src/mesa/main/fbobject.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (C) 1999-2009  VMware, Inc.  All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /*
  28  * GL_EXT/ARB_framebuffer_object extensions
  29  *
  30  * Authors:
  31  *   Brian Paul
  32  */
  33
  34
  35 #include "buffers.h"
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "fbobject.h"
  39 #include "formats.h"
  40 #include "framebuffer.h"
  41 #include "hash.h"
  42 #include "macros.h"
  43 #include "mfeatures.h"
  44 #include "mtypes.h"
  45 #include "renderbuffer.h"
  46 #include "state.h"
  47 #include "teximage.h"
  48 #include "texobj.h"
  49
  50
  51 /** Set this to 1 to help debug FBO incompleteness problems */
  52 #define DEBUG_FBO 0
  53
  54 /** Set this to 1 to debug/log glBlitFramebuffer() calls */
  55 #define DEBUG_BLIT 0
  56
  57
  58 /**
  59  * Notes:
  60  *
  61  * None of the GL_EXT_framebuffer_object functions are compiled into
  62  * display lists.
  63  */
  64
  65
  66
  67 /*
  68  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  69  * these placeholder objects into the hash table.
  70  * Later, when the object ID is first bound, we replace the placeholder
  71  * with the real frame/renderbuffer.
  72  */
  73 static struct gl_framebuffer DummyFramebuffer;
  74 static struct gl_renderbuffer DummyRenderbuffer;
  75
  76 /* We bind this framebuffer when applications pass a NULL
  77  * drawable/surface in make current. */
  78 static struct gl_framebuffer IncompleteFramebuffer;
  79
  80
  81 #define IS_CUBE_FACE(TARGET) \
  82    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  83     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  84
  85
  86 static void
  87 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  88 {
  89    /* no op */
  90 }
  91
  92 static void
  93 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  94 {
  95    /* no op */
  96 }
  97
  98
  99 void
 100 _mesa_init_fbobjects(struct gl_context *ctx)
 101 {
 102    _glthread_INIT_MUTEX(DummyFramebuffer.Mutex);
 103    _glthread_INIT_MUTEX(DummyRenderbuffer.Mutex);
 104    _glthread_INIT_MUTEX(IncompleteFramebuffer.Mutex);
 105    DummyFramebuffer.Delete = delete_dummy_framebuffer;
 106    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
 107    IncompleteFramebuffer.Delete = delete_dummy_framebuffer;
 108 }
 109
 110 struct gl_framebuffer *
 111 _mesa_get_incomplete_framebuffer(void)
 112 {
 113    return &IncompleteFramebuffer;
 114 }
 115
 116 /**
 117  * Helper routine for getting a gl_renderbuffer.
 118  */
 119 struct gl_renderbuffer *
 120 _mesa_lookup_renderbuffer(struct gl_context *ctx, GLuint id)
 121 {
 122    struct gl_renderbuffer *rb;
 123
 124    if (id == 0)
 125       return NULL;
 126
 127    rb = (struct gl_renderbuffer *)
 128       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 129    return rb;
 130 }
 131
 132
 133 /**
 134  * Helper routine for getting a gl_framebuffer.
 135  */
 136 struct gl_framebuffer *
 137 _mesa_lookup_framebuffer(struct gl_context *ctx, GLuint id)
 138 {
 139    struct gl_framebuffer *fb;
 140
 141    if (id == 0)
 142       return NULL;
 143
 144    fb = (struct gl_framebuffer *)
 145       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 146    return fb;
 147 }
 148
 149
 150 /**
 151  * Mark the given framebuffer as invalid.  This will force the
 152  * test for framebuffer completeness to be done before the framebuffer
 153  * is used.
 154  */
 155 static void
 156 invalidate_framebuffer(struct gl_framebuffer *fb)
 157 {
 158    fb->_Status = 0; /* "indeterminate" */
 159 }
 160
 161
 162 /**
 163  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 164  * gl_renderbuffer_attachment object.
 165  * This function is only used for user-created FB objects, not the
 166  * default / window-system FB object.
 167  * If \p attachment is GL_DEPTH_STENCIL_ATTACHMENT, return a pointer to
 168  * the depth buffer attachment point.
 169  */
 170 struct gl_renderbuffer_attachment *
 171 _mesa_get_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 172                      GLenum attachment)
 173 {
 174    GLuint i;
 175
 176    assert(fb->Name > 0);
 177
 178    switch (attachment) {
 179    case GL_COLOR_ATTACHMENT0_EXT:
 180    case GL_COLOR_ATTACHMENT1_EXT:
 181    case GL_COLOR_ATTACHMENT2_EXT:
 182    case GL_COLOR_ATTACHMENT3_EXT:
 183    case GL_COLOR_ATTACHMENT4_EXT:
 184    case GL_COLOR_ATTACHMENT5_EXT:
 185    case GL_COLOR_ATTACHMENT6_EXT:
 186    case GL_COLOR_ATTACHMENT7_EXT:
 187    case GL_COLOR_ATTACHMENT8_EXT:
 188    case GL_COLOR_ATTACHMENT9_EXT:
 189    case GL_COLOR_ATTACHMENT10_EXT:
 190    case GL_COLOR_ATTACHMENT11_EXT:
 191    case GL_COLOR_ATTACHMENT12_EXT:
 192    case GL_COLOR_ATTACHMENT13_EXT:
 193    case GL_COLOR_ATTACHMENT14_EXT:
 194    case GL_COLOR_ATTACHMENT15_EXT:
 195       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 196       if (i >= ctx->Const.MaxColorAttachments) {
 197          return NULL;
 198       }
 199       return &fb->Attachment[BUFFER_COLOR0 + i];
 200    case GL_DEPTH_STENCIL_ATTACHMENT:
 201       /* fall-through */
 202    case GL_DEPTH_BUFFER:
 203       /* fall-through / new in GL 3.0 */
 204    case GL_DEPTH_ATTACHMENT_EXT:
 205       return &fb->Attachment[BUFFER_DEPTH];
 206    case GL_STENCIL_BUFFER:
 207       /* fall-through / new in GL 3.0 */
 208    case GL_STENCIL_ATTACHMENT_EXT:
 209       return &fb->Attachment[BUFFER_STENCIL];
 210    default:
 211       return NULL;
 212    }
 213 }
 214
 215
 216 /**
 217  * As above, but only used for getting attachments of the default /
 218  * window-system framebuffer (not user-created framebuffer objects).
 219  */
 220 static struct gl_renderbuffer_attachment *
 221 _mesa_get_fb0_attachment(struct gl_context *ctx, struct gl_framebuffer *fb,
 222                          GLenum attachment)
 223 {
 224    assert(fb->Name == 0);
 225
 226    switch (attachment) {
 227    case GL_FRONT_LEFT:
 228       return &fb->Attachment[BUFFER_FRONT_LEFT];
 229    case GL_FRONT_RIGHT:
 230       return &fb->Attachment[BUFFER_FRONT_RIGHT];
 231    case GL_BACK_LEFT:
 232       return &fb->Attachment[BUFFER_BACK_LEFT];
 233    case GL_BACK_RIGHT:
 234       return &fb->Attachment[BUFFER_BACK_RIGHT];
 235    case GL_AUX0:
 236       if (fb->Visual.numAuxBuffers == 1) {
 237          return &fb->Attachment[BUFFER_AUX0];
 238       }
 239       return NULL;
 240    case GL_DEPTH_BUFFER:
 241       /* fall-through / new in GL 3.0 */
 242    case GL_DEPTH_ATTACHMENT_EXT:
 243       return &fb->Attachment[BUFFER_DEPTH];
 244    case GL_STENCIL_BUFFER:
 245       /* fall-through / new in GL 3.0 */
 246    case GL_STENCIL_ATTACHMENT_EXT:
 247       return &fb->Attachment[BUFFER_STENCIL];
 248    default:
 249       return NULL;
 250    }
 251 }
 252
 253
 254
 255 /**
 256  * Remove any texture or renderbuffer attached to the given attachment
 257  * point.  Update reference counts, etc.
 258  */
 259 void
 260 _mesa_remove_attachment(struct gl_context *ctx,
 261                         struct gl_renderbuffer_attachment *att)
 262 {
 263    if (att->Type == GL_TEXTURE) {
 264       ASSERT(att->Texture);
 265       if (ctx->Driver.FinishRenderTexture) {
 266          /* tell driver that we're done rendering to this texture. */
 267          ctx->Driver.FinishRenderTexture(ctx, att);
 268       }
 269       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 270       ASSERT(!att->Texture);
 271    }
 272    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 273       ASSERT(!att->Texture);
 274       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 275       ASSERT(!att->Renderbuffer);
 276    }
 277    att->Type = GL_NONE;
 278    att->Complete = GL_TRUE;
 279 }
 280
 281
 282 /**
 283  * Bind a texture object to an attachment point.
 284  * The previous binding, if any, will be removed first.
