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 2009-2010 Henri Verbeet for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include <stdio.h>
  24 #ifdef HAVE_FLOAT_H
  25 # include <float.h>
  26 #endif
  27 #include "wined3d_private.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  30
  31 static DWORD wined3d_context_tls_idx;
  32
  33 /* FBO helper functions */
  34
  35 /* GL locking is done by the caller */
  36 void context_bind_fbo(struct wined3d_context *context, GLenum target, GLuint *fbo)
  37 {
  38     const struct wined3d_gl_info *gl_info = context->gl_info;
  39     GLuint f;
  40
  41     if (!fbo)
  42     {
  43         f = 0;
  44     }
  45     else
  46     {
  47         if (!*fbo)
  48         {
  49             gl_info->fbo_ops.glGenFramebuffers(1, fbo);
  50             checkGLcall("glGenFramebuffers()");
  51             TRACE("Created FBO %u.\n", *fbo);
  52         }
  53         f = *fbo;
  54     }
  55
  56     switch (target)
  57     {
  58         case GL_READ_FRAMEBUFFER:
  59             if (context->fbo_read_binding == f) return;
  60             context->fbo_read_binding = f;
  61             break;
  62
  63         case GL_DRAW_FRAMEBUFFER:
  64             if (context->fbo_draw_binding == f) return;
  65             context->fbo_draw_binding = f;
  66             break;
  67
  68         case GL_FRAMEBUFFER:
  69             if (context->fbo_read_binding == f
  70                     && context->fbo_draw_binding == f) return;
  71             context->fbo_read_binding = f;
  72             context->fbo_draw_binding = f;
  73             break;
  74
  75         default:
  76             FIXME("Unhandled target %#x.\n", target);
  77             break;
  78     }
  79
  80     gl_info->fbo_ops.glBindFramebuffer(target, f);
  81     checkGLcall("glBindFramebuffer()");
  82 }
  83
  84 /* GL locking is done by the caller */
  85 static void context_clean_fbo_attachments(const struct wined3d_gl_info *gl_info, GLenum target)
  86 {
  87     unsigned int i;
  88
  89     for (i = 0; i < gl_info->limits.buffers; ++i)
  90     {
  91         gl_info->fbo_ops.glFramebufferTexture2D(target, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, 0, 0);
  92         checkGLcall("glFramebufferTexture2D()");
  93     }
  94     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  95     checkGLcall("glFramebufferTexture2D()");
  96
  97     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  98     checkGLcall("glFramebufferTexture2D()");
  99 }
 100
 101 /* GL locking is done by the caller */
 102 static void context_destroy_fbo(struct wined3d_context *context, GLuint *fbo)
 103 {
 104     const struct wined3d_gl_info *gl_info = context->gl_info;
 105
 106     context_bind_fbo(context, GL_FRAMEBUFFER, fbo);
 107     context_clean_fbo_attachments(gl_info, GL_FRAMEBUFFER);
 108     context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
 109
 110     gl_info->fbo_ops.glDeleteFramebuffers(1, fbo);
 111     checkGLcall("glDeleteFramebuffers()");
 112 }
 113
 114 /* GL locking is done by the caller */
 115 static void context_apply_attachment_filter_states(IWineD3DSurfaceImpl *surface, DWORD location)
 116 {
 117     /* Update base texture states array */
 118     if (surface->container.type == WINED3D_CONTAINER_TEXTURE)
 119     {
 120         IWineD3DBaseTextureImpl *texture_impl = surface->container.u.texture;
 121         IWineD3DDeviceImpl *device = surface->resource.device;
 122         BOOL update_minfilter = FALSE;
 123         BOOL update_magfilter = FALSE;
 124         struct gl_texture *gl_tex;
 125
 126         switch (location)
 127         {
 128             case SFLAG_INTEXTURE:
 129                 gl_tex = &texture_impl->baseTexture.texture_rgb;
 130                 break;
 131
 132             case SFLAG_INSRGBTEX:
 133                 gl_tex = &texture_impl->baseTexture.texture_srgb;
 134                 break;
 135
 136             default:
 137                 ERR("Unsupported location %s (%#x).\n", debug_surflocation(location), location);
 138                 IWineD3DBaseTexture_Release((IWineD3DBaseTexture *)texture_impl);
 139                 return;
 140         }
 141
 142         if (gl_tex->states[WINED3DTEXSTA_MINFILTER] != WINED3DTEXF_POINT
 143             || gl_tex->states[WINED3DTEXSTA_MIPFILTER] != WINED3DTEXF_NONE)
 144         {
 145             gl_tex->states[WINED3DTEXSTA_MINFILTER] = WINED3DTEXF_POINT;
 146             gl_tex->states[WINED3DTEXSTA_MIPFILTER] = WINED3DTEXF_NONE;
 147             update_minfilter = TRUE;
 148         }
 149
 150         if (gl_tex->states[WINED3DTEXSTA_MAGFILTER] != WINED3DTEXF_POINT)
 151         {
 152             gl_tex->states[WINED3DTEXSTA_MAGFILTER] = WINED3DTEXF_POINT;
 153             update_magfilter = TRUE;
 154         }
 155
 156         if (texture_impl->baseTexture.bindCount)
 157         {
 158             WARN("Render targets should not be bound to a sampler\n");
 159             IWineD3DDeviceImpl_MarkStateDirty(device, STATE_SAMPLER(texture_impl->baseTexture.sampler));
 160         }
 161
 162         if (update_minfilter || update_magfilter)
 163         {
 164             GLenum target, bind_target;
 165             GLint old_binding;
 166
 167             target = surface->texture_target;
 168             if (target == GL_TEXTURE_2D)
 169             {
 170                 bind_target = GL_TEXTURE_2D;
 171                 glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_binding);
 172             }
 173             else if (target == GL_TEXTURE_RECTANGLE_ARB)
 174             {
 175                 bind_target = GL_TEXTURE_RECTANGLE_ARB;
 176                 glGetIntegerv(GL_TEXTURE_BINDING_RECTANGLE_ARB, &old_binding);
 177             }
 178             else
 179             {
 180                 bind_target = GL_TEXTURE_CUBE_MAP_ARB;
 181                 glGetIntegerv(GL_TEXTURE_BINDING_CUBE_MAP_ARB, &old_binding);
 182             }
 183
 184             glBindTexture(bind_target, gl_tex->name);
 185             if (update_minfilter) glTexParameteri(bind_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 186             if (update_magfilter) glTexParameteri(bind_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 187             glBindTexture(bind_target, old_binding);
 188         }
 189
 190         checkGLcall("apply_attachment_filter_states()");
 191     }
 192 }
 193
 194 /* GL locking is done by the caller */
 195 void context_attach_depth_stencil_fbo(struct wined3d_context *context,
 196         GLenum fbo_target, IWineD3DSurfaceImpl *depth_stencil, BOOL use_render_buffer)
 197 {
 198     const struct wined3d_gl_info *gl_info = context->gl_info;
 199
 200     TRACE("Attach depth stencil %p\n", depth_stencil);
 201
 202     if (depth_stencil)
 203     {
 204         DWORD format_flags = depth_stencil->resource.format->flags;
 205
 206         if (use_render_buffer && depth_stencil->current_renderbuffer)
 207         {
 208             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 209             {
 210                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_DEPTH_ATTACHMENT,
 211                         GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
 212                 checkGLcall("glFramebufferRenderbuffer()");
 213             }
 214
 215             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 216             {
 217                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_STENCIL_ATTACHMENT,
 218                         GL_RENDERBUFFER, depth_stencil->current_renderbuffer->id);
 219                 checkGLcall("glFramebufferRenderbuffer()");
 220             }
 221         }
 222         else
 223         {
 224             surface_prepare_texture(depth_stencil, gl_info, FALSE);
 225             context_apply_attachment_filter_states(depth_stencil, SFLAG_INTEXTURE);
 226
 227             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 228             {
 229                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT,
 230                         depth_stencil->texture_target, depth_stencil->texture_name,
 231                         depth_stencil->texture_level);
 232                 checkGLcall("glFramebufferTexture2D()");
 233             }
 234
 235             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 236             {
 237                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT,
 238                         depth_stencil->texture_target, depth_stencil->texture_name,
 239                         depth_stencil->texture_level);
 240                 checkGLcall("glFramebufferTexture2D()");
 241             }
 242         }
 243
 244         if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
 245         {
 246             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 247             checkGLcall("glFramebufferTexture2D()");
 248         }
 249
 250         if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
 251         {
 252             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 253             checkGLcall("glFramebufferTexture2D()");
 254         }
 255     }
 256     else
 257     {
 258         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 259         checkGLcall("glFramebufferTexture2D()");
 260
 261         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 262         checkGLcall("glFramebufferTexture2D()");
 263     }
 264 }
 265
 266 /* GL locking is done by the caller */
 267 static void context_attach_surface_fbo(const struct wined3d_context *context,
 268         GLenum fbo_target, DWORD idx, IWineD3DSurfaceImpl *surface, DWORD location)
 269 {
 270     const struct wined3d_gl_info *gl_info = context->gl_info;
 271
 272     TRACE("Attach surface %p to %u\n", surface, idx);
 273
 274     if (surface)
 275     {
 276         switch (location)
 277         {
 278             case SFLAG_INTEXTURE:
 279                 surface_prepare_texture(surface, gl_info, FALSE);
 280                 context_apply_attachment_filter_states(surface, location);
