internal I8Image(Bitmap bitmap)
{
this.impl_ = new Rgb24Image(bitmap);
}
public IMipMap <IImage> Read(Stream stream)
{
using var pfimImage = Pfim.Pfim.FromStream(stream);
return(MipMapUtil.From(
pfimImage.MipMaps.Select(pfimMipMap => {
var mmWidth = pfimMipMap.Width;
var mmHeight = pfimMipMap.Height;
switch (pfimImage.Format)
{
case ImageFormat.Rgba32: {
var image = new Rgba32Image(mmWidth, mmHeight);
image.Mutate((_, setHandler) => {
for (var y = 0; y < mmHeight; ++y)
{
for (var x = 0; x < mmWidth; ++x)
{
var i = pfimMipMap.DataOffset +
4 * (y * mmWidth + x);
var b = pfimImage.Data[i + 0];
var g = pfimImage.Data[i + 1];
var r = pfimImage.Data[i + 2];
var a = pfimImage.Data[i + 3];
setHandler(x, y, r, g, b, a);
}
}
});
return image as IImage;
}
case ImageFormat.Rgb24: {
var image = new Rgb24Image(mmWidth, mmHeight);
image.Mutate((_, setHandler) => {
for (var y = 0; y < mmHeight; ++y)
{
for (var x = 0; x < mmWidth; ++x)
{
var i = pfimMipMap.DataOffset +
3 * (y * mmWidth + x);
var b = pfimImage.Data[i + 0];
var g = pfimImage.Data[i + 1];
var r = pfimImage.Data[i + 2];
setHandler(x, y, r, g, b);
}
}
});
return image;
}
default:
throw new NotImplementedException(
$"Unsupported Pfim format: {pfimImage.Format}");
}
})
.ToList()));
}
