dlls/wined3d/context.c

   1 /*
   2  * Context and render target management in wined3d
   3  *
   4  * Copyright 2007-2011, 2013 Stefan Dösinger for CodeWeavers
   5  * Copyright 2009-2011 Henri Verbeet for CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdio.h>
  26 #ifdef HAVE_FLOAT_H
  27 # include <float.h>
  28 #endif
  29
  30 #include "wined3d_private.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  33 WINE_DECLARE_DEBUG_CHANNEL(d3d_perf);
  34 WINE_DECLARE_DEBUG_CHANNEL(d3d_synchronous);
  35
  36 #define WINED3D_MAX_FBO_ENTRIES 64
  37
  38 static DWORD wined3d_context_tls_idx;
  39
  40 /* FBO helper functions */
  41
  42 /* Context activation is done by the caller. */
  43 static void context_bind_fbo(struct wined3d_context *context, GLenum target, GLuint fbo)
  44 {
  45     const struct wined3d_gl_info *gl_info = context->gl_info;
  46
  47     switch (target)
  48     {
  49         case GL_READ_FRAMEBUFFER:
  50             if (context->fbo_read_binding == fbo) return;
  51             context->fbo_read_binding = fbo;
  52             break;
  53
  54         case GL_DRAW_FRAMEBUFFER:
  55             if (context->fbo_draw_binding == fbo) return;
  56             context->fbo_draw_binding = fbo;
  57             break;
  58
  59         case GL_FRAMEBUFFER:
  60             if (context->fbo_read_binding == fbo
  61                     && context->fbo_draw_binding == fbo) return;
  62             context->fbo_read_binding = fbo;
  63             context->fbo_draw_binding = fbo;
  64             break;
  65
  66         default:
  67             FIXME("Unhandled target %#x.\n", target);
  68             break;
  69     }
  70
  71     gl_info->fbo_ops.glBindFramebuffer(target, fbo);
  72     checkGLcall("glBindFramebuffer()");
  73 }
  74
  75 /* Context activation is done by the caller. */
  76 static void context_clean_fbo_attachments(const struct wined3d_gl_info *gl_info, GLenum target)
  77 {
  78     unsigned int i;
  79
  80     for (i = 0; i < gl_info->limits.buffers; ++i)
  81     {
  82         gl_info->fbo_ops.glFramebufferTexture2D(target, GL_COLOR_ATTACHMENT0 + i, GL_TEXTURE_2D, 0, 0);
  83         checkGLcall("glFramebufferTexture2D()");
  84     }
  85     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  86     checkGLcall("glFramebufferTexture2D()");
  87
  88     gl_info->fbo_ops.glFramebufferTexture2D(target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
  89     checkGLcall("glFramebufferTexture2D()");
  90 }
  91
  92 /* Context activation is done by the caller. */
  93 static void context_destroy_fbo(struct wined3d_context *context, GLuint fbo)
  94 {
  95     const struct wined3d_gl_info *gl_info = context->gl_info;
  96
  97     context_bind_fbo(context, GL_FRAMEBUFFER, fbo);
  98     context_clean_fbo_attachments(gl_info, GL_FRAMEBUFFER);
  99     context_bind_fbo(context, GL_FRAMEBUFFER, 0);
 100
 101     gl_info->fbo_ops.glDeleteFramebuffers(1, &fbo);
 102     checkGLcall("glDeleteFramebuffers()");
 103 }
 104
 105 static void context_attach_depth_stencil_rb(const struct wined3d_gl_info *gl_info,
 106         GLenum fbo_target, DWORD format_flags, GLuint rb)
 107 {
 108     if (format_flags & WINED3DFMT_FLAG_DEPTH)
 109     {
 110         gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rb);
 111         checkGLcall("glFramebufferRenderbuffer()");
 112     }
 113
 114     if (format_flags & WINED3DFMT_FLAG_STENCIL)
 115     {
 116         gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rb);
 117         checkGLcall("glFramebufferRenderbuffer()");
 118     }
 119 }
 120
 121 /* Context activation is done by the caller. */
 122 static void context_attach_depth_stencil_fbo(struct wined3d_context *context,
 123         GLenum fbo_target, struct wined3d_surface *depth_stencil, DWORD location)
 124 {
 125     const struct wined3d_gl_info *gl_info = context->gl_info;
 126
 127     TRACE("Attach depth stencil %p\n", depth_stencil);
 128
 129     if (depth_stencil)
 130     {
 131         DWORD format_flags = depth_stencil->resource.format->flags;
 132
 133         if (depth_stencil->current_renderbuffer)
 134         {
 135             context_attach_depth_stencil_rb(gl_info, fbo_target,
 136                     format_flags, depth_stencil->current_renderbuffer->id);
 137         }
 138         else
 139         {
 140             switch (location)
 141             {
 142                 case WINED3D_LOCATION_TEXTURE_RGB:
 143                 case WINED3D_LOCATION_TEXTURE_SRGB:
 144                     surface_prepare_texture(depth_stencil, context, FALSE);
 145
 146                     if (format_flags & WINED3DFMT_FLAG_DEPTH)
 147                     {
 148                         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT,
 149                                 depth_stencil->texture_target, depth_stencil->container->texture_rgb.name,
 150                                 depth_stencil->texture_level);
 151                         checkGLcall("glFramebufferTexture2D()");
 152                     }
 153
 154                     if (format_flags & WINED3DFMT_FLAG_STENCIL)
 155                     {
 156                         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT,
 157                                 depth_stencil->texture_target, depth_stencil->container->texture_rgb.name,
 158                                 depth_stencil->texture_level);
 159                         checkGLcall("glFramebufferTexture2D()");
 160                     }
 161                     break;
 162
 163                 case WINED3D_LOCATION_RB_MULTISAMPLE:
 164                     surface_prepare_rb(depth_stencil, gl_info, TRUE);
 165                     context_attach_depth_stencil_rb(gl_info, fbo_target,
 166                             format_flags, depth_stencil->rb_multisample);
 167                     break;
 168
 169                 case WINED3D_LOCATION_RB_RESOLVED:
 170                     surface_prepare_rb(depth_stencil, gl_info, FALSE);
 171                     context_attach_depth_stencil_rb(gl_info, fbo_target,
 172                             format_flags, depth_stencil->rb_resolved);
 173                     break;
 174
 175                 default:
 176                     ERR("Unsupported location %s (%#x).\n", wined3d_debug_location(location), location);
 177                     break;
 178             }
 179         }
 180
 181         if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
 182         {
 183             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 184             checkGLcall("glFramebufferTexture2D()");
 185         }
 186
 187         if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
 188         {
 189             gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 190             checkGLcall("glFramebufferTexture2D()");
 191         }
 192     }
 193     else
 194     {
 195         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 196         checkGLcall("glFramebufferTexture2D()");
 197
 198         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
 199         checkGLcall("glFramebufferTexture2D()");
 200     }
 201 }
 202
 203 /* Context activation is done by the caller. */
 204 static void context_attach_surface_fbo(struct wined3d_context *context,
 205         GLenum fbo_target, DWORD idx, struct wined3d_surface *surface, DWORD location)
 206 {
 207     const struct wined3d_gl_info *gl_info = context->gl_info;
 208
 209     TRACE("Attach surface %p to %u\n", surface, idx);
 210
 211     if (surface && surface->resource.format->id != WINED3DFMT_NULL)
 212     {
 213         BOOL srgb;
 214
 215         switch (location)
 216         {
 217             case WINED3D_LOCATION_TEXTURE_RGB:
 218             case WINED3D_LOCATION_TEXTURE_SRGB:
 219                 srgb = location == WINED3D_LOCATION_TEXTURE_SRGB;
 220                 surface_prepare_texture(surface, context, srgb);
 221                 gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 222                         surface->texture_target, surface_get_texture_name(surface, gl_info, srgb),
 223                         surface->texture_level);
 224                 checkGLcall("glFramebufferTexture2D()");
 225                 break;
 226
 227             case WINED3D_LOCATION_RB_MULTISAMPLE:
 228                 surface_prepare_rb(surface, gl_info, TRUE);
 229                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 230                         GL_RENDERBUFFER, surface->rb_multisample);
 231                 checkGLcall("glFramebufferRenderbuffer()");
 232                 break;
 233
 234             case WINED3D_LOCATION_RB_RESOLVED:
 235                 surface_prepare_rb(surface, gl_info, FALSE);
 236                 gl_info->fbo_ops.glFramebufferRenderbuffer(fbo_target, GL_COLOR_ATTACHMENT0 + idx,
 237                         GL_RENDERBUFFER, surface->rb_resolved);
 238                 checkGLcall("glFramebufferRenderbuffer()");
 239                 break;
 240
 241             default:
 242                 ERR("Unsupported location %s (%#x).\n", wined3d_debug_location(location), location);
 243                 break;
 244         }
 245     }
 246     else
 247     {
 248         gl_info->fbo_ops.glFramebufferTexture2D(fbo_target, GL_COLOR_ATTACHMENT0 + idx, GL_TEXTURE_2D, 0, 0);
 249         checkGLcall("glFramebufferTexture2D()");
 250     }
 251 }
 252
 253 /* Context activation is done by the caller. */
 254 void context_check_fbo_status(const struct wined3d_context *context, GLenum target)
 255 {
 256     const struct wined3d_gl_info *gl_info = context->gl_info;
 257     GLenum status;
 258
 259     if (!FIXME_ON(d3d)) return;
 260
 261     status = gl_info->fbo_ops.glCheckFramebufferStatus(target);
 262     if (status == GL_FRAMEBUFFER_COMPLETE)
 263     {
 264         TRACE("FBO complete\n");
 265     }
 266     else
 267     {
 268         const struct wined3d_surface *attachment;
 269         unsigned int i;
 270
 271         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 272
 273         if (!context->current_fbo)
 274         {
 275             ERR("FBO 0 is incomplete, driver bug?\n");
 276             return;
 277         }
 278
 279         FIXME("\tLocation %s (%#x).\n", wined3d_debug_location(context->current_fbo->location),
 280                 context->current_fbo->location);
 281
 282         /* Dump the FBO attachments */
 283         for (i = 0; i < gl_info->limits.buffers; ++i)
 284         {
 285             attachment = context->current_fbo->render_targets[i];
 286             if (attachment)
 287             {
 288                 FIXME("\tColor attachment %d: (%p) %s %ux%u %u samples.\n",
 289                         i, attachment, debug_d3dformat(attachment->resource.format->id),
 290                         attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 291             }
 292         }
 293         attachment = context->current_fbo->depth_stencil;
 294         if (attachment)
 295         {
 296             FIXME("\tDepth attachment: (%p) %s %ux%u %u samples.\n",
 297                     attachment, debug_d3dformat(attachment->resource.format->id),
 298                     attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 299         }
 300     }
 301 }
 302
 303 static inline DWORD context_generate_rt_mask(GLenum buffer)
 304 {
 305     /* Should take care of all the GL_FRONT/GL_BACK/GL_AUXi/GL_NONE... cases */
 306     return buffer ? (1 << 31) | buffer : 0;
 307 }
 308
 309 static inline DWORD context_generate_rt_mask_from_surface(const struct wined3d_surface *target)
 310 {
 311     return (1 << 31) | surface_get_gl_buffer(target);
 312 }
 313
 314 static struct fbo_entry *context_create_fbo_entry(const struct wined3d_context *context,
 315         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 316 {
 317     const struct wined3d_gl_info *gl_info = context->gl_info;
 318     struct fbo_entry *entry;
 319
 320     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 321     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
 322     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 323     entry->depth_stencil = depth_stencil;
 324     entry->location = location;
 325     entry->rt_mask = context_generate_rt_mask(GL_COLOR_ATTACHMENT0);
 326     entry->attached = FALSE;
 327     gl_info->fbo_ops.glGenFramebuffers(1, &entry->id);
 328     checkGLcall("glGenFramebuffers()");
 329     TRACE("Created FBO %u.\n", entry->id);
 330
 331     return entry;
 332 }
 333
 334 /* Context activation is done by the caller. */
 335 static void context_reuse_fbo_entry(struct wined3d_context *context, GLenum target,
 336         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 337         DWORD location, struct fbo_entry *entry)
 338 {
 339     const struct wined3d_gl_info *gl_info = context->gl_info;
 340
 341     context_bind_fbo(context, target, entry->id);
 342     context_clean_fbo_attachments(gl_info, target);
 343
 344     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 345     entry->depth_stencil = depth_stencil;
 346     entry->location = location;
 347     entry->attached = FALSE;
 348 }
 349
 350 /* Context activation is done by the caller. */
 351 static void context_destroy_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 352 {
 353     if (entry->id)
 354     {
 355         TRACE("Destroy FBO %u.\n", entry->id);
 356         context_destroy_fbo(context, entry->id);
 357     }
 358     --context->fbo_entry_count;
 359     list_remove(&entry->entry);
 360     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 361     HeapFree(GetProcessHeap(), 0, entry);
 362 }
 363
 364 /* Context activation is done by the caller. */
 365 static struct fbo_entry *context_find_fbo_entry(struct wined3d_context *context, GLenum target,
 366         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 367 {
 368     const struct wined3d_gl_info *gl_info = context->gl_info;
 369     struct fbo_entry *entry;
 370
 371     if (depth_stencil && render_targets && render_targets[0])
 372     {
 373         if (depth_stencil->resource.width < render_targets[0]->resource.width ||
 374             depth_stencil->resource.height < render_targets[0]->resource.height)
 375         {
 376             WARN("Depth stencil is smaller than the primary color buffer, disabling\n");
 377             depth_stencil = NULL;
 378         }
 379     }
 380
 381     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 382     {
 383         if (!memcmp(entry->render_targets,
 384                 render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
 385                 && entry->depth_stencil == depth_stencil && entry->location == location)
 386         {
 387             list_remove(&entry->entry);
 388             list_add_head(&context->fbo_list, &entry->entry);
 389             return entry;
 390         }
 391     }
 392
 393     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 394     {
 395         entry = context_create_fbo_entry(context, render_targets, depth_stencil, location);
 396         list_add_head(&context->fbo_list, &entry->entry);
 397         ++context->fbo_entry_count;