 281                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 282                         surface->texture_target, surface->texture_name, surface->texture_level);
 283                 break;
 284
 285             case SFLAG_INSRGBTEX:
 286                 surface_prepare_texture(surface, gl_info, TRUE);
 287                 context_apply_attachment_filter_states(surface, location);
 288                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 289                         surface->texture_target, surface->texture_name_srgb, surface->texture_level);
 290                 break;
 291
 292             default:
 293                 ERR("Unsupported location %s (%#x).\n", debug_surflocation(location), location);
 294                 break;
 295         }
 296         checkGLcall("glFramebufferTexture2D()");
 297     }
 298     else
 299     {
 300         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, GL_TEXTURE_2D, 0, 0);
 301         checkGLcall("glFramebufferTexture2D()");
 302     }
 303 }
 304
 305 /* GL locking is done by the caller */
 306 static void context_check_fbo_status(struct wined3d_context *context, GLenum target)
 307 {
 308     const struct wined3d_gl_info *gl_info = context->gl_info;
 309     GLenum status;
 310
 311     status = gl_info->fbo_ops.glCheckFramebufferStatus(target);
 312     if (status == GL_FRAMEBUFFER_COMPLETE)
 313     {
 314         TRACE("FBO complete\n");
 315     } else {
 316         IWineD3DSurfaceImpl *attachment;
 317         unsigned int i;
 318         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 319
 320         if (!context->current_fbo)
 321         {
 322             ERR("FBO 0 is incomplete, driver bug?\n");
 323             return;
 324         }
 325
 326         FIXME("\tLocation %s (%#x).\n", debug_surflocation(context->current_fbo->location),
 327                 context->current_fbo->location);
 328
 329         /* Dump the FBO attachments */
 330         for (i = 0; i < gl_info->limits.buffers; ++i)
 331         {
 332             attachment = context->current_fbo->render_targets[i];
 333             if (attachment)
 334             {
 335                 FIXME("\tColor attachment %d: (%p) %s %ux%u\n",
 336                         i, attachment, debug_d3dformat(attachment->resource.format->id),
 337                         attachment->pow2Width, attachment->pow2Height);
 338             }
 339         }
 340         attachment = context->current_fbo->depth_stencil;
 341         if (attachment)
 342         {
 343             FIXME("\tDepth attachment: (%p) %s %ux%u\n",
 344                     attachment, debug_d3dformat(attachment->resource.format->id),
 345                     attachment->pow2Width, attachment->pow2Height);
 346         }
 347     }
 348 }
 349
 350 static struct fbo_entry *context_create_fbo_entry(struct wined3d_context *context,
 351         IWineD3DSurfaceImpl **render_targets, IWineD3DSurfaceImpl *depth_stencil, DWORD location)
 352 {
 353     const struct wined3d_gl_info *gl_info = context->gl_info;
 354     struct fbo_entry *entry;
 355
 356     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 357     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
 358     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 359     entry->depth_stencil = depth_stencil;
 360     entry->location = location;
 361     entry->attached = FALSE;
 362     entry->id = 0;
 363
 364     return entry;
 365 }
 366
 367 /* GL locking is done by the caller */
 368 static void context_reuse_fbo_entry(struct wined3d_context *context, GLenum target,
 369         IWineD3DSurfaceImpl **render_targets, IWineD3DSurfaceImpl *depth_stencil,
 370         DWORD location, struct fbo_entry *entry)
 371 {
 372     const struct wined3d_gl_info *gl_info = context->gl_info;
 373
 374     context_bind_fbo(context, target, &entry->id);
 375     context_clean_fbo_attachments(gl_info, target);
 376
 377     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 378     entry->depth_stencil = depth_stencil;
 379     entry->location = location;
 380     entry->attached = FALSE;
 381 }
 382
 383 /* GL locking is done by the caller */
 384 static void context_destroy_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 385 {
 386     if (entry->id)
 387     {
 388         TRACE("Destroy FBO %d\n", entry->id);
 389         context_destroy_fbo(context, &entry->id);
 390     }
 391     --context->fbo_entry_count;
 392     list_remove(&entry->entry);
 393     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 394     HeapFree(GetProcessHeap(), 0, entry);
 395 }
 396
 397
 398 /* GL locking is done by the caller */
 399 static struct fbo_entry *context_find_fbo_entry(struct wined3d_context *context, GLenum target,
 400         IWineD3DSurfaceImpl **render_targets, IWineD3DSurfaceImpl *depth_stencil, DWORD location)
 401 {
 402     const struct wined3d_gl_info *gl_info = context->gl_info;
 403     struct fbo_entry *entry;
 404
 405     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 406     {
 407         if (!memcmp(entry->render_targets,
 408                 render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
 409                 && entry->depth_stencil == depth_stencil && entry->location == location)
 410         {
 411             list_remove(&entry->entry);
 412             list_add_head(&context->fbo_list, &entry->entry);
 413             return entry;
 414         }
 415     }
 416
 417     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 418     {
 419         entry = context_create_fbo_entry(context, render_targets, depth_stencil, location);
 420         list_add_head(&context->fbo_list, &entry->entry);
 421         ++context->fbo_entry_count;
 422     }
 423     else
 424     {
 425         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 426         context_reuse_fbo_entry(context, target, render_targets, depth_stencil, location, entry);
 427         list_remove(&entry->entry);
 428         list_add_head(&context->fbo_list, &entry->entry);
 429     }
 430
 431     return entry;
 432 }
 433
 434 /* GL locking is done by the caller */
 435 static void context_apply_fbo_entry(struct wined3d_context *context, GLenum target, struct fbo_entry *entry)
 436 {
 437     const struct wined3d_gl_info *gl_info = context->gl_info;
 438     unsigned int i;
 439
 440     context_bind_fbo(context, target, &entry->id);
 441
 442     if (!entry->attached)
 443     {
 444         /* Apply render targets */
 445         for (i = 0; i < gl_info->limits.buffers; ++i)
 446         {
 447             context_attach_surface_fbo(context, target, i, entry->render_targets[i], entry->location);
 448         }
 449
 450         /* Apply depth targets */
 451         if (entry->depth_stencil)
 452         {
 453             surface_set_compatible_renderbuffer(entry->depth_stencil,
 454                     entry->render_targets[0]->pow2Width, entry->render_targets[0]->pow2Height);
 455         }
 456         context_attach_depth_stencil_fbo(context, target, entry->depth_stencil, TRUE);
 457
 458         entry->attached = TRUE;
 459     }
 460     else
 461     {
 462         for (i = 0; i < gl_info->limits.buffers; ++i)
 463         {
 464             if (entry->render_targets[i])
 465                 context_apply_attachment_filter_states(entry->render_targets[i], entry->location);
 466         }
 467         if (entry->depth_stencil)
 468             context_apply_attachment_filter_states(entry->depth_stencil, SFLAG_INTEXTURE);
 469     }
 470 }
 471
 472 /* GL locking is done by the caller */
 473 static void context_apply_fbo_state(struct wined3d_context *context, GLenum target,
 474         IWineD3DSurfaceImpl **render_targets, IWineD3DSurfaceImpl *depth_stencil, DWORD location)
 475 {
 476     struct fbo_entry *entry, *entry2;
 477
 478     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 479     {
 480         context_destroy_fbo_entry(context, entry);
 481     }
 482
 483     if (context->rebind_fbo)
 484     {
 485         context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
 486         context->rebind_fbo = FALSE;
 487     }
 488
 489     if (render_targets)
 490     {
 491         context->current_fbo = context_find_fbo_entry(context, target, render_targets, depth_stencil, location);
 492         context_apply_fbo_entry(context, target, context->current_fbo);
 493     }
 494     else
 495     {
 496         context->current_fbo = NULL;
 497         context_bind_fbo(context, target, NULL);
 498     }
 499
 500     context_check_fbo_status(context, target);
 501 }
 502
 503 /* GL locking is done by the caller */
 504 void context_apply_fbo_state_blit(struct wined3d_context *context, GLenum target,
 505         IWineD3DSurfaceImpl *render_target, IWineD3DSurfaceImpl *depth_stencil, DWORD location)
 506 {
 507     if (location != SFLAG_INDRAWABLE || surface_is_offscreen(render_target))
 508     {
 509         UINT clear_size = (context->gl_info->limits.buffers - 1) * sizeof(*context->blit_targets);
 510         context->blit_targets[0] = render_target;
 511         if (clear_size) memset(&context->blit_targets[1], 0, clear_size);
 512         context_apply_fbo_state(context, target, context->blit_targets, depth_stencil, location);
 513     }
 514     else
 515     {
 516         context_apply_fbo_state(context, target, NULL, NULL, location);
 517     }
 518 }
 519
 520 /* Context activation is done by the caller. */
 521 void context_alloc_occlusion_query(struct wined3d_context *context, struct wined3d_occlusion_query *query)
 522 {
 523     const struct wined3d_gl_info *gl_info = context->gl_info;
 524
 525     if (context->free_occlusion_query_count)
 526     {
 527         query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
 528     }
 529     else
 530     {
 531         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 532         {
 533             ENTER_GL();
 534             GL_EXTCALL(glGenQueriesARB(1, &query->id));
 535             checkGLcall("glGenQueriesARB");
 536             LEAVE_GL();
 537
 538             TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
 539         }
 540         else
 541         {
 542             WARN("Occlusion queries not supported, not allocating query id.\n");
