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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 void fgNewWGLCreateContext( SFG_Window* window )
 304 {
 305     PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB;
 306     HGLRC context;
 307     int attribs[7];
 308     PFNWGLCREATECONTEXTATTRIBSARBPROC wglCreateContextAttribsARB;
 309     const char * pWglExtString;
 310
 311     /* If nothing fancy has been required, leave the context as it is */
 312     if ( fgState.MajorVersion == 1 && fgState.MinorVersion == 0 && fgState.ContextFlags == 0 )
 313     {
 314         return;
 315     }
 316
 317     wglMakeCurrent( window->Window.Device,
 318                     window->Window.Context );
 319
 320     wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
 321     if ( wglGetEntensionsStringARB == NULL )
 322     {
 323         return;
 324     }
 325
 326     pWglExtString=wglGetEntensionsStringARB(window->Window.Device);
 327     if (( pWglExtString == NULL ) || ( strstr(pWglExtString, "WGL_ARB_create_context") == NULL ))
 328     {
 329         return;
 330     }
 331
 332     /* new context creation */
 333     attribs[0] = WGL_CONTEXT_MAJOR_VERSION_ARB;
 334     attribs[1] = fgState.MajorVersion;
 335     attribs[2] = WGL_CONTEXT_MINOR_VERSION_ARB;
 336     attribs[3] = fgState.MinorVersion;
 337     attribs[4] = WGL_CONTEXT_FLAGS_ARB;
 338     attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? WGL_CONTEXT_DEBUG_BIT_ARB : 0) |
 339         ((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
 340     attribs[6] = 0;
 341
 342     wglCreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC) wglGetProcAddress( "wglCreateContextAttribsARB" );
 343     if ( wglCreateContextAttribsARB == NULL )
 344     {
 345         fgError( "wglCreateContextAttribsARB not found" );
 346     }
 347
 348     context = wglCreateContextAttribsARB( window->Window.Device, 0, attribs );
 349     if ( context == NULL )
 350     {
 351         fgError( "Unable to create OpenGL %d.%d context (flags %x)",
 352             fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
 353     }
 354
 355     wglMakeCurrent( NULL, NULL );
 356     wglDeleteContext( window->Window.Context );
 357     window->Window.Context = context;
 358 }
 359
 360
 361 GLboolean fgSetupPixelFormat( SFG_Window* window, GLboolean checkOnly,
 362                               unsigned char layer_type )
 363 {
 364 #if defined(_WIN32_WCE)
 365     return GL_TRUE;
 366 #else
 367     PIXELFORMATDESCRIPTOR* ppfd, pfd;
 368     int flags, pixelformat;
 369
 370     freeglut_return_val_if_fail( window != NULL, 0 );
 371     flags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
 372     if( fgState.DisplayMode & GLUT_DOUBLE )
 373         flags |= PFD_DOUBLEBUFFER;
 374
 375     if( fgState.DisplayMode & GLUT_STEREO )
 376         flags |= PFD_STEREO;
 377
 378 #if defined(_MSC_VER)
 379 #pragma message( "fgSetupPixelFormat(): there is still some work to do here!" )
 380 #endif
 381
 382     /* Specify which pixel format do we opt for... */
 383     pfd.nSize           = sizeof(PIXELFORMATDESCRIPTOR);
 384     pfd.nVersion        = 1;
 385     pfd.dwFlags         = flags;
 386
 387     if( fgState.DisplayMode & GLUT_INDEX )
 388     {
 389         pfd.iPixelType = PFD_TYPE_COLORINDEX;
 390         pfd.cRedBits                = 0;
 391         pfd.cGreenBits            = 0;
 392         pfd.cBlueBits             = 0;
 393         pfd.cAlphaBits            = 0;
 394     }
 395     else
 396     {
 397         pfd.iPixelType      = PFD_TYPE_RGBA;
 398         pfd.cRedBits                = 8;
 399         pfd.cGreenBits            = 8;
 400         pfd.cBlueBits             = 8;
 401         if ( fgState.DisplayMode & GLUT_ALPHA )
 402             pfd.cAlphaBits            = 8;
 403         else
 404             pfd.cAlphaBits            = 0;
 405     }
 406
 407     pfd.cColorBits      = 24;
 408     pfd.cRedShift       = 0;
 409     pfd.cGreenShift     = 0;
 410     pfd.cBlueShift      = 0;
 411     pfd.cAlphaShift     = 0;
 412     pfd.cAccumBits      = 0;
 413     pfd.cAccumRedBits   = 0;
 414     pfd.cAccumGreenBits = 0;
 415     pfd.cAccumBlueBits  = 0;
 416     pfd.cAccumAlphaBits = 0;
 417 #if 0
 418     pfd.cDepthBits      = 32;
 419     pfd.cStencilBits    = 0;
 420 #else
 421     pfd.cDepthBits      = 24;
 422     pfd.cStencilBits    = 8;
 423 #endif
 424     if( fgState.DisplayMode & GLUT_AUX4 )
 425         pfd.cAuxBuffers = 4;
 426     else if( fgState.DisplayMode & GLUT_AUX3 )
 427         pfd.cAuxBuffers = 3;
 428     else if( fgState.DisplayMode & GLUT_AUX2 )
 429         pfd.cAuxBuffers = 2;
 430     else if( fgState.DisplayMode & GLUT_AUX1 )
 431         pfd.cAuxBuffers = 1;
 432     else
 433         pfd.cAuxBuffers = 0;
 434
