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 GLboolean
 406 _mesa_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 (!_mesa_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 (!_mesa_is_legal_color_format(ctx, baseFormat)) {
 546             att_incomplete("bad renderbuffer color format");
 547             att->Complete = GL_FALSE;
 548             return;
 549          }
 550       }
 551       else if (format == GL_DEPTH) {
 552          if (baseFormat == GL_DEPTH_COMPONENT) {
 553             /* OK */
 554          }
 555          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 556                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 557             /* OK */
 558          }
 559          else {
 560             att_incomplete("bad renderbuffer depth format");
 561             att->Complete = GL_FALSE;
 562             return;
 563          }
 564       }
 565       else {
 566          assert(format == GL_STENCIL);
 567          if (baseFormat == GL_STENCIL_INDEX) {
 568             /* OK */
 569          }
 570          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 571                   baseFormat == GL_DEPTH_STENCIL_EXT) {
 572             /* OK */
 573          }
 574          else {
 575             att->Complete = GL_FALSE;
 576             att_incomplete("bad renderbuffer stencil format");
 577             return;
 578          }
 579       }
 580    }
 581    else {
 582       ASSERT(att->Type == GL_NONE);
 583       /* complete */
 584       return;
 585    }
 586 }
 587
 588
 589 /**
 590  * Test if the given framebuffer object is complete and update its
 591  * Status field with the results.
 592  * Calls the ctx->Driver.ValidateFramebuffer() function to allow the
 593  * driver to make hardware-specific validation/completeness checks.
 594  * Also update the framebuffer's Width and Height fields if the
 595  * framebuffer is complete.
 596  */
 597 void
 598 _mesa_test_framebuffer_completeness(struct gl_context *ctx,
 599                                     struct gl_framebuffer *fb)
 600 {
 601    GLuint numImages;
 602    GLenum intFormat = GL_NONE; /* color buffers' internal format */
 603    GLuint minWidth = ~0, minHeight = ~0, maxWidth = 0, maxHeight = 0;
 604    GLint numSamples = -1;
 605    GLint i;
 606    GLuint j;
 607
 608    assert(fb->Name != 0);
 609
 610    numImages = 0;
 611    fb->Width = 0;
 612    fb->Height = 0;
 613
 614    /* Start at -2 to more easily loop over all attachment points.
 615     *  -2: depth buffer
 616     *  -1: stencil buffer
 617     * >=0: color buffer
 618     */
 619    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 620       struct gl_renderbuffer_attachment *att;
 621       GLenum f;
 622       gl_format mesaFormat;
 623
 624       /*
 625        * XXX for ARB_fbo, only check color buffers that are named by
 626        * GL_READ_BUFFER and GL_DRAW_BUFFERi.
 627        */
 628
 629       /* check for attachment completeness
 630        */
 631       if (i == -2) {
 632          att = &fb->Attachment[BUFFER_DEPTH];
 633          test_attachment_completeness(ctx, GL_DEPTH, att);
 634          if (!att->Complete) {
 635             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 636             fbo_incomplete("depth attachment incomplete", -1);
 637             return;
 638          }
 639       }
 640       else if (i == -1) {
 641          att = &fb->Attachment[BUFFER_STENCIL];
 642          test_attachment_completeness(ctx, GL_STENCIL, att);
 643          if (!att->Complete) {
 644             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 645             fbo_incomplete("stencil attachment incomplete", -1);
 646             return;
 647          }
 648       }
 649       else {
 650          att = &fb->Attachment[BUFFER_COLOR0 + i];
 651          test_attachment_completeness(ctx, GL_COLOR, att);
 652          if (!att->Complete) {
 653             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 654             fbo_incomplete("color attachment incomplete", i);
 655             return;
 656          }
 657       }
 658
 659       /* get width, height, format of the renderbuffer/texture
 660        */
 661       if (att->Type == GL_TEXTURE) {
 662          const struct gl_texture_image *texImg
 663             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 664          minWidth = MIN2(minWidth, texImg->Width);
 665          maxWidth = MAX2(maxWidth, texImg->Width);
 666          minHeight = MIN2(minHeight, texImg->Height);
 667          maxHeight = MAX2(maxHeight, texImg->Height);
 668          f = texImg->_BaseFormat;
 669          mesaFormat = texImg->TexFormat;
 670          numImages++;
 671          if (!_mesa_is_legal_color_format(ctx, f) &&
 672              !is_legal_depth_format(ctx, f)) {
 673             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 674             fbo_incomplete("texture attachment incomplete", -1);
 675             return;
 676          }
 677       }
 678       else if (att->Type == GL_RENDERBUFFER_EXT) {
 679          minWidth = MIN2(minWidth, att->Renderbuffer->Width);
 680          maxWidth = MAX2(minWidth, att->Renderbuffer->Width);
 681          minHeight = MIN2(minHeight, att->Renderbuffer->Height);
 682          maxHeight = MAX2(minHeight, att->Renderbuffer->Height);
 683          f = att->Renderbuffer->InternalFormat;
 684          mesaFormat = att->Renderbuffer->Format;
 685          numImages++;
 686       }
 687       else {
 688          assert(att->Type == GL_NONE);
 689          continue;
 690       }
 691
 692       if (numSamples < 0) {
 693          /* first buffer */
 694          numSamples = att->Renderbuffer->NumSamples;
 695       }
 696
 697       /* check if integer color */
 698       fb->_IntegerColor = _mesa_is_format_integer_color(mesaFormat);
 699
 700       /* Error-check width, height, format, samples
 701        */
 702       if (numImages == 1) {
 703          /* save format, num samples */
 704          if (i >= 0) {
 705             intFormat = f;
 706          }
 707       }
 708       else {
 709          if (!ctx->Extensions.ARB_framebuffer_object) {
 710             /* check that width, height, format are same */
 711             if (minWidth != maxWidth || minHeight != maxHeight) {
 712                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 713                fbo_incomplete("width or height mismatch", -1);
 714                return;
 715             }
 716             /* check that all color buffer have same format */
 717             if (intFormat != GL_NONE && f != intFormat) {
 718                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 719                fbo_incomplete("format mismatch", -1);
 720                return;
 721             }
 722          }
 723          if (att->Renderbuffer &&
 724              att->Renderbuffer->NumSamples != numSamples) {
 725             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE;
 726             fbo_incomplete("inconsistant number of samples", i);
 727             return;
 728          }
 729
 730       }
 731    }
 732
 733 #if FEATURE_GL
 734    if (ctx->API == API_OPENGL) {
 735       /* Check that all DrawBuffers are present */
 736       for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 737          if (fb->ColorDrawBuffer[j] != GL_NONE) {
 738             const struct gl_renderbuffer_attachment *att
 739                = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 740             assert(att);
 741             if (att->Type == GL_NONE) {
 742                fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 743                fbo_incomplete("missing drawbuffer", j);
 744                return;
 745             }
 746          }
 747       }
 748
 749       /* Check that the ReadBuffer is present */
 750       if (fb->ColorReadBuffer != GL_NONE) {
 751          const struct gl_renderbuffer_attachment *att
 752             = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 753          assert(att);
 754          if (att->Type == GL_NONE) {
 755             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 756             fbo_incomplete("missing readbuffer", -1);
 757             return;
 758          }
 759       }
 760    }
 761 #else
 762    (void) j;
 763 #endif
 764
 765    if (numImages == 0) {
 766       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 767       fbo_incomplete("no attachments", -1);
 768       return;
 769    }
 770
 771    /* Provisionally set status = COMPLETE ... */
 772    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 773
 774    /* ... but the driver may say the FB is incomplete.
