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  * XXX in the future when we support red-only and red-green formats
 863  * we'll also return GL_RED and GL_RG.
 864  */
 865 GLenum
 866 _mesa_base_fbo_format(GLcontext *ctx, GLenum internalFormat)
 867 {
 868    switch (internalFormat) {
 869    case GL_RGB:
 870    case GL_R3_G3_B2:
 871    case GL_RGB4:
 872    case GL_RGB5:
 873    case GL_RGB8:
 874    case GL_RGB10:
 875    case GL_RGB12:
 876    case GL_RGB16:
 877       return GL_RGB;
 878    case GL_RGBA:
 879    case GL_RGBA2:
 880    case GL_RGBA4:
 881    case GL_RGB5_A1:
 882    case GL_RGBA8:
 883    case GL_RGB10_A2:
 884    case GL_RGBA12:
 885    case GL_RGBA16:
 886       return GL_RGBA;
 887    case GL_STENCIL_INDEX:
 888    case GL_STENCIL_INDEX1_EXT:
 889    case GL_STENCIL_INDEX4_EXT:
 890    case GL_STENCIL_INDEX8_EXT:
 891    case GL_STENCIL_INDEX16_EXT:
 892       return GL_STENCIL_INDEX;
 893    case GL_DEPTH_COMPONENT:
 894    case GL_DEPTH_COMPONENT16:
 895    case GL_DEPTH_COMPONENT24:
 896    case GL_DEPTH_COMPONENT32:
 897       return GL_DEPTH_COMPONENT;
 898    case GL_DEPTH_STENCIL_EXT:
 899    case GL_DEPTH24_STENCIL8_EXT:
 900       if (ctx->Extensions.EXT_packed_depth_stencil)
 901          return GL_DEPTH_STENCIL_EXT;
 902       else
 903          return 0;
 904    /* XXX add floating point formats eventually */
 905    default:
 906       return 0;
 907    }
 908 }
 909
 910
 911 /** sentinal value, see below */
 912 #define NO_SAMPLES 1000
 913
 914
 915 /**
 916  * Helper function used by _mesa_RenderbufferStorageEXT() and
 917  * _mesa_RenderbufferStorageMultisample().
 918  * samples will be NO_SAMPLES if called by _mesa_RenderbufferStorageEXT().
 919  */
 920 static void
 921 renderbuffer_storage(GLenum target, GLenum internalFormat,
 922                      GLsizei width, GLsizei height, GLsizei samples)
 923 {
 924    const char *func = samples == NO_SAMPLES ?
 925       "glRenderbufferStorage" : "RenderbufferStorageMultisample";
 926    struct gl_renderbuffer *rb;
 927    GLenum baseFormat;
 928    GET_CURRENT_CONTEXT(ctx);
 929
 930    ASSERT_OUTSIDE_BEGIN_END(ctx);
 931
 932    if (target != GL_RENDERBUFFER_EXT) {
 933       _mesa_error(ctx, GL_INVALID_ENUM, "%s(target)", func);
 934       return;
 935    }
 936
 937    baseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 938    if (baseFormat == 0) {
 939       _mesa_error(ctx, GL_INVALID_ENUM, "%s(internalFormat)", func);
 940       return;
 941    }
 942
 943    if (width < 1 || width > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 944       _mesa_error(ctx, GL_INVALID_VALUE, "%s(width)", func);
 945       return;
 946    }
 947
 948    if (height < 1 || height > (GLsizei) ctx->Const.MaxRenderbufferSize) {
 949       _mesa_error(ctx, GL_INVALID_VALUE, "%s(height)", func);
 950       return;
 951    }
 952
 953    if (samples == NO_SAMPLES) {
 954       /* NumSamples == 0 indicates non-multisampling */
 955       samples = 0;
 956    }
 957    else if (samples > ctx->Const.MaxSamples) {
 958       /* note: driver may choose to use more samples than what's requested */
 959       _mesa_error(ctx, GL_INVALID_VALUE, "%s(samples)", func);
 960       return;
 961    }
 962
 963    rb = ctx->CurrentRenderbuffer;
 964    if (!rb) {
 965       _mesa_error(ctx, GL_INVALID_OPERATION, func);
 966       return;
 967    }
 968
 969    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
 970
 971    if (rb->InternalFormat == internalFormat &&
 972        rb->Width == (GLuint) width &&
 973        rb->Height == (GLuint) height) {
 974       /* no change in allocation needed */
 975       return;
 976    }
 977
 978    /* These MUST get set by the AllocStorage func */
 979    rb->Format = MESA_FORMAT_NONE;
 980    rb->NumSamples = samples;
 981
 982    /* Now allocate the storage */
 983    ASSERT(rb->AllocStorage);
 984    if (rb->AllocStorage(ctx, rb, internalFormat, width, height)) {
 985       /* No error - check/set fields now */
 986       assert(rb->Format != MESA_FORMAT_NONE);
 987       assert(rb->Width == (GLuint) width);
 988       assert(rb->Height == (GLuint) height);
 989       rb->InternalFormat = internalFormat;
 990       rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
 991       assert(rb->_BaseFormat != 0);
 992    }
 993    else {
 994       /* Probably ran out of memory - clear the fields */
 995       rb->Width = 0;
 996       rb->Height = 0;
 997       rb->Format = MESA_FORMAT_NONE;
 998       rb->InternalFormat = GL_NONE;
 999       rb->_BaseFormat = GL_NONE;
1000       rb->NumSamples = 0;
1001    }
1002
1003    /*
1004    test_framebuffer_completeness(ctx, fb);
1005    */
1006    /* XXX if this renderbuffer is attached anywhere, invalidate attachment
1007     * points???
1008     */
1009 }
1010
1011
1012 /**
1013  * Helper function for _mesa_GetRenderbufferParameterivEXT() and
1014  * _mesa_GetFramebufferAttachmentParameterivEXT()
1015  * We have to be careful to respect the base format.  For example, if a
1016  * renderbuffer/texture was created with internalFormat=GL_RGB but the
1017  * driver actually chose a GL_RGBA format, when the user queries ALPHA_SIZE
1018  * we need to return zero.
