Aire-One
/
awesome
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

image: fix conversion on different endianness (FS#504) 

Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Julien Danjou 2009-04-27 12:09:04 +02:00
parent b780be7578
commit 14b090e566
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
image.c
View File

@ -100,12 +100,21 @@ image_compute(image_t *image)
for(i = 0; i < size; i++, dataimg += 4)
{
#if AWESOME_IS_BIG_ENDIAN
dataimg[0] = (data[i] >> 24) & 0xff; /* A */
/* cairo wants pre-multiplied alpha */
alpha = dataimg[0] / 255.0;
dataimg[1] = ((data[i] >> 16) & 0xff) * alpha; /* R */
dataimg[2] = ((data[i] >> 8) & 0xff) * alpha; /* G */
dataimg[3] = (data[i] & 0xff) * alpha; /* B */
#else
dataimg[3] = (data[i] >> 24) & 0xff; /* A */
/* cairo wants pre-multiplied alpha */
alpha = dataimg[3] / 255.0;
dataimg[2] = ((data[i] >> 16) & 0xff) * alpha; /* R */
dataimg[1] = ((data[i] >> 8) & 0xff) * alpha; /* G */
dataimg[0] = (data[i] & 0xff) * alpha; /* B */
#endif
}
}