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 void context_bind_fbo(IWineD3DDevice *iface, GLenum target, GLuint *fbo)
  42 {
  43     const IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
  44
  45     if (!*fbo)
  46     {
  47         GL_EXTCALL(glGenFramebuffersEXT(1, fbo));
  48         checkGLcall("glGenFramebuffersEXT()");
  49         TRACE("Created FBO %d\n", *fbo);
  50     }
  51
  52     GL_EXTCALL(glBindFramebufferEXT(target, *fbo));
  53     checkGLcall("glBindFramebuffer()");
  54 }
  55
  56 static void context_destroy_fbo(IWineD3DDeviceImpl *This, const GLuint *fbo)
  57 {
  58     int i = 0;
  59
  60     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, *fbo));
  61     checkGLcall("glBindFramebuffer()");
  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     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
  70     checkGLcall("glBindFramebuffer()");
  71     GL_EXTCALL(glDeleteFramebuffersEXT(1, fbo));
  72     checkGLcall("glDeleteFramebuffers()");
  73 }
  74
  75 static void context_apply_attachment_filter_states(IWineD3DDevice *iface, IWineD3DSurface *surface, BOOL force_preload)
  76 {
  77     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
  78     const IWineD3DSurfaceImpl *surface_impl = (IWineD3DSurfaceImpl *)surface;
  79     IWineD3DBaseTextureImpl *texture_impl;
  80     BOOL update_minfilter = FALSE;
  81     BOOL update_magfilter = FALSE;
  82
  83     /* Update base texture states array */
  84     if (SUCCEEDED(IWineD3DSurface_GetContainer(surface, &IID_IWineD3DBaseTexture, (void **)&texture_impl)))
  85     {
  86         if (texture_impl->baseTexture.states[WINED3DTEXSTA_MINFILTER] != WINED3DTEXF_POINT
  87             || texture_impl->baseTexture.states[WINED3DTEXSTA_MIPFILTER] != WINED3DTEXF_NONE)
  88         {
  89             texture_impl->baseTexture.states[WINED3DTEXSTA_MINFILTER] = WINED3DTEXF_POINT;
  90             texture_impl->baseTexture.states[WINED3DTEXSTA_MIPFILTER] = WINED3DTEXF_NONE;
  91             update_minfilter = TRUE;
  92         }
  93
  94         if (texture_impl->baseTexture.states[WINED3DTEXSTA_MAGFILTER] != WINED3DTEXF_POINT)
  95         {
  96             texture_impl->baseTexture.states[WINED3DTEXSTA_MAGFILTER] = WINED3DTEXF_POINT;
  97             update_magfilter = TRUE;
  98         }
  99
 100         if (texture_impl->baseTexture.bindCount)
 101         {
 102             WARN("Render targets should not be bound to a sampler\n");
 103             IWineD3DDeviceImpl_MarkStateDirty(This, STATE_SAMPLER(texture_impl->baseTexture.sampler));
 104         }
 105
 106         IWineD3DBaseTexture_Release((IWineD3DBaseTexture *)texture_impl);
 107     }
 108
 109     if (update_minfilter || update_magfilter || force_preload)
 110     {
 111         GLenum target, bind_target;
 112         GLint old_binding;
 113
 114         target = surface_impl->glDescription.target;
 115         if (target == GL_TEXTURE_2D)
 116         {
 117             bind_target = GL_TEXTURE_2D;
 118             glGetIntegerv(GL_TEXTURE_BINDING_2D, &old_binding);
 119         } else if (target == GL_TEXTURE_RECTANGLE_ARB) {
 120             bind_target = GL_TEXTURE_RECTANGLE_ARB;
 121             glGetIntegerv(GL_TEXTURE_BINDING_RECTANGLE_ARB, &old_binding);
 122         } else {
 123             bind_target = GL_TEXTURE_CUBE_MAP_ARB;
 124             glGetIntegerv(GL_TEXTURE_BINDING_CUBE_MAP_ARB, &old_binding);
 125         }
 126
 127         IWineD3DSurface_PreLoad(surface);
 128
 129         glBindTexture(bind_target, surface_impl->glDescription.textureName);
 130         if (update_minfilter) glTexParameteri(bind_target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 131         if (update_magfilter) glTexParameteri(bind_target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 132         glBindTexture(bind_target, old_binding);
 133     }
 134
 135     checkGLcall("apply_attachment_filter_states()");
 136 }
 137
 138 /* TODO: Handle stencil attachments */
 139 void context_attach_depth_stencil_fbo(IWineD3DDeviceImpl *This, GLenum fbo_target, IWineD3DSurface *depth_stencil, BOOL use_render_buffer)
 140 {
 141     IWineD3DSurfaceImpl *depth_stencil_impl = (IWineD3DSurfaceImpl *)depth_stencil;
 142
 143     TRACE("Attach depth stencil %p\n", depth_stencil);
 144
 145     if (depth_stencil)
 146     {
 147         if (use_render_buffer && depth_stencil_impl->current_renderbuffer)
 148         {
 149             GL_EXTCALL(glFramebufferRenderbufferEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, depth_stencil_impl->current_renderbuffer->id));
 150             checkGLcall("glFramebufferRenderbufferEXT()");
 151         } else {
 152             context_apply_attachment_filter_states((IWineD3DDevice *)This, depth_stencil, TRUE);
 153
 154             GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT, depth_stencil_impl->glDescription.target,
 155                         depth_stencil_impl->glDescription.textureName, depth_stencil_impl->glDescription.level));
 156             checkGLcall("glFramebufferTexture2DEXT()");
 157         }
 158     } else {
 159         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, 0, 0));
 160         checkGLcall("glFramebufferTexture2DEXT()");
 161     }
 162 }
 163
 164 void context_attach_surface_fbo(IWineD3DDeviceImpl *This, GLenum fbo_target, DWORD idx, IWineD3DSurface *surface)
 165 {
 166     const IWineD3DSurfaceImpl *surface_impl = (IWineD3DSurfaceImpl *)surface;
 167
 168     TRACE("Attach surface %p to %u\n", surface, idx);
 169
 170     if (surface)
 171     {
 172         context_apply_attachment_filter_states((IWineD3DDevice *)This, surface, TRUE);
 173
 174         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_COLOR_ATTACHMENT0_EXT + idx, surface_impl->glDescription.target,
 175                 surface_impl->glDescription.textureName, surface_impl->glDescription.level));
 176         checkGLcall("glFramebufferTexture2DEXT()");
 177     } else {
 178         GL_EXTCALL(glFramebufferTexture2DEXT(fbo_target, GL_COLOR_ATTACHMENT0_EXT + idx, GL_TEXTURE_2D, 0, 0));
 179         checkGLcall("glFramebufferTexture2DEXT()");
 180     }
 181 }
 182
 183 static void context_check_fbo_status(IWineD3DDevice *iface)
 184 {
 185     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 186     GLenum status;
 187
 188     status = GL_EXTCALL(glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT));
 189     if (status == GL_FRAMEBUFFER_COMPLETE_EXT)
 190     {
 191         TRACE("FBO complete\n");
 192     } else {
 193         IWineD3DSurfaceImpl *attachment;
 194         unsigned int i;
 195         FIXME("FBO status %s (%#x)\n", debug_fbostatus(status), status);
 196
 197         /* Dump the FBO attachments */
 198         for (i = 0; i < GL_LIMITS(buffers); ++i)
 199         {
 200             attachment = (IWineD3DSurfaceImpl *)This->activeContext->current_fbo->render_targets[i];
 201             if (attachment)
 202             {
 203                 FIXME("\tColor attachment %d: (%p) %s %ux%u\n", i, attachment, debug_d3dformat(attachment->resource.format),
 204                         attachment->pow2Width, attachment->pow2Height);
 205             }
 206         }
