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         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, matchtry;
 450     short redBits, greenBits, blueBits, alphaBits, colorBits;
 451     short depthBits=0, stencilBits=0;
 452
 453     struct match_type {
 454         BOOL require_aux;
 455         BOOL exact_alpha;
 456         BOOL exact_color;
 457     } matches[] = {
 458         /* First, try without alpha match buffers. MacOS supports aux buffers only
 459          * on A8R8G8B8, and we prefer better offscreen rendering over an alpha match.
 460          * Then try without aux buffers - this is the most common cause for not
 461          * finding a pixel format. Also some drivers(the open source ones)
 462          * only offer 32 bit ARB pixel formats. First try without an exact alpha
 463          * match, then try without an exact alpha and color match.
 464          */
 465         { TRUE,  TRUE,  TRUE  },
 466         { TRUE,  FALSE, TRUE  },
 467         { FALSE, TRUE,  TRUE  },
 468         { FALSE, FALSE, TRUE  },
 469         { TRUE,  FALSE, FALSE },
 470         { FALSE, FALSE, FALSE },
 471     };
 472
 473     int i = 0;
 474     int nCfgs = This->adapter->nCfgs;
 475
 476     TRACE("ColorFormat=%s, DepthStencilFormat=%s, auxBuffers=%d, numSamples=%d, pbuffer=%d, findCompatible=%d\n",
 477           debug_d3dformat(ColorFormat), debug_d3dformat(DepthStencilFormat), auxBuffers, numSamples, pbuffer, findCompatible);
 478
 479     if(!getColorBits(ColorFormat, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
 480         ERR("Unable to get color bits for format %s (%#x)!\n", debug_d3dformat(ColorFormat), ColorFormat);
 481         return 0;
 482     }
 483
 484     /* In WGL both color, depth and stencil are features of a pixel format. In case of D3D they are separate.
 485      * You are able to add a depth + stencil surface at a later stage when you need it.
 486      * In order to support this properly in WineD3D we need the ability to recreate the opengl context and
 487      * drawable when this is required. This is very tricky as we need to reapply ALL opengl states for the new
 488      * context, need torecreate shaders, textures and other resources.
 489      *
 490      * The context manager already takes care of the state problem and for the other tasks code from Reset
 491      * can be used. These changes are way to risky during the 1.0 code freeze which is taking place right now.
 492      * Likely a lot of other new bugs will be exposed. For that reason request a depth stencil surface all the
 493      * time. It can cause a slight performance hit but fixes a lot of regressions. A fixme reminds of that this
 494      * issue needs to be fixed. */
 495     if(DepthStencilFormat != WINED3DFMT_D24S8)
 496         FIXME("Add OpenGL context recreation support to SetDepthStencilSurface\n");
 497
 498     DepthStencilFormat = WINED3DFMT_D24S8;
 499
 500     if(DepthStencilFormat) {
 501         getDepthStencilBits(DepthStencilFormat, &depthBits, &stencilBits);
 502     }
 503
 504     for(matchtry = 0; matchtry < (sizeof(matches) / sizeof(matches[0])) && !iPixelFormat; matchtry++) {
 505         for(i=0; i<nCfgs; i++) {
 506             BOOL exactDepthMatch = TRUE;
 507             WineD3D_PixelFormat *cfg = &This->adapter->cfgs[i];
 508
 509             /* For now only accept RGBA formats. Perhaps some day we will
 510              * allow floating point formats for pbuffers. */
 511             if(cfg->iPixelType != WGL_TYPE_RGBA_ARB)
 512                 continue;
 513
 514             /* In window mode (!pbuffer) we need a window drawable format and double buffering. */
 515             if(!pbuffer && !(cfg->windowDrawable && cfg->doubleBuffer))
 516                 continue;
 517
 518             /* We like to have aux buffers in backbuffer mode */
 519             if(auxBuffers && !cfg->auxBuffers && matches[matchtry].require_aux)
 520                 continue;
 521
 522             /* In pbuffer-mode we need a pbuffer-capable format but we don't want double buffering */
 523             if(pbuffer && (!cfg->pbufferDrawable || cfg->doubleBuffer))
 524                 continue;
 525
 526             if(matches[matchtry].exact_color) {
 527                 if(cfg->redSize != redBits)
 528                     continue;
 529                 if(cfg->greenSize != greenBits)
 530                     continue;
 531                 if(cfg->blueSize != blueBits)
 532                     continue;
 533             } else {
 534                 if(cfg->redSize < redBits)
 535                     continue;
 536                 if(cfg->greenSize < greenBits)
 537                     continue;
 538                 if(cfg->blueSize < blueBits)
 539                     continue;
 540             }
 541             if(matches[matchtry].exact_alpha) {
 542                 if(cfg->alphaSize != alphaBits)
 543                     continue;
 544             } else {
 545                 if(cfg->alphaSize < alphaBits)
 546                     continue;
 547             }
 548
 549             /* We try to locate a format which matches our requirements exactly. In case of
 550              * depth it is no problem to emulate 16-bit using e.g. 24-bit, so accept that. */
 551             if(cfg->depthSize < depthBits)
 552                 continue;
 553             else if(cfg->depthSize > depthBits)
 554                 exactDepthMatch = FALSE;
 555
 556             /* In all cases make sure the number of stencil bits matches our requirements
 557              * even when we don't need stencil because it could affect performance EXCEPT
 558              * on cards which don't offer depth formats without stencil like the i915 drivers
 559              * on Linux. */
 560             if(stencilBits != cfg->stencilSize && !(This->adapter->brokenStencil && stencilBits <= cfg->stencilSize))
 561                 continue;
 562
 563             /* Check multisampling support */
 564             if(cfg->numSamples != numSamples)
 565                 continue;
 566
 567             /* When we have passed all the checks then we have found a format which matches our
 568              * requirements. Note that we only check for a limit number of capabilities right now,
 569              * so there can easily be a dozen of pixel formats which appear to be the 'same' but
 570              * can still differ in things like multisampling, stereo, SRGB and other flags.
