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 static 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 static void context_attach_depth_stencil_rb(const struct wined3d_gl_info *gl_info,
 115         GLenum fbo_target, DWORD format_flags, GLuint rb)
 116 {
 117     if (format_flags & WINED3DFMT_FLAG_DEPTH)
 118     {
 119         gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rb);
 120         checkGLcall("glFramebufferRenderbuffer()");
 121     }
 122
 123     if (format_flags & WINED3DFMT_FLAG_STENCIL)
 124     {
 125         gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rb);
 126         checkGLcall("glFramebufferRenderbuffer()");
 127     }
 128 }
 129
 130 /* GL locking is done by the caller */
 131 static void context_attach_depth_stencil_fbo(struct wined3d_context *context,
 132         GLenum fbo_target, struct wined3d_surface *depth_stencil, DWORD location)
 133 {
 134     const struct wined3d_gl_info *gl_info = context->gl_info;
 135
 136     TRACE("Attach depth stencil %p\n", depth_stencil);
 137
 138     if (depth_stencil)
 139     {
 140         DWORD format_flags = depth_stencil->resource.format->flags;
 141
 142         if (depth_stencil->current_renderbuffer)
 143         {
 144             context_attach_depth_stencil_rb(gl_info, fbo_target,
 145                     format_flags, depth_stencil->current_renderbuffer->id);
 146         }
 147         else
 148         {
 149             switch (location)
 150             {
 151                 case SFLAG_INTEXTURE:
 152                 case SFLAG_INSRGBTEX:
 153                     surface_prepare_texture(depth_stencil, context, FALSE);
 154
 155                     if (format_flags & WINED3DFMT_FLAG_DEPTH)
 156                     {
 157                         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT,
 158                                 depth_stencil->texture_target, depth_stencil->texture_name,
 159                                 depth_stencil->texture_level);
 160                         checkGLcall("glFramebufferTexture2D()");
 161                     }
 162
 163                     if (format_flags & WINED3DFMT_FLAG_STENCIL)
 164                     {
 165                         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT,
 166                                 depth_stencil->texture_target, depth_stencil->texture_name,
 167                                 depth_stencil->texture_level);
 168                         checkGLcall("glFramebufferTexture2D()");
 169                     }
 170                     break;
 171
 172                 case SFLAG_INRB_MULTISAMPLE:
 173                     surface_prepare_rb(depth_stencil, gl_info, TRUE);
 174                     context_attach_depth_stencil_rb(gl_info, fbo_target,
 175                             format_flags, depth_stencil->rb_multisample);
 176                     break;
 177
 178                 case SFLAG_INRB_RESOLVED:
 179                     surface_prepare_rb(depth_stencil, gl_info, FALSE);
 180                     context_attach_depth_stencil_rb(gl_info, fbo_target,
 181                             format_flags, depth_stencil->rb_resolved);
 182                     break;
 183
 184                 default:
 185                     ERR("Unsupported location %s (%#x).\n", debug_surflocation(location), location);
 186                     break;
 187             }
 188         }
 189
 190         if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
 191         {
 192             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 193             checkGLcall("glFramebufferTexture2D()");
 194         }
 195
 196         if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
 197         {
 198             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 199             checkGLcall("glFramebufferTexture2D()");
 200         }
 201     }
 202     else
 203     {
 204         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 205         checkGLcall("glFramebufferTexture2D()");
 206
 207         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 208         checkGLcall("glFramebufferTexture2D()");
 209     }
 210 }
 211
 212 /* GL locking is done by the caller */
 213 static void context_attach_surface_fbo(struct wined3d_context *context,
 214         GLenum fbo_target, DWORD idx, struct wined3d_surface *surface, DWORD location)
 215 {
 216     const struct wined3d_gl_info *gl_info = context->gl_info;
 217
 218     TRACE("Attach surface %p to %u\n", surface, idx);
 219
 220     if (surface && surface->resource.format->id != WINED3DFMT_NULL)
 221     {
 222         BOOL srgb;
 223
 224         switch (location)
 225         {
 226             case SFLAG_INTEXTURE:
 227             case SFLAG_INSRGBTEX:
 228                 srgb = location == SFLAG_INSRGBTEX;
 229                 surface_prepare_texture(surface, context, srgb);
 230                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 231                         surface->texture_target, surface_get_texture_name(surface, gl_info, srgb),
 232                         surface->texture_level);
 233                 checkGLcall("glFramebufferTexture2D()");
 234                 break;
 235
 236             case SFLAG_INRB_MULTISAMPLE:
 237                 surface_prepare_rb(surface, gl_info, TRUE);
 238                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 239                         GL_RENDERBUFFER, surface->rb_multisample);
 240                 checkGLcall("glFramebufferRenderbuffer()");
 241                 break;
 242
 243             case SFLAG_INRB_RESOLVED:
 244                 surface_prepare_rb(surface, gl_info, FALSE);
 245                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 246                         GL_RENDERBUFFER, surface->rb_resolved);
 247                 checkGLcall("glFramebufferRenderbuffer()");
 248                 break;
 249
 250             default:
 251                 ERR("Unsupported location %s (%#x).\n", debug_surflocation(location), location);
 252                 break;
 253         }
 254     }
 255     else
 256     {
 257         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, GL_TEXTURE_2D, 0, 0);
 258         checkGLcall("glFramebufferTexture2D()");
 259     }
 260 }
 261
 262 /* GL locking is done by the caller */
 263 void context_check_fbo_status(const struct wined3d_context *context, GLenum target)
 264 {
 265     const struct wined3d_gl_info *gl_info = context->gl_info;
 266     GLenum status;
 267
 268     if (!FIXME_ON(d3d)) return;
 269
 270     status = gl_info->fbo_ops.glCheckFramebufferStatus(target);
 271     if (status == GL_FRAMEBUFFER_COMPLETE)
 272     {
 273         TRACE("FBO complete\n");
 274     }
 275     else
 276     {
 277         const struct wined3d_surface *attachment;
 278         unsigned int i;
 279
 280         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 281
 282         if (!context->current_fbo)
 283         {
 284             ERR("FBO 0 is incomplete, driver bug?\n");
 285             return;
 286         }
 287
 288         FIXME("\tLocation %s (%#x).\n", debug_surflocation(context->current_fbo->location),
 289                 context->current_fbo->location);
 290
 291         /* Dump the FBO attachments */
 292         for (i = 0; i < gl_info->limits.buffers; ++i)
 293         {
 294             attachment = context->current_fbo->render_targets[i];
 295             if (attachment)
 296             {
 297                 FIXME("\tColor attachment %d: (%p) %s %ux%u %u samples.\n",
 298                         i, attachment, debug_d3dformat(attachment->resource.format->id),
 299                         attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 300             }
 301         }
 302         attachment = context->current_fbo->depth_stencil;
 303         if (attachment)
 304         {
 305             FIXME("\tDepth attachment: (%p) %s %ux%u %u samples.\n",
 306                     attachment, debug_d3dformat(attachment->resource.format->id),
 307                     attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 308         }
 309     }
 310 }
 311
 312 static inline DWORD context_generate_rt_mask(GLenum buffer)
 313 {
 314     /* Should take care of all the GL_FRONT/GL_BACK/GL_AUXi/GL_NONE... cases */
 315     return buffer ? (1 << 31) | buffer : 0;
 316 }
 317
 318 static inline DWORD context_generate_rt_mask_from_surface(const struct wined3d_surface *target)
 319 {
 320     return (1 << 31) | surface_get_gl_buffer(target);
 321 }
 322
 323 static struct fbo_entry *context_create_fbo_entry(const struct wined3d_context *context,
 324         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 325 {
 326     const struct wined3d_gl_info *gl_info = context->gl_info;
 327     struct fbo_entry *entry;
 328
 329     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 330     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
 331     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 332     entry->depth_stencil = depth_stencil;
 333     entry->location = location;
 334     entry->rt_mask = context_generate_rt_mask(GL_COLOR_ATTACHMENT0);
 335     entry->attached = FALSE;
 336     entry->id = 0;
 337
 338     return entry;
 339 }
 340
 341 /* GL locking is done by the caller */
 342 static void context_reuse_fbo_entry(struct wined3d_context *context, GLenum target,
 343         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 344         DWORD location, struct fbo_entry *entry)
 345 {
 346     const struct wined3d_gl_info *gl_info = context->gl_info;
 347
 348     context_bind_fbo(context, target, &entry->id);
 349     context_clean_fbo_attachments(gl_info, target);
 350
 351     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 352     entry->depth_stencil = depth_stencil;
 353     entry->location = location;
 354     entry->attached = FALSE;
 355 }
 356
 357 /* GL locking is done by the caller */
 358 static void context_destroy_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 359 {
 360     if (entry->id)
 361     {
 362         TRACE("Destroy FBO %d\n", entry->id);
 363         context_destroy_fbo(context, &entry->id);
 364     }
 365     --context->fbo_entry_count;
 366     list_remove(&entry->entry);
 367     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 368     HeapFree(GetProcessHeap(), 0, entry);
 369 }
 370
 371
 372 /* GL locking is done by the caller */
 373 static struct fbo_entry *context_find_fbo_entry(struct wined3d_context *context, GLenum target,
 374         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 375 {
 376     const struct wined3d_gl_info *gl_info = context->gl_info;
 377     struct fbo_entry *entry;
 378
 379     if (depth_stencil && render_targets && render_targets[0])
 380     {
 381         if (depth_stencil->resource.width < render_targets[0]->resource.width ||
 382             depth_stencil->resource.height < render_targets[0]->resource.height)
 383         {
 384             WARN("Depth stencil is smaller than the primary color buffer, disabling\n");
 385             depth_stencil = NULL;
 386         }
 387     }
 388
 389     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 390     {
 391         if (!memcmp(entry->render_targets,
 392                 render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
 393                 && entry->depth_stencil == depth_stencil && entry->location == location)
 394         {
