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         WINED3DFORMAT fmt = target->resource.format;
 214
 215         hdc = GetDC(win_handle);
 216         if(hdc == NULL) {
 217             ERR("Cannot retrieve a device context!\n");
 218             goto out;
 219         }
 220
 221         /* PixelFormat selection */
 222         PUSH2(WGL_DRAW_TO_WINDOW_ARB, GL_TRUE); /* We want to draw to a window */
 223         PUSH2(WGL_DOUBLE_BUFFER_ARB, GL_TRUE);
 224         PUSH2(WGL_PIXEL_TYPE_ARB, WGL_TYPE_RGBA_ARB); /* Make sure we don't get a float or color index format */
 225         PUSH2(WGL_SUPPORT_OPENGL_ARB, GL_TRUE);
 226         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 */
 227
 228         /* In case of ORM_BACKBUFFER, make sure to request an alpha component for X4R4G4B4/X8R8G8B8 as we might need it for the backbuffer. */
 229         if(wined3d_settings.offscreen_rendering_mode == ORM_BACKBUFFER) {
 230             if(target->resource.format == WINED3DFMT_X4R4G4B4)
 231                 fmt = WINED3DFMT_A4R4G4B4;
 232             else if(target->resource.format == WINED3DFMT_X8R8G8B8)
 233                 fmt = WINED3DFMT_A8R8G8B8;
 234
 235             /* We like to have two aux buffers in backbuffer mode */
 236             PUSH2(WGL_AUX_BUFFERS_ARB, 2);
 237         }
 238
 239         if(!getColorBits(fmt, &redBits, &greenBits, &blueBits, &alphaBits, &colorBits)) {
 240             ERR("Unable to get color bits for format %#x!\n", target->resource.format);
 241             return FALSE;
 242         }
 243         PUSH2(WGL_COLOR_BITS_ARB, colorBits);
 244         PUSH2(WGL_RED_BITS_ARB, redBits);
 245         PUSH2(WGL_GREEN_BITS_ARB, greenBits);
 246         PUSH2(WGL_BLUE_BITS_ARB, blueBits);
 247         PUSH2(WGL_ALPHA_BITS_ARB, alphaBits);
 248
 249         /* Retrieve the depth stencil format from the present parameters.
 250          * The choice of the proper format can give a nice performance boost
 251          * in case of GPU limited programs. */
 252         if(pPresentParms->EnableAutoDepthStencil) {
 253             TRACE("pPresentParms->EnableAutoDepthStencil=enabled; using AutoDepthStencilFormat=%s\n", debug_d3dformat(pPresentParms->AutoDepthStencilFormat));
 254             if(!getDepthStencilBits(pPresentParms->AutoDepthStencilFormat, &depthBits, &stencilBits)) {
 255                 ERR("Unable to get depth / stencil bits for AutoDepthStencilFormat %#x!\n", pPresentParms->AutoDepthStencilFormat);
 256                 return FALSE;
 257             }
 258             PUSH2(WGL_DEPTH_BITS_ARB, depthBits);
 259             PUSH2(WGL_STENCIL_BITS_ARB, stencilBits);
 260         }
 261
 262         PUSH1(0); /* end the list */
 263
 264         /* In case of failure hope that standard ChoosePixelFormat will find something suitable */
 265         if(!GL_EXTCALL(wglChoosePixelFormatARB(hdc, (const int*)&attribs, NULL, 1, &iPixelFormat, &nFormats)))
 266         {
 267             /* PixelFormat selection */
 268             ZeroMemory(&pfd, sizeof(pfd));
 269             pfd.nSize      = sizeof(pfd);
 270             pfd.nVersion   = 1;
 271             pfd.dwFlags    = PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW;/*PFD_GENERIC_ACCELERATED*/
 272             pfd.iPixelType = PFD_TYPE_RGBA;
 273             pfd.cAlphaBits = alphaBits;
 274             pfd.cColorBits = colorBits;
 275             pfd.cDepthBits = depthBits;
 276             pfd.cStencilBits = stencilBits;
 277             pfd.iLayerType = PFD_MAIN_PLANE;
 278
 279             iPixelFormat = ChoosePixelFormat(hdc, &pfd);
 280             if(!iPixelFormat) {
 281                 /* If this happens something is very wrong as ChoosePixelFormat barely fails */
 282                 ERR("Can't find a suitable iPixelFormat\n");
 283             }
 284         }
 285
 286         DescribePixelFormat(hdc, iPixelFormat, sizeof(pfd), &pfd);
 287         res = SetPixelFormat(hdc, iPixelFormat, NULL);
 288         if(!res) {
 289             int oldPixelFormat = GetPixelFormat(hdc);
 290
 291             if(oldPixelFormat) {
 292                 /* OpenGL doesn't allow pixel format adjustments. Print an error and continue using the old format.