1019  */
1020 static GLint
1021 get_component_bits(GLenum pname, GLenum baseFormat, gl_format format)
1022 {
1023    switch (pname) {
1024    case GL_RENDERBUFFER_RED_SIZE_EXT:
1025    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1026    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1027    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1028    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1029    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1030       if (baseFormat == GL_RGB || baseFormat == GL_RGBA)
1031          return _mesa_get_format_bits(format, pname);
1032       else
1033          return 0;
1034    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1035    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1036       if (baseFormat == GL_RGBA || baseFormat == GL_ALPHA)
1037          return _mesa_get_format_bits(format, pname);
1038       else
1039          return 0;
1040    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1041    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1042       if (baseFormat == GL_DEPTH_COMPONENT || baseFormat == GL_DEPTH_STENCIL)
1043          return _mesa_get_format_bits(format, pname);
1044       else
1045          return 0;
1046    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1047    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1048       if (baseFormat == GL_STENCIL_INDEX || baseFormat == GL_DEPTH_STENCIL)
1049          return _mesa_get_format_bits(format, pname);
1050       else
1051          return 0;
1052    default:
1053       return 0;
1054    }
1055 }
1056
1057
1058
1059 void GLAPIENTRY
1060 _mesa_RenderbufferStorageEXT(GLenum target, GLenum internalFormat,
1061                              GLsizei width, GLsizei height)
1062 {
1063    /* GL_ARB_fbo says calling this function is equivalent to calling
1064     * glRenderbufferStorageMultisample() with samples=0.  We pass in
1065     * a token value here just for error reporting purposes.
1066     */
1067    renderbuffer_storage(target, internalFormat, width, height, NO_SAMPLES);
1068 }
1069
1070
1071 void GLAPIENTRY
1072 _mesa_RenderbufferStorageMultisample(GLenum target, GLsizei samples,
1073                                      GLenum internalFormat,
1074                                      GLsizei width, GLsizei height)
1075 {
1076    renderbuffer_storage(target, internalFormat, width, height, samples);
1077 }
1078
1079
1080
1081 void GLAPIENTRY
1082 _mesa_GetRenderbufferParameterivEXT(GLenum target, GLenum pname, GLint *params)
1083 {
1084    struct gl_renderbuffer *rb;
1085    GET_CURRENT_CONTEXT(ctx);
1086
1087    ASSERT_OUTSIDE_BEGIN_END(ctx);
1088
1089    if (target != GL_RENDERBUFFER_EXT) {
1090       _mesa_error(ctx, GL_INVALID_ENUM,
1091                   "glGetRenderbufferParameterivEXT(target)");
1092       return;
1093    }
1094
1095    rb = ctx->CurrentRenderbuffer;
1096    if (!rb) {
1097       _mesa_error(ctx, GL_INVALID_OPERATION,
1098                   "glGetRenderbufferParameterivEXT");
1099       return;
1100    }
1101
1102    /* No need to flush here since we're just quering state which is
1103     * not effected by rendering.
1104     */
1105
1106    switch (pname) {
1107    case GL_RENDERBUFFER_WIDTH_EXT:
1108       *params = rb->Width;
1109       return;
1110    case GL_RENDERBUFFER_HEIGHT_EXT:
1111       *params = rb->Height;
1112       return;
1113    case GL_RENDERBUFFER_INTERNAL_FORMAT_EXT:
1114       *params = rb->InternalFormat;
1115       return;
1116    case GL_RENDERBUFFER_RED_SIZE_EXT:
1117    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1118    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1119    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1120    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1121    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1122       *params = get_component_bits(pname, rb->_BaseFormat, rb->Format);
1123       break;
1124    case GL_RENDERBUFFER_SAMPLES:
1125       if (ctx->Extensions.ARB_framebuffer_object) {
1126          *params = rb->NumSamples;
1127          break;
1128       }
1129       /* fallthrough */
1130    default:
1131       _mesa_error(ctx, GL_INVALID_ENUM,
1132                   "glGetRenderbufferParameterivEXT(target)");
1133       return;
1134    }
1135 }
1136
1137
1138 GLboolean GLAPIENTRY
1139 _mesa_IsFramebufferEXT(GLuint framebuffer)
1140 {
1141    GET_CURRENT_CONTEXT(ctx);
1142    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
1143    if (framebuffer) {
1144       struct gl_framebuffer *rb = _mesa_lookup_framebuffer(ctx, framebuffer);
1145       if (rb != NULL && rb != &DummyFramebuffer)
1146          return GL_TRUE;
1147    }
1148    return GL_FALSE;
1149 }
1150
1151
1152 /**
1153  * Check if any of the attachments of the given framebuffer are textures
1154  * (render to texture).  Call ctx->Driver.RenderTexture() for such
1155  * attachments.
1156  */
1157 static void
1158 check_begin_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1159 {
1160    GLuint i;
1161    ASSERT(ctx->Driver.RenderTexture);
1162
1163    if (fb->Name == 0)
1164       return; /* can't render to texture with winsys framebuffers */
1165
1166    for (i = 0; i < BUFFER_COUNT; i++) {
1167       struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1168       struct gl_texture_object *texObj = att->Texture;
1169       if (texObj
1170           && texObj->Image[att->CubeMapFace][att->TextureLevel]) {
1171          ctx->Driver.RenderTexture(ctx, fb, att);
1172       }
1173    }
1174 }
1175
1176
1177 /**
1178  * Examine all the framebuffer's attachments to see if any are textures.
1179  * If so, call ctx->Driver.FinishRenderTexture() for each texture to
1180  * notify the device driver that the texture image may have changed.
