public static Bitmap DecompressBC1(Byte[] data, int width, int height, bool IsSRGB)
{
int W = (width + 3) / 4;
int H = (height + 3) / 4;
byte[] Output = new byte[W * H * 64];
for (int Y = 0; Y < H; Y++)
{
for (int X = 0; X < W; X++)
{
int IOffs = (Y * W + X) * 8;
byte[] Tile = BCnDecodeTile(data, IOffs, true);
int TOffset = 0;
for (int TY = 0; TY < 4; TY++)
{
for (int TX = 0; TX < 4; TX++)
{
int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
Output[OOffset + 0] = Tile[TOffset + 0];
Output[OOffset + 1] = Tile[TOffset + 1];
Output[OOffset + 2] = Tile[TOffset + 2];
Output[OOffset + 3] = Tile[TOffset + 3];
TOffset += 4;
}
}
}
}
return(BitmapExtension.GetBitmap(Output, W * 4, H * 4));
}
public static System.Drawing.Bitmap DecodeDataToBitmap(byte[] ImageData, byte[] PaletteData, uint width, uint height, TEX_FORMAT format, PALETTE_FORMAT palleteFormat)
{
var FormatGC = FromGenericFormat(format);
var PalleteFormatGC = FromGenericPaletteFormat(palleteFormat);
return(BitmapExtension.GetBitmap(DecodeData(ImageData, PaletteData, width, height, FormatGC, PalleteFormatGC),
(int)width, (int)height, System.Drawing.Imaging.PixelFormat.Format32bppArgb));
}
public static Bitmap DecompressBC4(Byte[] data, int width, int height, bool IsSNORM)
{
int W = (width + 3) / 4;
int H = (height + 3) / 4;
byte[] Output = new byte[W * H * 64];
for (int Y = 0; Y < H; Y++)
{
for (int X = 0; X < W; X++)
{
int IOffs = (Y * W + X) * 8;
byte[] Red = new byte[8];
Red[0] = data[IOffs + 0];
Red[1] = data[IOffs + 1];
if (IsSNORM)
{
CalculateBC3AlphaS(Red);
}
else
{
CalculateBC3Alpha(Red);
}
int RedLow = Get32(data, IOffs + 2);
int RedHigh = Get16(data, IOffs + 6);
ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32;
int TOffset = 0;
int TW = Math.Min(width - X * 4, 4);
int TH = Math.Min(height - Y * 4, 4);
for (int TY = 0; TY < 4; TY++)
{
for (int TX = 0; TX < 4; TX++)
{
int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
byte RedPx = Red[(RedCh >> (TY * 12 + TX * 3)) & 7];
Output[OOffset + 0] = RedPx;
Output[OOffset + 1] = RedPx;
Output[OOffset + 2] = RedPx;
Output[OOffset + 3] = 255;
TOffset += 4;
}
}
}
}
return(BitmapExtension.GetBitmap(Output, W * 4, H * 4));
}
public Bitmap CreateScreenshot(int width, int height, bool useAlpha = false)
{
int imageSize = width * height * 4;
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
byte[] output = new byte[imageSize];
GL.ReadPixels(0, 0, width, height, PixelFormat.Bgra, PixelType.UnsignedByte, output);
var bitmap = BitmapExtension.GetBitmap(output, width, height);
bitmap.RotateFlip(System.Drawing.RotateFlipType.RotateNoneFlipY);
return(bitmap);
}
public static Bitmap DecompressBC3(Byte[] data, int width, int height, bool IsSRGB)
{
int W = (width + 3) / 4;
int H = (height + 3) / 4;
byte[] Output = new byte[W * H * 64];
for (int Y = 0; Y < H; Y++)
{
for (int X = 0; X < W; X++)
{
int IOffs = (Y * W + X) * 16;
byte[] Tile = BCnDecodeTile(data, IOffs + 8, false);
byte[] Alpha = new byte[8];
Alpha[0] = data[IOffs + 0];
Alpha[1] = data[IOffs + 1];
CalculateBC3Alpha(Alpha);
int AlphaLow = Get32(data, IOffs + 2);
int AlphaHigh = Get16(data, IOffs + 6);
ulong AlphaCh = (uint)AlphaLow | (ulong)AlphaHigh << 32;
int TOffset = 0;
for (int TY = 0; TY < 4; TY++)
{
for (int TX = 0; TX < 4; TX++)
{
int OOffset = (X * 4 + TX + (Y * 4 + TY) * W * 4) * 4;
