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(PgxFormat): read additional image meta data.

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This commit is contained in:
morkt 2016-05-23 22:38:37 +04:00
parent 733e731eda
commit f44a2a5e9c
1 changed files with 34 additions and 2 deletions
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36
ArcFormats/Glib2/ImagePGX.cs
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@ -38,6 +38,7 @@ namespace GameRes.Formats.Glib2
internal class PgxMetaData : ImageMetaData
{
public int PackedSize;
public int Flags;
}
internal class StxLayerInfo
@ -66,18 +67,24 @@ namespace GameRes.Formats.Glib2
{
Width = LittleEndian.ToUInt32 (header, 8),
Height = LittleEndian.ToUInt32 (header, 12),
BPP = LittleEndian.ToInt16 (header, 0x10) == 0 ? 24 : 32,
BPP = (LittleEndian.ToInt16 (header, 0x10) & 1) == 0 ? 24 : 32,
PackedSize = LittleEndian.ToInt32 (header, 0x14),
Flags = LittleEndian.ToUInt16 (header, 0x12),
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (PgxMetaData)info;
stream.Position = 0x20;
if (0 != (meta.Flags & 0x1000))
{
ReadGms (stream);
}
PixelFormat format = 32 == meta.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
int stride = (int)meta.Width * 4;
var pixels = new byte[stride * (int)meta.Height];
stream.Seek (-meta.PackedSize, SeekOrigin.End);
// stream.Seek (-meta.PackedSize, SeekOrigin.End);
LzssUnpack (stream, pixels);
var layer = InfoCache.GetInfo (info.FileName);
if (null != layer && null != layer.Rect)
@ -88,6 +95,31 @@ namespace GameRes.Formats.Glib2
return ImageData.Create (info, format, null, pixels);
}
void ReadGms (Stream input)
{
var header = new byte[0x10];
if (0x10 != input.Read (header, 0, 0x10))
throw new EndOfStreamException();
byte swap = header[13];
header[13] = header[9];
header[9] = swap;
swap = header[15];
header[15] = header[11];
header[11] = swap;
swap = header[4];
header[4] = header[8];
header[8] = swap;
swap = header[6];
header[6] = header[10];
header[10] = swap;
int unpacked_size = LittleEndian.ToInt32 (header, 12);
var gms_info = new byte[unpacked_size];
LzssUnpack (input, gms_info);
// foreach (byte in gms_info) byte ^= 0xFF
// decrypted array contains image meta data (see InfoReader class)
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("PgxFormat.Write not implemented");