showcase: trim_radius still defaults to 38px

docs reflect that now too

lib/squib/args/showcase_special.rb

@@ -11,7 +11,10 @@ module Squib
       include DirValidator
 
       def self.parameters
-        { scale: 0.85,
+        {
+          scale: 0.85,
+          trim: 0,
+          trim_radius: 38,
           offset: 1.1,
           reflect_offset: 15,
           reflect_percent: 0.25,

lib/squib/graphics/showcase.rb

@@ -21,7 +21,7 @@ module Squib
 
       cards = range.collect { |i| @cards[i] }
       cards.each_with_index do |card, i|
-        trimmed = trim_rounded(card.cairo_surface, sheet.trim, sheet.trim_radius)
+        trimmed = trim_rounded(card.cairo_surface, showcase.trim, showcase.trim_radius)
         reflected = reflect(trimmed, showcase.reflect_offset, showcase.reflect_percent, showcase.reflect_strength)
         perspectived = perspective(reflected, showcase.scale, showcase.face_right?)
         out_cc.set_source(perspectived, sheet.margin + i * perspectived.width * showcase.offset, sheet.margin)