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PainterlyUNO/Matrix App/PregeneratedMods/Grayscale.cs

35 lines
1.0 KiB
C#

using System;
using System.Collections.Generic;
using System.Text;
using static Matrix_App.GifGeneratorUtils;
namespace Matrix_App.PregeneratedMods
{
public sealed class Grayscale : MatrixGifGenerator
{
[UiDescriptionAttribute(title: "use Luminance", description: "Use luminance as defined by ITU-R BT.709 as grayscale output")]
public bool byLuminance = false;
protected override void ColorFragment(in int x, in int y, in float u, in float v, in int frame, out float r, out float g, out float b)
{
SampleFrame(actualStore, frame, x, y, width, out float lr, out float lg, out float lb);
if (byLuminance)
{
float luminance = 0.2126f * lr + 0.7152f * lg + 0.0722f * lb;
r = luminance;
g = luminance;
b = luminance;
} else
{
float average = (lr + lg + lb) * 0.3333f;
r = average;
g = average;
b = average;
}
}
}
}