private int AllocateMipMaps()
{
var len = HeightBlocks * DivSize * DeflatedStrideBytes;
if (Header.MipMapCount <= 1)
{
return(len);
}
_mipMaps = new MipMapOffset[Header.MipMapCount - 1];
var totalLen = len;
for (int i = 1; i < Header.MipMapCount; i++)
{
var width = Math.Max((int)(Header.Width / Math.Pow(2, i)), 1);
var height = Math.Max((int)(Header.Height / Math.Pow(2, i)), 1);
var widthBlocks = CalcBlocks(width);
var heightBlocks = CalcBlocks(height);
var stridePixels = widthBlocks * DivSize;
var stride = stridePixels * PixelDepthBytes;
len = heightBlocks * DivSize * stride;
_mipMaps[i - 1] = new MipMapOffset(width, height, stride, totalLen, len);
totalLen += len;
}
return(totalLen);
}
private int AllocateMipMaps(DdsLoadInfo info)
{
var len = CalcSize(info);
if (Header.MipMapCount <= 1)
{
return(len);
}
_mipMaps = new MipMapOffset[Header.MipMapCount - 1];
var totalLen = len;
for (int i = 0; i < Header.MipMapCount - 1; i++)
{
int width = (int)Math.Max(info.DivSize, (int)(Header.Width / Math.Pow(2, i + 1)));
int height = (int)Math.Max(info.DivSize, Header.Height / Math.Pow(2, i + 1));
int stride = Util.Stride(width, BitsPerPixel);
len = stride * height;
_mipMaps[i] = new MipMapOffset(width, height, stride, totalLen, len);
totalLen += len;
}
return(totalLen);
}