 207         attachment = (IWineD3DSurfaceImpl *)This->activeContext->current_fbo->depth_stencil;
 208         if (attachment)
 209         {
 210             FIXME("\tDepth attachment: (%p) %s %ux%u\n", attachment, debug_d3dformat(attachment->resource.format),
 211                     attachment->pow2Width, attachment->pow2Height);
 212         }
 213     }
 214 }
 215
 216 static struct fbo_entry *context_create_fbo_entry(IWineD3DDevice *iface)
 217 {
 218     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 219     struct fbo_entry *entry;
 220
 221     entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
 222     entry->render_targets = HeapAlloc(GetProcessHeap(), 0, GL_LIMITS(buffers) * sizeof(*entry->render_targets));
 223     memcpy(entry->render_targets, This->render_targets, GL_LIMITS(buffers) * sizeof(*entry->render_targets));
 224     entry->depth_stencil = This->stencilBufferTarget;
 225     entry->attached = FALSE;
 226     entry->id = 0;
 227
 228     return entry;
 229 }
 230
 231 static void context_destroy_fbo_entry(IWineD3DDeviceImpl *This, struct fbo_entry *entry)
 232 {
 233     if (entry->id)
 234     {
 235         TRACE("Destroy FBO %d\n", entry->id);
 236         context_destroy_fbo(This, &entry->id);
 237     }
 238     list_remove(&entry->entry);
 239     HeapFree(GetProcessHeap(), 0, entry->render_targets);
 240     HeapFree(GetProcessHeap(), 0, entry);
 241 }
 242
 243
 244 static struct fbo_entry *context_find_fbo_entry(IWineD3DDevice *iface, WineD3DContext *context)
 245 {
 246     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 247     struct fbo_entry *entry;
 248
 249     LIST_FOR_EACH_ENTRY(entry, &context->fbo_list, struct fbo_entry, entry)
 250     {
 251         if (!memcmp(entry->render_targets, This->render_targets, GL_LIMITS(buffers) * sizeof(*entry->render_targets))
 252                 && entry->depth_stencil == This->stencilBufferTarget)
 253         {
 254             return entry;
 255         }
 256     }
 257
 258     entry = context_create_fbo_entry(iface);
 259     list_add_head(&context->fbo_list, &entry->entry);
 260     return entry;
 261 }
 262
 263 static void context_apply_fbo_entry(IWineD3DDevice *iface, struct fbo_entry *entry)
 264 {
 265     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 266     unsigned int i;
 267
 268     context_bind_fbo(iface, GL_FRAMEBUFFER_EXT, &entry->id);
 269
 270     if (!entry->attached)
 271     {
 272         /* Apply render targets */
 273         for (i = 0; i < GL_LIMITS(buffers); ++i)
 274         {
 275             IWineD3DSurface *render_target = This->render_targets[i];
 276             context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, i, render_target);
 277         }
 278
 279         /* Apply depth targets */
 280         if (This->stencilBufferTarget) {
 281             unsigned int w = ((IWineD3DSurfaceImpl *)This->render_targets[0])->pow2Width;
 282             unsigned int h = ((IWineD3DSurfaceImpl *)This->render_targets[0])->pow2Height;
 283
 284             surface_set_compatible_renderbuffer(This->stencilBufferTarget, w, h);
 285         }
 286         context_attach_depth_stencil_fbo(This, GL_FRAMEBUFFER_EXT, This->stencilBufferTarget, TRUE);
 287
 288         entry->attached = TRUE;
 289     } else {
 290         for (i = 0; i < GL_LIMITS(buffers); ++i)
 291         {
 292             if (This->render_targets[i])
 293                 context_apply_attachment_filter_states(iface, This->render_targets[i], FALSE);
 294         }
 295         if (This->stencilBufferTarget)
 296             context_apply_attachment_filter_states(iface, This->stencilBufferTarget, FALSE);
 297     }
 298
 299     for (i = 0; i < GL_LIMITS(buffers); ++i)
 300     {
 301         if (This->render_targets[i])
 302             This->draw_buffers[i] = GL_COLOR_ATTACHMENT0_EXT + i;
 303         else
 304             This->draw_buffers[i] = GL_NONE;
 305     }
 306 }
 307
 308 static void context_apply_fbo_state(IWineD3DDevice *iface)
 309 {
 310     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 311     WineD3DContext *context = This->activeContext;
 312
 313     if (This->render_offscreen)
 314     {
 315         context->current_fbo = context_find_fbo_entry(iface, context);
 316         context_apply_fbo_entry(iface, context->current_fbo);
 317     } else {
 318         context->current_fbo = NULL;
 319         GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
 320     }
 321
 322     context_check_fbo_status(iface);
 323 }
 324
 325 void context_resource_released(IWineD3DDevice *iface, IWineD3DResource *resource, WINED3DRESOURCETYPE type)
 326 {
 327     IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
 328     UINT i;
 329
 330     switch(type)
 331     {
 332         case WINED3DRTYPE_SURFACE:
 333         {
 334             for (i = 0; i < This->numContexts; ++i)
 335             {
 336                 struct fbo_entry *entry, *entry2;
 337
 338                 LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &This->contexts[i]->fbo_list, struct fbo_entry, entry)
 339                 {
 340                     BOOL destroyed = FALSE;
 341                     UINT j;
 342
 343                     for (j = 0; !destroyed && j < GL_LIMITS(buffers); ++j)
 344                     {
 345                         if (entry->render_targets[j] == (IWineD3DSurface *)resource)
 346                         {
 347                             context_destroy_fbo_entry(This, entry);
 348                             destroyed = TRUE;
 349                         }
 350                     }
 351
 352                     if (!destroyed && entry->depth_stencil == (IWineD3DSurface *)resource)
 353                         context_destroy_fbo_entry(This, entry);
 354                 }
 355             }
 356
 357             break;
 358         }
 359
 360         default:
 361             break;
 362     }
 363 }
 364
 365 /*****************************************************************************
 366  * Context_MarkStateDirty
 367  *
 368  * Marks a state in a context dirty. Only one context, opposed to
 369  * IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
 370  * contexts
 371  *
 372  * Params:
 373  *  context: Context to mark the state dirty in
 374  *  state: State to mark dirty
 375  *  StateTable: Pointer to the state table in use(for state grouping)
 376  *
 377  *****************************************************************************/
 378 static void Context_MarkStateDirty(WineD3DContext *context, DWORD state, const struct StateEntry *StateTable) {
 379     DWORD rep = StateTable[state].representative;
 380     DWORD idx;
 381     BYTE shift;
 382
 383     if(!rep || isStateDirty(context, rep)) return;
 384
 385     context->dirtyArray[context->numDirtyEntries++] = rep;
 386     idx = rep >> 5;
 387     shift = rep & 0x1f;
 388     context->isStateDirty[idx] |= (1 << shift);
 389 }
 390
 391 /*****************************************************************************
 392  * AddContextToArray
 393  *
 394  * Adds a context to the context array. Helper function for CreateContext
 395  *
 396  * This method is not called in performance-critical code paths, only when a
 397  * new render target or swapchain is created. Thus performance is not an issue
 398  * here.