 571              */
 572
 573             /* Exit the loop as we have found a format :) */
 574             if(exactDepthMatch) {
 575                 iPixelFormat = cfg->iPixelFormat;
 576                 break;
 577             } else if(!iPixelFormat) {
 578                 /* In the end we might end up with a format which doesn't exactly match our depth
 579                  * requirements. Accept the first format we found because formats with higher iPixelFormat
 580                  * values tend to have more extended capabilities (e.g. multisampling) which we don't need. */
 581                 iPixelFormat = cfg->iPixelFormat;
 582             }
 583         }
 584     }
 585
 586     /* When findCompatible is set and no suitable format was found, let ChoosePixelFormat choose a pixel format in order not to crash. */
 587     if(!iPixelFormat && !findCompatible) {
 588         ERR("Can't find a suitable iPixelFormat\n");
 589         return FALSE;
 590     } else if(!iPixelFormat) {
 591         PIXELFORMATDESCRIPTOR pfd;
 592
 593         TRACE("Falling back to ChoosePixelFormat as we weren't able to find an exactly matching pixel format\n");
 594         /* PixelFormat selection */
 595         ZeroMemory(&pfd, sizeof(pfd));
 596         pfd.nSize      = sizeof(pfd);
 597         pfd.nVersion   = 1;
 598         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 599         pfd.iPixelType = PFD_TYPE_RGBA;
 600         pfd.cAlphaBits = alphaBits;
 601         pfd.cColorBits = colorBits;
 602         pfd.cDepthBits = depthBits;
 603         pfd.cStencilBits = stencilBits;
 604         pfd.iLayerType = PFD_MAIN_PLANE;
 605
 606         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 607         if(!iPixelFormat) {
 608             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 609             ERR("Can't find a suitable iPixelFormat\n");
 610             return FALSE;
 611         }
 612     }
 613
 614     TRACE("Found iPixelFormat=%d for ColorFormat=%s, DepthStencilFormat=%s\n", iPixelFormat, debug_d3dformat(ColorFormat), debug_d3dformat(DepthStencilFormat));
 615     return iPixelFormat;
 616 }
 617
 618 /*****************************************************************************
 619  * CreateContext
 620  *
 621  * Creates a new context for a window, or a pbuffer context.
 622  *
 623  * * Params:
 624  *  This: Device to activate the context for
 625  *  target: Surface this context will render to
 626  *  win_handle: handle to the window which we are drawing to
 627  *  create_pbuffer: tells whether to create a pbuffer or not
 628  *  pPresentParameters: contains the pixelformats to use for onscreen rendering
 629  *
 630  *****************************************************************************/
 631 WineD3DContext *CreateContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target, HWND win_handle, BOOL create_pbuffer, const WINED3DPRESENT_PARAMETERS *pPresentParms) {
 632     HDC oldDrawable, hdc;
 633     HPBUFFERARB pbuffer = NULL;
 634     HGLRC ctx = NULL, oldCtx;
 635     WineD3DContext *ret = NULL;
 636     int s;
 637
 638     TRACE("(%p): Creating a %s context for render target %p\n", This, create_pbuffer ? "offscreen" : "onscreen", target);
 639
 640     if(create_pbuffer) {
 641         HDC hdc_parent = GetDC(win_handle);
 642         int iPixelFormat = 0;
 643
 644         IWineD3DSurface *StencilSurface = This->stencilBufferTarget;
 645         WINED3DFORMAT StencilBufferFormat = (NULL != StencilSurface) ? ((IWineD3DSurfaceImpl *) StencilSurface)->resource.format : 0;
 646
 647         /* Try to find a pixel format with pbuffer support. */
 648         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format, StencilBufferFormat, FALSE /* auxBuffers */, 0 /* numSamples */, TRUE /* PBUFFER */, FALSE /* findCompatible */);
 649         if(!iPixelFormat) {
 650             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 651
 652             /* For some reason we weren't able to find a format, try to find something instead of crashing.