 435     pfd.iLayerType      = layer_type;
 436     pfd.bReserved       = 0;
 437     pfd.dwLayerMask     = 0;
 438     pfd.dwVisibleMask   = 0;
 439     pfd.dwDamageMask    = 0;
 440
 441     pfd.cColorBits = (BYTE) GetDeviceCaps( window->Window.Device, BITSPIXEL );
 442     ppfd = &pfd;
 443
 444     pixelformat = ChoosePixelFormat( window->Window.Device, ppfd );
 445
 446     /* windows hack for multismapling */
 447     if (fgState.DisplayMode&GLUT_MULTISAMPLE)
 448     {
 449         PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetEntensionsStringARB=NULL;
 450         HGLRC rc, rc_before=wglGetCurrentContext();
 451         HWND hWnd;
 452         HDC hDC, hDC_before=wglGetCurrentDC();
 453         WNDCLASS wndCls;
 454
 455         /* create a dummy window */
 456         ZeroMemory(&wndCls, sizeof(wndCls));
 457         wndCls.lpfnWndProc = DefWindowProc;
 458         wndCls.hInstance = fgDisplay.Instance;
 459         wndCls.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
 460         wndCls.lpszClassName = _T("FREEGLUT_dummy");
 461         RegisterClass( &wndCls );
 462
 463         hWnd=CreateWindow(_T("FREEGLUT_dummy"), _T(""), WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW , 0,0,0,0, 0, 0, fgDisplay.Instance, 0 );
 464         hDC=GetDC(hWnd);
 465         SetPixelFormat( hDC, pixelformat, ppfd );
 466
 467         rc = wglCreateContext( hDC );
 468         wglMakeCurrent(hDC, rc);
 469
 470         wglGetEntensionsStringARB=(PFNWGLGETEXTENSIONSSTRINGARBPROC)wglGetProcAddress("wglGetExtensionsStringARB");
 471         if (wglGetEntensionsStringARB)
 472         {
 473             const char * pWglExtString=wglGetEntensionsStringARB(hDC);
 474             if (pWglExtString)
 475             {
 476                 if (strstr(pWglExtString, "WGL_ARB_multisample"))
 477                 {
 478                     int pAttributes[100];
 479                     int iCounter=0;
 480                     int iPixelFormat;
 481                     BOOL bValid;
 482                     float fAttributes[] = {0,0};
 483                     UINT numFormats;
 484                     PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARBProc=NULL;
 485
 486                     wglChoosePixelFormatARBProc=(PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
 487                     if ( wglChoosePixelFormatARBProc )
 488                     {
 489                         pAttributes[iCounter++]=WGL_DRAW_TO_WINDOW_ARB;        pAttributes[iCounter++]=GL_TRUE;
 490                         pAttributes[iCounter++]=WGL_SUPPORT_OPENGL_ARB;        pAttributes[iCounter++]=GL_TRUE;
 491                         pAttributes[iCounter++]=WGL_ACCELERATION_ARB;        pAttributes[iCounter++]=WGL_FULL_ACCELERATION_ARB;
 492
 493                         pAttributes[iCounter++]=WGL_COLOR_BITS_ARB;            pAttributes[iCounter++]=pfd.cColorBits ;
 494                         pAttributes[iCounter++]=WGL_ALPHA_BITS_ARB;            pAttributes[iCounter++]=pfd.cAlphaBits;
 495                         pAttributes[iCounter++]=WGL_DEPTH_BITS_ARB;            pAttributes[iCounter++]=pfd.cDepthBits;
 496                         pAttributes[iCounter++]=WGL_STENCIL_BITS_ARB;        pAttributes[iCounter++]=pfd.cStencilBits;
 497
 498                         pAttributes[iCounter++]=WGL_DOUBLE_BUFFER_ARB;        pAttributes[iCounter++]=(fgState.DisplayMode & GLUT_DOUBLE)!=0;
 499                         pAttributes[iCounter++]=WGL_SAMPLE_BUFFERS_ARB;        pAttributes[iCounter++]=GL_TRUE;
 500                         pAttributes[iCounter++]=WGL_SAMPLES_ARB;            pAttributes[iCounter++]=4;
 501                         pAttributes[iCounter++]=0;                            pAttributes[iCounter++]=0;    /* terminator */
 502
 503                         bValid = wglChoosePixelFormatARBProc(window->Window.Device,pAttributes,fAttributes,1,&iPixelFormat,&numFormats);
 504
 505                         if (bValid && numFormats>0)
 506                             pixelformat=iPixelFormat;
 507                     }
 508                 }
 509                 wglMakeCurrent( hDC_before, rc_before);
 510                 wglDeleteContext(rc);
 511                 ReleaseDC(hWnd, hDC);
 512                 DestroyWindow(hWnd);
 513                 UnregisterClass(_T("FREEGLUT_dummy"), fgDisplay.Instance);
 514             }
 515         }
 516     }
 517
 518     if( pixelformat == 0 )
 519         return GL_FALSE;
 520
 521     if( checkOnly )
 522         return GL_TRUE;
 523     return SetPixelFormat( window->Window.Device, pixelformat, ppfd );
 524 #endif /* defined(_WIN32_WCE) */
 525 }
 526 #endif /* TARGET_HOST_MS_WINDOWS */
 527
 528 /*
 529  * Sets the OpenGL context and the fgStructure "Current Window" pointer to
 530  * the window structure passed in.