 293                  * There's a big chance that the old format works although with a performance hit and perhaps rendering errors. */
 294                 ERR("HDC=%p is already set to iPixelFormat=%d and OpenGL doesn't allow changes!\n", hdc, oldPixelFormat);
 295             }
 296             else {
 297                 ERR("SetPixelFormat failed on HDC=%p for iPixelFormat=%d\n", hdc, iPixelFormat);
 298                 return FALSE;
 299             }
 300         }
 301     }
 302 #undef PUSH1
 303 #undef PUSH2
 304
 305     ctx = pwglCreateContext(hdc);
 306     if(This->numContexts) pwglShareLists(This->contexts[0]->glCtx, ctx);
 307
 308     if(!ctx) {
 309         ERR("Failed to create a WGL context\n");
 310         if(create_pbuffer) {
 311             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 312             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 313         }
 314         goto out;
 315     }
 316     ret = AddContextToArray(This, win_handle, hdc, ctx, pbuffer);
 317     if(!ret) {
 318         ERR("Failed to add the newly created context to the context list\n");
 319         pwglDeleteContext(ctx);
 320         if(create_pbuffer) {
 321             GL_EXTCALL(wglReleasePbufferDCARB(pbuffer, hdc));
 322             GL_EXTCALL(wglDestroyPbufferARB(pbuffer));
 323         }
 324         goto out;
 325     }
 326     ret->surface = (IWineD3DSurface *) target;
 327     ret->isPBuffer = create_pbuffer;
 328     ret->tid = GetCurrentThreadId();
 329
 330     TRACE("Successfully created new context %p\n", ret);
 331
 332     /* Set up the context defaults */
 333     oldCtx  = pwglGetCurrentContext();
 334     oldDrawable = pwglGetCurrentDC();
 335     if(pwglMakeCurrent(hdc, ctx) == FALSE) {
 336         ERR("Cannot activate context to set up defaults\n");
 337         goto out;
 338     }
 339
 340     ENTER_GL();
 341     TRACE("Setting up the screen\n");
 342     /* Clear the screen */
 343     glClearColor(1.0, 0.0, 0.0, 0.0);
 344     checkGLcall("glClearColor");
 345     glClearIndex(0);
 346     glClearDepth(1);
 347     glClearStencil(0xffff);
 348
 349     checkGLcall("glClear");
 350
 351     glColor3f(1.0, 1.0, 1.0);
 352     checkGLcall("glColor3f");
 353
 354     glEnable(GL_LIGHTING);
 355     checkGLcall("glEnable");
 356
 357     glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);
 358     checkGLcall("glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, GL_TRUE);");
 359
 360     glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);
 361     checkGLcall("glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_EXT);");
 362
 363     glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 364     checkGLcall("glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);");
 365
 366     glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);
 367     checkGLcall("glPixelStorei(GL_PACK_ALIGNMENT, This->surface_alignment);");
 368     glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);
 369     checkGLcall("glPixelStorei(GL_UNPACK_ALIGNMENT, This->surface_alignment);");
 370
 371     if(GL_SUPPORT(APPLE_CLIENT_STORAGE)) {
 372         /* Most textures will use client storage if supported. Exceptions are non-native power of 2 textures
 373          * and textures in DIB sections(due to the memory protection).
 374          */
 375         glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE);
 376         checkGLcall("glPixelStorei(GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE)");
 377     }
 378     if(GL_SUPPORT(ARB_VERTEX_BLEND)) {
 379         /* Direct3D always uses n-1 weights for n world matrices and uses 1 - sum for the last one
 380          * this is equal to GL_WEIGHT_SUM_UNITY_ARB. Enabling it doesn't do anything unless
 381          * GL_VERTEX_BLEND_ARB isn't enabled too
 382          */
 383         glEnable(GL_WEIGHT_SUM_UNITY_ARB);
 384         checkGLcall("glEnable(GL_WEIGHT_SUM_UNITY_ARB)");
 385     }
 386     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 387         glEnable(GL_TEXTURE_SHADER_NV);
 388         checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 389
 390         /* Set up the previous texture input for all shader units. This applies to bump mapping, and in d3d
 391          * the previous texture where to source the offset from is always unit - 1.
