Scaling contest

[Michael Thaler]

On Thursday 30 June 2005 23:15, Michael Thaler wrote:

Two more remarks: should we rename the Filter filter to linear filter in the 
dialog? Because I think that is what it is?

Also, the code from the Graphic Gems book on which my code is based has some 
improvements over the straight-forward version presented in the book:

		- Horizontal filter contributions are calculated on the fly,
		  as each column is mapped from src to dst image. This lets 
		  us omit having to allocate a temporary full horizontal stretch 
		  of the src image.

		- If none of the src pixels within a sampling region differ, 
		  then the output pixel is forced to equal (any of) the source pixel.
		  This ensures that filters do not corrupt areas of constant color.

		- Filter weight contribution results, after summing, are 
		  rounded to the nearest pixel color value instead of 
		  being casted to Pixel (usually an int or char). Otherwise, 
		  artifacting occurs. 

Michael