Sha256: 038710afb69eeb7d6381b748de3d4c44f1d5df8a0ba6ca1241f08bb65e232f96
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Contents
require 'stringio'
# Extension to boost performance of ChunkyPNG
module ChunkyPNG
class Canvas
def crop(x, y, crop_width, crop_height)
raise ChunkyPNG::OutOfBounds, "Image width is too small!" if crop_width + x > width
raise ChunkyPNG::OutOfBounds, "Image width is too small!" if crop_height + y > height
new_pixels = Array.new(crop_width * crop_height)
for cy in 0...crop_height do
new_pixels[cy*crop_width, crop_width] = pixels.slice((cy + y) * width + x, crop_width)
end
ChunkyPNG::Canvas.new(crop_width, crop_height, new_pixels)
end
end
end
Version data entries
45 entries across 45 versions & 1 rubygems