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(GrxFormat): fixed alpha channel handling.

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This commit is contained in:
morkt 2016-06-24 09:48:22 +04:00
parent 49c66fecc2
commit 554ec7edce
1 changed files with 50 additions and 24 deletions
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64
ArcFormats/UMeSoft/ImageGRX.cs
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@ -2,7 +2,7 @@
//! \date Wed Jul 15 00:59:44 2015
//! \brief U-Me Soft 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
@ -63,11 +63,7 @@ namespace GameRes.Formats.UMeSoft
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as GrxMetaData;
if (null == meta)
throw new ArgumentException ("GrxFormat.Read should be supplied with GrxMetaData", "info");
var reader = new Reader (stream, meta);
var reader = new Reader (stream, (GrxMetaData)info);
reader.Unpack();
return ImageData.Create (info, reader.Format, null, reader.Data, reader.Stride);
}
@ -83,7 +79,7 @@ namespace GameRes.Formats.UMeSoft
byte[] m_output;
GrxMetaData m_info;
int m_pixel_size;
uint m_aligned_width;
int m_aligned_width;
public byte[] Data { get { return m_output; } }
public PixelFormat Format { get; private set; }
@ -93,7 +89,6 @@ namespace GameRes.Formats.UMeSoft
{
m_input = input;
m_info = info;
m_input.Seek (0x10, SeekOrigin.Current);
m_pixel_size = m_info.BPP / 8;
switch (m_info.BPP)
{
@ -113,35 +108,69 @@ namespace GameRes.Formats.UMeSoft
default:
throw new InvalidFormatException();
}
m_aligned_width = (m_info.Width + 3u) & ~3u;
Stride = (int)(m_aligned_width * m_pixel_size);
m_aligned_width = ((int)m_info.Width + 3) & ~3;
Stride = m_aligned_width * m_pixel_size;
m_output = new byte[Stride * (int)info.Height];
}
public void Unpack ()
{
m_input.Position = 0x10;
if (!m_info.IsPacked)
m_input.Read (m_output, 0, m_output.Length);
else
UnpackColorData (m_output, m_info.BPP/8, m_pixel_size);
if (m_info.BPP >= 24 && m_info.HasAlpha && m_info.AlphaOffset > 0)
if (m_info.HasAlpha && m_info.AlphaOffset > 0)
{
Format = PixelFormats.Bgra32;
m_input.Position = m_info.AlphaOffset;
var alpha = new byte[m_aligned_width * m_info.Height];
m_input.Position = 0x10 + m_info.AlphaOffset;
var alpha = new byte[m_aligned_width * (int)m_info.Height];
UnpackColorData (alpha, 1, 1);
if (m_info.BPP >= 24)
{
int dst = 3;
int src = 0;
for (uint y = 0; y < m_info.Height; ++y)
{
for (uint x = 0; x < m_aligned_width; ++x)
for (int x = 0; x < m_aligned_width; ++x)
{
m_output[dst] = alpha[src++];
dst += 4;
}
}
Format = PixelFormats.Bgra32;
}
else if (16 == m_info.BPP)
ApplyAlpha16bpp (alpha);
}
}
void ApplyAlpha16bpp (byte[] alpha)
{
int dst_stride = m_aligned_width * 4;
var pixels = new byte[dst_stride * (int)m_info.Height];
int src = 0;
int dst = 0;
int gap = dst_stride - (int)m_info.Width * 4;
int a = 0;
for (uint y = 0; y < m_info.Height; ++y)
{
for (int x = 0; x < m_info.Width; ++x)
{
int pixel = LittleEndian.ToUInt16 (m_output, src + x*2);
pixels[dst++] = (byte)((pixel & 0x001F) * 0xFF / 0x001F);
pixels[dst++] = (byte)((pixel & 0x07E0) * 0xFF / 0x07E0);
pixels[dst++] = (byte)((pixel & 0xF800) * 0xFF / 0xF800);
pixels[dst++] = alpha[a+x];
}
dst += gap;
src += Stride;
a += m_aligned_width;
}
m_pixel_size = 4;
Stride = dst_stride;
m_output = pixels;
Format = PixelFormats.Bgra32;
}
static readonly int[,] OffsetTable = new int[2,16] {
@ -287,10 +316,7 @@ namespace GameRes.Formats.UMeSoft
public override ImageData Read (Stream stream, ImageMetaData info)
{
var meta = info as SgxMetaData;
if (null == meta)
throw new ArgumentException ("SgxFormat.Read should be supplied with SgxMetaData", "info");
var meta = (SgxMetaData)info;
stream.Position = meta.GrxOffset;
return base.Read (stream, meta.GrxInfo);
}