Stream BlendEntry(ArcFile arc, VirtualCharEntry entry)
{
using (var base_png = OpenEntry(arc, arc.Dir.First()))
using (var overlay_png = OpenEntry(arc, entry.Source))
{
var decoder = new PngBitmapDecoder(base_png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var base_frame = decoder.Frames[0];
decoder = new PngBitmapDecoder(overlay_png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var overlay_frame = decoder.Frames[0];
int overlay_x = entry.Source.OffsetX;
int overlay_y = entry.Source.OffsetY;
var visual = new DrawingVisual();
using (var context = visual.RenderOpen())
{
context.DrawImage(base_frame, new Rect(0, 0, base_frame.PixelWidth, base_frame.PixelHeight));
context.DrawImage(overlay_frame, new Rect(overlay_x, overlay_y, overlay_frame.PixelWidth, overlay_frame.PixelHeight));
}
var bmp = new RenderTargetBitmap(base_frame.PixelWidth, base_frame.PixelHeight,
base_frame.DpiX, base_frame.DpiY, PixelFormats.Pbgra32);
bmp.Render(visual);
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
var mem = new MemoryStream();
encoder.Save(mem);
mem.Position = 0;
return(mem);
}
}
public override ArcFile TryOpen(ArcView file)
{
uint index_offset = file.View.ReadUInt32(4);
int count = file.View.ReadInt32(index_offset) + 1;
if (!IsSaneCount(count))
{
return(null);
}
string base_name = Path.GetFileNameWithoutExtension(file.Name);
var dir = new List <Entry> (count);
dir.Add(new Entry {
Name = string.Format("{0}#0.png", base_name),
Type = "image", Offset = 8, Size = index_offset - 8
});
index_offset += 4;
for (int i = 1; i < count; ++i)
{
uint name_length = file.View.ReadByte(index_offset++);
var name = file.View.ReadString(index_offset, name_length);
uint size = file.View.ReadUInt32(index_offset + name_length);
index_offset += name_length + 4;
if (size > 8)
{
var entry = new CharEntry
{
Name = string.Format("{0}#{1}.png", base_name, name),
Type = "image",
Offset = index_offset + 8,
Size = size - 8,
OffsetX = file.View.ReadInt16(index_offset),
OffsetY = file.View.ReadInt16(index_offset + 2),
//Width = file.View.ReadUInt16 (index_offset+4),
//Height = file.View.ReadUInt16 (index_offset+6),
};
dir.Add(entry);
var virt_entry = new VirtualCharEntry {
Name = string.Format("{0}#blend#{1}.png", base_name, name),
Type = "image",
Source = entry,
Offset = 0,
};
dir.Add(virt_entry);
}
index_offset += size;
}
return(new ArcFile(file, this, dir));
}