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apps/examples/fb: Fix calculation of a mask value.

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This commit is contained in:
Gregory Nutt 2017-11-22 16:14:11 -06:00
parent 4091367401
commit 0205eeef52
1 changed files with 4 additions and 2 deletions
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6
examples/fb/fb_main.c
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@ -177,10 +177,12 @@ static void draw_rect1(FAR struct fb_state_s *state,
int y;
row = (FAR uint8_t *)state->fbmem + state->pinfo.stride * rect->pt1.y;
startx = (rect->pt1.x >> 3);
endx = (rect->pt2.x >> 3);
lmask = 0xff << (8 - (rect->pt1.x & 3));
rmask = 0xff >> (rect->pt2.x & 3);
lmask = 0xff << (8 - (rect->pt1.x & 7));
rmask = 0xff >> (rect->pt2.x & 7);
for (y = rect->pt1.y; y <= rect->pt2.y; y++)
{