src/mesa/main/fbobject.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 1999-2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions 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 MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /*
  28  * GL_EXT/ARB_framebuffer_object extensions
  29  *
  30  * Authors:
  31  *   Brian Paul
  32  */
  33
  34
  35 #include "buffers.h"
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "fbobject.h"
  39 #include "formats.h"
  40 #include "framebuffer.h"
  41 #include "hash.h"
  42 #include "macros.h"
  43 #include "renderbuffer.h"
  44 #include "state.h"
  45 #include "teximage.h"
  46 #include "texobj.h"
  47
  48
  49 /** Set this to 1 to help debug FBO incompleteness problems */
  50 #define DEBUG_FBO 0
  51
  52 /** Set this to 1 to debug/log glBlitFramebuffer() calls */
  53 #define DEBUG_BLIT 0
  54
  55
  56 /**
  57  * Notes:
  58  *
  59  * None of the GL_EXT_framebuffer_object functions are compiled into
  60  * display lists.
  61  */
  62
  63
  64
  65 /*
  66  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  67  * these placeholder objects into the hash table.
  68  * Later, when the object ID is first bound, we replace the placeholder
  69  * with the real frame/renderbuffer.
  70  */
  71 static struct gl_framebuffer DummyFramebuffer;
  72 static struct gl_renderbuffer DummyRenderbuffer;
  73
  74 /* We bind this framebuffer when applications pass a NULL
  75  * drawable/surface in make current. */
  76 static struct gl_framebuffer IncompleteFramebuffer;
  77
  78
  79 #define IS_CUBE_FACE(TARGET) \
  80    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  81     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  82
  83
  84 static void
  85 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  86 {
  87    /* no op */
  88 }
  89
  90 static void
  91 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  92 {
  93    /* no op */
  94 }
  95
  96
  97 void
  98 _mesa_init_fbobjects(struct gl_context *ctx)
  99 {
 100    _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);
 101    _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);
 102    _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);
 103    DummyFramebuffer.Delete = delete_dummy_framebuffer;
 104    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
 105    IncompleteFramebuffer.Delete = delete_dummy_framebuffer;
 106 }
 107
 108 struct gl_framebuffer *
 109 _mesa_get_incomplete_framebuffer(void)
 110 {
 111    return &IncompleteFramebuffer;
 112 }
 113
 114 /**
 115  * Helper routine for getting a gl_renderbuffer.
 116  */
 117 struct gl_renderbuffer *
 118 _mesa_lookup_renderbuffer(struct gl_context *ctx, GLuint id)
 119 {
 120    struct gl_renderbuffer *rb;
 121
 122    if (id == 0)
 123       return NULL;
 124
 125    rb = (struct gl_renderbuffer *)
 126       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 127    return rb;
 128 }
 129
 130
 131 /**
 132  * Helper routine for getting a gl_framebuffer.
 133  */
 134 struct gl_framebuffer *
 135 _mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)
 136 {
 137    struct gl_framebuffer *fb;
 138
 139    if (id == 0)
 140       return NULL;
 141
 142    fb = (struct gl_framebuffer *)
 143       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 144    return fb;
 145 }
 146
 147
 148 /**
 149  * Mark the given framebuffer as invalid.  This will force the
 150  * test for framebuffer completeness to be done before the framebuffer
 151  * is used.
 152  */
 153 static void
 154 invalidate_framebuffer(struct gl_framebuffer *fb)
 155 {
 156    fb->_Status = 0; /* "indeterminate" */
 157 }
 158
 159
 160 /**
 161  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 162  * gl_renderbuffer_attachment object.
 163  * This function is only used for user-created FB objects, not the
 164  * default / window-system FB object.
 165  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 166  * the depth buffer attachment point.
 167  */
 168 struct gl_renderbuffer_attachment *
 169 _mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 170                      GLenum attachment)
 171 {
 172    GLuint i;
 173
 174    assert(fb->Name > 0);
 175
 176    switch (attachment) {
 177    case GL_COLOR_ATTACHMENT0_EXT:
 178    case GL_COLOR_ATTACHMENT1_EXT:
 179    case GL_COLOR_ATTACHMENT2_EXT:
 180    case GL_COLOR_ATTACHMENT3_EXT:
 181    case GL_COLOR_ATTACHMENT4_EXT:
 182    case GL_COLOR_ATTACHMENT5_EXT:
 183    case GL_COLOR_ATTACHMENT6_EXT:
 184    case GL_COLOR_ATTACHMENT7_EXT:
 185    case GL_COLOR_ATTACHMENT8_EXT:
 186    case GL_COLOR_ATTACHMENT9_EXT:
 187    case GL_COLOR_ATTACHMENT10_EXT:
 188    case GL_COLOR_ATTACHMENT11_EXT:
 189    case GL_COLOR_ATTACHMENT12_EXT:
 190    case GL_COLOR_ATTACHMENT13_EXT:
 191    case GL_COLOR_ATTACHMENT14_EXT:
 192    case GL_COLOR_ATTACHMENT15_EXT:
 193       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 194       if (i >= ctx->Const.MaxColorAttachments) {
 195          return NULL;
 196       }
 197       return &fb->Attachment[BUFFER_COLOR0 + i];
 198    case GL_DEPTH_STENCIL_ATTACHMENT:
 199       /* fall-through */
 200    case GL_DEPTH_BUFFER:
 201       /* fall-through / new in GL 3.0 */
 202    case GL_DEPTH_ATTACHMENT_EXT:
 203       return &fb->Attachment[BUFFER_DEPTH];
 204    case GL_STENCIL_BUFFER:
 205       /* fall-through / new in GL 3.0 */
 206    case GL_STENCIL_ATTACHMENT_EXT:
 207       return &fb->Attachment[BUFFER_STENCIL];
 208    default:
 209       return NULL;
 210    }
 211 }
 212
 213
 214 /**
 215  * As above, but only used for getting attachments of the default /
 216  * window-system framebuffer (not user-created framebuffer objects).
 217  */
 218 static struct gl_renderbuffer_attachment *
 219 _mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 220                          GLenum attachment)
 221 {
 222    assert(fb->Name == 0);
 223
 224    switch (attachment) {
 225    case GL_FRONT_LEFT:
 226       return &fb->Attachment[BUFFER_FRONT_LEFT];
 227    case GL_FRONT_RIGHT:
 228       return &fb->Attachment[BUFFER_FRONT_RIGHT];
 229    case GL_BACK_LEFT:
 230       return &fb->Attachment[BUFFER_BACK_LEFT];
 231    case GL_BACK_RIGHT:
 232       return &fb->Attachment[BUFFER_BACK_RIGHT];
 233    case GL_AUX0:
 234       if (fb->Visual.numAuxBuffers == 1) {
 235          return &fb->Attachment[BUFFER_AUX0];
 236       }
 237       return NULL;
 238    case GL_DEPTH_BUFFER:
 239       /* fall-through / new in GL 3.0 */
 240    case GL_DEPTH_ATTACHMENT_EXT:
 241       return &fb->Attachment[BUFFER_DEPTH];
 242    case GL_STENCIL_BUFFER:
 243       /* fall-through / new in GL 3.0 */
 244    case GL_STENCIL_ATTACHMENT_EXT:
 245       return &fb->Attachment[BUFFER_STENCIL];
 246    default:
 247       return NULL;
 248    }
 249 }
 250
 251
 252
 253 /**
 254  * Remove any texture or renderbuffer attached to the given attachment
 255  * point.  Update reference counts, etc.
 256  */
 257 void
 258 _mesa_remove_attachment(struct gl_context *ctx,
 259                         struct gl_renderbuffer_attachment *att)
 260 {
 261    if (att->Type == GL_TEXTURE) {
 262       ASSERT(att->Texture);
 263       if (ctx->Driver.FinishRenderTexture) {
 264          /* tell driver that we're done rendering to this texture. */
 265          ctx->Driver.FinishRenderTexture(ctx, att);
 266       }
 267       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 268       ASSERT(!att->Texture);
 269    }
 270    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 271       ASSERT(!att->Texture);
 272       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 273       ASSERT(!att->Renderbuffer);
 274    }
 275    att->Type = GL_NONE;
 276    att->Complete = GL_TRUE;
 277 }
 278
 279
 280 /**
 281  * Bind a texture object to an attachment point.
 282  * The previous binding, if any, will be removed first.