 285  */
 286 void
 287 _mesa_set_texture_attachment(struct gl_context *ctx,
 288                              struct gl_framebuffer *fb,
 289                              struct gl_renderbuffer_attachment *att,
 290                              struct gl_texture_object *texObj,
 291                              GLenum texTarget, GLuint level, GLuint zoffset)
 292 {
 293    if (att->Texture == texObj) {
 294       /* re-attaching same texture */
 295       ASSERT(att->Type == GL_TEXTURE);
 296       if (ctx->Driver.FinishRenderTexture)
 297          ctx->Driver.FinishRenderTexture(ctx, att);
 298    }
 299    else {
 300       /* new attachment */
 301       if (ctx->Driver.FinishRenderTexture && att->Texture)
 302          ctx->Driver.FinishRenderTexture(ctx, att);
 303       _mesa_remove_attachment(ctx, att);
 304       att->Type = GL_TEXTURE;
 305       assert(!att->Texture);
 306       _mesa_reference_texobj(&att->Texture, texObj);
 307    }
 308
 309    /* always update these fields */
 310    att->TextureLevel = level;
 311    att->CubeMapFace = _mesa_tex_target_to_face(texTarget);
 312    att->Zoffset = zoffset;
 313    att->Complete = GL_FALSE;
 314
 315    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 316       ctx->Driver.RenderTexture(ctx, fb, att);
 317    }
 318
 319    invalidate_framebuffer(fb);
 320 }
 321
 322
 323 /**
 324  * Bind a renderbuffer to an attachment point.
 325  * The previous binding, if any, will be removed first.
 326  */
 327 void
 328 _mesa_set_renderbuffer_attachment(struct gl_context *ctx,
 329                                   struct gl_renderbuffer_attachment *att,
 330                                   struct gl_renderbuffer *rb)
 331 {
 332    /* XXX check if re-doing same attachment, exit early */
 333    _mesa_remove_attachment(ctx, att);
 334    att->Type = GL_RENDERBUFFER_EXT;
 335    att->Texture = NULL; /* just to be safe */
 336    att->Complete = GL_FALSE;
 337    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 338 }
 339
 340
 341 /**
 342  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 343  * Attach a renderbuffer object to a framebuffer object.
 344  */
 345 void
 346 _mesa_framebuffer_renderbuffer(struct gl_context *ctx,
 347                                struct gl_framebuffer *fb,
 348                                GLenum attachment, struct gl_renderbuffer *rb)
 349 {
 350    struct gl_renderbuffer_attachment *att;
 351
 352    _glthread_LOCK_MUTEX(fb->Mutex);
 353
 354    att = _mesa_get_attachment(ctx, fb, attachment);
 355    ASSERT(att);
 356    if (rb) {
 357       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 358       if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
 359          /* do stencil attachment here (depth already done above) */
 360          att = _mesa_get_attachment(ctx, fb, GL_STENCIL_ATTACHMENT_EXT);
 361          assert(att);
 362          _mesa_set_renderbuffer_attachment(ctx, att, rb);
 363       }
 364    }
 365    else {
 366       _mesa_remove_attachment(ctx, att);
 367    }
 368
 369    invalidate_framebuffer(fb);
 370
 371    _glthread_UNLOCK_MUTEX(fb->Mutex);
 372 }
 373
 374
 375 /**
 376  * For debug only.
 377  */
 378 static void
 379 att_incomplete(const char *msg)
 380 {
 381 #if DEBUG_FBO
 382    _mesa_debug(NULL, "attachment incomplete: %s\n", msg);
 383 #else
 384    (void) msg;
 385 #endif
 386 }
 387
 388
 389 /**
 390  * For debug only.
 391  */
 392 static void
 393 fbo_incomplete(const char *msg, int index)
 394 {
 395 #if DEBUG_FBO
 396    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 397 #else
 398    (void) msg;
 399    (void) index;
 400 #endif
 401 }
 402
 403
 404 /**
 405  * Is the given base format a legal format for a color renderbuffer?
 406  */
 407 GLboolean
 408 _mesa_is_legal_color_format(const struct gl_context *ctx, GLenum baseFormat)
 409 {
 410    switch (baseFormat) {
 411    case GL_RGB:
 412    case GL_RGBA:
 413       return GL_TRUE;
 414    case GL_LUMINANCE:
 415    case GL_LUMINANCE_ALPHA:
 416    case GL_INTENSITY:
 417    case GL_ALPHA:
 418       return ctx->Extensions.ARB_framebuffer_object;
 419    case GL_RED:
 420    case GL_RG:
 421       return ctx->Extensions.ARB_texture_rg;
 422    default:
 423       return GL_FALSE;
 424    }
 425 }
 426
 427
 428 /**
 429  * Is the given base format a legal format for a depth/stencil renderbuffer?
 430  */
 431 static GLboolean
 432 is_legal_depth_format(const struct gl_context *ctx, GLenum baseFormat)
 433 {
 434    switch (baseFormat) {
 435    case GL_DEPTH_COMPONENT:
 436    case GL_DEPTH_STENCIL_EXT:
 437       return GL_TRUE;
 438    default:
 439       return GL_FALSE;
 440    }
 441 }
 442
 443
 444 /**
 445  * Test if an attachment point is complete and update its Complete field.
 446  * \param format if GL_COLOR, this is a color attachment point,
 447  *               if GL_DEPTH, this is a depth component attachment point,
 448  *               if GL_STENCIL, this is a stencil component attachment point.
 449  */
 450 static void
 451 test_attachment_completeness(const struct gl_context *ctx, GLenum format,
 452                              struct gl_renderbuffer_attachment *att)
 453 {
 454    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 455
 456    /* assume complete */
 457    att->Complete = GL_TRUE;
 458
 459    /* Look for reasons why the attachment might be incomplete */
 460    if (att->Type == GL_TEXTURE) {
 461       const struct gl_texture_object *texObj = att->Texture;
 462       struct gl_texture_image *texImage;
 463       GLenum baseFormat;
 464
 465       if (!texObj) {
 466          att_incomplete("no texobj");
 467          att->Complete = GL_FALSE;
 468          return;
 469       }
 470
 471       texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
 472       if (!texImage) {
 473          att_incomplete("no teximage");
 474          att->Complete = GL_FALSE;
 475          return;
 476       }
 477       if (texImage->Width < 1 || texImage->Height < 1) {
 478          att_incomplete("teximage width/height=0");
 479          printf("texobj = %u\n", texObj->Name);
 480          printf("level = %d\n", att->TextureLevel);
 481          att->Complete = GL_FALSE;
 482          return;
 483       }
 484       if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
 485          att_incomplete("bad z offset");
 486          att->Complete = GL_FALSE;
 487          return;
 488       }
 489
 490       baseFormat = _mesa_get_format_base_format(texImage->TexFormat);
 491
 492       if (format == GL_COLOR) {
 493          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 494             att_incomplete("bad format");
 495             att->Complete = GL_FALSE;
 496             return;
 497          }
 498          if (_mesa_is_format_compressed(texImage->TexFormat)) {
 499             att_incomplete("compressed internalformat");
 500             att->Complete = GL_FALSE;
 501             return;
 502          }
 503       }
 504       else if (format == GL_DEPTH) {
 505          if (baseFormat == GL_DEPTH_COMPONENT) {
 506             /* OK */
 507          }
 508          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 509                   ctx->Extensions.ARB_depth_texture &&
 510                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 511             /* OK */
 512          }
 513          else {
 514             att->Complete = GL_FALSE;
 515             att_incomplete("bad depth format");
 516             return;
 517          }
 518       }
 519       else {
 520          ASSERT(format == GL_STENCIL);
 521          if (ctx->Extensions.EXT_packed_depth_stencil &&
 522              ctx->Extensions.ARB_depth_texture &&
 523              baseFormat == GL_DEPTH_STENCIL_EXT) {
 524             /* OK */
 525          }
 526          else {
 527             /* no such thing as stencil-only textures */
 528             att_incomplete("illegal stencil texture");
 529             att->Complete = GL_FALSE;
 530             return;
 531          }
 532       }
 533    }
 534    else if (att->Type == GL_RENDERBUFFER_EXT) {
 535       const GLenum baseFormat =
 536          _mesa_get_format_base_format(att->Renderbuffer->Format);
 537
 538       ASSERT(att->Renderbuffer);
 539       if (!att->Renderbuffer->InternalFormat ||
 540           att->Renderbuffer->Width < 1 ||
 541           att->Renderbuffer->Height < 1) {
 542          att_incomplete("0x0 renderbuffer");
 543          att->Complete = GL_FALSE;
 544          return;
 545       }
 546       if (format == GL_COLOR) {
 547          if (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 548             att_incomplete("bad renderbuffer color format");
 549             att->Complete = GL_FALSE;
 550             return;
 551          }
 552       }
 553       else if (format == GL_DEPTH) {
 554          if (baseFormat == GL_DEPTH_COMPONENT) {
 555             /* OK */
 556          }
 557          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 558                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 559             /* OK */
 560          }
 561          else {
 562             att_incomplete("bad renderbuffer depth format");
 563             att->Complete = GL_FALSE;
 564             return;
 565          }
 566       }
 567       else {
 568          assert(format == GL_STENCIL);
 569          if (baseFormat == GL_STENCIL_INDEX) {
 570             /* OK */
 571          }
 572          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 573                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 574             /* OK */
 575          }
 576          else {
 577             att->Complete = GL_FALSE;
 578             att_incomplete("bad renderbuffer stencil format");
 579             return;
 580          }
 581       }
 582    }
 583    else {
 584       ASSERT(att->Type == GL_NONE);
 585       /* complete */
 586       return;
 587    }
 588 }
 589
 590
 591 /**
 592  * Test if the given framebuffer object is complete and update its
 593  * Status field with the results.
