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(BMP): refined detection of bitmaps with alpha channel.

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This commit is contained in:
morkt 2016-07-26 07:05:02 +04:00
parent 1922c42ae2
commit 5a858cf42d
1 changed files with 12 additions and 9 deletions
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21
GameRes/ImageBMP.cs
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@ -49,17 +49,20 @@ namespace GameRes
public override ImageData Read (Stream file, ImageMetaData info)
{
var bmp_info = info as BmpMetaData;
if (bmp_info != null && file.CanSeek
&& info.Width * info.Height * (uint)info.BPP/8 + bmp_info.HeaderLength == bmp_info.ImageLength)
if (bmp_info != null && file.CanSeek)
{
if (0x20 == info.BPP)
uint bmp_length = info.Width * info.Height * (uint)info.BPP/8 + bmp_info.HeaderLength;
if (bmp_length == bmp_info.ImageLength || bmp_length+2 == bmp_info.ImageLength)
{
return ReadBitmapBGRA (file, bmp_info);
}
else if (0x18 == info.BPP
&& (bmp_info.ImageLength + info.Width * info.Height) == file.Length)
{
return ReadBitmapWithAlpha (file, bmp_info);
if (0x20 == info.BPP)
{
return ReadBitmapBGRA (file, bmp_info);
}
else if (0x18 == info.BPP
&& (bmp_info.ImageLength + info.Width * info.Height) == file.Length)
{
return ReadBitmapWithAlpha (file, bmp_info);
}
}
}
var decoder = new BmpBitmapDecoder (file,