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