 398     }
 399     else
 400     {
 401         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 402         context_reuse_fbo_entry(context, target, render_targets, depth_stencil, location, entry);
 403         list_remove(&entry->entry);
 404         list_add_head(&context->fbo_list, &entry->entry);
 405     }
 406
 407     return entry;
 408 }
 409
 410 /* Context activation is done by the caller. */
 411 static void context_apply_fbo_entry(struct wined3d_context *context, GLenum target, struct fbo_entry *entry)
 412 {
 413     const struct wined3d_gl_info *gl_info = context->gl_info;
 414     unsigned int i;
 415     GLuint read_binding, draw_binding;
 416
 417     if (entry->attached)
 418     {
 419         context_bind_fbo(context, target, entry->id);
 420         return;
 421     }
 422
 423     read_binding = context->fbo_read_binding;
 424     draw_binding = context->fbo_draw_binding;
 425     context_bind_fbo(context, GL_FRAMEBUFFER, entry->id);
 426
 427     /* Apply render targets */
 428     for (i = 0; i < gl_info->limits.buffers; ++i)
 429     {
 430         context_attach_surface_fbo(context, target, i, entry->render_targets[i], entry->location);
 431     }
 432
 433     /* Apply depth targets */
 434     if (entry->depth_stencil)
 435         surface_set_compatible_renderbuffer(entry->depth_stencil, entry->render_targets[0]);
 436     context_attach_depth_stencil_fbo(context, target, entry->depth_stencil, entry->location);
 437
 438     /* Set valid read and draw buffer bindings to satisfy pedantic pre-ES2_compatibility
 439      * GL contexts requirements. */
 440     glReadBuffer(GL_NONE);
 441     context_set_draw_buffer(context, GL_NONE);
 442     if (target != GL_FRAMEBUFFER)
 443     {
 444         if (target == GL_READ_FRAMEBUFFER)
 445             context_bind_fbo(context, GL_DRAW_FRAMEBUFFER, draw_binding);
 446         else
 447             context_bind_fbo(context, GL_READ_FRAMEBUFFER, read_binding);
 448     }
 449
 450     entry->attached = TRUE;
 451 }
 452
 453 /* Context activation is done by the caller. */
 454 static void context_apply_fbo_state(struct wined3d_context *context, GLenum target,
 455         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil, DWORD location)
 456 {
 457     struct fbo_entry *entry, *entry2;
 458
 459     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 460     {
 461         context_destroy_fbo_entry(context, entry);
 462     }
 463
 464     if (context->rebind_fbo)
 465     {
 466         context_bind_fbo(context, GL_FRAMEBUFFER, 0);
 467         context->rebind_fbo = FALSE;
 468     }
 469
 470     if (location == WINED3D_LOCATION_DRAWABLE)
 471     {
 472         context->current_fbo = NULL;
 473         context_bind_fbo(context, target, 0);
 474     }
 475     else
 476     {
 477         context->current_fbo = context_find_fbo_entry(context, target, render_targets, depth_stencil, location);
 478         context_apply_fbo_entry(context, target, context->current_fbo);
 479     }
 480 }
 481
 482 /* Context activation is done by the caller. */
 483 void context_apply_fbo_state_blit(struct wined3d_context *context, GLenum target,
 484         struct wined3d_surface *render_target, struct wined3d_surface *depth_stencil, DWORD location)
 485 {
 486     UINT clear_size = (context->gl_info->limits.buffers - 1) * sizeof(*context->blit_targets);
 487
 488     context->blit_targets[0] = render_target;
 489     if (clear_size)
 490         memset(&context->blit_targets[1], 0, clear_size);
 491     context_apply_fbo_state(context, target, context->blit_targets, depth_stencil, location);
 492 }
 493
 494 /* Context activation is done by the caller. */
 495 void context_alloc_occlusion_query(struct wined3d_context *context, struct wined3d_occlusion_query *query)
 496 {
 497     const struct wined3d_gl_info *gl_info = context->gl_info;
 498
 499     if (context->free_occlusion_query_count)
 500     {
 501         query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
 502     }
 503     else
 504     {
 505         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 506         {
 507             GL_EXTCALL(glGenQueriesARB(1, &query->id));
 508             checkGLcall("glGenQueriesARB");
 509
 510             TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
 511         }
 512         else
 513         {
 514             WARN("Occlusion queries not supported, not allocating query id.\n");
 515             query->id = 0;
 516         }
 517     }
 518
 519     query->context = context;
 520     list_add_head(&context->occlusion_queries, &query->entry);
 521 }
 522
 523 void context_free_occlusion_query(struct wined3d_occlusion_query *query)
 524 {
 525     struct wined3d_context *context = query->context;
 526
 527     list_remove(&query->entry);
 528     query->context = NULL;
 529
 530     if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
 531     {
 532         UINT new_size = context->free_occlusion_query_size << 1;
 533         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
 534                 new_size * sizeof(*context->free_occlusion_queries));
 535
 536         if (!new_data)
 537         {
 538             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 539             return;
 540         }
 541
 542         context->free_occlusion_query_size = new_size;
 543         context->free_occlusion_queries = new_data;
 544     }
 545
 546     context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
 547 }
 548
 549 /* Context activation is done by the caller. */
 550 void context_alloc_event_query(struct wined3d_context *context, struct wined3d_event_query *query)
 551 {
 552     const struct wined3d_gl_info *gl_info = context->gl_info;
 553
 554     if (context->free_event_query_count)
 555     {
 556         query->object = context->free_event_queries[--context->free_event_query_count];
 557     }
 558     else
 559     {
 560         if (gl_info->supported[ARB_SYNC])
 561         {
 562             /* Using ARB_sync, not much to do here. */
 563             query->object.sync = NULL;
 564             TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
 565         }
 566         else if (gl_info->supported[APPLE_FENCE])
 567         {
 568             GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
 569             checkGLcall("glGenFencesAPPLE");
 570
 571             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 572         }
 573         else if(gl_info->supported[NV_FENCE])
 574         {
 575             GL_EXTCALL(glGenFencesNV(1, &query->object.id));
 576             checkGLcall("glGenFencesNV");
 577
 578             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 579         }
 580         else
 581         {
 582             WARN("Event queries not supported, not allocating query id.\n");
 583             query->object.id = 0;
 584         }
 585     }
 586
 587     query->context = context;
 588     list_add_head(&context->event_queries, &query->entry);
 589 }
 590
 591 void context_free_event_query(struct wined3d_event_query *query)
 592 {
 593     struct wined3d_context *context = query->context;
 594
 595     list_remove(&query->entry);
 596     query->context = NULL;
 597
 598     if (context->free_event_query_count >= context->free_event_query_size - 1)
 599     {
 600         UINT new_size = context->free_event_query_size << 1;
 601         union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
 602                 new_size * sizeof(*context->free_event_queries));
 603
 604         if (!new_data)
 605         {
 606             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
 607             return;
 608         }
 609
 610         context->free_event_query_size = new_size;
 611         context->free_event_queries = new_data;
 612     }
 613
 614     context->free_event_queries[context->free_event_query_count++] = query->object;
 615 }
 616
 617 typedef void (context_fbo_entry_func_t)(struct wined3d_context *context, struct fbo_entry *entry);
 618
 619 static void context_enum_surface_fbo_entries(const struct wined3d_device *device,
 620         const struct wined3d_surface *surface, context_fbo_entry_func_t *callback)
 621 {
 622     UINT i;
 623
 624     for (i = 0; i < device->context_count; ++i)
 625     {
 626         struct wined3d_context *context = device->contexts[i];
 627         const struct wined3d_gl_info *gl_info = context->gl_info;
 628         struct fbo_entry *entry, *entry2;
 629
 630         if (context->current_rt == surface) context->current_rt = NULL;
 631
 632         LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 633         {
 634             UINT j;
 635
 636             if (entry->depth_stencil == surface)
 637             {
 638                 callback(context, entry);
 639                 continue;
 640             }
 641
 642             for (j = 0; j < gl_info->limits.buffers; ++j)
 643             {
 644                 if (entry->render_targets[j] == surface)
 645                 {
 646                     callback(context, entry);
 647                     break;
 648                 }
 649             }
 650         }
 651     }
 652 }
 653
 654 static void context_queue_fbo_entry_destruction(struct wined3d_context *context, struct fbo_entry *entry)
 655 {
 656     list_remove(&entry->entry);
 657     list_add_head(&context->fbo_destroy_list, &entry->entry);
 658 }
 659
 660 void context_resource_released(const struct wined3d_device *device,
 661         struct wined3d_resource *resource, enum wined3d_resource_type type)
 662 {
 663     if (!device->d3d_initialized) return;
 664
 665     switch (type)
 666     {
 667         case WINED3D_RTYPE_SURFACE:
 668             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 669                     context_queue_fbo_entry_destruction);
 670             break;
 671
 672         default:
 673             break;
 674     }
 675 }
 676
 677 static void context_detach_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 678 {
 679     entry->attached = FALSE;
 680 }
 681
 682 void context_resource_unloaded(const struct wined3d_device *device,
 683         struct wined3d_resource *resource, enum wined3d_resource_type type)
 684 {
 685     switch (type)
 686     {
 687         case WINED3D_RTYPE_SURFACE:
 688             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 689                     context_detach_fbo_entry);
 690             break;
 691
 692         default:
 693             break;
 694     }
 695 }
 696
 697 void context_surface_update(struct wined3d_context *context, const struct wined3d_surface *surface)
 698 {
 699     const struct wined3d_gl_info *gl_info = context->gl_info;
 700     struct fbo_entry *entry = context->current_fbo;
 701     unsigned int i;
 702
 703     if (!entry || context->rebind_fbo) return;
 704
 705     for (i = 0; i < gl_info->limits.buffers; ++i)
 706     {
 707         if (surface == entry->render_targets[i])
 708         {
 709             TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
 710             context->rebind_fbo = TRUE;
 711             return;
 712         }
 713     }
 714
 715     if (surface == entry->depth_stencil)
 716     {
 717         TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
 718         context->rebind_fbo = TRUE;
 719     }
 720 }
 721
 722 static void context_restore_pixel_format(struct wined3d_context *ctx)
 723 {
 724     const struct wined3d_gl_info *gl_info = ctx->gl_info;
 725
 726     if (ctx->restore_pf && IsWindow(ctx->restore_pf_win))
 727     {
 728         if (ctx->gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 729         {
 730             HDC dc = GetDC(ctx->restore_pf_win);
 731             if (dc)
 732             {
 733                 if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, ctx->restore_pf)))
 734                 {
 735                     ERR("wglSetPixelFormatWINE failed to restore pixel format %d on window %p.\n",
 736                             ctx->restore_pf, ctx->restore_pf_win);
 737                 }
 738                 ReleaseDC(ctx->restore_pf_win, dc);
 739             }
 740         }
 741         else
 742         {
 743             ERR("can't restore pixel format %d on window %p\n", ctx->restore_pf, ctx->restore_pf_win);
 744         }
 745     }
 746
 747     ctx->restore_pf = 0;
 748     ctx->restore_pf_win = NULL;
 749 }
 750
 751 static BOOL context_set_pixel_format(struct wined3d_context *context, HDC dc, int format)
 752 {
 753     const struct wined3d_gl_info *gl_info = context->gl_info;
 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             /* This may also happen if the dc belongs to a destroyed window. */
 763             WARN("Failed to set pixel format %d on device context %p, last error %#x.\n",
 764                     format, dc, GetLastError());
 765             return FALSE;
 766         }
 767
 768         context->restore_pf = 0;
 769         context->restore_pf_win = WindowFromDC(dc);
 770         return TRUE;
 771     }
 772
 773     /* By default WGL doesn't allow pixel format adjustments but we need it
 774      * here. For this reason there's a Wine specific wglSetPixelFormat()
 775      * which allows us to set the pixel format multiple times. Only use it
 776      * when really needed. */
 777     if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 778     {
 779         HWND win;
 780
 781         if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format)))
 782         {
 783             ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
 784                     format, dc);
 785             return FALSE;
 786         }
 787
 788         win = WindowFromDC(dc);
 789         if (win != context->restore_pf_win)
 790         {
 791             context_restore_pixel_format(context);
 792
 793             context->restore_pf = current;
 794             context->restore_pf_win = win;
 795         }
 796
 797         return TRUE;
 798     }
 799
 800     /* OpenGL doesn't allow pixel format adjustments. Print an error and
 801      * continue using the old format. There's a big chance that the old
 802      * format works although with a performance hit and perhaps rendering
 803      * errors. */
 804     ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
 805             format, dc, current);
 806     return TRUE;
 807 }
 808
 809 static BOOL context_set_gl_context(struct wined3d_context *ctx)
 810 {
 811     struct wined3d_swapchain *swapchain = ctx->swapchain;
 812     BOOL backup = FALSE;
 813
 814     if (!context_set_pixel_format(ctx, ctx->hdc, ctx->pixel_format))
 815     {
 816         WARN("Failed to set pixel format %d on device context %p.\n",
 817                 ctx->pixel_format, ctx->hdc);
 818         backup = TRUE;
 819     }
 820
 821     if (backup || !wglMakeCurrent(ctx->hdc, ctx->glCtx))
 822     {
 823         HDC dc;
 824
 825         WARN("Failed to make GL context %p current on device context %p, last error %#x.\n",
 826                 ctx->glCtx, ctx->hdc, GetLastError());
 827         ctx->valid = 0;
 828         WARN("Trying fallback to the backup window.\n");
 829
