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/* Copyright (c) 1997 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* RCSid: $Id$ */ |
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/* |
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* color.h - header for routines using pixel color values. |
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* |
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* 12/31/85 |
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* Must be included after X11 headers, since they declare a BYTE type. |
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* |
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* Two color representations are used, one for calculation and |
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* another for storage. Calculation is done with three floats |
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* three single byte mantissas and a common exponent. |
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*/ |
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define RED 0 |
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#define GRN 1 |
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#define BLU 2 |
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#define COLXS 128 /* excess used for exponent */ |
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#define WHT 3 /* used for RGBPRIMS type */ |
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typedef unsigned char BYTE; /* 8-bit unsigned integer */ |
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#undef BYTE |
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#define BYTE unsigned char /* 8-bit unsigned integer */ |
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typedef BYTE COLR[4]; /* red, green, blue (or X,Y,Z), exponent */ |
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#define CIE_y_w 0.3333 |
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#endif |
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#define STDPRIMS {CIE_x_r,CIE_y_r,CIE_x_g,CIE_y_g, \ |
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CIE_x_b,CIE_y_b,CIE_x_w,CIE_y_w} |
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#define STDPRIMS {{CIE_x_r,CIE_y_r},{CIE_x_g,CIE_y_g}, \ |
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{CIE_x_b,CIE_y_b},{CIE_x_w,CIE_y_w}} |
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#define CIE_D ( CIE_x_r*(CIE_y_g - CIE_y_b) + \ |
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CIE_x_g*(CIE_y_b - CIE_y_r) + \ |
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#define fputcolcor(cc,fp) fprintf(fp,"%s %f %f %f\n",COLCORSTR, \ |
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(cc)[RED],(cc)[GRN],(cc)[BLU]) |
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#ifdef DCL_ATOF |
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extern double atof(), ldexp(), frexp(); |
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#endif |
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/* |
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* Conversions to and from XYZ space generally don't apply WHTEFFICACY. |
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* If you need Y to be luminance (cd/m^2), this must be applied when |
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* converting from radiance (watts/sr/m^2). |
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*/ |
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extern RGBPRIMS stdprims; /* standard primary chromaticities */ |
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extern COLORMAT rgb2xyzmat; /* RGB to XYZ conversion matrix */ |
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extern COLORMAT xyz2rgbmat; /* XYZ to RGB conversion matrix */ |
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extern RGBPRIMS stdprims; /* standard primary chromaticities */ |
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extern COLORMAT rgb2xyzmat; /* RGB to XYZ conversion matrix */ |
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extern COLORMAT xyz2rgbmat; /* XYZ to RGB conversion matrix */ |
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extern COLOR cblack, cwhite; /* black (0,0,0) and white (1,1,1) */ |
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#define cie_rgb(rgb,xyz) colortrans(rgb,xyz2rgbmat,xyz,1) |
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#define rgb_cie(xyz,rgb) colortrans(xyz,rgb2xyzmat,rgb,1) |
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#define CGAMUT_LOWER 01 |
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#define CGAMUT_UPPER 02 |
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#define CGAMUT (CGAMUT_LOWER|CGAMUT_UPPER) |
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#define rgb_cie(xyz,rgb) colortrans(xyz,rgb2xyzmat,rgb) |
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|
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#ifdef BSD |
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#define cpcolormat(md,ms) bcopy((char *)ms,(char *)md,sizeof(COLORMAT)) |
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#else |
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extern char *memcpy(); |
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#define cpcolormat(md,ms) (void)memcpy((char *)md,(char *)ms,sizeof(COLORMAT)) |
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#define cpcolormat(md,ms) memcpy((char *)md,(char *)ms,sizeof(COLORMAT)) |
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#endif |
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|
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#ifdef NOPROTO |
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/* defined in color.c */ |
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extern char *tempbuffer(); |
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extern int fwritecolrs(); |
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extern int freadcolrs(); |
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extern int fwritescan(); |
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extern int freadscan(); |
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extern void setcolr(); |
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extern void colr_color(); |
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extern int bigdiff(); |
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/* defined in spec_rgb.c */ |
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extern void spec_rgb(); |
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extern void spec_cie(); |
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extern void cie_rgb(); |
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extern int clipgamut(); |
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extern void colortrans(); |
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extern void multcolormat(); |
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extern void compxyz2rgbmat(); |
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extern void comprgb2xyzmat(); |
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extern void comprgb2rgbmat(); |
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extern void compxyzWBmat(); |
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extern void compxyz2rgbWBmat(); |
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extern void comprgb2xyzWBmat(); |
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extern void comprgb2rgbWBmat(); |
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/* defined in colrops.c */ |
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extern int setcolrcor(); |
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extern int setcolrinv(); |
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extern int setcolrgam(); |
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extern int colrs_gambs(); |
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extern int gambs_colrs(); |
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extern void shiftcolrs(); |
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extern void normcolrs(); |
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|
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#else |
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/* defined in color.c */ |
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extern char *tempbuffer(unsigned int len); |
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extern int fwritecolrs(COLR *scanline, int len, FILE *fp); |
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extern int freadcolrs(COLR *scanline, int len, FILE *fp); |
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extern int fwritescan(COLOR *scanline, int len, FILE *fp); |
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extern int freadscan(COLOR *scanline, int len, FILE *fp); |
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extern void setcolr(COLR clr, double r, double g, double b); |
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extern void colr_color(COLOR col, COLR clr); |
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extern int bigdiff(COLOR c1, COLOR c2, double md); |
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/* defined in spec_rgb.c */ |
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extern void spec_rgb(COLOR col, int s, int e); |
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extern void spec_cie(COLOR col, int s, int e); |
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extern void cie_rgb(COLOR rgb, COLOR xyz); |
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extern int clipgamut(COLOR col, double brt, int gamut, |
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COLOR lower, COLOR upper); |
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extern void colortrans(COLOR c2, COLORMAT mat, COLOR c1); |
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extern void multcolormat(COLORMAT m3, COLORMAT m2, |
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COLORMAT m1); |
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extern void compxyz2rgbmat(COLORMAT mat, RGBPRIMS pr); |
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extern void comprgb2xyzmat(COLORMAT mat, RGBPRIMS pr); |
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extern void comprgb2rgbmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
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extern void compxyzWBmat(COLORMAT mat, float wht1[2], |
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float wht2[2]); |
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extern void compxyz2rgbWBmat(COLORMAT mat, RGBPRIMS pr); |
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extern void comprgb2xyzWBmat(COLORMAT mat, RGBPRIMS pr); |
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extern void comprgb2rgbWBmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
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/* defined in colrops.c */ |
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extern int setcolrcor(double (*f)(), double a2); |
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extern int setcolrinv(double (*f)(), double a2); |
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extern int setcolrgam(double g); |
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extern int colrs_gambs(COLR *scan, int len); |
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extern int gambs_colrs(COLR *scan, int len); |
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extern void shiftcolrs(COLR *scan, int len, int adjust); |
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extern void normcolrs(COLR *scan, int len, int adjust); |
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#endif |
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#ifdef __cplusplus |
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} |
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#endif |
