//public static APNG AssembleAPNG(IList<string> files, bool optimize) {
// if(files.Count < 1) {
// return null;
// }
// uint sequenceCount = 0;
// APNG apng = new APNG();
// PNG first = new PNG();
// using(Stream s = File.OpenRead(files.First())) {
// first.Load(s);
// }
// SetupAPNGChunks(apng, first);
// Frame firstFrame = CreateFrame(first.Height, first.Width, 0, 0, ref sequenceCount, true, first.IDATList);
// apng.AddFrame(firstFrame);
// foreach(string file in files.Skip(1)) {
// Point p = new Point(0, 0);
// PNG png = new PNG();
// using(Stream fileStr = File.OpenRead(file)) {
// if(optimize) {
// using(Stream optStr = OptimizeBitmapStream(fileStr, out p)) {
// png.Load(optStr);
// }
// } else {
// png.Load(fileStr);
// }
// }
// Frame f = CreateFrame(png.Height, png.Width, (uint)p.X, (uint)p.Y, ref sequenceCount, false, png.IDATList);
// apng.AddFrame(f);
// }
// apng.acTL.NumFrames = (uint)apng.FrameCount;
// apng.Validate();
// return apng;
//}
//public static APNG AssembleAPNG(IList<FileInfo> files, bool optimize) {
// IList<string> filenames = new List<string>();
// foreach(FileInfo fi in files) {
// filenames.Add(fi.FullName);
// }
// return AssembleAPNG(filenames, optimize);
//}
private static Frame CreateFrame(int fps, uint h, uint w, uint xoff, uint yoff, ref uint seq, bool first, IList <IDATChunk> idats)
{
fcTLChunk fctl = new fcTLChunk()
{
DelayNumerator = 1,
DelayDenominator = (ushort)fps,
Height = h,
Width = w,
DisposeOperation = 1,
BlendOperation = 0,
XOffset = xoff,
YOffset = yoff,
SequenceNumber = seq++
};
Frame f = new Frame(first, fctl);
foreach (IDATChunk idat in idats)
{
if (first)
{
f.AddChunk(idat);
}
else
{
fdATChunk fdat = new fdATChunk()
{
FrameData = idat.ImageData,
SequenceNumber = seq++
};
f.AddChunk(fdat);
}
}
return(f);
}
public Frame(bool first, fcTLChunk fChunk)
{
IFrame = first;
if (IFrame)
{
idats = new List <IDATChunk>();
}
else
{
fdats = new List <fdATChunk>();
}
fctl = fChunk;
}
private void Handle_fcTL(PNGChunk chunk)
{
bool IFrame = IDATList.Count < 1;
fcTLChunk fctlC = new fcTLChunk();
fctlC.ChunkData = chunk.ChunkData;
if ((fctlC.XOffset + fctlC.Width) > IHDR.Width || (fctlC.YOffset + fctlC.Height) > IHDR.Height)
{
throw new ApplicationException("Frame is outside of image space");
}
Frame f = new Frame(IFrame, fctlC);
frames.Add(f);
}