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 "formats.h"
  39 #include "framebuffer.h"
  40 #include "hash.h"
  41 #include "macros.h"
  42 #include "mipmap.h"
  43 #include "renderbuffer.h"
  44 #include "state.h"
  45 #include "teximage.h"
  46 #include "texobj.h"
  47 #include "texstore.h"
  48
  49
  50 /** Set this to 1 to help debug FBO incompleteness problems */
  51 #define DEBUG_FBO 1
  52
  53
  54 /**
  55  * Notes:
  56  *
  57  * None of the GL_EXT_framebuffer_object functions are compiled into
  58  * display lists.
  59  */
  60
  61
  62
  63 /*
  64  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  65  * these placeholder objects into the hash table.
  66  * Later, when the object ID is first bound, we replace the placeholder
  67  * with the real frame/renderbuffer.
  68  */
  69 static struct gl_framebuffer DummyFramebuffer;
  70 static struct gl_renderbuffer DummyRenderbuffer;
  71
  72
  73 #define IS_CUBE_FACE(TARGET) \
  74    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  75     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  76
  77
  78 static void
  79 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  80 {
  81    /* no op */
  82 }
  83
  84 static void
  85 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  86 {
  87    /* no op */
  88 }
  89
  90
  91 void
  92 _mesa_init_fbobjects(GLcontext *ctx)
  93 {
  94    DummyFramebuffer.Delete = delete_dummy_framebuffer;
  95    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
  96 }
  97
  98
  99 /**
 100  * Helper routine for getting a gl_renderbuffer.
 101  */
 102 struct gl_renderbuffer *
 103 _mesa_lookup_renderbuffer(GLcontext *ctx, GLuint id)
 104 {
 105    struct gl_renderbuffer *rb;
 106
 107    if (id == 0)
 108       return NULL;
 109
 110    rb = (struct gl_renderbuffer *)
 111       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 112    return rb;
 113 }
 114
 115
 116 /**
 117  * Helper routine for getting a gl_framebuffer.
 118  */
 119 struct gl_framebuffer *
 120 _mesa_lookup_framebuffer(GLcontext *ctx, GLuint id)
 121 {
 122    struct gl_framebuffer *fb;
 123
 124    if (id == 0)
 125       return NULL;
 126
 127    fb = (struct gl_framebuffer *)
 128       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 129    return fb;
 130 }
 131
 132
 133 /**
 134  * Mark the given framebuffer as invalid.  This will force the
 135  * test for framebuffer completeness to be done before the framebuffer
 136  * is used.
 137  */
 138 static void
 139 invalidate_framebuffer(struct gl_framebuffer *fb)
 140 {
 141    fb->_Status = 0; /* "indeterminate" */
 142 }
 143
 144
 145 /**
 146  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 147  * gl_renderbuffer_attachment object.
 148  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 149  * the depth buffer attachment point.
 150  */
 151 struct gl_renderbuffer_attachment *
 152 _mesa_get_attachment(GLcontext *ctx, struct gl_framebuffer *fb,
 153                      GLenum attachment)
 154 {
 155    GLuint i;
 156
 157    switch (attachment) {
 158    case GL_COLOR_ATTACHMENT0_EXT:
 159    case GL_COLOR_ATTACHMENT1_EXT:
 160    case GL_COLOR_ATTACHMENT2_EXT:
 161    case GL_COLOR_ATTACHMENT3_EXT:
 162    case GL_COLOR_ATTACHMENT4_EXT:
 163    case GL_COLOR_ATTACHMENT5_EXT:
 164    case GL_COLOR_ATTACHMENT6_EXT:
 165    case GL_COLOR_ATTACHMENT7_EXT:
 166    case GL_COLOR_ATTACHMENT8_EXT:
 167    case GL_COLOR_ATTACHMENT9_EXT:
 168    case GL_COLOR_ATTACHMENT10_EXT:
 169    case GL_COLOR_ATTACHMENT11_EXT:
 170    case GL_COLOR_ATTACHMENT12_EXT:
 171    case GL_COLOR_ATTACHMENT13_EXT:
 172    case GL_COLOR_ATTACHMENT14_EXT:
 173    case GL_COLOR_ATTACHMENT15_EXT:
 174       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 175       if (i >= ctx->Const.MaxColorAttachments) {
 176          return NULL;
 177       }
 178       return &fb->Attachment[BUFFER_COLOR0 + i];
 179    case GL_DEPTH_STENCIL_ATTACHMENT:
 180       /* fall-through */
 181    case GL_DEPTH_ATTACHMENT_EXT:
 182       return &fb->Attachment[BUFFER_DEPTH];
 183    case GL_STENCIL_ATTACHMENT_EXT:
 184       return &fb->Attachment[BUFFER_STENCIL];
 185    default:
 186       return NULL;
 187    }
 188 }
 189
 190
 191 /**
 192  * Remove any texture or renderbuffer attached to the given attachment
 193  * point.  Update reference counts, etc.
 194  */
 195 void
 196 _mesa_remove_attachment(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
 197 {
 198    if (att->Type == GL_TEXTURE) {
 199       ASSERT(att->Texture);
 200       if (ctx->Driver.FinishRenderTexture) {
 201          /* tell driver that we're done rendering to this texture. */
 202          ctx->Driver.FinishRenderTexture(ctx, att);
 203       }
 204       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 205       ASSERT(!att->Texture);
 206    }
 207    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 208       ASSERT(!att->Texture);
 209       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 210       ASSERT(!att->Renderbuffer);
 211    }
 212    att->Type = GL_NONE;
 213    att->Complete = GL_TRUE;
 214 }
 215
 216
 217 /**
 218  * Bind a texture object to an attachment point.
 219  * The previous binding, if any, will be removed first.