 283  */
 284 void
 285 _mesa_set_texture_attachment(struct gl_context *ctx,
 286                              struct gl_framebuffer *fb,
 287                              struct gl_renderbuffer_attachment *att,
 288                              struct gl_texture_object *texObj,
 289                              GLenum texTarget, GLuint level, GLuint zoffset)
 290 {
 291    if (att->Texture == texObj) {
 292       /* re-attaching same texture */
 293       ASSERT(att->Type == GL_TEXTURE);
 294       if (ctx->Driver.FinishRenderTexture)
 295          ctx->Driver.FinishRenderTexture(ctx, att);
 296    }
 297    else {
 298       /* new attachment */
 299       if (ctx->Driver.FinishRenderTexture && att->Texture)
 300          ctx->Driver.FinishRenderTexture(ctx, att);
 301       _mesa_remove_attachment(ctx, att);
 302       att->Type = GL_TEXTURE;
 303       assert(!att->Texture);
 304       _mesa_reference_texobj(&att->Texture, texObj);
 305    }
 306
 307    /* always update these fields */
 308    att->TextureLevel = level;
 309    att->CubeMapFace = _mesa_tex_target_to_face(texTarget);
 310    att->Zoffset = zoffset;
 311    att->Complete = GL_FALSE;
 312
 313    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 314       ctx->Driver.RenderTexture(ctx, fb, att);
 315    }
 316
 317    invalidate_framebuffer(fb);
 318 }
 319
 320
 321 /**
 322  * Bind a renderbuffer to an attachment point.
 323  * The previous binding, if any, will be removed first.
 324  */
 325 void
 326 _mesa_set_renderbuffer_attachment(struct gl_context *ctx,
 327                                   struct gl_renderbuffer_attachment *att,
 328                                   struct gl_renderbuffer *rb)
 329 {
 330    /* XXX check if re-doing same attachment, exit early */
 331    _mesa_remove_attachment(ctx, att);
 332    att->Type = GL_RENDERBUFFER_EXT;
 333    att->Texture = NULL; /* just to be safe */
 334    att->Complete = GL_FALSE;
 335    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 336 }
 337
 338
 339 /**
 340  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 341  * Attach a renderbuffer object to a framebuffer object.
 342  */
 343 void
 344 _mesa_framebuffer_renderbuffer(struct gl_context *ctx,
 345                                struct gl_framebuffer *fb,
 346                                GLenum attachment, struct gl_renderbuffer *rb)
 347 {
 348    struct gl_renderbuffer_attachment *att;
 349
 350    _glthread_LOCK_MUTEX(fb->Mutex);
 351
 352    att = _mesa_get_attachment(ctx, fb, attachment);
 353    ASSERT(att);
 354    if (rb) {
 355       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 356       if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
 357          /* do stencil attachment here (depth already done above) */
 358          att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
 359          assert(att);
 360          _mesa_set_renderbuffer_attachment(ctx, att, rb);
 361       }
 362    }
 363    else {
 364       _mesa_remove_attachment(ctx, att);
 365    }
 366
 367    invalidate_framebuffer(fb);
 368
 369    _glthread_UNLOCK_MUTEX(fb->Mutex);
 370 }
 371
 372
 373 /**
 374  * For debug only.
 375  */
 376 static void
 377 att_incomplete(const char *msg)
 378 {
 379 #if DEBUG_FBO
 380    _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
 381 #else
 382    (void) msg;
 383 #endif
 384 }
 385
 386
 387 /**
 388  * For debug only.
 389  */
 390 static void
 391 fbo_incomplete(const char *msg, int index)
 392 {
 393 #if DEBUG_FBO
 394    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 395 #else
 396    (void) msg;
 397    (void) index;
 398 #endif
 399 }
 400
 401
 402 /**
 403  * Is the given base format a legal format for a color renderbuffer?
 404  */
 405 static GLboolean
 406 is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)
 407 {
 408    switch (baseFormat) {
 409    case GL_RGB:
 410    case GL_RGBA:
 411       return GL_TRUE;
 412    case GL_ALPHA:
 413       return ctx->Extensions.ARB_framebuffer_object;
 414    case GL_RED:
 415    case GL_RG:
 416       return ctx->Extensions.ARB_texture_rg;
 417    default:
 418       return GL_FALSE;
 419    }
 420 }
 421
 422
 423 /**
 424  * Is the given base format a legal format for a depth/stencil renderbuffer?
 425  */
 426 static GLboolean
 427 is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)
 428 {
 429    switch (baseFormat) {
 430    case GL_DEPTH_COMPONENT:
 431    case GL_DEPTH_STENCIL_EXT:
 432       return GL_TRUE;
 433    default:
 434       return GL_FALSE;
 435    }
 436 }
 437
 438
 439 /**
 440  * Test if an attachment point is complete and update its Complete field.
 441  * \param format if GL_COLOR, this is a color attachment point,
 442  *               if GL_DEPTH, this is a depth component attachment point,
 443  *               if GL_STENCIL, this is a stencil component attachment point.
 444  */
 445 static void
 446 test_attachment_completeness(const struct gl_context *ctx, GLenum format,
 447                              struct gl_renderbuffer_attachment *att)
 448 {
 449    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 450
 451    /* assume complete */
 452    att->Complete = GL_TRUE;
 453
 454    /* Look for reasons why the attachment might be incomplete */
 455    if (att->Type == GL_TEXTURE) {
 456       const struct gl_texture_object *texObj = att->Texture;
 457       struct gl_texture_image *texImage;
 458       GLenum baseFormat;
 459
 460       if (!texObj) {
 461          att_incomplete("no texobj");
 462          att->Complete = GL_FALSE;
 463          return;
 464       }
 465
 466       texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
 467       if (!texImage) {
 468          att_incomplete("no teximage");
 469          att->Complete = GL_FALSE;
 470          return;
 471       }
 472       if (texImage->Width < 1 || texImage->Height < 1) {
 473          att_incomplete("teximage width/height=0");
 474          printf("texobj = %u\n", texObj->Name);
 475          printf("level = %d\n", att->TextureLevel);
 476          att->Complete = GL_FALSE;
 477          return;
 478       }
 479       if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
 480          att_incomplete("bad z offset");
 481          att->Complete = GL_FALSE;
 482          return;
 483       }
 484
 485       baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
 486
 487       if (format == GL_COLOR) {
 488          if (!is_legal_color_format(ctx, baseFormat)) {
 489             att_incomplete("bad format");
 490             att->Complete = GL_FALSE;
 491             return;
 492          }
 493          if (_mesa_is_format_compressed(texImage->TexFormat)) {
 494             att_incomplete("compressed internalformat");
 495             att->Complete = GL_FALSE;
 496             return;
 497          }
 498       }
 499       else if (format == GL_DEPTH) {
 500          if (baseFormat == GL_DEPTH_COMPONENT) {
 501             /* OK */
 502          }
 503          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 504                   ctx->Extensions.ARB_depth_texture &&
 505                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 506             /* OK */
 507          }
 508          else {
 509             att->Complete = GL_FALSE;
 510             att_incomplete("bad depth format");
 511             return;
 512          }
 513       }
 514       else {
 515          ASSERT(format == GL_STENCIL);
 516          if (ctx->Extensions.EXT_packed_depth_stencil &&
 517              ctx->Extensions.ARB_depth_texture &&
 518              baseFormat == GL_DEPTH_STENCIL_EXT) {
 519             /* OK */
 520          }
 521          else {
 522             /* no such thing as stencil-only textures */
 523             att_incomplete("illegal stencil texture");
 524             att->Complete = GL_FALSE;
 525             return;
 526          }
 527       }
 528    }
 529    else if (att->Type == GL_RENDERBUFFER_EXT) {
 530       const GLenum baseFormat =
 531          _mesa_get_format_base_format(att->Renderbuffer->Format);
 532
 533       ASSERT(att->Renderbuffer);
 534       if (!att->Renderbuffer->InternalFormat ||
 535           att->Renderbuffer->Width < 1 ||
 536           att->Renderbuffer->Height < 1) {
 537          att_incomplete("0x0 renderbuffer");
 538          att->Complete = GL_FALSE;
 539          return;
 540       }
 541       if (format == GL_COLOR) {
 542          if (baseFormat != GL_RGB &&
 543              baseFormat != GL_RGBA) {
 544             att_incomplete("bad renderbuffer color format");
 545             att->Complete = GL_FALSE;
 546             return;
 547          }
 548       }
 549       else if (format == GL_DEPTH) {
 550          if (baseFormat == GL_DEPTH_COMPONENT) {
 551             /* OK */
 552          }
 553          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 554                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 555             /* OK */
 556          }
 557          else {
 558             att_incomplete("bad renderbuffer depth format");
 559             att->Complete = GL_FALSE;
 560             return;
 561          }
 562       }
 563       else {
 564          assert(format == GL_STENCIL);
 565          if (baseFormat == GL_STENCIL_INDEX) {
 566             /* OK */
 567          }
 568          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 569                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 570             /* OK */
 571          }
 572          else {
 573             att->Complete = GL_FALSE;
 574             att_incomplete("bad renderbuffer stencil format");
 575             return;
 576          }
 577       }
 578    }
 579    else {
 580       ASSERT(att->Type == GL_NONE);
 581       /* complete */
 582       return;
 583    }
 584 }
 585
 586
 587 /**
 588  * Test if the given framebuffer object is complete and update its
 589  * Status field with the results.