 830         /* FIXME: If the context is destroyed it's no longer associated with
 831          * a swapchain, so we can't use the swapchain to get a backup dc. To
 832          * make this work windowless contexts would need to be handled by the
 833          * device. */
 834         if (ctx->destroyed)
 835         {
 836             FIXME("Unable to get backup dc for destroyed context %p.\n", ctx);
 837             context_set_current(NULL);
 838             return FALSE;
 839         }
 840
 841         if (!(dc = swapchain_get_backup_dc(swapchain)))
 842         {
 843             context_set_current(NULL);
 844             return FALSE;
 845         }
 846
 847         if (!context_set_pixel_format(ctx, dc, ctx->pixel_format))
 848         {
 849             ERR("Failed to set pixel format %d on device context %p.\n",
 850                     ctx->pixel_format, dc);
 851             context_set_current(NULL);
 852             return FALSE;
 853         }
 854
 855         if (!wglMakeCurrent(dc, ctx->glCtx))
 856         {
 857             ERR("Fallback to backup window (dc %p) failed too, last error %#x.\n",
 858                     dc, GetLastError());
 859             context_set_current(NULL);
 860             return FALSE;
 861         }
 862
 863         ctx->valid = 1;
 864     }
 865     ctx->needs_set = 0;
 866     return TRUE;
 867 }
 868
 869 static void context_restore_gl_context(const struct wined3d_gl_info *gl_info, HDC dc, HGLRC gl_ctx)
 870 {
 871     if (!wglMakeCurrent(dc, gl_ctx))
 872     {
 873         ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 874                 gl_ctx, dc, GetLastError());
 875         context_set_current(NULL);
 876     }
 877 }
 878
 879 static void context_update_window(struct wined3d_context *context)
 880 {
 881     if (context->win_handle == context->swapchain->win_handle)
 882         return;
 883
 884     TRACE("Updating context %p window from %p to %p.\n",
 885             context, context->win_handle, context->swapchain->win_handle);
 886
 887     if (context->hdc)
 888         wined3d_release_dc(context->win_handle, context->hdc);
 889
 890     context->win_handle = context->swapchain->win_handle;
 891     context->needs_set = 1;
 892     context->valid = 1;
 893
 894     if (!(context->hdc = GetDC(context->win_handle)))
 895     {
 896         ERR("Failed to get a device context for window %p.\n", context->win_handle);
 897         context->valid = 0;
 898     }
 899 }
 900
 901 static void context_destroy_gl_resources(struct wined3d_context *context)
 902 {
 903     const struct wined3d_gl_info *gl_info = context->gl_info;
 904     struct wined3d_occlusion_query *occlusion_query;
 905     struct wined3d_event_query *event_query;
 906     struct fbo_entry *entry, *entry2;
 907     HGLRC restore_ctx;
 908     HDC restore_dc;
 909     unsigned int i;
 910
 911     restore_ctx = wglGetCurrentContext();
 912     restore_dc = wglGetCurrentDC();
 913
 914     if (restore_ctx == context->glCtx)
 915         restore_ctx = NULL;
 916     else if (context->valid)
 917         context_set_gl_context(context);
 918
 919     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
 920     {
 921         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
 922             GL_EXTCALL(glDeleteQueriesARB(1, &occlusion_query->id));
 923         occlusion_query->context = NULL;
 924     }
 925
 926     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
 927     {
 928         if (context->valid)
 929         {
 930             if (gl_info->supported[ARB_SYNC])
 931             {
 932                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
 933             }
 934             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
 935             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
 936         }
 937         event_query->context = NULL;
 938     }
 939
 940     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 941     {
 942         if (!context->valid) entry->id = 0;
 943         context_destroy_fbo_entry(context, entry);
 944     }
 945
 946     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 947     {
 948         if (!context->valid) entry->id = 0;
 949         context_destroy_fbo_entry(context, entry);
 950     }
 951
 952     if (context->valid)
 953     {
 954         if (context->dummy_arbfp_prog)
 955         {
 956             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
 957         }
 958
 959         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 960             GL_EXTCALL(glDeleteQueriesARB(context->free_occlusion_query_count, context->free_occlusion_queries));
 961
 962         if (gl_info->supported[ARB_SYNC])
 963         {
 964             for (i = 0; i < context->free_event_query_count; ++i)
 965             {
 966                 GL_EXTCALL(glDeleteSync(context->free_event_queries[i].sync));
 967             }
 968         }
 969         else if (gl_info->supported[APPLE_FENCE])
 970         {
 971             for (i = 0; i < context->free_event_query_count; ++i)
 972             {
 973                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
 974             }
 975         }
 976         else if (gl_info->supported[NV_FENCE])
 977         {
 978             for (i = 0; i < context->free_event_query_count; ++i)
 979             {
 980                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
 981             }
 982         }
 983
 984         checkGLcall("context cleanup");
 985     }
 986
 987     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
 988     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
 989
 990     context_restore_pixel_format(context);
 991     if (restore_ctx)
 992     {
 993         context_restore_gl_context(gl_info, restore_dc, restore_ctx);
 994     }
 995     else if (wglGetCurrentContext() && !wglMakeCurrent(NULL, NULL))
 996     {
 997         ERR("Failed to disable GL context.\n");
 998     }
 999
1000     wined3d_release_dc(context->win_handle, context->hdc);
1001
1002     if (!wglDeleteContext(context->glCtx))
1003     {
1004         DWORD err = GetLastError();
1005         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
1006     }
1007 }
1008
1009 DWORD context_get_tls_idx(void)
1010 {
1011     return wined3d_context_tls_idx;
1012 }
1013
1014 void context_set_tls_idx(DWORD idx)
1015 {
1016     wined3d_context_tls_idx = idx;
1017 }
1018
1019 struct wined3d_context *context_get_current(void)
1020 {
1021     return TlsGetValue(wined3d_context_tls_idx);
1022 }
1023
1024 BOOL context_set_current(struct wined3d_context *ctx)
1025 {
1026     struct wined3d_context *old = context_get_current();
1027
1028     if (old == ctx)
1029     {
1030         TRACE("Already using D3D context %p.\n", ctx);
1031         return TRUE;
1032     }
1033
1034     if (old)
1035     {
1036         if (old->destroyed)
1037         {
1038             TRACE("Switching away from destroyed context %p.\n", old);
1039             context_destroy_gl_resources(old);
1040             HeapFree(GetProcessHeap(), 0, (void *)old->gl_info);
1041             HeapFree(GetProcessHeap(), 0, old);
1042         }
1043         else
1044         {
1045             old->current = 0;
1046         }
1047     }
1048
1049     if (ctx)
1050     {
1051         if (!ctx->valid)
1052         {
1053             ERR("Trying to make invalid context %p current\n", ctx);
1054             return FALSE;
1055         }
1056
1057         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1058         if (!context_set_gl_context(ctx))
1059             return FALSE;
1060         ctx->current = 1;
1061     }
1062     else if(wglGetCurrentContext())
1063     {
1064         TRACE("Clearing current D3D context.\n");
1065         if (!wglMakeCurrent(NULL, NULL))
1066         {
1067             DWORD err = GetLastError();
1068             ERR("Failed to clear current GL context, last error %#x.\n", err);
1069             TlsSetValue(wined3d_context_tls_idx, NULL);
1070             return FALSE;
1071         }
1072     }
1073
1074     return TlsSetValue(wined3d_context_tls_idx, ctx);
1075 }
1076
1077 void context_release(struct wined3d_context *context)
1078 {
1079     TRACE("Releasing context %p, level %u.\n", context, context->level);
1080
1081     if (WARN_ON(d3d))
1082     {
1083         if (!context->level)
1084             WARN("Context %p is not active.\n", context);
1085         else if (context != context_get_current())
1086             WARN("Context %p is not the current context.\n", context);
1087     }
1088
1089     if (!--context->level)
1090     {
1091         context_restore_pixel_format(context);
1092         if (context->restore_ctx)
1093         {
1094             TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1095             context_restore_gl_context(context->gl_info, context->restore_dc, context->restore_ctx);
1096             context->restore_ctx = NULL;
1097             context->restore_dc = NULL;
1098         }
1099     }
1100 }
1101
1102 static void context_enter(struct wined3d_context *context)
1103 {
1104     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1105
1106     if (!context->level++)
1107     {
1108         const struct wined3d_context *current_context = context_get_current();
1109         HGLRC current_gl = wglGetCurrentContext();
1110
1111         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1112         {
1113             TRACE("Another GL context (%p on device context %p) is already current.\n",
1114                     current_gl, wglGetCurrentDC());
1115             context->restore_ctx = current_gl;
1116             context->restore_dc = wglGetCurrentDC();
1117             context->needs_set = 1;
1118         }
1119         else if (!context->needs_set && context->pixel_format != GetPixelFormat(context->hdc))
1120             context->needs_set = 1;
1121     }
1122 }
1123
1124 void context_invalidate_state(struct wined3d_context *context, DWORD state)
1125 {
1126     DWORD rep = context->state_table[state].representative;
1127     DWORD idx;
1128     BYTE shift;
1129
1130     if (isStateDirty(context, rep)) return;
1131
1132     context->dirtyArray[context->numDirtyEntries++] = rep;
1133     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1134     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1135     context->isStateDirty[idx] |= (1 << shift);
1136 }
1137
1138 /* This function takes care of wined3d pixel format selection. */
1139 static int context_choose_pixel_format(const struct wined3d_device *device, HDC hdc,
1140         const struct wined3d_format *color_format, const struct wined3d_format *ds_format,
1141         BOOL auxBuffers, BOOL findCompatible)
1142 {
1143     int iPixelFormat=0;
1144     BYTE redBits, greenBits, blueBits, alphaBits, colorBits;
1145     BYTE depthBits=0, stencilBits=0;
1146     unsigned int current_value;
1147     unsigned int cfg_count = device->adapter->cfg_count;
1148     unsigned int i;
1149
1150     TRACE("device %p, dc %p, color_format %s, ds_format %s, aux_buffers %#x, find_compatible %#x.\n",
1151             device, hdc, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id),
1152             auxBuffers, findCompatible);
1153
1154     if (!getColorBits(color_format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1155     {
1156         ERR("Unable to get color bits for format %s (%#x)!\n",
1157                 debug_d3dformat(color_format->id), color_format->id);
1158         return 0;
1159     }
1160
1161     getDepthStencilBits(ds_format, &depthBits, &stencilBits);
1162
1163     current_value = 0;
1164     for (i = 0; i < cfg_count; ++i)
1165     {
1166         const struct wined3d_pixel_format *cfg = &device->adapter->cfgs[i];
1167         unsigned int value;
1168
1169         /* For now only accept RGBA formats. Perhaps some day we will
1170          * allow floating point formats for pbuffers. */
1171         if (cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1172             continue;
1173         /* In window mode we need a window drawable format and double buffering. */
1174         if (!(cfg->windowDrawable && cfg->doubleBuffer))
1175             continue;
1176         if (cfg->redSize < redBits)
1177             continue;
1178         if (cfg->greenSize < greenBits)
1179             continue;
1180         if (cfg->blueSize < blueBits)
1181             continue;
1182         if (cfg->alphaSize < alphaBits)
1183             continue;
1184         if (cfg->depthSize < depthBits)
1185             continue;
1186         if (stencilBits && cfg->stencilSize != stencilBits)
1187             continue;
1188         /* Check multisampling support. */
1189         if (cfg->numSamples)
1190             continue;
1191
1192         value = 1;
1193         /* We try to locate a format which matches our requirements exactly. In case of
1194          * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1195         if (cfg->depthSize == depthBits)
1196             value += 1;
1197         if (cfg->stencilSize == stencilBits)
1198             value += 2;
1199         if (cfg->alphaSize == alphaBits)
1200             value += 4;
1201         /* We like to have aux buffers in backbuffer mode */
1202         if (auxBuffers && cfg->auxBuffers)
1203             value += 8;
1204         if (cfg->redSize == redBits
1205                 && cfg->greenSize == greenBits
1206                 && cfg->blueSize == blueBits)
1207             value += 16;
1208
1209         if (value > current_value)
1210         {
1211             iPixelFormat = cfg->iPixelFormat;
1212             current_value = value;
1213         }
1214     }
1215
1216     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1217     if(!iPixelFormat && !findCompatible) {
1218         ERR("Can't find a suitable iPixelFormat\n");
1219         return FALSE;
1220     } else if(!iPixelFormat) {
1221         PIXELFORMATDESCRIPTOR pfd;
1222
1223         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1224         /* PixelFormat selection */
1225         ZeroMemory(&pfd, sizeof(pfd));
1226         pfd.nSize      = sizeof(pfd);
1227         pfd.nVersion   = 1;
1228         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1229         pfd.iPixelType = PFD_TYPE_RGBA;
1230         pfd.cAlphaBits = alphaBits;
1231         pfd.cColorBits = colorBits;
1232         pfd.cDepthBits = depthBits;
1233         pfd.cStencilBits = stencilBits;
1234         pfd.iLayerType = PFD_MAIN_PLANE;
1235
1236         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1237         if(!iPixelFormat) {
1238             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1239             ERR("Can't find a suitable iPixelFormat\n");
1240             return FALSE;
1241         }
1242     }
1243
1244     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1245             iPixelFormat, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id));
1246     return iPixelFormat;
1247 }
1248
1249 /* Context activation is done by the caller. */
1250 static void bind_dummy_textures(const struct wined3d_device *device, const struct wined3d_context *context)
1251 {
1252     const struct wined3d_gl_info *gl_info = context->gl_info;
