dlls/wined3d/context.c

   1 /*
   2  * Context and render target management in wined3d
   3  *
   4  * Copyright 2007 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 /*****************************************************************************
  33  * Context_MarkStateDirty
  34  *
  35  * Marks a state in a context dirty. Only one context, opposed to
  36  * IWineD3DDeviceImpl_MarkStateDirty, which marks the state dirty in all
  37  * contexts
  38  *
  39  * Params:
  40  *  context: Context to mark the state dirty in
  41  *  state: State to mark dirty
  42  *
  43  *****************************************************************************/
  44 static void Context_MarkStateDirty(WineD3DContext *context, DWORD state) {
  45     DWORD rep = StateTable[state].representative;
  46     DWORD idx;
  47     BYTE shift;
  48
  49     if(!rep || isStateDirty(context, rep)) return;
  50
  51     context->dirtyArray[context->numDirtyEntries++] = rep;
  52     idx = rep >> 5;
  53     shift = rep & 0x1f;
  54     context->isStateDirty[idx] |= (1 << shift);
  55 }
  56
  57 /*****************************************************************************
  58  * AddContextToArray
  59  *
  60  * Adds a context to the context array. Helper function for CreateContext
  61  *
  62  * This method is not called in performance-critical code paths, only when a
  63  * new render target or swapchain is created. Thus performance is not an issue
  64  * here.
  65  *
  66  * Params:
  67  *  This: Device to add the context for
  68  *  hdc: device context
  69  *  glCtx: WGL context to add
  70  *  pbuffer: optional pbuffer used with this context
  71  *
  72  *****************************************************************************/
  73 static WineD3DContext *AddContextToArray(IWineD3DDeviceImpl *This, HWND win_handle, HDC hdc, HGLRC glCtx, HPBUFFERARB pbuffer) {
  74     WineD3DContext **oldArray = This->contexts;
  75     DWORD state;
  76
  77     This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * (This->numContexts + 1));
  78     if(This->contexts == NULL) {
  79         ERR("Unable to grow the context array\n");
  80         This->contexts = oldArray;
  81         return NULL;
  82     }
  83     if(oldArray) {
  84         memcpy(This->contexts, oldArray, sizeof(*This->contexts) * This->numContexts);
  85     }
  86
  87     This->contexts[This->numContexts] = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(WineD3DContext));
  88     if(This->contexts[This->numContexts] == NULL) {
  89         ERR("Unable to allocate a new context\n");
  90         HeapFree(GetProcessHeap(), 0, This->contexts);
  91         This->contexts = oldArray;
  92         return NULL;
  93     }
  94
  95     This->contexts[This->numContexts]->hdc = hdc;
  96     This->contexts[This->numContexts]->glCtx = glCtx;
  97     This->contexts[This->numContexts]->pbuffer = pbuffer;
  98     This->contexts[This->numContexts]->win_handle = win_handle;
  99     HeapFree(GetProcessHeap(), 0, oldArray);
 100
 101     /* Mark all states dirty to force a proper initialization of the states on the first use of the context
 102      */
 103     for(state = 0; state <= STATE_HIGHEST; state++) {
 104         Context_MarkStateDirty(This->contexts[This->numContexts], state);
 105     }
 106
 107     This->numContexts++;
 108     TRACE("Created context %p\n", This->contexts[This->numContexts - 1]);
 109     return This->contexts[This->numContexts - 1];
 110 }
 111
 112 /*****************************************************************************
 113  * CreateContext
 114  *
 115  * Creates a new context for a window, or a pbuffer context.
