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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* SCCSid "$SunId$ SGI" */ |
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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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#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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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) |
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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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#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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#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 |
