git.oblomov.eu Git - wine/blob - 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 #define PUSH1(att)        attribs[nAttribs++] = (att);
 135 #define PUSH2(att,value)  attribs[nAttribs++] = (att); attribs[nAttribs++] = (value);
 136     if(create_pbuffer) {
 137         HDC hdc_parent = GetDC(win_handle);
 138         int iPixelFormat = 0;
 139         short redBits, greenBits, blueBits, alphaBits, colorBits;
 140         short depthBits, stencilBits;
 141
 142         IWineD3DSurface *StencilSurface = This->stencilBufferTarget;
 143         WINED3DFORMAT StencilBufferFormat = (NULL != StencilSurface) ? ((IWineD3DSurfaceImpl *) StencilSurface)->resource.format : 0;
 144
 145         int attribs[256];
 146         int nAttribs = 0;
 147         unsigned int nFormats;
 148
 149         /* Retrieve the specifications for the pixelformat from the backbuffer / stencilbuffer */
 150         getColorBits(target->resource.format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits);
 151         getDepthStencilBits(StencilBufferFormat, &depthBits, &stencilBits);
 152         PUSH2(WGL_DRAW_TO_PBUFFER_ARB, 1); /* We need pbuffer support; doublebuffering isn't needed */
 153         PUSH2(WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB); /* Make sure we don't get a float or color index format */
 154         PUSH2(WGL_COLOR_BITS_ARB, colorBits);
 155         PUSH2(WGL_RED_BITS_ARB, redBits);
 156         PUSH2(WGL_GREEN_BITS_ARB, greenBits);
 157         PUSH2(WGL_BLUE_BITS_ARB, blueBits);
 158         PUSH2(WGL_ALPHA_BITS_ARB, alphaBits);
 159         PUSH2(WGL_DEPTH_BITS_ARB, depthBits);
 160         PUSH2(WGL_STENCIL_BITS_ARB, stencilBits);
 161         PUSH1(0); /* end the list */
 162
 163         /* Try to find a pixelformat that matches exactly. If that fails let ChoosePixelFormat try to find a close match */
 164         if(!GL_EXTCALL(wglChoosePixelFormatARB(hdc_parent, (const int*)&attribs, NULL, 1, &iPixelFormat, &nFormats)))
 165         {
 166             PIXELFORMATDESCRIPTOR pfd;
 167
 168             TRACE("Falling back to ChoosePixelFormat as wglChoosePixelFormatARB failed\n");
 169
 170             ZeroMemory(&pfd, sizeof(pfd));
 171             pfd.nSize      = sizeof(pfd);
 172             pfd.nVersion   = 1;
 173             pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER_DONTCARE | PFD_DRAW_TO_WINDOW;
 174             pfd.iPixelType = PFD_TYPE_RGBA;
 175             pfd.cColorBits = colorBits;
 176             pfd.cDepthBits = depthBits;
 177             pfd.cStencilBits = stencilBits;
 178             pfd.iLayerType = PFD_MAIN_PLANE;
 179
 180             iPixelFormat = ChoosePixelFormat(hdc_parent, &pfd);
 181             if(!iPixelFormat) {
 182                 /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 183                 ERR("Can't find a suitable iPixelFormat for the pbuffer\n");
 184             }
 185         }
 186
 187         TRACE("Creating a pBuffer drawable for the new context\n");
 188         pbuffer = GL_EXTCALL(wglCreatePbufferARB(hdc_parent, iPixelFormat, target->currentDesc.Width, target->currentDesc.Height, 0));
 189         if(!pbuffer) {
 190             ERR("Cannot create a pbuffer\n");
 191             ReleaseDC(win_handle, hdc_parent);
 192             goto out;
 193         }
 194
 195         /* In WGL a pbuffer is 'wrapped' inside a HDC to 'fool' wglMakeCurrent */
 196         hdc = GL_EXTCALL(wglGetPbufferDCARB(pbuffer));
 197         if(!hdc) {
 198             ERR("Cannot get a HDC for pbuffer (%p)\n", pbuffer);
 199             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 200             ReleaseDC(win_handle, hdc_parent);
 201             goto out;
 202         }
 203         ReleaseDC(win_handle, hdc_parent);
 204     } else {
 205         PIXELFORMATDESCRIPTOR pfd;
 206         int iPixelFormat;
 207         short redBits, greenBits, blueBits, alphaBits, colorBits;
 208         short depthBits=0, stencilBits=0;
 209         int res;
 210         int attribs[256];
 211         int nAttribs = 0;
 212         unsigned int nFormats;
 213
 214         hdc = GetDC(win_handle);
 215         if(hdc == NULL) {
 216             ERR("Cannot retrieve a device context!\n");
 217             goto out;
 218         }
 219
 220         /* PixelFormat selection */
 221         PUSH2(WGL_DRAW_TO_WINDOW_ARB, GL_TRUE); /* We want to draw to a window */
 222         PUSH2(WGL_DOUBLE_BUFFER_ARB, GL_TRUE);
 223         PUSH2(WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB); /* Make sure we don't get a float or color index format */
 224
 225         if(!getColorBits(target->resource.format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
 226             ERR("Unable to get color bits for format %#x!\n", target->resource.format);
