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Fixed hue shader turning pure white pixel to pure black on some GPUs.

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This commit is contained in:
David Salvisberg 2014-12-31 16:02:10 +01:00
parent 11cfe887c2
commit 8240f3333f
1 changed files with 6 additions and 2 deletions
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8
shader/hue.frag
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@ -29,7 +29,11 @@ void main ()
/* Make the user's adjustments */ /* Make the user's adjustments */
hue += hueAdjust; hue += hueAdjust;
// Convert back to YIQ /* Remember old I and color */
float IOriginal = I;
vec4 coOriginal = color;
/* Convert back to YIQ */
Q = chroma * sin (hue); Q = chroma * sin (hue);
I = chroma * cos (hue); I = chroma * cos (hue);
@ -40,5 +44,5 @@ void main ()
color.b = dot (yIQ, kYIQToB); color.b = dot (yIQ, kYIQToB);
/* Save the result */ /* Save the result */
gl_FragColor = color; gl_FragColor = (IOriginal == 0.0) ? coOriginal : color;
} }