1253     unsigned int i, count = min(MAX_COMBINED_SAMPLERS, gl_info->limits.combined_samplers);
1254
1255     for (i = 0; i < count; ++i)
1256     {
1257         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1258         checkGLcall("glActiveTextureARB");
1259
1260         gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[i]);
1261         checkGLcall("glBindTexture");
1262
1263         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1264         {
1265             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[i]);
1266             checkGLcall("glBindTexture");
1267         }
1268
1269         if (gl_info->supported[EXT_TEXTURE3D])
1270         {
1271             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[i]);
1272             checkGLcall("glBindTexture");
1273         }
1274
1275         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1276         {
1277             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[i]);
1278             checkGLcall("glBindTexture");
1279         }
1280     }
1281 }
1282
1283 BOOL context_debug_output_enabled(const struct wined3d_gl_info *gl_info)
1284 {
1285     return gl_info->supported[ARB_DEBUG_OUTPUT]
1286             && (ERR_ON(d3d) || FIXME_ON(d3d) || WARN_ON(d3d_perf));
1287 }
1288
1289 static void WINE_GLAPI wined3d_debug_callback(GLenum source, GLenum type, GLuint id,
1290         GLenum severity, GLsizei length, const char *message, void *ctx)
1291 {
1292     switch (type)
1293     {
1294         case GL_DEBUG_TYPE_ERROR_ARB:
1295             ERR("%p: %s.\n", ctx, debugstr_an(message, length));
1296             break;
1297
1298         case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB:
1299         case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB:
1300         case GL_DEBUG_TYPE_PORTABILITY_ARB:
1301             FIXME("%p: %s.\n", ctx, debugstr_an(message, length));
1302             break;
1303
1304         case GL_DEBUG_TYPE_PERFORMANCE_ARB:
1305             WARN_(d3d_perf)("%p: %s.\n", ctx, debugstr_an(message, length));
1306             break;
1307
1308         default:
1309             FIXME("ctx %p, type %#x: %s.\n", ctx, type, debugstr_an(message, length));
1310             break;
1311     }
1312 }
1313
1314 struct wined3d_context *context_create(struct wined3d_swapchain *swapchain,
1315         struct wined3d_surface *target, const struct wined3d_format *ds_format)
1316 {
1317     struct wined3d_device *device = swapchain->device;
1318     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1319     const struct wined3d_format *color_format;
1320     struct wined3d_context *ret;
1321     BOOL auxBuffers = FALSE;
1322     HGLRC ctx, share_ctx;
1323     int pixel_format;
1324     unsigned int s;
1325     int swap_interval;
1326     DWORD state;
1327     HDC hdc;
1328
1329     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1330
1331     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1332     if (!ret)
1333         return NULL;
1334
1335     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1336             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1337     if (!ret->blit_targets)
1338         goto out;
1339
1340     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1341             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1342     if (!ret->draw_buffers)
1343         goto out;
1344
1345     ret->free_occlusion_query_size = 4;
1346     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1347             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1348     if (!ret->free_occlusion_queries)
1349         goto out;
1350
1351     list_init(&ret->occlusion_queries);
1352
1353     ret->free_event_query_size = 4;
1354     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1355             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1356     if (!ret->free_event_queries)
1357         goto out;
1358
1359     list_init(&ret->event_queries);
1360     list_init(&ret->fbo_list);
1361     list_init(&ret->fbo_destroy_list);
1362
1363     if (!device->shader_backend->shader_allocate_context_data(ret))
1364     {
1365         ERR("Failed to allocate shader backend context data.\n");
1366         goto out;
1367     }
1368
1369     /* Initialize the texture unit mapping to a 1:1 mapping */
1370     for (s = 0; s < MAX_COMBINED_SAMPLERS; ++s)
1371     {
1372         if (s < gl_info->limits.fragment_samplers)
1373         {
1374             ret->tex_unit_map[s] = s;
1375             ret->rev_tex_unit_map[s] = s;
1376         }
1377         else
1378         {
1379             ret->tex_unit_map[s] = WINED3D_UNMAPPED_STAGE;
1380             ret->rev_tex_unit_map[s] = WINED3D_UNMAPPED_STAGE;
1381         }
1382     }
1383
1384     if (!(hdc = GetDC(swapchain->win_handle)))
1385     {
1386         WARN("Failed to retireve device context, trying swapchain backup.\n");
1387
1388         if (!(hdc = swapchain_get_backup_dc(swapchain)))
1389         {
1390             ERR("Failed to retrieve a device context.\n");
1391             goto out;
1392         }
1393     }
1394
1395     color_format = target->resource.format;
1396
1397     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1398      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1399     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1400     {
1401         auxBuffers = TRUE;
1402
1403         if (color_format->id == WINED3DFMT_B4G4R4X4_UNORM)
1404             color_format = wined3d_get_format(gl_info, WINED3DFMT_B4G4R4A4_UNORM);
1405         else if (color_format->id == WINED3DFMT_B8G8R8X8_UNORM)
1406             color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1407     }
1408
1409     /* DirectDraw supports 8bit paletted render targets and these are used by
1410      * old games like StarCraft and C&C. Most modern hardware doesn't support
1411      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1412      * conversion (ab)uses the alpha component for storing the palette index.
1413      * For this reason we require a format with 8bit alpha, so request
1414      * A8R8G8B8. */
1415     if (color_format->id == WINED3DFMT_P8_UINT)
1416         color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1417
1418     /* Try to find a pixel format which matches our requirements. */
1419     pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, FALSE);
1420
1421     /* Try to locate a compatible format if we weren't able to find anything. */
1422     if (!pixel_format)
1423     {
1424         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1425         pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, TRUE);
1426     }
1427
1428     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1429     if (!pixel_format)
1430     {
1431         ERR("Can't find a suitable pixel format.\n");
1432         goto out;
1433     }
1434
1435     context_enter(ret);
1436
1437     ret->gl_info = gl_info;
1438
1439     if (!context_set_pixel_format(ret, hdc, pixel_format))
1440     {
1441         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1442         context_release(ret);
1443         goto out;
1444     }
1445
1446     share_ctx = device->context_count ? device->contexts[0]->glCtx : NULL;
1447     if (gl_info->p_wglCreateContextAttribsARB)
1448     {
1449         unsigned int ctx_attrib_idx = 0;
1450         GLint ctx_attribs[3];
1451
1452         if (context_debug_output_enabled(gl_info))
1453         {
1454             ctx_attribs[ctx_attrib_idx++] = WGL_CONTEXT_FLAGS_ARB;
1455             ctx_attribs[ctx_attrib_idx++] = WGL_CONTEXT_DEBUG_BIT_ARB;
1456         }
1457         ctx_attribs[ctx_attrib_idx] = 0;
1458
1459         if (!(ctx = gl_info->p_wglCreateContextAttribsARB(hdc, share_ctx, ctx_attribs)))
1460         {
1461             ERR("Failed to create a WGL context.\n");
1462             context_release(ret);
1463             goto out;
1464         }
1465     }
1466     else
1467     {
1468         if (!(ctx = wglCreateContext(hdc)))
1469         {
1470             ERR("Failed to create a WGL context.\n");
1471             context_release(ret);
1472             goto out;
1473         }
1474
1475         if (share_ctx && !wglShareLists(share_ctx, ctx))
1476         {
1477             ERR("wglShareLists(%p, %p) failed, last error %#x.\n", share_ctx, ctx, GetLastError());
1478             context_release(ret);
1479             if (!wglDeleteContext(ctx))
1480                 ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1481             goto out;
1482         }
1483     }
1484
1485     if (!device_context_add(device, ret))
1486     {
1487         ERR("Failed to add the newly created context to the context list\n");
1488         context_release(ret);
1489         if (!wglDeleteContext(ctx))
1490             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1491         goto out;
1492     }
1493
1494     ret->d3d_info = &device->adapter->d3d_info;
1495     ret->state_table = device->StateTable;
1496
1497     /* Mark all states dirty to force a proper initialization of the states
1498      * on the first use of the context. */
1499     for (state = 0; state <= STATE_HIGHEST; ++state)
1500     {
1501         if (ret->state_table[state].representative)
1502             context_invalidate_state(ret, state);
1503     }
1504
1505     ret->swapchain = swapchain;
1506     ret->current_rt = target;
1507     ret->tid = GetCurrentThreadId();
1508
1509     ret->render_offscreen = surface_is_offscreen(target);
1510     ret->draw_buffers_mask = context_generate_rt_mask(GL_BACK);
1511     ret->valid = 1;
1512
1513     ret->glCtx = ctx;
1514     ret->win_handle = swapchain->win_handle;
1515     ret->hdc = hdc;
1516     ret->pixel_format = pixel_format;
1517     ret->needs_set = 1;
1518
1519     /* Set up the context defaults */
1520     if (!context_set_current(ret))
1521     {
1522         ERR("Cannot activate context to set up defaults.\n");
1523         device_context_remove(device, ret);
1524         context_release(ret);
1525         if (!wglDeleteContext(ctx))
1526             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1527         goto out;
1528     }
1529
1530     if (context_debug_output_enabled(gl_info))
1531     {
1532         GL_EXTCALL(glDebugMessageCallbackARB(wined3d_debug_callback, ret));
1533         if (TRACE_ON(d3d_synchronous))
1534             gl_info->gl_ops.gl.p_glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1535         GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_FALSE));
1536         if (ERR_ON(d3d))
1537         {
1538             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_ERROR_ARB,
1539                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1540         }
1541         if (FIXME_ON(d3d))
1542         {
1543             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB,
1544                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1545             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB,
1546                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1547             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_PORTABILITY_ARB,
1548                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1549         }
1550         if (WARN_ON(d3d_perf))
1551         {
1552             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_PERFORMANCE_ARB,
1553                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1554         }
1555     }
1556
1557     switch (swapchain->desc.swap_interval)
1558     {
1559         case WINED3DPRESENT_INTERVAL_IMMEDIATE:
1560             swap_interval = 0;
1561             break;
1562         case WINED3DPRESENT_INTERVAL_DEFAULT:
1563         case WINED3DPRESENT_INTERVAL_ONE:
1564             swap_interval = 1;
1565             break;
1566         case WINED3DPRESENT_INTERVAL_TWO:
1567             swap_interval = 2;
1568             break;
1569         case WINED3DPRESENT_INTERVAL_THREE:
1570             swap_interval = 3;
1571             break;
1572         case WINED3DPRESENT_INTERVAL_FOUR:
1573             swap_interval = 4;
1574             break;
1575         default:
1576             FIXME("Unknown swap interval %#x.\n", swapchain->desc.swap_interval);
1577             swap_interval = 1;
1578     }
1579
1580     if (gl_info->supported[WGL_EXT_SWAP_CONTROL])
1581     {
1582         if (!GL_EXTCALL(wglSwapIntervalEXT(swap_interval)))
1583             ERR("wglSwapIntervalEXT failed to set swap interval %d for context %p, last error %#x\n",
1584                 swap_interval, ret, GetLastError());
1585     }
1586
1587     gl_info->gl_ops.gl.p_glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1588
1589     TRACE("Setting up the screen\n");
1590
1591     gl_info->gl_ops.gl.p_glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1592     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1593
1594     gl_info->gl_ops.gl.p_glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1595     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1596
1597     gl_info->gl_ops.gl.p_glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1598     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1599
1600     gl_info->gl_ops.gl.p_glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1601     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1602     gl_info->gl_ops.gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);
1603     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1604
1605     if (gl_info->supported[ARB_VERTEX_BLEND])
1606     {
1607         /* Direct3D always uses n-1 weights for n world matrices and uses
1608          * 1 - sum for the last one this is equal to GL_WEIGHT_SUM_UNITY_ARB.
1609          * Enabling it doesn't do anything unless GL_VERTEX_BLEND_ARB isn't
1610          * enabled as well. */
1611         gl_info->gl_ops.gl.p_glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1612         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1613     }
1614     if (gl_info->supported[NV_TEXTURE_SHADER2])
1615     {
1616         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1617          * the previous texture where to source the offset from is always unit - 1.
1618          */
1619         for (s = 1; s < gl_info->limits.textures; ++s)
1620         {
1621             context_active_texture(ret, gl_info, s);
1622             gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_SHADER_NV,
1623                     GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1624             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1625         }
1626     }
1627     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1628     {
1629         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1630          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1631          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1632          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1633          * is ever assigned.
1634          *
1635          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1636          * program and the dummy program is destroyed when the context is destroyed.
