public void parse(iRiffChunk chunk)
{
if (chunk.parentTag == ACON && chunk.tag == ANIH)
{
header = chunk.read <ANIHeader>();
if (header.cbSizeOf != Marshal.SizeOf <ANIHeader>())
{
throw new ArgumentException("ANI header has wrong size");
}
frames = new Frame[header.cFrames];
return;
}
if (chunk.parentTag == FRAM && chunk.tag == ICON)
{
if (null == frames)
{
throw new ArgumentException("ANI header not found");
}
if (chunk.index >= frames.Length)
{
throw new ArgumentException("Too many frames in the ANI");
}
frames[chunk.index] = new Frame(chunk);
parsedFrames = chunk.index + 1;
return;
}
}
/// <summary>Parse stream with *.ani file, extract all the metadata.</summary>
public AniFile(Stream stream)
{
Parser p = new Parser();
RiffParser.parse(stream, p.parse);
if (null == p.frames || p.parsedFrames != p.frames.Length)
{
throw new ArgumentException("The stream is not an animated cursor file");
}
header = p.header;
frames = p.frames;
if (frames.Length <= 0)
{
throw new ArgumentException("The animated cursor doesn’t have any frames");
}
ICONDIRECTORY[] images = frames[0].images;
formats = new ImageFormat[images.Length];
Span <ulong> vals = stackalloc ulong[images.Length];
Span <uint> bmpFormats = stackalloc uint[images.Length];
for (int i = 0; i < images.Length; i++)
{
uint bmp = frames[0].payloads[i].BitmapHeaderSize;
vals[i] = headerValues(ref images[i]);
formats[i] = new ImageFormat(ref images[i], bmp);
bmpFormats[i] = bmp;
}
for (int i = 1; i < frames.Length; i++)
{
images = frames[i].images;
for (int j = 0; j < vals.Length; j++)
{
ulong vv = headerValues(ref images[j]);
uint bmp = frames[i].payloads[j].BitmapHeaderSize;
if (vv != vals[j] || bmp != bmpFormats[j])
{
throw new ArgumentException("Different frames of the animation use different image format, this is not supported");
}
}
}
}