 590  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 591  * driver to make hardware-specific validation/completeness checks.
 592  * Also update the framebuffer's Width and Height fields if the
 593  * framebuffer is complete.
 594  */
 595 void
 596 _mesa_test_framebuffer_completeness(struct gl_context *ctx,
 597                                     struct gl_framebuffer *fb)
 598 {
 599    GLuint numImages;
 600    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 601    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 602    GLint numSamples = -1;
 603    GLint i;
 604    GLuint j;
 605
 606    assert(fb->Name != 0);
 607
 608    numImages = 0;
 609    fb->Width = 0;
 610    fb->Height = 0;
 611
 612    /* Start at -2 to more easily loop over all attachment points.
 613     *  -2: depth buffer
 614     *  -1: stencil buffer
 615     * >=0: color buffer
 616     */
 617    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 618       struct gl_renderbuffer_attachment *att;
 619       GLenum f;
 620       gl_format mesaFormat;
 621
 622       /*
 623        * XXX for ARB_fbo, only check color buffers that are named by
 624        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 625        */
 626
 627       /* check for attachment completeness
 628        */
 629       if (i == -2) {
 630          att = &fb->Attachment[BUFFER_DEPTH];
 631          test_attachment_completeness(ctx, GL_DEPTH, att);
 632          if (!att->Complete) {
 633             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 634             fbo_incomplete("depth attachment incomplete", -1);
 635             return;
 636          }
 637       }
 638       else if (i == -1) {
 639          att = &fb->Attachment[BUFFER_STENCIL];
 640          test_attachment_completeness(ctx, GL_STENCIL, att);
 641          if (!att->Complete) {
 642             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 643             fbo_incomplete("stencil attachment incomplete", -1);
 644             return;
 645          }
 646       }
 647       else {
 648          att = &fb->Attachment[BUFFER_COLOR0 + i];
 649          test_attachment_completeness(ctx, GL_COLOR, att);
 650          if (!att->Complete) {
 651             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 652             fbo_incomplete("color attachment incomplete", i);
 653             return;
 654          }
 655       }
 656
 657       /* get width, height, format of the renderbuffer/texture
 658        */
 659       if (att->Type == GL_TEXTURE) {
 660          const struct gl_texture_image *texImg
 661             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 662          minWidth = MIN2(minWidth, texImg->Width);
 663          maxWidth = MAX2(maxWidth, texImg->Width);
 664          minHeight = MIN2(minHeight, texImg->Height);
 665          maxHeight = MAX2(maxHeight, texImg->Height);
 666          f = texImg->_BaseFormat;
 667          mesaFormat = texImg->TexFormat;
 668          numImages++;
 669          if (!is_legal_color_format(ctx, f) &&
 670              !is_legal_depth_format(ctx, f)) {
 671             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 672             fbo_incomplete("texture attachment incomplete", -1);
 673             return;
 674          }
 675       }
 676       else if (att->Type == GL_RENDERBUFFER_EXT) {
 677          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 678          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 679          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 680          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 681          f = att->Renderbuffer->InternalFormat;
 682          mesaFormat = att->Renderbuffer->Format;
 683          numImages++;
 684       }
 685       else {
 686          assert(att->Type == GL_NONE);
 687          continue;
 688       }
 689
 690       if (numSamples < 0) {
 691          /* first buffer */
 692          numSamples = att->Renderbuffer->NumSamples;
 693       }
 694
 695       /* check if integer color */
 696       fb->_IntegerColor = _mesa_is_format_integer(mesaFormat);
 697
 698       /* Error-check width, height, format, samples
 699        */
 700       if (numImages == 1) {
 701          /* save format, num samples */
 702          if (i >= 0) {
 703             intFormat = f;
 704          }
 705       }
 706       else {
 707          if (!ctx->Extensions.ARB_framebuffer_object) {
 708             /* check that width, height, format are same */
 709             if (minWidth != maxWidth || minHeight != maxHeight) {
 710                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 711                fbo_incomplete("width or height mismatch", -1);
 712                return;
 713             }
 714             /* check that all color buffer have same format */
 715             if (intFormat != GL_NONE && f != intFormat) {
 716                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 717                fbo_incomplete("format mismatch", -1);
 718                return;
 719             }
 720          }
 721          if (att->Renderbuffer &&
 722              att->Renderbuffer->NumSamples != numSamples) {
 723             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 724             fbo_incomplete("inconsistant number of samples", i);
 725             return;
 726          }
 727
 728       }
 729    }
 730
 731 #if FEATURE_GL
 732    if (ctx->API == API_OPENGL) {
 733       /* Check that all DrawBuffers are present */
 734       for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 735          if (fb->ColorDrawBuffer[j] != GL_NONE) {
 736             const struct gl_renderbuffer_attachment *att
 737                = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 738             assert(att);
 739             if (att->Type == GL_NONE) {
 740                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 741                fbo_incomplete("missing drawbuffer", j);
 742                return;
 743             }
 744          }
 745       }
 746
 747       /* Check that the ReadBuffer is present */
 748       if (fb->ColorReadBuffer != GL_NONE) {
 749          const struct gl_renderbuffer_attachment *att
 750             = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 751          assert(att);
 752          if (att->Type == GL_NONE) {
 753             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 754             fbo_incomplete("missing readbuffer", -1);
 755             return;
 756          }
 757       }
 758    }
 759 #else
 760    (void) j;
 761 #endif
 762
 763    if (numImages == 0) {
 764       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 765       fbo_incomplete("no attachments", -1);
 766       return;
 767    }
 768
 769    /* Provisionally set status = COMPLETE ... */
 770    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 771
 772    /* ... but the driver may say the FB is incomplete.
 773     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 774     * if anything.
 775     */
 776    if (ctx->Driver.ValidateFramebuffer) {
 777       ctx->Driver.ValidateFramebuffer(ctx, fb);
 778       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 779          fbo_incomplete("driver marked FBO as incomplete", -1);
 780       }
 781    }
 782
 783    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 784       /*
 785        * Note that if ARB_framebuffer_object is supported and the attached
 786        * renderbuffers/textures are different sizes, the framebuffer
 787        * width/height will be set to the smallest width/height.
 788        */
 789       fb->Width = minWidth;
 790       fb->Height = minHeight;
 791
 792       /* finally, update the visual info for the framebuffer */
 793       _mesa_update_framebuffer_visual(fb);
 794    }
 795 }
 796
 797
 798 GLboolean GLAPIENTRY
 799 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 800 {
 801    GET_CURRENT_CONTEXT(ctx);
 802    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 803    if (renderbuffer) {
 804       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 805       if (rb != NULL && rb != &DummyRenderbuffer)
 806          return GL_TRUE;
 807    }
 808    return GL_FALSE;
 809 }
 810
 811
 812 void GLAPIENTRY
 813 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 814 {
 815    struct gl_renderbuffer *newRb;
 816    GET_CURRENT_CONTEXT(ctx);
 817
 818    ASSERT_OUTSIDE_BEGIN_END(ctx);
 819
 820    if (target != GL_RENDERBUFFER_EXT) {
 821       _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
 822       return;
 823    }
 824
 825    /* No need to flush here since the render buffer binding has no
 826     * effect on rendering state.
 827     */
 828
 829    if (renderbuffer) {
 830       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 831       if (newRb == &DummyRenderbuffer) {
 832          /* ID was reserved, but no real renderbuffer object made yet */
 833          newRb = NULL;
 834       }
 835       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 836          /* All RB IDs must be Gen'd */
 837          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 838          return;
 839       }
 840
 841       if (!newRb) {
 842          /* create new renderbuffer object */
 843          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 844          if (!newRb) {
 845             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 846             return;
 847          }
 848          ASSERT(newRb->AllocStorage);
 849          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 850          newRb->RefCount = 1; /* referenced by hash table */
 851       }
 852    }
 853    else {
 854       newRb = NULL;
 855    }
 856
 857    ASSERT(newRb != &DummyRenderbuffer);
 858
 859    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 860 }
 861
 862
 863 /**
 864  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 865  * the renderbuffer.
 866  * This is used when a renderbuffer object is deleted.
 867  * The spec calls for unbinding.
 868  */
 869 static void
 870 detach_renderbuffer(struct gl_context *ctx,
 871                     struct gl_framebuffer *fb,
 872                     struct gl_renderbuffer *rb)
 873 {
 874    GLuint i;
 875    for (i = 0; i < BUFFER_COUNT; i++) {
 876       if (fb->Attachment[i].Renderbuffer == rb) {
 877          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 878       }
 879    }
 880    invalidate_framebuffer(fb);
 881 }
 882
 883
 884 void GLAPIENTRY
 885 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 886 {
 887    GLint i;
 888    GET_CURRENT_CONTEXT(ctx);
 889
 890    ASSERT_OUTSIDE_BEGIN_END(ctx);
 891    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 892
 893    for (i = 0; i < n; i++) {
 894       if (renderbuffers[i] > 0) {
 895          struct gl_renderbuffer *rb;
 896          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 897          if (rb) {
 898             /* check if deleting currently bound renderbuffer object */
 899             if (rb == ctx->CurrentRenderbuffer) {
 900                /* bind default */
 901                ASSERT(rb->RefCount >= 2);
 902                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 903             }
 904
 905             if (ctx->DrawBuffer->Name) {
 906                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 907             }
 908             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 909                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 910             }
 911
 912             /* Remove from hash table immediately, to free the ID.
