+static inline GBool fixBBox(int*x1, int*y1, int*x2, int*y2, int width, int height)
+{
+ if(!(*x1|*y1|*x2|*y2)) {
+ // undefined bbox
+ *x1 = *y1 = 0;
+ *x2 = width;
+ *y2 = height;
+ return gTrue;
+ }
+ if(*x2<=*x1) return gFalse;
+ if(*x2<0) return gFalse;
+ if(*x1<0) *x1 = 0;
+ if(*x1>=width) return gFalse;
+ if(*x2>width) *x2=width;
+
+ if(*y2<=*y1) return gFalse;
+ if(*y2<0) return gFalse;
+ if(*y1<0) *y1 = 0;
+ if(*y1>=height) return gFalse;
+ if(*y2>height) *y2=height;
+ return gTrue;
+}
+