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->container->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                     wined3d_texture_prepare_texture(depth_stencil->container, 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                 wined3d_texture_prepare_texture(surface->container, 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("\tColor Location %s (%#x).\n", wined3d_debug_location(context->current_fbo->color_location),
 280                 context->current_fbo->color_location);
 281         FIXME("\tDepth Stencil Location %s (%#x).\n", wined3d_debug_location(context->current_fbo->ds_location),
 282                 context->current_fbo->ds_location);
 283
 284         /* Dump the FBO attachments */
 285         for (i = 0; i < gl_info->limits.buffers; ++i)
 286         {
 287             attachment = context->current_fbo->render_targets[i];
 288             if (attachment)
 289             {
 290                 FIXME("\tColor attachment %d: (%p) %s %ux%u %u samples.\n",
 291                         i, attachment, debug_d3dformat(attachment->resource.format->id),
 292                         attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 293             }
 294         }
 295         attachment = context->current_fbo->depth_stencil;
 296         if (attachment)
 297         {
 298             FIXME("\tDepth attachment: (%p) %s %ux%u %u samples.\n",
 299                     attachment, debug_d3dformat(attachment->resource.format->id),
 300                     attachment->pow2Width, attachment->pow2Height, attachment->resource.multisample_type);
 301         }
 302     }
 303 }
 304
 305 static inline DWORD context_generate_rt_mask(GLenum buffer)
 306 {
 307     /* Should take care of all the GL_FRONT/GL_BACK/GL_AUXi/GL_NONE... cases */
 308     return buffer ? (1 << 31) | buffer : 0;
 309 }
 310
 311 static inline DWORD context_generate_rt_mask_from_surface(const struct wined3d_surface *target)
 312 {
 313     return (1 << 31) | surface_get_gl_buffer(target);
 314 }
 315
 316 static struct fbo_entry *context_create_fbo_entry(const struct wined3d_context *context,
 317         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 318         DWORD color_location, DWORD ds_location)
 319 {
 320     const struct wined3d_gl_info *gl_info = context->gl_info;
 321     struct fbo_entry *entry;
 322
 323     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 324     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, gl_info->limits.buffers * sizeof(*entry->render_targets));
 325     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 326     entry->depth_stencil = depth_stencil;
 327     entry->color_location = color_location;
 328     entry->ds_location = ds_location;
 329     entry->rt_mask = context_generate_rt_mask(GL_COLOR_ATTACHMENT0);
 330     entry->attached = FALSE;
 331     gl_info->fbo_ops.glGenFramebuffers(1, &entry->id);
 332     checkGLcall("glGenFramebuffers()");
 333     TRACE("Created FBO %u.\n", entry->id);
 334
 335     return entry;
 336 }
 337
 338 /* Context activation is done by the caller. */
 339 static void context_reuse_fbo_entry(struct wined3d_context *context, GLenum target,
 340         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 341         DWORD color_location, DWORD ds_location, struct fbo_entry *entry)
 342 {
 343     const struct wined3d_gl_info *gl_info = context->gl_info;
 344
 345     context_bind_fbo(context, target, entry->id);
 346     context_clean_fbo_attachments(gl_info, target);
 347
 348     memcpy(entry->render_targets, render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets));
 349     entry->depth_stencil = depth_stencil;
 350     entry->color_location = color_location;
 351     entry->ds_location = ds_location;
 352     entry->attached = FALSE;
 353 }
 354
 355 /* Context activation is done by the caller. */
 356 static void context_destroy_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 357 {
 358     if (entry->id)
 359     {
 360         TRACE("Destroy FBO %u.\n", entry->id);
 361         context_destroy_fbo(context, entry->id);
 362     }
 363     --context->fbo_entry_count;
 364     list_remove(&entry->entry);
 365     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 366     HeapFree(GetProcessHeap(), 0, entry);
 367 }
 368
 369 /* Context activation is done by the caller. */
 370 static struct fbo_entry *context_find_fbo_entry(struct wined3d_context *context, GLenum target,
 371         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 372         DWORD color_location, DWORD ds_location)
 373 {
 374     const struct wined3d_gl_info *gl_info = context->gl_info;
 375     struct fbo_entry *entry;
 376
 377     if (depth_stencil && render_targets && render_targets[0])
 378     {
 379         if (depth_stencil->resource.width < render_targets[0]->resource.width ||
 380             depth_stencil->resource.height < render_targets[0]->resource.height)
 381         {
 382             WARN("Depth stencil is smaller than the primary color buffer, disabling\n");
 383             depth_stencil = NULL;
 384         }
 385     }
 386
 387     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 388     {
 389         if (!memcmp(entry->render_targets,
 390                 render_targets, gl_info->limits.buffers * sizeof(*entry->render_targets))
 391                 && entry->depth_stencil == depth_stencil && entry->color_location == color_location
 392                 && entry->ds_location == ds_location)
 393         {
 394             list_remove(&entry->entry);
 395             list_add_head(&context->fbo_list, &entry->entry);
 396             return entry;
 397         }
 398     }
 399
 400     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 401     {
 402         entry = context_create_fbo_entry(context, render_targets, depth_stencil, color_location, ds_location);
 403         list_add_head(&context->fbo_list, &entry->entry);
 404         ++context->fbo_entry_count;
 405     }
 406     else
 407     {
 408         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 409         context_reuse_fbo_entry(context, target, render_targets, depth_stencil, color_location, ds_location, entry);
 410         list_remove(&entry->entry);
 411         list_add_head(&context->fbo_list, &entry->entry);
 412     }
 413
 414     return entry;
 415 }
 416
 417 /* Context activation is done by the caller. */
 418 static void context_apply_fbo_entry(struct wined3d_context *context, GLenum target, struct fbo_entry *entry)
 419 {
 420     const struct wined3d_gl_info *gl_info = context->gl_info;
 421     unsigned int i;
 422     GLuint read_binding, draw_binding;
 423     struct wined3d_surface *depth_stencil = entry->depth_stencil;
 424
 425     if (entry->attached)
 426     {
 427         context_bind_fbo(context, target, entry->id);
 428         return;
 429     }
 430
 431     read_binding = context->fbo_read_binding;
 432     draw_binding = context->fbo_draw_binding;
 433     context_bind_fbo(context, GL_FRAMEBUFFER, entry->id);
 434
 435     /* Apply render targets */
 436     for (i = 0; i < gl_info->limits.buffers; ++i)
 437     {
 438         context_attach_surface_fbo(context, target, i, entry->render_targets[i], entry->color_location);
 439     }
 440
 441     if (depth_stencil && entry->render_targets[0]
 442             && (depth_stencil->resource.multisample_type
 443             != entry->render_targets[0]->resource.multisample_type
 444             || depth_stencil->resource.multisample_quality
 445             != entry->render_targets[0]->resource.multisample_quality))
 446     {
 447         WARN("Color multisample type %u and quality %u, depth stencil has %u and %u, disabling ds buffer.\n",
 448                 entry->render_targets[0]->resource.multisample_quality,
 449                 entry->render_targets[0]->resource.multisample_type,
 450                 depth_stencil->resource.multisample_quality, depth_stencil->resource.multisample_type);
 451         depth_stencil = NULL;
 452     }
 453
 454     if (depth_stencil)
 455         surface_set_compatible_renderbuffer(depth_stencil, entry->render_targets[0]);
 456     context_attach_depth_stencil_fbo(context, target, depth_stencil, entry->ds_location);
 457
 458     /* Set valid read and draw buffer bindings to satisfy pedantic pre-ES2_compatibility
 459      * GL contexts requirements. */
 460     gl_info->gl_ops.gl.p_glReadBuffer(GL_NONE);
 461     context_set_draw_buffer(context, GL_NONE);
 462     if (target != GL_FRAMEBUFFER)
 463     {
 464         if (target == GL_READ_FRAMEBUFFER)
 465             context_bind_fbo(context, GL_DRAW_FRAMEBUFFER, draw_binding);
 466         else
 467             context_bind_fbo(context, GL_READ_FRAMEBUFFER, read_binding);
 468     }
 469
 470     entry->attached = TRUE;
 471 }
 472
 473 /* Context activation is done by the caller. */
 474 static void context_apply_fbo_state(struct wined3d_context *context, GLenum target,
 475         struct wined3d_surface **render_targets, struct wined3d_surface *depth_stencil,
 476         DWORD color_location, DWORD ds_location)
 477 {
 478     struct fbo_entry *entry, *entry2;
 479
 480     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
 481     {
 482         context_destroy_fbo_entry(context, entry);
 483     }
 484
 485     if (context->rebind_fbo)
 486     {
 487         context_bind_fbo(context, GL_FRAMEBUFFER, 0);
 488         context->rebind_fbo = FALSE;
 489     }
 490
 491     if (color_location == WINED3D_LOCATION_DRAWABLE)
 492     {
 493         context->current_fbo = NULL;
 494         context_bind_fbo(context, target, 0);
 495     }
 496     else
 497     {
 498         context->current_fbo = context_find_fbo_entry(context, target, render_targets, depth_stencil,
 499                 color_location, ds_location);
 500         context_apply_fbo_entry(context, target, context->current_fbo);
 501     }
 502 }
 503
 504 /* Context activation is done by the caller. */
 505 void context_apply_fbo_state_blit(struct wined3d_context *context, GLenum target,
 506         struct wined3d_surface *render_target, struct wined3d_surface *depth_stencil, DWORD location)
 507 {
 508     UINT clear_size = (context->gl_info->limits.buffers - 1) * sizeof(*context->blit_targets);
 509
 510     context->blit_targets[0] = render_target;
 511     if (clear_size)
 512         memset(&context->blit_targets[1], 0, clear_size);
 513     context_apply_fbo_state(context, target, context->blit_targets, depth_stencil, location, location);
 514 }
 515
 516 /* Context activation is done by the caller. */
 517 void context_alloc_occlusion_query(struct wined3d_context *context, struct wined3d_occlusion_query *query)
 518 {
 519     const struct wined3d_gl_info *gl_info = context->gl_info;
 520
 521     if (context->free_occlusion_query_count)
 522     {
 523         query->id = context->free_occlusion_queries[--context->free_occlusion_query_count];
 524     }
 525     else
 526     {
 527         if (gl_info->supported[ARB_OCCLUSION_QUERY])
 528         {
 529             GL_EXTCALL(glGenQueries(1, &query->id));
 530             checkGLcall("glGenQueries");
 531
 532             TRACE("Allocated occlusion query %u in context %p.\n", query->id, context);
 533         }
 534         else
 535         {
 536             WARN("Occlusion queries not supported, not allocating query id.\n");
 537             query->id = 0;
 538         }
 539     }
 540
 541     query->context = context;
 542     list_add_head(&context->occlusion_queries, &query->entry);
 543 }
 544
 545 void context_free_occlusion_query(struct wined3d_occlusion_query *query)
 546 {
 547     struct wined3d_context *context = query->context;
 548
 549     list_remove(&query->entry);
 550     query->context = NULL;
 551
 552     if (context->free_occlusion_query_count >= context->free_occlusion_query_size - 1)
 553     {
 554         UINT new_size = context->free_occlusion_query_size << 1;
 555         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_occlusion_queries,
 556                 new_size * sizeof(*context->free_occlusion_queries));
 557
 558         if (!new_data)
 559         {
 560             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 561             return;
 562         }
 563
 564         context->free_occlusion_query_size = new_size;
 565         context->free_occlusion_queries = new_data;
 566     }
 567
 568     context->free_occlusion_queries[context->free_occlusion_query_count++] = query->id;
 569 }
 570
 571 /* Context activation is done by the caller. */
 572 void context_alloc_event_query(struct wined3d_context *context, struct wined3d_event_query *query)
 573 {
 574     const struct wined3d_gl_info *gl_info = context->gl_info;
 575
 576     if (context->free_event_query_count)
 577     {
 578         query->object = context->free_event_queries[--context->free_event_query_count];
 579     }
 580     else
 581     {
 582         if (gl_info->supported[ARB_SYNC])
 583         {
 584             /* Using ARB_sync, not much to do here. */
 585             query->object.sync = NULL;
 586             TRACE("Allocated event query %p in context %p.\n", query->object.sync, context);
 587         }
 588         else if (gl_info->supported[APPLE_FENCE])
 589         {
 590             GL_EXTCALL(glGenFencesAPPLE(1, &query->object.id));
 591             checkGLcall("glGenFencesAPPLE");
 592
 593             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 594         }
 595         else if(gl_info->supported[NV_FENCE])
 596         {
 597             GL_EXTCALL(glGenFencesNV(1, &query->object.id));
 598             checkGLcall("glGenFencesNV");
 599
 600             TRACE("Allocated event query %u in context %p.\n", query->object.id, context);
 601         }
 602         else
 603         {
 604             WARN("Event queries not supported, not allocating query id.\n");
 605             query->object.id = 0;
 606         }
 607     }
 608
 609     query->context = context;
 610     list_add_head(&context->event_queries, &query->entry);
 611 }
 612
 613 void context_free_event_query(struct wined3d_event_query *query)
 614 {
 615     struct wined3d_context *context = query->context;
 616
 617     list_remove(&query->entry);
 618     query->context = NULL;
 619
 620     if (context->free_event_query_count >= context->free_event_query_size - 1)
 621     {
 622         UINT new_size = context->free_event_query_size << 1;
 623         union wined3d_gl_query_object *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_event_queries,
 624                 new_size * sizeof(*context->free_event_queries));
 625
 626         if (!new_data)
 627         {
 628             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->object.id, context);
 629             return;
 630         }
 631
 632         context->free_event_query_size = new_size;
 633         context->free_event_queries = new_data;
 634     }
 635
 636     context->free_event_queries[context->free_event_query_count++] = query->object;
 637 }
 638
 639 /* Context activation is done by the caller. */
 640 void context_alloc_timestamp_query(struct wined3d_context *context, struct wined3d_timestamp_query *query)
 641 {
 642     const struct wined3d_gl_info *gl_info = context->gl_info;
 643
 644     if (context->free_timestamp_query_count)
 645     {
 646         query->id = context->free_timestamp_queries[--context->free_timestamp_query_count];
 647     }
 648     else
 649     {
 650         GL_EXTCALL(glGenQueries(1, &query->id));
 651         checkGLcall("glGenQueries");
 652
 653         TRACE("Allocated timestamp query %u in context %p.\n", query->id, context);
 654     }
 655
 656     query->context = context;
 657     list_add_head(&context->timestamp_queries, &query->entry);
 658 }
 659
 660 void context_free_timestamp_query(struct wined3d_timestamp_query *query)
 661 {
 662     struct wined3d_context *context = query->context;
 663
 664     list_remove(&query->entry);
 665     query->context = NULL;
 666
 667     if (context->free_timestamp_query_count >= context->free_timestamp_query_size - 1)
 668     {
 669         UINT new_size = context->free_timestamp_query_size << 1;
 670         GLuint *new_data = HeapReAlloc(GetProcessHeap(), 0, context->free_timestamp_queries,
 671                 new_size * sizeof(*context->free_timestamp_queries));
 672
 673         if (!new_data)
 674         {
 675             ERR("Failed to grow free list, leaking query %u in context %p.\n", query->id, context);
 676             return;
