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 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_desc->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_desc->format),
 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_desc->format),
 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 (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 static void context_validate(struct wined3d_context *context)
 837 {
 838     HWND wnd = WindowFromDC(context->hdc);
 839
 840     if (wnd != context->win_handle)
 841     {
 842         WARN("DC %p belongs to window %p instead of %p.\n",
 843                 context->hdc, wnd, context->win_handle);
 844         context->valid = 0;
 845     }
 846
 847     if (context->win_handle != context->swapchain->win_handle)
 848         context_update_window(context);
 849 }
 850
 851 static void context_destroy_gl_resources(struct wined3d_context *context)
 852 {
 853     const struct wined3d_gl_info *gl_info = context->gl_info;
 854     struct wined3d_occlusion_query *occlusion_query;
 855     struct wined3d_event_query *event_query;
 856     struct fbo_entry *entry, *entry2;
 857     HGLRC restore_ctx;
 858     HDC restore_dc;
 859     unsigned int i;
 860
 861     restore_ctx = pwglGetCurrentContext();
 862     restore_dc = pwglGetCurrentDC();
 863
 864     context_validate(context);
 865     if (context->valid && restore_ctx != context->glCtx) pwglMakeCurrent(context->hdc, context->glCtx);
 866     else restore_ctx = NULL;
 867
 868     ENTER_GL();
 869
 870     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
 871     {
 872         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
 873             GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
 874         occlusion_query->context = NULL;
 875     }
 876
 877     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
 878     {
 879         if (context->valid)
 880         {
 881             if (gl_info->supported[ARB_SYNC])
 882             {
 883                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 884             }
 885             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
 886             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
 887         }
 888         event_query->context = NULL;
 889     }
 890
 891     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 892     {
 893         if (!context->valid) entry->id = 0;
 894         context_destroy_fbo_entry(context, entry);
 895     }
 896
 897     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 898     {
 899         if (!context->valid) entry->id = 0;
 900         context_destroy_fbo_entry(context, entry);
 901     }
 902
 903     if (context->valid)
 904     {
 905         if (context->dst_fbo)
 906         {
 907             TRACE("Destroy dst FBO %d\n", context->dst_fbo);
 908             context_destroy_fbo(context, &context->dst_fbo);
 909         }
 910         if (context->dummy_arbfp_prog)
 911         {
 912             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
 913         }
 914
 915         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 916             GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
 917
 918         if (gl_info->supported[ARB_SYNC])
 919         {
 920             if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 921         }
 922         else if (gl_info->supported[APPLE_FENCE])
 923         {
 924             for (i = 0; i < context->free_event_query_count; ++i)
 925             {
 926                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
 927             }
 928         }
 929         else if (gl_info->supported[NV_FENCE])
 930         {
 931             for (i = 0; i < context->free_event_query_count; ++i)
 932             {
 933                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
 934             }
 935         }
 936
 937         checkGLcall("context cleanup");
 938     }
 939
 940     LEAVE_GL();
 941
 942     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
 943     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
 944
 945     if (restore_ctx)
 946     {
 947         if (!pwglMakeCurrent(restore_dc, restore_ctx))
 948         {
 949             DWORD err = GetLastError();
 950             ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 951                     restore_ctx, restore_dc, err);
 952         }
 953     }
 954     else if (pwglGetCurrentContext() && !pwglMakeCurrent(NULL, NULL))
 955     {
 956         ERR("Failed to disable GL context.\n");
 957     }
 958
 959     ReleaseDC(context->win_handle, context->hdc);
 960
 961     if (!pwglDeleteContext(context->glCtx))
 962     {
 963         DWORD err = GetLastError();
 964         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
 965     }
 966 }
 967
 968 DWORD context_get_tls_idx(void)
 969 {
 970     return wined3d_context_tls_idx;
 971 }
 972
 973 void context_set_tls_idx(DWORD idx)
 974 {
 975     wined3d_context_tls_idx = idx;
 976 }
 977
 978 struct wined3d_context *context_get_current(void)
 979 {
 980     return TlsGetValue(wined3d_context_tls_idx);
 981 }
 982
 983 BOOL context_set_current(struct wined3d_context *ctx)
 984 {
 985     struct wined3d_context *old = context_get_current();
 986
 987     if (old == ctx)
 988     {
 989         TRACE("Already using D3D context %p.\n", ctx);
 990         return TRUE;
 991     }
 992
 993     if (old)
 994     {
 995         if (old->destroyed)
 996         {
 997             TRACE("Switching away from destroyed context %p.\n", old);
 998             context_destroy_gl_resources(old);
 999             HeapFree(GetProcessHeap(), 0, old);
1000         }
1001         else
1002         {
1003             old->current = 0;
1004         }
1005     }
1006
1007     if (ctx)
1008     {
1009         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1010         if (!pwglMakeCurrent(ctx->hdc, ctx->glCtx))
1011         {
1012             DWORD err = GetLastError();
1013             ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
1014                     ctx->glCtx, ctx->hdc, err);
1015             TlsSetValue(wined3d_context_tls_idx, NULL);
1016             return FALSE;
1017         }
1018         ctx->current = 1;
1019     }
1020     else if(pwglGetCurrentContext())
1021     {
1022         TRACE("Clearing current D3D context.\n");
1023         if (!pwglMakeCurrent(NULL, NULL))
1024         {
1025             DWORD err = GetLastError();
1026             ERR("Failed to clear current GL context, last error %#x.\n", err);
1027             TlsSetValue(wined3d_context_tls_idx, NULL);
1028             return FALSE;
1029         }
1030     }
1031
1032     return TlsSetValue(wined3d_context_tls_idx, ctx);
1033 }
1034
1035 void context_release(struct wined3d_context *context)
1036 {
1037     TRACE("Releasing context %p, level %u.\n", context, context->level);
1038
1039     if (WARN_ON(d3d))
1040     {
1041         if (!context->level)
1042             WARN("Context %p is not active.\n", context);
1043         else if (context != context_get_current())
1044             WARN("Context %p is not the current context.\n", context);
1045     }
1046
1047     if (!--context->level && context->restore_ctx)
1048     {
