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Fix T68076: Color Correction node generates NaN

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This is the same fix that the `GammaOperation` uses.

Differential Revision: https://developer.blender.org/D6696

Reviewers: brecht
This commit is contained in:
Jacques Lucke
2020-02-06 10:19:51 +01:00
parent 3caefc89ee
commit 10705807fe
1 changed files with 4 additions and 3 deletions
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7
source/blender/compositor/operations/COM_ColorCorrectionOperation.cpp
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@@ -117,9 +117,10 @@ void ColorCorrectionOperation::executePixelSampled(float output[4],
g = 0.5f + ((g - 0.5f) * contrast);
b = 0.5f + ((b - 0.5f) * contrast);
r = powf(r * gain + lift, invgamma);
g = powf(g * gain + lift, invgamma);
b = powf(b * gain + lift, invgamma);
/* Check for negative values to avoid nan. */
r = (r > 0.0f) ? powf(r * gain + lift, invgamma) : r;
g = (g > 0.0f) ? powf(g * gain + lift, invgamma) : g;
b = (b > 0.0f) ? powf(b * gain + lift, invgamma) : b;
// mix with mask
r = mvalue * inputImageColor[0] + value * r;