src/mesa/main/fbobject.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 1999-2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /*
  28  * GL_EXT/ARB_framebuffer_object extensions
  29  *
  30  * Authors:
  31  *   Brian Paul
  32  */
  33
  34
  35 #include "buffers.h"
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "fbobject.h"
  39 #include "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 #include "texstate.h"
  49
  50
  51 /** Set this to 1 to help debug FBO incompleteness problems */
  52 #define DEBUG_FBO 0
  53
  54
  55 /**
  56  * Notes:
  57  *
  58  * None of the GL_EXT_framebuffer_object functions are compiled into
  59  * display lists.
  60  */
  61
  62
  63
  64 /*
  65  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  66  * these placeholder objects into the hash table.
  67  * Later, when the object ID is first bound, we replace the placeholder
  68  * with the real frame/renderbuffer.
  69  */
  70 static struct gl_framebuffer DummyFramebuffer;
  71 static struct gl_renderbuffer DummyRenderbuffer;
  72
  73
  74 #define IS_CUBE_FACE(TARGET) \
  75    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  76     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  77
  78
  79 static void
  80 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  81 {
  82    /* no op */
  83 }
  84
  85 static void
  86 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  87 {
  88    /* no op */
  89 }
  90
  91
  92 void
  93 _mesa_init_fbobjects(GLcontext *ctx)
  94 {
  95    DummyFramebuffer.Delete = delete_dummy_framebuffer;
  96    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
  97 }
  98
  99
 100 /**
 101  * Helper routine for getting a gl_renderbuffer.
 102  */
 103 struct gl_renderbuffer *
 104 _mesa_lookup_renderbuffer(GLcontext *ctx, GLuint id)
 105 {
 106    struct gl_renderbuffer *rb;
 107
 108    if (id == 0)
 109       return NULL;
 110
 111    rb = (struct gl_renderbuffer *)
 112       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 113    return rb;
 114 }
 115
 116
 117 /**
 118  * Helper routine for getting a gl_framebuffer.
 119  */
 120 struct gl_framebuffer *
 121 _mesa_lookup_framebuffer(GLcontext *ctx, GLuint id)
 122 {
 123    struct gl_framebuffer *fb;
 124
 125    if (id == 0)
 126       return NULL;
 127
 128    fb = (struct gl_framebuffer *)
 129       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 130    return fb;
 131 }
 132
 133
 134 /**
 135  * Mark the given framebuffer as invalid.  This will force the
 136  * test for framebuffer completeness to be done before the framebuffer
 137  * is used.
 138  */
 139 static void
 140 invalidate_framebuffer(struct gl_framebuffer *fb)
 141 {
 142    fb->_Status = 0; /* "indeterminate" */
 143 }
 144
 145
 146 /**
 147  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 148  * gl_renderbuffer_attachment object.
 149  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 150  * the depth buffer attachment point.
 151  */
 152 struct gl_renderbuffer_attachment *
 153 _mesa_get_attachment(GLcontext *ctx, struct gl_framebuffer *fb,
 154                      GLenum attachment)
 155 {
 156    GLuint i;
 157
 158    switch (attachment) {
 159    case GL_COLOR_ATTACHMENT0_EXT:
 160    case GL_COLOR_ATTACHMENT1_EXT:
 161    case GL_COLOR_ATTACHMENT2_EXT:
 162    case GL_COLOR_ATTACHMENT3_EXT:
 163    case GL_COLOR_ATTACHMENT4_EXT:
 164    case GL_COLOR_ATTACHMENT5_EXT:
 165    case GL_COLOR_ATTACHMENT6_EXT:
 166    case GL_COLOR_ATTACHMENT7_EXT:
 167    case GL_COLOR_ATTACHMENT8_EXT:
 168    case GL_COLOR_ATTACHMENT9_EXT:
 169    case GL_COLOR_ATTACHMENT10_EXT:
 170    case GL_COLOR_ATTACHMENT11_EXT:
 171    case GL_COLOR_ATTACHMENT12_EXT:
 172    case GL_COLOR_ATTACHMENT13_EXT:
 173    case GL_COLOR_ATTACHMENT14_EXT:
 174    case GL_COLOR_ATTACHMENT15_EXT:
 175       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 176       if (i >= ctx->Const.MaxColorAttachments) {
 177          return NULL;
 178       }
 179       return &fb->Attachment[BUFFER_COLOR0 + i];
 180    case GL_DEPTH_STENCIL_ATTACHMENT:
 181       /* fall-through */
 182    case GL_DEPTH_ATTACHMENT_EXT:
 183       return &fb->Attachment[BUFFER_DEPTH];
 184    case GL_STENCIL_ATTACHMENT_EXT:
 185       return &fb->Attachment[BUFFER_STENCIL];
 186    default:
 187       return NULL;
 188    }
 189 }
 190
 191
 192 /**
 193  * Remove any texture or renderbuffer attached to the given attachment
 194  * point.  Update reference counts, etc.
 195  */
 196 void
 197 _mesa_remove_attachment(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
 198 {
 199    if (att->Type == GL_TEXTURE) {
 200       ASSERT(att->Texture);
 201       if (ctx->Driver.FinishRenderTexture) {
 202          /* tell driver that we're done rendering to this texture. */
 203          ctx->Driver.FinishRenderTexture(ctx, att);
 204       }
 205       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 206       ASSERT(!att->Texture);
 207    }
 208    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 209       ASSERT(!att->Texture);
 210       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 211       ASSERT(!att->Renderbuffer);
 212    }
 213    att->Type = GL_NONE;
 214    att->Complete = GL_TRUE;
 215 }
 216
 217
 218 /**
 219  * Bind a texture object to an attachment point.
 220  * The previous binding, if any, will be removed first.
 221  */
 222 void
 223 _mesa_set_texture_attachment(GLcontext *ctx,
 224                              struct gl_framebuffer *fb,
 225                              struct gl_renderbuffer_attachment *att,
 226                              struct gl_texture_object *texObj,
 227                              GLenum texTarget, GLuint level, GLuint zoffset)
 228 {
 229    if (att->Texture == texObj) {
 230       /* re-attaching same texture */
 231       ASSERT(att->Type == GL_TEXTURE);
 232    }
 233    else {
 234       /* new attachment */
 235       _mesa_remove_attachment(ctx, att);
 236       att->Type = GL_TEXTURE;
 237       assert(!att->Texture);
 238       _mesa_reference_texobj(&att->Texture, texObj);
 239    }
 240
 241    /* always update these fields */
 242    att->TextureLevel = level;
 243    if (IS_CUBE_FACE(texTarget)) {
 244       att->CubeMapFace = texTarget - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 245    }
 246    else {
 247       att->CubeMapFace = 0;
 248    }
 249    att->Zoffset = zoffset;
 250    att->Complete = GL_FALSE;
 251
 252    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 253       ctx->Driver.RenderTexture(ctx, fb, att);
 254    }
 255
 256    invalidate_framebuffer(fb);
 257 }
 258
 259
 260 /**
 261  * Bind a renderbuffer to an attachment point.
 262  * The previous binding, if any, will be removed first.
 263  */
 264 void
 265 _mesa_set_renderbuffer_attachment(GLcontext *ctx,
 266                                   struct gl_renderbuffer_attachment *att,
 267                                   struct gl_renderbuffer *rb)
 268 {
 269    /* XXX check if re-doing same attachment, exit early */
 270    _mesa_remove_attachment(ctx, att);
 271    att->Type = GL_RENDERBUFFER_EXT;
 272    att->Texture = NULL; /* just to be safe */
 273    att->Complete = GL_FALSE;
 274    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 275 }
 276
 277
 278 /**
 279  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 280  * Attach a renderbuffer object to a framebuffer object.