1049         TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1050         if (!pwglMakeCurrent(context->restore_dc, context->restore_ctx))
1051         {
1052             DWORD err = GetLastError();
1053             ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
1054                     context->restore_ctx, context->restore_dc, err);
1055         }
1056         context->restore_ctx = NULL;
1057         context->restore_dc = NULL;
1058     }
1059 }
1060
1061 static void context_enter(struct wined3d_context *context)
1062 {
1063     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1064
1065     if (!context->level++)
1066     {
1067         const struct wined3d_context *current_context = context_get_current();
1068         HGLRC current_gl = pwglGetCurrentContext();
1069
1070         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1071         {
1072             TRACE("Another GL context (%p on device context %p) is already current.\n",
1073                     current_gl, pwglGetCurrentDC());
1074             context->restore_ctx = current_gl;
1075             context->restore_dc = pwglGetCurrentDC();
1076         }
1077     }
1078 }
1079
1080 /*****************************************************************************
1081  * Context_MarkStateDirty
1082  *
1083  * Marks a state in a context dirty. Only one context, opposed to
1084  * IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
1085  * contexts
1086  *
1087  * Params:
1088  *  context: Context to mark the state dirty in
1089  *  state: State to mark dirty
1090  *  StateTable: Pointer to the state table in use(for state grouping)
1091  *
1092  *****************************************************************************/
1093 static void Context_MarkStateDirty(struct wined3d_context *context, DWORD state, const struct StateEntry *StateTable)
1094 {
1095     DWORD rep = StateTable[state].representative;
1096     DWORD idx;
1097     BYTE shift;
1098
1099     if (isStateDirty(context, rep)) return;
1100
1101     context->dirtyArray[context->numDirtyEntries++] = rep;
1102     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1103     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1104     context->isStateDirty[idx] |= (1 << shift);
1105 }
1106
1107 /* This function takes care of WineD3D pixel format selection. */
1108 static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc,
1109         const struct wined3d_format_desc *color_format_desc, const struct wined3d_format_desc *ds_format_desc,
1110         BOOL auxBuffers, int numSamples, BOOL findCompatible)
1111 {
1112     int iPixelFormat=0;
1113     unsigned int matchtry;
1114     short redBits, greenBits, blueBits, alphaBits, colorBits;
1115     short depthBits=0, stencilBits=0;
1116
1117     static const struct
1118     {
1119         BOOL require_aux;
1120         BOOL exact_alpha;
1121         BOOL exact_color;
1122     }
1123     matches[] =
1124     {
1125         /* First, try without alpha match buffers. MacOS supports aux buffers only
1126          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
1127          * Then try without aux buffers - this is the most common cause for not
1128          * finding a pixel format. Also some drivers(the open source ones)
1129          * only offer 32 bit ARB pixel formats. First try without an exact alpha
1130          * match, then try without an exact alpha and color match.
1131          */
1132         { TRUE,  TRUE,  TRUE  },
1133         { TRUE,  FALSE, TRUE  },
1134         { FALSE, TRUE,  TRUE  },
1135         { FALSE, FALSE, TRUE  },
1136         { TRUE,  FALSE, FALSE },
1137         { FALSE, FALSE, FALSE },
1138     };
1139
1140     int i = 0;
1141     int nCfgs = This->adapter->nCfgs;
1142
1143     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, findCompatible=%d\n",
1144           debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format),
1145           auxBuffers, numSamples, findCompatible);
1146
1147     if (!getColorBits(color_format_desc, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1148     {
1149         ERR("Unable to get color bits for format %s (%#x)!\n",
1150                 debug_d3dformat(color_format_desc->format), color_format_desc->format);
1151         return 0;
1152     }
1153
1154     getDepthStencilBits(ds_format_desc, &depthBits, &stencilBits);
1155
1156     for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
1157         for(i=0; i<nCfgs; i++) {
1158             BOOL exactDepthMatch = TRUE;
1159             WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
1160
1161             /* For now only accept RGBA formats. Perhaps some day we will
1162              * allow floating point formats for pbuffers. */
1163             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1164                 continue;
1165
1166             /* In window mode we need a window drawable format and double buffering. */
1167             if(!(cfg->windowDrawable && cfg->doubleBuffer))
1168                 continue;
1169
1170             /* We like to have aux buffers in backbuffer mode */
1171             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
1172                 continue;
1173
1174             if(matches[matchtry].exact_color) {
1175                 if(cfg->redSize != redBits)
1176                     continue;
1177                 if(cfg->greenSize != greenBits)
1178                     continue;
1179                 if(cfg->blueSize != blueBits)
1180                     continue;
1181             } else {
1182                 if(cfg->redSize < redBits)
1183                     continue;
1184                 if(cfg->greenSize < greenBits)
1185                     continue;
1186                 if(cfg->blueSize < blueBits)
1187                     continue;
1188             }
1189             if(matches[matchtry].exact_alpha) {
1190                 if(cfg->alphaSize != alphaBits)
1191                     continue;
1192             } else {
1193                 if(cfg->alphaSize < alphaBits)
1194                     continue;
1195             }
1196
1197             /* We try to locate a format which matches our requirements exactly. In case of
1198              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1199             if(cfg->depthSize < depthBits)
1200                 continue;
1201             else if(cfg->depthSize > depthBits)
1202                 exactDepthMatch = FALSE;
1203
1204             /* In all cases make sure the number of stencil bits matches our requirements
1205              * even when we don't need stencil because it could affect performance EXCEPT
1206              * on cards which don't offer depth formats without stencil like the i915 drivers
1207              * on Linux. */
1208             if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
1209                 continue;
1210
1211             /* Check multisampling support */
1212             if(cfg->numSamples != numSamples)
1213                 continue;
1214
1215             /* When we have passed all the checks then we have found a format which matches our
1216              * requirements. Note that we only check for a limit number of capabilities right now,
1217              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
1218              * can still differ in things like multisampling, stereo, SRGB and other flags.