 220  */
 221 void
 222 _mesa_set_texture_attachment(GLcontext *ctx,
 223                              struct gl_framebuffer *fb,
 224                              struct gl_renderbuffer_attachment *att,
 225                              struct gl_texture_object *texObj,
 226                              GLenum texTarget, GLuint level, GLuint zoffset)
 227 {
 228    if (att->Texture == texObj) {
 229       /* re-attaching same texture */
 230       ASSERT(att->Type == GL_TEXTURE);
 231    }
 232    else {
 233       /* new attachment */
 234       _mesa_remove_attachment(ctx, att);
 235       att->Type = GL_TEXTURE;
 236       assert(!att->Texture);
 237       _mesa_reference_texobj(&att->Texture, texObj);
 238    }
 239
 240    /* always update these fields */
 241    att->TextureLevel = level;
 242    if (IS_CUBE_FACE(texTarget)) {
 243       att->CubeMapFace = texTarget - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 244    }
 245    else {
 246       att->CubeMapFace = 0;
 247    }
 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 #endif
 654
 655    if (numImages == 0) {
 656       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 657       fbo_incomplete("no attachments", -1);
 658       return;
 659    }
 660
 661    /* Provisionally set status = COMPLETE ... */
 662    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 663
 664    /* ... but the driver may say the FB is incomplete.
 665     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 666     * if anything.
 667     */
 668    if (ctx->Driver.ValidateFramebuffer) {
 669       ctx->Driver.ValidateFramebuffer(ctx, fb);
 670       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 671          fbo_incomplete("driver marked FBO as incomplete", -1);
 672       }
 673    }
 674
 675    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 676       /*
 677        * Note that if ARB_framebuffer_object is supported and the attached
 678        * renderbuffers/textures are different sizes, the framebuffer
 679        * width/height will be set to the smallest width/height.
 680        */
 681       fb->Width = minWidth;
 682       fb->Height = minHeight;
 683
 684       /* finally, update the visual info for the framebuffer */
 685       _mesa_update_framebuffer_visual(fb);
 686    }
 687 }
 688
 689
 690 GLboolean GLAPIENTRY
 691 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 692 {
 693    GET_CURRENT_CONTEXT(ctx);
 694    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 695    if (renderbuffer) {
 696       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 697       if (rb != NULL && rb != &DummyRenderbuffer)
 698          return GL_TRUE;
 699    }
 700    return GL_FALSE;
 701 }
 702
 703
 704 void GLAPIENTRY
 705 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 706 {
 707    struct gl_renderbuffer *newRb;
 708    GET_CURRENT_CONTEXT(ctx);
 709
 710    ASSERT_OUTSIDE_BEGIN_END(ctx);
 711
 712    if (target != GL_RENDERBUFFER_EXT) {
 713          _mesa_error(ctx, GL_INVALID_ENUM,
 714                   "glBindRenderbufferEXT(target)");
 715       return;
 716    }
 717
 718    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
 719    /* The above doesn't fully flush the drivers in the way that a
 720     * glFlush does, but that is required here:
 721     */
 722    if (ctx->Driver.Flush)
 723       ctx->Driver.Flush(ctx);
 724
 725
 726    if (renderbuffer) {
 727       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 728       if (newRb == &DummyRenderbuffer) {
 729          /* ID was reserved, but no real renderbuffer object made yet */
 730          newRb = NULL;
 731       }
 732       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 733          /* All RB IDs must be Gen'd */
 734          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 735          return;
 736       }
 737
 738       if (!newRb) {
 739          /* create new renderbuffer object */
 740          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 741          if (!newRb) {
 742             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 743             return;
 744          }
 745          ASSERT(newRb->AllocStorage);
 746          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 747          newRb->RefCount = 1; /* referenced by hash table */
 748       }
 749    }
 750    else {
 751       newRb = NULL;
 752    }
 753
 754    ASSERT(newRb != &DummyRenderbuffer);
 755
 756    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 757 }
 758
 759
 760 /**
 761  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 762  * the renderbuffer.
 763  * This is used when a renderbuffer object is deleted.
 764  * The spec calls for unbinding.
 765  */
 766 static void
 767 detach_renderbuffer(GLcontext *ctx,
 768                     struct gl_framebuffer *fb,
 769                     struct gl_renderbuffer *rb)
 770 {
 771    GLuint i;
 772    for (i = 0; i < BUFFER_COUNT; i++) {
 773       if (fb->Attachment[i].Renderbuffer == rb) {
 774          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 775       }
 776    }
 777    invalidate_framebuffer(fb);
 778 }
 779
 780
 781 void GLAPIENTRY
 782 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 783 {
 784    GLint i;
 785    GET_CURRENT_CONTEXT(ctx);
 786
 787    ASSERT_OUTSIDE_BEGIN_END(ctx);
 788    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 789
 790    for (i = 0; i < n; i++) {
 791       if (renderbuffers[i] > 0) {
 792          struct gl_renderbuffer *rb;
 793          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 794          if (rb) {
 795             /* check if deleting currently bound renderbuffer object */
 796             if (rb == ctx->CurrentRenderbuffer) {
 797                /* bind default */
 798                ASSERT(rb->RefCount >= 2);
 799                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 800             }
 801
 802             if (ctx->DrawBuffer->Name) {
 803                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 804             }
 805             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 806                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 807             }
 808
 809             /* Remove from hash table immediately, to free the ID.
 810              * But the object will not be freed until it's no longer
 811              * referenced anywhere else.
 812              */
 813             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 814
 815             if (rb != &DummyRenderbuffer) {
 816                /* no longer referenced by hash table */
 817                _mesa_reference_renderbuffer(&rb, NULL);
 818             }
 819          }
 820       }
 821    }
 822 }
 823
 824
 825 void GLAPIENTRY
 826 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 827 {
 828    GET_CURRENT_CONTEXT(ctx);
 829    GLuint first;
 830    GLint i;
 831
 832    ASSERT_OUTSIDE_BEGIN_END(ctx);
 833
 834    if (n < 0) {
 835       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 836       return;
 837    }
 838
 839    if (!renderbuffers)
 840       return;
 841
 842    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 843
 844    for (i = 0; i < n; i++) {
 845       GLuint name = first + i;
 846       renderbuffers[i] = name;
 847       /* insert dummy placeholder into hash table */
 848       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 849       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 850       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 851    }
 852 }
 853
 854
 855 /**
 856  * Given an internal format token for a render buffer, return the
 857  * corresponding base format.
 858  * This is very similar to _mesa_base_tex_format() but the set of valid
 859  * internal formats is somewhat different.
 860  *
 861  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 862  *  GL_DEPTH_STENCIL_EXT or zero if error.