 653              * A reason for failure could have been wglChoosePixelFormatARB strictness. */
 654             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc_parent, target->resource.format, StencilBufferFormat, FALSE /* auxBuffer */, 0 /* numSamples */, TRUE /* PBUFFER */, TRUE /* findCompatible */);
 655         }
 656
 657         /* This shouldn't happen as ChoosePixelFormat always returns something */
 658         if(!iPixelFormat) {
 659             ERR("Unable to locate a pixel format for a pbuffer\n");
 660             ReleaseDC(win_handle, hdc_parent);
 661             goto out;
 662         }
 663
 664         TRACE("Creating a pBuffer drawable for the new context\n");
 665         pbuffer = GL_EXTCALL(wglCreatePbufferARB(hdc_parent, iPixelFormat, target->currentDesc.Width, target->currentDesc.Height, 0));
 666         if(!pbuffer) {
 667             ERR("Cannot create a pbuffer\n");
 668             ReleaseDC(win_handle, hdc_parent);
 669             goto out;
 670         }
 671
 672         /* In WGL a pbuffer is 'wrapped' inside a HDC to 'fool' wglMakeCurrent */
 673         hdc = GL_EXTCALL(wglGetPbufferDCARB(pbuffer));
 674         if(!hdc) {
 675             ERR("Cannot get a HDC for pbuffer (%p)\n", pbuffer);
 676             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 677             ReleaseDC(win_handle, hdc_parent);
 678             goto out;
 679         }
 680         ReleaseDC(win_handle, hdc_parent);
 681     } else {
 682         PIXELFORMATDESCRIPTOR pfd;
 683         int iPixelFormat;
 684         int res;
 685         WINED3DFORMAT ColorFormat = target->resource.format;
 686         WINED3DFORMAT DepthStencilFormat = 0;
 687         BOOL auxBuffers = FALSE;
 688         int numSamples = 0;
 689
 690         hdc = GetDC(win_handle);
 691         if(hdc == NULL) {
 692             ERR("Cannot retrieve a device context!\n");
 693             goto out;
 694         }
 695
 696         /* In case of ORM_BACKBUFFER, make sure to request an alpha component for X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
 697         if(wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 698             auxBuffers = TRUE;
 699
 700             if(target->resource.format == WINED3DFMT_X4R4G4B4)
 701                 ColorFormat = WINED3DFMT_A4R4G4B4;
 702             else if(target->resource.format == WINED3DFMT_X8R8G8B8)
 703                 ColorFormat = WINED3DFMT_A8R8G8B8;
 704         }
 705
 706         /* DirectDraw supports 8bit paletted render targets and these are used by old games like Starcraft and C&C.
 707          * Most modern hardware doesn't support 8bit natively so we perform some form of 8bit -> 32bit conversion.
 708          * The conversion (ab)uses the alpha component for storing the palette index. For this reason we require
 709          * a format with 8bit alpha, so request A8R8G8B8. */
 710         if(ColorFormat == WINED3DFMT_P8)
 711             ColorFormat = WINED3DFMT_A8R8G8B8;
 712
 713         /* Retrieve the depth stencil format from the present parameters.
 714          * The choice of the proper format can give a nice performance boost
 715          * in case of GPU limited programs. */
 716         if(pPresentParms->EnableAutoDepthStencil) {
 717             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 718             DepthStencilFormat = pPresentParms->AutoDepthStencilFormat;
 719         }
 720
 721         /* D3D only allows multisampling when SwapEffect is set to WINED3DSWAPEFFECT_DISCARD */
 722         if(pPresentParms->MultiSampleType && (pPresentParms->SwapEffect == WINED3DSWAPEFFECT_DISCARD)) {
 723             if(!GL_SUPPORT(ARB_MULTISAMPLE))
 724                 ERR("The program is requesting multisampling without support!\n");
 725             else {
 726                 ERR("Requesting MultiSampleType=%d\n", pPresentParms->MultiSampleType);
 727                 numSamples = pPresentParms->MultiSampleType;
 728             }
 729         }
 730
 731         /* Try to find a pixel format which matches our requirements */
 732         iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, ColorFormat, DepthStencilFormat, auxBuffers, numSamples, FALSE /* PBUFFER */, FALSE /* findCompatible */);
 733
 734         /* Try to locate a compatible format if we weren't able to find anything */
 735         if(!iPixelFormat) {
 736             TRACE("Trying to locate a compatible pixel format because an exact match failed.\n");
 737             iPixelFormat = WineD3D_ChoosePixelFormat(This, hdc, ColorFormat, DepthStencilFormat, auxBuffers, 0 /* numSamples */, FALSE /* PBUFFER */, TRUE /* findCompatible */ );
 738         }
 739
 740         /* If we still don't have a pixel format, something is very wrong as ChoosePixelFormat barely fails */
 741         if(!iPixelFormat) {
 742             ERR("Can't find a suitable iPixelFormat\n");
 743             return FALSE;
 744         }
 745
 746         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 747         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 748         if(!res) {
 749             int oldPixelFormat = GetPixelFormat(hdc);
 750
 751             /* By default WGL doesn't allow pixel format adjustments but we need it here.
