git.oblomov.eu Git - wine/blob - dlls/wined3d/context.c

   1 /*
   2  * Context and render target management in wined3d
   3  *
   4  * Copyright 2007-2008 Stefan Dösinger for CodeWeavers
   5  * Copyright 2009-2011 Henri Verbeet for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include <stdio.h>
  24 #ifdef HAVE_FLOAT_H
  25 # include <float.h>
  26 #endif
  27 #include "wined3d_private.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  30
  31 static DWORD wined3d_context_tls_idx;
  32
  33 /* FBO helper functions */
  34
  35 /* GL locking is done by the caller */
  36 void context_bind_fbo(struct wined3d_context *context, GLenum target, GLuint *fbo)
  37 {
  38     const struct wined3d_gl_info *gl_info = context->gl_info;
  39     GLuint f;
  40
  41     if (!fbo)
  42     {
  43         f = 0;
  44     }
  45     else
  46     {
  47         if (!*fbo)
  48         {
  49             gl_info->fbo_ops.glGenFramebuffers(1, fbo);
  50             checkGLcall("glGenFramebuffers()");
  51             TRACE("Created FBO %u.\n", *fbo);
  52         }
  53         f = *fbo;
  54     }
  55
  56     switch (target)
  57     {
  58         case GL_READ_FRAMEBUFFER:
  59             if (context->fbo_read_binding == f) return;
  60             context->fbo_read_binding = f;
  61             break;
  62
  63         case GL_DRAW_FRAMEBUFFER:
  64             if (context->fbo_draw_binding == f) return;
  65             context->fbo_draw_binding = f;
  66             break;
  67
  68         case GL_FRAMEBUFFER:
  69             if (context->fbo_read_binding == f
  70                     && context->fbo_draw_binding == f) return;
  71             context->fbo_read_binding = f;
  72             context->fbo_draw_binding = f;
  73             break;
  74
  75         default:
  76             FIXME("Unhandled target %#x.\n", target);
  77             break;
  78     }
  79
  80     gl_info->fbo_ops.glBindFramebuffer(target, f);
  81     checkGLcall("glBindFramebuffer()");
  82 }
  83
  84 /* GL locking is done by the caller */
  85 static void context_clean_fbo_attachments(const struct wined3d_gl_info *gl_info, GLenum target)
  86 {
  87     unsigned int i;
  88
  89     for (i = 0; i < gl_info->limits.buffers; ++i)
  90     {
  91         gl_info->fbo_ops.glFramebufferTexture2D(target, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, 0, 0);
  92         checkGLcall("glFramebufferTexture2D()");
  93     }
  94     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  95     checkGLcall("glFramebufferTexture2D()");
  96
  97     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  98     checkGLcall("glFramebufferTexture2D()");
  99 }
 100
 101 /* GL locking is done by the caller */
 102 static void context_destroy_fbo(struct wined3d_context *context, GLuint *fbo)
 103 {
 104     const struct wined3d_gl_info *gl_info = context->gl_info;
 105
 106     context_bind_fbo(context, GL_FRAMEBUFFER, fbo);
 107     context_clean_fbo_attachments(gl_info, GL_FRAMEBUFFER);
 108     context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
 109
 110     gl_info->fbo_ops.glDeleteFramebuffers(1, fbo);
 111     checkGLcall("glDeleteFramebuffers()");
 112 }
 113
 114 /* GL locking is done by the caller */
 115 void context_attach_depth_stencil_fbo(struct wined3d_context *context,
 116         GLenum fbo_target, struct wined3d_surface *depth_stencil, BOOL use_render_buffer)
 117 {
 118     const struct wined3d_gl_info *gl_info = context->gl_info;
 119
 120     TRACE("Attach depth stencil %p\n", depth_stencil);
 121
 122     if (depth_stencil)
 123     {
 124         DWORD format_flags = depth_stencil->resource.format->flags;
 125
 126         if (use_render_buffer && depth_stencil->current_renderbuffer)
 127         {
 128             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 129             {
 130                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_DEPTH_ATTACHMENT,
 131                         GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
 132                 checkGLcall("glFramebufferRenderbuffer()");
 133             }
 134
 135             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 136             {
 137                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_STENCIL_ATTACHMENT,
 138                         GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
 139                 checkGLcall("glFramebufferRenderbuffer()");
 140             }
 141         }
 142         else
 143         {
 144             surface_prepare_texture(depth_stencil, gl_info, FALSE);
 145
 146             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 147             {
 148                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT,
 149                         depth_stencil->texture_target, depth_stencil->texture_name,
 150                         depth_stencil->texture_level);
 151                 checkGLcall("glFramebufferTexture2D()");
 152             }
 153
 154             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 155             {
 156                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT,
 157                         depth_stencil->texture_target, depth_stencil->texture_name,
 158                         depth_stencil->texture_level);
 159                 checkGLcall("glFramebufferTexture2D()");
 160             }
 161         }
 162
 163         if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
 164         {
 165             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 166             checkGLcall("glFramebufferTexture2D()");
 167         }
 168
 169         if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
 170         {
 171             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 172             checkGLcall("glFramebufferTexture2D()");
 173         }
 174     }
 175     else
 176     {
 177         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 178         checkGLcall("glFramebufferTexture2D()");
 179
 180         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 181         checkGLcall("glFramebufferTexture2D()");
 182     }
 183 }
 184
 185 /* GL locking is done by the caller */
 186 static void context_attach_surface_fbo(const struct wined3d_context *context,
 187         GLenum fbo_target, DWORD idx, struct wined3d_surface *surface, DWORD location)
 188 {
 189     const struct wined3d_gl_info *gl_info = context->gl_info;
 190
 191     TRACE("Attach surface %p to %u\n", surface, idx);
 192
 193     if (surface && surface->resource.format->id != WINED3DFMT_NULL)
 194     {
 195         BOOL srgb;
 196
 197         switch (location)
 198         {
 199             case SFLAG_INTEXTURE:
 200             case SFLAG_INSRGBTEX:
 201                 srgb = location == SFLAG_INSRGBTEX;
 202                 surface_prepare_texture(surface, gl_info, srgb);
 203                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 204                         surface->texture_target, surface_get_texture_name(surface, gl_info, srgb),
 205                         surface->texture_level);
 206                 break;
 207
 208             default:
 209                 ERR("Unsupported location %s (%#x).\n", debug_surflocation(location), location);
 210                 break;
 211         }
 212         checkGLcall("glFramebufferTexture2D()");
 213     }
 214     else
 215     {
 216         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, GL_TEXTURE_2D, 0, 0);
 217         checkGLcall("glFramebufferTexture2D()");
 218     }
 219 }
 220
 221 /* GL locking is done by the caller */
 222 void context_check_fbo_status(struct wined3d_context *context, GLenum target)
 223 {
 224     const struct wined3d_gl_info *gl_info = context->gl_info;
 225     GLenum status;
 226
 227     if (!FIXME_ON(d3d)) return;
 228
 229     status = gl_info->fbo_ops.glCheckFramebufferStatus(target);
 230     if (status == GL_FRAMEBUFFER_COMPLETE)
 231     {
 232         TRACE("FBO complete\n");
 233     }
 234     else
 235     {
 236         struct wined3d_surface *attachment;
 237         unsigned int i;
 238
 239         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 240
 241         if (!context->current_fbo)
 242         {
 243             ERR("FBO 0 is incomplete, driver bug?\n");
 244             return;
 245         }
 246
 247         FIXME("\tLocation %s (%#x).\n", debug_surflocation(context->current_fbo->location),
 248                 context->current_fbo->location);
 249
 250         /* Dump the FBO attachments */
 251         for (i = 0; i < gl_info->limits.buffers; ++i)
 252         {
 253             attachment = context->current_fbo->render_targets[i];
 254             if (attachment)
 255             {
 256                 FIXME("\tColor attachment %d: (%p) %s %ux%u\n",
 257                         i, attachment, debug_d3dformat(attachment->resource.format->id),
 258                         attachment->pow2Width, attachment->pow2Height);
 259             }
 260         }
 261         attachment = context->current_fbo->depth_stencil;
 262         if (attachment)
 263         {
 264             FIXME("\tDepth attachment: (%p) %s %ux%u\n",
 265                     attachment, debug_d3dformat(attachment->resource.format->id),
 266                     attachment->pow2Width, attachment->pow2Height);
 267         }
 268     }
 269 }
 270
 271 static struct fbo_entry *context_create_fbo_entry(const struct wined3d_context *context,
 272         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 273 {
 274     const struct wined3d_gl_info *gl_info = context->gl_info;
 275     struct fbo_entry *entry;
 276
 277     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 278     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
 279     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 280     entry->depth_stencil = depth_stencil;
 281     entry->location = location;
 282     entry->attached = FALSE;
 283     entry->id = 0;
 284
 285     return entry;
 286 }
 287
 288 /* GL locking is done by the caller */
 289 static void context_reuse_fbo_entry(struct wined3d_context *context, GLenum target,
 290         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 291         DWORD location, struct fbo_entry *entry)
 292 {
 293     const struct wined3d_gl_info *gl_info = context->gl_info;
 294
 295     context_bind_fbo(context, target, &entry->id);
 296     context_clean_fbo_attachments(gl_info, target);
 297
 298     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 299     entry->depth_stencil = depth_stencil;
 300     entry->location = location;
 301     entry->attached = FALSE;
 302 }
 303
 304 /* GL locking is done by the caller */