 913              * But the object will not be freed until it's no longer
 914              * referenced anywhere else.
 915              */
 916             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 917
 918             if (rb != &DummyRenderbuffer) {
 919                /* no longer referenced by hash table */
 920                _mesa_reference_renderbuffer(&rb, NULL);
 921             }
 922          }
 923       }
 924    }
 925 }
 926
 927
 928 void GLAPIENTRY
 929 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 930 {
 931    GET_CURRENT_CONTEXT(ctx);
 932    GLuint first;
 933    GLint i;
 934
 935    ASSERT_OUTSIDE_BEGIN_END(ctx);
 936
 937    if (n < 0) {
 938       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 939       return;
 940    }
 941
 942    if (!renderbuffers)
 943       return;
 944
 945    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 946
 947    for (i = 0; i < n; i++) {
 948       GLuint name = first + i;
 949       renderbuffers[i] = name;
 950       /* insert dummy placeholder into hash table */
 951       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 952       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 953       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 954    }
 955 }
 956
 957
 958 /**
 959  * Given an internal format token for a render buffer, return the
 960  * corresponding base format.
 961  * This is very similar to _mesa_base_tex_format() but the set of valid
 962  * internal formats is somewhat different.
 963  *
 964  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 965  *  GL_DEPTH_STENCIL_EXT or zero if error.
 966  *
 967  * XXX in the future when we support red-only and red-green formats
 968  * we'll also return GL_RED and GL_RG.
 969  */
 970 GLenum
 971 _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
 972 {
 973    switch (internalFormat) {
 974    case GL_ALPHA:
 975    case GL_ALPHA4:
 976    case GL_ALPHA8:
 977    case GL_ALPHA12:
 978    case GL_ALPHA16:
 979       return GL_ALPHA;
 980    case GL_RGB:
 981    case GL_R3_G3_B2:
 982    case GL_RGB4:
 983    case GL_RGB5:
 984    case GL_RGB8:
 985    case GL_RGB10:
 986    case GL_RGB12:
 987    case GL_RGB16:
 988       return GL_RGB;
 989    case GL_RGBA:
 990    case GL_RGBA2:
 991    case GL_RGBA4:
 992    case GL_RGB5_A1:
 993    case GL_RGBA8:
 994    case GL_RGB10_A2:
 995    case GL_RGBA12:
 996    case GL_RGBA16:
 997    case GL_RGBA16_SNORM:
 998       return GL_RGBA;
 999    case GL_STENCIL_INDEX:
1000    case GL_STENCIL_INDEX1_EXT:
1001    case GL_STENCIL_INDEX4_EXT:
1002    case GL_STENCIL_INDEX8_EXT:
1003    case GL_STENCIL_INDEX16_EXT:
1004       return GL_STENCIL_INDEX;
1005    case GL_DEPTH_COMPONENT:
1006    case GL_DEPTH_COMPONENT16:
1007    case GL_DEPTH_COMPONENT24:
1008    case GL_DEPTH_COMPONENT32:
1009       return GL_DEPTH_COMPONENT;
1010    case GL_DEPTH_STENCIL_EXT:
1011    case GL_DEPTH24_STENCIL8_EXT:
1012       if (ctx->Extensions.EXT_packed_depth_stencil)
1013          return GL_DEPTH_STENCIL_EXT;
1014       else
1015          return 0;
1016    /* XXX add floating point formats eventually */
1017    default:
1018       return 0;
1019    }
1020 }
1021
1022
1023 /** sentinal value, see below */
1024 #define NO_SAMPLES 1000
1025
1026
1027 /**
1028  * Helper function used by _mesa_RenderbufferStorageEXT() and
1029  * _mesa_RenderbufferStorageMultisample().
1030  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
1031  */
1032 static void
1033 renderbuffer_storage(GLenum target, GLenum internalFormat,
1034                      GLsizei width, GLsizei height, GLsizei samples)
1035 {
1036    const char *func = samples == NO_SAMPLES ?
1037       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
1038    struct gl_renderbuffer *rb;
1039    GLenum baseFormat;
1040    GET_CURRENT_CONTEXT(ctx);
1041
1042    ASSERT_OUTSIDE_BEGIN_END(ctx);
1043
1044    if (target != GL_RENDERBUFFER_EXT) {
1045       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
1046       return;
1047    }
1048
1049    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
1050    if (baseFormat == 0) {
1051       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
1052       return;
1053    }
1054
1055    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1056       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
1057       return;
1058    }
1059
1060    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1061       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
1062       return;
1063    }
1064
1065    if (samples == NO_SAMPLES) {
1066       /* NumSamples == 0 indicates non-multisampling */
1067       samples = 0;
1068    }
1069    else if (samples > (GLsizei) ctx->Const.MaxSamples) {
1070       /* note: driver may choose to use more samples than what's requested */
1071       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
1072       return;
1073    }
1074
1075    rb = ctx->CurrentRenderbuffer;
1076    if (!rb) {
1077       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
1078       return;
1079    }
1080
1081    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1082
1083    if (rb->InternalFormat == internalFormat &&
1084        rb->Width == (GLuint) width &&
1085        rb->Height == (GLuint) height) {
1086       /* no change in allocation needed */
1087       return;
1088    }
1089
1090    /* These MUST get set by the AllocStorage func */
1091    rb->Format = MESA_FORMAT_NONE;
1092    rb->NumSamples = samples;
1093
1094    /* Now allocate the storage */
1095    ASSERT(rb->AllocStorage);
1096    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
1097       /* No error - check/set fields now */
1098       assert(rb->Format != MESA_FORMAT_NONE);
1099       assert(rb->Width == (GLuint) width);
1100       assert(rb->Height == (GLuint) height);
1101       rb->InternalFormat = internalFormat;
1102       rb->_BaseFormat = baseFormat;
1103       assert(rb->_BaseFormat != 0);
1104    }
1105    else {
1106       /* Probably ran out of memory - clear the fields */
1107       rb->Width = 0;
1108       rb->Height = 0;
1109       rb->Format = MESA_FORMAT_NONE;
1110       rb->InternalFormat = GL_NONE;
1111       rb->_BaseFormat = GL_NONE;
1112       rb->NumSamples = 0;
1113    }
1114
1115    /*
1116    test_framebuffer_completeness(ctx, fb);
1117    */
1118    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1119     * points???
1120     */
1121 }
1122
1123
1124 #if FEATURE_OES_EGL_image
1125 void GLAPIENTRY
1126 _mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
1127 {
1128    struct gl_renderbuffer *rb;
1129    GET_CURRENT_CONTEXT(ctx);
1130    ASSERT_OUTSIDE_BEGIN_END(ctx);
1131
1132    if (!ctx->Extensions.OES_EGL_image) {
1133       _mesa_error(ctx, GL_INVALID_OPERATION,
1134                   "glEGLImageTargetRenderbufferStorageOES(unsupported)");
1135       return;
1136    }
1137
1138    if (target != GL_RENDERBUFFER) {
1139       _mesa_error(ctx, GL_INVALID_ENUM,
1140                   "EGLImageTargetRenderbufferStorageOES");
1141       return;
1142    }
1143
1144    rb = ctx->CurrentRenderbuffer;
1145    if (!rb) {
1146       _mesa_error(ctx, GL_INVALID_OPERATION,
1147                   "EGLImageTargetRenderbufferStorageOES");
1148       return;
1149    }
1150
1151    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1152
1153    ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
1154 }
1155 #endif
1156
1157
1158 /**
1159  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1160  * _mesa_GetFramebufferAttachmentParameterivEXT()
1161  * We have to be careful to respect the base format.  For example, if a
1162  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1163  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1164  * we need to return zero.
1165  */
1166 static GLint
1167 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1168 {
1169    switch (pname) {
1170    case GL_RENDERBUFFER_RED_SIZE_EXT:
1171    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1172    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1173    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1174    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1175    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1176       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1177          return _mesa_get_format_bits(format, pname);
1178       else
1179          return 0;
1180    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1181    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1182       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA)
1183          return _mesa_get_format_bits(format, pname);
1184       else
1185          return 0;
1186    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1187    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1188       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1189          return _mesa_get_format_bits(format, pname);
1190       else
1191          return 0;
1192    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1193    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1194       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1195          return _mesa_get_format_bits(format, pname);
1196       else
1197          return 0;
1198    default:
1199       return 0;
1200    }
1201 }
1202
1203
1204
1205 void GLAPIENTRY
1206 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1207                              GLsizei width, GLsizei height)
1208 {
1209    /* GL_ARB_fbo says calling this function is equivalent to calling
1210     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1211     * a token value here just for error reporting purposes.
