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   1 /*
   2  * freeglut_window.c
   3  *
   4  * Window management methods.
   5  *
   6  * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
   7  * Written by Pawel W. Olszta, <olszta@sourceforge.net>
   8  * Creation date: Fri Dec 3 1999
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a
  11  * copy of this software and associated documentation files (the "Software"),
  12  * to deal in the Software without restriction, including without limitation
  13  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14  * and/or sell copies of the Software, and to permit persons to whom the
  15  * Software is furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included
  18  * in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  24  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  25  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include <GL/freeglut.h>
  29 #include "freeglut_internal.h"
  30
  31 #if TARGET_HOST_POSIX_X11
  32 #include <limits.h>  /* LONG_MAX */
  33 #endif
  34
  35 #if defined(_WIN32_WCE)
  36 #   include <Aygshell.h>
  37 #   ifdef FREEGLUT_LIB_PRAGMAS
  38 #       pragma comment( lib, "Aygshell.lib" )
  39 #   endif
  40
  41 static wchar_t* fghWstrFromStr(const char* str)
  42 {
  43     int i,len=strlen(str);
  44     wchar_t* wstr = (wchar_t*)malloc(2*len+2);
  45     for(i=0; i<len; i++)
  46         wstr[i] = str[i];
  47     wstr[len] = 0;
  48     return wstr;
  49 }
  50
  51 #endif /* defined(_WIN32_WCE) */
  52
  53 /*
  54  * TODO BEFORE THE STABLE RELEASE:
  55  *
  56  *  fgChooseFBConfig()      -- OK, but what about glutInitDisplayString()?
  57  *  fgSetupPixelFormat      -- ignores the display mode settings
  58  *  fgOpenWindow()          -- check the Win32 version, -iconic handling!
  59  *  fgCloseWindow()         -- check the Win32 version
  60  *  glutCreateWindow()      -- Check when default position and size is {-1,-1}
  61  *  glutCreateSubWindow()   -- Check when default position and size is {-1,-1}
  62  *  glutDestroyWindow()     -- check the Win32 version
  63  *  glutSetWindow()         -- check the Win32 version
  64  *  glutGetWindow()         -- OK
  65  *  glutSetWindowTitle()    -- check the Win32 version
  66  *  glutSetIconTitle()      -- check the Win32 version
  67  *  glutShowWindow()        -- check the Win32 version
  68  *  glutHideWindow()        -- check the Win32 version
  69  *  glutIconifyWindow()     -- check the Win32 version
  70  *  glutReshapeWindow()     -- check the Win32 version
  71  *  glutPositionWindow()    -- check the Win32 version
  72  *  glutPushWindow()        -- check the Win32 version
  73  *  glutPopWindow()         -- check the Win32 version
  74  */
  75
  76 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
  77
  78 /*
  79  * Chooses a visual basing on the current display mode settings
  80  */
  81 #if TARGET_HOST_POSIX_X11
  82
  83 GLXFBConfig* fgChooseFBConfig( void )
  84 {
  85     GLboolean wantIndexedMode = GL_FALSE;
  86     int attributes[ 32 ];
  87     int where = 0;
  88
  89     /* First we have to process the display mode settings... */
  90 /*
  91  * XXX Why is there a semi-colon in this #define?  The code
  92  * XXX that uses the macro seems to always add more semicolons...
  93  */
  94 #define ATTRIB(a) attributes[where++]=a;
  95 #define ATTRIB_VAL(a,v) {ATTRIB(a); ATTRIB(v);}
  96
  97     if( fgState.DisplayMode & GLUT_INDEX )
  98     {
  99         ATTRIB_VAL( GLX_BUFFER_SIZE, 8 );
 100         /*  Buffer size is selected later.  */
 101
 102         ATTRIB_VAL( GLX_RENDER_TYPE, GLX_COLOR_INDEX_BIT );
 103         wantIndexedMode = GL_TRUE;
 104     }
 105     else
 106     {
 107         ATTRIB_VAL( GLX_RED_SIZE,   1 );
 108         ATTRIB_VAL( GLX_GREEN_SIZE, 1 );
 109         ATTRIB_VAL( GLX_BLUE_SIZE,  1 );
 110         if( fgState.DisplayMode & GLUT_ALPHA )
 111             ATTRIB_VAL( GLX_ALPHA_SIZE, 1 );
 112     }
 113
 114     if( fgState.DisplayMode & GLUT_DOUBLE )
 115         ATTRIB_VAL( GLX_DOUBLEBUFFER, True );
 116
 117     if( fgState.DisplayMode & GLUT_STEREO )
 118         ATTRIB_VAL( GLX_STEREO, True );
 119
 120     if( fgState.DisplayMode & GLUT_DEPTH )
 121         ATTRIB_VAL( GLX_DEPTH_SIZE, 1 );
 122
 123     if( fgState.DisplayMode & GLUT_STENCIL )
 124         ATTRIB_VAL( GLX_STENCIL_SIZE, 1 );
 125
 126     if( fgState.DisplayMode & GLUT_ACCUM )
 127     {
 128         ATTRIB_VAL( GLX_ACCUM_RED_SIZE,   1 );
 129         ATTRIB_VAL( GLX_ACCUM_GREEN_SIZE, 1 );
 130         ATTRIB_VAL( GLX_ACCUM_BLUE_SIZE,  1 );
 131         if( fgState.DisplayMode & GLUT_ALPHA )
 132             ATTRIB_VAL( GLX_ACCUM_ALPHA_SIZE, 1 );
 133     }
 134
 135     if ((fgState.DisplayMode & GLUT_AUX)
 136      || (fgState.DisplayMode & GLUT_AUX1)
 137      || (fgState.DisplayMode & GLUT_AUX2)
 138      || (fgState.DisplayMode & GLUT_AUX3)
 139      || (fgState.DisplayMode & GLUT_AUX4))
 140       {
 141         ATTRIB_VAL(GLX_AUX_BUFFERS, fgState.AuxiliaryBufferNumber)
 142       }
 143
 144     if (fgState.DisplayMode & GLUT_MULTISAMPLE)
 145       {
 146         ATTRIB_VAL(GLX_SAMPLE_BUFFERS, 1)
 147         ATTRIB_VAL(GLX_SAMPLES, fgState.SampleNumber)
 148       }
 149
 150     /* Push a null at the end of the list */
 151     ATTRIB( None );
 152
 153     {
 154         GLXFBConfig * fbconfigArray;  /*  Array of FBConfigs  */
 155         GLXFBConfig * fbconfig;       /*  The FBConfig we want  */
 156         int fbconfigArraySize;        /*  Number of FBConfigs in the array  */
 157
 158
 159         /*  Get all FBConfigs that match "attributes".  */
 160         fbconfigArray = glXChooseFBConfig( fgDisplay.Display,
 161                                            fgDisplay.Screen,
 162                                            attributes,
 163                                            &fbconfigArraySize );
 164
 165         if (fbconfigArray != NULL)
 166         {
 167             int result;  /* Returned by glXGetFBConfigAttrib, not checked. */
 168
 169
 170             if( wantIndexedMode )
 171             {
 172                 /*
 173                  * In index mode, we want the largest buffer size, i.e. visual
 174                  * depth.  Here, FBConfigs are sorted by increasing buffer size
 175                  * first, so FBConfigs with the largest size come last.