 305 static void context_destroy_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 306 {
 307     if (entry->id)
 308     {
 309         TRACE("Destroy FBO %d\n", entry->id);
 310         context_destroy_fbo(context, &entry->id);
 311     }
 312     --context->fbo_entry_count;
 313     list_remove(&entry->entry);
 314     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 315     HeapFree(GetProcessHeap(), 0, entry);
 316 }
 317
 318
 319 /* GL locking is done by the caller */
 320 static struct fbo_entry *context_find_fbo_entry(struct wined3d_context *context, GLenum target,
 321         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 322 {
 323     const struct wined3d_gl_info *gl_info = context->gl_info;
 324     struct fbo_entry *entry;
 325
 326     if (depth_stencil && render_targets && render_targets[0])
 327     {
 328         if (depth_stencil->resource.width < render_targets[0]->resource.width ||
 329             depth_stencil->resource.height < render_targets[0]->resource.height)
 330         {
 331             WARN("Depth stencil is smaller than the primary color buffer, disabling\n");
 332             depth_stencil = NULL;
 333         }
 334     }
 335
 336     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 337     {
 338         if (!memcmp(entry->render_targets,
 339                 render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
 340                 && entry->depth_stencil == depth_stencil && entry->location == location)
 341         {
 342             list_remove(&entry->entry);
 343             list_add_head(&context->fbo_list, &entry->entry);
 344             return entry;
 345         }
 346     }
 347
 348     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 349     {
 350         entry = context_create_fbo_entry(context, render_targets, depth_stencil, location);
 351         list_add_head(&context->fbo_list, &entry->entry);
 352         ++context->fbo_entry_count;
 353     }
 354     else
 355     {
 356         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 357         context_reuse_fbo_entry(context, target, render_targets, depth_stencil, location, entry);
 358         list_remove(&entry->entry);
 359         list_add_head(&context->fbo_list, &entry->entry);
 360     }
 361
 362     return entry;
 363 }
 364
 365 /* GL locking is done by the caller */
 366 static void context_apply_fbo_entry(struct wined3d_context *context, GLenum target, struct fbo_entry *entry)
 367 {
 368     const struct wined3d_gl_info *gl_info = context->gl_info;
 369     unsigned int i;
 370
 371     context_bind_fbo(context, target, &entry->id);
 372
 373     if (entry->attached) return;
 374
 375     /* Apply render targets */
 376     for (i = 0; i < gl_info->limits.buffers; ++i)
 377     {
 378         context_attach_surface_fbo(context, target, i, entry->render_targets[i], entry->location);
 379     }
 380
 381     /* Apply depth targets */
 382     if (entry->depth_stencil)
 383         surface_set_compatible_renderbuffer(entry->depth_stencil, entry->render_targets[0]);
 384     context_attach_depth_stencil_fbo(context, target, entry->depth_stencil, TRUE);
 385
 386     entry->attached = TRUE;
 387 }
 388
 389 /* GL locking is done by the caller */
 390 static void context_apply_fbo_state(struct wined3d_context *context, GLenum target,
 391         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 392 {
 393     struct fbo_entry *entry, *entry2;
 394
 395     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 396     {
 397         context_destroy_fbo_entry(context, entry);
 398     }
 399
 400     if (context->rebind_fbo)
 401     {
 402         context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
 403         context->rebind_fbo = FALSE;
 404     }
 405
 406     if (render_targets)
 407     {
 408         context->current_fbo = context_find_fbo_entry(context, target, render_targets, depth_stencil, location);
 409         context_apply_fbo_entry(context, target, context->current_fbo);
 410     }
 411     else
 412     {
 413         context->current_fbo = NULL;
 414         context_bind_fbo(context, target, NULL);
 415     }
 416 }
 417
 418 /* GL locking is done by the caller */
 419 void context_apply_fbo_state_blit(struct wined3d_context *context, GLenum target,
 420         struct wined3d_surface *render_target, struct wined3d_surface *depth_stencil, DWORD location)
 421 {
 422     if (location != SFLAG_INDRAWABLE || surface_is_offscreen(render_target))
 423     {
 424         UINT clear_size = (context->gl_info->limits.buffers - 1) * sizeof(*context->blit_targets);
 425         context->blit_targets[0] = render_target;
 426         if (clear_size) memset(&context->blit_targets[1], 0, clear_size);
 427         context_apply_fbo_state(context, target, context->blit_targets, depth_stencil, location);
 428     }
 429     else
 430     {
 431         context_apply_fbo_state(context, target, NULL, NULL, location);
 432     }
 433 }
 434
 435 /* Context activation is done by the caller. */
 436 void context_alloc_occlusion_query(struct wined3d_context *context, struct wined3d_occlusion_query *query)
 437 {
 438     const struct wined3d_gl_info *gl_info = context->gl_info;
 439
 440     if (context->free_occlusion_query_count)
 441     {
 442         query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
 443     }
 444     else
 445     {
 446         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 447         {
 448             ENTER_GL();
 449             GL_EXTCALL(glGenQueriesARB(1, &query->id));
 450             checkGLcall("glGenQueriesARB");
 451             LEAVE_GL();
 452
 453             TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
 454         }
 455         else
 456         {
 457             WARN("Occlusion queries not supported, not allocating query id.\n");
 458             query->id = 0;
 459         }
 460     }
 461
 462     query->context = context;
 463     list_add_head(&context->occlusion_queries, &query->entry);
 464 }
 465
 466 void context_free_occlusion_query(struct wined3d_occlusion_query *query)
 467 {
 468     struct wined3d_context *context = query->context;
 469
 470     list_remove(&query->entry);
 471     query->context = NULL;
 472
 473     if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
 474     {
 475         UINT new_size = context->free_occlusion_query_size << 1;
 476         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
 477                 new_size * sizeof(*context->free_occlusion_queries));
 478
 479         if (!new_data)
 480         {
 481             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 482             return;
 483         }
 484
 485         context->free_occlusion_query_size = new_size;
 486         context->free_occlusion_queries = new_data;
 487     }
 488
 489     context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
 490 }
 491
 492 /* Context activation is done by the caller. */
 493 void context_alloc_event_query(struct wined3d_context *context, struct wined3d_event_query *query)
 494 {
 495     const struct wined3d_gl_info *gl_info = context->gl_info;
 496
 497     if (context->free_event_query_count)
 498     {
 499         query->object = context->free_event_queries[--context->free_event_query_count];
 500     }
 501     else
 502     {
 503         if (gl_info->supported[ARB_SYNC])
 504         {
 505             /* Using ARB_sync, not much to do here. */
 506             query->object.sync = NULL;
 507             TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
 508         }
 509         else if (gl_info->supported[APPLE_FENCE])
 510         {
 511             ENTER_GL();
 512             GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
 513             checkGLcall("glGenFencesAPPLE");
 514             LEAVE_GL();
 515
 516             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 517         }
 518         else if(gl_info->supported[NV_FENCE])
 519         {
 520             ENTER_GL();
 521             GL_EXTCALL(glGenFencesNV(1, &query->object.id));
 522             checkGLcall("glGenFencesNV");
 523             LEAVE_GL();
 524
 525             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 526         }
 527         else
 528         {
 529             WARN("Event queries not supported, not allocating query id.\n");
 530             query->object.id = 0;
 531         }
 532     }
 533
 534     query->context = context;
 535     list_add_head(&context->event_queries, &query->entry);
 536 }
 537
 538 void context_free_event_query(struct wined3d_event_query *query)
 539 {
 540     struct wined3d_context *context = query->context;
 541
 542     list_remove(&query->entry);
 543     query->context = NULL;
 544
 545     if (context->free_event_query_count >= context->free_event_query_size - 1)
 546     {
 547         UINT new_size = context->free_event_query_size << 1;
 548         union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
 549                 new_size * sizeof(*context->free_event_queries));
 550
 551         if (!new_data)
 552         {
 553             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
 554             return;
 555         }
 556
 557         context->free_event_query_size = new_size;
 558         context->free_event_queries = new_data;
 559     }
 560
 561     context->free_event_queries[context->free_event_query_count++] = query->object;
 562 }
 563
 564 typedef void (context_fbo_entry_func_t)(struct wined3d_context *context, struct fbo_entry *entry);
 565
 566 static void context_enum_surface_fbo_entries(struct wined3d_device *device,
 567         struct wined3d_surface *surface, context_fbo_entry_func_t *callback)
 568 {
 569     UINT i;
 570
 571     for (i = 0; i < device->context_count; ++i)
 572     {
 573         struct wined3d_context *context = device->contexts[i];
 574         const struct wined3d_gl_info *gl_info = context->gl_info;
 575         struct fbo_entry *entry, *entry2;
 576
 577         if (context->current_rt == surface) context->current_rt = NULL;
 578
 579         LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 580         {
 581             UINT j;
 582
 583             if (entry->depth_stencil == surface)
 584             {
 585                 callback(context, entry);
 586                 continue;
 587             }
 588
 589             for (j = 0; j < gl_info->limits.buffers; ++j)
 590             {
 591                 if (entry->render_targets[j] == surface)
 592                 {
 593                     callback(context, entry);
 594                     break;
 595                 }
 596             }
 597         }
 598     }
 599 }
 600