1212     */
1213    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1214 }
1215
1216
1217 void GLAPIENTRY
1218 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1219                                      GLenum internalFormat,
1220                                      GLsizei width, GLsizei height)
1221 {
1222    renderbuffer_storage(target, internalFormat, width, height, samples);
1223 }
1224
1225
1226 /**
1227  * OpenGL ES version of glRenderBufferStorage.
1228  */
1229 void GLAPIENTRY
1230 _es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1231                            GLsizei width, GLsizei height)
1232 {
1233    switch (internalFormat) {
1234    case GL_RGB565:
1235       /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
1236       /* choose a closest format */
1237       internalFormat = GL_RGB5;
1238       break;
1239    default:
1240       break;
1241    }
1242
1243    renderbuffer_storage(target, internalFormat, width, height, 0);
1244 }
1245
1246
1247 void GLAPIENTRY
1248 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1249 {
1250    struct gl_renderbuffer *rb;
1251    GET_CURRENT_CONTEXT(ctx);
1252
1253    ASSERT_OUTSIDE_BEGIN_END(ctx);
1254
1255    if (target != GL_RENDERBUFFER_EXT) {
1256       _mesa_error(ctx, GL_INVALID_ENUM,
1257                   "glGetRenderbufferParameterivEXT(target)");
1258       return;
1259    }
1260
1261    rb = ctx->CurrentRenderbuffer;
1262    if (!rb) {
1263       _mesa_error(ctx, GL_INVALID_OPERATION,
1264                   "glGetRenderbufferParameterivEXT");
1265       return;
1266    }
1267
1268    /* No need to flush here since we're just quering state which is
1269     * not effected by rendering.
1270     */
1271
1272    switch (pname) {
1273    case GL_RENDERBUFFER_WIDTH_EXT:
1274       *params = rb->Width;
1275       return;
1276    case GL_RENDERBUFFER_HEIGHT_EXT:
1277       *params = rb->Height;
1278       return;
1279    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1280       *params = rb->InternalFormat;
1281       return;
1282    case GL_RENDERBUFFER_RED_SIZE_EXT:
1283    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1284    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1285    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1286    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1287    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1288       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1289       break;
1290    case GL_RENDERBUFFER_SAMPLES:
1291       if (ctx->Extensions.ARB_framebuffer_object) {
1292          *params = rb->NumSamples;
1293          break;
1294       }
1295       /* fallthrough */
1296    default:
1297       _mesa_error(ctx, GL_INVALID_ENUM,
1298                   "glGetRenderbufferParameterivEXT(target)");
1299       return;
1300    }
1301 }
1302
1303
1304 GLboolean GLAPIENTRY
1305 _mesa_IsFramebufferEXT(GLuint framebuffer)
1306 {
1307    GET_CURRENT_CONTEXT(ctx);
1308    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1309    if (framebuffer) {
1310       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1311       if (rb != NULL && rb != &DummyFramebuffer)
1312          return GL_TRUE;
1313    }
1314    return GL_FALSE;
1315 }
1316
1317
1318 /**
1319  * Check if any of the attachments of the given framebuffer are textures
1320  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1321  * attachments.
1322  */
1323 static void
1324 check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1325 {
1326    GLuint i;
1327    ASSERT(ctx->Driver.RenderTexture);
1328
1329    if (fb->Name == 0)
1330       return; /* can't render to texture with winsys framebuffers */
1331
1332    for (i = 0; i < BUFFER_COUNT; i++) {
1333       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1334       struct gl_texture_object *texObj = att->Texture;
1335       if (texObj
1336           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1337          ctx->Driver.RenderTexture(ctx, fb, att);
1338       }
1339    }
1340 }
1341
1342
1343 /**
1344  * Examine all the framebuffer's attachments to see if any are textures.
1345  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1346  * notify the device driver that the texture image may have changed.
1347  */
1348 static void
1349 check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1350 {
1351    if (fb->Name == 0)
1352       return; /* can't render to texture with winsys framebuffers */
1353
1354    if (ctx->Driver.FinishRenderTexture) {
1355       GLuint i;
1356       for (i = 0; i < BUFFER_COUNT; i++) {
1357          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1358          if (att->Texture && att->Renderbuffer) {
1359             ctx->Driver.FinishRenderTexture(ctx, att);
1360          }
1361       }
1362    }
1363 }
1364
1365
1366 void GLAPIENTRY
1367 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1368 {
1369    struct gl_framebuffer *newDrawFb, *newReadFb;
1370    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1371    GLboolean bindReadBuf, bindDrawBuf;
1372    GET_CURRENT_CONTEXT(ctx);
1373
1374 #ifdef DEBUG
1375    if (ctx->Extensions.ARB_framebuffer_object) {
1376       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1377       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1378    }
1379 #endif
1380
1381    ASSERT_OUTSIDE_BEGIN_END(ctx);
1382
1383    if (!ctx->Extensions.EXT_framebuffer_object) {
1384       _mesa_error(ctx, GL_INVALID_OPERATION,
1385                   "glBindFramebufferEXT(unsupported)");
1386       return;
1387    }
1388
1389    switch (target) {
1390 #if FEATURE_EXT_framebuffer_blit
1391    case GL_DRAW_FRAMEBUFFER_EXT:
1392       if (!ctx->Extensions.EXT_framebuffer_blit) {
1393          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1394          return;
1395       }
1396       bindDrawBuf = GL_TRUE;
1397       bindReadBuf = GL_FALSE;
1398       break;
1399    case GL_READ_FRAMEBUFFER_EXT:
1400       if (!ctx->Extensions.EXT_framebuffer_blit) {
1401          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1402          return;
1403       }
1404       bindDrawBuf = GL_FALSE;
1405       bindReadBuf = GL_TRUE;
1406       break;
1407 #endif
1408    case GL_FRAMEBUFFER_EXT:
1409       bindDrawBuf = GL_TRUE;
1410       bindReadBuf = GL_TRUE;
1411       break;
1412    default:
1413       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1414       return;
1415    }
1416
1417    if (framebuffer) {
1418       /* Binding a user-created framebuffer object */
1419       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1420       if (newDrawFb == &DummyFramebuffer) {
1421          /* ID was reserved, but no real framebuffer object made yet */
1422          newDrawFb = NULL;
1423       }
1424       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1425          /* All FBO IDs must be Gen'd */
1426          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1427          return;
1428       }
1429
1430       if (!newDrawFb) {
1431          /* create new framebuffer object */
1432          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1433          if (!newDrawFb) {
1434             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1435             return;
1436          }
1437          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1438       }
1439       newReadFb = newDrawFb;
1440    }
1441    else {
1442       /* Binding the window system framebuffer (which was originally set
1443        * with MakeCurrent).
1444        */
1445       newDrawFb = ctx->WinSysDrawBuffer;
1446       newReadFb = ctx->WinSysReadBuffer;
1447    }
1448
1449    ASSERT(newDrawFb);
1450    ASSERT(newDrawFb != &DummyFramebuffer);
1451
1452    /* save pointers to current/old framebuffers */
1453    oldDrawFb = ctx->DrawBuffer;
1454    oldReadFb = ctx->ReadBuffer;
1455
1456    /* check if really changing bindings */
1457    if (oldDrawFb == newDrawFb)
1458       bindDrawBuf = GL_FALSE;
1459    if (oldReadFb == newReadFb)
1460       bindReadBuf = GL_FALSE;
1461
1462    /*
1463     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1464     *
1465     * We also check if we're beginning and/or ending render-to-texture.
1466     * When a framebuffer with texture attachments is unbound, call
1467     * ctx->Driver.FinishRenderTexture().
1468     * When a framebuffer with texture attachments is bound, call
1469     * ctx->Driver.RenderTexture().
1470     *
1471     * Note that if the ReadBuffer has texture attachments we don't consider
1472     * that a render-to-texture case.