 863  */
 864 GLenum
 865 _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
 866 {
 867    switch (internalFormat) {
 868    case GL_RGB:
 869    case GL_R3_G3_B2:
 870    case GL_RGB4:
 871    case GL_RGB5:
 872    case GL_RGB8:
 873    case GL_RGB10:
 874    case GL_RGB12:
 875    case GL_RGB16:
 876       return GL_RGB;
 877    case GL_RGBA:
 878    case GL_RGBA2:
 879    case GL_RGBA4:
 880    case GL_RGB5_A1:
 881    case GL_RGBA8:
 882    case GL_RGB10_A2:
 883    case GL_RGBA12:
 884    case GL_RGBA16:
 885       return GL_RGBA;
 886    case GL_STENCIL_INDEX:
 887    case GL_STENCIL_INDEX1_EXT:
 888    case GL_STENCIL_INDEX4_EXT:
 889    case GL_STENCIL_INDEX8_EXT:
 890    case GL_STENCIL_INDEX16_EXT:
 891       return GL_STENCIL_INDEX;
 892    case GL_DEPTH_COMPONENT:
 893    case GL_DEPTH_COMPONENT16:
 894    case GL_DEPTH_COMPONENT24:
 895    case GL_DEPTH_COMPONENT32:
 896       return GL_DEPTH_COMPONENT;
 897    case GL_DEPTH_STENCIL_EXT:
 898    case GL_DEPTH24_STENCIL8_EXT:
 899       if (ctx->Extensions.EXT_packed_depth_stencil)
 900          return GL_DEPTH_STENCIL_EXT;
 901       else
 902          return 0;
 903    /* XXX add floating point formats eventually */
 904    default:
 905       return 0;
 906    }
 907 }
 908
 909
 910 /** sentinal value, see below */
 911 #define NO_SAMPLES 1000
 912
 913
 914 /**
 915  * Helper function used by _mesa_RenderbufferStorageEXT() and
 916  * _mesa_RenderbufferStorageMultisample().
 917  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
 918  */
 919 static void
 920 renderbuffer_storage(GLenum target, GLenum internalFormat,
 921                      GLsizei width, GLsizei height, GLsizei samples)
 922 {
 923    const char *func = samples == NO_SAMPLES ?
 924       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
 925    struct gl_renderbuffer *rb;
 926    GLenum baseFormat;
 927    GET_CURRENT_CONTEXT(ctx);
 928
 929    ASSERT_OUTSIDE_BEGIN_END(ctx);
 930
 931    if (target != GL_RENDERBUFFER_EXT) {
 932       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
 933       return;
 934    }
 935
 936    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 937    if (baseFormat == 0) {
 938       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
 939       return;
 940    }
 941
 942    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 943       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
 944       return;
 945    }
 946
 947    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 948       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
 949       return;
 950    }
 951
 952    if (samples == NO_SAMPLES) {
 953       /* NumSamples == 0 indicates non-multisampling */
 954       samples = 0;
 955    }
 956    else if (samples > ctx->Const.MaxSamples) {
 957       /* note: driver may choose to use more samples than what's requested */
 958       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
 959       return;
 960    }
 961
 962    rb = ctx->CurrentRenderbuffer;
 963    if (!rb) {
 964       _mesa_error(ctx, GL_INVALID_OPERATION, func);
 965       return;
 966    }
 967
 968    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 969
 970    if (rb->InternalFormat == internalFormat &&
 971        rb->Width == (GLuint) width &&
 972        rb->Height == (GLuint) height) {
 973       /* no change in allocation needed */
 974       return;
 975    }
 976
 977    /* These MUST get set by the AllocStorage func */
 978    rb->Format = MESA_FORMAT_NONE;
 979    rb->NumSamples = samples;
 980
 981    /* Now allocate the storage */
 982    ASSERT(rb->AllocStorage);
 983    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
 984       /* No error - check/set fields now */
 985       assert(rb->Format != MESA_FORMAT_NONE);
 986       assert(rb->Width == (GLuint) width);
 987       assert(rb->Height == (GLuint) height);
 988       rb->InternalFormat = internalFormat;
 989       rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 990       assert(rb->_BaseFormat != 0);
 991    }
 992    else {
 993       /* Probably ran out of memory - clear the fields */
 994       rb->Width = 0;
 995       rb->Height = 0;
 996       rb->Format = MESA_FORMAT_NONE;
 997       rb->InternalFormat = GL_NONE;
 998       rb->_BaseFormat = GL_NONE;
 999       rb->NumSamples = 0;
1000    }
1001
1002    /*
1003    test_framebuffer_completeness(ctx, fb);
1004    */
1005    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1006     * points???
1007     */
1008 }
1009
1010
1011 /**
1012  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1013  * _mesa_GetFramebufferAttachmentParameterivEXT()
1014  * We have to be careful to respect the base format.  For example, if a
1015  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1016  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1017  * we need to return zero.
1018  */
1019 static GLint
1020 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1021 {
1022    switch (pname) {
1023    case GL_RENDERBUFFER_RED_SIZE_EXT:
1024    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1025    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1026    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1027    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1028    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1029       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1030          return _mesa_get_format_bits(format, pname);
1031       else
1032          return 0;
1033    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1034    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1035       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA)
1036          return _mesa_get_format_bits(format, pname);
1037       else
1038          return 0;
1039    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1040    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1041       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1042          return _mesa_get_format_bits(format, pname);
1043       else
1044          return 0;
1045    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1046    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1047       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1048          return _mesa_get_format_bits(format, pname);
1049       else
1050          return 0;
1051    default:
1052       return 0;
1053    }
1054 }
1055
1056
1057
1058 void GLAPIENTRY
1059 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1060                              GLsizei width, GLsizei height)
1061 {
1062    /* GL_ARB_fbo says calling this function is equivalent to calling
1063     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1064     * a token value here just for error reporting purposes.
