git.oblomov.eu Git - wine/blob - dlls/wined3d/context.c

   1 /*
   2  * Context and render target management in wined3d
   3  *
   4  * Copyright 2007-2008 Stefan Dösinger for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include <stdio.h>
  23 #ifdef HAVE_FLOAT_H
  24 # include <float.h>
  25 #endif
  26 #include "wined3d_private.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(d3d);
  29
  30 #define GLINFO_LOCATION This->adapter->gl_info
  31
  32 /* The last used device.
  33  *
  34  * If the application creates multiple devices and switches between them, ActivateContext has to
  35  * change the opengl context. This flag allows to keep track which device is active
  36  */
  37 static IWineD3DDeviceImpl *last_device;
  38
  39 /* FBO helper functions */
  40
  41 /* GL locking is done by the caller */
  42 void context_bind_fbo(IWineD3DDevice *iface, GLenum target, GLuint *fbo)
  43 {
  44     const IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
  45
  46     if (!*fbo)
  47     {
  48         GL_EXTCALL(glGenFramebuffersEXT(1, fbo));
  49         checkGLcall("glGenFramebuffersEXT()");
  50         TRACE("Created FBO %d\n", *fbo);
  51     }
  52
  53     GL_EXTCALL(glBindFramebufferEXT(target, *fbo));
  54     checkGLcall("glBindFramebuffer()");
  55 }
  56
  57 /* GL locking is done by the caller */
  58 static void context_clean_fbo_attachments(IWineD3DDeviceImpl *This)
  59 {
  60     unsigned int i;
  61
  62     for (i = 0; i < GL_LIMITS(buffers); ++i)
  63     {
  64         GL_EXTCALL(glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT + i, GL_TEXTURE_2D, 0, 0));
  65         checkGLcall("glFramebufferTexture2D()");
  66     }
  67     GL_EXTCALL(glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
  68     checkGLcall("glFramebufferTexture2D()");
  69
  70     GL_EXTCALL(glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
  71     checkGLcall("glFramebufferTexture2D()");
  72 }
  73
  74 /* GL locking is done by the caller */
  75 static void context_destroy_fbo(IWineD3DDeviceImpl *This, const GLuint *fbo)
  76 {
  77     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, *fbo));
  78     checkGLcall("glBindFramebuffer()");
  79
  80     context_clean_fbo_attachments(This);
  81
  82     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
  83     checkGLcall("glBindFramebuffer()");
  84     GL_EXTCALL(glDeleteFramebuffersEXT(1, fbo));
  85     checkGLcall("glDeleteFramebuffers()");
  86 }
  87
  88 /* GL locking is done by the caller */
  89 static void context_apply_attachment_filter_states(IWineD3DDevice *iface, IWineD3DSurface *surface, BOOL force_preload)
  90 {
  91     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
  92     const IWineD3DSurfaceImpl *surface_impl = (IWineD3DSurfaceImpl *)surface;
  93     IWineD3DBaseTextureImpl *texture_impl;
  94     BOOL update_minfilter = FALSE;
  95     BOOL update_magfilter = FALSE;
  96
  97     /* Update base texture states array */
  98     if (SUCCEEDED(IWineD3DSurface_GetContainer(surface, &IID_IWineD3DBaseTexture, (void **)&texture_impl)))
  99     {
 100         if (texture_impl->baseTexture.states[WINED3DTEXSTA_MINFILTER] != WINED3DTEXF_POINT
 101             || texture_impl->baseTexture.states[WINED3DTEXSTA_MIPFILTER] != WINED3DTEXF_NONE)
 102         {
 103             texture_impl->baseTexture.states[WINED3DTEXSTA_MINFILTER] = WINED3DTEXF_POINT;
 104             texture_impl->baseTexture.states[WINED3DTEXSTA_MIPFILTER] = WINED3DTEXF_NONE;
 105             update_minfilter = TRUE;
 106         }
 107
 108         if (texture_impl->baseTexture.states[WINED3DTEXSTA_MAGFILTER] != WINED3DTEXF_POINT)
 109         {
 110             texture_impl->baseTexture.states[WINED3DTEXSTA_MAGFILTER] = WINED3DTEXF_POINT;
 111             update_magfilter = TRUE;
 112         }
 113
 114         if (texture_impl->baseTexture.bindCount)
 115         {
 116             WARN("Render targets should not be bound to a sampler\n");
 117             IWineD3DDeviceImpl_MarkStateDirty(This, STATE_SAMPLER(texture_impl->baseTexture.sampler));
 118         }
 119
 120         IWineD3DBaseTexture_Release((IWineD3DBaseTexture *)texture_impl);
 121     }
 122
 123     if (update_minfilter || update_magfilter || force_preload)
 124     {
 125         GLenum target, bind_target;
 126         GLint old_binding;
 127
 128         target = surface_impl->glDescription.target;
 129         if (target == GL_TEXTURE_2D)
 130         {
 131             bind_target = GL_TEXTURE_2D;
 132             glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_binding);
 133         } else if (target == GL_TEXTURE_RECTANGLE_ARB) {
 134             bind_target = GL_TEXTURE_RECTANGLE_ARB;
 135             glGetIntegerv(GL_TEXTURE_BINDING_RECTANGLE_ARB, &old_binding);
 136         } else {
 137             bind_target = GL_TEXTURE_CUBE_MAP_ARB;
 138             glGetIntegerv(GL_TEXTURE_BINDING_CUBE_MAP_ARB, &old_binding);
 139         }
 140
 141         surface_internal_preload(surface, SRGB_RGB);
 142
 143         glBindTexture(bind_target, surface_impl->glDescription.textureName);
 144         if (update_minfilter) glTexParameteri(bind_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 145         if (update_magfilter) glTexParameteri(bind_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 146         glBindTexture(bind_target, old_binding);
 147     }
 148
 149     checkGLcall("apply_attachment_filter_states()");
 150 }
 151
 152 /* GL locking is done by the caller */
 153 void context_attach_depth_stencil_fbo(IWineD3DDeviceImpl *This, GLenum fbo_target, IWineD3DSurface *depth_stencil, BOOL use_render_buffer)
 154 {
 155     IWineD3DSurfaceImpl *depth_stencil_impl = (IWineD3DSurfaceImpl *)depth_stencil;
 156
 157     TRACE("Attach depth stencil %p\n", depth_stencil);
 158
 159     if (depth_stencil)
 160     {
 161         DWORD format_flags = depth_stencil_impl->resource.format_desc->Flags;
 162
 163         if (use_render_buffer && depth_stencil_impl->current_renderbuffer)
 164         {
 165             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 166             {
 167                 GL_EXTCALL(glFramebufferRenderbufferEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT,
 168                         GL_RENDERBUFFER_EXT, depth_stencil_impl->current_renderbuffer->id));
 169                 checkGLcall("glFramebufferRenderbufferEXT()");
 170             }
 171
 172             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 173             {
 174                 GL_EXTCALL(glFramebufferRenderbufferEXT(fbo_target, GL_STENCIL_ATTACHMENT_EXT,
 175                         GL_RENDERBUFFER_EXT, depth_stencil_impl->current_renderbuffer->id));
 176                 checkGLcall("glFramebufferRenderbufferEXT()");
 177             }
 178         }
 179         else
 180         {
 181             context_apply_attachment_filter_states((IWineD3DDevice *)This, depth_stencil, TRUE);
 182
 183             if (format_flags & WINED3DFMT_FLAG_DEPTH)
 184             {
 185                 GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT,
 186                         depth_stencil_impl->glDescription.target, depth_stencil_impl->glDescription.textureName,
 187                         depth_stencil_impl->glDescription.level));
 188                 checkGLcall("glFramebufferTexture2DEXT()");
 189             }
 190
 191             if (format_flags & WINED3DFMT_FLAG_STENCIL)
 192             {
 193                 GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_STENCIL_ATTACHMENT_EXT,
 194                         depth_stencil_impl->glDescription.target, depth_stencil_impl->glDescription.textureName,
 195                         depth_stencil_impl->glDescription.level));
 196                 checkGLcall("glFramebufferTexture2DEXT()");
 197             }
 198         }
 199
 200         if (!(format_flags & WINED3DFMT_FLAG_DEPTH))
 201         {
 202             GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
 203             checkGLcall("glFramebufferTexture2DEXT()");
 204         }
 205
 206         if (!(format_flags & WINED3DFMT_FLAG_STENCIL))
 207         {
 208             GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_STENCIL_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
 209             checkGLcall("glFramebufferTexture2DEXT()");
 210         }
 211     }
 212     else
 213     {
 214         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
 215         checkGLcall("glFramebufferTexture2DEXT()");
 216
 217         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_STENCIL_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
 218         checkGLcall("glFramebufferTexture2DEXT()");
 219     }
 220 }
 221
 222 /* GL locking is done by the caller */