 543             query->id = 0;
 544         }
 545     }
 546
 547     query->context = context;
 548     list_add_head(&context->occlusion_queries, &query->entry);
 549 }
 550
 551 void context_free_occlusion_query(struct wined3d_occlusion_query *query)
 552 {
 553     struct wined3d_context *context = query->context;
 554
 555     list_remove(&query->entry);
 556     query->context = NULL;
 557
 558     if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
 559     {
 560         UINT new_size = context->free_occlusion_query_size << 1;
 561         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
 562                 new_size * sizeof(*context->free_occlusion_queries));
 563
 564         if (!new_data)
 565         {
 566             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 567             return;
 568         }
 569
 570         context->free_occlusion_query_size = new_size;
 571         context->free_occlusion_queries = new_data;
 572     }
 573
 574     context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
 575 }
 576
 577 /* Context activation is done by the caller. */
 578 void context_alloc_event_query(struct wined3d_context *context, struct wined3d_event_query *query)
 579 {
 580     const struct wined3d_gl_info *gl_info = context->gl_info;
 581
 582     if (context->free_event_query_count)
 583     {
 584         query->object = context->free_event_queries[--context->free_event_query_count];
 585     }
 586     else
 587     {
 588         if (gl_info->supported[ARB_SYNC])
 589         {
 590             /* Using ARB_sync, not much to do here. */
 591             query->object.sync = NULL;
 592             TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
 593         }
 594         else if (gl_info->supported[APPLE_FENCE])
 595         {
 596             ENTER_GL();
 597             GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
 598             checkGLcall("glGenFencesAPPLE");
 599             LEAVE_GL();
 600
 601             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 602         }
 603         else if(gl_info->supported[NV_FENCE])
 604         {
 605             ENTER_GL();
 606             GL_EXTCALL(glGenFencesNV(1, &query->object.id));
 607             checkGLcall("glGenFencesNV");
 608             LEAVE_GL();
 609
 610             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 611         }
 612         else
 613         {
 614             WARN("Event queries not supported, not allocating query id.\n");
 615             query->object.id = 0;
 616         }
 617     }
 618
 619     query->context = context;
 620     list_add_head(&context->event_queries, &query->entry);
 621 }
 622
 623 void context_free_event_query(struct wined3d_event_query *query)
 624 {
 625     struct wined3d_context *context = query->context;
 626
 627     list_remove(&query->entry);
 628     query->context = NULL;
 629
 630     if (context->free_event_query_count >= context->free_event_query_size - 1)
 631     {
 632         UINT new_size = context->free_event_query_size << 1;
 633         union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
 634                 new_size * sizeof(*context->free_event_queries));
 635
 636         if (!new_data)
 637         {
 638             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
 639             return;
 640         }
 641
 642         context->free_event_query_size = new_size;
 643         context->free_event_queries = new_data;
 644     }
 645
 646     context->free_event_queries[context->free_event_query_count++] = query->object;
 647 }
 648
 649 typedef void (context_fbo_entry_func_t)(struct wined3d_context *context, struct fbo_entry *entry);
 650
 651 static void context_enum_surface_fbo_entries(IWineD3DDeviceImpl *device,
 652         IWineD3DSurfaceImpl *surface, context_fbo_entry_func_t *callback)
 653 {
 654     UINT i;
 655
 656     for (i = 0; i < device->numContexts; ++i)
 657     {
 658         struct wined3d_context *context = device->contexts[i];
 659         const struct wined3d_gl_info *gl_info = context->gl_info;
 660         struct fbo_entry *entry, *entry2;
 661
 662         if (context->current_rt == surface) context->current_rt = NULL;
 663
 664         LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 665         {
 666             UINT j;
 667
 668             if (entry->depth_stencil == surface)
 669             {
 670                 callback(context, entry);
 671                 continue;
 672             }
 673
 674             for (j = 0; j < gl_info->limits.buffers; ++j)
 675             {
 676                 if (entry->render_targets[j] == surface)
 677                 {
 678                     callback(context, entry);
 679                     break;
 680                 }
 681             }
 682         }
 683     }
 684 }
 685
 686 static void context_queue_fbo_entry_destruction(struct wined3d_context *context, struct fbo_entry *entry)
 687 {
 688     list_remove(&entry->entry);
 689     list_add_head(&context->fbo_destroy_list, &entry->entry);
 690 }
 691
 692 void context_resource_released(IWineD3DDeviceImpl *device, IWineD3DResource *resource, WINED3DRESOURCETYPE type)
 693 {
 694     if (!device->d3d_initialized) return;
 695
 696     switch (type)
 697     {
 698         case WINED3DRTYPE_SURFACE:
 699             context_enum_surface_fbo_entries(device, (IWineD3DSurfaceImpl *)resource,
 700                     context_queue_fbo_entry_destruction);
 701             break;
 702
 703         default:
 704             break;
 705     }
 706 }
 707
 708 static void context_detach_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 709 {
 710     entry->attached = FALSE;
 711 }
 712
 713 void context_resource_unloaded(IWineD3DDeviceImpl *device, IWineD3DResource *resource, WINED3DRESOURCETYPE type)
 714 {
 715     switch (type)
 716     {
 717         case WINED3DRTYPE_SURFACE:
 718             context_enum_surface_fbo_entries(device, (IWineD3DSurfaceImpl *)resource,
 719                     context_detach_fbo_entry);
 720             break;
 721
 722         default:
 723             break;
 724     }
 725 }
 726
 727 void context_surface_update(struct wined3d_context *context, IWineD3DSurfaceImpl *surface)
 728 {
 729     const struct wined3d_gl_info *gl_info = context->gl_info;
 730     struct fbo_entry *entry = context->current_fbo;
 731     unsigned int i;
 732
 733     if (!entry || context->rebind_fbo) return;
 734
 735     for (i = 0; i < gl_info->limits.buffers; ++i)
 736     {
 737         if (surface == entry->render_targets[i])
 738         {
 739             TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
 740             context->rebind_fbo = TRUE;
 741             return;
 742         }
 743     }
 744
 745     if (surface == entry->depth_stencil)
 746     {
 747         TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
 748         context->rebind_fbo = TRUE;
 749     }
 750 }
 751
 752 static BOOL context_set_pixel_format(const struct wined3d_gl_info *gl_info, HDC dc, int format)
 753 {
 754     int current = GetPixelFormat(dc);
 755
 756     if (current == format) return TRUE;
 757
 758     if (!current)
 759     {
 760         if (!SetPixelFormat(dc, format, NULL))
 761         {
 762             ERR("Failed to set pixel format %d on device context %p, last error %#x.\n",
 763                     format, dc, GetLastError());
 764             return FALSE;
 765         }
 766         return TRUE;
 767     }
 768
 769     /* By default WGL doesn't allow pixel format adjustments but we need it
 770      * here. For this reason there's a Wine specific wglSetPixelFormat()
 771      * which allows us to set the pixel format multiple times. Only use it
 772      * when really needed. */
 773     if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 774     {
 775         if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format, NULL)))
 776         {
 777             ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
 778                     format, dc);
 779             return FALSE;
 780         }
 781         return TRUE;
 782     }
 783
 784     /* OpenGL doesn't allow pixel format adjustments. Print an error and
 785      * continue using the old format. There's a big chance that the old
 786      * format works although with a performance hit and perhaps rendering
 787      * errors. */
 788     ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
 789             format, dc, current);
 790     return TRUE;
 791 }
 792
 793 static void context_update_window(struct wined3d_context *context)
 794 {
 795     TRACE("Updating context %p window from %p to %p.\n",
 796             context, context->win_handle, context->swapchain->win_handle);
 797
 798     if (context->valid)
 799     {
 800         if (!ReleaseDC(context->win_handle, context->hdc))
 801         {
 802             ERR("Failed to release device context %p, last error %#x.\n",
 803                     context->hdc, GetLastError());
 804         }
 805     }
 806     else context->valid = 1;
 807
 808     context->win_handle = context->swapchain->win_handle;
 809
 810     if (!(context->hdc = GetDC(context->win_handle)))
 811     {
 812         ERR("Failed to get a device context for window %p.\n", context->win_handle);
 813         goto err;
 814     }
 815
 816     if (!context_set_pixel_format(context->gl_info, context->hdc, context->pixel_format))
 817     {
 818         ERR("Failed to set pixel format %d on device context %p.\n",
 819                 context->pixel_format, context->hdc);
 820         goto err;
 821     }
 822
 823     if (!pwglMakeCurrent(context->hdc, context->glCtx))
 824     {
 825         ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
 826                 context->glCtx, context->hdc, GetLastError());
 827         goto err;
 828     }
 829
 830     return;
 831
 832 err:
 833     context->valid = 0;
 834 }
 835
 836 /* Do not call while under the GL lock. */
 837 static void context_validate(struct wined3d_context *context)
 838 {
 839     HWND wnd = WindowFromDC(context->hdc);
 840
 841     if (wnd != context->win_handle)
 842     {
