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Improve performance of blind-stack - blind - suckless command-line video editin… |
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git clone git://git.suckless.org/blind |
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commit b384c0cc8c69783495e1f21f3fd0f3e6253645b1 |
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parent 8a2f7656c100fe9062782977ec5c82212d092ab9 |
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Author: Mattias Andrée <[email protected]> |
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Date: Fri, 14 Jul 2017 00:44:45 +0200 |
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Improve performance of blind-stack |
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Signed-off-by: Mattias Andrée <[email protected]> |
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Diffstat: |
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M src/blind-stack.c | 9 +++++---- |
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1 file changed, 5 insertions(+), 4 deletions(-) |
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--- |
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diff --git a/src/blind-stack.c b/src/blind-stack.c |
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@@ -20,10 +20,11 @@ USAGE("[-bs] bottom-stream ... top-stream") |
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a2 = ((TYPE *)(streams[j].buf + i))[3];\ |
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if (BLEND)\ |
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a2 /= (TYPE)(j + 1);\ |
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- x1 = x1 * a1 * (1 - a2) + x2 * a2;\ |
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- y1 = y1 * a1 * (1 - a2) + y2 * a2;\ |
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- z1 = z1 * a1 * (1 - a2) + z2 * a2;\ |
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- a1 = a1 * (1 - a2) + a2;\ |
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+ a1 *= 1 - a2;\ |
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+ x1 = x1 * a1 + x2 * a2;\ |
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+ y1 = y1 * a1 + y2 * a2;\ |
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+ z1 = z1 * a1 + z2 * a2;\ |
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+ a1 += a2;\ |
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}\ |
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((TYPE *)(streams[0].buf + i))[0] = x1;\ |
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((TYPE *)(streams[0].buf + i))[1] = y1;\ |