 223 void context_attach_surface_fbo(IWineD3DDeviceImpl *This, GLenum fbo_target, DWORD idx, IWineD3DSurface *surface)
 224 {
 225     const IWineD3DSurfaceImpl *surface_impl = (IWineD3DSurfaceImpl *)surface;
 226
 227     TRACE("Attach surface %p to %u\n", surface, idx);
 228
 229     if (surface)
 230     {
 231         context_apply_attachment_filter_states((IWineD3DDevice *)This, surface, TRUE);
 232
 233         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_COLOR_ATTACHMENT0_EXT + idx, surface_impl->glDescription.target,
 234                 surface_impl->glDescription.textureName, surface_impl->glDescription.level));
 235         checkGLcall("glFramebufferTexture2DEXT()");
 236     } else {
 237         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_COLOR_ATTACHMENT0_EXT + idx, GL_TEXTURE_2D, 0, 0));
 238         checkGLcall("glFramebufferTexture2DEXT()");
 239     }
 240 }
 241
 242 /* GL locking is done by the caller */
 243 static void context_check_fbo_status(IWineD3DDevice *iface)
 244 {
 245     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 246     GLenum status;
 247
 248     status = GL_EXTCALL(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
 249     if (status == GL_FRAMEBUFFER_COMPLETE_EXT)
 250     {
 251         TRACE("FBO complete\n");
 252     } else {
 253         IWineD3DSurfaceImpl *attachment;
 254         unsigned int i;
 255         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 256
 257         /* Dump the FBO attachments */
 258         for (i = 0; i < GL_LIMITS(buffers); ++i)
 259         {
 260             attachment = (IWineD3DSurfaceImpl *)This->activeContext->current_fbo->render_targets[i];
 261             if (attachment)
 262             {
 263                 FIXME("\tColor attachment %d: (%p) %s %ux%u\n",
 264                         i, attachment, debug_d3dformat(attachment->resource.format_desc->format),
 265                         attachment->pow2Width, attachment->pow2Height);
 266             }
 267         }
 268         attachment = (IWineD3DSurfaceImpl *)This->activeContext->current_fbo->depth_stencil;
 269         if (attachment)
 270         {
 271             FIXME("\tDepth attachment: (%p) %s %ux%u\n",
 272                     attachment, debug_d3dformat(attachment->resource.format_desc->format),
 273                     attachment->pow2Width, attachment->pow2Height);
 274         }
 275     }
 276 }
 277
 278 static struct fbo_entry *context_create_fbo_entry(IWineD3DDevice *iface)
 279 {
 280     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 281     struct fbo_entry *entry;
 282
 283     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 284     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, GL_LIMITS(buffers) * sizeof(*entry->render_targets));
 285     memcpy(entry->render_targets, This->render_targets, GL_LIMITS(buffers) * sizeof(*entry->render_targets));
 286     entry->depth_stencil = This->stencilBufferTarget;
 287     entry->attached = FALSE;
 288     entry->id = 0;
 289
 290     return entry;
 291 }
 292
 293 /* GL locking is done by the caller */
 294 static void context_reuse_fbo_entry(IWineD3DDevice *iface, struct fbo_entry *entry)
 295 {
 296     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 297
 298     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, entry->id));
 299     checkGLcall("glBindFramebuffer()");
 300     context_clean_fbo_attachments(This);
 301
 302     memcpy(entry->render_targets, This->render_targets, GL_LIMITS(buffers) * sizeof(*entry->render_targets));
 303     entry->depth_stencil = This->stencilBufferTarget;
 304     entry->attached = FALSE;
 305 }
 306
 307 /* GL locking is done by the caller */
 308 static void context_destroy_fbo_entry(IWineD3DDeviceImpl *This, WineD3DContext *context, struct fbo_entry *entry)
 309 {
 310     if (entry->id)
 311     {
 312         TRACE("Destroy FBO %d\n", entry->id);
 313         context_destroy_fbo(This, &entry->id);
 314     }
 315     --context->fbo_entry_count;
 316     list_remove(&entry->entry);
 317     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 318     HeapFree(GetProcessHeap(), 0, entry);
 319 }
 320
 321
 322 /* GL locking is done by the caller */
 323 static struct fbo_entry *context_find_fbo_entry(IWineD3DDevice *iface, WineD3DContext *context)
 324 {
 325     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 326     struct fbo_entry *entry;
 327
 328     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 329     {
 330         if (!memcmp(entry->render_targets, This->render_targets, GL_LIMITS(buffers) * sizeof(*entry->render_targets))
 331                 && entry->depth_stencil == This->stencilBufferTarget)
 332         {
 333             list_remove(&entry->entry);
 334             list_add_head(&context->fbo_list, &entry->entry);
 335             return entry;
 336         }
 337     }
 338
 339     if (context->fbo_entry_count < WINED3D_MAX_FBO_ENTRIES)
 340     {
 341         entry = context_create_fbo_entry(iface);
 342         list_add_head(&context->fbo_list, &entry->entry);
 343         ++context->fbo_entry_count;
 344     }
 345     else
 346     {
 347         entry = LIST_ENTRY(list_tail(&context->fbo_list), struct fbo_entry, entry);
 348         context_reuse_fbo_entry(iface, entry);
 349         list_remove(&entry->entry);
 350         list_add_head(&context->fbo_list, &entry->entry);
 351     }
 352
 353     return entry;
 354 }
 355
 356 /* GL locking is done by the caller */
 357 static void context_apply_fbo_entry(IWineD3DDevice *iface, struct fbo_entry *entry)
 358 {
 359     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 360     unsigned int i;
 361
 362     context_bind_fbo(iface, GL_FRAMEBUFFER_EXT, &entry->id);
 363
 364     if (!entry->attached)
 365     {
 366         /* Apply render targets */
 367         for (i = 0; i < GL_LIMITS(buffers); ++i)
 368         {
 369             IWineD3DSurface *render_target = This->render_targets[i];
 370             context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, i, render_target);
 371         }
 372
 373         /* Apply depth targets */
 374         if (This->stencilBufferTarget) {
 375             unsigned int w = ((IWineD3DSurfaceImpl *)This->render_targets[0])->pow2Width;
 376             unsigned int h = ((IWineD3DSurfaceImpl *)This->render_targets[0])->pow2Height;
 377
 378             surface_set_compatible_renderbuffer(This->stencilBufferTarget, w, h);
 379         }
 380         context_attach_depth_stencil_fbo(This, GL_FRAMEBUFFER_EXT, This->stencilBufferTarget, TRUE);
 381
 382         entry->attached = TRUE;
 383     } else {
 384         for (i = 0; i < GL_LIMITS(buffers); ++i)
 385         {
 386             if (This->render_targets[i])
 387                 context_apply_attachment_filter_states(iface, This->render_targets[i], FALSE);
 388         }
 389         if (This->stencilBufferTarget)
 390             context_apply_attachment_filter_states(iface, This->stencilBufferTarget, FALSE);
 391     }
 392
 393     for (i = 0; i < GL_LIMITS(buffers); ++i)
 394     {
 395         if (This->render_targets[i])
 396             This->draw_buffers[i] = GL_COLOR_ATTACHMENT0_EXT + i;
 397         else
 398             This->draw_buffers[i] = GL_NONE;
 399     }
 400 }
 401
 402 /* GL locking is done by the caller */
 403 static void context_apply_fbo_state(IWineD3DDevice *iface)
 404 {
 405     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 406     WineD3DContext *context = This->activeContext;
 407
 408     if (This->render_offscreen)
 409     {
 410         context->current_fbo = context_find_fbo_entry(iface, context);
 411         context_apply_fbo_entry(iface, context->current_fbo);
 412     } else {
 413         context->current_fbo = NULL;
 414         GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
 415     }
 416
 417     context_check_fbo_status(iface);
 418 }
 419
 420 void context_resource_released(IWineD3DDevice *iface, IWineD3DResource *resource, WINED3DRESOURCETYPE type)
 421 {
 422     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 423     UINT i;
 424
 425     switch(type)
 426     {
 427         case WINED3DRTYPE_SURFACE:
 428         {
 429             if ((IWineD3DSurface *)resource == This->lastActiveRenderTarget)
 430             {
 431                 IWineD3DSwapChainImpl *swapchain;
 432
 433                 TRACE("Last active render target destroyed.\n");
 434
 435                 /* Find a replacement surface for the currently active back
 436                  * buffer. The context manager does not do NULL checks, so
 437                  * switch to a valid target as long as the currently set
 438                  * surface is still valid. Use the surface of the implicit
 439                  * swpchain. If that is the same as the destroyed surface the
 440                  * device is destroyed and the lastActiveRenderTarget member