 752              * For this reason there is a WINE-specific wglSetPixelFormat which allows you to
 753              * set the pixel format multiple times. Only use it when it is really needed. */
 754
 755             if(oldPixelFormat == iPixelFormat) {
 756                 /* We don't have to do anything as the formats are the same :) */
 757             } else if(oldPixelFormat && GL_SUPPORT(WGL_WINE_PIXEL_FORMAT_PASSTHROUGH)) {
 758                 res = GL_EXTCALL(wglSetPixelFormatWINE(hdc, iPixelFormat, NULL));
 759
 760                 if(!res) {
 761                     ERR("wglSetPixelFormatWINE failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 762                     return FALSE;
 763                 }
 764             } else if(oldPixelFormat) {
 765                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 766                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 767                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 768             } else {
 769                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 770                 return FALSE;
 771             }
 772         }
 773     }
 774
 775     ctx = pwglCreateContext(hdc);
 776     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 777
 778     if(!ctx) {
 779         ERR("Failed to create a WGL context\n");
 780         if(create_pbuffer) {
 781             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 782             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 783         }
 784         goto out;
 785     }
 786     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 787     if(!ret) {
 788         ERR("Failed to add the newly created context to the context list\n");
 789         pwglDeleteContext(ctx);
 790         if(create_pbuffer) {
 791             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 792             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 793         }
 794         goto out;
 795     }
 796     ret->surface = (IWineD3DSurface *) target;
 797     ret->isPBuffer = create_pbuffer;
 798     ret->tid = GetCurrentThreadId();
 799     if(This->shader_backend->shader_dirtifyable_constants((IWineD3DDevice *) This)) {
 800         /* Create the dirty constants array and initialize them to dirty */
 801         ret->vshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 802                 sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 803         ret->pshader_const_dirty = HeapAlloc(GetProcessHeap(), 0,
 804                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 805         memset(ret->vshader_const_dirty, 1,
 806                sizeof(*ret->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
 807         memset(ret->pshader_const_dirty, 1,
 808                 sizeof(*ret->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
 809     }
 810
 811     TRACE("Successfully created new context %p\n", ret);
 812
 813     list_init(&ret->fbo_list);
 814
 815     /* Set up the context defaults */
 816     oldCtx  = pwglGetCurrentContext();
 817     oldDrawable = pwglGetCurrentDC();
 818     if(oldCtx && oldDrawable) {
 819         /* See comment in ActivateContext context switching */
 820         This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
 821     }
 822     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 823         ERR("Cannot activate context to set up defaults\n");
 824         goto out;
 825     }
 826
 827     ENTER_GL();
 828
 829     glGetIntegerv(GL_AUX_BUFFERS, &ret->aux_buffers);
 830
 831     TRACE("Setting up the screen\n");
 832     /* Clear the screen */
 833     glClearColor(1.0, 0.0, 0.0, 0.0);
 834     checkGLcall("glClearColor");
 835     glClearIndex(0);
 836     glClearDepth(1);
 837     glClearStencil(0xffff);
 838
 839     checkGLcall("glClear");
 840
 841     glColor3f(1.0, 1.0, 1.0);
 842     checkGLcall("glColor3f");
 843
 844     glEnable(GL_LIGHTING);
 845     checkGLcall("glEnable");
 846
 847     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 848     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 849
 850     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 851     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 852
 853     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 854     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 855
 856     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 857     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 858     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 859     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 860
 861     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 862         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 863          * and textures in DIB sections(due to the memory protection).
 864          */
 865         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 866         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 867     }
 868     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 869         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 870          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 871          * GL_VERTEX_BLEND_ARB isn't enabled too
 872          */
 873         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 874         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 875     }
 876     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 877         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 878          * the previous texture where to source the offset from is always unit - 1.
 879          */
 880         for(s = 1; s < GL_LIMITS(textures); s++) {
 881             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 882             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 883             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 884         }
 885     }
 886
 887     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 888         for(s = 0; s < GL_LIMITS(textures); s++) {
 889             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 890             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 891             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 892         }
 893     }
 894     LEAVE_GL();
 895
 896     /* Never keep GL_FRAGMENT_SHADER_ATI enabled on a context that we switch away from,
 897      * but enable it for the first context we create, and reenable it on the old context
 898      */
 899     if(oldDrawable && oldCtx) {
 900         pwglMakeCurrent(oldDrawable, oldCtx);
 901     } else {
 902         last_device = This;
 903     }
 904     This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
 905
 906     return ret;
 907
 908 out:
 909     return NULL;
 910 }
 911
 912 /*****************************************************************************
 913  * RemoveContextFromArray
 914  *
 915  * Removes a context from the context manager. The opengl context is not
 916  * destroyed or unset. context is not a valid pointer after that call.
 917  *
 918  * Similar to the former call this isn't a performance critical function. A
 919  * helper function for DestroyContext.
