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GARbro-mirror/ArcFormats/Softpal/ImagePIC.cs

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//! \file ImagePIC.cs
//! \date Sun Jan 24 18:48:25 2016
//! \brief Softpal engine image format.
//
// 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;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using GameRes.Utility;
namespace GameRes.Formats.Softpal
{
internal class PicMetaData : ImageMetaData
{
public int BlocksWidth;
public int BlocksHeight;
}
[Export(typeof(ImageFormat))]
public class PicFormat : ImageFormat
{
public override string Tag { get { return "PIC/SOFTPAL"; } }
public override string Description { get { return "Softpal engine image format"; } }
public override uint Signature { get { return 0; } }
public PicFormat ()
{
Extensions = new string[] { "" };
}
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[8];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int bpp = LittleEndian.ToInt16 (header, 0);
if (1 != bpp && 3 != bpp && 4 != bpp)
return null;
uint width = LittleEndian.ToUInt16 (header, 2);
uint height = LittleEndian.ToUInt16 (header, 4);
if (0 == width || 0 == height || header[6]*8 < width || header[7]*8 < height)
return null;
return new PicMetaData
{
Width = width,
Height = height,
BPP = bpp * 8,
BlocksWidth = header[6],
BlocksHeight = header[7],
};
}
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = (PicMetaData)info;
using (var reader = new PicReader (stream, meta))
{
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("PicFormat.Write not implemented");
}
}
internal sealed class PicReader : IDisposable
{
BinaryReader m_input;
byte[] m_output;
PicMetaData m_info;
byte[] m_control;
int m_src_stride;
public PixelFormat Format { get; private set; }
public byte[] Data { get { return m_output; } }
readonly byte[] Values2bit = InitBlockValues (2);
readonly byte[] Values4bit = InitBlockValues (8);
readonly byte[] Values6bit = InitBlockValues (0x20);
public PicReader (Stream input, PicMetaData info)
{
m_input = new ArcView.Reader (input);
m_info = info;
m_src_stride = m_info.BlocksWidth * m_info.BPP;
}
static byte[] InitBlockValues (int length)
{
var values = new byte[length*2];
for (int i = 0; i < length; ++i)
{
values[i] = (byte)i;
values[values.Length-1-i] = (byte)(-1-i);
}
return values;
}
public void Unpack ()
{
m_input.BaseStream.Position = 8;
m_control = m_input.ReadBytes (m_info.BlocksHeight * m_info.BlocksWidth);
m_output = new byte[m_src_stride * m_info.BlocksHeight * 8];
if (8 == m_info.BPP)
{
Format = PixelFormats.Gray8;
Unpack8bpp();
}
else if (24 == m_info.BPP)
{
Format = PixelFormats.Bgr24;
Unpack24bpp();
}
else if (32 == m_info.BPP)
{
Format = PixelFormats.Bgra32;
Unpack32bpp();
}
else
throw new InvalidFormatException();
int dst_stride = (int)m_info.Width * m_info.BPP / 8;
byte[] flipped = new byte[dst_stride*(int)m_info.Height];
int dst = 0;
int src = m_output.Length - m_src_stride;
while (dst < flipped.Length)
{
Buffer.BlockCopy (m_output, src, flipped, dst, dst_stride);
dst += dst_stride;
src -= m_src_stride;
}
m_output = flipped;
}
void Unpack24bpp()
{
int pixel_size = 3;
var pixel = new byte[4];
var block = new byte[64];
for (int y = 0; y < m_info.BlocksHeight; ++y)
{
for (int x = 0; x < m_info.BlocksWidth; ++x)
{
byte ctl = m_control[x + m_info.BlocksWidth * (m_info.BlocksHeight - y - 1)];
if (0x80 == ctl)
{
int dst = pixel_size * 8 * (x + 8 * y * m_info.BlocksWidth);
for (int i = 0; i < 8; ++i)
{
for (int j = 0; j < 24; ++j)
m_output[dst+j] = 0;
dst += m_src_stride;
}
}
else
{
m_input.Read (pixel, 0, pixel_size);
for (int channel = 0; channel < pixel_size; ++channel)
{
DecodeBlock (ctl & 3, pixel[channel], block);
int dst = pixel_size * 8 * (x + 8 * y * m_info.BlocksWidth) + channel;
int src = 0;
for (int i = 0; i < 8; ++i)
{
m_output[dst] = block[src++];
m_output[dst+3] = block[src++];
m_output[dst+6] = block[src++];
m_output[dst+9] = block[src++];
m_output[dst+12] = block[src++];
m_output[dst+15] = block[src++];
m_output[dst+18] = block[src++];
m_output[dst+21] = block[src++];
dst += m_src_stride;
}
ctl >>= 2;
}
}
}
}
}
void Unpack32bpp()
{
int pixel_size = 4;
var pixel = new byte[4];
var block = new byte[64];
for (int y = 0; y < m_info.BlocksHeight; ++y)
{
for (int x = 0; x < m_info.BlocksWidth; ++x)