 399  *
 400  * Params:
 401  *  This: Device to add the context for
 402  *  hdc: device context
 403  *  glCtx: WGL context to add
 404  *  pbuffer: optional pbuffer used with this context
 405  *
 406  *****************************************************************************/
 407 static WineD3DContext *AddContextToArray(IWineD3DDeviceImpl *This, HWND win_handle, HDC hdc, HGLRC glCtx, HPBUFFERARB pbuffer) {
 408     WineD3DContext **oldArray = This->contexts;
 409     DWORD state;
 410
 411     This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * (This->numContexts + 1));
 412     if(This->contexts == NULL) {
 413         ERR("Unable to grow the context array\n");
 414         This->contexts = oldArray;
 415         return NULL;
 416     }
 417     if(oldArray) {
 418         memcpy(This->contexts, oldArray, sizeof(*This->contexts) * This->numContexts);
 419     }
 420
 421     This->contexts[This->numContexts] = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WineD3DContext));
 422     if(This->contexts[This->numContexts] == NULL) {
 423         ERR("Unable to allocate a new context\n");
 424         HeapFree(GetProcessHeap(), 0, This->contexts);
 425         This->contexts = oldArray;
 426         return NULL;
 427     }
 428
 429     This->contexts[This->numContexts]->hdc = hdc;
 430     This->contexts[This->numContexts]->glCtx = glCtx;
 431     This->contexts[This->numContexts]->pbuffer = pbuffer;
 432     This->contexts[This->numContexts]->win_handle = win_handle;
 433     HeapFree(GetProcessHeap(), 0, oldArray);
 434
 435     /* Mark all states dirty to force a proper initialization of the states on the first use of the context
 436      */
 437     for(state = 0; state <= STATE_HIGHEST; state++) {
 438         Context_MarkStateDirty(This->contexts[This->numContexts], state, This->StateTable);
 439     }
 440
 441     This->numContexts++;
 442     TRACE("Created context %p\n", This->contexts[This->numContexts - 1]);
 443     return This->contexts[This->numContexts - 1];
 444 }
 445
 446 /* This function takes care of WineD3D pixel format selection. */
 447 static int WineD3D_ChoosePixelFormat(IWineD3DDeviceImpl *This, HDC hdc, WINED3DFORMAT ColorFormat, WINED3DFORMAT DepthStencilFormat, BOOL auxBuffers, int numSamples, BOOL pbuffer, BOOL findCompatible)
 448 {
 449     int iPixelFormat=0;
 450     unsigned int matchtry;
 451     short redBits, greenBits, blueBits, alphaBits, colorBits;
 452     short depthBits=0, stencilBits=0;
 453
 454     struct match_type {
 455         BOOL require_aux;
 456         BOOL exact_alpha;
 457         BOOL exact_color;
 458     } matches[] = {
 459         /* First, try without alpha match buffers. MacOS supports aux buffers only
 460          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
 461          * Then try without aux buffers - this is the most common cause for not
 462          * finding a pixel format. Also some drivers(the open source ones)
 463          * only offer 32 bit ARB pixel formats. First try without an exact alpha
 464          * match, then try without an exact alpha and color match.
 465          */
 466         { TRUE,  TRUE,  TRUE  },
 467         { TRUE,  FALSE, TRUE  },
 468         { FALSE, TRUE,  TRUE  },
 469         { FALSE, FALSE, TRUE  },
 470         { TRUE,  FALSE, FALSE },
 471         { FALSE, FALSE, FALSE },
 472     };
 473
 474     int i = 0;
 475     int nCfgs = This->adapter->nCfgs;
 476
 477     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, pbuffer=%d, findCompatible=%d\n",
 478           debug_d3dformat(ColorFormat), debug_d3dformat(DepthStencilFormat), auxBuffers, numSamples, pbuffer, findCompatible);
 479
 480     if(!getColorBits(ColorFormat, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
 481         ERR("Unable to get color bits for format %s (%#x)!\n", debug_d3dformat(ColorFormat), ColorFormat);
 482         return 0;
 483     }
 484
 485     /* In WGL both color, depth and stencil are features of a pixel format. In case of D3D they are separate.
 486      * You are able to add a depth + stencil surface at a later stage when you need it.
 487      * In order to support this properly in WineD3D we need the ability to recreate the opengl context and
 488      * drawable when this is required. This is very tricky as we need to reapply ALL opengl states for the new
 489      * context, need torecreate shaders, textures and other resources.
 490      *
 491      * The context manager already takes care of the state problem and for the other tasks code from Reset
 492      * can be used. These changes are way to risky during the 1.0 code freeze which is taking place right now.
 493      * Likely a lot of other new bugs will be exposed. For that reason request a depth stencil surface all the
 494      * time. It can cause a slight performance hit but fixes a lot of regressions. A fixme reminds of that this
 495      * issue needs to be fixed. */
 496     if(DepthStencilFormat != WINED3DFMT_D24S8)
 497         FIXME("Add OpenGL context recreation support to SetDepthStencilSurface\n");
 498
 499     DepthStencilFormat = WINED3DFMT_D24S8;
 500
 501     if(DepthStencilFormat) {
 502         getDepthStencilBits(DepthStencilFormat, &depthBits, &stencilBits);
 503     }
 504
 505     for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
 506         for(i=0; i<nCfgs; i++) {
 507             BOOL exactDepthMatch = TRUE;
 508             WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
 509
 510             /* For now only accept RGBA formats. Perhaps some day we will
 511              * allow floating point formats for pbuffers. */
 512             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
 513                 continue;
 514
 515             /* In window mode (!pbuffer) we need a window drawable format and double buffering. */
 516             if(!pbuffer && !(cfg->windowDrawable && cfg->doubleBuffer))
 517                 continue;
 518
 519             /* We like to have aux buffers in backbuffer mode */
 520             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
 521                 continue;
 522
 523             /* In pbuffer-mode we need a pbuffer-capable format but we don't want double buffering */
 524             if(pbuffer && (!cfg->pbufferDrawable || cfg->doubleBuffer))
 525                 continue;
 526
 527             if(matches[matchtry].exact_color) {
 528                 if(cfg->redSize != redBits)
 529                     continue;
 530                 if(cfg->greenSize != greenBits)
 531                     continue;
 532                 if(cfg->blueSize != blueBits)
 533                     continue;
 534             } else {
 535                 if(cfg->redSize < redBits)
 536                     continue;
 537                 if(cfg->greenSize < greenBits)
 538                     continue;
 539                 if(cfg->blueSize < blueBits)
 540                     continue;
 541             }
 542             if(matches[matchtry].exact_alpha) {
 543                 if(cfg->alphaSize != alphaBits)
 544                     continue;
 545             } else {
 546                 if(cfg->alphaSize < alphaBits)
 547                     continue;
 548             }
 549
 550             /* We try to locate a format which matches our requirements exactly. In case of
 551              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
 552             if(cfg->depthSize < depthBits)
 553                 continue;
 554             else if(cfg->depthSize > depthBits)
 555                 exactDepthMatch = FALSE;
 556
 557             /* In all cases make sure the number of stencil bits matches our requirements
 558              * even when we don't need stencil because it could affect performance EXCEPT
 559              * on cards which don't offer depth formats without stencil like the i915 drivers
 560              * on Linux. */
 561             if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
 562                 continue;
 563
 564             /* Check multisampling support */
 565             if(cfg->numSamples != numSamples)
 566                 continue;
 567
 568             /* When we have passed all the checks then we have found a format which matches our
 569              * requirements. Note that we only check for a limit number of capabilities right now,
 570              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
 571              * can still differ in things like multisampling, stereo, SRGB and other flags.
