---
frontend/scanimage.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/frontend/scanimage.c b/frontend/scanimage.c
index 77c2288..0925039 100644
--- a/frontend/scanimage.c
+++ b/frontend/scanimage.c
@@ -1529,6 +1529,19 @@ scan_it (FILE *ofp)
for(j = 0; j < parm.bytes_per_line; j++)
pngbuf[j] = ~pngbuf[j];
}
+ /* PNG is big-endian */
+ /* see:
https://www.w3.org/TR/2003/REC-PNG-20031110/#7Integers-and-byte-order */
+ if (parm.depth == 16)
+ {
+ int j;
+ for (j = 0; j < parm.bytes_per_line; j += 2)
+ {
+ SANE_Byte LSB;
+ LSB = pngbuf[j];
+ pngbuf[j] = pngbuf[j + 1];
+ pngbuf[j + 1] = LSB;
+ }
+ }
png_write_row(png_ptr, pngbuf);
i += parm.bytes_per_line - pngrow;
left -= parm.bytes_per_line - pngrow;
--
1.8.3.1
--
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