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(BgiFormat): restore scrambled pixels.

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This commit is contained in:
morkt 2018-08-31 04:32:13 +04:00
parent 36544eddd0
commit 75d7d3307d
1 changed files with 55 additions and 8 deletions
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63
ArcFormats/Ethornell/ImageBGI.cs
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@ -34,6 +34,11 @@ using System.Threading.Tasks;
namespace GameRes.Formats.BGI
{
internal class BgiMetaData : ImageMetaData
{
public bool IsScrambled;
}
[Export(typeof(ImageFormat))]
public class BgiFormat : ImageFormat
{
@ -43,7 +48,7 @@ namespace GameRes.Formats.BGI
public BgiFormat ()
{
Extensions = new string[] { "", "bgi" };
Extensions = new string[] { "", "bgi", "_bg" };
}
public override void Write (Stream file, ImageData image)
@ -57,21 +62,26 @@ namespace GameRes.Formats.BGI
int height = stream.ReadInt16();
if (width <= 0 || height <= 0)
return null;
int bpp = stream.ReadInt32();
int bpp = stream.ReadInt16();
if (24 != bpp && 32 != bpp && 8 != bpp)
return null;
int flag = stream.ReadInt16();
if (flag != 1 && flag != 0)
return null;
if (0 != stream.ReadInt64())
return null;
return new ImageMetaData
return new BgiMetaData
{
Width = (uint)width,
Height = (uint)height,
BPP = bpp,
IsScrambled = flag != 0,
};
}
public override ImageData Read (IBinaryStream stream, ImageMetaData info)
{
var meta = (BgiMetaData)info;
PixelFormat format;
if (24 == info.BPP)
format = PixelFormats.Bgr24;
@ -79,14 +89,51 @@ namespace GameRes.Formats.BGI
format = PixelFormats.Bgra32;
else
format = PixelFormats.Gray8;
int stride = (int)info.Width*((info.BPP+7)/8);
var pixels = new byte[stride*info.Height];
int stride = (int)info.Width * ((info.BPP+7)/8);
var pixels = new byte[stride * (int)info.Height];
stream.Position = 0x10;
int read = stream.Read (pixels, 0, pixels.Length);
if (read != pixels.Length)
throw new InvalidFormatException();
if (!meta.IsScrambled)
{
int read = stream.Read (pixels, 0, pixels.Length);
if (read != pixels.Length)
throw new InvalidFormatException();
}
else
{
RestorePixels (stream, pixels, meta);
}
return ImageData.Create (info, format, null, pixels, stride);
}
void RestorePixels (IBinaryStream input, byte[] output, BgiMetaData info)
{
int bpp = info.BPP / 8;
int stride = (int)info.Width * bpp;
for (int i = 0; i < bpp; ++i)
{
int dst = i;
byte incr = 0;
for (int h = (int)info.Height; h > 0; --h)
{
for (uint w = 0; w < info.Width; ++w)
{
incr += input.ReadUInt8();
output[dst] = incr;
dst += bpp;
}
if (--h == 0)
break;
dst += stride;
int pos = dst;
for (uint w = 0; w < info.Width; ++w)
{
pos -= bpp;
incr += input.ReadUInt8();
output[pos] = incr;
}
}
}
}
}
internal class CbgMetaData : ImageMetaData