 572              */
 573
 574             /* Exit the loop as we have found a format :) */
 575             if(exactDepthMatch) {
 576                 iPixelFormat = cfg->iPixelFormat;
 577                 break;
 578             } else if(!iPixelFormat) {
 579                 /* In the end we might end up with a format which doesn't exactly match our depth
 580                  * requirements. Accept the first format we found because formats with higher iPixelFormat
 581                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
 582                 iPixelFormat = cfg->iPixelFormat;
 583             }
 584         }
 585     }
 586
 587     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
 588     if(!iPixelFormat && !findCompatible) {
 589         ERR("Can't find a suitable iPixelFormat\n");
 590         return FALSE;
 591     } else if(!iPixelFormat) {
 592         PIXELFORMATDESCRIPTOR pfd;
 593
 594         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
 595         /* PixelFormat selection */
 596         ZeroMemory(&pfd, sizeof(pfd));
 597         pfd.nSize      = sizeof(pfd);
 598         pfd.nVersion   = 1;
 599         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 600         pfd.iPixelType = PFD_TYPE_RGBA;
 601         pfd.cAlphaBits = alphaBits;
 602         pfd.cColorBits = colorBits;
 603         pfd.cDepthBits = depthBits;
 604         pfd.cStencilBits = stencilBits;
 605         pfd.iLayerType = PFD_MAIN_PLANE;
 606
 607         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 608         if(!iPixelFormat) {
 609             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 610             ERR("Can't find a suitable iPixelFormat\n");
 611             return FALSE;
 612         }
 613     }
 614
 615     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n", iPixelFormat, debug_d3dformat(ColorFormat), debug_d3dformat(DepthStencilFormat));
 616     return iPixelFormat;
 617 }
 618
 619 /*****************************************************************************
 620  * CreateContext
 621  *
 622  * Creates a new context for a window, or a pbuffer context.
 623  *
 624  * * Params:
 625  *  This: Device to activate the context for
 626  *  target: Surface this context will render to
 627  *  win_handle: handle to the window which we are drawing to
 628  *  create_pbuffer: tells whether to create a pbuffer or not
 629  *  pPresentParameters: contains the pixelformats to use for onscreen rendering
 630  *
 631  *****************************************************************************/
 632 WineD3DContext *CreateContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target, HWND win_handle, BOOL create_pbuffer, const WINED3DPRESENT_PARAMETERS *pPresentParms) {
 633     HDC oldDrawable, hdc;
 634     HPBUFFERARB pbuffer = NULL;
 635     HGLRC ctx = NULL, oldCtx;
 636     WineD3DContext *ret = NULL;
 637     int s;
 638
 639     TRACE("(%p): Creating a %s context for render target %p\n", This, create_pbuffer ? "offscreen" : "onscreen", target);
 640
 641     if(create_pbuffer) {
 642         HDC hdc_parent = GetDC(win_handle);
 643         int iPixelFormat = 0;
 644
 645         IWineD3DSurface *StencilSurface = This->stencilBufferTarget;
 646         WINED3DFORMAT StencilBufferFormat = (NULL != StencilSurface) ? ((IWineD3DSurfaceImpl *) StencilSurface)->resource.format : 0;
 647
 648         /* Try to find a pixel format with pbuffer support. */
 649         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format, StencilBufferFormat, FALSE /* auxBuffers */, 0 /* numSamples */, TRUE /* PBUFFER */, FALSE /* findCompatible */);
 650         if(!iPixelFormat) {
 651             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 652
 653             /* For some reason we weren't able to find a format, try to find something instead of crashing.
 654              * A reason for failure could have been wglChoosePixelFormatARB strictness. */
 655             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format, StencilBufferFormat, FALSE /* auxBuffer */, 0 /* numSamples */, TRUE /* PBUFFER */, TRUE /* findCompatible */);
 656         }
 657
 658         /* This shouldn't happen as ChoosePixelFormat always returns something */
 659         if(!iPixelFormat) {
 660             ERR("Unable to locate a pixel format for a pbuffer\n");
 661             ReleaseDC(win_handle, hdc_parent);
 662             goto out;
 663         }
 664
 665         TRACE("Creating a pBuffer drawable for the new context\n");
 666         pbuffer = GL_EXTCALL(wglCreatePbufferARB(hdc_parent, iPixelFormat, target->currentDesc.Width, target->currentDesc.Height, 0));
 667         if(!pbuffer) {
 668             ERR("Cannot create a pbuffer\n");
 669             ReleaseDC(win_handle, hdc_parent);
 670             goto out;
 671         }
 672
 673         /* In WGL a pbuffer is 'wrapped' inside a HDC to 'fool' wglMakeCurrent */
 674         hdc = GL_EXTCALL(wglGetPbufferDCARB(pbuffer));
 675         if(!hdc) {
 676             ERR("Cannot get a HDC for pbuffer (%p)\n", pbuffer);
 677             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 678             ReleaseDC(win_handle, hdc_parent);
 679             goto out;
 680         }
 681         ReleaseDC(win_handle, hdc_parent);
 682     } else {
 683         PIXELFORMATDESCRIPTOR pfd;
 684         int iPixelFormat;
 685         int res;
 686         WINED3DFORMAT ColorFormat = target->resource.format;
 687         WINED3DFORMAT DepthStencilFormat = 0;
 688         BOOL auxBuffers = FALSE;
 689         int numSamples = 0;
 690
 691         hdc = GetDC(win_handle);
 692         if(hdc == NULL) {
 693             ERR("Cannot retrieve a device context!\n");
 694             goto out;
 695         }
 696
 697         /* In case of ORM_BACKBUFFER, make sure to request an alpha component for X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
 698         if(wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 699             auxBuffers = TRUE;
 700
 701             if(target->resource.format == WINED3DFMT_X4R4G4B4)
 702                 ColorFormat = WINED3DFMT_A4R4G4B4;
 703             else if(target->resource.format == WINED3DFMT_X8R8G8B8)
 704                 ColorFormat = WINED3DFMT_A8R8G8B8;
 705         }
 706
 707         /* DirectDraw supports 8bit paletted render targets and these are used by old games like Starcraft and C&C.
 708          * Most modern hardware doesn't support 8bit natively so we perform some form of 8bit -> 32bit conversion.
