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 "mfeatures.h"
  44 #include "mtypes.h"
  45 #include "renderbuffer.h"
  46 #include "state.h"
  47 #include "teximage.h"
  48 #include "texobj.h"
  49
  50
  51 /** Set this to 1 to help debug FBO incompleteness problems */
  52 #define DEBUG_FBO 0
  53
  54 /** Set this to 1 to debug/log glBlitFramebuffer() calls */
  55 #define DEBUG_BLIT 0
  56
  57
  58 /**
  59  * Notes:
  60  *
  61  * None of the GL_EXT_framebuffer_object functions are compiled into
  62  * display lists.
  63  */
  64
  65
  66
  67 /*
  68  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  69  * these placeholder objects into the hash table.
  70  * Later, when the object ID is first bound, we replace the placeholder
  71  * with the real frame/renderbuffer.
  72  */
  73 static struct gl_framebuffer DummyFramebuffer;
  74 static struct gl_renderbuffer DummyRenderbuffer;
  75
  76 /* We bind this framebuffer when applications pass a NULL
  77  * drawable/surface in make current. */
  78 static struct gl_framebuffer IncompleteFramebuffer;
  79
  80
  81 #define IS_CUBE_FACE(TARGET) \
  82    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  83     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  84
  85
  86 static void
  87 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  88 {
  89    /* no op */
  90 }
  91
  92 static void
  93 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  94 {
  95    /* no op */
  96 }
  97
  98
  99 void
 100 _mesa_init_fbobjects(struct gl_context *ctx)
 101 {
 102    _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);
 103    _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);
 104    _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);
 105    DummyFramebuffer.Delete = delete_dummy_framebuffer;
 106    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
 107    IncompleteFramebuffer.Delete = delete_dummy_framebuffer;
 108 }
 109
 110 struct gl_framebuffer *
 111 _mesa_get_incomplete_framebuffer(void)
 112 {
 113    return &IncompleteFramebuffer;
 114 }
 115
 116 /**
 117  * Helper routine for getting a gl_renderbuffer.
 118  */
 119 struct gl_renderbuffer *
 120 _mesa_lookup_renderbuffer(struct gl_context *ctx, GLuint id)
 121 {
 122    struct gl_renderbuffer *rb;
 123
 124    if (id == 0)
 125       return NULL;
 126
 127    rb = (struct gl_renderbuffer *)
 128       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 129    return rb;
 130 }
 131
 132
 133 /**
 134  * Helper routine for getting a gl_framebuffer.
 135  */
 136 struct gl_framebuffer *
 137 _mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)
 138 {
 139    struct gl_framebuffer *fb;
 140
 141    if (id == 0)
 142       return NULL;
 143
 144    fb = (struct gl_framebuffer *)
 145       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 146    return fb;
 147 }
 148
 149
 150 /**
 151  * Mark the given framebuffer as invalid.  This will force the
 152  * test for framebuffer completeness to be done before the framebuffer
 153  * is used.
 154  */
 155 static void
 156 invalidate_framebuffer(struct gl_framebuffer *fb)
 157 {
 158    fb->_Status = 0; /* "indeterminate" */
 159 }
 160
 161
 162 /**
 163  * Return the gl_framebuffer object which corresponds to the given
 164  * framebuffer target, such as GL_DRAW_FRAMEBUFFER.
 165  * Check support for GL_EXT_framebuffer_blit to determine if certain
 166  * targets are legal.
 167  * \return gl_framebuffer pointer or NULL if target is illegal
 168  */
 169 static struct gl_framebuffer *
 170 get_framebuffer_target(struct gl_context *ctx, GLenum target)
 171 {
 172    switch (target) {
 173    case GL_DRAW_FRAMEBUFFER:
 174       return ctx->Extensions.EXT_framebuffer_blit ? ctx->DrawBuffer : NULL;
 175    case GL_READ_FRAMEBUFFER:
 176       return ctx->Extensions.EXT_framebuffer_blit ? ctx->ReadBuffer : NULL;
 177    case GL_FRAMEBUFFER_EXT:
 178       return ctx->DrawBuffer;
 179    default:
 180       return NULL;
 181    }
 182 }
 183
 184
 185 /**
 186  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 187  * gl_renderbuffer_attachment object.
 188  * This function is only used for user-created FB objects, not the
 189  * default / window-system FB object.
 190  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 191  * the depth buffer attachment point.
 192  */
 193 struct gl_renderbuffer_attachment *
 194 _mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 195                      GLenum attachment)
 196 {
 197    GLuint i;
 198
 199    assert(fb->Name > 0);
 200
 201    switch (attachment) {
 202    case GL_COLOR_ATTACHMENT0_EXT:
 203    case GL_COLOR_ATTACHMENT1_EXT:
 204    case GL_COLOR_ATTACHMENT2_EXT:
 205    case GL_COLOR_ATTACHMENT3_EXT:
 206    case GL_COLOR_ATTACHMENT4_EXT:
 207    case GL_COLOR_ATTACHMENT5_EXT:
 208    case GL_COLOR_ATTACHMENT6_EXT:
 209    case GL_COLOR_ATTACHMENT7_EXT:
 210    case GL_COLOR_ATTACHMENT8_EXT:
 211    case GL_COLOR_ATTACHMENT9_EXT:
 212    case GL_COLOR_ATTACHMENT10_EXT:
 213    case GL_COLOR_ATTACHMENT11_EXT:
 214    case GL_COLOR_ATTACHMENT12_EXT:
 215    case GL_COLOR_ATTACHMENT13_EXT:
 216    case GL_COLOR_ATTACHMENT14_EXT:
 217    case GL_COLOR_ATTACHMENT15_EXT:
 218       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 219       if (i >= ctx->Const.MaxColorAttachments) {
 220          return NULL;
 221       }
 222       return &fb->Attachment[BUFFER_COLOR0 + i];
 223    case GL_DEPTH_STENCIL_ATTACHMENT:
 224       /* fall-through */
 225    case GL_DEPTH_BUFFER:
 226       /* fall-through / new in GL 3.0 */
 227    case GL_DEPTH_ATTACHMENT_EXT:
 228       return &fb->Attachment[BUFFER_DEPTH];
 229    case GL_STENCIL_BUFFER:
 230       /* fall-through / new in GL 3.0 */
 231    case GL_STENCIL_ATTACHMENT_EXT:
 232       return &fb->Attachment[BUFFER_STENCIL];
 233    default:
 234       return NULL;
 235    }
 236 }
 237
 238
 239 /**
 240  * As above, but only used for getting attachments of the default /
 241  * window-system framebuffer (not user-created framebuffer objects).
 242  */
 243 static struct gl_renderbuffer_attachment *
 244 _mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 245                          GLenum attachment)
 246 {
 247    assert(fb->Name == 0);
 248
 249    switch (attachment) {
 250    case GL_FRONT_LEFT:
 251       return &fb->Attachment[BUFFER_FRONT_LEFT];
 252    case GL_FRONT_RIGHT:
 253       return &fb->Attachment[BUFFER_FRONT_RIGHT];
 254    case GL_BACK_LEFT:
 255       return &fb->Attachment[BUFFER_BACK_LEFT];
 256    case GL_BACK_RIGHT:
 257       return &fb->Attachment[BUFFER_BACK_RIGHT];
 258    case GL_AUX0:
 259       if (fb->Visual.numAuxBuffers == 1) {
 260          return &fb->Attachment[BUFFER_AUX0];
 261       }
 262       return NULL;
 263    case GL_DEPTH_BUFFER:
 264       /* fall-through / new in GL 3.0 */
 265    case GL_DEPTH_ATTACHMENT_EXT:
 266       return &fb->Attachment[BUFFER_DEPTH];
 267    case GL_STENCIL_BUFFER:
 268       /* fall-through / new in GL 3.0 */
 269    case GL_STENCIL_ATTACHMENT_EXT:
 270       return &fb->Attachment[BUFFER_STENCIL];
 271    default:
 272       return NULL;
 273    }
 274 }
 275
 276
 277
 278 /**
 279  * Remove any texture or renderbuffer attached to the given attachment
 280  * point.  Update reference counts, etc.
 281  */
 282 void
 283 _mesa_remove_attachment(struct gl_context *ctx,
 284                         struct gl_renderbuffer_attachment *att)
 285 {
 286    if (att->Type == GL_TEXTURE) {
 287       ASSERT(att->Texture);
 288       if (ctx->Driver.FinishRenderTexture) {
 289          /* tell driver that we're done rendering to this texture. */
 290          ctx->Driver.FinishRenderTexture(ctx, att);
 291       }
 292       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 293       ASSERT(!att->Texture);
 294    }
 295    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 296       ASSERT(!att->Texture);
 297       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 298       ASSERT(!att->Renderbuffer);
 299    }
 300    att->Type = GL_NONE;
 301    att->Complete = GL_TRUE;
 302 }
 303
 304
 305 /**
 306  * Bind a texture object to an attachment point.
 307  * The previous binding, if any, will be removed first.
