/// <summary>
/// Converts an indexed 256 color image to Rgba32
/// </summary>
/// <param name="inputImage"></param>
/// <param name="textureFormat"></param>
/// <returns></returns>
public Image <Rgba32> ConvertTexture(IndexedColor256Image inputImage, TextureFormat textureFormat)
{
if (inputImage == null)
{
throw new ArgumentNullException(nameof(inputImage));
}
return(InternalConvertTexture(inputImage, textureFormat));
}
/// <summary>
/// Loads a texture and creates it using the specified factory
/// </summary>
/// <param name="inputImage"></param>
/// <param name="textureFormat"></param>
/// <param name="mipmap"></param>
/// <param name="gd"></param>
/// <param name="factory"></param>
/// <returns></returns>
public Texture LoadTexture(IndexedColor256Image inputImage, TextureFormat textureFormat, bool mipmap, GraphicsDevice gd, ResourceFactory factory)
{
if (inputImage == null)
{
throw new ArgumentNullException(nameof(inputImage));
}
var imageSharpTexture = InternalLoadTexture(inputImage, textureFormat, mipmap);
return(imageSharpTexture.CreateDeviceTexture(gd, factory));
}
/// <summary>
/// Loads a texture and creates it using the specified graphics device's resource factory
/// The texture is added to the given cache
/// </summary>
/// <param name="inputImage"></param>
/// <param name="textureFormat"></param>
/// <param name="mipmap"></param>
/// <param name="name"></param>
/// <param name="gd"></param>
/// <param name="cache"></param>
/// <returns></returns>
public Texture LoadTexture(IndexedColor256Image inputImage, TextureFormat textureFormat, bool mipmap, string name, GraphicsDevice gd, ResourceCache cache)
{
if (inputImage == null)
{
throw new ArgumentNullException(nameof(inputImage));
}
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
var imageSharpTexture = InternalLoadTexture(inputImage, textureFormat, mipmap);
return(cache.AddTexture2D(gd, gd.ResourceFactory, imageSharpTexture, name));
}
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));
}
private ImageSharpTexture InternalLoadTexture(IndexedColor256Image inputImage, TextureFormat textureFormat, bool mipmap)
{
var image = InternalConvertTexture(inputImage, textureFormat);
return(new ImageSharpTexture(image, mipmap));
}