 709          * The conversion (ab)uses the alpha component for storing the palette index. For this reason we require
 710          * a format with 8bit alpha, so request A8R8G8B8. */
 711         if(ColorFormat == WINED3DFMT_P8)
 712             ColorFormat = WINED3DFMT_A8R8G8B8;
 713
 714         /* Retrieve the depth stencil format from the present parameters.
 715          * The choice of the proper format can give a nice performance boost
 716          * in case of GPU limited programs. */
 717         if(pPresentParms->EnableAutoDepthStencil) {
 718             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 719             DepthStencilFormat = pPresentParms->AutoDepthStencilFormat;
 720         }
 721
 722         /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD */
 723         if(pPresentParms->MultiSampleType && (pPresentParms->SwapEffect == WINED3DSWAPEFFECT_DISCARD)) {
 724             if(!GL_SUPPORT(ARB_MULTISAMPLE))
 725                 ERR("The program is requesting multisampling without support!\n");
 726             else {
 727                 ERR("Requesting MultiSampleType=%d\n", pPresentParms->MultiSampleType);
 728                 numSamples = pPresentParms->MultiSampleType;
 729             }
 730         }
 731
 732         /* Try to find a pixel format which matches our requirements */
 733         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, ColorFormat, DepthStencilFormat, auxBuffers, numSamples, FALSE /* PBUFFER */, FALSE /* findCompatible */);
 734
 735         /* Try to locate a compatible format if we weren't able to find anything */
 736         if(!iPixelFormat) {
 737             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 738             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, ColorFormat, DepthStencilFormat, auxBuffers, 0 /* numSamples */, FALSE /* PBUFFER */, TRUE /* findCompatible */ );
 739         }
 740
 741         /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
 742         if(!iPixelFormat) {
 743             ERR("Can't find a suitable iPixelFormat\n");
 744             return FALSE;
 745         }
 746
 747         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 748         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 749         if(!res) {
 750             int oldPixelFormat = GetPixelFormat(hdc);
 751
 752             /* By default WGL doesn't allow pixel format adjustments but we need it here.
 753              * For this reason there is a WINE-specific wglSetPixelFormat which allows you to
 754              * set the pixel format multiple times. Only use it when it is really needed. */
 755
 756             if(oldPixelFormat == iPixelFormat) {
 757                 /* We don't have to do anything as the formats are the same :) */
 758             } else if(oldPixelFormat && GL_SUPPORT(WGL_WINE_PIXEL_FORMAT_PASSTHROUGH)) {
 759                 res = GL_EXTCALL(wglSetPixelFormatWINE(hdc, iPixelFormat, NULL));
 760
 761                 if(!res) {
 762                     ERR("wglSetPixelFormatWINE failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 763                     return FALSE;
 764                 }
 765             } else if(oldPixelFormat) {
 766                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 767                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 768                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 769             } else {
 770                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 771                 return FALSE;
 772             }
 773         }
 774     }
 775
 776     ctx = pwglCreateContext(hdc);
 777     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 778
 779     if(!ctx) {
 780         ERR("Failed to create a WGL context\n");
 781         if(create_pbuffer) {
 782             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 783             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 784         }
 785         goto out;
 786     }
 787     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 788     if(!ret) {
 789         ERR("Failed to add the newly created context to the context list\n");
 790         pwglDeleteContext(ctx);
 791         if(create_pbuffer) {
 792             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 793             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 794         }
 795         goto out;
 796     }
 797     ret->surface = (IWineD3DSurface *) target;
 798     ret->isPBuffer = create_pbuffer;
 799     ret->tid = GetCurrentThreadId();
 800     if(This->shader_backend->shader_dirtifyable_constants((IWineD3DDevice *) This)) {
 801         /* Create the dirty constants array and initialize them to dirty */
 802         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 803                 sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 804         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 805                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 806         memset(ret->vshader_const_dirty, 1,
 807                sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 808         memset(ret->pshader_const_dirty, 1,
 809                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 810     }
 811
 812     TRACE("Successfully created new context %p\n", ret);
 813
 814     list_init(&ret->fbo_list);
 815
 816     /* Set up the context defaults */
 817     oldCtx  = pwglGetCurrentContext();
 818     oldDrawable = pwglGetCurrentDC();
 819     if(oldCtx && oldDrawable) {
 820         /* See comment in ActivateContext context switching */
 821         This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
 822     }
 823     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 824         ERR("Cannot activate context to set up defaults\n");
 825         goto out;
 826     }
 827
 828     ENTER_GL();
 829
 830     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
 831
 832     TRACE("Setting up the screen\n");
 833     /* Clear the screen */
 834     glClearColor(1.0, 0.0, 0.0, 0.0);
 835     checkGLcall("glClearColor");
 836     glClearIndex(0);
 837     glClearDepth(1);
 838     glClearStencil(0xffff);
 839
 840     checkGLcall("glClear");
 841
 842     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 843     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 844
 845     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 846     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 847
 848     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 849     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 850
 851     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 852     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 853     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 854     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 855
 856     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 857         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 858          * and textures in DIB sections(due to the memory protection).
 859          */
 860         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 861         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 862     }
 863     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 864         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 865          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 866          * GL_VERTEX_BLEND_ARB isn't enabled too
 867          */
 868         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 869         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 870     }
 871     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 872         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 873          * the previous texture where to source the offset from is always unit - 1.
 874          */
 875         for(s = 1; s < GL_LIMITS(textures); s++) {
 876             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 877             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 878             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 879         }
 880     }
 881
 882     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 883         for(s = 0; s < GL_LIMITS(textures); s++) {
 884             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 885             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 886             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 887         }
 888     }
 889     LEAVE_GL();
 890
 891     /* Never keep GL_FRAGMENT_SHADER_ATI enabled on a context that we switch away from,
 892      * but enable it for the first context we create, and reenable it on the old context
 893      */
 894     if(oldDrawable && oldCtx) {
 895         pwglMakeCurrent(oldDrawable, oldCtx);
 896     } else {
 897         last_device = This;
 898     }
 899     This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
 900
 901     return ret;
 902
 903 out:
 904     return NULL;
 905 }
 906
 907 /*****************************************************************************
 908  * RemoveContextFromArray
 909  *
 910  * Removes a context from the context manager. The opengl context is not
 911  * destroyed or unset. context is not a valid pointer after that call.
 912  *
 913  * Similar to the former call this isn't a performance critical function. A
 914  * helper function for DestroyContext.