1219              */
1220
1221             /* Exit the loop as we have found a format :) */
1222             if(exactDepthMatch) {
1223                 iPixelFormat = cfg->iPixelFormat;
1224                 break;
1225             } else if(!iPixelFormat) {
1226                 /* In the end we might end up with a format which doesn't exactly match our depth
1227                  * requirements. Accept the first format we found because formats with higher iPixelFormat
1228                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
1229                 iPixelFormat = cfg->iPixelFormat;
1230             }
1231         }
1232     }
1233
1234     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1235     if(!iPixelFormat && !findCompatible) {
1236         ERR("Can't find a suitable iPixelFormat\n");
1237         return FALSE;
1238     } else if(!iPixelFormat) {
1239         PIXELFORMATDESCRIPTOR pfd;
1240
1241         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1242         /* PixelFormat selection */
1243         ZeroMemory(&pfd, sizeof(pfd));
1244         pfd.nSize      = sizeof(pfd);
1245         pfd.nVersion   = 1;
1246         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1247         pfd.iPixelType = PFD_TYPE_RGBA;
1248         pfd.cAlphaBits = alphaBits;
1249         pfd.cColorBits = colorBits;
1250         pfd.cDepthBits = depthBits;
1251         pfd.cStencilBits = stencilBits;
1252         pfd.iLayerType = PFD_MAIN_PLANE;
1253
1254         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1255         if(!iPixelFormat) {
1256             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1257             ERR("Can't find a suitable iPixelFormat\n");
1258             return FALSE;
1259         }
1260     }
1261
1262     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1263             iPixelFormat, debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format));
1264     return iPixelFormat;
1265 }
1266
1267 /*****************************************************************************
1268  * context_create
1269  *
1270  * Creates a new context.
1271  *
1272  * * Params:
1273  *  This: Device to activate the context for
1274  *  target: Surface this context will render to
1275  *  win_handle: handle to the window which we are drawing to
1276  *  pPresentParameters: contains the pixelformats to use for onscreen rendering
1277  *
1278  *****************************************************************************/
1279 struct wined3d_context *context_create(IWineD3DSwapChainImpl *swapchain, IWineD3DSurfaceImpl *target,
1280         const struct wined3d_format_desc *ds_format_desc)
1281 {
1282     IWineD3DDeviceImpl *device = swapchain->device;
1283     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1284     const struct wined3d_format_desc *color_format_desc;
1285     struct wined3d_context *ret;
1286     PIXELFORMATDESCRIPTOR pfd;
1287     BOOL auxBuffers = FALSE;
1288     int numSamples = 0;
1289     int pixel_format;
1290     unsigned int s;
1291     DWORD state;
1292     HGLRC ctx;
1293     HDC hdc;
1294
1295     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1296
1297     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1298     if (!ret)
1299     {
1300         ERR("Failed to allocate context memory.\n");
1301         return NULL;
1302     }
1303
1304     if (!(hdc = GetDC(swapchain->win_handle)))
1305     {
1306         ERR("Failed to retrieve a device context.\n");
1307         goto out;
1308     }
1309
1310     color_format_desc = target->resource.format_desc;
1311
1312     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1313      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1314     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1315     {
1316         auxBuffers = TRUE;
1317
1318         if (color_format_desc->format == WINED3DFMT_B4G4R4X4_UNORM)
1319             color_format_desc = getFormatDescEntry(WINED3DFMT_B4G4R4A4_UNORM, gl_info);
1320         else if (color_format_desc->format == WINED3DFMT_B8G8R8X8_UNORM)
1321             color_format_desc = getFormatDescEntry(WINED3DFMT_B8G8R8A8_UNORM, gl_info);
1322     }
1323
1324     /* DirectDraw supports 8bit paletted render targets and these are used by
1325      * old games like Starcraft and C&C. Most modern hardware doesn't support
1326      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1327      * conversion (ab)uses the alpha component for storing the palette index.
1328      * For this reason we require a format with 8bit alpha, so request
1329      * A8R8G8B8. */
1330     if (color_format_desc->format == WINED3DFMT_P8_UINT)
1331         color_format_desc = getFormatDescEntry(WINED3DFMT_B8G8R8A8_UNORM, gl_info);
1332
1333     /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD. */
1334     if (swapchain->presentParms.MultiSampleType && (swapchain->presentParms.SwapEffect == WINED3DSWAPEFFECT_DISCARD))
1335     {
1336         if (!gl_info->supported[ARB_MULTISAMPLE])
1337             WARN("The application is requesting multisampling without support.\n");
1338         else
1339         {
1340             TRACE("Requesting multisample type %#x.\n", swapchain->presentParms.MultiSampleType);
1341             numSamples = swapchain->presentParms.MultiSampleType;
1342         }
1343     }
1344
1345     /* Try to find a pixel format which matches our requirements. */
1346     pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format_desc, ds_format_desc,
1347             auxBuffers, numSamples, FALSE /* findCompatible */);
1348
1349     /* Try to locate a compatible format if we weren't able to find anything. */
1350     if (!pixel_format)
1351     {
1352         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1353         pixel_format = WineD3D_ChoosePixelFormat(device, hdc, color_format_desc, ds_format_desc,
1354                 auxBuffers, 0 /* numSamples */, TRUE /* findCompatible */);
1355     }
1356
1357     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1358     if (!pixel_format)
1359     {
1360         ERR("Can't find a suitable pixel format.\n");
1361         goto out;
1362     }
1363
1364     DescribePixelFormat(hdc, pixel_format, sizeof(pfd), &pfd);
1365     if (!context_set_pixel_format(gl_info, hdc, pixel_format))
1366     {
1367         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1368         goto out;
1369     }
1370
1371     ctx = pwglCreateContext(hdc);
1372     if (device->numContexts)
1373     {
1374         if (!pwglShareLists(device->contexts[0]->glCtx, ctx))
1375         {
1376             DWORD err = GetLastError();
1377             ERR("wglShareLists(%p, %p) failed, last error %#x.\n",
1378                     device->contexts[0]->glCtx, ctx, err);
1379         }
1380     }
1381
1382     if(!ctx) {
1383         ERR("Failed to create a WGL context\n");
1384         goto out;
1385     }
1386
1387     if (!device_context_add(device, ret))
1388     {
1389         ERR("Failed to add the newly created context to the context list\n");
1390         if (!pwglDeleteContext(ctx))
1391         {
1392             DWORD err = GetLastError();
1393             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, err);
1394         }
1395         goto out;
1396     }
1397
1398     ret->gl_info = gl_info;
1399
1400     /* Mark all states dirty to force a proper initialization of the states
1401      * on the first use of the context. */
1402     for (state = 0; state <= STATE_HIGHEST; ++state)
1403     {
1404         if (device->StateTable[state].representative)
1405             Context_MarkStateDirty(ret, state, device->StateTable);
1406     }
1407
1408     ret->swapchain = swapchain;
1409     ret->current_rt = target;
1410     ret->tid = GetCurrentThreadId();
1411
1412     ret->render_offscreen = surface_is_offscreen(target);
1413     ret->draw_buffer_dirty = TRUE;
1414     ret->valid = 1;
1415
1416     ret->glCtx = ctx;
1417     ret->win_handle = swapchain->win_handle;
1418     ret->hdc = hdc;
1419     ret->pixel_format = pixel_format;
1420
1421     if (device->shader_backend->shader_dirtifyable_constants((IWineD3DDevice *)device))
1422     {
1423         /* Create the dirty constants array and initialize them to dirty */
1424         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1425                 sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1426         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
1427                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1428         memset(ret->vshader_const_dirty, 1,
1429                sizeof(*ret->vshader_const_dirty) * device->d3d_vshader_constantF);