 531  */
 532 void fgSetWindow ( SFG_Window *window )
 533 {
 534 #if TARGET_HOST_POSIX_X11
 535     if ( window )
 536         glXMakeContextCurrent(
 537             fgDisplay.Display,
 538             window->Window.Handle,
 539             window->Window.Handle,
 540             window->Window.Context
 541         );
 542 #elif TARGET_HOST_MS_WINDOWS
 543     if( fgStructure.CurrentWindow )
 544         ReleaseDC( fgStructure.CurrentWindow->Window.Handle,
 545                    fgStructure.CurrentWindow->Window.Device );
 546
 547     if ( window )
 548     {
 549         window->Window.Device = GetDC( window->Window.Handle );
 550         wglMakeCurrent(
 551             window->Window.Device,
 552             window->Window.Context
 553         );
 554     }
 555 #endif
 556     fgStructure.CurrentWindow = window;
 557 }
 558
 559
 560
 561 #if TARGET_HOST_POSIX_X11
 562
 563 #ifndef GLX_CONTEXT_MAJOR_VERSION_ARB
 564 #define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
 565 #endif
 566
 567 #ifndef GLX_CONTEXT_MINOR_VERSION_ARB
 568 #define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
 569 #endif
 570
 571 #ifndef GLX_CONTEXT_FLAGS_ARB
 572 #define GLX_CONTEXT_FLAGS_ARB 0x2094
 573 #endif
 574
 575 #ifndef GLX_CONTEXT_DEBUG_BIT_ARB
 576 #define GLX_CONTEXT_DEBUG_BIT_ARB 0x0001
 577 #endif
 578
 579 #ifndef GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB
 580 #define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x0002
 581 #endif
 582
 583 typedef GLXContext (*CreateContextAttribsProc)(Display *dpy, GLXFBConfig config,
 584                                                GLXContext share_list, Bool direct,
 585                                                const int *attrib_list);
 586
 587 static GLXContext fghCreateNewContext( SFG_Window* window )
 588 {
 589   /* for color model calculation */
 590   int menu = ( window->IsMenu && !fgStructure.MenuContext );
 591   int index_mode = ( fgState.DisplayMode & GLUT_INDEX );
 592
 593   /* "classic" context creation */
 594   Display *dpy = fgDisplay.Display;
 595   GLXFBConfig config = *(window->Window.FBConfig);
 596   int render_type = ( !menu && index_mode ) ? GLX_COLOR_INDEX_TYPE : GLX_RGBA_TYPE;
 597   GLXContext share_list = NULL;
 598   Bool direct = ( fgState.DirectContext != GLUT_FORCE_INDIRECT_CONTEXT );
 599   GLXContext context;
 600
 601   /* new context creation */
 602   int attribs[7];
 603   CreateContextAttribsProc createContextAttribs;
 604
 605   /* If nothing fancy has been required, simply use the old context creation GLX API entry */
 606   if ( fgState.MajorVersion == 1 && fgState.MinorVersion == 0 && fgState.ContextFlags == 0)
 607   {
 608     context = glXCreateNewContext( dpy, config, render_type, share_list, direct );
 609     if ( context == NULL ) {
 610       fgError( "could not create new OpenGL context" );
 611     }
 612     return context;
 613   }
 614
 615   /* color index mode is not available anymore with OpenGL 3.0 */
 616   if ( render_type == GLX_COLOR_INDEX_TYPE ) {
 617     fgWarning( "color index mode is deprecated, using RGBA mode" );
 618   }
 619
 620   attribs[0] = GLX_CONTEXT_MAJOR_VERSION_ARB;
 621   attribs[1] = fgState.MajorVersion;
 622   attribs[2] = GLX_CONTEXT_MINOR_VERSION_ARB;
 623   attribs[3] = fgState.MinorVersion;
 624   attribs[4] = GLX_CONTEXT_FLAGS_ARB;
 625   attribs[5] = ((fgState.ContextFlags & GLUT_DEBUG) ? GLX_CONTEXT_DEBUG_BIT_ARB : 0) |
 626     ((fgState.ContextFlags & GLUT_FORWARD_COMPATIBLE) ? GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB : 0);
 627   attribs[6] = 0;
 628
 629   createContextAttribs = (CreateContextAttribsProc) fghGetProcAddress( "glXCreateContextAttribsARB" );
 630   if ( createContextAttribs == NULL ) {
 631     fgError( "glXCreateContextAttribsARB not found" );
 632   }
 633
 634   context = createContextAttribs( dpy, config, share_list, direct, attribs );
 635   if ( context == NULL ) {
 636     fgError( "could not create new OpenGL %d.%d context (flags %x)",
 637              fgState.MajorVersion, fgState.MinorVersion, fgState.ContextFlags );
 638   }
 639   return context;
 640 }
 641 #endif
 642
 643
 644 /*
 645  * Opens a window. Requires a SFG_Window object created and attached
 646  * to the freeglut structure. OpenGL context is created here.
 647  */
 648 void fgOpenWindow( SFG_Window* window, const char* title,
 649                    GLboolean positionUse, int x, int y,
 650                    GLboolean sizeUse, int w, int h,
 651                    GLboolean gameMode, GLboolean isSubWindow )
 652 {
 653 #if TARGET_HOST_POSIX_X11
 654     XVisualInfo * visualInfo;
 655     XSetWindowAttributes winAttr;
 656     XTextProperty textProperty;
 657     XSizeHints sizeHints;
 658     XWMHints wmHints;
 659     unsigned long mask;
 660     unsigned int current_DisplayMode = fgState.DisplayMode ;
 661
 662     /* Save the display mode if we are creating a menu window */
 663     if( window->IsMenu && ( ! fgStructure.MenuContext ) )
 664         fgState.DisplayMode = GLUT_DOUBLE | GLUT_RGB ;
 665
 666     window->Window.FBConfig = fgChooseFBConfig( );
 667
 668     if( window->IsMenu && ( ! fgStructure.MenuContext ) )
 669         fgState.DisplayMode = current_DisplayMode ;
 670
 671     if( ! window->Window.FBConfig )
 672     {
 673         /*
 674          * The "fgChooseFBConfig" returned a null meaning that the visual
 675          * context is not available.
 676          * Try a couple of variations to see if they will work.
 677          */
 678         if( !( fgState.DisplayMode & GLUT_DOUBLE ) )
 679         {
 680             fgState.DisplayMode |= GLUT_DOUBLE ;
 681             window->Window.FBConfig = fgChooseFBConfig( );
 682             fgState.DisplayMode &= ~GLUT_DOUBLE;
 683         }
 684
 685         if( fgState.DisplayMode & GLUT_MULTISAMPLE )
 686         {
 687             fgState.DisplayMode &= ~GLUT_MULTISAMPLE ;
 688             window->Window.FBConfig = fgChooseFBConfig( );
 689             fgState.DisplayMode |= GLUT_MULTISAMPLE;
 690         }
 691     }
 692
 693     FREEGLUT_INTERNAL_ERROR_EXIT( window->Window.FBConfig != NULL,
 694                                   "FBConfig with necessary capabilities not found", "fgOpenWindow" );
 695
 696     /*  Get the X visual.  */
 697     visualInfo = glXGetVisualFromFBConfig( fgDisplay.Display,
 698                                            *(window->Window.FBConfig) );
 699
 700     /*
 701      * XXX HINT: the masks should be updated when adding/removing callbacks.
 702      * XXX       This might speed up message processing. Is that true?