 843         WARN("DC %p belongs to window %p instead of %p.\n",
 844                 context->hdc, wnd, context->win_handle);
 845         context->valid = 0;
 846     }
 847
 848     if (context->win_handle != context->swapchain->win_handle)
 849         context_update_window(context);
 850 }
 851
 852 /* Do not call while under the GL lock. */
 853 static void context_destroy_gl_resources(struct wined3d_context *context)
 854 {
 855     const struct wined3d_gl_info *gl_info = context->gl_info;
 856     struct wined3d_occlusion_query *occlusion_query;
 857     struct wined3d_event_query *event_query;
 858     struct fbo_entry *entry, *entry2;
 859     HGLRC restore_ctx;
 860     HDC restore_dc;
 861     unsigned int i;
 862
 863     restore_ctx = pwglGetCurrentContext();
 864     restore_dc = pwglGetCurrentDC();
 865
 866     context_validate(context);
 867     if (context->valid && restore_ctx != context->glCtx) pwglMakeCurrent(context->hdc, context->glCtx);
 868     else restore_ctx = NULL;
 869
 870     ENTER_GL();
 871
 872     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
 873     {
 874         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
 875             GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
 876         occlusion_query->context = NULL;
 877     }
 878
 879     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
 880     {
 881         if (context->valid)
 882         {
 883             if (gl_info->supported[ARB_SYNC])
 884             {
 885                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 886             }
 887             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
 888             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
 889         }
 890         event_query->context = NULL;
 891     }
 892
 893     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 894     {
 895         if (!context->valid) entry->id = 0;
 896         context_destroy_fbo_entry(context, entry);
 897     }
 898
 899     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 900     {
 901         if (!context->valid) entry->id = 0;
 902         context_destroy_fbo_entry(context, entry);
 903     }
 904
 905     if (context->valid)
 906     {
 907         if (context->dst_fbo)
 908         {
 909             TRACE("Destroy dst FBO %d\n", context->dst_fbo);
 910             context_destroy_fbo(context, &context->dst_fbo);
 911         }
 912         if (context->dummy_arbfp_prog)
 913         {
 914             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
 915         }
 916
 917         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 918             GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
 919
 920         if (gl_info->supported[ARB_SYNC])
 921         {
 922             if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 923         }
 924         else if (gl_info->supported[APPLE_FENCE])
 925         {
 926             for (i = 0; i < context->free_event_query_count; ++i)
 927             {
 928                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
 929             }
 930         }
 931         else if (gl_info->supported[NV_FENCE])
 932         {
 933             for (i = 0; i < context->free_event_query_count; ++i)
 934             {
 935                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
 936             }
 937         }
 938
 939         checkGLcall("context cleanup");
 940     }
 941
 942     LEAVE_GL();
 943
 944     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
 945     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
 946
 947     if (restore_ctx)
 948     {
 949         if (!pwglMakeCurrent(restore_dc, restore_ctx))
 950         {
 951             DWORD err = GetLastError();
 952             ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 953                     restore_ctx, restore_dc, err);
 954         }
 955     }
 956     else if (pwglGetCurrentContext() && !pwglMakeCurrent(NULL, NULL))
 957     {
 958         ERR("Failed to disable GL context.\n");
 959     }
 960
 961     ReleaseDC(context->win_handle, context->hdc);
 962
 963     if (!pwglDeleteContext(context->glCtx))
 964     {
 965         DWORD err = GetLastError();
 966         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
 967     }
 968 }
 969
 970 DWORD context_get_tls_idx(void)
 971 {
 972     return wined3d_context_tls_idx;
 973 }
 974
 975 void context_set_tls_idx(DWORD idx)
 976 {
 977     wined3d_context_tls_idx = idx;
 978 }
 979
 980 struct wined3d_context *context_get_current(void)
 981 {
 982     return TlsGetValue(wined3d_context_tls_idx);
 983 }
 984
 985 /* Do not call while under the GL lock. */
 986 BOOL context_set_current(struct wined3d_context *ctx)
 987 {
 988     struct wined3d_context *old = context_get_current();
 989
 990     if (old == ctx)
 991     {
 992         TRACE("Already using D3D context %p.\n", ctx);
 993         return TRUE;
 994     }
 995
 996     if (old)
 997     {
 998         if (old->destroyed)
 999         {
1000             TRACE("Switching away from destroyed context %p.\n", old);
1001             context_destroy_gl_resources(old);
1002             HeapFree(GetProcessHeap(), 0, old);
1003         }
1004         else
1005         {
1006             old->current = 0;
1007         }
1008     }
1009
1010     if (ctx)
1011     {
1012         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1013         if (!pwglMakeCurrent(ctx->hdc, ctx->glCtx))
1014         {
1015             DWORD err = GetLastError();
1016             ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
1017                     ctx->glCtx, ctx->hdc, err);
1018             TlsSetValue(wined3d_context_tls_idx, NULL);
1019             return FALSE;
1020         }
1021         ctx->current = 1;
1022     }
1023     else if(pwglGetCurrentContext())
1024     {
1025         TRACE("Clearing current D3D context.\n");
1026         if (!pwglMakeCurrent(NULL, NULL))
1027         {
1028             DWORD err = GetLastError();
1029             ERR("Failed to clear current GL context, last error %#x.\n", err);
1030             TlsSetValue(wined3d_context_tls_idx, NULL);
1031             return FALSE;
1032         }
1033     }
1034
1035     return TlsSetValue(wined3d_context_tls_idx, ctx);
1036 }
1037
1038 void context_release(struct wined3d_context *context)
1039 {
1040     TRACE("Releasing context %p, level %u.\n", context, context->level);
1041
1042     if (WARN_ON(d3d))
1043     {
1044         if (!context->level)
1045             WARN("Context %p is not active.\n", context);
1046         else if (context != context_get_current())
1047             WARN("Context %p is not the current context.\n", context);
1048     }
1049
1050     if (!--context->level && context->restore_ctx)
1051     {
1052         TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1053         if (!pwglMakeCurrent(context->restore_dc, context->restore_ctx))
1054         {
1055             DWORD err = GetLastError();
1056             ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
1057                     context->restore_ctx, context->restore_dc, err);
1058         }
1059         context->restore_ctx = NULL;
1060         context->restore_dc = NULL;
1061     }
1062 }
1063
1064 static void context_enter(struct wined3d_context *context)
1065 {
1066     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1067
1068     if (!context->level++)
1069     {
1070         const struct wined3d_context *current_context = context_get_current();
1071         HGLRC current_gl = pwglGetCurrentContext();
1072
1073         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1074         {
1075             TRACE("Another GL context (%p on device context %p) is already current.\n",
1076                     current_gl, pwglGetCurrentDC());
1077             context->restore_ctx = current_gl;
1078             context->restore_dc = pwglGetCurrentDC();
1079         }
1080     }
1081 }
1082
1083 /*****************************************************************************
1084  * Context_MarkStateDirty
1085  *
1086  * Marks a state in a context dirty. Only one context, opposed to
1087  * IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
1088  * contexts
1089  *
1090  * Params:
1091  *  context: Context to mark the state dirty in
1092  *  state: State to mark dirty
1093  *  StateTable: Pointer to the state table in use(for state grouping)
1094  *
1095  *****************************************************************************/
1096 static void Context_MarkStateDirty(struct wined3d_context *context, DWORD state, const struct StateEntry *StateTable)
1097 {
1098     DWORD rep = StateTable[state].representative;
1099     DWORD idx;
1100     BYTE shift;
1101
1102     if (isStateDirty(context, rep)) return;
1103
1104     context->dirtyArray[context->numDirtyEntries++] = rep;
1105     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1106     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1107     context->isStateDirty[idx] |= (1 << shift);
1108 }
1109
1110 /* This function takes care of WineD3D pixel format selection. */
1111 static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc,
1112         const struct wined3d_format *color_format, const struct wined3d_format *ds_format,
1113         BOOL auxBuffers, int numSamples, BOOL findCompatible)
1114 {
1115     int iPixelFormat=0;
1116     unsigned int matchtry;
1117     short redBits, greenBits, blueBits, alphaBits, colorBits;
1118     short depthBits=0, stencilBits=0;
1119
1120     static const struct
1121     {
1122         BOOL require_aux;
1123         BOOL exact_alpha;
1124         BOOL exact_color;
1125     }
1126     matches[] =
1127     {
1128         /* First, try without alpha match buffers. MacOS supports aux buffers only
1129          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
1130          * Then try without aux buffers - this is the most common cause for not
1131          * finding a pixel format. Also some drivers(the open source ones)
1132          * only offer 32 bit ARB pixel formats. First try without an exact alpha
1133          * match, then try without an exact alpha and color match.