 441                  * shouldn't matter. */
 442                 swapchain = This->swapchains ? (IWineD3DSwapChainImpl *)This->swapchains[0] : NULL;
 443                 if (swapchain)
 444                 {
 445                     if (swapchain->backBuffer && swapchain->backBuffer[0] != (IWineD3DSurface *)resource)
 446                     {
 447                         TRACE("Activating primary back buffer.\n");
 448                         ActivateContext(This, swapchain->backBuffer[0], CTXUSAGE_RESOURCELOAD);
 449                     }
 450                     else if (!swapchain->backBuffer && swapchain->frontBuffer != (IWineD3DSurface *)resource)
 451                     {
 452                         /* Single buffering environment */
 453                         TRACE("Activating primary front buffer.\n");
 454
 455                         ActivateContext(This, swapchain->frontBuffer, CTXUSAGE_RESOURCELOAD);
 456                     }
 457                     else
 458                     {
 459                         /* Implicit render target destroyed, that means the
 460                          * device is being destroyed whatever we set here, it
 461                          * shouldn't matter. */
 462                         TRACE("Device is being destroyed, setting lastActiveRenderTarget to 0xdeadbabe.\n");
 463
 464                         This->lastActiveRenderTarget = (IWineD3DSurface *) 0xdeadbabe;
 465                     }
 466                 }
 467                 else
 468                 {
 469                     WARN("Render target set, but swapchain does not exist!\n");
 470
 471                     /* May happen during ddraw uninitialization. */
 472                     This->lastActiveRenderTarget = (IWineD3DSurface *)0xdeadcafe;
 473                 }
 474             }
 475             else if (This->d3d_initialized)
 476             {
 477                 ActivateContext(This, This->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
 478             }
 479
 480             for (i = 0; i < This->numContexts; ++i)
 481             {
 482                 WineD3DContext *context = This->contexts[i];
 483                 struct fbo_entry *entry, *entry2;
 484
 485                 ENTER_GL();
 486
 487                 LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry)
 488                 {
 489                     BOOL destroyed = FALSE;
 490                     UINT j;
 491
 492                     for (j = 0; !destroyed && j < GL_LIMITS(buffers); ++j)
 493                     {
 494                         if (entry->render_targets[j] == (IWineD3DSurface *)resource)
 495                         {
 496                             context_destroy_fbo_entry(This, context, entry);
 497                             destroyed = TRUE;
 498                         }
 499                     }
 500
 501                     if (!destroyed && entry->depth_stencil == (IWineD3DSurface *)resource)
 502                         context_destroy_fbo_entry(This, context, entry);
 503                 }
 504
 505                 LEAVE_GL();
 506             }
 507
 508             break;
 509         }
 510
 511         default:
 512             break;
 513     }
 514 }
 515
 516 /*****************************************************************************
 517  * Context_MarkStateDirty
 518  *
 519  * Marks a state in a context dirty. Only one context, opposed to
 520  * IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
 521  * contexts
 522  *
 523  * Params:
 524  *  context: Context to mark the state dirty in
 525  *  state: State to mark dirty
 526  *  StateTable: Pointer to the state table in use(for state grouping)
 527  *
 528  *****************************************************************************/
 529 static void Context_MarkStateDirty(WineD3DContext *context, DWORD state, const struct StateEntry *StateTable) {
 530     DWORD rep = StateTable[state].representative;
 531     DWORD idx;
 532     BYTE shift;
 533
 534     if(!rep || isStateDirty(context, rep)) return;
 535
 536     context->dirtyArray[context->numDirtyEntries++] = rep;
 537     idx = rep >> 5;
 538     shift = rep & 0x1f;
 539     context->isStateDirty[idx] |= (1 << shift);
 540 }
 541
 542 /*****************************************************************************
 543  * AddContextToArray
 544  *
 545  * Adds a context to the context array. Helper function for CreateContext
 546  *
 547  * This method is not called in performance-critical code paths, only when a
 548  * new render target or swapchain is created. Thus performance is not an issue
 549  * here.
 550  *
 551  * Params:
 552  *  This: Device to add the context for
 553  *  hdc: device context
 554  *  glCtx: WGL context to add
 555  *  pbuffer: optional pbuffer used with this context
 556  *
 557  *****************************************************************************/
 558 static WineD3DContext *AddContextToArray(IWineD3DDeviceImpl *This, HWND win_handle, HDC hdc, HGLRC glCtx, HPBUFFERARB pbuffer) {
 559     WineD3DContext **oldArray = This->contexts;
 560     DWORD state;
 561
 562     This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * (This->numContexts + 1));
 563     if(This->contexts == NULL) {
 564         ERR("Unable to grow the context array\n");
 565         This->contexts = oldArray;
 566         return NULL;
 567     }
 568     if(oldArray) {
 569         memcpy(This->contexts, oldArray, sizeof(*This->contexts) * This->numContexts);
 570     }
 571
 572     This->contexts[This->numContexts] = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WineD3DContext));
 573     if(This->contexts[This->numContexts] == NULL) {
 574         ERR("Unable to allocate a new context\n");
 575         HeapFree(GetProcessHeap(), 0, This->contexts);
 576         This->contexts = oldArray;
 577         return NULL;
 578     }
 579
 580     This->contexts[This->numContexts]->hdc = hdc;
 581     This->contexts[This->numContexts]->glCtx = glCtx;
 582     This->contexts[This->numContexts]->pbuffer = pbuffer;
 583     This->contexts[This->numContexts]->win_handle = win_handle;
 584     HeapFree(GetProcessHeap(), 0, oldArray);
 585
 586     /* Mark all states dirty to force a proper initialization of the states on the first use of the context
 587      */
 588     for(state = 0; state <= STATE_HIGHEST; state++) {
 589         Context_MarkStateDirty(This->contexts[This->numContexts], state, This->StateTable);
 590     }
 591
 592     This->numContexts++;
 593     TRACE("Created context %p\n", This->contexts[This->numContexts - 1]);
 594     return This->contexts[This->numContexts - 1];
 595 }
 596
 597 /* This function takes care of WineD3D pixel format selection. */
 598 static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc,
 599         const struct GlPixelFormatDesc *color_format_desc, const struct GlPixelFormatDesc *ds_format_desc,
 600         BOOL auxBuffers, int numSamples, BOOL pbuffer, BOOL findCompatible)
 601 {
 602     int iPixelFormat=0;
 603     unsigned int matchtry;
 604     short redBits, greenBits, blueBits, alphaBits, colorBits;
 605     short depthBits=0, stencilBits=0;
 606
 607     struct match_type {
 608         BOOL require_aux;
 609         BOOL exact_alpha;
 610         BOOL exact_color;
 611     } matches[] = {
 612         /* First, try without alpha match buffers. MacOS supports aux buffers only
 613          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
 614          * Then try without aux buffers - this is the most common cause for not
 615          * finding a pixel format. Also some drivers(the open source ones)
 616          * only offer 32 bit ARB pixel formats. First try without an exact alpha
 617          * match, then try without an exact alpha and color match.
 618          */
 619         { TRUE,  TRUE,  TRUE  },
 620         { TRUE,  FALSE, TRUE  },
 621         { FALSE, TRUE,  TRUE  },
 622         { FALSE, FALSE, TRUE  },
 623         { TRUE,  FALSE, FALSE },
 624         { FALSE, FALSE, FALSE },
 625     };
 626
 627     int i = 0;
 628     int nCfgs = This->adapter->nCfgs;
 629
 630     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, pbuffer=%d, findCompatible=%d\n",
 631           debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format),
 632           auxBuffers, numSamples, pbuffer, findCompatible);
 633
 634     if (!getColorBits(color_format_desc, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits))
 635     {
 636         ERR("Unable to get color bits for format %s (%#x)!\n",
 637                 debug_d3dformat(color_format_desc->format), color_format_desc->format);
 638         return 0;
 639     }
 640
 641     /* In WGL both color, depth and stencil are features of a pixel format. In case of D3D they are separate.
