1 files changed, 53 insertions, 36 deletions

diff --git a/src/glut/fbdev/fbdev.c b/src/glut/fbdev/fbdev.c
index ce6419816dd..3b63cd70ea1 100644
--- a/src/glut/fbdev/fbdev.c
+++ b/src/glut/fbdev/fbdev.c
@@ -74,6 +74,7 @@ int Redisplay;
 int Visible;
 int VisibleSwitch;
 int Active;
+static int Resized;
 /* we have to poll to see if we are visible
    on a framebuffer that is not active */
 int VisiblePoll;
@@ -127,8 +128,10 @@ static void Cleanup(void)
 	 fprintf(stderr, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
 		 strerror(errno));
 
-      munmap(FrameBuffer, FixedInfo.smem_len);
+      if(FrameBuffer)
+         munmap(FrameBuffer, FixedInfo.smem_len);
       close(FrameBufferFD);
+
    }
 
    /* free allocated back buffer */
@@ -424,6 +427,8 @@ static void ProcessTimers(void)
 
 void glutMainLoop(void)
 {
+   int idleiters;
+
    if(ReshapeFunc)
       ReshapeFunc(VarInfo.xres, VarInfo.yres);
 
@@ -440,8 +445,6 @@ void glutMainLoop(void)
       else
 	 if(VisiblePoll)
 	    TestVisible();
-	 else
-	    usleep(1);
 
       if(IdleFunc)
 	 IdleFunc();
@@ -452,17 +455,48 @@ void glutMainLoop(void)
 	    VisibilityFunc(Visible ? GLUT_VISIBLE : GLUT_NOT_VISIBLE);
       }
 
+      if(Resized) {
+         SetVideoMode();
+         CreateBuffer();
+
+         if(!glFBDevMakeCurrent( Context, Buffer, Buffer )) {
+            sprintf(exiterror, "Failure to Make Current\n");
+            exit(0);
+         }
+
+         InitializeMenus();
+
+         if(ReshapeFunc)
+            ReshapeFunc(VarInfo.xres, VarInfo.yres);
+
+         Redisplay = 1;
+         Resized = 0;
+      }
+
       if(Visible && Redisplay) {
 	 Redisplay = 0;
-	 if(MouseEnabled)
-	    EraseCursor();
+         EraseCursor();
 	 DisplayFunc();
 	 if(!(DisplayMode & GLUT_DOUBLE)) {
 	    if(ActiveMenu)
 	       DrawMenus();
-	    if(MouseEnabled)
-	       DrawCursor();
+            DrawCursor();
 	 }
+         idleiters = 0;
+      } else {
+         /* we sleep if not receiving redisplays, and
+            the main loop is running faster than 2khz */
+
+         static int lasttime;
+         int time = glutGet(GLUT_ELAPSED_TIME);
+         if(time > lasttime) {
+            if(idleiters >= 2)
+               usleep(100);
+
+            idleiters = 0;
+            lasttime = time;
+         }
+         idleiters++;         
       }
    }
 }
@@ -536,17 +570,16 @@ int ParseFBModes(int minw, int maxw, int minh, int maxh, int minf, int maxf)
    return 0;
 }
 
-/* ---------- Window Management ----------*/
 void SetVideoMode(void)
 {
    /* set new variable screen info */
    if (ioctl(FrameBufferFD, FBIOPUT_VSCREENINFO, &VarInfo)) {
-      sprintf(exiterror, "ioctl(FBIOPUT_VSCREENINFO failed): %s\n",
-	      strerror(errno));
+      sprintf(exiterror, "FBIOPUT_VSCREENINFO failed: %s\n", strerror(errno));
+      strcat(exiterror, "Perhaps the device does not support the selected mode\n");
       exit(0);
    }
 
-   /* reload the screen info to update offsets */
+   /* reload the screen info to update rgb bits */
    if (ioctl(FrameBufferFD, FBIOGET_VSCREENINFO, &VarInfo)) {
       sprintf(exiterror, "error: ioctl(FBIOGET_VSCREENINFO) failed: %s\n",
 	      strerror(errno));
@@ -574,7 +607,7 @@ void SetVideoMode(void)
    LoadColorMap();
 }
 
-void CreateBuffer()
+void CreateBuffer(void)
 {
    int size = VarInfo.xres_virtual * VarInfo.yres_virtual
                               * VarInfo.bits_per_pixel / 8;
@@ -673,20 +706,6 @@ void CreateVisual(void)
    }
 }
 
-static void ResizeVisual(void)
-{ 
-   if(!glFBDevMakeCurrent( Context, Buffer, Buffer )) {
-      sprintf(exiterror, "Failure to Make Current\n");
-      exit(0);
-   }
-
-   InitializeMenus();
-
-   if(ReshapeFunc)
-      ReshapeFunc(VarInfo.xres, VarInfo.yres);
-   Redisplay = 1;
-}
-
 static void SignalWinch(int arg)
 {
    /* we can't change bitdepth without destroying the visual */
@@ -708,10 +727,7 @@ static void SignalWinch(int arg)
    VarInfo.blue = blue;
    VarInfo.transp = transp;
 
-   SetVideoMode();
-   CreateBuffer();
-
-   ResizeVisual();
+   Resized = 1;
 }
 
 int glutCreateWindow (const char *title)
@@ -786,6 +802,7 @@ void glutDestroyWindow(int win)
    glFBDevDestroyContext(Context);
    glFBDevDestroyBuffer(Buffer);
    glFBDevDestroyVisual(Visual);
+  
    Visual = NULL;
 }
 
@@ -803,12 +820,14 @@ void glutSwapBuffers(void)
 {
    glFlush();
 
+   if(!(DisplayMode & GLUT_DOUBLE))
+      return;
+
    if(ActiveMenu)
       DrawMenus();
-   if(MouseEnabled)
-      DrawCursor();
+   DrawCursor();
 
-   if(DisplayMode & GLUT_DOUBLE && Visible) {
+   if(Visible) {
       Swapping = 1;
       glFBDevSwapBuffers(Buffer);
       Swapping = 0;
@@ -837,10 +856,8 @@ void glutReshapeWindow(int width, int height)
    signal(SIGWINCH, SIG_IGN);
 
    SetVideoMode();
-   CreateBuffer();
-
-   ResizeVisual();
    signal(SIGWINCH, SignalWinch);
+   Resized = 1;
 }
 
 void glutFullScreen(void)