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    for (i = 0; i < BUFFER_COUNT; i++) {
1163       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1164       struct gl_texture_object *texObj = att->Texture;
1165       if (texObj
1166           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1167          ctx->Driver.RenderTexture(ctx, fb, att);
1168       }
1169    }
1170 }
1171
1172
1173 /**
1174  * Examine all the framebuffer's attachments to see if any are textures.
1175  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1176  * notify the device driver that the texture image may have changed.
1177  */
1178 static void
1179 check_end_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1180 {
1181    if (ctx->Driver.FinishRenderTexture) {
1182       GLuint i;
1183       for (i = 0; i < BUFFER_COUNT; i++) {
1184          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1185          if (att->Texture && att->Renderbuffer) {
1186             ctx->Driver.FinishRenderTexture(ctx, att);
1187          }
1188       }
1189    }
1190 }
1191
1192
1193 void GLAPIENTRY
1194 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1195 {
1196    struct gl_framebuffer *newFb, *newFbread;
1197    GLboolean bindReadBuf, bindDrawBuf;
1198    GET_CURRENT_CONTEXT(ctx);
1199
1200 #ifdef DEBUG
1201    if (ctx->Extensions.ARB_framebuffer_object) {
1202       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1203       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1204    }
1205 #endif
1206
1207    ASSERT_OUTSIDE_BEGIN_END(ctx);
1208
1209    if (!ctx->Extensions.EXT_framebuffer_object) {
1210       _mesa_error(ctx, GL_INVALID_OPERATION,
1211                   "glBindFramebufferEXT(unsupported)");
1212       return;
1213    }
1214
1215    switch (target) {
1216 #if FEATURE_EXT_framebuffer_blit
1217    case GL_DRAW_FRAMEBUFFER_EXT:
1218       if (!ctx->Extensions.EXT_framebuffer_blit) {
1219          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1220          return;
1221       }
1222       bindDrawBuf = GL_TRUE;
1223       bindReadBuf = GL_FALSE;
1224       break;
1225    case GL_READ_FRAMEBUFFER_EXT:
1226       if (!ctx->Extensions.EXT_framebuffer_blit) {
1227          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1228          return;
1229       }
1230       bindDrawBuf = GL_FALSE;
1231       bindReadBuf = GL_TRUE;
1232       break;
1233 #endif
1234    case GL_FRAMEBUFFER_EXT:
1235       bindDrawBuf = GL_TRUE;
1236       bindReadBuf = GL_TRUE;
1237       break;
1238    default:
1239       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1240       return;
1241    }
1242
1243    if (framebuffer) {
1244       /* Binding a user-created framebuffer object */
1245       newFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1246       if (newFb == &DummyFramebuffer) {
1247          /* ID was reserved, but no real framebuffer object made yet */
1248          newFb = NULL;
1249       }
1250       else if (!newFb && ctx->Extensions.ARB_framebuffer_object) {
1251          /* All FBO IDs must be Gen'd */
1252          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1253          return;
1254       }
1255
1256       if (!newFb) {
1257          /* create new framebuffer object */
1258          newFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1259          if (!newFb) {
1260             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1261             return;
1262          }
1263          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
1264       }
1265       newFbread = newFb;
1266    }
1267    else {
1268       /* Binding the window system framebuffer (which was originally set
1269        * with MakeCurrent).
