Xune/UIX.RenderApi.Skia/Microsoft/Iris/Render/Protocol/Memory.cs

// Decompiled with JetBrains decompiler
// Type: Microsoft.Iris.Render.Protocol.Memory
// Assembly: UIX.RenderApi, Version=4.8.0.0, Culture=neutral, PublicKeyToken=ddd0da4d3e678217
// MVID: D47658B8-A8EA-43D6-8837-ECE823BFFFC1
// Assembly location: C:\Program Files\Zune\UIX.RenderApi.dll

using Microsoft.Iris.Render.Common;
using System;

namespace Microsoft.Iris.Render.Protocol
{
  internal static class Memory
  {
    public static unsafe bool IsOverlap(IntPtr pvA, int cbA, IntPtr pvB, int cbB)
    {
      byte* pointer1 = (byte*) pvA.ToPointer();
      byte* pointer2 = (byte*) pvB.ToPointer();
      if (pointer1 >= pointer2 && pointer1 < pointer2 + cbB)
        return true;
      return pointer2 >= pointer1 && pointer2 < pointer1 + cbA;
    }

    public static unsafe void Zero(IntPtr pvDest, int cbZero)
    {
      uint* pointer = (uint*) pvDest.ToPointer();
      int num1 = cbZero / 4;
      int num2 = num1;
      while (num2-- > 0)
        *pointer++ = 0U;
      byte* numPtr = (byte*) pointer;
      int num3 = cbZero - num1 * 4;
      while (num3-- > 0)
        *numPtr++ = (byte) 0;
    }

    public static unsafe void Copy(IntPtr pvDest, IntPtr pvSrc, int cbCopy)
    {
      uint* pointer1 = (uint*) pvDest.ToPointer();
      uint* pointer2 = (uint*) pvSrc.ToPointer();
      int num1 = cbCopy / 4;
      int num2 = num1;
      while (num2-- > 0)
        *pointer1++ = *pointer2++;
      byte* numPtr1 = (byte*) pointer1;
      byte* numPtr2 = (byte*) pointer2;
      int num3 = cbCopy - num1 * 4;
      while (num3-- > 0)
        *numPtr1++ = *numPtr2++;
    }

    public static unsafe void ConvertEndian(
      IntPtr pvDest,
      IntPtr pvSrc,
      int cbConvert,
      int cUnitBits)
    {
      switch (cUnitBits)
      {
        case 8:
          break;
        case 16:
          uint* pointer1 = (uint*) pvDest.ToPointer();
          uint* pointer2 = (uint*) pvSrc.ToPointer();
          int num1 = cbConvert / 4;
          while (num1-- > 0)
          {
            uint num2 = *pointer2++;
            *pointer1++ = (uint) ((int) ((num2 & 4278190080U) >> 8) | ((int) num2 & 16711680) << 8 | (int) ((num2 & 65280U) >> 8) | ((int) num2 & (int) byte.MaxValue) << 8);
          }
          if (cbConvert % 4 == 0)
            break;
          ushort* numPtr1 = (ushort*) pointer1;
          ushort* numPtr2 = (ushort*) pointer1;
          ushort* numPtr3 = (ushort*) ((IntPtr) numPtr2 + new IntPtr(2));
          ushort num3 = *numPtr2;
          ushort* numPtr4 = numPtr1;
          ushort* numPtr5 = (ushort*) ((IntPtr) numPtr4 + new IntPtr(2));
          int num4 = (int) (ushort) (((int) num3 & 65280) >> 8 | ((int) num3 & (int) byte.MaxValue) << 8);
          *numPtr4 = (ushort) num4;
          break;
        case 32:
          uint* pointer3 = (uint*) pvDest.ToPointer();
          uint* pointer4 = (uint*) pvSrc.ToPointer();
          int num5 = cbConvert / 4;
          while (num5-- > 0)
          {
            uint num2 = *pointer4++;
            *pointer3++ = (uint) ((int) ((num2 & 4278190080U) >> 24) | (int) ((num2 & 16711680U) >> 8) | ((int) num2 & 65280) << 8 | ((int) num2 & (int) byte.MaxValue) << 24);
          }
          break;
        default:
          Debug2.Throw(false, "Unsupported data format");
          break;
      }
    }

    public static uint ConvertEndian(uint src) => (uint) ((int) ((src & 4278190080U) >> 24) | (int) ((src & 16711680U) >> 8) | ((int) src & 65280) << 8 | ((int) src & (int) byte.MaxValue) << 24);
  }
}