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