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