 176                  */
 177
 178                 int bufferSizeMin, bufferSizeMax;
 179
 180                 /*  Get bufferSizeMin.  */
 181                 result =
 182                   glXGetFBConfigAttrib( fgDisplay.Display,
 183                                         fbconfigArray[0],
 184                                         GLX_BUFFER_SIZE,
 185                                         &bufferSizeMin );
 186                 /*  Get bufferSizeMax.  */
 187                 result =
 188                   glXGetFBConfigAttrib( fgDisplay.Display,
 189                                         fbconfigArray[fbconfigArraySize - 1],
 190                                         GLX_BUFFER_SIZE,
 191                                         &bufferSizeMax );
 192
 193                 if (bufferSizeMax > bufferSizeMin)
 194                 {
 195                     /*
 196                      * Free and reallocate fbconfigArray, keeping only FBConfigs
 197                      * with the largest buffer size.
 198                      */
 199                     XFree(fbconfigArray);
 200
 201                     /*  Add buffer size token at the end of the list.  */
 202                     where--;
 203                     ATTRIB_VAL( GLX_BUFFER_SIZE, bufferSizeMax );
 204                     ATTRIB( None );
 205
 206                     fbconfigArray = glXChooseFBConfig( fgDisplay.Display,
 207                                                        fgDisplay.Screen,
 208                                                        attributes,
 209                                                        &fbconfigArraySize );
 210                 }
 211             }
 212
 213             /*
 214              * We now have an array of FBConfigs, the first one being the "best"
 215              * one.  So we should return only this FBConfig:
 216              *
 217              * int fbconfigXID;
 218              *
 219              *  - pick the XID of the FBConfig we want
 220              * result = glXGetFBConfigAttrib( fgDisplay.Display,
 221              *                                fbconfigArray[0],
 222              *                                GLX_FBCONFIG_ID,
 223              *                                &fbconfigXID );
 224              *
 225              * - free the array
 226              * XFree(fbconfigArray);
 227              *
 228              * - reset "attributes" with the XID
 229              * where = 0;
 230              * ATTRIB_VAL( GLX_FBCONFIG_ID, fbconfigXID );
 231              * ATTRIB( None );
 232              *
 233              * - get our FBConfig only
 234              * fbconfig = glXChooseFBConfig( fgDisplay.Display,
 235              *                               fgDisplay.Screen,
 236              *                               attributes,
 237              *                               &fbconfigArraySize );
 238              *
 239              * However, for some configurations (for instance multisampling with
 240              * Mesa 6.5.2 and ATI drivers), this does not work:
 241              * glXChooseFBConfig returns NULL, whereas fbconfigXID is a valid
 242              * XID.  Further investigation is needed.
 243              *
 244              * So, for now, we return the whole array of FBConfigs.  This should
 245              * not produce any side effects elsewhere.
 246              */
 247             fbconfig = fbconfigArray;
 248         }
 249         else
 250         {
 251            fbconfig = NULL;
 252         }
 253
 254         return fbconfig;
 255     }
 256 }
 257 #endif /* TARGET_HOST_POSIX_X11 */
 258
 259 /*
 260  * Setup the pixel format for a Win32 window
 261  */
 262 #if TARGET_HOST_MS_WINDOWS
 263 /* The following include file is available from SGI but is not standard:
 264  *   #include <GL/wglext.h>
 265  * So we copy the necessary parts out of it.
 266  * XXX: should local definitions for extensions be put in a separate include file?
 267  */
 268 typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
 269
 270 typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
 271
 272 #define WGL_DRAW_TO_WINDOW_ARB         0x2001
 273 #define WGL_ACCELERATION_ARB           0x2003
 274 #define WGL_SUPPORT_OPENGL_ARB         0x2010
 275 #define WGL_DOUBLE_BUFFER_ARB          0x2011
 276 #define WGL_COLOR_BITS_ARB             0x2014
 277 #define WGL_ALPHA_BITS_ARB             0x201B
 278 #define WGL_DEPTH_BITS_ARB             0x2022
 279 #define WGL_STENCIL_BITS_ARB           0x2023
 280 #define WGL_FULL_ACCELERATION_ARB      0x2027
 281
 282 #define WGL_SAMPLE_BUFFERS_ARB         0x2041
 283 #define WGL_SAMPLES_ARB                0x2042
 284
 285
 286 #ifndef WGL_ARB_create_context
 287 #define WGL_ARB_create_context 1
 288 #ifdef WGL_WGLEXT_PROTOTYPES
 289 extern HGLRC WINAPI wglCreateContextAttribsARB (HDC, HGLRC, const int *);
 290 #endif /* WGL_WGLEXT_PROTOTYPES */
 291 typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC) (HDC hDC, HGLRC hShareContext, const int *attribList);
 292
 293 #define WGL_CONTEXT_DEBUG_BIT_ARB      0x0001
 294 #define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
 295 #define WGL_CONTEXT_MAJOR_VERSION_ARB  0x2091
 296 #define WGL_CONTEXT_MINOR_VERSION_ARB  0x2092
 297 #define WGL_CONTEXT_LAYER_PLANE_ARB    0x2093
 298 #define WGL_CONTEXT_FLAGS_ARB          0x2094
 299 #define ERROR_INVALID_VERSION_ARB      0x2095
 300 #endif
 301
 302
 303 GLboolean fgNewWGLCreateContext( SFG_Window* window )
 304 {
 305     if( (fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) &&
 306         (fgState.MajorVersion > 2) )
 307     {
 308         PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB=NULL;
 309
 310         wglMakeCurrent( window->Window.Device,
 311                         window->Window.Context );
 312
 313         wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
 314         if (wglGetEntensionsStringARB)
 315         {
 316             const char * pWglExtString=wglGetEntensionsStringARB(window->Window.Device);
 317             if (pWglExtString)
 318             {
 319                 if (strstr(pWglExtString, "WGL_ARB_create_context"))
 320                 {
 321                     /* new context creation */
 322                     HGLRC context;
 323                     int attribs[7];
 324                     PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
 325
 326                     attribs[0] = WGL_CONTEXT_MAJOR_VERSION_ARB;
 327                     attribs[1] = fgState.MajorVersion;
 328                     attribs[2] = WGL_CONTEXT_MINOR_VERSION_ARB;
 329                     attribs[3] = fgState.MinorVersion;
 330                     attribs[4] = WGL_CONTEXT_FLAGS_ARB;
 331                     attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? WGL_CONTEXT_DEBUG_BIT_ARB : 0) |
 332                         ((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
 333                     attribs[6] = 0;
 334
 335                     wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
 336                     if ( wglCreateContextAttribsARB == NULL )
 337                     {
 338                         fgError( "wglCreateContextAttribsARB not found" );
 339                     }
 340
 341                     context = wglCreateContextAttribsARB( window->Window.Device, 0, attribs );
 342                     if ( context == NULL )
 343                     {
 344                         fgError( "Unable to create OpenGL %d.%d context (flags %x)",
 345                             fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
 346                     }
 347                     else