 281  */
 282 void
 283 _mesa_framebuffer_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
 284                                GLenum attachment, struct gl_renderbuffer *rb)
 285 {
 286    struct gl_renderbuffer_attachment *att;
 287
 288    _glthread_LOCK_MUTEX(fb->Mutex);
 289
 290    att = _mesa_get_attachment(ctx, fb, attachment);
 291    ASSERT(att);
 292    if (rb) {
 293       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 294       if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
 295          /* do stencil attachment here (depth already done above) */
 296          att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
 297          assert(att);
 298          _mesa_set_renderbuffer_attachment(ctx, att, rb);
 299       }
 300    }
 301    else {
 302       _mesa_remove_attachment(ctx, att);
 303    }
 304
 305    invalidate_framebuffer(fb);
 306
 307    _glthread_UNLOCK_MUTEX(fb->Mutex);
 308 }
 309
 310
 311 /**
 312  * For debug only.
 313  */
 314 static void
 315 att_incomplete(const char *msg)
 316 {
 317 #if DEBUG_FBO
 318    _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
 319 #else
 320    (void) msg;
 321 #endif
 322 }
 323
 324
 325 /**
 326  * For debug only.
 327  */
 328 static void
 329 fbo_incomplete(const char *msg, int index)
 330 {
 331 #if DEBUG_FBO
 332    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 333 #else
 334    (void) msg;
 335    (void) index;
 336 #endif
 337 }
 338
 339
 340
 341
 342 /**
 343  * Test if an attachment point is complete and update its Complete field.
 344  * \param format if GL_COLOR, this is a color attachment point,
 345  *               if GL_DEPTH, this is a depth component attachment point,
 346  *               if GL_STENCIL, this is a stencil component attachment point.
 347  */
 348 static void
 349 test_attachment_completeness(const GLcontext *ctx, GLenum format,
 350                              struct gl_renderbuffer_attachment *att)
 351 {
 352    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 353
 354    /* assume complete */
 355    att->Complete = GL_TRUE;
 356
 357    /* Look for reasons why the attachment might be incomplete */
 358    if (att->Type == GL_TEXTURE) {
 359       const struct gl_texture_object *texObj = att->Texture;
 360       struct gl_texture_image *texImage;
 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       if (format == GL_COLOR) {
 388          if (texImage->TexFormat->BaseFormat != GL_RGB &&
 389              texImage->TexFormat->BaseFormat != GL_RGBA) {
 390             att_incomplete("bad format");
 391             att->Complete = GL_FALSE;
 392             return;
 393          }
 394          if (texImage->TexFormat->TexelBytes == 0) {
 395             att_incomplete("compressed internalformat");
 396             att->Complete = GL_FALSE;
 397             return;
 398          }
 399       }
 400       else if (format == GL_DEPTH) {
 401          if (texImage->TexFormat->BaseFormat == GL_DEPTH_COMPONENT) {
 402             /* OK */
 403          }
 404          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 405                   ctx->Extensions.ARB_depth_texture &&
 406                   texImage->TexFormat->BaseFormat == GL_DEPTH_STENCIL_EXT) {
 407             /* OK */
 408          }
 409          else {
 410             att->Complete = GL_FALSE;
 411             att_incomplete("bad depth format");
 412             return;
 413          }
 414       }
 415       else {
 416          ASSERT(format == GL_STENCIL);
 417          ASSERT(att->Renderbuffer->StencilBits);
 418          if (ctx->Extensions.EXT_packed_depth_stencil &&
 419              ctx->Extensions.ARB_depth_texture &&
 420              att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
 421             /* OK */
 422          }
 423          else {
 424             /* no such thing as stencil-only textures */
 425             att_incomplete("illegal stencil texture");
 426             att->Complete = GL_FALSE;
 427             return;
 428          }
 429       }
 430    }
 431    else if (att->Type == GL_RENDERBUFFER_EXT) {
 432       ASSERT(att->Renderbuffer);
 433       if (!att->Renderbuffer->InternalFormat ||
 434           att->Renderbuffer->Width < 1 ||
 435           att->Renderbuffer->Height < 1) {
 436          att_incomplete("0x0 renderbuffer");
 437          att->Complete = GL_FALSE;
 438          return;
 439       }
 440       if (format == GL_COLOR) {
 441          if (att->Renderbuffer->_BaseFormat != GL_RGB &&
 442              att->Renderbuffer->_BaseFormat != GL_RGBA) {
 443             att_incomplete("bad renderbuffer color format");
 444             att->Complete = GL_FALSE;
 445             return;
 446          }
 447          ASSERT(att->Renderbuffer->RedBits);
 448          ASSERT(att->Renderbuffer->GreenBits);
 449          ASSERT(att->Renderbuffer->BlueBits);
 450       }
 451       else if (format == GL_DEPTH) {
 452          if (att->Renderbuffer->_BaseFormat == GL_DEPTH_COMPONENT) {
 453             ASSERT(att->Renderbuffer->DepthBits);
 454             /* OK */
 455          }
 456          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 457                   att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
 458             ASSERT(att->Renderbuffer->DepthBits);
 459             /* OK */
 460          }
 461          else {
 462             att_incomplete("bad renderbuffer depth format");
 463             att->Complete = GL_FALSE;
 464             return;
 465          }
 466       }
 467       else {
 468          assert(format == GL_STENCIL);
 469          if (att->Renderbuffer->_BaseFormat == GL_STENCIL_INDEX) {
 470             ASSERT(att->Renderbuffer->StencilBits);
 471             /* OK */
 472          }
 473          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 474                   att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
 475             ASSERT(att->Renderbuffer->StencilBits);
 476             /* OK */
 477          }
 478          else {
 479             att->Complete = GL_FALSE;
 480             att_incomplete("bad renderbuffer stencil format");
 481             return;
 482          }
 483       }
 484    }
 485    else {
 486       ASSERT(att->Type == GL_NONE);
 487       /* complete */
 488       return;
 489    }
 490 }
 491
 492
 493 /**
 494  * Test if the given framebuffer object is complete and update its
 495  * Status field with the results.
 496  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 497  * driver to make hardware-specific validation/completeness checks.
 498  * Also update the framebuffer's Width and Height fields if the
 499  * framebuffer is complete.
 500  */
 501 void
 502 _mesa_test_framebuffer_completeness(GLcontext *ctx, struct gl_framebuffer *fb)
 503 {
 504    GLuint numImages;
 505    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 506    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 507    GLint numSamples = -1;
 508    GLint i;
 509    GLuint j;
 510
 511    assert(fb->Name != 0);
 512
 513    numImages = 0;
 514    fb->Width = 0;
 515    fb->Height = 0;
 516
 517    /* Start at -2 to more easily loop over all attachment points.
