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(SG): implemented sRGB images type 3.

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This commit is contained in:
morkt 2017-11-09 00:16:05 +04:00
parent 1d59b50ea1
commit dcedc79678
1 changed files with 40 additions and 0 deletions
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40
ArcFormats/Ivory/ImageSG.cs
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@ -169,6 +169,7 @@ namespace GameRes.Formats.Ivory
else
UnpackV2();
break;
case 3: UnpackV3(); break;
default:
throw new NotImplementedException (string.Format ("sRGB image type {0} not implemented", m_info.RgbMode));
}
@ -343,6 +344,45 @@ namespace GameRes.Formats.Ivory
}
}
void UnpackV3 ()
{
Format = 3 == m_channels ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
m_stride = m_width * m_channels;
m_output = new byte[m_stride * m_height];
var index = new int[m_height];
for (int i = 0; i < m_height; ++i)
index[i] = m_input.ReadInt32();
var data_pos = m_input.Position;
int dst = 0;
for (int y = 0; y < m_height; ++y)
{
m_input.Position = data_pos + index[y];
for (int x = 0; x < m_width; )
{
int ctl = m_input.ReadUInt8();
int count = ctl & 0x3F;
if (0 != (ctl & 0x40))
{
count <<= 8;
count |= m_input.ReadUInt8();
}
x += count;
count *= m_channels;
if (0 != (ctl & 0x80))
{
m_input.Read (m_output, dst, m_channels);
if (count > m_channels)
Binary.CopyOverlapped (m_output, dst, dst+m_channels, count - m_channels);
}
else
{
m_input.Read (m_output, dst, count);
}
dst += count;
}
}
}
#region IDisposable Members
public void Dispose ()
{