XF86 game mode fixes, context sharing option. (John Fay)

git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@108 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/include/GL/freeglut_ext.h

@@ -39,6 +39,12 @@
 #define GLUT_ACTION_GLUTMAINLOOP_RETURNS         1
 #define GLUT_ACTION_CONTINUE_EXECUTION           2
 
+/*
+ * Create a new rendering context when the user opens a new window?
+ */
+#define GLUT_CREATE_NEW_CONTEXT                  0
+#define GLUT_USE_CURRENT_CONTEXT                 1
+
 /*
  * GLUT API Extension macro definitions -- the glutGet parameters
  */
@@ -49,6 +55,8 @@
 
 #define  GLUT_VERSION                       0x01FC
 
+#define  GLUT_RENDERING_CONTEXT             0x01FD
+
 /*
  * Process loop function, see freeglut_main.c
  */

freeglut/freeglut/src/freeglut_init.c

@@ -61,6 +61,7 @@ SFG_State fgState = { { -1, -1, FALSE },  /* Position */
                       FALSE, /* ForceDirectContext */
                       TRUE,  /* TryDirectContext */
                       FALSE, /* ForceIconic */
+                      FALSE, /* UseCurrentContext */
                       FALSE, /* GLDebugSwitch */
                       FALSE, /* XSyncSwitch */
                       TRUE,  /* IgnoreKeyRepeat */
@@ -306,6 +307,7 @@ void fgDeinitialize( void )
     fgState.ForceDirectContext  = FALSE;
     fgState.TryDirectContext    = TRUE;
     fgState.ForceIconic         = FALSE;
+    fgState.UseCurrentContext   = FALSE;
     fgState.GLDebugSwitch       = FALSE;
     fgState.XSyncSwitch         = FALSE;
     fgState.ActionOnWindowClose = GLUT_ACTION_EXIT ;
@@ -395,7 +397,8 @@ void FGAPIENTRY glutInit( int* pargc, char** argv )
     /* check if GLUT_FPS env var is set */
     {
       const char *fps = getenv ( "GLUT_FPS" );
-        if (fps) {
+      if ( fps )
+      {
         sscanf ( fps, "%d", &fgState.FPSInterval ) ;
         if ( fgState.FPSInterval <= 0 )
           fgState.FPSInterval = 5000 ;  /* 5000 milliseconds */

freeglut/freeglut/src/freeglut_internal.h

@@ -219,6 +219,7 @@ struct tagSFG_State
     GLboolean        TryDirectContext;     /* What about giving a try to?       */
 
     GLboolean        ForceIconic;          /* All new top windows are iconified */
+    GLboolean        UseCurrentContext;    /* New windows use current window's rendering context */
 
     GLboolean        GLDebugSwitch;        /* OpenGL state debugging switch     */
     GLboolean        XSyncSwitch;          /* X11 sync protocol switch          */
@@ -260,6 +261,11 @@ struct tagSFG_Display
     Atom            DeleteWindow;       /* The window deletion atom          */
 
 #ifdef X_XF86VidModeGetModeLine
+    /*
+     * XF86VidMode may be compilable even if it fails at runtime.  Therefore,
+     * the validity of the VidMode has to be tracked
+     */
+    int             DisplayModeValid;   /* Flag that indicates runtime status*/
     XF86VidModeModeLine DisplayMode;    /* Current screen's display settings */
     int             DisplayModeClock;   /* The display mode's refresh rate   */
 #endif

freeglut/freeglut/src/freeglut_main.c

@@ -1175,8 +1175,11 @@ LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPara
         fgSetupPixelFormat( window, FALSE, PFD_MAIN_PLANE );
 
         /*
-         * Create the OpenGL rendering context now
+         * Create or get the OpenGL rendering context now
          */
+        if ( fgState.UseCurrentContext == TRUE )
+          window->Window.Context = wglGetCurrentContext();
+        else
           window->Window.Context = wglCreateContext( window->Window.Device );
 
         /*
@@ -1287,8 +1290,20 @@ LRESULT CALLBACK fgWindowProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPara
          */
         if( fgStructure.Window == window )
         {
+          int used = FALSE ;
+          SFG_Window *iter ;
+
             wglMakeCurrent( NULL, NULL );
-            wglDeleteContext( window->Window.Context );
+            /* Step through the list of windows.  If the rendering context is notbeing used
+             * by another window, then we delete it.
+             */
+            for ( iter = fgStructure.Windows.First; iter; iter = iter->Node.Next )
+            {
+              if ( ( iter->Window.Context == window->Window.Context ) && ( iter != window ) )
+                used = TRUE ;
+            }
+
+            if ( used == FALSE ) wglDeleteContext( window->Window.Context );
         }
 
         /*

freeglut/freeglut/src/freeglut_state.c

@@ -104,6 +104,9 @@ void FGAPIENTRY glutSetOption( GLenum eWhat, int value )
   case GLUT_ACTION_ON_WINDOW_CLOSE: fgState.ActionOnWindowClose = value ;
                                     break ;
 
+  case GLUT_RENDERING_CONTEXT:      fgState.UseCurrentContext   = ( value == GLUT_USE_CURRENT_CONTEXT ) ? TRUE : FALSE ;
+                                    break ;
+
   case GLUT_WINDOW_CURSOR:
       if( fgStructure.Window != NULL ) fgStructure.Window->State.Cursor = value ;
       break ;
@@ -364,8 +367,7 @@ int FGAPIENTRY glutGet( GLenum eWhat )
         /*
          * ...then we've got to correct the results we've just received...
          */
-        if (fgStructure.GameMode != fgStructure.Window &&
+        if ( ( fgStructure.GameMode != fgStructure.Window ) && ( fgStructure.Window->Parent == NULL ) )
-	    fgStructure.Window->Parent == NULL )
         {
           winRect.left   += GetSystemMetrics( SM_CXSIZEFRAME );
           winRect.right  -= GetSystemMetrics( SM_CXSIZEFRAME );
@@ -457,6 +459,9 @@ int FGAPIENTRY glutGet( GLenum eWhat )
     case GLUT_VERSION :
         return VERSION_MAJOR * 10000 + VERSION_MINOR * 100 + VERSION_PATCH ;
 
+    case GLUT_RENDERING_CONTEXT:
+        return ( fgState.UseCurrentContext ? GLUT_USE_CURRENT_CONTEXT : GLUT_CREATE_NEW_CONTEXT ) ;
+
     default:
         /*
          * Just have it reported, so that we can see what needs to be implemented

freeglut/freeglut/src/freeglut_stroke_mono_roman.c

@@ -2,9 +2,7 @@
 /* This file has been automatically generated by the genstroke utility. */
 
 #include "freeglut_internal.h"
-//#ifdef TARGET_HOST_WIN32
+
-//#pragma warning ( once:4305 )
-//#endif
 /* char: 0x20 */
 
 static const SFG_StrokeStrip ch32st[] =