1270        */
1271       newFb = ctx->WinSysDrawBuffer;
1272       newFbread = ctx->WinSysReadBuffer;
1273    }
1274
1275    ASSERT(newFb);
1276    ASSERT(newFb != &DummyFramebuffer);
1277
1278    /*
1279     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1280     */
1281    if (bindReadBuf) {
1282       if (ctx->ReadBuffer == newFbread) {
1283          bindReadBuf = GL_FALSE; /* no change */
1284       }
1285       else {
1286          FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1287          _mesa_reference_framebuffer(&ctx->ReadBuffer, newFbread);
1288       }
1289    }
1290
1291    if (bindDrawBuf) {
1292       /* check if old FB had any texture attachments */
1293       if (ctx->DrawBuffer->Name != 0) {
1294          check_end_texture_render(ctx, ctx->DrawBuffer);
1295       }
1296
1297       if (ctx->DrawBuffer == newFb) {
1298          bindDrawBuf = GL_FALSE; /* no change */
1299       }
1300       else {
1301          FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1302          _mesa_reference_framebuffer(&ctx->DrawBuffer, newFb);
1303       }
1304
1305       if (newFb->Name != 0) {
1306          /* check if newly bound framebuffer has any texture attachments */
1307          check_begin_texture_render(ctx, newFb);
1308       }
1309    }
1310
1311    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1312       ctx->Driver.BindFramebuffer(ctx, target, newFb, newFbread);
1313    }
1314 }
1315
1316
1317 void GLAPIENTRY
1318 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1319 {
1320    GLint i;
1321    GET_CURRENT_CONTEXT(ctx);
1322
1323    ASSERT_OUTSIDE_BEGIN_END(ctx);
1324    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1325
1326    for (i = 0; i < n; i++) {
1327       if (framebuffers[i] > 0) {
1328          struct gl_framebuffer *fb;
1329          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1330          if (fb) {
1331             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1332
1333             /* check if deleting currently bound framebuffer object */
1334             if (fb == ctx->DrawBuffer) {
1335                /* bind default */
1336                ASSERT(fb->RefCount >= 2);
1337                _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1338             }
1339             if (fb == ctx->ReadBuffer) {
1340                /* bind default */
1341                ASSERT(fb->RefCount >= 2);
1342                _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1343             }
1344
1345             /* remove from hash table immediately, to free the ID */
1346             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1347
1348             if (fb != &DummyFramebuffer) {
1349                /* But the object will not be freed until it's no longer
1350                 * bound in any context.
1351                 */
1352                _mesa_reference_framebuffer(&fb, NULL);
1353             }
1354          }
1355       }
1356    }
1357 }
1358
1359
1360 void GLAPIENTRY
1361 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1362 {
1363    GET_CURRENT_CONTEXT(ctx);
1364    GLuint first;
1365    GLint i;
1366
1367    ASSERT_OUTSIDE_BEGIN_END(ctx);
1368
1369    if (n < 0) {
1370       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1371       return;
1372    }
1373
1374    if (!framebuffers)
1375       return;
1376
1377    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1378
1379    for (i = 0; i < n; i++) {
1380       GLuint name = first + i;
1381       framebuffers[i] = name;
1382       /* insert dummy placeholder into hash table */
1383       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1384       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1385       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1386    }
1387 }
1388
1389
1390
1391 GLenum GLAPIENTRY
1392 _mesa_CheckFramebufferStatusEXT(GLenum target)
1393 {
1394    struct gl_framebuffer *buffer;
1395    GET_CURRENT_CONTEXT(ctx);
1396
1397    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1398
1399    switch (target) {
1400 #if FEATURE_EXT_framebuffer_blit
1401    case GL_DRAW_FRAMEBUFFER_EXT:
1402       if (!ctx->Extensions.EXT_framebuffer_blit) {
1403          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1404          return 0;
1405       }
1406       buffer = ctx->DrawBuffer;
1407       break;
1408    case GL_READ_FRAMEBUFFER_EXT:
1409       if (!ctx->Extensions.EXT_framebuffer_blit) {
1410          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1411          return 0;
1412       }
1413       buffer = ctx->ReadBuffer;
1414       break;
1415 #endif
1416    case GL_FRAMEBUFFER_EXT:
1417       buffer = ctx->DrawBuffer;
1418       break;
1419    default:
1420       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1421       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1422    }
1423
1424    if (buffer->Name == 0) {
1425       /* The window system / default framebuffer is always complete */
1426       return GL_FRAMEBUFFER_COMPLETE_EXT;
1427    }
1428
1429    /* No need to flush here */
1430
1431    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1432       _mesa_test_framebuffer_completeness(ctx, buffer);
1433    }
1434
1435    return buffer->_Status;
1436 }
1437
1438
1439
1440 /**
1441  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1442  */
1443 static void
1444 framebuffer_texture(GLcontext *ctx, const char *caller, GLenum target,
1445                     GLenum attachment, GLenum textarget, GLuint texture,
1446                     GLint level, GLint zoffset)
1447 {
1448    struct gl_renderbuffer_attachment *att;
1449    struct gl_texture_object *texObj = NULL;
1450    struct gl_framebuffer *fb;
1451    GLboolean error = GL_FALSE;
1452
1453    ASSERT_OUTSIDE_BEGIN_END(ctx);
1454
1455    switch (target) {
1456    case GL_READ_FRAMEBUFFER_EXT:
1457       error = !ctx->Extensions.EXT_framebuffer_blit;
1458       fb = ctx->ReadBuffer;
1459       break;
1460    case GL_DRAW_FRAMEBUFFER_EXT:
1461       error = !ctx->Extensions.EXT_framebuffer_blit;
1462       /* fall-through */
1463    case GL_FRAMEBUFFER_EXT:
1464       fb = ctx->DrawBuffer;
1465       break;
1466    default:
1467       error = GL_TRUE;
1468    }
1469
1470    if (error) {
1471       _mesa_error(ctx, GL_INVALID_ENUM,
1472                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1473       return;
1474    }
1475
1476    ASSERT(fb);
1477
1478    /* check framebuffer binding */
1479    if (fb->Name == 0) {
1480       _mesa_error(ctx, GL_INVALID_OPERATION,
1481                   "glFramebufferTexture%sEXT", caller);
1482       return;
1483    }
1484
1485
1486    /* The textarget, level, and zoffset parameters are only validated if
1487     * texture is non-zero.