 227             return FALSE;
 228         }
 229         PUSH2(WGL_COLOR_BITS_ARB, colorBits);
 230         PUSH2(WGL_RED_BITS_ARB, redBits);
 231         PUSH2(WGL_GREEN_BITS_ARB, greenBits);
 232         PUSH2(WGL_BLUE_BITS_ARB, blueBits);
 233         PUSH2(WGL_ALPHA_BITS_ARB, alphaBits);
 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                 ERR("Unable to get depth / stencil bits for AutoDepthStencilFormat %#x!\n", pPresentParms->AutoDepthStencilFormat);
 242                 return FALSE;
 243             }
 244             PUSH2(WGL_DEPTH_BITS_ARB, depthBits);
 245             PUSH2(WGL_STENCIL_BITS_ARB, stencilBits);
 246         }
 247
 248         PUSH1(0); /* end the list */
 249         iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 250
 251         /* In case of failure hope that standard ChooosePixelFormat will find something suitable */
 252         if(!GL_EXTCALL(wglChoosePixelFormatARB(hdc, (const int*)&attribs, NULL, 1, &iPixelFormat, &nFormats)))
 253         {
 254             /* PixelFormat selection */
 255             ZeroMemory(&pfd, sizeof(pfd));
 256             pfd.nSize      = sizeof(pfd);
 257             pfd.nVersion   = 1;
 258             pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 259             pfd.iPixelType = PFD_TYPE_RGBA;
 260             pfd.cAlphaBits = alphaBits;
 261             pfd.cColorBits = colorBits;
 262             pfd.cDepthBits = depthBits;
 263             pfd.cStencilBits = stencilBits;
 264             pfd.iLayerType = PFD_MAIN_PLANE;
 265
 266             iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 267             if(!iPixelFormat) {
 268                 /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 269                 ERR("Can't find a suitable iPixelFormat\n");
 270             }
 271         }
 272
 273         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 274         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 275         if(!res) {
 276             int oldPixelFormat = GetPixelFormat(hdc);
 277
 278             if(oldPixelFormat) {
 279                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 280                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 281                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 282             }
 283             else {
 284                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 285                 return FALSE;
 286             }
 287         }
 288     }
 289 #undef PUSH1
 290 #undef PUSH2
 291
 292     ctx = pwglCreateContext(hdc);
 293     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 294
 295     if(!ctx) {
 296         ERR("Failed to create a WGL context\n");
 297         if(create_pbuffer) {
 298             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 299             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 300         }
 301         goto out;
 302     }
 303     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 304     if(!ret) {
 305         ERR("Failed to add the newly created context to the context list\n");
 306         pwglDeleteContext(ctx);
 307         if(create_pbuffer) {
 308             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 309             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 310         }
 311         goto out;
 312     }
 313     ret->surface = (IWineD3DSurface *) target;
 314     ret->isPBuffer = create_pbuffer;
 315     ret->tid = GetCurrentThreadId();
 316
 317     TRACE("Successfully created new context %p\n", ret);
 318
 319     /* Set up the context defaults */
 320     oldCtx  = pwglGetCurrentContext();
 321     oldDrawable = pwglGetCurrentDC();
 322     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 323         ERR("Cannot activate context to set up defaults\n");
 324         goto out;
 325     }
 326
 327     TRACE("Setting up the screen\n");
 328     /* Clear the screen */
 329     glClearColor(1.0, 0.0, 0.0, 0.0);
 330     checkGLcall("glClearColor");
 331     glClearIndex(0);
 332     glClearDepth(1);
 333     glClearStencil(0xffff);
 334
 335     checkGLcall("glClear");
 336
 337     glColor3f(1.0, 1.0, 1.0);
 338     checkGLcall("glColor3f");
 339
 340     glEnable(GL_LIGHTING);
 341     checkGLcall("glEnable");
 342
 343     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 344     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 345
 346     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 347     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 348
 349     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 350     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 351
