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  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /*
  27  * Authors:
  28  *   Brian Paul
  29  */
  30
  31
  32 #include "buffers.h"
  33 #include "context.h"
  34 #include "fbobject.h"
  35 #include "framebuffer.h"
  36 #include "hash.h"
  37 #include "mipmap.h"
  38 #include "renderbuffer.h"
  39 #include "state.h"
  40 #include "teximage.h"
  41 #include "texobj.h"
  42 #include "texstore.h"
  43
  44
  45 /**
  46  * Notes:
  47  *
  48  * None of the GL_EXT_framebuffer_object functions are compiled into
  49  * display lists.
  50  */
  51
  52
  53
  54 /*
  55  * When glGenRender/FramebuffersEXT() is called we insert pointers to
  56  * these placeholder objects into the hash table.
  57  * Later, when the object ID is first bound, we replace the placeholder
  58  * with the real frame/renderbuffer.
  59  */
  60 static struct gl_framebuffer DummyFramebuffer;
  61 static struct gl_renderbuffer DummyRenderbuffer;
  62
  63
  64 #define IS_CUBE_FACE(TARGET) \
  65    ((TARGET) >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && \
  66     (TARGET) <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
  67
  68
  69 static void
  70 delete_dummy_renderbuffer(struct gl_renderbuffer *rb)
  71 {
  72    /* no op */
  73 }
  74
  75 static void
  76 delete_dummy_framebuffer(struct gl_framebuffer *fb)
  77 {
  78    /* no op */
  79 }
  80
  81
  82 void
  83 _mesa_init_fbobjects(GLcontext *ctx)
  84 {
  85    DummyFramebuffer.Delete = delete_dummy_framebuffer;
  86    DummyRenderbuffer.Delete = delete_dummy_renderbuffer;
  87 }
  88
  89
  90 /**
  91  * Helper routine for getting a gl_renderbuffer.
  92  */
  93 struct gl_renderbuffer *
  94 _mesa_lookup_renderbuffer(GLcontext *ctx, GLuint id)
  95 {
  96    struct gl_renderbuffer *rb;
  97
  98    if (id == 0)
  99       return NULL;
 100
 101    rb = (struct gl_renderbuffer *)
 102       _mesa_HashLookup(ctx->Shared->RenderBuffers, id);
 103    return rb;
 104 }
 105
 106
 107 /**
 108  * Helper routine for getting a gl_framebuffer.
 109  */
 110 struct gl_framebuffer *
 111 _mesa_lookup_framebuffer(GLcontext *ctx, GLuint id)
 112 {
 113    struct gl_framebuffer *fb;
 114
 115    if (id == 0)
 116       return NULL;
 117
 118    fb = (struct gl_framebuffer *)
 119       _mesa_HashLookup(ctx->Shared->FrameBuffers, id);
 120    return fb;
 121 }
 122
 123
 124 /**
 125  * Given a GL_*_ATTACHMENTn token, return a pointer to the corresponding
 126  * gl_renderbuffer_attachment object.
 127  */
 128 struct gl_renderbuffer_attachment *
 129 _mesa_get_attachment(GLcontext *ctx, struct gl_framebuffer *fb,
 130                      GLenum attachment)
 131 {
 132    GLuint i;
 133
 134    switch (attachment) {
 135    case GL_COLOR_ATTACHMENT0_EXT:
 136    case GL_COLOR_ATTACHMENT1_EXT:
 137    case GL_COLOR_ATTACHMENT2_EXT:
 138    case GL_COLOR_ATTACHMENT3_EXT:
 139    case GL_COLOR_ATTACHMENT4_EXT:
 140    case GL_COLOR_ATTACHMENT5_EXT:
 141    case GL_COLOR_ATTACHMENT6_EXT:
 142    case GL_COLOR_ATTACHMENT7_EXT:
 143    case GL_COLOR_ATTACHMENT8_EXT:
 144    case GL_COLOR_ATTACHMENT9_EXT:
 145    case GL_COLOR_ATTACHMENT10_EXT:
 146    case GL_COLOR_ATTACHMENT11_EXT:
 147    case GL_COLOR_ATTACHMENT12_EXT:
 148    case GL_COLOR_ATTACHMENT13_EXT:
 149    case GL_COLOR_ATTACHMENT14_EXT:
 150    case GL_COLOR_ATTACHMENT15_EXT:
 151       i = attachment - GL_COLOR_ATTACHMENT0_EXT;
 152       if (i >= ctx->Const.MaxColorAttachments) {
 153          return NULL;
 154       }
 155       return &fb->Attachment[BUFFER_COLOR0 + i];
 156    case GL_DEPTH_ATTACHMENT_EXT:
 157       return &fb->Attachment[BUFFER_DEPTH];
 158    case GL_STENCIL_ATTACHMENT_EXT:
 159       return &fb->Attachment[BUFFER_STENCIL];
 160    default:
 161       return NULL;
 162    }
 163 }
 164
 165
 166 /**
 167  * Remove any texture or renderbuffer attached to the given attachment
 168  * point.  Update reference counts, etc.
 169  */
 170 void
 171 _mesa_remove_attachment(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
 172 {
 173    if (att->Type == GL_TEXTURE) {
 174       ASSERT(att->Texture);
 175       if (ctx->Driver.FinishRenderTexture) {
 176          /* tell driver that we're done rendering to this texture. */
 177          ctx->Driver.FinishRenderTexture(ctx, att);
 178       }
 179       _mesa_reference_texobj(&att->Texture, NULL); /* unbind */
 180       ASSERT(!att->Texture);
 181    }
 182    if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
 183       ASSERT(!att->Texture);
 184       _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
 185       ASSERT(!att->Renderbuffer);
 186    }
 187    att->Type = GL_NONE;
 188    att->Complete = GL_TRUE;
 189 }
 190
 191
 192 /**
 193  * Bind a texture object to an attachment point.
 194  * The previous binding, if any, will be removed first.
 195  */
 196 void
 197 _mesa_set_texture_attachment(GLcontext *ctx,
 198                              struct gl_framebuffer *fb,
 199                              struct gl_renderbuffer_attachment *att,
 200                              struct gl_texture_object *texObj,
 201                              GLenum texTarget, GLuint level, GLuint zoffset)
 202 {
 203    if (att->Texture == texObj) {
 204       /* re-attaching same texture */
 205       ASSERT(att->Type == GL_TEXTURE);
 206    }
 207    else {
 208       /* new attachment */
 209       _mesa_remove_attachment(ctx, att);
 210       att->Type = GL_TEXTURE;
 211       assert(!att->Texture);
 212       _mesa_reference_texobj(&att->Texture, texObj);
 213    }
 214
 215    /* always update these fields */
 216    att->TextureLevel = level;
 217    if (IS_CUBE_FACE(texTarget)) {
 218       att->CubeMapFace = texTarget - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 219    }
 220    else {
 221       att->CubeMapFace = 0;
 222    }
 223    att->Zoffset = zoffset;
 224    att->Complete = GL_FALSE;
 225
 226    if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 227       ctx->Driver.RenderTexture(ctx, fb, att);
 228    }
 229 }
 230
 231
 232 /**
 233  * Bind a renderbuffer to an attachment point.