 348                     {
 349                         fgWarning( "Success 3.0" );
 350                         wglMakeCurrent( NULL, NULL );
 351                         wglDeleteContext( window->Window.Context );
 352                         window->Window.Context = context;
 353                     }
 354                 }
 355             }
 356         }
 357     }
 358
 359     return GL_TRUE;
 360 }
 361
 362
 363 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
 364                               unsigned char layer_type )
 365 {
 366 #if defined(_WIN32_WCE)
 367     return GL_TRUE;
 368 #else
 369     PIXELFORMATDESCRIPTOR* ppfd, pfd;
 370     int flags, pixelformat;
 371
 372     freeglut_return_val_if_fail( window != NULL, 0 );
 373     flags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
 374     if( fgState.DisplayMode & GLUT_DOUBLE )
 375         flags |= PFD_DOUBLEBUFFER;
 376
 377     if( fgState.DisplayMode & GLUT_STEREO )
 378         flags |= PFD_STEREO;
 379
 380 #if defined(_MSC_VER)
 381 #pragma message( "fgSetupPixelFormat(): there is still some work to do here!" )
 382 #endif
 383
 384     /* Specify which pixel format do we opt for... */
 385     pfd.nSize           = sizeof(PIXELFORMATDESCRIPTOR);
 386     pfd.nVersion        = 1;
 387     pfd.dwFlags         = flags;
 388
 389     if( fgState.DisplayMode & GLUT_INDEX )
 390     {
 391         pfd.iPixelType = PFD_TYPE_COLORINDEX;
 392         pfd.cRedBits                = 0;
 393         pfd.cGreenBits            = 0;
 394         pfd.cBlueBits             = 0;
 395         pfd.cAlphaBits            = 0;
 396     }
 397     else
 398     {
 399         pfd.iPixelType      = PFD_TYPE_RGBA;
 400         pfd.cRedBits                = 8;
 401         pfd.cGreenBits            = 8;
 402         pfd.cBlueBits             = 8;
 403         if ( fgState.DisplayMode & GLUT_ALPHA )
 404             pfd.cAlphaBits            = 8;
 405         else
 406             pfd.cAlphaBits            = 0;
 407     }
 408
 409     pfd.cColorBits      = 24;
 410     pfd.cRedShift       = 0;
 411     pfd.cGreenShift     = 0;
 412     pfd.cBlueShift      = 0;
 413     pfd.cAlphaShift     = 0;
 414     pfd.cAccumBits      = 0;
 415     pfd.cAccumRedBits   = 0;
 416     pfd.cAccumGreenBits = 0;
 417     pfd.cAccumBlueBits  = 0;
 418     pfd.cAccumAlphaBits = 0;
 419 #if 0
 420     pfd.cDepthBits      = 32;
 421     pfd.cStencilBits    = 0;
 422 #else
 423     pfd.cDepthBits      = 24;
 424     pfd.cStencilBits    = 8;
 425 #endif
 426     if( fgState.DisplayMode & GLUT_AUX4 )
 427         pfd.cAuxBuffers = 4;
 428     else if( fgState.DisplayMode & GLUT_AUX3 )
 429         pfd.cAuxBuffers = 3;
 430     else if( fgState.DisplayMode & GLUT_AUX2 )
 431         pfd.cAuxBuffers = 2;
 432     else if( fgState.DisplayMode & GLUT_AUX1 )
 433         pfd.cAuxBuffers = 1;
 434     else
 435         pfd.cAuxBuffers = 0;
 436
 437     pfd.iLayerType      = layer_type;
 438     pfd.bReserved       = 0;
 439     pfd.dwLayerMask     = 0;
 440     pfd.dwVisibleMask   = 0;
 441     pfd.dwDamageMask    = 0;
 442
 443     pfd.cColorBits = (BYTE) GetDeviceCaps( window->Window.Device, BITSPIXEL );
 444     ppfd = &pfd;
 445
 446     pixelformat = ChoosePixelFormat( window->Window.Device, ppfd );
 447
 448     /* windows hack for multismapling */
 449     if (fgState.DisplayMode&GLUT_MULTISAMPLE)
 450     {
 451         PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB=NULL;
 452         HGLRC rc, rc_before=wglGetCurrentContext();
 453         HWND hWnd;
 454         HDC hDC, hDC_before=wglGetCurrentDC();
 455         WNDCLASS wndCls;
 456
 457         /* create a dummy window */
 458         ZeroMemory(&wndCls, sizeof(wndCls));
 459         wndCls.lpfnWndProc = DefWindowProc;
 460         wndCls.hInstance = fgDisplay.Instance;
 461         wndCls.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
 462         wndCls.lpszClassName = _T("FREEGLUT_dummy");
 463         RegisterClass( &wndCls );
 464
 465         hWnd=CreateWindow(_T("FREEGLUT_dummy"), _T(""), WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW , 0,0,0,0, 0, 0, fgDisplay.Instance, 0 );
 466         hDC=GetDC(hWnd);
 467         SetPixelFormat( hDC, pixelformat, ppfd );
 468
 469         rc = wglCreateContext( hDC );
 470         wglMakeCurrent(hDC, rc);
 471
 472         wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
 473         if (wglGetEntensionsStringARB)
 474         {
 475             const char * pWglExtString=wglGetEntensionsStringARB(hDC);
 476             if (pWglExtString)
 477             {
 478                 if (strstr(pWglExtString, "WGL_ARB_multisample"))
 479                 {
 480                     int pAttributes[100];
 481                     int iCounter=0;
 482                     int iPixelFormat;
 483                     BOOL bValid;
 484                     float fAttributes[] = {0,0};
 485                     UINT numFormats;
 486                     PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARBProc=NULL;
 487
 488                     wglChoosePixelFormatARBProc=(PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
 489                     if ( wglChoosePixelFormatARBProc )
 490                     {
 491                         pAttributes[iCounter++]=WGL_DRAW_TO_WINDOW_ARB;        pAttributes[iCounter++]=GL_TRUE;
 492                         pAttributes[iCounter++]=WGL_SUPPORT_OPENGL_ARB;        pAttributes[iCounter++]=GL_TRUE;
 493                         pAttributes[iCounter++]=WGL_ACCELERATION_ARB;        pAttributes[iCounter++]=WGL_FULL_ACCELERATION_ARB;
 494
 495                         pAttributes[iCounter++]=WGL_COLOR_BITS_ARB;            pAttributes[iCounter++]=pfd.cColorBits ;
 496                         pAttributes[iCounter++]=WGL_ALPHA_BITS_ARB;            pAttributes[iCounter++]=pfd.cAlphaBits;
 497                         pAttributes[iCounter++]=WGL_DEPTH_BITS_ARB;            pAttributes[iCounter++]=pfd.cDepthBits;
 498                         pAttributes[iCounter++]=WGL_STENCIL_BITS_ARB;        pAttributes[iCounter++]=pfd.cStencilBits;
 499
 500                         pAttributes[iCounter++]=WGL_DOUBLE_BUFFER_ARB;        pAttributes[iCounter++]=(fgState.DisplayMode & GLUT_DOUBLE)!=0;
 501                         pAttributes[iCounter++]=WGL_SAMPLE_BUFFERS_ARB;        pAttributes[iCounter++]=GL_TRUE;
 502                         pAttributes[iCounter++]=WGL_SAMPLES_ARB;            pAttributes[iCounter++]=4;
 503                         pAttributes[iCounter++]=0;                            pAttributes[iCounter++]=0;    /* terminator */
 504
 505                         bValid = wglChoosePixelFormatARBProc(window->Window.Device,pAttributes,fAttributes,1,&iPixelFormat,&numFormats);
 506
 507                         if (bValid && numFormats>0)
 508                             pixelformat=iPixelFormat;
 509                     }
 510                 }
 511                 wglMakeCurrent( hDC_before, rc_before);
 512                 wglDeleteContext(rc);
 513                 ReleaseDC(hWnd, hDC);
 514                 DestroyWindow(hWnd);
 515                 UnregisterClass(_T("FREEGLUT_dummy"), fgDisplay.Instance);
 516             }
 517         }
 518     }
 519
 520     if( pixelformat == 0 )
 521         return GL_FALSE;
 522
 523     if( checkOnly )
 524         return GL_TRUE;
 525     return SetPixelFormat( window->Window.Device, pixelformat, ppfd );
 526 #endif /* defined(_WIN32_WCE) */
 527 }
 528 #endif /* TARGET_HOST_MS_WINDOWS */
 529
 530 /*
 531  * Sets the OpenGL context and the fgStructure "Current Window" pointer to
 532  * the window structure passed in.