1065     */
1066    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1067 }
1068
1069
1070 void GLAPIENTRY
1071 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1072                                      GLenum internalFormat,
1073                                      GLsizei width, GLsizei height)
1074 {
1075    renderbuffer_storage(target, internalFormat, width, height, samples);
1076 }
1077
1078
1079
1080 void GLAPIENTRY
1081 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1082 {
1083    struct gl_renderbuffer *rb;
1084    GET_CURRENT_CONTEXT(ctx);
1085
1086    ASSERT_OUTSIDE_BEGIN_END(ctx);
1087
1088    if (target != GL_RENDERBUFFER_EXT) {
1089       _mesa_error(ctx, GL_INVALID_ENUM,
1090                   "glGetRenderbufferParameterivEXT(target)");
1091       return;
1092    }
1093
1094    rb = ctx->CurrentRenderbuffer;
1095    if (!rb) {
1096       _mesa_error(ctx, GL_INVALID_OPERATION,
1097                   "glGetRenderbufferParameterivEXT");
1098       return;
1099    }
1100
1101    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1102
1103    switch (pname) {
1104    case GL_RENDERBUFFER_WIDTH_EXT:
1105       *params = rb->Width;
1106       return;
1107    case GL_RENDERBUFFER_HEIGHT_EXT:
1108       *params = rb->Height;
1109       return;
1110    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1111       *params = rb->InternalFormat;
1112       return;
1113    case GL_RENDERBUFFER_RED_SIZE_EXT:
1114    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1115    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1116    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1117    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1118    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1119       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1120       break;
1121    case GL_RENDERBUFFER_SAMPLES:
1122       if (ctx->Extensions.ARB_framebuffer_object) {
1123          *params = rb->NumSamples;
1124          break;
1125       }
1126       /* fallthrough */
1127    default:
1128       _mesa_error(ctx, GL_INVALID_ENUM,
1129                   "glGetRenderbufferParameterivEXT(target)");
1130       return;
1131    }
1132 }
1133
1134
1135 GLboolean GLAPIENTRY
1136 _mesa_IsFramebufferEXT(GLuint framebuffer)
1137 {
1138    GET_CURRENT_CONTEXT(ctx);
1139    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1140    if (framebuffer) {
1141       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1142       if (rb != NULL && rb != &DummyFramebuffer)
1143          return GL_TRUE;
1144    }
1145    return GL_FALSE;
1146 }
1147
1148
1149 static void
1150 check_begin_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1151 {
1152    GLuint i;
1153    ASSERT(ctx->Driver.RenderTexture);
1154    for (i = 0; i < BUFFER_COUNT; i++) {
1155       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1156       struct gl_texture_object *texObj = att->Texture;
1157       if (texObj
1158           && att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
1159          ctx->Driver.RenderTexture(ctx, fb, att);
1160       }
1161    }
1162 }
1163
1164
1165 /**
1166  * Examine all the framebuffer's attachments to see if any are textures.
1167  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1168  * notify the device driver that the texture image may have changed.
1169  */
1170 static void
1171 check_end_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1172 {
1173    if (ctx->Driver.FinishRenderTexture) {
1174       GLuint i;
1175       for (i = 0; i < BUFFER_COUNT; i++) {
1176          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1177          if (att->Texture && att->Renderbuffer) {
1178             ctx->Driver.FinishRenderTexture(ctx, att);
1179          }
1180       }
1181    }
1182 }
1183
1184
1185 void GLAPIENTRY
1186 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1187 {
1188    struct gl_framebuffer *newFb, *newFbread;
1189    GLboolean bindReadBuf, bindDrawBuf;
1190    GET_CURRENT_CONTEXT(ctx);
1191
1192 #ifdef DEBUG
1193    if (ctx->Extensions.ARB_framebuffer_object) {
1194       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1195       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1196    }
1197 #endif
1198
1199    ASSERT_OUTSIDE_BEGIN_END(ctx);
1200
1201    if (!ctx->Extensions.EXT_framebuffer_object) {
1202       _mesa_error(ctx, GL_INVALID_OPERATION,
1203                   "glBindFramebufferEXT(unsupported)");
1204       return;
1205    }
1206
1207    switch (target) {
1208 #if FEATURE_EXT_framebuffer_blit
1209    case GL_DRAW_FRAMEBUFFER_EXT:
1210       if (!ctx->Extensions.EXT_framebuffer_blit) {
1211          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1212          return;
1213       }
1214       bindDrawBuf = GL_TRUE;
1215       bindReadBuf = GL_FALSE;
1216       break;
1217    case GL_READ_FRAMEBUFFER_EXT:
1218       if (!ctx->Extensions.EXT_framebuffer_blit) {
1219          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1220          return;
1221       }
1222       bindDrawBuf = GL_FALSE;
1223       bindReadBuf = GL_TRUE;
1224       break;
1225 #endif
1226    case GL_FRAMEBUFFER_EXT:
1227       bindDrawBuf = GL_TRUE;
1228       bindReadBuf = GL_TRUE;
1229       break;
1230    default:
1231       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1232       return;
1233    }
1234
1235    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1236    if (ctx->Driver.Flush) {
1237       ctx->Driver.Flush(ctx);
1238    }
1239
1240    if (framebuffer) {
1241       /* Binding a user-created framebuffer object */
1242       newFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1243       if (newFb == &DummyFramebuffer) {
1244          /* ID was reserved, but no real framebuffer object made yet */
1245          newFb = NULL;
1246       }
1247       else if (!newFb && ctx->Extensions.ARB_framebuffer_object) {
1248          /* All FBO IDs must be Gen'd */
1249          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1250          return;
1251       }
1252
1253       if (!newFb) {
1254          /* create new framebuffer object */
1255          newFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1256          if (!newFb) {
1257             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1258             return;
1259          }
1260          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
1261       }
1262       newFbread = newFb;
1263    }
1264    else {
1265       /* Binding the window system framebuffer (which was originally set
1266        * with MakeCurrent).