 395             list_remove(&entry->entry);
 396             list_add_head(&context->fbo_list, &entry->entry);
 397             return entry;
 398         }
 399     }
 400
 401     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 402     {
 403         entry = context_create_fbo_entry(context, render_targets, depth_stencil, location);
 404         list_add_head(&context->fbo_list, &entry->entry);
 405         ++context->fbo_entry_count;
 406     }
 407     else
 408     {
 409         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 410         context_reuse_fbo_entry(context, target, render_targets, depth_stencil, location, entry);
 411         list_remove(&entry->entry);
 412         list_add_head(&context->fbo_list, &entry->entry);
 413     }
 414
 415     return entry;
 416 }
 417
 418 /* GL locking is done by the caller */
 419 static void context_apply_fbo_entry(struct wined3d_context *context, GLenum target, struct fbo_entry *entry)
 420 {
 421     const struct wined3d_gl_info *gl_info = context->gl_info;
 422     unsigned int i;
 423
 424     context_bind_fbo(context, target, &entry->id);
 425
 426     if (entry->attached) return;
 427
 428     /* Apply render targets */
 429     for (i = 0; i < gl_info->limits.buffers; ++i)
 430     {
 431         context_attach_surface_fbo(context, target, i, entry->render_targets[i], entry->location);
 432     }
 433
 434     /* Apply depth targets */
 435     if (entry->depth_stencil)
 436         surface_set_compatible_renderbuffer(entry->depth_stencil, entry->render_targets[0]);
 437     context_attach_depth_stencil_fbo(context, target, entry->depth_stencil, entry->location);
 438
 439     entry->attached = TRUE;
 440 }
 441
 442 /* GL locking is done by the caller */
 443 static void context_apply_fbo_state(struct wined3d_context *context, GLenum target,
 444         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 445 {
 446     struct fbo_entry *entry, *entry2;
 447
 448     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 449     {
 450         context_destroy_fbo_entry(context, entry);
 451     }
 452
 453     if (context->rebind_fbo)
 454     {
 455         context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
 456         context->rebind_fbo = FALSE;
 457     }
 458
 459     if (location == SFLAG_INDRAWABLE)
 460     {
 461         context->current_fbo = NULL;
 462         context_bind_fbo(context, target, NULL);
 463     }
 464     else
 465     {
 466         context->current_fbo = context_find_fbo_entry(context, target, render_targets, depth_stencil, location);
 467         context_apply_fbo_entry(context, target, context->current_fbo);
 468     }
 469 }
 470
 471 /* GL locking is done by the caller */
 472 void context_apply_fbo_state_blit(struct wined3d_context *context, GLenum target,
 473         struct wined3d_surface *render_target, struct wined3d_surface *depth_stencil, DWORD location)
 474 {
 475     UINT clear_size = (context->gl_info->limits.buffers - 1) * sizeof(*context->blit_targets);
 476
 477     context->blit_targets[0] = render_target;
 478     if (clear_size)
 479         memset(&context->blit_targets[1], 0, clear_size);
 480     context_apply_fbo_state(context, target, context->blit_targets, depth_stencil, location);
 481 }
 482
 483 /* Context activation is done by the caller. */
 484 void context_alloc_occlusion_query(struct wined3d_context *context, struct wined3d_occlusion_query *query)
 485 {
 486     const struct wined3d_gl_info *gl_info = context->gl_info;
 487
 488     if (context->free_occlusion_query_count)
 489     {
 490         query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
 491     }
 492     else
 493     {
 494         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 495         {
 496             ENTER_GL();
 497             GL_EXTCALL(glGenQueriesARB(1, &query->id));
 498             checkGLcall("glGenQueriesARB");
 499             LEAVE_GL();
 500
 501             TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
 502         }
 503         else
 504         {
 505             WARN("Occlusion queries not supported, not allocating query id.\n");
 506             query->id = 0;
 507         }
 508     }
 509
 510     query->context = context;
 511     list_add_head(&context->occlusion_queries, &query->entry);
 512 }
 513
 514 void context_free_occlusion_query(struct wined3d_occlusion_query *query)
 515 {
 516     struct wined3d_context *context = query->context;
 517
 518     list_remove(&query->entry);
 519     query->context = NULL;
 520
 521     if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
 522     {
 523         UINT new_size = context->free_occlusion_query_size << 1;
 524         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
 525                 new_size * sizeof(*context->free_occlusion_queries));
 526
 527         if (!new_data)
 528         {
 529             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 530             return;
 531         }
 532
 533         context->free_occlusion_query_size = new_size;
 534         context->free_occlusion_queries = new_data;
 535     }
 536
 537     context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
 538 }
 539
 540 /* Context activation is done by the caller. */
 541 void context_alloc_event_query(struct wined3d_context *context, struct wined3d_event_query *query)
 542 {
 543     const struct wined3d_gl_info *gl_info = context->gl_info;
 544
 545     if (context->free_event_query_count)
 546     {
 547         query->object = context->free_event_queries[--context->free_event_query_count];
 548     }
 549     else
 550     {
 551         if (gl_info->supported[ARB_SYNC])
 552         {
 553             /* Using ARB_sync, not much to do here. */
 554             query->object.sync = NULL;
 555             TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
 556         }
 557         else if (gl_info->supported[APPLE_FENCE])
 558         {
 559             ENTER_GL();
 560             GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
 561             checkGLcall("glGenFencesAPPLE");
 562             LEAVE_GL();
 563
 564             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 565         }
 566         else if(gl_info->supported[NV_FENCE])
 567         {
 568             ENTER_GL();
 569             GL_EXTCALL(glGenFencesNV(1, &query->object.id));
 570             checkGLcall("glGenFencesNV");
 571             LEAVE_GL();
 572
 573             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 574         }
 575         else
 576         {
 577             WARN("Event queries not supported, not allocating query id.\n");
 578             query->object.id = 0;
 579         }
 580     }
 581
 582     query->context = context;
 583     list_add_head(&context->event_queries, &query->entry);
 584 }
 585
 586 void context_free_event_query(struct wined3d_event_query *query)
 587 {
 588     struct wined3d_context *context = query->context;
 589
 590     list_remove(&query->entry);
 591     query->context = NULL;
 592
 593     if (context->free_event_query_count >= context->free_event_query_size - 1)
 594     {
 595         UINT new_size = context->free_event_query_size << 1;
 596         union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
 597                 new_size * sizeof(*context->free_event_queries));
 598
 599         if (!new_data)
 600         {
 601             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
 602             return;
 603         }
 604
 605         context->free_event_query_size = new_size;
 606         context->free_event_queries = new_data;
 607     }
 608
 609     context->free_event_queries[context->free_event_query_count++] = query->object;
 610 }
 611
 612 typedef void (context_fbo_entry_func_t)(struct wined3d_context *context, struct fbo_entry *entry);
 613
 614 static void context_enum_surface_fbo_entries(const struct wined3d_device *device,
 615         const struct wined3d_surface *surface, context_fbo_entry_func_t *callback)
 616 {
 617     UINT i;
 618
 619     for (i = 0; i < device->context_count; ++i)
 620     {
 621         struct wined3d_context *context = device->contexts[i];
 622         const struct wined3d_gl_info *gl_info = context->gl_info;
 623         struct fbo_entry *entry, *entry2;
 624
 625         if (context->current_rt == surface) context->current_rt = NULL;
 626
 627         LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 628         {
 629             UINT j;
 630
 631             if (entry->depth_stencil == surface)
 632             {
 633                 callback(context, entry);
 634                 continue;
 635             }
 636
 637             for (j = 0; j < gl_info->limits.buffers; ++j)
 638             {
 639                 if (entry->render_targets[j] == surface)
 640                 {
 641                     callback(context, entry);
 642                     break;
 643                 }
 644             }
 645         }
 646     }
 647 }
 648
 649 static void context_queue_fbo_entry_destruction(struct wined3d_context *context, struct fbo_entry *entry)
 650 {
 651     list_remove(&entry->entry);
 652     list_add_head(&context->fbo_destroy_list, &entry->entry);
 653 }
 654
 655 void context_resource_released(const struct wined3d_device *device,
 656         struct wined3d_resource *resource, WINED3DRESOURCETYPE type)
 657 {
 658     if (!device->d3d_initialized) return;
 659
 660     switch (type)
 661     {
 662         case WINED3DRTYPE_SURFACE:
 663             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 664                     context_queue_fbo_entry_destruction);
 665             break;
 666
 667         default:
 668             break;
 669     }
 670 }
 671
 672 static void context_detach_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 673 {
 674     entry->attached = FALSE;
 675 }
 676
 677 void context_resource_unloaded(const struct wined3d_device *device,
 678         struct wined3d_resource *resource, WINED3DRESOURCETYPE type)
 679 {
 680     switch (type)
 681     {
 682         case WINED3DRTYPE_SURFACE:
 683             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 684                     context_detach_fbo_entry);
 685             break;
 686
 687         default:
 688             break;
 689     }
 690 }
 691
 692 void context_surface_update(struct wined3d_context *context, const struct wined3d_surface *surface)
 693 {
 694     const struct wined3d_gl_info *gl_info = context->gl_info;
 695     struct fbo_entry *entry = context->current_fbo;
 696     unsigned int i;
 697
 698     if (!entry || context->rebind_fbo) return;
 699
 700     for (i = 0; i < gl_info->limits.buffers; ++i)
 701     {
 702         if (surface == entry->render_targets[i])
 703         {
 704             TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
 705             context->rebind_fbo = TRUE;
 706             return;
 707         }
 708     }
 709
 710     if (surface == entry->depth_stencil)
 711     {
 712         TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
 713         context->rebind_fbo = TRUE;
 714     }
 715 }
 716
 717 static BOOL context_set_pixel_format(const struct wined3d_gl_info *gl_info, HDC dc, int format)
 718 {
 719     int current = GetPixelFormat(dc);
 720
 721     if (current == format) return TRUE;
 722
 723     if (!current)
 724     {
 725         if (!SetPixelFormat(dc, format, NULL))