 775     * Drivers will most likely set the status to GL_FRAMEBUFFER_UNSUPPORTED
 776     * if anything.
 777     */
 778    if (ctx->Driver.ValidateFramebuffer) {
 779       ctx->Driver.ValidateFramebuffer(ctx, fb);
 780       if (fb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
 781          fbo_incomplete("driver marked FBO as incomplete", -1);
 782       }
 783    }
 784
 785    if (fb->_Status == GL_FRAMEBUFFER_COMPLETE_EXT) {
 786       /*
 787        * Note that if ARB_framebuffer_object is supported and the attached
 788        * renderbuffers/textures are different sizes, the framebuffer
 789        * width/height will be set to the smallest width/height.
 790        */
 791       fb->Width = minWidth;
 792       fb->Height = minHeight;
 793
 794       /* finally, update the visual info for the framebuffer */
 795       _mesa_update_framebuffer_visual(ctx, fb);
 796    }
 797 }
 798
 799
 800 GLboolean GLAPIENTRY
 801 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 802 {
 803    GET_CURRENT_CONTEXT(ctx);
 804    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 805    if (renderbuffer) {
 806       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 807       if (rb != NULL && rb != &DummyRenderbuffer)
 808          return GL_TRUE;
 809    }
 810    return GL_FALSE;
 811 }
 812
 813
 814 void GLAPIENTRY
 815 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 816 {
 817    struct gl_renderbuffer *newRb;
 818    GET_CURRENT_CONTEXT(ctx);
 819
 820    ASSERT_OUTSIDE_BEGIN_END(ctx);
 821
 822    if (target != GL_RENDERBUFFER_EXT) {
 823       _mesa_error(ctx, GL_INVALID_ENUM, "glBindRenderbufferEXT(target)");
 824       return;
 825    }
 826
 827    /* No need to flush here since the render buffer binding has no
 828     * effect on rendering state.
 829     */
 830
 831    if (renderbuffer) {
 832       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 833       if (newRb == &DummyRenderbuffer) {
 834          /* ID was reserved, but no real renderbuffer object made yet */
 835          newRb = NULL;
 836       }
 837       else if (!newRb && ctx->Extensions.ARB_framebuffer_object) {
 838          /* All RB IDs must be Gen'd */
 839          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindRenderbuffer(buffer)");
 840          return;
 841       }
 842
 843       if (!newRb) {
 844          /* create new renderbuffer object */
 845          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 846          if (!newRb) {
 847             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 848             return;
 849          }
 850          ASSERT(newRb->AllocStorage);
 851          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 852          newRb->RefCount = 1; /* referenced by hash table */
 853       }
 854    }
 855    else {
 856       newRb = NULL;
 857    }
 858
 859    ASSERT(newRb != &DummyRenderbuffer);
 860
 861    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 862 }
 863
 864
 865 /**
 866  * If the given renderbuffer is anywhere attached to the framebuffer, detach
 867  * the renderbuffer.
 868  * This is used when a renderbuffer object is deleted.
 869  * The spec calls for unbinding.
 870  */
 871 static void
 872 detach_renderbuffer(struct gl_context *ctx,
 873                     struct gl_framebuffer *fb,
 874                     struct gl_renderbuffer *rb)
 875 {
 876    GLuint i;
 877    for (i = 0; i < BUFFER_COUNT; i++) {
 878       if (fb->Attachment[i].Renderbuffer == rb) {
 879          _mesa_remove_attachment(ctx, &fb->Attachment[i]);
 880       }
 881    }
 882    invalidate_framebuffer(fb);
 883 }
 884
 885
 886 void GLAPIENTRY
 887 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 888 {
 889    GLint i;
 890    GET_CURRENT_CONTEXT(ctx);
 891
 892    ASSERT_OUTSIDE_BEGIN_END(ctx);
 893    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 894
 895    for (i = 0; i < n; i++) {
 896       if (renderbuffers[i] > 0) {
 897          struct gl_renderbuffer *rb;
 898          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 899          if (rb) {
 900             /* check if deleting currently bound renderbuffer object */
 901             if (rb == ctx->CurrentRenderbuffer) {
 902                /* bind default */
 903                ASSERT(rb->RefCount >= 2);
 904                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 905             }
 906
 907             if (ctx->DrawBuffer->Name) {
 908                detach_renderbuffer(ctx, ctx->DrawBuffer, rb);
 909             }
 910             if (ctx->ReadBuffer->Name && ctx->ReadBuffer != ctx->DrawBuffer) {
 911                detach_renderbuffer(ctx, ctx->ReadBuffer, rb);
 912             }
 913
 914             /* Remove from hash table immediately, to free the ID.
 915              * But the object will not be freed until it's no longer
 916              * referenced anywhere else.
 917              */
 918             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 919
 920             if (rb != &DummyRenderbuffer) {
 921                /* no longer referenced by hash table */
 922                _mesa_reference_renderbuffer(&rb, NULL);
 923             }
 924          }
 925       }
 926    }
 927 }
 928
 929
 930 void GLAPIENTRY
 931 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 932 {
 933    GET_CURRENT_CONTEXT(ctx);
 934    GLuint first;
 935    GLint i;
 936
 937    ASSERT_OUTSIDE_BEGIN_END(ctx);
 938
 939    if (n < 0) {
 940       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 941       return;
 942    }
 943
 944    if (!renderbuffers)
 945       return;
 946
 947    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 948
 949    for (i = 0; i < n; i++) {
 950       GLuint name = first + i;
 951       renderbuffers[i] = name;
 952       /* insert dummy placeholder into hash table */
 953       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 954       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 955       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 956    }
 957 }
 958
 959
 960 /**
 961  * Given an internal format token for a render buffer, return the
 962  * corresponding base format.
 963  * This is very similar to _mesa_base_tex_format() but the set of valid
 964  * internal formats is somewhat different.
 965  *
 966  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 967  *  GL_DEPTH_STENCIL_EXT or zero if error.
 968  *
 969  * XXX in the future when we support red-only and red-green formats
 970  * we'll also return GL_RED and GL_RG.