 594  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 595  * driver to make hardware-specific validation/completeness checks.
 596  * Also update the framebuffer's Width and Height fields if the
 597  * framebuffer is complete.
 598  */
 599 void
 600 _mesa_test_framebuffer_completeness(struct gl_context *ctx,
 601                                     struct gl_framebuffer *fb)
 602 {
 603    GLuint numImages;
 604    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 605    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 606    GLint numSamples = -1;
 607    GLint i;
 608    GLuint j;
 609
 610    assert(fb->Name != 0);
 611
 612    numImages = 0;
 613    fb->Width = 0;
 614    fb->Height = 0;
 615
 616    /* Start at -2 to more easily loop over all attachment points.
 617     *  -2: depth buffer
 618     *  -1: stencil buffer
 619     * >=0: color buffer
 620     */
 621    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 622       struct gl_renderbuffer_attachment *att;
 623       GLenum f;
 624       gl_format mesaFormat;
 625
 626       /*
 627        * XXX for ARB_fbo, only check color buffers that are named by
 628        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 629        */
 630
 631       /* check for attachment completeness
 632        */
 633       if (i == -2) {
 634          att = &fb->Attachment[BUFFER_DEPTH];
 635          test_attachment_completeness(ctx, GL_DEPTH, att);
 636          if (!att->Complete) {
 637             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 638             fbo_incomplete("depth attachment incomplete", -1);
 639             return;
 640          }
 641       }
 642       else if (i == -1) {
 643          att = &fb->Attachment[BUFFER_STENCIL];
 644          test_attachment_completeness(ctx, GL_STENCIL, att);
 645          if (!att->Complete) {
 646             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 647             fbo_incomplete("stencil attachment incomplete", -1);
 648             return;
 649          }
 650       }
 651       else {
 652          att = &fb->Attachment[BUFFER_COLOR0 + i];
 653          test_attachment_completeness(ctx, GL_COLOR, att);
 654          if (!att->Complete) {
 655             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 656             fbo_incomplete("color attachment incomplete", i);
 657             return;
 658          }
 659       }
 660
 661       /* get width, height, format of the renderbuffer/texture
 662        */
 663       if (att->Type == GL_TEXTURE) {
 664          const struct gl_texture_image *texImg
 665             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 666          minWidth = MIN2(minWidth, texImg->Width);
 667          maxWidth = MAX2(maxWidth, texImg->Width);
 668          minHeight = MIN2(minHeight, texImg->Height);
 669          maxHeight = MAX2(maxHeight, texImg->Height);
 670          f = texImg->_BaseFormat;
 671          mesaFormat = texImg->TexFormat;
 672          numImages++;
 673          if (!_mesa_is_legal_color_format(ctx, f) &&
 674              !is_legal_depth_format(ctx, f)) {
 675             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 676             fbo_incomplete("texture attachment incomplete", -1);
 677             return;
 678          }
 679       }
 680       else if (att->Type == GL_RENDERBUFFER_EXT) {
 681          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 682          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 683          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 684          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 685          f = att->Renderbuffer->InternalFormat;
 686          mesaFormat = att->Renderbuffer->Format;
 687          numImages++;
 688       }
 689       else {
 690          assert(att->Type == GL_NONE);
 691          continue;
 692       }
 693
 694       if (numSamples < 0) {
 695          /* first buffer */
 696          numSamples = att->Renderbuffer->NumSamples;
 697       }
 698
 699       /* check if integer color */
 700       fb->_IntegerColor = _mesa_is_format_integer_color(mesaFormat);
 701
 702       /* Error-check width, height, format, samples
 703        */
 704       if (numImages == 1) {
 705          /* save format, num samples */
 706          if (i >= 0) {
 707             intFormat = f;
 708          }
 709       }
 710       else {
 711          if (!ctx->Extensions.ARB_framebuffer_object) {
 712             /* check that width, height, format are same */
 713             if (minWidth != maxWidth || minHeight != maxHeight) {
 714                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 715                fbo_incomplete("width or height mismatch", -1);
 716                return;
 717             }
 718             /* check that all color buffer have same format */
 719             if (intFormat != GL_NONE && f != intFormat) {
 720                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 721                fbo_incomplete("format mismatch", -1);
 722                return;
 723             }
 724          }
 725          if (att->Renderbuffer &&
 726              att->Renderbuffer->NumSamples != numSamples) {
 727             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 728             fbo_incomplete("inconsistant number of samples", i);
 729             return;
 730          }
 731
 732       }
 733    }
 734
 735 #if FEATURE_GL
 736    if (ctx->API == API_OPENGL) {
 737       /* Check that all DrawBuffers are present */
 738       for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 739          if (fb->ColorDrawBuffer[j] != GL_NONE) {
 740             const struct gl_renderbuffer_attachment *att
 741                = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 742             assert(att);
 743             if (att->Type == GL_NONE) {
 744                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 745                fbo_incomplete("missing drawbuffer", j);
 746                return;
 747             }
 748          }
 749       }
 750
 751       /* Check that the ReadBuffer is present */
 752       if (fb->ColorReadBuffer != GL_NONE) {
 753          const struct gl_renderbuffer_attachment *att
 754             = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 755          assert(att);
 756          if (att->Type == GL_NONE) {
 757             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 758             fbo_incomplete("missing readbuffer", -1);
 759             return;
 760          }
 761       }
 762    }
 763 #else
 764    (void) j;
 765 #endif
 766
 767    if (numImages == 0) {
 768       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 769       fbo_incomplete("no attachments", -1);
 770       return;
 771    }
 772
 773    /* Provisionally set status = COMPLETE ... */
 774    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 775
 776    /* ... but the driver may say the FB is incomplete.
 777     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 778     * if anything.
 779     */
 780    if (ctx->Driver.ValidateFramebuffer) {
 781       ctx->Driver.ValidateFramebuffer(ctx, fb);
 782       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 783          fbo_incomplete("driver marked FBO as incomplete", -1);
 784       }
 785    }
 786
 787    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 788       /*
 789        * Note that if ARB_framebuffer_object is supported and the attached
 790        * renderbuffers/textures are different sizes, the framebuffer
 791        * width/height will be set to the smallest width/height.
 792        */
 793       fb->Width = minWidth;
 794       fb->Height = minHeight;
 795
 796       /* finally, update the visual info for the framebuffer */
 797       _mesa_update_framebuffer_visual(ctx, fb);
 798    }
 799 }
 800
 801
 802 GLboolean GLAPIENTRY
 803 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 804 {
 805    GET_CURRENT_CONTEXT(ctx);
 806    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 807    if (renderbuffer) {
 808       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 809       if (rb != NULL && rb != &DummyRenderbuffer)
 810          return GL_TRUE;
 811    }
 812    return GL_FALSE;
 813 }
 814
 815
 816 void GLAPIENTRY
 817 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 818 {
 819    struct gl_renderbuffer *newRb;
 820    GET_CURRENT_CONTEXT(ctx);
 821
 822    ASSERT_OUTSIDE_BEGIN_END(ctx);
 823
 824    if (target != GL_RENDERBUFFER_EXT) {
 825       _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
 826       return;
 827    }
 828
 829    /* No need to flush here since the render buffer binding has no
 830     * effect on rendering state.
 831     */
 832
 833    if (renderbuffer) {
 834       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 835       if (newRb == &DummyRenderbuffer) {
 836          /* ID was reserved, but no real renderbuffer object made yet */
 837          newRb = NULL;
 838       }
 839       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 840          /* All RB IDs must be Gen'd */
 841          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 842          return;
 843       }
 844
 845       if (!newRb) {
 846          /* create new renderbuffer object */
 847          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 848          if (!newRb) {
 849             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 850             return;
 851          }
 852          ASSERT(newRb->AllocStorage);
 853          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 854          newRb->RefCount = 1; /* referenced by hash table */
 855       }
 856    }
 857    else {
 858       newRb = NULL;
 859    }
 860
 861    ASSERT(newRb != &DummyRenderbuffer);
 862
 863    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 864 }
 865
 866
 867 /**
 868  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 869  * the renderbuffer.
 870  * This is used when a renderbuffer object is deleted.
 871  * The spec calls for unbinding.