1267        */
1268       newFb = ctx->WinSysDrawBuffer;
1269       newFbread = ctx->WinSysReadBuffer;
1270    }
1271
1272    ASSERT(newFb);
1273    ASSERT(newFb != &DummyFramebuffer);
1274
1275    /*
1276     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1277     */
1278
1279    if (bindReadBuf) {
1280       if (ctx->ReadBuffer == newFbread)
1281          bindReadBuf = GL_FALSE; /* no change */
1282       else
1283          _mesa_reference_framebuffer(&ctx->ReadBuffer, newFbread);
1284    }
1285
1286    if (bindDrawBuf) {
1287       /* check if old FB had any texture attachments */
1288       if (ctx->DrawBuffer->Name != 0) {
1289          check_end_texture_render(ctx, ctx->DrawBuffer);
1290       }
1291
1292       if (ctx->DrawBuffer == newFb)
1293          bindDrawBuf = GL_FALSE; /* no change */
1294       else
1295          _mesa_reference_framebuffer(&ctx->DrawBuffer, newFb);
1296
1297       if (newFb->Name != 0) {
1298          /* check if newly bound framebuffer has any texture attachments */
1299          check_begin_texture_render(ctx, newFb);
1300       }
1301    }
1302
1303    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1304       ctx->Driver.BindFramebuffer(ctx, target, newFb, newFbread);
1305    }
1306 }
1307
1308
1309 void GLAPIENTRY
1310 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1311 {
1312    GLint i;
1313    GET_CURRENT_CONTEXT(ctx);
1314
1315    ASSERT_OUTSIDE_BEGIN_END(ctx);
1316    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1317    /* The above doesn't fully flush the drivers in the way that a
1318     * glFlush does, but that is required here:
1319     */
1320    if (ctx->Driver.Flush)
1321       ctx->Driver.Flush(ctx);
1322
1323    for (i = 0; i < n; i++) {
1324       if (framebuffers[i] > 0) {
1325          struct gl_framebuffer *fb;
1326          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1327          if (fb) {
1328             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1329
1330             /* check if deleting currently bound framebuffer object */
1331             if (fb == ctx->DrawBuffer) {
1332                /* bind default */
1333                ASSERT(fb->RefCount >= 2);
1334                _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1335             }
1336             if (fb == ctx->ReadBuffer) {
1337                /* bind default */
1338                ASSERT(fb->RefCount >= 2);
1339                _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1340             }
1341
1342             /* remove from hash table immediately, to free the ID */
1343             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1344
1345             if (fb != &DummyFramebuffer) {
1346                /* But the object will not be freed until it's no longer
1347                 * bound in any context.
1348                 */
1349                _mesa_reference_framebuffer(&fb, NULL);
1350             }
1351          }
1352       }
1353    }
1354 }
1355
1356
1357 void GLAPIENTRY
1358 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1359 {
1360    GET_CURRENT_CONTEXT(ctx);
1361    GLuint first;
1362    GLint i;
1363
1364    ASSERT_OUTSIDE_BEGIN_END(ctx);
1365
1366    if (n < 0) {
1367       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1368       return;
1369    }
1370
1371    if (!framebuffers)
1372       return;
1373
1374    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1375
1376    for (i = 0; i < n; i++) {
1377       GLuint name = first + i;
1378       framebuffers[i] = name;
1379       /* insert dummy placeholder into hash table */
1380       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1381       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1382       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1383    }
1384 }
1385
1386
1387
1388 GLenum GLAPIENTRY
1389 _mesa_CheckFramebufferStatusEXT(GLenum target)
1390 {
1391    struct gl_framebuffer *buffer;
1392    GET_CURRENT_CONTEXT(ctx);
1393
1394    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1395
1396    switch (target) {
1397 #if FEATURE_EXT_framebuffer_blit
1398    case GL_DRAW_FRAMEBUFFER_EXT:
1399       if (!ctx->Extensions.EXT_framebuffer_blit) {
1400          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1401          return 0;
1402       }
1403       buffer = ctx->DrawBuffer;
1404       break;
1405    case GL_READ_FRAMEBUFFER_EXT:
1406       if (!ctx->Extensions.EXT_framebuffer_blit) {
1407          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1408          return 0;
1409       }
1410       buffer = ctx->ReadBuffer;
1411       break;
1412 #endif
1413    case GL_FRAMEBUFFER_EXT:
1414       buffer = ctx->DrawBuffer;
1415       break;
1416    default:
1417       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1418       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1419    }
1420
1421    if (buffer->Name == 0) {
1422       /* The window system / default framebuffer is always complete */
1423       return GL_FRAMEBUFFER_COMPLETE_EXT;
1424    }
1425
1426    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1427
1428    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1429       _mesa_test_framebuffer_completeness(ctx, buffer);
1430    }
1431
1432    return buffer->_Status;
1433 }
1434
1435
1436
1437 /**
1438  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1439  */
1440 static void
1441 framebuffer_texture(GLcontext *ctx, const char *caller, GLenum target,
1442                     GLenum attachment, GLenum textarget, GLuint texture,
1443                     GLint level, GLint zoffset)
1444 {
1445    struct gl_renderbuffer_attachment *att;
1446    struct gl_texture_object *texObj = NULL;
1447    struct gl_framebuffer *fb;
1448    GLboolean error = GL_FALSE;
1449
1450    ASSERT_OUTSIDE_BEGIN_END(ctx);
1451
1452    switch (target) {
1453    case GL_READ_FRAMEBUFFER_EXT:
1454       error = !ctx->Extensions.EXT_framebuffer_blit;
1455       fb = ctx->ReadBuffer;
1456       break;
1457    case GL_DRAW_FRAMEBUFFER_EXT:
1458       error = !ctx->Extensions.EXT_framebuffer_blit;
1459       /* fall-through */
1460    case GL_FRAMEBUFFER_EXT:
1461       fb = ctx->DrawBuffer;
1462       break;
1463    default:
1464       error = GL_TRUE;
1465    }
1466
1467    if (error) {
1468       _mesa_error(ctx, GL_INVALID_ENUM,
1469                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1470       return;
1471    }
1472
1473    ASSERT(fb);
1474
1475    /* check framebuffer binding */
1476    if (fb->Name == 0) {
1477       _mesa_error(ctx, GL_INVALID_OPERATION,
1478                   "glFramebufferTexture%sEXT", caller);
1479       return;
1480    }
1481
1482
1483    /* The textarget, level, and zoffset parameters are only validated if
1484     * texture is non-zero.