1430         memset(ret->pshader_const_dirty, 1,
1431                 sizeof(*ret->pshader_const_dirty) * device->d3d_pshader_constantF);
1432     }
1433
1434     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1435             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1436     if (!ret->blit_targets) goto out;
1437
1438     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1439             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1440     if (!ret->draw_buffers) goto out;
1441
1442     ret->free_occlusion_query_size = 4;
1443     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1444             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1445     if (!ret->free_occlusion_queries) goto out;
1446
1447     list_init(&ret->occlusion_queries);
1448
1449     ret->free_event_query_size = 4;
1450     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1451             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1452     if (!ret->free_event_queries) goto out;
1453
1454     list_init(&ret->event_queries);
1455
1456     TRACE("Successfully created new context %p\n", ret);
1457
1458     list_init(&ret->fbo_list);
1459     list_init(&ret->fbo_destroy_list);
1460
1461     context_enter(ret);
1462
1463     /* Set up the context defaults */
1464     if (!context_set_current(ret))
1465     {
1466         ERR("Cannot activate context to set up defaults\n");
1467         context_release(ret);
1468         goto out;
1469     }
1470
1471     ENTER_GL();
1472
1473     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1474
1475     TRACE("Setting up the screen\n");
1476     /* Clear the screen */
1477     glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
1478     checkGLcall("glClearColor");
1479     glClearIndex(0);
1480     glClearDepth(1);
1481     glClearStencil(0xffff);
1482
1483     checkGLcall("glClear");
1484
1485     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1486     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1487
1488     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1489     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1490
1491     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1492     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1493
1494     glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1495     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1496     glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1497     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1498
1499     if (gl_info->supported[APPLE_CLIENT_STORAGE])
1500     {
1501         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1502          * and textures in DIB sections(due to the memory protection).
1503          */
1504         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1505         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1506     }
1507     if (gl_info->supported[ARB_VERTEX_BLEND])
1508     {
1509         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1510          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1511          * GL_VERTEX_BLEND_ARB isn't enabled too
1512          */
1513         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1514         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1515     }
1516     if (gl_info->supported[NV_TEXTURE_SHADER2])
1517     {
1518         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1519          * the previous texture where to source the offset from is always unit - 1.
1520          */
1521         for (s = 1; s < gl_info->limits.textures; ++s)
1522         {
1523             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1524             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1525             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1526         }
1527     }
1528     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1529     {
1530         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1531          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1532          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1533          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1534          * is ever assigned.
1535          *
1536          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1537          * program and the dummy program is destroyed when the context is destroyed.
1538          */
1539         const char *dummy_program =
1540                 "!!ARBfp1.0\n"
1541                 "MOV result.color, fragment.color.primary;\n"
1542                 "END\n";
1543         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1544         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1545         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1546     }
1547
1548     for (s = 0; s < gl_info->limits.point_sprite_units; ++s)
1549     {
1550         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1551         glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1552         checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1553     }
1554
1555     if (gl_info->supported[WINED3D_GL_VERSION_2_0])
1556     {
1557         /* Windows doesn't support to query the glPointParameteri function pointer, so use the
1558          * NV_POINT_SPRITE extension.
1559          */
1560         if (glPointParameteri)
1561         {
1562             glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, GL_UPPER_LEFT);
1563             checkGLcall("glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, GL_UPPER_LEFT)");
1564         }
1565         else if (gl_info->supported[NV_POINT_SPRITE])
1566         {
1567             GL_EXTCALL(glPointParameteriNV(GL_POINT_SPRITE_COORD_ORIGIN, GL_UPPER_LEFT));
1568             checkGLcall("glPointParameteriNV(GL_POINT_SPRITE_COORD_ORIGIN, GL_UPPER_LEFT)");
1569         }
1570     }
1571
1572     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1573     {
1574         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1575     }
1576     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1577     {
1578         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1579     }
1580
1581     LEAVE_GL();
1582
1583     device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
1584
1585     TRACE("Created context %p.\n", ret);
1586
1587     return ret;
1588
1589 out:
1590     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1591     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1592     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1593     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1594     HeapFree(GetProcessHeap(), 0, ret->pshader_const_dirty);
1595     HeapFree(GetProcessHeap(), 0, ret->vshader_const_dirty);
1596     HeapFree(GetProcessHeap(), 0, ret);
1597     return NULL;
1598 }
1599
1600 /*****************************************************************************
1601  * context_destroy
1602  *
1603  * Destroys a wined3d context
1604  *
1605  * Params:
1606  *  This: Device to activate the context for
1607  *  context: Context to destroy
1608  *
1609  *****************************************************************************/
1610 void context_destroy(IWineD3DDeviceImpl *This, struct wined3d_context *context)
1611 {
1612     BOOL destroy;
1613
1614     TRACE("Destroying ctx %p\n", context);
1615
1616     if (context->tid == GetCurrentThreadId() || !context->current)
1617     {
1618         context_destroy_gl_resources(context);
1619         TlsSetValue(wined3d_context_tls_idx, NULL);
1620         destroy = TRUE;
1621     }
1622     else
1623     {
1624         context->destroyed = 1;
1625         destroy = FALSE;
1626     }
1627
1628     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1629     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1630     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1631     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1632     device_context_remove(This, context);
1633     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1634 }
1635
1636 /* GL locking is done by the caller */
1637 static inline void set_blit_dimension(UINT width, UINT height) {
1638     glMatrixMode(GL_PROJECTION);
1639     checkGLcall("glMatrixMode(GL_PROJECTION)");
1640     glLoadIdentity();
1641     checkGLcall("glLoadIdentity()");
1642     glOrtho(0, width, height, 0, 0.0, -1.0);
1643     checkGLcall("glOrtho");
1644     glViewport(0, 0, width, height);
1645     checkGLcall("glViewport");
1646 }
1647
1648 /*****************************************************************************
1649  * SetupForBlit
1650  *
1651  * Sets up a context for DirectDraw blitting.