 703      * XXX
 704      * XXX A: Not appreciably, but it WILL make it easier to debug.
 705      * XXX    Try tracing old GLUT and try tracing freeglut.  Old GLUT
 706      * XXX    turns off events that it doesn't need and is a whole lot
 707      * XXX    more pleasant to trace.  (Think mouse-motion!  Tons of
 708      * XXX    ``bonus'' GUI events stream in.)
 709      */
 710     winAttr.event_mask        =
 711         StructureNotifyMask | SubstructureNotifyMask | ExposureMask |
 712         ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
 713         VisibilityChangeMask | EnterWindowMask | LeaveWindowMask |
 714         PointerMotionMask | ButtonMotionMask;
 715     winAttr.background_pixmap = None;
 716     winAttr.background_pixel  = 0;
 717     winAttr.border_pixel      = 0;
 718
 719     winAttr.colormap = XCreateColormap(
 720         fgDisplay.Display, fgDisplay.RootWindow,
 721         visualInfo->visual, AllocNone
 722     );
 723
 724     mask = CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask;
 725
 726     if( window->IsMenu || ( gameMode == GL_TRUE ) )
 727     {
 728         winAttr.override_redirect = True;
 729         mask |= CWOverrideRedirect;
 730     }
 731
 732     if( ! positionUse )
 733         x = y = -1; /* default window position */
 734     if( ! sizeUse )
 735         w = h = 300; /* default window size */
 736
 737     window->Window.Handle = XCreateWindow(
 738         fgDisplay.Display,
 739         window->Parent == NULL ? fgDisplay.RootWindow :
 740         window->Parent->Window.Handle,
 741         x, y, w, h, 0,
 742         visualInfo->depth, InputOutput,
 743         visualInfo->visual, mask,
 744         &winAttr
 745     );
 746
 747     /*
 748      * The GLX context creation, possibly trying the direct context rendering
 749      *  or else use the current context if the user has so specified
 750      */
 751
 752     if( window->IsMenu )
 753     {
 754         /*
 755          * If there isn't already an OpenGL rendering context for menu
 756          * windows, make one
 757          */
 758         if( !fgStructure.MenuContext )
 759         {
 760             fgStructure.MenuContext =
 761                 (SFG_MenuContext *)malloc( sizeof(SFG_MenuContext) );
 762             fgStructure.MenuContext->MContext = fghCreateNewContext( window );
 763         }
 764
 765         /* window->Window.Context = fgStructure.MenuContext->MContext; */
 766         window->Window.Context = fghCreateNewContext( window );
 767     }
 768     else if( fgState.UseCurrentContext )
 769     {
 770         window->Window.Context = glXGetCurrentContext( );
 771
 772         if( ! window->Window.Context )
 773             window->Window.Context = fghCreateNewContext( window );
 774     }
 775     else
 776         window->Window.Context = fghCreateNewContext( window );
 777
 778 #if !defined( __FreeBSD__ ) && !defined( __NetBSD__ )
 779     if(  !glXIsDirect( fgDisplay.Display, window->Window.Context ) )
 780     {
 781       if( fgState.DirectContext == GLUT_FORCE_DIRECT_CONTEXT )
 782         fgError( "Unable to force direct context rendering for window '%s'",
 783                  title );
 784     }
 785 #endif
 786
 787     /*
 788      * XXX Assume the new window is visible by default
 789      * XXX Is this a  safe assumption?
 790      */
 791     window->State.Visible = GL_TRUE;
 792
 793     sizeHints.flags = 0;
 794     if ( positionUse )
 795         sizeHints.flags |= USPosition;
 796     if ( sizeUse )
 797         sizeHints.flags |= USSize;
 798
 799     /*
 800      * Fill in the size hints values now (the x, y, width and height
 801      * settings are obsolete, are there any more WMs that support them?)
 802      * Unless the X servers actually stop supporting these, we should
 803      * continue to fill them in.  It is *not* our place to tell the user
 804      * that they should replace a window manager that they like, and which
 805      * works, just because *we* think that it's not "modern" enough.
 806      */
 807     sizeHints.x      = x;
 808     sizeHints.y      = y;
 809     sizeHints.width  = w;
 810     sizeHints.height = h;
 811
 812     wmHints.flags = StateHint;
 813     wmHints.initial_state = fgState.ForceIconic ? IconicState : NormalState;
 814     /* Prepare the window and iconified window names... */
 815     XStringListToTextProperty( (char **) &title, 1, &textProperty );
 816
 817     XSetWMProperties(
 818         fgDisplay.Display,
 819         window->Window.Handle,
 820         &textProperty,
 821         &textProperty,
 822         0,
 823         0,
 824         &sizeHints,
 825         &wmHints,
 826         NULL
 827     );
 828     XFree( textProperty.value );
 829
 830     XSetWMProtocols( fgDisplay.Display, window->Window.Handle,
 831                      &fgDisplay.DeleteWindow, 1 );
 832
 833     glXMakeContextCurrent(
 834         fgDisplay.Display,
 835         window->Window.Handle,
 836         window->Window.Handle,
 837         window->Window.Context
 838     );
 839
 840     XMapWindow( fgDisplay.Display, window->Window.Handle );
 841
 842     XFree(visualInfo);
 843
 844 #elif TARGET_HOST_MS_WINDOWS
 845
 846     WNDCLASS wc;
 847     DWORD flags;
 848     DWORD exFlags = 0;
 849     ATOM atom;
 850     int WindowStyle = 0;
 851
 852     /* Grab the window class we have registered on glutInit(): */
 853     atom = GetClassInfo( fgDisplay.Instance, _T("FREEGLUT"), &wc );
 854     FREEGLUT_INTERNAL_ERROR_EXIT ( atom, "Window Class Info Not Found",
 855                                    "fgOpenWindow" );
 856
 857     if( gameMode )
 858     {
 859         FREEGLUT_INTERNAL_ERROR_EXIT ( window->Parent == NULL,
 860                                        "Game mode being invoked on a subwindow",
 861                                        "fgOpenWindow" );
 862
 863         /*
 864          * Set the window creation flags appropriately to make the window
 865          * entirely visible:
 866          */
 867         flags = WS_POPUP | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
 868     }
 869     else
 870     {
 871         int worig = w, horig = h;
 872
 873 #if !defined(_WIN32_WCE)
 874         if ( ( ! isSubWindow ) && ( ! window->IsMenu ) )
 875         {
 876             /*
 877              * Update the window dimensions, taking account of window
 878              * decorations.  "freeglut" is to create the window with the
 879              * outside of its border at (x,y) and with dimensions (w,h).
