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Fix issue with EWA filtering in compositor which disabled alpha

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It was caused by wrong copy-paste thing, which replaced check
"whether alpha channel is enabled" with "whether alpha channel
is not zero" (which is always zero in accumulator).

Compositor always works with RGBA, so no need to do any special
checks here.

TODO: Maybe MapUV ode shall ignore alpha channel?
This commit is contained in:
Sergey Sharybin 2013-08-19 08:30:03 +00:00
parent 1dc19975c0
commit a14febc70a
1 changed files with 2 additions and 7 deletions
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9
source/blender/compositor/intern/COM_MemoryBuffer.cpp
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@ -335,8 +335,7 @@ void MemoryBuffer::readEWA(float result[4], float fx, float fy, float dx, float
float tc[4];
const float wt = EWA_WTS[(Q < 0.f) ? 0 : (unsigned int)Q];
read(tc, clipuv(u, width), clipuv(v, height));
madd_v3_v3fl(result, tc, wt);
result[3] += result[3] ? tc[3] * wt : 0.f;
madd_v4_v4fl(result, tc, wt);
d += wt;
}
Q += DQ;
@ -346,9 +345,5 @@ void MemoryBuffer::readEWA(float result[4], float fx, float fy, float dx, float
// d should hopefully never be zero anymore
d = 1.f / d;
result[0] *= d;
result[1] *= d;
result[2] *= d;
// clipping can be ignored if alpha used, texr->ta already includes filtered edge
result[3] = result[3] ? result[3] * d : 1.f;
mul_v4_fl(result, d);
}