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Fix upstream #3, bring in marcespie's G4 patch

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Fix a clang warning which is also a bug. Thanks to @marcespie for the
patch.

Fixes upstream issue #3
This commit is contained in:
Phil Pemberton
2020-05-26 18:13:27 +01:00
parent 986047af9b
commit ff881377d8
1 changed files with 2 additions and 1 deletions
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3
bitblt_g4.c
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@@ -215,6 +215,7 @@ static uint32_t g4_find_pixel (uint8_t *buf,
return (width); return (width);
} }
#define absdiff(a, b) ((a) < (b) ? (b)-(a) : (a) - (b))
static void g4_encode_row (struct bit_buffer *buf, static void g4_encode_row (struct bit_buffer *buf,
uint32_t width, uint32_t width,
@@ -253,7 +254,7 @@ static void g4_encode_row (struct bit_buffer *buf,
fprintf (stderr, "pass\n"); fprintf (stderr, "pass\n");
#endif #endif
} }
else if (abs (a1 - b1) <= 3) else if (absdiff(a1, b1) <= 3)
{ {
/* vertical mode */ /* vertical mode */
write_bits (buf, write_bits (buf,