 116  *
 117  * * Params:
 118  *  This: Device to activate the context for
 119  *  target: Surface this context will render to
 120  *  win_handle: handle to the window which we are drawing to
 121  *  create_pbuffer: tells whether to create a pbuffer or not
 122  *  pPresentParameters: contains the pixelformats to use for onscreen rendering
 123  *
 124  *****************************************************************************/
 125 WineD3DContext *CreateContext(IWineD3DDeviceImpl *This, IWineD3DSurfaceImpl *target, HWND win_handle, BOOL create_pbuffer, const WINED3DPRESENT_PARAMETERS *pPresentParms) {
 126     HDC oldDrawable, hdc;
 127     HPBUFFERARB pbuffer = NULL;
 128     HGLRC ctx = NULL, oldCtx;
 129     WineD3DContext *ret = NULL;
 130     int s;
 131
 132     TRACE("(%p): Creating a %s context for render target %p\n", This, create_pbuffer ? "offscreen" : "onscreen", target);
 133
 134     if(create_pbuffer) {
 135         HDC hdc_parent = GetDC(win_handle);
 136         int iPixelFormat = 0;
 137         short red, green, blue, alphaBits, colorBits;
 138         short depthBits, stencilBits;
 139
 140         IWineD3DSurface *StencilSurface = This->stencilBufferTarget;
 141         WINED3DFORMAT StencilBufferFormat = (NULL != StencilSurface) ? ((IWineD3DSurfaceImpl *) StencilSurface)->resource.format : 0;
 142
 143         int attribs[256];
 144         int nAttribs = 0;
 145         unsigned int nFormats;
 146
 147 #define PUSH1(att)        attribs[nAttribs++] = (att);
 148 #define PUSH2(att,value)  attribs[nAttribs++] = (att); attribs[nAttribs++] = (value);
 149
 150         /* Retrieve the specifications for the pixelformat from the backbuffer / stencilbuffer */
 151         getColorBits(target->resource.format, &red, &green, &blue, &alphaBits, &colorBits);
 152         getDepthStencilBits(StencilBufferFormat, &depthBits, &stencilBits);
 153         PUSH2(WGL_DRAW_TO_PBUFFER_ARB, 1); /* We need pbuffer support; doublebuffering isn't needed */
 154         PUSH2(WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB); /* Make sure we don't get a float or color index format */
 155         PUSH2(WGL_COLOR_BITS_ARB, colorBits);
 156         PUSH2(WGL_ALPHA_BITS_ARB, alphaBits);
 157         PUSH2(WGL_DEPTH_BITS_ARB, depthBits);
 158         PUSH2(WGL_STENCIL_BITS_ARB, stencilBits);
 159         PUSH1(0); /* end the list */
 160
 161 #undef PUSH1
 162 #undef PUSH2
 163
 164         /* Try to find a pixelformat that matches exactly. If that fails let ChoosePixelFormat try to find a close match */
 165         if(!GL_EXTCALL(wglChoosePixelFormatARB(hdc_parent, (const int*)&attribs, NULL, 1, &iPixelFormat, &nFormats)))
 166         {
 167             PIXELFORMATDESCRIPTOR pfd;
 168
 169             TRACE("Falling back to ChoosePixelFormat as wglChoosePixelFormatARB failed\n");
 170
 171             ZeroMemory(&pfd, sizeof(pfd));
 172             pfd.nSize      = sizeof(pfd);
 173             pfd.nVersion   = 1;
 174             pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER_DONTCARE | PFD_DRAW_TO_WINDOW;
 175             pfd.iPixelType = PFD_TYPE_RGBA;
 176             pfd.cColorBits = colorBits;
 177             pfd.cDepthBits = depthBits;
 178             pfd.cStencilBits = stencilBits;
 179             pfd.iLayerType = PFD_MAIN_PLANE;
 180
 181             iPixelFormat = ChoosePixelFormat(hdc_parent, &pfd);
 182             if(!iPixelFormat) {
 183                 /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 184                 ERR("Can't find a suitable iPixelFormat for the pbuffer\n");
 185             }
 186         }
 187
 188         TRACE("Creating a pBuffer drawable for the new context\n");
 189         pbuffer = GL_EXTCALL(wglCreatePbufferARB(hdc_parent, iPixelFormat, target->currentDesc.Width, target->currentDesc.Height, 0));
 190         if(!pbuffer) {
 191             ERR("Cannot create a pbuffer\n");
 192             ReleaseDC(win_handle, hdc_parent);
 193             goto out;
 194         }
 195
 196         /* In WGL a pbuffer is 'wrapped' inside a HDC to 'fool' wglMakeCurrent */
 197         hdc = GL_EXTCALL(wglGetPbufferDCARB(pbuffer));
 198         if(!hdc) {
 199             ERR("Cannot get a HDC for pbuffer (%p)\n", pbuffer);
 200             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 201             ReleaseDC(win_handle, hdc_parent);
 202             goto out;
 203         }
 204         ReleaseDC(win_handle, hdc_parent);
 205     } else {
 206         PIXELFORMATDESCRIPTOR pfd;
 207         int iPixelFormat;
 208         short red, green, blue, alpha;
 209         short colorBits;
 210         short depthBits, stencilBits;
 211         int res;
 212
 213         hdc = GetDC(win_handle);
 214         if(hdc == NULL) {
 215             ERR("Cannot retrieve a device context!\n");
 216             goto out;
 217         }
 218
 219         /* PixelFormat selection */
 220         /* TODO: fill cColorBits/cDepthBits with target->resource.format */
 221         ZeroMemory(&pfd, sizeof(pfd));
 222         pfd.nSize      = sizeof(pfd);
 223         pfd.nVersion   = 1;
 224         pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 225         pfd.iPixelType = PFD_TYPE_RGBA;
 226         pfd.cColorBits = 32;
 227         pfd.cDepthBits = 0;
 228         pfd.cStencilBits = 0;
 229         pfd.iLayerType = PFD_MAIN_PLANE;
 230
 231         /* Try to match the colorBits of the d3d format */
 232         if(getColorBits(target->resource.format, &red, &green, &blue, &alpha, &colorBits))
 233             pfd.cColorBits = colorBits;
 234
 235         /* Retrieve the depth stencil format from the present parameters.
