plugins/systembell: Adapt shader to color management changes

BUG: 494305

src/plugins/systembell/shaders/invert.frag

@@ -13,12 +13,12 @@ void main()
     tex = adjustSaturation(tex);
 
     // to preserve perceptual contrast, apply the inversion in gamma 2.2 space
-    tex = nitsToEncoding(tex, gamma22_EOTF, destinationReferenceLuminance);
+    tex = nitsToEncoding(tex, gamma22_EOTF, 0.0, destinationReferenceLuminance);
     tex.rgb /= max(0.001, tex.a);
     tex.rgb = vec3(1.0) - tex.rgb;
     tex *= modulation;
     tex.rgb *= tex.a;
-    tex = encodingToNits(tex, gamma22_EOTF, destinationReferenceLuminance);
+    tex = encodingToNits(tex, gamma22_EOTF, 0.0, destinationReferenceLuminance);
 
     gl_FragColor = nitsToDestinationEncoding(tex);
 }

src/plugins/systembell/shaders/invert_core.frag

@@ -17,12 +17,12 @@ void main()
     tex = adjustSaturation(tex);
 
     // to preserve perceptual contrast, apply the inversion in gamma 2.2 space
-    tex = nitsToEncoding(tex, gamma22_EOTF, destinationReferenceLuminance);
+    tex = nitsToEncoding(tex, gamma22_EOTF, 0.0, destinationReferenceLuminance);
     tex.rgb /= max(0.001, tex.a);
     tex.rgb = vec3(1.0) - tex.rgb;
     tex *= modulation;
     tex.rgb *= tex.a;
-    tex = encodingToNits(tex, gamma22_EOTF, destinationReferenceLuminance);
+    tex = encodingToNits(tex, gamma22_EOTF, 0.0, destinationReferenceLuminance);
 
     fragColor = nitsToDestinationEncoding(tex);
 }