38 lines
1.1 KiB
C#
38 lines
1.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Toolbox.Library
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{
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public class TextureHelper
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{
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public static Tuple<uint, uint> GetCurrentMipSize(uint width, uint height, uint blkWidth, uint blkHeight, uint bpp, int CurLevel)
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{
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uint offset = 0;
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uint width_ = 0;
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uint height_ = 0;
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for (int mipLevel = 0; mipLevel < CurLevel; mipLevel++)
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{
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width_ = DIV_ROUND_UP(Math.Max(1, width >> mipLevel), blkWidth);
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height_ = DIV_ROUND_UP(Math.Max(1, height >> mipLevel), blkHeight);
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offset += width_ * height_ * bpp;
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}
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width_ = DIV_ROUND_UP(Math.Max(1, width >> CurLevel), blkWidth);
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height_ = DIV_ROUND_UP(Math.Max(1, height >> CurLevel), blkHeight);
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uint size = width_ * height_ * bpp;
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return Tuple.Create(offset, size);
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}
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private static uint DIV_ROUND_UP(uint n, uint d)
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{
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return (n + d - 1) / d;
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}
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}
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}
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