XMLNodePtr XMLDoc::Parse( Stream& source )
{
uint32_t size = source.GetSize();
mXMLSrc.resize(size + 1, 0);
source.Read(&mXMLSrc[0], size);
mXMLSrc[size] = '\0';
mDocument.parse<0>(&mXMLSrc[0]);
mRoot = std::make_shared<XMLNode>(mDocument.first_node());
return mRoot;
}
static int64 sLZ4Compress(Stream& out, Stream& in, int64 size, Gate<int64, int64> progress, bool co)
{
LZ4CompressStream outs(out);
#ifdef _MULTITHREADED
if(co)
outs.Co();
#endif
sCompressStreamCopy_(outs, in, progress, in, size);
outs.Close();
if(!out.IsError() && !outs.IsError())
return out.GetSize();
return -1;
}
static int64 sZstdDecompress(Stream& out, Stream& in, int64 size, Gate<int64, int64> progress, bool co)
{
ZstdDecompressStream ins(in);
#ifdef _MULTITHREADED
if(co)
ins.Co();
#endif
sCompressStreamCopy_(out, ins, progress, in, size);
ins.Close();
if(!out.IsError() && !ins.IsError())
return out.GetSize();
return -1;
}
int32 Chunk::FindSubChunkOffset(std::string name)
{
// Reverse the name
name = std::string(name.rbegin(), name.rend());
if (name.size() != 4)
return -1;
Stream* stream = GetStream();
uint32 matched = 0;
while (stream->GetPos() < stream->GetSize())
{
char b = stream->Read<char>();
if (b != name[matched])
matched = 0;
else
++matched;
if (matched == 4)
return stream->GetPos() - 4;
}
return -1;
}
static bool ras_decode(Bitmap& target, Stream& stream)
{
// reset stream
stream.Seek(0,Stream::START);
// streamsize - headersize
int size = stream.GetSize() - 32;
if ( size < 1 )
return false;
// read header
uint32 magic = ReadBigEndian<uint32>(stream);
uint32 width = ReadBigEndian<uint32>(stream);
uint32 height = ReadBigEndian<uint32>(stream);
uint32 bits = ReadBigEndian<uint32>(stream);
/* uint32 length = */ ReadBigEndian<uint32>(stream);
uint32 type = ReadBigEndian<uint32>(stream);
uint32 maptype = ReadBigEndian<uint32>(stream);
uint32 maplength = ReadBigEndian<uint32>(stream);
// verify header
if ( magic != 0x59a66a95 )
return false;
if ( bits != 1 && bits != 8 && bits != 24 && bits != 32 )
return false;
if ( type != 0 && type != 1 && type != 2 && type != 3 )
return false;
// create bitmap
switch ( bits )
{
case 1: target = Bitmap(width,height,PIXELFORMAT_INTENSITY8); break;
case 8: target = Bitmap(width,height,PIXELFORMAT_PALETTE8(NULL)); break;
case 24: target = Bitmap(width,height,PIXELFORMAT_RGB888); break;
case 32: target = Bitmap(width,height,PIXELFORMAT_ARGB8888); break;
default: return false;
}
// read colormap
switch ( maptype )
{
// "none" - no palette
case 0:
{
stream.Seek(maplength,Stream::CURRENT);
break;
}
// "equal rgb" -mode palette
case 1:
{
if ( bits != 8 || maplength > 768 )
return false;
const PixelFormat& pxf = target.GetPixelFormat();
Color32* palette = pxf.GetPalette();
int count = static_cast<int>(maplength / 3);
int i;
for ( i=0; i<count; ++i ) palette[i].r = ReadBigEndian<uint8>(stream);
for ( i=0; i<count; ++i ) palette[i].g = ReadBigEndian<uint8>(stream);
for ( i=0; i<count; ++i ) palette[i].b = ReadBigEndian<uint8>(stream);
for ( i=0; i<count; ++i ) palette[i].a = 0xff;
break;
}
// "raw" -mode palette
// TODO: this code has not been tested
// (couldn't find files to test with or specification)
// this is my best guess how the "raw" mode works!
case 2:
{
if ( bits != 8 || maplength > 768 )
return false;
const PixelFormat& pxf = target.GetPixelFormat();
Color32* palette = pxf.GetPalette();
int count = static_cast<int>(maplength / 3);
for ( int i=0; i<count; ++i )
{
palette[i].r = ReadBigEndian<uint8>(stream);
palette[i].g = ReadBigEndian<uint8>(stream);
palette[i].b = ReadBigEndian<uint8>(stream);
palette[i].a = 0xff;
}
}
// unknown fileformat
default: return false;
}
// decode buffer
int buffersize = stream.GetSize() - stream.GetOffset();
uint8* buffer = new uint8[buffersize];
stream.Read(buffer,buffersize);
// read image
uint8* image = target.GetImage();
int numpixel = width * height;
if ( numpixel < 1 )
return false;
switch ( bits )
{
case 1:
{
switch ( type )
{
case 0:
case 1:
case 3:
{
int ycount = static_cast<int>(height);
while ( ycount-- )
{
int bitcount = -1;
uint8 v = 0;
int xcount = static_cast<int>(width);
while ( xcount-- )
{
if ( bitcount < 0 )
{
bitcount = 7;
v = *buffer++;
}
*image++ = (v >> (bitcount--)) & 1 ? 0 : 255;
}
}
break;
}
case 2:
{
// TODO: RLE decoder
// TODO: special handling of 1 bit stream
break;
}
}
break;
}
case 8:
{
switch ( type )
{
case 0:
case 1:
case 3:
{
memcpy(image,buffer,numpixel);
break;
}
case 2:
{
// TODO: RLE decoder
// TODO: RGB/BGR fix
// TODO: test rasrle()
rasrle(image,buffer,numpixel);
break;
}
}
break;
}
case 24:
{
switch ( type )
{
case 0:
case 1:
{
memcpy(image,buffer,numpixel*3);
break;
}
case 2:
{
// TODO: RLE decoder
// TODO: RGB/BGR fix
// TODO: test rasrle()
rasrle(image,buffer,numpixel*3);
break;
}
case 3:
{
while ( numpixel-- )
{
image[0] = buffer[2];
image[1] = buffer[1];
image[2] = buffer[0];
buffer += 3;
image += 3;
}
break;
}
}
break;
}
case 32:
{
switch ( type )
{
case 0:
case 1:
{
while ( numpixel-- )
{
image[0] = buffer[1];
image[1] = buffer[2];
image[2] = buffer[3];
image[3] = buffer[0];
buffer += 4;
image += 4;
}
break;
}
case 2:
{
// TODO: RLE decoder
// TODO: RGB/BGR fix
// TODO: test rasrle()
rasrle(image,buffer,numpixel*4);
break;
}
case 3:
{
while ( numpixel-- )
{
image[0] = buffer[3];
image[1] = buffer[2];
image[2] = buffer[1];
image[3] = buffer[0];
buffer += 4;
image += 4;
}
break;
}
}
break;
}
}
// free decode buffer
delete[] buffer;
return true;
}