 971  */
 972 GLenum
 973 _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
 974 {
 975    switch (internalFormat) {
 976    case GL_ALPHA:
 977    case GL_ALPHA4:
 978    case GL_ALPHA8:
 979    case GL_ALPHA12:
 980    case GL_ALPHA16:
 981       return GL_ALPHA;
 982    case GL_RGB:
 983    case GL_R3_G3_B2:
 984    case GL_RGB4:
 985    case GL_RGB5:
 986    case GL_RGB8:
 987    case GL_RGB10:
 988    case GL_RGB12:
 989    case GL_RGB16:
 990       return GL_RGB;
 991    case GL_RGBA:
 992    case GL_RGBA2:
 993    case GL_RGBA4:
 994    case GL_RGB5_A1:
 995    case GL_RGBA8:
 996    case GL_RGB10_A2:
 997    case GL_RGBA12:
 998    case GL_RGBA16:
 999    case GL_RGBA16_SNORM:
1000       return GL_RGBA;
1001    case GL_STENCIL_INDEX:
1002    case GL_STENCIL_INDEX1_EXT:
1003    case GL_STENCIL_INDEX4_EXT:
1004    case GL_STENCIL_INDEX8_EXT:
1005    case GL_STENCIL_INDEX16_EXT:
1006       return GL_STENCIL_INDEX;
1007    case GL_DEPTH_COMPONENT:
1008    case GL_DEPTH_COMPONENT16:
1009    case GL_DEPTH_COMPONENT24:
1010    case GL_DEPTH_COMPONENT32:
1011       return GL_DEPTH_COMPONENT;
1012    case GL_DEPTH_STENCIL_EXT:
1013    case GL_DEPTH24_STENCIL8_EXT:
1014       if (ctx->Extensions.EXT_packed_depth_stencil)
1015          return GL_DEPTH_STENCIL_EXT;
1016       else
1017          return 0;
1018    /* XXX add floating point formats eventually */
1019    default:
1020       return 0;
1021    }
1022 }
1023
1024
1025 /** sentinal value, see below */
1026 #define NO_SAMPLES 1000
1027
1028
1029 /**
1030  * Helper function used by _mesa_RenderbufferStorageEXT() and
1031  * _mesa_RenderbufferStorageMultisample().
1032  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
1033  */
1034 static void
1035 renderbuffer_storage(GLenum target, GLenum internalFormat,
1036                      GLsizei width, GLsizei height, GLsizei samples)
1037 {
1038    const char *func = samples == NO_SAMPLES ?
1039       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
1040    struct gl_renderbuffer *rb;
1041    GLenum baseFormat;
1042    GET_CURRENT_CONTEXT(ctx);
1043
1044    ASSERT_OUTSIDE_BEGIN_END(ctx);
1045
1046    if (target != GL_RENDERBUFFER_EXT) {
1047       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
1048       return;
1049    }
1050
1051    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
1052    if (baseFormat == 0) {
1053       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
1054       return;
1055    }
1056
1057    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1058       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
1059       return;
1060    }
1061
1062    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
1063       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
1064       return;
1065    }
1066
1067    if (samples == NO_SAMPLES) {
1068       /* NumSamples == 0 indicates non-multisampling */
1069       samples = 0;
1070    }
1071    else if (samples > (GLsizei) ctx->Const.MaxSamples) {
1072       /* note: driver may choose to use more samples than what's requested */
1073       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
1074       return;
1075    }
1076
1077    rb = ctx->CurrentRenderbuffer;
1078    if (!rb) {
1079       _mesa_error(ctx, GL_INVALID_OPERATION, "%s", func);
1080       return;
1081    }
1082
1083    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1084
1085    if (rb->InternalFormat == internalFormat &&
1086        rb->Width == (GLuint) width &&
1087        rb->Height == (GLuint) height) {
1088       /* no change in allocation needed */
1089       return;
1090    }
1091
1092    /* These MUST get set by the AllocStorage func */
1093    rb->Format = MESA_FORMAT_NONE;
1094    rb->NumSamples = samples;
1095
1096    /* Now allocate the storage */
1097    ASSERT(rb->AllocStorage);
1098    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
1099       /* No error - check/set fields now */
1100       assert(rb->Format != MESA_FORMAT_NONE);
1101       assert(rb->Width == (GLuint) width);
1102       assert(rb->Height == (GLuint) height);
1103       rb->InternalFormat = internalFormat;
1104       rb->_BaseFormat = baseFormat;
1105       assert(rb->_BaseFormat != 0);
1106    }
1107    else {
1108       /* Probably ran out of memory - clear the fields */
1109       rb->Width = 0;
1110       rb->Height = 0;
1111       rb->Format = MESA_FORMAT_NONE;
1112       rb->InternalFormat = GL_NONE;
1113       rb->_BaseFormat = GL_NONE;
1114       rb->NumSamples = 0;
1115    }
1116
1117    /*
1118    test_framebuffer_completeness(ctx, fb);
1119    */
1120    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1121     * points???
1122     */
1123 }
1124
1125
1126 #if FEATURE_OES_EGL_image
1127 void GLAPIENTRY
1128 _mesa_EGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
1129 {
1130    struct gl_renderbuffer *rb;
1131    GET_CURRENT_CONTEXT(ctx);
1132    ASSERT_OUTSIDE_BEGIN_END(ctx);
1133
1134    if (!ctx->Extensions.OES_EGL_image) {
1135       _mesa_error(ctx, GL_INVALID_OPERATION,
1136                   "glEGLImageTargetRenderbufferStorageOES(unsupported)");
1137       return;
1138    }
1139
1140    if (target != GL_RENDERBUFFER) {
1141       _mesa_error(ctx, GL_INVALID_ENUM,
1142                   "EGLImageTargetRenderbufferStorageOES");
1143       return;
1144    }
1145
1146    rb = ctx->CurrentRenderbuffer;
1147    if (!rb) {
1148       _mesa_error(ctx, GL_INVALID_OPERATION,
1149                   "EGLImageTargetRenderbufferStorageOES");
1150       return;
1151    }
1152
1153    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1154
1155    ctx->Driver.EGLImageTargetRenderbufferStorage(ctx, rb, image);
1156 }
1157 #endif
1158
1159
1160 /**
1161  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1162  * _mesa_GetFramebufferAttachmentParameterivEXT()
1163  * We have to be careful to respect the base format.  For example, if a
1164  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1165  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1166  * we need to return zero.
1167  */
1168 static GLint
1169 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1170 {
1171    switch (pname) {
1172    case GL_RENDERBUFFER_RED_SIZE_EXT:
1173    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1174       if (baseFormat == GL_RGB || baseFormat == GL_RGBA ||
1175           baseFormat == GL_RG || baseFormat == GL_RED)
1176          return _mesa_get_format_bits(format, pname);
1177       else
1178          return 0;
1179    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1180    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1181       if (baseFormat == GL_RGB || baseFormat == GL_RGBA || baseFormat == GL_RG)
1182          return _mesa_get_format_bits(format, pname);
1183       else
1184          return 0;
1185    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1186    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1187       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1188          return _mesa_get_format_bits(format, pname);
1189       else
1190          return 0;
1191    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1192    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1193       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA ||
1194           baseFormat == GL_LUMINANCE_ALPHA)
1195          return _mesa_get_format_bits(format, pname);
1196       else
1197          return 0;
1198    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1199    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1200       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1201          return _mesa_get_format_bits(format, pname);
1202       else
1203          return 0;
1204    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1205    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1206       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1207          return _mesa_get_format_bits(format, pname);
1208       else
1209          return 0;
1210    default:
1211       return 0;
1212    }
1213 }
1214
1215
1216
1217 void GLAPIENTRY
1218 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1219                              GLsizei width, GLsizei height)
1220 {
1221    /* GL_ARB_fbo says calling this function is equivalent to calling
1222     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1223     * a token value here just for error reporting purposes.