1488     */
1489    if (texture) {
1490       GLboolean err = GL_TRUE;
1491
1492       texObj = _mesa_lookup_texture(ctx, texture);
1493       if (texObj != NULL) {
1494          if (textarget == 0) {
1495             err = (texObj->Target != GL_TEXTURE_3D) &&
1496                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1497                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1498          }
1499          else {
1500             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1501                 ? !IS_CUBE_FACE(textarget)
1502                 : (texObj->Target != textarget);
1503          }
1504       }
1505
1506       if (err) {
1507          _mesa_error(ctx, GL_INVALID_OPERATION,
1508                      "glFramebufferTexture%sEXT(texture target mismatch)",
1509                      caller);
1510          return;
1511       }
1512
1513       if (texObj->Target == GL_TEXTURE_3D) {
1514          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1515          if (zoffset < 0 || zoffset >= maxSize) {
1516             _mesa_error(ctx, GL_INVALID_VALUE,
1517                         "glFramebufferTexture%sEXT(zoffset)", caller);
1518             return;
1519          }
1520       }
1521       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1522                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1523          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1524             _mesa_error(ctx, GL_INVALID_VALUE,
1525                         "glFramebufferTexture%sEXT(layer)", caller);
1526             return;
1527          }
1528       }
1529
1530       if ((level < 0) ||
1531           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1532          _mesa_error(ctx, GL_INVALID_VALUE,
1533                      "glFramebufferTexture%sEXT(level)", caller);
1534          return;
1535       }
1536    }
1537
1538    att = _mesa_get_attachment(ctx, fb, attachment);
1539    if (att == NULL) {
1540       _mesa_error(ctx, GL_INVALID_ENUM,
1541                   "glFramebufferTexture%sEXT(attachment)", caller);
1542       return;
1543    }
1544
1545    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1546
1547    _glthread_LOCK_MUTEX(fb->Mutex);
1548    if (texObj) {
1549       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1550                                    level, zoffset);
1551       /* Set the render-to-texture flag.  We'll check this flag in
1552        * glTexImage() and friends to determine if we need to revalidate
1553        * any FBOs that might be rendering into this texture.
1554        * This flag never gets cleared since it's non-trivial to determine
1555        * when all FBOs might be done rendering to this texture.  That's OK
1556        * though since it's uncommon to render to a texture then repeatedly
1557        * call glTexImage() to change images in the texture.
