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         PUSH2(WGL_SUPPORT_OPENGL_ARB, GL_TRUE);
 225         PUSH2(WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB); /* Make sure we receive an accelerated format. On windows (at least on ATI) this is not always the case */
 226
 227         if(!getColorBits(target->resource.format, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
 228             ERR("Unable to get color bits for format %#x!\n", target->resource.format);
 229             return FALSE;
 230         }
 231         PUSH2(WGL_COLOR_BITS_ARB, colorBits);
 232         PUSH2(WGL_RED_BITS_ARB, redBits);
 233         PUSH2(WGL_GREEN_BITS_ARB, greenBits);
 234         PUSH2(WGL_BLUE_BITS_ARB, blueBits);
 235         PUSH2(WGL_ALPHA_BITS_ARB, alphaBits);
 236
 237         /* Retrieve the depth stencil format from the present parameters.
 238          * The choice of the proper format can give a nice performance boost
 239          * in case of GPU limited programs. */
 240         if(pPresentParms->EnableAutoDepthStencil) {
 241             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 242             if(!getDepthStencilBits(pPresentParms->AutoDepthStencilFormat, &depthBits, &stencilBits)) {
 243                 ERR("Unable to get depth / stencil bits for AutoDepthStencilFormat %#x!\n", pPresentParms->AutoDepthStencilFormat);
 244                 return FALSE;
 245             }
 246             PUSH2(WGL_DEPTH_BITS_ARB, depthBits);
 247             PUSH2(WGL_STENCIL_BITS_ARB, stencilBits);
 248         }
 249
 250         PUSH1(0); /* end the list */
 251
 252         /* In case of failure hope that standard ChooosePixelFormat will find something suitable */
 253         if(!GL_EXTCALL(wglChoosePixelFormatARB(hdc, (const int*)&attribs, NULL, 1, &iPixelFormat, &nFormats)))
 254         {
 255             /* PixelFormat selection */
 256             ZeroMemory(&pfd, sizeof(pfd));
 257             pfd.nSize      = sizeof(pfd);
 258             pfd.nVersion   = 1;
 259             pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 260             pfd.iPixelType = PFD_TYPE_RGBA;
 261             pfd.cAlphaBits = alphaBits;
 262             pfd.cColorBits = colorBits;
 263             pfd.cDepthBits = depthBits;
 264             pfd.cStencilBits = stencilBits;
 265             pfd.iLayerType = PFD_MAIN_PLANE;
 266
 267             iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 268             if(!iPixelFormat) {
 269                 /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 270                 ERR("Can't find a suitable iPixelFormat\n");
 271             }
 272         }
 273
 274         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 275         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 276         if(!res) {
 277             int oldPixelFormat = GetPixelFormat(hdc);
 278
 279             if(oldPixelFormat) {
 280                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 281                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 282                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 283             }
 284             else {
 285                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 286                 return FALSE;
 287             }
 288         }
 289     }
 290 #undef PUSH1
 291 #undef PUSH2
 292
 293     ctx = pwglCreateContext(hdc);
 294     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 295
 296     if(!ctx) {
 297         ERR("Failed to create a WGL context\n");
 298         if(create_pbuffer) {
 299             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 300             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 301         }
 302         goto out;
 303     }
 304     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 305     if(!ret) {
 306         ERR("Failed to add the newly created context to the context list\n");
 307         pwglDeleteContext(ctx);
 308         if(create_pbuffer) {
 309             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 310             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 311         }
 312         goto out;
 313     }
 314     ret->surface = (IWineD3DSurface *) target;
 315     ret->isPBuffer = create_pbuffer;
 316     ret->tid = GetCurrentThreadId();
 317
 318     TRACE("Successfully created new context %p\n", ret);
 319
 320     /* Set up the context defaults */
 321     oldCtx  = pwglGetCurrentContext();
 322     oldDrawable = pwglGetCurrentDC();
 323     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 324         ERR("Cannot activate context to set up defaults\n");
 325         goto out;
 326     }
 327
 328     ENTER_GL();
 329     TRACE("Setting up the screen\n");
 330     /* Clear the screen */
 331     glClearColor(1.0, 0.0, 0.0, 0.0);
 332     checkGLcall("glClearColor");
 333     glClearIndex(0);
 334     glClearDepth(1);
 335     glClearStencil(0xffff);
 336
 337     checkGLcall("glClear");
 338
 339     glColor3f(1.0, 1.0, 1.0);
 340     checkGLcall("glColor3f");
 341
 342     glEnable(GL_LIGHTING);
 343     checkGLcall("glEnable");
 344
 345     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 346     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 347
 348     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 349     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 350
 351     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 352     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 353
 354     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 355     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 356     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 357     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 358
 359     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 360         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 361          * and textures in DIB sections(due to the memory protection).