1181  */
1182 static void
1183 check_end_texture_render(GLcontext *ctx, struct gl_framebuffer *fb)
1184 {
1185    if (fb->Name == 0)
1186       return; /* can't render to texture with winsys framebuffers */
1187
1188    if (ctx->Driver.FinishRenderTexture) {
1189       GLuint i;
1190       for (i = 0; i < BUFFER_COUNT; i++) {
1191          struct gl_renderbuffer_attachment *att = fb->Attachment + i;
1192          if (att->Texture && att->Renderbuffer) {
1193             ctx->Driver.FinishRenderTexture(ctx, att);
1194          }
1195       }
1196    }
1197 }
1198
1199
1200 void GLAPIENTRY
1201 _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
1202 {
1203    struct gl_framebuffer *newDrawFb, *newReadFb;
1204    struct gl_framebuffer *oldDrawFb, *oldReadFb;
1205    GLboolean bindReadBuf, bindDrawBuf;
1206    GET_CURRENT_CONTEXT(ctx);
1207
1208 #ifdef DEBUG
1209    if (ctx->Extensions.ARB_framebuffer_object) {
1210       ASSERT(ctx->Extensions.EXT_framebuffer_object);
1211       ASSERT(ctx->Extensions.EXT_framebuffer_blit);
1212    }
1213 #endif
1214
1215    ASSERT_OUTSIDE_BEGIN_END(ctx);
1216
1217    if (!ctx->Extensions.EXT_framebuffer_object) {
1218       _mesa_error(ctx, GL_INVALID_OPERATION,
1219                   "glBindFramebufferEXT(unsupported)");
1220       return;
1221    }
1222
1223    switch (target) {
1224 #if FEATURE_EXT_framebuffer_blit
1225    case GL_DRAW_FRAMEBUFFER_EXT:
1226       if (!ctx->Extensions.EXT_framebuffer_blit) {
1227          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1228          return;
1229       }
1230       bindDrawBuf = GL_TRUE;
1231       bindReadBuf = GL_FALSE;
1232       break;
1233    case GL_READ_FRAMEBUFFER_EXT:
1234       if (!ctx->Extensions.EXT_framebuffer_blit) {
1235          _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1236          return;
1237       }
1238       bindDrawBuf = GL_FALSE;
1239       bindReadBuf = GL_TRUE;
1240       break;
1241 #endif
1242    case GL_FRAMEBUFFER_EXT:
1243       bindDrawBuf = GL_TRUE;
1244       bindReadBuf = GL_TRUE;
1245       break;
1246    default:
1247       _mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
1248       return;
1249    }
1250
1251    if (framebuffer) {
1252       /* Binding a user-created framebuffer object */
1253       newDrawFb = _mesa_lookup_framebuffer(ctx, framebuffer);
1254       if (newDrawFb == &DummyFramebuffer) {
1255          /* ID was reserved, but no real framebuffer object made yet */
1256          newDrawFb = NULL;
1257       }
1258       else if (!newDrawFb && ctx->Extensions.ARB_framebuffer_object) {
1259          /* All FBO IDs must be Gen'd */
1260          _mesa_error(ctx, GL_INVALID_OPERATION, "glBindFramebuffer(buffer)");
1261          return;
1262       }
1263
1264       if (!newDrawFb) {
1265          /* create new framebuffer object */
1266          newDrawFb = ctx->Driver.NewFramebuffer(ctx, framebuffer);
1267          if (!newDrawFb) {
1268             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindFramebufferEXT");
1269             return;
1270          }
1271          _mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newDrawFb);
1272       }
1273       newReadFb = newDrawFb;
1274    }
1275    else {
1276       /* Binding the window system framebuffer (which was originally set
1277        * with MakeCurrent).
1278        */
1279       newDrawFb = ctx->WinSysDrawBuffer;
1280       newReadFb = ctx->WinSysReadBuffer;
1281    }
1282
1283    ASSERT(newDrawFb);
1284    ASSERT(newDrawFb != &DummyFramebuffer);
1285
1286    /* save pointers to current/old framebuffers */
1287    oldDrawFb = ctx->DrawBuffer;
1288    oldReadFb = ctx->ReadBuffer;
1289
1290    /* check if really changing bindings */
1291    if (oldDrawFb == newDrawFb)
1292       bindDrawBuf = GL_FALSE;
1293    if (oldReadFb == newReadFb)
1294       bindReadBuf = GL_FALSE;
1295
1296    /*
1297     * OK, now bind the new Draw/Read framebuffers, if they're changing.
1298     *
1299     * We also check if we're beginning and/or ending render-to-texture.
1300     * When a framebuffer with texture attachments is unbound, call
1301     * ctx->Driver.FinishRenderTexture().
1302     * When a framebuffer with texture attachments is bound, call
1303     * ctx->Driver.RenderTexture().
1304     *
1305     * Note that if the ReadBuffer has texture attachments we don't consider
1306     * that a render-to-texture case.
1307     */
1308    if (bindReadBuf) {
1309       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1310
1311       /* check if old readbuffer was render-to-texture */
1312       check_end_texture_render(ctx, oldReadFb);
1313
1314       _mesa_reference_framebuffer(&ctx->ReadBuffer, newReadFb);
1315    }
1316
1317    if (bindDrawBuf) {
1318       FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1319
1320       /* check if old read/draw buffers were render-to-texture */
1321       if (!bindReadBuf)
1322          check_end_texture_render(ctx, oldReadFb);
1323
1324       if (oldDrawFb != oldReadFb)
1325          check_end_texture_render(ctx, oldDrawFb);
1326
1327       /* check if newly bound framebuffer has any texture attachments */
1328       check_begin_texture_render(ctx, newDrawFb);
1329
1330       _mesa_reference_framebuffer(&ctx->DrawBuffer, newDrawFb);
1331    }
1332
1333    if ((bindDrawBuf || bindReadBuf) && ctx->Driver.BindFramebuffer) {
1334       ctx->Driver.BindFramebuffer(ctx, target, newDrawFb, newReadFb);
1335    }
1336 }
1337
1338
1339 void GLAPIENTRY
1340 _mesa_DeleteFramebuffersEXT(GLsizei n, const GLuint *framebuffers)
1341 {
1342    GLint i;
1343    GET_CURRENT_CONTEXT(ctx);
1344
1345    ASSERT_OUTSIDE_BEGIN_END(ctx);
1346    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1347
1348    for (i = 0; i < n; i++) {
1349       if (framebuffers[i] > 0) {
1350          struct gl_framebuffer *fb;
1351          fb = _mesa_lookup_framebuffer(ctx, framebuffers[i]);
1352          if (fb) {
1353             ASSERT(fb == &DummyFramebuffer || fb->Name == framebuffers[i]);
1354
1355             /* check if deleting currently bound framebuffer object */
1356             if (ctx->Extensions.EXT_framebuffer_blit) {
1357                /* separate draw/read binding points */
1358                if (fb == ctx->DrawBuffer) {
1359                   /* bind default */
1360                   ASSERT(fb->RefCount >= 2);
1361                   _mesa_BindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
1362                }
1363                if (fb == ctx->ReadBuffer) {
1364                   /* bind default */
1365                   ASSERT(fb->RefCount >= 2);
1366                   _mesa_BindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, 0);
1367                }
1368             }
1369             else {
1370                /* only one binding point for read/draw buffers */
1371                if (fb == ctx->DrawBuffer || fb == ctx->ReadBuffer) {
1372                   /* bind default */
1373                   ASSERT(fb->RefCount >= 2);
1374                   _mesa_BindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
1375                }
1376             }
1377
1378             /* remove from hash table immediately, to free the ID */
1379             _mesa_HashRemove(ctx->Shared->FrameBuffers, framebuffers[i]);
1380
1381             if (fb != &DummyFramebuffer) {
1382                /* But the object will not be freed until it's no longer
1383                 * bound in any context.
