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Switch-Toolbox/Switch_Toolbox_Library/FileFormats/R4G4.cs
2019-05-04 12:48:23 -04:00

44 lines
1.3 KiB
C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Switch_Toolbox.Library
{
public class R4G4
{
public static byte[] Decompress(byte[] Input, int Width, int Height, bool Alpha)
{
byte[] Output = new byte[Width * Height * 4];
byte[] comp = new byte[4] { 0xFF, 0xFF, 0xFF, 0xFF };
int bpp = (int)STGenericTexture.GetBytesPerPixel(TEX_FORMAT.R4G4_UNORM);
for (int Y = 0; Y < Height; Y++)
{
for (int X = 0; X < Width; X++)
{
int InputOffset = (Y * Width + X) * bpp;
int OutputOffset = (Y * Width + X) * 4;
int pixel = 0;
for (int i = 0; i < bpp; i++)
pixel |= Input[InputOffset + i] << (8 * i);
comp[0] = (byte)((pixel & 0xF) * 17);
comp[1] = (byte)(((pixel & 0xF0) >> 4) * 17);
Output[OutputOffset + 0] = comp[0];
Output[OutputOffset + 1] = comp[1];
Output[OutputOffset + 2] = comp[2];
Output[OutputOffset + 3] = comp[3];
}
}
return Output;
}
}
}