public static Color[] DecodeETC1(ulong Data, ulong Alpha = ~0ul)
{
Color[] Result = new Color[4 * 4];
bool diffbit = ((Data >> 33) & 1) == 1;
bool flipbit = ((Data >> 32) & 1) == 1; //0: |||, 1: |-|
int r1, r2, g1, g2, b1, b2;
if (diffbit) //'differential' mode
{
int r = (int)((Data >> 59) & 0x1F);
int g = (int)((Data >> 51) & 0x1F);
int b = (int)((Data >> 43) & 0x1F);
r1 = (r << 3) | ((r & 0x1C) >> 2);
g1 = (g << 3) | ((g & 0x1C) >> 2);
b1 = (b << 3) | ((b & 0x1C) >> 2);
r += (int)((Data >> 56) & 0x7) << 29 >> 29;
g += (int)((Data >> 48) & 0x7) << 29 >> 29;
b += (int)((Data >> 40) & 0x7) << 29 >> 29;
r2 = (r << 3) | ((r & 0x1C) >> 2);
g2 = (g << 3) | ((g & 0x1C) >> 2);
b2 = (b << 3) | ((b & 0x1C) >> 2);
}
else //'individual' mode
{
r1 = (int)((Data >> 60) & 0xF) * 0x11;
g1 = (int)((Data >> 52) & 0xF) * 0x11;
b1 = (int)((Data >> 44) & 0xF) * 0x11;
r2 = (int)((Data >> 56) & 0xF) * 0x11;
g2 = (int)((Data >> 48) & 0xF) * 0x11;
b2 = (int)((Data >> 40) & 0xF) * 0x11;
}
int Table1 = (int)((Data >> 37) & 0x7);
int Table2 = (int)((Data >> 34) & 0x7);
for (int y3 = 0; y3 < 4; y3++)
{
for (int x3 = 0; x3 < 4; x3++)
{
//if (x + j + x3 >= physicalwidth) continue;
//if (y + i + y3 >= physicalheight) continue;
int val = (int)((Data >> (x3 * 4 + y3)) & 0x1);
bool neg = ((Data >> (x3 * 4 + y3 + 16)) & 0x1) == 1;
uint c;
if ((flipbit && y3 < 2) || (!flipbit && x3 < 2))
{
int add = ETC1Modifiers[Table1, val] * (neg ? -1 : 1);
c = GFXUtil.ToColorFormat((byte)(((Alpha >> ((x3 * 4 + y3) * 4)) & 0xF) * 0x11), (byte)ColorClamp(r1 + add), (byte)ColorClamp(g1 + add), (byte)ColorClamp(b1 + add), ColorFormat.ARGB8888);
}
else
{
int add = ETC1Modifiers[Table2, val] * (neg ? -1 : 1);
c = GFXUtil.ToColorFormat((byte)(((Alpha >> ((x3 * 4 + y3) * 4)) & 0xF) * 0x11), (byte)ColorClamp(r2 + add), (byte)ColorClamp(g2 + add), (byte)ColorClamp(b2 + add), ColorFormat.ARGB8888);
}
Result[y3 * 4 + x3] = Color.FromArgb((int)c);
//res[(i + y3) * stride + x + j + x3] = c;
}
}
return(Result);
}
public static unsafe Bitmap ToBitmap(byte[] Data, int Offset, int Width, int Height, ImageFormat Format, bool ExactSize = false)
{
if (Data == null || Data.Length < 1 || Offset < 0 || Offset >= Data.Length || Width < 1 || Height < 1)
{
return(null);
}
if (ExactSize && ((Width % 8) != 0 || (Height % 8) != 0))
{
return(null);
}
int physicalwidth = Width;
int physicalheight = Height;
if (!ExactSize)
{
Width = 1 << (int)Math.Ceiling(Math.Log(Width, 2));
Height = 1 << (int)Math.Ceiling(Math.Log(Height, 2));
}
Bitmap bitm = new Bitmap(physicalwidth, physicalheight);
BitmapData d = bitm.LockBits(new Rectangle(0, 0, bitm.Width, bitm.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
uint * res = (uint *)d.Scan0;
int offs = Offset;//0;
int stride = d.Stride / 4;
switch (Format)
{
case ImageFormat.RGBA8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] =
GFXUtil.ConvertColorFormat(
IOUtil.ReadU32LE(Data, offs + pos * 4),
