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     /* Call ENTER_GL() once for all gl calls below. In theory we should not call
1060      * helper functions in between gl calls. This function is full of Context_MarkStateDirty
1061      * which can safely be called from here, we only lock once instead locking/unlocking
1062      * after each GL call.
1063      */
1064     ENTER_GL();
1065
1066     /* Disable all textures. The caller can then bind a texture it wants to blit
1067      * from
1068      */
1069     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
1070         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
1071          * function texture unit. No need to care for higher samplers
1072          */
1073         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
1074             sampler = This->rev_tex_unit_map[i];
1075             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
1076             checkGLcall("glActiveTextureARB");
1077
1078             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1079                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1080                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1081             }
1082             glDisable(GL_TEXTURE_3D);
1083             checkGLcall("glDisable GL_TEXTURE_3D");
1084             if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1085                 glDisable(GL_TEXTURE_RECTANGLE_ARB);
1086                 checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1087             }
1088             glDisable(GL_TEXTURE_2D);
1089             checkGLcall("glDisable GL_TEXTURE_2D");
1090
1091             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1092             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
1093
1094             if (sampler != -1) {
1095                 if (sampler < MAX_TEXTURES) {
1096                     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1097                 }
1098                 Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1099             }
1100         }
1101         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
1102         checkGLcall("glActiveTextureARB");
1103     }
1104
1105     sampler = This->rev_tex_unit_map[0];
1106
1107     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
1108         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
1109         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
1110     }
1111     glDisable(GL_TEXTURE_3D);
1112     checkGLcall("glDisable GL_TEXTURE_3D");
1113     if(GL_SUPPORT(ARB_TEXTURE_RECTANGLE)) {
1114         glDisable(GL_TEXTURE_RECTANGLE_ARB);
1115         checkGLcall("glDisable GL_TEXTURE_RECTANGLE_ARB");
1116     }
1117     glDisable(GL_TEXTURE_2D);
1118     checkGLcall("glDisable GL_TEXTURE_2D");
1119
1120     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1121
1122     glMatrixMode(GL_TEXTURE);
1123     checkGLcall("glMatrixMode(GL_TEXTURE)");
1124     glLoadIdentity();
1125     checkGLcall("glLoadIdentity()");
1126
1127     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
1128         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
1129                   GL_TEXTURE_LOD_BIAS_EXT,
1130                   0.0);
1131         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
1132     }
1133
1134     if (sampler != -1) {
1135         if (sampler < MAX_TEXTURES) {
1136             Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0 + sampler), StateTable);
1137             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(sampler, WINED3DTSS_COLOROP), StateTable);
1138         }
1139         Context_MarkStateDirty(context, STATE_SAMPLER(sampler), StateTable);
1140     }
1141
1142     /* Other misc states */
1143     glDisable(GL_ALPHA_TEST);
1144     checkGLcall("glDisable(GL_ALPHA_TEST)");
1145     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE), StateTable);
1146     glDisable(GL_LIGHTING);
1147     checkGLcall("glDisable GL_LIGHTING");
1148     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING), StateTable);
1149     glDisable(GL_DEPTH_TEST);
1150     checkGLcall("glDisable GL_DEPTH_TEST");
1151     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE), StateTable);
1152     glDisable(GL_FOG);
1153     checkGLcall("glDisable GL_FOG");
1154     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE), StateTable);
1155     glDisable(GL_BLEND);
1156     checkGLcall("glDisable GL_BLEND");
1157     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1158     glDisable(GL_CULL_FACE);
1159     checkGLcall("glDisable GL_CULL_FACE");
1160     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE), StateTable);
1161     glDisable(GL_STENCIL_TEST);
1162     checkGLcall("glDisable GL_STENCIL_TEST");
1163     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE), StateTable);
1164     glDisable(GL_SCISSOR_TEST);
1165     checkGLcall("glDisable GL_SCISSOR_TEST");
1166     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1167     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
1168         glDisable(GL_POINT_SPRITE_ARB);
1169         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
1170         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE), StateTable);
1171     }
1172     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
1173     checkGLcall("glColorMask");
1174     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1175     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
1176         glDisable(GL_COLOR_SUM_EXT);
1177         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE), StateTable);
1178         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
1179     }
1180
1181     /* Setup transforms */
1182     glMatrixMode(GL_MODELVIEW);
1183     checkGLcall("glMatrixMode(GL_MODELVIEW)");
1184     glLoadIdentity();
1185     checkGLcall("glLoadIdentity()");
1186     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)), StateTable);
1187
1188     context->last_was_rhw = TRUE;
1189     Context_MarkStateDirty(context, STATE_VDECL, StateTable); /* because of last_was_rhw = TRUE */
1190
1191     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
1192     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
1193     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
1194     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
1195     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
1196     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
1197     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING), StateTable);
1198     LEAVE_GL();
1199
1200     set_blit_dimension(width, height);
1201     context->blit_w = width; context->blit_h = height;
1202     Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1203     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION), StateTable);
1204
1205
1206     This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1207 }
1208
1209 /*****************************************************************************
1210  * findThreadContextForSwapChain
1211  *
1212  * Searches a swapchain for all contexts and picks one for the thread tid.
