Commit: 7bb910cd4e97cfb39fd5b874d9d634b13e4cee51
Author: Sergey Sharybin
Date: Fri Oct 31 12:35:20 2014 +0100
Branches: master
https://developer.blender.org/rB7bb910cd4e97cfb39fd5b874d9d634b13e4cee51
Fix T42344: EWA filter produces blured results
Derivatives variable names are swapped in the old EWA filter code,
need to adjust for that.
TODO: Make naming fore clear in there.
===================================================================
M source/blender/blenlib/intern/math_interp.c
===================================================================
diff --git a/source/blender/blenlib/intern/math_interp.c
b/source/blender/blenlib/intern/math_interp.c
index 4feb954..a0c47be 100644
--- a/source/blender/blenlib/intern/math_interp.c
+++ b/source/blender/blenlib/intern/math_interp.c
@@ -467,7 +467,7 @@ void BLI_ewa_filter(const int width, const int height,
/* scaling dxt/dyt by full resolution can cause overflow because of
huge A/B/C and esp. F values,
* scaling by aspect ratio alone does the opposite, so try something in
between instead... */
const float ff2 = (float)width, ff = sqrtf(ff2), q = (float)height / ff;
- const float Ux = du[0] * ff, Vx = dv[0] * q, Uy = du[1] * ff, Vy =
dv[1] * q;
+ const float Ux = du[0] * ff, Vx = du[1] * q, Uy = dv[0] * ff, Vy =
dv[1] * q;
float A = Vx * Vx + Vy * Vy;
float B = -2.0f * (Ux * Vx + Uy * Vy);
float C = Ux * Ux + Uy * Uy;
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