1558        */
1559       texObj->_RenderToTexture = GL_TRUE;
1560    }
1561    else {
1562       _mesa_remove_attachment(ctx, att);
1563    }
1564
1565    invalidate_framebuffer(fb);
1566
1567    _glthread_UNLOCK_MUTEX(fb->Mutex);
1568 }
1569
1570
1571
1572 void GLAPIENTRY
1573 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1574                               GLenum textarget, GLuint texture, GLint level)
1575 {
1576    GET_CURRENT_CONTEXT(ctx);
1577
1578    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1579       _mesa_error(ctx, GL_INVALID_ENUM,
1580                   "glFramebufferTexture1DEXT(textarget)");
1581       return;
1582    }
1583
1584    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1585                        level, 0);
1586 }
1587
1588
1589 void GLAPIENTRY
1590 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1591                               GLenum textarget, GLuint texture, GLint level)
1592 {
1593    GET_CURRENT_CONTEXT(ctx);
1594
1595    if ((texture != 0) &&
1596        (textarget != GL_TEXTURE_2D) &&
1597        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1598        (!IS_CUBE_FACE(textarget))) {
1599       _mesa_error(ctx, GL_INVALID_OPERATION,
1600                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1601       return;
1602    }
1603
1604    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1605                        level, 0);
1606 }
1607
1608
1609 void GLAPIENTRY
1610 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1611                               GLenum textarget, GLuint texture,
1612                               GLint level, GLint zoffset)
1613 {
1614    GET_CURRENT_CONTEXT(ctx);
1615
1616    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1617       _mesa_error(ctx, GL_INVALID_ENUM,
1618                   "glFramebufferTexture3DEXT(textarget)");
1619       return;
1620    }
1621
1622    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1623                        level, zoffset);
1624 }
1625
1626
1627 void GLAPIENTRY
1628 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1629                                  GLuint texture, GLint level, GLint layer)
1630 {
1631    GET_CURRENT_CONTEXT(ctx);
1632
1633    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1634                        level, layer);
1635 }
1636
1637
1638 void GLAPIENTRY
1639 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1640                                  GLenum renderbufferTarget,
1641                                  GLuint renderbuffer)
1642 {
1643    struct gl_renderbuffer_attachment *att;
1644    struct gl_framebuffer *fb;
1645    struct gl_renderbuffer *rb;
1646    GET_CURRENT_CONTEXT(ctx);
1647
1648    ASSERT_OUTSIDE_BEGIN_END(ctx);
1649
1650    switch (target) {
1651 #if FEATURE_EXT_framebuffer_blit
1652    case GL_DRAW_FRAMEBUFFER_EXT:
1653       if (!ctx->Extensions.EXT_framebuffer_blit) {
1654          _mesa_error(ctx, GL_INVALID_ENUM,
1655                      "glFramebufferRenderbufferEXT(target)");
1656          return;
1657       }
1658       fb = ctx->DrawBuffer;
1659       break;
1660    case GL_READ_FRAMEBUFFER_EXT:
1661       if (!ctx->Extensions.EXT_framebuffer_blit) {
1662          _mesa_error(ctx, GL_INVALID_ENUM,
1663                      "glFramebufferRenderbufferEXT(target)");
1664          return;
1665       }
1666       fb = ctx->ReadBuffer;
1667       break;
1668 #endif
1669    case GL_FRAMEBUFFER_EXT:
1670       fb = ctx->DrawBuffer;
1671       break;
1672    default:
1673       _mesa_error(ctx, GL_INVALID_ENUM,
1674                   "glFramebufferRenderbufferEXT(target)");
1675       return;
1676    }
1677
1678    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1679       _mesa_error(ctx, GL_INVALID_ENUM,
1680                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1681       return;
1682    }
1683
1684    if (fb->Name == 0) {
1685       /* Can't attach new renderbuffers to a window system framebuffer */
1686       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1687       return;
1688    }
1689
1690    att = _mesa_get_attachment(ctx, fb, attachment);
1691    if (att == NULL) {
1692       _mesa_error(ctx, GL_INVALID_ENUM,
1693                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1694                   _mesa_lookup_enum_by_nr(attachment));
1695       return;
1696    }
1697
1698    if (renderbuffer) {
1699       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1700       if (!rb) {
1701          _mesa_error(ctx, GL_INVALID_OPERATION,
1702                      "glFramebufferRenderbufferEXT(non-existant"
1703                      " renderbuffer %u)", renderbuffer);
1704          return;
1705       }
1706    }
1707    else {
1708       /* remove renderbuffer attachment */
1709       rb = NULL;
1710    }
1711
1712    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1713       /* make sure the renderbuffer is a depth/stencil format */
1714       const GLenum baseFormat =
1715          _mesa_get_format_base_format(att->Renderbuffer->Format);
1716       if (baseFormat != GL_DEPTH_STENCIL) {
1717          _mesa_error(ctx, GL_INVALID_OPERATION,
1718                      "glFramebufferRenderbufferEXT(renderbuffer"
1719                      " is not DEPTH_STENCIL format)");
1720          return;
1721       }
1722    }
1723
1724
1725    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1726
1727    assert(ctx->Driver.FramebufferRenderbuffer);
1728    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1729
1730    /* Some subsequent GL commands may depend on the framebuffer's visual
1731     * after the binding is updated.  Update visual info now.