 872  */
 873 static void
 874 detach_renderbuffer(struct gl_context *ctx,
 875                     struct gl_framebuffer *fb,
 876                     struct gl_renderbuffer *rb)
 877 {
 878    GLuint i;
 879    for (i = 0; i < BUFFER_COUNT; i++) {
 880       if (fb->Attachment[i].Renderbuffer == rb) {
 881          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 882       }
 883    }
 884    invalidate_framebuffer(fb);
 885 }
 886
 887
 888 void GLAPIENTRY
 889 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 890 {
 891    GLint i;
 892    GET_CURRENT_CONTEXT(ctx);
 893
 894    ASSERT_OUTSIDE_BEGIN_END(ctx);
 895    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 896
 897    for (i = 0; i < n; i++) {
 898       if (renderbuffers[i] > 0) {
 899          struct gl_renderbuffer *rb;
 900          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 901          if (rb) {
 902             /* check if deleting currently bound renderbuffer object */
 903             if (rb == ctx->CurrentRenderbuffer) {
 904                /* bind default */
 905                ASSERT(rb->RefCount >= 2);
 906                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 907             }
 908
 909             if (ctx->DrawBuffer->Name) {
 910                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 911             }
 912             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 913                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 914             }
 915
 916             /* Remove from hash table immediately, to free the ID.
 917              * But the object will not be freed until it's no longer
 918              * referenced anywhere else.
 919              */
 920             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 921
 922             if (rb != &DummyRenderbuffer) {
 923                /* no longer referenced by hash table */
 924                _mesa_reference_renderbuffer(&rb, NULL);
 925             }
 926          }
 927       }
 928    }
 929 }
 930
 931
 932 void GLAPIENTRY
 933 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 934 {
 935    GET_CURRENT_CONTEXT(ctx);
 936    GLuint first;
 937    GLint i;
 938
 939    ASSERT_OUTSIDE_BEGIN_END(ctx);
 940
 941    if (n < 0) {
 942       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 943       return;
 944    }
 945
 946    if (!renderbuffers)
 947       return;
 948
 949    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 950
 951    for (i = 0; i < n; i++) {
 952       GLuint name = first + i;
 953       renderbuffers[i] = name;
 954       /* insert dummy placeholder into hash table */
 955       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 956       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 957       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 958    }
 959 }
 960
 961
 962 /**
 963  * Given an internal format token for a render buffer, return the
 964  * corresponding base format.
 965  * This is very similar to _mesa_base_tex_format() but the set of valid
 966  * internal formats is somewhat different.
 967  *
 968  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 969  *  GL_DEPTH_STENCIL_EXT or zero if error.
 970  *
 971  * XXX in the future when we support red-only and red-green formats
 972  * we'll also return GL_RED and GL_RG.
 973  */
 974 GLenum
 975 _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
 976 {
 977    switch (internalFormat) {
 978    case GL_ALPHA:
 979    case GL_ALPHA4:
 980    case GL_ALPHA8:
 981    case GL_ALPHA12:
 982    case GL_ALPHA16:
 983       return GL_ALPHA;
 984    case GL_RGB:
 985    case GL_R3_G3_B2:
 986    case GL_RGB4:
 987    case GL_RGB5:
 988    case GL_RGB8:
 989    case GL_RGB10:
 990    case GL_RGB12:
 991    case GL_RGB16:
 992       return GL_RGB;
 993    case GL_RGBA:
 994    case GL_RGBA2:
 995    case GL_RGBA4:
 996    case GL_RGB5_A1:
 997    case GL_RGBA8:
 998    case GL_RGB10_A2:
 999    case GL_RGBA12:
1000    case GL_RGBA16:
1001    case GL_RGBA16_SNORM:
1002       return GL_RGBA;
1003    case GL_STENCIL_INDEX:
1004    case GL_STENCIL_INDEX1_EXT:
1005    case GL_STENCIL_INDEX4_EXT:
1006    case GL_STENCIL_INDEX8_EXT:
1007    case GL_STENCIL_INDEX16_EXT:
1008       return GL_STENCIL_INDEX;
1009    case GL_DEPTH_COMPONENT:
1010    case GL_DEPTH_COMPONENT16:
1011    case GL_DEPTH_COMPONENT24:
1012    case GL_DEPTH_COMPONENT32:
1013       return GL_DEPTH_COMPONENT;
1014    case GL_DEPTH_STENCIL_EXT:
1015    case GL_DEPTH24_STENCIL8_EXT:
1016       if (ctx->Extensions.EXT_packed_depth_stencil)
1017          return GL_DEPTH_STENCIL_EXT;
1018       else
1019          return 0;
1020    /* XXX add floating point formats eventually */
1021    default:
1022       return 0;
1023    }
1024 }
1025
1026
1027 /** sentinal value, see below */
1028 #define NO_SAMPLES 1000
1029
1030
1031 /**
1032  * Helper function used by _mesa_RenderbufferStorageEXT() and
1033  * _mesa_RenderbufferStorageMultisample().
1034  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
1035  */
1036 static void
1037 renderbuffer_storage(GLenum target, GLenum internalFormat,
1038                      GLsizei width, GLsizei height, GLsizei samples)
1039 {
1040    const char *func = samples == NO_SAMPLES ?
1041       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
1042    struct gl_renderbuffer *rb;
1043    GLenum baseFormat;
1044    GET_CURRENT_CONTEXT(ctx);
1045
1046    ASSERT_OUTSIDE_BEGIN_END(ctx);
1047
1048    if (target != GL_RENDERBUFFER_EXT) {
1049       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
1050       return;
1051    }
1052
1053    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
1054    if (baseFormat == 0) {
1055       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
1056       return;
1057    }
1058
1059    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1060       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
1061       return;
1062    }
1063
1064    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1065       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
1066       return;
1067    }
1068
1069    if (samples == NO_SAMPLES) {
1070       /* NumSamples == 0 indicates non-multisampling */
1071       samples = 0;
1072    }
1073    else if (samples > (GLsizei) ctx->Const.MaxSamples) {
1074       /* note: driver may choose to use more samples than what's requested */
1075       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
1076       return;
1077    }
1078
1079    rb = ctx->CurrentRenderbuffer;
1080    if (!rb) {
1081       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
1082       return;
1083    }
1084
1085    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1086
1087    if (rb->InternalFormat == internalFormat &&
1088        rb->Width == (GLuint) width &&
1089        rb->Height == (GLuint) height) {
1090       /* no change in allocation needed */
1091       return;
1092    }
1093
1094    /* These MUST get set by the AllocStorage func */
1095    rb->Format = MESA_FORMAT_NONE;
1096    rb->NumSamples = samples;
1097
1098    /* Now allocate the storage */
1099    ASSERT(rb->AllocStorage);
1100    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
1101       /* No error - check/set fields now */
1102       assert(rb->Format != MESA_FORMAT_NONE);
1103       assert(rb->Width == (GLuint) width);
1104       assert(rb->Height == (GLuint) height);
1105       rb->InternalFormat = internalFormat;
1106       rb->_BaseFormat = baseFormat;
1107       assert(rb->_BaseFormat != 0);
1108    }
1109    else {
1110       /* Probably ran out of memory - clear the fields */
1111       rb->Width = 0;
1112       rb->Height = 0;
1113       rb->Format = MESA_FORMAT_NONE;
1114       rb->InternalFormat = GL_NONE;
1115       rb->_BaseFormat = GL_NONE;
1116       rb->NumSamples = 0;
1117    }
1118
1119    /*
1120    test_framebuffer_completeness(ctx, fb);
1121    */
1122    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1123     * points???
1124     */
1125 }
1126
1127
1128 #if FEATURE_OES_EGL_image
1129 void GLAPIENTRY
1130 _mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
1131 {
1132    struct gl_renderbuffer *rb;
1133    GET_CURRENT_CONTEXT(ctx);
1134    ASSERT_OUTSIDE_BEGIN_END(ctx);
1135
1136    if (!ctx->Extensions.OES_EGL_image) {
1137       _mesa_error(ctx, GL_INVALID_OPERATION,
1138                   "glEGLImageTargetRenderbufferStorageOES(unsupported)");
1139       return;
1140    }
1141
1142    if (target != GL_RENDERBUFFER) {
1143       _mesa_error(ctx, GL_INVALID_ENUM,
1144                   "EGLImageTargetRenderbufferStorageOES");
1145       return;
1146    }
1147
1148    rb = ctx->CurrentRenderbuffer;
1149    if (!rb) {
1150       _mesa_error(ctx, GL_INVALID_OPERATION,
1151                   "EGLImageTargetRenderbufferStorageOES");
1152       return;
1153    }
1154
1155    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1156
1157    ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
1158 }
1159 #endif
1160
1161
1162 /**
1163  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1164  * _mesa_GetFramebufferAttachmentParameterivEXT()
1165  * We have to be careful to respect the base format.  For example, if a
1166  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1167  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1168  * we need to return zero.