 362          */
 363         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 364         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 365     }
 366     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 367         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 368          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 369          * GL_VERTEX_BLEND_ARB isn't enabled too
 370          */
 371         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 372         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 373     }
 374     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 375         glEnable(GL_TEXTURE_SHADER_NV);
 376         checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 377
 378         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 379          * the previous texture where to source the offset from is always unit - 1.
 380          */
 381         for(s = 1; s < GL_LIMITS(textures); s++) {
 382             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 383             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 384             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 385         }
 386     }
 387     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 388         for(s = 0; s < GL_LIMITS(textures); s++) {
 389             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 390             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 391             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 392         }
 393     }
 394     LEAVE_GL();
 395
 396     if(oldDrawable && oldCtx) {
 397         pwglMakeCurrent(oldDrawable, oldCtx);
 398     }
 399
 400 out:
 401     return ret;
 402 }
 403
 404 /*****************************************************************************
 405  * RemoveContextFromArray
 406  *
 407  * Removes a context from the context manager. The opengl context is not
 408  * destroyed or unset. context is not a valid pointer after that call.
 409  *
 410  * Similar to the former call this isn't a performance critical function. A
 411  * helper function for DestroyContext.
 412  *
 413  * Params:
 414  *  This: Device to activate the context for
 415  *  context: Context to remove
 416  *
 417  *****************************************************************************/
 418 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 419     UINT t, s;
 420     WineD3DContext **oldArray = This->contexts;
 421
 422     TRACE("Removing ctx %p\n", context);
 423
 424     This->numContexts--;
 425
 426     if(This->numContexts) {
 427         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 428         if(!This->contexts) {
 429             ERR("Cannot allocate a new context array, PANIC!!!\n");
 430         }
 431         t = 0;
 432         for(s = 0; s < This->numContexts; s++) {
 433             if(oldArray[s] == context) continue;
 434             This->contexts[t] = oldArray[s];
 435             t++;
 436         }
 437     } else {
 438         This->contexts = NULL;
 439     }
 440
 441     HeapFree(GetProcessHeap(), 0, context);
 442     HeapFree(GetProcessHeap(), 0, oldArray);
 443 }
 444
 445 /*****************************************************************************
 446  * DestroyContext
 447  *
 448  * Destroys a wineD3DContext
 449  *
 450  * Params:
 451  *  This: Device to activate the context for
 452  *  context: Context to destroy
 453  *
 454  *****************************************************************************/
 455 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 456
 457     /* check that we are the current context first */
 458     TRACE("Destroying ctx %p\n", context);
 459     if(pwglGetCurrentContext() == context->glCtx){
 460         pwglMakeCurrent(NULL, NULL);
 461     }
 462
 463     if(context->isPBuffer) {
 464         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 465         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 466     } else ReleaseDC(context->win_handle, context->hdc);
 467     pwglDeleteContext(context->glCtx);
 468
 469     RemoveContextFromArray(This, context);
 470 }
 471
 472 /*****************************************************************************
 473  * SetupForBlit
 474  *
 475  * Sets up a context for DirectDraw blitting.
