* span routines set in alloc_storage function */
 390
 391    return &irb->Base;
 392 }
 393
 394
 395 /**
 396  * Called via glBindFramebufferEXT().
 397  */
 398 static void
 399 intel_bind_framebuffer(GLcontext * ctx, GLenum target,
 400                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
 401 {
 402    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
 403       intel_draw_buffer(ctx, fb);
 404    }
 405    else {
 406       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
 407    }
 408 }
 409
 410
 411 /**
 412  * Called via glFramebufferRenderbufferEXT().
 413  */
 414 static void
 415 intel_framebuffer_renderbuffer(GLcontext * ctx,
 416                                struct gl_framebuffer *fb,
 417                                GLenum attachment, struct gl_renderbuffer *rb)
 418 {
 419    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
 420
 421    intelFlush(ctx);
 422
 423    _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb);
 424    intel_draw_buffer(ctx, fb);
 425 }
 426
 427
 428 static GLboolean
 429 intel_update_wrapper(GLcontext *ctx, struct intel_renderbuffer *irb,
 430                      struct gl_texture_image *texImage)
 431 {
 432    if (texImage->TexFormat == MESA_FORMAT_ARGB8888) {
 433       irb->Base.DataType = GL_UNSIGNED_BYTE;
 434       DBG("Render to RGBA8 texture OK\n");
 435    }
 436    else if (texImage->TexFormat == MESA_FORMAT_XRGB8888) {
 437       irb->Base.DataType = GL_UNSIGNED_BYTE;
 438       DBG("Render to XGBA8 texture OK\n");
 439    }
 440    else if (texImage->TexFormat == MESA_FORMAT_RGB565) {
 441       irb->Base.DataType = GL_UNSIGNED_BYTE;
 442       DBG("Render to RGB5 texture OK\n");
 443    }
 444    else if (texImage->TexFormat == MESA_FORMAT_ARGB1555) {
 445       irb->Base.DataType = GL_UNSIGNED_BYTE;
 446       DBG("Render to ARGB1555 texture OK\n");
 447    }
 448    else if (texImage->TexFormat == MESA_FORMAT_ARGB4444) {
 449       irb->Base.DataType = GL_UNSIGNED_BYTE;
 450       DBG("Render to ARGB4444 texture OK\n");
 451    }
 452    else if (texImage->TexFormat == MESA_FORMAT_Z16) {
 453       irb->Base.DataType = GL_UNSIGNED_SHORT;
 454       DBG("Render to DEPTH16 texture OK\n");
 455    }
 456    else if (texImage->TexFormat == MESA_FORMAT_S8_Z24) {
 457       irb->Base.DataType = GL_UNSIGNED_INT_24_8_EXT;
 458       DBG("Render to DEPTH_STENCIL texture OK\n");
 459    }
 460    else {
 461       DBG("Render to texture BAD FORMAT %s\n",
 462           _mesa_get_format_name(texImage->TexFormat));
 463       return GL_FALSE;
 464    }
 465
 466    irb->Base.Format = texImage->TexFormat;
 467
 468    irb->Base.InternalFormat = texImage->InternalFormat;
 469    irb->Base._BaseFormat = _mesa_base_fbo_format(ctx, irb->Base.InternalFormat);
 470    irb->Base.Width = texImage->Width;
 471    irb->Base.Height = texImage->Height;
 472
 473    irb->Base.Delete = intel_delete_renderbuffer;
 474    irb->Base.AllocStorage = intel_nop_alloc_storage;
 475
 476    return GL_TRUE;
 477 }
 478
 479
 480 /**
 481  * When glFramebufferTexture[123]D is called this function sets up the
 482  * gl_renderbuffer wrapper around the texture image.
 483  * This will have the region info needed for hardware rendering.
 484  */
 485 static struct intel_renderbuffer *
 486 intel_wrap_texture(GLcontext * ctx, struct gl_texture_image *texImage)
 487 {
 488    const GLuint name = ~0;   /* not significant, but distinct for debugging */
 489    struct intel_renderbuffer *irb;
 490
 491    /* make an intel_renderbuffer to wrap the texture image */
 492    irb = CALLOC_STRUCT(intel_renderbuffer);
 493    if (!irb) {
 494       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture");
 495       return NULL;
 496    }
 497
 498    _mesa_init_renderbuffer(&irb->Base, name);
 499    irb->Base.ClassID = INTEL_RB_CLASS;
 500
 501    if (!intel_update_wrapper(ctx, irb, texImage)) {
 502       free(irb);
 503       return NULL;
 504    }
 505
 506    return irb;
 507 }
 508
 509
 510 /**
 511  * Called by glFramebufferTexture[123]DEXT() (and other places) to
 512  * prepare for rendering into texture memory.  This might be called
 513  * many times to choose different texture levels, cube faces, etc
 514  * before intel_finish_render_texture() is ever called.
 515  */
 516 static void
 517 intel_render_texture(GLcontext * ctx,
 518                      struct gl_framebuffer *fb,
 519                      struct gl_renderbuffer_attachment *att)
 520 {
 521    struct gl_texture_image *newImage
 522       = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 523    struct intel_renderbuffer *irb = intel_renderbuffer(att->Renderbuffer);
 524    struct intel_texture_image *intel_image;
 525    GLuint dst_x, dst_y;
 526
 527    (void) fb;
 528
 529    ASSERT(newImage);
 530
 531    intel_image = intel_texture_image(newImage);
 532    if (!intel_image->mt) {
 533       /* Fallback on drawing to a texture that doesn't have a miptree
 534        * (has a border, width/height 0, etc.)