 392          */
 393         for(s = 1; s < GL_LIMITS(textures); s++) {
 394             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 395             glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, GL_TEXTURE0_ARB + s - 1);
 396             checkGLcall("glTexEnvi(GL_TEXTURE_SHADER_NV, GL_PREVIOUS_TEXTURE_INPUT_NV, ...\n");
 397         }
 398     }
 399     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 400         for(s = 0; s < GL_LIMITS(textures); s++) {
 401             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + s));
 402             glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
 403             checkGLcall("glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE)\n");
 404         }
 405     }
 406     LEAVE_GL();
 407
 408     if(oldDrawable && oldCtx) {
 409         pwglMakeCurrent(oldDrawable, oldCtx);
 410     }
 411
 412 out:
 413     return ret;
 414 }
 415
 416 /*****************************************************************************
 417  * RemoveContextFromArray
 418  *
 419  * Removes a context from the context manager. The opengl context is not
 420  * destroyed or unset. context is not a valid pointer after that call.
 421  *
 422  * Similar to the former call this isn't a performance critical function. A
 423  * helper function for DestroyContext.
 424  *
 425  * Params:
 426  *  This: Device to activate the context for
 427  *  context: Context to remove
 428  *
 429  *****************************************************************************/
 430 static void RemoveContextFromArray(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 431     UINT t, s;
 432     WineD3DContext **oldArray = This->contexts;
 433
 434     TRACE("Removing ctx %p\n", context);
 435
 436     This->numContexts--;
 437
 438     if(This->numContexts) {
 439         This->contexts = HeapAlloc(GetProcessHeap(), 0, sizeof(*This->contexts) * This->numContexts);
 440         if(!This->contexts) {
 441             ERR("Cannot allocate a new context array, PANIC!!!\n");
 442         }
 443         t = 0;
 444         for(s = 0; s < This->numContexts; s++) {
 445             if(oldArray[s] == context) continue;
 446             This->contexts[t] = oldArray[s];
 447             t++;
 448         }
 449     } else {
 450         This->contexts = NULL;
 451     }
 452
 453     HeapFree(GetProcessHeap(), 0, context);
 454     HeapFree(GetProcessHeap(), 0, oldArray);
 455 }
 456
 457 /*****************************************************************************
 458  * DestroyContext
 459  *
 460  * Destroys a wineD3DContext
 461  *
 462  * Params:
 463  *  This: Device to activate the context for
 464  *  context: Context to destroy
 465  *
 466  *****************************************************************************/
 467 void DestroyContext(IWineD3DDeviceImpl *This, WineD3DContext *context) {
 468
 469     /* check that we are the current context first */
 470     TRACE("Destroying ctx %p\n", context);
 471     if(pwglGetCurrentContext() == context->glCtx){
 472         pwglMakeCurrent(NULL, NULL);
 473     }
 474
 475     if(context->isPBuffer) {
 476         GL_EXTCALL(wglReleasePbufferDCARB(context->pbuffer, context->hdc));
 477         GL_EXTCALL(wglDestroyPbufferARB(context->pbuffer));
 478     } else ReleaseDC(context->win_handle, context->hdc);
 479     pwglDeleteContext(context->glCtx);
 480
 481     RemoveContextFromArray(This, context);
 482 }
 483
 484 /*****************************************************************************
 485  * SetupForBlit
 486  *
 487  * Sets up a context for DirectDraw blitting.