 234  * The previous binding, if any, will be removed first.
 235  */
 236 void
 237 _mesa_set_renderbuffer_attachment(GLcontext *ctx,
 238                                   struct gl_renderbuffer_attachment *att,
 239                                   struct gl_renderbuffer *rb)
 240 {
 241    /* XXX check if re-doing same attachment, exit early */
 242    _mesa_remove_attachment(ctx, att);
 243    att->Type = GL_RENDERBUFFER_EXT;
 244    att->Texture = NULL; /* just to be safe */
 245    att->Complete = GL_FALSE;
 246    _mesa_reference_renderbuffer(&att->Renderbuffer, rb);
 247 }
 248
 249
 250 /**
 251  * Fallback for ctx->Driver.FramebufferRenderbuffer()
 252  * Attach a renderbuffer object to a framebuffer object.
 253  */
 254 void
 255 _mesa_framebuffer_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb,
 256                                GLenum attachment, struct gl_renderbuffer *rb)
 257 {
 258    struct gl_renderbuffer_attachment *att;
 259
 260    _glthread_LOCK_MUTEX(fb->Mutex);
 261
 262    att = _mesa_get_attachment(ctx, fb, attachment);
 263    ASSERT(att);
 264    if (rb) {
 265       _mesa_set_renderbuffer_attachment(ctx, att, rb);
 266    }
 267    else {
 268       _mesa_remove_attachment(ctx, att);
 269    }
 270
 271    _glthread_UNLOCK_MUTEX(fb->Mutex);
 272 }
 273
 274
 275 /**
 276  * Test if an attachment point is complete and update its Complete field.
 277  * \param format if GL_COLOR, this is a color attachment point,
 278  *               if GL_DEPTH, this is a depth component attachment point,
 279  *               if GL_STENCIL, this is a stencil component attachment point.
 280  */
 281 static void
 282 test_attachment_completeness(const GLcontext *ctx, GLenum format,
 283                              struct gl_renderbuffer_attachment *att)
 284 {
 285    assert(format == GL_COLOR || format == GL_DEPTH || format == GL_STENCIL);
 286
 287    /* assume complete */
 288    att->Complete = GL_TRUE;
 289
 290    /* Look for reasons why the attachment might be incomplete */
 291    if (att->Type == GL_TEXTURE) {
 292       const struct gl_texture_object *texObj = att->Texture;
 293       struct gl_texture_image *texImage;
 294
 295       if (!texObj) {
 296          att->Complete = GL_FALSE;
 297          return;
 298       }
 299
 300       texImage = texObj->Image[att->CubeMapFace][att->TextureLevel];
 301       if (!texImage) {
 302          att->Complete = GL_FALSE;
 303          return;
 304       }
 305       if (texImage->Width < 1 || texImage->Height < 1) {
 306          att->Complete = GL_FALSE;
 307          return;
 308       }
 309       if (texObj->Target == GL_TEXTURE_3D && att->Zoffset >= texImage->Depth) {
 310          att->Complete = GL_FALSE;
 311          return;
 312       }
 313
 314       if (format == GL_COLOR) {
 315          if (texImage->TexFormat->BaseFormat != GL_RGB &&
 316              texImage->TexFormat->BaseFormat != GL_RGBA) {
 317             att->Complete = GL_FALSE;
 318             return;
 319          }
 320       }
 321       else if (format == GL_DEPTH) {
 322          if (texImage->TexFormat->BaseFormat == GL_DEPTH_COMPONENT) {
 323             /* OK */
 324          }
 325          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 326                   texImage->TexFormat->BaseFormat == GL_DEPTH_STENCIL_EXT) {
 327             /* OK */
 328          }
 329          else {
 330             att->Complete = GL_FALSE;
 331             return;
 332          }
 333       }
 334       else {
 335          /* no such thing as stencil textures */
 336          att->Complete = GL_FALSE;
 337          return;
 338       }
 339    }
 340    else if (att->Type == GL_RENDERBUFFER_EXT) {
 341       ASSERT(att->Renderbuffer);
 342       if (!att->Renderbuffer->InternalFormat ||
 343           att->Renderbuffer->Width < 1 ||
 344           att->Renderbuffer->Height < 1) {
 345          att->Complete = GL_FALSE;
 346          return;
 347       }
 348       if (format == GL_COLOR) {
 349          if (att->Renderbuffer->_BaseFormat != GL_RGB &&
 350              att->Renderbuffer->_BaseFormat != GL_RGBA) {
 351             ASSERT(att->Renderbuffer->RedBits);
 352             ASSERT(att->Renderbuffer->GreenBits);
 353             ASSERT(att->Renderbuffer->BlueBits);
 354             att->Complete = GL_FALSE;
 355             return;
 356          }
 357       }
 358       else if (format == GL_DEPTH) {
 359          ASSERT(att->Renderbuffer->DepthBits);
 360          if (att->Renderbuffer->_BaseFormat == GL_DEPTH_COMPONENT) {
 361             /* OK */
 362          }
 363          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 364                   att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
 365             /* OK */
 366          }
 367          else {
 368             att->Complete = GL_FALSE;
 369             return;
 370          }
 371       }
 372       else {
 373          assert(format == GL_STENCIL);
 374          ASSERT(att->Renderbuffer->StencilBits);
 375          if (att->Renderbuffer->_BaseFormat == GL_STENCIL_INDEX) {
 376             /* OK */
 377          }
 378          else if (ctx->Extensions.EXT_packed_depth_stencil &&
 379                   att->Renderbuffer->_BaseFormat == GL_DEPTH_STENCIL_EXT) {
 380             /* OK */
 381          }
 382          else {
 383             att->Complete = GL_FALSE;
 384             return;
 385          }
 386       }
 387    }
 388    else {
 389       ASSERT(att->Type == GL_NONE);
 390       /* complete */
 391       return;
 392    }
 393 }
 394
 395
 396 /**
 397  * Helpful for debugging
 398  */
 399 static void
 400 fbo_incomplete(const char *msg, int index)
 401 {
 402    (void) msg;
 403    (void) index;
 404    /*
 405    _mesa_debug(NULL, "FBO Incomplete: %s [%d]\n", msg, index);
 406    */
 407 }
 408
 409
 410 /**
 411  * Test if the given framebuffer object is complete and update its
 412  * Status field with the results.
 413  * Also update the framebuffer's Width and Height fields if the
 414  * framebuffer is complete.