{
byte ctl = m_control[x + m_info.BlocksWidth * (m_info.BlocksHeight - y - 1)];
m_input.Read (pixel, 0, pixel_size);
for (int channel = 0; channel < pixel_size; ++channel)
{
DecodeBlock (ctl & 3, pixel[channel], block);
int dst = 8 * pixel_size * (x + 8 * y * m_info.BlocksWidth) + ChannelOrder[channel];
int src = 0;
for (int i = 0; i < 8; ++i)
{
m_output[dst] = block[src++];
m_output[dst+4] = block[src++];
m_output[dst+8] = block[src++];
m_output[dst+12] = block[src++];
m_output[dst+16] = block[src++];
m_output[dst+20] = block[src++];
m_output[dst+24] = block[src++];
m_output[dst+28] = block[src++];
dst += m_src_stride;
}
ctl >>= 2;
}
}
}
}
static readonly byte[] ChannelOrder = { 3, 0, 1, 2 };
void Unpack8bpp()
{
var block = new byte[64];
for (int y = 0; y < m_info.BlocksHeight; ++y)
{
for (int x = 0; x < m_info.BlocksWidth; ++x)
{
byte ctl = m_control[x + m_info.BlocksWidth * (m_info.BlocksHeight - y - 1)];
if (0x80 == ctl)
{
for (int i = 0; i < block.Length; ++i)
block[i] = 0;
}
else if (0x81 == ctl)
{
for (int i = 0; i < block.Length; ++i)
block[i] = 0xFF;
}
else
{
byte pixel = m_input.ReadByte();
DecodeBlock (ctl, pixel, block);
}
int dst = 8 * (x + 8 * y * m_info.BlocksWidth);
int src = 0;
for (int i = 0; i < 8; ++i)
{
Buffer.BlockCopy (block, src, m_output, dst, 8);
dst += m_src_stride;
src += 8;
}
}
}
}
void DecodeBlock (int control, byte pixel, byte[] block)
{
int dst = 0;
switch (control)
{
case 0:
for (int i = 0; i < 16; ++i)
{
int b = m_input.ReadByte();
block[dst++] = Values2bit[b >> 6];
block[dst++] = Values2bit[(b >> 4) & 3];
block[dst++] = Values2bit[(b >> 2) & 3];
block[dst++] = Values2bit[b & 3];
}
break;
case 1:
for (int i = 0; i < 32; ++i)
{
int b = m_input.ReadByte();
block[dst++] = Values4bit[b >> 4];
block[dst++] = Values4bit[b & 0xF];
}
break;
case 2:
for (int i = 0; i < 16; ++i)
{
int b1 = m_input.ReadByte();
int b2 = m_input.ReadByte();
int b3 = m_input.ReadByte();
int b4 = (b3 >> 6) | ((b2 >> 4) & 0xC) | ((b1 >> 2) & 0x30);
block[dst++] = Values6bit[b1 & 0x3F];
block[dst++] = Values6bit[b2 & 0x3F];
block[dst++] = Values6bit[b3 & 0x3F];
block[dst++] = Values6bit[b4];
}
break;
case 3:
if (64 != m_input.Read (block, 0, 64))
throw new EndOfStreamException();
break;
}
int v32 = pixel + block[27];
block[27] = (byte)v32;
block[26] += (byte)v32;
block[25] += block[26];
block[24] += block[25];
int v34 = v32 + block[18];
block[19] += (byte)v32;
block[18] = (byte)v34;
block[17] += (byte)v34;
block[16] += block[17];
int v36 = v34 + block[9];
block[11] += block[19];
block[10] += (byte)v34;
block[9] = (byte)v36;
block[8] += (byte)v36;
block[3] += block[11];
block[2] += block[10];
block[1] += (byte)v36;
block[0] += (byte)v36;
int v39 = pixel + block[28];
block[28] = (byte)v39;
block[29] += (byte)v39;
block[30] += block[29];
block[31] += block[30];
int v41 = v39 + block[21];
block[20] += (byte)v39;
block[21] = (byte)v41;
block[22] += (byte)v41;
block[23] += block[22];
int v43 = v41 + block[14];
block[12] += block[20];
block[13] += (byte)v41;
block[14] = (byte)v43;
block[15] += (byte)v43;
block[4] += block[12];
block[5] += block[13];
block[6] += (byte)v43;
block[7] += (byte)v43;
int v46 = pixel + block[35];
block[35] = (byte)v46;
block[34] += (byte)v46;
block[33] += block[34];
block[32] += block[33];
int v48 = v46 + block[42];
block[43] += (byte)v46;
block[42] = (byte)v48;
block[41] += (byte)v48;
block[40] += block[41];
int v50 = v48 + block[49];
block[51] += block[43];
block[50] += (byte)v48;
block[49] = (byte)v50;
block[48] += (byte)v50;
block[59] += block[51];
block[58] += block[50];
block[57] += (byte)v50;
block[56] += (byte)v50;
int v53 = pixel + block[36];
block[36] = (byte)v53;
block[37] += (byte)v53;
block[38] += block[37];
block[39] += block[38];
int v56 = v53 + block[45];
block[44] += (byte)v53;
block[45] = (byte)v56;
block[46] += (byte)v56;
block[47] += block[46];
int v58 = v56 + block[54];
block[52] += block[44];
block[53] += (byte)v56;
block[54] = (byte)v58;
block[55] += (byte)v58;
block[60] += block[52];
block[61] += block[53];
block[62] += (byte)v58;
block[63] += (byte)v58;
}
#region IDisposable Members
bool _disposed = false;
public void Dispose ()
{
if (!_disposed)
{
m_input.Dispose();
_disposed = true;
}
}
#endregion
}
}
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