 518     *  -2: depth buffer
 519     *  -1: stencil buffer
 520     * >=0: color buffer
 521     */
 522    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 523       struct gl_renderbuffer_attachment *att;
 524       GLenum f;
 525
 526       /*
 527        * XXX for ARB_fbo, only check color buffers that are named by
 528        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 529        */
 530
 531       /* check for attachment completeness
 532        */
 533       if (i == -2) {
 534          att = &fb->Attachment[BUFFER_DEPTH];
 535          test_attachment_completeness(ctx, GL_DEPTH, att);
 536          if (!att->Complete) {
 537             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 538             fbo_incomplete("depth attachment incomplete", -1);
 539             return;
 540          }
 541       }
 542       else if (i == -1) {
 543          att = &fb->Attachment[BUFFER_STENCIL];
 544          test_attachment_completeness(ctx, GL_STENCIL, att);
 545          if (!att->Complete) {
 546             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 547             fbo_incomplete("stencil attachment incomplete", -1);
 548             return;
 549          }
 550       }
 551       else {
 552          att = &fb->Attachment[BUFFER_COLOR0 + i];
 553          test_attachment_completeness(ctx, GL_COLOR, att);
 554          if (!att->Complete) {
 555             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 556             fbo_incomplete("color attachment incomplete", i);
 557             return;
 558          }
 559       }
 560
 561       /* get width, height, format of the renderbuffer/texture
 562        */
 563       if (att->Type == GL_TEXTURE) {
 564          const struct gl_texture_image *texImg
 565             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 566          minWidth = MIN2(minWidth, texImg->Width);
 567          maxWidth = MAX2(maxWidth, texImg->Width);
 568          minHeight = MIN2(minHeight, texImg->Height);
 569          maxHeight = MAX2(maxHeight, texImg->Height);
 570          f = texImg->_BaseFormat;
 571          numImages++;
 572          if (f != GL_RGB && f != GL_RGBA && f != GL_DEPTH_COMPONENT
 573              && f != GL_DEPTH_STENCIL_EXT) {
 574             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 575             fbo_incomplete("texture attachment incomplete", -1);
 576             return;
 577          }
 578       }
 579       else if (att->Type == GL_RENDERBUFFER_EXT) {
 580          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 581          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 582          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 583          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 584          f = att->Renderbuffer->InternalFormat;
 585          numImages++;
 586       }
 587       else {
 588          assert(att->Type == GL_NONE);
 589          continue;
 590       }
 591
 592       if (numSamples < 0) {
 593          /* first buffer */
 594          numSamples = att->Renderbuffer->NumSamples;
 595       }
 596
 597       /* Error-check width, height, format, samples
 598        */
 599       if (numImages == 1) {
 600          /* save format, num samples */
 601          if (i >= 0) {
 602             intFormat = f;
 603          }
 604       }
 605       else {
 606          if (!ctx->Extensions.ARB_framebuffer_object) {
 607             /* check that width, height, format are same */
 608             if (minWidth != maxWidth || minHeight != maxHeight) {
 609                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 610                fbo_incomplete("width or height mismatch", -1);
 611                return;
 612             }
 613             /* check that all color buffer have same format */
 614             if (intFormat != GL_NONE && f != intFormat) {
 615                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 616                fbo_incomplete("format mismatch", -1);
 617                return;
 618             }
 619          }
 620          if (att->Renderbuffer &&
 621              att->Renderbuffer->NumSamples != numSamples) {
 622             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 623             fbo_incomplete("inconsistant number of samples", i);
 624             return;
 625          }
 626
 627       }
 628    }
 629
 630 #ifndef FEATURE_OES_framebuffer_object
 631    /* Check that all DrawBuffers are present */
 632    for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 633       if (fb->ColorDrawBuffer[j] != GL_NONE) {
 634          const struct gl_renderbuffer_attachment *att
 635             = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 636          assert(att);
 637          if (att->Type == GL_NONE) {
 638             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 639             fbo_incomplete("missing drawbuffer", j);
 640             return;
 641          }
 642       }
 643    }
 644
 645    /* Check that the ReadBuffer is present */
 646    if (fb->ColorReadBuffer != GL_NONE) {
 647       const struct gl_renderbuffer_attachment *att
 648          = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 649       assert(att);
 650       if (att->Type == GL_NONE) {
 651          fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 652             fbo_incomplete("missing readbuffer", -1);
 653          return;
 654       }
 655    }
 656 #endif
 657
 658    if (numImages == 0) {
 659       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 660       fbo_incomplete("no attachments", -1);
 661       return;
 662    }
 663
 664    /* Provisionally set status = COMPLETE ... */
 665    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 666
 667    /* ... but the driver may say the FB is incomplete.
 668     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 669     * if anything.
 670     */
 671    if (ctx->Driver.ValidateFramebuffer) {
 672       ctx->Driver.ValidateFramebuffer(ctx, fb);
 673       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 674          fbo_incomplete("driver marked FBO as incomplete", -1);
 675       }
 676    }
 677
 678    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 679       /*
 680        * Note that if ARB_framebuffer_object is supported and the attached
 681        * renderbuffers/textures are different sizes, the framebuffer
 682        * width/height will be set to the smallest width/height.
 683        */
 684       fb->Width = minWidth;
 685       fb->Height = minHeight;
 686
 687       /* finally, update the visual info for the framebuffer */
 688       _mesa_update_framebuffer_visual(fb);
 689    }
 690 }
 691
 692
 693 GLboolean GLAPIENTRY
 694 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 695 {
 696    GET_CURRENT_CONTEXT(ctx);
 697    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 698    if (renderbuffer) {
 699       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 700       if (rb != NULL && rb != &DummyRenderbuffer)
 701          return GL_TRUE;
 702    }
 703    return GL_FALSE;
 704 }
 705
 706
 707 void GLAPIENTRY
 708 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 709 {
 710    struct gl_renderbuffer *newRb;
 711    GET_CURRENT_CONTEXT(ctx);
 712
 713    ASSERT_OUTSIDE_BEGIN_END(ctx);
 714
 715    if (target != GL_RENDERBUFFER_EXT) {
 716          _mesa_error(ctx, GL_INVALID_ENUM,
 717                   "glBindRenderbufferEXT(target)");
 718       return;
 719    }
 720
 721    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
 722
 723    if (renderbuffer) {
 724       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 725       if (newRb == &DummyRenderbuffer) {
 726          /* ID was reserved, but no real renderbuffer object made yet */
 727          newRb = NULL;
 728       }
 729       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 730          /* All RB IDs must be Gen'd */
 731          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 732          return;
 733       }
 734
 735       if (!newRb) {
 736          /* create new renderbuffer object */
 737          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 738          if (!newRb) {
 739             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 740             return;
 741          }
 742          ASSERT(newRb->AllocStorage);
 743          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 744          newRb->RefCount = 1; /* referenced by hash table */
 745       }
 746    }
 747    else {
 748       newRb = NULL;
 749    }
 750
 751    ASSERT(newRb != &DummyRenderbuffer);
 752
 753    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 754 }
 755
 756
 757 /**
 758  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 759  * the renderbuffer.
 760  * This is used when a renderbuffer object is deleted.
 761  * The spec calls for unbinding.
 762  */
 763 static void
 764 detach_renderbuffer(GLcontext *ctx,
 765                     struct gl_framebuffer *fb,
 766                     struct gl_renderbuffer *rb)
 767 {
 768    GLuint i;
 769    for (i = 0; i < BUFFER_COUNT; i++) {
 770       if (fb->Attachment[i].Renderbuffer == rb) {
 771          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 772       }
 773    }
 774    invalidate_framebuffer(fb);
 775 }
 776
 777
 778 void GLAPIENTRY
 779 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 780 {
 781    GLint i;
 782    GET_CURRENT_CONTEXT(ctx);
 783
 784    ASSERT_OUTSIDE_BEGIN_END(ctx);
 785    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 786
 787    for (i = 0; i < n; i++) {
 788       if (renderbuffers[i] > 0) {
 789          struct gl_renderbuffer *rb;
 790          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 791          if (rb) {
 792             /* check if deleting currently bound renderbuffer object */
 793             if (rb == ctx->CurrentRenderbuffer) {
 794                /* bind default */
 795                ASSERT(rb->RefCount >= 2);
 796                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 797             }
 798
 799             if (ctx->DrawBuffer->Name) {
 800                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 801             }
 802             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 803                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 804             }
 805
 806             /* Remove from hash table immediately, to free the ID.
 807              * But the object will not be freed until it's no longer
 808              * referenced anywhere else.