 308  */
 309 void
 310 _mesa_set_texture_attachment(struct gl_context *ctx,
 311                              struct gl_framebuffer *fb,
 312                              struct gl_renderbuffer_attachment *att,
 313                              struct gl_texture_object *texObj,
 314                              GLenum texTarget, GLuint level, GLuint zoffset)
 315 {
 316    if (att->Texture == texObj) {
 317       /* re-attaching same texture */
 318       ASSERT(att->Type == GL_TEXTURE);
 319       if (ctx->Driver.FinishRenderTexture)
 320          ctx->Driver.FinishRenderTexture(ctx, att);
 321    }
 322    else {
 323       /* new attachment */
 324       if (ctx->Driver.FinishRenderTexture && att->Texture)
 325          ctx->Driver.FinishRenderTexture(ctx, att);
 326       _mesa_remove_attachment(ctx, att);
 327       att->Type = GL_TEXTURE;
 328       assert(!att->Texture);
 329       _mesa_reference_texobj(&att->Texture, texObj);
 330    }
 331
 332    /* always update these fields */
 333    att->TextureLevel = level;
 334    att->CubeMapFace = _mesa_tex_target_to_face(texTarget);
 335    att->Zoffset = zoffset;
 336    att->Complete = GL_FALSE;
 337
 338    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 339       ctx->Driver.RenderTexture(ctx, fb, att);
 340    }
 341
 342    invalidate_framebuffer(fb);
 343 }
 344
 345
 346 /**
 347  * Bind a renderbuffer to an attachment point.
 348  * The previous binding, if any, will be removed first.
 349  */
 350 void
 351 _mesa_set_renderbuffer_attachment(struct gl_context *ctx,
 352                                   struct gl_renderbuffer_attachment *att,
 353                                   struct gl_renderbuffer *rb)
 354 {
 355    /* XXX check if re-doing same attachment, exit early */
 356    _mesa_remove_attachment(ctx, att);
 357    att->Type = GL_RENDERBUFFER_EXT;
 358    att->Texture = NULL; /* just to be safe */
 359    att->Complete = GL_FALSE;
 360    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 361 }
 362
 363
 364 /**
 365  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 366  * Attach a renderbuffer object to a framebuffer object.
 367  */
 368 void
 369 _mesa_framebuffer_renderbuffer(struct gl_context *ctx,
 370                                struct gl_framebuffer *fb,
 371                                GLenum attachment, struct gl_renderbuffer *rb)
 372 {
 373    struct gl_renderbuffer_attachment *att;
 374
 375    _glthread_LOCK_MUTEX(fb->Mutex);
 376
 377    att = _mesa_get_attachment(ctx, fb, attachment);
 378    ASSERT(att);
 379    if (rb) {
 380       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 381       if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
 382          /* do stencil attachment here (depth already done above) */
 383          att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
 384          assert(att);
 385          _mesa_set_renderbuffer_attachment(ctx, att, rb);
 386       }
 387       rb->AttachedAnytime = GL_TRUE;
 388    }
 389    else {
 390       _mesa_remove_attachment(ctx, att);
 391    }
 392
 393    invalidate_framebuffer(fb);
 394
 395    _glthread_UNLOCK_MUTEX(fb->Mutex);
 396 }
 397
 398
 399 /**
 400  * Fallback for ctx->Driver.ValidateFramebuffer()
 401  * Check if the renderbuffer's formats are supported by the software
 402  * renderer.
 403  * Drivers should probably override this.
 404  */
 405 void
 406 _mesa_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
 407 {
 408    gl_buffer_index buf;
 409    for (buf = 0; buf < BUFFER_COUNT; buf++) {
 410       const struct gl_renderbuffer *rb = fb->Attachment[buf].Renderbuffer;
 411       if (rb) {
 412          switch (rb->_BaseFormat) {
 413          case GL_ALPHA:
 414          case GL_LUMINANCE_ALPHA:
 415          case GL_LUMINANCE:
 416          case GL_INTENSITY:
 417          case GL_RED:
 418          case GL_RG:
 419             fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED;
 420             return;
 421          default:
 422             /* render buffer format is supported by software rendering */
 423             ;
 424          }
 425       }
 426    }
 427 }
 428
 429
 430 /**
 431  * For debug only.
 432  */
 433 static void
 434 att_incomplete(const char *msg)
 435 {
 436 #if DEBUG_FBO
 437    _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
 438 #else
 439    (void) msg;
 440 #endif
 441 }
 442
 443
 444 /**
 445  * For debug only.
 446  */
 447 static void
 448 fbo_incomplete(const char *msg, int index)
 449 {
 450 #if DEBUG_FBO
 451    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 452 #else
 453    (void) msg;
 454    (void) index;
 455 #endif
 456 }
 457
 458
 459 /**
 460  * Is the given base format a legal format for a color renderbuffer?
 461  */
 462 GLboolean
 463 _mesa_is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)
 464 {
 465    switch (baseFormat) {
 466    case GL_RGB:
 467    case GL_RGBA:
 468       return GL_TRUE;
 469    case GL_LUMINANCE:
 470    case GL_LUMINANCE_ALPHA:
 471    case GL_INTENSITY:
 472    case GL_ALPHA:
 473       return ctx->Extensions.ARB_framebuffer_object;
 474    case GL_RED:
 475    case GL_RG:
 476       return ctx->Extensions.ARB_texture_rg;
 477    default:
 478       return GL_FALSE;
 479    }
 480 }
 481
 482
 483 /**
 484  * Is the given base format a legal format for a depth/stencil renderbuffer?
 485  */
 486 static GLboolean
 487 is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)
 488 {
 489    switch (baseFormat) {
 490    case GL_DEPTH_COMPONENT:
 491    case GL_DEPTH_STENCIL_EXT:
 492       return GL_TRUE;
 493    default:
 494       return GL_FALSE;
 495    }
 496 }
 497
 498
 499 /**
 500  * Test if an attachment point is complete and update its Complete field.
 501  * \param format if GL_COLOR, this is a color attachment point,
 502  *               if GL_DEPTH, this is a depth component attachment point,
 503  *               if GL_STENCIL, this is a stencil component attachment point.
 504  */
 505 static void
 506 test_attachment_completeness(const struct gl_context *ctx, GLenum format,
 507                              struct gl_renderbuffer_attachment *att)
 508 {
 509    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 510
 511    /* assume complete */
 512    att->Complete = GL_TRUE;
 513
 514    /* Look for reasons why the attachment might be incomplete */
 515    if (att->Type == GL_TEXTURE) {
 516       const struct gl_texture_object *texObj = att->Texture;
 517       struct gl_texture_image *texImage;
 518       GLenum baseFormat;
 519
 520       if (!texObj) {
 521          att_incomplete("no texobj");
 522          att->Complete = GL_FALSE;
 523          return;
 524       }
 525
 526       texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
 527       if (!texImage) {
 528          att_incomplete("no teximage");
 529          att->Complete = GL_FALSE;
 530          return;
 531       }
 532       if (texImage->Width < 1 || texImage->Height < 1) {
 533          att_incomplete("teximage width/height=0");
 534          printf("texobj = %u\n", texObj->Name);
 535          printf("level = %d\n", att->TextureLevel);
 536          att->Complete = GL_FALSE;
 537          return;
 538       }
 539       if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
 540          att_incomplete("bad z offset");
 541          att->Complete = GL_FALSE;
 542          return;
 543       }
 544
 545       baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
 546
 547       if (format == GL_COLOR) {
 548          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 549             att_incomplete("bad format");
 550             att->Complete = GL_FALSE;
 551             return;
 552          }
 553          if (_mesa_is_format_compressed(texImage->TexFormat)) {
 554             att_incomplete("compressed internalformat");
 555             att->Complete = GL_FALSE;
 556             return;
 557          }
 558       }
 559       else if (format == GL_DEPTH) {
 560          if (baseFormat == GL_DEPTH_COMPONENT) {
 561             /* OK */
 562          }
 563          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 564                   ctx->Extensions.ARB_depth_texture &&
 565                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 566             /* OK */
 567          }
 568          else {
 569             att->Complete = GL_FALSE;
 570             att_incomplete("bad depth format");
 571             return;
 572          }
 573       }
 574       else {
 575          ASSERT(format == GL_STENCIL);
 576          if (ctx->Extensions.EXT_packed_depth_stencil &&
 577              ctx->Extensions.ARB_depth_texture &&
 578              baseFormat == GL_DEPTH_STENCIL_EXT) {
 579             /* OK */
 580          }
 581          else {
 582             /* no such thing as stencil-only textures */
 583             att_incomplete("illegal stencil texture");
 584             att->Complete = GL_FALSE;
 585             return;
 586          }
 587       }
 588    }
 589    else if (att->Type == GL_RENDERBUFFER_EXT) {
 590       const GLenum baseFormat =
 591          _mesa_get_format_base_format(att->Renderbuffer->Format);
 592
 593       ASSERT(att->Renderbuffer);
 594       if (!att->Renderbuffer->InternalFormat ||
 595           att->Renderbuffer->Width < 1 ||
 596           att->Renderbuffer->Height < 1) {
 597          att_incomplete("0x0 renderbuffer");
 598          att->Complete = GL_FALSE;
 599          return;
 600       }
 601       if (format == GL_COLOR) {
 602          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 603             att_incomplete("bad renderbuffer color format");
 604             att->Complete = GL_FALSE;
 605             return;
 606          }
 607       }
 608       else if (format == GL_DEPTH) {
 609          if (baseFormat == GL_DEPTH_COMPONENT) {
 610             /* OK */
 611          }
 612          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 613                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 614             /* OK */
 615          }
 616          else {
 617             att_incomplete("bad renderbuffer depth format");
 618             att->Complete = GL_FALSE;
 619             return;
 620          }
 621       }
 622       else {
 623          assert(format == GL_STENCIL);
 624          if (baseFormat == GL_STENCIL_INDEX) {
 625             /* OK */
 626          }
 627          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 628                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 629             /* OK */
 630          }
 631          else {
 632             att->Complete = GL_FALSE;
 633             att_incomplete("bad renderbuffer stencil format");
 634             return;
 635          }
 636       }
 637    }
 638    else {
 639       ASSERT(att->Type == GL_NONE);
 640       /* complete */
 641       return;
 642    }
 643 }
 644
 645
 646 /**
 647  * Test if the given framebuffer object is complete and update its
 648  * Status field with the results.