1224     */
1225    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1226 }
1227
1228
1229 void GLAPIENTRY
1230 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1231                                      GLenum internalFormat,
1232                                      GLsizei width, GLsizei height)
1233 {
1234    renderbuffer_storage(target, internalFormat, width, height, samples);
1235 }
1236
1237
1238 /**
1239  * OpenGL ES version of glRenderBufferStorage.
1240  */
1241 void GLAPIENTRY
1242 _es_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1243                            GLsizei width, GLsizei height)
1244 {
1245    switch (internalFormat) {
1246    case GL_RGB565:
1247       /* XXX this confuses GL_RENDERBUFFER_INTERNAL_FORMAT_OES */
1248       /* choose a closest format */
1249       internalFormat = GL_RGB5;
1250       break;
1251    default:
1252       break;
1253    }
1254
1255    renderbuffer_storage(target, internalFormat, width, height, 0);
1256 }
1257
1258
1259 void GLAPIENTRY
1260 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1261 {
1262    struct gl_renderbuffer *rb;
1263    GET_CURRENT_CONTEXT(ctx);
1264
1265    ASSERT_OUTSIDE_BEGIN_END(ctx);
1266
1267    if (target != GL_RENDERBUFFER_EXT) {
1268       _mesa_error(ctx, GL_INVALID_ENUM,
1269                   "glGetRenderbufferParameterivEXT(target)");
1270       return;
1271    }
1272
1273    rb = ctx->CurrentRenderbuffer;
1274    if (!rb) {
1275       _mesa_error(ctx, GL_INVALID_OPERATION,
1276                   "glGetRenderbufferParameterivEXT");
1277       return;
1278    }
1279
1280    /* No need to flush here since we're just quering state which is
1281     * not effected by rendering.
1282     */
1283
1284    switch (pname) {
1285    case GL_RENDERBUFFER_WIDTH_EXT:
1286       *params = rb->Width;
1287       return;
1288    case GL_RENDERBUFFER_HEIGHT_EXT:
1289       *params = rb->Height;
1290       return;
1291    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1292       *params = rb->InternalFormat;
1293       return;
1294    case GL_RENDERBUFFER_RED_SIZE_EXT:
1295    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1296    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1297    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1298    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1299    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1300       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1301       break;
1302    case GL_RENDERBUFFER_SAMPLES:
1303       if (ctx->Extensions.ARB_framebuffer_object) {
1304          *params = rb->NumSamples;
1305          break;
1306       }
1307       /* fallthrough */
1308    default:
1309       _mesa_error(ctx, GL_INVALID_ENUM,
1310                   "glGetRenderbufferParameterivEXT(target)");
1311       return;
1312    }
1313 }
1314
1315
1316 GLboolean GLAPIENTRY
1317 _mesa_IsFramebufferEXT(GLuint framebuffer)
1318 {
1319    GET_CURRENT_CONTEXT(ctx);
1320    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1321    if (framebuffer) {
1322       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1323       if (rb != NULL && rb != &DummyFramebuffer)
1324          return GL_TRUE;
1325    }
1326    return GL_FALSE;
1327 }
1328
1329
1330 /**
1331  * Check if any of the attachments of the given framebuffer are textures
1332  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1333  * attachments.
1334  */
1335 static void
1336 check_begin_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1337 {
1338    GLuint i;
1339    ASSERT(ctx->Driver.RenderTexture);
1340
1341    if (fb->Name == 0)
1342       return; /* can't render to texture with winsys framebuffers */
1343
1344    for (i = 0; i < BUFFER_COUNT; i++) {
1345       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1346       struct gl_texture_object *texObj = att->Texture;
1347       if (texObj
1348           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1349          ctx->Driver.RenderTexture(ctx, fb, att);
1350       }
1351    }
1352 }
1353
1354
1355 /**
1356  * Examine all the framebuffer's attachments to see if any are textures.
1357  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1358  * notify the device driver that the texture image may have changed.
1359  */
1360 static void
1361 check_end_texture_render(struct gl_context *ctx, struct gl_framebuffer *fb)
1362 {
1363    if (fb->Name == 0)
1364       return; /* can't render to texture with winsys framebuffers */
1365
1366    if (ctx->Driver.FinishRenderTexture) {
1367       GLuint i;
1368       for (i = 0; i < BUFFER_COUNT; i++) {
1369          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1370          if (att->Texture && att->Renderbuffer) {
1371             ctx->Driver.FinishRenderTexture(ctx, att);
1372          }
1373       }
1374    }
1375 }
1376
1377
1378 void GLAPIENTRY
1379 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1380 {
1381    struct gl_framebuffer *newDrawFb, *newReadFb;
1382    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1383    GLboolean bindReadBuf, bindDrawBuf;
1384    GET_CURRENT_CONTEXT(ctx);
1385
1386 #ifdef DEBUG
1387    if (ctx->Extensions.ARB_framebuffer_object) {
1388       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1389       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1390    }
1391 #endif
1392
1393    ASSERT_OUTSIDE_BEGIN_END(ctx);
1394
1395    if (!ctx->Extensions.EXT_framebuffer_object) {
1396       _mesa_error(ctx, GL_INVALID_OPERATION,
1397                   "glBindFramebufferEXT(unsupported)");
1398       return;
1399    }
1400
1401    switch (target) {
1402 #if FEATURE_EXT_framebuffer_blit
1403    case GL_DRAW_FRAMEBUFFER_EXT:
1404       if (!ctx->Extensions.EXT_framebuffer_blit) {
1405          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1406          return;
1407       }
1408       bindDrawBuf = GL_TRUE;
1409       bindReadBuf = GL_FALSE;
1410       break;
1411    case GL_READ_FRAMEBUFFER_EXT:
1412       if (!ctx->Extensions.EXT_framebuffer_blit) {
1413          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1414          return;
1415       }
1416       bindDrawBuf = GL_FALSE;
1417       bindReadBuf = GL_TRUE;
1418       break;
1419 #endif
1420    case GL_FRAMEBUFFER_EXT:
1421       bindDrawBuf = GL_TRUE;
1422       bindReadBuf = GL_TRUE;
1423       break;
1424    default:
1425       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1426       return;
1427    }
1428
1429    if (framebuffer) {
1430       /* Binding a user-created framebuffer object */
1431       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1432       if (newDrawFb == &DummyFramebuffer) {
1433          /* ID was reserved, but no real framebuffer object made yet */
1434          newDrawFb = NULL;
1435       }
1436       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1437          /* All FBO IDs must be Gen'd */
1438          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1439          return;
1440       }
1441
1442       if (!newDrawFb) {
1443          /* create new framebuffer object */
1444          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1445          if (!newDrawFb) {
1446             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1447             return;
1448          }
1449          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1450       }
1451       newReadFb = newDrawFb;
1452    }
1453    else {
1454       /* Binding the window system framebuffer (which was originally set
1455        * with MakeCurrent).
1456        */
1457       newDrawFb = ctx->WinSysDrawBuffer;
1458       newReadFb = ctx->WinSysReadBuffer;
1459    }
1460
1461    ASSERT(newDrawFb);
1462    ASSERT(newDrawFb != &DummyFramebuffer);
1463
1464    /* save pointers to current/old framebuffers */
1465    oldDrawFb = ctx->DrawBuffer;
1466    oldReadFb = ctx->ReadBuffer;
1467
1468    /* check if really changing bindings */
1469    if (oldDrawFb == newDrawFb)
1470       bindDrawBuf = GL_FALSE;
1471    if (oldReadFb == newReadFb)
1472       bindReadBuf = GL_FALSE;
1473
1474    /*
1475     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1476     *
1477     * We also check if we're beginning and/or ending render-to-texture.