 809              */
 810             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 811
 812             if (rb != &DummyRenderbuffer) {
 813                /* no longer referenced by hash table */
 814                _mesa_reference_renderbuffer(&rb, NULL);
 815             }
 816          }
 817       }
 818    }
 819 }
 820
 821
 822 void GLAPIENTRY
 823 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 824 {
 825    GET_CURRENT_CONTEXT(ctx);
 826    GLuint first;
 827    GLint i;
 828
 829    ASSERT_OUTSIDE_BEGIN_END(ctx);
 830
 831    if (n < 0) {
 832       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 833       return;
 834    }
 835
 836    if (!renderbuffers)
 837       return;
 838
 839    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 840
 841    for (i = 0; i < n; i++) {
 842       GLuint name = first + i;
 843       renderbuffers[i] = name;
 844       /* insert dummy placeholder into hash table */
 845       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 846       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 847       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 848    }
 849 }
 850
 851
 852 /**
 853  * Given an internal format token for a render buffer, return the
 854  * corresponding base format.
 855  * This is very similar to _mesa_base_tex_format() but the set of valid
 856  * internal formats is somewhat different.
 857  *
 858  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 859  *  GL_DEPTH_STENCIL_EXT or zero if error.
 860  */
 861 GLenum
 862 _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
 863 {
 864    switch (internalFormat) {
 865    case GL_RGB:
 866    case GL_R3_G3_B2:
 867    case GL_RGB4:
 868    case GL_RGB5:
 869    case GL_RGB8:
 870    case GL_RGB10:
 871    case GL_RGB12:
 872    case GL_RGB16:
 873       return GL_RGB;
 874    case GL_RGBA:
 875    case GL_RGBA2:
 876    case GL_RGBA4:
 877    case GL_RGB5_A1:
 878    case GL_RGBA8:
 879    case GL_RGB10_A2:
 880    case GL_RGBA12:
 881    case GL_RGBA16:
 882       return GL_RGBA;
 883    case GL_STENCIL_INDEX:
 884    case GL_STENCIL_INDEX1_EXT:
 885    case GL_STENCIL_INDEX4_EXT:
 886    case GL_STENCIL_INDEX8_EXT:
 887    case GL_STENCIL_INDEX16_EXT:
 888       return GL_STENCIL_INDEX;
 889    case GL_DEPTH_COMPONENT:
 890    case GL_DEPTH_COMPONENT16:
 891    case GL_DEPTH_COMPONENT24:
 892    case GL_DEPTH_COMPONENT32:
 893       return GL_DEPTH_COMPONENT;
 894    case GL_DEPTH_STENCIL_EXT:
 895    case GL_DEPTH24_STENCIL8_EXT:
 896       if (ctx->Extensions.EXT_packed_depth_stencil)
 897          return GL_DEPTH_STENCIL_EXT;
 898       else
 899          return 0;
 900    /* XXX add floating point formats eventually */
 901    default:
 902       return 0;
 903    }
 904 }
 905
 906
 907 /** sentinal value, see below */
 908 #define NO_SAMPLES 1000
 909
 910
 911 /**
 912  * Helper function used by _mesa_RenderbufferStorageEXT() and
 913  * _mesa_RenderbufferStorageMultisample().
 914  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
 915  */
 916 static void
 917 renderbuffer_storage(GLenum target, GLenum internalFormat,
 918                      GLsizei width, GLsizei height, GLsizei samples)
 919 {
 920    const char *func = samples == NO_SAMPLES ?
 921       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
 922    struct gl_renderbuffer *rb;
 923    GLenum baseFormat;
 924    GET_CURRENT_CONTEXT(ctx);
 925
 926    ASSERT_OUTSIDE_BEGIN_END(ctx);
 927
 928    if (target != GL_RENDERBUFFER_EXT) {
 929       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
 930       return;
 931    }
 932
 933    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 934    if (baseFormat == 0) {
 935       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
 936       return;
 937    }
 938
 939    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 940       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
 941       return;
 942    }
 943
 944    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 945       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
 946       return;
 947    }
 948
 949    if (samples == NO_SAMPLES) {
 950       /* NumSamples == 0 indicates non-multisampling */
 951       samples = 0;
 952    }
 953    else if (samples > ctx->Const.MaxSamples) {
 954       /* note: driver may choose to use more samples than what's requested */
 955       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
 956       return;
 957    }
 958
 959    rb = ctx->CurrentRenderbuffer;
 960    if (!rb) {
 961       _mesa_error(ctx, GL_INVALID_OPERATION, func);
 962       return;
 963    }
 964
 965    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 966
 967    if (rb->InternalFormat == internalFormat &&
 968        rb->Width == (GLuint) width &&
 969        rb->Height == (GLuint) height) {
 970       /* no change in allocation needed */
 971       return;
 972    }
 973
 974    /* These MUST get set by the AllocStorage func */
 975    rb->_ActualFormat = 0;
 976    rb->RedBits =
 977    rb->GreenBits =
 978    rb->BlueBits =
 979    rb->AlphaBits =
 980    rb->IndexBits =
 981    rb->DepthBits =
 982    rb->StencilBits = 0;
 983    rb->NumSamples = samples;
 984
 985    /* Now allocate the storage */
 986    ASSERT(rb->AllocStorage);
 987    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
 988       /* No error - check/set fields now */
 989       assert(rb->_ActualFormat);
 990       assert(rb->Width == (GLuint) width);
 991       assert(rb->Height == (GLuint) height);
 992       assert(rb->RedBits || rb->GreenBits || rb->BlueBits || rb->AlphaBits ||
 993              rb->DepthBits || rb->StencilBits || rb->IndexBits);
 994       rb->InternalFormat = internalFormat;
 995       rb->_BaseFormat = baseFormat;
 996    }
 997    else {
 998       /* Probably ran out of memory - clear the fields */
 999       rb->Width = 0;
1000       rb->Height = 0;
1001       rb->InternalFormat = GL_NONE;
1002       rb->_ActualFormat = GL_NONE;
1003       rb->_BaseFormat = GL_NONE;
1004       rb->RedBits =
1005       rb->GreenBits =
1006       rb->BlueBits =
1007       rb->AlphaBits =
1008       rb->IndexBits =
1009       rb->DepthBits =
1010       rb->StencilBits =
1011       rb->NumSamples = 0;
1012    }
1013
1014    /*
1015    test_framebuffer_completeness(ctx, fb);
1016    */
1017    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1018     * points???
1019     */
1020 }
1021
1022
1023 void GLAPIENTRY
1024 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1025                              GLsizei width, GLsizei height)
1026 {
1027    /* GL_ARB_fbo says calling this function is equivalent to calling
1028     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1029     * a token value here just for error reporting purposes.