 880              */
 881             w += (GetSystemMetrics( SM_CXSIZEFRAME ) )*2;
 882             h += (GetSystemMetrics( SM_CYSIZEFRAME ) )*2 +
 883                 GetSystemMetrics( SM_CYCAPTION );
 884         }
 885 #endif /* defined(_WIN32_WCE) */
 886
 887         if( ! positionUse )
 888         {
 889             x = CW_USEDEFAULT;
 890             y = CW_USEDEFAULT;
 891         }
 892         /* setting State.Width/Height to call resize callback later */
 893         if( ! sizeUse )
 894         {
 895             if( ! window->IsMenu )
 896             {
 897                 w = CW_USEDEFAULT;
 898                 h = CW_USEDEFAULT;
 899             }
 900             else /* fail safe - Windows can make a window of size (0, 0) */
 901                 w = h = 300; /* default window size */
 902             window->State.Width = window->State.Height = -1;
 903         }
 904         else
 905         {
 906             window->State.Width = worig;
 907             window->State.Height = horig;
 908         }
 909
 910         /*
 911          * There's a small difference between creating the top, child and
 912          * game mode windows
 913          */
 914         flags = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_VISIBLE;
 915
 916         if ( window->IsMenu )
 917         {
 918             flags |= WS_POPUP;
 919             exFlags |= WS_EX_TOOLWINDOW;
 920         }
 921 #if !defined(_WIN32_WCE)
 922         else if( window->Parent == NULL )
 923             flags |= WS_OVERLAPPEDWINDOW;
 924 #endif
 925         else
 926             flags |= WS_CHILD;
 927     }
 928
 929 #if defined(_WIN32_WCE)
 930     {
 931         wchar_t* wstr = fghWstrFromStr(title);
 932
 933         window->Window.Handle = CreateWindow(
 934             _T("FREEGLUT"),
 935             wstr,
 936             WS_VISIBLE | WS_POPUP,
 937             0,0, 240,320,
 938             NULL,
 939             NULL,
 940             fgDisplay.Instance,
 941             (LPVOID) window
 942         );
 943
 944         free(wstr);
 945
 946         SHFullScreen(window->Window.Handle, SHFS_HIDESTARTICON);
 947         SHFullScreen(window->Window.Handle, SHFS_HIDESIPBUTTON);
 948         SHFullScreen(window->Window.Handle, SHFS_HIDETASKBAR);
 949         MoveWindow(window->Window.Handle, 0, 0, 240, 320, TRUE);
 950         ShowWindow(window->Window.Handle, SW_SHOW);
 951         UpdateWindow(window->Window.Handle);
 952     }
 953 #else
 954     window->Window.Handle = CreateWindowEx(
 955         exFlags,
 956         _T("FREEGLUT"),
 957         title,
 958         flags,
 959         x, y, w, h,
 960         (HWND) window->Parent == NULL ? NULL : window->Parent->Window.Handle,
 961         (HMENU) NULL,
 962         fgDisplay.Instance,
 963         (LPVOID) window
 964     );
 965 #endif /* defined(_WIN32_WCE) */
 966
 967     if( !( window->Window.Handle ) )
 968         fgError( "Failed to create a window (%s)!", title );
 969
 970     /* Make a menu window always on top - fix Feature Request 947118 */
 971     if( window->IsMenu || gameMode )
 972         SetWindowPos(
 973                         window->Window.Handle,
 974                         HWND_TOPMOST,
 975                         0, 0, 0, 0,
 976                         SWP_NOMOVE | SWP_NOSIZE
 977                     );
 978
 979     /* Hack to remove the caption (title bar) and/or border
 980      * and all the system menu controls.
 981      */
 982     WindowStyle = GetWindowLong(window->Window.Handle, GWL_STYLE);
 983     if ( fgState.DisplayMode & GLUT_CAPTIONLESS )
 984     {
 985         SetWindowLong ( window->Window.Handle, GWL_STYLE,
 986                         WindowStyle & ~(WS_DLGFRAME | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX));
 987     }
 988     else if ( fgState.DisplayMode & GLUT_BORDERLESS )
 989     {
 990         SetWindowLong ( window->Window.Handle, GWL_STYLE,
 991                         WindowStyle & ~(WS_BORDER | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX));
 992     }
 993 /*  SetWindowPos(window->Window.Handle, NULL, 0, 0, 0, 0,
 994      SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED); */
 995
 996
 997 #if defined(_WIN32_WCE)
 998     ShowWindow( window->Window.Handle, SW_SHOW );
 999 #else
1000     ShowWindow( window->Window.Handle,
1001                 fgState.ForceIconic ? SW_SHOWMINIMIZED : SW_SHOW );
1002 #endif /* defined(_WIN32_WCE) */
1003
1004     UpdateWindow( window->Window.Handle );
1005     ShowCursor( TRUE );  /* XXX Old comments say "hide cursor"! */
1006
1007 #endif
1008
1009     fgSetWindow( window );
1010
1011     window->Window.DoubleBuffered =
1012         ( fgState.DisplayMode & GLUT_DOUBLE ) ? 1 : 0;
1013
1014     if ( ! window->Window.DoubleBuffered )
1015     {
1016         glDrawBuffer ( GL_FRONT );
1017         glReadBuffer ( GL_FRONT );
1018     }
1019 }
1020
1021 /*
1022  * Closes a window, destroying the frame and OpenGL context
1023  */
1024 void fgCloseWindow( SFG_Window* window )
1025 {
1026 #if TARGET_HOST_POSIX_X11
1027
1028     if( window->Window.Context )
1029         glXDestroyContext( fgDisplay.Display, window->Window.Context );
1030     XFree( window->Window.FBConfig );
1031     XDestroyWindow( fgDisplay.Display, window->Window.Handle );
1032     /* XFlush( fgDisplay.Display ); */ /* XXX Shouldn't need this */
1033
1034 #elif TARGET_HOST_MS_WINDOWS
1035
1036     /* Make sure we don't close a window with current context active */
1037     if( fgStructure.CurrentWindow == window )
1038         wglMakeCurrent( NULL, NULL );
1039
1040     /*
1041      * Step through the list of windows.  If the rendering context
1042      * is not being used by another window, then we delete it.