byte AlphaPx = Alpha[(AlphaCh >> (TY * 12 + TX * 3)) & 7];
Output[OOffset + 0] = Tile[TOffset + 0];
Output[OOffset + 1] = Tile[TOffset + 1];
Output[OOffset + 2] = Tile[TOffset + 2];
Output[OOffset + 3] = AlphaPx;
TOffset += 4;
}
}
}
}
return(BitmapExtension.GetBitmap(Output, W * 4, H * 4));
}
public static System.Drawing.Bitmap DecodeDataToBitmap(byte[] ImageData, ushort[] PaletteData, uint width, uint height, TextureFormats format, PaletteFormats palleteFormat)
{
return(BitmapExtension.GetBitmap(DecodeData(ImageData, PaletteData, width, height, format, palleteFormat),
(int)width, (int)height, System.Drawing.Imaging.PixelFormat.Format32bppArgb));
}
public static Bitmap DecompressCompLibBlock(Byte[] data, int width, int height, DDS.DXGI_FORMAT format, bool GetBitmap)
{
return(BitmapExtension.GetBitmap(DecompressBlock(data, width, height, format), (int)width, (int)height));
}
public static Bitmap DecompressBC5(Byte[] data, int width, int height, bool IsSNORM)
{
int W = (width + 3) / 4;
int H = (height + 3) / 4;
byte[] Output = new byte[W * H * 64];
for (int Y = 0; Y < H; Y++)
{
for (int X = 0; X < W; X++)
{
int IOffs = (Y * W + X) * 16;
byte[] Red = new byte[8];
byte[] Green = new byte[8];
Red[0] = data[IOffs + 0];
Red[1] = data[IOffs + 1];
Green[0] = data[IOffs + 8];
Green[1] = data[IOffs + 9];
if (IsSNORM == true)
{
CalculateBC3AlphaS(Red);
CalculateBC3AlphaS(Green);
}
else
{
CalculateBC3Alpha(Red);
CalculateBC3Alpha(Green);
}
int RedLow = Get32(data, IOffs + 2);
int RedHigh = Get16(data, IOffs + 6);
int GreenLow = Get32(data, IOffs + 10);
int GreenHigh = Get16(data, IOffs + 14);
ulong RedCh = (uint)RedLow | (ulong)RedHigh << 32;
ulong GreenCh = (uint)GreenLow | (ulong)GreenHigh << 32;
int TW = Math.Min(width - X * 4, 4);
int TH = Math.Min(height - Y * 4, 4);
if (IsSNORM == true)
{
for (int TY = 0; TY < TH; TY++)
{
for (int TX = 0; TX < TW; TX++)
{
int Shift = TY * 12 + TX * 3;
int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4;
byte RedPx = Red[(RedCh >> Shift) & 7];
byte GreenPx = Green[(GreenCh >> Shift) & 7];
if (IsSNORM == true)
{
RedPx += 0x80;
GreenPx += 0x80;
}
float NX = (RedPx / 255f) * 2 - 1;
float NY = (GreenPx / 255f) * 2 - 1;
float NZ = (float)Math.Sqrt(1 - (NX * NX + NY * NY));
Output[OOffset + 0] = Clamp((NZ + 1) * 0.5f);
Output[OOffset + 1] = Clamp((NY + 1) * 0.5f);
Output[OOffset + 2] = Clamp((NX + 1) * 0.5f);
Output[OOffset + 3] = 0xff;
}
}
}
else
{
for (int TY = 0; TY < TH; TY++)
{
for (int TX = 0; TX < TW; TX++)
{
int Shift = TY * 12 + TX * 3;
int OOffset = ((Y * 4 + TY) * width + (X * 4 + TX)) * 4;
byte RedPx = Red[(RedCh >> Shift) & 7];
byte GreenPx = Green[(GreenCh >> Shift) & 7];
Output[OOffset + 0] = 255;
Output[OOffset + 1] = GreenPx;
Output[OOffset + 2] = RedPx;
Output[OOffset + 3] = 255;
}
}
}
}
}
return(BitmapExtension.GetBitmap(Output, W * 4, H * 4));
}
public static System.Drawing.Bitmap DecodeBlockToBitmap(byte[] Input, int Width, int Height, PICASurfaceFormat picaFormat)
{
return(BitmapExtension.GetBitmap(DecodeBlock(Input, Width, Height, picaFormat),
Width, Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb));
}
//Much help from encoding thanks to this
// https://github.com/Cruel/3dstex/blob/master/src/Encoder.cpp
public static byte[] EncodeBlock(byte[] Input, int Width, int Height, PICASurfaceFormat PicaFormat)
{
int ImageSize = CalculateLength(Width, Height, PicaFormat);
