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eeshow/gfx/diff.c (complement_box): determine limits outside the loops

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This commit is contained in:
Werner Almesberger 2016-08-20 15:54:32 -03:00
parent 3b76b058fd
commit ff47d69d25
1 changed files with 12 additions and 5 deletions
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17
eeshow/gfx/diff.c
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@ -253,15 +253,22 @@ static void differences(struct diff *diff, uint32_t *a, const uint32_t *b)
static void complement_box(struct diff *diff, uint32_t *a, static void complement_box(struct diff *diff, uint32_t *a,
int xa, int ya, int xb, int yb, uint32_t color) int xa, int ya, int xb, int yb, uint32_t color)
{ {
int sx, sy, ex, ey;
uint32_t *p; uint32_t *p;
int x, y; int x, y;
for (y = ya; y != yb; y++) { sx = xa > 0 ? xa : 0;
if (y < 0 || y >= diff->h) ex = xb < diff->w ? xb : diff->w;
continue; sy = ya > 0 ? ya : 0;
ey = yb < diff->h ? yb : diff->h;
if (sx >= ex || sy >= ey)
return;
for (y = sy; y != ey; y++) {
p = a + y * (diff->stride >> 2); p = a + y * (diff->stride >> 2);
for (x = xa; x != xb; x++) for (x = sx; x != ex; x++)
if (x >= 0 && x < diff->w && (p[x] & MASK) == MASK) if ((p[x] & MASK) == MASK)
p[x] = color; p[x] = color;
} }
} }