 352     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 353     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 354     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 355     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 356
 357     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 358         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 359          * and textures in DIB sections(due to the memory protection).
 360          */
 361         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 362         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 363     }
 364     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 365         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 366          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 367          * GL_VERTEX_BLEND_ARB isn't enabled too
 368          */
 369         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 370         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 371     }
 372     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 373         glEnable(GL_TEXTURE_SHADER_NV);
 374         checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 375
 376         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 377          * the previous texture where to source the offset from is always unit - 1.
 378          */
 379         for(s = 1; s < GL_LIMITS(textures); s++) {
 380             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 381             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 382             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 383         }
 384     }
 385     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 386         for(s = 0; s < GL_LIMITS(textures); s++) {
 387             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 388             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 389             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 390         }
 391     }
 392
 393     if(oldDrawable && oldCtx) {
 394         pwglMakeCurrent(oldDrawable, oldCtx);
 395     }
 396
 397 out:
 398     return ret;
 399 }
 400
 401 /*****************************************************************************
 402  * RemoveContextFromArray
 403  *
 404  * Removes a context from the context manager. The opengl context is not
 405  * destroyed or unset. context is not a valid pointer after that call.
 406  *
 407  * Similar to the former call this isn't a performance critical function. A
 408  * helper function for DestroyContext.
 409  *
 410  * Params:
 411  *  This: Device to activate the context for
 412  *  context: Context to remove
 413  *
 414  *****************************************************************************/
 415 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 416     UINT t, s;
 417     WineD3DContext **oldArray = This->contexts;
 418
 419     TRACE("Removing ctx %p\n", context);
 420
 421     This->numContexts--;
 422
 423     if(This->numContexts) {
 424         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 425         if(!This->contexts) {
 426             ERR("Cannot allocate a new context array, PANIC!!!\n");
 427         }
 428         t = 0;
 429         for(s = 0; s < This->numContexts; s++) {
 430             if(oldArray[s] == context) continue;
 431             This->contexts[t] = oldArray[s];
 432             t++;
 433         }
 434     } else {
 435         This->contexts = NULL;
 436     }
 437
 438     HeapFree(GetProcessHeap(), 0, context);
 439     HeapFree(GetProcessHeap(), 0, oldArray);
 440 }
 441
 442 /*****************************************************************************
 443  * DestroyContext
 444  *
 445  * Destroys a wineD3DContext
 446  *
 447  * Params:
 448  *  This: Device to activate the context for
 449  *  context: Context to destroy
 450  *
 451  *****************************************************************************/
 452 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 453
 454     /* check that we are the current context first */
 455     TRACE("Destroying ctx %p\n", context);
 456     if(pwglGetCurrentContext() == context->glCtx){
 457         pwglMakeCurrent(NULL, NULL);
 458     }
 459
 460     if(context->isPBuffer) {
 461         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 462         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 463     } else ReleaseDC(context->win_handle, context->hdc);
 464     pwglDeleteContext(context->glCtx);
 465
 466     RemoveContextFromArray(This, context);
 467 }
 468
 469 /*****************************************************************************
 470  * SetupForBlit
 471  *
 472  * Sets up a context for DirectDraw blitting.