 601 static void context_queue_fbo_entry_destruction(struct wined3d_context *context, struct fbo_entry *entry)
 602 {
 603     list_remove(&entry->entry);
 604     list_add_head(&context->fbo_destroy_list, &entry->entry);
 605 }
 606
 607 void context_resource_released(struct wined3d_device *device,
 608         struct wined3d_resource *resource, WINED3DRESOURCETYPE type)
 609 {
 610     if (!device->d3d_initialized) return;
 611
 612     switch (type)
 613     {
 614         case WINED3DRTYPE_SURFACE:
 615             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 616                     context_queue_fbo_entry_destruction);
 617             break;
 618
 619         default:
 620             break;
 621     }
 622 }
 623
 624 static void context_detach_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 625 {
 626     entry->attached = FALSE;
 627 }
 628
 629 void context_resource_unloaded(struct wined3d_device *device,
 630         struct wined3d_resource *resource, WINED3DRESOURCETYPE type)
 631 {
 632     switch (type)
 633     {
 634         case WINED3DRTYPE_SURFACE:
 635             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 636                     context_detach_fbo_entry);
 637             break;
 638
 639         default:
 640             break;
 641     }
 642 }
 643
 644 void context_surface_update(struct wined3d_context *context, struct wined3d_surface *surface)
 645 {
 646     const struct wined3d_gl_info *gl_info = context->gl_info;
 647     struct fbo_entry *entry = context->current_fbo;
 648     unsigned int i;
 649
 650     if (!entry || context->rebind_fbo) return;
 651
 652     for (i = 0; i < gl_info->limits.buffers; ++i)
 653     {
 654         if (surface == entry->render_targets[i])
 655         {
 656             TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
 657             context->rebind_fbo = TRUE;
 658             return;
 659         }
 660     }
 661
 662     if (surface == entry->depth_stencil)
 663     {
 664         TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
 665         context->rebind_fbo = TRUE;
 666     }
 667 }
 668
 669 static BOOL context_set_pixel_format(const struct wined3d_gl_info *gl_info, HDC dc, int format)
 670 {
 671     int current = GetPixelFormat(dc);
 672
 673     if (current == format) return TRUE;
 674
 675     if (!current)
 676     {
 677         if (!SetPixelFormat(dc, format, NULL))
 678         {
 679             ERR("Failed to set pixel format %d on device context %p, last error %#x.\n",
 680                     format, dc, GetLastError());
 681             return FALSE;
 682         }
 683         return TRUE;
 684     }
 685
 686     /* By default WGL doesn't allow pixel format adjustments but we need it
 687      * here. For this reason there's a Wine specific wglSetPixelFormat()
 688      * which allows us to set the pixel format multiple times. Only use it
 689      * when really needed. */
 690     if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 691     {
 692         if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format, NULL)))
 693         {
 694             ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
 695                     format, dc);
 696             return FALSE;
 697         }
 698         return TRUE;
 699     }
 700
 701     /* OpenGL doesn't allow pixel format adjustments. Print an error and
 702      * continue using the old format. There's a big chance that the old
 703      * format works although with a performance hit and perhaps rendering
 704      * errors. */
 705     ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
 706             format, dc, current);
 707     return TRUE;
 708 }
 709
 710 static BOOL context_set_gl_context(struct wined3d_context *ctx)
 711 {
 712     struct wined3d_swapchain *swapchain = ctx->swapchain;
 713
 714     if (!pwglMakeCurrent(ctx->hdc, ctx->glCtx))
 715     {
 716         WARN("Failed to make GL context %p current on device context %p, last error %#x.\n",
 717                 ctx->glCtx, ctx->hdc, GetLastError());
 718         ctx->valid = 0;
 719         WARN("Trying fallback to the backup window.\n");
 720
 721         if (!swapchain->backup_dc)
 722         {
 723             TRACE("Creating the backup window for swapchain %p.\n", swapchain);
 724             swapchain->backup_wnd = CreateWindowA(WINED3D_OPENGL_WINDOW_CLASS_NAME, "WineD3D fake window",
 725                     WS_OVERLAPPEDWINDOW, 10, 10, 10, 10, NULL, NULL, NULL, NULL);
 726             if (!swapchain->backup_wnd)
 727             {
 728                 ERR("Failed to create a window.\n");
 729                 goto fail;
 730             }
 731             swapchain->backup_dc = GetDC(swapchain->backup_wnd);
 732             if (!swapchain->backup_dc)
 733             {
 734                 ERR("Failed to get a DC.\n");
 735                 goto fail;
 736             }
 737             if (!context_set_pixel_format(ctx->gl_info, swapchain->backup_dc, ctx->pixel_format))
 738             {
 739                 ERR("Failed to set pixel format %d on device context %p.\n",
 740                         ctx->pixel_format, swapchain->backup_dc);
 741                 goto fail;
 742             }
 743         }
 744
 745         if (!pwglMakeCurrent(swapchain->backup_dc, ctx->glCtx))
 746         {
 747             ERR("Fallback to backup window (dc %p) failed too, last error %#x.\n",
 748                     swapchain->backup_dc, GetLastError());
 749             context_set_current(NULL);
 750             return FALSE;
 751         }
 752     }
 753     return TRUE;
 754
 755 fail:
 756     if (swapchain->backup_dc)
 757     {
 758         ReleaseDC(swapchain->backup_wnd, swapchain->backup_dc);
 759         swapchain->backup_dc = NULL;
 760     }
 761     if (swapchain->backup_wnd)
 762     {
 763         DestroyWindow(swapchain->backup_wnd);
 764         swapchain->backup_wnd = NULL;
 765     }
 766     context_set_current(NULL);
 767     return FALSE;
 768 }
 769
 770 static void context_restore_gl_context(HDC dc, HGLRC gl_ctx)
 771 {
 772     if (!pwglMakeCurrent(dc, gl_ctx))
 773     {
 774         ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 775                 gl_ctx, dc, GetLastError());
 776         context_set_current(NULL);
 777     }
 778 }
 779
 780 static void context_update_window(struct wined3d_context *context)
 781 {
 782     if (context->win_handle == context->swapchain->win_handle)
 783         return;
 784
 785     TRACE("Updating context %p window from %p to %p.\n",
 786             context, context->win_handle, context->swapchain->win_handle);
 787
 788     if (context->valid)
 789     {
 790         /* You'd figure ReleaseDC() would fail if the DC doesn't match the
 791          * window. However, that's not what actually happens, and there are
 792          * user32 tests that confirm ReleaseDC() with the wrong window is
 793          * supposed to succeed. So explicitly check that the DC belongs to
 794          * the window, since we want to avoid releasing a DC that belongs to
 795          * some other window if the original window was already destroyed. */
 796         if (WindowFromDC(context->hdc) != context->win_handle)
 797         {
 798             WARN("DC %p does not belong to window %p.\n",
 799                     context->hdc, context->win_handle);
 800         }
 801         else if (!ReleaseDC(context->win_handle, context->hdc))
 802         {
 803             ERR("Failed to release device context %p, last error %#x.\n",
 804                     context->hdc, GetLastError());
 805         }
 806     }
 807     else context->valid = 1;
 808
 809     context->win_handle = context->swapchain->win_handle;
 810
 811     if (!(context->hdc = GetDC(context->win_handle)))
 812     {
 813         ERR("Failed to get a device context for window %p.\n", context->win_handle);
 814         goto err;
 815     }
 816
 817     if (!context_set_pixel_format(context->gl_info, context->hdc, context->pixel_format))
 818     {
 819         ERR("Failed to set pixel format %d on device context %p.\n",
 820                 context->pixel_format, context->hdc);
 821         goto err;
 822     }
 823
 824     context_set_gl_context(context);
 825
 826     return;
 827
 828 err:
 829     context->valid = 0;
 830 }
 831
 832 /* Do not call while under the GL lock. */
 833 static void context_destroy_gl_resources(struct wined3d_context *context)
 834 {
 835     const struct wined3d_gl_info *gl_info = context->gl_info;
 836     struct wined3d_occlusion_query *occlusion_query;
 837     struct wined3d_event_query *event_query;
 838     struct fbo_entry *entry, *entry2;
 839     HGLRC restore_ctx;
 840     HDC restore_dc;
 841     unsigned int i;
 842
 843     restore_ctx = pwglGetCurrentContext();
 844     restore_dc = pwglGetCurrentDC();
 845
 846     context_update_window(context);
 847     if (context->valid && restore_ctx != context->glCtx)
 848         context_set_gl_context(context);
 849     else restore_ctx = NULL;
 850
 851     ENTER_GL();
 852
 853     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
 854     {
 855         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
 856             GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
 857         occlusion_query->context = NULL;
 858     }
 859
 860     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
 861     {
 862         if (context->valid)
 863         {
 864             if (gl_info->supported[ARB_SYNC])
 865             {
 866                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 867             }
 868             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
 869             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
 870         }
 871         event_query->context = NULL;
 872     }
 873
 874     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 875     {
 876         if (!context->valid) entry->id = 0;
 877         context_destroy_fbo_entry(context, entry);
 878     }
 879
 880     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 881     {
 882         if (!context->valid) entry->id = 0;
 883         context_destroy_fbo_entry(context, entry);
 884     }
 885
 886     if (context->valid)
 887     {
 888         if (context->dst_fbo)
 889         {
 890             TRACE("Destroy dst FBO %d\n", context->dst_fbo);
 891             context_destroy_fbo(context, &context->dst_fbo);
 892         }
 893         if (context->dummy_arbfp_prog)
 894         {
 895             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
 896         }
 897
 898         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 899             GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
