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//! \file ArcPNA.cs
//! \date Wed Feb 17 23:02:21 2016
//! \brief Pulltop multi-frame image.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace GameRes.Formats.Will
{
internal class PnaEntry : ImageEntry
{
public ImageMetaData Info;
}
[Export(typeof(ArchiveFormat))]
public class PnaOpener : ArchiveFormat
{
public override string Tag { get { return "PNA"; } }
public override string Description { get { return "Pulltop multi-frame image format"; } }
public override uint Signature { get { return 0x50414E50; } } // 'PNAP'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
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public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (0x10);
if (!IsSaneCount (count))
return null;
var base_name = Path.GetFileNameWithoutExtension (file.Name);
uint index_offset = 0x14;
uint current_offset = index_offset + (uint)count*0x28;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
uint size = file.View.ReadUInt32 (index_offset+0x24);
if (size > 0)
{
var imginfo = new ImageMetaData {
OffsetX = file.View.ReadInt32 (index_offset+8),
OffsetY = file.View.ReadInt32 (index_offset+0xC),
Width = file.View.ReadUInt32 (index_offset+0x10),
Height = file.View.ReadUInt32 (index_offset+0x14),
BPP = 32,
};
var entry = new PnaEntry {
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Name = string.Format ("{0}#{1:D3}", base_name, i),
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Size = size,
Offset = current_offset,
Info = imginfo,
};
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
current_offset += entry.Size;
}
index_offset += 0x28;
}
return new ArcFile (file, this, dir);
}
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public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
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{
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var pent = (PnaEntry)entry;
var input = arc.File.CreateStream (entry.Offset, entry.Size);
return new PnaDecoder (input, pent.Info);
}
}
internal sealed class PnaDecoder : IImageDecoder
{
IBinaryStream m_input;
ImageMetaData m_info;
ImageData m_image;
public Stream Source { get { m_input.Position = 0; return m_input.AsStream; } }
public ImageFormat SourceFormat { get { return null; } }
public ImageMetaData Info { get { return m_info; } }
public ImageData Image
{
get
{
if (null == m_image)
{
var pixels = ReadPixels();
m_image = ImageData.Create (m_info, PixelFormats.Bgra32, null, pixels);
}
return m_image;
}
}
public PnaDecoder (IBinaryStream input, ImageMetaData info)
{
m_input = input;
m_info = info;
}
byte[] ReadPixels ()
{
var image = ImageFormat.Read (m_input);
if (null == image)
throw new InvalidFormatException();
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var bitmap = image.Bitmap;
if (bitmap.Format.BitsPerPixel != 32)
{
bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgra32, null, 0);
}
int stride = bitmap.PixelWidth * 4;
var pixels = new byte[stride * bitmap.PixelHeight];
bitmap.CopyPixels (pixels, stride, 0);
// restore colors premultiplied by alpha
for (int i = 0; i < pixels.Length; i += 4)
{
int alpha = pixels[i+3];
if (alpha != 0 && alpha != 0xFF)
{
pixels[i] = (byte)(pixels[i] * 0xFF / alpha);
pixels[i+1] = (byte)(pixels[i+1] * 0xFF / alpha);
pixels[i+2] = (byte)(pixels[i+2] * 0xFF / alpha);
}
}
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return pixels;
}
bool m_disposed = false;
public void Dispose ()
{
if (!m_disposed)
{
m_input.Dispose();
m_disposed = true;
}
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}
}
}