public static byte[] Save(Bitmap bmp, ImageSettings settings)
{
settings.Width = bmp.Width;
settings.Height = bmp.Height;
var points = GetPointSequence(settings);
var ms = new MemoryStream();
var etc1encoder = new ETC1.Encoder();
Enum.TryParse <DXT.Formats>(settings.Format.ToString(), false, out var dxtFormat);
var dxtencoder = new DXT.Encoder(dxtFormat);
using (var bw = new BinaryWriterX(ms))
{
foreach (var point in points)
{
int x = Clamp(point.X, 0, bmp.Width);
int y = Clamp(point.Y, 0, bmp.Height);
var color = bmp.GetPixel(x, y);
if (settings.PixelShader != null)
{
color = settings.PixelShader(color);
}
switch (settings.Format)
{
case Format.L8:
bw.Write(color.G);
break;
case Format.A8:
bw.Write(color.A);
break;
case Format.LA44:
bw.WriteNibble(color.A / 16);
bw.WriteNibble(color.G / 16);
break;
case Format.LA88:
bw.Write(color.A);
bw.Write(color.G);
break;
case Format.HL88:
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.RGB565:
bw.Write((short)((color.R / 8 << 11) | (color.G / 4 << 5) | (color.B / 8)));
break;
case Format.RGB888:
bw.Write(color.B);
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.RGBA5551:
bw.Write((short)((color.R / 8 << 11) | (color.G / 8 << 6) | (color.B / 8 << 1) | color.A / 128));
break;
case Format.RGBA4444:
bw.WriteNibble(color.A / 16);
bw.WriteNibble(color.B / 16);
bw.WriteNibble(color.G / 16);
bw.WriteNibble(color.R / 16);
break;
case Format.RGBA8888:
bw.Write(color.A);
bw.Write(color.B);
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.ETC1:
case Format.ETC1A4:
etc1encoder.Set(color, data =>
{
if (settings.Format == Format.ETC1A4)
{
bw.Write(data.Alpha);
}
bw.WriteStruct(data.Block);
});
break;
case Format.DXT1:
case Format.DXT5:
dxtencoder.Set(color, data =>
{
if (settings.Format == Format.DXT5)
{
bw.Write(data.alpha);
}
bw.Write(data.block);
});
break;
case Format.L4:
bw.WriteNibble(color.G / 16);
break;
case Format.A4:
bw.WriteNibble(color.A / 16);
break;
default:
throw new NotSupportedException();
}
}
}
return(ms.ToArray());
}
public static byte[] Save(Bitmap bmp, ImageSettings settings)
{
settings.Width = bmp.Width;
settings.Height = bmp.Height;
var points = GetPointSequence(settings);
var ms = new MemoryStream();
var etc1encoder = new ETC1.Encoder();
using (var bw = new BinaryWriterX(ms))
{
foreach (var point in points)
{
int x = Clamp(point.X, 0, bmp.Width);
int y = Clamp(point.Y, 0, bmp.Height);
var color = bmp.GetPixel(x, y);
//if (color.A == 0) color = default(Color); // daigasso seems to need this
switch (settings.Format)
{
case Format.L8:
bw.Write(color.G);
break;
case Format.A8:
bw.Write(color.A);
break;
case Format.LA44:
bw.WriteNibble(color.A / 16);
bw.WriteNibble(color.G / 16);
break;
case Format.LA88:
bw.Write(color.A);
bw.Write(color.G);
break;
case Format.HL88:
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.RGB565:
bw.Write((short)((color.R / 8 << 11) | (color.G / 4 << 5) | (color.B / 8)));
break;
case Format.RGB888:
bw.Write(color.B);
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.RGBA5551:
bw.Write((short)((color.R / 8 << 11) | (color.G / 8 << 6) | (color.B / 8 << 1) | color.A / 128));
break;
case Format.RGBA4444:
bw.WriteNibble(color.A / 16);
bw.WriteNibble(color.B / 16);
bw.WriteNibble(color.G / 16);
bw.WriteNibble(color.R / 16);
break;
case Format.RGBA8888:
bw.Write(color.A);
bw.Write(color.B);
bw.Write(color.G);
bw.Write(color.R);
break;
case Format.ETC1:
case Format.ETC1A4:
etc1encoder.Set(color, data =>
{
if (settings.Format == Format.ETC1A4)
{
bw.Write(data.Alpha);
}
bw.WriteStruct(data.Block);
});
break;
case Format.L4:
bw.WriteNibble(color.G / 16);
break;
case Format.A4:
bw.WriteNibble(color.A / 16);
break;
default:
throw new NotSupportedException();
}
}
}
return(ms.ToArray());
}