 726         {
 727             /* This may also happen if the dc belongs to a destroyed window. */
 728             WARN("Failed to set pixel format %d on device context %p, last error %#x.\n",
 729                     format, dc, GetLastError());
 730             return FALSE;
 731         }
 732         return TRUE;
 733     }
 734
 735     /* By default WGL doesn't allow pixel format adjustments but we need it
 736      * here. For this reason there's a Wine specific wglSetPixelFormat()
 737      * which allows us to set the pixel format multiple times. Only use it
 738      * when really needed. */
 739     if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 740     {
 741         if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format, NULL)))
 742         {
 743             ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
 744                     format, dc);
 745             return FALSE;
 746         }
 747         return TRUE;
 748     }
 749
 750     /* OpenGL doesn't allow pixel format adjustments. Print an error and
 751      * continue using the old format. There's a big chance that the old
 752      * format works although with a performance hit and perhaps rendering
 753      * errors. */
 754     ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
 755             format, dc, current);
 756     return TRUE;
 757 }
 758
 759 static BOOL context_set_gl_context(struct wined3d_context *ctx)
 760 {
 761     struct wined3d_swapchain *swapchain = ctx->swapchain;
 762     BOOL backup = FALSE;
 763
 764     if (!context_set_pixel_format(ctx->gl_info, ctx->hdc, ctx->pixel_format))
 765     {
 766         WARN("Failed to set pixel format %d on device context %p.\n",
 767                 ctx->pixel_format, ctx->hdc);
 768         backup = TRUE;
 769     }
 770
 771     if (backup || !pwglMakeCurrent(ctx->hdc, ctx->glCtx))
 772     {
 773         HDC dc;
 774
 775         WARN("Failed to make GL context %p current on device context %p, last error %#x.\n",
 776                 ctx->glCtx, ctx->hdc, GetLastError());
 777         ctx->valid = 0;
 778         WARN("Trying fallback to the backup window.\n");
 779
 780         /* FIXME: If the context is destroyed it's no longer associated with
 781          * a swapchain, so we can't use the swapchain to get a backup dc. To
 782          * make this work windowless contexts would need to be handled by the
 783          * device. */
 784         if (ctx->destroyed)
 785         {
 786             FIXME("Unable to get backup dc for destroyed context %p.\n", ctx);
 787             context_set_current(NULL);
 788             return FALSE;
 789         }
 790
 791         if (!(dc = swapchain_get_backup_dc(swapchain)))
 792         {
 793             context_set_current(NULL);
 794             return FALSE;
 795         }
 796
 797         if (!context_set_pixel_format(ctx->gl_info, dc, ctx->pixel_format))
 798         {
 799             ERR("Failed to set pixel format %d on device context %p.\n",
 800                     ctx->pixel_format, dc);
 801             context_set_current(NULL);
 802             return FALSE;
 803         }
 804
 805         if (!pwglMakeCurrent(dc, ctx->glCtx))
 806         {
 807             ERR("Fallback to backup window (dc %p) failed too, last error %#x.\n",
 808                     dc, GetLastError());
 809             context_set_current(NULL);
 810             return FALSE;
 811         }
 812     }
 813     return TRUE;
 814 }
 815
 816 static void context_restore_gl_context(const struct wined3d_gl_info *gl_info, HDC dc, HGLRC gl_ctx, int pf)
 817 {
 818     if (!context_set_pixel_format(gl_info, dc, pf))
 819     {
 820         ERR("Failed to restore pixel format %d on device context %p.\n", pf, dc);
 821         context_set_current(NULL);
 822         return;
 823     }
 824
 825     if (!pwglMakeCurrent(dc, gl_ctx))
 826     {
 827         ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 828                 gl_ctx, dc, GetLastError());
 829         context_set_current(NULL);
 830     }
 831 }
 832
 833 static void context_update_window(struct wined3d_context *context)
 834 {
 835     if (context->win_handle == context->swapchain->win_handle)
 836         return;
 837
 838     TRACE("Updating context %p window from %p to %p.\n",
 839             context, context->win_handle, context->swapchain->win_handle);
 840
 841     if (context->valid)
 842     {
 843         /* You'd figure ReleaseDC() would fail if the DC doesn't match the
 844          * window. However, that's not what actually happens, and there are
 845          * user32 tests that confirm ReleaseDC() with the wrong window is
 846          * supposed to succeed. So explicitly check that the DC belongs to
 847          * the window, since we want to avoid releasing a DC that belongs to
 848          * some other window if the original window was already destroyed. */
 849         if (WindowFromDC(context->hdc) != context->win_handle)
 850         {
 851             WARN("DC %p does not belong to window %p.\n",
 852                     context->hdc, context->win_handle);
 853         }
 854         else if (!ReleaseDC(context->win_handle, context->hdc))
 855         {
 856             ERR("Failed to release device context %p, last error %#x.\n",
 857                     context->hdc, GetLastError());
 858         }
 859     }
 860     else context->valid = 1;
 861
 862     context->win_handle = context->swapchain->win_handle;
 863
 864     if (!(context->hdc = GetDC(context->win_handle)))
 865     {
 866         ERR("Failed to get a device context for window %p.\n", context->win_handle);
 867         goto err;
 868     }
 869
 870     if (!context_set_pixel_format(context->gl_info, context->hdc, context->pixel_format))
 871     {
 872         ERR("Failed to set pixel format %d on device context %p.\n",
 873                 context->pixel_format, context->hdc);
 874         goto err;
 875     }
 876
 877     context_set_gl_context(context);
 878
 879     return;
 880
 881 err:
 882     context->valid = 0;
 883 }
 884
 885 /* Do not call while under the GL lock. */
 886 static void context_destroy_gl_resources(struct wined3d_context *context)
 887 {
 888     const struct wined3d_gl_info *gl_info = context->gl_info;
 889     struct wined3d_occlusion_query *occlusion_query;
 890     struct wined3d_event_query *event_query;
 891     struct fbo_entry *entry, *entry2;
 892     HGLRC restore_ctx;
 893     HDC restore_dc;
 894     unsigned int i;
 895     int restore_pf;
 896
 897     restore_ctx = pwglGetCurrentContext();
 898     restore_dc = pwglGetCurrentDC();
 899     restore_pf = GetPixelFormat(restore_dc);
 900
 901     if (context->valid && restore_ctx != context->glCtx)
 902         context_set_gl_context(context);
 903     else restore_ctx = NULL;
 904
 905     ENTER_GL();
 906
 907     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
 908     {
 909         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
 910             GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
 911         occlusion_query->context = NULL;
 912     }
 913
 914     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
 915     {
 916         if (context->valid)
 917         {
 918             if (gl_info->supported[ARB_SYNC])
 919             {
 920                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 921             }
 922             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
 923             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
 924         }
 925         event_query->context = NULL;
 926     }
 927
 928     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 929     {
 930         if (!context->valid) entry->id = 0;
 931         context_destroy_fbo_entry(context, entry);
 932     }
 933
 934     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 935     {
 936         if (!context->valid) entry->id = 0;
 937         context_destroy_fbo_entry(context, entry);
 938     }
 939
 940     if (context->valid)
 941     {
 942         if (context->dummy_arbfp_prog)
 943         {
 944             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
 945         }
 946
 947         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 948             GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
 949
 950         if (gl_info->supported[ARB_SYNC])
 951         {
 952             for (i = 0; i < context->free_event_query_count; ++i)
 953             {
 954                 GL_EXTCALL(glDeleteSync(context->free_event_queries[i].sync));
 955             }
 956         }
 957         else if (gl_info->supported[APPLE_FENCE])
 958         {
 959             for (i = 0; i < context->free_event_query_count; ++i)
 960             {
 961                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
 962             }
 963         }
 964         else if (gl_info->supported[NV_FENCE])
 965         {
 966             for (i = 0; i < context->free_event_query_count; ++i)
 967             {
 968                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
 969             }
 970         }
 971
 972         checkGLcall("context cleanup");
 973     }
 974
 975     LEAVE_GL();
 976
 977     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
 978     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
 979
 980     if (restore_ctx)
 981     {
 982         context_restore_gl_context(gl_info, restore_dc, restore_ctx, restore_pf);
 983     }
 984     else if (pwglGetCurrentContext() && !pwglMakeCurrent(NULL, NULL))
 985     {
 986         ERR("Failed to disable GL context.\n");
 987     }
 988
 989     ReleaseDC(context->win_handle, context->hdc);
 990
 991     if (!pwglDeleteContext(context->glCtx))
 992     {
 993         DWORD err = GetLastError();
 994         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
 995     }
 996 }
 997
 998 DWORD context_get_tls_idx(void)
 999 {
1000     return wined3d_context_tls_idx;
1001 }
1002
1003 void context_set_tls_idx(DWORD idx)
1004 {
1005     wined3d_context_tls_idx = idx;
1006 }
1007
1008 struct wined3d_context *context_get_current(void)
1009 {
1010     return TlsGetValue(wined3d_context_tls_idx);
1011 }
1012
1013 /* Do not call while under the GL lock. */
1014 BOOL context_set_current(struct wined3d_context *ctx)
1015 {
1016     struct wined3d_context *old = context_get_current();
1017
1018     if (old == ctx)
1019     {
1020         TRACE("Already using D3D context %p.\n", ctx);
1021         return TRUE;
1022     }
1023
1024     if (old)
1025     {
1026         if (old->destroyed)
1027         {
1028             TRACE("Switching away from destroyed context %p.\n", old);
1029             context_destroy_gl_resources(old);
1030             HeapFree(GetProcessHeap(), 0, old);
1031         }
1032         else
1033         {
1034             old->current = 0;
1035         }
1036     }
1037
1038     if (ctx)
1039     {
1040         if (!ctx->valid)
1041         {
1042             ERR("Trying to make invalid context %p current\n", ctx);
1043             return FALSE;
1044         }
1045
1046         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1047         if (!context_set_gl_context(ctx))
1048             return FALSE;
1049         ctx->current = 1;
1050     }
1051     else if(pwglGetCurrentContext())
1052     {
1053         TRACE("Clearing current D3D context.\n");
1054         if (!pwglMakeCurrent(NULL, NULL))
