internal static RiffChunkList Parse(BinaryReader reader, long endPosition)
{
var listType = reader.ReadFourCc();
var chunks = new List <RiffChunk>();
while (reader.BaseStream.Position < endPosition)
{
chunks.Add(RiffChunk.Parse(reader));
}
return(new RiffChunkList
{
ListType = listType,
Chunks = chunks.ToArray()
});
}
private static RiffChunk FindChunkRecursive(RiffChunk chunk, string chunkType)
{
if (chunk.ChunkType == chunkType)
{
return(chunk);
}
if (chunk.Content is RiffChunkList list)
{
foreach (var subchunk in list.Chunks)
{
var result = FindChunkRecursive(subchunk, chunkType);
if (result != null)
{
return(result);
}
}
}
return(null);
}
public static AniFile FromFileSystemEntry(FileSystemEntry entry)
{
RiffChunk rootChunk;
using (var stream = entry.Open())
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
rootChunk = RiffChunk.Parse(reader);
}
var result = new AniFile();
foreach (var chunk in ((RiffChunkList)rootChunk.Content).Chunks)
{
switch (chunk.Content)
{
case RiffChunkList list:
switch (list.ListType)
{
case "INFO":
var iconNameChunk = list.Chunks.FirstOrDefault(x => x.ChunkType == "INAM");
if (iconNameChunk != null)
{
result.IconName = ((InfoChunkContent)iconNameChunk.Content).Value;
}
var iconArtistChunk = list.Chunks.FirstOrDefault(x => x.ChunkType == "IART");
if (iconArtistChunk != null)
{
result.ArtistName = ((InfoChunkContent)iconArtistChunk.Content).Value;
}
break;
case "fram":
var iconIndex = 0;
foreach (var iconChunk in list.Chunks)
{
if (iconChunk.ChunkType != "icon")
{
throw new InvalidDataException();
}
var iconChunkContent = (IconChunkContent)iconChunk.Content;
result.Images[iconIndex++] = iconChunkContent.GetImage(0);
}
break;
}
break;
case AniHeaderChunkContent anih:
result.Images = new CursorImage[anih.NumFrames];
result.DefaultFrameDisplayRate = anih.DefaultFrameDisplayRate;
break;
case RateChunkContent rate:
result.Rates = rate;
break;
case SequenceChunkContent seq:
result.Sequence = seq;
break;
default:
throw new InvalidDataException();
}
}
return(result);
}
public static AniFile FromFileSystemEntry(FileSystemEntry entry)
{
RiffChunk rootChunk;
using (var stream = entry.Open())
using (var reader = new BinaryReader(stream, Encoding.ASCII, true))
{
rootChunk = RiffChunk.Parse(reader);
}
var result = new AniFile();
foreach (var chunk in ((RiffChunkList)rootChunk.Content).Chunks)
{
switch (chunk.Content)
{
case RiffChunkList list:
switch (list.ListType)
{
case "INFO":
var iconNameChunk = list.Chunks.FirstOrDefault(x => x.ChunkType == "INAM");
if (iconNameChunk != null)
{
result.IconName = ((InfoChunkContent)iconNameChunk.Content).Value;
}
var iconArtistChunk = list.Chunks.FirstOrDefault(x => x.ChunkType == "IART");
if (iconArtistChunk != null)
{
result.ArtistName = ((InfoChunkContent)iconArtistChunk.Content).Value;
}
break;
case "fram":
var iconIndex = 0;
foreach (var iconChunk in list.Chunks)
{
if (iconChunk.ChunkType != "icon")
{
throw new InvalidDataException();
}
var iconChunkContent = (IconChunkContent)iconChunk.Content;
var iconDirEntry = iconChunkContent.IconDirEntries[0];
if (result.IconWidth == 0)
{
result.IconWidth = iconDirEntry.Width;
result.IconHeight = iconDirEntry.Height;
result.HotspotX = iconDirEntry.HotspotX;
result.HotspotY = iconDirEntry.HotspotY;
}
else
{
if (result.IconWidth != iconDirEntry.Width || result.IconHeight != iconDirEntry.Height)
{
throw new InvalidDataException();
}
}
var icon = iconChunkContent.Images[0];
var pixels = new byte[result.IconWidth * result.IconHeight * 4];
var index = 0;
for (var y = 0; y < result.IconHeight; y++)
{
for (var x = 0; x < result.IconWidth; x++)
{
var pixelIndex = (y * result.IconWidth) + x;
var isTransparent = icon.AndMask.Pixels[pixelIndex] == 1;
var color = icon.ColorTable.Entries[icon.XorMask.Pixels[pixelIndex]];
pixels[index++] = color.Blue;
pixels[index++] = color.Green;
pixels[index++] = color.Red;
pixels[index++] = isTransparent ? (byte)0 : (byte)255;
}
}
result.Images[iconIndex] = new AniCursorImage(pixels);
iconIndex++;
}
break;
}
break;
case AniHeaderChunkContent anih:
result.Images = new AniCursorImage[anih.NumFrames];
result.DefaultFrameDisplayRate = anih.DefaultFrameDisplayRate;
break;
case RateChunkContent rate:
result.Rates = rate;
break;
case SequenceChunkContent seq:
result.Sequence = seq;
break;
default:
throw new InvalidDataException();
}
}
return(result);
}