 488  * All texture units are disabled, texture unit 0 is set as current unit
 489  * fog, lighting, blending, alpha test, z test, scissor test, culling disabled
 490  * color writing enabled for all channels
 491  * register combiners disabled, shaders disabled
 492  * world matrix is set to identity, texture matrix 0 too
 493  * projection matrix is setup for drawing screen coordinates
 494  *
 495  * Params:
 496  *  This: Device to activate the context for
 497  *  context: Context to setup
 498  *  width: render target width
 499  *  height: render target height
 500  *
 501  *****************************************************************************/
 502 static inline void SetupForBlit(IWineD3DDeviceImpl *This, WineD3DContext *context, UINT width, UINT height) {
 503     int i;
 504
 505     TRACE("Setting up context %p for blitting\n", context);
 506     if(context->last_was_blit) {
 507         TRACE("Context is already set up for blitting, nothing to do\n");
 508         return;
 509     }
 510     context->last_was_blit = TRUE;
 511
 512     /* TODO: Use a display list */
 513
 514     /* Disable shaders */
 515     This->shader_backend->shader_cleanup((IWineD3DDevice *) This);
 516     Context_MarkStateDirty(context, STATE_VSHADER);
 517     Context_MarkStateDirty(context, STATE_PIXELSHADER);
 518
 519     /* Disable all textures. The caller can then bind a texture it wants to blit
 520      * from
 521      */
 522     if(GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 523         glDisable(GL_REGISTER_COMBINERS_NV);
 524         checkGLcall("glDisable(GL_REGISTER_COMBINERS_NV)");
 525     }
 526     if (GL_SUPPORT(ARB_MULTITEXTURE)) {
 527         /* The blitting code uses (for now) the fixed function pipeline, so make sure to reset all fixed
 528          * function texture unit. No need to care for higher samplers
 529          */
 530         for(i = GL_LIMITS(textures) - 1; i > 0 ; i--) {
 531             GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB + i));
 532             checkGLcall("glActiveTextureARB");
 533
 534             if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 535                 glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 536                 checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 537             }
 538             glDisable(GL_TEXTURE_3D);
 539             checkGLcall("glDisable GL_TEXTURE_3D");
 540             glDisable(GL_TEXTURE_2D);
 541             checkGLcall("glDisable GL_TEXTURE_2D");
 542
 543             glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 544             checkGLcall("glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);");
 545
 546             Context_MarkStateDirty(context, STATE_TEXTURESTAGE(i, WINED3DTSS_COLOROP));
 547             Context_MarkStateDirty(context, STATE_SAMPLER(i));
 548         }
 549         GL_EXTCALL(glActiveTextureARB(GL_TEXTURE0_ARB));
 550         checkGLcall("glActiveTextureARB");
 551     }
 552     if(GL_SUPPORT(ARB_TEXTURE_CUBE_MAP)) {
 553         glDisable(GL_TEXTURE_CUBE_MAP_ARB);
 554         checkGLcall("glDisable GL_TEXTURE_CUBE_MAP_ARB");
 555     }
 556     glDisable(GL_TEXTURE_3D);
 557     checkGLcall("glDisable GL_TEXTURE_3D");
 558     glDisable(GL_TEXTURE_2D);
 559     checkGLcall("glDisable GL_TEXTURE_2D");
 560
 561     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 562
 563     glMatrixMode(GL_TEXTURE);
 564     checkGLcall("glMatrixMode(GL_TEXTURE)");
 565     glLoadIdentity();
 566     checkGLcall("glLoadIdentity()");
 567     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_TEXTURE0));
 568
 569     if (GL_SUPPORT(EXT_TEXTURE_LOD_BIAS)) {
 570         glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT,
 571                   GL_TEXTURE_LOD_BIAS_EXT,
 572                   0.0);
 573         checkGLcall("glTexEnvi GL_TEXTURE_LOD_BIAS_EXT ...");
 574     }
 575     Context_MarkStateDirty(context, STATE_SAMPLER(0));
 576     Context_MarkStateDirty(context, STATE_TEXTURESTAGE(0, WINED3DTSS_COLOROP));