 920  *
 921  * Params:
 922  *  This: Device to activate the context for
 923  *  context: Context to remove
 924  *
 925  *****************************************************************************/
 926 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 927     UINT t, s;
 928     WineD3DContext **oldArray = This->contexts;
 929
 930     TRACE("Removing ctx %p\n", context);
 931
 932     This->numContexts--;
 933
 934     if(This->numContexts) {
 935         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 936         if(!This->contexts) {
 937             ERR("Cannot allocate a new context array, PANIC!!!\n");
 938         }
 939         t = 0;
 940         /* Note that we decreased numContexts a few lines up, so use '<=' instead of '<' */
 941         for(s = 0; s <= This->numContexts; s++) {
 942             if(oldArray[s] == context) continue;
 943             This->contexts[t] = oldArray[s];
 944             t++;
 945         }
 946     } else {
 947         This->contexts = NULL;
 948     }
 949
 950     HeapFree(GetProcessHeap(), 0, context);
 951     HeapFree(GetProcessHeap(), 0, oldArray);
 952 }
 953
 954 /*****************************************************************************
 955  * DestroyContext
 956  *
 957  * Destroys a wineD3DContext
 958  *
 959  * Params:
 960  *  This: Device to activate the context for
 961  *  context: Context to destroy
 962  *
 963  *****************************************************************************/
 964 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 965     struct fbo_entry *entry, *entry2;
 966
 967     TRACE("Destroying ctx %p\n", context);
 968
 969     /* The correct GL context needs to be active to cleanup the GL resources below */
 970     if(pwglGetCurrentContext() != context->glCtx){
 971         pwglMakeCurrent(context->hdc, context->glCtx);
 972         last_device = NULL;
 973     }
 974
 975     ENTER_GL();
 976
 977     LIST_FOR_EACH_ENTRY_SAFE(entry, entry2, &context->fbo_list, struct fbo_entry, entry) {
 978         context_destroy_fbo_entry(This, entry);
 979     }
 980     if (context->src_fbo) {
 981         TRACE("Destroy src FBO %d\n", context->src_fbo);
 982         context_destroy_fbo(This, &context->src_fbo);
 983     }
 984     if (context->dst_fbo) {
 985         TRACE("Destroy dst FBO %d\n", context->dst_fbo);
 986         context_destroy_fbo(This, &context->dst_fbo);
 987     }
 988
 989     LEAVE_GL();
 990
 991     /* Cleanup the GL context */
 992     pwglMakeCurrent(NULL, NULL);
 993     if(context->isPBuffer) {
 994         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 995         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 996     } else ReleaseDC(context->win_handle, context->hdc);
 997     pwglDeleteContext(context->glCtx);
 998
 999     HeapFree(GetProcessHeap(), 0, context->vshader_const_dirty);
1000     HeapFree(GetProcessHeap(), 0, context->pshader_const_dirty);
1001     RemoveContextFromArray(This, context);
1002 }
1003
1004 static inline void set_blit_dimension(UINT width, UINT height) {
1005     glMatrixMode(GL_PROJECTION);
1006     checkGLcall("glMatrixMode(GL_PROJECTION)");
1007     glLoadIdentity();
1008     checkGLcall("glLoadIdentity()");
1009     glOrtho(0, width, height, 0, 0.0, -1.0);
1010     checkGLcall("glOrtho");
1011     glViewport(0, 0, width, height);
1012     checkGLcall("glViewport");
1013 }
1014
1015 /*****************************************************************************
1016  * SetupForBlit
1017  *
1018  * Sets up a context for DirectDraw blitting.
1019  * All texture units are disabled, texture unit 0 is set as current unit
1020  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
1021  * color writing enabled for all channels
1022  * register combiners disabled, shaders disabled
1023  * world matrix is set to identity, texture matrix 0 too
1024  * projection matrix is setup for drawing screen coordinates
1025  *
1026  * Params:
1027  *  This: Device to activate the context for
1028  *  context: Context to setup
1029  *  width: render target width
1030  *  height: render target height
1031  *
1032  *****************************************************************************/
1033 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
1034     int i, sampler;
1035     const struct StateEntry *StateTable = This->StateTable;
1036
1037     TRACE("Setting up context %p for blitting\n", context);
1038     if(context->last_was_blit) {
1039         if(context->blit_w != width || context->blit_h != height) {
1040             set_blit_dimension(width, height);
1041             context->blit_w = width; context->blit_h = height;
1042             /* No need to dirtify here, the states are still dirtified because they weren't
1043              * applied since the last SetupForBlit call. Otherwise last_was_blit would not
1044              * be set
1045              */
1046         }
1047         TRACE("Context is already set up for blitting, nothing to do\n");
1048         return;
1049     }
1050     context->last_was_blit = TRUE;
1051
1052     /* TODO: Use a display list */
1053
1054     /* Disable shaders */
1055     This->shader_backend->shader_cleanup((IWineD3DDevice *) This);
1056     Context_MarkStateDirty(context, STATE_VSHADER, StateTable);
1057     Context_MarkStateDirty(context, STATE_PIXELSHADER, StateTable);
1058
1059     /* Disable all textures. The caller can then bind a texture it wants to blit
1060      * from
1061      */
1062     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
1063         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1064          * function texture unit. No need to care for higher samplers
1065          */
1066         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
1067             sampler = This->rev_tex_unit_map[i];
1068             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1069             checkGLcall("glActiveTextureARB");
1070
1071             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1072                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1073                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1074             }
1075             glDisable(GL_TEXTURE_3D);
1076             checkGLcall("glDisable GL_TEXTURE_3D");
1077             if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1078                 glDisable(GL_TEXTURE_RECTANGLE_ARB);
1079                 checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1080             }
1081             glDisable(GL_TEXTURE_2D);
1082             checkGLcall("glDisable GL_TEXTURE_2D");
1083
1084             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1085             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1086
1087             if (sampler != -1) {
1088                 if (sampler < MAX_TEXTURES) {
1089                     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1090                 }
1091                 Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1092             }
1093         }
1094         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1095         checkGLcall("glActiveTextureARB");
1096     }
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
1192     set_blit_dimension(width, height);
1193     context->blit_w = width; context->blit_h = height;
1194     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1195     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1196
1197
1198     This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1199 }
1200
1201 /*****************************************************************************
1202  * findThreadContextForSwapChain
1203  *
1204  * Searches a swapchain for all contexts and picks one for the thread tid.