1169  */
1170 static GLint
1171 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1172 {
1173    switch (pname) {
1174    case GL_RENDERBUFFER_RED_SIZE_EXT:
1175    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1176       if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
1177           baseFormat == GL_RG || baseFormat == GL_RED)
1178          return _mesa_get_format_bits(format, pname);
1179       else
1180          return 0;
1181    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1182    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1183       if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
1184          return _mesa_get_format_bits(format, pname);
1185       else
1186          return 0;
1187    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1188    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1189       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1190          return _mesa_get_format_bits(format, pname);
1191       else
1192          return 0;
1193    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1194    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1195       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
1196           baseFormat == GL_LUMINANCE_ALPHA)
1197          return _mesa_get_format_bits(format, pname);
1198       else
1199          return 0;
1200    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1201    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1202       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1203          return _mesa_get_format_bits(format, pname);
1204       else
1205          return 0;
1206    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1207    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1208       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1209          return _mesa_get_format_bits(format, pname);
1210       else
1211          return 0;
1212    default:
1213       return 0;
1214    }
1215 }
1216
1217
1218
1219 void GLAPIENTRY
1220 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1221                              GLsizei width, GLsizei height)
1222 {
1223    /* GL_ARB_fbo says calling this function is equivalent to calling
1224     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1225     * a token value here just for error reporting purposes.
1226     */
1227    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1228 }
1229
1230
1231 void GLAPIENTRY
1232 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1233                                      GLenum internalFormat,
1234                                      GLsizei width, GLsizei height)
1235 {
1236    renderbuffer_storage(target, internalFormat, width, height, samples);
1237 }
1238
1239
1240 /**
1241  * OpenGL ES version of glRenderBufferStorage.
1242  */
1243 void GLAPIENTRY
1244 _es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1245                            GLsizei width, GLsizei height)
1246 {
1247    switch (internalFormat) {
1248    case GL_RGB565:
1249       /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
1250       /* choose a closest format */
1251       internalFormat = GL_RGB5;
1252       break;
1253    default:
1254       break;
1255    }
1256
1257    renderbuffer_storage(target, internalFormat, width, height, 0);
1258 }
1259
1260
1261 void GLAPIENTRY
1262 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1263 {
1264    struct gl_renderbuffer *rb;
1265    GET_CURRENT_CONTEXT(ctx);
1266
1267    ASSERT_OUTSIDE_BEGIN_END(ctx);
1268
1269    if (target != GL_RENDERBUFFER_EXT) {
1270       _mesa_error(ctx, GL_INVALID_ENUM,
1271                   "glGetRenderbufferParameterivEXT(target)");
1272       return;
1273    }
1274
1275    rb = ctx->CurrentRenderbuffer;
1276    if (!rb) {
1277       _mesa_error(ctx, GL_INVALID_OPERATION,
1278                   "glGetRenderbufferParameterivEXT");
1279       return;
1280    }
1281
1282    /* No need to flush here since we're just quering state which is
1283     * not effected by rendering.
1284     */
1285
1286    switch (pname) {
1287    case GL_RENDERBUFFER_WIDTH_EXT:
1288       *params = rb->Width;
1289       return;
1290    case GL_RENDERBUFFER_HEIGHT_EXT:
1291       *params = rb->Height;
1292       return;
1293    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1294       *params = rb->InternalFormat;
1295       return;
1296    case GL_RENDERBUFFER_RED_SIZE_EXT:
1297    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1298    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1299    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1300    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1301    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1302       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1303       break;
1304    case GL_RENDERBUFFER_SAMPLES:
1305       if (ctx->Extensions.ARB_framebuffer_object) {
1306          *params = rb->NumSamples;
1307          break;
1308       }
1309       /* fallthrough */
1310    default:
1311       _mesa_error(ctx, GL_INVALID_ENUM,
1312                   "glGetRenderbufferParameterivEXT(target)");
1313       return;
1314    }
1315 }
1316
1317
1318 GLboolean GLAPIENTRY
1319 _mesa_IsFramebufferEXT(GLuint framebuffer)
1320 {
1321    GET_CURRENT_CONTEXT(ctx);
1322    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1323    if (framebuffer) {
1324       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1325       if (rb != NULL && rb != &DummyFramebuffer)
1326          return GL_TRUE;
1327    }
1328    return GL_FALSE;
1329 }
1330
1331
1332 /**
1333  * Check if any of the attachments of the given framebuffer are textures
1334  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1335  * attachments.
1336  */
1337 static void
1338 check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1339 {
1340    GLuint i;
1341    ASSERT(ctx->Driver.RenderTexture);
1342
1343    if (fb->Name == 0)
1344       return; /* can't render to texture with winsys framebuffers */
1345
1346    for (i = 0; i < BUFFER_COUNT; i++) {
1347       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1348       struct gl_texture_object *texObj = att->Texture;
1349       if (texObj
1350           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1351          ctx->Driver.RenderTexture(ctx, fb, att);
1352       }
1353    }
1354 }
1355
1356
1357 /**
1358  * Examine all the framebuffer's attachments to see if any are textures.
1359  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1360  * notify the device driver that the texture image may have changed.
1361  */
1362 static void
1363 check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1364 {
1365    if (fb->Name == 0)
1366       return; /* can't render to texture with winsys framebuffers */
1367
1368    if (ctx->Driver.FinishRenderTexture) {
1369       GLuint i;
1370       for (i = 0; i < BUFFER_COUNT; i++) {
1371          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1372          if (att->Texture && att->Renderbuffer) {
1373             ctx->Driver.FinishRenderTexture(ctx, att);
1374          }
1375       }
1376    }
1377 }
1378
1379
1380 void GLAPIENTRY
1381 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1382 {
1383    struct gl_framebuffer *newDrawFb, *newReadFb;
1384    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1385    GLboolean bindReadBuf, bindDrawBuf;
1386    GET_CURRENT_CONTEXT(ctx);
1387
1388 #ifdef DEBUG
1389    if (ctx->Extensions.ARB_framebuffer_object) {
1390       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1391       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1392    }
1393 #endif
1394
1395    ASSERT_OUTSIDE_BEGIN_END(ctx);
1396
1397    if (!ctx->Extensions.EXT_framebuffer_object) {
1398       _mesa_error(ctx, GL_INVALID_OPERATION,
1399                   "glBindFramebufferEXT(unsupported)");
1400       return;
1401    }
1402
1403    switch (target) {
1404 #if FEATURE_EXT_framebuffer_blit
1405    case GL_DRAW_FRAMEBUFFER_EXT:
1406       if (!ctx->Extensions.EXT_framebuffer_blit) {
1407          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1408          return;
1409       }
1410       bindDrawBuf = GL_TRUE;
1411       bindReadBuf = GL_FALSE;
1412       break;
1413    case GL_READ_FRAMEBUFFER_EXT:
1414       if (!ctx->Extensions.EXT_framebuffer_blit) {
1415          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1416          return;
1417       }
1418       bindDrawBuf = GL_FALSE;
1419       bindReadBuf = GL_TRUE;
1420       break;
1421 #endif
1422    case GL_FRAMEBUFFER_EXT:
1423       bindDrawBuf = GL_TRUE;
1424       bindReadBuf = GL_TRUE;
1425       break;
1426    default:
1427       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1428       return;
1429    }
1430
1431    if (framebuffer) {
1432       /* Binding a user-created framebuffer object */
1433       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1434       if (newDrawFb == &DummyFramebuffer) {
1435          /* ID was reserved, but no real framebuffer object made yet */
1436          newDrawFb = NULL;
1437       }
1438       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1439          /* All FBO IDs must be Gen'd */
1440          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1441          return;
1442       }
1443
1444       if (!newDrawFb) {
1445          /* create new framebuffer object */
1446          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1447          if (!newDrawFb) {
1448             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1449             return;
1450          }
1451          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1452       }
1453       newReadFb = newDrawFb;
1454    }
1455    else {
1456       /* Binding the window system framebuffer (which was originally set
1457        * with MakeCurrent).
1458        */
1459       newDrawFb = ctx->WinSysDrawBuffer;
1460       newReadFb = ctx->WinSysReadBuffer;
1461    }
1462
1463    ASSERT(newDrawFb);
1464    ASSERT(newDrawFb != &DummyFramebuffer);
1465
1466    /* save pointers to current/old framebuffers */
1467    oldDrawFb = ctx->DrawBuffer;
1468    oldReadFb = ctx->ReadBuffer;
1469
1470    /* check if really changing bindings */
1471    if (oldDrawFb == newDrawFb)
1472       bindDrawBuf = GL_FALSE;
1473    if (oldReadFb == newReadFb)
1474       bindReadBuf = GL_FALSE;
1475
1476    /*
1477     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1478     *
1479     * We also check if we're beginning and/or ending render-to-texture.
1480     * When a framebuffer with texture attachments is unbound, call
1481     * ctx->Driver.FinishRenderTexture().
1482     * When a framebuffer with texture attachments is bound, call
1483     * ctx->Driver.RenderTexture().
1484     *
1485     * Note that if the ReadBuffer has texture attachments we don't consider
1486     * that a render-to-texture case.