 577
 578     /* Other misc states */
 579     glDisable(GL_ALPHA_TEST);
 580     checkGLcall("glDisable(GL_ALPHA_TEST)");
 581     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHATESTENABLE));
 582     glDisable(GL_LIGHTING);
 583     checkGLcall("glDisable GL_LIGHTING");
 584     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_LIGHTING));
 585     glDisable(GL_DEPTH_TEST);
 586     checkGLcall("glDisable GL_DEPTH_TEST");
 587     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ZENABLE));
 588     glDisable(GL_FOG);
 589     checkGLcall("glDisable GL_FOG");
 590     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_FOGENABLE));
 591     glDisable(GL_BLEND);
 592     checkGLcall("glDisable GL_BLEND");
 593     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 594     glDisable(GL_CULL_FACE);
 595     checkGLcall("glDisable GL_CULL_FACE");
 596     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CULLMODE));
 597     glDisable(GL_STENCIL_TEST);
 598     checkGLcall("glDisable GL_STENCIL_TEST");
 599     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_STENCILENABLE));
 600     glDisable(GL_SCISSOR_TEST);
 601     checkGLcall("glDisable GL_SCISSOR_TEST");
 602     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 603     if(GL_SUPPORT(ARB_POINT_SPRITE)) {
 604         glDisable(GL_POINT_SPRITE_ARB);
 605         checkGLcall("glDisable GL_POINT_SPRITE_ARB");
 606         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_POINTSPRITEENABLE));
 607     }
 608     glColorMask(GL_TRUE, GL_TRUE,GL_TRUE,GL_TRUE);
 609     checkGLcall("glColorMask");
 610     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 611     if (GL_SUPPORT(EXT_SECONDARY_COLOR)) {
 612         glDisable(GL_COLOR_SUM_EXT);
 613         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 614         checkGLcall("glDisable(GL_COLOR_SUM_EXT)");
 615     }
 616     if (GL_SUPPORT(NV_REGISTER_COMBINERS)) {
 617         GL_EXTCALL(glFinalCombinerInputNV(GL_VARIABLE_B_NV, GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB));
 618         Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SPECULARENABLE));
 619         checkGLcall("glFinalCombinerInputNV");
 620     }
 621
 622     /* Setup transforms */
 623     glMatrixMode(GL_MODELVIEW);
 624     checkGLcall("glMatrixMode(GL_MODELVIEW)");
 625     glLoadIdentity();
 626     checkGLcall("glLoadIdentity()");
 627     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_WORLDMATRIX(0)));
 628
 629     glMatrixMode(GL_PROJECTION);
 630     checkGLcall("glMatrixMode(GL_PROJECTION)");
 631     glLoadIdentity();
 632     checkGLcall("glLoadIdentity()");
 633     glOrtho(0, width, height, 0, 0.0, -1.0);
 634     checkGLcall("glOrtho");
 635     Context_MarkStateDirty(context, STATE_TRANSFORM(WINED3DTS_PROJECTION));
 636
 637     context->last_was_rhw = TRUE;
 638     Context_MarkStateDirty(context, STATE_VDECL); /* because of last_was_rhw = TRUE */
 639
 640     glDisable(GL_CLIP_PLANE0); checkGLcall("glDisable(clip plane 0)");
 641     glDisable(GL_CLIP_PLANE1); checkGLcall("glDisable(clip plane 1)");
 642     glDisable(GL_CLIP_PLANE2); checkGLcall("glDisable(clip plane 2)");
 643     glDisable(GL_CLIP_PLANE3); checkGLcall("glDisable(clip plane 3)");
 644     glDisable(GL_CLIP_PLANE4); checkGLcall("glDisable(clip plane 4)");
 645     glDisable(GL_CLIP_PLANE5); checkGLcall("glDisable(clip plane 5)");
 646     Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_CLIPPING));
 647
 648     glViewport(0, 0, width, height);
 649     checkGLcall("glViewport");
 650     Context_MarkStateDirty(context, STATE_VIEWPORT);
 651
 652     if(GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 653         glDisable(GL_TEXTURE_SHADER_NV);
 654         checkGLcall("glDisable(GL_TEXTURE_SHADER_NV)");
 655     }
 656 }
 657
 658 /*****************************************************************************
 659  * findThreadContextForSwapChain
 660  *
 661  * Searches a swapchain for all contexts and picks one for the thread tid.