 900
 901         if (gl_info->supported[ARB_SYNC])
 902         {
 903             for (i = 0; i < context->free_event_query_count; ++i)
 904             {
 905                 GL_EXTCALL(glDeleteSync(context->free_event_queries[i].sync));
 906             }
 907         }
 908         else if (gl_info->supported[APPLE_FENCE])
 909         {
 910             for (i = 0; i < context->free_event_query_count; ++i)
 911             {
 912                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
 913             }
 914         }
 915         else if (gl_info->supported[NV_FENCE])
 916         {
 917             for (i = 0; i < context->free_event_query_count; ++i)
 918             {
 919                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
 920             }
 921         }
 922
 923         checkGLcall("context cleanup");
 924     }
 925
 926     LEAVE_GL();
 927
 928     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
 929     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
 930
 931     if (restore_ctx)
 932     {
 933         context_restore_gl_context(restore_dc, restore_ctx);
 934     }
 935     else if (pwglGetCurrentContext() && !pwglMakeCurrent(NULL, NULL))
 936     {
 937         ERR("Failed to disable GL context.\n");
 938     }
 939
 940     ReleaseDC(context->win_handle, context->hdc);
 941
 942     if (!pwglDeleteContext(context->glCtx))
 943     {
 944         DWORD err = GetLastError();
 945         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
 946     }
 947 }
 948
 949 DWORD context_get_tls_idx(void)
 950 {
 951     return wined3d_context_tls_idx;
 952 }
 953
 954 void context_set_tls_idx(DWORD idx)
 955 {
 956     wined3d_context_tls_idx = idx;
 957 }
 958
 959 struct wined3d_context *context_get_current(void)
 960 {
 961     return TlsGetValue(wined3d_context_tls_idx);
 962 }
 963
 964 /* Do not call while under the GL lock. */
 965 BOOL context_set_current(struct wined3d_context *ctx)
 966 {
 967     struct wined3d_context *old = context_get_current();
 968
 969     if (old == ctx)
 970     {
 971         TRACE("Already using D3D context %p.\n", ctx);
 972         return TRUE;
 973     }
 974
 975     if (old)
 976     {
 977         if (old->destroyed)
 978         {
 979             TRACE("Switching away from destroyed context %p.\n", old);
 980             context_destroy_gl_resources(old);
 981             HeapFree(GetProcessHeap(), 0, old);
 982         }
 983         else
 984         {
 985             old->current = 0;
 986         }
 987     }
 988
 989     if (ctx)
 990     {
 991         if (!ctx->valid)
 992         {
 993             ERR("Trying to make invalid context %p current\n", ctx);
 994             return FALSE;
 995         }
 996
 997         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
 998         if (!context_set_gl_context(ctx))
 999             return FALSE;
1000         ctx->current = 1;
1001     }
1002     else if(pwglGetCurrentContext())
1003     {
1004         TRACE("Clearing current D3D context.\n");
1005         if (!pwglMakeCurrent(NULL, NULL))
1006         {
1007             DWORD err = GetLastError();
1008             ERR("Failed to clear current GL context, last error %#x.\n", err);
1009             TlsSetValue(wined3d_context_tls_idx, NULL);
1010             return FALSE;
1011         }
1012     }
1013
1014     return TlsSetValue(wined3d_context_tls_idx, ctx);
1015 }
1016
1017 void context_release(struct wined3d_context *context)
1018 {
1019     TRACE("Releasing context %p, level %u.\n", context, context->level);
1020
1021     if (WARN_ON(d3d))
1022     {
1023         if (!context->level)
1024             WARN("Context %p is not active.\n", context);
1025         else if (context != context_get_current())
1026             WARN("Context %p is not the current context.\n", context);
1027     }
1028
1029     if (!--context->level && context->restore_ctx)
1030     {
1031         TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1032         context_restore_gl_context(context->restore_dc, context->restore_ctx);
1033         context->restore_ctx = NULL;
1034         context->restore_dc = NULL;
1035     }
1036 }
1037
1038 static void context_enter(struct wined3d_context *context)
1039 {
1040     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1041
1042     if (!context->level++)
1043     {
1044         const struct wined3d_context *current_context = context_get_current();
1045         HGLRC current_gl = pwglGetCurrentContext();
1046
1047         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1048         {
1049             TRACE("Another GL context (%p on device context %p) is already current.\n",
1050                     current_gl, pwglGetCurrentDC());
1051             context->restore_ctx = current_gl;
1052             context->restore_dc = pwglGetCurrentDC();
1053         }
1054     }
1055 }
1056
1057 static void context_invalidate_state(struct wined3d_context *context,
1058         DWORD state, const struct StateEntry *state_table)
1059 {
1060     DWORD rep = state_table[state].representative;
1061     DWORD idx;
1062     BYTE shift;
1063
1064     if (isStateDirty(context, rep)) return;
1065
1066     context->dirtyArray[context->numDirtyEntries++] = rep;
1067     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1068     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1069     context->isStateDirty[idx] |= (1 << shift);
1070 }
1071
1072 /* This function takes care of WineD3D pixel format selection. */
1073 static int WineD3D_ChoosePixelFormat(struct wined3d_device *device, HDC hdc,
1074         const struct wined3d_format *color_format, const struct wined3d_format *ds_format,
1075         BOOL auxBuffers, int numSamples, BOOL findCompatible)
1076 {
1077     int iPixelFormat=0;
1078     unsigned int matchtry;
1079     BYTE redBits, greenBits, blueBits, alphaBits, colorBits;
1080     BYTE depthBits=0, stencilBits=0;
1081
1082     static const struct
1083     {
1084         BOOL require_aux;
1085         BOOL exact_alpha;
1086         BOOL exact_color;
1087     }
1088     matches[] =
1089     {
1090         /* First, try without alpha match buffers. MacOS supports aux buffers only
1091          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
1092          * Then try without aux buffers - this is the most common cause for not
1093          * finding a pixel format. Also some drivers(the open source ones)
1094          * only offer 32 bit ARB pixel formats. First try without an exact alpha
1095          * match, then try without an exact alpha and color match.
1096          */
1097         { TRUE,  TRUE,  TRUE  },
1098         { TRUE,  FALSE, TRUE  },
1099         { FALSE, TRUE,  TRUE  },
1100         { FALSE, FALSE, TRUE  },
1101         { TRUE,  FALSE, FALSE },
1102         { FALSE, FALSE, FALSE },
1103     };
1104
1105     int i = 0;
1106     int nCfgs = device->adapter->nCfgs;
1107
1108     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, findCompatible=%d\n",
1109           debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id),
1110           auxBuffers, numSamples, findCompatible);
1111
1112     if (!getColorBits(color_format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1113     {
1114         ERR("Unable to get color bits for format %s (%#x)!\n",
1115                 debug_d3dformat(color_format->id), color_format->id);
1116         return 0;
1117     }
1118
1119     getDepthStencilBits(ds_format, &depthBits, &stencilBits);
1120
1121     for (matchtry = 0; matchtry < (sizeof(matches) / sizeof(*matches)) && !iPixelFormat; ++matchtry)
1122     {
1123         for (i = 0; i < nCfgs; ++i)
1124         {
1125             const struct wined3d_pixel_format *cfg = &device->adapter->cfgs[i];
1126             BOOL exactDepthMatch = TRUE;
1127
1128             /* For now only accept RGBA formats. Perhaps some day we will
1129              * allow floating point formats for pbuffers. */
1130             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1131                 continue;
1132
1133             /* In window mode we need a window drawable format and double buffering. */
1134             if(!(cfg->windowDrawable && cfg->doubleBuffer))
1135                 continue;
1136
1137             /* We like to have aux buffers in backbuffer mode */
1138             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
1139                 continue;
1140
1141             if(matches[matchtry].exact_color) {
1142                 if(cfg->redSize != redBits)
1143                     continue;
1144                 if(cfg->greenSize != greenBits)
1145                     continue;
1146                 if(cfg->blueSize != blueBits)
1147                     continue;
1148             } else {
1149                 if(cfg->redSize < redBits)
1150                     continue;
1151                 if(cfg->greenSize < greenBits)
1152                     continue;
1153                 if(cfg->blueSize < blueBits)
1154                     continue;
1155             }
1156             if(matches[matchtry].exact_alpha) {
1157                 if(cfg->alphaSize != alphaBits)
1158                     continue;
1159             } else {
1160                 if(cfg->alphaSize < alphaBits)
1161                     continue;
1162             }
1163
1164             /* We try to locate a format which matches our requirements exactly. In case of
1165              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1166             if(cfg->depthSize < depthBits)
1167                 continue;
1168             else if(cfg->depthSize > depthBits)
1169                 exactDepthMatch = FALSE;
1170
1171             /* In all cases make sure the number of stencil bits matches our requirements
1172              * even when we don't need stencil because it could affect performance EXCEPT
1173              * on cards which don't offer depth formats without stencil like the i915 drivers
1174              * on Linux. */
1175             if (stencilBits != cfg->stencilSize
1176                     && !(device->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
1177                 continue;
1178
1179             /* Check multisampling support */
1180             if(cfg->numSamples != numSamples)
1181                 continue;
1182
1183             /* When we have passed all the checks then we have found a format which matches our
1184              * requirements. Note that we only check for a limit number of capabilities right now,
1185              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
1186              * can still differ in things like multisampling, stereo, SRGB and other flags.