 415  */
 416 void
 417 _mesa_test_framebuffer_completeness(GLcontext *ctx, struct gl_framebuffer *fb)
 418 {
 419    GLuint numImages, width = 0, height = 0;
 420    GLenum intFormat = GL_NONE;
 421    GLuint w = 0, h = 0;
 422    GLint i;
 423    GLuint j;
 424
 425    assert(fb->Name != 0);
 426
 427    numImages = 0;
 428    fb->Width = 0;
 429    fb->Height = 0;
 430
 431    /* Start at -2 to more easily loop over all attachment points */
 432    for (i = -2; i < (GLint) ctx->Const.MaxColorAttachments; i++) {
 433       struct gl_renderbuffer_attachment *att;
 434       GLenum f;
 435
 436       if (i == -2) {
 437          att = &fb->Attachment[BUFFER_DEPTH];
 438          test_attachment_completeness(ctx, GL_DEPTH, att);
 439          if (!att->Complete) {
 440             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 441             fbo_incomplete("depth attachment incomplete", -1);
 442             return;
 443          }
 444       }
 445       else if (i == -1) {
 446          att = &fb->Attachment[BUFFER_STENCIL];
 447          test_attachment_completeness(ctx, GL_STENCIL, att);
 448          if (!att->Complete) {
 449             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 450             fbo_incomplete("stencil attachment incomplete", -1);
 451             return;
 452          }
 453       }
 454       else {
 455          att = &fb->Attachment[BUFFER_COLOR0 + i];
 456          test_attachment_completeness(ctx, GL_COLOR, att);
 457          if (!att->Complete) {
 458             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT;
 459             fbo_incomplete("color attachment incomplete", i);
 460             return;
 461          }
 462       }
 463
 464       if (att->Type == GL_TEXTURE) {
 465          const struct gl_texture_image *texImg
 466             = att->Texture->Image[att->CubeMapFace][att->TextureLevel];
 467          w = texImg->Width;
 468          h = texImg->Height;
 469          f = texImg->_BaseFormat;
 470          numImages++;
 471          if (f != GL_RGB && f != GL_RGBA && f != GL_DEPTH_COMPONENT
 472              && f != GL_DEPTH_STENCIL_EXT) {
 473             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 474             fbo_incomplete("texture attachment incomplete", -1);
 475             return;
 476          }
 477       }
 478       else if (att->Type == GL_RENDERBUFFER_EXT) {
 479          w = att->Renderbuffer->Width;
 480          h = att->Renderbuffer->Height;
 481          f = att->Renderbuffer->InternalFormat;
 482          numImages++;
 483       }
 484       else {
 485          assert(att->Type == GL_NONE);
 486          continue;
 487       }
 488
 489       if (numImages == 1) {
 490          /* set required width, height and format */
 491          width = w;
 492          height = h;
 493          if (i >= 0)
 494             intFormat = f;
 495       }
 496       else {
 497          /* check that width, height, format are same */
 498          if (w != width || h != height) {
 499             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 500             fbo_incomplete("width or height mismatch", -1);
 501             return;
 502          }
 503          if (intFormat != GL_NONE && f != intFormat) {
 504             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT;
 505             fbo_incomplete("format mismatch", -1);
 506             return;
 507          }
 508       }
 509    }
 510
 511 #ifndef FEATURE_OES_framebuffer_object
 512    /* Check that all DrawBuffers are present */
 513    for (j = 0; j < ctx->Const.MaxDrawBuffers; j++) {
 514       if (fb->ColorDrawBuffer[j] != GL_NONE) {
 515          const struct gl_renderbuffer_attachment *att
 516             = _mesa_get_attachment(ctx, fb, fb->ColorDrawBuffer[j]);
 517          assert(att);
 518          if (att->Type == GL_NONE) {
 519             fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT;
 520             fbo_incomplete("missing drawbuffer", j);
 521             return;
 522          }
 523       }
 524    }
 525
 526    /* Check that the ReadBuffer is present */
 527    if (fb->ColorReadBuffer != GL_NONE) {
 528       const struct gl_renderbuffer_attachment *att
 529          = _mesa_get_attachment(ctx, fb, fb->ColorReadBuffer);
 530       assert(att);
 531       if (att->Type == GL_NONE) {
 532          fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT;
 533             fbo_incomplete("missing readbuffer", -1);
 534          return;
 535       }
 536    }
 537 #endif
 538
 539    if (numImages == 0) {
 540       fb->_Status = GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT;
 541       fbo_incomplete("no attachments", -1);
 542       return;
 543    }
 544
 545    /*
 546     * If we get here, the framebuffer is complete!
 547     */
 548    fb->_Status = GL_FRAMEBUFFER_COMPLETE_EXT;
 549    fb->Width = w;
 550    fb->Height = h;
 551 }
 552
 553
 554 GLboolean GLAPIENTRY
 555 _mesa_IsRenderbufferEXT(GLuint renderbuffer)
 556 {
 557    GET_CURRENT_CONTEXT(ctx);
 558    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 559    if (renderbuffer) {
 560       struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 561       if (rb != NULL && rb != &DummyRenderbuffer)
 562          return GL_TRUE;
 563    }
 564    return GL_FALSE;
 565 }
 566
 567
 568 void GLAPIENTRY
 569 _mesa_BindRenderbufferEXT(GLenum target, GLuint renderbuffer)
 570 {
 571    struct gl_renderbuffer *newRb;
 572    GET_CURRENT_CONTEXT(ctx);
 573
 574    ASSERT_OUTSIDE_BEGIN_END(ctx);
 575
 576    if (target != GL_RENDERBUFFER_EXT) {
 577          _mesa_error(ctx, GL_INVALID_ENUM,
 578                   "glBindRenderbufferEXT(target)");
 579       return;
 580    }
 581
 582    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 583    /* The above doesn't fully flush the drivers in the way that a
 584     * glFlush does, but that is required here:
 585     */
 586    if (ctx->Driver.Flush)
 587       ctx->Driver.Flush(ctx);
 588
 589
 590    if (renderbuffer) {
 591       newRb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
 592       if (newRb == &DummyRenderbuffer) {
 593          /* ID was reserved, but no real renderbuffer object made yet */
 594          newRb = NULL;
 595       }
 596       if (!newRb) {
 597          /* create new renderbuffer object */
 598          newRb = ctx->Driver.NewRenderbuffer(ctx, renderbuffer);
 599          if (!newRb) {
 600             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindRenderbufferEXT");
 601             return;
 602          }
 603          ASSERT(newRb->AllocStorage);
 604          _mesa_HashInsert(ctx->Shared->RenderBuffers, renderbuffer, newRb);
 605          newRb->RefCount = 1; /* referenced by hash table */
 606       }
 607    }
 608    else {
 609       newRb = NULL;
 610    }
 611
 612    ASSERT(newRb != &DummyRenderbuffer);
 613
 614    _mesa_reference_renderbuffer(&ctx->CurrentRenderbuffer, newRb);
 615 }
 616
 617
 618 void GLAPIENTRY
 619 _mesa_DeleteRenderbuffersEXT(GLsizei n, const GLuint *renderbuffers)
 620 {
 621    GLint i;
 622    GET_CURRENT_CONTEXT(ctx);
 623
 624    ASSERT_OUTSIDE_BEGIN_END(ctx);
 625    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 626
 627    for (i = 0; i < n; i++) {
 628       if (renderbuffers[i] > 0) {
 629          struct gl_renderbuffer *rb;
 630          rb = _mesa_lookup_renderbuffer(ctx, renderbuffers[i]);
 631          if (rb) {
 632             /* check if deleting currently bound renderbuffer object */
 633             if (rb == ctx->CurrentRenderbuffer) {
 634                /* bind default */
 635                ASSERT(rb->RefCount >= 2);
 636                _mesa_BindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 637             }
 638
 639             /* Remove from hash table immediately, to free the ID.