 236          * The choice of the proper format can give a nice performance boost
 237          * in case of GPU limited programs. */
 238         if(pPresentParms->EnableAutoDepthStencil) {
 239             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 240             if(getDepthStencilBits(pPresentParms->AutoDepthStencilFormat, &depthBits, &stencilBits)) {
 241                 pfd.cDepthBits = depthBits;
 242                 pfd.cStencilBits = stencilBits;
 243             }
 244         }
 245
 246         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 247         if(!iPixelFormat) {
 248             /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 249             ERR("Can't find a suitable iPixelFormat\n");
 250         }
 251
 252         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 253         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 254         if(!res) {
 255             int oldPixelFormat = GetPixelFormat(hdc);
 256
 257             if(oldPixelFormat) {
 258                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 259                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 260                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 261             }
 262             else {
 263                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 264                 return FALSE;
 265             }
 266         }
 267     }
 268
 269     ctx = wglCreateContext(hdc);
 270     if(This->numContexts) wglShareLists(This->contexts[0]->glCtx, ctx);
 271
 272     if(!ctx) {
 273         ERR("Failed to create a WGL context\n");
 274         if(create_pbuffer) {
 275             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 276             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 277         }
 278         goto out;
 279     }
 280     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 281     if(!ret) {
 282         ERR("Failed to add the newly created context to the context list\n");
 283         wglDeleteContext(ctx);
 284         if(create_pbuffer) {
 285             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 286             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 287         }
 288         goto out;
 289     }
 290     ret->surface = (IWineD3DSurface *) target;
 291     ret->isPBuffer = create_pbuffer;
 292     ret->tid = GetCurrentThreadId();
 293
 294     TRACE("Successfully created new context %p\n", ret);
 295
 296     /* Set up the context defaults */
 297     oldCtx  = wglGetCurrentContext();
 298     oldDrawable = wglGetCurrentDC();
 299     if(wglMakeCurrent(hdc, ctx) == FALSE) {
 300         ERR("Cannot activate context to set up defaults\n");
 301         goto out;
 302     }
 303
 304     TRACE("Setting up the screen\n");
 305     /* Clear the screen */
 306     glClearColor(1.0, 0.0, 0.0, 0.0);
 307     checkGLcall("glClearColor");
 308     glClearIndex(0);
 309     glClearDepth(1);
 310     glClearStencil(0xffff);
 311
 312     checkGLcall("glClear");
 313
 314     glColor3f(1.0, 1.0, 1.0);
 315     checkGLcall("glColor3f");
 316
 317     glEnable(GL_LIGHTING);
 318     checkGLcall("glEnable");
 319
 320     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 321     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 322
 323     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 324     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 325
 326     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 327     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 328
 329     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 330     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 331     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 332     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 333
 334     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 335         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 336          * and textures in DIB sections(due to the memory protection).
 337          */
 338         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 339         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 340     }
 341     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 342         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 343          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 344          * GL_VERTEX_BLEND_ARB isn't enabled too
 345          */
 346         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 347         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 348     }
 349     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 350         glEnable(GL_TEXTURE_SHADER_NV);
 351         checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 352
 353         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 354          * the previous texture where to source the offset from is always unit - 1.