 677         }
 678
 679         context->free_timestamp_query_size = new_size;
 680         context->free_timestamp_queries = new_data;
 681     }
 682
 683     context->free_timestamp_queries[context->free_timestamp_query_count++] = query->id;
 684 }
 685
 686 typedef void (context_fbo_entry_func_t)(struct wined3d_context *context, struct fbo_entry *entry);
 687
 688 static void context_enum_surface_fbo_entries(const struct wined3d_device *device,
 689         const struct wined3d_surface *surface, context_fbo_entry_func_t *callback)
 690 {
 691     UINT i;
 692
 693     for (i = 0; i < device->context_count; ++i)
 694     {
 695         struct wined3d_context *context = device->contexts[i];
 696         const struct wined3d_gl_info *gl_info = context->gl_info;
 697         struct fbo_entry *entry, *entry2;
 698
 699         if (context->current_rt == surface) context->current_rt = NULL;
 700
 701         LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 702         {
 703             UINT j;
 704
 705             if (entry->depth_stencil == surface)
 706             {
 707                 callback(context, entry);
 708                 continue;
 709             }
 710
 711             for (j = 0; j < gl_info->limits.buffers; ++j)
 712             {
 713                 if (entry->render_targets[j] == surface)
 714                 {
 715                     callback(context, entry);
 716                     break;
 717                 }
 718             }
 719         }
 720     }
 721 }
 722
 723 static void context_queue_fbo_entry_destruction(struct wined3d_context *context, struct fbo_entry *entry)
 724 {
 725     list_remove(&entry->entry);
 726     list_add_head(&context->fbo_destroy_list, &entry->entry);
 727 }
 728
 729 void context_resource_released(const struct wined3d_device *device,
 730         struct wined3d_resource *resource, enum wined3d_resource_type type)
 731 {
 732     if (!device->d3d_initialized) return;
 733
 734     switch (type)
 735     {
 736         case WINED3D_RTYPE_SURFACE:
 737             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 738                     context_queue_fbo_entry_destruction);
 739             break;
 740
 741         default:
 742             break;
 743     }
 744 }
 745
 746 static void context_detach_fbo_entry(struct wined3d_context *context, struct fbo_entry *entry)
 747 {
 748     entry->attached = FALSE;
 749 }
 750
 751 void context_resource_unloaded(const struct wined3d_device *device,
 752         struct wined3d_resource *resource, enum wined3d_resource_type type)
 753 {
 754     switch (type)
 755     {
 756         case WINED3D_RTYPE_SURFACE:
 757             context_enum_surface_fbo_entries(device, surface_from_resource(resource),
 758                     context_detach_fbo_entry);
 759             break;
 760
 761         default:
 762             break;
 763     }
 764 }
 765
 766 void context_surface_update(struct wined3d_context *context, const struct wined3d_surface *surface)
 767 {
 768     const struct wined3d_gl_info *gl_info = context->gl_info;
 769     struct fbo_entry *entry = context->current_fbo;
 770     unsigned int i;
 771
 772     if (!entry || context->rebind_fbo) return;
 773
 774     for (i = 0; i < gl_info->limits.buffers; ++i)
 775     {
 776         if (surface == entry->render_targets[i])
 777         {
 778             TRACE("Updated surface %p is bound as color attachment %u to the current FBO.\n", surface, i);
 779             context->rebind_fbo = TRUE;
 780             return;
 781         }
 782     }
 783
 784     if (surface == entry->depth_stencil)
 785     {
 786         TRACE("Updated surface %p is bound as depth attachment to the current FBO.\n", surface);
 787         context->rebind_fbo = TRUE;
 788     }
 789 }
 790
 791 static BOOL context_restore_pixel_format(struct wined3d_context *ctx)
 792 {
 793     const struct wined3d_gl_info *gl_info = ctx->gl_info;
 794     BOOL ret = FALSE;
 795
 796     if (ctx->restore_pf && IsWindow(ctx->restore_pf_win))
 797     {
 798         if (ctx->gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 799         {
 800             HDC dc = GetDC(ctx->restore_pf_win);
 801             if (dc)
 802             {
 803                 if (!(ret = GL_EXTCALL(wglSetPixelFormatWINE(dc, ctx->restore_pf))))
 804                 {
 805                     ERR("wglSetPixelFormatWINE failed to restore pixel format %d on window %p.\n",
 806                             ctx->restore_pf, ctx->restore_pf_win);
 807                 }
 808                 ReleaseDC(ctx->restore_pf_win, dc);
 809             }
 810         }
 811         else
 812         {
 813             ERR("can't restore pixel format %d on window %p\n", ctx->restore_pf, ctx->restore_pf_win);
 814         }
 815     }
 816
 817     ctx->restore_pf = 0;
 818     ctx->restore_pf_win = NULL;
 819     return ret;
 820 }
 821
 822 static BOOL context_set_pixel_format(struct wined3d_context *context, HDC dc, BOOL private, int format)
 823 {
 824     const struct wined3d_gl_info *gl_info = context->gl_info;
 825     int current;
 826
 827     if (dc == context->hdc && context->hdc_is_private && context->hdc_has_format)
 828         return TRUE;
 829
 830     current = GetPixelFormat(dc);
 831     if (current == format) goto success;
 832
 833     if (!current)
 834     {
 835         if (!SetPixelFormat(dc, format, NULL))
 836         {
 837             /* This may also happen if the dc belongs to a destroyed window. */
 838             WARN("Failed to set pixel format %d on device context %p, last error %#x.\n",
 839                     format, dc, GetLastError());
 840             return FALSE;
 841         }
 842
 843         context->restore_pf = 0;
 844         context->restore_pf_win = private ? NULL : WindowFromDC(dc);
 845         goto success;
 846     }
 847
 848     /* By default WGL doesn't allow pixel format adjustments but we need it
 849      * here. For this reason there's a Wine specific wglSetPixelFormat()
 850      * which allows us to set the pixel format multiple times. Only use it
 851      * when really needed. */
 852     if (gl_info->supported[WGL_WINE_PIXEL_FORMAT_PASSTHROUGH])
 853     {
 854         HWND win;
 855
 856         if (!GL_EXTCALL(wglSetPixelFormatWINE(dc, format)))
 857         {
 858             ERR("wglSetPixelFormatWINE failed to set pixel format %d on device context %p.\n",
 859                     format, dc);
 860             return FALSE;
 861         }
 862
 863         win = private ? NULL : WindowFromDC(dc);
 864         if (win != context->restore_pf_win)
 865         {
 866             context_restore_pixel_format(context);
 867
 868             context->restore_pf = private ? 0 : current;
 869             context->restore_pf_win = win;
 870         }
 871
 872         goto success;
 873     }
 874
 875     /* OpenGL doesn't allow pixel format adjustments. Print an error and
 876      * continue using the old format. There's a big chance that the old
 877      * format works although with a performance hit and perhaps rendering
 878      * errors. */
 879     ERR("Unable to set pixel format %d on device context %p. Already using format %d.\n",
 880             format, dc, current);
 881     return TRUE;
 882
 883 success:
 884     if (dc == context->hdc && context->hdc_is_private)
 885         context->hdc_has_format = TRUE;
 886     return TRUE;
 887 }
 888
 889 static BOOL context_set_gl_context(struct wined3d_context *ctx)
 890 {
 891     struct wined3d_swapchain *swapchain = ctx->swapchain;
 892     BOOL backup = FALSE;
 893
 894     if (!context_set_pixel_format(ctx, ctx->hdc, ctx->hdc_is_private, ctx->pixel_format))
 895     {
 896         WARN("Failed to set pixel format %d on device context %p.\n",
 897                 ctx->pixel_format, ctx->hdc);
 898         backup = TRUE;
 899     }
 900
 901     if (backup || !wglMakeCurrent(ctx->hdc, ctx->glCtx))
 902     {
 903         HDC dc;
 904
 905         WARN("Failed to make GL context %p current on device context %p, last error %#x.\n",
 906                 ctx->glCtx, ctx->hdc, GetLastError());
 907         ctx->valid = 0;
 908         WARN("Trying fallback to the backup window.\n");
 909
 910         /* FIXME: If the context is destroyed it's no longer associated with
 911          * a swapchain, so we can't use the swapchain to get a backup dc. To
 912          * make this work windowless contexts would need to be handled by the
 913          * device. */
 914         if (ctx->destroyed)
 915         {
 916             FIXME("Unable to get backup dc for destroyed context %p.\n", ctx);
 917             context_set_current(NULL);
 918             return FALSE;
 919         }
 920
 921         if (!(dc = swapchain_get_backup_dc(swapchain)))
 922         {
 923             context_set_current(NULL);
 924             return FALSE;
 925         }
 926
 927         if (!context_set_pixel_format(ctx, dc, TRUE, ctx->pixel_format))
 928         {
 929             ERR("Failed to set pixel format %d on device context %p.\n",
 930                     ctx->pixel_format, dc);
 931             context_set_current(NULL);
 932             return FALSE;
 933         }
 934
 935         if (!wglMakeCurrent(dc, ctx->glCtx))
 936         {
 937             ERR("Fallback to backup window (dc %p) failed too, last error %#x.\n",
 938                     dc, GetLastError());
 939             context_set_current(NULL);
 940             return FALSE;
 941         }
 942
 943         ctx->valid = 1;
 944     }
 945     ctx->needs_set = 0;
 946     return TRUE;
 947 }
 948
 949 static void context_restore_gl_context(const struct wined3d_gl_info *gl_info, HDC dc, HGLRC gl_ctx)
 950 {
 951     if (!wglMakeCurrent(dc, gl_ctx))
 952     {
 953         ERR("Failed to restore GL context %p on device context %p, last error %#x.\n",
 954                 gl_ctx, dc, GetLastError());
 955         context_set_current(NULL);
 956     }
 957 }
 958
 959 static void context_update_window(struct wined3d_context *context)
 960 {
 961     if (context->win_handle == context->swapchain->win_handle)
 962         return;
 963
 964     TRACE("Updating context %p window from %p to %p.\n",
 965             context, context->win_handle, context->swapchain->win_handle);
 966
 967     if (context->hdc)
 968         wined3d_release_dc(context->win_handle, context->hdc);
 969
 970     context->win_handle = context->swapchain->win_handle;
 971     context->hdc_is_private = FALSE;
 972     context->hdc_has_format = FALSE;
 973     context->needs_set = 1;
 974     context->valid = 1;
 975
 976     if (!(context->hdc = GetDC(context->win_handle)))
 977     {
 978         ERR("Failed to get a device context for window %p.\n", context->win_handle);
 979         context->valid = 0;
 980     }
 981 }
 982
 983 static void context_destroy_gl_resources(struct wined3d_context *context)
 984 {
 985     const struct wined3d_gl_info *gl_info = context->gl_info;
 986     struct wined3d_timestamp_query *timestamp_query;
 987     struct wined3d_occlusion_query *occlusion_query;
 988     struct wined3d_event_query *event_query;
 989     struct fbo_entry *entry, *entry2;
 990     HGLRC restore_ctx;
 991     HDC restore_dc;
 992     unsigned int i;
 993
 994     restore_ctx = wglGetCurrentContext();
 995     restore_dc = wglGetCurrentDC();
 996
 997     if (restore_ctx == context->glCtx)
 998         restore_ctx = NULL;
 999     else if (context->valid)
1000         context_set_gl_context(context);
1001
1002     LIST_FOR_EACH_ENTRY(timestamp_query, &context->timestamp_queries, struct wined3d_timestamp_query, entry)
1003     {
1004         if (context->valid)
1005             GL_EXTCALL(glDeleteQueries(1, &timestamp_query->id));
1006         timestamp_query->context = NULL;
1007     }
1008
1009     LIST_FOR_EACH_ENTRY(occlusion_query, &context->occlusion_queries, struct wined3d_occlusion_query, entry)
1010     {
1011         if (context->valid && gl_info->supported[ARB_OCCLUSION_QUERY])
1012             GL_EXTCALL(glDeleteQueries(1, &occlusion_query->id));
1013         occlusion_query->context = NULL;
1014     }
1015
1016     LIST_FOR_EACH_ENTRY(event_query, &context->event_queries, struct wined3d_event_query, entry)
1017     {
1018         if (context->valid)
1019         {
1020             if (gl_info->supported[ARB_SYNC])
1021             {
1022                 if (event_query->object.sync) GL_EXTCALL(glDeleteSync(event_query->object.sync));
1023             }
1024             else if (gl_info->supported[APPLE_FENCE]) GL_EXTCALL(glDeleteFencesAPPLE(1, &event_query->object.id));
1025             else if (gl_info->supported[NV_FENCE]) GL_EXTCALL(glDeleteFencesNV(1, &event_query->object.id));
1026         }
1027         event_query->context = NULL;
1028     }
1029
1030     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_destroy_list, struct fbo_entry, entry)
1031     {
1032         if (!context->valid) entry->id = 0;
1033         context_destroy_fbo_entry(context, entry);
1034     }
1035
1036     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
1037     {
1038         if (!context->valid) entry->id = 0;
1039         context_destroy_fbo_entry(context, entry);
1040     }
1041
1042     if (context->valid)
1043     {
1044         if (context->dummy_arbfp_prog)
1045         {
1046             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
1047         }
1048
1049         if (gl_info->supported[ARB_TIMER_QUERY])
1050             GL_EXTCALL(glDeleteQueries(context->free_timestamp_query_count, context->free_timestamp_queries));
1051
1052         if (gl_info->supported[ARB_OCCLUSION_QUERY])
1053             GL_EXTCALL(glDeleteQueries(context->free_occlusion_query_count, context->free_occlusion_queries));
1054
1055         if (gl_info->supported[ARB_SYNC])
1056         {
1057             for (i = 0; i < context->free_event_query_count; ++i)
1058             {
1059                 GL_EXTCALL(glDeleteSync(context->free_event_queries[i].sync));
1060             }
1061         }
1062         else if (gl_info->supported[APPLE_FENCE])
1063         {
1064             for (i = 0; i < context->free_event_query_count; ++i)
1065             {
1066                 GL_EXTCALL(glDeleteFencesAPPLE(1, &context->free_event_queries[i].id));
1067             }
1068         }
1069         else if (gl_info->supported[NV_FENCE])
1070         {
1071             for (i = 0; i < context->free_event_query_count; ++i)
1072             {
1073                 GL_EXTCALL(glDeleteFencesNV(1, &context->free_event_queries[i].id));
1074             }
1075         }
1076
1077         checkGLcall("context cleanup");
1078     }
1079
1080     HeapFree(GetProcessHeap(), 0, context->free_timestamp_queries);
1081     HeapFree(GetProcessHeap(), 0, context->free_occlusion_queries);
1082     HeapFree(GetProcessHeap(), 0, context->free_event_queries);
1083
1084     context_restore_pixel_format(context);
1085     if (restore_ctx)
1086     {
1087         context_restore_gl_context(gl_info, restore_dc, restore_ctx);
1088     }
1089     else if (wglGetCurrentContext() && !wglMakeCurrent(NULL, NULL))
1090     {
1091         ERR("Failed to disable GL context.\n");
1092     }
1093
1094     wined3d_release_dc(context->win_handle, context->hdc);
1095
1096     if (!wglDeleteContext(context->glCtx))
1097     {
1098         DWORD err = GetLastError();
1099         ERR("wglDeleteContext(%p) failed, last error %#x.\n", context->glCtx, err);
1100     }
1101 }
1102
1103 DWORD context_get_tls_idx(void)
1104 {
1105     return wined3d_context_tls_idx;
1106 }
1107
1108 void context_set_tls_idx(DWORD idx)
1109 {
1110     wined3d_context_tls_idx = idx;
1111 }
1112
1113 struct wined3d_context *context_get_current(void)
1114 {
1115     return TlsGetValue(wined3d_context_tls_idx);
1116 }
1117
1118 BOOL context_set_current(struct wined3d_context *ctx)
1119 {
1120     struct wined3d_context *old = context_get_current();
1121
1122     if (old == ctx)
1123     {
1124         TRACE("Already using D3D context %p.\n", ctx);
1125         return TRUE;
1126     }
1127
1128     if (old)
1129     {
1130         if (old->destroyed)
1131         {
1132             TRACE("Switching away from destroyed context %p.\n", old);
1133             context_destroy_gl_resources(old);
1134             HeapFree(GetProcessHeap(), 0, (void *)old->gl_info);
1135             HeapFree(GetProcessHeap(), 0, old);
1136         }
1137         else
1138         {
1139             old->current = 0;
1140         }
1141     }
1142
1143     if (ctx)
1144     {
1145         if (!ctx->valid)
