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(DdsFormat.ReadPixelData): generalized.

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This commit is contained in:
morkt 2016-03-12 23:21:55 +04:00
parent 56595fb4c2
commit b569c81c50
1 changed files with 18 additions and 6 deletions
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24
ArcFormats/ImageDDS.cs
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@ -117,17 +117,29 @@ namespace GameRes.Formats.Microsoft
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;
Func<int, uint> get_pixel;
if (8 == info.BPP)
get_pixel = x => input[x];
else if (info.BPP <= 16)
get_pixel = x => LittleEndian.ToUInt16 (input, x);
else
get_pixel = x => LittleEndian.ToUInt32 (input, x);
Func<uint, uint, byte> convert_pixel;
if (info.BPP > 24)
convert_pixel = (p, mask) => (byte)((p & mask) * 0xFFL / mask);
else
convert_pixel = (p, mask) => (byte)((p & mask) * 0xFFu / mask);
bool has_alpha = info.PixelFlags.HasFlag (DdsPF.AlphaPixels) && info.ABitMask != 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);
uint src_pixel = get_pixel (src);
output[dst++] = convert_pixel (src_pixel, info.BBitMask);
output[dst++] = convert_pixel (src_pixel, info.GBitMask);
output[dst++] = convert_pixel (src_pixel, info.RBitMask);
if (has_alpha)
output[dst] = (byte)((src_pixel & info.ABitMask) * 0xFFu / info.ABitMask);
output[dst] = convert_pixel (src_pixel, info.ABitMask);
dst++;
}
return output;