1043      */
1044     {
1045         int used = FALSE ;
1046         SFG_Window *iter ;
1047
1048         for( iter = (SFG_Window *)fgStructure.Windows.First;
1049              iter;
1050              iter = (SFG_Window *)iter->Node.Next )
1051         {
1052             if( ( iter->Window.Context == window->Window.Context ) &&
1053                 ( iter != window ) )
1054                 used = TRUE;
1055         }
1056
1057         if( ! used )
1058             wglDeleteContext( window->Window.Context );
1059     }
1060
1061     DestroyWindow( window->Window.Handle );
1062 #endif
1063 }
1064
1065
1066 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
1067
1068 /*
1069  * Creates a new top-level freeglut window
1070  */
1071 int FGAPIENTRY glutCreateWindow( const char* title )
1072 {
1073     /* XXX GLUT does not exit; it simply calls "glutInit" quietly if the
1074      * XXX application has not already done so.  The "freeglut" community
1075      * XXX decided not to go this route (freeglut-developer e-mail from
1076      * XXX Steve Baker, 12/16/04, 4:22 PM CST, "Re: [Freeglut-developer]
1077      * XXX Desired 'freeglut' behaviour when there is no current window"
1078      */
1079     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateWindow" );
1080
1081     return fgCreateWindow( NULL, title, fgState.Position.Use,
1082                            fgState.Position.X, fgState.Position.Y,
1083                            fgState.Size.Use, fgState.Size.X, fgState.Size.Y,
1084                            GL_FALSE, GL_FALSE )->ID;
1085 }
1086
1087 /*
1088  * This function creates a sub window.
1089  */
1090 int FGAPIENTRY glutCreateSubWindow( int parentID, int x, int y, int w, int h )
1091 {
1092     int ret = 0;
1093     SFG_Window* window = NULL;
1094     SFG_Window* parent = NULL;
1095
1096     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutCreateSubWindow" );
1097     parent = fgWindowByID( parentID );
1098     freeglut_return_val_if_fail( parent != NULL, 0 );
1099     if ( x < 0 )
1100     {
1101         x = parent->State.Width + x ;
1102         if ( w >= 0 ) x -= w ;
1103     }
1104
1105     if ( w < 0 ) w = parent->State.Width - x + w ;
1106     if ( w < 0 )
1107     {
1108         x += w ;
1109         w = -w ;
1110     }
1111
1112     if ( y < 0 )
1113     {
1114         y = parent->State.Height + y ;
1115         if ( h >= 0 ) y -= h ;
1116     }
1117
1118     if ( h < 0 ) h = parent->State.Height - y + h ;
1119     if ( h < 0 )
1120     {
1121         y += h ;
1122         h = -h ;
1123     }
1124
1125     window = fgCreateWindow( parent, "", GL_TRUE, x, y, GL_TRUE, w, h, GL_FALSE, GL_FALSE );
1126     ret = window->ID;
1127
1128     return ret;
1129 }
1130
1131 /*
1132  * Destroys a window and all of its subwindows
1133  */
1134 void FGAPIENTRY glutDestroyWindow( int windowID )
1135 {
1136     SFG_Window* window;
1137     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutDestroyWindow" );
1138     window = fgWindowByID( windowID );
1139     freeglut_return_if_fail( window != NULL );
1140     {
1141         fgExecutionState ExecState = fgState.ExecState;
1142         fgAddToWindowDestroyList( window );
1143         fgState.ExecState = ExecState;
1144     }
1145 }
1146
1147 /*
1148  * This function selects the current window
1149  */
1150 void FGAPIENTRY glutSetWindow( int ID )
1151 {
1152     SFG_Window* window = NULL;
1153
1154     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindow" );
1155     if( fgStructure.CurrentWindow != NULL )
1156         if( fgStructure.CurrentWindow->ID == ID )
1157             return;
1158
1159     window = fgWindowByID( ID );
1160     if( window == NULL )
1161     {
1162         fgWarning( "glutSetWindow(): window ID %d not found!", ID );
1163         return;
1164     }
1165
1166     fgSetWindow( window );
1167 }
1168
1169 /*
1170  * This function returns the ID number of the current window, 0 if none exists
1171  */
1172 int FGAPIENTRY glutGetWindow( void )
1173 {
1174     SFG_Window *win = fgStructure.CurrentWindow;
1175     /*
1176      * Since GLUT did not throw an error if this function was called without a prior call to
1177      * "glutInit", this function shouldn't do so here.  Instead let us return a zero.
1178      * See Feature Request "[ 1307049 ] glutInit check".