1055         {
1056             DWORD err = GetLastError();
1057             ERR("Failed to clear current GL context, last error %#x.\n", err);
1058             TlsSetValue(wined3d_context_tls_idx, NULL);
1059             return FALSE;
1060         }
1061     }
1062
1063     return TlsSetValue(wined3d_context_tls_idx, ctx);
1064 }
1065
1066 void context_release(struct wined3d_context *context)
1067 {
1068     TRACE("Releasing context %p, level %u.\n", context, context->level);
1069
1070     if (WARN_ON(d3d))
1071     {
1072         if (!context->level)
1073             WARN("Context %p is not active.\n", context);
1074         else if (context != context_get_current())
1075             WARN("Context %p is not the current context.\n", context);
1076     }
1077
1078     if (!--context->level && context->restore_ctx)
1079     {
1080         TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1081         context_restore_gl_context(context->gl_info, context->restore_dc, context->restore_ctx, context->restore_pf);
1082         context->restore_ctx = NULL;
1083         context->restore_dc = NULL;
1084     }
1085 }
1086
1087 static void context_enter(struct wined3d_context *context)
1088 {
1089     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1090
1091     if (!context->level++)
1092     {
1093         const struct wined3d_context *current_context = context_get_current();
1094         HGLRC current_gl = pwglGetCurrentContext();
1095
1096         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1097         {
1098             TRACE("Another GL context (%p on device context %p) is already current.\n",
1099                     current_gl, pwglGetCurrentDC());
1100             context->restore_ctx = current_gl;
1101             context->restore_dc = pwglGetCurrentDC();
1102             context->restore_pf = GetPixelFormat(context->restore_dc);
1103         }
1104     }
1105 }
1106
1107 void context_invalidate_state(struct wined3d_context *context, DWORD state)
1108 {
1109     DWORD rep = context->state_table[state].representative;
1110     DWORD idx;
1111     BYTE shift;
1112
1113     if (isStateDirty(context, rep)) return;
1114
1115     context->dirtyArray[context->numDirtyEntries++] = rep;
1116     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1117     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1118     context->isStateDirty[idx] |= (1 << shift);
1119 }
1120
1121 /* This function takes care of wined3d pixel format selection. */
1122 static int context_choose_pixel_format(const struct wined3d_device *device, HDC hdc,
1123         const struct wined3d_format *color_format, const struct wined3d_format *ds_format,
1124         BOOL auxBuffers, BOOL findCompatible)
1125 {
1126     int iPixelFormat=0;
1127     BYTE redBits, greenBits, blueBits, alphaBits, colorBits;
1128     BYTE depthBits=0, stencilBits=0;
1129     unsigned int current_value;
1130     unsigned int cfg_count = device->adapter->cfg_count;
1131     unsigned int i;
1132
1133     TRACE("device %p, dc %p, color_format %s, ds_format %s, aux_buffers %#x, find_compatible %#x.\n",
1134             device, hdc, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id),
1135             auxBuffers, findCompatible);
1136
1137     if (!getColorBits(color_format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1138     {
1139         ERR("Unable to get color bits for format %s (%#x)!\n",
1140                 debug_d3dformat(color_format->id), color_format->id);
1141         return 0;
1142     }
1143
1144     getDepthStencilBits(ds_format, &depthBits, &stencilBits);
1145
1146     current_value = 0;
1147     for (i = 0; i < cfg_count; ++i)
1148     {
1149         const struct wined3d_pixel_format *cfg = &device->adapter->cfgs[i];
1150         unsigned int value;
1151
1152         /* For now only accept RGBA formats. Perhaps some day we will
1153          * allow floating point formats for pbuffers. */
1154         if (cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1155             continue;
1156         /* In window mode we need a window drawable format and double buffering. */
1157         if (!(cfg->windowDrawable && cfg->doubleBuffer))
1158             continue;
1159         if (cfg->redSize < redBits)
1160             continue;
1161         if (cfg->greenSize < greenBits)
1162             continue;
1163         if (cfg->blueSize < blueBits)
1164             continue;
1165         if (cfg->alphaSize < alphaBits)
1166             continue;
1167         if (cfg->depthSize < depthBits)
1168             continue;
1169         if (stencilBits && cfg->stencilSize != stencilBits)
1170             continue;
1171         /* Check multisampling support. */
1172         if (cfg->numSamples)
1173             continue;
1174
1175         value = 1;
1176         /* We try to locate a format which matches our requirements exactly. In case of
1177          * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1178         if (cfg->depthSize == depthBits)
1179             value += 1;
1180         if (cfg->stencilSize == stencilBits)
1181             value += 2;
1182         if (cfg->alphaSize == alphaBits)
1183             value += 4;
1184         /* We like to have aux buffers in backbuffer mode */
1185         if (auxBuffers && cfg->auxBuffers)
1186             value += 8;
1187         if (cfg->redSize == redBits
1188                 && cfg->greenSize == greenBits
1189                 && cfg->blueSize == blueBits)
1190             value += 16;
1191
1192         if (value > current_value)
1193         {
1194             iPixelFormat = cfg->iPixelFormat;
1195             current_value = value;
1196         }
1197     }
1198
1199     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1200     if(!iPixelFormat && !findCompatible) {
1201         ERR("Can't find a suitable iPixelFormat\n");
1202         return FALSE;
1203     } else if(!iPixelFormat) {
1204         PIXELFORMATDESCRIPTOR pfd;
1205
1206         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1207         /* PixelFormat selection */
1208         ZeroMemory(&pfd, sizeof(pfd));
1209         pfd.nSize      = sizeof(pfd);
1210         pfd.nVersion   = 1;
1211         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1212         pfd.iPixelType = PFD_TYPE_RGBA;
1213         pfd.cAlphaBits = alphaBits;
1214         pfd.cColorBits = colorBits;
1215         pfd.cDepthBits = depthBits;
1216         pfd.cStencilBits = stencilBits;
1217         pfd.iLayerType = PFD_MAIN_PLANE;
1218
1219         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1220         if(!iPixelFormat) {
1221             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1222             ERR("Can't find a suitable iPixelFormat\n");
1223             return FALSE;
1224         }
1225     }
1226
1227     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1228             iPixelFormat, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id));
1229     return iPixelFormat;
1230 }
1231
1232 /* GL locking is done by the caller */
1233 static void bind_dummy_textures(const struct wined3d_device *device, const struct wined3d_context *context)
1234 {
1235     const struct wined3d_gl_info *gl_info = context->gl_info;
1236     unsigned int i, count = min(MAX_COMBINED_SAMPLERS, gl_info->limits.combined_samplers);
1237
1238     for (i = 0; i < count; ++i)
1239     {
1240         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1241         checkGLcall("glActiveTextureARB");
1242
1243         glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[i]);
1244         checkGLcall("glBindTexture");
1245
1246         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1247         {
1248             glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[i]);
1249             checkGLcall("glBindTexture");
1250         }
1251
1252         if (gl_info->supported[EXT_TEXTURE3D])
1253         {
1254             glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[i]);
1255             checkGLcall("glBindTexture");
1256         }
1257
1258         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1259         {
1260             glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[i]);
1261             checkGLcall("glBindTexture");
1262         }
1263     }
1264 }
1265
1266 /* Do not call while under the GL lock. */
1267 struct wined3d_context *context_create(struct wined3d_swapchain *swapchain,
1268         struct wined3d_surface *target, const struct wined3d_format *ds_format)
1269 {
1270     struct wined3d_device *device = swapchain->device;
1271     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1272     const struct wined3d_format *color_format;
1273     struct wined3d_context *ret;
1274     BOOL auxBuffers = FALSE;
1275     int pixel_format;
1276     unsigned int s;
1277     int swap_interval;
1278     DWORD state;
1279     HGLRC ctx;
1280     HDC hdc;
1281
1282     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1283
1284     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1285     if (!ret)
1286     {
1287         ERR("Failed to allocate context memory.\n");
1288         return NULL;
1289     }
1290
1291     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1292             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1293     if (!ret->blit_targets)
1294         goto out;
1295
1296     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1297             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1298     if (!ret->draw_buffers)
1299         goto out;
1300
1301     ret->free_occlusion_query_size = 4;
1302     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1303             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1304     if (!ret->free_occlusion_queries)
1305         goto out;
1306
1307     list_init(&ret->occlusion_queries);
1308
1309     ret->free_event_query_size = 4;
1310     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1311             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1312     if (!ret->free_event_queries)
1313         goto out;
1314
1315     list_init(&ret->event_queries);
1316     list_init(&ret->fbo_list);
1317     list_init(&ret->fbo_destroy_list);
1318
1319     if (!(hdc = GetDC(swapchain->win_handle)))
1320     {
1321         WARN("Failed to retireve device context, trying swapchain backup.\n");
1322
1323         if (!(hdc = swapchain_get_backup_dc(swapchain)))
1324         {
1325             ERR("Failed to retrieve a device context.\n");
1326             goto out;
1327         }
1328     }
1329
1330     color_format = target->resource.format;
1331
1332     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1333      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1334     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1335     {
1336         auxBuffers = TRUE;
1337
1338         if (color_format->id == WINED3DFMT_B4G4R4X4_UNORM)
1339             color_format = wined3d_get_format(gl_info, WINED3DFMT_B4G4R4A4_UNORM);
1340         else if (color_format->id == WINED3DFMT_B8G8R8X8_UNORM)
1341             color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1342     }
1343
1344     /* DirectDraw supports 8bit paletted render targets and these are used by
1345      * old games like StarCraft and C&C. Most modern hardware doesn't support
1346      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1347      * conversion (ab)uses the alpha component for storing the palette index.
