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/* RCSid $Id: falsecolor.h,v 3.2 2005/11/15 06:52:38 greg Exp $ */
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/*
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* Header file for false color tone-mapping.
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*
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* Include after "color.h" and "tonemap.h"
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*/
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#ifndef _RAD_FALSECOLOR_H_
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#define _RAD_FALSECOLOR_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* false color mapping data structure */
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typedef struct {
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TMbright mbrmin, mbrmax; /* mapped min. & max. brightnesses */
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BYTE *lumap; /* false color luminance map */
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BYTE (*scale)[3]; /* false color ordinal scale */
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} FCstruct;
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extern BYTE fcDefaultScale[256][3]; /* default false color scale */
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extern FCstruct *
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fcInit(BYTE fcscale[256][3]);
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/*
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Allocate and initialize false color mapping data structure.
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fcscale - false color ordinal scale.
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returns - new false color mapping pointer, or NULL if no memory.
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*/
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extern int
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fcFixedLinear(FCstruct *fcs, double Lwmax);
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/*
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Assign fixed linear false color map.
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fcs - false color structure pointer.
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Lwmax - maximum luminance for scaling
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returns - 0 on success, TM_E_* on failure.
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*/
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extern int
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fcFixedLog(FCstruct *fcs, double Lwmin, double Lwmax);
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/*
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Assign fixed logarithmic false color map.
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fcs - false color structure pointer.
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Lwmin - minimum luminance for scaling
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Lwmax - maximum luminance for scaling
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returns - 0 on success, TM_E_* on failure.
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*/
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extern int
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fcLinearMapping(FCstruct *fcs, TMstruct *tms, double pctile);
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/*
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Compute linear false color map.
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fcs - false color structure pointer.
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tms - tone mapping structure pointer, with histogram.
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pctile - percentile to ignore on top
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returns - 0 on success, TM_E_* on failure.
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*/
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extern int
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fcLogMapping(FCstruct *fcs, TMstruct *tms, double pctile);
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/*
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Compute logarithmic false color map.
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fcs - false color structure pointer.
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tms - tone mapping structure pointer, with histogram.
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pctile - percentile to ignore on top and bottom
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returns - 0 on success, TM_E_* on failure.
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*/
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extern int
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fcMapPixels(FCstruct *fcs, BYTE *ps, TMbright *ls, int len);
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/*
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Apply false color mapping to pixel values.
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fcs - false color structure pointer.
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ps - returned RGB pixel values.
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ls - encoded luminance values.
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len - number of pixels.
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returns - 0 on success, TM_E_* on failure.
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*/
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extern int
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fcIsLogMap(FCstruct *fcs);
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/*
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Determine if false color mapping is logarithmic.
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fcs - false color structure pointer.
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returns - 1 if map follows logarithmic mapping, -1 on error.
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*/
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extern FCstruct *
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fcDup(FCstruct *fcs);
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/*
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Duplicate a false color structure.
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fcs - false color structure pointer.
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returns - duplicate structure, or NULL if no memory.
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*/
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extern void
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fcDone(FCstruct *fcs);
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/*
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Free data associated with the given false color mapping structure.
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fcs - false color mapping structure to free.
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_FALSECOLOR_H_ */
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