 640              * But the object will not be freed until it's no longer
 641              * referenced anywhere else.
 642              */
 643             _mesa_HashRemove(ctx->Shared->RenderBuffers, renderbuffers[i]);
 644
 645             if (rb != &DummyRenderbuffer) {
 646                /* no longer referenced by hash table */
 647                _mesa_reference_renderbuffer(&rb, NULL);
 648             }
 649          }
 650       }
 651    }
 652 }
 653
 654
 655 void GLAPIENTRY
 656 _mesa_GenRenderbuffersEXT(GLsizei n, GLuint *renderbuffers)
 657 {
 658    GET_CURRENT_CONTEXT(ctx);
 659    GLuint first;
 660    GLint i;
 661
 662    ASSERT_OUTSIDE_BEGIN_END(ctx);
 663
 664    if (n < 0) {
 665       _mesa_error(ctx, GL_INVALID_VALUE, "glGenRenderbuffersEXT(n)");
 666       return;
 667    }
 668
 669    if (!renderbuffers)
 670       return;
 671
 672    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->RenderBuffers, n);
 673
 674    for (i = 0; i < n; i++) {
 675       GLuint name = first + i;
 676       renderbuffers[i] = name;
 677       /* insert dummy placeholder into hash table */
 678       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
 679       _mesa_HashInsert(ctx->Shared->RenderBuffers, name, &DummyRenderbuffer);
 680       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
 681    }
 682 }
 683
 684
 685 /**
 686  * Given an internal format token for a render buffer, return the
 687  * corresponding base format.
 688  * This is very similar to _mesa_base_tex_format() but the set of valid
 689  * internal formats is somewhat different.
 690  *
 691  * \return one of GL_RGB, GL_RGBA, GL_STENCIL_INDEX, GL_DEPTH_COMPONENT
 692  *  GL_DEPTH_STENCIL_EXT or zero if error.
 693  */
 694 GLenum
 695 _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
 696 {
 697    switch (internalFormat) {
 698    case GL_RGB:
 699    case GL_R3_G3_B2:
 700    case GL_RGB4:
 701    case GL_RGB5:
 702    case GL_RGB8:
 703    case GL_RGB10:
 704    case GL_RGB12:
 705    case GL_RGB16:
 706       return GL_RGB;
 707    case GL_RGBA:
 708    case GL_RGBA2:
 709    case GL_RGBA4:
 710    case GL_RGB5_A1:
 711    case GL_RGBA8:
 712    case GL_RGB10_A2:
 713    case GL_RGBA12:
 714    case GL_RGBA16:
 715       return GL_RGBA;
 716    case GL_STENCIL_INDEX:
 717    case GL_STENCIL_INDEX1_EXT:
 718    case GL_STENCIL_INDEX4_EXT:
 719    case GL_STENCIL_INDEX8_EXT:
 720    case GL_STENCIL_INDEX16_EXT:
 721       return GL_STENCIL_INDEX;
 722    case GL_DEPTH_COMPONENT:
 723    case GL_DEPTH_COMPONENT16:
 724    case GL_DEPTH_COMPONENT24:
 725    case GL_DEPTH_COMPONENT32:
 726       return GL_DEPTH_COMPONENT;
 727    case GL_DEPTH_STENCIL_EXT:
 728    case GL_DEPTH24_STENCIL8_EXT:
 729       if (ctx->Extensions.EXT_packed_depth_stencil)
 730          return GL_DEPTH_STENCIL_EXT;
 731       else
 732          return 0;
 733    /* XXX add floating point formats eventually */
 734    default:
 735       return 0;
 736    }
 737 }
 738
 739
 740 void GLAPIENTRY
 741 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
 742                              GLsizei width, GLsizei height)
 743 {
 744    struct gl_renderbuffer *rb;
 745    GLenum baseFormat;
 746    GET_CURRENT_CONTEXT(ctx);
 747
 748    ASSERT_OUTSIDE_BEGIN_END(ctx);
 749
 750    if (target != GL_RENDERBUFFER_EXT) {
 751       _mesa_error(ctx, GL_INVALID_ENUM, "glRenderbufferStorageEXT(target)");
 752       return;
 753    }
 754
 755    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 756    if (baseFormat == 0) {
 757       _mesa_error(ctx, GL_INVALID_ENUM,
 758                   "glRenderbufferStorageEXT(internalFormat)");
 759       return;
 760    }
 761
 762    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 763       _mesa_error(ctx, GL_INVALID_VALUE, "glRenderbufferStorageEXT(width)");
 764       return;
 765    }
 766
 767    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 768       _mesa_error(ctx, GL_INVALID_VALUE, "glRenderbufferStorageEXT(height)");
 769       return;
 770    }
 771
 772    rb = ctx->CurrentRenderbuffer;
 773
 774    if (!rb) {
 775       _mesa_error(ctx, GL_INVALID_OPERATION, "glRenderbufferStorageEXT");
 776       return;
 777    }
 778
 779    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 780
 781    if (rb->InternalFormat == internalFormat &&
 782        rb->Width == (GLuint) width &&
 783        rb->Height == (GLuint) height) {
 784       /* no change in allocation needed */
 785       return;
 786    }
 787
 788    /* These MUST get set by the AllocStorage func */
 789    rb->_ActualFormat = 0;
 790    rb->RedBits =
 791    rb->GreenBits =
 792    rb->BlueBits =
 793    rb->AlphaBits =
 794    rb->IndexBits =
 795    rb->DepthBits =
 796    rb->StencilBits = 0;
 797
 798    /* Now allocate the storage */
 799    ASSERT(rb->AllocStorage);
 800    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
 801       /* No error - check/set fields now */
 802       assert(rb->_ActualFormat);
 803       assert(rb->Width == (GLuint) width);
 804       assert(rb->Height == (GLuint) height);
 805       assert(rb->RedBits || rb->GreenBits || rb->BlueBits || rb->AlphaBits ||
 806              rb->DepthBits || rb->StencilBits || rb->IndexBits);
 807       rb->InternalFormat = internalFormat;
 808       rb->_BaseFormat = baseFormat;
 809    }
 810    else {
 811       /* Probably ran out of memory - clear the fields */
 812       rb->Width = 0;
 813       rb->Height = 0;
 814       rb->InternalFormat = GL_NONE;
 815       rb->_ActualFormat = GL_NONE;
 816       rb->_BaseFormat = GL_NONE;
 817       rb->RedBits =
 818       rb->GreenBits =
 819       rb->BlueBits =
 820       rb->AlphaBits =
 821       rb->IndexBits =
 822       rb->DepthBits =
 823       rb->StencilBits = 0;
 824    }
 825
 826    /*
 827    test_framebuffer_completeness(ctx, fb);
 828    */
 829    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
 830     * points???
