(AgReader): tidied code.

This commit is contained in:
morkt 2018-02-08 10:54:11 +04:00
parent 3ca174ca39
commit 5bd4b5df02

View File

@ -2,7 +2,7 @@
//! \date Sun May 10 23:53:34 2015
//! \brief Masys Enhanced Game Unit image format.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2018 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
@ -27,7 +27,6 @@ using System;
using System.ComponentModel.Composition;
using System.Windows.Media;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Megu
{
@ -65,11 +64,11 @@ namespace GameRes.Formats.Megu
internal class AgReader
{
byte[] in1;
byte[] in2;
byte[] in3;
byte[] in4;
byte[] in5;
AgBitStream in1;
AgBitStream in2;
AgBitStream in3;
AgBitStream in4;
AgBitStream in5;
byte[] m_alpha;
byte[] m_output;
int m_width;
@ -99,15 +98,15 @@ namespace GameRes.Formats.Megu
int size6 = input.ReadInt32();
input.Read (m_first, 0, 3);
if (size1 != 0)
in1 = ReadSection (input, offset1, size1);
in1 = new AgBitStream (input, offset1, size1);
if (size2 != 0)
in2 = ReadSection (input, offset2, size2);
in2 = new AgBitStream (input, offset2, size2);
if (size3 != 0)
in3 = ReadSection (input, offset3, size3);
in3 = new AgBitStream (input, offset3, size3);
if (size4 != 0)
in4 = ReadSection (input, offset4, size4);
in4 = new AgBitStream (input, offset4, size4);
if (size5 != 0)
in5 = ReadSection (input, offset5, size5);
in5 = new AgBitStream (input, offset5, size5);
if (size6 != 0)
{
input.Position = offset6;
@ -124,7 +123,7 @@ namespace GameRes.Formats.Megu
m_output = new byte[m_width*m_height*m_pixel_size];
}
static private byte[] ReadSection (IBinaryStream input, long offset, int size)
static internal byte[] ReadSection (IBinaryStream input, long offset, int size)
{
input.Position = offset;
var buf = new byte[size + 4];
@ -135,203 +134,16 @@ namespace GameRes.Formats.Megu
public void Unpack ()
{
int bit_mask = 1;
int src1 = 0;
uint v25 = LittleEndian.ToUInt32 (in1, src1);
src1 += 4;
int v5 = 1;
int src2 = 0;
uint v24 = LittleEndian.ToUInt32 (in2, src2);
src2 += 4;
int v4 = 1;
int src3 = 0;
uint v23 = LittleEndian.ToUInt32 (in3, src3);
src3 += 4;
int v3 = 0;
int src4 = 0;
uint v22 = LittleEndian.ToUInt32 (in4, src4);
src4 += 4;
int v19 = 0;
int src5 = 0;
uint v21 = LittleEndian.ToUInt32 (in5, src5);
src5 += 4;
byte B;
byte G;
byte R;
int dst = 0;
int stride = m_width * m_pixel_size;
for (int y = 0; y < m_height; ++y)
{
int dst = y * stride;
for (int x = 0; x < stride; x += m_pixel_size)
{
if (0 != (bit_mask & v25))
{
B = (byte)(v21 >> v19);
v19 += 8;
if (32 == v19)
{
v21 = LittleEndian.ToUInt32 (in5, src5);
src5 += 4;
v19 = 0;
}
}
else
{
if (0 != (v4 & v23))
{
B = m_first[0];
}
else
{
B = (byte)((v22 >> v3) & 0xF);
v3 += 4;
if (32 == v3)
{
v22 = LittleEndian.ToUInt32 (in4, src4);
src4 += 4;
v3 = 0;
}
++B;
if (0 != (v5 & v24))
B = (byte)(m_first[0] - B);
else
B += m_first[0];
v5 <<= 1;
if (0 == v5)
{
v5 = 1;