 355          */
 356         for(s = 1; s < GL_LIMITS(textures); s++) {
 357             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 358             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 359             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 360         }
 361     }
 362     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 363         for(s = 0; s < GL_LIMITS(textures); s++) {
 364             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 365             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 366             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 367         }
 368     }
 369
 370     if(oldDrawable && oldCtx) {
 371         wglMakeCurrent(oldDrawable, oldCtx);
 372     }
 373
 374 out:
 375     return ret;
 376 }
 377
 378 /*****************************************************************************
 379  * RemoveContextFromArray
 380  *
 381  * Removes a context from the context manager. The opengl context is not
 382  * destroyed or unset. context is not a valid pointer after that call.
 383  *
 384  * Similar to the former call this isn't a performance critical function. A
 385  * helper function for DestroyContext.
 386  *
 387  * Params:
 388  *  This: Device to activate the context for
 389  *  context: Context to remove
 390  *
 391  *****************************************************************************/
 392 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 393     UINT t, s;
 394     WineD3DContext **oldArray = This->contexts;
 395
 396     TRACE("Removing ctx %p\n", context);
 397
 398     This->numContexts--;
 399
 400     if(This->numContexts) {
 401         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 402         if(!This->contexts) {
 403             ERR("Cannot allocate a new context array, PANIC!!!\n");
 404         }
 405         t = 0;
 406         for(s = 0; s < This->numContexts; s++) {
 407             if(oldArray[s] == context) continue;
 408             This->contexts[t] = oldArray[s];
 409             t++;
 410         }
 411     } else {
 412         This->contexts = NULL;
 413     }
 414
 415     HeapFree(GetProcessHeap(), 0, context);
 416     HeapFree(GetProcessHeap(), 0, oldArray);
 417 }
 418
 419 /*****************************************************************************
 420  * DestroyContext
 421  *
 422  * Destroys a wineD3DContext
 423  *
 424  * Params:
 425  *  This: Device to activate the context for
 426  *  context: Context to destroy
 427  *
 428  *****************************************************************************/
 429 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 430
 431     /* check that we are the current context first */
 432     TRACE("Destroying ctx %p\n", context);
 433     if(wglGetCurrentContext() == context->glCtx){
 434         wglMakeCurrent(NULL, NULL);
 435     }
 436
 437     if(context->isPBuffer) {
 438         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 439         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 440     } else ReleaseDC(context->win_handle, context->hdc);
 441     wglDeleteContext(context->glCtx);
 442
 443     RemoveContextFromArray(This, context);
 444 }
 445
 446 /*****************************************************************************
 447  * SetupForBlit
 448  *
 449  * Sets up a context for DirectDraw blitting.
 450  * All texture units are disabled, except unit 0
 451  * Texture unit 0 is activted where GL_TEXTURE_2D is activated
 452  * fog, lighting, blending, alpha test, z test, scissor test, culling diabled
 453  * color writing enabled for all channels
 454  * register combiners disabled, shaders disabled
 455  * world matris is set to identity, texture matrix 0 too
 456  * projection matrix is setup for drawing screen coordinates
 457  *
 458  * Params:
 459  *  This: Device to activate the context for
 460  *  context: Context to setup
 461  *  width: render target width
 462  *  height: render target height
 463  *
 464  *****************************************************************************/
 465 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
 466     int i;
 467
 468     TRACE("Setting up context %p for blitting\n", context);
 469     if(context->last_was_blit) {
 470         TRACE("Context is already set up for blitting, nothing to do\n");
 471         return;
 472     }
 473     context->last_was_blit = TRUE;
 474
 475     /* TODO: Use a display list */
 476
 477     /* Disable shaders */
 478     This->shader_backend->shader_cleanup((IWineD3DDevice *) This);
 479     Context_MarkStateDirty(context, STATE_VSHADER);
 480     Context_MarkStateDirty(context, STATE_PIXELSHADER);
 481
 482     /* Disable all textures. The caller can then bind a texture it wants to blit
 483      * from
 484      */
 485     if(GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 486         glDisable(GL_REGISTER_COMBINERS_NV);
 487         checkGLcall("glDisable(GL_REGISTER_COMBINERS_NV)");
 488     }
 489     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
 490         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
 491          * function texture unit. No need to care for higher samplers
 492          */
 493         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