1134          */
1135         { TRUE,  TRUE,  TRUE  },
1136         { TRUE,  FALSE, TRUE  },
1137         { FALSE, TRUE,  TRUE  },
1138         { FALSE, FALSE, TRUE  },
1139         { TRUE,  FALSE, FALSE },
1140         { FALSE, FALSE, FALSE },
1141     };
1142
1143     int i = 0;
1144     int nCfgs = This->adapter->nCfgs;
1145
1146     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, findCompatible=%d\n",
1147           debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id),
1148           auxBuffers, numSamples, findCompatible);
1149
1150     if (!getColorBits(color_format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1151     {
1152         ERR("Unable to get color bits for format %s (%#x)!\n",
1153                 debug_d3dformat(color_format->id), color_format->id);
1154         return 0;
1155     }
1156
1157     getDepthStencilBits(ds_format, &depthBits, &stencilBits);
1158
1159     for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
1160         for(i=0; i<nCfgs; i++) {
1161             BOOL exactDepthMatch = TRUE;
1162             WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
1163
1164             /* For now only accept RGBA formats. Perhaps some day we will
1165              * allow floating point formats for pbuffers. */
1166             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1167                 continue;
1168
1169             /* In window mode we need a window drawable format and double buffering. */
1170             if(!(cfg->windowDrawable && cfg->doubleBuffer))
1171                 continue;
1172
1173             /* We like to have aux buffers in backbuffer mode */
1174             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
1175                 continue;
1176
1177             if(matches[matchtry].exact_color) {
1178                 if(cfg->redSize != redBits)
1179                     continue;
1180                 if(cfg->greenSize != greenBits)
1181                     continue;
1182                 if(cfg->blueSize != blueBits)
1183                     continue;
1184             } else {
1185                 if(cfg->redSize < redBits)
1186                     continue;
1187                 if(cfg->greenSize < greenBits)
1188                     continue;
1189                 if(cfg->blueSize < blueBits)
1190                     continue;
1191             }
1192             if(matches[matchtry].exact_alpha) {
1193                 if(cfg->alphaSize != alphaBits)
1194                     continue;
1195             } else {
1196                 if(cfg->alphaSize < alphaBits)
1197                     continue;
1198             }
1199
1200             /* We try to locate a format which matches our requirements exactly. In case of
1201              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1202             if(cfg->depthSize < depthBits)
1203                 continue;
1204             else if(cfg->depthSize > depthBits)
1205                 exactDepthMatch = FALSE;
1206
1207             /* In all cases make sure the number of stencil bits matches our requirements
1208              * even when we don't need stencil because it could affect performance EXCEPT
1209              * on cards which don't offer depth formats without stencil like the i915 drivers
1210              * on Linux. */
1211             if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
1212                 continue;
1213
1214             /* Check multisampling support */
1215             if(cfg->numSamples != numSamples)
1216                 continue;
1217
1218             /* When we have passed all the checks then we have found a format which matches our
1219              * requirements. Note that we only check for a limit number of capabilities right now,
1220              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
1221              * can still differ in things like multisampling, stereo, SRGB and other flags.
1222              */
1223
1224             /* Exit the loop as we have found a format :) */
1225             if(exactDepthMatch) {
1226                 iPixelFormat = cfg->iPixelFormat;
1227                 break;
1228             } else if(!iPixelFormat) {
1229                 /* In the end we might end up with a format which doesn't exactly match our depth
1230                  * requirements. Accept the first format we found because formats with higher iPixelFormat
1231                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
1232                 iPixelFormat = cfg->iPixelFormat;
1233             }
1234         }
1235     }
1236
1237     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1238     if(!iPixelFormat && !findCompatible) {
1239         ERR("Can't find a suitable iPixelFormat\n");
1240         return FALSE;
1241     } else if(!iPixelFormat) {
1242         PIXELFORMATDESCRIPTOR pfd;
1243
1244         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1245         /* PixelFormat selection */
1246         ZeroMemory(&pfd, sizeof(pfd));
1247         pfd.nSize      = sizeof(pfd);
1248         pfd.nVersion   = 1;
1249         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1250         pfd.iPixelType = PFD_TYPE_RGBA;
1251         pfd.cAlphaBits = alphaBits;
1252         pfd.cColorBits = colorBits;
1253         pfd.cDepthBits = depthBits;
1254         pfd.cStencilBits = stencilBits;
1255         pfd.iLayerType = PFD_MAIN_PLANE;
1256
1257         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1258         if(!iPixelFormat) {
1259             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1260             ERR("Can't find a suitable iPixelFormat\n");
1261             return FALSE;
1262         }
1263     }
1264
1265     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1266             iPixelFormat, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id));
1267     return iPixelFormat;
1268 }
1269
1270 /* Do not call while under the GL lock. */
1271 struct wined3d_context *context_create(IWineD3DSwapChainImpl *swapchain,
1272         IWineD3DSurfaceImpl *target, const struct wined3d_format *ds_format)
1273 {
1274     IWineD3DDeviceImpl *device = swapchain->device;
1275     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1276     const struct wined3d_format *color_format;
1277     struct wined3d_context *ret;
1278     PIXELFORMATDESCRIPTOR pfd;
1279     BOOL auxBuffers = FALSE;
1280     int numSamples = 0;
1281     int pixel_format;
1282     unsigned int s;
1283     int swap_interval;
1284     DWORD state;
1285     HGLRC ctx;
1286     HDC hdc;
1287
1288     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1289
1290     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1291     if (!ret)
1292     {
1293         ERR("Failed to allocate context memory.\n");
1294         return NULL;
1295     }
1296
1297     if (!(hdc = GetDC(swapchain->win_handle)))
1298     {
1299         ERR("Failed to retrieve a device context.\n");
1300         goto out;
1301     }
1302
1303     color_format = target->resource.format;
1304
1305     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1306      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1307     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1308     {
1309         auxBuffers = TRUE;
1310
1311         if (color_format->id == WINED3DFMT_B4G4R4X4_UNORM)
1312             color_format = wined3d_get_format(gl_info, WINED3DFMT_B4G4R4A4_UNORM);
1313         else if (color_format->id == WINED3DFMT_B8G8R8X8_UNORM)
1314             color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1315     }
1316
1317     /* DirectDraw supports 8bit paletted render targets and these are used by
1318      * old games like Starcraft and C&C. Most modern hardware doesn't support
1319      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1320      * conversion (ab)uses the alpha component for storing the palette index.
1321      * For this reason we require a format with 8bit alpha, so request
1322      * A8R8G8B8. */
1323     if (color_format->id == WINED3DFMT_P8_UINT)
1324         color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1325
1326     /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD. */
1327     if (swapchain->presentParms.MultiSampleType && (swapchain->presentParms.SwapEffect == WINED3DSWAPEFFECT_DISCARD))
1328     {
1329         if (!gl_info->supported[ARB_MULTISAMPLE])
1330             WARN("The application is requesting multisampling without support.\n");
1331         else
1332         {
1333             TRACE("Requesting multisample type %#x.\n", swapchain->presentParms.MultiSampleType);
1334             numSamples = swapchain->presentParms.MultiSampleType;
1335         }
1336     }
1337
1338     /* Try to find a pixel format which matches our requirements. */
1339     pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format, ds_format,
1340             auxBuffers, numSamples, FALSE /* findCompatible */);
1341
1342     /* Try to locate a compatible format if we weren't able to find anything. */
1343     if (!pixel_format)
1344     {
1345         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1346         pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format, ds_format,
1347                 auxBuffers, 0 /* numSamples */, TRUE /* findCompatible */);
1348     }
1349
1350     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1351     if (!pixel_format)
1352     {
1353         ERR("Can't find a suitable pixel format.\n");
1354         goto out;
1355     }
1356
1357     DescribePixelFormat(hdc, pixel_format, sizeof(pfd), &pfd);
1358     if (!context_set_pixel_format(gl_info, hdc, pixel_format))
1359     {
1360         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1361         goto out;
1362     }
1363
1364     ctx = pwglCreateContext(hdc);
1365     if (device->numContexts)
1366     {
1367         if (!pwglShareLists(device->contexts[0]->glCtx, ctx))
1368         {
1369             DWORD err = GetLastError();
1370             ERR("wglShareLists(%p, %p) failed, last error %#x.\n",
1371                     device->contexts[0]->glCtx, ctx, err);
1372         }
1373     }
1374
1375     if(!ctx) {
1376         ERR("Failed to create a WGL context\n");
1377         goto out;
1378     }
1379
1380     if (!device_context_add(device, ret))
1381     {
1382         ERR("Failed to add the newly created context to the context list\n");
1383         if (!pwglDeleteContext(ctx))
1384         {
1385             DWORD err = GetLastError();
1386             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, err);
1387         }
1388         goto out;
1389     }
1390
1391     ret->gl_info = gl_info;
1392
1393     /* Mark all states dirty to force a proper initialization of the states
1394      * on the first use of the context. */
1395     for (state = 0; state <= STATE_HIGHEST; ++state)
1396     {
1397         if (device->StateTable[state].representative)
1398             Context_MarkStateDirty(ret, state, device->StateTable);
1399     }
1400
1401     ret->swapchain = swapchain;
1402     ret->current_rt = target;
1403     ret->tid = GetCurrentThreadId();
1404
1405     ret->render_offscreen = surface_is_offscreen(target);
1406     ret->draw_buffer_dirty = TRUE;
1407     ret->valid = 1;
1408
1409     ret->glCtx = ctx;
1410     ret->win_handle = swapchain->win_handle;
1411     ret->hdc = hdc;
1412     ret->pixel_format = pixel_format;
1413
1414     if (device->shader_backend->shader_dirtifyable_constants())
1415     {