1187              */
1188
1189             /* Exit the loop as we have found a format :) */
1190             if(exactDepthMatch) {
1191                 iPixelFormat = cfg->iPixelFormat;
1192                 break;
1193             } else if(!iPixelFormat) {
1194                 /* In the end we might end up with a format which doesn't exactly match our depth
1195                  * requirements. Accept the first format we found because formats with higher iPixelFormat
1196                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
1197                 iPixelFormat = cfg->iPixelFormat;
1198             }
1199         }
1200     }
1201
1202     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1203     if(!iPixelFormat && !findCompatible) {
1204         ERR("Can't find a suitable iPixelFormat\n");
1205         return FALSE;
1206     } else if(!iPixelFormat) {
1207         PIXELFORMATDESCRIPTOR pfd;
1208
1209         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1210         /* PixelFormat selection */
1211         ZeroMemory(&pfd, sizeof(pfd));
1212         pfd.nSize      = sizeof(pfd);
1213         pfd.nVersion   = 1;
1214         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1215         pfd.iPixelType = PFD_TYPE_RGBA;
1216         pfd.cAlphaBits = alphaBits;
1217         pfd.cColorBits = colorBits;
1218         pfd.cDepthBits = depthBits;
1219         pfd.cStencilBits = stencilBits;
1220         pfd.iLayerType = PFD_MAIN_PLANE;
1221
1222         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1223         if(!iPixelFormat) {
1224             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1225             ERR("Can't find a suitable iPixelFormat\n");
1226             return FALSE;
1227         }
1228     }
1229
1230     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1231             iPixelFormat, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id));
1232     return iPixelFormat;
1233 }
1234
1235 static inline DWORD generate_rt_mask(GLenum buffer)
1236 {
1237     /* Should take care of all the GL_FRONT/GL_BACK/GL_AUXi/GL_NONE... cases */
1238     return buffer ? (1 << 31) | buffer : 0;
1239 }
1240
1241 static inline DWORD generate_rt_mask_from_surface(const struct wined3d_surface *target)
1242 {
1243     return (1 << 31) | surface_get_gl_buffer(target);
1244 }
1245
1246 /* Do not call while under the GL lock. */
1247 struct wined3d_context *context_create(struct wined3d_swapchain *swapchain,
1248         struct wined3d_surface *target, const struct wined3d_format *ds_format)
1249 {
1250     struct wined3d_device *device = swapchain->device;
1251     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1252     const struct wined3d_format *color_format;
1253     struct wined3d_context *ret;
1254     PIXELFORMATDESCRIPTOR pfd;
1255     BOOL auxBuffers = FALSE;
1256     int numSamples = 0;
1257     int pixel_format;
1258     unsigned int s;
1259     int swap_interval;
1260     DWORD state;
1261     HGLRC ctx;
1262     HDC hdc;
1263
1264     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1265
1266     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1267     if (!ret)
1268     {
1269         ERR("Failed to allocate context memory.\n");
1270         return NULL;
1271     }
1272
1273     if (!(hdc = GetDC(swapchain->win_handle)))
1274     {
1275         ERR("Failed to retrieve a device context.\n");
1276         goto out;
1277     }
1278
1279     color_format = target->resource.format;
1280
1281     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1282      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1283     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1284     {
1285         auxBuffers = TRUE;
1286
1287         if (color_format->id == WINED3DFMT_B4G4R4X4_UNORM)
1288             color_format = wined3d_get_format(gl_info, WINED3DFMT_B4G4R4A4_UNORM);
1289         else if (color_format->id == WINED3DFMT_B8G8R8X8_UNORM)
1290             color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1291     }
1292
1293     /* DirectDraw supports 8bit paletted render targets and these are used by
1294      * old games like StarCraft and C&C. Most modern hardware doesn't support
1295      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1296      * conversion (ab)uses the alpha component for storing the palette index.
1297      * For this reason we require a format with 8bit alpha, so request
1298      * A8R8G8B8. */
1299     if (color_format->id == WINED3DFMT_P8_UINT)
1300         color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1301
1302     /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD. */
1303     if (swapchain->presentParms.MultiSampleType && (swapchain->presentParms.SwapEffect == WINED3DSWAPEFFECT_DISCARD))
1304     {
1305         if (!gl_info->supported[ARB_MULTISAMPLE])
1306             WARN("The application is requesting multisampling without support.\n");
1307         else
1308         {
1309             TRACE("Requesting multisample type %#x.\n", swapchain->presentParms.MultiSampleType);
1310             numSamples = swapchain->presentParms.MultiSampleType;
1311         }
1312     }
1313
1314     /* Try to find a pixel format which matches our requirements. */
1315     pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format, ds_format,
1316             auxBuffers, numSamples, FALSE /* findCompatible */);
1317
1318     /* Try to locate a compatible format if we weren't able to find anything. */
1319     if (!pixel_format)
1320     {
1321         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1322         pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format, ds_format,
1323                 auxBuffers, 0 /* numSamples */, TRUE /* findCompatible */);
1324     }
1325
1326     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1327     if (!pixel_format)
1328     {
1329         ERR("Can't find a suitable pixel format.\n");
1330         goto out;
1331     }
1332
1333     DescribePixelFormat(hdc, pixel_format, sizeof(pfd), &pfd);
1334     if (!context_set_pixel_format(gl_info, hdc, pixel_format))
1335     {
1336         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1337         goto out;
1338     }
1339
1340     ctx = pwglCreateContext(hdc);
1341     if (device->context_count)
1342     {
1343         if (!pwglShareLists(device->contexts[0]->glCtx, ctx))
1344         {
1345             DWORD err = GetLastError();
1346             ERR("wglShareLists(%p, %p) failed, last error %#x.\n",
1347                     device->contexts[0]->glCtx, ctx, err);
1348         }
1349     }
1350
1351     if(!ctx) {
1352         ERR("Failed to create a WGL context\n");
1353         goto out;
1354     }
1355
1356     if (!device_context_add(device, ret))
1357     {
1358         ERR("Failed to add the newly created context to the context list\n");
1359         if (!pwglDeleteContext(ctx))
1360         {
1361             DWORD err = GetLastError();
1362             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, err);
1363         }
1364         goto out;
1365     }
1366
1367     ret->gl_info = gl_info;
1368
1369     /* Mark all states dirty to force a proper initialization of the states
1370      * on the first use of the context. */
1371     for (state = 0; state <= STATE_HIGHEST; ++state)
1372     {
1373         if (device->StateTable[state].representative)
1374             context_invalidate_state(ret, state, device->StateTable);
1375     }
1376
1377     ret->swapchain = swapchain;
1378     ret->current_rt = target;
1379     ret->tid = GetCurrentThreadId();
1380
1381     ret->render_offscreen = surface_is_offscreen(target);
1382     ret->draw_buffers_mask = generate_rt_mask(GL_BACK);
1383     ret->valid = 1;
1384
1385     ret->glCtx = ctx;
1386     ret->win_handle = swapchain->win_handle;
1387     ret->hdc = hdc;
1388     ret->pixel_format = pixel_format;
1389
1390     if (device->shader_backend->shader_dirtifyable_constants())
1391     {
1392         /* Create the dirty constants array and initialize them to dirty */
1393         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1394                 sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1395         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1396                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1397         memset(ret->vshader_const_dirty, 1,
1398                sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1399         memset(ret->pshader_const_dirty, 1,
1400                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1401     }
1402
1403     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1404             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1405     if (!ret->blit_targets) goto out;
1406
1407     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1408             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1409     if (!ret->draw_buffers) goto out;
1410
1411     ret->free_occlusion_query_size = 4;
1412     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1413             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1414     if (!ret->free_occlusion_queries) goto out;
1415
1416     list_init(&ret->occlusion_queries);
1417
1418     ret->free_event_query_size = 4;
1419     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1420             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1421     if (!ret->free_event_queries) goto out;
1422
1423     list_init(&ret->event_queries);
1424
1425     TRACE("Successfully created new context %p\n", ret);
1426
1427     list_init(&ret->fbo_list);
1428     list_init(&ret->fbo_destroy_list);
1429
1430     context_enter(ret);
1431
1432     /* Set up the context defaults */
1433     if (!context_set_current(ret))
1434     {
1435         ERR("Cannot activate context to set up defaults\n");
1436         context_release(ret);
1437         goto out;
1438     }
1439
1440     switch (swapchain->presentParms.PresentationInterval)
1441     {
1442         case WINED3DPRESENT_INTERVAL_IMMEDIATE:
1443             swap_interval = 0;
1444             break;
1445         case WINED3DPRESENT_INTERVAL_DEFAULT:
1446         case WINED3DPRESENT_INTERVAL_ONE:
1447             swap_interval = 1;
1448             break;
1449         case WINED3DPRESENT_INTERVAL_TWO:
1450             swap_interval = 2;
1451             break;
1452         case WINED3DPRESENT_INTERVAL_THREE:
1453             swap_interval = 3;
1454             break;
1455         case WINED3DPRESENT_INTERVAL_FOUR:
1456             swap_interval = 4;
1457             break;
1458         default:
1459             FIXME("Unknown presentation interval %08x\n", swapchain->presentParms.PresentationInterval);
1460             swap_interval = 1;
1461     }
1462
1463     if (gl_info->supported[WGL_EXT_SWAP_CONTROL])
1464     {
1465         if (!GL_EXTCALL(wglSwapIntervalEXT(swap_interval)))
1466             ERR("wglSwapIntervalEXT failed to set swap interval %d for context %p, last error %#x\n",
1467                 swap_interval, ret, GetLastError());
1468     }
1469
1470     ENTER_GL();
1471
1472     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1473
1474     TRACE("Setting up the screen\n");
1475     /* Clear the screen */
1476     glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
1477     checkGLcall("glClearColor");
1478     glClearIndex(0);
1479     glClearDepth(1);
1480     glClearStencil(0xffff);
1481
1482     checkGLcall("glClear");
1483
1484     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1485     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1486
1487     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1488     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1489
1490     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1491     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1492
1493     glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1494     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1495     glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1496     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1497
1498     if (gl_info->supported[APPLE_CLIENT_STORAGE])
1499     {
1500         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1501          * and textures in DIB sections(due to the memory protection).