 649  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 650  * driver to make hardware-specific validation/completeness checks.
 651  * Also update the framebuffer's Width and Height fields if the
 652  * framebuffer is complete.
 653  */
 654 void
 655 _mesa_test_framebuffer_completeness(struct gl_context *ctx,
 656                                     struct gl_framebuffer *fb)
 657 {
 658    GLuint numImages;
 659    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 660    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 661    GLint numSamples = -1;
 662    GLint i;
 663    GLuint j;
 664
 665    assert(fb->Name != 0);
 666
 667    numImages = 0;
 668    fb->Width = 0;
 669    fb->Height = 0;
 670
 671    /* Start at -2 to more easily loop over all attachment points.
 672     *  -2: depth buffer
 673     *  -1: stencil buffer
 674     * >=0: color buffer
 675     */
 676    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 677       struct gl_renderbuffer_attachment *att;
 678       GLenum f;
 679       gl_format attFormat;
 680
 681       /*
 682        * XXX for ARB_fbo, only check color buffers that are named by
 683        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 684        */
 685
 686       /* check for attachment completeness
 687        */
 688       if (i == -2) {
 689          att = &fb->Attachment[BUFFER_DEPTH];
 690          test_attachment_completeness(ctx, GL_DEPTH, att);
 691          if (!att->Complete) {
 692             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 693             fbo_incomplete("depth attachment incomplete", -1);
 694             return;
 695          }
 696       }
 697       else if (i == -1) {
 698          att = &fb->Attachment[BUFFER_STENCIL];
 699          test_attachment_completeness(ctx, GL_STENCIL, att);
 700          if (!att->Complete) {
 701             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 702             fbo_incomplete("stencil attachment incomplete", -1);
 703             return;
 704          }
 705       }
 706       else {
 707          att = &fb->Attachment[BUFFER_COLOR0 + i];
 708          test_attachment_completeness(ctx, GL_COLOR, att);
 709          if (!att->Complete) {
 710             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 711             fbo_incomplete("color attachment incomplete", i);
 712             return;
 713          }
 714       }
 715
 716       /* get width, height, format of the renderbuffer/texture
 717        */
 718       if (att->Type == GL_TEXTURE) {
 719          const struct gl_texture_image *texImg
 720             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 721          minWidth = MIN2(minWidth, texImg->Width);
 722          maxWidth = MAX2(maxWidth, texImg->Width);
 723          minHeight = MIN2(minHeight, texImg->Height);
 724          maxHeight = MAX2(maxHeight, texImg->Height);
 725          f = texImg->_BaseFormat;
 726          attFormat = texImg->TexFormat;
 727          numImages++;
 728          if (!_mesa_is_legal_color_format(ctx, f) &&
 729              !is_legal_depth_format(ctx, f)) {
 730             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 731             fbo_incomplete("texture attachment incomplete", -1);
 732             return;
 733          }
 734       }
 735       else if (att->Type == GL_RENDERBUFFER_EXT) {
 736          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 737          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 738          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 739          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 740          f = att->Renderbuffer->InternalFormat;
 741          attFormat = att->Renderbuffer->Format;
 742          numImages++;
 743       }
 744       else {
 745          assert(att->Type == GL_NONE);
 746          continue;
 747       }
 748
 749       if (numSamples < 0) {
 750          /* first buffer */
 751          numSamples = att->Renderbuffer->NumSamples;
 752       }
 753
 754       /* check if integer color */
 755       fb->_IntegerColor = _mesa_is_format_integer_color(attFormat);
 756
 757       /* Error-check width, height, format, samples
 758        */
 759       if (numImages == 1) {
 760          /* save format, num samples */
 761          if (i >= 0) {
 762             intFormat = f;
 763          }
 764       }
 765       else {
 766          if (!ctx->Extensions.ARB_framebuffer_object) {
 767             /* check that width, height, format are same */
 768             if (minWidth != maxWidth || minHeight != maxHeight) {
 769                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 770                fbo_incomplete("width or height mismatch", -1);
 771                return;
 772             }
 773             /* check that all color buffer have same format */
 774             if (intFormat != GL_NONE && f != intFormat) {
 775                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 776                fbo_incomplete("format mismatch", -1);
 777                return;
 778             }
 779          }
 780          if (att->Renderbuffer &&
 781              att->Renderbuffer->NumSamples != numSamples) {
 782             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 783             fbo_incomplete("inconsistant number of samples", i);
 784             return;
 785          }
 786
 787       }
 788    }
 789
 790 #if FEATURE_GL
 791    if (ctx->API == API_OPENGL) {
 792       /* Check that all DrawBuffers are present */
 793       for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 794          if (fb->ColorDrawBuffer[j] != GL_NONE) {
 795             const struct gl_renderbuffer_attachment *att
 796                = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 797             assert(att);
 798             if (att->Type == GL_NONE) {
 799                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 800                fbo_incomplete("missing drawbuffer", j);
 801                return;
 802             }
 803          }
 804       }
 805
 806       /* Check that the ReadBuffer is present */
 807       if (fb->ColorReadBuffer != GL_NONE) {
 808          const struct gl_renderbuffer_attachment *att
 809             = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 810          assert(att);
 811          if (att->Type == GL_NONE) {
 812             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 813             fbo_incomplete("missing readbuffer", -1);
 814             return;
 815          }
 816       }
 817    }
 818 #else
 819    (void) j;
 820 #endif
 821
 822    if (numImages == 0) {
 823       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 824       fbo_incomplete("no attachments", -1);
 825       return;
 826    }
 827
 828    /* Provisionally set status = COMPLETE ... */
 829    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 830
 831    /* ... but the driver may say the FB is incomplete.
 832     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 833     * if anything.
 834     */
 835    if (ctx->Driver.ValidateFramebuffer) {
 836       ctx->Driver.ValidateFramebuffer(ctx, fb);
 837       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 838          fbo_incomplete("driver marked FBO as incomplete", -1);
 839       }
 840    }
 841
 842    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 843       /*
 844        * Note that if ARB_framebuffer_object is supported and the attached
 845        * renderbuffers/textures are different sizes, the framebuffer
 846        * width/height will be set to the smallest width/height.
 847        */
 848       fb->Width = minWidth;
 849       fb->Height = minHeight;
 850
 851       /* finally, update the visual info for the framebuffer */
 852       _mesa_update_framebuffer_visual(ctx, fb);
 853    }
 854 }
 855
 856
 857 GLboolean GLAPIENTRY
 858 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 859 {
 860    GET_CURRENT_CONTEXT(ctx);
 861    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 862    if (renderbuffer) {
 863       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 864       if (rb != NULL && rb != &DummyRenderbuffer)
 865          return GL_TRUE;
 866    }
 867    return GL_FALSE;
 868 }
 869
 870
 871 void GLAPIENTRY
 872 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 873 {
 874    struct gl_renderbuffer *newRb;
 875    GET_CURRENT_CONTEXT(ctx);
 876
 877    ASSERT_OUTSIDE_BEGIN_END(ctx);
 878
 879    if (target != GL_RENDERBUFFER_EXT) {
 880       _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
 881       return;
 882    }
 883
 884    /* No need to flush here since the render buffer binding has no
 885     * effect on rendering state.
 886     */
 887
 888    if (renderbuffer) {
 889       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 890       if (newRb == &DummyRenderbuffer) {
 891          /* ID was reserved, but no real renderbuffer object made yet */
 892          newRb = NULL;
 893       }
 894       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 895          /* All RB IDs must be Gen'd */
 896          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 897          return;
 898       }
 899
 900       if (!newRb) {
 901          /* create new renderbuffer object */
 902          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 903          if (!newRb) {
 904             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 905             return;
 906          }
 907          ASSERT(newRb->AllocStorage);
 908          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 909          newRb->RefCount = 1; /* referenced by hash table */
 910       }
 911    }
 912    else {
 913       newRb = NULL;
 914    }
 915
 916    ASSERT(newRb != &DummyRenderbuffer);
 917
 918    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 919 }
 920
 921
 922 /**
 923  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 924  * the renderbuffer.
 925  * This is used when a renderbuffer object is deleted.
 926  * The spec calls for unbinding.
