private static byte[] EncodeI8Routine(int[] ImageData, int Width, int Height)
{
ImageData = BlockFormat.Encode(ImageData, Width, Height, 8, 4);
byte[] I8Data = new byte[ImageData.Length];
for (int i = 0; i < I8Data.Length; i++)
{
I8Data[i] = (byte)((((ImageData[i] >> 16) & 0xFF) * 0.2126) + (((ImageData[i] >> 8) & 0xFF) * 0.7152) + ((ImageData[i] & 0xFF) * 0.0722));
}
return(I8Data);
}
private static byte[] EncodeIA8Routine(int[] ImageData, int Width, int Height)
{
ImageData = BlockFormat.Encode(ImageData, Width, Height, 4, 4);
byte[] IA8Data = new byte[ImageData.Length * 2];
for (int i = 0; i < IA8Data.Length; i++)
{
int idx = i * 2;
IA8Data[idx] = (byte)(ImageData[i] >> 24);
IA8Data[idx + 1] = (byte)((((ImageData[i] >> 16) & 0xFF) * 0.2126) + (((ImageData[i] >> 8) & 0xFF) * 0.7152)
+ ((ImageData[i] & 0xFF) * 0.0722));
}
return(IA8Data);
}
private static byte[] EncodeIA4Routine(int[] ImageData, int Width, int Height)
{
ImageData = BlockFormat.Encode(ImageData, Width, Height, 8, 4);
byte[] PackedIA4Data = new byte[ImageData.Length];
for (int i = 0; i < PackedIA4Data.Length; i++)
{
byte LeftValue = (byte)((ImageData[i] >> 24) & 0xFF); // Alpha
byte RightValue = (byte)(ImageData[i] >> 16); // Only use red
PackedIA4Data[i] = (byte)(((LeftValue / 16) << 4) | (RightValue / 16));
}
return(PackedIA4Data);
}
private static byte[] C4ImageSubroutineEncode(int[] ImageData, ushort[] Palette, int Width, int Height, bool UsesBlocks = true)
{
int[] RGB8Palette = new int[Palette.Length];
for (int i = 0; i < RGB8Palette.Length; i++)
{
RGB8Palette[i] = (int)RGB5A3.ToARGB8(Palette[i]);
}
byte[] C4Data = new byte[ImageData.Length];
for (int i = 0; i < C4Data.Length; i++)
{
C4Data[i] = ColorUtilities.ClosestColorRGB(ImageData[i], RGB8Palette);
}
return(Utilities.Utilities.CondenseNibbles(UsesBlocks ? BlockFormat.Encode(C4Data, Width, Height, 8, 8) : C4Data));
}
private static byte[] C8ImageSubroutineEncode(int[] ImageData, ushort[] Palette, int Width, int Height)
{
int[] RGB8Palette = new int[Palette.Length];
for (int i = 0; i < RGB8Palette.Length; i++)
{
RGB8Palette[i] = (int)RGB5A3.ToARGB8(Palette[i]);
}
byte[] C8Data = new byte[ImageData.Length];
for (int i = 0; i < C8Data.Length; i++)
{
C8Data[i] = Utilities.ColorUtilities.ClosestColorRGB(ImageData[i], RGB8Palette);
}
return(BlockFormat.Encode(C8Data, Width, Height, 8, 4));
}
private static byte[] EncodeI4Routine(int[] ImageData, int Width, int Height)
{
ImageData = BlockFormat.Encode(ImageData, Width, Height, 8, 8);
byte[] PackedI4Data = new byte[ImageData.Length / 2];
// We're only taking the red channel here for re-encoding.
for (int i = 0; i < PackedI4Data.Length; i++)
{
int idx = i * 2;
byte LeftValue = (byte)(ImageData[idx] >> 16);
byte RightValue = (byte)(ImageData[idx + 1] >> 16);
PackedI4Data[i] = (byte)(((LeftValue / 0x10) << 4) | (RightValue / 0x10));
}
return(PackedI4Data);
}