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fb_generic: add swidth variable, "stride in fb_pixel_t units"

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this should allow to use fb_pixel_t pointer arithmetics more often
instead of byte pointers
This commit is contained in:
Stefan Seyfried
2017-02-15 20:30:52 +01:00
committed by M. Liebmann
parent b7110faaf6
commit 7c7d5f08dd
8 changed files with 12 additions and 9 deletions
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3
src/driver/fb_accel_cs_hd2.cpp
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@@ -216,6 +216,7 @@ int CFbAccelCSHD2::setMode(unsigned int, unsigned int, unsigned int)
return -1;
}
stride = _fix.line_length;
swidth = stride / sizeof(fb_pixel_t);
if (ioctl(fd, FBIOBLANK, FB_BLANK_UNBLANK) < 0)
printf("screen unblanking failed\n");
xRes = screeninfo.xres;
@@ -225,7 +226,7 @@ int CFbAccelCSHD2::setMode(unsigned int, unsigned int, unsigned int)
int needmem = stride * yRes * 2;
if (available >= needmem)
{
backbuffer = lfb + stride / sizeof(fb_pixel_t) * yRes;
backbuffer = lfb + swidth * yRes;
return 0;
}
fprintf(stderr, LOGTAG "not enough FB memory (have %d, need %d)\n", available, needmem);