image.rb in squib-0.0.3

- old
+ new
@@ -1,28 +1,47 @@
-module Squib
-  class Card
-
-    # :nodoc:
-    # @api private 
-    def png(file, x, y, alpha)
-      cc = cairo_context
-      png = Cairo::ImageSurface.from_png(file)
-      cc.set_source(png, x, y)
-      cc.paint(alpha)
-    end
-
-    # :nodoc:
-    # @api private 
-    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, id)
-      cairo_context.set_source(tmp, x, y)
-      cairo_context.paint
-    end
-
-  end
-end
+module Squib
+
+  # Cache all pngs we've already loaded
+  # 
+  # :nodoc:
+  # @api private
+  def cache_load_image(file)
+    @img_cache ||= {}
+    @img_cache[file] || @img_cache[file] = Cairo::ImageSurface.from_png(file)
+  end
+  module_function :cache_load_image
+
+  class Card
+
+    # :nodoc:
+    # @api private 
+    def png(file, x, y, alpha, blend)
+      return if file.nil? or file.eql? ''
+      png = Squib.cache_load_image(file)
+      use_cairo do |cc|
+        cc.set_source(png, x, y)
+        cc.operator = blend unless blend == :none
+        cc.paint(alpha)
+      end
+    end
+
+    # :nodoc:
+    # @api private 
+    def svg(file, id, x, y, width, height, alpha, blend)
+      Squib.logger.debug {"Rendering: #{file}, #{id} #{x}, #{y}, #{width}, #{height}, #{alpha}, #{blend}"}
+      return if file.nil? or file.eql? ''
+      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, id)
+      use_cairo do |cc|
+        cc.set_source(tmp, x, y)
+        cc.operator = blend unless blend == :none
+        cc.paint(alpha)
+      end
+    end
+
+  end
+end