1213  * If none can be found the swapchain is requested to create a new context
1214  *
1215  *****************************************************************************/
1216 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
1217     int i;
1218
1219     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
1220         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
1221             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
1222         }
1223
1224     }
1225
1226     /* Create a new context for the thread */
1227     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
1228 }
1229
1230 /*****************************************************************************
1231  * FindContext
1232  *
1233  * Finds a context for the current render target and thread
1234  *
1235  * Parameters:
1236  *  target: Render target to find the context for
1237  *  tid: Thread to activate the context for
1238  *
1239  * Returns: The needed context
1240  *
1241  *****************************************************************************/
1242 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
1243     IWineD3DSwapChain *swapchain = NULL;
1244     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
1245     WineD3DContext *context = This->activeContext;
1246     BOOL oldRenderOffscreen = This->render_offscreen;
1247     const WINED3DFORMAT oldFmt = ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->resource.format;
1248     const WINED3DFORMAT newFmt = ((IWineD3DSurfaceImpl *) target)->resource.format;
1249     const struct StateEntry *StateTable = This->StateTable;
1250
1251     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
1252      * the alpha blend state changes with different render target formats
1253      */
1254     if(oldFmt != newFmt) {
1255         const GlPixelFormatDesc *glDesc;
1256         const StaticPixelFormatDesc *old = getFormatDescEntry(oldFmt, NULL, NULL);
1257         const StaticPixelFormatDesc *new = getFormatDescEntry(newFmt, &GLINFO_LOCATION, &glDesc);
1258
1259         /* Disable blending when the alphaMask has changed and when a format doesn't support blending */
1260         if((old->alphaMask && !new->alphaMask) || (!old->alphaMask && new->alphaMask) || !(glDesc->Flags & WINED3DFMT_FLAG_POSTPIXELSHADER_BLENDING)) {
1261             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1262         }
1263     }
1264
1265     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain))) {
1266         TRACE("Rendering onscreen\n");
1267
1268         context = findThreadContextForSwapChain(swapchain, tid);
1269
1270         This->render_offscreen = FALSE;
1271         /* The context != This->activeContext will catch a NOP context change. This can occur
1272          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
1273          * rendering. No context change is needed in that case
1274          */
1275
1276         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
1277             if(This->pbufferContext && tid == This->pbufferContext->tid) {
1278                 This->pbufferContext->tid = 0;
1279             }
1280         }
1281         IWineD3DSwapChain_Release(swapchain);
1282
1283         if(oldRenderOffscreen) {
1284             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1285             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1286             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1287             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1288             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1289         }
1290
1291     } else {
1292         TRACE("Rendering offscreen\n");
1293         This->render_offscreen = TRUE;
1294
1295         switch(wined3d_settings.offscreen_rendering_mode) {
1296             case ORM_FBO:
1297                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
1298                 if(This->activeContext && tid == This->lastThread) {
1299                     context = This->activeContext;
1300                 } else {
1301                     /* This may happen if the app jumps straight into offscreen rendering
1302                      * Start using the context of the primary swapchain. tid == 0 is no problem
1303                      * for findThreadContextForSwapChain.