1485     */
1486    if (texture) {
1487       GLboolean err = GL_TRUE;
1488
1489       texObj = _mesa_lookup_texture(ctx, texture);
1490       if (texObj != NULL) {
1491          if (textarget == 0) {
1492             err = (texObj->Target != GL_TEXTURE_3D) &&
1493                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1494                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1495          }
1496          else {
1497             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1498                 ? !IS_CUBE_FACE(textarget)
1499                 : (texObj->Target != textarget);
1500          }
1501       }
1502
1503       if (err) {
1504          _mesa_error(ctx, GL_INVALID_OPERATION,
1505                      "glFramebufferTexture%sEXT(texture target mismatch)",
1506                      caller);
1507          return;
1508       }
1509
1510       if (texObj->Target == GL_TEXTURE_3D) {
1511          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1512          if (zoffset < 0 || zoffset >= maxSize) {
1513             _mesa_error(ctx, GL_INVALID_VALUE,
1514                         "glFramebufferTexture%sEXT(zoffset)", caller);
1515             return;
1516          }
1517       }
1518       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1519                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1520          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1521             _mesa_error(ctx, GL_INVALID_VALUE,
1522                         "glFramebufferTexture%sEXT(layer)", caller);
1523             return;
1524          }
1525       }
1526
1527       if ((level < 0) ||
1528           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1529          _mesa_error(ctx, GL_INVALID_VALUE,
1530                      "glFramebufferTexture%sEXT(level)", caller);
1531          return;
1532       }
1533    }
1534
1535    att = _mesa_get_attachment(ctx, fb, attachment);
1536    if (att == NULL) {
1537       _mesa_error(ctx, GL_INVALID_ENUM,
1538                   "glFramebufferTexture%sEXT(attachment)", caller);
1539       return;
1540    }
1541
1542    if (texObj && attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1543       /* the texture format must be depth+stencil */
1544       const struct gl_texture_image *texImg;
1545       texImg = texObj->Image[0][texObj->BaseLevel];
1546       if (!texImg || texImg->_BaseFormat != GL_DEPTH_STENCIL) {
1547          _mesa_error(ctx, GL_INVALID_OPERATION,
1548                      "glFramebufferTexture%sEXT(texture is not"
1549                      " DEPTH_STENCIL format)", caller);
1550          return;
1551       }
1552    }
1553
1554    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1555    /* The above doesn't fully flush the drivers in the way that a
1556     * glFlush does, but that is required here:
1557     */
1558    if (ctx->Driver.Flush)
1559       ctx->Driver.Flush(ctx);
1560
1561    _glthread_LOCK_MUTEX(fb->Mutex);
1562    if (texObj) {
1563       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1564                                    level, zoffset);
1565       /* Set the render-to-texture flag.  We'll check this flag in
1566        * glTexImage() and friends to determine if we need to revalidate
1567        * any FBOs that might be rendering into this texture.
1568        * This flag never gets cleared since it's non-trivial to determine
1569        * when all FBOs might be done rendering to this texture.  That's OK
1570        * though since it's uncommon to render to a texture then repeatedly
1571        * call glTexImage() to change images in the texture.
1572        */
1573       texObj->_RenderToTexture = GL_TRUE;
1574    }
1575    else {
1576       _mesa_remove_attachment(ctx, att);
1577    }
1578
1579    invalidate_framebuffer(fb);
1580
1581    _glthread_UNLOCK_MUTEX(fb->Mutex);
1582 }
1583
1584
1585
1586 void GLAPIENTRY
1587 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1588                               GLenum textarget, GLuint texture, GLint level)
1589 {
1590    GET_CURRENT_CONTEXT(ctx);
1591
1592    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1593       _mesa_error(ctx, GL_INVALID_ENUM,
1594                   "glFramebufferTexture1DEXT(textarget)");
1595       return;
1596    }
1597
1598    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1599                        level, 0);
1600 }
1601
1602
1603 void GLAPIENTRY
1604 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1605                               GLenum textarget, GLuint texture, GLint level)
1606 {
1607    GET_CURRENT_CONTEXT(ctx);
1608
1609    if ((texture != 0) &&
1610        (textarget != GL_TEXTURE_2D) &&
1611        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1612        (!IS_CUBE_FACE(textarget))) {
1613       _mesa_error(ctx, GL_INVALID_OPERATION,
1614                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1615       return;
1616    }
1617
1618    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1619                        level, 0);
1620 }
1621
1622
1623 void GLAPIENTRY
1624 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1625                               GLenum textarget, GLuint texture,
1626                               GLint level, GLint zoffset)
1627 {
1628    GET_CURRENT_CONTEXT(ctx);
1629
1630    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1631       _mesa_error(ctx, GL_INVALID_ENUM,
1632                   "glFramebufferTexture3DEXT(textarget)");
1633       return;
1634    }
1635
1636    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1637                        level, zoffset);
1638 }
1639
1640
1641 void GLAPIENTRY
1642 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1643                                  GLuint texture, GLint level, GLint layer)
1644 {
1645    GET_CURRENT_CONTEXT(ctx);
1646
1647    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1648                        level, layer);
1649 }
1650
1651
1652 void GLAPIENTRY
1653 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1654                                  GLenum renderbufferTarget,
1655                                  GLuint renderbuffer)
1656 {
1657    struct gl_renderbuffer_attachment *att;
1658    struct gl_framebuffer *fb;
1659    struct gl_renderbuffer *rb;
1660    GET_CURRENT_CONTEXT(ctx);
1661
1662    ASSERT_OUTSIDE_BEGIN_END(ctx);
1663
1664    switch (target) {
1665 #if FEATURE_EXT_framebuffer_blit
1666    case GL_DRAW_FRAMEBUFFER_EXT:
1667       if (!ctx->Extensions.EXT_framebuffer_blit) {
1668          _mesa_error(ctx, GL_INVALID_ENUM,
1669                      "glFramebufferRenderbufferEXT(target)");
1670          return;
1671       }
1672       fb = ctx->DrawBuffer;
1673       break;
1674    case GL_READ_FRAMEBUFFER_EXT:
1675       if (!ctx->Extensions.EXT_framebuffer_blit) {
1676          _mesa_error(ctx, GL_INVALID_ENUM,
1677                      "glFramebufferRenderbufferEXT(target)");
1678          return;
1679       }
1680       fb = ctx->ReadBuffer;
1681       break;
1682 #endif
1683    case GL_FRAMEBUFFER_EXT:
1684       fb = ctx->DrawBuffer;
1685       break;
1686    default:
1687       _mesa_error(ctx, GL_INVALID_ENUM,
1688                   "glFramebufferRenderbufferEXT(target)");
1689       return;
1690    }
1691
1692    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1693       _mesa_error(ctx, GL_INVALID_ENUM,
1694                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1695       return;
1696    }
1697
1698    if (fb->Name == 0) {
1699       /* Can't attach new renderbuffers to a window system framebuffer */
1700       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1701       return;
1702    }
1703
1704    att = _mesa_get_attachment(ctx, fb, attachment);
1705    if (att == NULL) {
1706       _mesa_error(ctx, GL_INVALID_ENUM,
1707                  "glFramebufferRenderbufferEXT(attachment)");
1708       return;
1709    }
1710
1711    if (renderbuffer) {
1712       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1713       if (!rb) {
1714          _mesa_error(ctx, GL_INVALID_OPERATION,
1715                      "glFramebufferRenderbufferEXT(renderbuffer)");
1716          return;
1717       }
1718    }
1719    else {
1720       /* remove renderbuffer attachment */
1721       rb = NULL;
1722    }
1723
1724    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1725       /* make sure the renderbuffer is a depth/stencil format */
1726       const GLenum baseFormat =
1727          _mesa_get_format_base_format(att->Renderbuffer->Format);
1728       if (baseFormat != GL_DEPTH_STENCIL) {
1729          _mesa_error(ctx, GL_INVALID_OPERATION,
1730                      "glFramebufferRenderbufferEXT(renderbuffer"
1731                      " is not DEPTH_STENCIL format)");
1732          return;
1733       }
1734    }
1735
1736
1737    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1738    /* The above doesn't fully flush the drivers in the way that a
1739     * glFlush does, but that is required here:
1740     */
1741    if (ctx->Driver.Flush)
1742       ctx->Driver.Flush(ctx);
1743
1744    assert(ctx->Driver.FramebufferRenderbuffer);
1745    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1746
1747    /* Some subsequent GL commands may depend on the framebuffer's visual
1748     * after the binding is updated.  Update visual info now.
