Need something similar to RenderingHints

[gpotts]

At site it appears for the ntm plugin it reads the last block to get the width height of the image. This can be slow. If the image is indexed then we could get away with calculating the width and height once and then any further opens could pass RenderingHints? that can override certain values so they don't have to be calculated again. We will need to work with others on the OSSIM team to come up with a proper design. We are currently thinking about adding a ossimRenderingHints to the open of an image handler that will be something like a keywordlist.

Approach:

- we now have refactored all chipping interfaces to go through the same image chain generation and all handlers are now allocated and opened via a loadState interface

Unit testing:

- Generate a wget or curl interface that chips an image with variation of paramters. - Use system diff to determine any differences if any - Use system file command to verify the format for png, gif, and jpeg chips.

[gpotts]

A number of files have been modified to add support for full loadstate capabilities. Because we now do not allocate the object directly but through keywordlists we needed to fix a few filters internally to support the new loads. This is now fixed and working nicely.