 927  */
 928 static void
 929 detach_renderbuffer(struct gl_context *ctx,
 930                     struct gl_framebuffer *fb,
 931                     struct gl_renderbuffer *rb)
 932 {
 933    GLuint i;
 934    for (i = 0; i < BUFFER_COUNT; i++) {
 935       if (fb->Attachment[i].Renderbuffer == rb) {
 936          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 937       }
 938    }
 939    invalidate_framebuffer(fb);
 940 }
 941
 942
 943 void GLAPIENTRY
 944 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 945 {
 946    GLint i;
 947    GET_CURRENT_CONTEXT(ctx);
 948
 949    ASSERT_OUTSIDE_BEGIN_END(ctx);
 950    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 951
 952    for (i = 0; i < n; i++) {
 953       if (renderbuffers[i] > 0) {
 954          struct gl_renderbuffer *rb;
 955          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 956          if (rb) {
 957             /* check if deleting currently bound renderbuffer object */
 958             if (rb == ctx->CurrentRenderbuffer) {
 959                /* bind default */
 960                ASSERT(rb->RefCount >= 2);
 961                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 962             }
 963
 964             if (ctx->DrawBuffer->Name) {
 965                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 966             }
 967             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 968                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 969             }
 970
 971             /* Remove from hash table immediately, to free the ID.
 972              * But the object will not be freed until it's no longer
 973              * referenced anywhere else.
 974              */
 975             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 976
 977             if (rb != &DummyRenderbuffer) {
 978                /* no longer referenced by hash table */
 979                _mesa_reference_renderbuffer(&rb, NULL);
 980             }
 981          }
 982       }
 983    }
 984 }
 985
 986
 987 void GLAPIENTRY
 988 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 989 {
 990    GET_CURRENT_CONTEXT(ctx);
 991    GLuint first;
 992    GLint i;
 993
 994    ASSERT_OUTSIDE_BEGIN_END(ctx);
 995
 996    if (n < 0) {
 997       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 998       return;
 999    }
1000
1001    if (!renderbuffers)
1002       return;
1003
1004    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
1005
1006    for (i = 0; i < n; i++) {
1007       GLuint name = first + i;
1008       renderbuffers[i] = name;
1009       /* insert dummy placeholder into hash table */
1010       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1011       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
1012       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1013    }
1014 }
1015
1016
1017 /**
1018  * Given an internal format token for a render buffer, return the
1019  * corresponding base format (one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX,
1020  * GL_DEPTH_COMPONENT, GL_DEPTH_STENCIL_EXT, GL_ALPHA, GL_LUMINANCE,
1021  * GL_LUMINANCE_ALPHA, GL_INTENSITY, etc).
1022  *
1023  * This is similar to _mesa_base_tex_format() but the set of valid
1024  * internal formats is different.
1025  *
1026  * Note that even if a format is determined to be legal here, validation
1027  * of the FBO may fail if the format is not supported by the driver/GPU.
1028  *
1029  * \param internalFormat  as passed to glRenderbufferStorage()
1030  * \return the base internal format, or 0 if internalFormat is illegal
1031  */
1032 GLenum
1033 _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
1034 {
1035    /*
1036     * Notes: some formats such as alpha, luminance, etc. were added
1037     * with GL_ARB_framebuffer_object.
1038     */
1039    switch (internalFormat) {
1040    case GL_ALPHA:
1041    case GL_ALPHA4:
1042    case GL_ALPHA8:
1043    case GL_ALPHA12:
1044    case GL_ALPHA16:
1045       return ctx->Extensions.ARB_framebuffer_object ? GL_ALPHA : 0;
1046    case GL_LUMINANCE:
1047    case GL_LUMINANCE4:
1048    case GL_LUMINANCE8:
1049    case GL_LUMINANCE12:
1050    case GL_LUMINANCE16:
1051       return ctx->Extensions.ARB_framebuffer_object ? GL_LUMINANCE : 0;
1052    case GL_LUMINANCE_ALPHA:
1053    case GL_LUMINANCE4_ALPHA4:
1054    case GL_LUMINANCE6_ALPHA2:
1055    case GL_LUMINANCE8_ALPHA8:
1056    case GL_LUMINANCE12_ALPHA4:
1057    case GL_LUMINANCE12_ALPHA12:
1058    case GL_LUMINANCE16_ALPHA16:
1059       return ctx->Extensions.ARB_framebuffer_object ? GL_LUMINANCE_ALPHA : 0;
1060    case GL_INTENSITY:
1061    case GL_INTENSITY4:
1062    case GL_INTENSITY8:
1063    case GL_INTENSITY12:
1064    case GL_INTENSITY16:
1065       return ctx->Extensions.ARB_framebuffer_object ? GL_INTENSITY : 0;
1066    case GL_RGB:
1067    case GL_R3_G3_B2:
1068    case GL_RGB4:
1069    case GL_RGB5:
1070    case GL_RGB8:
1071    case GL_RGB10:
1072    case GL_RGB12:
1073    case GL_RGB16:
1074    case GL_SRGB8_EXT:
1075       return GL_RGB;
1076    case GL_RGBA:
1077    case GL_RGBA2:
1078    case GL_RGBA4:
1079    case GL_RGB5_A1:
1080    case GL_RGBA8:
1081    case GL_RGB10_A2:
1082    case GL_RGBA12:
1083    case GL_RGBA16:
1084    case GL_RGBA16_SNORM:
1085    case GL_SRGB8_ALPHA8_EXT:
1086       return GL_RGBA;
1087    case GL_STENCIL_INDEX:
1088    case GL_STENCIL_INDEX1_EXT:
1089    case GL_STENCIL_INDEX4_EXT:
1090    case GL_STENCIL_INDEX8_EXT:
1091    case GL_STENCIL_INDEX16_EXT:
1092       return GL_STENCIL_INDEX;
1093    case GL_DEPTH_COMPONENT:
1094    case GL_DEPTH_COMPONENT16:
1095    case GL_DEPTH_COMPONENT24:
1096    case GL_DEPTH_COMPONENT32:
1097       return GL_DEPTH_COMPONENT;
1098    case GL_DEPTH_STENCIL_EXT:
1099    case GL_DEPTH24_STENCIL8_EXT:
1100       if (ctx->Extensions.EXT_packed_depth_stencil)
1101          return GL_DEPTH_STENCIL_EXT;
1102       else
1103          return 0;
1104    case GL_RED:
1105    case GL_R8:
1106    case GL_R16:
1107       return ctx->Extensions.ARB_texture_rg ? GL_RED : 0;
1108    case GL_RG:
1109    case GL_RG8:
1110    case GL_RG16:
1111       return ctx->Extensions.ARB_texture_rg ? GL_RG : 0;
1112    /* XXX add floating point and integer formats eventually */
1113    default:
1114       return 0;
1115    }
1116 }
1117
1118
1119 /**
1120  * Invalidate a renderbuffer attachment.  Called from _mesa_HashWalk().
1121  */
1122 static void
1123 invalidate_rb(GLuint key, void *data, void *userData)
1124 {
1125    struct gl_framebuffer *fb = (struct gl_framebuffer *) data;
1126    struct gl_renderbuffer *rb = (struct gl_renderbuffer *) userData;
1127
1128    /* If this is a user-created FBO */
1129    if (fb->Name) {
1130       GLuint i;
1131       for (i = 0; i < BUFFER_COUNT; i++) {
1132          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1133          if (att->Type == GL_RENDERBUFFER &&
1134              att->Renderbuffer == rb) {
1135             /* Mark fb status as indeterminate to force re-validation */
1136             fb->_Status = 0;
1137          }
1138       }
1139    }
1140 }
1141
1142
1143 /** sentinal value, see below */
1144 #define NO_SAMPLES 1000
1145
1146
1147 /**
1148  * Helper function used by _mesa_RenderbufferStorageEXT() and
1149  * _mesa_RenderbufferStorageMultisample().
1150  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
1151  */
1152 static void
1153 renderbuffer_storage(GLenum target, GLenum internalFormat,
1154                      GLsizei width, GLsizei height, GLsizei samples)
1155 {
1156    const char *func = samples == NO_SAMPLES ?