1637          */
1638         const char *dummy_program =
1639                 "!!ARBfp1.0\n"
1640                 "MOV result.color, fragment.color.primary;\n"
1641                 "END\n";
1642         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1643         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1644         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1645     }
1646
1647     if (gl_info->supported[ARB_POINT_SPRITE])
1648     {
1649         for (s = 0; s < gl_info->limits.textures; ++s)
1650         {
1651             context_active_texture(ret, gl_info, s);
1652             gl_info->gl_ops.gl.p_glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1653             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1654         }
1655     }
1656
1657     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1658     {
1659         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1660     }
1661     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1662     {
1663         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1664     }
1665     ret->shader_update_mask = (1 << WINED3D_SHADER_TYPE_PIXEL)
1666             | (1 << WINED3D_SHADER_TYPE_VERTEX)
1667             | (1 << WINED3D_SHADER_TYPE_GEOMETRY);
1668
1669     /* If this happens to be the first context for the device, dummy textures
1670      * are not created yet. In that case, they will be created (and bound) by
1671      * create_dummy_textures right after this context is initialized. */
1672     if (device->dummy_texture_2d[0])
1673         bind_dummy_textures(device, ret);
1674
1675     TRACE("Created context %p.\n", ret);
1676
1677     return ret;
1678
1679 out:
1680     device->shader_backend->shader_free_context_data(ret);
1681     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1682     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1683     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1684     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1685     HeapFree(GetProcessHeap(), 0, ret);
1686     return NULL;
1687 }
1688
1689 void context_destroy(struct wined3d_device *device, struct wined3d_context *context)
1690 {
1691     BOOL destroy;
1692
1693     TRACE("Destroying ctx %p\n", context);
1694
1695     if (context->tid == GetCurrentThreadId() || !context->current)
1696     {
1697         context_destroy_gl_resources(context);
1698         TlsSetValue(wined3d_context_tls_idx, NULL);
1699         destroy = TRUE;
1700     }
1701     else
1702     {
1703         /* Make a copy of gl_info for context_destroy_gl_resources use, the one
1704            in wined3d_adapter may go away in the meantime */
1705         struct wined3d_gl_info *gl_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*gl_info));
1706         *gl_info = *context->gl_info;
1707         context->gl_info = gl_info;
1708         context->destroyed = 1;
1709         destroy = FALSE;
1710     }
1711
1712     device->shader_backend->shader_free_context_data(context);
1713     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1714     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1715     device_context_remove(device, context);
1716     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1717 }
1718
1719 /* Context activation is done by the caller. */
1720 static void set_blit_dimension(const struct wined3d_gl_info *gl_info, UINT width, UINT height)
1721 {
1722     const GLdouble projection[] =
1723     {
1724         2.0 / width,          0.0,  0.0, 0.0,
1725                 0.0, 2.0 / height,  0.0, 0.0,
1726                 0.0,          0.0,  2.0, 0.0,
1727                -1.0,         -1.0, -1.0, 1.0,
1728     };
1729
1730     gl_info->gl_ops.gl.p_glMatrixMode(GL_PROJECTION);
1731     checkGLcall("glMatrixMode(GL_PROJECTION)");
1732     gl_info->gl_ops.gl.p_glLoadMatrixd(projection);
1733     checkGLcall("glLoadMatrixd");
1734     gl_info->gl_ops.gl.p_glViewport(0, 0, width, height);
1735     checkGLcall("glViewport");
1736 }
1737
1738 static void context_get_rt_size(const struct wined3d_context *context, SIZE *size)
1739 {
1740     const struct wined3d_surface *rt = context->current_rt;
1741
1742     if (rt->swapchain && rt->swapchain->front_buffer == rt)
1743     {
1744         RECT window_size;
1745
1746         GetClientRect(context->win_handle, &window_size);
1747         size->cx = window_size.right - window_size.left;
1748         size->cy = window_size.bottom - window_size.top;
1749
1750         return;
1751     }
1752
1753     size->cx = rt->resource.width;
1754     size->cy = rt->resource.height;
1755 }
1756
1757 /*****************************************************************************
1758  * SetupForBlit
1759  *
1760  * Sets up a context for DirectDraw blitting.
1761  * All texture units are disabled, texture unit 0 is set as current unit
1762  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1763  * color writing enabled for all channels
1764  * register combiners disabled, shaders disabled
1765  * world matrix is set to identity, texture matrix 0 too
1766  * projection matrix is setup for drawing screen coordinates
1767  *
1768  * Params:
1769  *  This: Device to activate the context for
1770  *  context: Context to setup
1771  *
1772  *****************************************************************************/
1773 /* Context activation is done by the caller. */
1774 static void SetupForBlit(const struct wined3d_device *device, struct wined3d_context *context)
1775 {
1776     int i;
1777     const struct wined3d_gl_info *gl_info = context->gl_info;
1778     DWORD sampler;
1779     SIZE rt_size;
1780
1781     TRACE("Setting up context %p for blitting\n", context);
1782
1783     context_get_rt_size(context, &rt_size);
1784
1785     if (context->last_was_blit)
1786     {
1787         if (context->blit_w != rt_size.cx || context->blit_h != rt_size.cy)
1788         {
1789             set_blit_dimension(gl_info, rt_size.cx, rt_size.cy);
1790             context->blit_w = rt_size.cx;
1791             context->blit_h = rt_size.cy;
1792             /* No need to dirtify here, the states are still dirtified because
1793              * they weren't applied since the last SetupForBlit() call. */
1794         }
1795         TRACE("Context is already set up for blitting, nothing to do\n");
1796         return;
1797     }
1798     context->last_was_blit = TRUE;
1799
1800     /* Disable all textures. The caller can then bind a texture it wants to blit
1801      * from
1802      *
1803      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1804      * function texture unit. No need to care for higher samplers
1805      */
1806     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1807     {
1808         sampler = context->rev_tex_unit_map[i];
1809         context_active_texture(context, gl_info, i);
1810
1811         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1812         {
1813             gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1814             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1815         }
1816         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_3D);
1817         checkGLcall("glDisable GL_TEXTURE_3D");
1818         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1819         {
1820             gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_RECTANGLE_ARB);
1821             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1822         }
1823         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_2D);
1824         checkGLcall("glDisable GL_TEXTURE_2D");
1825
1826         gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1827         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1828
1829         if (sampler != WINED3D_UNMAPPED_STAGE)
1830         {
1831             if (sampler < MAX_TEXTURES)
1832                 context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3D_TSS_COLOR_OP));
1833             context_invalidate_state(context, STATE_SAMPLER(sampler));
1834         }
1835     }
1836     context_active_texture(context, gl_info, 0);
1837
1838     sampler = context->rev_tex_unit_map[0];
1839
1840     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1841     {
1842         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1843         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1844     }
1845     gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_3D);
1846     checkGLcall("glDisable GL_TEXTURE_3D");
1847     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1848     {
1849         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_RECTANGLE_ARB);
1850         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1851     }
1852     gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_2D);
1853     checkGLcall("glDisable GL_TEXTURE_2D");
1854
1855     gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1856
1857     gl_info->gl_ops.gl.p_glMatrixMode(GL_TEXTURE);
1858     checkGLcall("glMatrixMode(GL_TEXTURE)");
1859     gl_info->gl_ops.gl.p_glLoadIdentity();
1860     checkGLcall("glLoadIdentity()");
1861
1862     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
1863     {
1864         gl_info->gl_ops.gl.p_glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1865                 GL_TEXTURE_LOD_BIAS_EXT, 0.0f);
1866         checkGLcall("glTexEnvf GL_TEXTURE_LOD_BIAS_EXT ...");
1867     }
1868
1869     if (sampler != WINED3D_UNMAPPED_STAGE)
1870     {
1871         if (sampler < MAX_TEXTURES)
1872         {
1873             context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_TEXTURE0 + sampler));
1874             context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3D_TSS_COLOR_OP));
1875         }
1876         context_invalidate_state(context, STATE_SAMPLER(sampler));
1877     }
1878
1879     /* Other misc states */
1880     gl_info->gl_ops.gl.p_glDisable(GL_ALPHA_TEST);
1881     checkGLcall("glDisable(GL_ALPHA_TEST)");
1882     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHATESTENABLE));
1883     gl_info->gl_ops.gl.p_glDisable(GL_LIGHTING);
1884     checkGLcall("glDisable GL_LIGHTING");
1885     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_LIGHTING));
1886     gl_info->gl_ops.gl.p_glDisable(GL_DEPTH_TEST);
1887     checkGLcall("glDisable GL_DEPTH_TEST");
1888     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ZENABLE));
1889     glDisableWINE(GL_FOG);
1890     checkGLcall("glDisable GL_FOG");
1891     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_FOGENABLE));
1892     gl_info->gl_ops.gl.p_glDisable(GL_BLEND);
1893     checkGLcall("glDisable GL_BLEND");
1894     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
1895     gl_info->gl_ops.gl.p_glDisable(GL_CULL_FACE);
1896     checkGLcall("glDisable GL_CULL_FACE");
1897     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_CULLMODE));
1898     gl_info->gl_ops.gl.p_glDisable(GL_STENCIL_TEST);
1899     checkGLcall("glDisable GL_STENCIL_TEST");
1900     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_STENCILENABLE));
1901     gl_info->gl_ops.gl.p_glDisable(GL_SCISSOR_TEST);
1902     checkGLcall("glDisable GL_SCISSOR_TEST");
1903     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SCISSORTESTENABLE));
1904     if (gl_info->supported[ARB_POINT_SPRITE])
1905     {
1906         gl_info->gl_ops.gl.p_glDisable(GL_POINT_SPRITE_ARB);
1907         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1908         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_POINTSPRITEENABLE));
1909     }
1910     gl_info->gl_ops.gl.p_glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1911     checkGLcall("glColorMask");
1912     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE));
1913     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE1));
1914     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE2));
1915     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE3));
1916     if (gl_info->supported[EXT_SECONDARY_COLOR])
1917     {
1918         gl_info->gl_ops.gl.p_glDisable(GL_COLOR_SUM_EXT);
1919         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SPECULARENABLE));
1920         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1921     }
1922
1923     /* Setup transforms */
1924     gl_info->gl_ops.gl.p_glMatrixMode(GL_MODELVIEW);
1925     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1926     gl_info->gl_ops.gl.p_glLoadIdentity();
1927     checkGLcall("glLoadIdentity()");
1928     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_WORLD_MATRIX(0)));
1929
1930     context->last_was_rhw = TRUE;
1931     context_invalidate_state(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
1932
1933     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1934     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1935     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1936     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1937     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1938     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1939     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_CLIPPING));
1940
1941     set_blit_dimension(gl_info, rt_size.cx, rt_size.cy);
1942
1943     /* Disable shaders */
1944     device->shader_backend->shader_disable(device->shader_priv, context);
1945
1946     context->blit_w = rt_size.cx;
1947     context->blit_h = rt_size.cy;
1948     context_invalidate_state(context, STATE_VIEWPORT);
1949     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_PROJECTION));
1950 }
1951
1952 static inline BOOL is_rt_mask_onscreen(DWORD rt_mask)
1953 {
1954     return rt_mask & (1 << 31);
1955 }
1956
1957 static inline GLenum draw_buffer_from_rt_mask(DWORD rt_mask)
1958 {
1959     return rt_mask & ~(1 << 31);
1960 }
1961
1962 /* Context activation is done by the caller. */
1963 static void context_apply_draw_buffers(struct wined3d_context *context, DWORD rt_mask)
1964 {
1965     const struct wined3d_gl_info *gl_info = context->gl_info;
1966
1967     if (!rt_mask)
1968     {
1969         gl_info->gl_ops.gl.p_glDrawBuffer(GL_NONE);
1970         checkGLcall("glDrawBuffer()");
1971     }
1972     else if (is_rt_mask_onscreen(rt_mask))
1973     {
1974         gl_info->gl_ops.gl.p_glDrawBuffer(draw_buffer_from_rt_mask(rt_mask));
1975         checkGLcall("glDrawBuffer()");
1976     }
1977     else
1978     {
1979         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1980         {
1981             unsigned int i = 0;