 915  *
 916  * Params:
 917  *  This: Device to activate the context for
 918  *  context: Context to remove
 919  *
 920  *****************************************************************************/
 921 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 922     UINT t, s;
 923     WineD3DContext **oldArray = This->contexts;
 924
 925     TRACE("Removing ctx %p\n", context);
 926
 927     This->numContexts--;
 928
 929     if(This->numContexts) {
 930         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 931         if(!This->contexts) {
 932             ERR("Cannot allocate a new context array, PANIC!!!\n");
 933         }
 934         t = 0;
 935         /* Note that we decreased numContexts a few lines up, so use '<=' instead of '<' */
 936         for(s = 0; s <= This->numContexts; s++) {
 937             if(oldArray[s] == context) continue;
 938             This->contexts[t] = oldArray[s];
 939             t++;
 940         }
 941     } else {
 942         This->contexts = NULL;
 943     }
 944
 945     HeapFree(GetProcessHeap(), 0, context);
 946     HeapFree(GetProcessHeap(), 0, oldArray);
 947 }
 948
 949 /*****************************************************************************
 950  * DestroyContext
 951  *
 952  * Destroys a wineD3DContext
 953  *
 954  * Params:
 955  *  This: Device to activate the context for
 956  *  context: Context to destroy
 957  *
 958  *****************************************************************************/
 959 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 960     struct fbo_entry *entry, *entry2;
 961
 962     TRACE("Destroying ctx %p\n", context);
 963
 964     /* The correct GL context needs to be active to cleanup the GL resources below */
 965     if(pwglGetCurrentContext() != context->glCtx){
 966         pwglMakeCurrent(context->hdc, context->glCtx);
 967         last_device = NULL;
 968     }
 969
 970     ENTER_GL();
 971
 972     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry) {
 973         context_destroy_fbo_entry(This, entry);
 974     }
 975     if (context->src_fbo) {
 976         TRACE("Destroy src FBO %d\n", context->src_fbo);
 977         context_destroy_fbo(This, &context->src_fbo);
 978     }
 979     if (context->dst_fbo) {
 980         TRACE("Destroy dst FBO %d\n", context->dst_fbo);
 981         context_destroy_fbo(This, &context->dst_fbo);
 982     }
 983
 984     LEAVE_GL();
 985
 986     /* Cleanup the GL context */
 987     pwglMakeCurrent(NULL, NULL);
 988     if(context->isPBuffer) {
 989         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 990         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 991     } else ReleaseDC(context->win_handle, context->hdc);
 992     pwglDeleteContext(context->glCtx);
 993
 994     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
 995     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
 996     RemoveContextFromArray(This, context);
 997 }
 998
 999 static inline void set_blit_dimension(UINT width, UINT height) {
1000     glMatrixMode(GL_PROJECTION);
1001     checkGLcall("glMatrixMode(GL_PROJECTION)");
1002     glLoadIdentity();
1003     checkGLcall("glLoadIdentity()");
1004     glOrtho(0, width, height, 0, 0.0, -1.0);
1005     checkGLcall("glOrtho");
1006     glViewport(0, 0, width, height);
1007     checkGLcall("glViewport");
1008 }
1009
1010 /*****************************************************************************
1011  * SetupForBlit
1012  *
1013  * Sets up a context for DirectDraw blitting.
1014  * All texture units are disabled, texture unit 0 is set as current unit
1015  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1016  * color writing enabled for all channels
1017  * register combiners disabled, shaders disabled
1018  * world matrix is set to identity, texture matrix 0 too
1019  * projection matrix is setup for drawing screen coordinates
1020  *
1021  * Params:
1022  *  This: Device to activate the context for
1023  *  context: Context to setup
1024  *  width: render target width
1025  *  height: render target height
1026  *
1027  *****************************************************************************/
1028 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
1029     int i, sampler;
1030     const struct StateEntry *StateTable = This->StateTable;
1031
1032     TRACE("Setting up context %p for blitting\n", context);
1033     if(context->last_was_blit) {
1034         if(context->blit_w != width || context->blit_h != height) {
1035             set_blit_dimension(width, height);
1036             context->blit_w = width; context->blit_h = height;
1037             /* No need to dirtify here, the states are still dirtified because they weren't
1038              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1039              * be set
1040              */
1041         }
1042         TRACE("Context is already set up for blitting, nothing to do\n");
1043         return;
1044     }
1045     context->last_was_blit = TRUE;
1046
1047     /* TODO: Use a display list */
1048
1049     /* Disable shaders */
1050     This->shader_backend->shader_select((IWineD3DDevice *)This, FALSE, FALSE);
1051     Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1052     Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1053
1054     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1055      * helper functions in between gl calls. This function is full of Context_MarkStateDirty
1056      * which can safely be called from here, we only lock once instead locking/unlocking
1057      * after each GL call.
1058      */
1059     ENTER_GL();
1060
1061     /* Disable all textures. The caller can then bind a texture it wants to blit
1062      * from
1063      *
1064      * The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1065      * function texture unit. No need to care for higher samplers
1066      */
1067     for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
1068         sampler = This->rev_tex_unit_map[i];
1069         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1070         checkGLcall("glActiveTextureARB");
1071
1072         if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1073             glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1074             checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1075         }
1076         glDisable(GL_TEXTURE_3D);
1077         checkGLcall("glDisable GL_TEXTURE_3D");
1078         if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1079             glDisable(GL_TEXTURE_RECTANGLE_ARB);
1080             checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1081         }
1082         glDisable(GL_TEXTURE_2D);
1083         checkGLcall("glDisable GL_TEXTURE_2D");
1084
1085         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1086         checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1087
1088         if (sampler != -1) {
1089             if (sampler < MAX_TEXTURES) {
1090                 Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1091             }
1092             Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1093         }
1094     }
1095     GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1096     checkGLcall("glActiveTextureARB");
1097
1098     sampler = This->rev_tex_unit_map[0];
1099
1100     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1101         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1102         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1103     }
1104     glDisable(GL_TEXTURE_3D);
1105     checkGLcall("glDisable GL_TEXTURE_3D");
1106     if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1107         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1108         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1109     }
1110     glDisable(GL_TEXTURE_2D);
1111     checkGLcall("glDisable GL_TEXTURE_2D");
1112
1113     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1114
1115     glMatrixMode(GL_TEXTURE);
1116     checkGLcall("glMatrixMode(GL_TEXTURE)");
1117     glLoadIdentity();
1118     checkGLcall("glLoadIdentity()");
1119
1120     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
1121         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1122                   GL_TEXTURE_LOD_BIAS_EXT,
1123                   0.0);
1124         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
1125     }
1126
1127     if (sampler != -1) {
1128         if (sampler < MAX_TEXTURES) {
1129             Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1130             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1131         }
1132         Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1133     }
1134
1135     /* Other misc states */
1136     glDisable(GL_ALPHA_TEST);
1137     checkGLcall("glDisable(GL_ALPHA_TEST)");
1138     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1139     glDisable(GL_LIGHTING);
1140     checkGLcall("glDisable GL_LIGHTING");
1141     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1142     glDisable(GL_DEPTH_TEST);
1143     checkGLcall("glDisable GL_DEPTH_TEST");
1144     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1145     glDisable(GL_FOG);
1146     checkGLcall("glDisable GL_FOG");
1147     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1148     glDisable(GL_BLEND);
1149     checkGLcall("glDisable GL_BLEND");
1150     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1151     glDisable(GL_CULL_FACE);
1152     checkGLcall("glDisable GL_CULL_FACE");
1153     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1154     glDisable(GL_STENCIL_TEST);
1155     checkGLcall("glDisable GL_STENCIL_TEST");
1156     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1157     glDisable(GL_SCISSOR_TEST);
1158     checkGLcall("glDisable GL_SCISSOR_TEST");
1159     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1160     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
1161         glDisable(GL_POINT_SPRITE_ARB);
1162         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1163         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1164     }
1165     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1166     checkGLcall("glColorMask");
1167     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1168     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
1169         glDisable(GL_COLOR_SUM_EXT);
1170         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1171         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1172     }
1173
1174     /* Setup transforms */
1175     glMatrixMode(GL_MODELVIEW);
1176     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1177     glLoadIdentity();
1178     checkGLcall("glLoadIdentity()");
1179     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1180
1181     context->last_was_rhw = TRUE;
1182     Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1183
1184     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1185     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1186     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1187     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1188     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1189     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1190     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1191     LEAVE_GL();
1192
1193     set_blit_dimension(width, height);
1194     context->blit_w = width; context->blit_h = height;
1195     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1196     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1197
1198
1199     This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1200 }
1201
1202 /*****************************************************************************
1203  * findThreadContextForSwapChain
1204  *
1205  * Searches a swapchain for all contexts and picks one for the thread tid.
