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tif.c: fix endianness detection, props Schaich Alonso

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gitlost 2021-03-23 15:37:18 +00:00
parent 6dc8a242df
commit 89518c4f01
1 changed files with 9 additions and 12 deletions
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21
backend/tif.c
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@ -45,13 +45,6 @@
#include <malloc.h>
#endif
#if !defined(_WIN32) && !defined(__APPLE__)
#include <endian.h>
# if __BYTE_ORDER == __BIG_ENDIAN
#define TIF_BIG_ENDIAN
#endif
#endif
/* PhotometricInterpretation */
#define TIF_PMI_WHITEISZERO 0
#define TIF_PMI_BLACKISZERO 1
@ -85,6 +78,10 @@ static void to_cmyk(unsigned char rgb[3], unsigned char alpha, unsigned char *cm
}
static int is_big_endian() {
return (*((const uint16_t *)"\x11\x22") == 0x1122);
}
INTERNAL int tif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf) {
unsigned char fg[4], bg[4];
int i;
@ -351,11 +348,11 @@ INTERNAL int tif_pixel_plot(struct zint_symbol *symbol, unsigned char *pixelbuf)
}
/* Header */
#ifdef TIF_BIG_ENDIAN
header.byte_order = 0x4D4D; // "MM" big-endian
#else
header.byte_order = 0x4949; // "II" little-endian
#endif
if (is_big_endian()) {
header.byte_order = 0x4D4D; // "MM" big-endian
} else {
header.byte_order = 0x4949; // "II" little-endian
}
header.identity = 42;
header.offset = free_memory;