 831     */
 832 }
 833
 834
 835 void GLAPIENTRY
 836 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
 837 {
 838    GET_CURRENT_CONTEXT(ctx);
 839
 840    ASSERT_OUTSIDE_BEGIN_END(ctx);
 841
 842    if (target != GL_RENDERBUFFER_EXT) {
 843       _mesa_error(ctx, GL_INVALID_ENUM,
 844                   "glGetRenderbufferParameterivEXT(target)");
 845       return;
 846    }
 847
 848    if (!ctx->CurrentRenderbuffer) {
 849       _mesa_error(ctx, GL_INVALID_OPERATION,
 850                   "glGetRenderbufferParameterivEXT");
 851       return;
 852    }
 853
 854    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 855
 856    switch (pname) {
 857    case GL_RENDERBUFFER_WIDTH_EXT:
 858       *params = ctx->CurrentRenderbuffer->Width;
 859       return;
 860    case GL_RENDERBUFFER_HEIGHT_EXT:
 861       *params = ctx->CurrentRenderbuffer->Height;
 862       return;
 863    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
 864       *params = ctx->CurrentRenderbuffer->InternalFormat;
 865       return;
 866    case GL_RENDERBUFFER_RED_SIZE_EXT:
 867       *params = ctx->CurrentRenderbuffer->RedBits;
 868       break;
 869    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
 870       *params = ctx->CurrentRenderbuffer->GreenBits;
 871       break;
 872    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
 873       *params = ctx->CurrentRenderbuffer->BlueBits;
 874       break;
 875    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
 876       *params = ctx->CurrentRenderbuffer->AlphaBits;
 877       break;
 878    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
 879       *params = ctx->CurrentRenderbuffer->DepthBits;
 880       break;
 881    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
 882       *params = ctx->CurrentRenderbuffer->StencilBits;
 883       break;
 884    default:
 885       _mesa_error(ctx, GL_INVALID_ENUM,
 886                   "glGetRenderbufferParameterivEXT(target)");
 887       return;
 888    }
 889 }
 890
 891
 892 GLboolean GLAPIENTRY
 893 _mesa_IsFramebufferEXT(GLuint framebuffer)
 894 {
 895    GET_CURRENT_CONTEXT(ctx);
 896    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 897    if (framebuffer) {
 898       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
 899       if (rb != NULL && rb != &DummyFramebuffer)
 900          return GL_TRUE;
 901    }
 902    return GL_FALSE;
 903 }
 904
 905
 906 static void
 907 check_begin_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
 908 {
 909    GLuint i;
 910    ASSERT(ctx->Driver.RenderTexture);
 911    for (i = 0; i < BUFFER_COUNT; i++) {
 912       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
 913       struct gl_texture_object *texObj = att->Texture;
 914       if (texObj
 915           && att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
 916          ctx->Driver.RenderTexture(ctx, fb, att);
 917       }
 918    }
 919 }
 920
 921
 922 /**
 923  * Examine all the framebuffer's attachments to see if any are textures.
 924  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
 925  * notify the device driver that the texture image may have changed.
 926  */
 927 static void
 928 check_end_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
 929 {
 930    if (ctx->Driver.FinishRenderTexture) {
 931       GLuint i;
 932       for (i = 0; i < BUFFER_COUNT; i++) {
 933          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
 934          if (att->Texture && att->Renderbuffer) {
 935             ctx->Driver.FinishRenderTexture(ctx, att);
 936          }
 937       }
 938    }
 939 }
 940
 941
 942 void GLAPIENTRY
 943 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
 944 {
 945    struct gl_framebuffer *newFb, *newFbread;
 946    GLboolean bindReadBuf, bindDrawBuf;
 947    GET_CURRENT_CONTEXT(ctx);
 948
 949    ASSERT_OUTSIDE_BEGIN_END(ctx);
 950
 951    if (!ctx->Extensions.EXT_framebuffer_object) {
 952       _mesa_error(ctx, GL_INVALID_OPERATION,
 953                   "glBindFramebufferEXT(unsupported)");
 954       return;
 955    }
 956
 957    switch (target) {
 958 #if FEATURE_EXT_framebuffer_blit
 959    case GL_DRAW_FRAMEBUFFER_EXT:
 960       if (!ctx->Extensions.EXT_framebuffer_blit) {
 961          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
 962          return;
 963       }
 964       bindDrawBuf = GL_TRUE;
 965       bindReadBuf = GL_FALSE;
 966       break;
 967    case GL_READ_FRAMEBUFFER_EXT:
 968       if (!ctx->Extensions.EXT_framebuffer_blit) {
 969          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
 970          return;
 971       }
 972       bindDrawBuf = GL_FALSE;
 973       bindReadBuf = GL_TRUE;
 974       break;
 975 #endif
 976    case GL_FRAMEBUFFER_EXT:
 977       bindDrawBuf = GL_TRUE;
 978       bindReadBuf = GL_TRUE;
 979       break;
 980    default:
 981       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
 982       return;
 983    }
 984
 985    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 986
 987    if (ctx->Driver.Flush) {
 988       ctx->Driver.Flush(ctx);
 989    }
 990
 991    if (framebuffer) {
 992       /* Binding a user-created framebuffer object */
 993       newFb = _mesa_lookup_framebuffer(ctx, framebuffer);
 994       if (newFb == &DummyFramebuffer) {
 995          /* ID was reserved, but no real framebuffer object made yet */
 996          newFb = NULL;
 997       }
 998       if (!newFb) {
 999          /* create new framebuffer object */
1000          newFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1001          if (!newFb) {
1002             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1003             return;
1004          }
1005          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
1006       }
1007       newFbread = newFb;
1008    }
1009    else {
1010       /* Binding the window system framebuffer (which was originally set
1011        * with MakeCurrent).