1030     */
1031    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1032 }
1033
1034
1035 void GLAPIENTRY
1036 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1037                                      GLenum internalFormat,
1038                                      GLsizei width, GLsizei height)
1039 {
1040    renderbuffer_storage(target, internalFormat, width, height, samples);
1041 }
1042
1043
1044
1045 void GLAPIENTRY
1046 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1047 {
1048    struct gl_renderbuffer *rb;
1049    GET_CURRENT_CONTEXT(ctx);
1050
1051    ASSERT_OUTSIDE_BEGIN_END(ctx);
1052
1053    if (target != GL_RENDERBUFFER_EXT) {
1054       _mesa_error(ctx, GL_INVALID_ENUM,
1055                   "glGetRenderbufferParameterivEXT(target)");
1056       return;
1057    }
1058
1059    rb = ctx->CurrentRenderbuffer;
1060    if (!rb) {
1061       _mesa_error(ctx, GL_INVALID_OPERATION,
1062                   "glGetRenderbufferParameterivEXT");
1063       return;
1064    }
1065
1066    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1067
1068    switch (pname) {
1069    case GL_RENDERBUFFER_WIDTH_EXT:
1070       *params = rb->Width;
1071       return;
1072    case GL_RENDERBUFFER_HEIGHT_EXT:
1073       *params = rb->Height;
1074       return;
1075    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1076       *params = rb->InternalFormat;
1077       return;
1078    case GL_RENDERBUFFER_RED_SIZE_EXT:
1079       *params = rb->RedBits;
1080       break;
1081    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1082       *params = rb->GreenBits;
1083       break;
1084    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1085       *params = rb->BlueBits;
1086       break;
1087    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1088       *params = rb->AlphaBits;
1089       break;
1090    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1091       *params = rb->DepthBits;
1092       break;
1093    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1094       *params = rb->StencilBits;
1095       break;
1096    case GL_RENDERBUFFER_SAMPLES:
1097       if (ctx->Extensions.ARB_framebuffer_object) {
1098          *params = rb->NumSamples;
1099          break;
1100       }
1101       /* fallthrough */
1102    default:
1103       _mesa_error(ctx, GL_INVALID_ENUM,
1104                   "glGetRenderbufferParameterivEXT(target)");
1105       return;
1106    }
1107 }
1108
1109
1110 GLboolean GLAPIENTRY
1111 _mesa_IsFramebufferEXT(GLuint framebuffer)
1112 {
1113    GET_CURRENT_CONTEXT(ctx);
1114    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1115    if (framebuffer) {
1116       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1117       if (rb != NULL && rb != &DummyFramebuffer)
1118          return GL_TRUE;
1119    }
1120    return GL_FALSE;
1121 }
1122
1123
1124 static void
1125 check_begin_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1126 {
1127    GLuint i;
1128    ASSERT(ctx->Driver.RenderTexture);
1129    for (i = 0; i < BUFFER_COUNT; i++) {
1130       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1131       struct gl_texture_object *texObj = att->Texture;
1132       if (texObj
1133           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1134          ctx->Driver.RenderTexture(ctx, fb, att);
1135       }
1136    }
1137 }
1138
1139
1140 /**
1141  * Examine all the framebuffer's attachments to see if any are textures.
1142  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1143  * notify the device driver that the texture image may have changed.
1144  */
1145 static void
1146 check_end_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1147 {
1148    if (ctx->Driver.FinishRenderTexture) {
1149       GLuint i;
1150       for (i = 0; i < BUFFER_COUNT; i++) {
1151          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1152          if (att->Texture && att->Renderbuffer) {
1153             ctx->Driver.FinishRenderTexture(ctx, att);
1154          }
1155       }
1156    }
1157 }
1158
1159
1160 void GLAPIENTRY
1161 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1162 {
1163    struct gl_framebuffer *newFb, *newFbread;
1164    GLboolean bindReadBuf, bindDrawBuf;
1165    GET_CURRENT_CONTEXT(ctx);
1166
1167 #ifdef DEBUG
1168    if (ctx->Extensions.ARB_framebuffer_object) {
1169       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1170       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1171    }
1172 #endif
1173
1174    ASSERT_OUTSIDE_BEGIN_END(ctx);
1175
1176    if (!ctx->Extensions.EXT_framebuffer_object) {
1177       _mesa_error(ctx, GL_INVALID_OPERATION,
1178                   "glBindFramebufferEXT(unsupported)");
1179       return;
1180    }
1181
1182    switch (target) {
1183 #if FEATURE_EXT_framebuffer_blit
1184    case GL_DRAW_FRAMEBUFFER_EXT:
1185       if (!ctx->Extensions.EXT_framebuffer_blit) {
1186          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1187          return;
1188       }
1189       bindDrawBuf = GL_TRUE;
1190       bindReadBuf = GL_FALSE;
1191       break;
1192    case GL_READ_FRAMEBUFFER_EXT:
1193       if (!ctx->Extensions.EXT_framebuffer_blit) {
1194          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1195          return;
1196       }
1197       bindDrawBuf = GL_FALSE;
1198       bindReadBuf = GL_TRUE;
1199       break;
1200 #endif
1201    case GL_FRAMEBUFFER_EXT:
1202       bindDrawBuf = GL_TRUE;
1203       bindReadBuf = GL_TRUE;
1204       break;
1205    default:
1206       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1207       return;
1208    }
1209
1210    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1211
1212    if (framebuffer) {
1213       /* Binding a user-created framebuffer object */
1214       newFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1215       if (newFb == &DummyFramebuffer) {
1216          /* ID was reserved, but no real framebuffer object made yet */
1217          newFb = NULL;
1218       }
1219       else if (!newFb && ctx->Extensions.ARB_framebuffer_object) {
1220          /* All FBO IDs must be Gen'd */
1221          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1222          return;
1223       }
1224
1225       if (!newFb) {
1226          /* create new framebuffer object */
1227          newFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1228          if (!newFb) {
1229             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1230             return;
1231          }
1232          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
1233       }
1234       newFbread = newFb;
1235    }
1236    else {
1237       /* Binding the window system framebuffer (which was originally set
1238        * with MakeCurrent).
1239        */
1240       newFb = ctx->WinSysDrawBuffer;
1241       newFbread = ctx->WinSysReadBuffer;
1242    }
1243
1244    ASSERT(newFb);
1245    ASSERT(newFb != &DummyFramebuffer);
1246
1247    /*
1248     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1249     */
1250
1251    if (bindReadBuf) {
1252       if (ctx->ReadBuffer == newFbread)
1253          bindReadBuf = GL_FALSE; /* no change */
1254       else
1255          _mesa_reference_framebuffer(&ctx->ReadBuffer, newFbread);
1256    }
1257
1258    if (bindDrawBuf) {
1259       /* check if old FB had any texture attachments */
1260       if (ctx->DrawBuffer->Name != 0) {
1261          check_end_texture_render(ctx, ctx->DrawBuffer);
1262       }
1263
1264       if (ctx->DrawBuffer == newFb)
1265          bindDrawBuf = GL_FALSE; /* no change */
1266       else
1267          _mesa_reference_framebuffer(&ctx->DrawBuffer, newFb);
1268
1269       if (newFb->Name != 0) {
1270          /* check if newly bound framebuffer has any texture attachments */
1271          check_begin_texture_render(ctx, newFb);
1272       }
1273    }
1274
1275    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1276       ctx->Driver.BindFramebuffer(ctx, target, newFb, newFbread);
1277    }
1278 }
1279
1280
1281 void GLAPIENTRY
1282 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1283 {
1284    GLint i;
1285    GET_CURRENT_CONTEXT(ctx);
1286
1287    ASSERT_OUTSIDE_BEGIN_END(ctx);
1288    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1289
1290    for (i = 0; i < n; i++) {
1291       if (framebuffers[i] > 0) {
1292          struct gl_framebuffer *fb;
1293          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1294          if (fb) {
1295             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1296
1297             /* check if deleting currently bound framebuffer object */
1298             if (fb == ctx->DrawBuffer) {
1299                /* bind default */
1300                ASSERT(fb->RefCount >= 2);
1301                _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1302             }
1303             if (fb == ctx->ReadBuffer) {
1304                /* bind default */
1305                ASSERT(fb->RefCount >= 2);
1306                _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1307             }
1308
1309             /* remove from hash table immediately, to free the ID */
1310             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1311
1312             if (fb != &DummyFramebuffer) {
1313                /* But the object will not be freed until it's no longer
1314                 * bound in any context.