1157       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
1158    struct gl_renderbuffer *rb;
1159    GLenum baseFormat;
1160    GET_CURRENT_CONTEXT(ctx);
1161
1162    ASSERT_OUTSIDE_BEGIN_END(ctx);
1163
1164    if (target != GL_RENDERBUFFER_EXT) {
1165       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
1166       return;
1167    }
1168
1169    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
1170    if (baseFormat == 0) {
1171       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
1172       return;
1173    }
1174
1175    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1176       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
1177       return;
1178    }
1179
1180    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1181       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
1182       return;
1183    }
1184
1185    if (samples == NO_SAMPLES) {
1186       /* NumSamples == 0 indicates non-multisampling */
1187       samples = 0;
1188    }
1189    else if (samples > (GLsizei) ctx->Const.MaxSamples) {
1190       /* note: driver may choose to use more samples than what's requested */
1191       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
1192       return;
1193    }
1194
1195    rb = ctx->CurrentRenderbuffer;
1196    if (!rb) {
1197       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
1198       return;
1199    }
1200
1201    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1202
1203    if (rb->InternalFormat == internalFormat &&
1204        rb->Width == (GLuint) width &&
1205        rb->Height == (GLuint) height) {
1206       /* no change in allocation needed */
1207       return;
1208    }
1209
1210    /* These MUST get set by the AllocStorage func */
1211    rb->Format = MESA_FORMAT_NONE;
1212    rb->NumSamples = samples;
1213
1214    /* Now allocate the storage */
1215    ASSERT(rb->AllocStorage);
1216    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
1217       /* No error - check/set fields now */
1218       assert(rb->Format != MESA_FORMAT_NONE);
1219       assert(rb->Width == (GLuint) width);
1220       assert(rb->Height == (GLuint) height);
1221       rb->InternalFormat = internalFormat;
1222       rb->_BaseFormat = baseFormat;
1223       assert(rb->_BaseFormat != 0);
1224    }
1225    else {
1226       /* Probably ran out of memory - clear the fields */
1227       rb->Width = 0;
1228       rb->Height = 0;
1229       rb->Format = MESA_FORMAT_NONE;
1230       rb->InternalFormat = GL_NONE;
1231       rb->_BaseFormat = GL_NONE;
1232       rb->NumSamples = 0;
1233    }
1234
1235    /* Invalidate the framebuffers the renderbuffer is attached in. */
1236    if (rb->AttachedAnytime) {
1237       _mesa_HashWalk(ctx->Shared->FrameBuffers, invalidate_rb, rb);
1238    }
1239 }
1240
1241
1242 #if FEATURE_OES_EGL_image
1243 void GLAPIENTRY
1244 _mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
1245 {
1246    struct gl_renderbuffer *rb;
1247    GET_CURRENT_CONTEXT(ctx);
1248    ASSERT_OUTSIDE_BEGIN_END(ctx);
1249
1250    if (!ctx->Extensions.OES_EGL_image) {
1251       _mesa_error(ctx, GL_INVALID_OPERATION,
1252                   "glEGLImageTargetRenderbufferStorageOES(unsupported)");
1253       return;
1254    }
1255
1256    if (target != GL_RENDERBUFFER) {
1257       _mesa_error(ctx, GL_INVALID_ENUM,
1258                   "EGLImageTargetRenderbufferStorageOES");
1259       return;
1260    }
1261
1262    rb = ctx->CurrentRenderbuffer;
1263    if (!rb) {
1264       _mesa_error(ctx, GL_INVALID_OPERATION,
1265                   "EGLImageTargetRenderbufferStorageOES");
1266       return;
1267    }
1268
1269    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1270
1271    ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
1272 }
1273 #endif
1274
1275
1276 /**
1277  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1278  * _mesa_GetFramebufferAttachmentParameterivEXT()
1279  * We have to be careful to respect the base format.  For example, if a
1280  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1281  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1282  * we need to return zero.
1283  */
1284 static GLint
1285 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1286 {
1287    switch (pname) {
1288    case GL_RENDERBUFFER_RED_SIZE_EXT:
1289    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1290       if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
1291           baseFormat == GL_RG || baseFormat == GL_RED)
1292          return _mesa_get_format_bits(format, pname);
1293       else
1294          return 0;
1295    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1296    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1297       if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
1298          return _mesa_get_format_bits(format, pname);
1299       else
1300          return 0;
1301    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1302    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1303       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1304          return _mesa_get_format_bits(format, pname);
1305       else
1306          return 0;
1307    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1308    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1309       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
1310           baseFormat == GL_LUMINANCE_ALPHA)
1311          return _mesa_get_format_bits(format, pname);
1312       else
1313          return 0;
1314    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1315    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1316       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1317          return _mesa_get_format_bits(format, pname);
1318       else
1319          return 0;
1320    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1321    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1322       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1323          return _mesa_get_format_bits(format, pname);
1324       else
1325          return 0;
1326    default:
1327       return 0;
1328    }
1329 }
1330
1331
1332
1333 void GLAPIENTRY
1334 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1335                              GLsizei width, GLsizei height)
1336 {
1337    /* GL_ARB_fbo says calling this function is equivalent to calling
1338     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1339     * a token value here just for error reporting purposes.
1340     */
1341    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1342 }
1343
1344
1345 void GLAPIENTRY
1346 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1347                                      GLenum internalFormat,
1348                                      GLsizei width, GLsizei height)
1349 {
1350    renderbuffer_storage(target, internalFormat, width, height, samples);
1351 }
1352
1353
1354 /**
1355  * OpenGL ES version of glRenderBufferStorage.
1356  */
1357 void GLAPIENTRY
1358 _es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1359                            GLsizei width, GLsizei height)
1360 {
1361    switch (internalFormat) {
1362    case GL_RGB565:
1363       /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
1364       /* choose a closest format */
1365       internalFormat = GL_RGB5;
1366       break;
1367    default:
1368       break;
1369    }
1370
1371    renderbuffer_storage(target, internalFormat, width, height, 0);
1372 }
1373
1374
1375 void GLAPIENTRY
1376 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1377 {
1378    struct gl_renderbuffer *rb;
1379    GET_CURRENT_CONTEXT(ctx);
1380
1381    ASSERT_OUTSIDE_BEGIN_END(ctx);
1382
1383    if (target != GL_RENDERBUFFER_EXT) {
1384       _mesa_error(ctx, GL_INVALID_ENUM,
1385                   "glGetRenderbufferParameterivEXT(target)");
1386       return;
1387    }
1388
1389    rb = ctx->CurrentRenderbuffer;
1390    if (!rb) {
1391       _mesa_error(ctx, GL_INVALID_OPERATION,
1392                   "glGetRenderbufferParameterivEXT");
1393       return;
1394    }
1395
1396    /* No need to flush here since we're just quering state which is
1397     * not effected by rendering.
1398     */
1399
1400    switch (pname) {
1401    case GL_RENDERBUFFER_WIDTH_EXT:
1402       *params = rb->Width;
1403       return;
1404    case GL_RENDERBUFFER_HEIGHT_EXT:
1405       *params = rb->Height;
1406       return;
1407    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1408       *params = rb->InternalFormat;
1409       return;
1410    case GL_RENDERBUFFER_RED_SIZE_EXT:
1411    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1412    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1413    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1414    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1415    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1416       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1417       break;
1418    case GL_RENDERBUFFER_SAMPLES:
1419       if (ctx->Extensions.ARB_framebuffer_object) {
1420          *params = rb->NumSamples;
1421          break;
1422       }
1423       /* fallthrough */
1424    default:
1425       _mesa_error(ctx, GL_INVALID_ENUM,
1426                   "glGetRenderbufferParameterivEXT(target)");
1427       return;
1428    }
1429 }
1430
1431
1432 GLboolean GLAPIENTRY
1433 _mesa_IsFramebufferEXT(GLuint framebuffer)
1434 {
1435    GET_CURRENT_CONTEXT(ctx);
1436    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1437    if (framebuffer) {
1438       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1439       if (rb != NULL && rb != &DummyFramebuffer)
1440          return GL_TRUE;
1441    }
1442    return GL_FALSE;
1443 }
1444
1445
1446 /**
1447  * Check if any of the attachments of the given framebuffer are textures
1448  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1449  * attachments.
1450  */
1451 static void
1452 check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1453 {
1454    GLuint i;
1455    ASSERT(ctx->Driver.RenderTexture);
1456
1457    if (fb->Name == 0)
1458       return; /* can't render to texture with winsys framebuffers */
1459
1460    for (i = 0; i < BUFFER_COUNT; i++) {
1461       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1462       struct gl_texture_object *texObj = att->Texture;
1463       if (texObj
1464           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1465          ctx->Driver.RenderTexture(ctx, fb, att);
1466       }
1467    }
1468 }
1469
1470
1471 /**
1472  * Examine all the framebuffer's attachments to see if any are textures.
1473  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1474  * notify the device driver that the texture image may have changed.
1475  */
1476 static void
1477 check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1478 {
1479    if (fb->Name == 0)
1480       return; /* can't render to texture with winsys framebuffers */
1481
1482    if (ctx->Driver.FinishRenderTexture) {
1483       GLuint i;
1484       for (i = 0; i < BUFFER_COUNT; i++) {
1485          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1486          if (att->Texture && att->Renderbuffer) {
1487             ctx->Driver.FinishRenderTexture(ctx, att);
1488          }
1489       }
1490    }
1491 }
1492
1493
1494 void GLAPIENTRY
1495 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1496 {
1497    struct gl_framebuffer *newDrawFb, *newReadFb;
1498    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1499    GLboolean bindReadBuf, bindDrawBuf;
1500    GET_CURRENT_CONTEXT(ctx);
1501
1502 #ifdef DEBUG
1503    if (ctx->Extensions.ARB_framebuffer_object) {
1504       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1505       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1506    }
1507 #endif
1508
1509    ASSERT_OUTSIDE_BEGIN_END(ctx);
1510
1511    if (!ctx->Extensions.EXT_framebuffer_object) {
1512       _mesa_error(ctx, GL_INVALID_OPERATION,
1513                   "glBindFramebufferEXT(unsupported)");
1514       return;
1515    }
1516
1517    switch (target) {
1518 #if FEATURE_EXT_framebuffer_blit
1519    case GL_DRAW_FRAMEBUFFER_EXT:
1520       if (!ctx->Extensions.EXT_framebuffer_blit) {
1521          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1522          return;
1523       }
1524       bindDrawBuf = GL_TRUE;
1525       bindReadBuf = GL_FALSE;
1526       break;
1527    case GL_READ_FRAMEBUFFER_EXT:
1528       if (!ctx->Extensions.EXT_framebuffer_blit) {
1529          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1530          return;
1531       }
1532       bindDrawBuf = GL_FALSE;
1533       bindReadBuf = GL_TRUE;
1534       break;
1535 #endif
1536    case GL_FRAMEBUFFER_EXT:
1537       bindDrawBuf = GL_TRUE;
1538       bindReadBuf = GL_TRUE;
1539       break;
1540    default:
1541       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1542       return;
1543    }
1544
1545    if (framebuffer) {
1546       /* Binding a user-created framebuffer object */
1547       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1548       if (newDrawFb == &DummyFramebuffer) {
1549          /* ID was reserved, but no real framebuffer object made yet */
1550          newDrawFb = NULL;
1551       }
1552       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1553          /* All FBO IDs must be Gen'd */
1554          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1555          return;
1556       }
1557
1558       if (!newDrawFb) {
1559          /* create new framebuffer object */
1560          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1561          if (!newDrawFb) {
1562             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1563             return;
1564          }
1565          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1566       }
1567       newReadFb = newDrawFb;
1568    }
1569    else {
1570       /* Binding the window system framebuffer (which was originally set
1571        * with MakeCurrent).