1179      */
1180     if ( ! fgState.Initialised )
1181         return 0;
1182
1183     while ( win && win->IsMenu )
1184         win = win->Parent;
1185     return win ? win->ID : 0;
1186 }
1187
1188 /*
1189  * This function makes the current window visible
1190  */
1191 void FGAPIENTRY glutShowWindow( void )
1192 {
1193     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutShowWindow" );
1194     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutShowWindow" );
1195
1196 #if TARGET_HOST_POSIX_X11
1197
1198     XMapWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1199     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1200
1201 #elif TARGET_HOST_MS_WINDOWS
1202
1203     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_SHOW );
1204
1205 #endif
1206
1207     fgStructure.CurrentWindow->State.Redisplay = GL_TRUE;
1208 }
1209
1210 /*
1211  * This function hides the current window
1212  */
1213 void FGAPIENTRY glutHideWindow( void )
1214 {
1215     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutHideWindow" );
1216     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutHideWindow" );
1217
1218 #if TARGET_HOST_POSIX_X11
1219
1220     if( fgStructure.CurrentWindow->Parent == NULL )
1221         XWithdrawWindow( fgDisplay.Display,
1222                          fgStructure.CurrentWindow->Window.Handle,
1223                          fgDisplay.Screen );
1224     else
1225         XUnmapWindow( fgDisplay.Display,
1226                       fgStructure.CurrentWindow->Window.Handle );
1227     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1228
1229 #elif TARGET_HOST_MS_WINDOWS
1230
1231     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_HIDE );
1232
1233 #endif
1234
1235     fgStructure.CurrentWindow->State.Redisplay = GL_FALSE;
1236 }
1237
1238 /*
1239  * Iconify the current window (top-level windows only)
1240  */
1241 void FGAPIENTRY glutIconifyWindow( void )
1242 {
1243     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutIconifyWindow" );
1244     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutIconifyWindow" );
1245
1246     fgStructure.CurrentWindow->State.Visible   = GL_FALSE;
1247 #if TARGET_HOST_POSIX_X11
1248
1249     XIconifyWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
1250                     fgDisplay.Screen );
1251     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1252
1253 #elif TARGET_HOST_MS_WINDOWS
1254
1255     ShowWindow( fgStructure.CurrentWindow->Window.Handle, SW_MINIMIZE );
1256
1257 #endif
1258
1259     fgStructure.CurrentWindow->State.Redisplay = GL_FALSE;
1260 }
1261
1262 /*
1263  * Set the current window's title
1264  */
1265 void FGAPIENTRY glutSetWindowTitle( const char* title )
1266 {
1267     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowTitle" );
1268     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowTitle" );
1269     if( ! fgStructure.CurrentWindow->Parent )
1270     {
1271 #if TARGET_HOST_POSIX_X11
1272
1273         XTextProperty text;
1274
1275         text.value = (unsigned char *) title;
1276         text.encoding = XA_STRING;
1277         text.format = 8;
1278         text.nitems = strlen( title );
1279
1280         XSetWMName(
1281             fgDisplay.Display,
1282             fgStructure.CurrentWindow->Window.Handle,
1283             &text
1284         );
1285
1286         XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1287
1288 #elif TARGET_HOST_MS_WINDOWS
1289 #    ifdef _WIN32_WCE
1290         {
1291             wchar_t* wstr = fghWstrFromStr(title);
1292             SetWindowText( fgStructure.CurrentWindow->Window.Handle, wstr );
1293             free(wstr);
1294         }
1295 #    else
1296         SetWindowText( fgStructure.CurrentWindow->Window.Handle, title );
1297 #    endif
1298
1299 #endif
1300     }
1301 }
1302
1303 /*
1304  * Set the current window's iconified title
1305  */
1306 void FGAPIENTRY glutSetIconTitle( const char* title )
1307 {
1308     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetIconTitle" );
1309     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetIconTitle" );
1310
1311     if( ! fgStructure.CurrentWindow->Parent )
1312     {
1313 #if TARGET_HOST_POSIX_X11
1314
1315         XTextProperty text;
1316
1317         text.value = (unsigned char *) title;
1318         text.encoding = XA_STRING;
1319         text.format = 8;
1320         text.nitems = strlen( title );
1321
1322         XSetWMIconName(
1323             fgDisplay.Display,
1324             fgStructure.CurrentWindow->Window.Handle,
1325             &text
1326         );
1327
1328         XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1329
1330 #elif TARGET_HOST_MS_WINDOWS
1331 #    ifdef _WIN32_WCE
1332         {
1333             wchar_t* wstr = fghWstrFromStr(title);
1334             SetWindowText( fgStructure.CurrentWindow->Window.Handle, wstr );
1335             free(wstr);
1336         }
1337 #    else
1338         SetWindowText( fgStructure.CurrentWindow->Window.Handle, title );
1339 #    endif
1340
1341 #endif
1342     }
1343 }
1344
1345 /*
1346  * Change the current window's size
1347  */
1348 void FGAPIENTRY glutReshapeWindow( int width, int height )
1349 {
1350     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutReshapeWindow" );
1351     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutReshapeWindow" );
1352
1353     if (glutGet(GLUT_FULL_SCREEN))
1354     {
1355       /*  Leave full screen state before resizing. */
1356       glutFullScreenToggle();
1357     }
1358
1359     fgStructure.CurrentWindow->State.NeedToResize = GL_TRUE;
1360     fgStructure.CurrentWindow->State.Width  = width ;
1361     fgStructure.CurrentWindow->State.Height = height;
1362 }
1363
1364 /*
1365  * Change the current window's position
1366  */
1367 void FGAPIENTRY glutPositionWindow( int x, int y )
1368 {
1369     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPositionWindow" );
1370     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPositionWindow" );
1371
1372     if (glutGet(GLUT_FULL_SCREEN))
1373     {
1374       /*  Leave full screen state before moving. */
1375       glutFullScreenToggle();
1376     }
1377
1378 #if TARGET_HOST_POSIX_X11
1379
1380     XMoveWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
1381                  x, y );
1382     XFlush( fgDisplay.Display ); /* XXX Shouldn't need this */
1383
1384 #elif TARGET_HOST_MS_WINDOWS
1385
1386     {
1387         RECT winRect;
1388
1389         /* "GetWindowRect" returns the pixel coordinates of the outside of the window */
1390         GetWindowRect( fgStructure.CurrentWindow->Window.Handle, &winRect );
1391         MoveWindow(
1392             fgStructure.CurrentWindow->Window.Handle,
1393             x,
1394             y,