ColorFormat.RGBA8888,
ColorFormat.ARGB8888);
/*GFXUtil.ToArgb(
* Data[offs + pos * 4],
* Data[offs + pos * 4 + 3],
* Data[offs + pos * 4 + 2],
* Data[offs + pos * 4 + 1]
* );*/
}
offs += 64 * 4;
}
}
break;
case ImageFormat.RGB8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] =
GFXUtil.ConvertColorFormat(
IOUtil.ReadU24LE(Data, offs + pos * 3),
ColorFormat.RGB888,
ColorFormat.ARGB8888);
/*GFXUtil.ToArgb(
* Data[offs + pos * 3 + 2],
* Data[offs + pos * 3 + 1],
* Data[offs + pos * 3 + 0]
* );*/
}
offs += 64 * 3;
}
}
break;
case ImageFormat.RGBA5551:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] =
GFXUtil.ConvertColorFormat(
IOUtil.ReadU16LE(Data, offs + pos * 2),
ColorFormat.ARGB1555,
ColorFormat.ARGB8888);
//GFXUtil.ARGB1555ToArgb(IOUtil.ReadU16LE(Data, offs + pos * 2));
}
offs += 64 * 2;
}
}
break;
case ImageFormat.RGB565:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] =
GFXUtil.ConvertColorFormat(
IOUtil.ReadU16LE(Data, offs + pos * 2),
ColorFormat.RGB565,
ColorFormat.ARGB8888);
//GFXUtil.RGB565ToArgb(IOUtil.ReadU16LE(Data, offs + pos * 2));
}
offs += 64 * 2;
}
}
break;
case ImageFormat.RGBA4:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] =
GFXUtil.ConvertColorFormat(
IOUtil.ReadU16LE(Data, offs + pos * 2),
ColorFormat.RGBA4444,
ColorFormat.ARGB8888);
/*GFXUtil.ToArgb(
* (byte)((Data[offs + pos * 2] & 0xF) * 0x11),
* (byte)((Data[offs + pos * 2 + 1] >> 4) * 0x11),
* (byte)((Data[offs + pos * 2 + 1] & 0xF) * 0x11),
* (byte)((Data[offs + pos * 2] >> 4) * 0x11)
* );*/
}
offs += 64 * 2;
}
}
break;
case ImageFormat.LA8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
Data[offs + pos * 2],
Data[offs + pos * 2 + 1],
Data[offs + pos * 2 + 1],
Data[offs + pos * 2 + 1],
ColorFormat.ARGB8888
);
}
offs += 64 * 2;
}
}
break;
case ImageFormat.HILO8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
Data[offs + pos * 2],
Data[offs + pos * 2 + 1],
Data[offs + pos * 2 + 1],
Data[offs + pos * 2 + 1],
ColorFormat.ARGB8888
);
}
offs += 64 * 2;
}
}
break;
case ImageFormat.L8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
Data[offs + pos],
Data[offs + pos],
Data[offs + pos],
ColorFormat.ARGB8888
);
}
offs += 64;
}
}
break;
case ImageFormat.A8:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
Data[offs + pos],
255,
255,
255,
ColorFormat.ARGB8888
);
}
offs += 64;
}
}
break;
case ImageFormat.LA4:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
(byte)((Data[offs + pos] & 0xF) * 0x11),
(byte)((Data[offs + pos] >> 4) * 0x11),
(byte)((Data[offs + pos] >> 4) * 0x11),
(byte)((Data[offs + pos] >> 4) * 0x11),
ColorFormat.ARGB8888
);
}
offs += 64;
}
}
break;
case ImageFormat.L4:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
int shift = (pos & 1) * 4;
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
(byte)(((Data[offs + pos / 2] >> shift) & 0xF) * 0x11),
(byte)(((Data[offs + pos / 2] >> shift) & 0xF) * 0x11),
(byte)(((Data[offs + pos / 2] >> shift) & 0xF) * 0x11),