 473  * All texture units are disabled, except unit 0
 474  * Texture unit 0 is activted where GL_TEXTURE_2D is activated
 475  * fog, lighting, blending, alpha test, z test, scissor test, culling diabled
 476  * color writing enabled for all channels
 477  * register combiners disabled, shaders disabled
 478  * world matris is set to identity, texture matrix 0 too
 479  * projection matrix is setup for drawing screen coordinates
 480  *
 481  * Params:
 482  *  This: Device to activate the context for
 483  *  context: Context to setup
 484  *  width: render target width
 485  *  height: render target height
 486  *
 487  *****************************************************************************/
 488 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
 489     int i;
 490
 491     TRACE("Setting up context %p for blitting\n", context);
 492     if(context->last_was_blit) {
 493         TRACE("Context is already set up for blitting, nothing to do\n");
 494         return;
 495     }
 496     context->last_was_blit = TRUE;
 497
 498     /* TODO: Use a display list */
 499
 500     /* Disable shaders */
 501     This->shader_backend->shader_cleanup((IWineD3DDevice *) This);
 502     Context_MarkStateDirty(context, STATE_VSHADER);
 503     Context_MarkStateDirty(context, STATE_PIXELSHADER);
 504
 505     /* Disable all textures. The caller can then bind a texture it wants to blit
 506      * from
 507      */
 508     if(GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 509         glDisable(GL_REGISTER_COMBINERS_NV);
 510         checkGLcall("glDisable(GL_REGISTER_COMBINERS_NV)");
 511     }
 512     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
 513         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
 514          * function texture unit. No need to care for higher samplers
 515          */
 516         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
 517             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
 518             checkGLcall("glActiveTextureARB");
 519
 520             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 521                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 522                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 523             }
 524             glDisable(GL_TEXTURE_3D);
 525             checkGLcall("glDisable GL_TEXTURE_3D");
 526             glDisable(GL_TEXTURE_2D);
 527             checkGLcall("glDisable GL_TEXTURE_2D");
 528
 529             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 530             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
 531
 532             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(i, WINED3DTSS_COLOROP));
 533             Context_MarkStateDirty(context, STATE_SAMPLER(i));
 534         }
 535         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
 536         checkGLcall("glActiveTextureARB");
 537     }
 538     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 539         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 540         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 541     }
 542     glDisable(GL_TEXTURE_3D);
 543     checkGLcall("glDisable GL_TEXTURE_3D");
 544     glEnable(GL_TEXTURE_2D);
 545     checkGLcall("glEnable GL_TEXTURE_2D");
 546
 547     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 548
 549     glMatrixMode(GL_TEXTURE);
 550     checkGLcall("glMatrixMode(GL_TEXTURE)");
 551     glLoadIdentity();
 552     checkGLcall("glLoadIdentity()");
 553     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0));
 554
 555     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
 556         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 557                   GL_TEXTURE_LOD_BIAS_EXT,
 558                   0.0);
 559         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
 560     }
 561     Context_MarkStateDirty(context, STATE_SAMPLER(0));
 562     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(0, WINED3DTSS_COLOROP));
 563
 564     /* Other misc states */
 565     glDisable(GL_ALPHA_TEST);
 566     checkGLcall("glDisable(GL_ALPHA_TEST)");
 567     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE));
 568     glDisable(GL_LIGHTING);
 569     checkGLcall("glDisable GL_LIGHTING");
 570     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING));
 571     glDisable(GL_DEPTH_TEST);
 572     checkGLcall("glDisable GL_DEPTH_TEST");
 573     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE));
 574     glDisable(GL_FOG);
 575     checkGLcall("glDisable GL_FOG");
 576     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE));
 577     glDisable(GL_BLEND);
 578     checkGLcall("glDisable GL_BLEND");
 579     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 580     glDisable(GL_CULL_FACE);
 581     checkGLcall("glDisable GL_CULL_FACE");
 582     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE));