v24 = LittleEndian.ToUInt32 (in2, src2);
src2 += 4;
}
}
v4 <<= 1;
if (0 == v4)
{
v4 = 1;
v23 = LittleEndian.ToUInt32 (in3, src3);
src3 += 4;
}
}
bit_mask <<= 1;
if (0 == bit_mask)
{
v25 = LittleEndian.ToUInt32 (in1, src1);
src1 += 4;
bit_mask = 1;
}
if (0 != (bit_mask & v25))
{
G = (byte)(v21 >> v19);
v19 += 8;
if (32 == v19)
{
v21 = LittleEndian.ToUInt32 (in5, src5);
src5 += 4;
v19 = 0;
}
}
else
{
if (0 != (v4 & v23))
{
G = m_first[1];
}
else
{
G = (byte)((v22 >> v3) & 0xF);
v3 += 4;
if (32 == v3)
{
v22 = LittleEndian.ToUInt32 (in4, src4);
src4 += 4;
v3 = 0;
}
++G;
if (0 != (v5 & v24))
G = (byte)(m_first[1] - G);
else
G += m_first[1];
v5 <<= 1;
if (0 == v5)
{
v5 = 1;
v24 = LittleEndian.ToUInt32 (in2, src2);
src2 += 4;
}
}
v4 <<= 1;
if (0 == v4)
{
v4 = 1;
v23 = LittleEndian.ToUInt32 (in3, src3);
src3 += 4;
}
}
bit_mask <<= 1;
if (0 == bit_mask)
{
v25 = LittleEndian.ToUInt32 (in1, src1);
src1 += 4;
bit_mask = 1;
}
if (0 != (bit_mask & v25))
{
R = (byte)(v21 >> v19);
v19 += 8;
if (32 == v19)
{
v21 = LittleEndian.ToUInt32 (in5, src5);
src5 += 4;
v19 = 0;
}
}
else
{
if (0 != (v4 & v23))
{
R = m_first[2];
}
else
{
R = (byte)((v22 >> v3) & 0xF);
v3 += 4;
if (32 == v3)
{
v22 = LittleEndian.ToUInt32 (in4, src4);
src4 += 4;
v3 = 0;
}
++R;
if (0 != (v5 & v24))
R = (byte)(m_first[2] - R);
else
R += m_first[2];
v5 <<= 1;
if (0 == v5)
{
v5 = 1;
v24 = LittleEndian.ToUInt32 (in2, src2);
src2 += 4;
}
}
v4 <<= 1;
if (0 == v4)
{
v4 = 1;
v23 = LittleEndian.ToUInt32 (in3, src3);
src3 += 4;
}
}
bit_mask <<= 1;
if (0 == bit_mask)
{
v25 = LittleEndian.ToUInt32 (in1, src1);
src1 += 4;
bit_mask = 1;
}
m_output[dst+x] = B;
byte B = ReadColor (0);
byte G = ReadColor (1);
byte R = ReadColor (2);
m_output[dst+x ] = B;
m_output[dst+x+1] = G;
m_output[dst+x+2] = R;
m_first[0] = B;
@ -341,11 +153,34 @@ namespace GameRes.Formats.Megu
m_first[0] = m_output[dst];
m_first[1] = m_output[dst+1];
m_first[2] = m_output[dst+2];
dst += stride;
}
if (m_alpha != null)
ApplyAlpha();
}
private byte ReadColor (int channel)
{
byte c;
if (0 != in1.GetBit())
{
c = in5.GetByte();
}
else if (0 != in3.GetBit())
{
c = m_first[channel];
}
else
{
c = (byte)(in4.GetNibble() + 1);
if (0 != in2.GetBit())
c = (byte)(m_first[channel] - c);
else
c += m_first[channel];
}
return c;
}
private void ApplyAlpha ()
{
int src = 0;
@ -382,4 +217,43 @@ namespace GameRes.Formats.Megu
}
}
}
internal class AgBitStream
{
byte[] m_input;
int m_src = 0;
int m_bits = 1;
public AgBitStream (IBinaryStream input, long offset, int size)
{
m_input = AgReader.ReadSection (input, offset, size);
}
public int GetBit ()
{
if (1 == m_bits)
{
m_bits = m_input[m_src++] | 0x100;
}
int bit = m_bits & 1;
m_bits >>= 1;
return bit;
}
public int GetNibble ()
{
if (1 == m_bits)
{
m_bits = m_input[m_src++] | 0x100;
}
int bits = m_bits & 0xF;
m_bits >>= 4;
return bits;
}
public byte GetByte ()
{
return m_input[m_src++];
}
}
}