IarImage CombineLayers(IarImage layers, IarArchive iarc)
{
layers.Info.Stride = (int)layers.Info.Width * 4;
layers.Info.BPP = 32;
var pixels = new byte[layers.Info.Stride * (int)layers.Info.Height];
var output = new IarImage(layers.Info, pixels);
using (var mem = new MemoryStream(layers.Data))
using (var input = new BinaryReader(mem))
{
int offset_x = 0, offset_y = 0;
var dir = (List <Entry>)iarc.Dir;
while (input.BaseStream.Position < input.BaseStream.Length)
{
int cmd = input.ReadByte();
switch (cmd)
{
case 0x21:
offset_x += input.ReadInt16();
offset_y += input.ReadInt16();
break;
case 0x00:
case 0x20:
{
int index = input.ReadInt32();
if (index < 0 || index >= dir.Count)
{
throw new InvalidFormatException("Invalid image layer index");
}
var layer = new IarImage(iarc, dir[index]);
layer.Info.OffsetX -= offset_x;
layer.Info.OffsetY -= offset_y;
if (0x20 == cmd)
{
output.ApplyMask(layer);
}
else
{
output.Blend(layer);
}
}
break;
default:
Trace.WriteLine(string.Format("Unknown layer type 0x{0:X2}", cmd), "IAR");
break;
}
}
return(output);
}
}
IarImage CombineLayers(IarImage layers, IarArchive iarc)
{
layers.Info.Stride = (int)layers.Info.Width * 4;
layers.Info.BPP = 32;
var pixels = new byte[layers.Info.Stride * (int)layers.Info.Height];
var output = new IarImage (layers.Info, pixels);
using (var mem = new MemoryStream (layers.Data))
using (var input = new BinaryReader (mem))
{
int offset_x = 0, offset_y = 0;
var dir = (List<Entry>)iarc.Dir;
while (input.BaseStream.Position < input.BaseStream.Length)
{
int cmd = input.ReadByte();
switch (cmd)
{
case 0x21:
offset_x += input.ReadInt16();
offset_y += input.ReadInt16();
break;
case 0x00:
case 0x20:
{
int index = input.ReadInt32();
if (index < 0 || index >= dir.Count)
throw new InvalidFormatException ("Invalid image layer index");
var layer = new IarImage (iarc, dir[index]);
layer.Info.OffsetX -= offset_x;
layer.Info.OffsetY -= offset_y;
if (0x20 == cmd)
output.ApplyMask (layer);
else
output.Blend (layer);
}
break;
default:
Trace.WriteLine (string.Format ("Unknown layer type 0x{0:X2}", cmd), "IAR");
break;
}
}
return output;
}
}
