Contents

require 'spec_helper'

describe ChunkyPNG::Canvas::Resampling do

  subject { reference_canvas('clock') } 

  describe '#resample_nearest_neighbor' do
    
    it "should downscale from 2x2 to 1x1 correctly" do
      canvas = ChunkyPNG::Canvas.new(2, 2, [1, 2, 3, 4])
      canvas.resample_nearest_neighbor(1, 1).should == ChunkyPNG::Canvas.new(1, 1, [1])
    end
    
    it "should downscale from 2x2 to 4x4 correctly" do
      canvas = ChunkyPNG::Canvas.new(2, 2, [1, 2, 3, 4])
      canvas.resample_nearest_neighbor(4, 4).should == ChunkyPNG::Canvas.new(4, 4, [1,1,1,2,1,1,1,2,1,1,1,2,3,3,3,4])
    end
    
    it "should upscale both axis of the image" do
      subject.resample_nearest_neighbor(45, 45).should == reference_canvas('clock_nn_xup_yup')
    end
    
    it "should downscale both axis of the image" do
      subject.resample_nearest_neighbor(12, 12).should == reference_canvas('clock_nn_xdown_ydown')
    end
    
    it "should downscale the x-axis and upscale the y-axis of the image" do
      subject.resample_nearest_neighbor(20, 50).should == reference_canvas('clock_nn_xdown_yup')
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
chunky_png-1.0.0.rc1	spec/chunky_png/canvas/resampling_spec.rb