| Subject: | allow the same matrix to be used for different source/destination channel counts in convert() |
Currently you need different matrix dimensions for each combination of
input and output channel counts. This is too much hard work.
Optionally, allow a 4 x 5 matrix to always be specified, and adapt that
to optimize the output.
eg. if the red/green/blue rows are the same, produce a grey output
if the alpha channel has 1 in the last column, produce an image with no
alpha channel
if the source has no alpha, and the alpha row only has 1 in the identity
position, produce an image with no alpha channel
Don't use the flash 0-255 convention in the URL below.
http://www.adobe.com/devnet/flash/articles/matrix_transformations_04.html