1478     * When a framebuffer with texture attachments is unbound, call
1479     * ctx->Driver.FinishRenderTexture().
1480     * When a framebuffer with texture attachments is bound, call
1481     * ctx->Driver.RenderTexture().
1482     *
1483     * Note that if the ReadBuffer has texture attachments we don't consider
1484     * that a render-to-texture case.
1485     */
1486    if (bindReadBuf) {
1487       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1488
1489       /* check if old readbuffer was render-to-texture */
1490       check_end_texture_render(ctx, oldReadFb);
1491
1492       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1493    }
1494
1495    if (bindDrawBuf) {
1496       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1497
1498       /* check if old read/draw buffers were render-to-texture */
1499       if (!bindReadBuf)
1500          check_end_texture_render(ctx, oldReadFb);
1501
1502       if (oldDrawFb != oldReadFb)
1503          check_end_texture_render(ctx, oldDrawFb);
1504
1505       /* check if newly bound framebuffer has any texture attachments */
1506       check_begin_texture_render(ctx, newDrawFb);
1507
1508       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1509    }
1510
1511    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1512       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1513    }
1514 }
1515
1516
1517 void GLAPIENTRY
1518 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1519 {
1520    GLint i;
1521    GET_CURRENT_CONTEXT(ctx);
1522
1523    ASSERT_OUTSIDE_BEGIN_END(ctx);
1524    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1525
1526    for (i = 0; i < n; i++) {
1527       if (framebuffers[i] > 0) {
1528          struct gl_framebuffer *fb;
1529          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1530          if (fb) {
1531             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1532
1533             /* check if deleting currently bound framebuffer object */
1534             if (ctx->Extensions.EXT_framebuffer_blit) {
1535                /* separate draw/read binding points */
1536                if (fb == ctx->DrawBuffer) {
1537                   /* bind default */
1538                   ASSERT(fb->RefCount >= 2);
1539                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1540                }
1541                if (fb == ctx->ReadBuffer) {
1542                   /* bind default */
1543                   ASSERT(fb->RefCount >= 2);
1544                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1545                }
1546             }
1547             else {
1548                /* only one binding point for read/draw buffers */
1549                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1550                   /* bind default */
1551                   ASSERT(fb->RefCount >= 2);
1552                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1553                }
1554             }
1555
1556             /* remove from hash table immediately, to free the ID */
1557             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1558
1559             if (fb != &DummyFramebuffer) {
1560                /* But the object will not be freed until it's no longer
1561                 * bound in any context.
1562                 */
1563                _mesa_reference_framebuffer(&fb, NULL);
1564             }
1565          }
1566       }
1567    }
1568 }
1569
1570
1571 void GLAPIENTRY
1572 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1573 {
1574    GET_CURRENT_CONTEXT(ctx);
1575    GLuint first;
1576    GLint i;
1577
1578    ASSERT_OUTSIDE_BEGIN_END(ctx);
1579
1580    if (n < 0) {
1581       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1582       return;
1583    }
1584
1585    if (!framebuffers)
1586       return;
1587
1588    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1589
1590    for (i = 0; i < n; i++) {
1591       GLuint name = first + i;
1592       framebuffers[i] = name;
1593       /* insert dummy placeholder into hash table */
1594       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1595       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1596       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1597    }
1598 }
1599
1600
1601
1602 GLenum GLAPIENTRY
1603 _mesa_CheckFramebufferStatusEXT(GLenum target)
1604 {
1605    struct gl_framebuffer *buffer;
1606    GET_CURRENT_CONTEXT(ctx);
1607
1608    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1609
1610    switch (target) {
1611 #if FEATURE_EXT_framebuffer_blit
1612    case GL_DRAW_FRAMEBUFFER_EXT:
1613       if (!ctx->Extensions.EXT_framebuffer_blit) {
1614          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1615          return 0;
1616       }
1617       buffer = ctx->DrawBuffer;
1618       break;
1619    case GL_READ_FRAMEBUFFER_EXT:
1620       if (!ctx->Extensions.EXT_framebuffer_blit) {
1621          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1622          return 0;
1623       }
1624       buffer = ctx->ReadBuffer;
1625       break;
1626 #endif
1627    case GL_FRAMEBUFFER_EXT:
1628       buffer = ctx->DrawBuffer;
1629       break;
1630    default:
1631       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1632       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1633    }
1634
1635    if (buffer->Name == 0) {
1636       /* The window system / default framebuffer is always complete */
1637       return GL_FRAMEBUFFER_COMPLETE_EXT;
1638    }
1639
1640    /* No need to flush here */
1641
1642    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1643       _mesa_test_framebuffer_completeness(ctx, buffer);
1644    }
1645
1646    return buffer->_Status;
1647 }
1648
1649
1650
1651 /**
1652  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1653  */
1654 static void
1655 framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
1656                     GLenum attachment, GLenum textarget, GLuint texture,
1657                     GLint level, GLint zoffset)
1658 {
1659    struct gl_renderbuffer_attachment *att;
1660    struct gl_texture_object *texObj = NULL;
1661    struct gl_framebuffer *fb;
1662    GLboolean error = GL_FALSE;
1663
1664    ASSERT_OUTSIDE_BEGIN_END(ctx);
1665
1666    switch (target) {
1667    case GL_READ_FRAMEBUFFER_EXT:
1668       error = !ctx->Extensions.EXT_framebuffer_blit;
1669       fb = ctx->ReadBuffer;
1670       break;
1671    case GL_DRAW_FRAMEBUFFER_EXT:
1672       error = !ctx->Extensions.EXT_framebuffer_blit;
1673       /* fall-through */
1674    case GL_FRAMEBUFFER_EXT:
1675       fb = ctx->DrawBuffer;
1676       break;
1677    default:
1678       error = GL_TRUE;
1679    }
1680
1681    if (error) {
1682       _mesa_error(ctx, GL_INVALID_ENUM,
1683                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1684       return;
1685    }
1686
1687    ASSERT(fb);
1688
1689    /* check framebuffer binding */
1690    if (fb->Name == 0) {
1691       _mesa_error(ctx, GL_INVALID_OPERATION,
1692                   "glFramebufferTexture%sEXT", caller);
1693       return;
1694    }
1695
1696
1697    /* The textarget, level, and zoffset parameters are only validated if
1698     * texture is non-zero.