1732     */
1733    _mesa_update_framebuffer_visual(fb);
1734 }
1735
1736
1737 void GLAPIENTRY
1738 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1739                                              GLenum pname, GLint *params)
1740 {
1741    const struct gl_renderbuffer_attachment *att;
1742    struct gl_framebuffer *buffer;
1743    GET_CURRENT_CONTEXT(ctx);
1744
1745    ASSERT_OUTSIDE_BEGIN_END(ctx);
1746
1747    switch (target) {
1748 #if FEATURE_EXT_framebuffer_blit
1749    case GL_DRAW_FRAMEBUFFER_EXT:
1750       if (!ctx->Extensions.EXT_framebuffer_blit) {
1751          _mesa_error(ctx, GL_INVALID_ENUM,
1752                      "glGetFramebufferAttachmentParameterivEXT(target)");
1753          return;
1754       }
1755       buffer = ctx->DrawBuffer;
1756       break;
1757    case GL_READ_FRAMEBUFFER_EXT:
1758       if (!ctx->Extensions.EXT_framebuffer_blit) {
1759          _mesa_error(ctx, GL_INVALID_ENUM,
1760                      "glGetFramebufferAttachmentParameterivEXT(target)");
1761          return;
1762       }
1763       buffer = ctx->ReadBuffer;
1764       break;
1765 #endif
1766    case GL_FRAMEBUFFER_EXT:
1767       buffer = ctx->DrawBuffer;
1768       break;
1769    default:
1770       _mesa_error(ctx, GL_INVALID_ENUM,
1771                   "glGetFramebufferAttachmentParameterivEXT(target)");
1772       return;
1773    }
1774
1775    if (buffer->Name == 0) {
1776       _mesa_error(ctx, GL_INVALID_OPERATION,
1777                   "glGetFramebufferAttachmentParameterivEXT");
1778       return;
1779    }
1780
1781    att = _mesa_get_attachment(ctx, buffer, attachment);
1782    if (att == NULL) {
1783       _mesa_error(ctx, GL_INVALID_ENUM,
1784                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1785       return;
1786    }
1787
1788    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1789       /* the depth and stencil attachments must point to the same buffer */
1790       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
1791       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
1792       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
1793       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
1794          _mesa_error(ctx, GL_INVALID_OPERATION,
1795                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
1796                      " attachments differ)");
1797          return;
1798       }
1799    }
1800
1801    /* No need to flush here */
1802
1803    switch (pname) {
1804    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
1805       *params = att->Type;
1806       return;
1807    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
1808       if (att->Type == GL_RENDERBUFFER_EXT) {
1809          *params = att->Renderbuffer->Name;
1810       }
1811       else if (att->Type == GL_TEXTURE) {
1812          *params = att->Texture->Name;
1813       }
1814       else {
1815          _mesa_error(ctx, GL_INVALID_ENUM,
1816                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1817       }
1818       return;
1819    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
1820       if (att->Type == GL_TEXTURE) {
1821          *params = att->TextureLevel;
1822       }
1823       else {
1824          _mesa_error(ctx, GL_INVALID_ENUM,
1825                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1826       }
1827       return;
1828    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
1829       if (att->Type == GL_TEXTURE) {
1830          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
1831             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
1832          }
1833          else {
1834             *params = 0;
1835          }
1836       }
1837       else {
1838          _mesa_error(ctx, GL_INVALID_ENUM,
1839                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1840       }
1841       return;
1842    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
1843       if (att->Type == GL_TEXTURE) {
1844          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
1845             *params = att->Zoffset;
1846          }
1847          else {
1848             *params = 0;
1849          }
1850       }
1851       else {
1852          _mesa_error(ctx, GL_INVALID_ENUM,
1853                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1854       }
1855       return;
1856    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
1857       if (!ctx->Extensions.ARB_framebuffer_object) {
1858          _mesa_error(ctx, GL_INVALID_ENUM,
1859                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1860       }
1861       else {
1862          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
1863       }
1864       return;
1865    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
1866       if (!ctx->Extensions.ARB_framebuffer_object) {
