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(DDS): added DXT1 decoder.

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This commit is contained in:
morkt 2017-12-15 01:05:42 +04:00
parent 613481d391
commit 3233cdc18e
1 changed files with 9 additions and 6 deletions
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15
ArcFormats/DirectDraw/ImageDDS.cs
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@ -91,26 +91,29 @@ namespace GameRes.Formats.DirectDraw
var meta = (DdsMetaData)info;
if (meta.PixelFlags.HasFlag (DdsPF.Yuv | DdsPF.Luminance))
throw new NotSupportedException ("Not supported DDS texture color format");
stream.Position = meta.DataOffset;
byte[] pixels;
PixelFormat format;
PixelFormat format = PixelFormats.Bgra32;
if (string.IsNullOrEmpty (meta.FourCC))
{
if (meta.PixelFlags.HasFlag (DdsPF.Rgb)
&& (0 == meta.RBitMask || 0 == meta.GBitMask || 0 == meta.BBitMask))
throw new InvalidFormatException();
pixels = ReadPixelData (stream.AsStream, meta);
if (meta.PixelFlags.HasFlag (DdsPF.AlphaPixels) && meta.ABitMask != 0)
format = PixelFormats.Bgra32;
else
if (!meta.PixelFlags.HasFlag (DdsPF.AlphaPixels) || meta.ABitMask == 0)
format = PixelFormats.Bgr32;
}
else if ("DXT5" == meta.FourCC)
{
stream.Position = meta.DataOffset;
var input = stream.ReadBytes ((int)meta.Width * (int)meta.Height);
var dxt = new DxtDecoder (input, meta);
pixels = dxt.UnpackDXT5();
format = PixelFormats.Bgra32;
}
else if ("DXT1" == meta.FourCC)
{
var input = stream.ReadBytes ((int)meta.Width * (int)meta.Height / 2);
var dxt = new DxtDecoder (input, meta);
pixels = dxt.UnpackDXT1();
}
else
throw new NotImplementedException ("Compressed DDS textures not implemented");