[PATCH 3/3] winex11: Use TINN algorithm to speed up colour lookups.

[Vitaly Budovski]

Make use of the Triangle Inequality Nearest Neighbour algorithm to find the
nearest colour more efficiently than a simple linear search. The improvements
are most noticeable with a palette of 256 colours. Testing shows approximately
3-4x performance increase for 256 colours.
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  dlls/winex11.drv/dib.c |  608 ++++++++++++++++++++++++++++++------------------
  1 files changed, 380 insertions(+), 228 deletions(-)
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