get_pixels.rb in rmagick-2.14.0

- old
+ new

@@ -1,7 +1,7 @@
-#! /usr/local/bin/ruby -w
-require 'RMagick'
+#!/usr/bin/env ruby -w
+require 'rmagick'
 
 # Demonstrate partial transparency and the get_pixels and
 # store_pixels methods by creating an image that goes from
 # full-color on the left to monochrome on the right.
 
@@ -21,28 +21,27 @@
 # elements as there are columns in the image. The first
 # element should be TransparentOpacity and each succeeding
 # element slightly more opaque than its predecessor.
 step = Magick::TransparentOpacity / cols.to_f
 opacity_steps = Array.new(cols)
-cols.times { |x|
-    opacity_steps[x] = Magick::TransparentOpacity - Integer(x * step)
-    if opacity_steps[x] < Magick::OpaqueOpacity
-        opacity_steps[x] = Magick::OpaqueOpacity
-    end
-}
+cols.times do |x|
+  opacity_steps[x] = Magick::TransparentOpacity - Integer(x * step)
+  if opacity_steps[x] < Magick::OpaqueOpacity
+    opacity_steps[x] = Magick::OpaqueOpacity
+  end
+end
 
 # Get each row of pixels from the mono image.
 # Copy the pre-computed opacity values to the pixels.
 # Store the pixels back.
-rows.times { |y|
-    pixels = grayrocks.get_pixels(0, y, cols, 1)
-    pixels.each_with_index { |p,x| p.opacity = opacity_steps[x] }
-    grayrocks.store_pixels(0, y, cols, 1, pixels)
-}
+rows.times do |y|
+  pixels = grayrocks.get_pixels(0, y, cols, 1)
+  pixels.each_with_index { |p,x| p.opacity = opacity_steps[x] }
+  grayrocks.store_pixels(0, y, cols, 1, pixels)
+end
 
 # Composite the mono version of the image over the color version.
 grayrocks.matte = true
 combine = rocks.composite(grayrocks, Magick::CenterGravity, Magick::OverCompositeOp)
 #combine.display
 combine.write 'get_pixels.jpg'
 exit
-