 476  * All texture units are disabled, texture unit 0 is set as current unit
 477  * fog, lighting, blending, alpha test, z test, scissor test, culling diabled
 478  * color writing enabled for all channels
 479  * register combiners disabled, shaders disabled
 480  * world matris is set to identity, texture matrix 0 too
 481  * projection matrix is setup for drawing screen coordinates
 482  *
 483  * Params:
 484  *  This: Device to activate the context for
 485  *  context: Context to setup
 486  *  width: render target width
 487  *  height: render target height
 488  *
 489  *****************************************************************************/
 490 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
 491     int i;
 492
 493     TRACE("Setting up context %p for blitting\n", context);
 494     if(context->last_was_blit) {
 495         TRACE("Context is already set up for blitting, nothing to do\n");
 496         return;
 497     }
 498     context->last_was_blit = TRUE;
 499
 500     /* TODO: Use a display list */
 501
 502     /* Disable shaders */
 503     This->shader_backend->shader_cleanup((IWineD3DDevice *) This);
 504     Context_MarkStateDirty(context, STATE_VSHADER);
 505     Context_MarkStateDirty(context, STATE_PIXELSHADER);
 506
 507     /* Disable all textures. The caller can then bind a texture it wants to blit
 508      * from
 509      */
 510     if(GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 511         glDisable(GL_REGISTER_COMBINERS_NV);
 512         checkGLcall("glDisable(GL_REGISTER_COMBINERS_NV)");
 513     }
 514     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
 515         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
 516          * function texture unit. No need to care for higher samplers
 517          */
 518         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
 519             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
 520             checkGLcall("glActiveTextureARB");
 521
 522             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 523                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 524                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 525             }
 526             glDisable(GL_TEXTURE_3D);
 527             checkGLcall("glDisable GL_TEXTURE_3D");
 528             glDisable(GL_TEXTURE_2D);
 529             checkGLcall("glDisable GL_TEXTURE_2D");
 530
 531             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 532             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
 533
 534             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(i, WINED3DTSS_COLOROP));
 535             Context_MarkStateDirty(context, STATE_SAMPLER(i));
 536         }
 537         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
 538         checkGLcall("glActiveTextureARB");
 539     }
 540     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 541         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 542         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 543     }
 544     glDisable(GL_TEXTURE_3D);
 545     checkGLcall("glDisable GL_TEXTURE_3D");
 546     glDisable(GL_TEXTURE_2D);
 547     checkGLcall("glDisable GL_TEXTURE_2D");
 548
 549     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 550
 551     glMatrixMode(GL_TEXTURE);
 552     checkGLcall("glMatrixMode(GL_TEXTURE)");
 553     glLoadIdentity();
 554     checkGLcall("glLoadIdentity()");
 555     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0));
 556
 557     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
 558         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 559                   GL_TEXTURE_LOD_BIAS_EXT,
 560                   0.0);
 561         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
 562     }
 563     Context_MarkStateDirty(context, STATE_SAMPLER(0));
 564     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(0, WINED3DTSS_COLOROP));
 565
 566     /* Other misc states */
 567     glDisable(GL_ALPHA_TEST);
 568     checkGLcall("glDisable(GL_ALPHA_TEST)");
 569     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE));
 570     glDisable(GL_LIGHTING);
 571     checkGLcall("glDisable GL_LIGHTING");
 572     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING));
 573     glDisable(GL_DEPTH_TEST);
 574     checkGLcall("glDisable GL_DEPTH_TEST");
 575     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE));
 576     glDisable(GL_FOG);
 577     checkGLcall("glDisable GL_FOG");
 578     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE));
 579     glDisable(GL_BLEND);
 580     checkGLcall("glDisable GL_BLEND");
 581     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 582     glDisable(GL_CULL_FACE);
 583     checkGLcall("glDisable GL_CULL_FACE");
 584     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE));
 585     glDisable(GL_STENCIL_TEST);
 586     checkGLcall("glDisable GL_STENCIL_TEST");
 587     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE));
 588     glDisable(GL_SCISSOR_TEST);
 589     checkGLcall("glDisable GL_SCISSOR_TEST");
 590     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 591     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 592         glDisable(GL_POINT_SPRITE_ARB);
 593         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
 594         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE));
 595     }
 596     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
 597     checkGLcall("glColorMask");
 598     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 599     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