1304                      *
1305                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1306                      * is perfect to call.
1307                      */
1308                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1309                 }
1310                 break;
1311
1312             case ORM_PBUFFER:
1313             {
1314                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
1315                 if(This->pbufferContext == NULL ||
1316                    This->pbufferWidth < targetimpl->currentDesc.Width ||
1317                    This->pbufferHeight < targetimpl->currentDesc.Height) {
1318                     if(This->pbufferContext) {
1319                         DestroyContext(This, This->pbufferContext);
1320                     }
1321
1322                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
1323                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
1324                      */
1325                     This->pbufferContext = CreateContext(This, targetimpl,
1326                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
1327                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
1328                     This->pbufferWidth = targetimpl->currentDesc.Width;
1329                     This->pbufferHeight = targetimpl->currentDesc.Height;
1330                    }
1331
1332                    if(This->pbufferContext) {
1333                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
1334                            FIXME("The PBuffr context is only supported for one thread for now!\n");
1335                        }
1336                        This->pbufferContext->tid = tid;
1337                        context = This->pbufferContext;
1338                        break;
1339                    } else {
1340                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
1341                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
1342                    }
1343             }
1344
1345             case ORM_BACKBUFFER:
1346                 /* Stay with the currently active context for back buffer rendering */
1347                 if(This->activeContext && tid == This->lastThread) {
1348                     context = This->activeContext;
1349                 } else {
1350                     /* This may happen if the app jumps straight into offscreen rendering
1351                      * Start using the context of the primary swapchain. tid == 0 is no problem
1352                      * for findThreadContextForSwapChain.
1353                      *
1354                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
1355                      * is perfect to call.
1356                      */
1357                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
1358                 }
1359                 break;
1360         }
1361
1362         if(!oldRenderOffscreen) {
1363             Context_MarkStateDirty(context, WINED3DTS_PROJECTION, StateTable);
1364             Context_MarkStateDirty(context, STATE_VDECL, StateTable);
1365             Context_MarkStateDirty(context, STATE_VIEWPORT, StateTable);
1366             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1367             Context_MarkStateDirty(context, STATE_FRONTFACE, StateTable);
1368         }
1369     }
1370
1371     /* When switching away from an offscreen render target, and we're not using FBOs,
1372      * we have to read the drawable into the texture. This is done via PreLoad(and
1373      * SFLAG_INDRAWABLE set on the surface). There are some things that need care though.
1374      * PreLoad needs a GL context, and FindContext is called before the context is activated.
1375      * It also has to be called with the old rendertarget active, otherwise a wrong drawable
1376      * is read. This leads to these possible situations:
1377      *
1378      * 0) lastActiveRenderTarget == target && oldTid == newTid:
1379      *    Nothing to do, we don't even reach this code in this case...
1380      *
1381      * 1) lastActiveRenderTarget != target && oldTid == newTid:
1382      *    The currently active context is OK for readback. Call PreLoad, and it
1383      *    performs the read
1384      *
1385      * 2) lastActiveRenderTarget == target && oldTid != newTid:
1386      *    Nothing to do - the drawable is unchanged
1387      *
1388      * 3) lastActiveRenderTarget != target && oldTid != newTid:
1389      *    This is tricky. We have to get a context with the old drawable from somewhere
1390      *    before we can switch to the new context. In this case, PreLoad calls
1391      *    ActivateContext(lastActiveRenderTarget) from the new(current) thread. This
1392      *    is case (2) then. The old drawable is activated for the new thread, and the
1393      *    readback can be done. The recursed ActivateContext does *not* call PreLoad again.
