mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-23 13:45:34 +08:00
330 lines
10 KiB
C#
330 lines
10 KiB
C#
//! \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 ()
|
|
{
|
|
// 'Fc' is same as 'FC' but has checksum byte appended at the end
|
|
Signatures = new uint[] {
|
|
0x00184346, 0x01184346, 0x00204346, 0x01204346,
|
|
0x00186346, 0x01186346, 0x00206346, 0x01206346,
|
|
};
|
|
}
|
|
|
|
public override ImageMetaData ReadMetaData (IBinaryStream file)
|
|
{
|
|
var header = file.ReadHeader (8);
|
|
if (header[0] != 'F' || (header[1] & 0xDF) != 'C')
|
|
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);
|
|
}
|
|
|
|
unsafe internal static bool Checksum (byte[] input) // for reference
|
|
{
|
|
int length = (input.Length - 1) / 4;
|
|
fixed (byte* data8 = &input[0])
|
|
{
|
|
uint* data32 = (uint*)data8;
|
|
uint checksum = 0x8801;
|
|
for (int i = 0; i < length; ++i)
|
|
{
|
|
checksum += data32[i];
|
|
}
|
|
byte sum = (byte)(checksum ^ (checksum >> 8) ^ (checksum >> 16) ^ (checksum >> 24));
|
|
return input[input.Length-1] == sum;
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|