1982
1983             while (rt_mask)
1984             {
1985                 if (rt_mask & 1)
1986                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
1987                 else
1988                     context->draw_buffers[i] = GL_NONE;
1989
1990                 rt_mask >>= 1;
1991                 ++i;
1992             }
1993
1994             if (gl_info->supported[ARB_DRAW_BUFFERS])
1995             {
1996                 GL_EXTCALL(glDrawBuffersARB(i, context->draw_buffers));
1997                 checkGLcall("glDrawBuffers()");
1998             }
1999             else
2000             {
2001                 gl_info->gl_ops.gl.p_glDrawBuffer(context->draw_buffers[0]);
2002                 checkGLcall("glDrawBuffer()");
2003             }
2004         }
2005         else
2006         {
2007             ERR("Unexpected draw buffers mask with backbuffer ORM.\n");
2008         }
2009     }
2010 }
2011
2012 /* Context activation is done by the caller. */
2013 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
2014 {
2015     const struct wined3d_gl_info *gl_info = context->gl_info;
2016     DWORD *current_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2017     DWORD new_mask = context_generate_rt_mask(buffer);
2018
2019     if (new_mask == *current_mask)
2020         return;
2021
2022     gl_info->gl_ops.gl.p_glDrawBuffer(buffer);
2023     checkGLcall("glDrawBuffer()");
2024
2025     *current_mask = new_mask;
2026 }
2027
2028 /* Context activation is done by the caller. */
2029 void context_active_texture(struct wined3d_context *context, const struct wined3d_gl_info *gl_info, unsigned int unit)
2030 {
2031     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0 + unit));
2032     checkGLcall("glActiveTextureARB");
2033     context->active_texture = unit;
2034 }
2035
2036 void context_bind_texture(struct wined3d_context *context, GLenum target, GLuint name)
2037 {
2038     const struct wined3d_gl_info *gl_info = context->gl_info;
2039     DWORD unit = context->active_texture;
2040     DWORD old_texture_type = context->texture_type[unit];
2041
2042     if (name)
2043     {
2044         gl_info->gl_ops.gl.p_glBindTexture(target, name);
2045         checkGLcall("glBindTexture");
2046     }
2047     else
2048     {
2049         target = GL_NONE;
2050     }
2051
2052     if (old_texture_type != target)
2053     {
2054         const struct wined3d_device *device = context->swapchain->device;
2055
2056         switch (old_texture_type)
2057         {
2058             case GL_NONE:
2059                 /* nothing to do */
2060                 break;
2061             case GL_TEXTURE_2D:
2062                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[unit]);
2063                 checkGLcall("glBindTexture");
2064                 break;
2065             case GL_TEXTURE_RECTANGLE_ARB:
2066                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[unit]);
2067                 checkGLcall("glBindTexture");
2068                 break;
2069             case GL_TEXTURE_CUBE_MAP:
2070                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[unit]);
2071                 checkGLcall("glBindTexture");
2072                 break;
2073             case GL_TEXTURE_3D:
2074                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[unit]);
2075                 checkGLcall("glBindTexture");
2076                 break;
2077             default:
2078                 ERR("Unexpected texture target %#x\n", old_texture_type);
2079         }
2080
2081         context->texture_type[unit] = target;
2082     }
2083 }
2084
2085 static void context_set_render_offscreen(struct wined3d_context *context, BOOL offscreen)
2086 {
2087     if (context->render_offscreen == offscreen) return;
2088
2089     context_invalidate_state(context, STATE_POINTSPRITECOORDORIGIN);
2090     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_PROJECTION));
2091     context_invalidate_state(context, STATE_VIEWPORT);
2092     context_invalidate_state(context, STATE_SCISSORRECT);
2093     context_invalidate_state(context, STATE_FRONTFACE);
2094     context->render_offscreen = offscreen;
2095 }
2096
2097 static BOOL match_depth_stencil_format(const struct wined3d_format *existing,
2098         const struct wined3d_format *required)
2099 {
2100     BYTE existing_depth, existing_stencil, required_depth, required_stencil;
2101
2102     if (existing == required) return TRUE;
2103     if ((existing->flags & WINED3DFMT_FLAG_FLOAT) != (required->flags & WINED3DFMT_FLAG_FLOAT)) return FALSE;
2104
2105     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
2106     getDepthStencilBits(required, &required_depth, &required_stencil);
2107
2108     if(existing_depth < required_depth) return FALSE;
2109     /* If stencil bits are used the exact amount is required - otherwise wrapping
2110      * won't work correctly */
2111     if(required_stencil && required_stencil != existing_stencil) return FALSE;
2112     return TRUE;
2113 }
2114
2115 /* The caller provides a context */
2116 static void context_validate_onscreen_formats(struct wined3d_context *context,
2117         const struct wined3d_surface *depth_stencil)
2118 {
2119     /* Onscreen surfaces are always in a swapchain */
2120     struct wined3d_swapchain *swapchain = context->current_rt->swapchain;
2121
2122     if (context->render_offscreen || !depth_stencil) return;
2123     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->resource.format)) return;
2124
2125     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2126      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2127      * format. */
2128     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2129
2130     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2131     surface_load_location(context->current_rt, WINED3D_LOCATION_TEXTURE_RGB);
2132     swapchain->render_to_fbo = TRUE;
2133     swapchain_update_draw_bindings(swapchain);
2134     context_set_render_offscreen(context, TRUE);
2135 }
2136
2137 static DWORD context_generate_rt_mask_no_fbo(const struct wined3d_device *device, const struct wined3d_surface *rt)
2138 {
2139     if (!rt || rt->resource.format->id == WINED3DFMT_NULL)
2140         return 0;
2141     else if (rt->swapchain)
2142         return context_generate_rt_mask_from_surface(rt);
2143     else
2144         return context_generate_rt_mask(device->offscreenBuffer);
2145 }
2146
2147 /* Context activation is done by the caller. */
2148 void context_apply_blit_state(struct wined3d_context *context, const struct wined3d_device *device)
2149 {
2150     struct wined3d_surface *rt = context->current_rt;
2151     DWORD rt_mask, *cur_mask;
2152
2153     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2154     {
2155         context_validate_onscreen_formats(context, NULL);
2156
2157         if (context->render_offscreen)
2158         {
2159             wined3d_texture_load(rt->container, context, FALSE);
2160
2161             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, rt, NULL, rt->draw_binding);
2162             if (rt->resource.format->id != WINED3DFMT_NULL)
2163                 rt_mask = 1;
2164             else
2165                 rt_mask = 0;
2166         }
2167         else
2168         {
2169             context->current_fbo = NULL;
2170             context_bind_fbo(context, GL_FRAMEBUFFER, 0);
2171             rt_mask = context_generate_rt_mask_from_surface(rt);
2172         }
2173     }
2174     else
2175     {
2176         rt_mask = context_generate_rt_mask_no_fbo(device, rt);
2177     }
2178
2179     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2180
2181     if (rt_mask != *cur_mask)
2182     {
2183         context_apply_draw_buffers(context, rt_mask);
2184         *cur_mask = rt_mask;
2185     }
2186
2187     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2188     {
2189         context_check_fbo_status(context, GL_FRAMEBUFFER);
2190     }
2191
2192     SetupForBlit(device, context);
2193     context_invalidate_state(context, STATE_FRAMEBUFFER);
2194 }
2195
2196 static BOOL context_validate_rt_config(UINT rt_count,
2197         struct wined3d_surface * const *rts, const struct wined3d_surface *ds)
2198 {
2199     unsigned int i;
2200
2201     if (ds) return TRUE;
2202
2203     for (i = 0; i < rt_count; ++i)
2204     {
2205         if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2206             return TRUE;
2207     }
2208
2209     WARN("Invalid render target config, need at least one attachment.\n");
2210     return FALSE;
2211 }
2212
2213 /* Context activation is done by the caller. */
2214 BOOL context_apply_clear_state(struct wined3d_context *context, const struct wined3d_device *device,
2215         UINT rt_count, const struct wined3d_fb_state *fb)
2216 {
2217     const struct wined3d_gl_info *gl_info = context->gl_info;
2218     DWORD rt_mask = 0, *cur_mask;
2219     UINT i;
2220     struct wined3d_surface **rts = fb->render_targets;
2221
2222     if (isStateDirty(context, STATE_FRAMEBUFFER) || fb != &device->fb
2223             || rt_count != context->gl_info->limits.buffers)
2224     {
2225         if (!context_validate_rt_config(rt_count, rts, fb->depth_stencil))
2226             return FALSE;
2227
2228         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2229         {
2230             context_validate_onscreen_formats(context, fb->depth_stencil);
2231
2232             if (!rt_count || surface_is_offscreen(rts[0]))
2233             {
2234                 for (i = 0; i < rt_count; ++i)
2235                 {
2236                     context->blit_targets[i] = rts[i];
2237                     if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL)
2238                         rt_mask |= (1 << i);
2239                 }
2240                 while (i < context->gl_info->limits.buffers)
2241                 {
2242                     context->blit_targets[i] = NULL;
2243                     ++i;
2244                 }
2245                 context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets, fb->depth_stencil,
2246                         rt_count ? rts[0]->draw_binding : WINED3D_LOCATION_TEXTURE_RGB);
2247             }
2248             else
2249             {
2250                 context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, WINED3D_LOCATION_DRAWABLE);
2251                 rt_mask = context_generate_rt_mask_from_surface(rts[0]);
2252             }
2253
2254             /* If the framebuffer is not the device's fb the device's fb has to be reapplied
2255              * next draw. Otherwise we could mark the framebuffer state clean here, once the
2256              * state management allows this */
2257             context_invalidate_state(context, STATE_FRAMEBUFFER);
2258         }
2259         else
2260         {
2261             rt_mask = context_generate_rt_mask_no_fbo(device, rt_count ? rts[0] : NULL);
2262         }
2263     }
2264     else if (wined3d_settings.offscreen_rendering_mode == ORM_FBO
2265             && (!rt_count || surface_is_offscreen(rts[0])))
2266     {
2267         for (i = 0; i < rt_count; ++i)
2268         {
2269             if (rts[i] && rts[i]->resource.format->id != WINED3DFMT_NULL) rt_mask |= (1 << i);
2270         }
2271     }
2272     else
2273     {
2274         rt_mask = context_generate_rt_mask_no_fbo(device, rt_count ? rts[0] : NULL);
2275     }
2276
2277     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2278
2279     if (rt_mask != *cur_mask)
2280     {
2281         context_apply_draw_buffers(context, rt_mask);
2282         *cur_mask = rt_mask;
2283         context_invalidate_state(context, STATE_FRAMEBUFFER);
2284     }
2285
2286     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2287     {
2288         context_check_fbo_status(context, GL_FRAMEBUFFER);
2289     }
2290
2291     if (context->last_was_blit)
2292         context->last_was_blit = FALSE;
2293
2294     /* Blending and clearing should be orthogonal, but tests on the nvidia
2295      * driver show that disabling blending when clearing improves the clearing
2296      * performance incredibly. */
2297     gl_info->gl_ops.gl.p_glDisable(GL_BLEND);
2298     gl_info->gl_ops.gl.p_glEnable(GL_SCISSOR_TEST);
2299     checkGLcall("glEnable GL_SCISSOR_TEST");
2300
2301     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
2302     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SCISSORTESTENABLE));
2303     context_invalidate_state(context, STATE_SCISSORRECT);
2304
2305     return TRUE;
2306 }
2307
2308 static DWORD find_draw_buffers_mask(const struct wined3d_context *context, const struct wined3d_device *device)
2309 {
2310     const struct wined3d_state *state = &device->state;
2311     struct wined3d_surface **rts = state->fb->render_targets;
2312     struct wined3d_shader *ps = state->shader[WINED3D_SHADER_TYPE_PIXEL];
2313     DWORD rt_mask, rt_mask_bits;
2314     unsigned int i;
2315
2316     if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) return context_generate_rt_mask_no_fbo(device, rts[0]);
2317     else if (!context->render_offscreen) return context_generate_rt_mask_from_surface(rts[0]);
2318
2319     rt_mask = ps ? ps->reg_maps.rt_mask : 1;
2320     rt_mask &= context->d3d_info->valid_rt_mask;
2321     rt_mask_bits = rt_mask;
2322     i = 0;
2323     while (rt_mask_bits)
2324     {
2325         rt_mask_bits &= ~(1 << i);
2326         if (!rts[i] || rts[i]->resource.format->id == WINED3DFMT_NULL)
2327             rt_mask &= ~(1 << i);
2328
2329         i++;
2330     }
2331
2332     return rt_mask;
2333 }
2334
2335 /* Context activation is done by the caller. */
2336 void context_state_fb(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2337 {
2338     const struct wined3d_device *device = context->swapchain->device;
2339     const struct wined3d_fb_state *fb = state->fb;
2340     DWORD rt_mask = find_draw_buffers_mask(context, device);
2341     DWORD *cur_mask;
2342
2343     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2344     {
2345         if (!context->render_offscreen)
2346         {
2347             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL, WINED3D_LOCATION_DRAWABLE);
2348         }
2349         else
2350         {
2351             context_apply_fbo_state(context, GL_FRAMEBUFFER, fb->render_targets, fb->depth_stencil,
2352                     fb->render_targets[0]->draw_binding);
2353         }
2354     }
2355