1348      * For this reason we require a format with 8bit alpha, so request
1349      * A8R8G8B8. */
1350     if (color_format->id == WINED3DFMT_P8_UINT)
1351         color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1352
1353     /* Try to find a pixel format which matches our requirements. */
1354     pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, FALSE);
1355
1356     /* Try to locate a compatible format if we weren't able to find anything. */
1357     if (!pixel_format)
1358     {
1359         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1360         pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, TRUE);
1361     }
1362
1363     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1364     if (!pixel_format)
1365     {
1366         ERR("Can't find a suitable pixel format.\n");
1367         goto out;
1368     }
1369
1370     context_enter(ret);
1371
1372     if (!context_set_pixel_format(gl_info, hdc, pixel_format))
1373     {
1374         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1375         context_release(ret);
1376         goto out;
1377     }
1378
1379     if (!(ctx = pwglCreateContext(hdc)))
1380     {
1381         ERR("Failed to create a WGL context.\n");
1382         context_release(ret);
1383         goto out;
1384     }
1385
1386     if (device->context_count)
1387     {
1388         if (!pwglShareLists(device->contexts[0]->glCtx, ctx))
1389         {
1390             ERR("wglShareLists(%p, %p) failed, last error %#x.\n",
1391                     device->contexts[0]->glCtx, ctx, GetLastError());
1392             context_release(ret);
1393             if (!pwglDeleteContext(ctx))
1394                 ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1395             goto out;
1396         }
1397     }
1398
1399     if (!device_context_add(device, ret))
1400     {
1401         ERR("Failed to add the newly created context to the context list\n");
1402         context_release(ret);
1403         if (!pwglDeleteContext(ctx))
1404             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1405         goto out;
1406     }
1407
1408     ret->gl_info = gl_info;
1409     ret->state_table = device->StateTable;
1410
1411     /* Mark all states dirty to force a proper initialization of the states
1412      * on the first use of the context. */
1413     for (state = 0; state <= STATE_HIGHEST; ++state)
1414     {
1415         if (ret->state_table[state].representative)
1416             context_invalidate_state(ret, state);
1417     }
1418
1419     ret->swapchain = swapchain;
1420     ret->current_rt = target;
1421     ret->tid = GetCurrentThreadId();
1422
1423     ret->render_offscreen = surface_is_offscreen(target);
1424     ret->draw_buffers_mask = context_generate_rt_mask(GL_BACK);
1425     ret->valid = 1;
1426
1427     ret->glCtx = ctx;
1428     ret->win_handle = swapchain->win_handle;
1429     ret->hdc = hdc;
1430     ret->pixel_format = pixel_format;
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         device_context_remove(device, ret);
1437         context_release(ret);
1438         if (!pwglDeleteContext(ctx))
1439             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1440         goto out;
1441     }
1442
1443     switch (swapchain->presentParms.PresentationInterval)
1444     {
1445         case WINED3DPRESENT_INTERVAL_IMMEDIATE:
1446             swap_interval = 0;
1447             break;
1448         case WINED3DPRESENT_INTERVAL_DEFAULT:
1449         case WINED3DPRESENT_INTERVAL_ONE:
1450             swap_interval = 1;
1451             break;
1452         case WINED3DPRESENT_INTERVAL_TWO:
1453             swap_interval = 2;
1454             break;
1455         case WINED3DPRESENT_INTERVAL_THREE:
1456             swap_interval = 3;
1457             break;
1458         case WINED3DPRESENT_INTERVAL_FOUR:
1459             swap_interval = 4;
1460             break;
1461         default:
1462             FIXME("Unknown presentation interval %08x\n", swapchain->presentParms.PresentationInterval);
1463             swap_interval = 1;
1464     }
1465
1466     if (gl_info->supported[WGL_EXT_SWAP_CONTROL])
1467     {
1468         if (!GL_EXTCALL(wglSwapIntervalEXT(swap_interval)))
1469             ERR("wglSwapIntervalEXT failed to set swap interval %d for context %p, last error %#x\n",
1470                 swap_interval, ret, GetLastError());
1471     }
1472
1473     ENTER_GL();
1474
1475     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1476
1477     TRACE("Setting up the screen\n");
1478     /* Clear the screen */
1479     glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
1480     checkGLcall("glClearColor");
1481     glClearIndex(0);
1482     glClearDepth(1);
1483     glClearStencil(0xffff);
1484
1485     checkGLcall("glClear");
1486
1487     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1488     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1489
1490     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1491     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1492
1493     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1494     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1495
1496     glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1497     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1498     glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1499     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1500
1501     if (gl_info->supported[APPLE_CLIENT_STORAGE])
1502     {
1503         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1504          * and textures in DIB sections(due to the memory protection).
1505          */
1506         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1507         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1508     }
1509     if (gl_info->supported[ARB_VERTEX_BLEND])
1510     {
1511         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1512          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1513          * GL_VERTEX_BLEND_ARB isn't enabled too
1514          */
1515         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1516         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1517     }
1518     if (gl_info->supported[NV_TEXTURE_SHADER2])
1519     {
1520         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1521          * the previous texture where to source the offset from is always unit - 1.
1522          */
1523         for (s = 1; s < gl_info->limits.textures; ++s)
1524         {
1525             context_active_texture(ret, gl_info, s);
1526             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1527             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1528         }
1529     }
1530     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1531     {
1532         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1533          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1534          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1535          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1536          * is ever assigned.
1537          *
1538          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1539          * program and the dummy program is destroyed when the context is destroyed.
1540          */
1541         const char *dummy_program =
1542                 "!!ARBfp1.0\n"
1543                 "MOV result.color, fragment.color.primary;\n"
1544                 "END\n";
1545         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1546         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1547         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1548     }
1549
1550     if (gl_info->supported[ARB_POINT_SPRITE])
1551     {
1552         for (s = 0; s < gl_info->limits.textures; ++s)
1553         {
1554             context_active_texture(ret, gl_info, s);
1555             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1556             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1557         }
1558     }
1559
1560     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1561     {
1562         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1563     }
1564     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1565     {
1566         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1567     }
1568     device->frag_pipe->enable_extension(TRUE);
1569
1570     /* If this happens to be the first context for the device, dummy textures
1571      * are not created yet. In that case, they will be created (and bound) by
1572      * create_dummy_textures right after this context is initialized. */
1573     if (device->dummy_texture_2d[0])
1574         bind_dummy_textures(device, ret);
1575
1576     LEAVE_GL();
1577
1578     TRACE("Created context %p.\n", ret);
1579
1580     return ret;
1581
1582 out:
1583     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1584     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1585     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1586     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1587     HeapFree(GetProcessHeap(), 0, ret);
1588     return NULL;
1589 }
1590
1591 /* Do not call while under the GL lock. */
1592 void context_destroy(struct wined3d_device *device, struct wined3d_context *context)
1593 {
1594     BOOL destroy;
1595
1596     TRACE("Destroying ctx %p\n", context);
1597
1598     if (context->tid == GetCurrentThreadId() || !context->current)
1599     {
1600         context_destroy_gl_resources(context);
1601         TlsSetValue(wined3d_context_tls_idx, NULL);
1602         destroy = TRUE;
1603     }
1604     else
1605     {
1606         context->destroyed = 1;
1607         destroy = FALSE;
1608     }
1609
1610     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1611     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1612     device_context_remove(device, context);
1613     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1614 }
1615
1616 /* GL locking is done by the caller */
1617 static void set_blit_dimension(UINT width, UINT height)
1618 {
1619     const GLdouble projection[] =
1620     {
1621         2.0 / width,          0.0,  0.0, 0.0,
1622                 0.0, 2.0 / height,  0.0, 0.0,
1623                 0.0,          0.0,  2.0, 0.0,
1624                -1.0,         -1.0, -1.0, 1.0,
1625     };
1626
1627     glMatrixMode(GL_PROJECTION);
1628     checkGLcall("glMatrixMode(GL_PROJECTION)");
1629     glLoadMatrixd(projection);
1630     checkGLcall("glLoadMatrixd");
1631     glViewport(0, 0, width, height);
1632     checkGLcall("glViewport");
1633 }
1634
1635 /*****************************************************************************
1636  * SetupForBlit
1637  *
1638  * Sets up a context for DirectDraw blitting.
