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Fix rounding error on RGB to L conversion

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Alexander 2019-12-31 03:35:47 +03:00
parent 302b86591e
commit d68147ce89
1 changed files with 2 additions and 1 deletions
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src/libImaging/Convert.c
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@ -44,7 +44,8 @@
#define L(rgb)\ #define L(rgb)\
((INT32) (rgb)[0]*299 + (INT32) (rgb)[1]*587 + (INT32) (rgb)[2]*114) ((INT32) (rgb)[0]*299 + (INT32) (rgb)[1]*587 + (INT32) (rgb)[2]*114)
#define L24(rgb)\ #define L24(rgb)\
((rgb)[0]*19595 + (rgb)[1]*38470 + (rgb)[2]*7471) ((rgb)[0]*19595 + (rgb)[1]*38470 + (rgb)[2]*7471 + 0x8000)
#ifndef round #ifndef round
double round(double x) { double round(double x) {