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