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Fix PNG bitdepth

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This commit is contained in:
DarthSim 2021-03-31 12:41:00 +06:00
parent 7e4ae9d0ce
commit aa6edd13f6
2 changed files with 5 additions and 3 deletions
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6
vips.c
View File

@ -1,6 +1,5 @@
#include "vips.h"
#include <string.h>
#include <math.h>
#define VIPS_SUPPORT_SMARTCROP \
(VIPS_MAJOR_VERSION > 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION >= 5))
@ -654,7 +653,10 @@ vips_pngsave_go(VipsImage *in, void **buf, size_t *len, int interlace, int quant
NULL
);
int bitdepth = ceil(log2(colors));
int bitdepth = 1;
if (colors > 16) bitdepth = 8;
else if (colors > 4) bitdepth = 4;
else if (colors > 2) bitdepth = 2;
return vips_pngsave_buffer(
in, buf, len,

2
vips.go
View File

@ -2,7 +2,7 @@ package main
/*
#cgo pkg-config: vips
#cgo LDFLAGS: -s -w -lm
#cgo LDFLAGS: -s -w
#cgo CFLAGS: -O3
#include "vips.h"
*/