GARbro-mirror/ArcFormats/Palette/ArcCHR.cs
2018-10-09 14:36:18 +04:00

187 lines
8.0 KiB
C#

//! \file ArcCHR.cs
//! \date Mon Oct 26 07:26:39 2015
//! \brief Multi-frame PNG archive.
//
// Copyright (C) 2015-2018 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;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
namespace GameRes.Formats.Palette
{
internal class CharEntry : Entry
{
public int OffsetX;
public int OffsetY;
}
internal class VirtualCharEntry : Entry
{
public CharEntry Source;
}
[Export(typeof(ArchiveFormat))]
public class ChrOpener : ArchiveFormat
{
public override string Tag { get { return "CHR/Palette"; } }
public override string Description { get { return "Palette multi-frame PNG archive"; } }
public override uint Signature { get { return 0x72616863; } } // 'char'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public ChrOpener ()
{
Extensions = new string[] { "chr" };
}
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);
}
public override IImageDecoder OpenImage (ArcFile arc, Entry entry)
{
if (entry is VirtualCharEntry)
return BlendEntry (arc, entry as VirtualCharEntry);
var input = arc.OpenBinaryEntry (entry);
var info = ImageFormat.Png.ReadMetaData (input);
input.Position = 0;
return new ImageFormatDecoder (input, ImageFormat.Png, info);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
if (entry is VirtualCharEntry)
return Stream.Null;
int extra_length = PgaFormat.PngHeader.Length + PgaFormat.PngFooter.Length;
var png = new MemoryStream ((int)entry.Size + extra_length + 17);
var cent = entry as CharEntry;
png.Write (PgaFormat.PngHeader, 0, PgaFormat.PngHeader.Length);
using (var body = arc.File.CreateStream (entry.Offset, entry.Size))
{
if (cent != null && cent != arc.Dir.First()
&& (cent.OffsetX != 0 || cent.OffsetY != 0))
{
// inject oFFs chunk into PNG stream
using (var reader = new BinaryReader (body, Encoding.ASCII, true))
using (var writer = new BinaryWriter (png, Encoding.ASCII, true))
{
var ihdr_size = reader.ReadInt32();
writer.Write (ihdr_size);
ihdr_size = Binary.BigEndian (ihdr_size);
writer.Write (reader.ReadBytes (ihdr_size+8));
writer.Write (Binary.BigEndian ((int)9));
int position = (int)writer.BaseStream.Position;
char[] tag = { 'o', 'F', 'F', 's' };
writer.Write (tag);
writer.Write (Binary.BigEndian (cent.OffsetX));
writer.Write (Binary.BigEndian (cent.OffsetY));
writer.Write ((byte)0);
uint crc = Crc32.Compute (png.GetBuffer(), position, 13);
writer.Write (Binary.BigEndian (crc));
}
}
body.CopyTo (png);
}
png.Write (PgaFormat.PngFooter, 0, PgaFormat.PngFooter.Length);
png.Position = 0;
return png;
}
IImageDecoder 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);
return new BitmapSourceDecoder (bmp);
}
}
}
}