Add center_image proc

code/__HELPERS/unsorted.dm

@@ -1,3 +1,4 @@
+
 //This file was auto-corrected by findeclaration.exe on 25.5.2012 20:42:31
 
 /*
@@ -1765,3 +1766,38 @@ var/mob/dview/dview_mob = new
 	if(orbiting)
 		loc = get_turf(orbiting)
 		orbiting = null
+		
+//Centers an image.
+//Requires:
+//The Image
+//The x dimension of the icon file used in the image
+//The y dimension of the icon file used in the image
+// eg: center_image(I, 32,32)
+// eg2: center_image(I, 96,96)
+/proc/center_image(var/image/I, x_dimension = 0, y_dimension = 0)
+	if(!I)
+		return
+
+	if(!x_dimension || !y_dimension)
+		return
+
+	//Get out of here, punk ass kids calling procs needlessly
+	if((x_dimension == world.icon_size) && (y_dimension == world.icon_size))
+		return I
+
+	//Offset the image so that it's bottom left corner is shifted this many pixels
+	//This makes it infinitely easier to draw larger inhands/images larger than world.iconsize
+	//but still use them in game
+	var/x_offset = -((x_dimension/world.icon_size)-1)*(world.icon_size*0.5)
+	var/y_offset = -((y_dimension/world.icon_size)-1)*(world.icon_size*0.5)
+
+	//Correct values under world.icon_size
+	if(x_dimension < world.icon_size)
+		x_offset *= -1
+	if(y_dimension < world.icon_size)
+		y_offset *= -1
+
+	I.pixel_x = x_offset
+	I.pixel_y = y_offset
+
+	return I