 583     glDisable(GL_STENCIL_TEST);
 584     checkGLcall("glDisable GL_STENCIL_TEST");
 585     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE));
 586     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 587         glDisable(GL_POINT_SPRITE_ARB);
 588         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
 589         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE));
 590     }
 591     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
 592     checkGLcall("glColorMask");
 593     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 594     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
 595         glDisable(GL_COLOR_SUM_EXT);
 596         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 597         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
 598     }
 599     if (GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 600         GL_EXTCALL(glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB));
 601         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 602         checkGLcall("glFinalCombinerInputNV");
 603     }
 604
 605     /* Setup transforms */
 606     glMatrixMode(GL_MODELVIEW);
 607     checkGLcall("glMatrixMode(GL_MODELVIEW)");
 608     glLoadIdentity();
 609     checkGLcall("glLoadIdentity()");
 610     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)));
 611
 612     glMatrixMode(GL_PROJECTION);
 613     checkGLcall("glMatrixMode(GL_PROJECTION)");
 614     glLoadIdentity();
 615     checkGLcall("glLoadIdentity()");
 616     glOrtho(0, width, height, 0, 0.0, -1.0);
 617     checkGLcall("glOrtho");
 618     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
 619
 620     context->last_was_rhw = TRUE;
 621     Context_MarkStateDirty(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
 622
 623     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
 624     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
 625     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
 626     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
 627     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
 628     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
 629     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 630
 631     glViewport(0, 0, width, height);
 632     checkGLcall("glViewport");
 633     Context_MarkStateDirty(context, STATE_VIEWPORT);
 634
 635     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 636         glDisable(GL_TEXTURE_SHADER_NV);
 637         checkGLcall("glDisable(GL_TEXTURE_SHADER_NV)");
 638     }
 639 }
 640
 641 /*****************************************************************************
 642  * findThreadContextForSwapChain
 643  *
 644  * Searches a swapchain for all contexts and picks one for the thread tid.
 645  * If none can be found the swapchain is requested to create a new context
 646  *
 647  *****************************************************************************/
 648 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
 649     int i;
 650
 651     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
 652         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
 653             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
 654         }
 655
 656     }
 657
 658     /* Create a new context for the thread */
 659     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
 660 }
 661
 662 /*****************************************************************************
 663  * FindContext
 664  *
 665  * Finds a context for the current render target and thread
 666  *
 667  * Parameters:
 668  *  target: Render target to find the context for
 669  *  tid: Thread to activate the context for
 670  *
 671  * Returns: The needed context
 672  *
 673  *****************************************************************************/
 674 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid) {
 675     IWineD3DSwapChain *swapchain = NULL;
 676     HRESULT hr;
 677     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
 678     WineD3DContext *context = This->activeContext;
 679     BOOL oldRenderOffscreen = This->render_offscreen;
 680
 681     hr = IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **) &swapchain);
 682     if(hr == WINED3D_OK && swapchain) {
 683         TRACE("Rendering onscreen\n");
 684
 685         context = findThreadContextForSwapChain(swapchain, tid);
 686
 687         This->render_offscreen = FALSE;
 688         /* The context != This->activeContext will catch a NOP context change. This can occur
 689          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
 690          * rendering. No context change is needed in that case
 691          */
 692
 693         if (wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 694             if(((IWineD3DSwapChainImpl *) swapchain)->backBuffer) {