1146         {
1147             ERR("Trying to make invalid context %p current\n", ctx);
1148             return FALSE;
1149         }
1150
1151         TRACE("Switching to D3D context %p, GL context %p, device context %p.\n", ctx, ctx->glCtx, ctx->hdc);
1152         if (!context_set_gl_context(ctx))
1153             return FALSE;
1154         ctx->current = 1;
1155     }
1156     else if(wglGetCurrentContext())
1157     {
1158         TRACE("Clearing current D3D context.\n");
1159         if (!wglMakeCurrent(NULL, NULL))
1160         {
1161             DWORD err = GetLastError();
1162             ERR("Failed to clear current GL context, last error %#x.\n", err);
1163             TlsSetValue(wined3d_context_tls_idx, NULL);
1164             return FALSE;
1165         }
1166     }
1167
1168     return TlsSetValue(wined3d_context_tls_idx, ctx);
1169 }
1170
1171 void context_release(struct wined3d_context *context)
1172 {
1173     TRACE("Releasing context %p, level %u.\n", context, context->level);
1174
1175     if (WARN_ON(d3d))
1176     {
1177         if (!context->level)
1178             WARN("Context %p is not active.\n", context);
1179         else if (context != context_get_current())
1180             WARN("Context %p is not the current context.\n", context);
1181     }
1182
1183     if (!--context->level)
1184     {
1185         if (context_restore_pixel_format(context))
1186             context->needs_set = 1;
1187         if (context->restore_ctx)
1188         {
1189             TRACE("Restoring GL context %p on device context %p.\n", context->restore_ctx, context->restore_dc);
1190             context_restore_gl_context(context->gl_info, context->restore_dc, context->restore_ctx);
1191             context->restore_ctx = NULL;
1192             context->restore_dc = NULL;
1193         }
1194     }
1195 }
1196
1197 static void context_enter(struct wined3d_context *context)
1198 {
1199     TRACE("Entering context %p, level %u.\n", context, context->level + 1);
1200
1201     if (!context->level++)
1202     {
1203         const struct wined3d_context *current_context = context_get_current();
1204         HGLRC current_gl = wglGetCurrentContext();
1205
1206         if (current_gl && (!current_context || current_context->glCtx != current_gl))
1207         {
1208             TRACE("Another GL context (%p on device context %p) is already current.\n",
1209                     current_gl, wglGetCurrentDC());
1210             context->restore_ctx = current_gl;
1211             context->restore_dc = wglGetCurrentDC();
1212             context->needs_set = 1;
1213         }
1214         else if (!context->needs_set && !(context->hdc_is_private && context->hdc_has_format)
1215                     && context->pixel_format != GetPixelFormat(context->hdc))
1216             context->needs_set = 1;
1217     }
1218 }
1219
1220 void context_invalidate_state(struct wined3d_context *context, DWORD state)
1221 {
1222     DWORD rep = context->state_table[state].representative;
1223     DWORD idx;
1224     BYTE shift;
1225
1226     if (isStateDirty(context, rep)) return;
1227
1228     context->dirtyArray[context->numDirtyEntries++] = rep;
1229     idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
1230     shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
1231     context->isStateDirty[idx] |= (1 << shift);
1232 }
1233
1234 /* This function takes care of wined3d pixel format selection. */
1235 static int context_choose_pixel_format(const struct wined3d_device *device, HDC hdc,
1236         const struct wined3d_format *color_format, const struct wined3d_format *ds_format,
1237         BOOL auxBuffers, BOOL findCompatible)
1238 {
1239     int iPixelFormat=0;
1240     BYTE redBits, greenBits, blueBits, alphaBits, colorBits;
1241     BYTE depthBits=0, stencilBits=0;
1242     unsigned int current_value;
1243     unsigned int cfg_count = device->adapter->cfg_count;
1244     unsigned int i;
1245
1246     TRACE("device %p, dc %p, color_format %s, ds_format %s, aux_buffers %#x, find_compatible %#x.\n",
1247             device, hdc, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id),
1248             auxBuffers, findCompatible);
1249
1250     if (!getColorBits(color_format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
1251     {
1252         ERR("Unable to get color bits for format %s (%#x)!\n",
1253                 debug_d3dformat(color_format->id), color_format->id);
1254         return 0;
1255     }
1256
1257     getDepthStencilBits(ds_format, &depthBits, &stencilBits);
1258
1259     current_value = 0;
1260     for (i = 0; i < cfg_count; ++i)
1261     {
1262         const struct wined3d_pixel_format *cfg = &device->adapter->cfgs[i];
1263         unsigned int value;
1264
1265         /* For now only accept RGBA formats. Perhaps some day we will
1266          * allow floating point formats for pbuffers. */
1267         if (cfg->iPixelType != WGL_TYPE_RGBA_ARB)
1268             continue;
1269         /* In window mode we need a window drawable format and double buffering. */
1270         if (!(cfg->windowDrawable && cfg->doubleBuffer))
1271             continue;
1272         if (cfg->redSize < redBits)
1273             continue;
1274         if (cfg->greenSize < greenBits)
1275             continue;
1276         if (cfg->blueSize < blueBits)
1277             continue;
1278         if (cfg->alphaSize < alphaBits)
1279             continue;
1280         if (cfg->depthSize < depthBits)
1281             continue;
1282         if (stencilBits && cfg->stencilSize != stencilBits)
1283             continue;
1284         /* Check multisampling support. */
1285         if (cfg->numSamples)
1286             continue;
1287
1288         value = 1;
1289         /* We try to locate a format which matches our requirements exactly. In case of
1290          * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
1291         if (cfg->depthSize == depthBits)
1292             value += 1;
1293         if (cfg->stencilSize == stencilBits)
1294             value += 2;
1295         if (cfg->alphaSize == alphaBits)
1296             value += 4;
1297         /* We like to have aux buffers in backbuffer mode */
1298         if (auxBuffers && cfg->auxBuffers)
1299             value += 8;
1300         if (cfg->redSize == redBits
1301                 && cfg->greenSize == greenBits
1302                 && cfg->blueSize == blueBits)
1303             value += 16;
1304
1305         if (value > current_value)
1306         {
1307             iPixelFormat = cfg->iPixelFormat;
1308             current_value = value;
1309         }
1310     }
1311
1312     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
1313     if(!iPixelFormat && !findCompatible) {
1314         ERR("Can't find a suitable iPixelFormat\n");
1315         return FALSE;
1316     } else if(!iPixelFormat) {
1317         PIXELFORMATDESCRIPTOR pfd;
1318
1319         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
1320         /* PixelFormat selection */
1321         ZeroMemory(&pfd, sizeof(pfd));
1322         pfd.nSize      = sizeof(pfd);
1323         pfd.nVersion   = 1;
1324         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
1325         pfd.iPixelType = PFD_TYPE_RGBA;
1326         pfd.cAlphaBits = alphaBits;
1327         pfd.cColorBits = colorBits;
1328         pfd.cDepthBits = depthBits;
1329         pfd.cStencilBits = stencilBits;
1330         pfd.iLayerType = PFD_MAIN_PLANE;
1331
1332         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
1333         if(!iPixelFormat) {
1334             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
1335             ERR("Can't find a suitable iPixelFormat\n");
1336             return FALSE;
1337         }
1338     }
1339
1340     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
1341             iPixelFormat, debug_d3dformat(color_format->id), debug_d3dformat(ds_format->id));
1342     return iPixelFormat;
1343 }
1344
1345 /* Context activation is done by the caller. */
1346 static void bind_dummy_textures(const struct wined3d_device *device, const struct wined3d_context *context)
1347 {
1348     const struct wined3d_gl_info *gl_info = context->gl_info;
1349     unsigned int i, count = min(MAX_COMBINED_SAMPLERS, gl_info->limits.combined_samplers);
1350
1351     for (i = 0; i < count; ++i)
1352     {
1353         GL_EXTCALL(glActiveTexture(GL_TEXTURE0 + i));
1354         checkGLcall("glActiveTexture");
1355
1356         gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[i]);
1357         checkGLcall("glBindTexture");
1358
1359         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1360         {
1361             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[i]);
1362             checkGLcall("glBindTexture");
1363         }
1364
1365         if (gl_info->supported[EXT_TEXTURE3D])
1366         {
1367             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[i]);
1368             checkGLcall("glBindTexture");
1369         }
1370
1371         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1372         {
1373             gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[i]);
1374             checkGLcall("glBindTexture");
1375         }
1376     }
1377 }
1378
1379 static BOOL context_debug_output_enabled(const struct wined3d_gl_info *gl_info)
1380 {
1381     return gl_info->supported[ARB_DEBUG_OUTPUT]
1382             && (ERR_ON(d3d) || FIXME_ON(d3d) || WARN_ON(d3d_perf));
1383 }
1384
1385 static void WINE_GLAPI wined3d_debug_callback(GLenum source, GLenum type, GLuint id,
1386         GLenum severity, GLsizei length, const char *message, void *ctx)
1387 {
1388     switch (type)
1389     {
1390         case GL_DEBUG_TYPE_ERROR_ARB:
1391             ERR("%p: %s.\n", ctx, debugstr_an(message, length));
1392             break;
1393
1394         case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB:
1395         case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB:
1396         case GL_DEBUG_TYPE_PORTABILITY_ARB:
1397             FIXME("%p: %s.\n", ctx, debugstr_an(message, length));
1398             break;
1399
1400         case GL_DEBUG_TYPE_PERFORMANCE_ARB:
1401             WARN_(d3d_perf)("%p: %s.\n", ctx, debugstr_an(message, length));
1402             break;
1403
1404         default:
1405             FIXME("ctx %p, type %#x: %s.\n", ctx, type, debugstr_an(message, length));
1406             break;
1407     }
1408 }
1409
1410 HGLRC context_create_wgl_attribs(const struct wined3d_gl_info *gl_info, HDC hdc, HGLRC share_ctx)
1411 {
1412     HGLRC ctx;
1413     unsigned int ctx_attrib_idx = 0;
1414     GLint ctx_attribs[7], ctx_flags = 0;
1415
1416     if (context_debug_output_enabled(gl_info))
1417         ctx_flags = WGL_CONTEXT_DEBUG_BIT_ARB;
1418     ctx_attribs[ctx_attrib_idx++] = WGL_CONTEXT_MAJOR_VERSION_ARB;
1419     ctx_attribs[ctx_attrib_idx++] = gl_info->selected_gl_version >> 16;
1420     ctx_attribs[ctx_attrib_idx++] = WGL_CONTEXT_MINOR_VERSION_ARB;
1421     ctx_attribs[ctx_attrib_idx++] = gl_info->selected_gl_version & 0xffff;
1422     if (gl_info->selected_gl_version >= MAKEDWORD_VERSION(3, 2))
1423         ctx_flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
1424     if (ctx_flags)
1425     {
1426         ctx_attribs[ctx_attrib_idx++] = WGL_CONTEXT_FLAGS_ARB;
1427         ctx_attribs[ctx_attrib_idx++] = ctx_flags;
1428     }
1429     ctx_attribs[ctx_attrib_idx] = 0;
1430
1431     if (!(ctx = gl_info->p_wglCreateContextAttribsARB(hdc, share_ctx, ctx_attribs)))
1432     {
1433         if (ctx_flags & WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
1434         {
1435             ctx_attribs[ctx_attrib_idx - 1] &= ~WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
1436             if (!(ctx = gl_info->p_wglCreateContextAttribsARB(hdc, share_ctx, ctx_attribs)))
1437                 WARN("Failed to create a WGL context with wglCreateContextAttribsARB, last error %#x.\n",
1438                         GetLastError());
1439         }
1440     }
1441     return ctx;
1442 }
1443
1444 struct wined3d_context *context_create(struct wined3d_swapchain *swapchain,
1445         struct wined3d_surface *target, const struct wined3d_format *ds_format)
1446 {
1447     struct wined3d_device *device = swapchain->device;
1448     const struct wined3d_gl_info *gl_info = &device->adapter->gl_info;
1449     const struct wined3d_format *color_format;
1450     struct wined3d_context *ret;
1451     BOOL auxBuffers = FALSE;
1452     HGLRC ctx, share_ctx;
1453     int pixel_format;
1454     unsigned int s;
1455     int swap_interval;
1456     DWORD state;
1457     HDC hdc;
1458     BOOL hdc_is_private = FALSE;
1459
1460     TRACE("swapchain %p, target %p, window %p.\n", swapchain, target, swapchain->win_handle);
1461
1462     ret = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ret));
1463     if (!ret)
1464         return NULL;
1465
1466     ret->blit_targets = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1467             gl_info->limits.buffers * sizeof(*ret->blit_targets));
1468     if (!ret->blit_targets)
1469         goto out;
1470
1471     ret->draw_buffers = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
1472             gl_info->limits.buffers * sizeof(*ret->draw_buffers));
1473     if (!ret->draw_buffers)
1474         goto out;
1475
1476     ret->free_timestamp_query_size = 4;
1477     ret->free_timestamp_queries = HeapAlloc(GetProcessHeap(), 0,
1478             ret->free_timestamp_query_size * sizeof(*ret->free_timestamp_queries));
1479     if (!ret->free_timestamp_queries)
1480         goto out;
1481     list_init(&ret->timestamp_queries);
1482
1483     ret->free_occlusion_query_size = 4;
1484     ret->free_occlusion_queries = HeapAlloc(GetProcessHeap(), 0,
1485             ret->free_occlusion_query_size * sizeof(*ret->free_occlusion_queries));
1486     if (!ret->free_occlusion_queries)
1487         goto out;
1488
1489     list_init(&ret->occlusion_queries);
1490
1491     ret->free_event_query_size = 4;
1492     ret->free_event_queries = HeapAlloc(GetProcessHeap(), 0,
1493             ret->free_event_query_size * sizeof(*ret->free_event_queries));
1494     if (!ret->free_event_queries)
1495         goto out;
1496
1497     list_init(&ret->event_queries);
1498     list_init(&ret->fbo_list);
1499     list_init(&ret->fbo_destroy_list);
1500
1501     if (!device->shader_backend->shader_allocate_context_data(ret))
1502     {
1503         ERR("Failed to allocate shader backend context data.\n");
1504         goto out;
1505     }
1506     if (!device->adapter->fragment_pipe->allocate_context_data(ret))
1507     {
1508         ERR("Failed to allocate fragment pipeline context data.\n");
1509         goto out;
1510     }
1511
1512     /* Initialize the texture unit mapping to a 1:1 mapping */
1513     for (s = 0; s < MAX_COMBINED_SAMPLERS; ++s)
1514     {
1515         if (s < gl_info->limits.fragment_samplers)
1516         {
1517             ret->tex_unit_map[s] = s;
1518             ret->rev_tex_unit_map[s] = s;
1519         }
1520         else
1521         {
1522             ret->tex_unit_map[s] = WINED3D_UNMAPPED_STAGE;
1523             ret->rev_tex_unit_map[s] = WINED3D_UNMAPPED_STAGE;
1524         }
1525     }
1526
1527     if (!(hdc = GetDC(swapchain->win_handle)))
1528     {
1529         WARN("Failed to retrieve device context, trying swapchain backup.\n");
1530
1531         if ((hdc = swapchain_get_backup_dc(swapchain)))
1532             hdc_is_private = TRUE;
1533         else
1534         {
1535             ERR("Failed to retrieve a device context.\n");
1536             goto out;
1537         }
1538     }
1539
1540     color_format = target->resource.format;
1541
1542     /* In case of ORM_BACKBUFFER, make sure to request an alpha component for
1543      * X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
1544     if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER)
1545     {
1546         auxBuffers = TRUE;
1547
1548         if (color_format->id == WINED3DFMT_B4G4R4X4_UNORM)
1549             color_format = wined3d_get_format(gl_info, WINED3DFMT_B4G4R4A4_UNORM);
1550         else if (color_format->id == WINED3DFMT_B8G8R8X8_UNORM)
1551             color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1552     }
1553
1554     /* DirectDraw supports 8bit paletted render targets and these are used by
1555      * old games like StarCraft and C&C. Most modern hardware doesn't support
1556      * 8bit natively so we perform some form of 8bit -> 32bit conversion. The
1557      * conversion (ab)uses the alpha component for storing the palette index.