1652  * All texture units are disabled, texture unit 0 is set as current unit
1653  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1654  * color writing enabled for all channels
1655  * register combiners disabled, shaders disabled
1656  * world matrix is set to identity, texture matrix 0 too
1657  * projection matrix is setup for drawing screen coordinates
1658  *
1659  * Params:
1660  *  This: Device to activate the context for
1661  *  context: Context to setup
1662  *
1663  *****************************************************************************/
1664 /* Context activation is done by the caller. */
1665 static void SetupForBlit(IWineD3DDeviceImpl *This, struct wined3d_context *context)
1666 {
1667     int i;
1668     const struct StateEntry *StateTable = This->StateTable;
1669     const struct wined3d_gl_info *gl_info = context->gl_info;
1670     UINT width = context->current_rt->currentDesc.Width;
1671     UINT height = context->current_rt->currentDesc.Height;
1672     DWORD sampler;
1673
1674     TRACE("Setting up context %p for blitting\n", context);
1675     if(context->last_was_blit) {
1676         if(context->blit_w != width || context->blit_h != height) {
1677             ENTER_GL();
1678             set_blit_dimension(width, height);
1679             LEAVE_GL();
1680             context->blit_w = width; context->blit_h = height;
1681             /* No need to dirtify here, the states are still dirtified because they weren't
1682              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1683              * be set
1684              */
1685         }
1686         TRACE("Context is already set up for blitting, nothing to do\n");
1687         return;
1688     }
1689     context->last_was_blit = TRUE;
1690
1691     /* TODO: Use a display list */
1692
1693     /* Disable shaders */
1694     ENTER_GL();
1695     This->shader_backend->shader_select(context, FALSE, FALSE);
1696     LEAVE_GL();
1697
1698     Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1699     Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1700
1701     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1702      * helper functions in between gl calls. This function is full of Context_MarkStateDirty
1703      * which can safely be called from here, we only lock once instead locking/unlocking
1704      * after each GL call.
1705      */
1706     ENTER_GL();
1707
1708     /* Disable all textures. The caller can then bind a texture it wants to blit
1709      * from
1710      *
1711      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1712      * function texture unit. No need to care for higher samplers
1713      */
1714     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1715     {
1716         sampler = This->rev_tex_unit_map[i];
1717         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1718         checkGLcall("glActiveTextureARB");
1719
1720         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1721         {
1722             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1723             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1724         }
1725         glDisable(GL_TEXTURE_3D);
1726         checkGLcall("glDisable GL_TEXTURE_3D");
1727         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1728         {
1729             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1730             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1731         }
1732         glDisable(GL_TEXTURE_2D);
1733         checkGLcall("glDisable GL_TEXTURE_2D");
1734
1735         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1736         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1737
1738         if (sampler != WINED3D_UNMAPPED_STAGE)
1739         {
1740             if (sampler < MAX_TEXTURES) {
1741                 Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1742             }
1743             Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1744         }
1745     }
1746     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1747     checkGLcall("glActiveTextureARB");
1748
1749     sampler = This->rev_tex_unit_map[0];
1750
1751     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1752     {
1753         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1754         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1755     }
1756     glDisable(GL_TEXTURE_3D);
1757     checkGLcall("glDisable GL_TEXTURE_3D");
1758     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1759     {
1760         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1761         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1762     }
1763     glDisable(GL_TEXTURE_2D);
1764     checkGLcall("glDisable GL_TEXTURE_2D");
1765
1766     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1767
1768     glMatrixMode(GL_TEXTURE);
1769     checkGLcall("glMatrixMode(GL_TEXTURE)");
1770     glLoadIdentity();
1771     checkGLcall("glLoadIdentity()");
1772
1773     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1774     {
1775         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1776                   GL_TEXTURE_LOD_BIAS_EXT,
1777                   0.0f);
1778         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
1779     }
1780
1781     if (sampler != WINED3D_UNMAPPED_STAGE)
1782     {
1783         if (sampler < MAX_TEXTURES) {
1784             Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1785             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1786         }
1787         Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1788     }
1789
1790     /* Other misc states */
1791     glDisable(GL_ALPHA_TEST);
1792     checkGLcall("glDisable(GL_ALPHA_TEST)");
1793     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1794     glDisable(GL_LIGHTING);
1795     checkGLcall("glDisable GL_LIGHTING");
1796     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1797     glDisable(GL_DEPTH_TEST);
1798     checkGLcall("glDisable GL_DEPTH_TEST");
1799     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1800     glDisableWINE(GL_FOG);
1801     checkGLcall("glDisable GL_FOG");
1802     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1803     glDisable(GL_BLEND);
1804     checkGLcall("glDisable GL_BLEND");
1805     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1806     glDisable(GL_CULL_FACE);
1807     checkGLcall("glDisable GL_CULL_FACE");
1808     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1809     glDisable(GL_STENCIL_TEST);
1810     checkGLcall("glDisable GL_STENCIL_TEST");
1811     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1812     glDisable(GL_SCISSOR_TEST);
1813     checkGLcall("glDisable GL_SCISSOR_TEST");
1814     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1815     if (gl_info->supported[ARB_POINT_SPRITE])
1816     {
1817         glDisable(GL_POINT_SPRITE_ARB);
1818         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1819         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1820     }
1821     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1822     checkGLcall("glColorMask");
1823     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE), StateTable);
1824     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE1), StateTable);
1825     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE2), StateTable);
1826     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_COLORWRITEENABLE3), StateTable);
1827     if (gl_info->supported[EXT_SECONDARY_COLOR])
1828     {
1829         glDisable(GL_COLOR_SUM_EXT);
1830         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1831         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1832     }
1833
1834     /* Setup transforms */
1835     glMatrixMode(GL_MODELVIEW);
1836     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1837     glLoadIdentity();
1838     checkGLcall("glLoadIdentity()");
1839     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1840
1841     context->last_was_rhw = TRUE;
1842     Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1843
1844     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1845     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1846     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1847     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1848     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1849     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1850     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1851
1852     set_blit_dimension(width, height);
1853
1854     LEAVE_GL();
1855
1856     context->blit_w = width; context->blit_h = height;
1857     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1858     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1859
1860
1861     This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1862 }
1863
1864 /*****************************************************************************
1865  * findThreadContextForSwapChain
1866  *
1867  * Searches a swapchain for all contexts and picks one for the thread tid.