1395             winRect.right - winRect.left,
1396             winRect.bottom - winRect.top,
1397             TRUE
1398         );
1399     }
1400
1401 #endif
1402 }
1403
1404 /*
1405  * Lowers the current window (by Z order change)
1406  */
1407 void FGAPIENTRY glutPushWindow( void )
1408 {
1409     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPushWindow" );
1410     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPushWindow" );
1411
1412 #if TARGET_HOST_POSIX_X11
1413
1414     XLowerWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1415
1416 #elif TARGET_HOST_MS_WINDOWS
1417
1418     SetWindowPos(
1419         fgStructure.CurrentWindow->Window.Handle,
1420         HWND_BOTTOM,
1421         0, 0, 0, 0,
1422         SWP_NOSIZE | SWP_NOMOVE
1423     );
1424
1425 #endif
1426 }
1427
1428 /*
1429  * Raises the current window (by Z order change)
1430  */
1431 void FGAPIENTRY glutPopWindow( void )
1432 {
1433     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutPopWindow" );
1434     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutPopWindow" );
1435
1436 #if TARGET_HOST_POSIX_X11
1437
1438     XRaiseWindow( fgDisplay.Display, fgStructure.CurrentWindow->Window.Handle );
1439
1440 #elif TARGET_HOST_MS_WINDOWS
1441
1442     SetWindowPos(
1443         fgStructure.CurrentWindow->Window.Handle,
1444         HWND_TOP,
1445         0, 0, 0, 0,
1446         SWP_NOSIZE | SWP_NOMOVE
1447     );
1448
1449 #endif
1450 }
1451
1452 /*
1453  * Resize the current window so that it fits the whole screen
1454  */
1455 void FGAPIENTRY glutFullScreen( void )
1456 {
1457     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreen" );
1458     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreen" );
1459
1460     if (glutGet(GLUT_FULL_SCREEN))
1461     {
1462       /*  Leave full screen state before resizing. */
1463       glutFullScreenToggle();
1464     }
1465
1466     {
1467 #if TARGET_HOST_POSIX_X11
1468
1469         Status status;  /* Returned by XGetWindowAttributes(), not checked. */
1470         XWindowAttributes attributes;
1471
1472         status = XGetWindowAttributes(fgDisplay.Display,
1473                                       fgStructure.CurrentWindow->Window.Handle,
1474                                       &attributes);
1475         /*
1476          * The "x" and "y" members of "attributes" are the window's coordinates
1477          * relative to its parent, i.e. to the decoration window.
1478          */
1479         XMoveResizeWindow(fgDisplay.Display,
1480                           fgStructure.CurrentWindow->Window.Handle,
1481                           -attributes.x,
1482                           -attributes.y,
1483                           fgDisplay.ScreenWidth,
1484                           fgDisplay.ScreenHeight);
1485
1486 #elif TARGET_HOST_MS_WINDOWS && !defined(_WIN32_WCE) /* FIXME: what about WinCE */
1487         RECT rect;
1488
1489         /* For fullscreen mode, force the top-left corner to 0,0
1490          * and adjust the window rectangle so that the client area
1491          * covers the whole screen.
1492          */
1493
1494         rect.left   = 0;
1495         rect.top    = 0;
1496         rect.right  = fgDisplay.ScreenWidth;
1497         rect.bottom = fgDisplay.ScreenHeight;
1498
1499         AdjustWindowRect ( &rect, WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS |
1500                                   WS_CLIPCHILDREN, FALSE );
1501
1502         /*
1503          * SWP_NOACTIVATE     Do not activate the window
1504          * SWP_NOOWNERZORDER  Do not change position in z-order
1505          * SWP_NOSENDCHANGING Supress WM_WINDOWPOSCHANGING message
1506          * SWP_NOZORDER       Retains the current Z order (ignore 2nd param)
1507          */
1508
1509         SetWindowPos( fgStructure.CurrentWindow->Window.Handle,
1510                       HWND_TOP,
1511                       rect.left,
1512                       rect.top,
1513                       rect.right  - rect.left,
1514                       rect.bottom - rect.top,
1515                       SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING |
1516                       SWP_NOZORDER
1517                     );
1518 #endif
1519     }
1520 }
1521
1522 /*
1523  * Toggle the window's full screen state.
1524  */
1525 void FGAPIENTRY glutFullScreenToggle( void )
1526 {
1527     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutFullScreenToggle" );
1528     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutFullScreenToggle" );
1529
1530     {
1531 #if TARGET_HOST_POSIX_X11
1532
1533       if (fgDisplay.StateFullScreen != None)
1534       {
1535         XEvent xevent;
1536         long event_mask;
1537         int status;
1538
1539         xevent.type = ClientMessage;
1540         xevent.xclient.type = ClientMessage;
1541         xevent.xclient.serial = 0;
1542         xevent.xclient.send_event = True;
1543         xevent.xclient.display = fgDisplay.Display;
1544         xevent.xclient.window = fgStructure.CurrentWindow->Window.Handle;
1545         xevent.xclient.message_type = fgDisplay.State;
1546         xevent.xclient.format = 32;
1547         xevent.xclient.data.l[0] = 2;  /* _NET_WM_STATE_TOGGLE */
1548         xevent.xclient.data.l[1] = fgDisplay.StateFullScreen;
1549         xevent.xclient.data.l[2] = 0;
1550         xevent.xclient.data.l[3] = 0;
1551         xevent.xclient.data.l[4] = 0;
1552
1553         /*** Don't really understand how event masks work... ***/
1554         event_mask = SubstructureRedirectMask | SubstructureNotifyMask;
1555
1556         status = XSendEvent(fgDisplay.Display,
1557           fgDisplay.RootWindow,
1558           False,
1559           event_mask,
1560           &xevent);
1561         FREEGLUT_INTERNAL_ERROR_EXIT(status != 0,
1562           "XSendEvent failed",
1563           "glutFullScreenToggle");
1564       }
1565       else
1566 #endif
1567       {
1568         /*
1569          * If the window manager is not Net WM compliant, fall back to legacy
1570          * behaviour.
1571          */
1572         glutFullScreen();
1573       }
1574     }
1575 }
1576
1577 /*
1578  * A.Donev: Set and retrieve the window's user data
1579  */
1580 void* FGAPIENTRY glutGetWindowData( void )
1581 {
1582     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutGetWindowData" );
1583     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutGetWindowData" );
1584     return fgStructure.CurrentWindow->UserData;
1585 }
1586
1587 void FGAPIENTRY glutSetWindowData(void* data)
1588 {
1589     FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetWindowData" );
1590     FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetWindowData" );
1591     fgStructure.CurrentWindow->UserData = data;
1592 }
1593
1594 /*** END OF FILE ***/