Re: [gtk-list] Re: Problem adding GdkRgb

["D. Jackson Peacock" <pavon gallup net>]

I'm doing something simular and can't figure out why i keep getting core
dumps. heres the code where i set up the rgb buffer and then try to draw
it. It dumps core in gdk_draw_rgb_image;

/* Backing rgb image for drawing area */
static guchar *buff = NULL;
static int buff_width;
static int buff_height;
static int buff_size;      /* = width * height * 3 */
static int buff_rowstride; /* rowstride: width * 3 */  

/* Create a new backing rgb image of the appropriate size */
static gint configure_event (GtkWidget *widget, GdkEventConfigure *event){
  buff_width = widget->allocation.width;
  buff_height = widget->allocation.height;
  buff_size = buff_width * buff_height * 3;
  buff_rowstride = buff_width * 3;

  if (buff)
    free (buff);
  buff = (guchar *) malloc (buff_size);
  memset(buff, (guchar)0, buff_size); /* set the image to all black */
  return TRUE;
}

/* Redraw the screen from the backing rgb image */
static gint expose_event (GtkWidget *widget, GdkEventExpose *event){
  gdk_draw_rgb_image (widget->window, 
		      widget->style->fg_gc[GTK_STATE_NORMAL],
		      0,0, buff_width, buff_height, 
		      GDK_RGB_DITHER_NONE, buff, buff_rowstride);  
  return FALSE;
}



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