2356     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2357     if (rt_mask != *cur_mask)
2358     {
2359         context_apply_draw_buffers(context, rt_mask);
2360         *cur_mask = rt_mask;
2361     }
2362 }
2363
2364 static void context_map_stage(struct wined3d_context *context, DWORD stage, DWORD unit)
2365 {
2366     DWORD i = context->rev_tex_unit_map[unit];
2367     DWORD j = context->tex_unit_map[stage];
2368
2369     context->tex_unit_map[stage] = unit;
2370     if (i != WINED3D_UNMAPPED_STAGE && i != stage)
2371         context->tex_unit_map[i] = WINED3D_UNMAPPED_STAGE;
2372
2373     context->rev_tex_unit_map[unit] = stage;
2374     if (j != WINED3D_UNMAPPED_STAGE && j != unit)
2375         context->rev_tex_unit_map[j] = WINED3D_UNMAPPED_STAGE;
2376 }
2377
2378 static void context_invalidate_texture_stage(struct wined3d_context *context, DWORD stage)
2379 {
2380     DWORD i;
2381
2382     for (i = 0; i <= WINED3D_HIGHEST_TEXTURE_STATE; ++i)
2383         context_invalidate_state(context, STATE_TEXTURESTAGE(stage, i));
2384 }
2385
2386 static void context_update_fixed_function_usage_map(struct wined3d_context *context,
2387         const struct wined3d_state *state)
2388 {
2389     UINT i, start, end;
2390
2391     context->fixed_function_usage_map = 0;
2392     for (i = 0; i < MAX_TEXTURES; ++i)
2393     {
2394         enum wined3d_texture_op color_op = state->texture_states[i][WINED3D_TSS_COLOR_OP];
2395         enum wined3d_texture_op alpha_op = state->texture_states[i][WINED3D_TSS_ALPHA_OP];
2396         DWORD color_arg1 = state->texture_states[i][WINED3D_TSS_COLOR_ARG1] & WINED3DTA_SELECTMASK;
2397         DWORD color_arg2 = state->texture_states[i][WINED3D_TSS_COLOR_ARG2] & WINED3DTA_SELECTMASK;
2398         DWORD color_arg3 = state->texture_states[i][WINED3D_TSS_COLOR_ARG0] & WINED3DTA_SELECTMASK;
2399         DWORD alpha_arg1 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG1] & WINED3DTA_SELECTMASK;
2400         DWORD alpha_arg2 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG2] & WINED3DTA_SELECTMASK;
2401         DWORD alpha_arg3 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG0] & WINED3DTA_SELECTMASK;
2402
2403         /* Not used, and disable higher stages. */
2404         if (color_op == WINED3D_TOP_DISABLE)
2405             break;
2406
2407         if (((color_arg1 == WINED3DTA_TEXTURE) && color_op != WINED3D_TOP_SELECT_ARG2)
2408                 || ((color_arg2 == WINED3DTA_TEXTURE) && color_op != WINED3D_TOP_SELECT_ARG1)
2409                 || ((color_arg3 == WINED3DTA_TEXTURE)
2410                     && (color_op == WINED3D_TOP_MULTIPLY_ADD || color_op == WINED3D_TOP_LERP))
2411                 || ((alpha_arg1 == WINED3DTA_TEXTURE) && alpha_op != WINED3D_TOP_SELECT_ARG2)
2412                 || ((alpha_arg2 == WINED3DTA_TEXTURE) && alpha_op != WINED3D_TOP_SELECT_ARG1)
2413                 || ((alpha_arg3 == WINED3DTA_TEXTURE)
2414                     && (alpha_op == WINED3D_TOP_MULTIPLY_ADD || alpha_op == WINED3D_TOP_LERP)))
2415             context->fixed_function_usage_map |= (1 << i);
2416
2417         if ((color_op == WINED3D_TOP_BUMPENVMAP || color_op == WINED3D_TOP_BUMPENVMAP_LUMINANCE)
2418                 && i < MAX_TEXTURES - 1)
2419             context->fixed_function_usage_map |= (1 << (i + 1));
2420     }
2421
2422     if (i < context->lowest_disabled_stage)
2423     {
2424         start = i;
2425         end = context->lowest_disabled_stage;
2426     }
2427     else
2428     {
2429         start = context->lowest_disabled_stage;
2430         end = i;
2431     }
2432
2433     context->lowest_disabled_stage = i;
2434     for (i = start + 1; i < end; ++i)
2435     {
2436         context_invalidate_state(context, STATE_TEXTURESTAGE(i, WINED3D_TSS_COLOR_OP));
2437     }
2438 }
2439
2440 static void context_map_fixed_function_samplers(struct wined3d_context *context,
2441         const struct wined3d_state *state)
2442 {
2443     unsigned int i, tex;
2444     WORD ffu_map;
2445     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2446
2447     context_update_fixed_function_usage_map(context, state);
2448     ffu_map = context->fixed_function_usage_map;
2449
2450     if (d3d_info->limits.ffp_textures == d3d_info->limits.ffp_blend_stages
2451             || context->lowest_disabled_stage <= d3d_info->limits.ffp_textures)
2452     {
2453         for (i = 0; ffu_map; ffu_map >>= 1, ++i)
2454         {
2455             if (!(ffu_map & 1))
2456                 continue;
2457
2458             if (context->tex_unit_map[i] != i)
2459             {
2460                 context_map_stage(context, i, i);
2461                 context_invalidate_state(context, STATE_SAMPLER(i));
2462                 context_invalidate_texture_stage(context, i);
2463             }
2464         }
2465         return;
2466     }
2467
2468     /* Now work out the mapping */
2469     tex = 0;
2470     for (i = 0; ffu_map; ffu_map >>= 1, ++i)
2471     {
2472         if (!(ffu_map & 1))
2473             continue;
2474
2475         if (context->tex_unit_map[i] != tex)
2476         {
2477             context_map_stage(context, i, tex);
2478             context_invalidate_state(context, STATE_SAMPLER(i));
2479             context_invalidate_texture_stage(context, i);
2480         }
2481
2482         ++tex;
2483     }
2484 }
2485
2486 static void context_map_psamplers(struct wined3d_context *context, const struct wined3d_state *state)
2487 {
2488     const enum wined3d_sampler_texture_type *sampler_type =
2489             state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.sampler_type;
2490     unsigned int i;
2491     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2492
2493     for (i = 0; i < MAX_FRAGMENT_SAMPLERS; ++i)
2494     {
2495         if (sampler_type[i] && context->tex_unit_map[i] != i)
2496         {
2497             context_map_stage(context, i, i);
2498             context_invalidate_state(context, STATE_SAMPLER(i));
2499             if (i < d3d_info->limits.ffp_blend_stages)
2500                 context_invalidate_texture_stage(context, i);
2501         }
2502     }
2503 }
2504
2505 static BOOL context_unit_free_for_vs(const struct wined3d_context *context,
2506         const enum wined3d_sampler_texture_type *pshader_sampler_tokens,
2507         const enum wined3d_sampler_texture_type *vshader_sampler_tokens, DWORD unit)
2508 {
2509     DWORD current_mapping = context->rev_tex_unit_map[unit];
2510
2511     /* Not currently used */
2512     if (current_mapping == WINED3D_UNMAPPED_STAGE)
2513         return TRUE;
2514
2515     if (current_mapping < MAX_FRAGMENT_SAMPLERS)
2516     {
2517         /* Used by a fragment sampler */
2518
2519         if (!pshader_sampler_tokens)
2520         {
2521             /* No pixel shader, check fixed function */
2522             return current_mapping >= MAX_TEXTURES || !(context->fixed_function_usage_map & (1 << current_mapping));
2523         }
2524
2525         /* Pixel shader, check the shader's sampler map */
2526         return !pshader_sampler_tokens[current_mapping];
2527     }
2528
2529     /* Used by a vertex sampler */
2530     return !vshader_sampler_tokens[current_mapping - MAX_FRAGMENT_SAMPLERS];
2531 }
2532
2533 static void context_map_vsamplers(struct wined3d_context *context, BOOL ps, const struct wined3d_state *state)
2534 {
2535     const enum wined3d_sampler_texture_type *vshader_sampler_type =
2536             state->shader[WINED3D_SHADER_TYPE_VERTEX]->reg_maps.sampler_type;
2537     const enum wined3d_sampler_texture_type *pshader_sampler_type = NULL;
2538     const struct wined3d_gl_info *gl_info = context->gl_info;
2539     int start = min(MAX_COMBINED_SAMPLERS, gl_info->limits.combined_samplers) - 1;
2540     int i;
2541
2542     if (ps)
2543     {
2544         /* Note that we only care if a sampler is sampled or not, not the sampler's specific type.
2545          * Otherwise we'd need to call shader_update_samplers() here for 1.x pixelshaders. */
2546         pshader_sampler_type = state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.sampler_type;
2547     }
2548
2549     for (i = 0; i < MAX_VERTEX_SAMPLERS; ++i) {
2550         DWORD vsampler_idx = i + MAX_FRAGMENT_SAMPLERS;
2551         if (vshader_sampler_type[i])
2552         {
2553             if (context->tex_unit_map[vsampler_idx] != WINED3D_UNMAPPED_STAGE)
2554             {
2555                 /* Already mapped somewhere */
2556                 continue;
2557             }
2558
2559             while (start >= 0)
2560             {
2561                 if (context_unit_free_for_vs(context, pshader_sampler_type, vshader_sampler_type, start))
2562                 {
2563                     context_map_stage(context, vsampler_idx, start);
2564                     context_invalidate_state(context, STATE_SAMPLER(vsampler_idx));
2565
2566                     --start;
2567                     break;
2568                 }
2569
2570                 --start;
2571             }
2572         }
2573     }
2574 }
2575
2576 static void context_update_tex_unit_map(struct wined3d_context *context, const struct wined3d_state *state)
2577 {
2578     BOOL vs = use_vs(state);
2579     BOOL ps = use_ps(state);
2580     /*
2581      * Rules are:
2582      * -> Pixel shaders need a 1:1 map. In theory the shader input could be mapped too, but
2583      * that would be really messy and require shader recompilation
2584      * -> When the mapping of a stage is changed, sampler and ALL texture stage states have
2585      * to be reset. Because of that try to work with a 1:1 mapping as much as possible
2586      */
2587     if (ps)
2588         context_map_psamplers(context, state);
2589     else
2590         context_map_fixed_function_samplers(context, state);
2591
2592     if (vs)
2593         context_map_vsamplers(context, ps, state);
2594 }
2595
2596 /* Context activation is done by the caller. */
2597 void context_state_drawbuf(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2598 {
2599     const struct wined3d_device *device = context->swapchain->device;
2600     DWORD rt_mask, *cur_mask;
2601
2602     if (isStateDirty(context, STATE_FRAMEBUFFER)) return;
2603
2604     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2605     rt_mask = find_draw_buffers_mask(context, device);
2606     if (rt_mask != *cur_mask)
2607     {
2608         context_apply_draw_buffers(context, rt_mask);
2609         *cur_mask = rt_mask;
2610     }
2611 }
2612
2613 static BOOL fixed_get_input(BYTE usage, BYTE usage_idx, unsigned int *regnum)
2614 {
2615     if ((usage == WINED3D_DECL_USAGE_POSITION || usage == WINED3D_DECL_USAGE_POSITIONT) && !usage_idx)
2616         *regnum = WINED3D_FFP_POSITION;
2617     else if (usage == WINED3D_DECL_USAGE_BLEND_WEIGHT && !usage_idx)
2618         *regnum = WINED3D_FFP_BLENDWEIGHT;
2619     else if (usage == WINED3D_DECL_USAGE_BLEND_INDICES && !usage_idx)
2620         *regnum = WINED3D_FFP_BLENDINDICES;
2621     else if (usage == WINED3D_DECL_USAGE_NORMAL && !usage_idx)
2622         *regnum = WINED3D_FFP_NORMAL;
2623     else if (usage == WINED3D_DECL_USAGE_PSIZE && !usage_idx)
2624         *regnum = WINED3D_FFP_PSIZE;
2625     else if (usage == WINED3D_DECL_USAGE_COLOR && !usage_idx)
2626         *regnum = WINED3D_FFP_DIFFUSE;
2627     else if (usage == WINED3D_DECL_USAGE_COLOR && usage_idx == 1)
2628         *regnum = WINED3D_FFP_SPECULAR;
2629     else if (usage == WINED3D_DECL_USAGE_TEXCOORD && usage_idx < WINED3DDP_MAXTEXCOORD)
2630         *regnum = WINED3D_FFP_TEXCOORD0 + usage_idx;
2631     else
2632     {
2633         FIXME("Unsupported input stream [usage=%s, usage_idx=%u].\n", debug_d3ddeclusage(usage), usage_idx);
2634         *regnum = ~0U;
2635         return FALSE;
2636     }
2637
2638     return TRUE;
2639 }
2640
2641 /* FIXME: Separate buffer loading from declaration decoding */
2642 /* Context activation is done by the caller. */
2643 void context_stream_info_from_declaration(struct wined3d_context *context,
2644         const struct wined3d_state *state, struct wined3d_stream_info *stream_info)
2645 {
2646     /* We need to deal with frequency data! */
2647     struct wined3d_vertex_declaration *declaration = state->vertex_declaration;
2648     BOOL use_vshader = use_vs(state);
2649     unsigned int i;
2650     WORD map;
2651
2652     stream_info->use_map = 0;
2653     stream_info->swizzle_map = 0;
2654     stream_info->all_vbo = 1;
2655     stream_info->position_transformed = declaration->position_transformed;
2656
2657     /* Translate the declaration into strided data. */
2658     for (i = 0; i < declaration->element_count; ++i)
2659     {
2660         const struct wined3d_vertex_declaration_element *element = &declaration->elements[i];
2661         const struct wined3d_stream_state *stream = &state->streams[element->input_slot];
2662         struct wined3d_buffer *buffer = stream->buffer;
2663         struct wined3d_bo_address data;
2664         BOOL stride_used;
2665         unsigned int idx;
2666         DWORD stride;
2667
2668         TRACE("%p Element %p (%u of %u).\n", declaration->elements,
2669                 element, i + 1, declaration->element_count);
2670
2671         if (!buffer) continue;
2672
2673         stride = stream->stride;
2674         TRACE("Stream %u in buffer %p.\n", element->input_slot, buffer);
2675         buffer_get_memory(buffer, context, &data);
2676
2677         /* Can't use vbo's if the base vertex index is negative. OpenGL doesn't accept negative offsets
2678          * (or rather offsets bigger than the vbo, because the pointer is unsigned), so use system memory
2679          * sources. In most sane cases the pointer - offset will still be > 0, otherwise it will wrap
2680          * around to some big value. Hope that with the indices, the driver wraps it back internally. If
2681          * not, drawStridedSlow is needed, including a vertex buffer path. */
2682         if (state->load_base_vertex_index < 0)
2683         {
2684             WARN_(d3d_perf)("load_base_vertex_index is < 0 (%d), not using VBOs.\n",
2685                     state->load_base_vertex_index);
2686             data.buffer_object = 0;
2687             data.addr = buffer_get_sysmem(buffer, context);
2688             if ((UINT_PTR)data.addr < -state->load_base_vertex_index * stride)
2689             {
2690                 FIXME("System memory vertex data load offset is negative!\n");
2691             }
2692         }
2693         data.addr += element->offset;
2694