 642      * You are able to add a depth + stencil surface at a later stage when you need it.
 643      * In order to support this properly in WineD3D we need the ability to recreate the opengl context and
 644      * drawable when this is required. This is very tricky as we need to reapply ALL opengl states for the new
 645      * context, need torecreate shaders, textures and other resources.
 646      *
 647      * The context manager already takes care of the state problem and for the other tasks code from Reset
 648      * can be used. These changes are way to risky during the 1.0 code freeze which is taking place right now.
 649      * Likely a lot of other new bugs will be exposed. For that reason request a depth stencil surface all the
 650      * time. It can cause a slight performance hit but fixes a lot of regressions. A fixme reminds of that this
 651      * issue needs to be fixed. */
 652     if (ds_format_desc->format != WINED3DFMT_D24S8)
 653     {
 654         FIXME("Add OpenGL context recreation support to SetDepthStencilSurface\n");
 655         ds_format_desc = getFormatDescEntry(WINED3DFMT_D24S8, &This->adapter->gl_info);
 656     }
 657
 658     getDepthStencilBits(ds_format_desc, &depthBits, &stencilBits);
 659
 660     for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
 661         for(i=0; i<nCfgs; i++) {
 662             BOOL exactDepthMatch = TRUE;
 663             WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
 664
 665             /* For now only accept RGBA formats. Perhaps some day we will
 666              * allow floating point formats for pbuffers. */
 667             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
 668                 continue;
 669
 670             /* In window mode (!pbuffer) we need a window drawable format and double buffering. */
 671             if(!pbuffer && !(cfg->windowDrawable && cfg->doubleBuffer))
 672                 continue;
 673
 674             /* We like to have aux buffers in backbuffer mode */
 675             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
 676                 continue;
 677
 678             /* In pbuffer-mode we need a pbuffer-capable format but we don't want double buffering */
 679             if(pbuffer && (!cfg->pbufferDrawable || cfg->doubleBuffer))
 680                 continue;
 681
 682             if(matches[matchtry].exact_color) {
 683                 if(cfg->redSize != redBits)
 684                     continue;
 685                 if(cfg->greenSize != greenBits)
 686                     continue;
 687                 if(cfg->blueSize != blueBits)
 688                     continue;
 689             } else {
 690                 if(cfg->redSize < redBits)
 691                     continue;
 692                 if(cfg->greenSize < greenBits)
 693                     continue;
 694                 if(cfg->blueSize < blueBits)
 695                     continue;
 696             }
 697             if(matches[matchtry].exact_alpha) {
 698                 if(cfg->alphaSize != alphaBits)
 699                     continue;
 700             } else {
 701                 if(cfg->alphaSize < alphaBits)
 702                     continue;
 703             }
 704
 705             /* We try to locate a format which matches our requirements exactly. In case of
 706              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
 707             if(cfg->depthSize < depthBits)
 708                 continue;
 709             else if(cfg->depthSize > depthBits)
 710                 exactDepthMatch = FALSE;
 711
 712             /* In all cases make sure the number of stencil bits matches our requirements
 713              * even when we don't need stencil because it could affect performance EXCEPT
 714              * on cards which don't offer depth formats without stencil like the i915 drivers
 715              * on Linux. */
 716             if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
 717                 continue;
 718
 719             /* Check multisampling support */
 720             if(cfg->numSamples != numSamples)
 721                 continue;
 722
 723             /* When we have passed all the checks then we have found a format which matches our
 724              * requirements. Note that we only check for a limit number of capabilities right now,
 725              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
 726              * can still differ in things like multisampling, stereo, SRGB and other flags.
 727              */
 728
 729             /* Exit the loop as we have found a format :) */
 730             if(exactDepthMatch) {
 731                 iPixelFormat = cfg->iPixelFormat;
 732                 break;
 733             } else if(!iPixelFormat) {
 734                 /* In the end we might end up with a format which doesn't exactly match our depth
 735                  * requirements. Accept the first format we found because formats with higher iPixelFormat
 736                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
 737                 iPixelFormat = cfg->iPixelFormat;
 738             }
 739         }
 740     }
 741
 742     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
 743     if(!iPixelFormat && !findCompatible) {
 744         ERR("Can't find a suitable iPixelFormat\n");
 745         return FALSE;
 746     } else if(!iPixelFormat) {
 747         PIXELFORMATDESCRIPTOR pfd;
 748
 749         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
 750         /* PixelFormat selection */
 751         ZeroMemory(&pfd, sizeof(pfd));
 752         pfd.nSize      = sizeof(pfd);
 753         pfd.nVersion   = 1;
 754         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 755         pfd.iPixelType = PFD_TYPE_RGBA;
 756         pfd.cAlphaBits = alphaBits;
 757         pfd.cColorBits = colorBits;
 758         pfd.cDepthBits = depthBits;
 759         pfd.cStencilBits = stencilBits;
 760         pfd.iLayerType = PFD_MAIN_PLANE;
 761
 762         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 763         if(!iPixelFormat) {
 764             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 765             ERR("Can't find a suitable iPixelFormat\n");
 766             return FALSE;
 767         }
 768     }
 769
 770     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n",
 771             iPixelFormat, debug_d3dformat(color_format_desc->format), debug_d3dformat(ds_format_desc->format));
 772     return iPixelFormat;
 773 }
 774
 775 /*****************************************************************************
 776  * CreateContext
 777  *
 778  * Creates a new context for a window, or a pbuffer context.
 779  *
 780  * * Params:
 781  *  This: Device to activate the context for
 782  *  target: Surface this context will render to
 783  *  win_handle: handle to the window which we are drawing to
 784  *  create_pbuffer: tells whether to create a pbuffer or not
 785  *  pPresentParameters: contains the pixelformats to use for onscreen rendering
 786  *
 787  *****************************************************************************/
 788 WineD3DContext *CreateContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target, HWND win_handle, BOOL create_pbuffer, const WINED3DPRESENT_PARAMETERS *pPresentParms) {
 789     HDC oldDrawable, hdc;
 790     HPBUFFERARB pbuffer = NULL;
 791     HGLRC ctx = NULL, oldCtx;
 792     WineD3DContext *ret = NULL;
 793     unsigned int s;
 794
 795     TRACE("(%p): Creating a %s context for render target %p\n", This, create_pbuffer ? "offscreen" : "onscreen", target);
 796
 797     if(create_pbuffer) {
 798         HDC hdc_parent = GetDC(win_handle);
 799         int iPixelFormat = 0;
 800
 801         IWineD3DSurface *StencilSurface = This->stencilBufferTarget;
 802         const struct GlPixelFormatDesc *ds_format_desc = StencilSurface
 803                 ? ((IWineD3DSurfaceImpl *)StencilSurface)->resource.format_desc
 804                 : getFormatDescEntry(WINED3DFMT_UNKNOWN, &This->adapter->gl_info);
 805
 806         /* Try to find a pixel format with pbuffer support. */
 807         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format_desc,
 808                 ds_format_desc, FALSE /* auxBuffers */, 0 /* numSamples */, TRUE /* PBUFFER */,
 809                 FALSE /* findCompatible */);
 810         if(!iPixelFormat) {
 811             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 812
 813             /* For some reason we weren't able to find a format, try to find something instead of crashing.