1487     */
1488    if (bindReadBuf) {
1489       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1490
1491       /* check if old readbuffer was render-to-texture */
1492       check_end_texture_render(ctx, oldReadFb);
1493
1494       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1495    }
1496
1497    if (bindDrawBuf) {
1498       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1499
1500       /* check if old read/draw buffers were render-to-texture */
1501       if (!bindReadBuf)
1502          check_end_texture_render(ctx, oldReadFb);
1503
1504       if (oldDrawFb != oldReadFb)
1505          check_end_texture_render(ctx, oldDrawFb);
1506
1507       /* check if newly bound framebuffer has any texture attachments */
1508       check_begin_texture_render(ctx, newDrawFb);
1509
1510       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1511    }
1512
1513    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1514       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1515    }
1516 }
1517
1518
1519 void GLAPIENTRY
1520 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1521 {
1522    GLint i;
1523    GET_CURRENT_CONTEXT(ctx);
1524
1525    ASSERT_OUTSIDE_BEGIN_END(ctx);
1526    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1527
1528    for (i = 0; i < n; i++) {
1529       if (framebuffers[i] > 0) {
1530          struct gl_framebuffer *fb;
1531          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1532          if (fb) {
1533             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1534
1535             /* check if deleting currently bound framebuffer object */
1536             if (ctx->Extensions.EXT_framebuffer_blit) {
1537                /* separate draw/read binding points */
1538                if (fb == ctx->DrawBuffer) {
1539                   /* bind default */
1540                   ASSERT(fb->RefCount >= 2);
1541                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1542                }
1543                if (fb == ctx->ReadBuffer) {
1544                   /* bind default */
1545                   ASSERT(fb->RefCount >= 2);
1546                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1547                }
1548             }
1549             else {
1550                /* only one binding point for read/draw buffers */
1551                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1552                   /* bind default */
1553                   ASSERT(fb->RefCount >= 2);
1554                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1555                }
1556             }
1557
1558             /* remove from hash table immediately, to free the ID */
1559             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1560
1561             if (fb != &DummyFramebuffer) {
1562                /* But the object will not be freed until it's no longer
1563                 * bound in any context.
1564                 */
1565                _mesa_reference_framebuffer(&fb, NULL);
1566             }
1567          }
1568       }
1569    }
1570 }
1571
1572
1573 void GLAPIENTRY
1574 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1575 {
1576    GET_CURRENT_CONTEXT(ctx);
1577    GLuint first;
1578    GLint i;
1579
1580    ASSERT_OUTSIDE_BEGIN_END(ctx);
1581
1582    if (n < 0) {
1583       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1584       return;
1585    }
1586
1587    if (!framebuffers)
1588       return;
1589
1590    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1591
1592    for (i = 0; i < n; i++) {
1593       GLuint name = first + i;
1594       framebuffers[i] = name;
1595       /* insert dummy placeholder into hash table */
1596       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1597       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1598       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1599    }
1600 }
1601
1602
1603
1604 GLenum GLAPIENTRY
1605 _mesa_CheckFramebufferStatusEXT(GLenum target)
1606 {
1607    struct gl_framebuffer *buffer;
1608    GET_CURRENT_CONTEXT(ctx);
1609
1610    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1611
1612    switch (target) {
1613 #if FEATURE_EXT_framebuffer_blit
1614    case GL_DRAW_FRAMEBUFFER_EXT:
1615       if (!ctx->Extensions.EXT_framebuffer_blit) {
1616          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1617          return 0;
1618       }
1619       buffer = ctx->DrawBuffer;
1620       break;
1621    case GL_READ_FRAMEBUFFER_EXT:
1622       if (!ctx->Extensions.EXT_framebuffer_blit) {
1623          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1624          return 0;
1625       }
1626       buffer = ctx->ReadBuffer;
1627       break;
1628 #endif
1629    case GL_FRAMEBUFFER_EXT:
1630       buffer = ctx->DrawBuffer;
1631       break;
1632    default:
1633       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1634       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1635    }
1636
1637    if (buffer->Name == 0) {
1638       /* The window system / default framebuffer is always complete */
1639       return GL_FRAMEBUFFER_COMPLETE_EXT;
1640    }
1641
1642    /* No need to flush here */
1643
1644    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1645       _mesa_test_framebuffer_completeness(ctx, buffer);
1646    }
1647
1648    return buffer->_Status;
1649 }
1650
1651
1652
1653 /**
1654  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1655  */
1656 static void
1657 framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
1658                     GLenum attachment, GLenum textarget, GLuint texture,
1659                     GLint level, GLint zoffset)
1660 {
1661    struct gl_renderbuffer_attachment *att;
1662    struct gl_texture_object *texObj = NULL;
1663    struct gl_framebuffer *fb;
1664    GLboolean error = GL_FALSE;
1665
1666    ASSERT_OUTSIDE_BEGIN_END(ctx);
1667
1668    switch (target) {
1669    case GL_READ_FRAMEBUFFER_EXT:
1670       error = !ctx->Extensions.EXT_framebuffer_blit;
1671       fb = ctx->ReadBuffer;
1672       break;
1673    case GL_DRAW_FRAMEBUFFER_EXT:
1674       error = !ctx->Extensions.EXT_framebuffer_blit;
1675       /* fall-through */
1676    case GL_FRAMEBUFFER_EXT:
1677       fb = ctx->DrawBuffer;
1678       break;
1679    default:
1680       error = GL_TRUE;
1681    }
1682
1683    if (error) {
1684       _mesa_error(ctx, GL_INVALID_ENUM,
1685                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1686       return;
1687    }
1688
1689    ASSERT(fb);
1690
1691    /* check framebuffer binding */
1692    if (fb->Name == 0) {
1693       _mesa_error(ctx, GL_INVALID_OPERATION,
1694                   "glFramebufferTexture%sEXT", caller);
1695       return;
1696    }
1697
1698
1699    /* The textarget, level, and zoffset parameters are only validated if
1700     * texture is non-zero.
1701     */
1702    if (texture) {
1703       GLboolean err = GL_TRUE;
1704
1705       texObj = _mesa_lookup_texture(ctx, texture);
1706       if (texObj != NULL) {
1707          if (textarget == 0) {
1708             /* XXX what's the purpose of this? */
1709             err = (texObj->Target != GL_TEXTURE_3D) &&
1710                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1711                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1712          }
1713          else {
1714             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1715                 ? !IS_CUBE_FACE(textarget)
1716                 : (texObj->Target != textarget);
1717          }
1718       }
1719       else {
1720          /* can't render to a non-existant texture */
1721          _mesa_error(ctx, GL_INVALID_OPERATION,
1722                      "glFramebufferTexture%sEXT(non existant texture)",
1723                      caller);
1724          return;
1725       }
1726
1727       if (err) {
1728          _mesa_error(ctx, GL_INVALID_OPERATION,
1729                      "glFramebufferTexture%sEXT(texture target mismatch)",
1730                      caller);
1731          return;
1732       }
1733
1734       if (texObj->Target == GL_TEXTURE_3D) {
1735          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1736          if (zoffset < 0 || zoffset >= maxSize) {
1737             _mesa_error(ctx, GL_INVALID_VALUE,
1738                         "glFramebufferTexture%sEXT(zoffset)", caller);
1739             return;
1740          }
1741       }
1742       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1743                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1744          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1745             _mesa_error(ctx, GL_INVALID_VALUE,
1746                         "glFramebufferTexture%sEXT(layer)", caller);
1747             return;
1748          }
1749       }
1750
1751       if ((level < 0) ||
1752           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1753          _mesa_error(ctx, GL_INVALID_VALUE,
1754                      "glFramebufferTexture%sEXT(level)", caller);
1755          return;
1756       }
1757    }
1758
1759    att = _mesa_get_attachment(ctx, fb, attachment);
1760    if (att == NULL) {
1761       _mesa_error(ctx, GL_INVALID_ENUM,
1762                   "glFramebufferTexture%sEXT(attachment)", caller);
1763       return;
1764    }
1765
1766    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1767
1768    _glthread_LOCK_MUTEX(fb->Mutex);
1769    if (texObj) {
1770       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1771                                    level, zoffset);
1772       /* Set the render-to-texture flag.  We'll check this flag in
1773        * glTexImage() and friends to determine if we need to revalidate
1774        * any FBOs that might be rendering into this texture.
1775        * This flag never gets cleared since it's non-trivial to determine
1776        * when all FBOs might be done rendering to this texture.  That's OK
1777        * though since it's uncommon to render to a texture then repeatedly
1778        * call glTexImage() to change images in the texture.