1558      * For this reason we require a format with 8bit alpha, so request
1559      * A8R8G8B8. */
1560     if (color_format->id == WINED3DFMT_P8_UINT)
1561         color_format = wined3d_get_format(gl_info, WINED3DFMT_B8G8R8A8_UNORM);
1562
1563     /* Try to find a pixel format which matches our requirements. */
1564     pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, FALSE);
1565
1566     /* Try to locate a compatible format if we weren't able to find anything. */
1567     if (!pixel_format)
1568     {
1569         TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
1570         pixel_format = context_choose_pixel_format(device, hdc, color_format, ds_format, auxBuffers, TRUE);
1571     }
1572
1573     /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
1574     if (!pixel_format)
1575     {
1576         ERR("Can't find a suitable pixel format.\n");
1577         goto out;
1578     }
1579
1580     context_enter(ret);
1581
1582     ret->gl_info = gl_info;
1583
1584     if (!context_set_pixel_format(ret, hdc, hdc_is_private, pixel_format))
1585     {
1586         ERR("Failed to set pixel format %d on device context %p.\n", pixel_format, hdc);
1587         context_release(ret);
1588         goto out;
1589     }
1590
1591     share_ctx = device->context_count ? device->contexts[0]->glCtx : NULL;
1592     if (gl_info->p_wglCreateContextAttribsARB)
1593     {
1594         if (!(ctx = context_create_wgl_attribs(gl_info, hdc, share_ctx)))
1595             goto out;
1596     }
1597     else
1598     {
1599         if (!(ctx = wglCreateContext(hdc)))
1600         {
1601             ERR("Failed to create a WGL context.\n");
1602             context_release(ret);
1603             goto out;
1604         }
1605
1606         if (share_ctx && !wglShareLists(share_ctx, ctx))
1607         {
1608             ERR("wglShareLists(%p, %p) failed, last error %#x.\n", share_ctx, ctx, GetLastError());
1609             context_release(ret);
1610             if (!wglDeleteContext(ctx))
1611                 ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1612             goto out;
1613         }
1614     }
1615
1616     if (!device_context_add(device, ret))
1617     {
1618         ERR("Failed to add the newly created context to the context list\n");
1619         context_release(ret);
1620         if (!wglDeleteContext(ctx))
1621             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1622         goto out;
1623     }
1624
1625     ret->d3d_info = &device->adapter->d3d_info;
1626     ret->state_table = device->StateTable;
1627
1628     /* Mark all states dirty to force a proper initialization of the states
1629      * on the first use of the context. */
1630     for (state = 0; state <= STATE_HIGHEST; ++state)
1631     {
1632         if (ret->state_table[state].representative)
1633             context_invalidate_state(ret, state);
1634     }
1635
1636     ret->swapchain = swapchain;
1637     ret->current_rt = target;
1638     ret->tid = GetCurrentThreadId();
1639
1640     ret->render_offscreen = wined3d_resource_is_offscreen(&target->container->resource);
1641     ret->draw_buffers_mask = context_generate_rt_mask(GL_BACK);
1642     ret->valid = 1;
1643
1644     ret->glCtx = ctx;
1645     ret->win_handle = swapchain->win_handle;
1646     ret->hdc = hdc;
1647     ret->hdc_is_private = hdc_is_private;
1648     ret->hdc_has_format = TRUE;
1649     ret->pixel_format = pixel_format;
1650     ret->needs_set = 1;
1651
1652     /* Set up the context defaults */
1653     if (!context_set_current(ret))
1654     {
1655         ERR("Cannot activate context to set up defaults.\n");
1656         device_context_remove(device, ret);
1657         context_release(ret);
1658         if (!wglDeleteContext(ctx))
1659             ERR("wglDeleteContext(%p) failed, last error %#x.\n", ctx, GetLastError());
1660         goto out;
1661     }
1662
1663     if (context_debug_output_enabled(gl_info))
1664     {
1665         GL_EXTCALL(glDebugMessageCallbackARB(wined3d_debug_callback, ret));
1666         if (TRACE_ON(d3d_synchronous))
1667             gl_info->gl_ops.gl.p_glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1668         GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, NULL, GL_FALSE));
1669         if (ERR_ON(d3d))
1670         {
1671             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_ERROR_ARB,
1672                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1673         }
1674         if (FIXME_ON(d3d))
1675         {
1676             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB,
1677                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1678             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB,
1679                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1680             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_PORTABILITY_ARB,
1681                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1682         }
1683         if (WARN_ON(d3d_perf))
1684         {
1685             GL_EXTCALL(glDebugMessageControlARB(GL_DONT_CARE, GL_DEBUG_TYPE_PERFORMANCE_ARB,
1686                     GL_DONT_CARE, 0, NULL, GL_TRUE));
1687         }
1688     }
1689
1690     switch (swapchain->desc.swap_interval)
1691     {
1692         case WINED3DPRESENT_INTERVAL_IMMEDIATE:
1693             swap_interval = 0;
1694             break;
1695         case WINED3DPRESENT_INTERVAL_DEFAULT:
1696         case WINED3DPRESENT_INTERVAL_ONE:
1697             swap_interval = 1;
1698             break;
1699         case WINED3DPRESENT_INTERVAL_TWO:
1700             swap_interval = 2;
1701             break;
1702         case WINED3DPRESENT_INTERVAL_THREE:
1703             swap_interval = 3;
1704             break;
1705         case WINED3DPRESENT_INTERVAL_FOUR:
1706             swap_interval = 4;
1707             break;
1708         default:
1709             FIXME("Unknown swap interval %#x.\n", swapchain->desc.swap_interval);
1710             swap_interval = 1;
1711     }
1712
1713     if (gl_info->supported[WGL_EXT_SWAP_CONTROL])
1714     {
1715         if (!GL_EXTCALL(wglSwapIntervalEXT(swap_interval)))
1716             ERR("wglSwapIntervalEXT failed to set swap interval %d for context %p, last error %#x\n",
1717                 swap_interval, ret, GetLastError());
1718     }
1719
1720     gl_info->gl_ops.gl.p_glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
1721
1722     TRACE("Setting up the screen\n");
1723
1724     gl_info->gl_ops.gl.p_glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1725     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1726
1727     gl_info->gl_ops.gl.p_glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1728     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1729
1730     gl_info->gl_ops.gl.p_glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1731     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1732
1733     gl_info->gl_ops.gl.p_glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);
1734     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, device->surface_alignment);");
1735     gl_info->gl_ops.gl.p_glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
1736     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, device->surface_alignment);");
1737
1738     if (!gl_info->supported[WINED3D_GL_LEGACY_CONTEXT])
1739     {
1740         GLuint vao;
1741
1742         GL_EXTCALL(glGenVertexArrays(1, &vao));
1743         GL_EXTCALL(glBindVertexArray(vao));
1744         checkGLcall("creating VAO");
1745     }
1746
1747     if (gl_info->supported[ARB_VERTEX_BLEND])
1748     {
1749         /* Direct3D always uses n-1 weights for n world matrices and uses
1750          * 1 - sum for the last one this is equal to GL_WEIGHT_SUM_UNITY_ARB.
1751          * Enabling it doesn't do anything unless GL_VERTEX_BLEND_ARB isn't
1752          * enabled as well. */
1753         gl_info->gl_ops.gl.p_glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1754         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1755     }
1756     if (gl_info->supported[NV_TEXTURE_SHADER2])
1757     {
1758         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1759          * the previous texture where to source the offset from is always unit - 1.
1760          */
1761         for (s = 1; s < gl_info->limits.textures; ++s)
1762         {
1763             context_active_texture(ret, gl_info, s);
1764             gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_SHADER_NV,
1765                     GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1766             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...");
1767         }
1768     }
1769     if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
1770     {
1771         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1772          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1773          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1774          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1775          * is ever assigned.
1776          *
1777          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1778          * program and the dummy program is destroyed when the context is destroyed.
1779          */
1780         static const char dummy_program[] =
1781                 "!!ARBfp1.0\n"
1782                 "MOV result.color, fragment.color.primary;\n"
1783                 "END\n";
1784         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1785         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1786         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1787     }
1788
1789     if (gl_info->supported[ARB_POINT_SPRITE])
1790     {
1791         for (s = 0; s < gl_info->limits.textures; ++s)
1792         {
1793             context_active_texture(ret, gl_info, s);
1794             gl_info->gl_ops.gl.p_glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1795             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)");
1796         }
1797     }
1798
1799     if (gl_info->supported[ARB_PROVOKING_VERTEX])
1800     {
1801         GL_EXTCALL(glProvokingVertex(GL_FIRST_VERTEX_CONVENTION));
1802     }
1803     else if (gl_info->supported[EXT_PROVOKING_VERTEX])
1804     {
1805         GL_EXTCALL(glProvokingVertexEXT(GL_FIRST_VERTEX_CONVENTION_EXT));
1806     }
1807     device->shader_backend->shader_init_context_state(ret);
1808     ret->shader_update_mask = (1 << WINED3D_SHADER_TYPE_PIXEL)
1809             | (1 << WINED3D_SHADER_TYPE_VERTEX)
1810             | (1 << WINED3D_SHADER_TYPE_GEOMETRY);
1811
1812     /* If this happens to be the first context for the device, dummy textures
1813      * are not created yet. In that case, they will be created (and bound) by
1814      * create_dummy_textures right after this context is initialized. */
1815     if (device->dummy_texture_2d[0])
1816         bind_dummy_textures(device, ret);
1817
1818     TRACE("Created context %p.\n", ret);
1819
1820     return ret;
1821
1822 out:
1823     device->shader_backend->shader_free_context_data(ret);
1824     device->adapter->fragment_pipe->free_context_data(ret);
1825     HeapFree(GetProcessHeap(), 0, ret->free_event_queries);
1826     HeapFree(GetProcessHeap(), 0, ret->free_occlusion_queries);
1827     HeapFree(GetProcessHeap(), 0, ret->free_timestamp_queries);
1828     HeapFree(GetProcessHeap(), 0, ret->draw_buffers);
1829     HeapFree(GetProcessHeap(), 0, ret->blit_targets);
1830     HeapFree(GetProcessHeap(), 0, ret);
1831     return NULL;
1832 }
1833
1834 void context_destroy(struct wined3d_device *device, struct wined3d_context *context)
1835 {
1836     BOOL destroy;
1837
1838     TRACE("Destroying ctx %p\n", context);
1839
1840     if (context->tid == GetCurrentThreadId() || !context->current)
1841     {
1842         context_destroy_gl_resources(context);
1843         TlsSetValue(wined3d_context_tls_idx, NULL);
1844         destroy = TRUE;
1845     }
1846     else
1847     {
1848         /* Make a copy of gl_info for context_destroy_gl_resources use, the one
1849            in wined3d_adapter may go away in the meantime */
1850         struct wined3d_gl_info *gl_info = HeapAlloc(GetProcessHeap(), 0, sizeof(*gl_info));
1851         *gl_info = *context->gl_info;
1852         context->gl_info = gl_info;
1853         context->destroyed = 1;
1854         destroy = FALSE;
1855     }
1856
1857     device->shader_backend->shader_free_context_data(context);
1858     device->adapter->fragment_pipe->free_context_data(context);
1859     HeapFree(GetProcessHeap(), 0, context->draw_buffers);
1860     HeapFree(GetProcessHeap(), 0, context->blit_targets);
1861     device_context_remove(device, context);
1862     if (destroy) HeapFree(GetProcessHeap(), 0, context);
1863 }
1864
1865 /* Context activation is done by the caller. */
1866 static void set_blit_dimension(const struct wined3d_gl_info *gl_info, UINT width, UINT height)
1867 {
1868     const GLdouble projection[] =
1869     {
1870         2.0 / width,          0.0,  0.0, 0.0,
1871                 0.0, 2.0 / height,  0.0, 0.0,
1872                 0.0,          0.0,  2.0, 0.0,
1873                -1.0,         -1.0, -1.0, 1.0,
1874     };
1875
1876     gl_info->gl_ops.gl.p_glMatrixMode(GL_PROJECTION);
1877     checkGLcall("glMatrixMode(GL_PROJECTION)");
1878     gl_info->gl_ops.gl.p_glLoadMatrixd(projection);
1879     checkGLcall("glLoadMatrixd");
1880     gl_info->gl_ops.gl.p_glViewport(0, 0, width, height);
1881     checkGLcall("glViewport");
1882 }
1883
1884 static void context_get_rt_size(const struct wined3d_context *context, SIZE *size)
1885 {
1886     const struct wined3d_surface *rt = context->current_rt;
1887
1888     if (rt->container->swapchain && rt->container->swapchain->front_buffer == rt->container)
1889     {
1890         RECT window_size;
1891
1892         GetClientRect(context->win_handle, &window_size);
1893         size->cx = window_size.right - window_size.left;
1894         size->cy = window_size.bottom - window_size.top;
1895
1896         return;
1897     }
1898
1899     size->cx = rt->resource.width;
1900     size->cy = rt->resource.height;
1901 }
1902
1903 /*****************************************************************************
1904  * SetupForBlit
1905  *
1906  * Sets up a context for DirectDraw blitting.