1416         /* Create the dirty constants array and initialize them to dirty */
1417         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1418                 sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1419         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1420                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1421         memset(ret->vshader_const_dirty, 1,
1422                sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1423         memset(ret->pshader_const_dirty, 1,
1424                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1425     }
1426
1427     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1428             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1429     if (!ret->blit_targets) goto out;
1430
1431     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1432             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1433     if (!ret->draw_buffers) goto out;
1434
1435     ret->free_occlusion_query_size = 4;
1436     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1437             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1438     if (!ret->free_occlusion_queries) goto out;
1439
1440     list_init(&ret->occlusion_queries);
1441
1442     ret->free_event_query_size = 4;
1443     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1444             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1445     if (!ret->free_event_queries) goto out;
1446
1447     list_init(&ret->event_queries);
1448
1449     TRACE("Successfully created new context %p\n", ret);
1450
1451     list_init(&ret->fbo_list);
1452     list_init(&ret->fbo_destroy_list);
1453
1454     context_enter(ret);
1455
1456     /* Set up the context defaults */
1457     if (!context_set_current(ret))
1458     {
1459         ERR("Cannot activate context to set up defaults\n");
1460         context_release(ret);
1461         goto out;
1462     }
1463
1464     switch (swapchain->presentParms.PresentationInterval)
1465     {
1466         case WINED3DPRESENT_INTERVAL_IMMEDIATE:
1467             swap_interval = 0;
1468             break;
1469         case WINED3DPRESENT_INTERVAL_DEFAULT:
1470         case WINED3DPRESENT_INTERVAL_ONE:
1471             swap_interval = 1;
1472             break;
1473         case WINED3DPRESENT_INTERVAL_TWO:
1474             swap_interval = 2;
1475             break;
1476         case WINED3DPRESENT_INTERVAL_THREE:
1477             swap_interval = 3;
1478             break;
1479         case WINED3DPRESENT_INTERVAL_FOUR:
1480             swap_interval = 4;
1481             break;
1482         default:
1483             FIXME("Unknown presentation interval %08x\n", swapchain->presentParms.PresentationInterval);
1484             swap_interval = 1;
1485     }
1486
1487     if (gl_info->supported[WGL_EXT_SWAP_CONTROL])
1488     {
1489         if (!GL_EXTCALL(wglSwapIntervalEXT(swap_interval)))
1490             ERR("wglSwapIntervalEXT failed to set swap interval %d for context %p, last error %#x\n",
1491                 swap_interval, ret, GetLastError());
1492     }
1493
1494     ENTER_GL();
1495
1496     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1497
1498     TRACE("Setting up the screen\n");
1499     /* Clear the screen */
1500     glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
1501     checkGLcall("glClearColor");
1502     glClearIndex(0);
1503     glClearDepth(1);
1504     glClearStencil(0xffff);
1505
1506     checkGLcall("glClear");
1507
1508     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1509     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1510
1511     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1512     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1513
1514     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1515     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1516
1517     glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1518     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1519     glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1520     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1521
1522     if (gl_info->supported[APPLE_CLIENT_STORAGE])
1523     {
1524         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1525          * and textures in DIB sections(due to the memory protection).
1526          */
1527         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1528         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1529     }
1530     if (gl_info->supported[ARB_VERTEX_BLEND])
1531     {
1532         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1533          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1534          * GL_VERTEX_BLEND_ARB isn't enabled too
1535          */
1536         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1537         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1538     }
1539     if (gl_info->supported[NV_TEXTURE_SHADER2])
1540     {
1541         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1542          * the previous texture where to source the offset from is always unit - 1.
1543          */
1544         for (s = 1; s < gl_info->limits.textures; ++s)
1545         {
1546             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1547             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1548             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1549         }
1550     }
1551     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1552     {
1553         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1554          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1555          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1556          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1557          * is ever assigned.
1558          *
1559          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1560          * program and the dummy program is destroyed when the context is destroyed.
1561          */
1562         const char *dummy_program =
1563                 "!!ARBfp1.0\n"
1564                 "MOV result.color, fragment.color.primary;\n"
1565                 "END\n";
1566         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1567         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1568         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1569     }
1570
1571     for (s = 0; s < gl_info->limits.point_sprite_units; ++s)
1572     {
1573         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1574         glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1575         checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1576     }
1577
1578     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1579     {
1580         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1581     }
1582     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1583     {
1584         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1585     }
1586
1587     LEAVE_GL();
1588
1589     device->frag_pipe->enable_extension(TRUE);
1590
1591     TRACE("Created context %p.\n", ret);
1592
1593     return ret;
1594
1595 out:
1596     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1597     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1598     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1599     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1600     HeapFree(GetProcessHeap(), 0, ret->pshader_const_dirty);
1601     HeapFree(GetProcessHeap(), 0, ret->vshader_const_dirty);
1602     HeapFree(GetProcessHeap(), 0, ret);
1603     return NULL;
1604 }
1605
1606 /* Do not call while under the GL lock. */
1607 void context_destroy(IWineD3DDeviceImpl *This, struct wined3d_context *context)
1608 {
1609     BOOL destroy;
1610
1611     TRACE("Destroying ctx %p\n", context);
1612
1613     if (context->tid == GetCurrentThreadId() || !context->current)
1614     {
1615         context_destroy_gl_resources(context);
1616         TlsSetValue(wined3d_context_tls_idx, NULL);
1617         destroy = TRUE;
1618     }
1619     else
1620     {
1621         context->destroyed = 1;
1622         destroy = FALSE;
1623     }
1624
1625     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1626     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1627     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1628     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1629     device_context_remove(This, context);
1630     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1631 }
1632
1633 /* GL locking is done by the caller */
1634 static inline void set_blit_dimension(UINT width, UINT height) {
1635     glMatrixMode(GL_PROJECTION);
1636     checkGLcall("glMatrixMode(GL_PROJECTION)");
1637     glLoadIdentity();
1638     checkGLcall("glLoadIdentity()");
1639     glOrtho(0, width, 0, height, 0.0, -1.0);
1640     checkGLcall("glOrtho");
1641     glViewport(0, 0, width, height);
1642     checkGLcall("glViewport");
1643 }
1644
1645 /*****************************************************************************
1646  * SetupForBlit
1647  *
1648  * Sets up a context for DirectDraw blitting.
1649  * All texture units are disabled, texture unit 0 is set as current unit
1650  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1651  * color writing enabled for all channels
1652  * register combiners disabled, shaders disabled
1653  * world matrix is set to identity, texture matrix 0 too
1654  * projection matrix is setup for drawing screen coordinates
1655  *
1656  * Params:
1657  *  This: Device to activate the context for
1658  *  context: Context to setup
1659  *
1660  *****************************************************************************/
1661 /* Context activation is done by the caller. */
1662 static void SetupForBlit(IWineD3DDeviceImpl *This, struct wined3d_context *context)
1663 {
1664     int i;
1665     const struct StateEntry *StateTable = This->StateTable;
1666     const struct wined3d_gl_info *gl_info = context->gl_info;
1667     UINT width = context->current_rt->currentDesc.Width;
1668     UINT height = context->current_rt->currentDesc.Height;
1669     DWORD sampler;
1670
1671     TRACE("Setting up context %p for blitting\n", context);
1672     if(context->last_was_blit) {
1673         if(context->blit_w != width || context->blit_h != height) {
1674             ENTER_GL();
1675             set_blit_dimension(width, height);
1676             LEAVE_GL();
1677             context->blit_w = width; context->blit_h = height;
1678             /* No need to dirtify here, the states are still dirtified because they weren't
1679              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1680              * be set
1681              */
1682         }
1683         TRACE("Context is already set up for blitting, nothing to do\n");
1684         return;
1685     }
1686     context->last_was_blit = TRUE;
1687
1688     /* TODO: Use a display list */
1689
1690     /* Disable shaders */
1691     ENTER_GL();
1692     This->shader_backend->shader_select(context, FALSE, FALSE);
1693     LEAVE_GL();
1694
1695     Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1696     Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1697
1698     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1699      * helper functions in between gl calls. This function is full of Context_MarkStateDirty
1700      * which can safely be called from here, we only lock once instead locking/unlocking
1701      * after each GL call.