1867          _mesa_error(ctx, GL_INVALID_ENUM,
1868                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1869          return;
1870       }
1871       else {
1872          gl_format format = att->Renderbuffer->Format;
1873          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
1874             /* special cases */
1875             *params = GL_INDEX;
1876          }
1877          else {
1878             *params = _mesa_get_format_datatype(format);
1879          }
1880       }
1881       return;
1882    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1883    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1884    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1885    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1886    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1887    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1888       if (!ctx->Extensions.ARB_framebuffer_object) {
1889          _mesa_error(ctx, GL_INVALID_ENUM,
1890                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1891       }
1892       else if (att->Texture) {
1893          const struct gl_texture_image *texImage =
1894             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
1895                                    att->TextureLevel);
1896          if (texImage) {
1897             *params = get_component_bits(pname, texImage->_BaseFormat,
1898                                          texImage->TexFormat);
1899          }
1900          else {
1901             *params = 0;
1902          }
1903       }
1904       else if (att->Renderbuffer) {
1905          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
1906                                       att->Renderbuffer->Format);
1907       }
1908       else {
1909          *params = 0;
1910       }
1911       return;
1912    default:
1913       _mesa_error(ctx, GL_INVALID_ENUM,
1914                   "glGetFramebufferAttachmentParameterivEXT(pname)");
1915       return;
1916    }
1917 }
1918
1919
1920 void GLAPIENTRY
1921 _mesa_GenerateMipmapEXT(GLenum target)
1922 {
1923    struct gl_texture_unit *texUnit;
1924    struct gl_texture_object *texObj;
1925    GET_CURRENT_CONTEXT(ctx);
1926
1927    ASSERT_OUTSIDE_BEGIN_END(ctx);
1928    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1929
1930    switch (target) {
1931    case GL_TEXTURE_1D:
1932    case GL_TEXTURE_2D:
1933    case GL_TEXTURE_3D:
1934    case GL_TEXTURE_CUBE_MAP:
1935       /* OK, legal value */
1936       break;
1937    default:
1938       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
1939       return;
1940    }
1941
1942    texUnit = _mesa_get_current_tex_unit(ctx);
1943    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1944
1945    _mesa_lock_texture(ctx, texObj);
1946    if (target == GL_TEXTURE_CUBE_MAP) {
1947       GLuint face;
1948       for (face = 0; face < 6; face++)
1949          ctx->Driver.GenerateMipmap(ctx,
1950                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
1951                                     texObj);
1952    }
1953    else {
1954       ctx->Driver.GenerateMipmap(ctx, target, texObj);
1955    }
1956    _mesa_unlock_texture(ctx, texObj);
1957 }
1958
1959
1960 #if FEATURE_EXT_framebuffer_blit
1961
1962 static const struct gl_renderbuffer_attachment *
1963 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
1964 {
1965    GLuint i;
1966    for (i = 0; i < Elements(fb->Attachment); i++) {
1967       if (fb->Attachment[i].Renderbuffer == rb)
1968          return &fb->Attachment[i];
1969    }
1970    return NULL;
1971 }
1972
1973
1974
1975 /**
1976  * Blit rectangular region, optionally from one framebuffer to another.
1977  *
1978  * Note, if the src buffer is multisampled and the dest is not, this is
1979  * when the samples must be resolved to a single color.
1980  */
1981 void GLAPIENTRY
1982 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1983                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1984                          GLbitfield mask, GLenum filter)
1985 {
1986    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
1987                                      GL_DEPTH_BUFFER_BIT |
1988                                      GL_STENCIL_BUFFER_BIT);
1989    const struct gl_framebuffer *readFb, *drawFb;
1990    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
1991    GET_CURRENT_CONTEXT(ctx);
1992
1993    ASSERT_OUTSIDE_BEGIN_END(ctx);
1994    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1995
1996    if (ctx->NewState) {
1997       _mesa_update_state(ctx);
1998    }
1999
2000    readFb = ctx->ReadBuffer;
2001    drawFb = ctx->DrawBuffer;
2002
2003    if (!readFb || !drawFb) {
2004       /* This will normally never happen but someday we may want to
2005        * support MakeCurrent() with no drawables.