1205  * If none can be found the swapchain is requested to create a new context
1206  *
1207  *****************************************************************************/
1208 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
1209     int i;
1210
1211     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1212         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1213             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1214         }
1215
1216     }
1217
1218     /* Create a new context for the thread */
1219     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
1220 }
1221
1222 /*****************************************************************************
1223  * FindContext
1224  *
1225  * Finds a context for the current render target and thread
1226  *
1227  * Parameters:
1228  *  target: Render target to find the context for
1229  *  tid: Thread to activate the context for
1230  *
1231  * Returns: The needed context
1232  *
1233  *****************************************************************************/
1234 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
1235     IWineD3DSwapChain *swapchain = NULL;
1236     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
1237     WineD3DContext *context = This->activeContext;
1238     BOOL oldRenderOffscreen = This->render_offscreen;
1239     const WINED3DFORMAT oldFmt = ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->resource.format;
1240     const WINED3DFORMAT newFmt = ((IWineD3DSurfaceImpl *) target)->resource.format;
1241     const struct StateEntry *StateTable = This->StateTable;
1242
1243     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
1244      * the alpha blend state changes with different render target formats
1245      */
1246     if(oldFmt != newFmt) {
1247         const GlPixelFormatDesc *glDesc;
1248         const StaticPixelFormatDesc *old = getFormatDescEntry(oldFmt, NULL, NULL);
1249         const StaticPixelFormatDesc *new = getFormatDescEntry(newFmt, &GLINFO_LOCATION, &glDesc);
1250
1251         /* Disable blending when the alphaMask has changed and when a format doesn't support blending */
1252         if((old->alphaMask && !new->alphaMask) || (!old->alphaMask && new->alphaMask) || !(glDesc->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING)) {
1253             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1254         }
1255     }
1256
1257     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
1258         TRACE("Rendering onscreen\n");
1259
1260         context = findThreadContextForSwapChain(swapchain, tid);
1261
1262         This->render_offscreen = FALSE;
1263         /* The context != This->activeContext will catch a NOP context change. This can occur
1264          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
1265          * rendering. No context change is needed in that case
1266          */
1267
1268         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
1269             if(This->pbufferContext && tid == This->pbufferContext->tid) {
1270                 This->pbufferContext->tid = 0;
1271             }
1272         }
1273         IWineD3DSwapChain_Release(swapchain);
1274
1275         if(oldRenderOffscreen) {
1276             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1277             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1278             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1279             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1280             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1281         }
1282
1283     } else {
1284         TRACE("Rendering offscreen\n");
1285         This->render_offscreen = TRUE;
1286
1287         switch(wined3d_settings.offscreen_rendering_mode) {
1288             case ORM_FBO:
1289                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
1290                 if(This->activeContext && tid == This->lastThread) {
1291                     context = This->activeContext;
1292                 } else {
1293                     /* This may happen if the app jumps straight into offscreen rendering
1294                      * Start using the context of the primary swapchain. tid == 0 is no problem
1295                      * for findThreadContextForSwapChain.
1296                      *
1297                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1298                      * is perfect to call.