1384                 */
1385                _mesa_reference_framebuffer(&fb, NULL);
1386             }
1387          }
1388       }
1389    }
1390 }
1391
1392
1393 void GLAPIENTRY
1394 _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
1395 {
1396    GET_CURRENT_CONTEXT(ctx);
1397    GLuint first;
1398    GLint i;
1399
1400    ASSERT_OUTSIDE_BEGIN_END(ctx);
1401
1402    if (n < 0) {
1403       _mesa_error(ctx, GL_INVALID_VALUE, "glGenFramebuffersEXT(n)");
1404       return;
1405    }
1406
1407    if (!framebuffers)
1408       return;
1409
1410    first = _mesa_HashFindFreeKeyBlock(ctx->Shared->FrameBuffers, n);
1411
1412    for (i = 0; i < n; i++) {
1413       GLuint name = first + i;
1414       framebuffers[i] = name;
1415       /* insert dummy placeholder into hash table */
1416       _glthread_LOCK_MUTEX(ctx->Shared->Mutex);
1417       _mesa_HashInsert(ctx->Shared->FrameBuffers, name, &DummyFramebuffer);
1418       _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
1419    }
1420 }
1421
1422
1423
1424 GLenum GLAPIENTRY
1425 _mesa_CheckFramebufferStatusEXT(GLenum target)
1426 {
1427    struct gl_framebuffer *buffer;
1428    GET_CURRENT_CONTEXT(ctx);
1429
1430    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
1431
1432    switch (target) {
1433 #if FEATURE_EXT_framebuffer_blit
1434    case GL_DRAW_FRAMEBUFFER_EXT:
1435       if (!ctx->Extensions.EXT_framebuffer_blit) {
1436          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1437          return 0;
1438       }
1439       buffer = ctx->DrawBuffer;
1440       break;
1441    case GL_READ_FRAMEBUFFER_EXT:
1442       if (!ctx->Extensions.EXT_framebuffer_blit) {
1443          _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1444          return 0;
1445       }
1446       buffer = ctx->ReadBuffer;
1447       break;
1448 #endif
1449    case GL_FRAMEBUFFER_EXT:
1450       buffer = ctx->DrawBuffer;
1451       break;
1452    default:
1453       _mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
1454       return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
1455    }
1456
1457    if (buffer->Name == 0) {
1458       /* The window system / default framebuffer is always complete */
1459       return GL_FRAMEBUFFER_COMPLETE_EXT;
1460    }
1461
1462    /* No need to flush here */
1463
1464    if (buffer->_Status != GL_FRAMEBUFFER_COMPLETE) {
1465       _mesa_test_framebuffer_completeness(ctx, buffer);
1466    }
1467
1468    return buffer->_Status;
1469 }
1470
1471
1472
1473 /**
1474  * Common code called by glFramebufferTexture1D/2D/3DEXT().
1475  */
1476 static void
1477 framebuffer_texture(GLcontext *ctx, const char *caller, GLenum target,
1478                     GLenum attachment, GLenum textarget, GLuint texture,
1479                     GLint level, GLint zoffset)
1480 {
1481    struct gl_renderbuffer_attachment *att;
1482    struct gl_texture_object *texObj = NULL;
1483    struct gl_framebuffer *fb;
1484    GLboolean error = GL_FALSE;
1485
1486    ASSERT_OUTSIDE_BEGIN_END(ctx);
1487
1488    switch (target) {
1489    case GL_READ_FRAMEBUFFER_EXT:
1490       error = !ctx->Extensions.EXT_framebuffer_blit;
1491       fb = ctx->ReadBuffer;
1492       break;
1493    case GL_DRAW_FRAMEBUFFER_EXT:
1494       error = !ctx->Extensions.EXT_framebuffer_blit;
1495       /* fall-through */
1496    case GL_FRAMEBUFFER_EXT:
1497       fb = ctx->DrawBuffer;
1498       break;
1499    default:
1500       error = GL_TRUE;
1501    }
1502
1503    if (error) {
1504       _mesa_error(ctx, GL_INVALID_ENUM,
1505                   "glFramebufferTexture%sEXT(target=0x%x)", caller, target);
1506       return;
1507    }
1508
1509    ASSERT(fb);
1510
1511    /* check framebuffer binding */
1512    if (fb->Name == 0) {
1513       _mesa_error(ctx, GL_INVALID_OPERATION,
1514                   "glFramebufferTexture%sEXT", caller);
1515       return;
1516    }
1517
1518
1519    /* The textarget, level, and zoffset parameters are only validated if
1520     * texture is non-zero.