 533  */
 534 void fgSetWindow ( SFG_Window *window )
 535 {
 536 #if TARGET_HOST_POSIX_X11
 537     if ( window )
 538         glXMakeContextCurrent(
 539             fgDisplay.Display,
 540             window->Window.Handle,
 541             window->Window.Handle,
 542             window->Window.Context
 543         );
 544 #elif TARGET_HOST_MS_WINDOWS
 545     if( fgStructure.CurrentWindow )
 546         ReleaseDC( fgStructure.CurrentWindow->Window.Handle,
 547                    fgStructure.CurrentWindow->Window.Device );
 548
 549     if ( window )
 550     {
 551         window->Window.Device = GetDC( window->Window.Handle );
 552         wglMakeCurrent(
 553             window->Window.Device,
 554             window->Window.Context
 555         );
 556     }
 557 #endif
 558     fgStructure.CurrentWindow = window;
 559 }
 560
 561
 562
 563 #if TARGET_HOST_POSIX_X11
 564
 565 #ifndef GLX_CONTEXT_MAJOR_VERSION_ARB
 566 #define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
 567 #endif
 568
 569 #ifndef GLX_CONTEXT_MINOR_VERSION_ARB
 570 #define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
 571 #endif
 572
 573 #ifndef GLX_CONTEXT_FLAGS_ARB
 574 #define GLX_CONTEXT_FLAGS_ARB 0x2094
 575 #endif
 576
 577 #ifndef GLX_CONTEXT_DEBUG_BIT_ARB
 578 #define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
 579 #endif
 580
 581 #ifndef GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
 582 #define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
 583 #endif
 584
 585 typedef GLXContext (*CreateContextAttribsProc)(Display *dpy, GLXFBConfig config,
 586                                                GLXContext share_list, Bool direct,
 587                                                const int *attrib_list);
 588
 589 static GLXContext fghCreateNewContext( SFG_Window* window )
 590 {
 591   /* for color model calculation */
 592   int menu = ( window->IsMenu && !fgStructure.MenuContext );
 593   int index_mode = ( fgState.DisplayMode & GLUT_INDEX );
 594
 595   /* "classic" context creation */
 596   Display *dpy = fgDisplay.Display;
 597   GLXFBConfig config = *(window->Window.FBConfig);
 598   int render_type = ( !menu && index_mode ) ? GLX_COLOR_INDEX_TYPE : GLX_RGBA_TYPE;
 599   GLXContext share_list = NULL;
 600   Bool direct = ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT );
 601   GLXContext context;
 602
 603   /* new context creation */
 604   int attribs[7];
 605   CreateContextAttribsProc createContextAttribs;
 606
 607   /* If nothing fancy has been required, simply use the old context creation GLX API entry */
 608   if ( fgState.MajorVersion == 1 && fgState.MinorVersion == 0 && fgState.ContextFlags == 0)
 609   {
 610     context = glXCreateNewContext( dpy, config, render_type, share_list, direct );
 611     if ( context == NULL ) {
 612       fgError( "could not create new OpenGL context" );
 613     }
 614     return context;
 615   }
 616
 617   /* color index mode is not available anymore with OpenGL 3.0 */
 618   if ( render_type == GLX_COLOR_INDEX_TYPE ) {
 619     fgWarning( "color index mode is deprecated, using RGBA mode" );
 620   }
 621
 622   attribs[0] = GLX_CONTEXT_MAJOR_VERSION_ARB;
 623   attribs[1] = fgState.MajorVersion;
 624   attribs[2] = GLX_CONTEXT_MINOR_VERSION_ARB;
 625   attribs[3] = fgState.MinorVersion;
 626   attribs[4] = GLX_CONTEXT_FLAGS_ARB;
 627   attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? GLX_CONTEXT_DEBUG_BIT_ARB : 0) |
 628     ((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
 629   attribs[6] = 0;
 630
 631   createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress( "glXCreateContextAttribsARB" );
 632   if ( createContextAttribs == NULL ) {
 633     fgError( "glXCreateContextAttribsARB not found" );
 634   }
 635
 636   context = createContextAttribs( dpy, config, share_list, direct, attribs );
 637   if ( context == NULL ) {
 638     fgError( "could not create new OpenGL %d.%d context (flags %x)",
 639              fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
 640   }
 641   return context;
 642 }
 643 #endif
 644
 645
 646 /*
 647  * Opens a window. Requires a SFG_Window object created and attached
 648  * to the freeglut structure. OpenGL context is created here.
 649  */
 650 void fgOpenWindow( SFG_Window* window, const char* title,
 651                    GLboolean positionUse, int x, int y,
 652                    GLboolean sizeUse, int w, int h,
 653                    GLboolean gameMode, GLboolean isSubWindow )
 654 {
 655 #if TARGET_HOST_POSIX_X11
 656     XVisualInfo * visualInfo;
 657     XSetWindowAttributes winAttr;
 658     XTextProperty textProperty;
 659     XSizeHints sizeHints;
 660     XWMHints wmHints;
 661     unsigned long mask;
 662     unsigned int current_DisplayMode = fgState.DisplayMode ;
 663
 664     /* Save the display mode if we are creating a menu window */
 665     if( window->IsMenu && ( ! fgStructure.MenuContext ) )
 666         fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB ;
 667
 668     window->Window.FBConfig = fgChooseFBConfig( );
 669
 670     if( window->IsMenu && ( ! fgStructure.MenuContext ) )
 671         fgState.DisplayMode = current_DisplayMode ;
 672
 673     if( ! window->Window.FBConfig )
 674     {
 675         /*
 676          * The "fgChooseFBConfig" returned a null meaning that the visual
 677          * context is not available.
 678          * Try a couple of variations to see if they will work.
 679          */
 680         if( !( fgState.DisplayMode & GLUT_DOUBLE ) )
 681         {
 682             fgState.DisplayMode |= GLUT_DOUBLE ;
 683             window->Window.FBConfig = fgChooseFBConfig( );
 684             fgState.DisplayMode &= ~GLUT_DOUBLE;
 685         }
 686
 687         if( fgState.DisplayMode & GLUT_MULTISAMPLE )
 688         {
 689             fgState.DisplayMode &= ~GLUT_MULTISAMPLE ;
 690             window->Window.FBConfig = fgChooseFBConfig( );
 691             fgState.DisplayMode |= GLUT_MULTISAMPLE;
 692         }
 693     }
 694
 695     FREEGLUT_INTERNAL_ERROR_EXIT( window->Window.FBConfig != NULL,
 696                                   "FBConfig with necessary capabilities not found", "fgOpenWindow" );
 697
 698     /*  Get the X visual.  */
 699     visualInfo = glXGetVisualFromFBConfig( fgDisplay.Display,
 700                                            *(window->Window.FBConfig) );
 701
 702     /*
 703      * XXX HINT: the masks should be updated when adding/removing callbacks.
 704      * XXX       This might speed up message processing. Is that true?