1749     */
1750    _mesa_update_framebuffer_visual(fb);
1751 }
1752
1753
1754 void GLAPIENTRY
1755 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1756                                              GLenum pname, GLint *params)
1757 {
1758    const struct gl_renderbuffer_attachment *att;
1759    struct gl_framebuffer *buffer;
1760    GET_CURRENT_CONTEXT(ctx);
1761
1762    ASSERT_OUTSIDE_BEGIN_END(ctx);
1763
1764    switch (target) {
1765 #if FEATURE_EXT_framebuffer_blit
1766    case GL_DRAW_FRAMEBUFFER_EXT:
1767       if (!ctx->Extensions.EXT_framebuffer_blit) {
1768          _mesa_error(ctx, GL_INVALID_ENUM,
1769                      "glGetFramebufferAttachmentParameterivEXT(target)");
1770          return;
1771       }
1772       buffer = ctx->DrawBuffer;
1773       break;
1774    case GL_READ_FRAMEBUFFER_EXT:
1775       if (!ctx->Extensions.EXT_framebuffer_blit) {
1776          _mesa_error(ctx, GL_INVALID_ENUM,
1777                      "glGetFramebufferAttachmentParameterivEXT(target)");
1778          return;
1779       }
1780       buffer = ctx->ReadBuffer;
1781       break;
1782 #endif
1783    case GL_FRAMEBUFFER_EXT:
1784       buffer = ctx->DrawBuffer;
1785       break;
1786    default:
1787       _mesa_error(ctx, GL_INVALID_ENUM,
1788                   "glGetFramebufferAttachmentParameterivEXT(target)");
1789       return;
1790    }
1791
1792    if (buffer->Name == 0) {
1793       _mesa_error(ctx, GL_INVALID_OPERATION,
1794                   "glGetFramebufferAttachmentParameterivEXT");
1795       return;
1796    }
1797
1798    att = _mesa_get_attachment(ctx, buffer, attachment);
1799    if (att == NULL) {
1800       _mesa_error(ctx, GL_INVALID_ENUM,
1801                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1802       return;
1803    }
1804
1805    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1806       /* the depth and stencil attachments must point to the same buffer */
1807       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
1808       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
1809       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
1810       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
1811          _mesa_error(ctx, GL_INVALID_OPERATION,
1812                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
1813                      " attachments differ)");
1814          return;
1815       }
1816    }
1817
1818    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1819    /* The above doesn't fully flush the drivers in the way that a
1820     * glFlush does, but that is required here:
1821     */
1822    if (ctx->Driver.Flush)
1823       ctx->Driver.Flush(ctx);
1824
1825    switch (pname) {
1826    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
1827       *params = att->Type;
1828       return;
1829    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
1830       if (att->Type == GL_RENDERBUFFER_EXT) {
1831          *params = att->Renderbuffer->Name;
1832       }
1833       else if (att->Type == GL_TEXTURE) {
1834          *params = att->Texture->Name;
1835       }
1836       else {
1837          _mesa_error(ctx, GL_INVALID_ENUM,
1838                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1839       }
1840       return;
1841    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
1842       if (att->Type == GL_TEXTURE) {
1843          *params = att->TextureLevel;
1844       }
1845       else {
1846          _mesa_error(ctx, GL_INVALID_ENUM,
1847                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1848       }
1849       return;
1850    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
1851       if (att->Type == GL_TEXTURE) {
1852          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
1853             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
1854          }
1855          else {
1856             *params = 0;
1857          }
1858       }
1859       else {
1860          _mesa_error(ctx, GL_INVALID_ENUM,
1861                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1862       }
1863       return;
1864    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
1865       if (att->Type == GL_TEXTURE) {
1866          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
1867             *params = att->Zoffset;
1868          }
1869          else {
1870             *params = 0;
1871          }
1872       }
1873       else {
1874          _mesa_error(ctx, GL_INVALID_ENUM,
1875                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1876       }
1877       return;
1878    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
1879       if (!ctx->Extensions.ARB_framebuffer_object) {
1880          _mesa_error(ctx, GL_INVALID_ENUM,
1881                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1882       }
1883       else {
1884          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
1885       }
1886       return;
1887    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
1888       if (!ctx->Extensions.ARB_framebuffer_object) {
1889          _mesa_error(ctx, GL_INVALID_ENUM,
1890                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1891          return;
1892       }
1893       else {
1894          gl_format format = att->Renderbuffer->Format;
1895          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
1896             /* special cases */
1897             *params = GL_INDEX;
1898          }
1899          else {
1900             *params = _mesa_get_format_datatype(format);
1901          }
1902       }
1903       return;
1904    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1905    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1906    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1907    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1908    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1909    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1910       if (!ctx->Extensions.ARB_framebuffer_object) {
1911          _mesa_error(ctx, GL_INVALID_ENUM,
1912                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1913       }
1914       else if (att->Texture) {
1915          const struct gl_texture_image *texImage =
1916             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
1917                                    att->TextureLevel);
1918          if (texImage) {
1919             *params = get_component_bits(pname, texImage->_BaseFormat,
1920                                          texImage->TexFormat);
1921          }
1922          else {
1923             *params = 0;
1924          }
1925       }
1926       else if (att->Renderbuffer) {
1927          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
