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#include <stdio.h> |
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#include <math.h> |
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#include "rtmisc.h" |
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#include "color.h" |
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extern char *bmalloc(); |
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#define MAXGSHIFT 31 /* maximum shift for gamma table */ |
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static BYTE *g_mant = NULL, *g_nexp = NULL; |
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static uby8 *g_mant = NULL, *g_nexp = NULL; |
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static BYTE (*g_bval)[256] = NULL; |
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static uby8 (*g_bval)[256] = NULL; |
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int |
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setcolrcor(f, a2) /* set brightness correction */ |
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double (*f)(); |
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double (*f)(double,double); |
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double a2; |
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{ |
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double mult; |
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register int i, j; |
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/* allocate tables */ |
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if (g_bval == NULL && (g_bval = |
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(BYTE (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) |
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(uby8 (*)[256])bmalloc((MAXGSHIFT+1)*256)) == NULL) |
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return(-1); |
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/* compute colr -> gamb mapping */ |
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mult = 1.0/256.0; |
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int |
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setcolrinv(f, a2) /* set inverse brightness correction */ |
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double (*f)(); |
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double (*f)(double,double); |
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double a2; |
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{ |
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double mult; |
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register int i, j; |
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/* allocate tables */ |
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if (g_mant == NULL && (g_mant = (BYTE *)bmalloc(256)) == NULL) |
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if (g_mant == NULL && (g_mant = (uby8 *)bmalloc(256)) == NULL) |
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return(-1); |
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if (g_nexp == NULL && (g_nexp = (BYTE *)bmalloc(256)) == NULL) |
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if (g_nexp == NULL && (g_nexp = (uby8 *)bmalloc(256)) == NULL) |
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return(-1); |
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/* compute gamb -> colr mapping */ |
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i = 0; |
