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