1299                      */
1300                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1301                 }
1302                 break;
1303
1304             case ORM_PBUFFER:
1305             {
1306                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
1307                 if(This->pbufferContext == NULL ||
1308                    This->pbufferWidth < targetimpl->currentDesc.Width ||
1309                    This->pbufferHeight < targetimpl->currentDesc.Height) {
1310                     if(This->pbufferContext) {
1311                         DestroyContext(This, This->pbufferContext);
1312                     }
1313
1314                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
1315                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
1316                      */
1317                     This->pbufferContext = CreateContext(This, targetimpl,
1318                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
1319                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
1320                     This->pbufferWidth = targetimpl->currentDesc.Width;
1321                     This->pbufferHeight = targetimpl->currentDesc.Height;
1322                    }
1323
1324                    if(This->pbufferContext) {
1325                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
1326                            FIXME("The PBuffr context is only supported for one thread for now!\n");
1327                        }
1328                        This->pbufferContext->tid = tid;
1329                        context = This->pbufferContext;
1330                        break;
1331                    } else {
1332                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
1333                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
1334                    }
1335             }
1336
1337             case ORM_BACKBUFFER:
1338                 /* Stay with the currently active context for back buffer rendering */
1339                 if(This->activeContext && tid == This->lastThread) {
1340                     context = This->activeContext;
1341                 } else {
1342                     /* This may happen if the app jumps straight into offscreen rendering
1343                      * Start using the context of the primary swapchain. tid == 0 is no problem
1344                      * for findThreadContextForSwapChain.
1345                      *
1346                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1347                      * is perfect to call.
1348                      */
1349                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1350                 }
1351                 break;
1352         }
1353
1354         if(!oldRenderOffscreen) {
1355             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1356             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1357             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1358             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1359             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1360         }
1361     }
1362
1363     /* When switching away from an offscreen render target, and we're not using FBOs,
1364      * we have to read the drawable into the texture. This is done via PreLoad(and
1365      * SFLAG_INDRAWABLE set on the surface). There are some things that need care though.
1366      * PreLoad needs a GL context, and FindContext is called before the context is activated.
1367      * It also has to be called with the old rendertarget active, otherwise a wrong drawable
1368      * is read. This leads to these possible situations:
1369      *
1370      * 0) lastActiveRenderTarget == target && oldTid == newTid:
1371      *    Nothing to do, we don't even reach this code in this case...
1372      *
1373      * 1) lastActiveRenderTarget != target && oldTid == newTid:
1374      *    The currently active context is OK for readback. Call PreLoad, and it
1375      *    performs the read
1376      *
1377      * 2) lastActiveRenderTarget == target && oldTid != newTid:
1378      *    Nothing to do - the drawable is unchanged
1379      *
1380      * 3) lastActiveRenderTarget != target && oldTid != newTid:
1381      *    This is tricky. We have to get a context with the old drawable from somewhere
1382      *    before we can switch to the new context. In this case, PreLoad calls
1383      *    ActivateContext(lastActiveRenderTarget) from the new(current) thread. This
1384      *    is case (2) then. The old drawable is activated for the new thread, and the
1385      *    readback can be done. The recursed ActivateContext does *not* call PreLoad again.
1386      *    After that, the outer ActivateContext(which calls PreLoad) can activate the new
1387      *    target for the new thread
1388      */
1389     if (readTexture && This->lastActiveRenderTarget != target) {
1390         BOOL oldInDraw = This->isInDraw;
1391
1392         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
1393          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
1394          * when using offscreen rendering with multithreading
1395          */
1396         This->isInDraw = TRUE;
1397
1398         /* Do that before switching the context:
1399          * Read the back buffer of the old drawable into the destination texture
1400          */
1401         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
1402
1403         /* Assume that the drawable will be modified by some other things now */
1404         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
1405
1406         This->isInDraw = oldInDraw;
1407     }
1408
1409     return context;
1410 }
1411
1412 static void apply_draw_buffer(IWineD3DDeviceImpl *This, IWineD3DSurface *target, BOOL blit)
1413 {
1414     IWineD3DSwapChain *swapchain;
1415
1416     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain)))
1417     {
1418         IWineD3DSwapChain_Release((IUnknown *)swapchain);
1419         glDrawBuffer(surface_get_gl_buffer(target, swapchain));
1420         checkGLcall("glDrawBuffers()");
1421     }
1422     else
1423     {
1424         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1425         {
1426             if (!blit)
1427             {
1428                 if (GL_SUPPORT(ARB_DRAW_BUFFERS))
1429                 {
1430                     GL_EXTCALL(glDrawBuffersARB(GL_LIMITS(buffers), This->draw_buffers));
1431                     checkGLcall("glDrawBuffers()");
1432                 }
1433                 else
1434                 {
1435                     glDrawBuffer(This->draw_buffers[0]);
1436                     checkGLcall("glDrawBuffer()");
1437                 }
1438             } else {
1439                 glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
1440                 checkGLcall("glDrawBuffer()");
1441             }
1442         }
1443         else
1444         {
1445             glDrawBuffer(This->offscreenBuffer);
1446             checkGLcall("glDrawBuffer()");
1447         }
1448     }
1449 }
1450
1451 /*****************************************************************************
1452  * ActivateContext
1453  *
1454  * Finds a rendering context and drawable matching the device and render
1455  * target for the current thread, activates them and puts them into the
1456  * requested state.