1928                                       att->Renderbuffer->Format);
1929       }
1930       else {
1931          *params = 0;
1932       }
1933       return;
1934    default:
1935       _mesa_error(ctx, GL_INVALID_ENUM,
1936                   "glGetFramebufferAttachmentParameterivEXT(pname)");
1937       return;
1938    }
1939 }
1940
1941
1942 void GLAPIENTRY
1943 _mesa_GenerateMipmapEXT(GLenum target)
1944 {
1945    struct gl_texture_unit *texUnit;
1946    struct gl_texture_object *texObj;
1947    GET_CURRENT_CONTEXT(ctx);
1948
1949    ASSERT_OUTSIDE_BEGIN_END(ctx);
1950    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1951
1952    switch (target) {
1953    case GL_TEXTURE_1D:
1954    case GL_TEXTURE_2D:
1955    case GL_TEXTURE_3D:
1956    case GL_TEXTURE_CUBE_MAP:
1957       /* OK, legal value */
1958       break;
1959    default:
1960       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
1961       return;
1962    }
1963
1964    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1965    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1966
1967    _mesa_lock_texture(ctx, texObj);
1968    if (target == GL_TEXTURE_CUBE_MAP) {
1969       GLuint face;
1970       for (face = 0; face < 6; face++)
1971          ctx->Driver.GenerateMipmap(ctx,
1972                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
1973                                     texObj);
1974    }
1975    else {
1976       ctx->Driver.GenerateMipmap(ctx, target, texObj);
1977    }
1978    _mesa_unlock_texture(ctx, texObj);
1979 }
1980
1981
1982 #if FEATURE_EXT_framebuffer_blit
1983 /**
1984  * Blit rectangular region, optionally from one framebuffer to another.
1985  *
1986  * Note, if the src buffer is multisampled and the dest is not, this is
1987  * when the samples must be resolved to a single color.
1988  */
1989 void GLAPIENTRY
1990 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1991                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1992                          GLbitfield mask, GLenum filter)
1993 {
1994    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
1995                                      GL_DEPTH_BUFFER_BIT |
1996                                      GL_STENCIL_BUFFER_BIT);
1997    const struct gl_framebuffer *readFb, *drawFb;
1998    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
1999    GET_CURRENT_CONTEXT(ctx);
2000
2001    ASSERT_OUTSIDE_BEGIN_END(ctx);
2002    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2003
2004    if (ctx->NewState) {
2005       _mesa_update_state(ctx);
2006    }
2007
2008    readFb = ctx->ReadBuffer;
2009    drawFb = ctx->DrawBuffer;
2010
2011    if (!readFb || !drawFb) {
2012       /* This will normally never happen but someday we may want to
2013        * support MakeCurrent() with no drawables.
2014        */
2015       return;
2016    }
2017
2018    /* check for complete framebuffers */
2019    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2020        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2021       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2022                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2023       return;
2024    }
2025
2026    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2027       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2028       return;
2029    }
2030
2031    if (mask & ~legalMaskBits) {
2032       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2033       return;
2034    }
2035
2036    /* depth/stencil must be blitted with nearest filtering */
2037    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2038         && filter != GL_NEAREST) {
2039       _mesa_error(ctx, GL_INVALID_OPERATION,
2040              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2041       return;
2042    }
2043
2044    /* get color read/draw renderbuffers */
2045    if (mask & GL_COLOR_BUFFER_BIT) {
2046       colorReadRb = readFb->_ColorReadBuffer;
2047       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2048    }
2049    else {
2050       colorReadRb = colorDrawRb = NULL;
2051    }
2052
2053    if (mask & GL_STENCIL_BUFFER_BIT) {
2054       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2055       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2056       if (!readRb ||
2057           !drawRb ||
2058           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2059           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2060          _mesa_error(ctx, GL_INVALID_OPERATION,
2061                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2062          return;
2063       }
2064    }
2065
2066    if (mask & GL_DEPTH_BUFFER_BIT) {
2067       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2068       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2069       if (!readRb ||
2070           !drawRb ||
2071           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2072           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2073          _mesa_error(ctx, GL_INVALID_OPERATION,
2074                      "glBlitFramebufferEXT(depth buffer size mismatch");
2075          return;
2076       }
2077    }
2078
2079    if (readFb->Visual.samples > 0 &&
2080        drawFb->Visual.samples > 0 &&
2081        readFb->Visual.samples != drawFb->Visual.samples) {
2082       _mesa_error(ctx, GL_INVALID_OPERATION,
2083                   "glBlitFramebufferEXT(mismatched samples");
2084       return;
2085    }
2086
2087    /* extra checks for multisample copies... */
2088    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2089       /* src and dest region sizes must be the same */
2090       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2091           srcY1 - srcY0 != dstY1 - dstY0) {
2092          _mesa_error(ctx, GL_INVALID_OPERATION,
2093                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2094          return;
2095       }
2096
2097       /* color formats must match */
2098       if (colorReadRb &&
2099           colorDrawRb &&
2100           colorReadRb->Format != colorDrawRb->Format) {
2101          _mesa_error(ctx, GL_INVALID_OPERATION,
2102                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2103          return;
2104       }
2105    }
2106
2107    if (!ctx->Extensions.EXT_framebuffer_blit) {
2108       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2109       return;
2110    }
2111
2112    ASSERT(ctx->Driver.BlitFramebuffer);
2113    ctx->Driver.BlitFramebuffer(ctx,
2114                                srcX0, srcY0, srcX1, srcY1,
2115                                dstX0, dstY0, dstX1, dstY1,
2116                                mask, filter);
2117 }
2118 #endif /* FEATURE_EXT_framebuffer_blit */