1502          */
1503         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1504         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1505     }
1506     if (gl_info->supported[ARB_VERTEX_BLEND])
1507     {
1508         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1509          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1510          * GL_VERTEX_BLEND_ARB isn't enabled too
1511          */
1512         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1513         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1514     }
1515     if (gl_info->supported[NV_TEXTURE_SHADER2])
1516     {
1517         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1518          * the previous texture where to source the offset from is always unit - 1.
1519          */
1520         for (s = 1; s < gl_info->limits.textures; ++s)
1521         {
1522             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1523             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1524             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1525         }
1526     }
1527     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1528     {
1529         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1530          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1531          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1532          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1533          * is ever assigned.
1534          *
1535          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1536          * program and the dummy program is destroyed when the context is destroyed.
1537          */
1538         const char *dummy_program =
1539                 "!!ARBfp1.0\n"
1540                 "MOV result.color, fragment.color.primary;\n"
1541                 "END\n";
1542         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1543         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1544         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1545     }
1546
1547     for (s = 0; s < gl_info->limits.point_sprite_units; ++s)
1548     {
1549         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1550         glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1551         checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1552     }
1553
1554     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1555     {
1556         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1557     }
1558     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1559     {
1560         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1561     }
1562     device->frag_pipe->enable_extension(TRUE);
1563
1564     LEAVE_GL();
1565
1566     TRACE("Created context %p.\n", ret);
1567
1568     return ret;
1569
1570 out:
1571     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1572     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1573     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1574     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1575     HeapFree(GetProcessHeap(), 0, ret->pshader_const_dirty);
1576     HeapFree(GetProcessHeap(), 0, ret->vshader_const_dirty);
1577     HeapFree(GetProcessHeap(), 0, ret);
1578     return NULL;
1579 }
1580
1581 /* Do not call while under the GL lock. */
1582 void context_destroy(struct wined3d_device *device, struct wined3d_context *context)
1583 {
1584     BOOL destroy;
1585
1586     TRACE("Destroying ctx %p\n", context);
1587
1588     if (context->tid == GetCurrentThreadId() || !context->current)
1589     {
1590         context_destroy_gl_resources(context);
1591         TlsSetValue(wined3d_context_tls_idx, NULL);
1592         destroy = TRUE;
1593     }
1594     else
1595     {
1596         context->destroyed = 1;
1597         destroy = FALSE;
1598     }
1599
1600     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1601     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1602     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1603     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1604     device_context_remove(device, context);
1605     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1606 }
1607
1608 /* GL locking is done by the caller */
1609 static inline void set_blit_dimension(UINT width, UINT height) {
1610     glMatrixMode(GL_PROJECTION);
1611     checkGLcall("glMatrixMode(GL_PROJECTION)");
1612     glLoadIdentity();
1613     checkGLcall("glLoadIdentity()");
1614     glOrtho(0, width, 0, height, 0.0, -1.0);
1615     checkGLcall("glOrtho");
1616     glViewport(0, 0, width, height);
1617     checkGLcall("glViewport");
1618 }
1619
1620 /*****************************************************************************
1621  * SetupForBlit
1622  *
1623  * Sets up a context for DirectDraw blitting.
1624  * All texture units are disabled, texture unit 0 is set as current unit
1625  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1626  * color writing enabled for all channels
1627  * register combiners disabled, shaders disabled
1628  * world matrix is set to identity, texture matrix 0 too
1629  * projection matrix is setup for drawing screen coordinates
1630  *
1631  * Params:
1632  *  This: Device to activate the context for
1633  *  context: Context to setup
1634  *
1635  *****************************************************************************/
1636 /* Context activation is done by the caller. */
1637 static void SetupForBlit(struct wined3d_device *device, struct wined3d_context *context)
1638 {
1639     int i;
1640     const struct StateEntry *StateTable = device->StateTable;
1641     const struct wined3d_gl_info *gl_info = context->gl_info;
1642     UINT width = context->current_rt->resource.width;
1643     UINT height = context->current_rt->resource.height;
1644     DWORD sampler;
1645
1646     TRACE("Setting up context %p for blitting\n", context);
1647     if(context->last_was_blit) {
1648         if(context->blit_w != width || context->blit_h != height) {
1649             ENTER_GL();
1650             set_blit_dimension(width, height);
1651             LEAVE_GL();
1652             context->blit_w = width; context->blit_h = height;
1653             /* No need to dirtify here, the states are still dirtified because they weren't
1654              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1655              * be set
1656              */
1657         }
1658         TRACE("Context is already set up for blitting, nothing to do\n");
1659         return;
1660     }
1661     context->last_was_blit = TRUE;
1662
1663     /* TODO: Use a display list */
1664
1665     /* Disable shaders */
1666     ENTER_GL();
1667     device->shader_backend->shader_select(context, FALSE, FALSE);
1668     LEAVE_GL();
1669
1670     context_invalidate_state(context, STATE_VSHADER, StateTable);
1671     context_invalidate_state(context, STATE_PIXELSHADER, StateTable);
1672
1673     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1674      * helper functions in between gl calls. This function is full of context_invalidate_state
1675      * which can safely be called from here, we only lock once instead locking/unlocking
1676      * after each GL call.
1677      */
1678     ENTER_GL();
1679
1680     /* Disable all textures. The caller can then bind a texture it wants to blit
1681      * from
1682      *
1683      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1684      * function texture unit. No need to care for higher samplers
1685      */
1686     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1687     {
1688         sampler = device->rev_tex_unit_map[i];
1689         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1690         checkGLcall("glActiveTextureARB");
1691
1692         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1693         {
1694             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1695             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1696         }
1697         glDisable(GL_TEXTURE_3D);
1698         checkGLcall("glDisable GL_TEXTURE_3D");
1699         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1700         {
1701             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1702             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1703         }
1704         glDisable(GL_TEXTURE_2D);
1705         checkGLcall("glDisable GL_TEXTURE_2D");
1706
1707         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1708         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1709
1710         if (sampler != WINED3D_UNMAPPED_STAGE)
1711         {
1712             if (sampler < MAX_TEXTURES)
1713                 context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1714             context_invalidate_state(context, STATE_SAMPLER(sampler), StateTable);
1715         }
1716     }
1717     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1718     checkGLcall("glActiveTextureARB");
1719
1720     sampler = device->rev_tex_unit_map[0];
1721
1722     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1723     {
1724         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1725         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1726     }
1727     glDisable(GL_TEXTURE_3D);
1728     checkGLcall("glDisable GL_TEXTURE_3D");
1729     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1730     {
1731         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1732         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1733     }
1734     glDisable(GL_TEXTURE_2D);
1735     checkGLcall("glDisable GL_TEXTURE_2D");
1736
1737     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1738
1739     glMatrixMode(GL_TEXTURE);
1740     checkGLcall("glMatrixMode(GL_TEXTURE)");
1741     glLoadIdentity();
1742     checkGLcall("glLoadIdentity()");
1743
1744     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1745     {
1746         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1747                   GL_TEXTURE_LOD_BIAS_EXT,
1748                   0.0f);
1749         checkGLcall("glTexEnvf GL_TEXTURE_LOD_BIAS_EXT ...");
1750     }
1751
1752     if (sampler != WINED3D_UNMAPPED_STAGE)
1753     {
1754         if (sampler < MAX_TEXTURES)
1755         {
1756             context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1757             context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1758         }
1759         context_invalidate_state(context, STATE_SAMPLER(sampler), StateTable);
1760     }
1761
1762     /* Other misc states */
1763     glDisable(GL_ALPHA_TEST);
1764     checkGLcall("glDisable(GL_ALPHA_TEST)");
1765     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1766     glDisable(GL_LIGHTING);
1767     checkGLcall("glDisable GL_LIGHTING");
1768     context_invalidate_state(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1769     glDisable(GL_DEPTH_TEST);
1770     checkGLcall("glDisable GL_DEPTH_TEST");
1771     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1772     glDisableWINE(GL_FOG);
1773     checkGLcall("glDisable GL_FOG");
1774     context_invalidate_state(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1775     glDisable(GL_BLEND);
1776     checkGLcall("glDisable GL_BLEND");
1777     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1778     glDisable(GL_CULL_FACE);
