private Image <Rgba32> InternalConvertTexture(IndexedColor256Image inputImage, TextureFormat textureFormat)
{
var pixels = ImageConversionUtils.ConvertIndexedToRgba32(inputImage, textureFormat);
//Alpha tested textures have their fully transparent pixels modified so samplers won't sample the color used and blend it
//This stops the color from bleeding through
if (textureFormat == TextureFormat.AlphaTest ||
textureFormat == TextureFormat.IndexAlpha)
{
ImageConversionUtils.BoxFilter3x3(pixels, inputImage.Width, inputImage.Height);
}
//Rescale image to nearest power of 2
(var scaledWidth, var scaledHeight) = ComputeScaledSize((uint)inputImage.Width, (uint)inputImage.Height);
var scaledPixels = ImageConversionUtils.ResampleImage(new Span <Rgba32>(pixels), inputImage.Width, inputImage.Height, (int)scaledWidth, (int)scaledHeight);
return(Image.LoadPixelData(scaledPixels, (int)scaledWidth, (int)scaledHeight));
}
/// <summary>
/// Computes the scaled size of a texture that has the given width and height
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public (uint, uint) ComputeScaledSize(uint width, uint height)
{
return(ImageConversionUtils.ComputeScaledSize(width, height, _powerOf2Textures.Value, _maxSize.Value, _roundDown.Value, _picMip.Value));
}
/// <summary>
/// Computes the scaled size of a texture that has the given width and height
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
public (int, int) ComputeScaledSize(int width, int height)
{
return(ImageConversionUtils.ComputeScaledSize(width, height, _powerOf2Textures.Boolean, _maxSize.Integer, _roundDown.Integer, _picMip.Integer));
}