1868  * If none can be found the swapchain is requested to create a new context
1869  *
1870  *****************************************************************************/
1871 static struct wined3d_context *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid)
1872 {
1873     unsigned int i;
1874
1875     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1876         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1877             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1878         }
1879
1880     }
1881
1882     /* Create a new context for the thread */
1883     return swapchain_create_context_for_thread(swapchain);
1884 }
1885
1886 /*****************************************************************************
1887  * FindContext
1888  *
1889  * Finds a context for the current render target and thread
1890  *
1891  * Parameters:
1892  *  target: Render target to find the context for
1893  *  tid: Thread to activate the context for
1894  *
1895  * Returns: The needed context
1896  *
1897  *****************************************************************************/
1898 static struct wined3d_context *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target)
1899 {
1900     struct wined3d_context *current_context = context_get_current();
1901     DWORD tid = GetCurrentThreadId();
1902     struct wined3d_context *context;
1903
1904     if (current_context && current_context->destroyed) current_context = NULL;
1905
1906     if (!target)
1907     {
1908         if (current_context
1909                 && current_context->current_rt
1910                 && current_context->swapchain->device == This)
1911         {
1912             target = current_context->current_rt;
1913         }
1914         else
1915         {
1916             IWineD3DSwapChainImpl *swapchain = (IWineD3DSwapChainImpl *)This->swapchains[0];
1917             if (swapchain->back_buffers) target = swapchain->back_buffers[0];
1918             else target = swapchain->front_buffer;
1919         }
1920     }
1921
1922     if (current_context && current_context->current_rt == target)
1923     {
1924         context_validate(current_context);
1925         return current_context;
1926     }
1927
1928     if (target->container.type == WINED3D_CONTAINER_SWAPCHAIN)
1929     {
1930         IWineD3DSwapChain *swapchain;
1931
1932         TRACE("Rendering onscreen\n");
1933
1934         swapchain = (IWineD3DSwapChain *)target->container.u.swapchain;
1935         context = findThreadContextForSwapChain(swapchain, tid);
1936     }
1937     else
1938     {
1939         TRACE("Rendering offscreen\n");
1940
1941         /* Stay with the currently active context. */
1942         if (current_context && current_context->swapchain->device == This)
1943         {
1944             context = current_context;
1945         }
1946         else
1947         {
1948             /* This may happen if the app jumps straight into offscreen rendering
1949              * Start using the context of the primary swapchain. tid == 0 is no problem
1950              * for findThreadContextForSwapChain.
1951              *
1952              * Can also happen on thread switches - in that case findThreadContextForSwapChain
1953              * is perfect to call. */
1954             context = findThreadContextForSwapChain(This->swapchains[0], tid);
1955         }
1956     }
1957
1958     context_validate(context);
1959
1960     return context;
1961 }
1962
1963 /* Context activation is done by the caller. */
1964 static void context_apply_draw_buffer(struct wined3d_context *context, BOOL blit)
1965 {
1966     const struct wined3d_gl_info *gl_info = context->gl_info;
1967     IWineD3DSurfaceImpl *rt = context->current_rt;
1968     IWineD3DDeviceImpl *device;
1969
1970     device = rt->resource.device;
1971     if (!surface_is_offscreen(rt))
1972     {
1973         ENTER_GL();
1974         glDrawBuffer(surface_get_gl_buffer(rt));
1975         checkGLcall("glDrawBuffer()");
1976         LEAVE_GL();
1977     }
1978     else
1979     {
1980         ENTER_GL();
1981         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1982         {
1983             if (!blit)
1984             {
1985                 unsigned int i;
1986
1987                 for (i = 0; i < gl_info->limits.buffers; ++i)
1988                 {
1989                     if (device->render_targets[i])
1990                         context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
1991                     else
1992                         context->draw_buffers[i] = GL_NONE;
1993                 }
1994
1995                 if (gl_info->supported[ARB_DRAW_BUFFERS])
1996                 {
1997                     GL_EXTCALL(glDrawBuffersARB(gl_info->limits.buffers, context->draw_buffers));
1998                     checkGLcall("glDrawBuffers()");
1999                 }
2000                 else
2001                 {
2002                     glDrawBuffer(context->draw_buffers[0]);
2003                     checkGLcall("glDrawBuffer()");
2004                 }
2005             } else {
2006                 glDrawBuffer(GL_COLOR_ATTACHMENT0);
2007                 checkGLcall("glDrawBuffer()");
2008             }
2009         }
2010         else
2011         {
2012             glDrawBuffer(device->offscreenBuffer);
2013             checkGLcall("glDrawBuffer()");
2014         }
2015         LEAVE_GL();
2016     }
2017 }
2018
2019 /* GL locking is done by the caller. */
2020 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
2021 {
2022     glDrawBuffer(buffer);
2023     checkGLcall("glDrawBuffer()");
2024     context->draw_buffer_dirty = TRUE;
2025 }
2026
2027 static inline void context_set_render_offscreen(struct wined3d_context *context, const struct StateEntry *StateTable,
2028         BOOL offscreen)
2029 {
2030     const struct wined3d_gl_info *gl_info = context->gl_info;
2031
2032     if (context->render_offscreen == offscreen) return;
2033
2034     if (gl_info->supported[WINED3D_GL_VERSION_2_0])
2035     {
2036         /* Windows doesn't support to query the glPointParameteri function pointer, so use the
2037          * NV_POINT_SPRITE extension.