1779     checkGLcall("glDisable GL_CULL_FACE");
1780     context_invalidate_state(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1781     glDisable(GL_STENCIL_TEST);
1782     checkGLcall("glDisable GL_STENCIL_TEST");
1783     context_invalidate_state(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1784     glDisable(GL_SCISSOR_TEST);
1785     checkGLcall("glDisable GL_SCISSOR_TEST");
1786     context_invalidate_state(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1787     if (gl_info->supported[ARB_POINT_SPRITE])
1788     {
1789         glDisable(GL_POINT_SPRITE_ARB);
1790         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1791         context_invalidate_state(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1792     }
1793     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1794     checkGLcall("glColorMask");
1795     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE), StateTable);
1796     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE1), StateTable);
1797     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE2), StateTable);
1798     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE3), StateTable);
1799     if (gl_info->supported[EXT_SECONDARY_COLOR])
1800     {
1801         glDisable(GL_COLOR_SUM_EXT);
1802         context_invalidate_state(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1803         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1804     }
1805
1806     /* Setup transforms */
1807     glMatrixMode(GL_MODELVIEW);
1808     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1809     glLoadIdentity();
1810     checkGLcall("glLoadIdentity()");
1811     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1812
1813     context->last_was_rhw = TRUE;
1814     context_invalidate_state(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1815
1816     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1817     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1818     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1819     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1820     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1821     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1822     context_invalidate_state(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1823
1824     set_blit_dimension(width, height);
1825     device->frag_pipe->enable_extension(FALSE);
1826
1827     LEAVE_GL();
1828
1829     context->blit_w = width; context->blit_h = height;
1830     context_invalidate_state(context, STATE_VIEWPORT, StateTable);
1831     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1832 }
1833
1834 /* Do not call while under the GL lock. */
1835 static struct wined3d_context *FindContext(const struct wined3d_device *device, const struct wined3d_surface *target)
1836 {
1837     struct wined3d_context *current_context = context_get_current();
1838     struct wined3d_context *context;
1839
1840     if (current_context && current_context->destroyed) current_context = NULL;
1841
1842     if (!target)
1843     {
1844         if (current_context
1845                 && current_context->current_rt
1846                 && current_context->swapchain->device == device)
1847         {
1848             target = current_context->current_rt;
1849         }
1850         else
1851         {
1852             struct wined3d_swapchain *swapchain = device->swapchains[0];
1853             if (swapchain->back_buffers) target = swapchain->back_buffers[0];
1854             else target = swapchain->front_buffer;
1855         }
1856     }
1857
1858     if (current_context && current_context->current_rt == target)
1859     {
1860         context_update_window(current_context);
1861         return current_context;
1862     }
1863
1864     if (target->container.type == WINED3D_CONTAINER_SWAPCHAIN)
1865     {
1866         TRACE("Rendering onscreen\n");
1867
1868         context = swapchain_get_context(target->container.u.swapchain);
1869     }
1870     else
1871     {
1872         TRACE("Rendering offscreen\n");
1873
1874         /* Stay with the current context if possible. Otherwise use the
1875          * context for the primary swapchain. */
1876         if (current_context && current_context->swapchain->device == device)
1877             context = current_context;
1878         else
1879             context = swapchain_get_context(device->swapchains[0]);
1880     }
1881
1882     context_update_window(context);
1883
1884     return context;
1885 }
1886
1887 static inline BOOL is_rt_mask_onscreen(DWORD rt_mask)
1888 {
1889     return rt_mask & (1 << 31);
1890 }
1891
1892 static inline GLenum draw_buffer_from_rt_mask(DWORD rt_mask)
1893 {
1894     return rt_mask & ~(1 << 31);
1895 }
1896
1897 /* Context activation and GL locking are done by the caller. */
1898 static void context_apply_draw_buffers(struct wined3d_context *context, DWORD rt_mask)
1899 {
1900     if (!rt_mask)
1901     {
1902         glDrawBuffer(GL_NONE);
1903         checkGLcall("glDrawBuffer()");
1904     }
1905     else if (is_rt_mask_onscreen(rt_mask))
1906     {
1907         glDrawBuffer(draw_buffer_from_rt_mask(rt_mask));
1908         checkGLcall("glDrawBuffer()");
1909     }
1910     else
1911     {
1912         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1913         {
1914             const struct wined3d_gl_info *gl_info = context->gl_info;
1915             unsigned int i = 0;
1916
1917             while (rt_mask)
1918             {
1919                 if (rt_mask & 1)
1920                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
1921                 else
1922                     context->draw_buffers[i] = GL_NONE;
1923
1924                 rt_mask >>= 1;
1925                 ++i;
1926             }
1927
1928             if (gl_info->supported[ARB_DRAW_BUFFERS])
1929             {
1930                 GL_EXTCALL(glDrawBuffersARB(i, context->draw_buffers));
1931                 checkGLcall("glDrawBuffers()");
1932             }
1933             else
1934             {
1935                 glDrawBuffer(context->draw_buffers[0]);
1936                 checkGLcall("glDrawBuffer()");
1937             }
1938         }
1939         else
1940         {
1941             ERR("Unexpected draw buffers mask with backbuffer ORM.\n");
1942         }
1943     }
1944 }
1945
1946 /* GL locking is done by the caller. */
1947 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
1948 {
1949     glDrawBuffer(buffer);
1950     checkGLcall("glDrawBuffer()");
1951     context->draw_buffers_mask = generate_rt_mask(buffer);
1952 }
1953
1954 static inline void context_set_render_offscreen(struct wined3d_context *context, const struct StateEntry *StateTable,
1955         BOOL offscreen)
1956 {
1957     if (context->render_offscreen == offscreen) return;
1958
1959     context_invalidate_state(context, STATE_POINTSPRITECOORDORIGIN, StateTable);
1960     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1961     context_invalidate_state(context, STATE_VIEWPORT, StateTable);
1962     context_invalidate_state(context, STATE_SCISSORRECT, StateTable);
1963     context_invalidate_state(context, STATE_FRONTFACE, StateTable);
1964     context->render_offscreen = offscreen;
1965 }
1966
1967 static BOOL match_depth_stencil_format(const struct wined3d_format *existing,
1968         const struct wined3d_format *required)
1969 {
1970     BYTE existing_depth, existing_stencil, required_depth, required_stencil;
1971
1972     if (existing == required) return TRUE;
1973     if ((existing->flags & WINED3DFMT_FLAG_FLOAT) != (required->flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
1974
1975     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
1976     getDepthStencilBits(required, &required_depth, &required_stencil);
1977
1978     if(existing_depth < required_depth) return FALSE;
1979     /* If stencil bits are used the exact amount is required - otherwise wrapping
1980      * won't work correctly */
1981     if(required_stencil && required_stencil != existing_stencil) return FALSE;
1982     return TRUE;
1983 }
1984
1985 /* The caller provides a context */
1986 static void context_validate_onscreen_formats(struct wined3d_device *device,
1987         struct wined3d_context *context, const struct wined3d_surface *depth_stencil)
1988 {
1989     /* Onscreen surfaces are always in a swapchain */
1990     struct wined3d_swapchain *swapchain = context->current_rt->container.u.swapchain;
1991
1992     if (context->render_offscreen || !depth_stencil) return;
1993     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format)) return;
1994
1995     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
1996      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
1997      * format. */
1998     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
1999
2000     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2001     surface_load_location(context->current_rt, SFLAG_INTEXTURE, NULL);
2002     swapchain->render_to_fbo = TRUE;
2003     context_set_render_offscreen(context, device->StateTable, TRUE);
2004 }
2005
2006 static DWORD generate_rt_mask_no_fbo(const struct wined3d_device *device, const struct wined3d_surface *rt)
2007 {
2008     if (!rt || rt->resource.format->id == WINED3DFMT_NULL)
2009         return 0;
2010     else if (rt->container.type == WINED3D_CONTAINER_SWAPCHAIN)
2011         return generate_rt_mask_from_surface(rt);
2012     else
2013         return generate_rt_mask(device->offscreenBuffer);
2014 }
2015
2016 /* Context activation is done by the caller. */
2017 void context_apply_blit_state(struct wined3d_context *context, struct wined3d_device *device)
2018 {
2019     DWORD rt_mask;
2020
2021     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2022     {
2023         context_validate_onscreen_formats(device, context, NULL);
2024
2025         if (context->render_offscreen)
2026         {
2027             surface_internal_preload(context->current_rt, SRGB_RGB);
2028
2029             ENTER_GL();
2030             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, context->current_rt, NULL, SFLAG_INTEXTURE);
2031             LEAVE_GL();
2032             if (context->current_rt && context->current_rt->resource.format->id != WINED3DFMT_NULL)
2033                 rt_mask = 1;
2034             else
2035                 rt_mask = 0;
2036         }
2037         else
2038         {
2039             ENTER_GL();
2040             context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
2041             LEAVE_GL();
2042             rt_mask = generate_rt_mask_from_surface(context->current_rt);
2043         }
2044     }
2045     else
2046     {
2047         rt_mask = generate_rt_mask_no_fbo(device, context->current_rt);
2048     }
2049
2050     ENTER_GL();
2051     if (rt_mask != context->draw_buffers_mask)
2052     {
2053         context_apply_draw_buffers(context, rt_mask);
2054         context->draw_buffers_mask = rt_mask;
2055     }
2056
2057     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2058     {
2059         context_check_fbo_status(context, GL_FRAMEBUFFER);
2060     }
2061     LEAVE_GL();
2062
2063     SetupForBlit(device, context);
2064 }
2065
2066 static BOOL context_validate_rt_config(UINT rt_count,
2067         struct wined3d_surface * const *rts, const struct wined3d_surface *ds)
