public Model(Stream stream, string path)
{
base._data = Data = new GifFormat(this, stream, path);
// Arbitrary sanity limit.
if (Data.FileSize > 50000000)
{
IssueModel.Add("File size insanely huge", Severity.Fatal);
return;
}
Data.fBuf = new byte[(int)Data.FileSize];
stream.Position = 0;
int got = stream.Read(Data.fBuf, 0, (int)Data.FileSize);
if (got < Data.FileSize)
{
IssueModel.Add("Read failed.", Severity.Fatal);
return;
}
Data.Version = Data.fBuf[4] == '7'? "87a" : "89a";
Data.Width = ConvertTo.FromLit16ToInt32(Data.fBuf, 6);
Data.Height = ConvertTo.FromLit16ToInt32(Data.fBuf, 8);
}
public Model(Stream stream, string path)
{
base._data = Data = new IcoFormat(this, stream, path);
// Arbitrary sanity limit.
if (Data.FileSize > 50000000)
{
IssueModel.Add("File insanely large", Severity.Fatal);
return;
}
var buf = new byte[Data.FileSize];
stream.Position = 0;
var got = stream.Read(buf, 0, (int)Data.FileSize);
if (got != Data.FileSize)
{
IssueModel.Add("Read error", Severity.Fatal);
return;
}
int headerCount = ConvertTo.FromLit16ToInt32(buf, 4);
if (headerCount <= 0)
{
IssueModel.Add("Corrupt header count", Severity.Fatal);
return;
}
int pos = 6;
int stop = pos + 16 * headerCount;
int actualStart = stop;
for (pos = 6; pos < stop; pos += 16)
{
int width, height, bpp, paletteSize;
int storedSize = ConvertTo.FromLit32ToInt32(buf, pos + 8);
int storedStart = ConvertTo.FromLit32ToInt32(buf, pos + 12);
if (storedStart != actualStart || storedSize <= 0)
{
IssueModel.Add($"Corrupt header near byte {Data.ValidSize}", Severity.Fatal);
return;
}
bool isPNG = buf[actualStart] == 0x89 && buf[actualStart + 1] == 'P' && buf[actualStart + 2] == 'N' && buf[actualStart + 3] == 'G';
if (isPNG)
{
width = ConvertTo.FromBig32ToInt32(buf, actualStart + 16);
height = ConvertTo.FromBig32ToInt32(buf, actualStart + 20);
paletteSize = 0;
bpp = buf[actualStart + 24];
}
else
{
width = buf[pos];
if (width == 0)
{
width = 256;
}
height = buf[pos + 1];
if (height == 0)
{
height = 256;
}
paletteSize = buf[pos + 2];
bpp = buf[pos + 6];
}
Data.icons.Add(new IconItem(width, height, paletteSize, bpp, storedStart, storedSize, isPNG));
actualStart += storedSize;
}
if (actualStart != Data.FileSize)
{
IssueModel.Add("Incorrect file size");
return;
}
}
