Windows 10 UWP quick-and-dirty scaled image asset generation with ImageMagick

scale_win10_uwp_assets.rb

## Instructions
# 1. Place this file (modified appropriately with your paths) in folder with images to be scaled.
# 2. Run this file with Ruby (e.g. "ruby scale_win10_uwp_assets.rb").

## Results
# Creates a folder named "compiled_images" with scaled images.

## Notes
# You should create appropriate versions of your assets for different uses (and their scales and/or targets).

## Code
convert_executable             = 'C:\Users\am\Downloads\ImageMagick-6.9.3-0-portable-Q16-x64\convert.exe' # use 'convert' if ImageMagick is in path

# Replace with names of your files
square_image_filename          = 'SquareImage.png'  # Should be at least 1200x1200 to avoid being enlarged
square_image_plated_filename   = 'SquareImagePlated.png' # Should be at least 256x256 to avoid being enlarged
square_image_unplated_filename = 'SquareImageUnplated.png' # Should be at least 256x256 to avoid being enlarged
rectangular_image_filename     = 'RectangularImage.png' # Should be at least 2480x1200 to avoid being enlarged

# Had separate images for 24x24 and 16x16 assets
square_image_plated24_filename   = 'SquareImagePlated24AndBelow.png' # Should be at least 24x24 to avoid being enlarged
square_image_unplated24_filename = 'SquareImageUnplated24AndBelow.png' # Should be at least 24x24 to avoid being enlarged

square_image_sizes = [
  # Square 71x71 logo
  284, # Scale 400
  142, # Scale 200
  71,  # Scale 100
  107, # Scale 150
  89,  # Scale 125

  # Square 150x150 logo
  600, # Scale 400
  300, # Scale 200
  150, # Scale 100
  225, # Scale 150
  188, # Scale 125

  # Square 310x310 logo
  1240, # Scale 400
  620,  # Scale 200
  310,  # Scale 100
  465,  # Scale 150
  388,  # Scale 125

  # Square 44x44 logo
  176, # Scale 400
  88,  # Scale 200
  44,  # Scale 100
  66,  # Scale 150
  55,  # Scale 125

  # Store logo:
  200, # Scale 400
  100, # Scale 200
  75,  # Scale 150
  63,  # Scale 125
  50,  # Scale 100

  # Badge logo
  96, # Scale 400
  48, # Scale 200
  36, # Scale 150
  30, # Scale 125
  # 24  # Scale 100
]

square_image_plated_sizes = [
  # Square 44x44 logo
  256, # Target size 256
  48  # Target size 48
  # 24,  # Target size 24
  # 16   # Target size 16
]

square_image_unplated_sizes = [
  # Square 44x44 logo
  256, # Unplated Target size 256
  48  # Unplated Target size 48
  # 24,  # Unplated Target size 24
  # 16   # Unplated Target size 16
]

rectangular_image_sizes = [
  # Wide 310x150 logo
  [1240, 600], # Scale 400
  [620, 300],  # Scale 200
  [310, 150],  # Scale 100
  [465, 225],  # Scale 150
  [388, 188],  # Scale 125

  # Wide 310x150 logo
  [2480, 1200], # Scale 400
  [1240, 600],  # Scale 200
  [930, 450],   # Scale 150
  [775, 375],   # Scale 125
  [620, 300]    # Scale 100
]

system('mkdir compiled_images')

square_image_sizes.each do |pixel_width|
  system("#{convert_executable} #{square_image_filename} -resize x#{pixel_width} compiled_images/#{square_image_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_width}.png")
end

square_image_plated_sizes.each do |pixel_width|
  system("#{convert_executable} #{square_image_plated_filename} -resize x#{pixel_width} compiled_images/#{square_image_plated_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_width}.png")
end

square_image_unplated_sizes.each do |pixel_width|
  system("#{convert_executable} #{square_image_unplated_filename} -resize x#{pixel_width} compiled_images/#{square_image_unplated_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_width}.png")
end

rectangular_image_sizes.each do |pixel_width, pixel_height|
  system("#{convert_executable} #{rectangular_image_filename} -resize #{pixel_width}x#{pixel_height}! compiled_images/#{rectangular_image_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_height}.png")
end

# Special code for sizes 24 pixels and below #

[24, 16].each do |pixel_width|
  system("#{convert_executable} #{square_image_plated24_filename} -resize x#{pixel_width} compiled_images/#{square_image_plated_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_width}.png")
end

[24, 16].each do |pixel_width|
  system("#{convert_executable} #{square_image_unplated24_filename} -resize x#{pixel_width} compiled_images/#{square_image_unplated_filename.gsub(/.png$/, '')}_#{pixel_width}x#{pixel_width}.png")
end