1521     */
1522    if (texture) {
1523       GLboolean err = GL_TRUE;
1524
1525       texObj = _mesa_lookup_texture(ctx, texture);
1526       if (texObj != NULL) {
1527          if (textarget == 0) {
1528             err = (texObj->Target != GL_TEXTURE_3D) &&
1529                 (texObj->Target != GL_TEXTURE_1D_ARRAY_EXT) &&
1530                 (texObj->Target != GL_TEXTURE_2D_ARRAY_EXT);
1531          }
1532          else {
1533             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
1534                 ? !IS_CUBE_FACE(textarget)
1535                 : (texObj->Target != textarget);
1536          }
1537       }
1538
1539       if (err) {
1540          _mesa_error(ctx, GL_INVALID_OPERATION,
1541                      "glFramebufferTexture%sEXT(texture target mismatch)",
1542                      caller);
1543          return;
1544       }
1545
1546       if (texObj->Target == GL_TEXTURE_3D) {
1547          const GLint maxSize = 1 << (ctx->Const.Max3DTextureLevels - 1);
1548          if (zoffset < 0 || zoffset >= maxSize) {
1549             _mesa_error(ctx, GL_INVALID_VALUE,
1550                         "glFramebufferTexture%sEXT(zoffset)", caller);
1551             return;
1552          }
1553       }
1554       else if ((texObj->Target == GL_TEXTURE_1D_ARRAY_EXT) ||
1555                (texObj->Target == GL_TEXTURE_2D_ARRAY_EXT)) {
1556          if (zoffset < 0 || zoffset >= ctx->Const.MaxArrayTextureLayers) {
1557             _mesa_error(ctx, GL_INVALID_VALUE,
1558                         "glFramebufferTexture%sEXT(layer)", caller);
1559             return;
1560          }
1561       }
1562
1563       if ((level < 0) ||
1564           (level >= _mesa_max_texture_levels(ctx, texObj->Target))) {
1565          _mesa_error(ctx, GL_INVALID_VALUE,
1566                      "glFramebufferTexture%sEXT(level)", caller);
1567          return;
1568       }
1569    }
1570
1571    att = _mesa_get_attachment(ctx, fb, attachment);
1572    if (att == NULL) {
1573       _mesa_error(ctx, GL_INVALID_ENUM,
1574                   "glFramebufferTexture%sEXT(attachment)", caller);
1575       return;
1576    }
1577
1578    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1579
1580    _glthread_LOCK_MUTEX(fb->Mutex);
1581    if (texObj) {
1582       _mesa_set_texture_attachment(ctx, fb, att, texObj, textarget,
1583                                    level, zoffset);
1584       /* Set the render-to-texture flag.  We'll check this flag in
1585        * glTexImage() and friends to determine if we need to revalidate
1586        * any FBOs that might be rendering into this texture.
1587        * This flag never gets cleared since it's non-trivial to determine
1588        * when all FBOs might be done rendering to this texture.  That's OK
1589        * though since it's uncommon to render to a texture then repeatedly
1590        * call glTexImage() to change images in the texture.
1591        */
1592       texObj->_RenderToTexture = GL_TRUE;
1593    }
1594    else {
1595       _mesa_remove_attachment(ctx, att);
1596    }
1597
1598    invalidate_framebuffer(fb);
1599
1600    _glthread_UNLOCK_MUTEX(fb->Mutex);
1601 }
1602
1603
1604
1605 void GLAPIENTRY
1606 _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
1607                               GLenum textarget, GLuint texture, GLint level)
1608 {
1609    GET_CURRENT_CONTEXT(ctx);
1610
1611    if ((texture != 0) && (textarget != GL_TEXTURE_1D)) {
1612       _mesa_error(ctx, GL_INVALID_ENUM,
1613                   "glFramebufferTexture1DEXT(textarget)");
1614       return;
1615    }
1616
1617    framebuffer_texture(ctx, "1D", target, attachment, textarget, texture,
1618                        level, 0);
1619 }
1620
1621
1622 void GLAPIENTRY
1623 _mesa_FramebufferTexture2DEXT(GLenum target, GLenum attachment,
1624                               GLenum textarget, GLuint texture, GLint level)
1625 {
1626    GET_CURRENT_CONTEXT(ctx);
1627
1628    if ((texture != 0) &&
1629        (textarget != GL_TEXTURE_2D) &&
1630        (textarget != GL_TEXTURE_RECTANGLE_ARB) &&
1631        (!IS_CUBE_FACE(textarget))) {
1632       _mesa_error(ctx, GL_INVALID_OPERATION,
1633                   "glFramebufferTexture2DEXT(textarget=0x%x)", textarget);
1634       return;
1635    }
1636
1637    framebuffer_texture(ctx, "2D", target, attachment, textarget, texture,
1638                        level, 0);
1639 }
1640
1641
1642 void GLAPIENTRY
1643 _mesa_FramebufferTexture3DEXT(GLenum target, GLenum attachment,
1644                               GLenum textarget, GLuint texture,
1645                               GLint level, GLint zoffset)
1646 {
1647    GET_CURRENT_CONTEXT(ctx);
1648
1649    if ((texture != 0) && (textarget != GL_TEXTURE_3D)) {
1650       _mesa_error(ctx, GL_INVALID_ENUM,
1651                   "glFramebufferTexture3DEXT(textarget)");
1652       return;
1653    }
1654
1655    framebuffer_texture(ctx, "3D", target, attachment, textarget, texture,
1656                        level, zoffset);
1657 }
1658
1659
1660 void GLAPIENTRY
1661 _mesa_FramebufferTextureLayerEXT(GLenum target, GLenum attachment,
1662                                  GLuint texture, GLint level, GLint layer)
1663 {
1664    GET_CURRENT_CONTEXT(ctx);
1665
1666    framebuffer_texture(ctx, "Layer", target, attachment, 0, texture,
1667                        level, layer);
1668 }
1669
1670
1671 void GLAPIENTRY
1672 _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
1673                                  GLenum renderbufferTarget,
1674                                  GLuint renderbuffer)
1675 {
1676    struct gl_renderbuffer_attachment *att;
1677    struct gl_framebuffer *fb;
1678    struct gl_renderbuffer *rb;
1679    GET_CURRENT_CONTEXT(ctx);
1680
1681    ASSERT_OUTSIDE_BEGIN_END(ctx);
1682
1683    switch (target) {
1684 #if FEATURE_EXT_framebuffer_blit
1685    case GL_DRAW_FRAMEBUFFER_EXT:
1686       if (!ctx->Extensions.EXT_framebuffer_blit) {
1687          _mesa_error(ctx, GL_INVALID_ENUM,
1688                      "glFramebufferRenderbufferEXT(target)");
1689          return;
1690       }
1691       fb = ctx->DrawBuffer;
1692       break;