2068 {
2069     unsigned int i;
2070
2071     if (ds) return TRUE;
2072
2073     for (i = 0; i < rt_count; ++i)
2074     {
2075         if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2076             return TRUE;
2077     }
2078
2079     WARN("Invalid render target config, need at least one attachment.\n");
2080     return FALSE;
2081 }
2082
2083 /* Context activation is done by the caller. */
2084 BOOL context_apply_clear_state(struct wined3d_context *context, struct wined3d_device *device,
2085         UINT rt_count, struct wined3d_surface **rts, struct wined3d_surface *depth_stencil)
2086 {
2087     const struct StateEntry *state_table = device->StateTable;
2088     DWORD rt_mask = 0;
2089     UINT i;
2090
2091     if (!context_validate_rt_config(rt_count, rts, depth_stencil))
2092         return FALSE;
2093
2094
2095     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2096     {
2097         context_validate_onscreen_formats(device, context, depth_stencil);
2098
2099         ENTER_GL();
2100
2101         if (!rt_count || surface_is_offscreen(rts[0]))
2102         {
2103             for (i = 0; i < rt_count; ++i)
2104             {
2105                 context->blit_targets[i] = rts[i];
2106                 if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2107                     rt_mask |= (1 << i);
2108             }
2109             while (i < context->gl_info->limits.buffers)
2110             {
2111                 context->blit_targets[i] = NULL;
2112                 ++i;
2113             }
2114             context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets, depth_stencil, SFLAG_INTEXTURE);
2115             glReadBuffer(GL_NONE);
2116             checkGLcall("glReadBuffer");
2117         }
2118         else
2119         {
2120             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2121             rt_mask = generate_rt_mask_from_surface(rts[0]);
2122         }
2123
2124         LEAVE_GL();
2125     }
2126     else
2127     {
2128         rt_mask = generate_rt_mask_no_fbo(device, rts[0]);
2129     }
2130
2131     ENTER_GL();
2132     if (rt_mask != context->draw_buffers_mask)
2133     {
2134         context_apply_draw_buffers(context, rt_mask);
2135         context->draw_buffers_mask = rt_mask;
2136     }
2137
2138     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2139     {
2140         context_check_fbo_status(context, GL_FRAMEBUFFER);
2141     }
2142
2143     if (context->last_was_blit)
2144     {
2145         device->frag_pipe->enable_extension(TRUE);
2146         context->last_was_blit = FALSE;
2147     }
2148
2149     /* Blending and clearing should be orthogonal, but tests on the nvidia
2150      * driver show that disabling blending when clearing improves the clearing
2151      * performance incredibly. */
2152     glDisable(GL_BLEND);
2153     glEnable(GL_SCISSOR_TEST);
2154     checkGLcall("glEnable GL_SCISSOR_TEST");
2155     LEAVE_GL();
2156
2157     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), state_table);
2158     context_invalidate_state(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), state_table);
2159     context_invalidate_state(context, STATE_SCISSORRECT, state_table);
2160
2161     return TRUE;
2162 }
2163
2164 /* Context activation is done by the caller. */
2165 BOOL context_apply_draw_state(struct wined3d_context *context, struct wined3d_device *device)
2166 {
2167     const struct StateEntry *state_table = device->StateTable;
2168     const struct wined3d_fb_state *fb = &device->fb;
2169     unsigned int i;
2170     DWORD rt_mask;
2171
2172     if (!context_validate_rt_config(context->gl_info->limits.buffers,
2173             fb->render_targets, fb->depth_stencil))
2174         return FALSE;
2175
2176     /* Preload resources before FBO setup. Texture preload in particular may
2177      * result in changes to the current FBO, due to using e.g. FBO blits for
2178      * updating a resource location. */
2179     device_update_tex_unit_map(device);
2180     device_preload_textures(device);
2181     if (isStateDirty(context, STATE_VDECL) || isStateDirty(context, STATE_STREAMSRC))
2182         device_update_stream_info(device, context->gl_info);
2183
2184     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2185     {
2186         context_validate_onscreen_formats(device, context, fb->depth_stencil);
2187
2188         if (!context->render_offscreen)
2189         {
2190             ENTER_GL();
2191             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2192             LEAVE_GL();
2193             rt_mask = generate_rt_mask_from_surface(fb->render_targets[0]);
2194         }
2195         else
2196         {
2197             const struct wined3d_shader *ps = device->stateBlock->state.pixel_shader;
2198             DWORD rt_mask_bits;
2199             struct wined3d_surface **rts = fb->render_targets;
2200
2201             ENTER_GL();
2202             context_apply_fbo_state(context, GL_FRAMEBUFFER, fb->render_targets, fb->depth_stencil, SFLAG_INTEXTURE);
2203             glReadBuffer(GL_NONE);
2204             checkGLcall("glReadBuffer");
2205             LEAVE_GL();
2206             rt_mask = ps ? ps->reg_maps.rt_mask : 1;
2207             rt_mask &= device->valid_rt_mask;
2208             rt_mask_bits = rt_mask;
2209             i = 0;
2210             while (rt_mask_bits)
2211             {
2212                 rt_mask_bits &= ~(1 << i);
2213                 if (!rts[i] || rts[i]->resource.format->id == WINED3DFMT_NULL)
2214                     rt_mask &= ~(1 << i);
2215
2216                 i++;
2217             }
2218         }
2219     }
2220     else
2221     {
2222         rt_mask = generate_rt_mask_no_fbo(device, fb->render_targets[0]);
2223     }
2224
2225     ENTER_GL();
2226     if (context->draw_buffers_mask != rt_mask)
2227     {
2228         context_apply_draw_buffers(context, rt_mask);
2229         context->draw_buffers_mask = rt_mask;
2230     }
2231
2232     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2233     {
2234         context_check_fbo_status(context, GL_FRAMEBUFFER);
2235     }
2236
2237     if (context->last_was_blit)
2238     {
2239         device->frag_pipe->enable_extension(TRUE);
2240     }
2241
2242     for (i = 0; i < context->numDirtyEntries; ++i)
2243     {
2244         DWORD rep = context->dirtyArray[i];
2245         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
2246         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
2247         context->isStateDirty[idx] &= ~(1 << shift);
2248         state_table[rep].apply(rep, device->stateBlock, context);
2249     }
2250     LEAVE_GL();
2251     context->numDirtyEntries = 0; /* This makes the whole list clean */
2252     context->last_was_blit = FALSE;
2253
2254     return TRUE;
2255 }
2256
2257 static void context_setup_target(struct wined3d_device *device,
2258         struct wined3d_context *context, struct wined3d_surface *target)
2259 {
2260     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2261     const struct StateEntry *StateTable = device->StateTable;
2262
2263     if (!target) return;
2264     render_offscreen = surface_is_offscreen(target);
2265     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
2266
2267     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2268      * the alpha blend state changes with different render target formats. */
2269     if (!context->current_rt)
2270     {
2271         context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2272     }
2273     else
2274     {
2275         const struct wined3d_format *old = context->current_rt->resource.format;
2276         const struct wined3d_format *new = target->resource.format;
2277
2278         if (old->id != new->id)
2279         {
2280             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2281             if ((old->alpha_mask && !new->alpha_mask) || (!old->alpha_mask && new->alpha_mask)
2282                     || !(new->flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2283                 context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2284
2285             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
2286             if ((old->flags & WINED3DFMT_FLAG_SRGB_WRITE) != (new->flags & WINED3DFMT_FLAG_SRGB_WRITE))
2287                 context_invalidate_state(context, STATE_RENDER(WINED3DRS_SRGBWRITEENABLE), StateTable);
2288         }
2289
2290         /* When switching away from an offscreen render target, and we're not
2291          * using FBOs, we have to read the drawable into the texture. This is
2292          * done via PreLoad (and SFLAG_INDRAWABLE set on the surface). There
2293          * are some things that need care though. PreLoad needs a GL context,
2294          * and FindContext is called before the context is activated. It also
2295          * has to be called with the old rendertarget active, otherwise a
2296          * wrong drawable is read. */
2297         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2298                 && old_render_offscreen && context->current_rt != target)
2299         {
2300             /* Read the back buffer of the old drawable into the destination texture. */
2301             if (context->current_rt->texture_name_srgb)
2302                 surface_internal_preload(context->current_rt, SRGB_SRGB);
2303             surface_internal_preload(context->current_rt, SRGB_RGB);
2304             surface_modify_location(context->current_rt, SFLAG_INDRAWABLE, FALSE);
2305         }
2306     }
2307
2308     context->current_rt = target;
2309     context_set_render_offscreen(context, StateTable, render_offscreen);
2310 }
2311
2312 /* Do not call while under the GL lock. */
2313 struct wined3d_context *context_acquire(struct wined3d_device *device, struct wined3d_surface *target)
2314 {
2315     struct wined3d_context *current_context = context_get_current();
2316     struct wined3d_context *context;
2317
2318     TRACE("device %p, target %p.\n", device, target);
2319
2320     context = FindContext(device, target);
2321     context_setup_target(device, context, target);
2322     context_enter(context);
2323     if (!context->valid) return context;
2324
2325     if (context != current_context)
2326     {
2327         if (!context_set_current(context))
2328         {
2329             ERR("Failed to activate the new context.\n");
2330         }
2331         else
2332         {
2333             ENTER_GL();
2334             device->frag_pipe->enable_extension(!context->last_was_blit);
2335             LEAVE_GL();
2336         }
2337
2338         if (context->vshader_const_dirty)
2339         {
2340             memset(context->vshader_const_dirty, 1,
2341                     sizeof(*context->vshader_const_dirty) * device->d3d_vshader_constantF);
2342             device->highest_dirty_vs_const = device->d3d_vshader_constantF;
2343         }
2344         if (context->pshader_const_dirty)
2345         {
2346             memset(context->pshader_const_dirty, 1,
2347                    sizeof(*context->pshader_const_dirty) * device->d3d_pshader_constantF);
2348             device->highest_dirty_ps_const = device->d3d_pshader_constantF;
2349         }
2350     }
2351     else if (context->restore_ctx)
2352     {
2353         context_set_gl_context(context);
2354     }
2355
2356     return context;
2357 }