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