 662  * If none can be found the swapchain is requested to create a new context
 663  *
 664  *****************************************************************************/
 665 static WineD3DContext *findThreadContextForSwapChain(IWineD3DSwapChain *swapchain, DWORD tid) {
 666     int i;
 667
 668     for(i = 0; i < ((IWineD3DSwapChainImpl *) swapchain)->num_contexts; i++) {
 669         if(((IWineD3DSwapChainImpl *) swapchain)->context[i]->tid == tid) {
 670             return ((IWineD3DSwapChainImpl *) swapchain)->context[i];
 671         }
 672
 673     }
 674
 675     /* Create a new context for the thread */
 676     return IWineD3DSwapChainImpl_CreateContextForThread(swapchain);
 677 }
 678
 679 /*****************************************************************************
 680  * FindContext
 681  *
 682  * Finds a context for the current render target and thread
 683  *
 684  * Parameters:
 685  *  target: Render target to find the context for
 686  *  tid: Thread to activate the context for
 687  *
 688  * Returns: The needed context
 689  *
 690  *****************************************************************************/
 691 static inline WineD3DContext *FindContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, DWORD tid, GLint *buffer) {
 692     IWineD3DSwapChain *swapchain = NULL;
 693     HRESULT hr;
 694     BOOL readTexture = wined3d_settings.offscreen_rendering_mode != ORM_FBO && This->render_offscreen;
 695     WineD3DContext *context = This->activeContext;
 696     BOOL oldRenderOffscreen = This->render_offscreen;
 697     const WINED3DFORMAT oldFmt = ((IWineD3DSurfaceImpl *) This->lastActiveRenderTarget)->resource.format;
 698     const WINED3DFORMAT newFmt = ((IWineD3DSurfaceImpl *) target)->resource.format;
 699
 700     /* To compensate the lack of format switching with some offscreen rendering methods and on onscreen buffers
 701      * the alpha blend state changes with different render target formats
 702      */
 703     if(oldFmt != newFmt) {
 704         const StaticPixelFormatDesc *old = getFormatDescEntry(oldFmt, NULL, NULL);
 705         const StaticPixelFormatDesc *new = getFormatDescEntry(oldFmt, NULL, NULL);
 706
 707         if((old->alphaMask && !new->alphaMask) || (!old->alphaMask && new->alphaMask)) {
 708             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_ALPHABLENDENABLE));
 709         }
 710     }
 711
 712     hr = IWineD3DSurface_GetContainer(target, &IID_IWineD3DSwapChain, (void **) &swapchain);
 713     if(hr == WINED3D_OK && swapchain) {
 714         TRACE("Rendering onscreen\n");
 715
 716         context = findThreadContextForSwapChain(swapchain, tid);
 717
 718         This->render_offscreen = FALSE;
 719         /* The context != This->activeContext will catch a NOP context change. This can occur
 720          * if we are switching back to swapchain rendering in case of FBO or Back Buffer offscreen
 721          * rendering. No context change is needed in that case
 722          */
 723
 724         if(((IWineD3DSwapChainImpl *) swapchain)->frontBuffer == target) {
 725             *buffer = GL_FRONT;
 726         } else {
 727             *buffer = GL_BACK;
 728         }
 729         if(wined3d_settings.offscreen_rendering_mode == ORM_PBUFFER) {
 730             if(This->pbufferContext && tid == This->pbufferContext->tid) {
 731                 This->pbufferContext->tid = 0;
 732             }
 733         }
 734         IWineD3DSwapChain_Release(swapchain);
 735
 736         if(oldRenderOffscreen) {
 737             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 738             Context_MarkStateDirty(context, STATE_VDECL);
 739             Context_MarkStateDirty(context, STATE_VIEWPORT);
 740             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 741             Context_MarkStateDirty(context, STATE_FRONTFACE);
 742         }
 743
 744     } else {
 745         TRACE("Rendering offscreen\n");
 746         This->render_offscreen = TRUE;
 747         *buffer = This->offscreenBuffer;
 748
 749         switch(wined3d_settings.offscreen_rendering_mode) {
 750             case ORM_FBO:
 751                 /* FBOs do not need a different context. Stay with whatever context is active at the moment */
 752                 if(This->activeContext && tid == This->lastThread) {
 753                     context = This->activeContext;
 754                 } else {
 755                     /* This may happen if the app jumps straight into offscreen rendering
 756                      * Start using the context of the primary swapchain. tid == 0 is no problem
 757                      * for findThreadContextForSwapChain.
 758                      *
 759                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 760                      * is perfect to call.