 695                 glDrawBuffer(GL_BACK);
 696                 checkGLcall("glDrawBuffer(GL_BACK)");
 697             } else {
 698                 glDrawBuffer(GL_FRONT);
 699                 checkGLcall("glDrawBuffer(GL_FRONT)");
 700             }
 701         } else if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
 702             if(This->pbufferContext && tid == This->pbufferContext->tid) {
 703                 This->pbufferContext->tid = 0;
 704             }
 705         }
 706         IWineD3DSwapChain_Release(swapchain);
 707
 708         if(oldRenderOffscreen) {
 709             Context_MarkStateDirty(context, WINED3DRS_CULLMODE);
 710             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 711             Context_MarkStateDirty(context, STATE_VDECL);
 712             Context_MarkStateDirty(context, STATE_VIEWPORT);
 713             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 714         }
 715
 716     } else {
 717         TRACE("Rendering offscreen\n");
 718         This->render_offscreen = TRUE;
 719
 720         switch(wined3d_settings.offscreen_rendering_mode) {
 721             case ORM_FBO:
 722                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
 723                 if(This->activeContext && tid == This->lastThread) {
 724                     context = This->activeContext;
 725                 } else {
 726                     /* This may happen if the app jumps streight into offscreen rendering
 727                      * Start using the context of the primary swapchain. tid == 0 is no problem
 728                      * for findThreadContextForSwapChain.
 729                      *
 730                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 731                      * is perfect to call.
 732                      */
 733                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 734                 }
 735                 break;
 736
 737             case ORM_PBUFFER:
 738             {
 739                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
 740                 if(This->pbufferContext == NULL ||
 741                    This->pbufferWidth < targetimpl->currentDesc.Width ||
 742                    This->pbufferHeight < targetimpl->currentDesc.Height) {
 743                     if(This->pbufferContext) {
 744                         DestroyContext(This, This->pbufferContext);
 745                     }
 746
 747                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
 748                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
 749                      */
 750                     This->pbufferContext = CreateContext(This, targetimpl,
 751                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
 752                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
 753                     This->pbufferWidth = targetimpl->currentDesc.Width;
 754                     This->pbufferHeight = targetimpl->currentDesc.Height;
 755                    }
 756
 757                    if(This->pbufferContext) {
 758                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
 759                            FIXME("The PBuffr context is only supported for one thread for now!\n");
 760                        }
 761                        This->pbufferContext->tid = tid;
 762                        context = This->pbufferContext;
 763                        break;
 764                    } else {
 765                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
 766                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
 767                    }
 768             }
 769
 770             case ORM_BACKBUFFER:
 771                 /* Stay with the currently active context for back buffer rendering */
 772                 if(This->activeContext && tid == This->lastThread) {
 773                     context = This->activeContext;
 774                 } else {
 775                     /* This may happen if the app jumps streight into offscreen rendering
 776                      * Start using the context of the primary swapchain. tid == 0 is no problem
 777                      * for findThreadContextForSwapChain.
 778                      *
 779                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 780                      * is perfect to call.
 781                      */
 782                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 783                 }
 784                 glDrawBuffer(This->offscreenBuffer);
 785                 checkGLcall("glDrawBuffer(This->offscreenBuffer)");
 786                 break;
 787         }
 788
 789         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
 790             /* Make sure we have a OpenGL texture name so the PreLoad() used to read the buffer
 791              * back when we are done won't mark us dirty.