1702      */
1703     ENTER_GL();
1704
1705     /* Disable all textures. The caller can then bind a texture it wants to blit
1706      * from
1707      *
1708      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1709      * function texture unit. No need to care for higher samplers
1710      */
1711     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1712     {
1713         sampler = This->rev_tex_unit_map[i];
1714         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1715         checkGLcall("glActiveTextureARB");
1716
1717         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1718         {
1719             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1720             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1721         }
1722         glDisable(GL_TEXTURE_3D);
1723         checkGLcall("glDisable GL_TEXTURE_3D");
1724         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1725         {
1726             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1727             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1728         }
1729         glDisable(GL_TEXTURE_2D);
1730         checkGLcall("glDisable GL_TEXTURE_2D");
1731
1732         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1733         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1734
1735         if (sampler != WINED3D_UNMAPPED_STAGE)
1736         {
1737             if (sampler < MAX_TEXTURES) {
1738                 Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1739             }
1740             Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1741         }
1742     }
1743     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1744     checkGLcall("glActiveTextureARB");
1745
1746     sampler = This->rev_tex_unit_map[0];
1747
1748     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1749     {
1750         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1751         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1752     }
1753     glDisable(GL_TEXTURE_3D);
1754     checkGLcall("glDisable GL_TEXTURE_3D");
1755     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1756     {
1757         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1758         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1759     }
1760     glDisable(GL_TEXTURE_2D);
1761     checkGLcall("glDisable GL_TEXTURE_2D");
1762
1763     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1764
1765     glMatrixMode(GL_TEXTURE);
1766     checkGLcall("glMatrixMode(GL_TEXTURE)");
1767     glLoadIdentity();
1768     checkGLcall("glLoadIdentity()");
1769
1770     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1771     {
1772         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1773                   GL_TEXTURE_LOD_BIAS_EXT,
1774                   0.0f);
1775         checkGLcall("glTexEnvf GL_TEXTURE_LOD_BIAS_EXT ...");
1776     }
1777
1778     if (sampler != WINED3D_UNMAPPED_STAGE)
1779     {
1780         if (sampler < MAX_TEXTURES) {
1781             Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1782             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1783         }
1784         Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1785     }
1786
1787     /* Other misc states */
1788     glDisable(GL_ALPHA_TEST);
1789     checkGLcall("glDisable(GL_ALPHA_TEST)");
1790     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1791     glDisable(GL_LIGHTING);
1792     checkGLcall("glDisable GL_LIGHTING");
1793     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1794     glDisable(GL_DEPTH_TEST);
1795     checkGLcall("glDisable GL_DEPTH_TEST");
1796     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1797     glDisableWINE(GL_FOG);
1798     checkGLcall("glDisable GL_FOG");
1799     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1800     glDisable(GL_BLEND);
1801     checkGLcall("glDisable GL_BLEND");
1802     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1803     glDisable(GL_CULL_FACE);
1804     checkGLcall("glDisable GL_CULL_FACE");
1805     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1806     glDisable(GL_STENCIL_TEST);
1807     checkGLcall("glDisable GL_STENCIL_TEST");
1808     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1809     glDisable(GL_SCISSOR_TEST);
1810     checkGLcall("glDisable GL_SCISSOR_TEST");
1811     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1812     if (gl_info->supported[ARB_POINT_SPRITE])
1813     {
1814         glDisable(GL_POINT_SPRITE_ARB);
1815         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1816         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1817     }
1818     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1819     checkGLcall("glColorMask");
1820     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE), StateTable);
1821     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE1), StateTable);
1822     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE2), StateTable);
1823     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE3), StateTable);
1824     if (gl_info->supported[EXT_SECONDARY_COLOR])
1825     {
1826         glDisable(GL_COLOR_SUM_EXT);
1827         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1828         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1829     }
1830
1831     /* Setup transforms */
1832     glMatrixMode(GL_MODELVIEW);
1833     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1834     glLoadIdentity();
1835     checkGLcall("glLoadIdentity()");
1836     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1837
1838     context->last_was_rhw = TRUE;
1839     Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1840
1841     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1842     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1843     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1844     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1845     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1846     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1847     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1848
1849     set_blit_dimension(width, height);
1850
1851     LEAVE_GL();
1852
1853     context->blit_w = width; context->blit_h = height;
1854     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1855     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1856
1857     This->frag_pipe->enable_extension(FALSE);
1858 }
1859
1860 /*****************************************************************************
1861  * findThreadContextForSwapChain
1862  *
1863  * Searches a swapchain for all contexts and picks one for the thread tid.
1864  * If none can be found the swapchain is requested to create a new context
1865  *
1866  *****************************************************************************/
1867 static struct wined3d_context *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid)
1868 {
1869     unsigned int i;
1870
1871     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1872         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1873             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1874         }
1875
1876     }
1877
1878     /* Create a new context for the thread */
1879     return swapchain_create_context_for_thread(swapchain);
1880 }
1881
1882 /* Do not call while under the GL lock. */
1883 static struct wined3d_context *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target)
1884 {
1885     struct wined3d_context *current_context = context_get_current();
1886     DWORD tid = GetCurrentThreadId();
1887     struct wined3d_context *context;
1888
1889     if (current_context && current_context->destroyed) current_context = NULL;
1890
1891     if (!target)
1892     {
1893         if (current_context
1894                 && current_context->current_rt
1895                 && current_context->swapchain->device == This)
1896         {
1897             target = current_context->current_rt;
1898         }
1899         else
1900         {
1901             IWineD3DSwapChainImpl *swapchain = (IWineD3DSwapChainImpl *)This->swapchains[0];
1902             if (swapchain->back_buffers) target = swapchain->back_buffers[0];
1903             else target = swapchain->front_buffer;
1904         }
1905     }
1906
1907     if (current_context && current_context->current_rt == target)
1908     {
1909         context_validate(current_context);
1910         return current_context;
1911     }
1912
1913     if (target->container.type == WINED3D_CONTAINER_SWAPCHAIN)
1914     {
1915         IWineD3DSwapChain *swapchain;
1916
1917         TRACE("Rendering onscreen\n");
1918
1919         swapchain = (IWineD3DSwapChain *)target->container.u.swapchain;
1920         context = findThreadContextForSwapChain(swapchain, tid);
1921     }
1922     else
1923     {
1924         TRACE("Rendering offscreen\n");
1925
1926         /* Stay with the currently active context. */
1927         if (current_context && current_context->swapchain->device == This)
1928         {
1929             context = current_context;
1930         }
1931         else
1932         {
1933             /* This may happen if the app jumps straight into offscreen rendering
1934              * Start using the context of the primary swapchain. tid == 0 is no problem
1935              * for findThreadContextForSwapChain.
1936              *
1937              * Can also happen on thread switches - in that case findThreadContextForSwapChain
1938              * is perfect to call. */
1939             context = findThreadContextForSwapChain(This->swapchains[0], tid);
1940         }
1941     }
1942
1943     context_validate(context);
1944
1945     return context;
1946 }
1947
1948 /* Context activation is done by the caller. */
1949 static void context_apply_draw_buffers(struct wined3d_context *context, UINT rt_count, IWineD3DSurfaceImpl **rts)
1950 {
1951     if (!surface_is_offscreen(rts[0]))
1952     {
1953         ENTER_GL();
1954         glDrawBuffer(surface_get_gl_buffer(rts[0]));
1955         checkGLcall("glDrawBuffer()");
1956         LEAVE_GL();
1957     }
1958     else
1959     {
1960         ENTER_GL();
1961         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1962         {
1963             const struct wined3d_gl_info *gl_info = context->gl_info;
1964             unsigned int i;
1965
1966             for (i = 0; i < gl_info->limits.buffers; ++i)
1967             {
1968                 if (i < rt_count && rts[i])
1969                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
1970                 else
1971                     context->draw_buffers[i] = GL_NONE;
1972             }
1973
1974             if (gl_info->supported[ARB_DRAW_BUFFERS])
1975             {
1976                 GL_EXTCALL(glDrawBuffersARB(gl_info->limits.buffers, context->draw_buffers));
1977                 checkGLcall("glDrawBuffers()");
1978             }
1979             else
1980             {
1981                 glDrawBuffer(context->draw_buffers[0]);
1982                 checkGLcall("glDrawBuffer()");
1983             }
1984         }
1985         else
1986         {
1987             glDrawBuffer(rts[0]->resource.device->offscreenBuffer);
1988             checkGLcall("glDrawBuffer()");
1989         }
1990         LEAVE_GL();
1991     }
1992 }
1993
1994 /* GL locking is done by the caller. */
1995 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
1996 {
1997     glDrawBuffer(buffer);
1998     checkGLcall("glDrawBuffer()");
1999     context->draw_buffer_dirty = TRUE;
2000 }
2001
2002 static inline void context_set_render_offscreen(struct wined3d_context *context, const struct StateEntry *StateTable,
2003         BOOL offscreen)
2004 {
2005     if (context->render_offscreen == offscreen) return;
2006
2007     Context_MarkStateDirty(context, STATE_POINTSPRITECOORDORIGIN, StateTable);
2008     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
2009     Context_MarkStateDirty(context, STATE_VDECL, StateTable);
2010     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
2011     Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
2012     Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