1693    case GL_READ_FRAMEBUFFER_EXT:
1694       if (!ctx->Extensions.EXT_framebuffer_blit) {
1695          _mesa_error(ctx, GL_INVALID_ENUM,
1696                      "glFramebufferRenderbufferEXT(target)");
1697          return;
1698       }
1699       fb = ctx->ReadBuffer;
1700       break;
1701 #endif
1702    case GL_FRAMEBUFFER_EXT:
1703       fb = ctx->DrawBuffer;
1704       break;
1705    default:
1706       _mesa_error(ctx, GL_INVALID_ENUM,
1707                   "glFramebufferRenderbufferEXT(target)");
1708       return;
1709    }
1710
1711    if (renderbufferTarget != GL_RENDERBUFFER_EXT) {
1712       _mesa_error(ctx, GL_INVALID_ENUM,
1713                   "glFramebufferRenderbufferEXT(renderbufferTarget)");
1714       return;
1715    }
1716
1717    if (fb->Name == 0) {
1718       /* Can't attach new renderbuffers to a window system framebuffer */
1719       _mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
1720       return;
1721    }
1722
1723    att = _mesa_get_attachment(ctx, fb, attachment);
1724    if (att == NULL) {
1725       _mesa_error(ctx, GL_INVALID_ENUM,
1726                   "glFramebufferRenderbufferEXT(invalid attachment %s)",
1727                   _mesa_lookup_enum_by_nr(attachment));
1728       return;
1729    }
1730
1731    if (renderbuffer) {
1732       rb = _mesa_lookup_renderbuffer(ctx, renderbuffer);
1733       if (!rb) {
1734          _mesa_error(ctx, GL_INVALID_OPERATION,
1735                      "glFramebufferRenderbufferEXT(non-existant"
1736                      " renderbuffer %u)", renderbuffer);
1737          return;
1738       }
1739    }
1740    else {
1741       /* remove renderbuffer attachment */
1742       rb = NULL;
1743    }
1744
1745    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1746       /* make sure the renderbuffer is a depth/stencil format */
1747       const GLenum baseFormat =
1748          _mesa_get_format_base_format(att->Renderbuffer->Format);
1749       if (baseFormat != GL_DEPTH_STENCIL) {
1750          _mesa_error(ctx, GL_INVALID_OPERATION,
1751                      "glFramebufferRenderbufferEXT(renderbuffer"
1752                      " is not DEPTH_STENCIL format)");
1753          return;
1754       }
1755    }
1756
1757
1758    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1759
1760    assert(ctx->Driver.FramebufferRenderbuffer);
1761    ctx->Driver.FramebufferRenderbuffer(ctx, fb, attachment, rb);
1762
1763    /* Some subsequent GL commands may depend on the framebuffer's visual
1764     * after the binding is updated.  Update visual info now.
1765     */
1766    _mesa_update_framebuffer_visual(fb);
1767 }
1768
1769
1770 void GLAPIENTRY
1771 _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
1772                                              GLenum pname, GLint *params)
1773 {
1774    const struct gl_renderbuffer_attachment *att;
1775    struct gl_framebuffer *buffer;
1776    GET_CURRENT_CONTEXT(ctx);
1777
1778    ASSERT_OUTSIDE_BEGIN_END(ctx);
1779
1780    switch (target) {
1781 #if FEATURE_EXT_framebuffer_blit
1782    case GL_DRAW_FRAMEBUFFER_EXT:
1783       if (!ctx->Extensions.EXT_framebuffer_blit) {
1784          _mesa_error(ctx, GL_INVALID_ENUM,
1785                      "glGetFramebufferAttachmentParameterivEXT(target)");
1786          return;
1787       }
1788       buffer = ctx->DrawBuffer;
1789       break;
1790    case GL_READ_FRAMEBUFFER_EXT:
1791       if (!ctx->Extensions.EXT_framebuffer_blit) {
1792          _mesa_error(ctx, GL_INVALID_ENUM,
1793                      "glGetFramebufferAttachmentParameterivEXT(target)");
1794          return;
1795       }
1796       buffer = ctx->ReadBuffer;
1797       break;
1798 #endif
1799    case GL_FRAMEBUFFER_EXT:
1800       buffer = ctx->DrawBuffer;
1801       break;
1802    default:
1803       _mesa_error(ctx, GL_INVALID_ENUM,
1804                   "glGetFramebufferAttachmentParameterivEXT(target)");
1805       return;
1806    }
1807
1808    if (buffer->Name == 0) {
1809       _mesa_error(ctx, GL_INVALID_OPERATION,
1810                   "glGetFramebufferAttachmentParameterivEXT");
1811       return;
1812    }
1813
1814    att = _mesa_get_attachment(ctx, buffer, attachment);
1815    if (att == NULL) {
1816       _mesa_error(ctx, GL_INVALID_ENUM,
1817                   "glGetFramebufferAttachmentParameterivEXT(attachment)");
1818       return;
1819    }
1820
1821    if (attachment == GL_DEPTH_STENCIL_ATTACHMENT) {
1822       /* the depth and stencil attachments must point to the same buffer */
1823       const struct gl_renderbuffer_attachment *depthAtt, *stencilAtt;
1824       depthAtt = _mesa_get_attachment(ctx, buffer, GL_DEPTH_ATTACHMENT);
1825       stencilAtt = _mesa_get_attachment(ctx, buffer, GL_STENCIL_ATTACHMENT);
1826       if (depthAtt->Renderbuffer != stencilAtt->Renderbuffer) {
1827          _mesa_error(ctx, GL_INVALID_OPERATION,
1828                      "glGetFramebufferAttachmentParameterivEXT(DEPTH/STENCIL"
1829                      " attachments differ)");
1830          return;
1831       }
1832    }
1833
1834    /* No need to flush here */
1835
1836    switch (pname) {
1837    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT:
1838       *params = att->Type;
1839       return;
1840    case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT:
1841       if (att->Type == GL_RENDERBUFFER_EXT) {
1842          *params = att->Renderbuffer->Name;
1843       }
1844       else if (att->Type == GL_TEXTURE) {
1845          *params = att->Texture->Name;
1846       }
1847       else {
1848          _mesa_error(ctx, GL_INVALID_ENUM,
1849                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1850       }
1851       return;
1852    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT:
1853       if (att->Type == GL_TEXTURE) {
1854          *params = att->TextureLevel;
1855       }
1856       else {
1857          _mesa_error(ctx, GL_INVALID_ENUM,
1858                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1859       }
1860       return;
1861    case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT:
1862       if (att->Type == GL_TEXTURE) {