1699     */
1700    if (texture) {
1701       GLboolean err = GL_TRUE;
1702
1703       texObj = _mesa_lookup_texture(ctx, texture);
1704       if (texObj != NULL) {
1705          if (textarget == 0) {
1706             /* XXX what's the purpose of this? */
1707             err = (texObj->Target != GL_TEXTURE_3D) &&
1708                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1709                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1710          }
1711          else {
1712             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1713                 ? !IS_CUBE_FACE(textarget)
1714                 : (texObj->Target != textarget);
1715          }
1716       }
1717       else {
1718          /* can't render to a non-existant texture */
1719          _mesa_error(ctx, GL_INVALID_OPERATION,
1720                      "glFramebufferTexture%sEXT(non existant texture)",
1721                      caller);
1722          return;
1723       }
1724
1725       if (err) {
1726          _mesa_error(ctx, GL_INVALID_OPERATION,
1727                      "glFramebufferTexture%sEXT(texture target mismatch)",
1728                      caller);
1729          return;
1730       }
1731
1732       if (texObj->Target == GL_TEXTURE_3D) {
1733          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1734          if (zoffset < 0 || zoffset >= maxSize) {
1735             _mesa_error(ctx, GL_INVALID_VALUE,
1736                         "glFramebufferTexture%sEXT(zoffset)", caller);
1737             return;
1738          }
1739       }
1740       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1741                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1742          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1743             _mesa_error(ctx, GL_INVALID_VALUE,
1744                         "glFramebufferTexture%sEXT(layer)", caller);
1745             return;
1746          }
1747       }
1748
1749       if ((level < 0) ||
1750           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1751          _mesa_error(ctx, GL_INVALID_VALUE,
1752                      "glFramebufferTexture%sEXT(level)", caller);
1753          return;
1754       }
1755    }
1756
1757    att = _mesa_get_attachment(ctx, fb, attachment);
1758    if (att == NULL) {
1759       _mesa_error(ctx, GL_INVALID_ENUM,
1760                   "glFramebufferTexture%sEXT(attachment)", caller);
1761       return;
1762    }
1763
1764    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1765
1766    _glthread_LOCK_MUTEX(fb->Mutex);
1767    if (texObj) {
1768       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1769                                    level, zoffset);
1770       /* Set the render-to-texture flag.  We'll check this flag in
1771        * glTexImage() and friends to determine if we need to revalidate
1772        * any FBOs that might be rendering into this texture.
1773        * This flag never gets cleared since it's non-trivial to determine
1774        * when all FBOs might be done rendering to this texture.  That's OK
1775        * though since it's uncommon to render to a texture then repeatedly
1776        * call glTexImage() to change images in the texture.
1777        */
1778       texObj->_RenderToTexture = GL_TRUE;
1779    }
1780    else {
1781       _mesa_remove_attachment(ctx, att);
1782    }
1783
1784    invalidate_framebuffer(fb);
1785
1786    _glthread_UNLOCK_MUTEX(fb->Mutex);
1787 }
1788
1789
1790
1791 void GLAPIENTRY
1792 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1793                               GLenum textarget, GLuint texture, GLint level)
1794 {
1795    GET_CURRENT_CONTEXT(ctx);
1796
1797    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1798       _mesa_error(ctx, GL_INVALID_ENUM,
1799                   "glFramebufferTexture1DEXT(textarget)");
1800       return;
1801    }
1802
1803    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1804                        level, 0);
1805 }
1806
1807
1808 void GLAPIENTRY
1809 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1810                               GLenum textarget, GLuint texture, GLint level)
1811 {
1812    GET_CURRENT_CONTEXT(ctx);
1813
1814    if ((texture != 0) &&
1815        (textarget != GL_TEXTURE_2D) &&
1816        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1817        (!IS_CUBE_FACE(textarget))) {
1818       _mesa_error(ctx, GL_INVALID_OPERATION,
1819                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1820       return;
1821    }
1822
1823    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1824                        level, 0);
1825 }
1826
1827
1828 void GLAPIENTRY
1829 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1830                               GLenum textarget, GLuint texture,
1831                               GLint level, GLint zoffset)
1832 {
1833    GET_CURRENT_CONTEXT(ctx);
1834
1835    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1836       _mesa_error(ctx, GL_INVALID_ENUM,
1837                   "glFramebufferTexture3DEXT(textarget)");
1838       return;
1839    }
1840
1841    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1842                        level, zoffset);
1843 }
1844
1845
1846 void GLAPIENTRY
1847 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1848                                  GLuint texture, GLint level, GLint layer)
1849 {
1850    GET_CURRENT_CONTEXT(ctx);
1851
1852    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1853                        level, layer);
1854 }
1855
1856
1857 void GLAPIENTRY
1858 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1859                                  GLenum renderbufferTarget,
1860                                  GLuint renderbuffer)
1861 {
1862    struct gl_renderbuffer_attachment *att;
1863    struct gl_framebuffer *fb;
1864    struct gl_renderbuffer *rb;
1865    GET_CURRENT_CONTEXT(ctx);
1866
1867    ASSERT_OUTSIDE_BEGIN_END(ctx);
1868
1869    switch (target) {
1870 #if FEATURE_EXT_framebuffer_blit
1871    case GL_DRAW_FRAMEBUFFER_EXT:
1872       if (!ctx->Extensions.EXT_framebuffer_blit) {
1873          _mesa_error(ctx, GL_INVALID_ENUM,
1874                      "glFramebufferRenderbufferEXT(target)");
1875          return;
1876       }
1877       fb = ctx->DrawBuffer;
1878       break;
1879    case GL_READ_FRAMEBUFFER_EXT:
1880       if (!ctx->Extensions.EXT_framebuffer_blit) {
1881          _mesa_error(ctx, GL_INVALID_ENUM,
1882                      "glFramebufferRenderbufferEXT(target)");
1883          return;
1884       }
1885       fb = ctx->ReadBuffer;
1886       break;
1887 #endif
1888    case GL_FRAMEBUFFER_EXT:
1889       fb = ctx->DrawBuffer;
1890       break;
1891    default:
1892       _mesa_error(ctx, GL_INVALID_ENUM,
1893                   "glFramebufferRenderbufferEXT(target)");
1894       return;
1895    }
1896
1897    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1898       _mesa_error(ctx, GL_INVALID_ENUM,
1899                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1900       return;
1901    }
1902
1903    if (fb->Name == 0) {
1904       /* Can't attach new renderbuffers to a window system framebuffer */
1905       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1906       return;
1907    }
1908
1909    att = _mesa_get_attachment(ctx, fb, attachment);
1910    if (att == NULL) {
1911       _mesa_error(ctx, GL_INVALID_ENUM,
1912                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1913                   _mesa_lookup_enum_by_nr(attachment));
1914       return;
1915    }
1916
1917    if (renderbuffer) {
1918       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1919       if (!rb) {
1920          _mesa_error(ctx, GL_INVALID_OPERATION,
1921                      "glFramebufferRenderbufferEXT(non-existant"
1922                      " renderbuffer %u)", renderbuffer);
1923          return;
1924       }
1925    }
1926    else {
1927       /* remove renderbuffer attachment */
1928       rb = NULL;
1929    }
1930
1931    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT &&
1932        rb && rb->Format != MESA_FORMAT_NONE) {
1933       /* make sure the renderbuffer is a depth/stencil format */
1934       const GLenum baseFormat = _mesa_get_format_base_format(rb->Format);
1935       if (baseFormat != GL_DEPTH_STENCIL) {
1936          _mesa_error(ctx, GL_INVALID_OPERATION,
1937                      "glFramebufferRenderbufferEXT(renderbuffer"
1938                      " is not DEPTH_STENCIL format)");
1939          return;
1940       }
1941    }
1942
1943
1944    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1945
1946    assert(ctx->Driver.FramebufferRenderbuffer);
1947    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1948
1949    /* Some subsequent GL commands may depend on the framebuffer's visual
1950     * after the binding is updated.  Update visual info now.