1639  * All texture units are disabled, texture unit 0 is set as current unit
1640  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1641  * color writing enabled for all channels
1642  * register combiners disabled, shaders disabled
1643  * world matrix is set to identity, texture matrix 0 too
1644  * projection matrix is setup for drawing screen coordinates
1645  *
1646  * Params:
1647  *  This: Device to activate the context for
1648  *  context: Context to setup
1649  *
1650  *****************************************************************************/
1651 /* Context activation is done by the caller. */
1652 static void SetupForBlit(const struct wined3d_device *device, struct wined3d_context *context)
1653 {
1654     int i;
1655     const struct wined3d_gl_info *gl_info = context->gl_info;
1656     UINT width = context->current_rt->resource.width;
1657     UINT height = context->current_rt->resource.height;
1658     DWORD sampler;
1659
1660     TRACE("Setting up context %p for blitting\n", context);
1661     if(context->last_was_blit) {
1662         if(context->blit_w != width || context->blit_h != height) {
1663             ENTER_GL();
1664             set_blit_dimension(width, height);
1665             LEAVE_GL();
1666             context->blit_w = width; context->blit_h = height;
1667             /* No need to dirtify here, the states are still dirtified because they weren't
1668              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1669              * be set
1670              */
1671         }
1672         TRACE("Context is already set up for blitting, nothing to do\n");
1673         return;
1674     }
1675     context->last_was_blit = TRUE;
1676
1677     /* TODO: Use a display list */
1678
1679     /* Disable shaders */
1680     ENTER_GL();
1681     device->shader_backend->shader_select(context, FALSE, FALSE);
1682     LEAVE_GL();
1683
1684     context_invalidate_state(context, STATE_VSHADER);
1685     context_invalidate_state(context, STATE_PIXELSHADER);
1686
1687     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1688      * helper functions in between gl calls. This function is full of context_invalidate_state
1689      * which can safely be called from here, we only lock once instead locking/unlocking
1690      * after each GL call.
1691      */
1692     ENTER_GL();
1693
1694     /* Disable all textures. The caller can then bind a texture it wants to blit
1695      * from
1696      *
1697      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1698      * function texture unit. No need to care for higher samplers
1699      */
1700     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1701     {
1702         sampler = device->rev_tex_unit_map[i];
1703         context_active_texture(context, gl_info, i);
1704
1705         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1706         {
1707             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1708             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1709         }
1710         glDisable(GL_TEXTURE_3D);
1711         checkGLcall("glDisable GL_TEXTURE_3D");
1712         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1713         {
1714             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1715             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1716         }
1717         glDisable(GL_TEXTURE_2D);
1718         checkGLcall("glDisable GL_TEXTURE_2D");
1719
1720         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1721         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1722
1723         if (sampler != WINED3D_UNMAPPED_STAGE)
1724         {
1725             if (sampler < MAX_TEXTURES)
1726                 context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP));
1727             context_invalidate_state(context, STATE_SAMPLER(sampler));
1728         }
1729     }
1730     context_active_texture(context, gl_info, 0);
1731
1732     sampler = device->rev_tex_unit_map[0];
1733
1734     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1735     {
1736         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1737         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1738     }
1739     glDisable(GL_TEXTURE_3D);
1740     checkGLcall("glDisable GL_TEXTURE_3D");
1741     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1742     {
1743         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1744         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1745     }
1746     glDisable(GL_TEXTURE_2D);
1747     checkGLcall("glDisable GL_TEXTURE_2D");
1748
1749     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1750
1751     glMatrixMode(GL_TEXTURE);
1752     checkGLcall("glMatrixMode(GL_TEXTURE)");
1753     glLoadIdentity();
1754     checkGLcall("glLoadIdentity()");
1755
1756     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1757     {
1758         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1759                   GL_TEXTURE_LOD_BIAS_EXT,
1760                   0.0f);
1761         checkGLcall("glTexEnvf GL_TEXTURE_LOD_BIAS_EXT ...");
1762     }
1763
1764     if (sampler != WINED3D_UNMAPPED_STAGE)
1765     {
1766         if (sampler < MAX_TEXTURES)
1767         {
1768             context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler));
1769             context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP));
1770         }
1771         context_invalidate_state(context, STATE_SAMPLER(sampler));
1772     }
1773
1774     /* Other misc states */
1775     glDisable(GL_ALPHA_TEST);
1776     checkGLcall("glDisable(GL_ALPHA_TEST)");
1777     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE));
1778     glDisable(GL_LIGHTING);
1779     checkGLcall("glDisable GL_LIGHTING");
1780     context_invalidate_state(context, STATE_RENDER(WINED3DRS_LIGHTING));
1781     glDisable(GL_DEPTH_TEST);
1782     checkGLcall("glDisable GL_DEPTH_TEST");
1783     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ZENABLE));
1784     glDisableWINE(GL_FOG);
1785     checkGLcall("glDisable GL_FOG");
1786     context_invalidate_state(context, STATE_RENDER(WINED3DRS_FOGENABLE));
1787     glDisable(GL_BLEND);
1788     checkGLcall("glDisable GL_BLEND");
1789     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
1790     glDisable(GL_CULL_FACE);
1791     checkGLcall("glDisable GL_CULL_FACE");
1792     context_invalidate_state(context, STATE_RENDER(WINED3DRS_CULLMODE));
1793     glDisable(GL_STENCIL_TEST);
1794     checkGLcall("glDisable GL_STENCIL_TEST");
1795     context_invalidate_state(context, STATE_RENDER(WINED3DRS_STENCILENABLE));
1796     glDisable(GL_SCISSOR_TEST);
1797     checkGLcall("glDisable GL_SCISSOR_TEST");
1798     context_invalidate_state(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
1799     if (gl_info->supported[ARB_POINT_SPRITE])
1800     {
1801         glDisable(GL_POINT_SPRITE_ARB);
1802         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1803         context_invalidate_state(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE));
1804     }
1805     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1806     checkGLcall("glColorMask");
1807     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE));
1808     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE1));
1809     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE2));
1810     context_invalidate_state(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE3));
1811     if (gl_info->supported[EXT_SECONDARY_COLOR])
1812     {
1813         glDisable(GL_COLOR_SUM_EXT);
1814         context_invalidate_state(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
1815         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1816     }
1817
1818     /* Setup transforms */
1819     glMatrixMode(GL_MODELVIEW);
1820     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1821     glLoadIdentity();
1822     checkGLcall("glLoadIdentity()");
1823     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)));
1824
1825     context->last_was_rhw = TRUE;
1826     context_invalidate_state(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
1827
1828     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1829     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1830     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1831     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1832     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1833     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1834     context_invalidate_state(context, STATE_RENDER(WINED3DRS_CLIPPING));
1835
1836     set_blit_dimension(width, height);
1837     device->frag_pipe->enable_extension(FALSE);
1838
1839     LEAVE_GL();
1840
1841     context->blit_w = width; context->blit_h = height;
1842     context_invalidate_state(context, STATE_VIEWPORT);
1843     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
1844 }
1845
1846 static inline BOOL is_rt_mask_onscreen(DWORD rt_mask)
1847 {
1848     return rt_mask & (1 << 31);
1849 }
1850
1851 static inline GLenum draw_buffer_from_rt_mask(DWORD rt_mask)
1852 {
1853     return rt_mask & ~(1 << 31);
1854 }
1855
1856 /* Context activation and GL locking are done by the caller. */
1857 static void context_apply_draw_buffers(struct wined3d_context *context, DWORD rt_mask)
1858 {
1859     if (!rt_mask)
1860     {
1861         glDrawBuffer(GL_NONE);
1862         checkGLcall("glDrawBuffer()");
1863     }
1864     else if (is_rt_mask_onscreen(rt_mask))
1865     {
1866         glDrawBuffer(draw_buffer_from_rt_mask(rt_mask));
1867         checkGLcall("glDrawBuffer()");
1868     }
1869     else
1870     {
1871         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1872         {
1873             const struct wined3d_gl_info *gl_info = context->gl_info;
1874             unsigned int i = 0;
1875
1876             while (rt_mask)
1877             {
1878                 if (rt_mask & 1)
1879                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
1880                 else
1881                     context->draw_buffers[i] = GL_NONE;
1882
1883                 rt_mask >>= 1;
1884                 ++i;
1885             }
1886
1887             if (gl_info->supported[ARB_DRAW_BUFFERS])
1888             {
1889                 GL_EXTCALL(glDrawBuffersARB(i, context->draw_buffers));
1890                 checkGLcall("glDrawBuffers()");
1891             }
1892             else
1893             {
1894                 glDrawBuffer(context->draw_buffers[0]);
1895                 checkGLcall("glDrawBuffer()");
1896             }
1897         }
1898         else
1899         {
1900             ERR("Unexpected draw buffers mask with backbuffer ORM.\n");
1901         }
1902     }
1903 }
1904
1905 /* GL locking is done by the caller. */
1906 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
1907 {
1908     glDrawBuffer(buffer);
1909     checkGLcall("glDrawBuffer()");