1863          if (att->Texture && att->Texture->Target == GL_TEXTURE_CUBE_MAP) {
1864             *params = GL_TEXTURE_CUBE_MAP_POSITIVE_X + att->CubeMapFace;
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_TEXTURE_3D_ZOFFSET_EXT:
1876       if (att->Type == GL_TEXTURE) {
1877          if (att->Texture && att->Texture->Target == GL_TEXTURE_3D) {
1878             *params = att->Zoffset;
1879          }
1880          else {
1881             *params = 0;
1882          }
1883       }
1884       else {
1885          _mesa_error(ctx, GL_INVALID_ENUM,
1886                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1887       }
1888       return;
1889    case GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING:
1890       if (!ctx->Extensions.ARB_framebuffer_object) {
1891          _mesa_error(ctx, GL_INVALID_ENUM,
1892                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1893       }
1894       else {
1895          *params = _mesa_get_format_color_encoding(att->Renderbuffer->Format);
1896       }
1897       return;
1898    case GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE:
1899       if (!ctx->Extensions.ARB_framebuffer_object) {
1900          _mesa_error(ctx, GL_INVALID_ENUM,
1901                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1902          return;
1903       }
1904       else {
1905          gl_format format = att->Renderbuffer->Format;
1906          if (format == MESA_FORMAT_CI8 || format == MESA_FORMAT_S8) {
1907             /* special cases */
1908             *params = GL_INDEX;
1909          }
1910          else {
1911             *params = _mesa_get_format_datatype(format);
1912          }
1913       }
1914       return;
1915    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1916    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1917    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1918    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1919    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1920    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1921       if (!ctx->Extensions.ARB_framebuffer_object) {
1922          _mesa_error(ctx, GL_INVALID_ENUM,
1923                      "glGetFramebufferAttachmentParameterivEXT(pname)");
1924       }
1925       else if (att->Texture) {
1926          const struct gl_texture_image *texImage =
1927             _mesa_select_tex_image(ctx, att->Texture, att->Texture->Target,
1928                                    att->TextureLevel);
1929          if (texImage) {
1930             *params = get_component_bits(pname, texImage->_BaseFormat,
1931                                          texImage->TexFormat);
1932          }
1933          else {
1934             *params = 0;
1935          }
1936       }
1937       else if (att->Renderbuffer) {
1938          *params = get_component_bits(pname, att->Renderbuffer->_BaseFormat,
1939                                       att->Renderbuffer->Format);
1940       }
1941       else {
1942          *params = 0;
1943       }
1944       return;
1945    default:
1946       _mesa_error(ctx, GL_INVALID_ENUM,
1947                   "glGetFramebufferAttachmentParameterivEXT(pname)");
1948       return;
1949    }
1950 }
1951
1952
1953 void GLAPIENTRY
1954 _mesa_GenerateMipmapEXT(GLenum target)
1955 {
1956    struct gl_texture_object *texObj;
1957    GET_CURRENT_CONTEXT(ctx);
1958
1959    ASSERT_OUTSIDE_BEGIN_END(ctx);
1960    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
1961
1962    switch (target) {
1963    case GL_TEXTURE_1D:
1964    case GL_TEXTURE_2D:
1965    case GL_TEXTURE_3D:
1966    case GL_TEXTURE_CUBE_MAP:
1967       /* OK, legal value */
1968       break;
1969    default:
1970       _mesa_error(ctx, GL_INVALID_ENUM, "glGenerateMipmapEXT(target)");
1971       return;
1972    }
1973
1974    texObj = _mesa_get_current_tex_object(ctx, target);
1975
1976    if (texObj->BaseLevel >= texObj->MaxLevel) {
1977       /* nothing to do */
1978       return;
1979    }
1980
1981    _mesa_lock_texture(ctx, texObj);
1982    if (target == GL_TEXTURE_CUBE_MAP) {
1983       GLuint face;
1984       for (face = 0; face < 6; face++)
1985          ctx->Driver.GenerateMipmap(ctx,
1986                                     GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB + face,
1987                                     texObj);
1988    }
1989    else {
1990       ctx->Driver.GenerateMipmap(ctx, target, texObj);
1991    }
1992    _mesa_unlock_texture(ctx, texObj);
1993 }
1994
1995
1996 #if FEATURE_EXT_framebuffer_blit
1997
1998 static const struct gl_renderbuffer_attachment *
1999 find_attachment(const struct gl_framebuffer *fb, const struct gl_renderbuffer *rb)
2000 {
2001    GLuint i;
2002    for (i = 0; i < Elements(fb->Attachment); i++) {
2003       if (fb->Attachment[i].Renderbuffer == rb)
2004          return &fb->Attachment[i];
2005    }
2006    return NULL;
2007 }
2008
2009
2010
2011 /**
2012  * Blit rectangular region, optionally from one framebuffer to another.
2013  *
2014  * Note, if the src buffer is multisampled and the dest is not, this is
2015  * when the samples must be resolved to a single color.
2016  */
2017 void GLAPIENTRY
2018 _mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
2019                          GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
2020                          GLbitfield mask, GLenum filter)
2021 {
2022    const GLbitfield legalMaskBits = (GL_COLOR_BUFFER_BIT |
2023                                      GL_DEPTH_BUFFER_BIT |
2024                                      GL_STENCIL_BUFFER_BIT);
2025    const struct gl_framebuffer *readFb, *drawFb;
2026    const struct gl_renderbuffer *colorReadRb, *colorDrawRb;
2027    GET_CURRENT_CONTEXT(ctx);
2028
2029    ASSERT_OUTSIDE_BEGIN_END(ctx);
2030    FLUSH_VERTICES(ctx, _NEW_BUFFERS);
2031
2032    if (ctx->NewState) {
2033       _mesa_update_state(ctx);
2034    }
2035
2036    readFb = ctx->ReadBuffer;
2037    drawFb = ctx->DrawBuffer;
2038
2039    if (!readFb || !drawFb) {
2040       /* This will normally never happen but someday we may want to
2041        * support MakeCurrent() with no drawables.