1315                 */
1316                _mesa_reference_framebuffer(&fb, NULL);
1317             }
1318          }
1319       }
1320    }
1321 }
1322
1323
1324 void GLAPIENTRY
1325 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1326 {
1327    GET_CURRENT_CONTEXT(ctx);
1328    GLuint first;
1329    GLint i;
1330
1331    ASSERT_OUTSIDE_BEGIN_END(ctx);
1332
1333    if (n < 0) {
1334       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1335       return;
1336    }
1337
1338    if (!framebuffers)
1339       return;
1340
1341    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1342
1343    for (i = 0; i < n; i++) {
1344       GLuint name = first + i;
1345       framebuffers[i] = name;
1346       /* insert dummy placeholder into hash table */
1347       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1348       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1349       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1350    }
1351 }
1352
1353
1354
1355 GLenum GLAPIENTRY
1356 _mesa_CheckFramebufferStatusEXT(GLenum target)
1357 {
1358    struct gl_framebuffer *buffer;
1359    GET_CURRENT_CONTEXT(ctx);
1360
1361    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1362
1363    switch (target) {
1364 #if FEATURE_EXT_framebuffer_blit
1365    case GL_DRAW_FRAMEBUFFER_EXT:
1366       if (!ctx->Extensions.EXT_framebuffer_blit) {
1367          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1368          return 0;
1369       }
1370       buffer = ctx->DrawBuffer;
1371       break;
1372    case GL_READ_FRAMEBUFFER_EXT:
1373       if (!ctx->Extensions.EXT_framebuffer_blit) {
1374          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1375          return 0;
1376       }
1377       buffer = ctx->ReadBuffer;
1378       break;
1379 #endif
1380    case GL_FRAMEBUFFER_EXT:
1381       buffer = ctx->DrawBuffer;
1382       break;
1383    default:
1384       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1385       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1386    }
1387
1388    if (buffer->Name == 0) {
1389       /* The window system / default framebuffer is always complete */
1390       return GL_FRAMEBUFFER_COMPLETE_EXT;
1391    }
1392
1393    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1394
1395    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1396       _mesa_test_framebuffer_completeness(ctx, buffer);
1397    }
1398
1399    return buffer->_Status;
1400 }
1401
1402
1403
1404 /**
1405  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1406  */
1407 static void
1408 framebuffer_texture(GLcontext *ctx, const char *caller, GLenum target,
1409                     GLenum attachment, GLenum textarget, GLuint texture,
1410                     GLint level, GLint zoffset)
1411 {
1412    struct gl_renderbuffer_attachment *att;
1413    struct gl_texture_object *texObj = NULL;
1414    struct gl_framebuffer *fb;
1415    GLboolean error = GL_FALSE;
1416
1417    ASSERT_OUTSIDE_BEGIN_END(ctx);
1418
1419    switch (target) {
1420    case GL_READ_FRAMEBUFFER_EXT:
1421       error = !ctx->Extensions.EXT_framebuffer_blit;
1422       fb = ctx->ReadBuffer;
1423       break;
1424    case GL_DRAW_FRAMEBUFFER_EXT:
1425       error = !ctx->Extensions.EXT_framebuffer_blit;
1426       /* fall-through */
1427    case GL_FRAMEBUFFER_EXT:
1428       fb = ctx->DrawBuffer;
1429       break;
1430    default:
1431       error = GL_TRUE;
1432    }
1433
1434    if (error) {
1435       _mesa_error(ctx, GL_INVALID_ENUM,
1436                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1437       return;
1438    }
1439
1440    ASSERT(fb);
1441
1442    /* check framebuffer binding */
1443    if (fb->Name == 0) {
1444       _mesa_error(ctx, GL_INVALID_OPERATION,
1445                   "glFramebufferTexture%sEXT", caller);
1446       return;
1447    }
1448
1449
1450    /* The textarget, level, and zoffset parameters are only validated if
1451     * texture is non-zero.
1452     */
1453    if (texture) {
1454       GLboolean err = GL_TRUE;
1455
1456       texObj = _mesa_lookup_texture(ctx, texture);
1457       if (texObj != NULL) {
1458          if (textarget == 0) {
1459             err = (texObj->Target != GL_TEXTURE_3D) &&
1460                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1461                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1462          }
1463          else {
1464             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1465                 ? !IS_CUBE_FACE(textarget)
1466                 : (texObj->Target != textarget);
1467          }
1468       }
1469
1470       if (err) {
1471          _mesa_error(ctx, GL_INVALID_OPERATION,
1472                      "glFramebufferTexture%sEXT(texture target mismatch)",
1473                      caller);
1474          return;
1475       }
1476
1477       if (texObj->Target == GL_TEXTURE_3D) {
1478          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1479          if (zoffset < 0 || zoffset >= maxSize) {
1480             _mesa_error(ctx, GL_INVALID_VALUE,
1481                         "glFramebufferTexture%sEXT(zoffset)", caller);
1482             return;
1483          }
1484       }
1485       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1486                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1487          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1488             _mesa_error(ctx, GL_INVALID_VALUE,
1489                         "glFramebufferTexture%sEXT(layer)", caller);
1490             return;
1491          }
1492       }
1493
1494       if ((level < 0) ||
1495           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1496          _mesa_error(ctx, GL_INVALID_VALUE,
1497                      "glFramebufferTexture%sEXT(level)", caller);
1498          return;
1499       }
1500    }
1501
1502    att = _mesa_get_attachment(ctx, fb, attachment);
1503    if (att == NULL) {
1504       _mesa_error(ctx, GL_INVALID_ENUM,
1505                   "glFramebufferTexture%sEXT(attachment)", caller);
1506       return;
1507    }
1508
1509    if (texObj && attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1510       /* the texture format must be depth+stencil */
1511       const struct gl_texture_image *texImg;
1512       texImg = texObj->Image[0][texObj->BaseLevel];
1513       if (!texImg || texImg->_BaseFormat != GL_DEPTH_STENCIL) {
1514          _mesa_error(ctx, GL_INVALID_OPERATION,
1515                      "glFramebufferTexture%sEXT(texture is not"
1516                      " DEPTH_STENCIL format)", caller);
1517          return;
1518       }
1519    }
1520
1521    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1522
1523    _glthread_LOCK_MUTEX(fb->Mutex);
1524    if (texObj) {
1525       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1526                                    level, zoffset);
1527       /* Set the render-to-texture flag.  We'll check this flag in
1528        * glTexImage() and friends to determine if we need to revalidate
1529        * any FBOs that might be rendering into this texture.
1530        * This flag never gets cleared since it's non-trivial to determine
1531        * when all FBOs might be done rendering to this texture.  That's OK
1532        * though since it's uncommon to render to a texture then repeatedly
1533        * call glTexImage() to change images in the texture.