 705      * XXX
 706      * XXX A: Not appreciably, but it WILL make it easier to debug.
 707      * XXX    Try tracing old GLUT and try tracing freeglut.  Old GLUT
 708      * XXX    turns off events that it doesn't need and is a whole lot
 709      * XXX    more pleasant to trace.  (Think mouse-motion!  Tons of
 710      * XXX    ``bonus'' GUI events stream in.)
 711      */
 712     winAttr.event_mask        =
 713         StructureNotifyMask | SubstructureNotifyMask | ExposureMask |
 714         ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
 715         VisibilityChangeMask | EnterWindowMask | LeaveWindowMask |
 716         PointerMotionMask | ButtonMotionMask;
 717     winAttr.background_pixmap = None;
 718     winAttr.background_pixel  = 0;
 719     winAttr.border_pixel      = 0;
 720
 721     winAttr.colormap = XCreateColormap(
 722         fgDisplay.Display, fgDisplay.RootWindow,
 723         visualInfo->visual, AllocNone
 724     );
 725
 726     mask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask;
 727
 728     if( window->IsMenu || ( gameMode == GL_TRUE ) )
 729     {
 730         winAttr.override_redirect = True;
 731         mask |= CWOverrideRedirect;
 732     }
 733
 734     if( ! positionUse )
 735         x = y = -1; /* default window position */
 736     if( ! sizeUse )
 737         w = h = 300; /* default window size */
 738
 739     window->Window.Handle = XCreateWindow(
 740         fgDisplay.Display,
 741         window->Parent == NULL ? fgDisplay.RootWindow :
 742         window->Parent->Window.Handle,
 743         x, y, w, h, 0,
 744         visualInfo->depth, InputOutput,
 745         visualInfo->visual, mask,
 746         &winAttr
 747     );
 748
 749     /*
 750      * The GLX context creation, possibly trying the direct context rendering
 751      *  or else use the current context if the user has so specified
 752      */
 753
 754     if( window->IsMenu )
 755     {
 756         /*
 757          * If there isn't already an OpenGL rendering context for menu
 758          * windows, make one
 759          */
 760         if( !fgStructure.MenuContext )
 761         {
 762             fgStructure.MenuContext =
 763                 (SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
 764             fgStructure.MenuContext->MContext = fghCreateNewContext( window );
 765         }
 766
 767         /* window->Window.Context = fgStructure.MenuContext->MContext; */
 768         window->Window.Context = fghCreateNewContext( window );
 769     }
 770     else if( fgState.UseCurrentContext )
 771     {
 772         window->Window.Context = glXGetCurrentContext( );
 773
 774         if( ! window->Window.Context )
 775             window->Window.Context = fghCreateNewContext( window );
 776     }
 777     else
 778         window->Window.Context = fghCreateNewContext( window );
 779
 780 #if !defined( __FreeBSD__ ) && !defined( __NetBSD__ )
 781     if(  !glXIsDirect( fgDisplay.Display, window->Window.Context ) )
 782     {
 783       if( fgState.DirectContext == GLUT_FORCE_DIRECT_CONTEXT )
 784         fgError( "Unable to force direct context rendering for window '%s'",
 785                  title );
 786     }
 787 #endif
 788
 789     /*
 790      * XXX Assume the new window is visible by default
 791      * XXX Is this a  safe assumption?
 792      */
 793     window->State.Visible = GL_TRUE;
 794
 795     sizeHints.flags = 0;
 796     if ( positionUse )
 797         sizeHints.flags |= USPosition;
 798     if ( sizeUse )
 799         sizeHints.flags |= USSize;
 800
 801     /*
 802      * Fill in the size hints values now (the x, y, width and height
 803      * settings are obsolete, are there any more WMs that support them?)
 804      * Unless the X servers actually stop supporting these, we should
 805      * continue to fill them in.  It is *not* our place to tell the user
 806      * that they should replace a window manager that they like, and which
 807      * works, just because *we* think that it's not "modern" enough.
 808      */
 809     sizeHints.x      = x;
 810     sizeHints.y      = y;
 811     sizeHints.width  = w;
 812     sizeHints.height = h;
 813
 814     wmHints.flags = StateHint;
 815     wmHints.initial_state = fgState.ForceIconic ? IconicState : NormalState;
 816     /* Prepare the window and iconified window names... */
 817     XStringListToTextProperty( (char **) &title, 1, &textProperty );
 818
 819     XSetWMProperties(
 820         fgDisplay.Display,
 821         window->Window.Handle,
 822         &textProperty,
 823         &textProperty,
 824         0,
 825         0,
 826         &sizeHints,
 827         &wmHints,
 828         NULL
 829     );
 830     XFree( textProperty.value );
 831
 832     XSetWMProtocols( fgDisplay.Display, window->Window.Handle,
 833                      &fgDisplay.DeleteWindow, 1 );
 834
 835     glXMakeContextCurrent(
 836         fgDisplay.Display,
 837         window->Window.Handle,
 838         window->Window.Handle,
 839         window->Window.Context
 840     );
 841
 842     XMapWindow( fgDisplay.Display, window->Window.Handle );
 843
 844     XFree(visualInfo);
 845
 846 #elif TARGET_HOST_MS_WINDOWS
 847
 848     WNDCLASS wc;
 849     DWORD flags;
 850     DWORD exFlags = 0;
 851     ATOM atom;
 852     int WindowStyle = 0;
 853
 854     /* Grab the window class we have registered on glutInit(): */
 855     atom = GetClassInfo( fgDisplay.Instance, _T("FREEGLUT"), &wc );
 856     FREEGLUT_INTERNAL_ERROR_EXIT ( atom, "Window Class Info Not Found",
 857                                    "fgOpenWindow" );
 858
 859     if( gameMode )
 860     {
 861         FREEGLUT_INTERNAL_ERROR_EXIT ( window->Parent == NULL,
 862                                        "Game mode being invoked on a subwindow",
 863                                        "fgOpenWindow" );
 864
 865         /*
 866          * Set the window creation flags appropriately to make the window
 867          * entirely visible:
 868          */
 869         flags = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
 870     }
 871     else
 872     {
 873         int worig = w, horig = h;
 874
 875 #if !defined(_WIN32_WCE)
 876         if ( ( ! isSubWindow ) && ( ! window->IsMenu ) )
 877         {
 878             /*
 879              * Update the window dimensions, taking account of window
 880              * decorations.  "freeglut" is to create the window with the
 881              * outside of its border at (x,y) and with dimensions (w,h).
