PNG encoder throws an exception on x64

[hishamco]

Seems there's a lake on supporting this on 64 bit, for more details, please refer to OrchardCMS/OrchardCore#6414

[antonfirsov]

@hishamco to make it actionable for us, can you please:

1. Fill the issue template, making sure you include:

• The exact type of your CPU
• .NET Core version
• OS version

2. Provide the PNG you are trying to resize. Note: based on stack trace, the issue is in the PNG encoder.

[ArieGato]

Steps to Reproduce

fire the following request to OrchardCore: https://my.domain/media/myimage.png?width=100

System Configuration

• ImageSharp version:
  SixLabors.ImageSharp 1.0.0-rc0002

• Other ImageSharp packages and versions:
  SixLabors.ImageSharp.Web 1.0.0-rc0003

• Environment (Operating system, version and so on):

Published the web site in devops

- task: DotNetCoreCLI@2
  inputs:
    command: 'publish'
    publishWebProjects: false
    projects: '**/CmsWeb.csproj'
    arguments: '-o $(Build.ArtifactStagingDirectory) -r win-x64 --self-contained'

windows server 64 bit.
.net core 3.1.5

It fails for all the png files I tested, but here's an example.

[JimBobSquarePants]

Throwing line is here.

ImageSharp/src/ImageSharp/Formats/Png/Zlib/Adler32.cs

Line 133 in 0890bca

Vector128<short> mad1 = Ssse3.MultiplyAddAdjacent(bytes1, tap1);

The fix should be simple. I'm checking for Sse3 not the correct supplementary Ssse3 support.

Ssse3.MultiplyAddAdjacent.MultiplyAddAdjacent(Vector128<byte> left, Vector128<sbyte> right)

[sebastienros]

Would this happen on any Windows machine or does it depend on the cpu ?

[JimBobSquarePants]

@sebastienros depends on the CPU. Many (most) likely support Ssse3

https://en.m.wikipedia.org/wiki/SSSE3