1779        */
1780       texObj->_RenderToTexture = GL_TRUE;
1781    }
1782    else {
1783       _mesa_remove_attachment(ctx, att);
1784    }
1785
1786    invalidate_framebuffer(fb);
1787
1788    _glthread_UNLOCK_MUTEX(fb->Mutex);
1789 }
1790
1791
1792
1793 void GLAPIENTRY
1794 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1795                               GLenum textarget, GLuint texture, GLint level)
1796 {
1797    GET_CURRENT_CONTEXT(ctx);
1798
1799    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1800       _mesa_error(ctx, GL_INVALID_ENUM,
1801                   "glFramebufferTexture1DEXT(textarget)");
1802       return;
1803    }
1804
1805    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1806                        level, 0);
1807 }
1808
1809
1810 void GLAPIENTRY
1811 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1812                               GLenum textarget, GLuint texture, GLint level)
1813 {
1814    GET_CURRENT_CONTEXT(ctx);
1815
1816    if ((texture != 0) &&
1817        (textarget != GL_TEXTURE_2D) &&
1818        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1819        (!IS_CUBE_FACE(textarget))) {
1820       _mesa_error(ctx, GL_INVALID_OPERATION,
1821                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1822       return;
1823    }
1824
1825    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1826                        level, 0);
1827 }
1828
1829
1830 void GLAPIENTRY
1831 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1832                               GLenum textarget, GLuint texture,
1833                               GLint level, GLint zoffset)
1834 {
1835    GET_CURRENT_CONTEXT(ctx);
1836
1837    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1838       _mesa_error(ctx, GL_INVALID_ENUM,
1839                   "glFramebufferTexture3DEXT(textarget)");
1840       return;
1841    }
1842
1843    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1844                        level, zoffset);
1845 }
1846
1847
1848 void GLAPIENTRY
1849 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1850                                  GLuint texture, GLint level, GLint layer)
1851 {
1852    GET_CURRENT_CONTEXT(ctx);
1853
1854    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1855                        level, layer);
1856 }
1857
1858
1859 void GLAPIENTRY
1860 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1861                                  GLenum renderbufferTarget,
1862                                  GLuint renderbuffer)
1863 {
1864    struct gl_renderbuffer_attachment *att;
1865    struct gl_framebuffer *fb;
1866    struct gl_renderbuffer *rb;
1867    GET_CURRENT_CONTEXT(ctx);
1868
1869    ASSERT_OUTSIDE_BEGIN_END(ctx);
1870
1871    switch (target) {
1872 #if FEATURE_EXT_framebuffer_blit
1873    case GL_DRAW_FRAMEBUFFER_EXT:
1874       if (!ctx->Extensions.EXT_framebuffer_blit) {
1875          _mesa_error(ctx, GL_INVALID_ENUM,
1876                      "glFramebufferRenderbufferEXT(target)");
1877          return;
1878       }
1879       fb = ctx->DrawBuffer;
1880       break;
1881    case GL_READ_FRAMEBUFFER_EXT:
1882       if (!ctx->Extensions.EXT_framebuffer_blit) {
1883          _mesa_error(ctx, GL_INVALID_ENUM,
1884                      "glFramebufferRenderbufferEXT(target)");
1885          return;
1886       }
1887       fb = ctx->ReadBuffer;
1888       break;
1889 #endif
1890    case GL_FRAMEBUFFER_EXT:
1891       fb = ctx->DrawBuffer;
1892       break;
1893    default:
1894       _mesa_error(ctx, GL_INVALID_ENUM,
1895                   "glFramebufferRenderbufferEXT(target)");
1896       return;
1897    }
1898
1899    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1900       _mesa_error(ctx, GL_INVALID_ENUM,
1901                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1902       return;
1903    }
1904
1905    if (fb->Name == 0) {
1906       /* Can't attach new renderbuffers to a window system framebuffer */
1907       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1908       return;
1909    }
1910
1911    att = _mesa_get_attachment(ctx, fb, attachment);
1912    if (att == NULL) {
1913       _mesa_error(ctx, GL_INVALID_ENUM,
1914                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1915                   _mesa_lookup_enum_by_nr(attachment));
1916       return;
1917    }
1918
1919    if (renderbuffer) {
1920       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1921       if (!rb) {
1922          _mesa_error(ctx, GL_INVALID_OPERATION,
1923                      "glFramebufferRenderbufferEXT(non-existant"
1924                      " renderbuffer %u)", renderbuffer);
1925          return;
1926       }
1927    }
1928    else {
1929       /* remove renderbuffer attachment */
1930       rb = NULL;
1931    }
1932
1933    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
1934        rb && rb->Format != MESA_FORMAT_NONE) {
1935       /* make sure the renderbuffer is a depth/stencil format */
1936       const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
1937       if (baseFormat != GL_DEPTH_STENCIL) {
1938          _mesa_error(ctx, GL_INVALID_OPERATION,
1939                      "glFramebufferRenderbufferEXT(renderbuffer"
1940                      " is not DEPTH_STENCIL format)");
1941          return;
1942       }
1943    }
1944
1945
1946    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1947
1948    assert(ctx->Driver.FramebufferRenderbuffer);
1949    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1950
1951    /* Some subsequent GL commands may depend on the framebuffer's visual
1952     * after the binding is updated.  Update visual info now.
1953     */
1954    _mesa_update_framebuffer_visual(ctx, fb);
1955 }
1956
1957
1958 void GLAPIENTRY
1959 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1960                                              GLenum pname, GLint *params)
1961 {
1962    const struct gl_renderbuffer_attachment *att;
1963    struct gl_framebuffer *buffer;
1964    GET_CURRENT_CONTEXT(ctx);
1965
1966    ASSERT_OUTSIDE_BEGIN_END(ctx);
1967
1968    switch (target) {
1969 #if FEATURE_EXT_framebuffer_blit
1970    case GL_DRAW_FRAMEBUFFER_EXT:
1971       if (!ctx->Extensions.EXT_framebuffer_blit) {
1972          _mesa_error(ctx, GL_INVALID_ENUM,
1973                      "glGetFramebufferAttachmentParameterivEXT(target)");
1974          return;
1975       }
1976       buffer = ctx->DrawBuffer;
1977       break;
1978    case GL_READ_FRAMEBUFFER_EXT:
1979       if (!ctx->Extensions.EXT_framebuffer_blit) {
1980          _mesa_error(ctx, GL_INVALID_ENUM,
1981                      "glGetFramebufferAttachmentParameterivEXT(target)");
1982          return;
1983       }
1984       buffer = ctx->ReadBuffer;
1985       break;
1986 #endif
1987    case GL_FRAMEBUFFER_EXT:
1988       buffer = ctx->DrawBuffer;
1989       break;
1990    default:
1991       _mesa_error(ctx, GL_INVALID_ENUM,
1992                   "glGetFramebufferAttachmentParameterivEXT(target)");
1993       return;
1994    }
1995
1996    if (buffer->Name == 0) {
1997       /* the default / window-system FBO */
1998       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
1999    }
2000    else {
2001       /* user-created framebuffer FBO */
2002       att = _mesa_get_attachment(ctx, buffer, attachment);
2003    }
2004
2005    if (att == NULL) {
2006       _mesa_error(ctx, GL_INVALID_ENUM,
2007                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
2008       return;
2009    }
2010
2011    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
2012       /* the depth and stencil attachments must point to the same buffer */
2013       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
2014       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
2015       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
2016       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
2017          _mesa_error(ctx, GL_INVALID_OPERATION,
2018                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
2019                      " attachments differ)");
2020          return;
2021       }
2022    }
2023
2024    /* No need to flush here */
2025
2026    switch (pname) {
2027    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
2028       *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : att->Type;
2029       return;
2030    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
2031       if (att->Type == GL_RENDERBUFFER_EXT) {
2032          *params = att->Renderbuffer->Name;
2033       }
2034       else if (att->Type == GL_TEXTURE) {
2035          *params = att->Texture->Name;
2036       }
2037       else {
2038          assert(att->Type == GL_NONE);
2039          *params = 0;
2040       }
2041       return;
2042    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
2043       if (att->Type == GL_TEXTURE) {
2044          *params = att->TextureLevel;
2045       }
2046       else {
2047          _mesa_error(ctx, GL_INVALID_ENUM,
2048                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2049       }
2050       return;
2051    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
2052       if (att->Type == GL_TEXTURE) {
2053          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
2054             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
2055          }
2056          else {
2057             *params = 0;
2058          }
2059       }
2060       else {
2061          _mesa_error(ctx, GL_INVALID_ENUM,
2062                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2063       }
2064       return;
2065    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
2066       if (att->Type == GL_TEXTURE) {
2067          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
2068             *params = att->Zoffset;
2069          }
2070          else {
2071             *params = 0;
2072          }
2073       }
2074       else {
2075          _mesa_error(ctx, GL_INVALID_ENUM,
2076                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2077       }
2078       return;
2079    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
2080       if (!ctx->Extensions.ARB_framebuffer_object) {
2081          _mesa_error(ctx, GL_INVALID_ENUM,
2082                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2083       }
2084       else {
2085          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
2086       }
2087       return;
2088    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
2089       if (!ctx->Extensions.ARB_framebuffer_object) {
2090          _mesa_error(ctx, GL_INVALID_ENUM,
2091                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2092          return;
2093       }
2094       else {
2095          gl_format format = att->Renderbuffer->Format;
2096          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
2097             /* special cases */
2098             *params = GL_INDEX;
2099          }