1473     */
1474    if (bindReadBuf) {
1475       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1476
1477       /* check if old readbuffer was render-to-texture */
1478       check_end_texture_render(ctx, oldReadFb);
1479
1480       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1481    }
1482
1483    if (bindDrawBuf) {
1484       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1485
1486       /* check if old read/draw buffers were render-to-texture */
1487       if (!bindReadBuf)
1488          check_end_texture_render(ctx, oldReadFb);
1489
1490       if (oldDrawFb != oldReadFb)
1491          check_end_texture_render(ctx, oldDrawFb);
1492
1493       /* check if newly bound framebuffer has any texture attachments */
1494       check_begin_texture_render(ctx, newDrawFb);
1495
1496       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1497    }
1498
1499    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1500       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1501    }
1502 }
1503
1504
1505 void GLAPIENTRY
1506 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1507 {
1508    GLint i;
1509    GET_CURRENT_CONTEXT(ctx);
1510
1511    ASSERT_OUTSIDE_BEGIN_END(ctx);
1512    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1513
1514    for (i = 0; i < n; i++) {
1515       if (framebuffers[i] > 0) {
1516          struct gl_framebuffer *fb;
1517          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1518          if (fb) {
1519             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1520
1521             /* check if deleting currently bound framebuffer object */
1522             if (ctx->Extensions.EXT_framebuffer_blit) {
1523                /* separate draw/read binding points */
1524                if (fb == ctx->DrawBuffer) {
1525                   /* bind default */
1526                   ASSERT(fb->RefCount >= 2);
1527                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1528                }
1529                if (fb == ctx->ReadBuffer) {
1530                   /* bind default */
1531                   ASSERT(fb->RefCount >= 2);
1532                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1533                }
1534             }
1535             else {
1536                /* only one binding point for read/draw buffers */
1537                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1538                   /* bind default */
1539                   ASSERT(fb->RefCount >= 2);
1540                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1541                }
1542             }
1543
1544             /* remove from hash table immediately, to free the ID */
1545             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1546
1547             if (fb != &DummyFramebuffer) {
1548                /* But the object will not be freed until it's no longer
1549                 * bound in any context.
1550                 */
1551                _mesa_reference_framebuffer(&fb, NULL);
1552             }
1553          }
1554       }
1555    }
1556 }
1557
1558
1559 void GLAPIENTRY
1560 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1561 {
1562    GET_CURRENT_CONTEXT(ctx);
1563    GLuint first;
1564    GLint i;
1565
1566    ASSERT_OUTSIDE_BEGIN_END(ctx);
1567
1568    if (n < 0) {
1569       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1570       return;
1571    }
1572
1573    if (!framebuffers)
1574       return;
1575
1576    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1577
1578    for (i = 0; i < n; i++) {
1579       GLuint name = first + i;
1580       framebuffers[i] = name;
1581       /* insert dummy placeholder into hash table */
1582       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1583       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1584       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1585    }
1586 }
1587
1588
1589
1590 GLenum GLAPIENTRY
1591 _mesa_CheckFramebufferStatusEXT(GLenum target)
1592 {
1593    struct gl_framebuffer *buffer;
1594    GET_CURRENT_CONTEXT(ctx);
1595
1596    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1597
1598    switch (target) {
1599 #if FEATURE_EXT_framebuffer_blit
1600    case GL_DRAW_FRAMEBUFFER_EXT:
1601       if (!ctx->Extensions.EXT_framebuffer_blit) {
1602          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1603          return 0;
1604       }
1605       buffer = ctx->DrawBuffer;
1606       break;
1607    case GL_READ_FRAMEBUFFER_EXT:
1608       if (!ctx->Extensions.EXT_framebuffer_blit) {
1609          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1610          return 0;
1611       }
1612       buffer = ctx->ReadBuffer;
1613       break;
1614 #endif
1615    case GL_FRAMEBUFFER_EXT:
1616       buffer = ctx->DrawBuffer;
1617       break;
1618    default:
1619       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1620       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1621    }
1622
1623    if (buffer->Name == 0) {
1624       /* The window system / default framebuffer is always complete */
1625       return GL_FRAMEBUFFER_COMPLETE_EXT;
1626    }
1627
1628    /* No need to flush here */
1629
1630    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1631       _mesa_test_framebuffer_completeness(ctx, buffer);
1632    }
1633
1634    return buffer->_Status;
1635 }
1636
1637
1638
1639 /**
1640  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1641  */
1642 static void
1643 framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
1644                     GLenum attachment, GLenum textarget, GLuint texture,
1645                     GLint level, GLint zoffset)
1646 {
1647    struct gl_renderbuffer_attachment *att;
1648    struct gl_texture_object *texObj = NULL;
1649    struct gl_framebuffer *fb;
1650    GLboolean error = GL_FALSE;
1651
1652    ASSERT_OUTSIDE_BEGIN_END(ctx);
1653
1654    switch (target) {
1655    case GL_READ_FRAMEBUFFER_EXT:
1656       error = !ctx->Extensions.EXT_framebuffer_blit;
1657       fb = ctx->ReadBuffer;
1658       break;
1659    case GL_DRAW_FRAMEBUFFER_EXT:
1660       error = !ctx->Extensions.EXT_framebuffer_blit;
1661       /* fall-through */
1662    case GL_FRAMEBUFFER_EXT:
1663       fb = ctx->DrawBuffer;
1664       break;
1665    default:
1666       error = GL_TRUE;
1667    }
1668
1669    if (error) {
1670       _mesa_error(ctx, GL_INVALID_ENUM,
1671                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1672       return;
1673    }
1674
1675    ASSERT(fb);
1676
1677    /* check framebuffer binding */
1678    if (fb->Name == 0) {
1679       _mesa_error(ctx, GL_INVALID_OPERATION,
1680                   "glFramebufferTexture%sEXT", caller);
1681       return;
1682    }
1683
1684
1685    /* The textarget, level, and zoffset parameters are only validated if
1686     * texture is non-zero.
1687     */
1688    if (texture) {
1689       GLboolean err = GL_TRUE;
1690
1691       texObj = _mesa_lookup_texture(ctx, texture);
1692       if (texObj != NULL) {
1693          if (textarget == 0) {
1694             /* XXX what's the purpose of this? */
1695             err = (texObj->Target != GL_TEXTURE_3D) &&
1696                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1697                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1698          }
1699          else {
1700             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1701                 ? !IS_CUBE_FACE(textarget)
1702                 : (texObj->Target != textarget);
1703          }
1704       }
1705       else {
1706          /* can't render to a non-existant texture */
1707          _mesa_error(ctx, GL_INVALID_OPERATION,
1708                      "glFramebufferTexture%sEXT(non existant texture)",
1709                      caller);
1710          return;
1711       }
1712
1713       if (err) {
1714          _mesa_error(ctx, GL_INVALID_OPERATION,
1715                      "glFramebufferTexture%sEXT(texture target mismatch)",
1716                      caller);
1717          return;
1718       }
1719
1720       if (texObj->Target == GL_TEXTURE_3D) {
1721          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1722          if (zoffset < 0 || zoffset >= maxSize) {
1723             _mesa_error(ctx, GL_INVALID_VALUE,
1724                         "glFramebufferTexture%sEXT(zoffset)", caller);
1725             return;
1726          }
1727       }
1728       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1729                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1730          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1731             _mesa_error(ctx, GL_INVALID_VALUE,
1732                         "glFramebufferTexture%sEXT(layer)", caller);
1733             return;
1734          }
1735       }
1736
1737       if ((level < 0) ||
1738           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1739          _mesa_error(ctx, GL_INVALID_VALUE,
1740                      "glFramebufferTexture%sEXT(level)", caller);
1741          return;
1742       }
1743    }
1744
1745    att = _mesa_get_attachment(ctx, fb, attachment);
1746    if (att == NULL) {
1747       _mesa_error(ctx, GL_INVALID_ENUM,
1748                   "glFramebufferTexture%sEXT(attachment)", caller);
1749       return;
1750    }
1751
1752    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1753
1754    _glthread_LOCK_MUTEX(fb->Mutex);
1755    if (texObj) {
1756       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1757                                    level, zoffset);
1758       /* Set the render-to-texture flag.  We'll check this flag in
1759        * glTexImage() and friends to determine if we need to revalidate
1760        * any FBOs that might be rendering into this texture.
1761        * This flag never gets cleared since it's non-trivial to determine
1762        * when all FBOs might be done rendering to this texture.  That's OK
1763        * though since it's uncommon to render to a texture then repeatedly
1764        * call glTexImage() to change images in the texture.