1534        */
1535       texObj->_RenderToTexture = GL_TRUE;
1536    }
1537    else {
1538       _mesa_remove_attachment(ctx, att);
1539    }
1540
1541    invalidate_framebuffer(fb);
1542
1543    _glthread_UNLOCK_MUTEX(fb->Mutex);
1544 }
1545
1546
1547
1548 void GLAPIENTRY
1549 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1550                               GLenum textarget, GLuint texture, GLint level)
1551 {
1552    GET_CURRENT_CONTEXT(ctx);
1553
1554    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1555       _mesa_error(ctx, GL_INVALID_ENUM,
1556                   "glFramebufferTexture1DEXT(textarget)");
1557       return;
1558    }
1559
1560    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1561                        level, 0);
1562 }
1563
1564
1565 void GLAPIENTRY
1566 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1567                               GLenum textarget, GLuint texture, GLint level)
1568 {
1569    GET_CURRENT_CONTEXT(ctx);
1570
1571    if ((texture != 0) &&
1572        (textarget != GL_TEXTURE_2D) &&
1573        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1574        (!IS_CUBE_FACE(textarget))) {
1575       _mesa_error(ctx, GL_INVALID_OPERATION,
1576                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1577       return;
1578    }
1579
1580    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1581                        level, 0);
1582 }
1583
1584
1585 void GLAPIENTRY
1586 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1587                               GLenum textarget, GLuint texture,
1588                               GLint level, GLint zoffset)
1589 {
1590    GET_CURRENT_CONTEXT(ctx);
1591
1592    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1593       _mesa_error(ctx, GL_INVALID_ENUM,
1594                   "glFramebufferTexture3DEXT(textarget)");
1595       return;
1596    }
1597
1598    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1599                        level, zoffset);
1600 }
1601
1602
1603 void GLAPIENTRY
1604 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1605                                  GLuint texture, GLint level, GLint layer)
1606 {
1607    GET_CURRENT_CONTEXT(ctx);
1608
1609    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1610                        level, layer);
1611 }
1612
1613
1614 void GLAPIENTRY
1615 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1616                                  GLenum renderbufferTarget,
1617                                  GLuint renderbuffer)
1618 {
1619    struct gl_renderbuffer_attachment *att;
1620    struct gl_framebuffer *fb;
1621    struct gl_renderbuffer *rb;
1622    GET_CURRENT_CONTEXT(ctx);
1623
1624    ASSERT_OUTSIDE_BEGIN_END(ctx);
1625
1626    switch (target) {
1627 #if FEATURE_EXT_framebuffer_blit
1628    case GL_DRAW_FRAMEBUFFER_EXT:
1629       if (!ctx->Extensions.EXT_framebuffer_blit) {
1630          _mesa_error(ctx, GL_INVALID_ENUM,
1631                      "glFramebufferRenderbufferEXT(target)");
1632          return;
1633       }
1634       fb = ctx->DrawBuffer;
1635       break;
1636    case GL_READ_FRAMEBUFFER_EXT:
1637       if (!ctx->Extensions.EXT_framebuffer_blit) {
1638          _mesa_error(ctx, GL_INVALID_ENUM,
1639                      "glFramebufferRenderbufferEXT(target)");
1640          return;
1641       }
1642       fb = ctx->ReadBuffer;
1643       break;
1644 #endif
1645    case GL_FRAMEBUFFER_EXT:
1646       fb = ctx->DrawBuffer;
1647       break;
1648    default:
1649       _mesa_error(ctx, GL_INVALID_ENUM,
1650                   "glFramebufferRenderbufferEXT(target)");
1651       return;
1652    }
1653
1654    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1655       _mesa_error(ctx, GL_INVALID_ENUM,
1656                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1657       return;
1658    }
1659
1660    if (fb->Name == 0) {
1661       /* Can't attach new renderbuffers to a window system framebuffer */
1662       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1663       return;
1664    }
1665
1666    att = _mesa_get_attachment(ctx, fb, attachment);
1667    if (att == NULL) {
1668       _mesa_error(ctx, GL_INVALID_ENUM,
1669                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1670                   _mesa_lookup_enum_by_nr(attachment));
1671       return;
1672    }
1673
1674    if (renderbuffer) {
1675       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1676       if (!rb) {
1677          _mesa_error(ctx, GL_INVALID_OPERATION,
1678                      "glFramebufferRenderbufferEXT(non-existant"
1679                      " renderbuffer %u)", renderbuffer);
1680          return;
1681       }
1682    }
1683    else {
1684       /* remove renderbuffer attachment */
1685       rb = NULL;
1686    }
1687
1688    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1689       /* make sure the renderbuffer is a depth/stencil format */
1690       if (rb->_BaseFormat != GL_DEPTH_STENCIL) {
1691          _mesa_error(ctx, GL_INVALID_OPERATION,
1692                      "glFramebufferRenderbufferEXT(renderbuffer"
1693                      " is not DEPTH_STENCIL format)");
1694          return;
1695       }
1696    }
1697
1698
1699    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1700
1701    assert(ctx->Driver.FramebufferRenderbuffer);
1702    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1703
1704    /* Some subsequent GL commands may depend on the framebuffer's visual
1705     * after the binding is updated.  Update visual info now.
1706     */
1707    _mesa_update_framebuffer_visual(fb);
1708 }
1709
1710
1711 void GLAPIENTRY
1712 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1713                                              GLenum pname, GLint *params)
1714 {
1715    const struct gl_renderbuffer_attachment *att;
1716    struct gl_framebuffer *buffer;
1717    GET_CURRENT_CONTEXT(ctx);
1718
1719    ASSERT_OUTSIDE_BEGIN_END(ctx);
1720
1721    switch (target) {
1722 #if FEATURE_EXT_framebuffer_blit
1723    case GL_DRAW_FRAMEBUFFER_EXT:
1724       if (!ctx->Extensions.EXT_framebuffer_blit) {
1725          _mesa_error(ctx, GL_INVALID_ENUM,
1726                      "glGetFramebufferAttachmentParameterivEXT(target)");
1727          return;
1728       }
1729       buffer = ctx->DrawBuffer;
1730       break;
1731    case GL_READ_FRAMEBUFFER_EXT:
1732       if (!ctx->Extensions.EXT_framebuffer_blit) {
1733          _mesa_error(ctx, GL_INVALID_ENUM,
1734                      "glGetFramebufferAttachmentParameterivEXT(target)");
1735          return;
1736       }
1737       buffer = ctx->ReadBuffer;
1738       break;
1739 #endif
1740    case GL_FRAMEBUFFER_EXT:
1741       buffer = ctx->DrawBuffer;
1742       break;
1743    default:
1744       _mesa_error(ctx, GL_INVALID_ENUM,
1745                   "glGetFramebufferAttachmentParameterivEXT(target)");
1746       return;
1747    }
1748
1749    if (buffer->Name == 0) {
1750       _mesa_error(ctx, GL_INVALID_OPERATION,
1751                   "glGetFramebufferAttachmentParameterivEXT");
1752       return;
1753    }
1754
1755    att = _mesa_get_attachment(ctx, buffer, attachment);
1756    if (att == NULL) {
1757       _mesa_error(ctx, GL_INVALID_ENUM,
1758                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1759       return;
1760    }
1761
1762    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1763       /* the depth and stencil attachments must point to the same buffer */
1764       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
1765       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
1766       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
1767       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
1768          _mesa_error(ctx, GL_INVALID_OPERATION,
1769                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
1770                      " attachments differ)");
1771          return;
1772       }
1773    }
1774
1775    FLUSH_CURRENT(ctx, _NEW_BUFFERS);
1776
1777    switch (pname) {
1778    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
1779       *params = att->Type;
1780       return;
1781    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
1782       if (att->Type == GL_RENDERBUFFER_EXT) {
1783          *params = att->Renderbuffer->Name;
1784       }
1785       else if (att->Type == GL_TEXTURE) {
1786          *params = att->Texture->Name;
1787       }
1788       else {
1789          _mesa_error(ctx, GL_INVALID_ENUM,
1790                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1791       }
1792       return;
1793    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
1794       if (att->Type == GL_TEXTURE) {
1795          *params = att->TextureLevel;
1796       }
1797       else {
1798          _mesa_error(ctx, GL_INVALID_ENUM,
1799                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1800       }
1801       return;
1802    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
1803       if (att->Type == GL_TEXTURE) {
1804          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
1805             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
1806          }
1807          else {
1808             *params = 0;
1809          }
1810       }
1811       else {
1812          _mesa_error(ctx, GL_INVALID_ENUM,
1813                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1814       }
1815       return;
1816    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
1817       if (att->Type == GL_TEXTURE) {
1818          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