2013     context->render_offscreen = offscreen;
2014 }
2015
2016 static BOOL match_depth_stencil_format(const struct wined3d_format *existing,
2017         const struct wined3d_format *required)
2018 {
2019     short existing_depth, existing_stencil, required_depth, required_stencil;
2020
2021     if (existing == required) return TRUE;
2022     if ((existing->flags & WINED3DFMT_FLAG_FLOAT) != (required->flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
2023
2024     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
2025     getDepthStencilBits(required, &required_depth, &required_stencil);
2026
2027     if(existing_depth < required_depth) return FALSE;
2028     /* If stencil bits are used the exact amount is required - otherwise wrapping
2029      * won't work correctly */
2030     if(required_stencil && required_stencil != existing_stencil) return FALSE;
2031     return TRUE;
2032 }
2033 /* The caller provides a context */
2034 static void context_validate_onscreen_formats(IWineD3DDeviceImpl *device,
2035         struct wined3d_context *context, IWineD3DSurfaceImpl *depth_stencil)
2036 {
2037     /* Onscreen surfaces are always in a swapchain */
2038     IWineD3DSwapChainImpl *swapchain = context->current_rt->container.u.swapchain;
2039
2040     if (context->render_offscreen || !depth_stencil) return;
2041     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format)) return;
2042
2043     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2044      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2045      * format. */
2046     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2047
2048     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2049     surface_load_location(context->current_rt, SFLAG_INTEXTURE, NULL);
2050     swapchain->render_to_fbo = TRUE;
2051     context_set_render_offscreen(context, device->StateTable, TRUE);
2052 }
2053
2054 /* Context activation is done by the caller. */
2055 void context_apply_blit_state(struct wined3d_context *context, IWineD3DDeviceImpl *device)
2056 {
2057     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2058     {
2059         context_validate_onscreen_formats(device, context, NULL);
2060
2061         if (context->render_offscreen)
2062         {
2063             surface_internal_preload(context->current_rt, SRGB_RGB);
2064
2065             ENTER_GL();
2066             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, context->current_rt, NULL, SFLAG_INTEXTURE);
2067             LEAVE_GL();
2068         }
2069         else
2070         {
2071             ENTER_GL();
2072             context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
2073             LEAVE_GL();
2074         }
2075
2076         context->draw_buffer_dirty = TRUE;
2077     }
2078
2079     if (context->draw_buffer_dirty)
2080     {
2081         context_apply_draw_buffers(context, 1, &context->current_rt);
2082         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO)
2083             context->draw_buffer_dirty = FALSE;
2084     }
2085
2086     SetupForBlit(device, context);
2087 }
2088
2089 /* Context activation is done by the caller. */
2090 void context_apply_clear_state(struct wined3d_context *context, IWineD3DDeviceImpl *device,
2091         UINT rt_count, IWineD3DSurfaceImpl **rts, IWineD3DSurfaceImpl *depth_stencil)
2092 {
2093     const struct StateEntry *state_table = device->StateTable;
2094     UINT i;
2095
2096     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2097     {
2098         context_validate_onscreen_formats(device, context, depth_stencil);
2099
2100         ENTER_GL();
2101
2102         if (surface_is_offscreen(rts[0]))
2103         {
2104             for (i = 0; i < rt_count; ++i)
2105             {
2106                 context->blit_targets[i] = rts[i];
2107             }
2108             while (i < context->gl_info->limits.buffers)
2109             {
2110                 context->blit_targets[i] = NULL;
2111                 ++i;
2112             }
2113             context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets, depth_stencil, SFLAG_INTEXTURE);
2114         }
2115         else
2116         {
2117             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2118         }
2119
2120         LEAVE_GL();
2121     }
2122
2123     context_apply_draw_buffers(context, rt_count, rts);
2124     context->draw_buffer_dirty = TRUE;
2125
2126     if (context->last_was_blit)
2127     {
2128         device->frag_pipe->enable_extension(TRUE);
2129     }
2130
2131     /* Blending and clearing should be orthogonal, but tests on the nvidia
2132      * driver show that disabling blending when clearing improves the clearing
2133      * performance incredibly. */
2134     ENTER_GL();
2135     glDisable(GL_BLEND);
2136     glEnable(GL_SCISSOR_TEST);
2137     checkGLcall("glEnable GL_SCISSOR_TEST");
2138     LEAVE_GL();
2139
2140     context->last_was_blit = FALSE;
2141     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), state_table);
2142     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), state_table);
2143     Context_MarkStateDirty(context, STATE_SCISSORRECT, state_table);
2144 }
2145
2146 /* Context activation is done by the caller. */
2147 void context_apply_draw_state(struct wined3d_context *context, IWineD3DDeviceImpl *device)
2148 {
2149     const struct StateEntry *state_table = device->StateTable;
2150     unsigned int i;
2151
2152     /* Preload resources before FBO setup. Texture preload in particular may
2153      * result in changes to the current FBO, due to using e.g. FBO blits for
2154      * updating a resource location. */
2155     IWineD3DDeviceImpl_FindTexUnitMap(device);
2156     device_preload_textures(device);
2157     if (isStateDirty(context, STATE_VDECL))
2158         device_update_stream_info(device, context->gl_info);
2159
2160     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2161     {
2162         context_validate_onscreen_formats(device, context, device->depth_stencil);
2163
2164         if (!context->render_offscreen)
2165         {
2166             ENTER_GL();
2167             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2168             LEAVE_GL();
2169         }
2170         else
2171         {
2172             ENTER_GL();
2173             context_apply_fbo_state(context, GL_FRAMEBUFFER, device->render_targets,
2174                     device->depth_stencil, SFLAG_INTEXTURE);
2175             LEAVE_GL();
2176         }
2177     }
2178
2179     if (context->draw_buffer_dirty)
2180     {
2181         context_apply_draw_buffers(context, context->gl_info->limits.buffers, device->render_targets);
2182         context->draw_buffer_dirty = FALSE;
2183     }
2184
2185     if (context->last_was_blit)
2186     {
2187         device->frag_pipe->enable_extension(TRUE);
2188     }
2189
2190     ENTER_GL();
2191     for (i = 0; i < context->numDirtyEntries; ++i)
2192     {
2193         DWORD rep = context->dirtyArray[i];
2194         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
2195         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
2196         context->isStateDirty[idx] &= ~(1 << shift);
2197         state_table[rep].apply(rep, device->stateBlock, context);
2198     }
2199     LEAVE_GL();
2200     context->numDirtyEntries = 0; /* This makes the whole list clean */
2201     context->last_was_blit = FALSE;
2202 }
2203
2204 static void context_setup_target(IWineD3DDeviceImpl *device,
2205         struct wined3d_context *context, IWineD3DSurfaceImpl *target)
2206 {
2207     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2208     const struct StateEntry *StateTable = device->StateTable;
2209
2210     if (!target) return;
2211     render_offscreen = surface_is_offscreen(target);
2212     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
2213
2214     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2215      * the alpha blend state changes with different render target formats. */
2216     if (!context->current_rt)
2217     {
2218         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2219     }
2220     else
2221     {
2222         const struct wined3d_format *old = context->current_rt->resource.format;
2223         const struct wined3d_format *new = target->resource.format;
2224
2225         if (old->id != new->id)
2226         {
2227             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2228             if ((old->alpha_mask && !new->alpha_mask) || (!old->alpha_mask && new->alpha_mask)
2229                     || !(new->flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2230             {
2231                 Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2232             }
2233             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
2234             if ((old->flags & WINED3DFMT_FLAG_SRGB_WRITE) != (new->flags & WINED3DFMT_FLAG_SRGB_WRITE))
2235             {
2236                 Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SRGBWRITEENABLE), StateTable);
2237             }
2238         }
2239
2240         /* When switching away from an offscreen render target, and we're not
2241          * using FBOs, we have to read the drawable into the texture. This is
2242          * done via PreLoad (and SFLAG_INDRAWABLE set on the surface). There
2243          * are some things that need care though. PreLoad needs a GL context,
2244          * and FindContext is called before the context is activated. It also
2245          * has to be called with the old rendertarget active, otherwise a
2246          * wrong drawable is read. */
2247         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2248                 && old_render_offscreen && context->current_rt != target)
2249         {
2250             /* Read the back buffer of the old drawable into the destination texture. */
2251             if (context->current_rt->texture_name_srgb)
2252             {
2253                 surface_internal_preload(context->current_rt, SRGB_BOTH);
2254             }
2255             else
2256             {
2257                 surface_internal_preload(context->current_rt, SRGB_RGB);
2258             }
2259
2260             surface_modify_location(context->current_rt, SFLAG_INDRAWABLE, FALSE);
2261         }
2262     }
2263
2264     context->draw_buffer_dirty = TRUE;
2265     context->current_rt = target;
2266     context_set_render_offscreen(context, StateTable, render_offscreen);
2267 }
2268
2269 /* Do not call while under the GL lock. */
2270 struct wined3d_context *context_acquire(IWineD3DDeviceImpl *device, IWineD3DSurfaceImpl *target)
2271 {
2272     struct wined3d_context *current_context = context_get_current();
2273     struct wined3d_context *context;
2274
2275     TRACE("device %p, target %p.\n", device, target);
2276
2277     context = FindContext(device, target);
2278     context_setup_target(device, context, target);
2279     context_enter(context);
2280     if (!context->valid) return context;
2281
2282     if (context != current_context)
2283     {
2284         if (!context_set_current(context)) ERR("Failed to activate the new context.\n");
2285         else device->frag_pipe->enable_extension(!context->last_was_blit);
2286
2287         if (context->vshader_const_dirty)
2288         {
2289             memset(context->vshader_const_dirty, 1,
2290                     sizeof(*context->vshader_const_dirty) * device->d3d_vshader_constantF);
2291             device->highest_dirty_vs_const = device->d3d_vshader_constantF;
2292         }
2293         if (context->pshader_const_dirty)
2294         {
2295             memset(context->pshader_const_dirty, 1,
2296                    sizeof(*context->pshader_const_dirty) * device->d3d_pshader_constantF);
2297             device->highest_dirty_ps_const = device->d3d_pshader_constantF;
2298         }
2299     }
2300     else if (context->restore_ctx)
2301     {
2302         if (!pwglMakeCurrent(context->hdc, context->glCtx))
2303         {
2304             DWORD err = GetLastError();
2305             ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
2306                     context->hdc, context->glCtx, err);
2307         }
2308     }
2309
2310     return context;
2311 }