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(DdsFormat): interpret non-A8R8G8B8 textures.

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This commit is contained in:
morkt 2016-03-12 20:46:40 +04:00
parent 8ff550c344
commit 56595fb4c2
1 changed files with 40 additions and 10 deletions
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50
ArcFormats/ImageDDS.cs
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@ -37,6 +37,10 @@ namespace GameRes.Formats.Microsoft
public int DataOffset;
public DdsPF PixelFlags;
public string FourCC;
public uint RBitMask;
public uint GBitMask;
public uint BBitMask;
public uint ABitMask;
}
[Flags]
@ -59,7 +63,7 @@ namespace GameRes.Formats.Microsoft
public override ImageMetaData ReadMetaData (Stream stream)
{
var header = new byte[0x5C];
var header = new byte[0x6C];
if (header.Length != stream.Read (header, 0, header.Length))
return null;
int dwSize = LittleEndian.ToInt32 (header, 4);
@ -76,6 +80,10 @@ namespace GameRes.Formats.Microsoft
BPP = LittleEndian.ToInt32 (header, 0x58),
PixelFlags = bitflags,
FourCC = four_cc,
RBitMask = LittleEndian.ToUInt32 (header, 0x5C),
GBitMask = LittleEndian.ToUInt32 (header, 0x60),
BBitMask = LittleEndian.ToUInt32 (header, 0x64),
ABitMask = LittleEndian.ToUInt32 (header, 0x68),
DataOffset = 4 + dwSize,
};
}
@ -87,22 +95,44 @@ namespace GameRes.Formats.Microsoft
throw new NotSupportedException ("Not supported DDS texture color format");
if (!string.IsNullOrEmpty (meta.FourCC))
throw new NotImplementedException ("Compressed DDS textures not implemented");
if (meta.PixelFlags.HasFlag (DdsPF.Rgb)
&& (0 == meta.RBitMask || 0 == meta.GBitMask || 0 == meta.BBitMask))
throw new InvalidFormatException();
var pixels = ReadPixelData (stream, meta);
PixelFormat format;
if (24 == info.BPP)
format = PixelFormats.Bgr24;
else if (16 == info.BPP)
throw new NotImplementedException ("16bpp DDS textures not implemented");
else if (meta.PixelFlags.HasFlag (DdsPF.AlphaPixels))
if (meta.PixelFlags.HasFlag (DdsPF.AlphaPixels) && meta.ABitMask != 0)
format = PixelFormats.Bgra32;
else
format = PixelFormats.Bgr32;
stream.Position = meta.DataOffset;
var pixels = new byte[info.Width*info.Height*((format.BitsPerPixel+7)/8)];
if (pixels.Length != stream.Read (pixels, 0, pixels.Length))
throw new InvalidFormatException ("Unexpected end of file");
return ImageData.Create (info, format, null, pixels);
}
byte[] ReadPixelData (Stream stream, DdsMetaData info)
{
int src_pixel_size = (info.BPP+7) / 8;
int input_size = (int)info.Width*(int)info.Height*src_pixel_size;
var input = new byte[input_size+4];
stream.Position = info.DataOffset;
if (input_size != stream.Read (input, 0, input_size))
throw new InvalidFormatException ("Unexpected end of file");
if (32 == info.BPP && 0xFF0000 == info.RBitMask && 0x00FF00 == info.GBitMask && 0x0000FF == info.BBitMask)
return input;
bool has_alpha = info.PixelFlags.HasFlag (DdsPF.AlphaPixels) && info.ABitMask != 0;
var output = new byte[info.Width*info.Height*4];
int dst = 0;
for (int src = 0; src < input_size; src += src_pixel_size)
{
uint src_pixel = LittleEndian.ToUInt32 (input, src);
output[dst++] = (byte)((src_pixel & info.BBitMask) * 0xFFu / info.BBitMask);
output[dst++] = (byte)((src_pixel & info.GBitMask) * 0xFFu / info.GBitMask);
output[dst++] = (byte)((src_pixel & info.RBitMask) * 0xFFu / info.RBitMask);
if (has_alpha)
output[dst] = (byte)((src_pixel & info.ABitMask) * 0xFFu / info.ABitMask);
dst++;
}
return output;
}
public override void Write (Stream file, ImageData image)
{
throw new System.NotImplementedException ("DdsFormat.Write not implemented");