 814              * A reason for failure could have been wglChoosePixelFormatARB strictness. */
 815             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format_desc,
 816                     ds_format_desc, FALSE /* auxBuffer */, 0 /* numSamples */, TRUE /* PBUFFER */,
 817                     TRUE /* findCompatible */);
 818         }
 819
 820         /* This shouldn't happen as ChoosePixelFormat always returns something */
 821         if(!iPixelFormat) {
 822             ERR("Unable to locate a pixel format for a pbuffer\n");
 823             ReleaseDC(win_handle, hdc_parent);
 824             goto out;
 825         }
 826
 827         TRACE("Creating a pBuffer drawable for the new context\n");
 828         pbuffer = GL_EXTCALL(wglCreatePbufferARB(hdc_parent, iPixelFormat, target->currentDesc.Width, target->currentDesc.Height, 0));
 829         if(!pbuffer) {
 830             ERR("Cannot create a pbuffer\n");
 831             ReleaseDC(win_handle, hdc_parent);
 832             goto out;
 833         }
 834
 835         /* In WGL a pbuffer is 'wrapped' inside a HDC to 'fool' wglMakeCurrent */
 836         hdc = GL_EXTCALL(wglGetPbufferDCARB(pbuffer));
 837         if(!hdc) {
 838             ERR("Cannot get a HDC for pbuffer (%p)\n", pbuffer);
 839             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 840             ReleaseDC(win_handle, hdc_parent);
 841             goto out;
 842         }
 843         ReleaseDC(win_handle, hdc_parent);
 844     } else {
 845         PIXELFORMATDESCRIPTOR pfd;
 846         int iPixelFormat;
 847         int res;
 848         const struct GlPixelFormatDesc *color_format_desc = target->resource.format_desc;
 849         const struct GlPixelFormatDesc *ds_format_desc = getFormatDescEntry(WINED3DFMT_UNKNOWN,
 850                 &This->adapter->gl_info);
 851         BOOL auxBuffers = FALSE;
 852         int numSamples = 0;
 853
 854         hdc = GetDC(win_handle);
 855         if(hdc == NULL) {
 856             ERR("Cannot retrieve a device context!\n");
 857             goto out;
 858         }
 859
 860         /* In case of ORM_BACKBUFFER, make sure to request an alpha component for X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
 861         if(wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 862             auxBuffers = TRUE;
 863
 864             if (color_format_desc->format == WINED3DFMT_X4R4G4B4)
 865                 color_format_desc = getFormatDescEntry(WINED3DFMT_A4R4G4B4, &This->adapter->gl_info);
 866             else if (color_format_desc->format == WINED3DFMT_X8R8G8B8)
 867                 color_format_desc = getFormatDescEntry(WINED3DFMT_A8R8G8B8, &This->adapter->gl_info);
 868         }
 869
 870         /* DirectDraw supports 8bit paletted render targets and these are used by old games like Starcraft and C&C.
 871          * Most modern hardware doesn't support 8bit natively so we perform some form of 8bit -> 32bit conversion.
 872          * The conversion (ab)uses the alpha component for storing the palette index. For this reason we require
 873          * a format with 8bit alpha, so request A8R8G8B8. */
 874         if (color_format_desc->format == WINED3DFMT_P8)
 875             color_format_desc = getFormatDescEntry(WINED3DFMT_A8R8G8B8, &This->adapter->gl_info);
 876
 877         /* Retrieve the depth stencil format from the present parameters.
 878          * The choice of the proper format can give a nice performance boost
 879          * in case of GPU limited programs. */
 880         if(pPresentParms->EnableAutoDepthStencil) {
 881             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 882             ds_format_desc = getFormatDescEntry(pPresentParms->AutoDepthStencilFormat, &This->adapter->gl_info);
 883         }
 884
 885         /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD */
 886         if(pPresentParms->MultiSampleType && (pPresentParms->SwapEffect == WINED3DSWAPEFFECT_DISCARD)) {
 887             if(!GL_SUPPORT(ARB_MULTISAMPLE))
 888                 ERR("The program is requesting multisampling without support!\n");
 889             else {
 890                 ERR("Requesting MultiSampleType=%d\n", pPresentParms->MultiSampleType);
 891                 numSamples = pPresentParms->MultiSampleType;
 892             }
 893         }
 894
 895         /* Try to find a pixel format which matches our requirements */
 896         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, color_format_desc, ds_format_desc,
 897                 auxBuffers, numSamples, FALSE /* PBUFFER */, FALSE /* findCompatible */);
 898
 899         /* Try to locate a compatible format if we weren't able to find anything */
 900         if(!iPixelFormat) {
 901             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 902             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, color_format_desc, ds_format_desc,
 903                     auxBuffers, 0 /* numSamples */, FALSE /* PBUFFER */, TRUE /* findCompatible */ );
 904         }
 905
 906         /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
 907         if(!iPixelFormat) {
 908             ERR("Can't find a suitable iPixelFormat\n");
 909             return FALSE;
 910         }
 911
 912         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 913         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 914         if(!res) {
 915             int oldPixelFormat = GetPixelFormat(hdc);
 916
 917             /* By default WGL doesn't allow pixel format adjustments but we need it here.
 918              * For this reason there is a WINE-specific wglSetPixelFormat which allows you to
 919              * set the pixel format multiple times. Only use it when it is really needed. */
 920
 921             if(oldPixelFormat == iPixelFormat) {
 922                 /* We don't have to do anything as the formats are the same :) */
 923             } else if(oldPixelFormat && GL_SUPPORT(WGL_WINE_PIXEL_FORMAT_PASSTHROUGH)) {
 924                 res = GL_EXTCALL(wglSetPixelFormatWINE(hdc, iPixelFormat, NULL));
 925
 926                 if(!res) {
 927                     ERR("wglSetPixelFormatWINE failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 928                     return FALSE;
 929                 }
 930             } else if(oldPixelFormat) {
 931                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 932                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 933                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 934             } else {
 935                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 936                 return FALSE;
 937             }
 938         }
 939     }
 940
 941     ctx = pwglCreateContext(hdc);
 942     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 943
 944     if(!ctx) {
 945         ERR("Failed to create a WGL context\n");
 946         if(create_pbuffer) {
 947             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 948             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 949         }
 950         goto out;
 951     }
 952     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 953     if(!ret) {
 954         ERR("Failed to add the newly created context to the context list\n");
 955         pwglDeleteContext(ctx);
 956         if(create_pbuffer) {
 957             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 958             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 959         }
 960         goto out;
 961     }
 962     ret->surface = (IWineD3DSurface *) target;
 963     ret->isPBuffer = create_pbuffer;
 964     ret->tid = GetCurrentThreadId();
 965     if(This->shader_backend->shader_dirtifyable_constants((IWineD3DDevice *) This)) {
 966         /* Create the dirty constants array and initialize them to dirty */
 967         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 968                 sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 969         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 970                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 971         memset(ret->vshader_const_dirty, 1,
 972                sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 973         memset(ret->pshader_const_dirty, 1,
 974                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 975     }
 976
 977     TRACE("Successfully created new context %p\n", ret);
 978
 979     list_init(&ret->fbo_list);
 980
 981     /* Set up the context defaults */
 982     oldCtx  = pwglGetCurrentContext();
 983     oldDrawable = pwglGetCurrentDC();
 984     if(oldCtx && oldDrawable) {
 985         /* See comment in ActivateContext context switching */
 986         This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
 987     }
 988     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 989         ERR("Cannot activate context to set up defaults\n");
 990         goto out;
 991     }
 992
 993     ENTER_GL();
 994
 995     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
 996
 997     TRACE("Setting up the screen\n");
 998     /* Clear the screen */
 999     glClearColor(1.0, 0.0, 0.0, 0.0);
1000     checkGLcall("glClearColor");
1001     glClearIndex(0);
1002     glClearDepth(1);
1003     glClearStencil(0xffff);
1004
1005     checkGLcall("glClear");
1006
1007     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
1008     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
1009
1010     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
1011     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
1012
1013     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
1014     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
1015
1016     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
1017     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
1018     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
1019     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
1020
1021     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
1022         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
1023          * and textures in DIB sections(due to the memory protection).
1024          */
1025         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
1026         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
1027     }
1028     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
1029         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
1030          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
1031          * GL_VERTEX_BLEND_ARB isn't enabled too
1032          */
1033         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
1034         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
1035     }
1036     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
1037         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
1038          * the previous texture where to source the offset from is always unit - 1.
1039          */
1040         for(s = 1; s < GL_LIMITS(textures); s++) {
1041             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1042             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
1043             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
1044         }
1045     }
1046     if(GL_SUPPORT(ARB_FRAGMENT_PROGRAM)) {
1047         /* MacOS(radeon X1600 at least, but most likely others too) refuses to draw if GLSL and ARBFP are
1048          * enabled, but the currently bound arbfp program is 0. Enabling ARBFP with prog 0 is invalid, but
1049          * GLSL should bypass this. This causes problems in programs that never use the fixed function pipeline,
1050          * because the ARBFP extension is enabled by the ARBFP pipeline at context creation, but no program
1051          * is ever assigned.
1052          *
1053          * So make sure a program is assigned to each context. The first real ARBFP use will set a different
1054          * program and the dummy program is destroyed when the context is destroyed.
