private static MagickImage Decode(AwesomeReader ar, ImageEncoding encoding, uint bpp, uint mipmap, uint width, uint height, uint bpl, bool ps2Texture = false)
{
// Image starts at bottom left corner
switch (encoding)
{
case ImageEncoding.BMP:
return(DecodeBMP(ar, bpp, width, height, bpl));
case ImageEncoding.DXT1:
return(bpp == 8
? DecodeBMP(ar, bpp, width, height, bpl, false)
: DecodeDXT(ar, bpp, width, height, encoding));
case ImageEncoding.DXT5:
case ImageEncoding.ATI2:
return(DecodeDXT(ar, bpp, width, height, encoding));
}
return(null);
}
public static Matrix FromStream(AwesomeReader ar)
{
// Reads from stream, usually embedded inside milo directories and mesh files
Matrix mat = new Matrix();
mat.M11 = ar.ReadSingle(); // M11
mat.M12 = ar.ReadSingle(); // M12
mat.M13 = ar.ReadSingle(); // M13
mat.M21 = ar.ReadSingle(); // M21
mat.M22 = ar.ReadSingle(); // M22
mat.M23 = ar.ReadSingle(); // M23
mat.M31 = ar.ReadSingle(); // M31
mat.M32 = ar.ReadSingle(); // M32
mat.M33 = ar.ReadSingle(); // M33
mat.M41 = ar.ReadSingle(); // M41
mat.M42 = ar.ReadSingle(); // M42
mat.M43 = ar.ReadSingle(); // M43
mat.M44 = 1.0f; // M44 - Implicit
return(mat);
}
public static HMXImage FromStream(Stream input)
{
/* Header size = 32 bytes
* ======================
* BYTE - Always 1
* BYTE - Bits Per Pixel - Can be 4, 8, 24, or 32 (But usually either 4 or 8)
* INT32 - Image Format/Encoding
* BYTE - MipMaps count
* INT16 - Width
* INT16 - Height
* INT16 - Bytes Per Line
* BYTES - 19 bytes of zero'd data
*/
/* Header size = 16 bytes
* ======================
* BYTE - Always 0
* BYTE - Bits Per Pixel - Can be 4, 8, 24, or 32 (But usually either 4 or 8)
* BYTE - Always 0 (Image Format/Encoding)
* BYTE - Awlays 0 MipMaps count
* INT16 - Width
* INT16 - Height
* INT16 - Bytes Per Line
* BYTES - 6 bytes of zero'd data
*/
if (input.Position == input.Length)
{
return(null); // End of stream;
}
using (AwesomeReader ar = new AwesomeReader(input))
{
ImageEncoding encoding;
bool valid;
uint bpp, width, height, bpl, mipmap;
byte firstByte = ar.ReadByte();
if (firstByte != 0 && firstByte != 1)
{
return(null);
}
bpp = ar.ReadByte();
switch (bpp)
{
case 4:
case 8:
case 24:
case 32:
break;
default:
return(null); // Probably should do something else
}
if (firstByte == 1)
{
// Guesses endianess
ar.BigEndian = DetermineEndianess(ar.ReadBytes(4), out encoding, out valid);
if (!valid)
{
return(null); // Maybe do something else later
}
// Reads rest of header
mipmap = ar.ReadByte(); // Mipmap count
}
else
{
// Xbox OG texture
encoding = ImageEncoding.BMP;
ar.BaseStream.Position += 2;
mipmap = 0;
}
width = ar.ReadUInt16();
height = ar.ReadUInt16();
bpl = ar.ReadUInt16();
ar.BaseStream.Position += (firstByte == 1) ? 19 : 6;
// Decodes image
var magic = Decode(ar, encoding, bpp, mipmap, width, height, bpl, firstByte == 1);
HMXImage image = new HMXImage(magic);
image.Encoding = encoding;
image.BigEndian = ar.BigEndian;
return(image);
}
}
private static MagickImage DecodeDXT(AwesomeReader ar, uint bpp, uint width, uint height, ImageEncoding encoding, bool x360 = true)
{
uint imageSize;
string compression;
switch (encoding)
{
default:
case ImageEncoding.DXT1:
imageSize = (width * height) / 2; // 4bpp
compression = "DXT1";
break;
case ImageEncoding.DXT5:
imageSize = width * height; // 8bpp
compression = "DXT5";
break;
case ImageEncoding.ATI2:
imageSize = width * height; // 8bpp
compression = "ATI2";
break;
}
if (encoding == ImageEncoding.DXT1)
{
const int PIXELS_PER_BLOCK = 16;
int blockSize = (PIXELS_PER_BLOCK * (int)bpp) / 8;
byte[] data = ar.ReadBytes((int)imageSize);
if (x360)
{
SwapBytes(data);
}
Color FromRGB565(int c) => Color.FromArgb(
0xFF,
(c & 0b1111_1000_0000_0000) >> 8,
(c & 0b0000_0111_1110_0000) >> 3,
(c & 0b0000_0000_0001_1111) << 3);
Color MultiplyColor(Color c, float mult) => Color.FromArgb(
(int)(c.A * mult),
(int)(c.R * mult),
(int)(c.G * mult),
(int)(c.B * mult));
Color AddColors(Color a, Color b) => Color.FromArgb(
a.A + b.A,
a.R + b.R,
a.G + b.G,
a.B + b.B);
int idx = 0;
var colors = new Color[4];
var pixels = new Color[16];
int w, h;
var imageBytes = new byte[width * height * 4]; // 32-bit color
for (int y = 0; y < (height >> 2); y++)
{
for (int x = 0; x < (width >> 2); x++)
{
// Colors - 4 bytes
colors[0] = FromRGB565(data[idx] | data[idx + 1] << 8);
colors[1] = FromRGB565(data[idx + 2] | data[idx + 3] << 8);
colors[2] = AddColors(MultiplyColor(colors[0], 0.66f), MultiplyColor(colors[1], 0.33f));
colors[3] = AddColors(MultiplyColor(colors[0], 0.33f), MultiplyColor(colors[1], 0.66f));
//colors[2] = AddColors(MultiplyColor(colors[0], 0.5f), MultiplyColor(colors[1], 0.5f));
//colors[3] = Color.FromArgb(0);
// Indices - 4 bytes (16 pixels)
pixels[0] = colors[(data[idx + 4] & 0b00_00_00_11)]; // Row 1