1206  * If none can be found the swapchain is requested to create a new context
1207  *
1208  *****************************************************************************/
1209 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
1210     unsigned int i;
1211
1212     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1213         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1214             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1215         }
1216
1217     }
1218
1219     /* Create a new context for the thread */
1220     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
1221 }
1222
1223 /*****************************************************************************
1224  * FindContext
1225  *
1226  * Finds a context for the current render target and thread
1227  *
1228  * Parameters:
1229  *  target: Render target to find the context for
1230  *  tid: Thread to activate the context for
1231  *
1232  * Returns: The needed context
1233  *
1234  *****************************************************************************/
1235 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
1236     IWineD3DSwapChain *swapchain = NULL;
1237     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
1238     WineD3DContext *context = This->activeContext;
1239     BOOL oldRenderOffscreen = This->render_offscreen;
1240     const WINED3DFORMAT oldFmt = ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->resource.format;
1241     const WINED3DFORMAT newFmt = ((IWineD3DSurfaceImpl *) target)->resource.format;
1242     const struct StateEntry *StateTable = This->StateTable;
1243
1244     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
1245      * the alpha blend state changes with different render target formats
1246      */
1247     if(oldFmt != newFmt) {
1248         const struct GlPixelFormatDesc *glDesc;
1249         const StaticPixelFormatDesc *old = getFormatDescEntry(oldFmt, NULL, NULL);
1250         const StaticPixelFormatDesc *new = getFormatDescEntry(newFmt, &GLINFO_LOCATION, &glDesc);
1251
1252         /* Disable blending when the alphaMask has changed and when a format doesn't support blending */
1253         if((old->alphaMask && !new->alphaMask) || (!old->alphaMask && new->alphaMask) || !(glDesc->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING)) {
1254             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1255         }
1256     }
1257
1258     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
1259         TRACE("Rendering onscreen\n");
1260
1261         context = findThreadContextForSwapChain(swapchain, tid);
1262
1263         This->render_offscreen = FALSE;
1264         /* The context != This->activeContext will catch a NOP context change. This can occur
1265          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
1266          * rendering. No context change is needed in that case
1267          */
1268
1269         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
1270             if(This->pbufferContext && tid == This->pbufferContext->tid) {
1271                 This->pbufferContext->tid = 0;
1272             }
1273         }
1274         IWineD3DSwapChain_Release(swapchain);
1275
1276         if(oldRenderOffscreen) {
1277             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1278             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1279             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1280             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1281             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1282         }
1283
1284     } else {
1285         TRACE("Rendering offscreen\n");
1286         This->render_offscreen = TRUE;
1287
1288         switch(wined3d_settings.offscreen_rendering_mode) {
1289             case ORM_FBO:
1290                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
1291                 if(This->activeContext && tid == This->lastThread) {
1292                     context = This->activeContext;
1293                 } else {
1294                     /* This may happen if the app jumps straight into offscreen rendering
1295                      * Start using the context of the primary swapchain. tid == 0 is no problem
1296                      * for findThreadContextForSwapChain.
1297                      *
1298                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1299                      * is perfect to call.
1300                      */
1301                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1302                 }
1303                 break;
1304
1305             case ORM_PBUFFER:
1306             {
1307                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
1308                 if(This->pbufferContext == NULL ||
1309                    This->pbufferWidth < targetimpl->currentDesc.Width ||
1310                    This->pbufferHeight < targetimpl->currentDesc.Height) {
1311                     if(This->pbufferContext) {
1312                         DestroyContext(This, This->pbufferContext);
1313                     }
1314
1315                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
1316                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
1317                      */
1318                     This->pbufferContext = CreateContext(This, targetimpl,
1319                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
1320                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
1321                     This->pbufferWidth = targetimpl->currentDesc.Width;
1322                     This->pbufferHeight = targetimpl->currentDesc.Height;
1323                    }
1324
1325                    if(This->pbufferContext) {
1326                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
1327                            FIXME("The PBuffr context is only supported for one thread for now!\n");
1328                        }
1329                        This->pbufferContext->tid = tid;
1330                        context = This->pbufferContext;
1331                        break;
1332                    } else {
1333                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
1334                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
1335                    }
1336             }
1337
1338             case ORM_BACKBUFFER:
1339                 /* Stay with the currently active context for back buffer rendering */
1340                 if(This->activeContext && tid == This->lastThread) {
1341                     context = This->activeContext;
1342                 } else {
1343                     /* This may happen if the app jumps straight into offscreen rendering
1344                      * Start using the context of the primary swapchain. tid == 0 is no problem
1345                      * for findThreadContextForSwapChain.
1346                      *
1347                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1348                      * is perfect to call.
1349                      */
1350                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1351                 }
1352                 break;
1353         }
1354
1355         if(!oldRenderOffscreen) {
1356             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1357             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1358             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1359             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1360             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1361         }
1362     }
1363
1364     /* When switching away from an offscreen render target, and we're not using FBOs,
1365      * we have to read the drawable into the texture. This is done via PreLoad(and
1366      * SFLAG_INDRAWABLE set on the surface). There are some things that need care though.
1367      * PreLoad needs a GL context, and FindContext is called before the context is activated.
1368      * It also has to be called with the old rendertarget active, otherwise a wrong drawable
1369      * is read. This leads to these possible situations:
1370      *
1371      * 0) lastActiveRenderTarget == target && oldTid == newTid:
1372      *    Nothing to do, we don't even reach this code in this case...
1373      *
1374      * 1) lastActiveRenderTarget != target && oldTid == newTid:
1375      *    The currently active context is OK for readback. Call PreLoad, and it
1376      *    performs the read
1377      *
1378      * 2) lastActiveRenderTarget == target && oldTid != newTid:
1379      *    Nothing to do - the drawable is unchanged
1380      *
1381      * 3) lastActiveRenderTarget != target && oldTid != newTid:
1382      *    This is tricky. We have to get a context with the old drawable from somewhere
1383      *    before we can switch to the new context. In this case, PreLoad calls
1384      *    ActivateContext(lastActiveRenderTarget) from the new(current) thread. This
1385      *    is case (2) then. The old drawable is activated for the new thread, and the
1386      *    readback can be done. The recursed ActivateContext does *not* call PreLoad again.