1907  * All texture units are disabled, texture unit 0 is set as current unit
1908  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1909  * color writing enabled for all channels
1910  * register combiners disabled, shaders disabled
1911  * world matrix is set to identity, texture matrix 0 too
1912  * projection matrix is setup for drawing screen coordinates
1913  *
1914  * Params:
1915  *  This: Device to activate the context for
1916  *  context: Context to setup
1917  *
1918  *****************************************************************************/
1919 /* Context activation is done by the caller. */
1920 static void SetupForBlit(const struct wined3d_device *device, struct wined3d_context *context)
1921 {
1922     int i;
1923     const struct wined3d_gl_info *gl_info = context->gl_info;
1924     DWORD sampler;
1925     SIZE rt_size;
1926
1927     TRACE("Setting up context %p for blitting\n", context);
1928
1929     context_get_rt_size(context, &rt_size);
1930
1931     if (context->last_was_blit)
1932     {
1933         if (context->blit_w != rt_size.cx || context->blit_h != rt_size.cy)
1934         {
1935             set_blit_dimension(gl_info, rt_size.cx, rt_size.cy);
1936             context->blit_w = rt_size.cx;
1937             context->blit_h = rt_size.cy;
1938             /* No need to dirtify here, the states are still dirtified because
1939              * they weren't applied since the last SetupForBlit() call. */
1940         }
1941         TRACE("Context is already set up for blitting, nothing to do\n");
1942         return;
1943     }
1944     context->last_was_blit = TRUE;
1945
1946     /* Disable all textures. The caller can then bind a texture it wants to blit
1947      * from
1948      *
1949      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1950      * function texture unit. No need to care for higher samplers
1951      */
1952     for (i = gl_info->limits.textures - 1; i > 0 ; --i)
1953     {
1954         sampler = context->rev_tex_unit_map[i];
1955         context_active_texture(context, gl_info, i);
1956
1957         if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1958         {
1959             gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1960             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1961         }
1962         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_3D);
1963         checkGLcall("glDisable GL_TEXTURE_3D");
1964         if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1965         {
1966             gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_RECTANGLE_ARB);
1967             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1968         }
1969         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_2D);
1970         checkGLcall("glDisable GL_TEXTURE_2D");
1971
1972         gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1973         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1974
1975         if (sampler != WINED3D_UNMAPPED_STAGE)
1976         {
1977             if (sampler < MAX_TEXTURES)
1978                 context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3D_TSS_COLOR_OP));
1979             context_invalidate_state(context, STATE_SAMPLER(sampler));
1980         }
1981     }
1982     if (gl_info->supported[ARB_SAMPLER_OBJECTS])
1983         GL_EXTCALL(glBindSampler(0, 0));
1984     context_active_texture(context, gl_info, 0);
1985
1986     sampler = context->rev_tex_unit_map[0];
1987
1988     if (gl_info->supported[ARB_TEXTURE_CUBE_MAP])
1989     {
1990         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1991         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1992     }
1993     gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_3D);
1994     checkGLcall("glDisable GL_TEXTURE_3D");
1995     if (gl_info->supported[ARB_TEXTURE_RECTANGLE])
1996     {
1997         gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_RECTANGLE_ARB);
1998         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1999     }
2000     gl_info->gl_ops.gl.p_glDisable(GL_TEXTURE_2D);
2001     checkGLcall("glDisable GL_TEXTURE_2D");
2002
2003     gl_info->gl_ops.gl.p_glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
2004
2005     gl_info->gl_ops.gl.p_glMatrixMode(GL_TEXTURE);
2006     checkGLcall("glMatrixMode(GL_TEXTURE)");
2007     gl_info->gl_ops.gl.p_glLoadIdentity();
2008     checkGLcall("glLoadIdentity()");
2009
2010     if (gl_info->supported[EXT_TEXTURE_LOD_BIAS])
2011     {
2012         gl_info->gl_ops.gl.p_glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
2013                 GL_TEXTURE_LOD_BIAS_EXT, 0.0f);
2014         checkGLcall("glTexEnvf GL_TEXTURE_LOD_BIAS_EXT ...");
2015     }
2016
2017     if (sampler != WINED3D_UNMAPPED_STAGE)
2018     {
2019         if (sampler < MAX_TEXTURES)
2020         {
2021             context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_TEXTURE0 + sampler));
2022             context_invalidate_state(context, STATE_TEXTURESTAGE(sampler, WINED3D_TSS_COLOR_OP));
2023         }
2024         context_invalidate_state(context, STATE_SAMPLER(sampler));
2025     }
2026
2027     /* Other misc states */
2028     gl_info->gl_ops.gl.p_glDisable(GL_ALPHA_TEST);
2029     checkGLcall("glDisable(GL_ALPHA_TEST)");
2030     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHATESTENABLE));
2031     gl_info->gl_ops.gl.p_glDisable(GL_LIGHTING);
2032     checkGLcall("glDisable GL_LIGHTING");
2033     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_LIGHTING));
2034     gl_info->gl_ops.gl.p_glDisable(GL_DEPTH_TEST);
2035     checkGLcall("glDisable GL_DEPTH_TEST");
2036     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ZENABLE));
2037     glDisableWINE(GL_FOG);
2038     checkGLcall("glDisable GL_FOG");
2039     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_FOGENABLE));
2040     gl_info->gl_ops.gl.p_glDisable(GL_BLEND);
2041     checkGLcall("glDisable GL_BLEND");
2042     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
2043     gl_info->gl_ops.gl.p_glDisable(GL_CULL_FACE);
2044     checkGLcall("glDisable GL_CULL_FACE");
2045     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_CULLMODE));
2046     gl_info->gl_ops.gl.p_glDisable(GL_STENCIL_TEST);
2047     checkGLcall("glDisable GL_STENCIL_TEST");
2048     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_STENCILENABLE));
2049     gl_info->gl_ops.gl.p_glDisable(GL_SCISSOR_TEST);
2050     checkGLcall("glDisable GL_SCISSOR_TEST");
2051     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SCISSORTESTENABLE));
2052     if (gl_info->supported[ARB_POINT_SPRITE])
2053     {
2054         gl_info->gl_ops.gl.p_glDisable(GL_POINT_SPRITE_ARB);
2055         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
2056         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_POINTSPRITEENABLE));
2057     }
2058     gl_info->gl_ops.gl.p_glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
2059     checkGLcall("glColorMask");
2060     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE));
2061     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE1));
2062     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE2));
2063     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_COLORWRITEENABLE3));
2064     if (gl_info->supported[EXT_SECONDARY_COLOR])
2065     {
2066         gl_info->gl_ops.gl.p_glDisable(GL_COLOR_SUM_EXT);
2067         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SPECULARENABLE));
2068         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
2069     }
2070
2071     /* Setup transforms */
2072     gl_info->gl_ops.gl.p_glMatrixMode(GL_MODELVIEW);
2073     checkGLcall("glMatrixMode(GL_MODELVIEW)");
2074     gl_info->gl_ops.gl.p_glLoadIdentity();
2075     checkGLcall("glLoadIdentity()");
2076     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_WORLD_MATRIX(0)));
2077
2078     context->last_was_rhw = TRUE;
2079     context_invalidate_state(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
2080
2081     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
2082     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
2083     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
2084     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
2085     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
2086     gl_info->gl_ops.gl.p_glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
2087     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_CLIPPING));
2088
2089     set_blit_dimension(gl_info, rt_size.cx, rt_size.cy);
2090
2091     /* Disable shaders */
2092     device->shader_backend->shader_disable(device->shader_priv, context);
2093
2094     context->blit_w = rt_size.cx;
2095     context->blit_h = rt_size.cy;
2096     context_invalidate_state(context, STATE_VIEWPORT);
2097     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_PROJECTION));
2098 }
2099
2100 static inline BOOL is_rt_mask_onscreen(DWORD rt_mask)
2101 {
2102     return rt_mask & (1 << 31);
2103 }
2104
2105 static inline GLenum draw_buffer_from_rt_mask(DWORD rt_mask)
2106 {
2107     return rt_mask & ~(1 << 31);
2108 }
2109
2110 /* Context activation is done by the caller. */
2111 static void context_apply_draw_buffers(struct wined3d_context *context, DWORD rt_mask)
2112 {
2113     const struct wined3d_gl_info *gl_info = context->gl_info;
2114
2115     if (!rt_mask)
2116     {
2117         gl_info->gl_ops.gl.p_glDrawBuffer(GL_NONE);
2118         checkGLcall("glDrawBuffer()");
2119     }
2120     else if (is_rt_mask_onscreen(rt_mask))
2121     {
2122         gl_info->gl_ops.gl.p_glDrawBuffer(draw_buffer_from_rt_mask(rt_mask));
2123         checkGLcall("glDrawBuffer()");
2124     }
2125     else
2126     {
2127         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2128         {
2129             unsigned int i = 0;
2130
2131             while (rt_mask)
2132             {
2133                 if (rt_mask & 1)
2134                     context->draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
2135                 else
2136                     context->draw_buffers[i] = GL_NONE;
2137
2138                 rt_mask >>= 1;
2139                 ++i;
2140             }
2141
2142             if (gl_info->supported[ARB_DRAW_BUFFERS])
2143             {
2144                 GL_EXTCALL(glDrawBuffers(i, context->draw_buffers));
2145                 checkGLcall("glDrawBuffers()");
2146             }
2147             else
2148             {
2149                 gl_info->gl_ops.gl.p_glDrawBuffer(context->draw_buffers[0]);
2150                 checkGLcall("glDrawBuffer()");
2151             }
2152         }
2153         else
2154         {
2155             ERR("Unexpected draw buffers mask with backbuffer ORM.\n");
2156         }
2157     }
2158 }
2159
2160 /* Context activation is done by the caller. */
2161 void context_set_draw_buffer(struct wined3d_context *context, GLenum buffer)
2162 {
2163     const struct wined3d_gl_info *gl_info = context->gl_info;
2164     DWORD *current_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2165     DWORD new_mask = context_generate_rt_mask(buffer);
2166
2167     if (new_mask == *current_mask)
2168         return;
2169
2170     gl_info->gl_ops.gl.p_glDrawBuffer(buffer);
2171     checkGLcall("glDrawBuffer()");
2172
2173     *current_mask = new_mask;
2174 }
2175
2176 /* Context activation is done by the caller. */
2177 void context_active_texture(struct wined3d_context *context, const struct wined3d_gl_info *gl_info, unsigned int unit)
2178 {
2179     GL_EXTCALL(glActiveTexture(GL_TEXTURE0 + unit));
2180     checkGLcall("glActiveTexture");
2181     context->active_texture = unit;
2182 }
2183
2184 void context_bind_texture(struct wined3d_context *context, GLenum target, GLuint name)
2185 {
2186     const struct wined3d_gl_info *gl_info = context->gl_info;
2187     DWORD unit = context->active_texture;
2188     DWORD old_texture_type = context->texture_type[unit];
2189
2190     if (name)
2191     {
2192         gl_info->gl_ops.gl.p_glBindTexture(target, name);
2193         checkGLcall("glBindTexture");
2194     }
2195     else
2196     {
2197         target = GL_NONE;
2198     }
2199
2200     if (old_texture_type != target)
2201     {
2202         const struct wined3d_device *device = context->swapchain->device;
2203
2204         switch (old_texture_type)
2205         {
2206             case GL_NONE:
2207                 /* nothing to do */
2208                 break;
2209             case GL_TEXTURE_2D:
2210                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_2D, device->dummy_texture_2d[unit]);
2211                 checkGLcall("glBindTexture");
2212                 break;
2213             case GL_TEXTURE_RECTANGLE_ARB:
2214                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_RECTANGLE_ARB, device->dummy_texture_rect[unit]);
2215                 checkGLcall("glBindTexture");
2216                 break;
2217             case GL_TEXTURE_CUBE_MAP:
2218                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_CUBE_MAP, device->dummy_texture_cube[unit]);
2219                 checkGLcall("glBindTexture");
2220                 break;
2221             case GL_TEXTURE_3D:
2222                 gl_info->gl_ops.gl.p_glBindTexture(GL_TEXTURE_3D, device->dummy_texture_3d[unit]);
2223                 checkGLcall("glBindTexture");
2224                 break;
2225             default:
2226                 ERR("Unexpected texture target %#x\n", old_texture_type);
2227         }
2228
2229         context->texture_type[unit] = target;
2230     }
2231 }
2232
2233 static void context_set_render_offscreen(struct wined3d_context *context, BOOL offscreen)
2234 {
2235     if (context->render_offscreen == offscreen) return;
2236
2237     context_invalidate_state(context, STATE_POINTSPRITECOORDORIGIN);
2238     context_invalidate_state(context, STATE_TRANSFORM(WINED3D_TS_PROJECTION));
2239     context_invalidate_state(context, STATE_VIEWPORT);
2240     context_invalidate_state(context, STATE_SCISSORRECT);
2241     context_invalidate_state(context, STATE_FRONTFACE);
2242     context->render_offscreen = offscreen;
2243 }
2244
2245 static BOOL match_depth_stencil_format(const struct wined3d_format *existing,
2246         const struct wined3d_format *required)
2247 {
2248     BYTE existing_depth, existing_stencil, required_depth, required_stencil;
2249
2250     if (existing == required)
2251         return TRUE;
2252     if ((existing->flags[WINED3D_GL_RES_TYPE_TEX_2D] & WINED3DFMT_FLAG_FLOAT)
2253             != (required->flags[WINED3D_GL_RES_TYPE_TEX_2D] & WINED3DFMT_FLAG_FLOAT))
2254         return FALSE;
2255
2256     getDepthStencilBits(existing, &existing_depth, &existing_stencil);
2257     getDepthStencilBits(required, &required_depth, &required_stencil);
2258
2259     if(existing_depth < required_depth) return FALSE;
2260     /* If stencil bits are used the exact amount is required - otherwise wrapping
2261      * won't work correctly */
