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