# | Line 128 | Line 128 | extern void adjveil(void); /* adjust veil image */ | |
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128 | #endif | |
129 | extern void acuscan(COLOR *scln, int y); /* get acuity-sampled scanline */ | |
130 | extern void addveil(COLOR *sl, int y); /* add veil to scanline */ | |
131 | < | extern int initacuity(void); /* initialize variable acuity sampling */ |
131 | > | extern void initacuity(void); /* initialize variable acuity sampling */ |
132 | extern double hacuity(double La); /* human acuity func. (cycles/deg.) */ | |
133 | ||
134 | #ifdef __cplusplus |
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