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(Legacy): CMP images.

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This commit is contained in:
morkt 2018-09-21 00:04:48 +04:00
parent f6d437d201
commit 37e96ac53f
1 changed files with 104 additions and 5 deletions
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109
Legacy/Ark/ImageCMP.cs
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@ -23,6 +23,8 @@
// IN THE SOFTWARE.
//
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
using System.Windows.Media;
@ -34,8 +36,8 @@ namespace GameRes.Formats.Ark
internal class CmpMetaData : ImageMetaData
{
public bool HasAlpha;
public uint AWidth;
public uint AHeight;
public int AWidth;
public int AHeight;
public uint[] FreqTable;
public int DataOffset;
}
@ -54,7 +56,7 @@ namespace GameRes.Formats.Ark
var header = file.ReadHeader (5);
uint width = header.ToUInt16 (0);
uint height = header.ToUInt16 (2);
bool has_alpha = header[4];
bool has_alpha = header[4] != 0;
int aw = 0, ah = 0;
if (has_alpha)
{
@ -84,7 +86,7 @@ namespace GameRes.Formats.Ark
{
var reader = new CmpReader (file, (CmpMetaData)info);
var pixels = reader.Unpack();
return ImageData.Create (info, reader.Format, null, pixels);
return ImageData.Create (info, reader.Format, null, pixels, reader.Stride);
}
public override void Write (Stream file, ImageData image)
@ -97,18 +99,115 @@ namespace GameRes.Formats.Ark
{
IBinaryStream m_input;
CmpMetaData m_info;
int m_stride;
public PixelFormat Format { get; private set; }
public int Stride { get { return m_stride; } }
public CmpReader (IBinaryStream input, CmpMetaData info)
{
m_input = input;
m_info = info;
m_stride = (int)info.Width * 2;
Format = PixelFormats.Bgr555;
}
public byte[] Unpack ()
public Array Unpack ()
{
m_input.Position = m_info.DataOffset;
int plane_size = (int)m_info.Width * (int)m_info.Height;
var planes = new byte[plane_size * 3];
using (var bits = new MsbBitStream (m_input.AsStream, true))
UnpackHuffman (bits, planes);
int rsrc = 0;
int gsrc = plane_size;
int bsrc = plane_size * 2;
int width = m_stride / 2;
var output = new ushort[width * (int)m_info.Height];
int dst_row = output.Length - width;
while (dst_row >= 0)
{
int dst = dst_row;
for (int x = (int)m_info.Width; x > 0; --x)
{
int color = planes[bsrc++] << 10 | planes[gsrc++] << 5 | planes[rsrc++];
output[dst++] = (ushort)color;
}
dst_row -= width;
}
return output;
}
void UnpackHuffman (MsbBitStream input, byte[] output)
{
var root = BuildHuffmanTree (m_info.FreqTable);
int dst = 0;
byte last_symbol = 0;
while (dst < output.Length)
{
var node = root;
while (node.Symbol > 0x1F)
{
if (input.GetNextBit() != 0)
node = node.Left;
else
node = node.Right;
}
byte symbol = (byte)(last_symbol + node.Symbol);
if (symbol > 0x1F)
symbol -= 0x20;
output[dst++] = symbol;
last_symbol = symbol;
}
}
class Node
{
public byte Symbol;
public uint Freq;
public Node Left;
public Node Right;
}
Node BuildHuffmanTree (uint[] freq_table)
{
var tree = new List<Node> (256);
for (byte i = 0; i < 32; ++i)
{
tree.Add (new Node { Symbol = i, Freq = freq_table[i] });
}
for (byte i = 32; i < 255; ++i)
{
tree.Add (new Node { Symbol = i });
}
while (tree.Count > 1)
{
Node[] child = { null, null };
for (int i = 0; i < 2; i++)
{
Node last_node = null;
uint min_freq = uint.MaxValue;
foreach (var node in tree)
{
if (node.Freq <= min_freq)
{
min_freq = node.Freq;
last_node = node;
}
}
child[i] = last_node;
tree.Remove (last_node);
}
tree.Add (new Node {
Symbol = 0xFF,
Freq = child[0].Freq + child[1].Freq,
Left = child[0],
Right = child[1]
});
}
return tree[0];
}
}
}