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Fix #33177: OSL render difference with missing textures and HSV nodes.

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This commit is contained in:
Brecht Van Lommel
2012-11-20 17:40:21 +00:00
parent ab1b5af08d
commit fd619cd7f1
6 changed files with 102 additions and 26 deletions
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29
intern/cycles/kernel/shaders/node_brightness.osl
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@@ -20,32 +20,15 @@
shader node_brightness(
color ColorIn = color(0.8, 0.8, 0.8),
float Brightness = 0.0,
float Bright = 0.0,
float Contrast = 0.0,
output color ColorOut = color(0.8, 0.8, 0.8))
{
float delta = Contrast * (1.0 / 200.0);
float a = 1.0 - delta * 2.0;
float b;
float a = 1.0 + Contrast;
float b = Bright - Contrast*0.5;
/* input value is a percentage */
float bright_factor = Brightness / 100.0;
/*
* The algorithm is by Werner D. Streidt
* (http://visca.com/ffactory/archives/5-99/msg00021.html)
* Extracted of OpenCV demhist.c
*/
if (Contrast > 0.0) {
a = (a < 0.0 ? 1.0 / a : 0.0);
b = a * (bright_factor - delta);
}
else {
delta *= -1.0;
b = a * (bright_factor + delta);
}
ColorOut = a * ColorIn + b;
ColorOut[0] = max(a*ColorIn[0] + b, 0.0);
ColorOut[1] = max(a*ColorIn[1] + b, 0.0);
ColorOut[2] = max(a*ColorIn[2] + b, 0.0);
}