ColorFormat.ARGB8888
);
}
offs += 64 / 2;
}
}
break;
case ImageFormat.A4:
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 64; i++)
{
int x2 = i % 8;
if (x + x2 >= physicalwidth)
{
continue;
}
int y2 = i / 8;
if (y + y2 >= physicalheight)
{
continue;
}
int pos = TileOrder[x2 % 4 + y2 % 4 * 4] + 16 * (x2 / 4) + 32 * (y2 / 4);
int shift = (pos & 1) * 4;
res[(y + y2) * stride + x + x2] = GFXUtil.ToColorFormat(
(byte)(((Data[offs + pos / 2] >> shift) & 0xF) * 0x11),
255,
255,
255,
ColorFormat.ARGB8888
);
}
offs += 64 / 2;
}
}
break;
case ImageFormat.ETC1: //Some reference: http://www.khronos.org/registry/gles/extensions/OES/OES_compressed_ETC1_RGB8_texture.txt
case ImageFormat.ETC1A4:
{
for (int y = 0; y < Height; y += 8)
{
for (int x = 0; x < Width; x += 8)
{
for (int i = 0; i < 8; i += 4)
{
for (int j = 0; j < 8; j += 4)
{
ulong alpha = 0xFFFFFFFFFFFFFFFF;
if (Format == ImageFormat.ETC1A4)
{
alpha = IOUtil.ReadU64LE(Data, offs);
offs += 8;
}
ulong data = IOUtil.ReadU64LE(Data, offs);
bool diffbit = ((data >> 33) & 1) == 1;
bool flipbit = ((data >> 32) & 1) == 1; //0: |||, 1: |-|
int r1, r2, g1, g2, b1, b2;
if (diffbit) //'differential' mode
{
int r = (int)((data >> 59) & 0x1F);
int g = (int)((data >> 51) & 0x1F);
int b = (int)((data >> 43) & 0x1F);
r1 = (r << 3) | ((r & 0x1C) >> 2);
g1 = (g << 3) | ((g & 0x1C) >> 2);
b1 = (b << 3) | ((b & 0x1C) >> 2);
r += (int)((data >> 56) & 0x7) << 29 >> 29;
g += (int)((data >> 48) & 0x7) << 29 >> 29;
b += (int)((data >> 40) & 0x7) << 29 >> 29;
r2 = (r << 3) | ((r & 0x1C) >> 2);
g2 = (g << 3) | ((g & 0x1C) >> 2);
b2 = (b << 3) | ((b & 0x1C) >> 2);
}
else //'individual' mode
{
r1 = (int)((data >> 60) & 0xF) * 0x11;
g1 = (int)((data >> 52) & 0xF) * 0x11;
b1 = (int)((data >> 44) & 0xF) * 0x11;
r2 = (int)((data >> 56) & 0xF) * 0x11;
g2 = (int)((data >> 48) & 0xF) * 0x11;
b2 = (int)((data >> 40) & 0xF) * 0x11;
}
int Table1 = (int)((data >> 37) & 0x7);
int Table2 = (int)((data >> 34) & 0x7);
for (int y3 = 0; y3 < 4; y3++)
{
for (int x3 = 0; x3 < 4; x3++)
{
if (x + j + x3 >= physicalwidth)
{
continue;
}
if (y + i + y3 >= physicalheight)
{
continue;
}
int val = (int)((data >> (x3 * 4 + y3)) & 0x1);
bool neg = ((data >> (x3 * 4 + y3 + 16)) & 0x1) == 1;
uint c;
if ((flipbit && y3 < 2) || (!flipbit && x3 < 2))
{
int add = ETC1Modifiers[Table1, val] * (neg ? -1 : 1);
c = GFXUtil.ToColorFormat((byte)(((alpha >> ((x3 * 4 + y3) * 4)) & 0xF) * 0x11), (byte)ColorClamp(r1 + add), (byte)ColorClamp(g1 + add), (byte)ColorClamp(b1 + add), ColorFormat.ARGB8888);
}
else
{
int add = ETC1Modifiers[Table2, val] * (neg ? -1 : 1);
c = GFXUtil.ToColorFormat((byte)(((alpha >> ((x3 * 4 + y3) * 4)) & 0xF) * 0x11), (byte)ColorClamp(r2 + add), (byte)ColorClamp(g2 + add), (byte)ColorClamp(b2 + add), ColorFormat.ARGB8888);
}
res[(i + y3) * stride + x + j + x3] = c;
}
}
offs += 8;
}
}
}
res += stride * 8;
}
}
break;
}
bitm.UnlockBits(d);
return(bitm);
}