1819             *params = att->Zoffset;
1820          }
1821          else {
1822             *params = 0;
1823          }
1824       }
1825       else {
1826          _mesa_error(ctx, GL_INVALID_ENUM,
1827                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1828       }
1829       return;
1830    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
1831       if (!ctx->Extensions.ARB_framebuffer_object) {
1832          _mesa_error(ctx, GL_INVALID_ENUM,
1833                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1834       }
1835       else {
1836          *params = att->Renderbuffer->ColorEncoding;
1837       }
1838       return;
1839    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
1840       if (!ctx->Extensions.ARB_framebuffer_object) {
1841          _mesa_error(ctx, GL_INVALID_ENUM,
1842                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1843          return;
1844       }
1845       else {
1846          *params = att->Renderbuffer->ComponentType;
1847       }
1848       return;
1849    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1850       if (!ctx->Extensions.ARB_framebuffer_object) {
1851          _mesa_error(ctx, GL_INVALID_ENUM,
1852                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1853       }
1854       else {
1855          *params = att->Renderbuffer->RedBits;
1856       }
1857       return;
1858    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1859       if (!ctx->Extensions.ARB_framebuffer_object) {
1860          _mesa_error(ctx, GL_INVALID_ENUM,
1861                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1862       }
1863       else {
1864          *params = att->Renderbuffer->GreenBits;
1865       }
1866       return;
1867    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1868       if (!ctx->Extensions.ARB_framebuffer_object) {
1869          _mesa_error(ctx, GL_INVALID_ENUM,
1870                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1871       }
1872       else {
1873          *params = att->Renderbuffer->BlueBits;
1874       }
1875       return;
1876    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1877       if (!ctx->Extensions.ARB_framebuffer_object) {
1878          _mesa_error(ctx, GL_INVALID_ENUM,
1879                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1880       }
1881       else {
1882          *params = att->Renderbuffer->AlphaBits;
1883       }
1884       return;
1885    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1886       if (!ctx->Extensions.ARB_framebuffer_object) {
1887          _mesa_error(ctx, GL_INVALID_ENUM,
1888                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1889       }
1890       else {
1891          *params = att->Renderbuffer->DepthBits;
1892       }
1893       return;
1894    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1895       if (!ctx->Extensions.ARB_framebuffer_object) {
1896          _mesa_error(ctx, GL_INVALID_ENUM,
1897                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1898       }
1899       else {
1900          *params = att->Renderbuffer->StencilBits;
1901       }
1902       return;
1903    default:
1904       _mesa_error(ctx, GL_INVALID_ENUM,
1905                   "glGetFramebufferAttachmentParameterivEXT(pname)");
1906       return;
1907    }
1908 }
1909
1910
1911 void GLAPIENTRY
1912 _mesa_GenerateMipmapEXT(GLenum target)
1913 {
1914    struct gl_texture_unit *texUnit;
1915    struct gl_texture_object *texObj;
1916    GET_CURRENT_CONTEXT(ctx);
1917
1918    ASSERT_OUTSIDE_BEGIN_END(ctx);
1919    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1920
1921    switch (target) {
1922    case GL_TEXTURE_1D:
1923    case GL_TEXTURE_2D:
1924    case GL_TEXTURE_3D:
1925    case GL_TEXTURE_CUBE_MAP:
1926       /* OK, legal value */
1927       break;
1928    default:
1929       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
1930       return;
1931    }
1932
1933    texUnit = _mesa_get_current_tex_unit(ctx);
1934    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1935
1936    _mesa_lock_texture(ctx, texObj);
1937    if (target == GL_TEXTURE_CUBE_MAP) {
1938       GLuint face;
1939       for (face = 0; face < 6; face++)
1940          ctx->Driver.GenerateMipmap(ctx,
1941                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
1942                                     texObj);
1943    }
1944    else {
1945       ctx->Driver.GenerateMipmap(ctx, target, texObj);
1946    }
1947    _mesa_unlock_texture(ctx, texObj);
1948 }
1949
1950
1951 #if FEATURE_EXT_framebuffer_blit
1952 /**
1953  * Blit rectangular region, optionally from one framebuffer to another.
1954  *
1955  * Note, if the src buffer is multisampled and the dest is not, this is
1956  * when the samples must be resolved to a single color.
1957  */
1958 void GLAPIENTRY
1959 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1960                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1961                          GLbitfield mask, GLenum filter)
1962 {
1963    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
1964                                      GL_DEPTH_BUFFER_BIT |
1965                                      GL_STENCIL_BUFFER_BIT);
1966    const struct gl_framebuffer *readFb, *drawFb;
1967    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
1968    GET_CURRENT_CONTEXT(ctx);
1969
1970    ASSERT_OUTSIDE_BEGIN_END(ctx);
1971    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1972
1973    if (ctx->NewState) {
1974       _mesa_update_state(ctx);
1975    }
1976
1977    readFb = ctx->ReadBuffer;
1978    drawFb = ctx->DrawBuffer;
1979
1980    if (!readFb || !drawFb) {
1981       /* This will normally never happen but someday we may want to
1982        * support MakeCurrent() with no drawables.
1983        */
1984       return;
1985    }
1986
1987    /* check for complete framebuffers */
1988    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
1989        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
1990       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
1991                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
1992       return;
1993    }
1994
1995    if (filter != GL_NEAREST && filter != GL_LINEAR) {
1996       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
1997       return;
1998    }
1999
2000    if (mask & ~legalMaskBits) {
2001       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2002       return;
2003    }
2004
2005    /* depth/stencil must be blitted with nearest filtering */
2006    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2007         && filter != GL_NEAREST) {
2008       _mesa_error(ctx, GL_INVALID_OPERATION,
2009              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2010       return;
2011    }
2012
2013    /* get color read/draw renderbuffers */
2014    if (mask & GL_COLOR_BUFFER_BIT) {
2015       colorReadRb = readFb->_ColorReadBuffer;
2016       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2017    }
2018    else {
2019       colorReadRb = colorDrawRb = NULL;
2020    }
2021
2022    if (mask & GL_STENCIL_BUFFER_BIT) {
2023       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2024       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2025       if (!readRb ||
2026           !drawRb ||
2027           readRb->StencilBits != drawRb->StencilBits) {
2028          _mesa_error(ctx, GL_INVALID_OPERATION,
2029                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2030          return;
2031       }
2032    }
2033
2034    if (mask & GL_DEPTH_BUFFER_BIT) {
2035       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2036       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2037       if (!readRb ||
2038           !drawRb ||
2039           readRb->DepthBits != drawRb->DepthBits) {
2040          _mesa_error(ctx, GL_INVALID_OPERATION,
2041                      "glBlitFramebufferEXT(depth buffer size mismatch");
2042          return;
2043       }
2044    }
2045
2046    if (readFb->Visual.samples > 0 &&
2047        drawFb->Visual.samples > 0 &&
2048        readFb->Visual.samples != drawFb->Visual.samples) {
2049       _mesa_error(ctx, GL_INVALID_OPERATION,
2050                   "glBlitFramebufferEXT(mismatched samples");
2051       return;
2052    }
2053
2054    /* extra checks for multisample copies... */
2055    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2056       /* src and dest region sizes must be the same */
2057       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2058           srcY1 - srcY0 != dstY1 - dstY0) {
2059          _mesa_error(ctx, GL_INVALID_OPERATION,
2060                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2061          return;
2062       }
2063
2064       /* color formats must match */
2065       if (colorReadRb &&
2066           colorDrawRb &&
2067           colorReadRb->_ActualFormat != colorDrawRb->_ActualFormat) {
2068          _mesa_error(ctx, GL_INVALID_OPERATION,
2069                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2070          return;
2071       }
2072    }
2073
2074    if (!ctx->Extensions.EXT_framebuffer_blit) {
2075       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2076       return;
2077    }
2078
2079    ASSERT(ctx->Driver.BlitFramebuffer);
2080    ctx->Driver.BlitFramebuffer(ctx,
2081                                srcX0, srcY0, srcX1, srcY1,
2082                                dstX0, dstY0, dstX1, dstY1,
2083                                mask, filter);
2084 }
2085 #endif /* FEATURE_EXT_framebuffer_blit */