1055          */
1056         const char *dummy_program =
1057                 "!!ARBfp1.0\n"
1058                 "MOV result.color, fragment.color.primary;\n"
1059                 "END\n";
1060         GL_EXTCALL(glGenProgramsARB(1, &ret->dummy_arbfp_prog));
1061         GL_EXTCALL(glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, ret->dummy_arbfp_prog));
1062         GL_EXTCALL(glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(dummy_program), dummy_program));
1063     }
1064
1065     for(s = 0; s < GL_LIMITS(point_sprite_units); s++) {
1066         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
1067         glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
1068         checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
1069     }
1070     LEAVE_GL();
1071
1072     /* Never keep GL_FRAGMENT_SHADER_ATI enabled on a context that we switch away from,
1073      * but enable it for the first context we create, and reenable it on the old context
1074      */
1075     if(oldDrawable && oldCtx) {
1076         if (!pwglMakeCurrent(oldDrawable, oldCtx))
1077         {
1078             ERR("Failed to make previous GL context %p current.\n", oldCtx);
1079         }
1080     } else {
1081         last_device = This;
1082     }
1083     This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1084
1085     return ret;
1086
1087 out:
1088     return NULL;
1089 }
1090
1091 /*****************************************************************************
1092  * RemoveContextFromArray
1093  *
1094  * Removes a context from the context manager. The opengl context is not
1095  * destroyed or unset. context is not a valid pointer after that call.
1096  *
1097  * Similar to the former call this isn't a performance critical function. A
1098  * helper function for DestroyContext.
1099  *
1100  * Params:
1101  *  This: Device to activate the context for
1102  *  context: Context to remove
1103  *
1104  *****************************************************************************/
1105 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
1106     WineD3DContext **new_array;
1107     BOOL found = FALSE;
1108     UINT i;
1109
1110     TRACE("Removing ctx %p\n", context);
1111
1112     for (i = 0; i < This->numContexts; ++i)
1113     {
1114         if (This->contexts[i] == context)
1115         {
1116             HeapFree(GetProcessHeap(), 0, context);
1117             found = TRUE;
1118             break;
1119         }
1120     }
1121
1122     if (!found)
1123     {
1124         ERR("Context %p doesn't exist in context array\n", context);
1125         return;
1126     }
1127
1128     while (i < This->numContexts - 1)
1129     {
1130         This->contexts[i] = This->contexts[i + 1];
1131         ++i;
1132     }
1133
1134     --This->numContexts;
1135     if (!This->numContexts)
1136     {
1137         HeapFree(GetProcessHeap(), 0, This->contexts);
1138         This->contexts = NULL;
1139         return;
1140     }
1141
1142     new_array = HeapReAlloc(GetProcessHeap(), 0, This->contexts, This->numContexts * sizeof(*This->contexts));
1143     if (!new_array)
1144     {
1145         ERR("Failed to shrink context array. Oh well.\n");
1146         return;
1147     }
1148
1149     This->contexts = new_array;
1150 }
1151
1152 /*****************************************************************************
1153  * DestroyContext
1154  *
1155  * Destroys a wineD3DContext
1156  *
1157  * Params:
1158  *  This: Device to activate the context for
1159  *  context: Context to destroy
1160  *
1161  *****************************************************************************/
1162 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
1163     struct fbo_entry *entry, *entry2;
1164     BOOL has_glctx;
1165
1166     TRACE("Destroying ctx %p\n", context);
1167
1168     /* The correct GL context needs to be active to cleanup the GL resources below */
1169     has_glctx = pwglMakeCurrent(context->hdc, context->glCtx);
1170     last_device = NULL;
1171
1172     if (!has_glctx) WARN("Failed to activate context. Window already destroyed?\n");
1173
1174     ENTER_GL();
1175
1176     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry) {
1177         if (!has_glctx) entry->id = 0;
1178         context_destroy_fbo_entry(This, context, entry);
1179     }
1180     if (has_glctx)
1181     {
1182         if (context->src_fbo)
1183         {
1184             TRACE("Destroy src FBO %d\n", context->src_fbo);
1185             context_destroy_fbo(This, &context->src_fbo);
1186         }
1187         if (context->dst_fbo)
1188         {
1189             TRACE("Destroy dst FBO %d\n", context->dst_fbo);
1190             context_destroy_fbo(This, &context->dst_fbo);
1191         }
1192         if (context->dummy_arbfp_prog)
1193         {
1194             GL_EXTCALL(glDeleteProgramsARB(1, &context->dummy_arbfp_prog));
1195         }
1196     }
1197
1198     LEAVE_GL();
1199
1200     if (This->activeContext == context)
1201     {
1202         This->activeContext = NULL;
1203         TRACE("Destroying the active context.\n");
1204     }
1205
1206     /* Cleanup the GL context */
1207     if (!pwglMakeCurrent(NULL, NULL))
1208     {
1209         ERR("Failed to disable GL context.\n");
1210     }
1211
1212     if(context->isPBuffer) {
1213         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
1214         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
1215     } else ReleaseDC(context->win_handle, context->hdc);
1216     pwglDeleteContext(context->glCtx);
1217
1218     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1219     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1220     RemoveContextFromArray(This, context);
1221 }
1222
1223 /* GL locking is done by the caller */
1224 static inline void set_blit_dimension(UINT width, UINT height) {
1225     glMatrixMode(GL_PROJECTION);
1226     checkGLcall("glMatrixMode(GL_PROJECTION)");
1227     glLoadIdentity();
1228     checkGLcall("glLoadIdentity()");
1229     glOrtho(0, width, height, 0, 0.0, -1.0);
1230     checkGLcall("glOrtho");
1231     glViewport(0, 0, width, height);
1232     checkGLcall("glViewport");
1233 }
1234
1235 /*****************************************************************************
1236  * SetupForBlit
1237  *
1238  * Sets up a context for DirectDraw blitting.
1239  * All texture units are disabled, texture unit 0 is set as current unit
1240  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1241  * color writing enabled for all channels
1242  * register combiners disabled, shaders disabled
1243  * world matrix is set to identity, texture matrix 0 too
1244  * projection matrix is setup for drawing screen coordinates
1245  *
1246  * Params:
1247  *  This: Device to activate the context for
1248  *  context: Context to setup
1249  *  width: render target width
1250  *  height: render target height
1251  *
1252  *****************************************************************************/
1253 /* Context activation is done by the caller. */
1254 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
1255     int i, sampler;
1256     const struct StateEntry *StateTable = This->StateTable;
1257
1258     TRACE("Setting up context %p for blitting\n", context);
1259     if(context->last_was_blit) {
1260         if(context->blit_w != width || context->blit_h != height) {
1261             ENTER_GL();
1262             set_blit_dimension(width, height);
1263             LEAVE_GL();
1264             context->blit_w = width; context->blit_h = height;
1265             /* No need to dirtify here, the states are still dirtified because they weren't
1266              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1267              * be set
1268              */
1269         }
1270         TRACE("Context is already set up for blitting, nothing to do\n");
1271         return;
1272     }
1273     context->last_was_blit = TRUE;
1274
1275     /* TODO: Use a display list */
1276
1277     /* Disable shaders */
1278     ENTER_GL();
1279     This->shader_backend->shader_select((IWineD3DDevice *)This, FALSE, FALSE);
1280     LEAVE_GL();
1281
1282     Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1283     Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1284
1285     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1286      * helper functions in between gl calls. This function is full of Context_MarkStateDirty
1287      * which can safely be called from here, we only lock once instead locking/unlocking
1288      * after each GL call.