1951     */
1952    _mesa_update_framebuffer_visual(ctx, fb);
1953 }
1954
1955
1956 void GLAPIENTRY
1957 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1958                                              GLenum pname, GLint *params)
1959 {
1960    const struct gl_renderbuffer_attachment *att;
1961    struct gl_framebuffer *buffer;
1962    GET_CURRENT_CONTEXT(ctx);
1963
1964    ASSERT_OUTSIDE_BEGIN_END(ctx);
1965
1966    switch (target) {
1967 #if FEATURE_EXT_framebuffer_blit
1968    case GL_DRAW_FRAMEBUFFER_EXT:
1969       if (!ctx->Extensions.EXT_framebuffer_blit) {
1970          _mesa_error(ctx, GL_INVALID_ENUM,
1971                      "glGetFramebufferAttachmentParameterivEXT(target)");
1972          return;
1973       }
1974       buffer = ctx->DrawBuffer;
1975       break;
1976    case GL_READ_FRAMEBUFFER_EXT:
1977       if (!ctx->Extensions.EXT_framebuffer_blit) {
1978          _mesa_error(ctx, GL_INVALID_ENUM,
1979                      "glGetFramebufferAttachmentParameterivEXT(target)");
1980          return;
1981       }
1982       buffer = ctx->ReadBuffer;
1983       break;
1984 #endif
1985    case GL_FRAMEBUFFER_EXT:
1986       buffer = ctx->DrawBuffer;
1987       break;
1988    default:
1989       _mesa_error(ctx, GL_INVALID_ENUM,
1990                   "glGetFramebufferAttachmentParameterivEXT(target)");
1991       return;
1992    }
1993
1994    if (buffer->Name == 0) {
1995       /* the default / window-system FBO */
1996       att = _mesa_get_fb0_attachment(ctx, buffer, attachment);
1997    }
1998    else {
1999       /* user-created framebuffer FBO */
2000       att = _mesa_get_attachment(ctx, buffer, attachment);
2001    }
2002
2003    if (att == NULL) {
2004       _mesa_error(ctx, GL_INVALID_ENUM,
2005                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
2006       return;
2007    }
2008
2009    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
2010       /* the depth and stencil attachments must point to the same buffer */
2011       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
2012       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
2013       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
2014       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
2015          _mesa_error(ctx, GL_INVALID_OPERATION,
2016                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
2017                      " attachments differ)");
2018          return;
2019       }
2020    }
2021
2022    /* No need to flush here */
2023
2024    switch (pname) {
2025    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
2026       *params = buffer->Name == 0 ? GL_FRAMEBUFFER_DEFAULT : att->Type;
2027       return;
2028    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
2029       if (att->Type == GL_RENDERBUFFER_EXT) {
2030          *params = att->Renderbuffer->Name;
2031       }
2032       else if (att->Type == GL_TEXTURE) {
2033          *params = att->Texture->Name;
2034       }
2035       else {
2036          assert(att->Type == GL_NONE);
2037          *params = 0;
2038       }
2039       return;
2040    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
2041       if (att->Type == GL_TEXTURE) {
2042          *params = att->TextureLevel;
2043       }
2044       else {
2045          _mesa_error(ctx, GL_INVALID_ENUM,
2046                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2047       }
2048       return;
2049    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
2050       if (att->Type == GL_TEXTURE) {
2051          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
2052             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
2053          }
2054          else {
2055             *params = 0;
2056          }
2057       }
2058       else {
2059          _mesa_error(ctx, GL_INVALID_ENUM,
2060                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2061       }
2062       return;
2063    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
2064       if (att->Type == GL_TEXTURE) {
2065          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
2066             *params = att->Zoffset;
2067          }
2068          else {
2069             *params = 0;
2070          }
2071       }
2072       else {
2073          _mesa_error(ctx, GL_INVALID_ENUM,
2074                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2075       }
2076       return;
2077    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
2078       if (!ctx->Extensions.ARB_framebuffer_object) {
2079          _mesa_error(ctx, GL_INVALID_ENUM,
2080                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2081       }
2082       else {
2083          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
2084       }
2085       return;
2086    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
2087       if (!ctx->Extensions.ARB_framebuffer_object) {
2088          _mesa_error(ctx, GL_INVALID_ENUM,
2089                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2090          return;
2091       }
2092       else {
2093          gl_format format = att->Renderbuffer->Format;
2094          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
2095             /* special cases */
2096             *params = GL_INDEX;
2097          }
2098          else {
2099             *params = _mesa_get_format_datatype(format);
2100          }
2101       }
2102       return;
2103    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
2104    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
2105    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
2106    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
2107    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
2108    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
2109       if (!ctx->Extensions.ARB_framebuffer_object) {
2110          _mesa_error(ctx, GL_INVALID_ENUM,
2111                      "glGetFramebufferAttachmentParameterivEXT(pname)");
2112       }
2113       else if (att->Texture) {
2114          const struct gl_texture_image *texImage =
2115             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
2116                                    att->TextureLevel);
2117          if (texImage) {
2118             *params = get_component_bits(pname, texImage->_BaseFormat,
2119                                          texImage->TexFormat);
2120          }
2121          else {
2122             *params = 0;
2123          }
2124       }
2125       else if (att->Renderbuffer) {
2126          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
2127                                       att->Renderbuffer->Format);
2128       }
2129       else {
2130          *params = 0;
2131       }
2132       return;
2133    default:
2134       _mesa_error(ctx, GL_INVALID_ENUM,
2135                   "glGetFramebufferAttachmentParameterivEXT(pname)");
2136       return;
2137    }
2138 }
2139
2140
2141 void GLAPIENTRY
2142 _mesa_GenerateMipmapEXT(GLenum target)
2143 {
2144    struct gl_texture_object *texObj;
2145    GET_CURRENT_CONTEXT(ctx);
2146
2147    ASSERT_OUTSIDE_BEGIN_END(ctx);
2148    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2149
2150    switch (target) {
2151    case GL_TEXTURE_1D:
2152    case GL_TEXTURE_2D:
2153    case GL_TEXTURE_3D:
2154    case GL_TEXTURE_CUBE_MAP:
2155       /* OK, legal value */
2156       break;
2157    default:
2158       /* XXX need to implement GL_TEXTURE_1D_ARRAY and GL_TEXTURE_2D_ARRAY */
2159       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
2160       return;
2161    }
2162
2163    texObj = _mesa_get_current_tex_object(ctx, target);
2164
2165    if (texObj->BaseLevel >= texObj->MaxLevel) {
2166       /* nothing to do */
2167       return;
2168    }
2169
2170    if (texObj->Target == GL_TEXTURE_CUBE_MAP &&
2171        !_mesa_cube_complete(texObj)) {
2172       _mesa_error(ctx, GL_INVALID_OPERATION,
2173                   "glGenerateMipmap(incomplete cube map)");
2174       return;
2175    }
2176
2177    _mesa_lock_texture(ctx, texObj);
2178    if (target == GL_TEXTURE_CUBE_MAP) {
2179       GLuint face;
2180       for (face = 0; face < 6; face++)
2181          ctx->Driver.GenerateMipmap(ctx,
2182                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
2183                                     texObj);
2184    }
2185    else {
2186       ctx->Driver.GenerateMipmap(ctx, target, texObj);
2187    }
2188    _mesa_unlock_texture(ctx, texObj);
2189 }
2190
2191
2192 #if FEATURE_EXT_framebuffer_blit
2193
2194 static const struct gl_renderbuffer_attachment *
2195 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
2196 {
2197    GLuint i;
2198    for (i = 0; i < Elements(fb->Attachment); i++) {
2199       if (fb->Attachment[i].Renderbuffer == rb)
2200          return &fb->Attachment[i];
2201    }
2202    return NULL;
2203 }
2204
2205
2206
2207 /**
2208  * Blit rectangular region, optionally from one framebuffer to another.