2100          else {
2101             *params = _mesa_get_format_datatype(format);
2102          }
2103       }
2104       return;
2105    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
2106    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
2107    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
2108    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
2109    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
2110    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
2111       if (!ctx->Extensions.ARB_framebuffer_object) {
2112          _mesa_error(ctx, GL_INVALID_ENUM,
2113                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2114       }
2115       else if (att->Texture) {
2116          const struct gl_texture_image *texImage =
2117             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
2118                                    att->TextureLevel);
2119          if (texImage) {
2120             *params = get_component_bits(pname, texImage->_BaseFormat,
2121                                          texImage->TexFormat);
2122          }
2123          else {
2124             *params = 0;
2125          }
2126       }
2127       else if (att->Renderbuffer) {
2128          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
2129                                       att->Renderbuffer->Format);
2130       }
2131       else {
2132          *params = 0;
2133       }
2134       return;
2135    default:
2136       _mesa_error(ctx, GL_INVALID_ENUM,
2137                   "glGetFramebufferAttachmentParameterivEXT(pname)");
2138       return;
2139    }
2140 }
2141
2142
2143 void GLAPIENTRY
2144 _mesa_GenerateMipmapEXT(GLenum target)
2145 {
2146    struct gl_texture_object *texObj;
2147    GET_CURRENT_CONTEXT(ctx);
2148
2149    ASSERT_OUTSIDE_BEGIN_END(ctx);
2150    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2151
2152    switch (target) {
2153    case GL_TEXTURE_1D:
2154    case GL_TEXTURE_2D:
2155    case GL_TEXTURE_3D:
2156    case GL_TEXTURE_CUBE_MAP:
2157       /* OK, legal value */
2158       break;
2159    default:
2160       /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */
2161       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
2162       return;
2163    }
2164
2165    texObj = _mesa_get_current_tex_object(ctx, target);
2166
2167    if (texObj->BaseLevel >= texObj->MaxLevel) {
2168       /* nothing to do */
2169       return;
2170    }
2171
2172    if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
2173        !_mesa_cube_complete(texObj)) {
2174       _mesa_error(ctx, GL_INVALID_OPERATION,
2175                   "glGenerateMipmap(incomplete cube map)");
2176       return;
2177    }
2178
2179    _mesa_lock_texture(ctx, texObj);
2180    if (target == GL_TEXTURE_CUBE_MAP) {
2181       GLuint face;
2182       for (face = 0; face < 6; face++)
2183          ctx->Driver.GenerateMipmap(ctx,
2184                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
2185                                     texObj);
2186    }
2187    else {
2188       ctx->Driver.GenerateMipmap(ctx, target, texObj);
2189    }
2190    _mesa_unlock_texture(ctx, texObj);
2191 }
2192
2193
2194 #if FEATURE_EXT_framebuffer_blit
2195
2196 static const struct gl_renderbuffer_attachment *
2197 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
2198 {
2199    GLuint i;
2200    for (i = 0; i < Elements(fb->Attachment); i++) {
2201       if (fb->Attachment[i].Renderbuffer == rb)
2202          return &fb->Attachment[i];
2203    }
2204    return NULL;
2205 }
2206
2207
2208
2209 /**
2210  * Blit rectangular region, optionally from one framebuffer to another.
2211  *
2212  * Note, if the src buffer is multisampled and the dest is not, this is
2213  * when the samples must be resolved to a single color.
2214  */
2215 void GLAPIENTRY
2216 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2217                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2218                          GLbitfield mask, GLenum filter)
2219 {
2220    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2221                                      GL_DEPTH_BUFFER_BIT |
2222                                      GL_STENCIL_BUFFER_BIT);
2223    const struct gl_framebuffer *readFb, *drawFb;
2224    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2225    GET_CURRENT_CONTEXT(ctx);
2226
2227    ASSERT_OUTSIDE_BEGIN_END(ctx);
2228    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2229
2230    if (ctx->NewState) {
2231       _mesa_update_state(ctx);
2232    }
2233
2234    readFb = ctx->ReadBuffer;
2235    drawFb = ctx->DrawBuffer;
2236
2237    if (!readFb || !drawFb) {
2238       /* This will normally never happen but someday we may want to
2239        * support MakeCurrent() with no drawables.
2240        */
2241       return;
2242    }
2243
2244    /* check for complete framebuffers */
2245    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2246        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2247       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2248                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2249       return;
2250    }
2251
2252    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2253       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2254       return;
2255    }
2256
2257    if (mask & ~legalMaskBits) {
2258       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2259       return;
2260    }
2261
2262    /* depth/stencil must be blitted with nearest filtering */
2263    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2264         && filter != GL_NEAREST) {
2265       _mesa_error(ctx, GL_INVALID_OPERATION,
2266              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2267       return;
2268    }
2269
2270    /* get color read/draw renderbuffers */
2271    if (mask & GL_COLOR_BUFFER_BIT) {
2272       colorReadRb = readFb->_ColorReadBuffer;
2273       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2274    }
2275    else {
2276       colorReadRb = colorDrawRb = NULL;
2277    }
2278
2279    if (mask & GL_STENCIL_BUFFER_BIT) {
2280       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2281       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2282       if (!readRb ||
2283           !drawRb ||
2284           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2285           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2286          _mesa_error(ctx, GL_INVALID_OPERATION,
2287                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2288          return;
2289       }
2290    }
2291
2292    if (mask & GL_DEPTH_BUFFER_BIT) {
2293       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2294       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2295       if (!readRb ||
2296           !drawRb ||
2297           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2298           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2299          _mesa_error(ctx, GL_INVALID_OPERATION,
2300                      "glBlitFramebufferEXT(depth buffer size mismatch");
2301          return;
2302       }
2303    }
2304
2305    if (readFb->Visual.samples > 0 &&
2306        drawFb->Visual.samples > 0 &&
2307        readFb->Visual.samples != drawFb->Visual.samples) {
2308       _mesa_error(ctx, GL_INVALID_OPERATION,
2309                   "glBlitFramebufferEXT(mismatched samples");
2310       return;
2311    }
2312
2313    /* extra checks for multisample copies... */
2314    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2315       /* src and dest region sizes must be the same */
2316       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2317           srcY1 - srcY0 != dstY1 - dstY0) {
2318          _mesa_error(ctx, GL_INVALID_OPERATION,
2319                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2320          return;
2321       }
2322
2323       /* color formats must match */
2324       if (colorReadRb &&
2325           colorDrawRb &&
2326           colorReadRb->Format != colorDrawRb->Format) {
2327          _mesa_error(ctx, GL_INVALID_OPERATION,
2328                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2329          return;
2330       }
2331    }
2332
2333    if (!ctx->Extensions.EXT_framebuffer_blit) {
2334       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2335       return;
2336    }
2337
2338    /* Debug code */
2339    if (DEBUG_BLIT) {
2340       printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2341              " 0x%x, 0x%x)\n",
2342              srcX0, srcY0, srcX1, srcY1,
2343              dstX0, dstY0, dstX1, dstY1,
2344              mask, filter);
2345       if (colorReadRb) {
2346          const struct gl_renderbuffer_attachment *att;
2347
2348          att = find_attachment(readFb, colorReadRb);
2349          printf("  Src FBO %u  RB %u (%dx%d)  ",
2350                 readFb->Name, colorReadRb->Name,
2351                 colorReadRb->Width, colorReadRb->Height);
2352          if (att && att->Texture) {
2353             printf("Tex %u  tgt 0x%x  level %u  face %u",
2354                    att->Texture->Name,
2355                    att->Texture->Target,
2356                    att->TextureLevel,
2357                    att->CubeMapFace);
2358          }
2359          printf("\n");
2360
2361          att = find_attachment(drawFb, colorDrawRb);
2362          printf("  Dst FBO %u  RB %u (%dx%d)  ",
2363                 drawFb->Name, colorDrawRb->Name,
2364                 colorDrawRb->Width, colorDrawRb->Height);
2365          if (att && att->Texture) {
2366             printf("Tex %u  tgt 0x%x  level %u  face %u",
2367                    att->Texture->Name,
2368                    att->Texture->Target,
2369                    att->TextureLevel,
2370                    att->CubeMapFace);
2371          }
2372          printf("\n");
2373       }
2374    }
2375
2376    ASSERT(ctx->Driver.BlitFramebuffer);
2377    ctx->Driver.BlitFramebuffer(ctx,
2378                                srcX0, srcY0, srcX1, srcY1,
2379                                dstX0, dstY0, dstX1, dstY1,
2380                                mask, filter);
2381 }
2382 #endif /* FEATURE_EXT_framebuffer_blit */
2383
2384 #if FEATURE_ARB_geometry_shader4
2385 void GLAPIENTRY
2386 _mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
2387                             GLuint texture, GLint level)
2388 {
2389    GET_CURRENT_CONTEXT(ctx);
2390    _mesa_error(ctx, GL_INVALID_OPERATION,
2391                "glFramebufferTextureARB "
2392                "not implemented!");
2393 }
2394
2395 void GLAPIENTRY
2396 _mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
2397                                 GLuint texture, GLint level, GLenum face)
2398 {
2399    GET_CURRENT_CONTEXT(ctx);
2400    _mesa_error(ctx, GL_INVALID_OPERATION,
2401                "glFramebufferTextureFaceARB "
2402                "not implemented!");
2403 }
2404 #endif /* FEATURE_ARB_geometry_shader4 */