private static MemoryStream BLP2toDXT1(byte[] blp2)
{
MemoryStream dxt1;
using (var src = new MemoryStream(blp2))
{
using (var bsrc = new BinaryReader(src))
{
BLP2_HEADER header;
header.ident = bsrc.ReadBytes(4);
header.compress = bsrc.ReadInt32();
header.flags = bsrc.ReadBytes(4);
header.width = bsrc.ReadInt32();
header.height = bsrc.ReadInt32();
header.mipmapOffsets = new int[16];
for (int i = 0; i < 16; i++)
header.mipmapOffsets[i] = bsrc.ReadInt32();
header.mipmapLengths = new int[16];
for (int i = 0; i < 16; i++)
header.mipmapLengths[i] = bsrc.ReadInt32();
int nPixels = header.width * header.height;
if (header.compress == 1)
{
RGBA_PIXEL[] pal = new RGBA_PIXEL[256];
for (int p = 0; p < 256; p++)
{
pal[p].R = bsrc.ReadByte();
pal[p].G = bsrc.ReadByte();
pal[p].B = bsrc.ReadByte();
pal[p].A = bsrc.ReadByte();
}
src.Seek(header.mipmapOffsets[0], SeekOrigin.Begin);
if (header.flags[0] == 1)
{
return null;
}
else if (header.flags[0] == 2)
{
if (header.flags[1] == 8)
{
return null;
}
else
{
// Ugly way to write the DXT1 header
dxt1 = new MemoryStream();
dxt1.WriteByte((byte)'D');
dxt1.WriteByte((byte)'D');
dxt1.WriteByte((byte)'S');
dxt1.WriteByte((byte)' ');
dxt1.WriteByte((byte)'|');
for (int i = 0; i < 3; i++) dxt1.WriteByte(0);
dxt1.WriteByte(7);
dxt1.WriteByte(0x10);
for (int i = 0; i < 3; i++) dxt1.WriteByte(0);
dxt1.WriteByte(1);
for (int i = 0; i < 3; i++) dxt1.WriteByte(0);
dxt1.WriteByte(1);
for (int i = 0; i < 58; i++) dxt1.WriteByte(0);
dxt1.WriteByte((byte)' ');
for (int i = 0; i < 3; i++) dxt1.WriteByte(0);
dxt1.WriteByte(4);
for (int i = 0; i < 3; i++) dxt1.WriteByte(0);
dxt1.WriteByte((byte)'D');
dxt1.WriteByte((byte)'X');
dxt1.WriteByte((byte)'T');
dxt1.WriteByte((byte)'1');
for (int i = 0; i < 21; i++) dxt1.WriteByte(0);
dxt1.WriteByte(0x10);
for (int i = 0; i < 18; i++) dxt1.WriteByte(0);
dxt1.Write(blp2, header.mipmapOffsets[0], header.mipmapLengths[0]);
return dxt1;
}
}
}
}
}
return null;
}
private static MemoryStream BLP2toTGA(byte[] blp2)
{
MemoryStream tga = new MemoryStream();
using (var src = new MemoryStream(blp2))
{
using (var bsrc = new BinaryReader(src))
{
BLP2_HEADER header;
header.ident = bsrc.ReadBytes(4);
header.compress = bsrc.ReadInt32();
header.flags = bsrc.ReadBytes(4);
header.width = bsrc.ReadInt32();
header.height = bsrc.ReadInt32();
header.mipmapOffsets = new int[16];
for (int i = 0; i < 16; i++)
header.mipmapOffsets[i] = bsrc.ReadInt32();
header.mipmapLengths = new int[16];
for (int i = 0; i < 16; i++)
header.mipmapLengths[i] = bsrc.ReadInt32();
int nPixels = header.width * header.height;
// Ugly way to write the tga header
tga.WriteByte(0); tga.WriteByte(0);
tga.WriteByte(2); tga.WriteByte(0);
tga.WriteByte(0); tga.WriteByte(0);
tga.WriteByte(0); tga.WriteByte(0);
tga.WriteByte(0); tga.WriteByte(0);
tga.WriteByte(0); tga.WriteByte(0);
tga.WriteByte(0); tga.WriteByte(1);
tga.WriteByte(0); tga.WriteByte(1);
tga.WriteByte(32); tga.WriteByte(8);
if (header.compress == 1)
{
RGBA_PIXEL[] pal = new RGBA_PIXEL[256];
for (int p = 0; p < 256; p++)
{
pal[p].R = bsrc.ReadByte();
pal[p].G = bsrc.ReadByte();
pal[p].B = bsrc.ReadByte();
pal[p].A = bsrc.ReadByte();
}
src.Seek(header.mipmapOffsets[0], SeekOrigin.Begin);
if (header.flags[0] == 1)
{
// Straks, volgens mij is het DXT1 formaat
}
else if (header.flags[0] == 2)
{
if (header.flags[1] == 8)
{
DecodeDDSFormat((int)DDS_Format.DDS_DXT3, src, header.width, header.height, tga);
}
else
{
DecodeDDSFormat((int)DDS_Format.DDS_DXT1, src, header.width, header.height, tga);
}
}
}
else if (header.compress == 0)
{
// This is JPEG, dunno, just output?
}
}
}
return tga;
}