1765        */
1766       texObj->_RenderToTexture = GL_TRUE;
1767    }
1768    else {
1769       _mesa_remove_attachment(ctx, att);
1770    }
1771
1772    invalidate_framebuffer(fb);
1773
1774    _glthread_UNLOCK_MUTEX(fb->Mutex);
1775 }
1776
1777
1778
1779 void GLAPIENTRY
1780 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1781                               GLenum textarget, GLuint texture, GLint level)
1782 {
1783    GET_CURRENT_CONTEXT(ctx);
1784
1785    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1786       _mesa_error(ctx, GL_INVALID_ENUM,
1787                   "glFramebufferTexture1DEXT(textarget)");
1788       return;
1789    }
1790
1791    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1792                        level, 0);
1793 }
1794
1795
1796 void GLAPIENTRY
1797 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1798                               GLenum textarget, GLuint texture, GLint level)
1799 {
1800    GET_CURRENT_CONTEXT(ctx);
1801
1802    if ((texture != 0) &&
1803        (textarget != GL_TEXTURE_2D) &&
1804        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1805        (!IS_CUBE_FACE(textarget))) {
1806       _mesa_error(ctx, GL_INVALID_OPERATION,
1807                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1808       return;
1809    }
1810
1811    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1812                        level, 0);
1813 }
1814
1815
1816 void GLAPIENTRY
1817 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1818                               GLenum textarget, GLuint texture,
1819                               GLint level, GLint zoffset)
1820 {
1821    GET_CURRENT_CONTEXT(ctx);
1822
1823    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1824       _mesa_error(ctx, GL_INVALID_ENUM,
1825                   "glFramebufferTexture3DEXT(textarget)");
1826       return;
1827    }
1828
1829    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1830                        level, zoffset);
1831 }
1832
1833
1834 void GLAPIENTRY
1835 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1836                                  GLuint texture, GLint level, GLint layer)
1837 {
1838    GET_CURRENT_CONTEXT(ctx);
1839
1840    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1841                        level, layer);
1842 }
1843
1844
1845 void GLAPIENTRY
1846 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1847                                  GLenum renderbufferTarget,
1848                                  GLuint renderbuffer)
1849 {
1850    struct gl_renderbuffer_attachment *att;
1851    struct gl_framebuffer *fb;
1852    struct gl_renderbuffer *rb;
1853    GET_CURRENT_CONTEXT(ctx);
1854
1855    ASSERT_OUTSIDE_BEGIN_END(ctx);
1856
1857    switch (target) {
1858 #if FEATURE_EXT_framebuffer_blit
1859    case GL_DRAW_FRAMEBUFFER_EXT:
1860       if (!ctx->Extensions.EXT_framebuffer_blit) {
1861          _mesa_error(ctx, GL_INVALID_ENUM,
1862                      "glFramebufferRenderbufferEXT(target)");
1863          return;
1864       }
1865       fb = ctx->DrawBuffer;
1866       break;
1867    case GL_READ_FRAMEBUFFER_EXT:
1868       if (!ctx->Extensions.EXT_framebuffer_blit) {
1869          _mesa_error(ctx, GL_INVALID_ENUM,
1870                      "glFramebufferRenderbufferEXT(target)");
1871          return;
1872       }
1873       fb = ctx->ReadBuffer;
1874       break;
1875 #endif
1876    case GL_FRAMEBUFFER_EXT:
1877       fb = ctx->DrawBuffer;
1878       break;
1879    default:
1880       _mesa_error(ctx, GL_INVALID_ENUM,
1881                   "glFramebufferRenderbufferEXT(target)");
1882       return;
1883    }
1884
1885    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1886       _mesa_error(ctx, GL_INVALID_ENUM,
1887                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1888       return;
1889    }
1890
1891    if (fb->Name == 0) {
1892       /* Can't attach new renderbuffers to a window system framebuffer */
1893       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1894       return;
1895    }
1896
1897    att = _mesa_get_attachment(ctx, fb, attachment);
1898    if (att == NULL) {
1899       _mesa_error(ctx, GL_INVALID_ENUM,
1900                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1901                   _mesa_lookup_enum_by_nr(attachment));
1902       return;
1903    }
1904
1905    if (renderbuffer) {
1906       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1907       if (!rb) {
1908          _mesa_error(ctx, GL_INVALID_OPERATION,
1909                      "glFramebufferRenderbufferEXT(non-existant"
1910                      " renderbuffer %u)", renderbuffer);
1911          return;
1912       }
1913    }
1914    else {
1915       /* remove renderbuffer attachment */
1916       rb = NULL;
1917    }
1918
1919    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
1920        rb && rb->Format != MESA_FORMAT_NONE) {
1921       /* make sure the renderbuffer is a depth/stencil format */
1922       const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
1923       if (baseFormat != GL_DEPTH_STENCIL) {
1924          _mesa_error(ctx, GL_INVALID_OPERATION,
1925                      "glFramebufferRenderbufferEXT(renderbuffer"
1926                      " is not DEPTH_STENCIL format)");
1927          return;
1928       }
1929    }
1930
1931
1932    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1933
1934    assert(ctx->Driver.FramebufferRenderbuffer);
1935    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1936
1937    /* Some subsequent GL commands may depend on the framebuffer's visual
1938     * after the binding is updated.  Update visual info now.
1939     */
1940    _mesa_update_framebuffer_visual(fb);
1941 }
1942
1943
1944 void GLAPIENTRY
1945 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1946                                              GLenum pname, GLint *params)
1947 {
1948    const struct gl_renderbuffer_attachment *att;
1949    struct gl_framebuffer *buffer;
1950    GET_CURRENT_CONTEXT(ctx);
1951
1952    ASSERT_OUTSIDE_BEGIN_END(ctx);
1953
1954    switch (target) {
1955 #if FEATURE_EXT_framebuffer_blit
1956    case GL_DRAW_FRAMEBUFFER_EXT:
1957       if (!ctx->Extensions.EXT_framebuffer_blit) {
1958          _mesa_error(ctx, GL_INVALID_ENUM,
1959                      "glGetFramebufferAttachmentParameterivEXT(target)");
1960          return;
1961       }
1962       buffer = ctx->DrawBuffer;
1963       break;
1964    case GL_READ_FRAMEBUFFER_EXT:
1965       if (!ctx->Extensions.EXT_framebuffer_blit) {
1966          _mesa_error(ctx, GL_INVALID_ENUM,
1967                      "glGetFramebufferAttachmentParameterivEXT(target)");
1968          return;
1969       }
1970       buffer = ctx->ReadBuffer;
1971       break;
1972 #endif
1973    case GL_FRAMEBUFFER_EXT:
1974       buffer = ctx->DrawBuffer;
1975       break;
1976    default:
1977       _mesa_error(ctx, GL_INVALID_ENUM,
1978                   "glGetFramebufferAttachmentParameterivEXT(target)");
1979       return;
1980    }
1981
1982    if (buffer->Name == 0) {
1983       /* the default / window-system FBO */
1984       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
1985    }
1986    else {
1987       /* user-created framebuffer FBO */
1988       att = _mesa_get_attachment(ctx, buffer, attachment);
1989    }
1990
1991    if (att == NULL) {
1992       _mesa_error(ctx, GL_INVALID_ENUM,
1993                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1994       return;
1995    }
1996
1997    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1998       /* the depth and stencil attachments must point to the same buffer */
1999       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
2000       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
2001       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
2002       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
2003          _mesa_error(ctx, GL_INVALID_OPERATION,
2004                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
2005                      " attachments differ)");
2006          return;
2007       }
2008    }
2009
2010    /* No need to flush here */
2011
2012    switch (pname) {
2013    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
2014       *params = att->Type;
2015       return;
2016    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
2017       if (att->Type == GL_RENDERBUFFER_EXT) {
2018          *params = att->Renderbuffer->Name;
2019       }
2020       else if (att->Type == GL_TEXTURE) {
2021          *params = att->Texture->Name;
2022       }
2023       else {
2024          _mesa_error(ctx, GL_INVALID_ENUM,
2025                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2026       }
2027       return;
2028    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
2029       if (att->Type == GL_TEXTURE) {
2030          *params = att->TextureLevel;
2031       }
2032       else {
2033          _mesa_error(ctx, GL_INVALID_ENUM,
2034                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2035       }
2036       return;
2037    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
2038       if (att->Type == GL_TEXTURE) {
2039          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
2040             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
2041          }
2042          else {
2043             *params = 0;
2044          }
2045       }
2046       else {
2047          _mesa_error(ctx, GL_INVALID_ENUM,
2048                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2049       }
2050       return;
2051    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
2052       if (att->Type == GL_TEXTURE) {
2053          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
2054             *params = att->Zoffset;
2055          }
2056          else {
2057             *params = 0;
2058          }
2059       }
2060       else {
2061          _mesa_error(ctx, GL_INVALID_ENUM,
2062                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2063       }
2064       return;
2065    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
2066       if (!ctx->Extensions.ARB_framebuffer_object) {
2067          _mesa_error(ctx, GL_INVALID_ENUM,
2068                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2069       }
2070       else {
2071          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
2072       }
2073       return;
2074    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
2075       if (!ctx->Extensions.ARB_framebuffer_object) {
2076          _mesa_error(ctx, GL_INVALID_ENUM,
2077                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2078          return;
2079       }
2080       else {
2081          gl_format format = att->Renderbuffer->Format;
2082          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
2083             /* special cases */
2084             *params = GL_INDEX;
2085          }
2086          else {
2087             *params = _mesa_get_format_datatype(format);
2088          }
2089       }
2090       return;
2091    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
2092    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
2093    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
2094    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
2095    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
2096    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
2097       if (!ctx->Extensions.ARB_framebuffer_object) {
2098          _mesa_error(ctx, GL_INVALID_ENUM,
2099                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2100       }
2101       else if (att->Texture) {
2102          const struct gl_texture_image *texImage =
2103             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
2104                                    att->TextureLevel);
2105          if (texImage) {
2106             *params = get_component_bits(pname, texImage->_BaseFormat,
2107                                          texImage->TexFormat);
2108          }
2109          else {
2110             *params = 0;
2111          }
2112       }
2113       else if (att->Renderbuffer) {
2114          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
2115                                       att->Renderbuffer->Format);
2116       }
2117       else {
2118          *params = 0;
2119       }
2120       return;
2121    default:
2122       _mesa_error(ctx, GL_INVALID_ENUM,
2123                   "glGetFramebufferAttachmentParameterivEXT(pname)");
2124       return;
2125    }
2126 }
2127
2128
2129 void GLAPIENTRY
2130 _mesa_GenerateMipmapEXT(GLenum target)
2131 {
2132    struct gl_texture_object *texObj;
2133    GET_CURRENT_CONTEXT(ctx);
2134
2135    ASSERT_OUTSIDE_BEGIN_END(ctx);
2136    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2137
2138    switch (target) {
2139    case GL_TEXTURE_1D:
2140    case GL_TEXTURE_2D:
2141    case GL_TEXTURE_3D:
2142    case GL_TEXTURE_CUBE_MAP:
2143       /* OK, legal value */
2144       break;
2145    default:
2146       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
2147       return;
2148    }
2149
2150    texObj = _mesa_get_current_tex_object(ctx, target);
2151
2152    if (texObj->BaseLevel >= texObj->MaxLevel) {
2153       /* nothing to do */
2154       return;
2155    }
2156
2157    _mesa_lock_texture(ctx, texObj);
2158    if (target == GL_TEXTURE_CUBE_MAP) {
2159       GLuint face;
2160       for (face = 0; face < 6; face++)
2161          ctx->Driver.GenerateMipmap(ctx,
2162                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
2163                                     texObj);
2164    }
2165    else {
2166       ctx->Driver.GenerateMipmap(ctx, target, texObj);
2167    }
2168    _mesa_unlock_texture(ctx, texObj);
2169 }
2170
2171
2172 #if FEATURE_EXT_framebuffer_blit
2173
2174 static const struct gl_renderbuffer_attachment *
2175 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
2176 {
2177    GLuint i;
2178    for (i = 0; i < Elements(fb->Attachment); i++) {
2179       if (fb->Attachment[i].Renderbuffer == rb)
2180          return &fb->Attachment[i];
2181    }
2182    return NULL;
2183 }
2184
2185
2186
2187 /**
2188  * Blit rectangular region, optionally from one framebuffer to another.
