svg command can now specify an ID

lib/squib/api/image.rb

@@ -27,10 +27,10 @@ module Squib
     # @param width: the pixel width that the image should scale to. SVG scaling is done with vectors, so the scaling should be smooth. When set to `:native`, uses the DPI and units of the loaded SVG document.
     # @param height: the pixel width that the image should scale to. SVG scaling is done with vectors, so the scaling should be smooth. When set to `:native`, uses the DPI and units of the loaded SVG document.
     # @api public
-    def svg(range: :all, file: nil, x: 0, y: 0, width: :native, height: :native)
+    def svg(range: :all, file: nil, id: nil, x: 0, y: 0, width: :native, height: :native)
       range = rangeify(range)
       file = fileify(file)
-      range.each{ |i| @cards[i].svg(file, x, y, width, height) }
+      range.each{ |i| @cards[i].svg(file, id, x, y, width, height) }
     end
 
   end

lib/squib/graphics/image.rb

@@ -8,14 +8,14 @@ module Squib
       cc.paint(alpha)
     end
 
-    def svg(file, x, y, width, height)
+    def svg(file, id, x, y, width, height)
       svg = RSVG::Handle.new_from_file(file)
       width = svg.width if width == :native
       height = svg.height if height == :native
       tmp = Cairo::ImageSurface.new(width, height)
       tmp_cc = Cairo::Context.new(tmp)
       tmp_cc.scale(width.to_f / svg.width.to_f, height.to_f / svg.height.to_f)
-      tmp_cc.render_rsvg_handle(svg)
+      tmp_cc.render_rsvg_handle(svg, id)
       cairo_context.set_source(tmp, x, y)
       cairo_context.paint
     end