1289      */
1290     ENTER_GL();
1291
1292     /* Disable all textures. The caller can then bind a texture it wants to blit
1293      * from
1294      *
1295      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1296      * function texture unit. No need to care for higher samplers
1297      */
1298     for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
1299         sampler = This->rev_tex_unit_map[i];
1300         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1301         checkGLcall("glActiveTextureARB");
1302
1303         if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1304             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1305             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1306         }
1307         glDisable(GL_TEXTURE_3D);
1308         checkGLcall("glDisable GL_TEXTURE_3D");
1309         if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1310             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1311             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1312         }
1313         glDisable(GL_TEXTURE_2D);
1314         checkGLcall("glDisable GL_TEXTURE_2D");
1315
1316         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1317         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1318
1319         if (sampler != -1) {
1320             if (sampler < MAX_TEXTURES) {
1321                 Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1322             }
1323             Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1324         }
1325     }
1326     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1327     checkGLcall("glActiveTextureARB");
1328
1329     sampler = This->rev_tex_unit_map[0];
1330
1331     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1332         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1333         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1334     }
1335     glDisable(GL_TEXTURE_3D);
1336     checkGLcall("glDisable GL_TEXTURE_3D");
1337     if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1338         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1339         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1340     }
1341     glDisable(GL_TEXTURE_2D);
1342     checkGLcall("glDisable GL_TEXTURE_2D");
1343
1344     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1345
1346     glMatrixMode(GL_TEXTURE);
1347     checkGLcall("glMatrixMode(GL_TEXTURE)");
1348     glLoadIdentity();
1349     checkGLcall("glLoadIdentity()");
1350
1351     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
1352         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1353                   GL_TEXTURE_LOD_BIAS_EXT,
1354                   0.0);
1355         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
1356     }
1357
1358     if (sampler != -1) {
1359         if (sampler < MAX_TEXTURES) {
1360             Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1361             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1362         }
1363         Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1364     }
1365
1366     /* Other misc states */
1367     glDisable(GL_ALPHA_TEST);
1368     checkGLcall("glDisable(GL_ALPHA_TEST)");
1369     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1370     glDisable(GL_LIGHTING);
1371     checkGLcall("glDisable GL_LIGHTING");
1372     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1373     glDisable(GL_DEPTH_TEST);
1374     checkGLcall("glDisable GL_DEPTH_TEST");
1375     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1376     glDisableWINE(GL_FOG);
1377     checkGLcall("glDisable GL_FOG");
1378     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1379     glDisable(GL_BLEND);
1380     checkGLcall("glDisable GL_BLEND");
1381     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1382     glDisable(GL_CULL_FACE);
1383     checkGLcall("glDisable GL_CULL_FACE");
1384     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1385     glDisable(GL_STENCIL_TEST);
1386     checkGLcall("glDisable GL_STENCIL_TEST");
1387     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1388     glDisable(GL_SCISSOR_TEST);
1389     checkGLcall("glDisable GL_SCISSOR_TEST");
1390     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1391     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
1392         glDisable(GL_POINT_SPRITE_ARB);
1393         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1394         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1395     }
1396     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1397     checkGLcall("glColorMask");
1398     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1399     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
1400         glDisable(GL_COLOR_SUM_EXT);
1401         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1402         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1403     }
1404
1405     /* Setup transforms */
1406     glMatrixMode(GL_MODELVIEW);
1407     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1408     glLoadIdentity();
1409     checkGLcall("glLoadIdentity()");
1410     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1411
1412     context->last_was_rhw = TRUE;
1413     Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1414
1415     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1416     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1417     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1418     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1419     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1420     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1421     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1422
1423     set_blit_dimension(width, height);
1424
1425     LEAVE_GL();
1426
1427     context->blit_w = width; context->blit_h = height;
1428     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1429     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1430
1431
1432     This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1433 }
1434
1435 /*****************************************************************************
1436  * findThreadContextForSwapChain
1437  *
1438  * Searches a swapchain for all contexts and picks one for the thread tid.
1439  * If none can be found the swapchain is requested to create a new context
1440  *
1441  *****************************************************************************/
1442 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
1443     unsigned int i;
1444
1445     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1446         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1447             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1448         }
1449
1450     }
1451
1452     /* Create a new context for the thread */
1453     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
1454 }
1455
1456 /*****************************************************************************
1457  * FindContext
1458  *
1459  * Finds a context for the current render target and thread
1460  *
1461  * Parameters:
1462  *  target: Render target to find the context for
1463  *  tid: Thread to activate the context for
1464  *
1465  * Returns: The needed context
1466  *
1467  *****************************************************************************/
1468 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
1469     IWineD3DSwapChain *swapchain = NULL;
1470     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
1471     WineD3DContext *context = This->activeContext;
1472     BOOL oldRenderOffscreen = This->render_offscreen;
1473     const struct GlPixelFormatDesc *old = ((IWineD3DSurfaceImpl *)This->lastActiveRenderTarget)->resource.format_desc;
1474     const struct GlPixelFormatDesc *new = ((IWineD3DSurfaceImpl *)target)->resource.format_desc;
1475     const struct StateEntry *StateTable = This->StateTable;
1476
1477     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
1478      * the alpha blend state changes with different render target formats
1479      */
1480     if (old->format != new->format)
1481     {
1482         /* Disable blending when the alpha mask has changed and when a format doesn't support blending */
1483         if ((old->alpha_mask && !new->alpha_mask) || (!old->alpha_mask && new->alpha_mask)
1484                 || !(new->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING))
1485         {
1486             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1487         }
1488     }
1489
1490     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
1491         TRACE("Rendering onscreen\n");
1492
1493         context = findThreadContextForSwapChain(swapchain, tid);
1494
1495         This->render_offscreen = FALSE;
1496         /* The context != This->activeContext will catch a NOP context change. This can occur
1497          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
1498          * rendering. No context change is needed in that case
1499          */
1500
1501         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
1502             if(This->pbufferContext && tid == This->pbufferContext->tid) {
1503                 This->pbufferContext->tid = 0;
1504             }
1505         }
1506         IWineD3DSwapChain_Release(swapchain);
1507
1508         if(oldRenderOffscreen) {
1509             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1510             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1511             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1512             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1513             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1514         }
1515
1516     } else {
1517         TRACE("Rendering offscreen\n");
1518         This->render_offscreen = TRUE;
1519
1520         switch(wined3d_settings.offscreen_rendering_mode) {
1521             case ORM_FBO:
1522                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
1523                 if(This->activeContext && tid == This->lastThread) {
1524                     context = This->activeContext;
1525                 } else {
1526                     /* This may happen if the app jumps straight into offscreen rendering
1527                      * Start using the context of the primary swapchain. tid == 0 is no problem
1528                      * for findThreadContextForSwapChain.
1529                      *
1530                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1531                      * is perfect to call.
1532                      */
1533                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1534                 }
1535                 break;
1536
1537             case ORM_PBUFFER:
1538             {
1539                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
1540                 if(This->pbufferContext == NULL ||
1541                    This->pbufferWidth < targetimpl->currentDesc.Width ||
1542                    This->pbufferHeight < targetimpl->currentDesc.Height) {
1543                     if(This->pbufferContext) {
1544                         DestroyContext(This, This->pbufferContext);
1545                     }
1546
1547                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
1548                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
1549                      */
1550                     This->pbufferContext = CreateContext(This, targetimpl,
1551                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
1552                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
1553                     This->pbufferWidth = targetimpl->currentDesc.Width;
1554                     This->pbufferHeight = targetimpl->currentDesc.Height;
1555                    }
1556
1557                    if(This->pbufferContext) {
1558                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
1559                            FIXME("The PBuffr context is only supported for one thread for now!\n");
1560                        }
1561                        This->pbufferContext->tid = tid;
1562                        context = This->pbufferContext;
1563                        break;
1564                    } else {
1565                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
1566                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
1567                    }
1568             }
1569
1570             case ORM_BACKBUFFER:
1571                 /* Stay with the currently active context for back buffer rendering */
1572                 if(This->activeContext && tid == This->lastThread) {
1573                     context = This->activeContext;
1574                 } else {
1575                     /* This may happen if the app jumps straight into offscreen rendering
1576                      * Start using the context of the primary swapchain. tid == 0 is no problem
1577                      * for findThreadContextForSwapChain.
1578                      *
1579                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1580                      * is perfect to call.
1581                      */
1582                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1583                 }
1584                 break;
1585         }
1586
1587         if(!oldRenderOffscreen) {
1588             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1589             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1590             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1591             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1592             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1593         }
1594     }
1595
1596     /* When switching away from an offscreen render target, and we're not using FBOs,
1597      * we have to read the drawable into the texture. This is done via PreLoad(and
1598      * SFLAG_INDRAWABLE set on the surface). There are some things that need care though.
1599      * PreLoad needs a GL context, and FindContext is called before the context is activated.
1600      * It also has to be called with the old rendertarget active, otherwise a wrong drawable
1601      * is read. This leads to these possible situations:
1602      *
1603      * 0) lastActiveRenderTarget == target && oldTid == newTid:
1604      *    Nothing to do, we don't even reach this code in this case...
1605      *
1606      * 1) lastActiveRenderTarget != target && oldTid == newTid:
1607      *    The currently active context is OK for readback. Call PreLoad, and it
1608      *    performs the read
1609      *
1610      * 2) lastActiveRenderTarget == target && oldTid != newTid:
1611      *    Nothing to do - the drawable is unchanged
1612      *
1613      * 3) lastActiveRenderTarget != target && oldTid != newTid:
1614      *    This is tricky. We have to get a context with the old drawable from somewhere
1615      *    before we can switch to the new context. In this case, PreLoad calls
1616      *    ActivateContext(lastActiveRenderTarget) from the new(current) thread. This
1617      *    is case (2) then. The old drawable is activated for the new thread, and the
1618      *    readback can be done. The recursed ActivateContext does *not* call PreLoad again.