1394      *    After that, the outer ActivateContext(which calls PreLoad) can activate the new
1395      *    target for the new thread
1396      */
1397     if (readTexture && This->lastActiveRenderTarget != target) {
1398         BOOL oldInDraw = This->isInDraw;
1399
1400         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
1401          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
1402          * when using offscreen rendering with multithreading
1403          */
1404         This->isInDraw = TRUE;
1405
1406         /* Do that before switching the context:
1407          * Read the back buffer of the old drawable into the destination texture
1408          */
1409         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
1410
1411         /* Assume that the drawable will be modified by some other things now */
1412         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
1413
1414         This->isInDraw = oldInDraw;
1415     }
1416
1417     return context;
1418 }
1419
1420 static void apply_draw_buffer(IWineD3DDeviceImpl *This, IWineD3DSurface *target, BOOL blit)
1421 {
1422     IWineD3DSwapChain *swapchain;
1423
1424     if (SUCCEEDED(IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **)&swapchain)))
1425     {
1426         IWineD3DSwapChain_Release((IUnknown *)swapchain);
1427         ENTER_GL();
1428         glDrawBuffer(surface_get_gl_buffer(target, swapchain));
1429         checkGLcall("glDrawBuffers()");
1430         LEAVE_GL();
1431     }
1432     else
1433     {
1434         ENTER_GL();
1435         if (wined3d_settings.offscreen_rendering_mode == ORM_FBO)
1436         {
1437             if (!blit)
1438             {
1439                 if (GL_SUPPORT(ARB_DRAW_BUFFERS))
1440                 {
1441                     GL_EXTCALL(glDrawBuffersARB(GL_LIMITS(buffers), This->draw_buffers));
1442                     checkGLcall("glDrawBuffers()");
1443                 }
1444                 else
1445                 {
1446                     glDrawBuffer(This->draw_buffers[0]);
1447                     checkGLcall("glDrawBuffer()");
1448                 }
1449             } else {
1450                 glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
1451                 checkGLcall("glDrawBuffer()");
1452             }
1453         }
1454         else
1455         {
1456             glDrawBuffer(This->offscreenBuffer);
1457             checkGLcall("glDrawBuffer()");
1458         }
1459         LEAVE_GL();
1460     }
1461 }
1462
1463 /*****************************************************************************
1464  * ActivateContext
1465  *
1466  * Finds a rendering context and drawable matching the device and render
1467  * target for the current thread, activates them and puts them into the
1468  * requested state.
1469  *
1470  * Params:
1471  *  This: Device to activate the context for
1472  *  target: Requested render target
1473  *  usage: Prepares the context for blitting, drawing or other actions
1474  *
1475  *****************************************************************************/
1476 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
1477     DWORD                         tid = GetCurrentThreadId();
1478     int                           i;
1479     DWORD                         dirtyState, idx;
1480     BYTE                          shift;
1481     WineD3DContext                *context;
1482     const struct StateEntry       *StateTable = This->StateTable;
1483
1484     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
1485     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
1486         context = FindContext(This, target, tid);
1487         context->draw_buffer_dirty = TRUE;
1488         This->lastActiveRenderTarget = target;
1489         This->lastThread = tid;
1490     } else {
1491         /* Stick to the old context */
1492         context = This->activeContext;
1493     }
1494
1495     /* Activate the opengl context */
1496     if(last_device != This || context != This->activeContext) {
1497         BOOL ret;
1498
1499         /* Prevent an unneeded context switch as those are expensive */
1500         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
1501             TRACE("Already using gl context %p\n", context->glCtx);
1502         }
1503         else {
1504             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
1505
1506             ret = pwglMakeCurrent(context->hdc, context->glCtx);
1507             if(ret == FALSE) {
1508                 ERR("Failed to activate the new context\n");
1509             } else if(!context->last_was_blit) {
1510                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1511             } else {
1512                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, FALSE);
1513             }
1514         }
1515         if(This->activeContext->vshader_const_dirty) {