1910     if (context->current_fbo)
1911         context->current_fbo->rt_mask = context_generate_rt_mask(buffer);
1912     else
1913         context->draw_buffers_mask = context_generate_rt_mask(buffer);
1914 }
1915
1916 /* GL locking is done by the caller. */
1917 void context_active_texture(struct wined3d_context *context, const struct wined3d_gl_info *gl_info, unsigned int unit)
1918 {
1919     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0 + unit));
1920     checkGLcall("glActiveTextureARB");
1921     context->active_texture = unit;
1922 }
1923
1924 void context_bind_texture(struct wined3d_context *context, GLenum target, GLuint name)
1925 {
1926     DWORD unit = context->active_texture;
1927     DWORD old_texture_type = context->texture_type[unit];
1928
1929     if (name)
1930     {
1931         glBindTexture(target, name);
1932         checkGLcall("glBindTexture");
1933     }
1934     else
1935     {
1936         target = GL_NONE;
1937     }
1938
1939     if (old_texture_type != target)
1940     {
1941         const struct wined3d_device *device = context->swapchain->device;
1942
1943         switch (old_texture_type)
1944         {
1945             case GL_NONE:
1946                 /* nothing to do */
1947                 break;
1948             case GL_TEXTURE_2D:
1949                 glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[unit]);
1950                 checkGLcall("glBindTexture");
1951                 break;
1952             case GL_TEXTURE_RECTANGLE_ARB:
1953                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[unit]);
1954                 checkGLcall("glBindTexture");
1955                 break;
1956             case GL_TEXTURE_CUBE_MAP:
1957                 glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[unit]);
1958                 checkGLcall("glBindTexture");
1959                 break;
1960             case GL_TEXTURE_3D:
1961                 glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[unit]);
1962                 checkGLcall("glBindTexture");
1963                 break;
1964             default:
1965                 ERR("Unexpected texture target %#x\n", old_texture_type);
1966         }
1967
1968         context->texture_type[unit] = target;
1969     }
1970 }
1971
1972 static void context_set_render_offscreen(struct wined3d_context *context, BOOL offscreen)
1973 {
1974     if (context->render_offscreen == offscreen) return;
1975
1976     context_invalidate_state(context, STATE_POINTSPRITECOORDORIGIN);
1977     context_invalidate_state(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
1978     context_invalidate_state(context, STATE_VIEWPORT);
1979     context_invalidate_state(context, STATE_SCISSORRECT);
1980     context_invalidate_state(context, STATE_FRONTFACE);
1981     context->render_offscreen = offscreen;
1982 }
1983
1984 static BOOL match_depth_stencil_format(const struct wined3d_format *existing,
1985         const struct wined3d_format *required)
1986 {
1987     BYTE existing_depth, existing_stencil, required_depth, required_stencil;
1988
1989     if (existing == required) return TRUE;
1990     if ((existing->flags & WINED3DFMT_FLAG_FLOAT) != (required->flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
1991
1992     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
1993     getDepthStencilBits(required, &required_depth, &required_stencil);
1994
1995     if(existing_depth < required_depth) return FALSE;
1996     /* If stencil bits are used the exact amount is required - otherwise wrapping
1997      * won't work correctly */
1998     if(required_stencil && required_stencil != existing_stencil) return FALSE;
1999     return TRUE;
2000 }
2001
2002 /* The caller provides a context */
2003 static void context_validate_onscreen_formats(struct wined3d_context *context,
2004         const struct wined3d_surface *depth_stencil)
2005 {
2006     /* Onscreen surfaces are always in a swapchain */
2007     struct wined3d_swapchain *swapchain = context->current_rt->container.u.swapchain;
2008
2009     if (context->render_offscreen || !depth_stencil) return;
2010     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format)) return;
2011
2012     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2013      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2014      * format. */
2015     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2016
2017     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2018     surface_load_location(context->current_rt, SFLAG_INTEXTURE, NULL);
2019     swapchain->render_to_fbo = TRUE;
2020     swapchain_update_draw_bindings(swapchain);
2021     context_set_render_offscreen(context, TRUE);
2022 }
2023
2024 static DWORD context_generate_rt_mask_no_fbo(const struct wined3d_device *device, const struct wined3d_surface *rt)
2025 {
2026     if (!rt || rt->resource.format->id == WINED3DFMT_NULL)
2027         return 0;
2028     else if (rt->container.type == WINED3D_CONTAINER_SWAPCHAIN)
2029         return context_generate_rt_mask_from_surface(rt);
2030     else
2031         return context_generate_rt_mask(device->offscreenBuffer);
2032 }
2033
2034 /* Context activation is done by the caller. */
2035 void context_apply_blit_state(struct wined3d_context *context, const struct wined3d_device *device)
2036 {
2037     struct wined3d_surface *rt = context->current_rt;
2038     DWORD rt_mask, old_mask;
2039
2040     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2041     {
2042         context_validate_onscreen_formats(context, NULL);
2043
2044         if (context->render_offscreen)
2045         {
2046             surface_internal_preload(rt, SRGB_RGB);
2047
2048             ENTER_GL();
2049             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, rt, NULL, rt->draw_binding);
2050             LEAVE_GL();
2051             if (rt->resource.format->id != WINED3DFMT_NULL)
2052                 rt_mask = 1;
2053             else
2054                 rt_mask = 0;
2055         }
2056         else
2057         {
2058             ENTER_GL();
2059             context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
2060             LEAVE_GL();
2061             rt_mask = context_generate_rt_mask_from_surface(rt);
2062         }
2063     }
2064     else
2065     {
2066         rt_mask = context_generate_rt_mask_no_fbo(device, rt);
2067     }
2068
2069     old_mask = context->current_fbo ? context->current_fbo->rt_mask : context->draw_buffers_mask;
2070
2071     ENTER_GL();
2072     if (rt_mask != old_mask)
2073     {
2074         context_apply_draw_buffers(context, rt_mask);
2075         context->draw_buffers_mask = rt_mask;
2076     }
2077
2078     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2079     {
2080         context_check_fbo_status(context, GL_FRAMEBUFFER);
2081     }
2082     LEAVE_GL();
2083
2084     SetupForBlit(device, context);
2085     context_invalidate_state(context, STATE_FRAMEBUFFER);
2086 }
2087
2088 static BOOL context_validate_rt_config(UINT rt_count,
2089         struct wined3d_surface * const *rts, const struct wined3d_surface *ds)
2090 {
2091     unsigned int i;
2092
2093     if (ds) return TRUE;
2094
2095     for (i = 0; i < rt_count; ++i)
2096     {
2097         if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2098             return TRUE;
2099     }
2100
2101     WARN("Invalid render target config, need at least one attachment.\n");
2102     return FALSE;
2103 }
2104
2105 /* Context activation is done by the caller. */
2106 BOOL context_apply_clear_state(struct wined3d_context *context, const struct wined3d_device *device,
2107         UINT rt_count, const struct wined3d_fb_state *fb)
2108 {
2109     DWORD rt_mask = 0, old_mask;
2110     UINT i;
2111     struct wined3d_surface **rts = fb->render_targets;
2112
2113     if (isStateDirty(context, STATE_FRAMEBUFFER) || fb != &device->fb
2114             || rt_count != context->gl_info->limits.buffers)
2115     {
2116         if (!context_validate_rt_config(rt_count, rts, fb->depth_stencil))
2117             return FALSE;
2118
2119         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2120         {
2121             context_validate_onscreen_formats(context, fb->depth_stencil);
2122
2123             ENTER_GL();
2124
2125             if (!rt_count || surface_is_offscreen(rts[0]))
2126             {
2127                 for (i = 0; i < rt_count; ++i)
2128                 {
2129                     context->blit_targets[i] = rts[i];
2130                     if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2131                         rt_mask |= (1 << i);
2132                 }
2133                 while (i < context->gl_info->limits.buffers)
2134                 {
2135                     context->blit_targets[i] = NULL;
2136                     ++i;
2137                 }
2138                 context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets, fb->depth_stencil,
2139                         rt_count ? rts[0]->draw_binding : SFLAG_INTEXTURE);
2140                 glReadBuffer(GL_NONE);
2141                 checkGLcall("glReadBuffer");
2142             }
2143             else
2144             {
2145                 context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2146                 rt_mask = context_generate_rt_mask_from_surface(rts[0]);
2147             }
2148
2149             LEAVE_GL();
2150
2151             /* If the framebuffer is not the device's fb the device's fb has to be reapplied
2152              * next draw. Otherwise we could mark the framebuffer state clean here, once the
2153              * state management allows this */
2154             context_invalidate_state(context, STATE_FRAMEBUFFER);
2155         }
2156         else
2157         {
2158             rt_mask = context_generate_rt_mask_no_fbo(device, rt_count ? rts[0] : NULL);
2159         }
2160     }
2161     else if (wined3d_settings.offscreen_rendering_mode == ORM_FBO
2162             && (!rt_count || surface_is_offscreen(rts[0])))
2163     {
2164         for (i = 0; i < rt_count; ++i)
2165         {
2166             if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL) rt_mask |= (1 << i);
2167         }
2168     }
2169     else
2170     {
2171         rt_mask = context_generate_rt_mask_no_fbo(device, rt_count ? rts[0] : NULL);
2172     }
2173
2174     old_mask = context->current_fbo ? context->current_fbo->rt_mask : context->draw_buffers_mask;
2175
2176     ENTER_GL();
2177     if (rt_mask != old_mask)
2178     {
2179         context_apply_draw_buffers(context, rt_mask);
2180         context->draw_buffers_mask = rt_mask;
2181         context_invalidate_state(context, STATE_FRAMEBUFFER);
2182     }
2183
2184     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2185     {
2186         context_check_fbo_status(context, GL_FRAMEBUFFER);
2187     }
2188
2189     if (context->last_was_blit)
2190     {
