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