 494             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
 495             checkGLcall("glActiveTextureARB");
 496
 497             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 498                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 499                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 500             }
 501             glDisable(GL_TEXTURE_3D);
 502             checkGLcall("glDisable GL_TEXTURE_3D");
 503             glDisable(GL_TEXTURE_2D);
 504             checkGLcall("glDisable GL_TEXTURE_2D");
 505
 506             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 507             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
 508
 509             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(i, WINED3DTSS_COLOROP));
 510             Context_MarkStateDirty(context, STATE_SAMPLER(i));
 511         }
 512         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
 513         checkGLcall("glActiveTextureARB");
 514     }
 515     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 516         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 517         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 518     }
 519     glDisable(GL_TEXTURE_3D);
 520     checkGLcall("glDisable GL_TEXTURE_3D");
 521     glEnable(GL_TEXTURE_2D);
 522     checkGLcall("glEnable GL_TEXTURE_2D");
 523
 524     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 525
 526     glMatrixMode(GL_TEXTURE);
 527     checkGLcall("glMatrixMode(GL_TEXTURE)");
 528     glLoadIdentity();
 529     checkGLcall("glLoadIdentity()");
 530     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0));
 531
 532     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
 533         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 534                   GL_TEXTURE_LOD_BIAS_EXT,
 535                   0.0);
 536         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
 537     }
 538     Context_MarkStateDirty(context, STATE_SAMPLER(0));
 539     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(0, WINED3DTSS_COLOROP));
 540
 541     /* Other misc states */
 542     glDisable(GL_ALPHA_TEST);
 543     checkGLcall("glDisable(GL_ALPHA_TEST)");
 544     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE));
 545     glDisable(GL_LIGHTING);
 546     checkGLcall("glDisable GL_LIGHTING");
 547     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING));
 548     glDisable(GL_DEPTH_TEST);
 549     checkGLcall("glDisable GL_DEPTH_TEST");
 550     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE));
 551     glDisable(GL_FOG);
 552     checkGLcall("glDisable GL_FOG");
 553     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE));
 554     glDisable(GL_BLEND);
 555     checkGLcall("glDisable GL_BLEND");
 556     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 557     glDisable(GL_CULL_FACE);
 558     checkGLcall("glDisable GL_CULL_FACE");
 559     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE));
 560     glDisable(GL_STENCIL_TEST);
 561     checkGLcall("glDisable GL_STENCIL_TEST");
 562     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE));
 563     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 564         glDisable(GL_POINT_SPRITE_ARB);
 565         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
 566         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE));
 567     }
 568     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
 569     checkGLcall("glColorMask");
 570     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 571
 572     /* Setup transforms */
 573     glMatrixMode(GL_MODELVIEW);
 574     checkGLcall("glMatrixMode(GL_MODELVIEW)");
 575     glLoadIdentity();
 576     checkGLcall("glLoadIdentity()");
 577     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)));
 578
 579     glMatrixMode(GL_PROJECTION);
 580     checkGLcall("glMatrixMode(GL_PROJECTION)");
 581     glLoadIdentity();
 582     checkGLcall("glLoadIdentity()");
 583     glOrtho(0, width, height, 0, 0.0, -1.0);
 584     checkGLcall("glOrtho");
 585     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
 586
 587     context->last_was_rhw = TRUE;
 588     Context_MarkStateDirty(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
 589
 590     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
 591     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
 592     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
 593     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
 594     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
 595     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
 596     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 597
 598     glViewport(0, 0, width, height);
 599     checkGLcall("glViewport");
 600     Context_MarkStateDirty(context, STATE_VIEWPORT);
 601
 602     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 603         glDisable(GL_TEXTURE_SHADER_NV);
 604         checkGLcall("glDisable(GL_TEXTURE_SHADER_NV)");
 605     }
 606 }
 607
 608 /*****************************************************************************
 609  * findThreadContextForSwapChain
 610  *
 611  * Searches a swapchain for all contexts and picks one for the thread tid.