2006        */
2007       return;
2008    }
2009
2010    /* check for complete framebuffers */
2011    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2012        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2013       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2014                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2015       return;
2016    }
2017
2018    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2019       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2020       return;
2021    }
2022
2023    if (mask & ~legalMaskBits) {
2024       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2025       return;
2026    }
2027
2028    /* depth/stencil must be blitted with nearest filtering */
2029    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2030         && filter != GL_NEAREST) {
2031       _mesa_error(ctx, GL_INVALID_OPERATION,
2032              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2033       return;
2034    }
2035
2036    /* get color read/draw renderbuffers */
2037    if (mask & GL_COLOR_BUFFER_BIT) {
2038       colorReadRb = readFb->_ColorReadBuffer;
2039       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2040    }
2041    else {
2042       colorReadRb = colorDrawRb = NULL;
2043    }
2044
2045    if (mask & GL_STENCIL_BUFFER_BIT) {
2046       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2047       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2048       if (!readRb ||
2049           !drawRb ||
2050           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2051           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2052          _mesa_error(ctx, GL_INVALID_OPERATION,
2053                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2054          return;
2055       }
2056    }
2057
2058    if (mask & GL_DEPTH_BUFFER_BIT) {
2059       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2060       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2061       if (!readRb ||
2062           !drawRb ||
2063           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2064           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2065          _mesa_error(ctx, GL_INVALID_OPERATION,
2066                      "glBlitFramebufferEXT(depth buffer size mismatch");
2067          return;
2068       }
2069    }
2070
2071    if (readFb->Visual.samples > 0 &&
2072        drawFb->Visual.samples > 0 &&
2073        readFb->Visual.samples != drawFb->Visual.samples) {
2074       _mesa_error(ctx, GL_INVALID_OPERATION,
2075                   "glBlitFramebufferEXT(mismatched samples");
2076       return;
2077    }
2078
2079    /* extra checks for multisample copies... */
2080    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2081       /* src and dest region sizes must be the same */
2082       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2083           srcY1 - srcY0 != dstY1 - dstY0) {
2084          _mesa_error(ctx, GL_INVALID_OPERATION,
2085                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2086          return;
2087       }
2088
2089       /* color formats must match */
2090       if (colorReadRb &&
2091           colorDrawRb &&
2092           colorReadRb->Format != colorDrawRb->Format) {
2093          _mesa_error(ctx, GL_INVALID_OPERATION,
2094                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2095          return;
2096       }
2097    }
2098
2099    if (!ctx->Extensions.EXT_framebuffer_blit) {
2100       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2101       return;
2102    }
2103
2104    /* Debug code */
2105    if (DEBUG_BLIT) {
2106       _mesa_printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2107                    " 0x%x, 0x%x)\n",
2108                    srcX0, srcY0, srcX1, srcY1,
2109                    dstX0, dstY0, dstX1, dstY1,
2110                    mask, filter);
2111       if (colorReadRb) {
2112          const struct gl_renderbuffer_attachment *att;
2113
2114          att = find_attachment(readFb, colorReadRb);
2115          _mesa_printf("  Src FBO %u  RB %u (%dx%d)  ",
2116                       readFb->Name, colorReadRb->Name,
2117                       colorReadRb->Width, colorReadRb->Height);
2118          if (att && att->Texture) {
2119             _mesa_printf("Tex %u  tgt 0x%x  level %u  face %u",
2120                          att->Texture->Name,
2121                          att->Texture->Target,
2122                          att->TextureLevel,
2123                          att->CubeMapFace);
2124          }
2125          _mesa_printf("\n");
2126
2127          att = find_attachment(drawFb, colorDrawRb);
2128          _mesa_printf("  Dst FBO %u  RB %u (%dx%d)  ",
2129                       drawFb->Name, colorDrawRb->Name,
2130                       colorDrawRb->Width, colorDrawRb->Height);
2131          if (att && att->Texture) {
2132             _mesa_printf("Tex %u  tgt 0x%x  level %u  face %u",
2133                          att->Texture->Name,
2134                          att->Texture->Target,
2135                          att->TextureLevel,
2136                          att->CubeMapFace);
2137          }
2138          _mesa_printf("\n");
2139       }
2140    }
2141
2142    ASSERT(ctx->Driver.BlitFramebuffer);
2143    ctx->Driver.BlitFramebuffer(ctx,
2144                                srcX0, srcY0, srcX1, srcY1,
2145                                dstX0, dstY0, dstX1, dstY1,
2146                                mask, filter);
2147 }
2148 #endif /* FEATURE_EXT_framebuffer_blit */