2695         TRACE("offset %u input_slot %u usage_idx %d.\n", element->offset, element->input_slot, element->usage_idx);
2696
2697         if (use_vshader)
2698         {
2699             if (element->output_slot == ~0U)
2700             {
2701                 /* TODO: Assuming vertexdeclarations are usually used with the
2702                  * same or a similar shader, it might be worth it to store the
2703                  * last used output slot and try that one first. */
2704                 stride_used = vshader_get_input(state->shader[WINED3D_SHADER_TYPE_VERTEX],
2705                         element->usage, element->usage_idx, &idx);
2706             }
2707             else
2708             {
2709                 idx = element->output_slot;
2710                 stride_used = TRUE;
2711             }
2712         }
2713         else
2714         {
2715             if (!element->ffp_valid)
2716             {
2717                 WARN("Skipping unsupported fixed function element of format %s and usage %s.\n",
2718                         debug_d3dformat(element->format->id), debug_d3ddeclusage(element->usage));
2719                 stride_used = FALSE;
2720             }
2721             else
2722             {
2723                 stride_used = fixed_get_input(element->usage, element->usage_idx, &idx);
2724             }
2725         }
2726
2727         if (stride_used)
2728         {
2729             TRACE("Load %s array %u [usage %s, usage_idx %u, "
2730                     "input_slot %u, offset %u, stride %u, format %s, buffer_object %u].\n",
2731                     use_vshader ? "shader": "fixed function", idx,
2732                     debug_d3ddeclusage(element->usage), element->usage_idx, element->input_slot,
2733                     element->offset, stride, debug_d3dformat(element->format->id), data.buffer_object);
2734
2735             data.addr += stream->offset;
2736
2737             stream_info->elements[idx].format = element->format;
2738             stream_info->elements[idx].data = data;
2739             stream_info->elements[idx].stride = stride;
2740             stream_info->elements[idx].stream_idx = element->input_slot;
2741
2742             if (!context->gl_info->supported[ARB_VERTEX_ARRAY_BGRA]
2743                     && element->format->id == WINED3DFMT_B8G8R8A8_UNORM)
2744             {
2745                 stream_info->swizzle_map |= 1 << idx;
2746             }
2747             stream_info->use_map |= 1 << idx;
2748         }
2749     }
2750
2751     /* Preload the vertex buffers. */
2752     context->num_buffer_queries = 0;
2753     for (i = 0, map = stream_info->use_map; map; map >>= 1, ++i)
2754     {
2755         struct wined3d_stream_info_element *element;
2756         struct wined3d_buffer *buffer;
2757
2758         if (!(map & 1))
2759             continue;
2760
2761         element = &stream_info->elements[i];
2762         buffer = state->streams[element->stream_idx].buffer;
2763         buffer_internal_preload(buffer, context, state);
2764
2765         /* If the preload dropped the buffer object, update the stream info. */
2766         if (buffer->buffer_object != element->data.buffer_object)
2767         {
2768             element->data.buffer_object = 0;
2769             element->data.addr = buffer_get_sysmem(buffer, context)
2770                     + (ptrdiff_t)element->data.addr;
2771         }
2772
2773         if (!buffer->buffer_object)
2774             stream_info->all_vbo = 0;
2775
2776         if (buffer->query)
2777             context->buffer_queries[context->num_buffer_queries++] = buffer->query;
2778     }
2779 }
2780
2781 /* Context activation is done by the caller. */
2782 static void context_update_stream_info(struct wined3d_context *context, const struct wined3d_state *state)
2783 {
2784     const struct wined3d_gl_info *gl_info = context->gl_info;
2785     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2786     struct wined3d_stream_info *stream_info = &context->stream_info;
2787     DWORD prev_all_vbo = stream_info->all_vbo;
2788
2789     TRACE("============================= Vertex Declaration =============================\n");
2790     context_stream_info_from_declaration(context, state, stream_info);
2791
2792     if (use_vs(state))
2793     {
2794         if (state->vertex_declaration->half_float_conv_needed && !stream_info->all_vbo)
2795         {
2796             TRACE("Using drawStridedSlow with vertex shaders for FLOAT16 conversion.\n");
2797             context->use_immediate_mode_draw = TRUE;
2798         }
2799         else
2800         {
2801             context->use_immediate_mode_draw = FALSE;
2802         }
2803     }
2804     else
2805     {
2806         WORD slow_mask = (1 << WINED3D_FFP_PSIZE);
2807         slow_mask |= -!gl_info->supported[ARB_VERTEX_ARRAY_BGRA]
2808                 & ((1 << WINED3D_FFP_DIFFUSE) | (1 << WINED3D_FFP_SPECULAR));
2809
2810         if (((stream_info->position_transformed && !d3d_info->xyzrhw)
2811                 || (stream_info->use_map & slow_mask)) && !stream_info->all_vbo)
2812             context->use_immediate_mode_draw = TRUE;
2813         else
2814             context->use_immediate_mode_draw = FALSE;
2815     }
2816
2817     if (prev_all_vbo != stream_info->all_vbo)
2818         context_invalidate_state(context, STATE_INDEXBUFFER);
2819 }
2820
2821 /* Context activation is done by the caller. */
2822 static void context_preload_texture(struct wined3d_context *context,
2823         const struct wined3d_state *state, unsigned int idx)
2824 {
2825     struct wined3d_texture *texture;
2826
2827     if (!(texture = state->textures[idx]))
2828         return;
2829
2830     wined3d_texture_load(texture, context, state->sampler_states[idx][WINED3D_SAMP_SRGB_TEXTURE]);
2831 }
2832
2833 /* Context activation is done by the caller. */
2834 static void context_preload_textures(struct wined3d_context *context, const struct wined3d_state *state)
2835 {
2836     unsigned int i;
2837
2838     if (use_vs(state))
2839     {
2840         for (i = 0; i < MAX_VERTEX_SAMPLERS; ++i)
2841         {
2842             if (state->shader[WINED3D_SHADER_TYPE_VERTEX]->reg_maps.sampler_type[i])
2843                 context_preload_texture(context, state, MAX_FRAGMENT_SAMPLERS + i);
2844         }
2845     }
2846
2847     if (use_ps(state))
2848     {
2849         for (i = 0; i < MAX_FRAGMENT_SAMPLERS; ++i)
2850         {
2851             if (state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.sampler_type[i])
2852                 context_preload_texture(context, state, i);
2853         }
2854     }
2855     else
2856     {
2857         WORD ffu_map = context->fixed_function_usage_map;
2858
2859         for (i = 0; ffu_map; ffu_map >>= 1, ++i)
2860         {
2861             if (ffu_map & 1)
2862                 context_preload_texture(context, state, i);
2863         }
2864     }
2865 }
2866
2867 /* Context activation is done by the caller. */
2868 BOOL context_apply_draw_state(struct wined3d_context *context, struct wined3d_device *device)
2869 {
2870     const struct wined3d_state *state = &device->state;
2871     const struct StateEntry *state_table = context->state_table;
2872     const struct wined3d_fb_state *fb = state->fb;
2873     unsigned int i;
2874
2875     if (!context_validate_rt_config(context->gl_info->limits.buffers,
2876             fb->render_targets, fb->depth_stencil))
2877         return FALSE;
2878
2879     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO && isStateDirty(context, STATE_FRAMEBUFFER))
2880     {
2881         context_validate_onscreen_formats(context, fb->depth_stencil);
2882     }
2883
2884     /* Preload resources before FBO setup. Texture preload in particular may
2885      * result in changes to the current FBO, due to using e.g. FBO blits for
2886      * updating a resource location. */
2887     context_update_tex_unit_map(context, state);
2888     context_preload_textures(context, state);
2889     if (isStateDirty(context, STATE_VDECL) || isStateDirty(context, STATE_STREAMSRC))
2890         context_update_stream_info(context, state);
2891     if (state->index_buffer)
2892     {
2893         if (context->stream_info.all_vbo)
2894             buffer_internal_preload(state->index_buffer, context, state);
2895         else
2896             buffer_get_sysmem(state->index_buffer, context);
2897     }
2898
2899     for (i = 0; i < context->numDirtyEntries; ++i)
2900     {
2901         DWORD rep = context->dirtyArray[i];
2902         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
2903         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
2904         context->isStateDirty[idx] &= ~(1 << shift);
2905         state_table[rep].apply(context, state, rep);
2906     }
2907
2908     if (context->shader_update_mask)
2909     {
2910         device->shader_backend->shader_select(device->shader_priv, context, state);
2911         context->shader_update_mask = 0;
2912     }
2913
2914     if (context->constant_update_mask)
2915     {
2916         device->shader_backend->shader_load_constants(device->shader_priv, context, state);
2917         context->constant_update_mask = 0;
2918     }
2919
2920     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2921     {
2922         context_check_fbo_status(context, GL_FRAMEBUFFER);
2923     }
2924
2925     context->numDirtyEntries = 0; /* This makes the whole list clean */
2926     context->last_was_blit = FALSE;
2927
2928     return TRUE;
2929 }
2930
2931 static void context_setup_target(struct wined3d_context *context, struct wined3d_surface *target)
2932 {
2933     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
2934
2935     render_offscreen = surface_is_offscreen(target);
2936     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
2937
2938     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
2939      * the alpha blend state changes with different render target formats. */
2940     if (!context->current_rt)
2941     {
2942         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
2943     }
2944     else
2945     {
2946         const struct wined3d_format *old = context->current_rt->resource.format;
2947         const struct wined3d_format *new = target->resource.format;
2948
2949         if (old->id != new->id)
2950         {
2951             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
2952             if ((old->alpha_size && !new->alpha_size) || (!old->alpha_size && new->alpha_size)
2953                     || !(new->flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
2954                 context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
2955
2956             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
2957             if ((old->flags & WINED3DFMT_FLAG_SRGB_WRITE) != (new->flags & WINED3DFMT_FLAG_SRGB_WRITE))
2958                 context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SRGBWRITEENABLE));
2959         }
2960
2961         /* When switching away from an offscreen render target, and we're not
2962          * using FBOs, we have to read the drawable into the texture. This is
2963          * done via PreLoad (and WINED3D_LOCATION_DRAWABLE set on the surface).
2964          * There are some things that need care though. PreLoad needs a GL context,
2965          * and FindContext is called before the context is activated. It also
2966          * has to be called with the old rendertarget active, otherwise a
2967          * wrong drawable is read. */
2968         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
2969                 && old_render_offscreen && context->current_rt != target)
2970         {
2971             struct wined3d_texture *texture = context->current_rt->container;
2972
2973             /* Read the back buffer of the old drawable into the destination texture. */
2974             if (texture->texture_srgb.name)
2975                 wined3d_texture_load(texture, context, TRUE);
2976             wined3d_texture_load(texture, context, FALSE);
2977             surface_invalidate_location(context->current_rt, WINED3D_LOCATION_DRAWABLE);
2978         }
2979     }
2980
2981     context->current_rt = target;
2982     context_set_render_offscreen(context, render_offscreen);
2983 }
2984
2985 struct wined3d_context *context_acquire(const struct wined3d_device *device, struct wined3d_surface *target)
2986 {
2987     struct wined3d_context *current_context = context_get_current();
2988     struct wined3d_context *context;
2989
2990     TRACE("device %p, target %p.\n", device, target);
2991
2992     if (current_context && current_context->destroyed)
2993         current_context = NULL;
2994
2995     if (!target)
2996     {
2997         if (current_context
2998                 && current_context->current_rt
2999                 && current_context->swapchain->device == device)
3000         {
3001             target = current_context->current_rt;
3002         }
3003         else
3004         {
3005             struct wined3d_swapchain *swapchain = device->swapchains[0];
3006             if (swapchain->back_buffers)
3007                 target = swapchain->back_buffers[0];
3008             else
3009                 target = swapchain->front_buffer;
3010         }
3011     }
3012
3013     if (current_context && current_context->current_rt == target)
3014     {
3015         context = current_context;
3016     }
3017     else if (target->swapchain)
3018     {
3019         TRACE("Rendering onscreen.\n");
3020
3021         context = swapchain_get_context(target->swapchain);
3022     }
3023     else
3024     {
3025         TRACE("Rendering offscreen.\n");
3026
3027         /* Stay with the current context if possible. Otherwise use the
3028          * context for the primary swapchain. */
3029         if (current_context && current_context->swapchain->device == device)
3030             context = current_context;
3031         else
3032             context = swapchain_get_context(device->swapchains[0]);
3033     }
3034
3035     context_enter(context);
3036     context_update_window(context);
3037     context_setup_target(context, target);
3038     if (!context->valid) return context;
3039
3040     if (context != current_context)
3041     {
3042         if (!context_set_current(context))
3043             ERR("Failed to activate the new context.\n");
3044     }
3045     else if (context->needs_set)
3046     {
3047         context_set_gl_context(context);
3048     }
3049
3050     return context;
3051 }