save_images.rb in squib-0.19.0a

- old
+ new
@@ -1,91 +1,91 @@
-require_relative 'cairo_context_wrapper'
-
-module Squib
-  class Card
-
-    # :nodoc:
-    # @api private
-    def save_png(batch, shadow)
-      surface = if preprocess_save?(batch, shadow)
-                  w, h = compute_dimensions(batch.rotate, batch.trim)
-                  preprocessed_save(w, h, batch, shadow)
-                else
-                  @cairo_surface
-                end
-      write_png(surface, index, batch)
-    end
-
-    # :nodoc:
-    # @api private
-    def preprocess_save?(batch, shadow)
-      batch.rotate != false || batch.trim > 0 || !(shadow.shadow_radius.nil?)
-    end
-
-    def compute_dimensions(rotate, trim)
-      if rotate
-        [ @height - 2 * trim, @width - 2 * trim ]
-      else
-        [ @width - 2 * trim, @height - 2 * trim ]
-      end
-    end
-
-    def preprocessed_save(w, h, batch, shadow)
-      new_cc = Cairo::Context.new(Cairo::ImageSurface.new(w, h))
-      trim_radius = batch.trim_radius
-      if batch.rotate != false
-        new_cc.translate w * 0.5, h * 0.5
-        new_cc.rotate batch.angle
-        new_cc.translate h * -0.5, w * -0.5
-        new_cc.rounded_rectangle(0, 0, h, w, trim_radius, trim_radius)
-      else
-        new_cc.rounded_rectangle(0, 0, w, h, trim_radius, trim_radius)
-      end
-      new_cc.clip
-      new_cc.set_source(@cairo_surface, -batch.trim, -batch.trim)
-      new_cc.paint
-      new_cc.reset_clip
-      new_cc = drop_shadow(new_cc, shadow, batch) unless shadow.shadow_radius.nil?
-      return new_cc.target
-    end
-
-    # pseudo-blur behave weirdly with a radius of 0 - wrapping
-    def blur(cc, r, &block)
-      if r == 0
-        yield(block)
-      else
-        cc.pseudo_blur(r, &block)
-      end
-    end
-
-    def drop_shadow(cc, s, batch)
-      off_x = s.shadow_offset_x
-      off_y = s.shadow_offset_y
-      s_trim = s.shadow_trim
-      s_rad = s.shadow_radius
-      new_w = cc.target.width  + off_x + 3 * s_rad - (2 * s_trim)
-      new_h = cc.target.height + off_y + 3 * s_rad - (2 * s_trim)
-      new_cc = Squib::Graphics::CairoContextWrapper.new(
-        Cairo::Context.new(Cairo::ImageSurface.new(new_w, new_h)))
-      blur(new_cc, s_rad) do
-        # fill in with shadow color
-        new_cc.set_source_squibcolor s.shadow_color
-        new_cc.rectangle 0, 0, new_cc.target.width, new_cc.target.height
-        new_cc.fill
-        # then, paint but blend with :dest_in to get a shadow-shaped drawing
-        new_cc.set_source cc.target, s_rad + off_x, s_rad + off_y
-        new_cc.operator = :dest_in # see https://www.cairographics.org/operators/
-        new_cc.paint
-      end
-      new_cc.set_source cc.target, s_rad, s_rad
-      new_cc.operator = :over
-      new_cc.paint
-      return new_cc
-    end
-
-    def write_png(surface, i, b)
-      filename = "#{b.dir}/#{b.prefix}#{b.count_format % i}#{b.suffix}.png"
-      surface.write_to_png filename
-    end
-
-  end
-end
+require_relative 'cairo_context_wrapper'
+
+module Squib
+  class Card
+
+    # :nodoc:
+    # @api private
+    def save_png(batch, shadow)
+      surface = if preprocess_save?(batch, shadow)
+                  w, h = compute_dimensions(batch.rotate, batch.trim)
+                  preprocessed_save(w, h, batch, shadow)
+                else
+                  @cairo_surface
+                end
+      write_png(surface, index, batch)
+    end
+
+    # :nodoc:
+    # @api private
+    def preprocess_save?(batch, shadow)
+      batch.rotate != false || batch.trim > 0 || !(shadow.shadow_radius.nil?)
+    end
+
+    def compute_dimensions(rotate, trim)
+      if rotate
+        [ @height - 2 * trim, @width - 2 * trim ]
+      else
+        [ @width - 2 * trim, @height - 2 * trim ]
+      end
+    end
+
+    def preprocessed_save(w, h, batch, shadow)
+      new_cc = Cairo::Context.new(Cairo::ImageSurface.new(w, h))
+      trim_radius = batch.trim_radius
+      if batch.rotate != false
+        new_cc.translate w * 0.5, h * 0.5
+        new_cc.rotate batch.angle
+        new_cc.translate h * -0.5, w * -0.5
+        new_cc.rounded_rectangle(0, 0, h, w, trim_radius, trim_radius)
+      else
+        new_cc.rounded_rectangle(0, 0, w, h, trim_radius, trim_radius)
+      end
+      new_cc.clip
+      new_cc.set_source(@cairo_surface, -batch.trim, -batch.trim)
+      new_cc.paint
+      new_cc.reset_clip
+      new_cc = drop_shadow(new_cc, shadow, batch) unless shadow.shadow_radius.nil?
+      return new_cc.target
+    end
+
+    # pseudo-blur behave weirdly with a radius of 0 - wrapping
+    def blur(cc, r, &block)
+      if r == 0
+        yield(block)
+      else
+        cc.pseudo_blur(r, &block)
+      end
+    end
+
+    def drop_shadow(cc, s, batch)
+      off_x = s.shadow_offset_x
+      off_y = s.shadow_offset_y
+      s_trim = s.shadow_trim
+      s_rad = s.shadow_radius
+      new_w = cc.target.width  + off_x + 3 * s_rad - (2 * s_trim)
+      new_h = cc.target.height + off_y + 3 * s_rad - (2 * s_trim)
+      new_cc = Squib::Graphics::CairoContextWrapper.new(
+        Cairo::Context.new(Cairo::ImageSurface.new(new_w, new_h)))
+      blur(new_cc, s_rad) do
+        # fill in with shadow color
+        new_cc.set_source_squibcolor s.shadow_color
+        new_cc.rectangle 0, 0, new_cc.target.width, new_cc.target.height
+        new_cc.fill
+        # then, paint but blend with :dest_in to get a shadow-shaped drawing
+        new_cc.set_source cc.target, s_rad + off_x, s_rad + off_y
+        new_cc.operator = :dest_in # see https://www.cairographics.org/operators/
+        new_cc.paint
+      end
+      new_cc.set_source cc.target, s_rad, s_rad
+      new_cc.operator = :over
+      new_cc.paint
+      return new_cc
+    end
+
+    def write_png(surface, i, b)
+      filename = "#{b.dir}/#{b.prefix}#{b.count_format % i}#{b.suffix}.png"
+      surface.write_to_png filename
+    end
+
+  end
+end