 882              */
 883             w += (GetSystemMetrics( SM_CXSIZEFRAME ) )*2;
 884             h += (GetSystemMetrics( SM_CYSIZEFRAME ) )*2 +
 885                 GetSystemMetrics( SM_CYCAPTION );
 886         }
 887 #endif /* defined(_WIN32_WCE) */
 888
 889         if( ! positionUse )
 890         {
 891             x = CW_USEDEFAULT;
 892             y = CW_USEDEFAULT;
 893         }
 894         /* setting State.Width/Height to call resize callback later */
 895         if( ! sizeUse )
 896         {
 897             if( ! window->IsMenu )
 898             {
 899                 w = CW_USEDEFAULT;
 900                 h = CW_USEDEFAULT;
 901             }
 902             else /* fail safe - Windows can make a window of size (0, 0) */
 903                 w = h = 300; /* default window size */
 904             window->State.Width = window->State.Height = -1;
 905         }
 906         else
 907         {
 908             window->State.Width = worig;
 909             window->State.Height = horig;
 910         }
 911
 912         /*
 913          * There's a small difference between creating the top, child and
 914          * game mode windows
 915          */
 916         flags = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
 917
 918         if ( window->IsMenu )
 919         {
 920             flags |= WS_POPUP;
 921             exFlags |= WS_EX_TOOLWINDOW;
 922         }
 923 #if !defined(_WIN32_WCE)
 924         else if( window->Parent == NULL )
 925             flags |= WS_OVERLAPPEDWINDOW;
 926 #endif
 927         else
 928             flags |= WS_CHILD;
 929     }
 930
 931 #if defined(_WIN32_WCE)
 932     {
 933         wchar_t* wstr = fghWstrFromStr(title);
 934
 935         window->Window.Handle = CreateWindow(
 936             _T("FREEGLUT"),
 937             wstr,
 938             WS_VISIBLE | WS_POPUP,
 939             0,0, 240,320,
 940             NULL,
 941             NULL,
 942             fgDisplay.Instance,
 943             (LPVOID) window
 944         );
 945
 946         free(wstr);
 947
 948         SHFullScreen(window->Window.Handle, SHFS_HIDESTARTICON);
 949         SHFullScreen(window->Window.Handle, SHFS_HIDESIPBUTTON);
 950         SHFullScreen(window->Window.Handle, SHFS_HIDETASKBAR);
 951         MoveWindow(window->Window.Handle, 0, 0, 240, 320, TRUE);
 952         ShowWindow(window->Window.Handle, SW_SHOW);
 953         UpdateWindow(window->Window.Handle);
 954     }
 955 #else
 956     window->Window.Handle = CreateWindowEx(
 957         exFlags,
 958         _T("FREEGLUT"),
 959         title,
 960         flags,
 961         x, y, w, h,
 962         (HWND) window->Parent == NULL ? NULL : window->Parent->Window.Handle,
 963         (HMENU) NULL,
 964         fgDisplay.Instance,
 965         (LPVOID) window
 966     );
 967 #endif /* defined(_WIN32_WCE) */
 968
 969     if( !( window->Window.Handle ) )
 970         fgError( "Failed to create a window (%s)!", title );
 971
 972     /* Make a menu window always on top - fix Feature Request 947118 */
 973     if( window->IsMenu || gameMode )
 974         SetWindowPos(
 975                         window->Window.Handle,
 976                         HWND_TOPMOST,
 977                         0, 0, 0, 0,
 978                         SWP_NOMOVE | SWP_NOSIZE
 979                     );
 980
 981     /* Hack to remove the caption (title bar) and/or border
 982      * and all the system menu controls.
 983      */
 984     WindowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
 985     if ( fgState.DisplayMode & GLUT_CAPTIONLESS )
 986     {
 987         SetWindowLong ( window->Window.Handle, GWL_STYLE,
 988                         WindowStyle & ~(WS_DLGFRAME | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX));
 989     }
 990     else if ( fgState.DisplayMode & GLUT_BORDERLESS )
 991     {
 992         SetWindowLong ( window->Window.Handle, GWL_STYLE,
 993                         WindowStyle & ~(WS_BORDER | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX));
 994     }
 995 /*  SetWindowPos(window->Window.Handle, NULL, 0, 0, 0, 0,
 996      SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED); */
 997
 998
 999 #if defined(_WIN32_WCE)
1000     ShowWindow( window->Window.Handle, SW_SHOW );
1001 #else
1002     ShowWindow( window->Window.Handle,
1003                 fgState.ForceIconic ? SW_SHOWMINIMIZED : SW_SHOW );
1004 #endif /* defined(_WIN32_WCE) */
1005
1006     UpdateWindow( window->Window.Handle );
1007     ShowCursor( TRUE );  /* XXX Old comments say "hide cursor"! */
1008
1009 #endif
1010
1011     fgSetWindow( window );
1012
1013     window->Window.DoubleBuffered =
1014         ( fgState.DisplayMode & GLUT_DOUBLE ) ? 1 : 0;
1015
1016     if ( ! window->Window.DoubleBuffered )
1017     {
1018         glDrawBuffer ( GL_FRONT );
1019         glReadBuffer ( GL_FRONT );
1020     }
1021 }
1022
1023 /*
1024  * Closes a window, destroying the frame and OpenGL context
1025  */
1026 void fgCloseWindow( SFG_Window* window )
1027 {
1028 #if TARGET_HOST_POSIX_X11
1029
1030     glXDestroyContext( fgDisplay.Display, window->Window.Context );
1031     XFree( window->Window.FBConfig );
1032     XDestroyWindow( fgDisplay.Display, window->Window.Handle );
1033     /* XFlush( fgDisplay.Display ); */ /* XXX Shouldn't need this */
1034
1035 #elif TARGET_HOST_MS_WINDOWS
1036
1037     /* Make sure we don't close a window with current context active */
1038     if( fgStructure.CurrentWindow == window )
1039         wglMakeCurrent( NULL, NULL );
1040
1041     /*
1042      * Step through the list of windows.  If the rendering context
1043      * is not being used by another window, then we delete it.
1044      */
1045     {
1046         int used = FALSE ;
1047         SFG_Window *iter ;
1048
1049         for( iter = (SFG_Window *)fgStructure.Windows.First;
1050              iter;
1051              iter = (SFG_Window *)iter->Node.Next )
1052         {
1053             if( ( iter->Window.Context == window->Window.Context ) &&
1054                 ( iter != window ) )
1055                 used = TRUE;
1056         }
1057
1058         if( ! used )
1059             wglDeleteContext( window->Window.Context );
1060     }
1061
1062     DestroyWindow( window->Window.Handle );
1063 #endif
1064 }
1065
1066
1067 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
1068
1069 /*
1070  * Creates a new top-level freeglut window
1071  */
1072 int FGAPIENTRY glutCreateWindow( const char* title )
1073 {
1074     /* XXX GLUT does not exit; it simply calls "glutInit" quietly if the
1075      * XXX application has not already done so.  The "freeglut" community
1076      * XXX decided not to go this route (freeglut-developer e-mail from
1077      * XXX Steve Baker, 12/16/04, 4:22 PM CST, "Re: [Freeglut-developer]
1078      * XXX Desired 'freeglut' behaviour when there is no current window"
1079      */
1080     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateWindow" );
1081
1082     return fgCreateWindow( NULL, title, fgState.Position.Use,
1083                            fgState.Position.X, fgState.Position.Y,
1084                            fgState.Size.Use, fgState.Size.X, fgState.Size.Y,
1085                            GL_FALSE, GL_FALSE )->ID;
1086 }
1087
1088 /*
1089  * This function creates a sub window.
