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more tracing

This commit is contained in:
Amy Bowersox 2019-12-10 13:59:27 -07:00
parent 3821988610
commit 3b7f326768
1 changed files with 12 additions and 8 deletions
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20
src/devctxt.c
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@ -57,27 +57,31 @@ static BOOL line_clip(PINT32 output, INT32 x1, INT32 y1, INT32 x2, INT32 y2, INT
}
if (outcode1 & 0x8)
{
x1 += (x2 - x1) * ((ymin - y1) / (y2 - y1));
tmp = (x2 - x1) * ((ymin - y1) / (y2 - y1));
x1 += tmp;
y1 = ymin;
Log(LDEBUG, "clipped against top to point (%d, %d)", x1 >> 16, y1 >> 16);
Log(LDEBUG, "clipped against top to point (%d, %d), dx=%d", x1 >> 16, y1 >> 16, tmp >> 16);
}
else if (outcode1 & 0x4)
{
x1 += (x2 - x1) * ((ymax - y1) / (y2 - y1));
tmp = (x2 - x1) * ((ymax - y1) / (y2 - y1));
x1 += tmp;
y1 = ymax;
Log(LDEBUG, "clipped against bottom to point (%d, %d)", x1 >> 16, y1 >> 16);
Log(LDEBUG, "clipped against bottom to point (%d, %d), dx=%d", x1 >> 16, y1 >> 16, tmp >> 16);
}
else if (outcode1 & 0x2)
{
y1 -= (y2 - y1) * ((xmax - x1) / (x2 - x1));
tmp = (y2 - y1) * ((xmax - x1) / (x2 - x1));
y1 -= tmp;
x1 = xmax;
Log(LDEBUG, "clipped against right to point (%d, %d)", x1 >> 16, y1 >> 16);
Log(LDEBUG, "clipped against right to point (%d, %d), dy=%d", x1 >> 16, y1 >> 16, tmp >> 16);
}
else if (outcode1 & 0x1)
{
y1 -= (y2 - y1) * ((xmin - x1) / (x2 - x1));
tmp = (y2 - y1) * ((xmin - x1) / (x2 - x1));
y1 -= tmp;
x1 = xmin;
Log(LDEBUG, "clipped against left to point (%d, %d)", x1 >> 16, y1 >> 16);
Log(LDEBUG, "clipped against left to point (%d, %d), dy=%d", x1 >> 16, y1 >> 16, tmp >> 16);
}
}
Log(LDEBUG, "final line is from (%d, %d) to (%d, %d)", x1 >> 16, y1 >> 16, x2 >> 16, y2 >> 16);