if (PicaFormat == PICASurfaceFormat.ETC1)
{
return(SmashForge.RG_ETC1.encodeETC(BitmapExtension.GetBitmap(Input, Width, Height)));
}
else if (PicaFormat == PICASurfaceFormat.ETC1A4)
{
return(SmashForge.RG_ETC1.encodeETCa4(BitmapExtension.GetBitmap(Input, Width, Height)));
}
var mem = new System.IO.MemoryStream();
using (var writer = new FileWriter(mem))
{
for (int TY = 0; TY < Height; TY += 8)
{
for (int TX = 0; TX < Width; TX += 8)
{
for (int Px = 0; Px < 64; Px++)
{
int X = SwizzleLUT[Px] & 7;
int Y = (SwizzleLUT[Px] - X) >> 3;
int IOffs = (TX + X + ((TY + Y) * Width)) * 4;
if (PicaFormat == PICASurfaceFormat.RGBA8)
{
writer.Write(Input[IOffs + 3]);
writer.Write(Input[IOffs + 0]);
writer.Write(Input[IOffs + 1]);
writer.Write(Input[IOffs + 2]);
}
else if (PicaFormat == PICASurfaceFormat.RGB8)
{
writer.Write(Input[IOffs + 0]);
writer.Write(Input[IOffs + 1]);
writer.Write(Input[IOffs + 2]);
}
else if (PicaFormat == PICASurfaceFormat.A8)
{
writer.Write(Input[IOffs]);
}
else if (PicaFormat == PICASurfaceFormat.L8)
{
writer.Write(ConvertBRG8ToL(
new byte[]
{
Input[IOffs + 0],
Input[IOffs + 1],
Input[IOffs + 2]
}));
}
else if (PicaFormat == PICASurfaceFormat.LA8)
{
writer.Write(Input[IOffs + 3]);
writer.Write(ConvertBRG8ToL(
new byte[]
{
Input[IOffs + 0],
Input[IOffs + 1],
Input[IOffs + 2]
}));
}
else if (PicaFormat == PICASurfaceFormat.RGB565)
{
ushort R = (ushort)(Convert8To5(Input[IOffs + 0]));
ushort G = (ushort)(Convert8To6(Input[IOffs + 1]) << 5);
ushort B = (ushort)(Convert8To5(Input[IOffs + 2]) << 11);
writer.Write((ushort)(R | G | B));
}
else if (PicaFormat == PICASurfaceFormat.RGBA4)
{
ushort R = (ushort)(Convert8To4(Input[IOffs]) << 4);
ushort G = (ushort)(Convert8To4(Input[IOffs + 1]) << 8);
ushort B = (ushort)(Convert8To4(Input[IOffs + 2]) << 12);
ushort A = (ushort)(Convert8To4(Input[IOffs + 3]));
writer.Write((ushort)(R | G | B | A));
}
else if (PicaFormat == PICASurfaceFormat.RGBA5551)
{
ushort R = (ushort)(Convert8To5(Input[IOffs + 0]) << 1);
ushort G = (ushort)(Convert8To5(Input[IOffs + 1]) << 6);
ushort B = (ushort)(Convert8To5(Input[IOffs + 2]) << 11);
ushort A = (ushort)(Convert8To1(Input[IOffs + 3]));
writer.Write((ushort)(R | G | B | A));
}
else if (PicaFormat == PICASurfaceFormat.LA4)
{
byte A = Input[IOffs + 3];
byte L = ConvertBRG8ToL(
new byte[]
{
Input[IOffs + 0],
Input[IOffs + 1],
Input[IOffs + 2]
});
writer.Write((byte)((A >> 4) | (L & 0xF0)));
}
else if (PicaFormat == PICASurfaceFormat.L4)
{
//Skip alpha channel
byte L1 = ConvertBRG8ToL(
new byte[]
{
Input[IOffs + 0],
Input[IOffs + 1],
Input[IOffs + 2]
});
byte L2 = ConvertBRG8ToL(
new byte[]
{
Input[IOffs + 4],
Input[IOffs + 5],
Input[IOffs + 6]
});
writer.Write((byte)((L1 >> 4) | (L2 & 0xF0)));
Px++;
}
else if (PicaFormat == PICASurfaceFormat.A4)
{
byte A1 = (byte)(Input[IOffs + 3] >> 4);
byte A2 = (byte)(Input[IOffs + 7] & 0xF0);
writer.Write((byte)(A1 | A2));
Px++;
}
else if (PicaFormat == PICASurfaceFormat.HiLo8)
{
writer.Write(Input[IOffs]);
writer.Write(Input[IOffs + 1]);
}
}
}
}
}
byte[] newOutput = mem.ToArray();
// if (newOutput.Length != ImageSize)
// throw new Exception($"Invalid image size! Expected {ImageSize} got {newOutput.Length}");
if (newOutput.Length > 0)
{
return(newOutput);
}
else
{
return(new byte[CalculateLength(Width, Height, PicaFormat)]);
}
}