1516             memset(This->activeContext->vshader_const_dirty, 1,
1517                    sizeof(*This->activeContext->vshader_const_dirty) * GL_LIMITS(vshader_constantsF));
1518         }
1519         if(This->activeContext->pshader_const_dirty) {
1520             memset(This->activeContext->pshader_const_dirty, 1,
1521                    sizeof(*This->activeContext->pshader_const_dirty) * GL_LIMITS(pshader_constantsF));
1522         }
1523         This->activeContext = context;
1524         last_device = This;
1525     }
1526
1527     switch (usage) {
1528         case CTXUSAGE_CLEAR:
1529         case CTXUSAGE_DRAWPRIM:
1530             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1531                 context_apply_fbo_state((IWineD3DDevice *)This);
1532             }
1533             if (context->draw_buffer_dirty) {
1534                 apply_draw_buffer(This, target, FALSE);
1535                 context->draw_buffer_dirty = FALSE;
1536             }
1537             break;
1538
1539         case CTXUSAGE_BLIT:
1540             if (wined3d_settings.offscreen_rendering_mode == ORM_FBO) {
1541                 if (This->render_offscreen) {
1542                     FIXME("Activating for CTXUSAGE_BLIT for an offscreen target with ORM_FBO. This should be avoided.\n");
1543                     context_bind_fbo((IWineD3DDevice *)This, GL_FRAMEBUFFER_EXT, &context->dst_fbo);
1544                     context_attach_surface_fbo(This, GL_FRAMEBUFFER_EXT, 0, target);
1545
1546                     ENTER_GL();
1547                     GL_EXTCALL(glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, 0));
1548                     checkGLcall("glFramebufferRenderbufferEXT");
1549                     LEAVE_GL();
1550                 } else {
1551                     ENTER_GL();
1552                     GL_EXTCALL(glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0));
1553                     checkGLcall("glFramebufferRenderbufferEXT");
1554                     LEAVE_GL();
1555                 }
1556                 context->draw_buffer_dirty = TRUE;
1557             }
1558             if (context->draw_buffer_dirty) {
1559                 apply_draw_buffer(This, target, TRUE);
1560                 if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
1561                     context->draw_buffer_dirty = FALSE;
1562                 }
1563             }
1564             break;
1565
1566         default:
1567             break;
1568     }
1569
1570     switch(usage) {
1571         case CTXUSAGE_RESOURCELOAD:
1572             /* This does not require any special states to be set up */
1573             break;
1574
1575         case CTXUSAGE_CLEAR:
1576             if(context->last_was_blit) {
1577                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1578             }
1579
1580             /* Blending and clearing should be orthogonal, but tests on the nvidia driver show that disabling
1581              * blending when clearing improves the clearing performance incredibly.
1582              */
1583             ENTER_GL();
1584             glDisable(GL_BLEND);
1585             LEAVE_GL();
1586             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE), StateTable);
1587
1588             ENTER_GL();
1589             glEnable(GL_SCISSOR_TEST);
1590             checkGLcall("glEnable GL_SCISSOR_TEST");
1591             LEAVE_GL();
1592             context->last_was_blit = FALSE;
1593             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE), StateTable);
1594             Context_MarkStateDirty(context, STATE_SCISSORRECT, StateTable);
1595             break;
1596
1597         case CTXUSAGE_DRAWPRIM:
1598             /* This needs all dirty states applied */
1599             if(context->last_was_blit) {
1600                 This->frag_pipe->enable_extension((IWineD3DDevice *) This, TRUE);
1601             }
1602
1603             IWineD3DDeviceImpl_FindTexUnitMap(This);
1604
1605             for(i=0; i < context->numDirtyEntries; i++) {
1606                 dirtyState = context->dirtyArray[i];
1607                 idx = dirtyState >> 5;
1608                 shift = dirtyState & 0x1f;
1609                 context->isStateDirty[idx] &= ~(1 << shift);
1610                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
1611             }
1612             context->numDirtyEntries = 0; /* This makes the whole list clean */
1613             context->last_was_blit = FALSE;
1614             break;
1615
1616         case CTXUSAGE_BLIT:
1617             SetupForBlit(This, context,
1618                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
1619                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
1620             break;
1621
1622         default:
1623             FIXME("Unexpected context usage requested\n");
1624     }
1625 }