1012        */
1013       newFb = ctx->WinSysDrawBuffer;
1014       newFbread = ctx->WinSysReadBuffer;
1015    }
1016
1017    ASSERT(newFb);
1018    ASSERT(newFb != &DummyFramebuffer);
1019
1020    /*
1021     * XXX check if re-binding same buffer and skip some of this code.
1022     */
1023
1024    if (bindReadBuf) {
1025       _mesa_reference_framebuffer(&ctx->ReadBuffer, newFbread);
1026    }
1027
1028    if (bindDrawBuf) {
1029       /* check if old FB had any texture attachments */
1030       check_end_texture_render(ctx, ctx->DrawBuffer);
1031
1032       /* check if time to delete this framebuffer */
1033       _mesa_reference_framebuffer(&ctx->DrawBuffer, newFb);
1034
1035       if (newFb->Name != 0) {
1036          /* check if newly bound framebuffer has any texture attachments */
1037          check_begin_texture_render(ctx, newFb);
1038       }
1039    }
1040
1041    if (ctx->Driver.BindFramebuffer) {
1042       ctx->Driver.BindFramebuffer(ctx, target, newFb, newFbread);
1043    }
1044 }
1045
1046
1047 void GLAPIENTRY
1048 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1049 {
1050    GLint i;
1051    GET_CURRENT_CONTEXT(ctx);
1052
1053    ASSERT_OUTSIDE_BEGIN_END(ctx);
1054    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1055    /* The above doesn't fully flush the drivers in the way that a
1056     * glFlush does, but that is required here:
1057     */
1058    if (ctx->Driver.Flush)
1059       ctx->Driver.Flush(ctx);
1060
1061    for (i = 0; i < n; i++) {
1062       if (framebuffers[i] > 0) {
1063          struct gl_framebuffer *fb;
1064          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1065          if (fb) {
1066             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1067
1068             /* check if deleting currently bound framebuffer object */
1069             if (fb == ctx->DrawBuffer) {
1070                /* bind default */
1071                ASSERT(fb->RefCount >= 2);
1072                _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1073             }
1074
1075             /* remove from hash table immediately, to free the ID */
1076             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1077
1078             if (fb != &DummyFramebuffer) {
1079                /* But the object will not be freed until it's no longer
1080                 * bound in any context.
1081                 */
1082                _mesa_unreference_framebuffer(&fb);
1083             }
1084          }
1085       }
1086    }
1087 }
1088
1089
1090 void GLAPIENTRY
1091 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1092 {
1093    GET_CURRENT_CONTEXT(ctx);
1094    GLuint first;
1095    GLint i;
1096
1097    ASSERT_OUTSIDE_BEGIN_END(ctx);
1098
1099    if (n < 0) {
1100       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1101       return;
1102    }
1103
1104    if (!framebuffers)
1105       return;
1106
1107    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1108
1109    for (i = 0; i < n; i++) {
1110       GLuint name = first + i;
1111       framebuffers[i] = name;
1112       /* insert dummy placeholder into hash table */
1113       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1114       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1115       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1116    }
1117 }
1118
1119
1120
1121 GLenum GLAPIENTRY
1122 _mesa_CheckFramebufferStatusEXT(GLenum target)
1123 {
1124    struct gl_framebuffer *buffer;
1125    GET_CURRENT_CONTEXT(ctx);
1126
1127    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1128
1129    switch (target) {
1130 #if FEATURE_EXT_framebuffer_blit
1131    case GL_DRAW_FRAMEBUFFER_EXT:
1132       if (!ctx->Extensions.EXT_framebuffer_blit) {
1133          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1134          return 0;
1135       }
1136       buffer = ctx->DrawBuffer;
1137       break;
1138    case GL_READ_FRAMEBUFFER_EXT:
1139       if (!ctx->Extensions.EXT_framebuffer_blit) {
1140          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1141          return 0;
1142       }
1143       buffer = ctx->ReadBuffer;
1144       break;
1145 #endif
1146    case GL_FRAMEBUFFER_EXT:
1147       buffer = ctx->DrawBuffer;
1148       break;
1149    default:
1150       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1151       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1152    }
1153
1154    if (buffer->Name == 0) {
1155       /* The window system / default framebuffer is always complete */
1156       return GL_FRAMEBUFFER_COMPLETE_EXT;
1157    }
1158
1159    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1160
1161    _mesa_test_framebuffer_completeness(ctx, buffer);
1162    return buffer->_Status;
1163 }
1164
1165
1166
1167 /**
1168  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1169  */
1170 static void
1171 framebuffer_texture(GLcontext *ctx, const char *caller, GLenum target,
1172                     GLenum attachment, GLenum textarget, GLuint texture,
1173                     GLint level, GLint zoffset)
1174 {
1175    struct gl_renderbuffer_attachment *att;
1176    struct gl_texture_object *texObj = NULL;
1177    struct gl_framebuffer *fb;
1178
1179    ASSERT_OUTSIDE_BEGIN_END(ctx);
1180
1181    if (target != GL_FRAMEBUFFER_EXT) {
1182       _mesa_error(ctx, GL_INVALID_ENUM,
1183                   "glFramebufferTexture%sEXT(target)", caller);
1184       return;
1185    }
1186
1187    fb = ctx->DrawBuffer;
1188    ASSERT(fb);
1189
1190    /* check framebuffer binding */
1191    if (fb->Name == 0) {
1192       _mesa_error(ctx, GL_INVALID_OPERATION,
1193                   "glFramebufferTexture%sEXT", caller);
1194       return;
1195    }
1196
1197
1198    /* The textarget, level, and zoffset parameters are only validated if
1199     * texture is non-zero.