 761                      */
 762                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 763                 }
 764                 break;
 765
 766             case ORM_PBUFFER:
 767             {
 768                 IWineD3DSurfaceImpl *targetimpl = (IWineD3DSurfaceImpl *) target;
 769                 if(This->pbufferContext == NULL ||
 770                    This->pbufferWidth < targetimpl->currentDesc.Width ||
 771                    This->pbufferHeight < targetimpl->currentDesc.Height) {
 772                     if(This->pbufferContext) {
 773                         DestroyContext(This, This->pbufferContext);
 774                     }
 775
 776                     /* The display is irrelevant here, the window is 0. But CreateContext needs a valid X connection.
 777                      * Create the context on the same server as the primary swapchain. The primary swapchain is exists at this point.
 778                      */
 779                     This->pbufferContext = CreateContext(This, targetimpl,
 780                             ((IWineD3DSwapChainImpl *) This->swapchains[0])->context[0]->win_handle,
 781                             TRUE /* pbuffer */, &((IWineD3DSwapChainImpl *)This->swapchains[0])->presentParms);
 782                     This->pbufferWidth = targetimpl->currentDesc.Width;
 783                     This->pbufferHeight = targetimpl->currentDesc.Height;
 784                    }
 785
 786                    if(This->pbufferContext) {
 787                        if(This->pbufferContext->tid != 0 && This->pbufferContext->tid != tid) {
 788                            FIXME("The PBuffr context is only supported for one thread for now!\n");
 789                        }
 790                        This->pbufferContext->tid = tid;
 791                        context = This->pbufferContext;
 792                        break;
 793                    } else {
 794                        ERR("Failed to create a buffer context and drawable, falling back to back buffer offscreen rendering\n");
 795                        wined3d_settings.offscreen_rendering_mode = ORM_BACKBUFFER;
 796                    }
 797             }
 798
 799             case ORM_BACKBUFFER:
 800                 /* Stay with the currently active context for back buffer rendering */
 801                 if(This->activeContext && tid == This->lastThread) {
 802                     context = This->activeContext;
 803                 } else {
 804                     /* This may happen if the app jumps straight into offscreen rendering
 805                      * Start using the context of the primary swapchain. tid == 0 is no problem
 806                      * for findThreadContextForSwapChain.
 807                      *
 808                      * Can also happen on thread switches - in that case findThreadContextForSwapChain
 809                      * is perfect to call.
 810                      */
 811                     context = findThreadContextForSwapChain(This->swapchains[0], tid);
 812                 }
 813                 break;
 814         }
 815
 816         if (wined3d_settings.offscreen_rendering_mode != ORM_FBO) {
 817             /* Make sure we have a OpenGL texture name so the PreLoad() used to read the buffer
 818              * back when we are done won't mark us dirty.
 819              */
 820             IWineD3DSurface_PreLoad(target);
 821         }
 822
 823         if(!oldRenderOffscreen) {
 824             Context_MarkStateDirty(context, WINED3DTS_PROJECTION);
 825             Context_MarkStateDirty(context, STATE_VDECL);
 826             Context_MarkStateDirty(context, STATE_VIEWPORT);
 827             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 828             Context_MarkStateDirty(context, STATE_FRONTFACE);
 829         }
 830     }
 831     if (readTexture) {
 832         BOOL oldInDraw = This->isInDraw;
 833
 834         /* PreLoad requires a context to load the texture, thus it will call ActivateContext.
 835          * Set the isInDraw to true to signal PreLoad that it has a context. Will be tricky
 836          * when using offscreen rendering with multithreading
 837          */
 838         This->isInDraw = TRUE;
 839
 840         /* Do that before switching the context:
 841          * Read the back buffer of the old drawable into the destination texture
 842          */
 843         IWineD3DSurface_PreLoad(This->lastActiveRenderTarget);
 844
 845         /* Assume that the drawable will be modified by some other things now */
 846         IWineD3DSurface_ModifyLocation(This->lastActiveRenderTarget, SFLAG_INDRAWABLE, FALSE);
 847
 848         This->isInDraw = oldInDraw;
 849     }
 850
 851     if(oldRenderOffscreen != This->render_offscreen && This->depth_copy_state != WINED3D_DCS_NO_COPY) {
 852         This->depth_copy_state = WINED3D_DCS_COPY;
 853     }
 854     return context;
 855 }
 856
 857 /*****************************************************************************
 858  * ActivateContext
 859  *
 860  * Finds a rendering context and drawable matching the device and render
 861  * target for the current thread, activates them and puts them into the
 862  * requested state.