1090  */
1091 int FGAPIENTRY glutCreateSubWindow( int parentID, int x, int y, int w, int h )
1092 {
1093     int ret = 0;
1094     SFG_Window* window = NULL;
1095     SFG_Window* parent = NULL;
1096
1097     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateSubWindow" );
1098     parent = fgWindowByID( parentID );
1099     freeglut_return_val_if_fail( parent != NULL, 0 );
1100     if ( x < 0 )
1101     {
1102         x = parent->State.Width + x ;
1103         if ( w >= 0 ) x -= w ;
1104     }
1105
1106     if ( w < 0 ) w = parent->State.Width - x + w ;
1107     if ( w < 0 )
1108     {
1109         x += w ;
1110         w = -w ;
1111     }
1112
1113     if ( y < 0 )
1114     {
1115         y = parent->State.Height + y ;
1116         if ( h >= 0 ) y -= h ;
1117     }
1118
1119     if ( h < 0 ) h = parent->State.Height - y + h ;
1120     if ( h < 0 )
1121     {
1122         y += h ;
1123         h = -h ;
1124     }
1125
1126     window = fgCreateWindow( parent, "", GL_TRUE, x, y, GL_TRUE, w, h, GL_FALSE, GL_FALSE );
1127     ret = window->ID;
1128
1129     return ret;
1130 }
1131
1132 /*
1133  * Destroys a window and all of its subwindows
1134  */
1135 void FGAPIENTRY glutDestroyWindow( int windowID )
1136 {
1137     SFG_Window* window;
1138     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDestroyWindow" );
1139     window = fgWindowByID( windowID );
1140     freeglut_return_if_fail( window != NULL );
1141     {
1142         fgExecutionState ExecState = fgState.ExecState;
1143         fgAddToWindowDestroyList( window );
1144         fgState.ExecState = ExecState;
1145     }
1146 }
1147
1148 /*
1149  * This function selects the current window
1150  */
1151 void FGAPIENTRY glutSetWindow( int ID )
1152 {
1153     SFG_Window* window = NULL;
1154
1155     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindow" );
1156     if( fgStructure.CurrentWindow != NULL )
1157         if( fgStructure.CurrentWindow->ID == ID )
1158             return;
1159
1160     window = fgWindowByID( ID );
1161     if( window == NULL )
1162     {
1163         fgWarning( "glutSetWindow(): window ID %d not found!", ID );
1164         return;
1165     }
1166
1167     fgSetWindow( window );
1168 }
1169
1170 /*
1171  * This function returns the ID number of the current window, 0 if none exists
1172  */
1173 int FGAPIENTRY glutGetWindow( void )
1174 {
1175     SFG_Window *win = fgStructure.CurrentWindow;
1176     /*
1177      * Since GLUT did not throw an error if this function was called without a prior call to
1178      * "glutInit", this function shouldn't do so here.  Instead let us return a zero.
1179      * See Feature Request "[ 1307049 ] glutInit check".
1180      */
1181     if ( ! fgState.Initialised )
1182         return 0;
1183
1184     while ( win && win->IsMenu )
1185         win = win->Parent;
1186     return win ? win->ID : 0;
1187 }
1188
1189 /*
1190  * This function makes the current window visible
1191  */
1192 void FGAPIENTRY glutShowWindow( void )
1193 {
1194     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutShowWindow" );
1195     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutShowWindow" );
1196
1197 #if TARGET_HOST_POSIX_X11
1198
1199     XMapWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1200     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1201
1202 #elif TARGET_HOST_MS_WINDOWS
1203
1204     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_SHOW );
1205
1206 #endif
1207
1208     fgStructure.CurrentWindow->State.Redisplay = GL_TRUE;
1209 }
1210
1211 /*
1212  * This function hides the current window
1213  */
1214 void FGAPIENTRY glutHideWindow( void )
1215 {
1216     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutHideWindow" );
1217     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutHideWindow" );
1218
1219 #if TARGET_HOST_POSIX_X11
1220
1221     if( fgStructure.CurrentWindow->Parent == NULL )
1222         XWithdrawWindow( fgDisplay.Display,
1223                          fgStructure.CurrentWindow->Window.Handle,
1224                          fgDisplay.Screen );
1225     else
1226         XUnmapWindow( fgDisplay.Display,
1227                       fgStructure.CurrentWindow->Window.Handle );
1228     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1229
1230 #elif TARGET_HOST_MS_WINDOWS
1231
1232     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_HIDE );
1233
1234 #endif
1235
1236     fgStructure.CurrentWindow->State.Redisplay = GL_FALSE;
1237 }
1238
1239 /*
1240  * Iconify the current window (top-level windows only)
1241  */
1242 void FGAPIENTRY glutIconifyWindow( void )
1243 {
1244     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutIconifyWindow" );
1245     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutIconifyWindow" );
1246
1247     fgStructure.CurrentWindow->State.Visible   = GL_FALSE;
1248 #if TARGET_HOST_POSIX_X11
1249
1250     XIconifyWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
1251                     fgDisplay.Screen );
1252     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1253
1254 #elif TARGET_HOST_MS_WINDOWS
1255
1256     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_MINIMIZE );
1257
1258 #endif
1259
1260     fgStructure.CurrentWindow->State.Redisplay = GL_FALSE;
1261 }
1262
1263 /*
1264  * Set the current window's title
1265  */
1266 void FGAPIENTRY glutSetWindowTitle( const char* title )
1267 {
1268     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowTitle" );
1269     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowTitle" );
1270     if( ! fgStructure.CurrentWindow->Parent )
1271     {
1272 #if TARGET_HOST_POSIX_X11
1273
1274         XTextProperty text;
1275
1276         text.value = (unsigned char *) title;
1277         text.encoding = XA_STRING;
1278         text.format = 8;
1279         text.nitems = strlen( title );
1280
1281         XSetWMName(
1282             fgDisplay.Display,
1283             fgStructure.CurrentWindow->Window.Handle,
1284             &text
1285         );
1286
1287         XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1288
1289 #elif TARGET_HOST_MS_WINDOWS
1290 #    ifdef _WIN32_WCE
1291         {
1292             wchar_t* wstr = fghWstrFromStr(title);
1293             SetWindowText( fgStructure.CurrentWindow->Window.Handle, wstr );
1294             free(wstr);
1295         }
1296 #    else
1297         SetWindowText( fgStructure.CurrentWindow->Window.Handle, title );
1298 #    endif
1299
1300 #endif
1301     }
1302 }
1303
1304 /*
1305  * Set the current window's iconified title
1306  */
1307 void FGAPIENTRY glutSetIconTitle( const char* title )
1308 {
1309     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetIconTitle" );
1310     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetIconTitle" );
1311
1312     if( ! fgStructure.CurrentWindow->Parent )
1313     {
1314 #if TARGET_HOST_POSIX_X11
1315
1316         XTextProperty text;
1317
1318         text.value = (unsigned char *) title;
1319         text.encoding = XA_STRING;
1320         text.format = 8;
1321         text.nitems = strlen( title );
1322
1323         XSetWMIconName(
1324             fgDisplay.Display,
1325             fgStructure.CurrentWindow->Window.Handle,
1326             &text
1327         );
1328
1329         XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1330
1331 #elif TARGET_HOST_MS_WINDOWS
1332 #    ifdef _WIN32_WCE
1333         {
1334             wchar_t* wstr = fghWstrFromStr(title);
1335             SetWindowText( fgStructure.CurrentWindow->Window.Handle, wstr );
1336             free(wstr);
1337         }
1338 #    else
1339         SetWindowText( fgStructure.CurrentWindow->Window.Handle, title );
1340 #    endif
1341
1342 #endif
1343     }
1344 }
1345
1346 /*
1347  * Change the current window's size
1348  */
1349 void FGAPIENTRY glutReshapeWindow( int width, int height )
1350 {
1351     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeWindow" );
1352     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutReshapeWindow" );
1353
1354     if (glutGet(GLUT_FULL_SCREEN))
