Working

shaders/studio-color/shader.slang

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+float4 shadeVideo(ShaderContext context)
+{
+	float2 uv = clamp(context.uv + offset, float2(0.0, 0.0), float2(1.0, 1.0));
+	float4 color = sampleVideo(uv);
+
+	color.rgb *= brightness;
+	color *= tint;
+
+	if (invert)
+		color.rgb = 1.0 - color.rgb;
+
+	if (mode == 1)
+	{
+		float luma = dot(color.rgb, float3(0.2126, 0.7152, 0.0722));
+		color.rgb = float3(luma, luma, luma);
+	}
+	else if (mode == 2)
+	{
+		color.rgb = floor(color.rgb * 4.0) / 4.0;
+	}
+
+	return saturate(color);
+}