 600         glDisable(GL_COLOR_SUM_EXT);
 601         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 602         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
 603     }
 604     if (GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 605         GL_EXTCALL(glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB));
 606         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 607         checkGLcall("glFinalCombinerInputNV");
 608     }
 609
 610     /* Setup transforms */
 611     glMatrixMode(GL_MODELVIEW);
 612     checkGLcall("glMatrixMode(GL_MODELVIEW)");
 613     glLoadIdentity();
 614     checkGLcall("glLoadIdentity()");
 615     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)));
 616
 617     glMatrixMode(GL_PROJECTION);
 618     checkGLcall("glMatrixMode(GL_PROJECTION)");
 619     glLoadIdentity();
 620     checkGLcall("glLoadIdentity()");
 621     glOrtho(0, width, height, 0, 0.0, -1.0);
 622     checkGLcall("glOrtho");
 623     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
 624
 625     context->last_was_rhw = TRUE;
 626     Context_MarkStateDirty(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
 627
 628     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
 629     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
 630     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
 631     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
 632     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
 633     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
 634     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 635
 636     glViewport(0, 0, width, height);
 637     checkGLcall("glViewport");
 638     Context_MarkStateDirty(context, STATE_VIEWPORT);
 639
 640     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 641         glDisable(GL_TEXTURE_SHADER_NV);
 642         checkGLcall("glDisable(GL_TEXTURE_SHADER_NV)");
 643     }
 644 }
 645
 646 /*****************************************************************************
 647  * findThreadContextForSwapChain
 648  *
 649  * Searches a swapchain for all contexts and picks one for the thread tid.
 650  * If none can be found the swapchain is requested to create a new context
 651  *
 652  *****************************************************************************/
 653 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
 654     int i;
 655
 656     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
 657         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
 658             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
 659         }
 660
 661     }
 662
 663     /* Create a new context for the thread */
 664     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
 665 }
 666
 667 /*****************************************************************************
 668  * FindContext
 669  *
 670  * Finds a context for the current render target and thread
 671  *
 672  * Parameters:
 673  *  target: Render target to find the context for
 674  *  tid: Thread to activate the context for
 675  *
 676  * Returns: The needed context
 677  *
 678  *****************************************************************************/
 679 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid, GLint *buffer) {
 680     IWineD3DSwapChain *swapchain = NULL;
 681     HRESULT hr;
 682     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
 683     WineD3DContext *context = This->activeContext;
 684     BOOL oldRenderOffscreen = This->render_offscreen;
 685     const WINED3DFORMAT oldFmt = ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->resource.format;
 686     const WINED3DFORMAT newFmt = ((IWineD3DSurfaceImpl *) target)->resource.format;
 687
 688     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
 689      * the alpha blend state changes with different render target formats
 690      */
 691     if(oldFmt != newFmt) {
 692         const StaticPixelFormatDesc *old = getFormatDescEntry(oldFmt, NULL, NULL);
 693         const StaticPixelFormatDesc *new = getFormatDescEntry(oldFmt, NULL, NULL);
 694
 695         if((old->alphaMask && !new->alphaMask) || (!old->alphaMask && new->alphaMask)) {
 696             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 697         }
 698     }
 699
 700     hr = IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **) &swapchain);
 701     if(hr == WINED3D_OK && swapchain) {
 702         TRACE("Rendering onscreen\n");
 703
 704         context = findThreadContextForSwapChain(swapchain, tid);
 705
 706         This->render_offscreen = FALSE;
 707         /* The context != This->activeContext will catch a NOP context change. This can occur
 708          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
 709          * rendering. No context change is needed in that case
 710          */
 711
 712         if(((IWineD3DSwapChainImpl *) swapchain)->frontBuffer == target) {
 713             *buffer = GL_FRONT;
 714         } else {
 715             *buffer = GL_BACK;
 716         }
 717         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
 718             if(This->pbufferContext && tid == This->pbufferContext->tid) {
 719                 This->pbufferContext->tid = 0;
 720             }
 721         }
 722         IWineD3DSwapChain_Release(swapchain);
 723
 724         if(oldRenderOffscreen) {
 725             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 726             Context_MarkStateDirty(context, STATE_VDECL);
 727             Context_MarkStateDirty(context, STATE_VIEWPORT);
 728             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 729             Context_MarkStateDirty(context, STATE_FRONTFACE);