1355     {
1356       /*  Leave full screen state before resizing. */
1357       glutFullScreenToggle();
1358     }
1359
1360     fgStructure.CurrentWindow->State.NeedToResize = GL_TRUE;
1361     fgStructure.CurrentWindow->State.Width  = width ;
1362     fgStructure.CurrentWindow->State.Height = height;
1363 }
1364
1365 /*
1366  * Change the current window's position
1367  */
1368 void FGAPIENTRY glutPositionWindow( int x, int y )
1369 {
1370     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPositionWindow" );
1371     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPositionWindow" );
1372
1373     if (glutGet(GLUT_FULL_SCREEN))
1374     {
1375       /*  Leave full screen state before moving. */
1376       glutFullScreenToggle();
1377     }
1378
1379 #if TARGET_HOST_POSIX_X11
1380
1381     XMoveWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
1382                  x, y );
1383     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1384
1385 #elif TARGET_HOST_MS_WINDOWS
1386
1387     {
1388         RECT winRect;
1389
1390         /* "GetWindowRect" returns the pixel coordinates of the outside of the window */
1391         GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
1392         MoveWindow(
1393             fgStructure.CurrentWindow->Window.Handle,
1394             x,
1395             y,
1396             winRect.right - winRect.left,
1397             winRect.bottom - winRect.top,
1398             TRUE
1399         );
1400     }
1401
1402 #endif
1403 }
1404
1405 /*
1406  * Lowers the current window (by Z order change)
1407  */
1408 void FGAPIENTRY glutPushWindow( void )
1409 {
1410     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPushWindow" );
1411     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPushWindow" );
1412
1413 #if TARGET_HOST_POSIX_X11
1414
1415     XLowerWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1416
1417 #elif TARGET_HOST_MS_WINDOWS
1418
1419     SetWindowPos(
1420         fgStructure.CurrentWindow->Window.Handle,
1421         HWND_BOTTOM,
1422         0, 0, 0, 0,
1423         SWP_NOSIZE | SWP_NOMOVE
1424     );
1425
1426 #endif
1427 }
1428
1429 /*
1430  * Raises the current window (by Z order change)
1431  */
1432 void FGAPIENTRY glutPopWindow( void )
1433 {
1434     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPopWindow" );
1435     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPopWindow" );
1436
1437 #if TARGET_HOST_POSIX_X11
1438
1439     XRaiseWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1440
1441 #elif TARGET_HOST_MS_WINDOWS
1442
1443     SetWindowPos(
1444         fgStructure.CurrentWindow->Window.Handle,
1445         HWND_TOP,
1446         0, 0, 0, 0,
1447         SWP_NOSIZE | SWP_NOMOVE
1448     );
1449
1450 #endif
1451 }
1452
1453 /*
1454  * Resize the current window so that it fits the whole screen
1455  */
1456 void FGAPIENTRY glutFullScreen( void )
1457 {
1458     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreen" );
1459     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreen" );
1460
1461     if (glutGet(GLUT_FULL_SCREEN))
1462     {
1463       /*  Leave full screen state before resizing. */
1464       glutFullScreenToggle();
1465     }
1466
1467     {
1468 #if TARGET_HOST_POSIX_X11
1469
1470         Status status;  /* Returned by XGetWindowAttributes(), not checked. */
1471         XWindowAttributes attributes;
1472
1473         status = XGetWindowAttributes(fgDisplay.Display,
1474                                       fgStructure.CurrentWindow->Window.Handle,
1475                                       &attributes);
1476         /*
1477          * The "x" and "y" members of "attributes" are the window's coordinates
1478          * relative to its parent, i.e. to the decoration window.
1479          */
1480         XMoveResizeWindow(fgDisplay.Display,
1481                           fgStructure.CurrentWindow->Window.Handle,
1482                           -attributes.x,
1483                           -attributes.y,
1484                           fgDisplay.ScreenWidth,
1485                           fgDisplay.ScreenHeight);
1486
1487 #elif TARGET_HOST_MS_WINDOWS && !defined(_WIN32_WCE) /* FIXME: what about WinCE */
1488         RECT rect;
1489
1490         /* For fullscreen mode, force the top-left corner to 0,0
1491          * and adjust the window rectangle so that the client area
1492          * covers the whole screen.
1493          */
1494
1495         rect.left   = 0;
1496         rect.top    = 0;
1497         rect.right  = fgDisplay.ScreenWidth;
1498         rect.bottom = fgDisplay.ScreenHeight;
1499
1500         AdjustWindowRect ( &rect, WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS |
1501                                   WS_CLIPCHILDREN, FALSE );
1502
1503         /*
1504          * SWP_NOACTIVATE     Do not activate the window
1505          * SWP_NOOWNERZORDER  Do not change position in z-order
1506          * SWP_NOSENDCHANGING Supress WM_WINDOWPOSCHANGING message
1507          * SWP_NOZORDER       Retains the current Z order (ignore 2nd param)
1508          */
1509
1510         SetWindowPos( fgStructure.CurrentWindow->Window.Handle,
1511                       HWND_TOP,
1512                       rect.left,
1513                       rect.top,
1514                       rect.right  - rect.left,
1515                       rect.bottom - rect.top,
1516                       SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING |
1517                       SWP_NOZORDER
1518                     );
1519 #endif
1520     }
1521 }
1522
1523 /*
1524  * Toggle the window's full screen state.
1525  */
1526 void FGAPIENTRY glutFullScreenToggle( void )
1527 {
1528     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreenToggle" );
1529     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreenToggle" );
1530
1531     {
1532 #if TARGET_HOST_POSIX_X11
1533
1534       if (fgDisplay.StateFullScreen != None)
1535       {
1536         XEvent xevent;
1537         long event_mask;
1538         int status;
1539
1540         xevent.type = ClientMessage;
1541         xevent.xclient.type = ClientMessage;
1542         xevent.xclient.serial = 0;
1543         xevent.xclient.send_event = True;
1544         xevent.xclient.display = fgDisplay.Display;
1545         xevent.xclient.window = fgStructure.CurrentWindow->Window.Handle;
1546         xevent.xclient.message_type = fgDisplay.State;
1547         xevent.xclient.format = 32;
1548         xevent.xclient.data.l[0] = 2;  /* _NET_WM_STATE_TOGGLE */
1549         xevent.xclient.data.l[1] = fgDisplay.StateFullScreen;
1550         xevent.xclient.data.l[2] = 0;
1551         xevent.xclient.data.l[3] = 0;
1552         xevent.xclient.data.l[4] = 0;
1553
1554         /*** Don't really understand how event masks work... ***/
1555         event_mask = SubstructureRedirectMask | SubstructureNotifyMask;
1556
1557         status = XSendEvent(fgDisplay.Display,
1558           fgDisplay.RootWindow,
1559           False,
1560           event_mask,
1561           &xevent);
1562         FREEGLUT_INTERNAL_ERROR_EXIT(status != 0,
1563           "XSendEvent failed",
1564           "glutFullScreenToggle");
1565       }
1566       else
1567 #endif
1568       {
1569         /*
1570          * If the window manager is not Net WM compliant, fall back to legacy
1571          * behaviour.
1572          */
1573         glutFullScreen();
1574       }
1575     }
1576 }
1577
1578 /*
1579  * A.Donev: Set and retrieve the window's user data
1580  */
1581 void* FGAPIENTRY glutGetWindowData( void )
1582 {
1583     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetWindowData" );
1584     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutGetWindowData" );
1585     return fgStructure.CurrentWindow->UserData;
1586 }
1587
1588 void FGAPIENTRY glutSetWindowData(void* data)
1589 {
1590     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowData" );
1591     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowData" );
1592     fgStructure.CurrentWindow->UserData = data;
1593 }
1594
1595 /*** END OF FILE ***/