2038          */
2039         if (glPointParameteri)
2040         {
2041             glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, offscreen ? GL_LOWER_LEFT : GL_UPPER_LEFT);
2042             checkGLcall("glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, ...)");
2043         }
2044         else if (gl_info->supported[NV_POINT_SPRITE])
2045         {
2046             GL_EXTCALL(glPointParameteriNV(GL_POINT_SPRITE_COORD_ORIGIN, offscreen ? GL_LOWER_LEFT : GL_UPPER_LEFT));
2047             checkGLcall("glPointParameteriNV(GL_POINT_SPRITE_COORD_ORIGIN, ...)");
2048         }
2049     }
2050
2051     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
2052     Context_MarkStateDirty(context, STATE_VDECL, StateTable);
2053     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
2054     Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
2055     Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
2056     context->render_offscreen = offscreen;
2057 }
2058
2059 static BOOL match_depth_stencil_format(const struct wined3d_format_desc *existing,
2060         const struct wined3d_format_desc *required)
2061 {
2062     short existing_depth, existing_stencil, required_depth, required_stencil;
2063
2064     if(existing == required) return TRUE;
2065     if((existing->Flags & WINED3DFMT_FLAG_FLOAT) != (required->Flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
2066
2067     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
2068     getDepthStencilBits(required, &required_depth, &required_stencil);
2069
2070     if(existing_depth < required_depth) return FALSE;
2071     /* If stencil bits are used the exact amount is required - otherwise wrapping
2072      * won't work correctly */
2073     if(required_stencil && required_stencil != existing_stencil) return FALSE;
2074     return TRUE;
2075 }
2076 /* The caller provides a context */
2077 static void context_validate_onscreen_formats(IWineD3DDeviceImpl *device,
2078         struct wined3d_context *context, IWineD3DSurfaceImpl *depth_stencil)
2079 {
2080     /* Onscreen surfaces are always in a swapchain */
2081     IWineD3DSwapChainImpl *swapchain = context->current_rt->container.u.swapchain;
2082
2083     if (context->render_offscreen || !depth_stencil) return;
2084     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format_desc)) return;
2085
2086     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2087      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2088      * format. */
2089     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2090
2091     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2092     surface_load_location(context->current_rt, SFLAG_INTEXTURE, NULL);
2093     swapchain->render_to_fbo = TRUE;
2094     context_set_render_offscreen(context, device->StateTable, TRUE);
2095 }
2096
2097 /* Context activation is done by the caller. */
2098 void context_apply_blit_state(struct wined3d_context *context, IWineD3DDeviceImpl *device)
2099 {
2100     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2101     {
2102         context_validate_onscreen_formats(device, context, NULL);
2103
2104         if (context->render_offscreen)
2105         {
2106             FIXME("Applying blit state for an offscreen target with ORM_FBO. This should be avoided.\n");
2107             surface_internal_preload(context->current_rt, SRGB_RGB);
2108
2109             ENTER_GL();
2110             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, context->current_rt, NULL, SFLAG_INTEXTURE);
2111             LEAVE_GL();
2112         }
2113         else
2114         {
2115             ENTER_GL();
2116             context_bind_fbo(context, GL_FRAMEBUFFER, NULL);
2117             LEAVE_GL();
2118         }
2119
2120         context->draw_buffer_dirty = TRUE;
2121     }
2122
2123     if (context->draw_buffer_dirty)
2124     {
2125         context_apply_draw_buffer(context, TRUE);
2126         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO)
2127             context->draw_buffer_dirty = FALSE;
2128     }
2129
2130     SetupForBlit(device, context);
2131 }
2132
2133 /* Context activation is done by the caller. */
2134 void context_apply_clear_state(struct wined3d_context *context, IWineD3DDeviceImpl *device,
2135         UINT rt_count, IWineD3DSurfaceImpl **rts, IWineD3DSurfaceImpl *depth_stencil)
2136 {
2137     const struct StateEntry *state_table = device->StateTable;
2138     UINT i;
2139
2140     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2141     {
2142         context_validate_onscreen_formats(device, context, depth_stencil);
2143
2144         ENTER_GL();
2145
2146         if (surface_is_offscreen(rts[0]))
2147         {
2148             for (i = 0; i < rt_count; ++i)
2149             {
2150                 context->blit_targets[i] = rts[i];
2151             }
2152             while (i < context->gl_info->limits.buffers)
2153             {
2154                 context->blit_targets[i] = NULL;
2155                 ++i;
2156             }
2157             context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets, depth_stencil, SFLAG_INTEXTURE);
2158         }
2159         else
2160         {
2161             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2162         }
2163
2164         LEAVE_GL();
2165     }
2166
2167     if (!surface_is_offscreen(rts[0]))
2168     {
2169         ENTER_GL();
2170         context_set_draw_buffer(context, surface_get_gl_buffer(rts[0]));
2171         LEAVE_GL();
2172     }
2173     else
2174     {
2175         ENTER_GL();
2176
2177         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2178         {
2179             const struct wined3d_gl_info *gl_info = context->gl_info;
2180             for (i = 0; i < gl_info->limits.buffers; ++i)
2181             {
2182                 if (i < rt_count && rts[i])
2183                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
2184                 else
2185                     context->draw_buffers[i] = GL_NONE;
2186             }
2187             GL_EXTCALL(glDrawBuffersARB(gl_info->limits.buffers, context->draw_buffers));
2188             checkGLcall("glDrawBuffers()");
2189             context->draw_buffer_dirty = TRUE;
2190         }
2191         else
2192         {
2193             glDrawBuffer(device->offscreenBuffer);
2194             checkGLcall("glDrawBuffer()");
2195         }
2196
2197         LEAVE_GL();
2198     }
2199
2200     if (context->last_was_blit)
2201     {
2202         device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
2203     }
2204
2205     /* Blending and clearing should be orthogonal, but tests on the nvidia
2206      * driver show that disabling blending when clearing improves the clearing
2207      * performance incredibly. */
2208     ENTER_GL();
2209     glDisable(GL_BLEND);
2210     glEnable(GL_SCISSOR_TEST);
2211     checkGLcall("glEnable GL_SCISSOR_TEST");
2212     LEAVE_GL();
2213
2214     context->last_was_blit = FALSE;
2215     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), state_table);
2216     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), state_table);
2217     Context_MarkStateDirty(context, STATE_SCISSORRECT, state_table);
2218 }
2219
2220 /* Context activation is done by the caller. */
2221 void context_apply_draw_state(struct wined3d_context *context, IWineD3DDeviceImpl *device)
2222 {
2223     const struct StateEntry *state_table = device->StateTable;