2042        */
2043       return;
2044    }
2045
2046    /* check for complete framebuffers */
2047    if (drawFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
2048        readFb->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
2049       _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
2050                   "glBlitFramebufferEXT(incomplete draw/read buffers)");
2051       return;
2052    }
2053
2054    if (filter != GL_NEAREST && filter != GL_LINEAR) {
2055       _mesa_error(ctx, GL_INVALID_ENUM, "glBlitFramebufferEXT(filter)");
2056       return;
2057    }
2058
2059    if (mask & ~legalMaskBits) {
2060       _mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
2061       return;
2062    }
2063
2064    /* depth/stencil must be blitted with nearest filtering */
2065    if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
2066         && filter != GL_NEAREST) {
2067       _mesa_error(ctx, GL_INVALID_OPERATION,
2068              "glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
2069       return;
2070    }
2071
2072    /* get color read/draw renderbuffers */
2073    if (mask & GL_COLOR_BUFFER_BIT) {
2074       colorReadRb = readFb->_ColorReadBuffer;
2075       colorDrawRb = drawFb->_ColorDrawBuffers[0];
2076    }
2077    else {
2078       colorReadRb = colorDrawRb = NULL;
2079    }
2080
2081    if (mask & GL_STENCIL_BUFFER_BIT) {
2082       struct gl_renderbuffer *readRb = readFb->_StencilBuffer;
2083       struct gl_renderbuffer *drawRb = drawFb->_StencilBuffer;
2084       if (!readRb ||
2085           !drawRb ||
2086           _mesa_get_format_bits(readRb->Format, GL_STENCIL_BITS) !=
2087           _mesa_get_format_bits(drawRb->Format, GL_STENCIL_BITS)) {
2088          _mesa_error(ctx, GL_INVALID_OPERATION,
2089                      "glBlitFramebufferEXT(stencil buffer size mismatch");
2090          return;
2091       }
2092    }
2093
2094    if (mask & GL_DEPTH_BUFFER_BIT) {
2095       struct gl_renderbuffer *readRb = readFb->_DepthBuffer;
2096       struct gl_renderbuffer *drawRb = drawFb->_DepthBuffer;
2097       if (!readRb ||
2098           !drawRb ||
2099           _mesa_get_format_bits(readRb->Format, GL_DEPTH_BITS) !=
2100           _mesa_get_format_bits(drawRb->Format, GL_DEPTH_BITS)) {
2101          _mesa_error(ctx, GL_INVALID_OPERATION,
2102                      "glBlitFramebufferEXT(depth buffer size mismatch");
2103          return;
2104       }
2105    }
2106
2107    if (readFb->Visual.samples > 0 &&
2108        drawFb->Visual.samples > 0 &&
2109        readFb->Visual.samples != drawFb->Visual.samples) {
2110       _mesa_error(ctx, GL_INVALID_OPERATION,
2111                   "glBlitFramebufferEXT(mismatched samples");
2112       return;
2113    }
2114
2115    /* extra checks for multisample copies... */
2116    if (readFb->Visual.samples > 0 || drawFb->Visual.samples > 0) {
2117       /* src and dest region sizes must be the same */
2118       if (srcX1 - srcX0 != dstX1 - dstX0 ||
2119           srcY1 - srcY0 != dstY1 - dstY0) {
2120          _mesa_error(ctx, GL_INVALID_OPERATION,
2121                 "glBlitFramebufferEXT(bad src/dst multisample region sizes");
2122          return;
2123       }
2124
2125       /* color formats must match */
2126       if (colorReadRb &&
2127           colorDrawRb &&
2128           colorReadRb->Format != colorDrawRb->Format) {
2129          _mesa_error(ctx, GL_INVALID_OPERATION,
2130                 "glBlitFramebufferEXT(bad src/dst multisample pixel formats");
2131          return;
2132       }
2133    }
2134
2135    if (!ctx->Extensions.EXT_framebuffer_blit) {
2136       _mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
2137       return;
2138    }
2139
2140    /* Debug code */
2141    if (DEBUG_BLIT) {
2142       _mesa_printf("glBlitFramebuffer(%d, %d, %d, %d,  %d, %d, %d, %d,"
2143                    " 0x%x, 0x%x)\n",
2144                    srcX0, srcY0, srcX1, srcY1,
2145                    dstX0, dstY0, dstX1, dstY1,
2146                    mask, filter);
2147       if (colorReadRb) {
2148          const struct gl_renderbuffer_attachment *att;
2149
2150          att = find_attachment(readFb, colorReadRb);
2151          _mesa_printf("  Src FBO %u  RB %u (%dx%d)  ",
2152                       readFb->Name, colorReadRb->Name,
2153                       colorReadRb->Width, colorReadRb->Height);
2154          if (att && att->Texture) {
2155             _mesa_printf("Tex %u  tgt 0x%x  level %u  face %u",
2156                          att->Texture->Name,
2157                          att->Texture->Target,
2158                          att->TextureLevel,
2159                          att->CubeMapFace);
2160          }
2161          _mesa_printf("\n");
2162
2163          att = find_attachment(drawFb, colorDrawRb);
2164          _mesa_printf("  Dst FBO %u  RB %u (%dx%d)  ",
2165                       drawFb->Name, colorDrawRb->Name,
2166                       colorDrawRb->Width, colorDrawRb->Height);
2167          if (att && att->Texture) {
2168             _mesa_printf("Tex %u  tgt 0x%x  level %u  face %u",
2169                          att->Texture->Name,
2170                          att->Texture->Target,
2171                          att->TextureLevel,
2172                          att->CubeMapFace);
2173          }
2174          _mesa_printf("\n");
2175       }
2176    }
2177
2178    ASSERT(ctx->Driver.BlitFramebuffer);
2179    ctx->Driver.BlitFramebuffer(ctx,
2180                                srcX0, srcY0, srcX1, srcY1,
2181                                dstX0, dstY0, dstX1, dstY1,
2182                                mask, filter);
2183 }
2184 #endif /* FEATURE_EXT_framebuffer_blit */