public static string[] Run(Stream stream, string hg3File, string outputDir,
string fileName, bool expand)
{
BinaryReader reader = new BinaryReader(stream);
HG3HDR hdr = reader.ReadStruct <HG3HDR>();
if (hdr.Signature != "HG-3")
{
throw new InvalidFileException(Path.GetFileName(hg3File), "HG3");
}
List <string> files = new List <string>();
int backtrack = Marshal.SizeOf <HG3TAG>() - 1;
for (int i = 0; true; i++)
{
HG3TAG tag = reader.ReadStruct <HG3TAG>();
// NEW METHOD: Keep searching for the next stdinfo
// This way we don't miss any images
while (!tag.Signature.StartsWith("stdinfo"))
{
if (stream.IsEndOfStream())
{
break;
}
stream.Position -= backtrack;
tag = reader.ReadStruct <HG3TAG>();
}
if (stream.IsEndOfStream())
{
break;
}
// OLD METHOD: Missed entries in a few files
//if (!tag.signature.StartsWith(StdInfoSignature))
// break;
HG3STDINFO stdInfo = reader.ReadStruct <HG3STDINFO>();
int imgIndex = 0;
while (tag.OffsetNext != 0)
{
tag = reader.ReadStruct <HG3TAG>();
string pngFile = Path.Combine(outputDir, MakeFileName(
fileName, i > 0 || hdr.EntryCount > 0, i, imgIndex++));
/*if (tag.Signature.StartsWith("img_al")) {
* // Skip this tag
* stream.Position += tag.Length;
* HG3IMGAL imghdr = reader.ReadStruct<HG3IMGAL>();
*
* int length = imghdr.length;
* byte[] buffer = reader.ReadBytes(length);
*
* int outLength = imghdr.original_length;
* byte[] outBuffer = reader.ReadBytes(outLength);
*
* Uncompress(outBuffer, ref outLength, buffer, length);
*
* files.Add(pngFile);
* WritePng(pngFile,
* outBuffer,
* stdInfo.width,
* stdInfo.height,
* 1,
* true);
* }
* else if (tag.Signature.StartsWith("img_jpg")) {
* // Skip this tag
* stream.Position += tag.Length;
* }
* else if (tag.Signature == "imgmode") {
* // Skip this tag
* stream.Position += tag.Length;
* }
* else */if (Regex.IsMatch(tag.Signature, @"img\d+"))
{
HG3IMG imghdr = reader.ReadStruct <HG3IMG>();
files.Add(pngFile);
ProcessImage(reader,
pngFile,
stdInfo,
imghdr,
expand);
/*stdInfo.Width,
* stdInfo.Height,
* stdInfo.DepthBits / 8,
* stdInfo.TotalWidth,
* stdInfo.TotalHeight,
* stdInfo.OffsetX,
* stdInfo.OffsetY,
* imghdr.DataLength,
* imghdr.OriginalDataLength,
* imghdr.CmdLength,
* imghdr.OriginalCmdLength);*/
}
else
{
// Skip this tag
stream.Position += tag.Length;
}
}
stream.Position += 8;
}
return(files.ToArray());
}
private static Hg3 Extract(Stream stream, string fileName, string directory, bool saveFrames, bool expand)
{
BinaryReader reader = new BinaryReader(stream);
HG3HDR hdr = reader.ReadUnmanaged <HG3HDR>();
if (hdr.Signature != "HG-3")
{
throw new UnexpectedFileTypeException(fileName, "HG-3");
}
//int backtrack = Marshal.SizeOf<HG3TAG>() - 1;
List <KeyValuePair <HG3STDINFO, List <long> > > imageOffsets = new List <KeyValuePair <HG3STDINFO, List <long> > >();
for (int i = 0; ; i++)
{
// NEW-NEW METHOD: We now know the next offset ahead
// of time from the HG3OFFSET we're going to read.
// Usually skips 0 bytes, otherwise usually 1-7 bytes.
long startPosition = stream.Position;
HG3OFFSET offset = reader.ReadUnmanaged <HG3OFFSET>();
HG3TAG tag = reader.ReadUnmanaged <HG3TAG>();
if (!HG3STDINFO.HasTagSignature(tag.Signature))
{
throw new Exception("Expected \"stdinfo\" tag!");
}
// NEW METHOD: Keep searching for the next stdinfo
// This way we don't miss any images
/*int offset = 0;
* while (!tag.Signature.StartsWith("stdinfo")) {
* if (stream.IsEndOfStream())
* break;
* stream.Position -= backtrack;
* tag = reader.ReadStruct<HG3TAG>();
* offset++;
* }
* if (stream.IsEndOfStream())
* break;*/
// OLD METHOD: Missed entries in a few files
//if (!tag.signature.StartsWith(StdInfoSignature))
// break;
HG3STDINFO stdInfo = reader.ReadUnmanaged <HG3STDINFO>();
List <long> frameOffsets = new List <long>();
imageOffsets.Add(new KeyValuePair <HG3STDINFO, List <long> >(stdInfo, frameOffsets));
while (tag.OffsetNext != 0)
{
tag = reader.ReadUnmanaged <HG3TAG>();
string signature = tag.Signature;
if (HG3IMG.HasTagSignature(signature)) // "img####"
{
frameOffsets.Add(stream.Position);
// Skip this tag
stream.Position += tag.Length;
}
/*else if (HG3ATS.HasTagSignature(signature)) { // "ats####"
* // Skip this tag
* stream.Position += tag.Length;
* }
* else if (HG3CPTYPE.HasTagSignature(signature)) { // "cptype"
* // Skip this tag
* stream.Position += tag.Length;
* }
* else if (HG3IMG_AL.HasTagSignature(signature)) { // "img_al"
* // Skip this tag
* stream.Position += tag.Length;
* }
* else if (HG3IMG_JPG.HasTagSignature(signature)) { // "img_jpg"
* // Skip this tag
* stream.Position += tag.Length;
* }
* else if (HG3IMGMODE.HasTagSignature(signature)) { // "imgmode"
* // Skip this tag
* stream.Position += tag.Length;
* }*/
else
{
// Skip this unknown tag
stream.Position += tag.Length;
}
}
if (offset.OffsetNext == 0)
{
break; // End of stream
}
stream.Position = startPosition + offset.OffsetNext;
}
HG3STDINFO[] stdInfos = imageOffsets.Select(p => p.Key).ToArray();
long[][] allFrameOffsets = imageOffsets.Select(p => p.Value.ToArray()).ToArray();
Hg3 hg3 = new Hg3(Path.GetFileName(fileName), hdr, stdInfos, allFrameOffsets, saveFrames && expand);
// Save any frames after we've located them all.
// This way we truely know if something is an animation.
if (saveFrames)
{
for (int imgIndex = 0; imgIndex < hg3.Count; imgIndex++)
{
HG3STDINFO stdInfo = stdInfos[imgIndex];
Hg3Image hg3Image = hg3.Images[imgIndex];
for (int frmIndex = 0; frmIndex < hg3Image.FrameCount; frmIndex++)
{
stream.Position = hg3Image.FrameOffsets[frmIndex];
HG3IMG imghdr = reader.ReadUnmanaged <HG3IMG>();
string pngFile = hg3.GetFrameFilePath(directory, imgIndex, frmIndex);
ExtractBitmap(reader, stdInfo, imghdr, expand, pngFile);
}
}
}
return(hg3);
}