1572        */
1573       newDrawFb = ctx->WinSysDrawBuffer;
1574       newReadFb = ctx->WinSysReadBuffer;
1575    }
1576
1577    ASSERT(newDrawFb);
1578    ASSERT(newDrawFb != &DummyFramebuffer);
1579
1580    /* save pointers to current/old framebuffers */
1581    oldDrawFb = ctx->DrawBuffer;
1582    oldReadFb = ctx->ReadBuffer;
1583
1584    /* check if really changing bindings */
1585    if (oldDrawFb == newDrawFb)
1586       bindDrawBuf = GL_FALSE;
1587    if (oldReadFb == newReadFb)
1588       bindReadBuf = GL_FALSE;
1589
1590    /*
1591     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1592     *
1593     * We also check if we're beginning and/or ending render-to-texture.
1594     * When a framebuffer with texture attachments is unbound, call
1595     * ctx->Driver.FinishRenderTexture().
1596     * When a framebuffer with texture attachments is bound, call
1597     * ctx->Driver.RenderTexture().
1598     *
1599     * Note that if the ReadBuffer has texture attachments we don't consider
1600     * that a render-to-texture case.
1601     */
1602    if (bindReadBuf) {
1603       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1604
1605       /* check if old readbuffer was render-to-texture */
1606       check_end_texture_render(ctx, oldReadFb);
1607
1608       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1609    }
1610
1611    if (bindDrawBuf) {
1612       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1613
1614       /* check if old read/draw buffers were render-to-texture */
1615       if (!bindReadBuf)
1616          check_end_texture_render(ctx, oldReadFb);
1617
1618       if (oldDrawFb != oldReadFb)
1619          check_end_texture_render(ctx, oldDrawFb);
1620
1621       /* check if newly bound framebuffer has any texture attachments */
1622       check_begin_texture_render(ctx, newDrawFb);
1623
1624       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1625    }
1626
1627    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1628       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1629    }
1630 }
1631
1632
1633 void GLAPIENTRY
1634 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1635 {
1636    GLint i;
1637    GET_CURRENT_CONTEXT(ctx);
1638
1639    ASSERT_OUTSIDE_BEGIN_END(ctx);
1640    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1641
1642    for (i = 0; i < n; i++) {
1643       if (framebuffers[i] > 0) {
1644          struct gl_framebuffer *fb;
1645          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1646          if (fb) {
1647             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1648
1649             /* check if deleting currently bound framebuffer object */
1650             if (ctx->Extensions.EXT_framebuffer_blit) {
1651                /* separate draw/read binding points */
1652                if (fb == ctx->DrawBuffer) {
1653                   /* bind default */
1654                   ASSERT(fb->RefCount >= 2);
1655                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1656                }
1657                if (fb == ctx->ReadBuffer) {
1658                   /* bind default */
1659                   ASSERT(fb->RefCount >= 2);
1660                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1661                }
1662             }
1663             else {
1664                /* only one binding point for read/draw buffers */
1665                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1666                   /* bind default */
1667                   ASSERT(fb->RefCount >= 2);
1668                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1669                }
1670             }
1671
1672             /* remove from hash table immediately, to free the ID */
1673             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1674
1675             if (fb != &DummyFramebuffer) {
1676                /* But the object will not be freed until it's no longer
1677                 * bound in any context.
1678                 */
1679                _mesa_reference_framebuffer(&fb, NULL);
1680             }
1681          }
1682       }
1683    }
1684 }
1685
1686
1687 void GLAPIENTRY
1688 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1689 {
1690    GET_CURRENT_CONTEXT(ctx);
1691    GLuint first;
1692    GLint i;
1693
1694    ASSERT_OUTSIDE_BEGIN_END(ctx);
1695
1696    if (n < 0) {
1697       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1698       return;
1699    }
1700
1701    if (!framebuffers)
1702       return;
1703
1704    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1705
1706    for (i = 0; i < n; i++) {
1707       GLuint name = first + i;
1708       framebuffers[i] = name;
1709       /* insert dummy placeholder into hash table */
1710       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1711       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1712       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1713    }
1714 }
1715
1716
1717
1718 GLenum GLAPIENTRY
1719 _mesa_CheckFramebufferStatusEXT(GLenum target)
1720 {
1721    struct gl_framebuffer *buffer;
1722    GET_CURRENT_CONTEXT(ctx);
1723
1724    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1725
1726    buffer = get_framebuffer_target(ctx, target);
1727    if (!buffer) {
1728       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1729       return 0;
1730    }
1731
1732    if (buffer->Name == 0) {
1733       /* The window system / default framebuffer is always complete */
1734       return GL_FRAMEBUFFER_COMPLETE_EXT;
1735    }
1736
1737    /* No need to flush here */
1738
1739    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1740       _mesa_test_framebuffer_completeness(ctx, buffer);
1741    }
1742
1743    return buffer->_Status;
1744 }
1745
1746
1747
1748 /**
1749  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1750  */
1751 static void
1752 framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
1753                     GLenum attachment, GLenum textarget, GLuint texture,
1754                     GLint level, GLint zoffset)
1755 {
1756    struct gl_renderbuffer_attachment *att;
1757    struct gl_texture_object *texObj = NULL;
1758    struct gl_framebuffer *fb;
1759
1760    ASSERT_OUTSIDE_BEGIN_END(ctx);
1761
1762    fb = get_framebuffer_target(ctx, target);
1763    if (!fb) {
1764       _mesa_error(ctx, GL_INVALID_ENUM,
1765                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1766       return;
1767    }
1768
1769    /* check framebuffer binding */
1770    if (fb->Name == 0) {
1771       _mesa_error(ctx, GL_INVALID_OPERATION,
1772                   "glFramebufferTexture%sEXT", caller);
1773       return;
1774    }
1775
1776
1777    /* The textarget, level, and zoffset parameters are only validated if
1778     * texture is non-zero.
1779     */
1780    if (texture) {
1781       GLboolean err = GL_TRUE;
1782
1783       texObj = _mesa_lookup_texture(ctx, texture);
1784       if (texObj != NULL) {
1785          if (textarget == 0) {
1786             /* XXX what's the purpose of this? */
1787             err = (texObj->Target != GL_TEXTURE_3D) &&
1788                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1789                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1790          }
1791          else {
1792             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1793                 ? !IS_CUBE_FACE(textarget)
1794                 : (texObj->Target != textarget);
1795          }
1796       }
1797       else {
1798          /* can't render to a non-existant texture */
1799          _mesa_error(ctx, GL_INVALID_OPERATION,
1800                      "glFramebufferTexture%sEXT(non existant texture)",
1801                      caller);
1802          return;
1803       }
1804
1805       if (err) {
1806          _mesa_error(ctx, GL_INVALID_OPERATION,
1807                      "glFramebufferTexture%sEXT(texture target mismatch)",
1808                      caller);
1809          return;
1810       }
1811
1812       if (texObj->Target == GL_TEXTURE_3D) {
1813          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1814          if (zoffset < 0 || zoffset >= maxSize) {
1815             _mesa_error(ctx, GL_INVALID_VALUE,
1816                         "glFramebufferTexture%sEXT(zoffset)", caller);
1817             return;
1818          }
1819       }
1820       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1821                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1822          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1823             _mesa_error(ctx, GL_INVALID_VALUE,
1824                         "glFramebufferTexture%sEXT(layer)", caller);
1825             return;
1826          }
1827       }
1828
1829       if ((level < 0) ||
1830           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1831          _mesa_error(ctx, GL_INVALID_VALUE,
1832                      "glFramebufferTexture%sEXT(level)", caller);
1833          return;
1834       }
1835    }
1836
1837    att = _mesa_get_attachment(ctx, fb, attachment);
1838    if (att == NULL) {
1839       _mesa_error(ctx, GL_INVALID_ENUM,
1840                   "glFramebufferTexture%sEXT(attachment)", caller);
1841       return;
1842    }
1843
1844    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1845
1846    _glthread_LOCK_MUTEX(fb->Mutex);
1847    if (texObj) {
1848       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1849                                    level, zoffset);
1850       /* Set the render-to-texture flag.  We'll check this flag in
1851        * glTexImage() and friends to determine if we need to revalidate
1852        * any FBOs that might be rendering into this texture.