 730         }
 731
 732     } else {
 733         TRACE("Rendering offscreen\n");
 734         This->render_offscreen = TRUE;
 735         *buffer = This->offscreenBuffer;
 736
 737         switch(wined3d_settings.offscreen_rendering_mode) {
 738             case ORM_FBO:
 739                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
 740                 if(This->activeContext && tid == This->lastThread) {
 741                     context = This->activeContext;
 742                 } else {
 743                     /* This may happen if the app jumps streight into offscreen rendering
 744                      * Start using the context of the primary swapchain. tid == 0 is no problem
 745                      * for findThreadContextForSwapChain.
 746                      *
 747                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 748                      * is perfect to call.
 749                      */
 750                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 751                 }
 752                 break;
 753
 754             case ORM_PBUFFER:
 755             {
 756                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
 757                 if(This->pbufferContext == NULL ||
 758                    This->pbufferWidth < targetimpl->currentDesc.Width ||
 759                    This->pbufferHeight < targetimpl->currentDesc.Height) {
 760                     if(This->pbufferContext) {
 761                         DestroyContext(This, This->pbufferContext);
 762                     }
 763
 764                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
 765                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
 766                      */
 767                     This->pbufferContext = CreateContext(This, targetimpl,
 768                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
 769                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
 770                     This->pbufferWidth = targetimpl->currentDesc.Width;
 771                     This->pbufferHeight = targetimpl->currentDesc.Height;
 772                    }
 773
 774                    if(This->pbufferContext) {
 775                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
 776                            FIXME("The PBuffr context is only supported for one thread for now!\n");
 777                        }
 778                        This->pbufferContext->tid = tid;
 779                        context = This->pbufferContext;
 780                        break;
 781                    } else {
 782                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
 783                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
 784                    }
 785             }
 786
 787             case ORM_BACKBUFFER:
 788                 /* Stay with the currently active context for back buffer rendering */
 789                 if(This->activeContext && tid == This->lastThread) {
 790                     context = This->activeContext;
 791                 } else {
 792                     /* This may happen if the app jumps streight into offscreen rendering
 793                      * Start using the context of the primary swapchain. tid == 0 is no problem
 794                      * for findThreadContextForSwapChain.
 795                      *
 796                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 797                      * is perfect to call.
 798                      */
 799                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 800                 }
 801                 break;
 802         }
 803
 804         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
 805             /* Make sure we have a OpenGL texture name so the PreLoad() used to read the buffer
 806              * back when we are done won't mark us dirty.
 807              */
 808             IWineD3DSurface_PreLoad(target);
 809         }
 810
 811         if(!oldRenderOffscreen) {
 812             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 813             Context_MarkStateDirty(context, STATE_VDECL);
 814             Context_MarkStateDirty(context, STATE_VIEWPORT);
 815             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 816             Context_MarkStateDirty(context, STATE_FRONTFACE);
 817         }
 818     }
 819     if (readTexture) {
 820         BOOL oldInDraw = This->isInDraw;
 821
 822         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
 823          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
 824          * when using offscreen rendering with multithreading
 825          */
 826         This->isInDraw = TRUE;
 827
 828         /* Do that before switching the context:
 829          * Read the back buffer of the old drawable into the destination texture
 830          */
 831         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
 832
 833         /* Assume that the drawable will be modified by some other things now */
 834         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
 835
 836         This->isInDraw = oldInDraw;
 837     }
 838
 839     if(oldRenderOffscreen != This->render_offscreen && This->depth_copy_state != WINED3D_DCS_NO_COPY) {
 840         This->depth_copy_state = WINED3D_DCS_COPY;
 841     }
 842     return context;
 843 }
 844
 845 /*****************************************************************************
 846  * ActivateContext
 847  *
 848  * Finds a rendering context and drawable matching the device and render
 849  * target for the current thread, activates them and puts them into the
 850  * requested state.
