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fb_generic: fix blit2FB for big endian processors

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Stefan Seyfried
2018-02-24 23:55:58 +01:00
committed by Thilo Graf
parent 7c3c4ab446
commit dae2539f9c
1 changed files with 8 additions and 0 deletions
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8
src/driver/fb_generic.cpp
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@@ -41,6 +41,7 @@
#include <sys/mman.h>
#include <memory.h>
#include <math.h>
#include <endian.h>
#include <linux/kd.h>
@@ -1698,7 +1699,14 @@ void CFrameBuffer::blit2FB(void *fbbuff, uint32_t width, uint32_t height, uint32
else {
uint8_t *in = (uint8_t *)(pixpos + xp);
uint8_t *out = (uint8_t *)d2;
#if __BYTE_ORDER == __LITTLE_ENDIAN
int a = in[3]; /* TODO: big/little endian */
#elif __BYTE_ORDER == __BIG_ENDIAN
int a = in[0];
out++; in++;
#else
#error neither big nor little endian???
#endif
*out = (*out + ((*in - *out) * a) / 256);
in++; out++;
*out = (*out + ((*in - *out) * a) / 256);