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Code Issues Projects Releases Wiki Activity

(IAF): implemented older format and fixed alpha channel handling.

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This commit is contained in:
morkt 2016-06-28 20:24:38 +04:00
parent 3e8c921493
commit d3fa6c005d
1 changed files with 43 additions and 8 deletions
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51
ArcFormats/Triangle/ImageIAF.cs
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@ -2,7 +2,7 @@
//! \date Sun May 31 21:17:54 2015
//! \brief IAF image format.
//
// Copyright (C) 2015 by morkt
// Copyright (C) 2015-2016 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
@ -53,10 +53,12 @@ namespace GameRes.Formats.Triangle
if (12 != stream.Read (header, 0, 12))
return null;
int data_offset;
int packed_size = LittleEndian.ToInt32 (header, 1);
int x, y, unpacked_size;
if (5+packed_size+0x14 == stream.Length)
int packed_size0 = LittleEndian.ToInt32 (header, 0);
int packed_size1 = LittleEndian.ToInt32 (header, 1);
int x, y, packed_size, unpacked_size;
if (5+packed_size1+0x14 == stream.Length)
{
packed_size = packed_size1;
data_offset = 5;
stream.Seek (-0x14, SeekOrigin.End);
if (0x14 != stream.Read (header, 0, 0x14))
@ -65,13 +67,24 @@ namespace GameRes.Formats.Triangle
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 0x10);
}
else if (4+packed_size0+0xC == stream.Length)
{
packed_size = packed_size0;
data_offset = 4;
stream.Seek (-12, SeekOrigin.End);
if (12 != stream.Read (header, 0, 12))
return null;
x = LittleEndian.ToInt32 (header, 0);
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 8);
}
else
{
packed_size = (int)stream.Length-12;
data_offset = 12;
x = LittleEndian.ToInt32 (header, 0);
y = LittleEndian.ToInt32 (header, 4);
unpacked_size = LittleEndian.ToInt32 (header, 8);
packed_size = (int)stream.Length-12;
}
if (Math.Abs (x) > 4096 || Math.Abs (y) > 4096)
return null;
@ -171,10 +184,32 @@ namespace GameRes.Formats.Triangle
static ImageData BitmapWithAlphaChannel (ImageMetaData info, byte[] bitmap, int alpha_offset)
{
int src_pixel_size = info.BPP/8;
int src_stride = (int)info.Width*src_pixel_size;
int info_offset = alpha_offset+0x0E;
int palette_offset = info_offset + LittleEndian.ToInt32 (bitmap, info_offset);
int src_pixels = LittleEndian.ToInt32 (bitmap, 0x0A);
int src_alpha = alpha_offset + LittleEndian.ToInt32 (bitmap, alpha_offset+0x0A);
int colors = (src_alpha - palette_offset) / 4;
var alpha_map = new byte[0x100];
if (colors > 0)
{
for (int i = 0; i < colors; ++i)
{
byte b = bitmap[palette_offset];
byte g = bitmap[palette_offset+1];
byte r = bitmap[palette_offset+2];
alpha_map[i] = (byte)((b + g + r) / 3);
palette_offset += 4;
}
}
else
{
for (int i = 0; i < 0x100; ++i)
alpha_map[i] = (byte)i;
}
int src_pixel_size = info.BPP/8;
int src_stride = (int)info.Width*src_pixel_size;
var pixels = new byte[info.Width * info.Height * 4];
int dst = 0;
for (int y = (int)info.Height-1; y >= 0; --y)
@ -186,7 +221,7 @@ namespace GameRes.Formats.Triangle
pixels[dst++] = bitmap[src];
pixels[dst++] = bitmap[src+1];
pixels[dst++] = bitmap[src+2];
pixels[dst++] = (byte)~bitmap[alpha++];
pixels[dst++] = (byte)~alpha_map[bitmap[alpha++]];
src += src_pixel_size;
}
}