2262     if(required_stencil && required_stencil != existing_stencil) return FALSE;
2263     return TRUE;
2264 }
2265
2266 /* The caller provides a context */
2267 static void context_validate_onscreen_formats(struct wined3d_context *context,
2268         const struct wined3d_rendertarget_view *depth_stencil)
2269 {
2270     /* Onscreen surfaces are always in a swapchain */
2271     struct wined3d_swapchain *swapchain = context->current_rt->container->swapchain;
2272
2273     if (context->render_offscreen || !depth_stencil) return;
2274     if (match_depth_stencil_format(swapchain->ds_format, depth_stencil->format)) return;
2275
2276     /* TODO: If the requested format would satisfy the needs of the existing one(reverse match),
2277      * or no onscreen depth buffer was created, the OpenGL drawable could be changed to the new
2278      * format. */
2279     WARN("Depth stencil format is not supported by WGL, rendering the backbuffer in an FBO\n");
2280
2281     /* The currently active context is the necessary context to access the swapchain's onscreen buffers */
2282     surface_load_location(context->current_rt, WINED3D_LOCATION_TEXTURE_RGB);
2283     swapchain->render_to_fbo = TRUE;
2284     swapchain_update_draw_bindings(swapchain);
2285     context_set_render_offscreen(context, TRUE);
2286 }
2287
2288 static DWORD context_generate_rt_mask_no_fbo(const struct wined3d_device *device, const struct wined3d_surface *rt)
2289 {
2290     if (!rt || rt->resource.format->id == WINED3DFMT_NULL)
2291         return 0;
2292     else if (rt->container->swapchain)
2293         return context_generate_rt_mask_from_surface(rt);
2294     else
2295         return context_generate_rt_mask(device->offscreenBuffer);
2296 }
2297
2298 /* Context activation is done by the caller. */
2299 void context_apply_blit_state(struct wined3d_context *context, const struct wined3d_device *device)
2300 {
2301     struct wined3d_surface *rt = context->current_rt;
2302     DWORD rt_mask, *cur_mask;
2303
2304     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2305     {
2306         context_validate_onscreen_formats(context, NULL);
2307
2308         if (context->render_offscreen)
2309         {
2310             wined3d_texture_load(rt->container, context, FALSE);
2311
2312             context_apply_fbo_state_blit(context, GL_FRAMEBUFFER, rt, NULL, rt->container->resource.draw_binding);
2313             if (rt->resource.format->id != WINED3DFMT_NULL)
2314                 rt_mask = 1;
2315             else
2316                 rt_mask = 0;
2317         }
2318         else
2319         {
2320             context->current_fbo = NULL;
2321             context_bind_fbo(context, GL_FRAMEBUFFER, 0);
2322             rt_mask = context_generate_rt_mask_from_surface(rt);
2323         }
2324     }
2325     else
2326     {
2327         rt_mask = context_generate_rt_mask_no_fbo(device, rt);
2328     }
2329
2330     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2331
2332     if (rt_mask != *cur_mask)
2333     {
2334         context_apply_draw_buffers(context, rt_mask);
2335         *cur_mask = rt_mask;
2336     }
2337
2338     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2339     {
2340         context_check_fbo_status(context, GL_FRAMEBUFFER);
2341     }
2342
2343     SetupForBlit(device, context);
2344     context_invalidate_state(context, STATE_FRAMEBUFFER);
2345 }
2346
2347 static BOOL context_validate_rt_config(UINT rt_count, struct wined3d_rendertarget_view * const *rts,
2348         const struct wined3d_rendertarget_view *ds)
2349 {
2350     unsigned int i;
2351
2352     if (ds) return TRUE;
2353
2354     for (i = 0; i < rt_count; ++i)
2355     {
2356         if (rts[i] && rts[i]->format->id != WINED3DFMT_NULL)
2357             return TRUE;
2358     }
2359
2360     WARN("Invalid render target config, need at least one attachment.\n");
2361     return FALSE;
2362 }
2363
2364 /* Context activation is done by the caller. */
2365 BOOL context_apply_clear_state(struct wined3d_context *context, const struct wined3d_device *device,
2366         UINT rt_count, const struct wined3d_fb_state *fb)
2367 {
2368     struct wined3d_rendertarget_view **rts = fb->render_targets;
2369     struct wined3d_rendertarget_view *dsv = fb->depth_stencil;
2370     const struct wined3d_gl_info *gl_info = context->gl_info;
2371     DWORD rt_mask = 0, *cur_mask;
2372     UINT i;
2373
2374     if (isStateDirty(context, STATE_FRAMEBUFFER) || fb != &device->fb
2375             || rt_count != context->gl_info->limits.buffers)
2376     {
2377         if (!context_validate_rt_config(rt_count, rts, dsv))
2378             return FALSE;
2379
2380         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2381         {
2382             context_validate_onscreen_formats(context, dsv);
2383
2384             if (!rt_count || wined3d_resource_is_offscreen(rts[0]->resource))
2385             {
2386                 for (i = 0; i < rt_count; ++i)
2387                 {
2388                     context->blit_targets[i] = wined3d_rendertarget_view_get_surface(rts[i]);
2389                     if (rts[i] && rts[i]->format->id != WINED3DFMT_NULL)
2390                         rt_mask |= (1 << i);
2391                 }
2392                 while (i < context->gl_info->limits.buffers)
2393                 {
2394                     context->blit_targets[i] = NULL;
2395                     ++i;
2396                 }
2397                 context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets,
2398                         wined3d_rendertarget_view_get_surface(dsv),
2399                         rt_count ? rts[0]->resource->draw_binding : 0,
2400                         dsv ? dsv->resource->draw_binding : 0);
2401             }
2402             else
2403             {
2404                 context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL,
2405                         WINED3D_LOCATION_DRAWABLE, WINED3D_LOCATION_DRAWABLE);
2406                 rt_mask = context_generate_rt_mask_from_surface(wined3d_rendertarget_view_get_surface(rts[0]));
2407             }
2408
2409             /* If the framebuffer is not the device's fb the device's fb has to be reapplied
2410              * next draw. Otherwise we could mark the framebuffer state clean here, once the
2411              * state management allows this */
2412             context_invalidate_state(context, STATE_FRAMEBUFFER);
2413         }
2414         else
2415         {
2416             rt_mask = context_generate_rt_mask_no_fbo(device,
2417                     rt_count ? wined3d_rendertarget_view_get_surface(rts[0]) : NULL);
2418         }
2419     }
2420     else if (wined3d_settings.offscreen_rendering_mode == ORM_FBO
2421             && (!rt_count || wined3d_resource_is_offscreen(rts[0]->resource)))
2422     {
2423         for (i = 0; i < rt_count; ++i)
2424         {
2425             if (rts[i] && rts[i]->format->id != WINED3DFMT_NULL)
2426                 rt_mask |= (1 << i);
2427         }
2428     }
2429     else
2430     {
2431         rt_mask = context_generate_rt_mask_no_fbo(device,
2432                 rt_count ? wined3d_rendertarget_view_get_surface(rts[0]) : NULL);
2433     }
2434
2435     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2436
2437     if (rt_mask != *cur_mask)
2438     {
2439         context_apply_draw_buffers(context, rt_mask);
2440         *cur_mask = rt_mask;
2441         context_invalidate_state(context, STATE_FRAMEBUFFER);
2442     }
2443
2444     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2445     {
2446         context_check_fbo_status(context, GL_FRAMEBUFFER);
2447     }
2448
2449     if (context->last_was_blit)
2450         context->last_was_blit = FALSE;
2451
2452     /* Blending and clearing should be orthogonal, but tests on the nvidia
2453      * driver show that disabling blending when clearing improves the clearing
2454      * performance incredibly. */
2455     gl_info->gl_ops.gl.p_glDisable(GL_BLEND);
2456     gl_info->gl_ops.gl.p_glEnable(GL_SCISSOR_TEST);
2457     checkGLcall("glEnable GL_SCISSOR_TEST");
2458
2459     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
2460     context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SCISSORTESTENABLE));
2461     context_invalidate_state(context, STATE_SCISSORRECT);
2462
2463     return TRUE;
2464 }
2465
2466 static DWORD find_draw_buffers_mask(const struct wined3d_context *context, const struct wined3d_device *device)
2467 {
2468     const struct wined3d_state *state = &device->state;
2469     struct wined3d_rendertarget_view **rts = state->fb->render_targets;
2470     struct wined3d_shader *ps = state->shader[WINED3D_SHADER_TYPE_PIXEL];
2471     DWORD rt_mask, rt_mask_bits;
2472     unsigned int i;
2473
2474     if (wined3d_settings.offscreen_rendering_mode != ORM_FBO)
2475         return context_generate_rt_mask_no_fbo(device, wined3d_rendertarget_view_get_surface(rts[0]));
2476     else if (!context->render_offscreen)
2477         return context_generate_rt_mask_from_surface(wined3d_rendertarget_view_get_surface(rts[0]));
2478
2479     rt_mask = ps ? ps->reg_maps.rt_mask : 1;
2480     rt_mask &= context->d3d_info->valid_rt_mask;
2481     rt_mask_bits = rt_mask;
2482     i = 0;
2483     while (rt_mask_bits)
2484     {
2485         rt_mask_bits &= ~(1 << i);
2486         if (!rts[i] || rts[i]->format->id == WINED3DFMT_NULL)
2487             rt_mask &= ~(1 << i);
2488
2489         i++;
2490     }
2491
2492     return rt_mask;
2493 }
2494
2495 /* Context activation is done by the caller. */
2496 void context_state_fb(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2497 {
2498     const struct wined3d_device *device = context->swapchain->device;
2499     const struct wined3d_fb_state *fb = state->fb;
2500     DWORD rt_mask = find_draw_buffers_mask(context, device);
2501     DWORD *cur_mask;
2502
2503     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
2504     {
2505         if (!context->render_offscreen)
2506         {
2507             context_apply_fbo_state(context, GL_FRAMEBUFFER, NULL, NULL,
2508                     WINED3D_LOCATION_DRAWABLE, WINED3D_LOCATION_DRAWABLE);
2509         }
2510         else
2511         {
2512             unsigned int i;
2513
2514             for (i = 0; i < context->gl_info->limits.buffers; ++i)
2515             {
2516                 context->blit_targets[i] = wined3d_rendertarget_view_get_surface(fb->render_targets[i]);
2517             }
2518             context_apply_fbo_state(context, GL_FRAMEBUFFER, context->blit_targets,
2519                     wined3d_rendertarget_view_get_surface(fb->depth_stencil),
2520                     fb->render_targets[0]->resource->draw_binding,
2521                     fb->depth_stencil ? fb->depth_stencil->resource->draw_binding : 0);
2522         }
2523     }
2524
2525     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2526     if (rt_mask != *cur_mask)
2527     {
2528         context_apply_draw_buffers(context, rt_mask);
2529         *cur_mask = rt_mask;
2530     }
2531 }
2532
2533 static void context_map_stage(struct wined3d_context *context, DWORD stage, DWORD unit)
2534 {
2535     DWORD i = context->rev_tex_unit_map[unit];
2536     DWORD j = context->tex_unit_map[stage];
2537
2538     context->tex_unit_map[stage] = unit;
2539     if (i != WINED3D_UNMAPPED_STAGE && i != stage)
2540         context->tex_unit_map[i] = WINED3D_UNMAPPED_STAGE;
2541
2542     context->rev_tex_unit_map[unit] = stage;
2543     if (j != WINED3D_UNMAPPED_STAGE && j != unit)
2544         context->rev_tex_unit_map[j] = WINED3D_UNMAPPED_STAGE;
2545 }
2546
2547 static void context_invalidate_texture_stage(struct wined3d_context *context, DWORD stage)
2548 {
2549     DWORD i;
2550
2551     for (i = 0; i <= WINED3D_HIGHEST_TEXTURE_STATE; ++i)
2552         context_invalidate_state(context, STATE_TEXTURESTAGE(stage, i));
2553 }
2554
2555 static void context_update_fixed_function_usage_map(struct wined3d_context *context,
2556         const struct wined3d_state *state)
2557 {
2558     UINT i, start, end;
2559
2560     context->fixed_function_usage_map = 0;
2561     for (i = 0; i < MAX_TEXTURES; ++i)
2562     {
2563         enum wined3d_texture_op color_op = state->texture_states[i][WINED3D_TSS_COLOR_OP];
2564         enum wined3d_texture_op alpha_op = state->texture_states[i][WINED3D_TSS_ALPHA_OP];
2565         DWORD color_arg1 = state->texture_states[i][WINED3D_TSS_COLOR_ARG1] & WINED3DTA_SELECTMASK;
2566         DWORD color_arg2 = state->texture_states[i][WINED3D_TSS_COLOR_ARG2] & WINED3DTA_SELECTMASK;
2567         DWORD color_arg3 = state->texture_states[i][WINED3D_TSS_COLOR_ARG0] & WINED3DTA_SELECTMASK;
2568         DWORD alpha_arg1 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG1] & WINED3DTA_SELECTMASK;
2569         DWORD alpha_arg2 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG2] & WINED3DTA_SELECTMASK;
2570         DWORD alpha_arg3 = state->texture_states[i][WINED3D_TSS_ALPHA_ARG0] & WINED3DTA_SELECTMASK;
2571
2572         /* Not used, and disable higher stages. */
2573         if (color_op == WINED3D_TOP_DISABLE)
2574             break;
2575
2576         if (((color_arg1 == WINED3DTA_TEXTURE) && color_op != WINED3D_TOP_SELECT_ARG2)
2577                 || ((color_arg2 == WINED3DTA_TEXTURE) && color_op != WINED3D_TOP_SELECT_ARG1)
2578                 || ((color_arg3 == WINED3DTA_TEXTURE)
2579                     && (color_op == WINED3D_TOP_MULTIPLY_ADD || color_op == WINED3D_TOP_LERP))
2580                 || ((alpha_arg1 == WINED3DTA_TEXTURE) && alpha_op != WINED3D_TOP_SELECT_ARG2)
2581                 || ((alpha_arg2 == WINED3DTA_TEXTURE) && alpha_op != WINED3D_TOP_SELECT_ARG1)
2582                 || ((alpha_arg3 == WINED3DTA_TEXTURE)
2583                     && (alpha_op == WINED3D_TOP_MULTIPLY_ADD || alpha_op == WINED3D_TOP_LERP)))
2584             context->fixed_function_usage_map |= (1 << i);
2585
2586         if ((color_op == WINED3D_TOP_BUMPENVMAP || color_op == WINED3D_TOP_BUMPENVMAP_LUMINANCE)
2587                 && i < MAX_TEXTURES - 1)
2588             context->fixed_function_usage_map |= (1 << (i + 1));
2589     }
2590
2591     if (i < context->lowest_disabled_stage)
2592     {
2593         start = i;
2594         end = context->lowest_disabled_stage;
2595     }
2596     else
2597     {
2598         start = context->lowest_disabled_stage;
2599         end = i;
2600     }
2601
2602     context->lowest_disabled_stage = i;
2603     for (i = start + 1; i < end; ++i)
2604     {
2605         context_invalidate_state(context, STATE_TEXTURESTAGE(i, WINED3D_TSS_COLOR_OP));
2606     }
2607 }
2608
2609 static void context_map_fixed_function_samplers(struct wined3d_context *context,
2610         const struct wined3d_state *state)
2611 {
2612     unsigned int i, tex;
2613     WORD ffu_map;
2614     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2615
2616     context_update_fixed_function_usage_map(context, state);
2617     ffu_map = context->fixed_function_usage_map;