 792              */
 793             IWineD3DSurface_PreLoad(target);
 794         }
 795
 796         if(!oldRenderOffscreen) {
 797             Context_MarkStateDirty(context, WINED3DRS_CULLMODE);
 798             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 799             Context_MarkStateDirty(context, STATE_VDECL);
 800             Context_MarkStateDirty(context, STATE_VIEWPORT);
 801             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 802         }
 803     }
 804     if (readTexture) {
 805         BOOL oldInDraw = This->isInDraw;
 806
 807         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
 808          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
 809          * when using offscreen rendering with multithreading
 810          */
 811         This->isInDraw = TRUE;
 812
 813         /* Do that before switching the context:
 814          * Read the back buffer of the old drawable into the destination texture
 815          */
 816         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
 817
 818         /* Assume that the drawable will be modified by some other things now */
 819         ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->Flags &= ~SFLAG_INDRAWABLE;
 820
 821         This->isInDraw = oldInDraw;
 822     }
 823
 824     if(oldRenderOffscreen != This->render_offscreen && This->depth_copy_state != WINED3D_DCS_NO_COPY) {
 825         This->depth_copy_state = WINED3D_DCS_COPY;
 826     }
 827     return context;
 828 }
 829
 830 /*****************************************************************************
 831  * ActivateContext
 832  *
 833  * Finds a rendering context and drawable matching the device and render
 834  * target for the current thread, activates them and puts them into the
 835  * requested state.
 836  *
 837  * Params:
 838  *  This: Device to activate the context for
 839  *  target: Requested render target
 840  *  usage: Prepares the context for blitting, drawing or other actions
 841  *
 842  *****************************************************************************/
 843 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
 844     DWORD                         tid = GetCurrentThreadId();
 845     int                           i;
 846     DWORD                         dirtyState, idx;
 847     BYTE                          shift;
 848     WineD3DContext                *context;
 849
 850     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
 851
 852     ENTER_GL();
 853     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
 854         context = FindContext(This, target, tid);
 855         This->lastActiveRenderTarget = target;
 856         This->lastThread = tid;
 857     } else {
 858         /* Stick to the old context */
 859         context = This->activeContext;
 860     }
 861
 862     /* Activate the opengl context */
 863     if(context != This->activeContext) {
 864         BOOL ret;
 865         TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
 866         LEAVE_GL();
 867         ret = pwglMakeCurrent(context->hdc, context->glCtx);
 868         ENTER_GL();
 869         if(ret == FALSE) {
 870             ERR("Failed to activate the new context\n");
 871         }
 872         This->activeContext = context;
 873     }
 874
 875     switch(usage) {
 876         case CTXUSAGE_RESOURCELOAD:
 877             /* This does not require any special states to be set up */
 878             break;
 879
 880         case CTXUSAGE_CLEAR:
 881             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 882                 glEnable(GL_TEXTURE_SHADER_NV);
 883                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 884             }
 885
 886             glEnable(GL_SCISSOR_TEST);
 887             checkGLcall("glEnable GL_SCISSOR_TEST");
 888             context->last_was_blit = FALSE;
 889             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 890             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 891             break;
 892
 893         case CTXUSAGE_DRAWPRIM:
 894             /* This needs all dirty states applied */
 895             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 896                 glEnable(GL_TEXTURE_SHADER_NV);
 897                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 898             }
 899
 900             IWineD3DDeviceImpl_FindTexUnitMap(This);
 901
 902             for(i=0; i < context->numDirtyEntries; i++) {
 903                 dirtyState = context->dirtyArray[i];
 904                 idx = dirtyState >> 5;
 905                 shift = dirtyState & 0x1f;
 906                 context->isStateDirty[idx] &= ~(1 << shift);
 907                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
 908             }
 909             context->numDirtyEntries = 0; /* This makes the whole list clean */
 910             context->last_was_blit = FALSE;
 911             break;
 912
 913         case CTXUSAGE_BLIT:
 914             SetupForBlit(This, context,
 915                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
 916                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
 917             break;
 918
 919         default:
 920             FIXME("Unexpected context usage requested\n");
 921     }
 922     LEAVE_GL();
 923 }