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(PrsFormat): implemented 32bpp images.

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This commit is contained in:
morkt 2016-05-31 02:47:02 +04:00
parent b18ede8684
commit 0323b70b4c
1 changed files with 34 additions and 13 deletions
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47
ArcFormats/Marble/ImagePRS.cs
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@ -58,14 +58,17 @@ namespace GameRes.Formats.Marble
var header = new byte[0x10];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
if (header[0] != 'Y' || header[1] != 'B' || header[3] != 3)
if (header[0] != 'Y' || header[1] != 'B')
return null;
int bpp = header[3];
if (bpp != 3 && bpp != 4)
return null;
return new PrsMetaData
{
Width = LittleEndian.ToUInt16 (header, 12),
Height = LittleEndian.ToUInt16 (header, 14),
BPP = 24,
BPP = 8 * bpp,
Flag = header[2],
PackedSize = LittleEndian.ToUInt32 (header, 4),
};
@ -73,15 +76,10 @@ namespace GameRes.Formats.Marble
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as PrsMetaData;
if (null == meta)
throw new ArgumentException ("PrsFormat.Read should be supplied with PrsMetaData", "info");
stream.Position = 0x10;
using (var reader = new Reader (stream, meta))
using (var reader = new Reader (stream, (PrsMetaData)info))
{
reader.Unpack();
return ImageData.Create (meta, PixelFormats.Bgr24, null, reader.Data, (int)meta.Width*3);
return ImageData.Create (info, reader.Format, null, reader.Data, reader.Stride);
}
}
@ -91,15 +89,24 @@ namespace GameRes.Formats.Marble
byte[] m_output;
uint m_size;
byte m_flag;
int m_depth;
public byte[] Data { get { return m_output; } }
public byte[] Data { get { return m_output; } }
public PixelFormat Format { get; private set; }
public int Stride { get; private set; }
public Reader (Stream file, PrsMetaData info)
{
m_input = new BinaryReader (file, Encoding.ASCII, true);
m_output = new byte[info.Width*info.Height*3];
m_size = info.PackedSize;
m_flag = info.Flag;
m_depth = info.BPP / 8;
if (3 == m_depth)
Format = PixelFormats.Bgr24;
else
Format = PixelFormats.Bgra32;
Stride = (int)info.Width * m_depth;
m_output = new byte[Stride * (int)info.Height];
}
static readonly int[] LengthTable = InitLengthTable();
@ -116,6 +123,7 @@ namespace GameRes.Formats.Marble
public void Unpack ()
{
m_input.BaseStream.Position = 0x10;
int dst = 0;
int remaining = (int)m_size;
int bit = 0;
@ -188,9 +196,22 @@ namespace GameRes.Formats.Marble
}
if ((m_flag & 0x80) != 0)
{
for (int i = 3; i < m_output.Length; ++i)
m_output[i] += m_output[i-3];
for (int i = m_depth; i < m_output.Length; ++i)
m_output[i] += m_output[i-m_depth];
}
if (4 == m_depth && IsDummyAlphaChannel())
Format = PixelFormats.Bgr32;
}
bool IsDummyAlphaChannel ()
{
byte alpha = m_output[3];
if (0xFF == alpha)
return false;
for (int i = 7; i < m_output.Length; i += 4)
if (m_output[i] != alpha)
return false;
return true;
}
#region IDisposable Members