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(CWP): reworked png stream reconstruction.

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morkt 2018-06-14 23:16:29 +04:00
parent 0ff3c7e8a5
commit e1d0db6b6c
1 changed files with 42 additions and 30 deletions
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72
ArcFormats/Crowd/ImageCWP.cs
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@ -2,7 +2,7 @@
//! \date Thu Jun 11 13:43:41 2015
//! \brief Crowd engine image format.
//
// Copyright (C) 2015 by morkt
// 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
@ -26,6 +26,7 @@
using System;
using System.ComponentModel.Composition;
using System.IO;
using System.Text;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using GameRes.Utility;
@ -40,15 +41,23 @@ namespace GameRes.Formats.Crowd
public override uint Signature { get { return 0x50445743; } } // 'CWDP'
public override bool CanWrite { get { return true; } }
public CwpFormat ()
{
Extensions = new string[] { "cwp", "amp" };
Signatures = new uint[] { 0x50445743, 0x504E4D41 }; // 'AMNP'
}
public override ImageMetaData ReadMetaData (IBinaryStream input)
{
input.Position = 4;
uint width = Binary.BigEndian (input.ReadUInt32());
uint height = Binary.BigEndian (input.ReadUInt32());
var header = input.ReadHeader (0x11);
uint width = BigEndian.ToUInt32 (header, 4);
uint height = BigEndian.ToUInt32 (header, 8);
if (0 == width || 0 == height)
return null;
int bpp = input.ReadByte();
int color_type = input.ReadByte();
int bpp = header[0xC];
if (bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8 && bpp != 16)
return null;
int color_type = header[0xD];
switch (color_type)
{
case 2: bpp *= 3; break;
@ -62,43 +71,46 @@ namespace GameRes.Formats.Crowd
{
Width = width,
Height = height,
BPP = bpp,
BPP = 32, // always converted to 32bpp
};
}
Stream OpenAsPng (IBinaryStream input)
{
var header = new byte[0x29];
Buffer.BlockCopy (PngFormat.HeaderBytes, 0, header, 0, PngFormat.HeaderBytes.Length);
header[0xB] = 0xD;
Encoding.ASCII.GetBytes ("IHDR", 0, 4, header, 0xC);
input.Position = 4;
input.Read (header, 0x10, 0x15);
Encoding.ASCII.GetBytes ("IDAT", 0, 4, header, 0x25);
var footer = new byte[] {
0, 0, 0, (byte)'I', (byte)'E', (byte)'N', (byte)'D', 0xAE, 0x42, 0x60, 0x82
};
Stream png = new StreamRegion (input.AsStream, 0x19, true);
Stream end = new MemoryStream (footer);
png = new ConcatStream (png, end);
return new PrefixStream (header, png);
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var header = new byte[0x15];
using (var mem = new MemoryStream((int)(0x14 + file.Length + 12)))
using (var png = new BinaryWriter (mem))
using (var png = OpenAsPng (file))
{
png.Write (0x474E5089u); // png header
png.Write (0x0A1A0A0Du);
png.Write (0x0D000000u);
png.Write (0x52444849u); // 'IHDR'
file.Position = 4;
file.Read (header, 0, header.Length);
png.Write (header, 0, header.Length);
png.Write (0x54414449u); // 'IDAT'
file.AsStream.CopyTo (mem);
header[1] = 0;
header[2] = 0;
header[3] = 0;
LittleEndian.Pack (0x444E4549, header, 4);
LittleEndian.Pack (0x826042AE, header, 8);
png.Write (header, 1, 11);
mem.Position = 0;
var decoder = new PngBitmapDecoder (mem, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
var decoder = new PngBitmapDecoder (png, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
BitmapSource frame = decoder.Frames[0];
var pixels = new byte[info.Width*info.Height*4];
frame.CopyPixels (pixels, (int)info.Width*4, 0);
if (frame.Format.BitsPerPixel != 32)
frame = new FormatConvertedBitmap (frame, PixelFormats.Bgr32, null, 0);
int stride = (int)info.Width * 4;
var pixels = new byte[(int)info.Height * stride];
frame.CopyPixels (pixels, stride, 0);
for (int i = 0; i < pixels.Length; i += 4)
{
byte t = pixels[i];
pixels[i] = pixels[i+2];
pixels[i+2] = t;
}
return ImageData.Create (info, PixelFormats.Bgr32, null, pixels);
return ImageData.Create (info, PixelFormats.Bgr32, null, pixels, stride);
}
}