 851  *
 852  * Params:
 853  *  This: Device to activate the context for
 854  *  target: Requested render target
 855  *  usage: Prepares the context for blitting, drawing or other actions
 856  *
 857  *****************************************************************************/
 858 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
 859     DWORD                         tid = GetCurrentThreadId();
 860     int                           i;
 861     DWORD                         dirtyState, idx;
 862     BYTE                          shift;
 863     WineD3DContext                *context;
 864     GLint                         drawBuffer=0;
 865
 866     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
 867     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
 868         context = FindContext(This, target, tid, &drawBuffer);
 869         This->lastActiveRenderTarget = target;
 870         This->lastThread = tid;
 871     } else {
 872         /* Stick to the old context */
 873         context = This->activeContext;
 874     }
 875
 876     /* Activate the opengl context */
 877     if(context != This->activeContext) {
 878         BOOL ret;
 879
 880         /* Prevent an unneeded context switch as those are expensive */
 881         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
 882             TRACE("Already using gl context %p\n", context->glCtx);
 883         }
 884         else {
 885             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
 886             ret = pwglMakeCurrent(context->hdc, context->glCtx);
 887             if(ret == FALSE) {
 888                 ERR("Failed to activate the new context\n");
 889             }
 890         }
 891         This->activeContext = context;
 892     }
 893
 894     /* We only need ENTER_GL for the gl calls made below and for the helper functions which make GL calls */
 895     ENTER_GL();
 896     /* Select the right draw buffer. It is selected in FindContext. */
 897     if(drawBuffer && context->last_draw_buffer != drawBuffer) {
 898         TRACE("Drawing to buffer: %#x\n", drawBuffer);
 899         context->last_draw_buffer = drawBuffer;
 900
 901         glDrawBuffer(drawBuffer);
 902         checkGLcall("glDrawBuffer");
 903     }
 904
 905     switch(usage) {
 906         case CTXUSAGE_RESOURCELOAD:
 907             /* This does not require any special states to be set up */
 908             break;
 909
 910         case CTXUSAGE_CLEAR:
 911             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 912                 glEnable(GL_TEXTURE_SHADER_NV);
 913                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 914             }
 915
 916             glEnable(GL_SCISSOR_TEST);
 917             checkGLcall("glEnable GL_SCISSOR_TEST");
 918             context->last_was_blit = FALSE;
 919             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 920             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 921             break;
 922
 923         case CTXUSAGE_DRAWPRIM:
 924             /* This needs all dirty states applied */
 925             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 926                 glEnable(GL_TEXTURE_SHADER_NV);
 927                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 928             }
 929
 930             IWineD3DDeviceImpl_FindTexUnitMap(This);
 931
 932             for(i=0; i < context->numDirtyEntries; i++) {
 933                 dirtyState = context->dirtyArray[i];
 934                 idx = dirtyState >> 5;
 935                 shift = dirtyState & 0x1f;
 936                 context->isStateDirty[idx] &= ~(1 << shift);
 937                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
 938             }
 939             context->numDirtyEntries = 0; /* This makes the whole list clean */
 940             context->last_was_blit = FALSE;
 941             break;
 942
 943         case CTXUSAGE_BLIT:
 944             SetupForBlit(This, context,
 945                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
 946                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
 947             break;
 948
 949         default:
 950             FIXME("Unexpected context usage requested\n");
 951     }
 952     LEAVE_GL();
 953 }