1853        * This flag never gets cleared since it's non-trivial to determine
1854        * when all FBOs might be done rendering to this texture.  That's OK
1855        * though since it's uncommon to render to a texture then repeatedly
1856        * call glTexImage() to change images in the texture.
1857        */
1858       texObj->_RenderToTexture = GL_TRUE;
1859    }
1860    else {
1861       _mesa_remove_attachment(ctx, att);
1862    }
1863
1864    invalidate_framebuffer(fb);
1865
1866    _glthread_UNLOCK_MUTEX(fb->Mutex);
1867 }
1868
1869
1870
1871 void GLAPIENTRY
1872 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1873                               GLenum textarget, GLuint texture, GLint level)
1874 {
1875    GET_CURRENT_CONTEXT(ctx);
1876
1877    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1878       _mesa_error(ctx, GL_INVALID_ENUM,
1879                   "glFramebufferTexture1DEXT(textarget)");
1880       return;
1881    }
1882
1883    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1884                        level, 0);
1885 }
1886
1887
1888 void GLAPIENTRY
1889 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1890                               GLenum textarget, GLuint texture, GLint level)
1891 {
1892    GET_CURRENT_CONTEXT(ctx);
1893
1894    if ((texture != 0) &&
1895        (textarget != GL_TEXTURE_2D) &&
1896        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1897        (!IS_CUBE_FACE(textarget))) {
1898       _mesa_error(ctx, GL_INVALID_OPERATION,
1899                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1900       return;
1901    }
1902
1903    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1904                        level, 0);
1905 }
1906
1907
1908 void GLAPIENTRY
1909 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1910                               GLenum textarget, GLuint texture,
1911                               GLint level, GLint zoffset)
1912 {
1913    GET_CURRENT_CONTEXT(ctx);
1914
1915    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1916       _mesa_error(ctx, GL_INVALID_ENUM,
1917                   "glFramebufferTexture3DEXT(textarget)");
1918       return;
1919    }
1920
1921    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1922                        level, zoffset);
1923 }
1924
1925
1926 void GLAPIENTRY
1927 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1928                                  GLuint texture, GLint level, GLint layer)
1929 {
1930    GET_CURRENT_CONTEXT(ctx);
1931
1932    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1933                        level, layer);
1934 }
1935
1936
1937 void GLAPIENTRY
1938 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1939                                  GLenum renderbufferTarget,
1940                                  GLuint renderbuffer)
1941 {
1942    struct gl_renderbuffer_attachment *att;
1943    struct gl_framebuffer *fb;
1944    struct gl_renderbuffer *rb;
1945    GET_CURRENT_CONTEXT(ctx);
1946
1947    ASSERT_OUTSIDE_BEGIN_END(ctx);
1948
1949    fb = get_framebuffer_target(ctx, target);
1950    if (!fb) {
1951       _mesa_error(ctx, GL_INVALID_ENUM, "glFramebufferRenderbufferEXT(target)");
1952       return;
1953    }
1954
1955    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1956       _mesa_error(ctx, GL_INVALID_ENUM,
1957                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1958       return;
1959    }
1960
1961    if (fb->Name == 0) {
1962       /* Can't attach new renderbuffers to a window system framebuffer */
1963       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1964       return;
1965    }
1966
1967    att = _mesa_get_attachment(ctx, fb, attachment);
1968    if (att == NULL) {
1969       _mesa_error(ctx, GL_INVALID_ENUM,
1970                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1971                   _mesa_lookup_enum_by_nr(attachment));
1972       return;
1973    }
1974
1975    if (renderbuffer) {
1976       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1977       if (!rb) {
1978          _mesa_error(ctx, GL_INVALID_OPERATION,
1979                      "glFramebufferRenderbufferEXT(non-existant"
1980                      " renderbuffer %u)", renderbuffer);
1981          return;
1982       }
1983       else if (rb == &DummyRenderbuffer) {
1984          /* This is what NVIDIA does */
1985          _mesa_error(ctx, GL_INVALID_VALUE,
1986                      "glFramebufferRenderbufferEXT(renderbuffer %u)",
1987                      renderbuffer);
1988          return;
1989       }
1990    }
1991    else {
1992       /* remove renderbuffer attachment */
1993       rb = NULL;
1994    }
1995
1996    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
1997        rb && rb->Format != MESA_FORMAT_NONE) {
1998       /* make sure the renderbuffer is a depth/stencil format */
1999       const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
2000       if (baseFormat != GL_DEPTH_STENCIL) {
2001          _mesa_error(ctx, GL_INVALID_OPERATION,
2002                      "glFramebufferRenderbufferEXT(renderbuffer"
2003                      " is not DEPTH_STENCIL format)");
2004          return;
2005       }
2006    }
2007
2008
2009    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2010
2011    assert(ctx->Driver.FramebufferRenderbuffer);
2012    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
2013
2014    /* Some subsequent GL commands may depend on the framebuffer's visual
2015     * after the binding is updated.  Update visual info now.
2016     */
2017    _mesa_update_framebuffer_visual(ctx, fb);
2018 }
2019
2020
2021 void GLAPIENTRY
2022 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
2023                                              GLenum pname, GLint *params)
2024 {
2025    const struct gl_renderbuffer_attachment *att;
2026    struct gl_framebuffer *buffer;
2027    GET_CURRENT_CONTEXT(ctx);
2028
2029    ASSERT_OUTSIDE_BEGIN_END(ctx);
2030
2031    buffer = get_framebuffer_target(ctx, target);
2032    if (!buffer) {
2033       _mesa_error(ctx, GL_INVALID_ENUM,
2034                   "glGetFramebufferAttachmentParameterivEXT(target)");
2035       return;
2036    }
2037
2038    if (buffer->Name == 0) {
2039       /* the default / window-system FBO */
2040       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
2041    }
2042    else {
2043       /* user-created framebuffer FBO */
2044       att = _mesa_get_attachment(ctx, buffer, attachment);
2045    }
2046
2047    if (att == NULL) {
2048       _mesa_error(ctx, GL_INVALID_ENUM,
2049                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
2050       return;
2051    }
2052
2053    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
2054       /* the depth and stencil attachments must point to the same buffer */
2055       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
2056       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
2057       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
2058       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
2059          _mesa_error(ctx, GL_INVALID_OPERATION,
2060                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
2061                      " attachments differ)");
2062          return;
2063       }
2064    }
2065
2066    /* No need to flush here */
2067
2068    switch (pname) {
2069    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
2070       *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : att->Type;
2071       return;
2072    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
2073       if (att->Type == GL_RENDERBUFFER_EXT) {
2074          *params = att->Renderbuffer->Name;
2075       }
2076       else if (att->Type == GL_TEXTURE) {
2077          *params = att->Texture->Name;
2078       }
2079       else {
2080          assert(att->Type == GL_NONE);
2081          *params = 0;
2082       }
2083       return;
2084    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
2085       if (att->Type == GL_TEXTURE) {
2086          *params = att->TextureLevel;
2087       }
2088       else {
2089          _mesa_error(ctx, GL_INVALID_ENUM,
2090                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2091       }
2092       return;
2093    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
2094       if (att->Type == GL_TEXTURE) {
2095          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
2096             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
2097          }
2098          else {
2099             *params = 0;
2100          }
2101       }
2102       else {
2103          _mesa_error(ctx, GL_INVALID_ENUM,
2104                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2105       }
2106       return;
2107    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
2108       if (att->Type == GL_TEXTURE) {
2109          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
2110             *params = att->Zoffset;
2111          }
2112          else {
2113             *params = 0;
2114          }
2115       }
2116       else {
2117          _mesa_error(ctx, GL_INVALID_ENUM,
2118                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2119       }
2120       return;
2121    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
2122       if (!ctx->Extensions.ARB_framebuffer_object) {
2123          _mesa_error(ctx, GL_INVALID_ENUM,
2124                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2125       }
2126       else {
2127          if (ctx->Extensions.EXT_framebuffer_sRGB && ctx->Const.sRGBCapable) {
2128             *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
2129          }
2130          else {
2131             /* According to ARB_framebuffer_sRGB, we should return LINEAR
2132              * if the sRGB conversion is unsupported. */
2133             *params = GL_LINEAR;
2134          }
2135       }
2136       return;
2137    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
2138       if (!ctx->Extensions.ARB_framebuffer_object) {
2139          _mesa_error(ctx, GL_INVALID_ENUM,
2140                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2141          return;
2142       }
2143       else {
2144          gl_format format = att->Renderbuffer->Format;
2145          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
2146             /* special cases */
2147             *params = GL_INDEX;
2148          }
2149          else {
2150             *params = _mesa_get_format_datatype(format);
2151          }
2152       }
2153       return;
2154    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
2155    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
2156    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
2157    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
2158    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
2159    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
2160       if (!ctx->Extensions.ARB_framebuffer_object) {
2161          _mesa_error(ctx, GL_INVALID_ENUM,
2162                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2163       }
2164       else if (att->Texture) {
2165          const struct gl_texture_image *texImage =
2166             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
2167                                    att->TextureLevel);
2168          if (texImage) {
2169             *params = get_component_bits(pname, texImage->_BaseFormat,
2170                                          texImage->TexFormat);
2171          }
2172          else {
2173             *params = 0;
2174          }
2175       }
2176       else if (att->Renderbuffer) {
2177          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
2178                                       att->Renderbuffer->Format);
2179       }
2180       else {
2181          *params = 0;
2182       }
2183       return;
2184    default:
2185       _mesa_error(ctx, GL_INVALID_ENUM,
2186                   "glGetFramebufferAttachmentParameterivEXT(pname)");
2187       return;
2188    }
2189 }
2190
2191
2192 void GLAPIENTRY
2193 _mesa_GenerateMipmapEXT(GLenum target)
2194 {
2195    struct gl_texture_object *texObj;
2196    GET_CURRENT_CONTEXT(ctx);
2197
2198    ASSERT_OUTSIDE_BEGIN_END(ctx);
2199    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2200
2201    switch (target) {
2202    case GL_TEXTURE_1D:
2203    case GL_TEXTURE_2D:
2204    case GL_TEXTURE_3D:
2205    case GL_TEXTURE_CUBE_MAP:
2206       /* OK, legal value */
2207       break;
2208    default:
2209       /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */
2210       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
2211       return;
2212    }
2213
2214    texObj = _mesa_get_current_tex_object(ctx, target);
2215
2216    if (texObj->BaseLevel >= texObj->MaxLevel) {
2217       /* nothing to do */
2218       return;
2219    }
2220
2221    if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
2222        !_mesa_cube_complete(texObj)) {
2223       _mesa_error(ctx, GL_INVALID_OPERATION,
2224                   "glGenerateMipmap(incomplete cube map)");
2225       return;
2226    }
2227
2228    _mesa_lock_texture(ctx, texObj);
2229    if (target == GL_TEXTURE_CUBE_MAP) {
2230       GLuint face;
2231       for (face = 0; face < 6; face++)
2232          ctx->Driver.GenerateMipmap(ctx,
2233                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
2234                                     texObj);
2235    }
2236    else {
2237       ctx->Driver.GenerateMipmap(ctx, target, texObj);
2238    }
2239    _mesa_unlock_texture(ctx, texObj);
2240 }
2241
2242
2243 #if FEATURE_EXT_framebuffer_blit
2244
2245 static const struct gl_renderbuffer_attachment *
2246 find_attachment(const struct gl_framebuffer *fb,
2247                 const struct gl_renderbuffer *rb)
2248 {
2249    GLuint i;
2250    for (i = 0; i < Elements(fb->Attachment); i++) {
2251       if (fb->Attachment[i].Renderbuffer == rb)
2252          return &fb->Attachment[i];
2253    }
2254    return NULL;
2255 }
2256
2257
2258
2259 /**
2260  * Blit rectangular region, optionally from one framebuffer to another.
