enthought/chaco — pull request #123 by corranwebster (2013-05-20 21:16:59+00:00)
Title: Fast and lazy colour maps

Implement fast-tracked rgb24 and rgb32 mappers for colour maps to allow fast and memory-efficient colourmapped plots.

Allow cmap_image_plot instances to specify that they don't want to cache the full colormapped image, and instead pass a mapper to the underlying renderer that maps only the visible region, which may result in a speedup in some large data situations.