2189  *
2190  * Note, if the src buffer is multisampled and the dest is not, this is
2191  * when the samples must be resolved to a single color.
2192  */
2193 void GLAPIENTRY
2194 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2195                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2196                          GLbitfield mask, GLenum filter)
2197 {
2198    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2199                                      GL_DEPTH_BUFFER_BIT |
2200                                      GL_STENCIL_BUFFER_BIT);
2201    const struct gl_framebuffer *readFb, *drawFb;
2202    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2203    GET_CURRENT_CONTEXT(ctx);
2204
2205    ASSERT_OUTSIDE_BEGIN_END(ctx);
2206    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2207
2208    if (ctx->NewState) {
2209       _mesa_update_state(ctx);
2210    }
2211
2212    readFb = ctx->ReadBuffer;
2213    drawFb = ctx->DrawBuffer;
2214
2215    if (!readFb || !drawFb) {
2216       /* This will normally never happen but someday we may want to
2217        * support MakeCurrent() with no drawables.
2218        */
2219       return;
2220    }
2221
2222    /* check for complete framebuffers */
2223    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2224        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2225       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2226                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2227       return;
2228    }
2229
2230    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2231       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2232       return;
2233    }
2234
2235    if (mask & ~legalMaskBits) {
2236       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2237       return;
2238    }
2239
2240    /* depth/stencil must be blitted with nearest filtering */
2241    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2242         && filter != GL_NEAREST) {
2243       _mesa_error(ctx, GL_INVALID_OPERATION,
2244              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2245       return;
2246    }
2247
2248    /* get color read/draw renderbuffers */
2249    if (mask & GL_COLOR_BUFFER_BIT) {
2250       colorReadRb = readFb->_ColorReadBuffer;
2251       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2252    }
2253    else {
2254       colorReadRb = colorDrawRb = NULL;
2255    }
2256
2257    if (mask & GL_STENCIL_BUFFER_BIT) {
2258       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2259       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2260       if (!readRb ||
2261           !drawRb ||
2262           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2263           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2264          _mesa_error(ctx, GL_INVALID_OPERATION,
2265                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2266          return;
2267       }
2268    }
2269
2270    if (mask & GL_DEPTH_BUFFER_BIT) {
2271       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2272       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2273       if (!readRb ||
2274           !drawRb ||
2275           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2276           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2277          _mesa_error(ctx, GL_INVALID_OPERATION,
2278                      "glBlitFramebufferEXT(depth buffer size mismatch");
2279          return;
2280       }
2281    }
2282
2283    if (readFb->Visual.samples > 0 &&
2284        drawFb->Visual.samples > 0 &&
2285        readFb->Visual.samples != drawFb->Visual.samples) {
2286       _mesa_error(ctx, GL_INVALID_OPERATION,
2287                   "glBlitFramebufferEXT(mismatched samples");
2288       return;
2289    }
2290
2291    /* extra checks for multisample copies... */
2292    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2293       /* src and dest region sizes must be the same */
2294       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2295           srcY1 - srcY0 != dstY1 - dstY0) {
2296          _mesa_error(ctx, GL_INVALID_OPERATION,
2297                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2298          return;
2299       }
2300
2301       /* color formats must match */
2302       if (colorReadRb &&
2303           colorDrawRb &&
2304           colorReadRb->Format != colorDrawRb->Format) {
2305          _mesa_error(ctx, GL_INVALID_OPERATION,
2306                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2307          return;
2308       }
2309    }
2310
2311    if (!ctx->Extensions.EXT_framebuffer_blit) {
2312       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2313       return;
2314    }
2315
2316    /* Debug code */
2317    if (DEBUG_BLIT) {
2318       printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2319              " 0x%x, 0x%x)\n",
2320              srcX0, srcY0, srcX1, srcY1,
2321              dstX0, dstY0, dstX1, dstY1,
2322              mask, filter);
2323       if (colorReadRb) {
2324          const struct gl_renderbuffer_attachment *att;
2325
2326          att = find_attachment(readFb, colorReadRb);
2327          printf("  Src FBO %u  RB %u (%dx%d)  ",
2328                 readFb->Name, colorReadRb->Name,
2329                 colorReadRb->Width, colorReadRb->Height);
2330          if (att && att->Texture) {
2331             printf("Tex %u  tgt 0x%x  level %u  face %u",
2332                    att->Texture->Name,
2333                    att->Texture->Target,
2334                    att->TextureLevel,
2335                    att->CubeMapFace);
2336          }
2337          printf("\n");
2338
2339          att = find_attachment(drawFb, colorDrawRb);
2340          printf("  Dst FBO %u  RB %u (%dx%d)  ",
2341                 drawFb->Name, colorDrawRb->Name,
2342                 colorDrawRb->Width, colorDrawRb->Height);
2343          if (att && att->Texture) {
2344             printf("Tex %u  tgt 0x%x  level %u  face %u",
2345                    att->Texture->Name,
2346                    att->Texture->Target,
2347                    att->TextureLevel,
2348                    att->CubeMapFace);
2349          }
2350          printf("\n");
2351       }
2352    }
2353
2354    ASSERT(ctx->Driver.BlitFramebuffer);
2355    ctx->Driver.BlitFramebuffer(ctx,
2356                                srcX0, srcY0, srcX1, srcY1,
2357                                dstX0, dstY0, dstX1, dstY1,
2358                                mask, filter);
2359 }
2360 #endif /* FEATURE_EXT_framebuffer_blit */
2361
2362 #if FEATURE_ARB_geometry_shader4
2363 void GLAPIENTRY
2364 _mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
2365                             GLuint texture, GLint level)
2366 {
2367    GET_CURRENT_CONTEXT(ctx);
2368    _mesa_error(ctx, GL_INVALID_OPERATION,
2369                "glFramebufferTextureARB "
2370                "not implemented!");
2371 }
2372
2373 void GLAPIENTRY
2374 _mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
2375                                 GLuint texture, GLint level, GLenum face)
2376 {
2377    GET_CURRENT_CONTEXT(ctx);
2378    _mesa_error(ctx, GL_INVALID_OPERATION,
2379                "glFramebufferTextureFaceARB "
2380                "not implemented!");
2381 }
2382 #endif /* FEATURE_ARB_geometry_shader4 */