2224     unsigned int i;
2225
2226     /* Preload resources before FBO setup. Texture preload in particular may
2227      * result in changes to the current FBO, due to using e.g. FBO blits for
2228      * updating a resource location. */
2229     IWineD3DDeviceImpl_FindTexUnitMap(device);
2230     device_preload_textures(device);
2231     if (isStateDirty(context, STATE_VDECL))
2232         device_update_stream_info(device, context->gl_info);
2233
2234     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2235     {
2236         context_validate_onscreen_formats(device, context, device->depth_stencil);
2237
2238         if (!context->render_offscreen)
2239         {
2240             ENTER_GL();
2241             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, SFLAG_INDRAWABLE);
2242             LEAVE_GL();
2243         }
2244         else
2245         {
2246             ENTER_GL();
2247             context_apply_fbo_state(context, GL_FRAMEBUFFER, device->render_targets,
2248                     device->depth_stencil, SFLAG_INTEXTURE);
2249             LEAVE_GL();
2250         }
2251     }
2252
2253     if (context->draw_buffer_dirty)
2254     {
2255         context_apply_draw_buffer(context, FALSE);
2256         context->draw_buffer_dirty = FALSE;
2257     }
2258
2259     if (context->last_was_blit)
2260     {
2261         device->frag_pipe->enable_extension((IWineD3DDevice *)device, TRUE);
2262     }
2263
2264     ENTER_GL();
2265     for (i = 0; i < context->numDirtyEntries; ++i)
2266     {
2267         DWORD rep = context->dirtyArray[i];
2268         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
2269         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
2270         context->isStateDirty[idx] &= ~(1 << shift);
2271         state_table[rep].apply(rep, device->stateBlock, context);
2272     }
2273     LEAVE_GL();
2274     context->numDirtyEntries = 0; /* This makes the whole list clean */
2275     context->last_was_blit = FALSE;
2276 }
2277
2278 static void context_setup_target(IWineD3DDeviceImpl *device,
2279         struct wined3d_context *context, IWineD3DSurfaceImpl *target)
2280 {
2281     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2282     const struct StateEntry *StateTable = device->StateTable;
2283
2284     if (!target) return;
2285     render_offscreen = surface_is_offscreen(target);
2286     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
2287
2288     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2289      * the alpha blend state changes with different render target formats. */
2290     if (!context->current_rt)
2291     {
2292         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2293     }
2294     else
2295     {
2296         const struct wined3d_format_desc *old = context->current_rt->resource.format_desc;
2297         const struct wined3d_format_desc *new = target->resource.format_desc;
2298
2299         if (old->format != new->format)
2300         {
2301             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2302             if ((old->alpha_mask && !new->alpha_mask) || (!old->alpha_mask && new->alpha_mask)
2303                     || !(new->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2304             {
2305                 Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
2306             }
2307             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
2308             if ((old->Flags & WINED3DFMT_FLAG_SRGB_WRITE) != (new->Flags & WINED3DFMT_FLAG_SRGB_WRITE))
2309             {
2310                 Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SRGBWRITEENABLE), StateTable);
2311             }
2312         }
2313
2314         /* When switching away from an offscreen render target, and we're not
2315          * using FBOs, we have to read the drawable into the texture. This is
2316          * done via PreLoad (and SFLAG_INDRAWABLE set on the surface). There
2317          * are some things that need care though. PreLoad needs a GL context,
2318          * and FindContext is called before the context is activated. It also
2319          * has to be called with the old rendertarget active, otherwise a
2320          * wrong drawable is read. */
2321         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2322                 && old_render_offscreen && context->current_rt != target)
2323         {
2324             /* Read the back buffer of the old drawable into the destination texture. */
2325             if (context->current_rt->texture_name_srgb)
2326             {
2327                 surface_internal_preload(context->current_rt, SRGB_BOTH);
2328             }
2329             else
2330             {
2331                 surface_internal_preload(context->current_rt, SRGB_RGB);
2332             }
2333
2334             surface_modify_location(context->current_rt, SFLAG_INDRAWABLE, FALSE);
2335         }
2336     }
2337
2338     context->draw_buffer_dirty = TRUE;
2339     context->current_rt = target;
2340     context_set_render_offscreen(context, StateTable, render_offscreen);
2341 }
2342
2343 /*****************************************************************************
2344  * context_acquire
2345  *
2346  * Finds a rendering context and drawable matching the device and render
2347  * target for the current thread, activates them and puts them into the
2348  * requested state.
2349  *
2350  * Params:
2351  *  This: Device to activate the context for
2352  *  target: Requested render target
2353  *  usage: Prepares the context for blitting, drawing or other actions
2354  *
2355  *****************************************************************************/
2356 struct wined3d_context *context_acquire(IWineD3DDeviceImpl *device, IWineD3DSurfaceImpl *target)
2357 {
2358     struct wined3d_context *current_context = context_get_current();
2359     struct wined3d_context *context;
2360
2361     TRACE("device %p, target %p.\n", device, target);
2362
2363     context = FindContext(device, target);
2364     context_setup_target(device, context, target);
2365     context_enter(context);
2366     if (!context->valid) return context;
2367
2368     if (context != current_context)
2369     {
2370         if (!context_set_current(context)) ERR("Failed to activate the new context.\n");
2371         else device->frag_pipe->enable_extension((IWineD3DDevice *)device, !context->last_was_blit);
2372
2373         if (context->vshader_const_dirty)
2374         {
2375             memset(context->vshader_const_dirty, 1,
2376                     sizeof(*context->vshader_const_dirty) * device->d3d_vshader_constantF);
2377             device->highest_dirty_vs_const = device->d3d_vshader_constantF;
2378         }
2379         if (context->pshader_const_dirty)
2380         {
2381             memset(context->pshader_const_dirty, 1,
2382                    sizeof(*context->pshader_const_dirty) * device->d3d_pshader_constantF);
2383             device->highest_dirty_ps_const = device->d3d_pshader_constantF;
2384         }
2385     }
2386     else if (context->restore_ctx)
2387     {
2388         if (!pwglMakeCurrent(context->hdc, context->glCtx))
2389         {
2390             DWORD err = GetLastError();
2391             ERR("Failed to make GL context %p current on device context %p, last error %#x.\n",
2392                     context->hdc, context->glCtx, err);
2393         }
2394     }
2395
2396     return context;
2397 }