2618
2619     if (d3d_info->limits.ffp_textures == d3d_info->limits.ffp_blend_stages
2620             || context->lowest_disabled_stage <= d3d_info->limits.ffp_textures)
2621     {
2622         for (i = 0; ffu_map; ffu_map >>= 1, ++i)
2623         {
2624             if (!(ffu_map & 1))
2625                 continue;
2626
2627             if (context->tex_unit_map[i] != i)
2628             {
2629                 context_map_stage(context, i, i);
2630                 context_invalidate_state(context, STATE_SAMPLER(i));
2631                 context_invalidate_texture_stage(context, i);
2632             }
2633         }
2634         return;
2635     }
2636
2637     /* Now work out the mapping */
2638     tex = 0;
2639     for (i = 0; ffu_map; ffu_map >>= 1, ++i)
2640     {
2641         if (!(ffu_map & 1))
2642             continue;
2643
2644         if (context->tex_unit_map[i] != tex)
2645         {
2646             context_map_stage(context, i, tex);
2647             context_invalidate_state(context, STATE_SAMPLER(i));
2648             context_invalidate_texture_stage(context, i);
2649         }
2650
2651         ++tex;
2652     }
2653 }
2654
2655 static void context_map_psamplers(struct wined3d_context *context, const struct wined3d_state *state)
2656 {
2657     const struct wined3d_shader_resource_info *resource_info =
2658             state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.resource_info;
2659     unsigned int i;
2660     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2661
2662     for (i = 0; i < MAX_FRAGMENT_SAMPLERS; ++i)
2663     {
2664         if (resource_info[i].type && context->tex_unit_map[i] != i)
2665         {
2666             context_map_stage(context, i, i);
2667             context_invalidate_state(context, STATE_SAMPLER(i));
2668             if (i < d3d_info->limits.ffp_blend_stages)
2669                 context_invalidate_texture_stage(context, i);
2670         }
2671     }
2672 }
2673
2674 static BOOL context_unit_free_for_vs(const struct wined3d_context *context,
2675         const struct wined3d_shader_resource_info *ps_resource_info,
2676         const struct wined3d_shader_resource_info *vs_resource_info, DWORD unit)
2677 {
2678     DWORD current_mapping = context->rev_tex_unit_map[unit];
2679
2680     /* Not currently used */
2681     if (current_mapping == WINED3D_UNMAPPED_STAGE)
2682         return TRUE;
2683
2684     if (current_mapping < MAX_FRAGMENT_SAMPLERS)
2685     {
2686         /* Used by a fragment sampler */
2687
2688         if (!ps_resource_info)
2689         {
2690             /* No pixel shader, check fixed function */
2691             return current_mapping >= MAX_TEXTURES || !(context->fixed_function_usage_map & (1 << current_mapping));
2692         }
2693
2694         /* Pixel shader, check the shader's sampler map */
2695         return !ps_resource_info[current_mapping].type;
2696     }
2697
2698     /* Used by a vertex sampler */
2699     return !vs_resource_info[current_mapping - MAX_FRAGMENT_SAMPLERS].type;
2700 }
2701
2702 static void context_map_vsamplers(struct wined3d_context *context, BOOL ps, const struct wined3d_state *state)
2703 {
2704     const struct wined3d_shader_resource_info *vs_resource_info =
2705             state->shader[WINED3D_SHADER_TYPE_VERTEX]->reg_maps.resource_info;
2706     const struct wined3d_shader_resource_info *ps_resource_info = NULL;
2707     const struct wined3d_gl_info *gl_info = context->gl_info;
2708     int start = min(MAX_COMBINED_SAMPLERS, gl_info->limits.combined_samplers) - 1;
2709     int i;
2710
2711     /* Note that we only care if a resource is used or not, not the
2712      * resource's specific type. Otherwise we'd need to call
2713      * shader_update_samplers() here for 1.x pixelshaders. */
2714     if (ps)
2715         ps_resource_info = state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.resource_info;
2716
2717     for (i = 0; i < MAX_VERTEX_SAMPLERS; ++i)
2718     {
2719         DWORD vsampler_idx = i + MAX_FRAGMENT_SAMPLERS;
2720         if (vs_resource_info[i].type)
2721         {
2722             if (context->tex_unit_map[vsampler_idx] != WINED3D_UNMAPPED_STAGE)
2723             {
2724                 /* Already mapped somewhere */
2725                 continue;
2726             }
2727
2728             while (start >= 0)
2729             {
2730                 if (context_unit_free_for_vs(context, ps_resource_info, vs_resource_info, start))
2731                 {
2732                     context_map_stage(context, vsampler_idx, start);
2733                     context_invalidate_state(context, STATE_SAMPLER(vsampler_idx));
2734
2735                     --start;
2736                     break;
2737                 }
2738
2739                 --start;
2740             }
2741         }
2742     }
2743 }
2744
2745 static void context_update_tex_unit_map(struct wined3d_context *context, const struct wined3d_state *state)
2746 {
2747     BOOL vs = use_vs(state);
2748     BOOL ps = use_ps(state);
2749     /*
2750      * Rules are:
2751      * -> Pixel shaders need a 1:1 map. In theory the shader input could be mapped too, but
2752      * that would be really messy and require shader recompilation
2753      * -> When the mapping of a stage is changed, sampler and ALL texture stage states have
2754      * to be reset. Because of that try to work with a 1:1 mapping as much as possible
2755      */
2756     if (ps)
2757         context_map_psamplers(context, state);
2758     else
2759         context_map_fixed_function_samplers(context, state);
2760
2761     if (vs)
2762         context_map_vsamplers(context, ps, state);
2763 }
2764
2765 /* Context activation is done by the caller. */
2766 void context_state_drawbuf(struct wined3d_context *context, const struct wined3d_state *state, DWORD state_id)
2767 {
2768     const struct wined3d_device *device = context->swapchain->device;
2769     DWORD rt_mask, *cur_mask;
2770
2771     if (isStateDirty(context, STATE_FRAMEBUFFER)) return;
2772
2773     cur_mask = context->current_fbo ? &context->current_fbo->rt_mask : &context->draw_buffers_mask;
2774     rt_mask = find_draw_buffers_mask(context, device);
2775     if (rt_mask != *cur_mask)
2776     {
2777         context_apply_draw_buffers(context, rt_mask);
2778         *cur_mask = rt_mask;
2779     }
2780 }
2781
2782 static BOOL fixed_get_input(BYTE usage, BYTE usage_idx, unsigned int *regnum)
2783 {
2784     if ((usage == WINED3D_DECL_USAGE_POSITION || usage == WINED3D_DECL_USAGE_POSITIONT) && !usage_idx)
2785         *regnum = WINED3D_FFP_POSITION;
2786     else if (usage == WINED3D_DECL_USAGE_BLEND_WEIGHT && !usage_idx)
2787         *regnum = WINED3D_FFP_BLENDWEIGHT;
2788     else if (usage == WINED3D_DECL_USAGE_BLEND_INDICES && !usage_idx)
2789         *regnum = WINED3D_FFP_BLENDINDICES;
2790     else if (usage == WINED3D_DECL_USAGE_NORMAL && !usage_idx)
2791         *regnum = WINED3D_FFP_NORMAL;
2792     else if (usage == WINED3D_DECL_USAGE_PSIZE && !usage_idx)
2793         *regnum = WINED3D_FFP_PSIZE;
2794     else if (usage == WINED3D_DECL_USAGE_COLOR && !usage_idx)
2795         *regnum = WINED3D_FFP_DIFFUSE;
2796     else if (usage == WINED3D_DECL_USAGE_COLOR && usage_idx == 1)
2797         *regnum = WINED3D_FFP_SPECULAR;
2798     else if (usage == WINED3D_DECL_USAGE_TEXCOORD && usage_idx < WINED3DDP_MAXTEXCOORD)
2799         *regnum = WINED3D_FFP_TEXCOORD0 + usage_idx;
2800     else
2801     {
2802         FIXME("Unsupported input stream [usage=%s, usage_idx=%u].\n", debug_d3ddeclusage(usage), usage_idx);
2803         *regnum = ~0U;
2804         return FALSE;
2805     }
2806
2807     return TRUE;
2808 }
2809
2810 /* Context activation is done by the caller. */
2811 void context_stream_info_from_declaration(struct wined3d_context *context,
2812         const struct wined3d_state *state, struct wined3d_stream_info *stream_info)
2813 {
2814     /* We need to deal with frequency data! */
2815     struct wined3d_vertex_declaration *declaration = state->vertex_declaration;
2816     BOOL use_vshader = use_vs(state);
2817     BOOL generic_attributes = context->d3d_info->ffp_generic_attributes;
2818     unsigned int i;
2819
2820     stream_info->use_map = 0;
2821     stream_info->swizzle_map = 0;
2822     stream_info->position_transformed = declaration->position_transformed;
2823
2824     /* Translate the declaration into strided data. */
2825     for (i = 0; i < declaration->element_count; ++i)
2826     {
2827         const struct wined3d_vertex_declaration_element *element = &declaration->elements[i];
2828         const struct wined3d_stream_state *stream = &state->streams[element->input_slot];
2829         BOOL stride_used;
2830         unsigned int idx;
2831
2832         TRACE("%p Element %p (%u of %u).\n", declaration->elements,
2833                 element, i + 1, declaration->element_count);
2834
2835         if (!stream->buffer)
2836             continue;
2837
2838         TRACE("offset %u input_slot %u usage_idx %d.\n", element->offset, element->input_slot, element->usage_idx);
2839
2840         if (use_vshader)
2841         {
2842             if (element->output_slot == WINED3D_OUTPUT_SLOT_UNUSED)
2843             {
2844                 stride_used = FALSE;
2845             }
2846             else if (element->output_slot == WINED3D_OUTPUT_SLOT_SEMANTIC)
2847             {
2848                 /* TODO: Assuming vertexdeclarations are usually used with the
2849                  * same or a similar shader, it might be worth it to store the
2850                  * last used output slot and try that one first. */
2851                 stride_used = vshader_get_input(state->shader[WINED3D_SHADER_TYPE_VERTEX],
2852                         element->usage, element->usage_idx, &idx);
2853             }
2854             else
2855             {
2856                 idx = element->output_slot;
2857                 stride_used = TRUE;
2858             }
2859         }
2860         else
2861         {
2862             if (!generic_attributes && !element->ffp_valid)
2863             {
2864                 WARN("Skipping unsupported fixed function element of format %s and usage %s.\n",
2865                         debug_d3dformat(element->format->id), debug_d3ddeclusage(element->usage));
2866                 stride_used = FALSE;
2867             }
2868             else
2869             {
2870                 stride_used = fixed_get_input(element->usage, element->usage_idx, &idx);
2871             }
2872         }
2873
2874         if (stride_used)
2875         {
2876             TRACE("Load %s array %u [usage %s, usage_idx %u, "
2877                     "input_slot %u, offset %u, stride %u, format %s, class %s, step_rate %u].\n",
2878                     use_vshader ? "shader": "fixed function", idx,
2879                     debug_d3ddeclusage(element->usage), element->usage_idx, element->input_slot,
2880                     element->offset, stream->stride, debug_d3dformat(element->format->id),
2881                     debug_d3dinput_classification(element->input_slot_class), element->instance_data_step_rate);
2882
2883             stream_info->elements[idx].format = element->format;
2884             stream_info->elements[idx].data.buffer_object = 0;
2885             stream_info->elements[idx].data.addr = (BYTE *)NULL + stream->offset + element->offset;
2886             stream_info->elements[idx].stride = stream->stride;
2887             stream_info->elements[idx].stream_idx = element->input_slot;
2888             if (stream->flags & WINED3DSTREAMSOURCE_INSTANCEDATA)
2889             {
2890                 stream_info->elements[idx].divisor = 1;
2891             }
2892             else if (element->input_slot_class == WINED3D_INPUT_PER_INSTANCE_DATA)
2893             {
2894                 stream_info->elements[idx].divisor = element->instance_data_step_rate;
2895                 if (!element->instance_data_step_rate)
2896                     FIXME("Instance step rate 0 not implemented.\n");
2897             }
2898             else
2899             {
2900                 stream_info->elements[idx].divisor = 0;
2901             }
2902
2903             if (!context->gl_info->supported[ARB_VERTEX_ARRAY_BGRA]
2904                     && element->format->id == WINED3DFMT_B8G8R8A8_UNORM)
2905             {
2906                 stream_info->swizzle_map |= 1 << idx;
2907             }
2908             stream_info->use_map |= 1 << idx;
2909         }
2910     }
2911 }
2912
2913 /* Context activation is done by the caller. */
2914 static void context_update_stream_info(struct wined3d_context *context, const struct wined3d_state *state)
2915 {
2916     const struct wined3d_gl_info *gl_info = context->gl_info;
2917     const struct wined3d_d3d_info *d3d_info = context->d3d_info;
2918     struct wined3d_stream_info *stream_info = &context->stream_info;
2919     DWORD prev_all_vbo = stream_info->all_vbo;
2920     unsigned int i;
2921     WORD map;
2922
2923     context_stream_info_from_declaration(context, state, stream_info);
2924
2925     stream_info->all_vbo = 1;
2926     context->num_buffer_queries = 0;
2927     for (i = 0, map = stream_info->use_map; map; map >>= 1, ++i)
2928     {
2929         struct wined3d_stream_info_element *element;
2930         struct wined3d_bo_address data;
2931         struct wined3d_buffer *buffer;
2932
2933         if (!(map & 1))
2934             continue;
2935
2936         element = &stream_info->elements[i];
2937         buffer = state->streams[element->stream_idx].buffer;
2938
2939         /* We can't use VBOs if the base vertex index is negative. OpenGL
2940          * doesn't accept negative offsets (or rather offsets bigger than the
2941          * VBO, because the pointer is unsigned), so use system memory
2942          * sources. In most sane cases the pointer - offset will still be > 0,
2943          * otherwise it will wrap around to some big value. Hope that with the
2944          * indices the driver wraps it back internally. If not,
2945          * drawStridedSlow is needed, including a vertex buffer path. */
2946         if (state->load_base_vertex_index < 0)
2947         {
2948             WARN_(d3d_perf)("load_base_vertex_index is < 0 (%d), not using VBOs.\n",
2949                     state->load_base_vertex_index);
2950             element->data.buffer_object = 0;
2951             element->data.addr += (ULONG_PTR)buffer_get_sysmem(buffer, context);
2952             if ((UINT_PTR)element->data.addr < -state->load_base_vertex_index * element->stride)
2953                 FIXME("System memory vertex data load offset is negative!\n");
2954         }
2955         else
2956         {
2957             buffer_internal_preload(buffer, context, state);
2958             buffer_get_memory(buffer, context, &data);
2959             element->data.buffer_object = data.buffer_object;
2960             element->data.addr += (ULONG_PTR)data.addr;
2961         }
2962
2963         if (!element->data.buffer_object)
