More exploration spikes

* Playing with PDF support
* Added background
* Added rectangle
* Split save to save_pdf and save_images since PDFs are way different
* Working on text rendering (non-pango for now, but that'll change)

lib/squib/graphics/background.rb

@@ -0,0 +1,17 @@
+module Squib
+  module Graphics
+
+    class Background
+      def initialize(card, color)
+        @card=card; @color=color
+      end
+
+      def execute
+        cc = @card.cairo_context
+        cc.set_source_rgb(*@color)
+        cc.paint
+      end
+    end
+
+  end
+end

lib/squib/graphics/rectangle.rb

@@ -0,0 +1,21 @@
+module Squib
+  module Graphics
+
+    class Rectangle
+      
+      def initialize(card, x, y, width, height, x_radius, y_radius)
+        @card=card; @x=x; @y=y; @width=width; @height=height
+        @x_radius=x_radius; @y_radius=y_radius
+      end
+
+      def execute
+        cc = @card.cairo_context
+        cc.set_source_rgb(0.0,0.0,0.0)
+        cc.rounded_rectangle(@x, @y, @width, @height, @x_radius, @y_radius)
+        cc.stroke
+      end
+
+    end
+
+  end
+end

lib/squib/graphics/save_doc.rb

@@ -0,0 +1,27 @@
+module Squib
+  module Graphics
+  
+    class SaveDoc
+      def initialize(format)
+        @format = format
+      end
+
+      def execute
+        #paper is 8.5x11
+        # PDF points are 1/72 of an inch
+        width = 8.5 * 72
+        height = 11 * 72
+        cc = Cairo::Context.new(Cairo::PDFSurface.new('_img/deck.pdf', width, height))
+        x = 10
+        y = 10
+        Squib.the_deck.each_with_index do |card, i|
+          cc.move_to(x,y)
+          x += 825*i
+          cc.set_source(card.cairo_surface, 0, 300)
+          cc.paint
+        end
+      end
+    end
+
+  end
+end

lib/squib/graphics/save_images.rb

@@ -1,13 +1,12 @@
 module Squib
   module Graphics
 
-    class Save
+    class SaveImages
       def initialize(format)
         @format = format
       end
 
       def execute
-        puts "Here!"
         Squib.the_deck.each_with_index do |card, i|
           card.cairo_context.target.write_to_png("_img/img_#{i}.png")
         end

lib/squib/graphics/text.rb

@@ -14,7 +14,7 @@ module Squib
         cc.set_source_rgb(0.0,0.0,0.0)
         cc.select_font_face ("Helvetica");
         cc.set_font_size(36)
-        cc.move_to(@x,@y)
+        cc.move_to(@x,@y + cc.text_extents(@str.to_s).height)
         cc.show_text(@str.to_s)
       end
     end