src/mesa/main/fbobject.c

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