1387      *    After that, the outer ActivateContext(which calls PreLoad) can activate the new
1388      *    target for the new thread
1389      */
1390     if (readTexture && This->lastActiveRenderTarget != target) {
1391         BOOL oldInDraw = This->isInDraw;
1392
1393         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
1394          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
1395          * when using offscreen rendering with multithreading
1396          */
1397         This->isInDraw = TRUE;
1398
1399         /* Do that before switching the context:
1400          * Read the back buffer of the old drawable into the destination texture
1401          */
1402         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
1403
1404         /* Assume that the drawable will be modified by some other things now */
1405         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
1406
1407         This->isInDraw = oldInDraw;
1408     }
1409
1410     return context;
1411 }
1412
1413 static void apply_draw_buffer(IWineD3DDeviceImpl *This, IWineD3DSurface *target, BOOL blit)
1414 {
1415     IWineD3DSwapChain *swapchain;
1416
1417     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain)))
1418     {
1419         IWineD3DSwapChain_Release((IUnknown *)swapchain);
1420         ENTER_GL();
1421         glDrawBuffer(surface_get_gl_buffer(target, swapchain));
1422         checkGLcall("glDrawBuffers()");
1423         LEAVE_GL();
1424     }
1425     else
1426     {
1427         ENTER_GL();
1428         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1429         {
1430             if (!blit)
1431             {
1432                 if (GL_SUPPORT(ARB_DRAW_BUFFERS))
1433                 {
1434                     GL_EXTCALL(glDrawBuffersARB(GL_LIMITS(buffers), This->draw_buffers));
1435                     checkGLcall("glDrawBuffers()");
1436                 }
1437                 else
1438                 {
1439                     glDrawBuffer(This->draw_buffers[0]);
1440                     checkGLcall("glDrawBuffer()");
1441                 }
1442             } else {
1443                 glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
1444                 checkGLcall("glDrawBuffer()");
1445             }
1446         }
1447         else
1448         {
1449             glDrawBuffer(This->offscreenBuffer);
1450             checkGLcall("glDrawBuffer()");
1451         }
1452         LEAVE_GL();
1453     }
1454 }
1455
1456 /*****************************************************************************
1457  * ActivateContext
1458  *
1459  * Finds a rendering context and drawable matching the device and render
1460  * target for the current thread, activates them and puts them into the
1461  * requested state.
1462  *
1463  * Params:
1464  *  This: Device to activate the context for
1465  *  target: Requested render target
1466  *  usage: Prepares the context for blitting, drawing or other actions
1467  *
1468  *****************************************************************************/
1469 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
1470     DWORD                         tid = GetCurrentThreadId();
1471     DWORD                         i, dirtyState, idx;
1472     BYTE                          shift;
1473     WineD3DContext                *context;
1474     const struct StateEntry       *StateTable = This->StateTable;
1475
1476     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
1477     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
1478         context = FindContext(This, target, tid);
1479         context->draw_buffer_dirty = TRUE;
1480         This->lastActiveRenderTarget = target;
1481         This->lastThread = tid;
1482     } else {
1483         /* Stick to the old context */
1484         context = This->activeContext;
1485     }
1486
1487     /* Activate the opengl context */
1488     if(last_device != This || context != This->activeContext) {
1489         BOOL ret;
1490
1491         /* Prevent an unneeded context switch as those are expensive */
1492         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
1493             TRACE("Already using gl context %p\n", context->glCtx);
1494         }
1495         else {
1496             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
1497
1498             ret = pwglMakeCurrent(context->hdc, context->glCtx);
1499             if(ret == FALSE) {
1500                 ERR("Failed to activate the new context\n");
1501             } else if(!context->last_was_blit) {
1502                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1503             } else {
1504                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1505             }
1506         }
1507         if(This->activeContext->vshader_const_dirty) {
1508             memset(This->activeContext->vshader_const_dirty, 1,
1509                    sizeof(*This->activeContext->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
1510         }
1511         if(This->activeContext->pshader_const_dirty) {
1512             memset(This->activeContext->pshader_const_dirty, 1,
1513                    sizeof(*This->activeContext->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
1514         }
1515         This->activeContext = context;
1516         last_device = This;
1517     }
1518
1519     switch (usage) {
1520         case CTXUSAGE_CLEAR:
1521         case CTXUSAGE_DRAWPRIM:
1522             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1523                 context_apply_fbo_state((IWineD3DDevice *)This);
1524             }
1525             if (context->draw_buffer_dirty) {
1526                 apply_draw_buffer(This, target, FALSE);
1527                 context->draw_buffer_dirty = FALSE;
1528             }
1529             break;
1530
1531         case CTXUSAGE_BLIT:
1532             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1533                 if (This->render_offscreen) {
1534                     FIXME("Activating for CTXUSAGE_BLIT for an offscreen target with ORM_FBO. This should be avoided.\n");
1535                     context_bind_fbo((IWineD3DDevice *)This, GL_FRAMEBUFFER_EXT, &context->dst_fbo);
1536                     context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, 0, target);
1537
1538                     ENTER_GL();
1539                     GL_EXTCALL(glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, 0));
1540                     checkGLcall("glFramebufferRenderbufferEXT");
1541                     LEAVE_GL();
1542                 } else {
1543                     ENTER_GL();
1544                     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
1545                     checkGLcall("glFramebufferRenderbufferEXT");
1546                     LEAVE_GL();
1547                 }
1548                 context->draw_buffer_dirty = TRUE;
1549             }
1550             if (context->draw_buffer_dirty) {
1551                 apply_draw_buffer(This, target, TRUE);
1552                 if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
1553                     context->draw_buffer_dirty = FALSE;
1554                 }
1555             }
1556             break;
1557
1558         default:
1559             break;
1560     }
1561
1562     switch(usage) {
1563         case CTXUSAGE_RESOURCELOAD:
1564             /* This does not require any special states to be set up */
1565             break;
1566
1567         case CTXUSAGE_CLEAR:
1568             if(context->last_was_blit) {
1569                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1570             }
1571
1572             /* Blending and clearing should be orthogonal, but tests on the nvidia driver show that disabling
1573              * blending when clearing improves the clearing performance incredibly.
1574              */
1575             ENTER_GL();
1576             glDisable(GL_BLEND);
1577             LEAVE_GL();
1578             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1579
1580             ENTER_GL();
1581             glEnable(GL_SCISSOR_TEST);
1582             checkGLcall("glEnable GL_SCISSOR_TEST");
1583             LEAVE_GL();
1584             context->last_was_blit = FALSE;
1585             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1586             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1587             break;
1588
1589         case CTXUSAGE_DRAWPRIM:
1590             /* This needs all dirty states applied */
1591             if(context->last_was_blit) {
1592                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1593             }
1594
1595             IWineD3DDeviceImpl_FindTexUnitMap(This);
1596
1597             for(i=0; i < context->numDirtyEntries; i++) {
1598                 dirtyState = context->dirtyArray[i];
1599                 idx = dirtyState >> 5;
1600                 shift = dirtyState & 0x1f;
1601                 context->isStateDirty[idx] &= ~(1 << shift);
1602                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
1603             }
1604             context->numDirtyEntries = 0; /* This makes the whole list clean */
1605             context->last_was_blit = FALSE;
1606             break;
1607
1608         case CTXUSAGE_BLIT:
1609             SetupForBlit(This, context,
1610                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
1611                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
1612             break;
1613
1614         default:
1615             FIXME("Unexpected context usage requested\n");
1616     }
1617 }
1618
1619 WineD3DContext *getActiveContext(void) {
1620     return last_device->activeContext;
1621 }