GARbro-mirror/ArcFormats/Tmr-Hiro/ImageGRD.cs

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//! \file ImageGRD.cs
//! \date Wed Dec 23 17:00:30 2015
//! \brief Tmr-Hiro ADV System image format.
//
// Copyright (C) 2015 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 GameRes.Utility;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
using System.Collections.Generic;
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namespace GameRes.Formats.TmrHiro
{
internal class GrdMetaData : ImageMetaData
{
public int Format;
public int AlphaSize;
public int RSize;
public int GSize;
public int BSize;
}
[Export(typeof(ImageFormat))]
public class GrdFormat : ImageFormat
{
public override string Tag { get { return "GRD/TMR-HIRO"; } }
public override string Description { get { return "Tmr-Hiro ADV System image format"; } }
public override uint Signature { get { return 0; } }
public GrdFormat ()
{
Extensions = new string[] { "grd", "" };
}
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public override ImageMetaData ReadMetaData (IBinaryStream stream)
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{
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var header = stream.ReadHeader (0x20);
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if (header[0] != 1 && header[0] != 2)
return null;
if (header[1] != 1 && header[1] != 0xA1 && header[1] != 0xA2)
return null;
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int bpp = header.ToUInt16 (6);
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if (bpp != 24 && bpp != 32)
return null;
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int screen_width = header.ToUInt16 (2);
int screen_height = header.ToUInt16 (4);
int left = header.ToUInt16 (8);
int right = header.ToUInt16 (0xA);
int top = header.ToUInt16 (0xC);
int bottom = header.ToUInt16 (0xE);
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var info = new GrdMetaData {
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Format = header.ToUInt16 (0),
Width = (uint)System.Math.Abs (right - left),
Height = (uint)System.Math.Abs (bottom - top),
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BPP = bpp,
OffsetX = left,
OffsetY = screen_height - bottom,
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AlphaSize = header.ToInt32 (0x10),
RSize = header.ToInt32 (0x14),
GSize = header.ToInt32 (0x18),
BSize = header.ToInt32 (0x1C),
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};
if (0x20 + info.AlphaSize + info.RSize + info.BSize + info.GSize != stream.Length)
return null;
return info;
}
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public override ImageData Read (IBinaryStream stream, ImageMetaData info)
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{
var meta = (GrdMetaData)info;
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var reader = new GrdReader (stream.AsStream, meta);
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reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data);
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("GrdFormat.Write not implemented");
}
}
internal sealed class GrdReader
{
Stream m_input;
GrdMetaData m_info;
byte[] m_output;
int m_pack_type;
int m_pixel_size;
byte[] m_channel;
public PixelFormat Format { get; private set; }
public byte[] Data { get { return m_output; } }
public GrdReader (Stream input, GrdMetaData info)
{
m_input = input;
m_info = info;
if (24 == m_info.BPP)
Format = PixelFormats.Bgr24;
else if (m_info.AlphaSize > 0)
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Format = PixelFormats.Bgra32;
else
Format = PixelFormats.Bgr32;
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int channel_size = (int)(m_info.Width * m_info.Height);
m_pack_type = m_info.Format >> 8;
m_pixel_size = m_info.BPP / 8;
m_output = new byte[m_pixel_size * channel_size];
m_channel = new byte[channel_size];
}
public void Unpack ()
{
int next_pos = 0x20;
if (32 == m_info.BPP && m_info.AlphaSize > 0)
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{
UnpackChannel (3, next_pos, m_info.AlphaSize);
next_pos += m_info.AlphaSize;
}
UnpackChannel (2, next_pos, m_info.RSize);
next_pos += m_info.RSize;
UnpackChannel (1, next_pos, m_info.GSize);
next_pos += m_info.GSize;
UnpackChannel (0, next_pos, m_info.BSize);
}
void UnpackChannel (int dst, int src_pos, int src_size)
{
m_input.Position = src_pos;
if (1 == m_pack_type)
{
UnpackRLE (m_input, src_size);
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}
else
{
var data = UnpackHuffman (m_input);
if (0xA2 == m_pack_type)
{
UnpackLZ77 (data, m_channel);
}
else
{
using (var mem = new MemoryStream (data))
UnpackRLE (mem, data.Length);
}
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}
for (int y = (int)m_info.Height-1; y >= 0; --y)
{
int src = y * (int)m_info.Width;
for (uint x = 0; x < m_info.Width; ++x)
{
m_output[dst] = m_channel[src++];
dst += m_pixel_size;
}
}
}
void UnpackRLE (Stream input, int src_size)
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{
int src = 0;
int dst = 0;
while (src < src_size)
{
int count = input.ReadByte();
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if (-1 == count)
return;
++src;
if (count > 0x7F)
{
count &= 0x7F;
byte v = (byte)input.ReadByte();
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++src;
for (int i = 0; i < count; ++i)
m_channel[dst++] = v;
}
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else if (count > 0)
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{
input.Read (m_channel, dst, count);
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src += count;
dst += count;
}
}
}
static void UnpackLZ77 (byte[] input, byte[] output)
{
var special = input[8];
int src = 12;
int dst = 0;
while (dst < output.Length)
{
byte b = input[src++];
if (b == special)
{
byte offset = input[src++];
if (offset != special)
{
byte count = input[src++];
if (offset > special)
--offset;
Binary.CopyOverlapped (output, dst - offset, dst, count);
dst += count;
}
else
output[dst++] = offset;
}
else
output[dst++] = b;
}
}
const int RootNodeIndex = 0x1FE;
int m_huffman_unpacked;
byte[] UnpackHuffman (Stream input)
{
var tree = CreateHuffmanTree (input);
var unpacked = new byte[m_huffman_unpacked];
using (var bits = new LsbBitStream (input, true))
{
int dst = 0;
while (dst < m_huffman_unpacked)
{
int node = RootNodeIndex;
while (node > 0xFF)
{
if (0 != bits.GetNextBit())
node = tree[node].Right;
else
node = tree[node].Left;
}
unpacked[dst++] = (byte)node;
}
}
return unpacked;
}
HuffmanNode[] CreateHuffmanTree (Stream input)
{
var nodes = new HuffmanNode[0x200];
var tree = new List<int> (0x100);
using (var reader = new ArcView.Reader (input))
{
m_huffman_unpacked = reader.ReadInt32();
reader.ReadInt32(); // packed_size
for (int i = 0; i < 0x100; i++)
{
nodes[i].Freq = reader.ReadUInt32();
AddNode (tree, nodes, i);
}
}
int last_node = 0x100;
while (tree.Count > 1)
{
int l = tree[0];
tree.RemoveAt (0);
int r = tree[0];
tree.RemoveAt (0);
nodes[last_node].Freq = nodes[l].Freq + nodes[r].Freq;
nodes[last_node].Left = l;
nodes[last_node].Right = r;
AddNode (tree, nodes, last_node++);
}
return nodes;
}
static void AddNode (List<int> tree, HuffmanNode[] nodes, int index)
{
uint freq = nodes[index].Freq;
int i;
for (i = 0; i < tree.Count; ++i)
if (nodes[tree[i]].Freq > freq)
break;
tree.Insert (i, index);
}
internal struct HuffmanNode
{
public uint Freq;
public int Left;
public int Right;
}
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}
}