lib/squib/graphics/save_images.rb in squib-0.0.2 vs lib/squib/graphics/save_images.rb in squib-0.0.3

@@ -1,11 +1,33 @@
-module Squib
-  class Card
-
-    # :nodoc:
-    # @api private 
-    def save_png(i, dir, prefix)
-      cairo_context.target.write_to_png("#{dir}/#{prefix}#{i}.png")
-    end
-
-  end
+module Squib
+  class Card
+
+    # :nodoc:
+    # @api private 
+    def save_png(i, dir, prefix, do_rotate, angle)
+      if [true, :clockwise, :counterclockwise].include?(do_rotate)
+        surface = rotated_image(angle)
+      else
+        surface = @cairo_surface
+      end
+      write_png(surface, i, dir, prefix)
+    end
+
+    # :nodoc:
+    # @api private
+    def rotated_image(angle)
+      rotated_cc = Cairo::Context.new(Cairo::ImageSurface.new(@height, @width) )
+      rotated_cc.translate(@height * 0.5, @width * 0.5)
+      rotated_cc.rotate(angle)
+      rotated_cc.translate(@width * -0.5, @height * -0.5)
+      rotated_cc.set_source(@cairo_surface)
+      rotated_cc.paint
+      rotated_cc.target
+    end
+    # :nodoc:
+    # @api private 
+    def write_png(surface, i, dir, prefix)
+      surface.write_to_png("#{dir}/#{prefix}#{i}.png")
+    end
+
+  end
 end
\ No newline at end of file