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test/simple: Tighten sanity checks in reference image generator

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-10-02 00:20:52 +01:00
parent 50b41e2145
commit 79c8b14b9f
1 changed files with 4 additions and 4 deletions
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8
test/simple.c
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@ -54,8 +54,6 @@ static int pfrac (int v)
return v & ((1 << CAIRO_FIXED_FRAC_BITS) - 1);
}
#define BIAS 1024
static void add_edge (struct coverage *coverage,
int x1, int y1, int x2, int y2,
int sign)
@ -98,9 +96,11 @@ static void add_edge (struct coverage *coverage,
int x = xq + (xr >= dy/2);
if (x < 256*coverage->width) {
int i = pfloor (y) * coverage->width + pfloor (x);
if (x > 0)
int i = pfloor (y) * coverage->width;
if (x > 0) {
i += pfloor (x);
coverage->cells[i].uncovered_area += sign * pfrac(x);
}
coverage->cells[i].covered_height += sign;
}