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Fix pixel error rounding in gdispDrawConvexPoly().

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The corrects strange gwin arrow button appearances for certain sizes.
This commit is contained in:
inmarket 2015-02-14 10:38:24 +10:00
parent 7c7459f1d2
commit 39459872b2
1 changed files with 7 additions and 0 deletions
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7
src/gdisp/gdisp.c
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@ -2829,6 +2829,11 @@ void gdispGDrawBox(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, co
lk = (FIXED(lpnt->x) - lx) / (lpnt->y - y);
rk = (FIXED(rpnt->x) - rx) / (rpnt->y - y);
// Add error correction for rounding
lx += FIXED0_5;
rx += FIXED0_5;
// Do all the line segments
MUTEX_ENTER(g);
g->p.color = color;
while(1) {
@ -2873,6 +2878,7 @@ void gdispGDrawBox(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, co
lpnt = lpnt <= pntarray ? epnts : lpnt-1;
}
lk = (FIXED(lpnt->x) - lx) / (lpnt->y - y);
lx += FIXED0_5;
} else {
for (rpnt = rpnt >= epnts ? pntarray : rpnt+1; rpnt->y == y; cnt--) {
if (!cnt) {
@ -2884,6 +2890,7 @@ void gdispGDrawBox(GDisplay *g, coord_t x, coord_t y, coord_t cx, coord_t cy, co
rpnt = rpnt >= epnts ? pntarray : rpnt+1;
}
rk = (FIXED(rpnt->x) - rx) / (rpnt->y - y);
rx += FIXED0_5;
}
}
}