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eeshow/gfx/diff.c (complement_box): determine limits outside the loops
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@ -253,15 +253,22 @@ static void differences(struct diff *diff, uint32_t *a, const uint32_t *b)
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static void complement_box(struct diff *diff, uint32_t *a,
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int xa, int ya, int xb, int yb, uint32_t color)
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{
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int sx, sy, ex, ey;
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uint32_t *p;
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int x, y;
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for (y = ya; y != yb; y++) {
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if (y < 0 || y >= diff->h)
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continue;
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sx = xa > 0 ? xa : 0;
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ex = xb < diff->w ? xb : diff->w;
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sy = ya > 0 ? ya : 0;
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ey = yb < diff->h ? yb : diff->h;
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if (sx >= ex || sy >= ey)
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return;
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for (y = sy; y != ey; y++) {
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p = a + y * (diff->stride >> 2);
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for (x = xa; x != xb; x++)
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if (x >= 0 && x < diff->w && (p[x] & MASK) == MASK)
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for (x = sx; x != ex; x++)
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if ((p[x] & MASK) == MASK)
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p[x] = color;
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}
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}
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