2964             stream_info->all_vbo = 0;
2965
2966         if (buffer->query)
2967             context->buffer_queries[context->num_buffer_queries++] = buffer->query;
2968
2969         TRACE("Load array %u {%#x:%p}.\n", i, element->data.buffer_object, element->data.addr);
2970     }
2971
2972     if (use_vs(state))
2973     {
2974         if (state->vertex_declaration->half_float_conv_needed && !stream_info->all_vbo)
2975         {
2976             TRACE("Using drawStridedSlow with vertex shaders for FLOAT16 conversion.\n");
2977             context->use_immediate_mode_draw = TRUE;
2978         }
2979         else
2980         {
2981             context->use_immediate_mode_draw = FALSE;
2982         }
2983     }
2984     else
2985     {
2986         WORD slow_mask = -!d3d_info->ffp_generic_attributes & (1 << WINED3D_FFP_PSIZE);
2987         slow_mask |= -!gl_info->supported[ARB_VERTEX_ARRAY_BGRA]
2988                 & ((1 << WINED3D_FFP_DIFFUSE) | (1 << WINED3D_FFP_SPECULAR));
2989
2990         if (((stream_info->position_transformed && !d3d_info->xyzrhw)
2991                 || (stream_info->use_map & slow_mask)) && !stream_info->all_vbo)
2992             context->use_immediate_mode_draw = TRUE;
2993         else
2994             context->use_immediate_mode_draw = FALSE;
2995     }
2996
2997     if (prev_all_vbo != stream_info->all_vbo)
2998         context_invalidate_state(context, STATE_INDEXBUFFER);
2999 }
3000
3001 /* Context activation is done by the caller. */
3002 static void context_preload_texture(struct wined3d_context *context,
3003         const struct wined3d_state *state, unsigned int idx)
3004 {
3005     struct wined3d_texture *texture;
3006
3007     if (!(texture = state->textures[idx]))
3008         return;
3009
3010     wined3d_texture_load(texture, context, state->sampler_states[idx][WINED3D_SAMP_SRGB_TEXTURE]);
3011 }
3012
3013 /* Context activation is done by the caller. */
3014 static void context_preload_textures(struct wined3d_context *context, const struct wined3d_state *state)
3015 {
3016     unsigned int i;
3017
3018     if (use_vs(state))
3019     {
3020         for (i = 0; i < MAX_VERTEX_SAMPLERS; ++i)
3021         {
3022             if (state->shader[WINED3D_SHADER_TYPE_VERTEX]->reg_maps.resource_info[i].type)
3023                 context_preload_texture(context, state, MAX_FRAGMENT_SAMPLERS + i);
3024         }
3025     }
3026
3027     if (use_ps(state))
3028     {
3029         for (i = 0; i < MAX_FRAGMENT_SAMPLERS; ++i)
3030         {
3031             if (state->shader[WINED3D_SHADER_TYPE_PIXEL]->reg_maps.resource_info[i].type)
3032                 context_preload_texture(context, state, i);
3033         }
3034     }
3035     else
3036     {
3037         WORD ffu_map = context->fixed_function_usage_map;
3038
3039         for (i = 0; ffu_map; ffu_map >>= 1, ++i)
3040         {
3041             if (ffu_map & 1)
3042                 context_preload_texture(context, state, i);
3043         }
3044     }
3045 }
3046
3047 static void context_bind_shader_resources(struct wined3d_context *context, const struct wined3d_state *state)
3048 {
3049     const struct wined3d_gl_info *gl_info = context->gl_info;
3050     struct wined3d_shader_sampler_map_entry *entry;
3051     struct wined3d_shader_resource_view *view;
3052     struct wined3d_sampler *sampler;
3053     struct wined3d_texture *texture;
3054     struct wined3d_shader *shader;
3055     unsigned int i, j, count;
3056
3057     static const struct
3058     {
3059         enum wined3d_shader_type type;
3060         unsigned int base_idx;
3061         unsigned int count;
3062     }
3063     shader_types[] =
3064     {
3065         {WINED3D_SHADER_TYPE_PIXEL,     0,                      MAX_FRAGMENT_SAMPLERS},
3066         {WINED3D_SHADER_TYPE_VERTEX,    MAX_FRAGMENT_SAMPLERS,  MAX_VERTEX_SAMPLERS},
3067     };
3068
3069     for (i = 0; i < ARRAY_SIZE(shader_types); ++i)
3070     {
3071         if (!(shader = state->shader[shader_types[i].type]))
3072             continue;
3073
3074         count = shader->reg_maps.sampler_map.count;
3075         if (count > shader_types[i].count)
3076         {
3077             FIXME("Shader %p needs %u samplers, but only %u are supported.\n",
3078                     shader, count, shader_types[i].count);
3079             count = shader_types[i].count;
3080         }
3081
3082         for (j = 0; j < count; ++j)
3083         {
3084             entry = &shader->reg_maps.sampler_map.entries[j];
3085
3086             if (!(view = state->shader_resource_view[shader_types[i].type][entry->resource_idx]))
3087             {
3088                 WARN("No resource view bound at index %u, %u.\n", shader_types[i].type, entry->resource_idx);
3089                 continue;
3090             }
3091
3092             if (view->resource->type == WINED3D_RTYPE_BUFFER)
3093             {
3094                 FIXME("Buffer shader resources not supported.\n");
3095                 continue;
3096             }
3097
3098             if (!(sampler = state->sampler[shader_types[i].type][entry->sampler_idx]))
3099             {
3100                 WARN("No sampler object bound at index %u, %u.\n", shader_types[i].type, entry->sampler_idx);
3101                 continue;
3102             }
3103
3104             texture = wined3d_texture_from_resource(view->resource);
3105             wined3d_texture_load(texture, context, FALSE);
3106             context_active_texture(context, gl_info, shader_types[i].base_idx + entry->bind_idx);
3107             wined3d_texture_bind(texture, context, FALSE);
3108
3109             GL_EXTCALL(glBindSampler(shader_types[i].base_idx + entry->bind_idx, sampler->name));
3110             checkGLcall("glBindSampler");
3111         }
3112     }
3113 }
3114
3115 /* Context activation is done by the caller. */
3116 BOOL context_apply_draw_state(struct wined3d_context *context, struct wined3d_device *device)
3117 {
3118     const struct wined3d_state *state = &device->state;
3119     const struct StateEntry *state_table = context->state_table;
3120     const struct wined3d_fb_state *fb = state->fb;
3121     unsigned int i, j;
3122     WORD map;
3123
3124     if (!context_validate_rt_config(context->gl_info->limits.buffers,
3125             fb->render_targets, fb->depth_stencil))
3126         return FALSE;
3127
3128     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO && isStateDirty(context, STATE_FRAMEBUFFER))
3129     {
3130         context_validate_onscreen_formats(context, fb->depth_stencil);
3131     }
3132
3133     /* Preload resources before FBO setup. Texture preload in particular may
3134      * result in changes to the current FBO, due to using e.g. FBO blits for
3135      * updating a resource location. */
3136     context_update_tex_unit_map(context, state);
3137     context_preload_textures(context, state);
3138     /* TODO: Right now the dependency on the vertex shader is necessary
3139      * since context_stream_info_from_declaration depends on the reg_maps of
3140      * the current VS but maybe it's possible to relax the coupling in some
3141      * situations at least. */
3142     if (isStateDirty(context, STATE_VDECL) || isStateDirty(context, STATE_STREAMSRC)
3143             || isStateDirty(context, STATE_SHADER(WINED3D_SHADER_TYPE_VERTEX)))
3144     {
3145         context_update_stream_info(context, state);
3146     }
3147     else
3148     {
3149         for (i = 0, map = context->stream_info.use_map; map; map >>= 1, ++i)
3150         {
3151             if (map & 1)
3152                 buffer_mark_used(state->streams[context->stream_info.elements[i].stream_idx].buffer);
3153         }
3154     }
3155     if (state->index_buffer)
3156     {
3157         if (context->stream_info.all_vbo)
3158             buffer_internal_preload(state->index_buffer, context, state);
3159         else
3160             buffer_get_sysmem(state->index_buffer, context);
3161     }
3162
3163     for (i = 0; i < WINED3D_SHADER_TYPE_COUNT; ++i)
3164     {
3165         for (j = 0; j < WINED3D_MAX_CBS; ++j)
3166         {
3167             if (state->cb[i][j])
3168                 buffer_internal_preload(state->cb[i][j], context, state);
3169         }
3170     }
3171
3172     for (i = 0; i < context->numDirtyEntries; ++i)
3173     {
3174         DWORD rep = context->dirtyArray[i];
3175         DWORD idx = rep / (sizeof(*context->isStateDirty) * CHAR_BIT);
3176         BYTE shift = rep & ((sizeof(*context->isStateDirty) * CHAR_BIT) - 1);
3177         context->isStateDirty[idx] &= ~(1 << shift);
3178         state_table[rep].apply(context, state, rep);
3179     }
3180
3181     if (context->shader_update_mask)
3182     {
3183         device->shader_backend->shader_select(device->shader_priv, context, state);
3184         context->shader_update_mask = 0;
3185     }
3186
3187     if (context->constant_update_mask)
3188     {
3189         device->shader_backend->shader_load_constants(device->shader_priv, context, state);
3190         context->constant_update_mask = 0;
3191     }
3192
3193     if (context->update_shader_resource_bindings)
3194     {
3195         context_bind_shader_resources(context, state);
3196         context->update_shader_resource_bindings = 0;
3197     }
3198
3199     if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
3200     {
3201         context_check_fbo_status(context, GL_FRAMEBUFFER);
3202     }
3203
3204     context->numDirtyEntries = 0; /* This makes the whole list clean */
3205     context->last_was_blit = FALSE;
3206
3207     return TRUE;
3208 }
3209
3210 static void context_setup_target(struct wined3d_context *context, struct wined3d_surface *target)
3211 {
3212     BOOL old_render_offscreen = context->render_offscreen, render_offscreen;
3213
3214     render_offscreen = wined3d_resource_is_offscreen(&target->container->resource);
3215     if (context->current_rt == target && render_offscreen == old_render_offscreen) return;
3216
3217     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
3218      * the alpha blend state changes with different render target formats. */
3219     if (!context->current_rt)
3220     {
3221         context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
3222     }
3223     else
3224     {
3225         const struct wined3d_format *old = context->current_rt->resource.format;
3226         const struct wined3d_format *new = target->resource.format;
3227
3228         if (old->id != new->id)
3229         {
3230             /* Disable blending when the alpha mask has changed and when a format doesn't support blending. */
3231             if ((old->alpha_size && !new->alpha_size) || (!old->alpha_size && new->alpha_size)
3232                     || !(target->container->resource.format_flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
3233                 context_invalidate_state(context, STATE_RENDER(WINED3D_RS_ALPHABLENDENABLE));
3234
3235             /* Update sRGB writing when switching between formats that do/do not support sRGB writing */
3236             if ((context->current_rt->container->resource.format_flags & WINED3DFMT_FLAG_SRGB_WRITE)
3237                     != (target->container->resource.format_flags & WINED3DFMT_FLAG_SRGB_WRITE))
3238                 context_invalidate_state(context, STATE_RENDER(WINED3D_RS_SRGBWRITEENABLE));
3239         }
3240
3241         /* When switching away from an offscreen render target, and we're not
3242          * using FBOs, we have to read the drawable into the texture. This is
3243          * done via PreLoad (and WINED3D_LOCATION_DRAWABLE set on the surface).
3244          * There are some things that need care though. PreLoad needs a GL context,
3245          * and FindContext is called before the context is activated. It also
3246          * has to be called with the old rendertarget active, otherwise a
3247          * wrong drawable is read. */
3248         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO
3249                 && old_render_offscreen && context->current_rt != target)
3250         {
3251             struct wined3d_texture *texture = context->current_rt->container;
3252
3253             /* Read the back buffer of the old drawable into the destination texture. */
3254             if (texture->texture_srgb.name)
3255                 wined3d_texture_load(texture, context, TRUE);
3256             wined3d_texture_load(texture, context, FALSE);
3257             surface_invalidate_location(context->current_rt, WINED3D_LOCATION_DRAWABLE);
3258         }
3259     }
3260
3261     context->current_rt = target;
3262     context_set_render_offscreen(context, render_offscreen);
3263 }
3264
3265 struct wined3d_context *context_acquire(const struct wined3d_device *device, struct wined3d_surface *target)
3266 {
3267     struct wined3d_context *current_context = context_get_current();
3268     struct wined3d_context *context;
3269
3270     TRACE("device %p, target %p.\n", device, target);
3271
3272     if (current_context && current_context->destroyed)
3273         current_context = NULL;
3274
3275     if (!target)
3276     {
3277         if (current_context
3278                 && current_context->current_rt
3279                 && current_context->swapchain->device == device)
3280         {
3281             target = current_context->current_rt;
3282         }
3283         else
3284         {
3285             struct wined3d_swapchain *swapchain = device->swapchains[0];
3286             if (swapchain->back_buffers)
3287                 target = surface_from_resource(wined3d_texture_get_sub_resource(swapchain->back_buffers[0], 0));
3288             else
3289                 target = surface_from_resource(wined3d_texture_get_sub_resource(swapchain->front_buffer, 0));
3290         }
3291     }
3292
3293     if (current_context && current_context->current_rt == target)
3294     {
3295         context = current_context;
3296     }
3297     else if (target->container->swapchain)
3298     {
3299         TRACE("Rendering onscreen.\n");
3300
3301         context = swapchain_get_context(target->container->swapchain);
3302     }
3303     else
3304     {
3305         TRACE("Rendering offscreen.\n");
3306
3307         /* Stay with the current context if possible. Otherwise use the
3308          * context for the primary swapchain. */
3309         if (current_context && current_context->swapchain->device == device)
3310             context = current_context;
3311         else
3312             context = swapchain_get_context(device->swapchains[0]);
3313     }
3314
3315     context_enter(context);
3316     context_update_window(context);
3317     context_setup_target(context, target);
3318     if (!context->valid) return context;
3319
3320     if (context != current_context)
3321     {
3322         if (!context_set_current(context))
3323             ERR("Failed to activate the new context.\n");
3324     }
3325     else if (context->needs_set)
3326     {
3327         context_set_gl_context(context);
3328     }
3329
3330     return context;
3331 }