2191         device->frag_pipe->enable_extension(TRUE);
2192         context->last_was_blit = FALSE;
2193     }
2194
2195     /* Blending and clearing should be orthogonal, but tests on the nvidia
2196      * driver show that disabling blending when clearing improves the clearing
2197      * performance incredibly. */
2198     glDisable(GL_BLEND);
2199     glEnable(GL_SCISSOR_TEST);
2200     checkGLcall("glEnable GL_SCISSOR_TEST");
2201     LEAVE_GL();
2202
2203     context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
2204     context_invalidate_state(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
2205     context_invalidate_state(context, STATE_SCISSORRECT);
2206
2207     return TRUE;
2208 }
2209
2210 static DWORD find_draw_buffers_mask(const struct wined3d_context *context, const struct wined3d_device *device)
2211 {
2212     const struct wined3d_state *state = &device->stateBlock->state;
2213     struct wined3d_surface **rts = state->fb->render_targets;
2214     struct wined3d_shader *ps = state->pixel_shader;
2215     DWORD rt_mask, rt_mask_bits;
2216     unsigned int i;
2217
2218     if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) return context_generate_rt_mask_no_fbo(device, rts[0]);
2219     else if (!context->render_offscreen) return context_generate_rt_mask_from_surface(rts[0]);
2220
2221     rt_mask = ps ? ps->reg_maps.rt_mask : 1;
2222     rt_mask &= device->valid_rt_mask;
2223     rt_mask_bits = rt_mask;
2224     i = 0;
2225     while (rt_mask_bits)
2226     {
2227         rt_mask_bits &= ~(1 << i);
2228         if (!rts[i] || rts[i]->resource.format->id == WINED3DFMT_NULL)
2229             rt_mask &= ~(1 << i);
2230
2231         i++;
2232     }
2233
2234     return rt_mask;
2235 }
2236
2237 /* GL locking and context activation are done by the caller */
2238 void context_state_fb(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2239 {
2240     const struct wined3d_device *device = context->swapchain->device;
2241     const struct wined3d_fb_state *fb = state->fb;
2242     DWORD rt_mask = find_draw_buffers_mask(context, device);
2243     DWORD old_mask;
2244
2245     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2246     {
2247         if (!context->render_offscreen)
2248         {
2249             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2250         }
2251         else
2252         {
2253             context_apply_fbo_state(context, GL_FRAMEBUFFER, fb->render_targets, fb->depth_stencil,
2254                     fb->render_targets[0]->draw_binding);
2255             glReadBuffer(GL_NONE);
2256             checkGLcall("glReadBuffer");
2257         }
2258     }
2259
2260     old_mask = context->current_fbo ? context->current_fbo->rt_mask : context->draw_buffers_mask;
2261     if (rt_mask != old_mask)
2262     {
2263         context_apply_draw_buffers(context, rt_mask);
2264         context->draw_buffers_mask = rt_mask;
2265     }
2266 }
2267
2268 /* GL locking and context activation are done by the caller */
2269 void context_state_drawbuf(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2270 {
2271     const struct wined3d_device *device = context->swapchain->device;
2272     DWORD rt_mask, old_mask;
2273
2274     if (isStateDirty(context, STATE_FRAMEBUFFER)) return;
2275
2276     old_mask = context->current_fbo ? context->current_fbo->rt_mask : context->draw_buffers_mask;
2277     rt_mask = find_draw_buffers_mask(context, device);
2278     if (rt_mask != old_mask)
2279     {
2280         context_apply_draw_buffers(context, rt_mask);
2281         context->draw_buffers_mask = rt_mask;
2282     }
2283 }
2284
2285 /* Context activation is done by the caller. */
2286 BOOL context_apply_draw_state(struct wined3d_context *context, struct wined3d_device *device)
2287 {
2288     const struct wined3d_state *state = &device->stateBlock->state;
2289     const struct StateEntry *state_table = context->state_table;
2290     const struct wined3d_fb_state *fb = state->fb;
2291     unsigned int i;
2292
2293     if (!context_validate_rt_config(context->gl_info->limits.buffers,
2294             fb->render_targets, fb->depth_stencil))
2295         return FALSE;
2296
2297     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO && isStateDirty(context, STATE_FRAMEBUFFER))
2298     {
2299         context_validate_onscreen_formats(context, fb->depth_stencil);
2300     }
2301
2302     /* Preload resources before FBO setup. Texture preload in particular may
2303      * result in changes to the current FBO, due to using e.g. FBO blits for
2304      * updating a resource location. */
2305     device_update_tex_unit_map(device);
2306     device_preload_textures(device);
2307     if (isStateDirty(context, STATE_VDECL) || isStateDirty(context, STATE_STREAMSRC))
2308         device_update_stream_info(device, context->gl_info);
2309
2310     ENTER_GL();
2311     if (context->last_was_blit)
2312     {
2313         device->frag_pipe->enable_extension(TRUE);
2314     }
2315
2316     for (i = 0; i < context->numDirtyEntries; ++i)
2317     {
2318         DWORD rep = context->dirtyArray[i];
2319         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
2320         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
2321         context->isStateDirty[idx] &= ~(1 << shift);
2322         state_table[rep].apply(context, state, rep);
2323     }
2324
2325     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2326     {
2327         context_check_fbo_status(context, GL_FRAMEBUFFER);
2328     }
2329
2330     LEAVE_GL();
2331     context->numDirtyEntries = 0; /* This makes the whole list clean */
2332     context->last_was_blit = FALSE;
2333
2334     return TRUE;
2335 }
2336
2337 static void context_setup_target(struct wined3d_context *context, struct wined3d_surface *target)
2338 {
2339     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2340
2341     render_offscreen = surface_is_offscreen(target);
2342     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
2343
2344     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2345      * the alpha blend state changes with different render target formats. */
2346     if (!context->current_rt)
2347     {
2348         context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
2349     }
2350     else
2351     {
2352         const struct wined3d_format *old = context->current_rt->resource.format;
2353         const struct wined3d_format *new = target->resource.format;
2354
2355         if (old->id != new->id)
2356         {
2357             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2358             if ((old->alpha_mask && !new->alpha_mask) || (!old->alpha_mask && new->alpha_mask)
2359                     || !(new->flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2360                 context_invalidate_state(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
2361
2362             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
2363             if ((old->flags & WINED3DFMT_FLAG_SRGB_WRITE) != (new->flags & WINED3DFMT_FLAG_SRGB_WRITE))
2364                 context_invalidate_state(context, STATE_RENDER(WINED3DRS_SRGBWRITEENABLE));
2365         }
2366
2367         /* When switching away from an offscreen render target, and we're not
2368          * using FBOs, we have to read the drawable into the texture. This is
2369          * done via PreLoad (and SFLAG_INDRAWABLE set on the surface). There
2370          * are some things that need care though. PreLoad needs a GL context,
2371          * and FindContext is called before the context is activated. It also
2372          * has to be called with the old rendertarget active, otherwise a
2373          * wrong drawable is read. */
2374         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2375                 && old_render_offscreen && context->current_rt != target)
2376         {
2377             /* Read the back buffer of the old drawable into the destination texture. */
2378             if (context->current_rt->texture_name_srgb)
2379                 surface_internal_preload(context->current_rt, SRGB_SRGB);
2380             surface_internal_preload(context->current_rt, SRGB_RGB);
2381             surface_modify_location(context->current_rt, SFLAG_INDRAWABLE, FALSE);
2382         }
2383     }
2384
2385     context->current_rt = target;
2386     context_set_render_offscreen(context, render_offscreen);
2387 }
2388
2389 /* Do not call while under the GL lock. */
2390 struct wined3d_context *context_acquire(const struct wined3d_device *device, struct wined3d_surface *target)
2391 {
2392     struct wined3d_context *current_context = context_get_current();
2393     struct wined3d_context *context;
2394
2395     TRACE("device %p, target %p.\n", device, target);
2396
2397     if (current_context && current_context->destroyed)
2398         current_context = NULL;
2399
2400     if (!target)
2401     {
2402         if (current_context
2403                 && current_context->current_rt
2404                 && current_context->swapchain->device == device)
2405         {
2406             target = current_context->current_rt;
2407         }
2408         else
2409         {
2410             struct wined3d_swapchain *swapchain = device->swapchains[0];
2411             if (swapchain->back_buffers)
2412                 target = swapchain->back_buffers[0];
2413             else
2414                 target = swapchain->front_buffer;
2415         }
2416     }
2417
2418     if (current_context && current_context->current_rt == target)
2419     {
2420         context = current_context;
2421     }
2422     else if (target->container.type == WINED3D_CONTAINER_SWAPCHAIN)
2423     {
2424         TRACE("Rendering onscreen.\n");
2425
2426         context = swapchain_get_context(target->container.u.swapchain);
2427     }
2428     else
2429     {
2430         TRACE("Rendering offscreen.\n");
2431
2432         /* Stay with the current context if possible. Otherwise use the
2433          * context for the primary swapchain. */
2434         if (current_context && current_context->swapchain->device == device)
2435             context = current_context;
2436         else
2437             context = swapchain_get_context(device->swapchains[0]);
2438     }
2439
2440     context_update_window(context);
2441     context_setup_target(context, target);
2442     context_enter(context);
2443     if (!context->valid) return context;
2444
2445     if (context != current_context)
2446     {
2447         if (!context_set_current(context))
2448         {
2449             ERR("Failed to activate the new context.\n");
2450         }
2451         else
2452         {
2453             ENTER_GL();
2454             device->frag_pipe->enable_extension(!context->last_was_blit);
2455             LEAVE_GL();
2456         }
2457     }
2458     else if (context->restore_ctx)
2459     {
2460         context_set_gl_context(context);
2461     }
2462
2463     return context;
2464 }