25 lines
708 B
Plaintext
25 lines
708 B
Plaintext
require('GD');
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var colors = Hash.new(
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white => [255, 255, 255],
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red => [255, 0, 0],
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green => [0, 255, 0],
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blue => [0, 0, 255],
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magenta => [255, 0, 255],
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yellow => [255, 255, 0],
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cyan => [0, 255, 255],
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black => [0, 0, 0],
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);
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var barwidth = 160/8;
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var image = %s'GD::Image'.new(160, 100);
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var start = 0;
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colors.values.each { |rgb|
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var paintcolor = image.colorAllocate(rgb...);
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image.filledRectangle(start * barwidth, 0, start*barwidth + barwidth - 1, 99, paintcolor);
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start++;
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};
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%f'colorbars.png'.open('>:raw').print(image.png);
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