Replaced inline copyright notice with #include "copyright.h"
Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
took "color.h" include out of tonemap.h and put in tmprivat.h changed routines so zero-length arrays don't return error
got rid of unused variable
changed behavior so that tmClearHisto() and tmAddHisto() do not void computed tone mapping, even if brightness limits are exceeded
added tmLastError and tmLastFunction globals (set by tmErrorReturn)
added notion of conversion packages with private data
minor bug fixes and added tmDup()
changed TM_F_NOERRS to TM_F_NOSTDERR skipped histogram clipping for TM_F_LINEAR in tmComputeMapping()
Initial revision
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