 612  * If none can be found the swapchain is requested to create a new context
 613  *
 614  *****************************************************************************/
 615 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
 616     int i;
 617
 618     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
 619         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
 620             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
 621         }
 622
 623     }
 624
 625     /* Create a new context for the thread */
 626     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
 627 }
 628
 629 /*****************************************************************************
 630  * FindContext
 631  *
 632  * Finds a context for the current render target and thread
 633  *
 634  * Parameters:
 635  *  target: Render target to find the context for
 636  *  tid: Thread to activate the context for
 637  *
 638  * Returns: The needed context
 639  *
 640  *****************************************************************************/
 641 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
 642     IWineD3DSwapChain *swapchain = NULL;
 643     HRESULT hr;
 644     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
 645     WineD3DContext *context = This->activeContext;
 646     BOOL oldRenderOffscreen = This->render_offscreen;
 647
 648     hr = IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **) &swapchain);
 649     if(hr == WINED3D_OK && swapchain) {
 650         TRACE("Rendering onscreen\n");
 651
 652         context = findThreadContextForSwapChain(swapchain, tid);
 653
 654         This->render_offscreen = FALSE;
 655         /* The context != This->activeContext will catch a NOP context change. This can occur
 656          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
 657          * rendering. No context change is needed in that case
 658          */
 659
 660         if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 661             if(((IWineD3DSwapChainImpl *) swapchain)->backBuffer) {
 662                 glDrawBuffer(GL_BACK);
 663                 checkGLcall("glDrawBuffer(GL_BACK)");
 664             } else {
 665                 glDrawBuffer(GL_FRONT);
 666                 checkGLcall("glDrawBuffer(GL_FRONT)");
 667             }
 668         } else if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
 669             if(This->pbufferContext && tid == This->pbufferContext->tid) {
 670                 This->pbufferContext->tid = 0;
 671             }
 672         }
 673         IWineD3DSwapChain_Release(swapchain);
 674
 675         if(oldRenderOffscreen) {
 676             Context_MarkStateDirty(context, WINED3DRS_CULLMODE);
 677             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 678             Context_MarkStateDirty(context, STATE_VDECL);
 679             Context_MarkStateDirty(context, STATE_VIEWPORT);
 680             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 681         }
 682
 683     } else {
 684         TRACE("Rendering offscreen\n");
 685         This->render_offscreen = TRUE;
 686
 687         switch(wined3d_settings.offscreen_rendering_mode) {
 688             case ORM_FBO:
 689                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
 690                 if(This->activeContext && tid == This->lastThread) {
 691                     context = This->activeContext;
 692                 } else {
 693                     /* This may happen if the app jumps streight into offscreen rendering
 694                      * Start using the context of the primary swapchain. tid == 0 is no problem
 695                      * for findThreadContextForSwapChain.
 696                      *
 697                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 698                      * is perfect to call.
 699                      */
 700                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 701                 }
 702                 break;
 703
 704             case ORM_PBUFFER:
 705             {
 706                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
 707                 if(This->pbufferContext == NULL ||
 708                    This->pbufferWidth < targetimpl->currentDesc.Width ||
 709                    This->pbufferHeight < targetimpl->currentDesc.Height) {
 710                     if(This->pbufferContext) {
 711                         DestroyContext(This, This->pbufferContext);
 712                     }
 713
 714                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
 715                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
 716                      */
 717                     This->pbufferContext = CreateContext(This, targetimpl,
 718                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
 719                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
 720                     This->pbufferWidth = targetimpl->currentDesc.Width;
 721                     This->pbufferHeight = targetimpl->currentDesc.Height;
 722                    }
 723
 724                    if(This->pbufferContext) {
 725                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
 726                            FIXME("The PBuffr context is only supported for one thread for now!\n");
 727                        }
 728                        This->pbufferContext->tid = tid;
 729                        context = This->pbufferContext;
 730                        break;
 731                    } else {
 732                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
 733                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
 734                    }
 735             }
 736
 737             case ORM_BACKBUFFER:
 738                 /* Stay with the currently active context for back buffer rendering */
 739                 if(This->activeContext && tid == This->lastThread) {
 740                     context = This->activeContext;
 741                 } else {
 742                     /* This may happen if the app jumps streight into offscreen rendering
 743                      * Start using the context of the primary swapchain. tid == 0 is no problem
 744                      * for findThreadContextForSwapChain.
 745                      *
 746                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 747                      * is perfect to call.
 748                      */
 749                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 750                 }
 751                 glDrawBuffer(This->offscreenBuffer);
 752                 checkGLcall("glDrawBuffer(This->offscreenBuffer)");
 753                 break;
 754         }
 755
 756         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
 757             /* Make sure we have a OpenGL texture name so the PreLoad() used to read the buffer
 758              * back when we are done won't mark us dirty.
