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(GrxFormat): fixed alpha channel handling.
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@ -2,7 +2,7 @@
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//! \date Wed Jul 15 00:59:44 2015
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//! \brief U-Me Soft image format.
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//
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// Copyright (C) 2015 by morkt
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// Copyright (C) 2015-2016 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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@ -63,11 +63,7 @@ namespace GameRes.Formats.UMeSoft
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as GrxMetaData;
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if (null == meta)
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throw new ArgumentException ("GrxFormat.Read should be supplied with GrxMetaData", "info");
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var reader = new Reader (stream, meta);
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var reader = new Reader (stream, (GrxMetaData)info);
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reader.Unpack();
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return ImageData.Create (info, reader.Format, null, reader.Data, reader.Stride);
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}
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@ -83,7 +79,7 @@ namespace GameRes.Formats.UMeSoft
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byte[] m_output;
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GrxMetaData m_info;
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int m_pixel_size;
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uint m_aligned_width;
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int m_aligned_width;
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public byte[] Data { get { return m_output; } }
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public PixelFormat Format { get; private set; }
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@ -93,7 +89,6 @@ namespace GameRes.Formats.UMeSoft
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{
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m_input = input;
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m_info = info;
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m_input.Seek (0x10, SeekOrigin.Current);
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m_pixel_size = m_info.BPP / 8;
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switch (m_info.BPP)
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{
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@ -113,37 +108,71 @@ namespace GameRes.Formats.UMeSoft
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default:
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throw new InvalidFormatException();
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}
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m_aligned_width = (m_info.Width + 3u) & ~3u;
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Stride = (int)(m_aligned_width * m_pixel_size);
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m_aligned_width = ((int)m_info.Width + 3) & ~3;
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Stride = m_aligned_width * m_pixel_size;
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m_output = new byte[Stride * (int)info.Height];
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}
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public void Unpack ()
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{
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m_input.Position = 0x10;
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if (!m_info.IsPacked)
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m_input.Read (m_output, 0, m_output.Length);
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else
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UnpackColorData (m_output, m_info.BPP/8, m_pixel_size);
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if (m_info.BPP >= 24 && m_info.HasAlpha && m_info.AlphaOffset > 0)
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if (m_info.HasAlpha && m_info.AlphaOffset > 0)
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{
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Format = PixelFormats.Bgra32;
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m_input.Position = m_info.AlphaOffset;
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var alpha = new byte[m_aligned_width * m_info.Height];
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m_input.Position = 0x10 + m_info.AlphaOffset;
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var alpha = new byte[m_aligned_width * (int)m_info.Height];
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UnpackColorData (alpha, 1, 1);
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int dst = 3;
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int src = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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if (m_info.BPP >= 24)
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{
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for (uint x = 0; x < m_aligned_width; ++x)
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int dst = 3;
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int src = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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{
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m_output[dst] = alpha[src++];
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dst += 4;
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for (int x = 0; x < m_aligned_width; ++x)
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{
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m_output[dst] = alpha[src++];
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dst += 4;
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}
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}
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Format = PixelFormats.Bgra32;
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}
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else if (16 == m_info.BPP)
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ApplyAlpha16bpp (alpha);
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}
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}
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void ApplyAlpha16bpp (byte[] alpha)
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{
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int dst_stride = m_aligned_width * 4;
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var pixels = new byte[dst_stride * (int)m_info.Height];
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int src = 0;
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int dst = 0;
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int gap = dst_stride - (int)m_info.Width * 4;
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int a = 0;
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for (uint y = 0; y < m_info.Height; ++y)
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{
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for (int x = 0; x < m_info.Width; ++x)
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{
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int pixel = LittleEndian.ToUInt16 (m_output, src + x*2);
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pixels[dst++] = (byte)((pixel & 0x001F) * 0xFF / 0x001F);
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pixels[dst++] = (byte)((pixel & 0x07E0) * 0xFF / 0x07E0);
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pixels[dst++] = (byte)((pixel & 0xF800) * 0xFF / 0xF800);
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pixels[dst++] = alpha[a+x];
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}
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dst += gap;
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src += Stride;
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a += m_aligned_width;
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}
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m_pixel_size = 4;
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Stride = dst_stride;
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m_output = pixels;
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Format = PixelFormats.Bgra32;
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}
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static readonly int[,] OffsetTable = new int[2,16] {
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{ 0, -1, -1, -1, 0, -2, -2, -2, 0, -4, -4, -4, -2, -2, -4, -4 },
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{ 0, 0, -1, 1, -2, 0, -2, 2, -4, 0, -4, 4, -4, 4, -2, 2 },
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@ -287,10 +316,7 @@ namespace GameRes.Formats.UMeSoft
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public override ImageData Read (Stream stream, ImageMetaData info)
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{
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var meta = info as SgxMetaData;
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if (null == meta)
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throw new ArgumentException ("SgxFormat.Read should be supplied with SgxMetaData", "info");
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var meta = (SgxMetaData)info;
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stream.Position = meta.GrxOffset;
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return base.Read (stream, meta.GrxInfo);
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}
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