public float[] GenerateLUTImage(uint width, uint height)
{
float ratio = 1.0f / (width - 1);
int index = 0;
float[] data = new float[width * height];
for (int h = 0; h < height; h++)
{
for (int w = 0; w < width; w++)
{
data[index++] = CurveHelper.Interpolate(LutTable[h].Intensity, w * ratio);
}
}
return(data);
}
static void UpdateUniforms(ShaderProgram shader)
{
var lightingEngine = LightingEngine.LightSettings;
var colorCorrection = lightingEngine.Resources.ColorCorrectionFiles.FirstOrDefault().Value;
shader.SetFloat("uGamma", colorCorrection.Gamma);
shader.SetFloat("uBrightness", colorCorrection.Brightness);
shader.SetFloat("uSaturation", colorCorrection.Saturation);
shader.SetFloat("uHue", colorCorrection.Hue);
shader.SetVector4("uToycamLevel1", colorCorrection.ToyCamLevel1.ToVector4());
shader.SetVector4("uToycamLevel2", colorCorrection.ToyCamLevel2.ToVector4());
var curves = colorCorrection.Level;
if (curves != null)
{
float numValues = 256;
float amount = 1.0f / (numValues - 1f);
float time = 0;
//Level curve
for (int j = 0; j < numValues; j++)
{
float x = CurveHelper.Interpolate(curves[0], time);
float y = CurveHelper.Interpolate(curves[1], time);
float z = CurveHelper.Interpolate(curves[2], time);
float w = CurveHelper.Interpolate(curves[3], time);
Vector4 curveValues = new Vector4(x, y, z, w);
GL.Uniform4(GL.GetUniformLocation(shader.program, $"uCurve0[{j}]"), curveValues);
GL.Uniform4(GL.GetUniformLocation(shader.program, $"uCurve1[{j}]"), curveValues);
time += amount;
}
}
}