 759              */
 760             IWineD3DSurface_PreLoad(target);
 761         }
 762
 763         if(!oldRenderOffscreen) {
 764             Context_MarkStateDirty(context, WINED3DRS_CULLMODE);
 765             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 766             Context_MarkStateDirty(context, STATE_VDECL);
 767             Context_MarkStateDirty(context, STATE_VIEWPORT);
 768             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 769         }
 770     }
 771     if (readTexture) {
 772         BOOL oldInDraw = This->isInDraw;
 773
 774         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
 775          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
 776          * when using offscreen rendering with multithreading
 777          */
 778         This->isInDraw = TRUE;
 779
 780         /* Do that before switching the context:
 781          * Read the back buffer of the old drawable into the destination texture
 782          */
 783         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
 784
 785         /* Assume that the drawable will be modified by some other things now */
 786         ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->Flags &= ~SFLAG_INDRAWABLE;
 787
 788         This->isInDraw = oldInDraw;
 789     }
 790
 791     if(oldRenderOffscreen != This->render_offscreen && This->depth_copy_state != WINED3D_DCS_NO_COPY) {
 792         This->depth_copy_state = WINED3D_DCS_COPY;
 793     }
 794     return context;
 795 }
 796
 797 /*****************************************************************************
 798  * ActivateContext
 799  *
 800  * Finds a rendering context and drawable matching the device and render
 801  * target for the current thread, activates them and puts them into the
 802  * requested state.
 803  *
 804  * Params:
 805  *  This: Device to activate the context for
 806  *  target: Requested render target
 807  *  usage: Prepares the context for blitting, drawing or other actions
 808  *
 809  *****************************************************************************/
 810 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
 811     DWORD                         tid = GetCurrentThreadId();
 812     int                           i;
 813     DWORD                         dirtyState, idx;
 814     BYTE                          shift;
 815     WineD3DContext                *context;
 816
 817     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
 818
 819     ENTER_GL();
 820     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
 821         context = FindContext(This, target, tid);
 822         This->lastActiveRenderTarget = target;
 823         This->lastThread = tid;
 824     } else {
 825         /* Stick to the old context */
 826         context = This->activeContext;
 827     }
 828
 829     /* Activate the opengl context */
 830     if(context != This->activeContext) {
 831         BOOL ret;
 832         TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
 833         LEAVE_GL();
 834         ret = wglMakeCurrent(context->hdc, context->glCtx);
 835         ENTER_GL();
 836         if(ret == FALSE) {
 837             ERR("Failed to activate the new context\n");
 838         }
 839         This->activeContext = context;
 840     }
 841
 842     switch(usage) {
 843         case CTXUSAGE_RESOURCELOAD:
 844             /* This does not require any special states to be set up */
 845             break;
 846
 847         case CTXUSAGE_CLEAR:
 848             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 849                 glEnable(GL_TEXTURE_SHADER_NV);
 850                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 851             }
 852
 853             glEnable(GL_SCISSOR_TEST);
 854             checkGLcall("glEnable GL_SCISSOR_TEST");
 855             context->last_was_blit = FALSE;
 856             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 857             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 858             break;
 859
 860         case CTXUSAGE_DRAWPRIM:
 861             /* This needs all dirty states applied */
 862             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 863                 glEnable(GL_TEXTURE_SHADER_NV);
 864                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 865             }
 866
 867             IWineD3DDeviceImpl_FindTexUnitMap(This);
 868
 869             for(i=0; i < context->numDirtyEntries; i++) {
 870                 dirtyState = context->dirtyArray[i];
 871                 idx = dirtyState >> 5;
 872                 shift = dirtyState & 0x1f;
 873                 context->isStateDirty[idx] &= ~(1 << shift);
 874                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
 875             }
 876             context->numDirtyEntries = 0; /* This makes the whole list clean */
 877             context->last_was_blit = FALSE;
 878             break;
 879
 880         case CTXUSAGE_BLIT:
 881             SetupForBlit(This, context,
 882                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
 883                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
 884             break;
 885
 886         default:
 887             FIXME("Unexpected context usage requested\n");
 888     }
 889     LEAVE_GL();
 890 }