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(Legacy): Mink 'FC' images.

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morkt 2019-03-26 22:37:58 +04:00
parent c362743079
commit 3352b1b6bb
1 changed files with 309 additions and 0 deletions
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Legacy/Mink/ImageFC.cs Normal file
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//! \file ImageFC.cs
//! \date 2018 Nov 17
//! \brief Mink compressed bitmap format.
//
// Copyright (C) 2018-2019 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.Mink
{
internal class FcMetaData : ImageMetaData
{
public byte Flag;
}
[Export(typeof(ImageFormat))]
public class FcFormat : ImageFormat
{
public override string Tag { get { return "BMP/FC"; } }
public override string Description { get { return "Mink compressed bitmap format"; } }
public override uint Signature { get { return 0; } }
public FcFormat ()
{
Signatures = new uint[] { 0x01184346, 0x00184346, 0x00204346, 0 };
}
public override ImageMetaData ReadMetaData (IBinaryStream file)
{
var header = file.ReadHeader (8);
if (!header.AsciiEqual ("FC"))
return null;
int bpp = header[2];
if (bpp != 24 && bpp != 32)
return null;
byte flag = header[3];
if (flag != 0 && flag != 1)
return null;
return new FcMetaData {
Width = header.ToUInt16 (4),
Height = header.ToUInt16 (6),
BPP = bpp,
Flag = flag,
};
}
public override ImageData Read (IBinaryStream file, ImageMetaData info)
{
var reader = new FcReader (file, (FcMetaData)info);
return reader.Unpack();
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("FcFormat.Write not implemented");
}
}
internal class FcReader
{
IBinaryStream m_input;
FcMetaData m_info;
public FcReader (IBinaryStream input, FcMetaData info)
{
m_input = input;
m_info = info;
}
public ImageData Unpack ()
{
m_input.Position = 8;
var output = new uint[m_info.iWidth * m_info.iHeight];
UnpackRgb (output);
if (32 == m_info.BPP)
UnpackAlpha (output);
if (m_info.Flag != 0)
RestoreRgb (output);
PixelFormat format = 32 == m_info.BPP ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
return ImageData.CreateFlipped (m_info, format, null, output, m_info.iWidth * 4);
}
void UnpackRgb (uint[] output)
{
int dst = 0;
m_bits = 0x80000000;
uint ref_pixel = m_info.Flag != 0 ? 0x808080u : 0u;
uint pixel = ref_pixel;
while (dst < output.Length)
{
if (GetNextBit() == 0)
{
if (GetNextBit() != 0)
{
int offset = m_info.iWidth + GetNextBit();
pixel = output[dst - offset + 1];
}
else
{
pixel = output[dst - 1];
}
uint v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
pixel >>= 8;
output[dst++] = pixel;
}
else if (GetNextBit() == 0)
{
if (GetNextBit() == 0)
{
pixel = output[dst - m_info.iWidth - 1];
uint v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel = Binary.RotR (pixel, 8) + (v << 24);
pixel >>= 8;
output[dst++] = pixel;
}
else
{
pixel = ref_pixel;
uint v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel ^= v & 0xFF;
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel ^= (v & 0xFF) << 8;
v = GetVarInt();
v = (v >> 1) ^ (uint)-(v & 1);
pixel ^= (v & 0xFF) << 16;
output[dst++] = pixel;
}
}
else if (GetNextBit() != 0)
{
int offset = m_info.iWidth;
if (GetNextBit() != 0)
{
offset += GetNextBit();
}
else
{
offset -= 1;
}
pixel = output[dst - offset];
output[dst++] = pixel;
}
else if (GetNextBit() == 0)
{
pixel = GetBits (24);
output[dst++] = pixel;
}
else
{
int count = Math.Min ((int)GetVarInt(), output.Length - dst);
while (count --> 0)
{
output[dst++] = pixel;
}
}
}
}
void UnpackAlpha (uint[] output)
{
int dst = 0;
while (dst < output.Length)
{
uint val = GetBits (8) << 24;
uint count = GetVarInt() + 1;
while (count != 0)
{
output[dst++] |= val;
--count;
}
}
}
void RestoreRgb (uint[] output)
{
int stride = m_info.iWidth;
int dst = stride;
while (dst < output.Length)
{
uint prev = output[dst-stride];
uint pixel = output[dst];
output[dst] = ((pixel + prev - 0x80) & 0xFF)
| (((pixel >> 8) + (prev >> 8) - 0x80) & 0xFF) << 8
| (((pixel >> 16) + (prev >> 16) - 0x80) & 0xFF) << 16
| pixel & 0xFF000000;
++dst;
}
}
uint GetBits (int count)
{
uint val = m_bits >> (32 - count);
m_bits <<= count;
if (0 == m_bits)
{
m_bits = ReadUInt32();
int shift = BitScanForward (val);
uint ebx = m_bits ^ 0x80000000;
m_bits = (m_bits << 1 | 1) << shift;
val ^= ebx >> (shift ^ 0x1F);
}
return val;
}
uint m_bits;
int GetNextBit ()
{
uint bit = m_bits >> 31;
m_bits <<= 1;
if (0 == m_bits)
{
m_bits = ReadUInt32();
bit = m_bits >> 31;
m_bits = m_bits << 1 | 1;
}
return (int)bit;
}
uint GetVarInt ()
{
int count = 0;
do
{
++count;
}
while (GetNextBit() != 0);
uint num = 1;
while (count --> 0)
{
num = num << 1 | (uint)GetNextBit();
}
return num - 2;
}
byte[] m_dword_buffer = new byte[4];
uint ReadUInt32 ()
{
int last = m_input.Read (m_dword_buffer, 0, 4);
while (last < m_dword_buffer.Length)
m_dword_buffer[last++] = 0;
return BigEndian.ToUInt32 (m_dword_buffer, 0);
}
static int BitScanForward (uint val)
{
int count = 0;
for (uint mask = 1; mask != 0; mask <<= 1)
{
if ((val & mask) != 0)
break;
++count;
}
return count;
}
}
}