1200     */
1201    if (texture) {
1202       GLboolean err = GL_TRUE;
1203
1204       texObj = _mesa_lookup_texture(ctx, texture);
1205       if (texObj != NULL) {
1206          if (textarget == 0) {
1207             err = (texObj->Target != GL_TEXTURE_3D) &&
1208                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1209                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1210          }
1211          else {
1212             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1213                 ? !IS_CUBE_FACE(textarget)
1214                 : (texObj->Target != textarget);
1215          }
1216       }
1217
1218       if (err) {
1219          _mesa_error(ctx, GL_INVALID_OPERATION,
1220                      "glFramebufferTexture%sEXT(texture target mismatch)",
1221                      caller);
1222          return;
1223       }
1224
1225       if (texObj->Target == GL_TEXTURE_3D) {
1226          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1227          if (zoffset < 0 || zoffset >= maxSize) {
1228             _mesa_error(ctx, GL_INVALID_VALUE,
1229                         "glFramebufferTexture%sEXT(zoffset)", caller);
1230             return;
1231          }
1232       }
1233       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1234                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1235          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1236             _mesa_error(ctx, GL_INVALID_VALUE,
1237                         "glFramebufferTexture%sEXT(layer)", caller);
1238             return;
1239          }
1240       }
1241
1242
1243       if ((level < 0) ||
1244           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1245          _mesa_error(ctx, GL_INVALID_VALUE,
1246                      "glFramebufferTexture%sEXT(level)", caller);
1247          return;
1248       }
1249    }
1250
1251    att = _mesa_get_attachment(ctx, fb, attachment);
1252    if (att == NULL) {
1253       _mesa_error(ctx, GL_INVALID_ENUM,
1254                   "glFramebufferTexture%sEXT(attachment)", caller);
1255       return;
1256    }
1257
1258    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1259    /* The above doesn't fully flush the drivers in the way that a
1260     * glFlush does, but that is required here:
1261     */
1262    if (ctx->Driver.Flush)
1263       ctx->Driver.Flush(ctx);
1264
1265    _glthread_LOCK_MUTEX(fb->Mutex);
1266    if (texObj) {
1267       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1268                                    level, zoffset);
1269    }
1270    else {
1271       _mesa_remove_attachment(ctx, att);
1272    }
1273    _glthread_UNLOCK_MUTEX(fb->Mutex);
1274 }
1275
1276
1277
1278 void GLAPIENTRY
1279 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1280                               GLenum textarget, GLuint texture, GLint level)
1281 {
1282    GET_CURRENT_CONTEXT(ctx);
1283
1284    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1285       _mesa_error(ctx, GL_INVALID_ENUM,
1286                   "glFramebufferTexture1DEXT(textarget)");
1287       return;
1288    }
1289
1290    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1291                        level, 0);
1292 }
1293
1294
1295 void GLAPIENTRY
1296 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1297                               GLenum textarget, GLuint texture, GLint level)
1298 {
1299    GET_CURRENT_CONTEXT(ctx);
1300
1301    if ((texture != 0) &&
1302        (textarget != GL_TEXTURE_2D) &&
1303        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1304        (!IS_CUBE_FACE(textarget))) {
1305       _mesa_error(ctx, GL_INVALID_OPERATION,
1306                   "glFramebufferTexture2DEXT(textarget)");
1307       return;
1308    }
1309
1310    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1311                        level, 0);
1312 }
1313
1314
1315 void GLAPIENTRY
1316 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1317                               GLenum textarget, GLuint texture,
1318                               GLint level, GLint zoffset)
1319 {
1320    GET_CURRENT_CONTEXT(ctx);
1321
1322    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1323       _mesa_error(ctx, GL_INVALID_ENUM,
1324                   "glFramebufferTexture3DEXT(textarget)");
1325       return;
1326    }
1327
1328    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1329                        level, zoffset);
1330 }
1331
1332
1333 void GLAPIENTRY
1334 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1335                                  GLuint texture, GLint level, GLint layer)
1336 {
1337    GET_CURRENT_CONTEXT(ctx);
1338
1339    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1340                        level, layer);
1341 }
1342
1343
1344 void GLAPIENTRY
1345 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1346                                  GLenum renderbufferTarget,
1347                                  GLuint renderbuffer)
1348 {
1349    struct gl_renderbuffer_attachment *att;
1350    struct gl_framebuffer *fb;
1351    struct gl_renderbuffer *rb;
1352    GET_CURRENT_CONTEXT(ctx);
1353
1354    ASSERT_OUTSIDE_BEGIN_END(ctx);
1355
1356    switch (target) {
1357 #if FEATURE_EXT_framebuffer_blit
1358    case GL_DRAW_FRAMEBUFFER_EXT:
1359       if (!ctx->Extensions.EXT_framebuffer_blit) {
1360          _mesa_error(ctx, GL_INVALID_ENUM,
1361                      "glFramebufferRenderbufferEXT(target)");
1362          return;
1363       }
1364       fb = ctx->DrawBuffer;
1365       break;
1366    case GL_READ_FRAMEBUFFER_EXT:
1367       if (!ctx->Extensions.EXT_framebuffer_blit) {
1368          _mesa_error(ctx, GL_INVALID_ENUM,
1369                      "glFramebufferRenderbufferEXT(target)");
1370          return;
1371       }
1372       fb = ctx->ReadBuffer;
1373       break;
1374 #endif
1375    case GL_FRAMEBUFFER_EXT:
1376       fb = ctx->DrawBuffer;
1377       break;
1378    default:
1379       _mesa_error(ctx, GL_INVALID_ENUM,
1380                   "glFramebufferRenderbufferEXT(target)");
1381       return;
1382    }
1383
1384    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1385       _mesa_error(ctx, GL_INVALID_ENUM,
1386                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1387       return;
1388    }
1389
1390    if (fb->Name == 0) {
1391       /* Can't attach new renderbuffers to a window system framebuffer */
1392       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1393       return;
1394    }
1395
1396    att = _mesa_get_attachment(ctx, fb, attachment);
1397    if (att == NULL) {
1398       _mesa_error(ctx, GL_INVALID_ENUM,
1399                  "glFramebufferRenderbufferEXT(attachment)");
1400       return;
1401    }
1402
1403    if (renderbuffer) {
1404       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1405       if (!rb) {
1406          _mesa_error(ctx, GL_INVALID_OPERATION,
1407                      "glFramebufferRenderbufferEXT(renderbuffer)");
1408          return;
1409       }
1410    }
1411    else {
1412       /* remove renderbuffer attachment */
1413       rb = NULL;
1414    }
1415
1416    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1417    /* The above doesn't fully flush the drivers in the way that a
1418     * glFlush does, but that is required here:
1419     */
1420    if (ctx->Driver.Flush)
1421       ctx->Driver.Flush(ctx);
1422
1423    assert(ctx->Driver.FramebufferRenderbuffer);
1424    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1425
1426    /* Some subsequent GL commands may depend on the framebuffer's visual
1427     * after the binding is updated.  Update visual info now.