 863  *
 864  * Params:
 865  *  This: Device to activate the context for
 866  *  target: Requested render target
 867  *  usage: Prepares the context for blitting, drawing or other actions
 868  *
 869  *****************************************************************************/
 870 void ActivateContext(IWineD3DDeviceImpl *This, IWineD3DSurface *target, ContextUsage usage) {
 871     DWORD                         tid = GetCurrentThreadId();
 872     int                           i;
 873     DWORD                         dirtyState, idx;
 874     BYTE                          shift;
 875     WineD3DContext                *context;
 876     GLint                         drawBuffer=0;
 877
 878     TRACE("(%p): Selecting context for render target %p, thread %d\n", This, target, tid);
 879     if(This->lastActiveRenderTarget != target || tid != This->lastThread) {
 880         context = FindContext(This, target, tid, &drawBuffer);
 881         This->lastActiveRenderTarget = target;
 882         This->lastThread = tid;
 883     } else {
 884         /* Stick to the old context */
 885         context = This->activeContext;
 886     }
 887
 888     /* Activate the opengl context */
 889     if(context != This->activeContext) {
 890         BOOL ret;
 891
 892         /* Prevent an unneeded context switch as those are expensive */
 893         if(context->glCtx && (context->glCtx == pwglGetCurrentContext())) {
 894             TRACE("Already using gl context %p\n", context->glCtx);
 895         }
 896         else {
 897             TRACE("Switching gl ctx to %p, hdc=%p ctx=%p\n", context, context->hdc, context->glCtx);
 898             ret = pwglMakeCurrent(context->hdc, context->glCtx);
 899             if(ret == FALSE) {
 900                 ERR("Failed to activate the new context\n");
 901             }
 902         }
 903         This->activeContext = context;
 904     }
 905
 906     /* We only need ENTER_GL for the gl calls made below and for the helper functions which make GL calls */
 907     ENTER_GL();
 908     /* Select the right draw buffer. It is selected in FindContext. */
 909     if(drawBuffer && context->last_draw_buffer != drawBuffer) {
 910         TRACE("Drawing to buffer: %#x\n", drawBuffer);
 911         context->last_draw_buffer = drawBuffer;
 912
 913         glDrawBuffer(drawBuffer);
 914         checkGLcall("glDrawBuffer");
 915     }
 916
 917     switch(usage) {
 918         case CTXUSAGE_RESOURCELOAD:
 919             /* This does not require any special states to be set up */
 920             break;
 921
 922         case CTXUSAGE_CLEAR:
 923             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 924                 glEnable(GL_TEXTURE_SHADER_NV);
 925                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 926             }
 927
 928             glEnable(GL_SCISSOR_TEST);
 929             checkGLcall("glEnable GL_SCISSOR_TEST");
 930             context->last_was_blit = FALSE;
 931             Context_MarkStateDirty(context, STATE_RENDER(WINED3DRS_SCISSORTESTENABLE));
 932             Context_MarkStateDirty(context, STATE_SCISSORRECT);
 933             break;
 934
 935         case CTXUSAGE_DRAWPRIM:
 936             /* This needs all dirty states applied */
 937             if(context->last_was_blit && GL_SUPPORT(NV_TEXTURE_SHADER2)) {
 938                 glEnable(GL_TEXTURE_SHADER_NV);
 939                 checkGLcall("glEnable(GL_TEXTURE_SHADER_NV)");
 940             }
 941
 942             IWineD3DDeviceImpl_FindTexUnitMap(This);
 943
 944             for(i=0; i < context->numDirtyEntries; i++) {
 945                 dirtyState = context->dirtyArray[i];
 946                 idx = dirtyState >> 5;
 947                 shift = dirtyState & 0x1f;
 948                 context->isStateDirty[idx] &= ~(1 << shift);
 949                 StateTable[dirtyState].apply(dirtyState, This->stateBlock, context);
 950             }
 951             context->numDirtyEntries = 0; /* This makes the whole list clean */
 952             context->last_was_blit = FALSE;
 953             break;
 954
 955         case CTXUSAGE_BLIT:
 956             SetupForBlit(This, context,
 957                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Width,
 958                          ((IWineD3DSurfaceImpl *)target)->currentDesc.Height);
 959             break;
 960
 961         default:
 962             FIXME("Unexpected context usage requested\n");
 963     }
 964     LEAVE_GL();
 965 }