 535        */
 536       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 537       _mesa_render_texture(ctx, fb, att);
 538       return;
 539    }
 540    else if (!irb) {
 541       irb = intel_wrap_texture(ctx, newImage);
 542       if (irb) {
 543          /* bind the wrapper to the attachment point */
 544          _mesa_reference_renderbuffer(&att->Renderbuffer, &irb->Base);
 545       }
 546       else {
 547          /* fallback to software rendering */
 548          _mesa_render_texture(ctx, fb, att);
 549          return;
 550       }
 551    }
 552
 553    if (!intel_update_wrapper(ctx, irb, newImage)) {
 554        _mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
 555        _mesa_render_texture(ctx, fb, att);
 556        return;
 557    }
 558
 559    DBG("Begin render texture tid %lx tex=%u w=%d h=%d refcount=%d\n",
 560        _glthread_GetID(),
 561        att->Texture->Name, newImage->Width, newImage->Height,
 562        irb->Base.RefCount);
 563
 564    /* point the renderbufer's region to the texture image region */
 565    if (irb->region != intel_image->mt->region) {
 566       if (irb->region)
 567          intel_region_release(&irb->region);
 568       intel_region_reference(&irb->region, intel_image->mt->region);
 569    }
 570
 571    /* compute offset of the particular 2D image within the texture region */
 572    intel_miptree_get_image_offset(intel_image->mt,
 573                                   att->TextureLevel,
 574                                   att->CubeMapFace,
 575                                   att->Zoffset,
 576                                   &dst_x, &dst_y);
 577
 578    intel_image->mt->region->draw_offset = (dst_y * intel_image->mt->pitch +
 579                                            dst_x) * intel_image->mt->cpp;
 580    intel_image->mt->region->draw_x = dst_x;
 581    intel_image->mt->region->draw_y = dst_y;
 582    intel_image->used_as_render_target = GL_TRUE;
 583
 584    /* update drawing region, etc */
 585    intel_draw_buffer(ctx, fb);
 586 }
 587
 588
 589 /**
 590  * Called by Mesa when rendering to a texture is done.
 591  */
 592 static void
 593 intel_finish_render_texture(GLcontext * ctx,
 594                             struct gl_renderbuffer_attachment *att)
 595 {
 596    struct intel_context *intel = intel_context(ctx);
 597    struct gl_texture_object *tex_obj = att->Texture;
 598    struct gl_texture_image *image =
 599       tex_obj->Image[att->CubeMapFace][att->TextureLevel];
 600    struct intel_texture_image *intel_image = intel_texture_image(image);
 601
 602    /* Flag that this image may now be validated into the object's miptree. */
 603    intel_image->used_as_render_target = GL_FALSE;
 604
 605    /* Since we've (probably) rendered to the texture and will (likely) use
 606     * it in the texture domain later on in this batchbuffer, flush the
 607     * batch.  Once again, we wish for a domain tracker in libdrm to cover
 608     * usage inside of a batchbuffer like GEM does in the kernel.
 609     */
 610    intel_batchbuffer_emit_mi_flush(intel->batch);
 611 }
 612
 613 /**
 614  * Do additional "completeness" testing of a framebuffer object.
 615  */
 616 static void
 617 intel_validate_framebuffer(GLcontext *ctx, struct gl_framebuffer *fb)
 618 {
 619    const struct intel_renderbuffer *depthRb =
 620       intel_get_renderbuffer(fb, BUFFER_DEPTH);
 621    const struct intel_renderbuffer *stencilRb =
 622       intel_get_renderbuffer(fb, BUFFER_STENCIL);
 623    int i;
 624
 625    if (depthRb && stencilRb && stencilRb != depthRb) {
 626       if (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Type == GL_TEXTURE &&
 627           ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Type == GL_TEXTURE &&
 628           (ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Texture->Name ==
 629            ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Texture->Name)) {
 630          /* OK */
 631       } else {
 632          /* we only support combined depth/stencil buffers, not separate
 633           * stencil buffers.
 634           */
 635          DBG("Only supports combined depth/stencil (found %s, %s)\n",
 636              depthRb ? _mesa_get_format_name(depthRb->Base.Format): "NULL",
 637              stencilRb ? _mesa_get_format_name(stencilRb->Base.Format): "NULL");
 638          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 639       }
 640    }
 641
 642    for (i = 0; i < ctx->Const.MaxDrawBuffers; i++) {
 643       struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[i];
 644       struct intel_renderbuffer *irb = intel_renderbuffer(rb);
 645
 646       if (rb == NULL)
 647          continue;
 648
 649       if (irb == NULL) {
 650          DBG("software rendering renderbuffer\n");
 651          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 652          continue;
 653       }
 654
 655       switch (irb->Base.Format) {
 656       case MESA_FORMAT_ARGB8888:
 657       case MESA_FORMAT_XRGB8888:
 658       case MESA_FORMAT_RGB565:
 659       case MESA_FORMAT_ARGB1555:
 660       case MESA_FORMAT_ARGB4444:
 661          break;
 662       default:
 663          fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
 664       }
 665    }
 666 }
 667
 668
 669 /**
 670  * Do one-time context initializations related to GL_EXT_framebuffer_object.
 671  * Hook in device driver functions.
 672  */
 673 void
 674 intel_fbo_init(struct intel_context *intel)
 675 {
 676    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
 677    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
 678    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
 679    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
 680    intel->ctx.Driver.RenderTexture = intel_render_texture;
 681    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
 682    intel->ctx.Driver.ResizeBuffers = intel_resize_buffers;
 683    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
 684    intel->ctx.Driver.BlitFramebuffer = _mesa_meta_BlitFramebuffer;
 685
 686 #if FEATURE_OES_EGL_image
 687    intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
 688       intel_image_target_renderbuffer_storage;
 689 #endif
 690 }