1428     */
1429    _mesa_update_framebuffer_visual(fb);
1430 }
1431
1432
1433 void GLAPIENTRY
1434 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1435                                              GLenum pname, GLint *params)
1436 {
1437    const struct gl_renderbuffer_attachment *att;
1438    struct gl_framebuffer *buffer;
1439    GET_CURRENT_CONTEXT(ctx);
1440
1441    ASSERT_OUTSIDE_BEGIN_END(ctx);
1442
1443    switch (target) {
1444 #if FEATURE_EXT_framebuffer_blit
1445    case GL_DRAW_FRAMEBUFFER_EXT:
1446       if (!ctx->Extensions.EXT_framebuffer_blit) {
1447          _mesa_error(ctx, GL_INVALID_ENUM,
1448                      "glGetFramebufferAttachmentParameterivEXT(target)");
1449          return;
1450       }
1451       buffer = ctx->DrawBuffer;
1452       break;
1453    case GL_READ_FRAMEBUFFER_EXT:
1454       if (!ctx->Extensions.EXT_framebuffer_blit) {
1455          _mesa_error(ctx, GL_INVALID_ENUM,
1456                      "glGetFramebufferAttachmentParameterivEXT(target)");
1457          return;
1458       }
1459       buffer = ctx->ReadBuffer;
1460       break;
1461 #endif
1462    case GL_FRAMEBUFFER_EXT:
1463       buffer = ctx->DrawBuffer;
1464       break;
1465    default:
1466       _mesa_error(ctx, GL_INVALID_ENUM,
1467                   "glGetFramebufferAttachmentParameterivEXT(target)");
1468       return;
1469    }
1470
1471    if (buffer->Name == 0) {
1472       _mesa_error(ctx, GL_INVALID_OPERATION,
1473                   "glGetFramebufferAttachmentParameterivEXT");
1474       return;
1475    }
1476
1477    att = _mesa_get_attachment(ctx, buffer, attachment);
1478    if (att == NULL) {
1479       _mesa_error(ctx, GL_INVALID_ENUM,
1480                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1481       return;
1482    }
1483
1484    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1485    /* The above doesn't fully flush the drivers in the way that a
1486     * glFlush does, but that is required here:
1487     */
1488    if (ctx->Driver.Flush)
1489       ctx->Driver.Flush(ctx);
1490
1491    switch (pname) {
1492    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
1493       *params = att->Type;
1494       return;
1495    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
1496       if (att->Type == GL_RENDERBUFFER_EXT) {
1497          *params = att->Renderbuffer->Name;
1498       }
1499       else if (att->Type == GL_TEXTURE) {
1500          *params = att->Texture->Name;
1501       }
1502       else {
1503          _mesa_error(ctx, GL_INVALID_ENUM,
1504                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1505       }
1506       return;
1507    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
1508       if (att->Type == GL_TEXTURE) {
1509          *params = att->TextureLevel;
1510       }
1511       else {
1512          _mesa_error(ctx, GL_INVALID_ENUM,
1513                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1514       }
1515       return;
1516    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
1517       if (att->Type == GL_TEXTURE) {
1518          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
1519             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
1520          }
1521          else {
1522             *params = 0;
1523          }
1524       }
1525       else {
1526          _mesa_error(ctx, GL_INVALID_ENUM,
1527                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1528       }
1529       return;
1530    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT:
1531       if (att->Type == GL_TEXTURE) {
1532          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
1533             *params = att->Zoffset;
1534          }
1535          else {
1536             *params = 0;
1537          }
1538       }
1539       else {
1540          _mesa_error(ctx, GL_INVALID_ENUM,
1541                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1542       }
1543       return;
1544    default:
1545       _mesa_error(ctx, GL_INVALID_ENUM,
1546                   "glGetFramebufferAttachmentParameterivEXT(pname)");
1547       return;
1548    }
1549 }
1550
1551
1552 void GLAPIENTRY
1553 _mesa_GenerateMipmapEXT(GLenum target)
1554 {
1555    struct gl_texture_unit *texUnit;
1556    struct gl_texture_object *texObj;
1557    GET_CURRENT_CONTEXT(ctx);
1558
1559    ASSERT_OUTSIDE_BEGIN_END(ctx);
1560    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1561
1562    switch (target) {
1563    case GL_TEXTURE_1D:
1564    case GL_TEXTURE_2D:
1565    case GL_TEXTURE_3D:
1566    case GL_TEXTURE_CUBE_MAP:
1567       /* OK, legal value */
1568       break;
1569    default:
1570       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
1571       return;
1572    }
1573
1574    texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
1575    texObj = _mesa_select_tex_object(ctx, texUnit, target);
1576
1577    _mesa_lock_texture(ctx, texObj);
1578    if (target == GL_TEXTURE_CUBE_MAP) {
1579       int face;
1580
1581       for (face = 0; face < 6; face++)
1582          ctx->Driver.GenerateMipmap(ctx,
1583                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
1584                                     texObj);
1585    } else {
1586       ctx->Driver.GenerateMipmap(ctx, target, texObj);
1587    }
1588    _mesa_unlock_texture(ctx, texObj);
1589 }
1590
1591
1592 #if FEATURE_EXT_framebuffer_blit
1593 void GLAPIENTRY
1594 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
1595                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
1596                          GLbitfield mask, GLenum filter)
1597 {
1598    GET_CURRENT_CONTEXT(ctx);
1599
1600    ASSERT_OUTSIDE_BEGIN_END(ctx);
1601    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1602
1603    if (ctx->NewState) {
1604       _mesa_update_state(ctx);
1605    }
1606
1607    if (!ctx->ReadBuffer) {
1608       /* XXX */
1609    }
1610
1611    /* check for complete framebuffers */
1612    if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
1613        ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
1614       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
1615                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
1616       return;
1617    }
1618
1619    if (filter != GL_NEAREST && filter != GL_LINEAR) {
1620       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
1621       return;
1622    }
1623
1624    if (mask & ~(GL_COLOR_BUFFER_BIT |
1625                 GL_DEPTH_BUFFER_BIT |
1626                 GL_STENCIL_BUFFER_BIT)) {
1627       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
1628       return;
1629    }
1630
1631    /* depth/stencil must be blitted with nearest filtering */
1632    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
1633         && filter != GL_NEAREST) {
1634       _mesa_error(ctx, GL_INVALID_OPERATION,
1635              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
1636       return;
1637    }
1638
1639    if (mask & GL_STENCIL_BUFFER_BIT) {
1640       struct gl_renderbuffer *readRb = ctx->ReadBuffer->_StencilBuffer;
1641       struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_StencilBuffer;
1642       if (readRb->StencilBits != drawRb->StencilBits) {
1643          _mesa_error(ctx, GL_INVALID_OPERATION,
1644                      "glBlitFramebufferEXT(stencil buffer size mismatch");
1645          return;
1646       }
1647    }
1648
1649    if (mask & GL_DEPTH_BUFFER_BIT) {
1650       struct gl_renderbuffer *readRb = ctx->ReadBuffer->_DepthBuffer;
1651       struct gl_renderbuffer *drawRb = ctx->DrawBuffer->_DepthBuffer;
1652       if (readRb->DepthBits != drawRb->DepthBits) {
1653          _mesa_error(ctx, GL_INVALID_OPERATION,
1654                      "glBlitFramebufferEXT(depth buffer size mismatch");
1655          return;
1656       }
1657    }
1658
1659    if (!ctx->Extensions.EXT_framebuffer_blit) {
1660       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
1661       return;
1662    }
1663
1664    ASSERT(ctx->Driver.BlitFramebuffer);
1665    ctx->Driver.BlitFramebuffer(ctx,
1666                                srcX0, srcY0, srcX1, srcY1,
1667                                dstX0, dstY0, dstX1, dstY1,
1668                                mask, filter);
1669 }
1670 #endif /* FEATURE_EXT_framebuffer_blit */