2261  *
2262  * Note, if the src buffer is multisampled and the dest is not, this is
2263  * when the samples must be resolved to a single color.
2264  */
2265 void GLAPIENTRY
2266 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2267                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2268                          GLbitfield mask, GLenum filter)
2269 {
2270    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2271                                      GL_DEPTH_BUFFER_BIT |
2272                                      GL_STENCIL_BUFFER_BIT);
2273    const struct gl_framebuffer *readFb, *drawFb;
2274    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2275    GET_CURRENT_CONTEXT(ctx);
2276
2277    ASSERT_OUTSIDE_BEGIN_END(ctx);
2278    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2279
2280    if (MESA_VERBOSE & VERBOSE_API)
2281       _mesa_debug(ctx,
2282                   "glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d, 0x%x, %s)\n",
2283                   srcX0, srcY0, srcX1, srcY1,
2284                   dstX0, dstY0, dstX1, dstY1,
2285                   mask, _mesa_lookup_enum_by_nr(filter));
2286
2287    if (ctx->NewState) {
2288       _mesa_update_state(ctx);
2289    }
2290
2291    readFb = ctx->ReadBuffer;
2292    drawFb = ctx->DrawBuffer;
2293
2294    if (!readFb || !drawFb) {
2295       /* This will normally never happen but someday we may want to
2296        * support MakeCurrent() with no drawables.
2297        */
2298       return;
2299    }
2300
2301    /* check for complete framebuffers */
2302    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2303        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2304       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2305                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2306       return;
2307    }
2308
2309    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2310       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2311       return;
2312    }
2313
2314    if (mask & ~legalMaskBits) {
2315       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2316       return;
2317    }
2318
2319    /* depth/stencil must be blitted with nearest filtering */
2320    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2321         && filter != GL_NEAREST) {
2322       _mesa_error(ctx, GL_INVALID_OPERATION,
2323              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2324       return;
2325    }
2326
2327    /* get color read/draw renderbuffers */
2328    if (mask & GL_COLOR_BUFFER_BIT) {
2329       colorReadRb = readFb->_ColorReadBuffer;
2330       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2331    }
2332    else {
2333       colorReadRb = colorDrawRb = NULL;
2334    }
2335
2336    if (mask & GL_STENCIL_BUFFER_BIT) {
2337       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2338       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2339       if (!readRb ||
2340           !drawRb ||
2341           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2342           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2343          _mesa_error(ctx, GL_INVALID_OPERATION,
2344                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2345          return;
2346       }
2347    }
2348
2349    if (mask & GL_DEPTH_BUFFER_BIT) {
2350       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2351       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2352       if (!readRb ||
2353           !drawRb ||
2354           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2355           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2356          _mesa_error(ctx, GL_INVALID_OPERATION,
2357                      "glBlitFramebufferEXT(depth buffer size mismatch");
2358          return;
2359       }
2360    }
2361
2362    if (readFb->Visual.samples > 0 &&
2363        drawFb->Visual.samples > 0 &&
2364        readFb->Visual.samples != drawFb->Visual.samples) {
2365       _mesa_error(ctx, GL_INVALID_OPERATION,
2366                   "glBlitFramebufferEXT(mismatched samples");
2367       return;
2368    }
2369
2370    /* extra checks for multisample copies... */
2371    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2372       /* src and dest region sizes must be the same */
2373       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2374           srcY1 - srcY0 != dstY1 - dstY0) {
2375          _mesa_error(ctx, GL_INVALID_OPERATION,
2376                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2377          return;
2378       }
2379
2380       /* color formats must match */
2381       if (colorReadRb &&
2382           colorDrawRb &&
2383           colorReadRb->Format != colorDrawRb->Format) {
2384          _mesa_error(ctx, GL_INVALID_OPERATION,
2385                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2386          return;
2387       }
2388    }
2389
2390    if (!ctx->Extensions.EXT_framebuffer_blit) {
2391       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2392       return;
2393    }
2394
2395    /* Debug code */
2396    if (DEBUG_BLIT) {
2397       printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2398              " 0x%x, 0x%x)\n",
2399              srcX0, srcY0, srcX1, srcY1,
2400              dstX0, dstY0, dstX1, dstY1,
2401              mask, filter);
2402       if (colorReadRb) {
2403          const struct gl_renderbuffer_attachment *att;
2404
2405          att = find_attachment(readFb, colorReadRb);
2406          printf("  Src FBO %u  RB %u (%dx%d)  ",
2407                 readFb->Name, colorReadRb->Name,
2408                 colorReadRb->Width, colorReadRb->Height);
2409          if (att && att->Texture) {
2410             printf("Tex %u  tgt 0x%x  level %u  face %u",
2411                    att->Texture->Name,
2412                    att->Texture->Target,
2413                    att->TextureLevel,
2414                    att->CubeMapFace);
2415          }
2416          printf("\n");
2417
2418          att = find_attachment(drawFb, colorDrawRb);
2419          printf("  Dst FBO %u  RB %u (%dx%d)  ",
2420                 drawFb->Name, colorDrawRb->Name,
2421                 colorDrawRb->Width, colorDrawRb->Height);
2422          if (att && att->Texture) {
2423             printf("Tex %u  tgt 0x%x  level %u  face %u",
2424                    att->Texture->Name,
2425                    att->Texture->Target,
2426                    att->TextureLevel,
2427                    att->CubeMapFace);
2428          }
2429          printf("\n");
2430       }
2431    }
2432
2433    ASSERT(ctx->Driver.BlitFramebuffer);
2434    ctx->Driver.BlitFramebuffer(ctx,
2435                                srcX0, srcY0, srcX1, srcY1,
2436                                dstX0, dstY0, dstX1, dstY1,
2437                                mask, filter);
2438 }
2439 #endif /* FEATURE_EXT_framebuffer_blit */
2440
2441 #if FEATURE_ARB_geometry_shader4
2442 void GLAPIENTRY
2443 _mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
2444                             GLuint texture, GLint level)
2445 {
2446    GET_CURRENT_CONTEXT(ctx);
2447    _mesa_error(ctx, GL_INVALID_OPERATION,
2448                "glFramebufferTextureARB "
2449                "not implemented!");
2450 }
2451
2452 void GLAPIENTRY
2453 _mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
2454                                 GLuint texture, GLint level, GLenum face)
2455 {
2456    GET_CURRENT_CONTEXT(ctx);
2457    _mesa_error(ctx, GL_INVALID_OPERATION,
2458                "glFramebufferTextureFaceARB "
2459                "not implemented!");
2460 }
2461 #endif /* FEATURE_ARB_geometry_shader4 */