1457  *
1458  * Params:
1459  *  This: Device to activate the context for
1460  *  target: Requested render target
1461  *  usage: Prepares the context for blitting, drawing or other actions
1462  *
1463  *****************************************************************************/
1464 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
1465     DWORD                         tid = GetCurrentThreadId();
1466     int                           i;
1467     DWORD                         dirtyState, idx;
1468     BYTE                          shift;
1469     WineD3DContext                *context;
1470     const struct StateEntry       *StateTable = This->StateTable;
1471
1472     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
1473     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
1474         context = FindContext(This, target, tid);
1475         context->draw_buffer_dirty = TRUE;
1476         This->lastActiveRenderTarget = target;
1477         This->lastThread = tid;
1478     } else {
1479         /* Stick to the old context */
1480         context = This->activeContext;
1481     }
1482
1483     /* Activate the opengl context */
1484     if(last_device != This || context != This->activeContext) {
1485         BOOL ret;
1486
1487         /* Prevent an unneeded context switch as those are expensive */
1488         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
1489             TRACE("Already using gl context %p\n", context->glCtx);
1490         }
1491         else {
1492             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
1493
1494             ret = pwglMakeCurrent(context->hdc, context->glCtx);
1495             if(ret == FALSE) {
1496                 ERR("Failed to activate the new context\n");
1497             } else if(!context->last_was_blit) {
1498                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1499             } else {
1500                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1501             }
1502         }
1503         if(This->activeContext->vshader_const_dirty) {
1504             memset(This->activeContext->vshader_const_dirty, 1,
1505                    sizeof(*This->activeContext->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
1506         }
1507         if(This->activeContext->pshader_const_dirty) {
1508             memset(This->activeContext->pshader_const_dirty, 1,
1509                    sizeof(*This->activeContext->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
1510         }
1511         This->activeContext = context;
1512         last_device = This;
1513     }
1514
1515     /* We only need ENTER_GL for the gl calls made below and for the helper functions which make GL calls */
1516     ENTER_GL();
1517
1518     switch (usage) {
1519         case CTXUSAGE_CLEAR:
1520         case CTXUSAGE_DRAWPRIM:
1521             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1522                 context_apply_fbo_state((IWineD3DDevice *)This);
1523             }
1524             if (context->draw_buffer_dirty) {
1525                 apply_draw_buffer(This, target, FALSE);
1526                 context->draw_buffer_dirty = FALSE;
1527             }
1528             break;
1529
1530         case CTXUSAGE_BLIT:
1531             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1532                 if (This->render_offscreen) {
1533                     FIXME("Activating for CTXUSAGE_BLIT for an offscreen target with ORM_FBO. This should be avoided.\n");
1534                     context_bind_fbo((IWineD3DDevice *)This, GL_FRAMEBUFFER_EXT, &context->dst_fbo);
1535                     context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, 0, target);
1536                     GL_EXTCALL(glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, 0));
1537                     checkGLcall("glFramebufferRenderbufferEXT");
1538                 } else {
1539                     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
1540                     checkGLcall("glFramebufferRenderbufferEXT");
1541                 }
1542                 context->draw_buffer_dirty = TRUE;
1543             }
1544             if (context->draw_buffer_dirty) {
1545                 apply_draw_buffer(This, target, TRUE);
1546                 if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
1547                     context->draw_buffer_dirty = FALSE;
1548                 }
1549             }
1550             break;
1551
1552         default:
1553             break;
1554     }
1555
1556     switch(usage) {
1557         case CTXUSAGE_RESOURCELOAD:
1558             /* This does not require any special states to be set up */
1559             break;
1560
1561         case CTXUSAGE_CLEAR:
1562             if(context->last_was_blit) {
1563                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1564             }
1565
1566             /* Blending and clearing should be orthogonal, but tests on the nvidia driver show that disabling
1567              * blending when clearing improves the clearing performance incredibly.
1568              */
1569             glDisable(GL_BLEND);
1570             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1571
1572             glEnable(GL_SCISSOR_TEST);
1573             checkGLcall("glEnable GL_SCISSOR_TEST");
1574             context->last_was_blit = FALSE;
1575             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1576             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1577             break;
1578
1579         case CTXUSAGE_DRAWPRIM:
1580             /* This needs all dirty states applied */
1581             if(context->last_was_blit) {
1582                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1583             }
1584
1585             IWineD3DDeviceImpl_FindTexUnitMap(This);
1586
1587             for(i=0; i < context->numDirtyEntries; i++) {
1588                 dirtyState = context->dirtyArray[i];
1589                 idx = dirtyState >> 5;
1590                 shift = dirtyState & 0x1f;
1591                 context->isStateDirty[idx] &= ~(1 << shift);
1592                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
1593             }
1594             context->numDirtyEntries = 0; /* This makes the whole list clean */
1595             context->last_was_blit = FALSE;
1596             break;
1597
1598         case CTXUSAGE_BLIT:
1599             SetupForBlit(This, context,
1600                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
1601                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
1602             break;
1603
1604         default:
1605             FIXME("Unexpected context usage requested\n");
1606     }
1607     LEAVE_GL();
1608 }