trotzig/diffux — pull request #93 by trotzig (2014-04-04 21:47:31+00:00)
Title: Draw only one ChunkyPNG::Image in SnapshotComparer

As pointed out by @lencioni in issue #76, we are spending a lot of time
stitching together the individual images created by the different
`SnapshotComparisonImage`s. This commit changes the implementation of
these classes to reuse the same image canvas for all comparison images,
but use an x-offset to control where on the x-axis the individual images
will start to draw.