1619      *    After that, the outer ActivateContext(which calls PreLoad) can activate the new
1620      *    target for the new thread
1621      */
1622     if (readTexture && This->lastActiveRenderTarget != target) {
1623         BOOL oldInDraw = This->isInDraw;
1624
1625         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
1626          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
1627          * when using offscreen rendering with multithreading
1628          */
1629         This->isInDraw = TRUE;
1630
1631         /* Do that before switching the context:
1632          * Read the back buffer of the old drawable into the destination texture
1633          */
1634         if(((IWineD3DSurfaceImpl *)This->lastActiveRenderTarget)->glDescription.srgbTextureName) {
1635             surface_internal_preload(This->lastActiveRenderTarget, SRGB_BOTH);
1636         } else {
1637             surface_internal_preload(This->lastActiveRenderTarget, SRGB_RGB);
1638         }
1639
1640         /* Assume that the drawable will be modified by some other things now */
1641         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
1642
1643         This->isInDraw = oldInDraw;
1644     }
1645
1646     return context;
1647 }
1648
1649 /* Context activation is done by the caller. */
1650 static void apply_draw_buffer(IWineD3DDeviceImpl *This, IWineD3DSurface *target, BOOL blit)
1651 {
1652     IWineD3DSwapChain *swapchain;
1653
1654     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain)))
1655     {
1656         IWineD3DSwapChain_Release((IUnknown *)swapchain);
1657         ENTER_GL();
1658         glDrawBuffer(surface_get_gl_buffer(target, swapchain));
1659         checkGLcall("glDrawBuffers()");
1660         LEAVE_GL();
1661     }
1662     else
1663     {
1664         ENTER_GL();
1665         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1666         {
1667             if (!blit)
1668             {
1669                 if (GL_SUPPORT(ARB_DRAW_BUFFERS))
1670                 {
1671                     GL_EXTCALL(glDrawBuffersARB(GL_LIMITS(buffers), This->draw_buffers));
1672                     checkGLcall("glDrawBuffers()");
1673                 }
1674                 else
1675                 {
1676                     glDrawBuffer(This->draw_buffers[0]);
1677                     checkGLcall("glDrawBuffer()");
1678                 }
1679             } else {
1680                 glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
1681                 checkGLcall("glDrawBuffer()");
1682             }
1683         }
1684         else
1685         {
1686             glDrawBuffer(This->offscreenBuffer);
1687             checkGLcall("glDrawBuffer()");
1688         }
1689         LEAVE_GL();
1690     }
1691 }
1692
1693 /*****************************************************************************
1694  * ActivateContext
1695  *
1696  * Finds a rendering context and drawable matching the device and render
1697  * target for the current thread, activates them and puts them into the
1698  * requested state.
1699  *
1700  * Params:
1701  *  This: Device to activate the context for
1702  *  target: Requested render target
1703  *  usage: Prepares the context for blitting, drawing or other actions
1704  *
1705  *****************************************************************************/
1706 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
1707     DWORD                         tid = GetCurrentThreadId();
1708     DWORD                         i, dirtyState, idx;
1709     BYTE                          shift;
1710     WineD3DContext                *context;
1711     const struct StateEntry       *StateTable = This->StateTable;
1712
1713     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
1714     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
1715         context = FindContext(This, target, tid);
1716         context->draw_buffer_dirty = TRUE;
1717         This->lastActiveRenderTarget = target;
1718         This->lastThread = tid;
1719     } else {
1720         /* Stick to the old context */
1721         context = This->activeContext;
1722     }
1723
1724     /* Activate the opengl context */
1725     if(last_device != This || context != This->activeContext) {
1726         BOOL ret;
1727
1728         /* Prevent an unneeded context switch as those are expensive */
1729         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
1730             TRACE("Already using gl context %p\n", context->glCtx);
1731         }
1732         else {
1733             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
1734
1735             ret = pwglMakeCurrent(context->hdc, context->glCtx);
1736             if(ret == FALSE) {
1737                 ERR("Failed to activate the new context\n");
1738             } else if(!context->last_was_blit) {
1739                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1740             } else {
1741                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1742             }
1743         }
1744         if(This->activeContext->vshader_const_dirty) {
1745             memset(This->activeContext->vshader_const_dirty, 1,
1746                    sizeof(*This->activeContext->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
1747         }
1748         if(This->activeContext->pshader_const_dirty) {
1749             memset(This->activeContext->pshader_const_dirty, 1,
1750                    sizeof(*This->activeContext->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
1751         }
1752         This->activeContext = context;
1753         last_device = This;
1754     }
1755
1756     switch (usage) {
1757         case CTXUSAGE_CLEAR:
1758         case CTXUSAGE_DRAWPRIM:
1759             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1760                 ENTER_GL();
1761                 context_apply_fbo_state((IWineD3DDevice *)This);
1762                 LEAVE_GL();
1763             }
1764             if (context->draw_buffer_dirty) {
1765                 apply_draw_buffer(This, target, FALSE);
1766                 context->draw_buffer_dirty = FALSE;
1767             }
1768             break;
1769
1770         case CTXUSAGE_BLIT:
1771             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1772                 if (This->render_offscreen) {
1773                     FIXME("Activating for CTXUSAGE_BLIT for an offscreen target with ORM_FBO. This should be avoided.\n");
1774                     ENTER_GL();
1775                     context_bind_fbo((IWineD3DDevice *)This, GL_FRAMEBUFFER_EXT, &context->dst_fbo);
1776                     context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, 0, target);
1777                     context_attach_depth_stencil_fbo(This, GL_FRAMEBUFFER_EXT, NULL, FALSE);
1778                     LEAVE_GL();
1779                 } else {
1780                     ENTER_GL();
1781                     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
1782                     checkGLcall("glFramebufferRenderbufferEXT");
1783                     LEAVE_GL();
1784                 }
1785                 context->draw_buffer_dirty = TRUE;
1786             }
1787             if (context->draw_buffer_dirty) {
1788                 apply_draw_buffer(This, target, TRUE);
1789                 if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
1790                     context->draw_buffer_dirty = FALSE;
1791                 }
1792             }
1793             break;
1794
1795         default:
1796             break;
1797     }
1798
1799     switch(usage) {
1800         case CTXUSAGE_RESOURCELOAD:
1801             /* This does not require any special states to be set up */
1802             break;
1803
1804         case CTXUSAGE_CLEAR:
1805             if(context->last_was_blit) {
1806                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1807             }
1808
1809             /* Blending and clearing should be orthogonal, but tests on the nvidia driver show that disabling
1810              * blending when clearing improves the clearing performance incredibly.
1811              */
1812             ENTER_GL();
1813             glDisable(GL_BLEND);
1814             LEAVE_GL();
1815             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1816
1817             ENTER_GL();
1818             glEnable(GL_SCISSOR_TEST);
1819             checkGLcall("glEnable GL_SCISSOR_TEST");
1820             LEAVE_GL();
1821             context->last_was_blit = FALSE;
1822             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1823             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1824             break;
1825
1826         case CTXUSAGE_DRAWPRIM:
1827             /* This needs all dirty states applied */
1828             if(context->last_was_blit) {
1829                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1830             }
1831
1832             IWineD3DDeviceImpl_FindTexUnitMap(This);
1833
1834             ENTER_GL();
1835             for(i=0; i < context->numDirtyEntries; i++) {
1836                 dirtyState = context->dirtyArray[i];
1837                 idx = dirtyState >> 5;
1838                 shift = dirtyState & 0x1f;
1839                 context->isStateDirty[idx] &= ~(1 << shift);
1840                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
1841             }
1842             LEAVE_GL();
1843             context->numDirtyEntries = 0; /* This makes the whole list clean */
1844             context->last_was_blit = FALSE;
1845             break;
1846
1847         case CTXUSAGE_BLIT:
1848             SetupForBlit(This, context,
1849                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
1850                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
1851             break;
1852
1853         default:
1854             FIXME("Unexpected context usage requested\n");
1855     }
1856 }
1857
1858 WineD3DContext *getActiveContext(void) {
1859     return last_device->activeContext;
1860 }