2209  *
2210  * Note, if the src buffer is multisampled and the dest is not, this is
2211  * when the samples must be resolved to a single color.
2212  */
2213 void GLAPIENTRY
2214 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2215                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2216                          GLbitfield mask, GLenum filter)
2217 {
2218    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2219                                      GL_DEPTH_BUFFER_BIT |
2220                                      GL_STENCIL_BUFFER_BIT);
2221    const struct gl_framebuffer *readFb, *drawFb;
2222    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2223    GET_CURRENT_CONTEXT(ctx);
2224
2225    ASSERT_OUTSIDE_BEGIN_END(ctx);
2226    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2227
2228    if (ctx->NewState) {
2229       _mesa_update_state(ctx);
2230    }
2231
2232    readFb = ctx->ReadBuffer;
2233    drawFb = ctx->DrawBuffer;
2234
2235    if (!readFb || !drawFb) {
2236       /* This will normally never happen but someday we may want to
2237        * support MakeCurrent() with no drawables.
2238        */
2239       return;
2240    }
2241
2242    /* check for complete framebuffers */
2243    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2244        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2245       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2246                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2247       return;
2248    }
2249
2250    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2251       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2252       return;
2253    }
2254
2255    if (mask & ~legalMaskBits) {
2256       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2257       return;
2258    }
2259
2260    /* depth/stencil must be blitted with nearest filtering */
2261    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2262         && filter != GL_NEAREST) {
2263       _mesa_error(ctx, GL_INVALID_OPERATION,
2264              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2265       return;
2266    }
2267
2268    /* get color read/draw renderbuffers */
2269    if (mask & GL_COLOR_BUFFER_BIT) {
2270       colorReadRb = readFb->_ColorReadBuffer;
2271       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2272    }
2273    else {
2274       colorReadRb = colorDrawRb = NULL;
2275    }
2276
2277    if (mask & GL_STENCIL_BUFFER_BIT) {
2278       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2279       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2280       if (!readRb ||
2281           !drawRb ||
2282           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2283           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2284          _mesa_error(ctx, GL_INVALID_OPERATION,
2285                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2286          return;
2287       }
2288    }
2289
2290    if (mask & GL_DEPTH_BUFFER_BIT) {
2291       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2292       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2293       if (!readRb ||
2294           !drawRb ||
2295           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2296           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2297          _mesa_error(ctx, GL_INVALID_OPERATION,
2298                      "glBlitFramebufferEXT(depth buffer size mismatch");
2299          return;
2300       }
2301    }
2302
2303    if (readFb->Visual.samples > 0 &&
2304        drawFb->Visual.samples > 0 &&
2305        readFb->Visual.samples != drawFb->Visual.samples) {
2306       _mesa_error(ctx, GL_INVALID_OPERATION,
2307                   "glBlitFramebufferEXT(mismatched samples");
2308       return;
2309    }
2310
2311    /* extra checks for multisample copies... */
2312    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2313       /* src and dest region sizes must be the same */
2314       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2315           srcY1 - srcY0 != dstY1 - dstY0) {
2316          _mesa_error(ctx, GL_INVALID_OPERATION,
2317                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2318          return;
2319       }
2320
2321       /* color formats must match */
2322       if (colorReadRb &&
2323           colorDrawRb &&
2324           colorReadRb->Format != colorDrawRb->Format) {
2325          _mesa_error(ctx, GL_INVALID_OPERATION,
2326                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2327          return;
2328       }
2329    }
2330
2331    if (!ctx->Extensions.EXT_framebuffer_blit) {
2332       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2333       return;
2334    }
2335
2336    /* Debug code */
2337    if (DEBUG_BLIT) {
2338       printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2339              " 0x%x, 0x%x)\n",
2340              srcX0, srcY0, srcX1, srcY1,
2341              dstX0, dstY0, dstX1, dstY1,
2342              mask, filter);
2343       if (colorReadRb) {
2344          const struct gl_renderbuffer_attachment *att;
2345
2346          att = find_attachment(readFb, colorReadRb);
2347          printf("  Src FBO %u  RB %u (%dx%d)  ",
2348                 readFb->Name, colorReadRb->Name,
2349                 colorReadRb->Width, colorReadRb->Height);
2350          if (att && att->Texture) {
2351             printf("Tex %u  tgt 0x%x  level %u  face %u",
2352                    att->Texture->Name,
2353                    att->Texture->Target,
2354                    att->TextureLevel,
2355                    att->CubeMapFace);
2356          }
2357          printf("\n");
2358
2359          att = find_attachment(drawFb, colorDrawRb);
2360          printf("  Dst FBO %u  RB %u (%dx%d)  ",
2361                 drawFb->Name, colorDrawRb->Name,
2362                 colorDrawRb->Width, colorDrawRb->Height);
2363          if (att && att->Texture) {
2364             printf("Tex %u  tgt 0x%x  level %u  face %u",
2365                    att->Texture->Name,
2366                    att->Texture->Target,
2367                    att->TextureLevel,
2368                    att->CubeMapFace);
2369          }
2370          printf("\n");
2371       }
2372    }
2373
2374    ASSERT(ctx->Driver.BlitFramebuffer);
2375    ctx->Driver.BlitFramebuffer(ctx,
2376                                srcX0, srcY0, srcX1, srcY1,
2377                                dstX0, dstY0, dstX1, dstY1,
2378                                mask, filter);
2379 }
2380 #endif /* FEATURE_EXT_framebuffer_blit */
2381
2382 #if FEATURE_ARB_geometry_shader4
2383 void GLAPIENTRY
2384 _mesa_FramebufferTextureARB(GLenum target, GLenum attachment,
2385                             GLuint texture, GLint level)
2386 {
2387    GET_CURRENT_CONTEXT(ctx);
2388    _mesa_error(ctx, GL_INVALID_OPERATION,
2389                "glFramebufferTextureARB "
2390                "not implemented!");
2391 }
2392
2393 void GLAPIENTRY
2394 _mesa_FramebufferTextureFaceARB(GLenum target, GLenum attachment,
2395                                 GLuint texture, GLint level, GLenum face)
2396 {
2397    GET_CURRENT_CONTEXT(ctx);
2398    _mesa_error(ctx, GL_INVALID_OPERATION,
2399                "glFramebufferTextureFaceARB "
2400                "not implemented!");
2401 }
2402 #endif /* FEATURE_ARB_geometry_shader4 */