aliasadidev/sixlaborscaptcha

Generate captcha with SixLabors' libraries on .NET Core

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sixlaborscaptcha's Issues

Method not found: 'SixLabors.Fonts.FontRectangle SixLabors.Fonts.TextMeasurer.Measure

Hello,
Recently upgraded to dotnet core 8.x and ClosedXML also upgraded to 0.102.0 which is using latest version of SixLabors.Fonts.

Got the following exception during captcha image generation.

System.MissingMethodException: Method not found: 'SixLabors.Fonts.FontRectangle SixLabors.Fonts.TextMeasurer.Measure(System.String, SixLabors.Fonts.TextOptions)'. at SixLaborsCaptcha.Core.SixLaborsCaptchaModule.Generate(String stringText)

Dotnet Info:
.NET SDK:
Version: 8.0.100
Commit: 57efcf1350
Workload version: 8.0.100-manifests.3b83835e

Runtime Environment:
OS Name: Mac OS X
OS Version: 14.3
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/8.0.100/

may be upgrading the the SixLabors.Fonts should fix the issue

Setting the DrawLinesColor as an option does not work

If you try to set the DrawLinesColor in options it is actually using the TextColor property.

Happens after multiple generate: 'minValue' cannot be greater than maxValue

I thought it was because of the Blazor scope problem at first, and I also had this problem after replacing MVC with Core.

linux fonts not working

SixLabors.Fonts.FontFamilyNotFoundException: 'The "Ariel" font family could not be found in the following directories:

• /usr/local/share/fonts/
• /usr/share/fonts/'

Install cabextract, a tool needed to unpack self-extracting .exe archives:

sudo apt install cabextract
Download the font package provided via this page (also note the EULA there):

wget https://www.freedesktop.org/software/fontconfig/webfonts/webfonts.tar.gz
Unpack, twice:

tar -xzf webfonts.tar.gz
cd msfonts/
cabextract *.exe
Move the fonts to your user's directory for installing additional fonts:

cp *.ttf *.TTF ~/.local/share/fonts/

cp *.ttf *.TTF /usr/local/share/fonts/

https://askubuntu.com/a/1092920

Background color in options

Can you add background color to SixLaborsCaptchaOptions?

Font family not found in RHEL7 with error SixLabors.Fonts.FontFamilyNotFoundException

I am trying to run my app on Kubernetes RHEL server. But every time i am getting SixLabors.Fonts.FontFamilyNotFoundException.
I have double checked and verified that the font is available inside /usr/share/fonts/. I have also tried adding a custom font as described in readme file but still no luck. Here is stackstace for same.

this is my code

 public async Task<string> GetCaptchaImage(string test)
        {
            _log.LogInformation(string.Format("GetCaptchaImage- Font name is {0}", Environment.GetEnvironmentVariable("font_name")));
            _log.LogInformation(string.Format("GetCaptchaImage- A bitmap of 130x80"));
            var slc = new SixLaborsCaptchaModule(new SixLaborsCaptchaOptions
            {
                DrawLines = 7,
                TextColor = new Color[] { Color.Blue, Color.Black },
                Width = 130,
                Height = 80,
                FontFamilies = new string[] { Environment.GetEnvironmentVariable("font_name") },
            });
            _log.LogInformation(string.Format("GetCaptchaImage- Generating random text"));
            var captchaText = Extentions.GetUniqueKey(6).ToUpper();
            _log.LogInformation(string.Format("GetCaptchaImage- Generating bitmap..."));
            var images = slc.Generate(captchaText);  // this is line 945
            _log.LogInformation(string.Format("GetCaptchaImage- Returning base64 image..."));
            return Convert.ToBase64String(images);
        }

DejaVuSans could not be found.  
SixLabors.Fonts.FontFamilyNotFoundException
"   at SixLabors.Fonts.FontCollection.GetImpl(String name CultureInfo culture)
   at SixLabors.Fonts.FontCollection.Get(String name)
   at SixLabors.Fonts.SystemFontCollection.Get(String name)
   at SixLabors.Fonts.SystemFonts.CreateFont(String name Single size FontStyle style)
   at SixLaborsCaptcha.Core.SixLaborsCaptchaModule.Generate(String stringText)
   at classname.GetCaptchaImage(String msisdn) 
   in Classname.cs:line 945
   at Clanname.GetCaptcha(String msisdn) in 
   classname.cs:line 609"

MissingMethodException

After a project upgrade from .net5 to .net6 and an upgrade to the latest SixLabors.ImageSharp version 2.1.0 (which is needed for my project) the library does not seem to work anymore. I get the following exception:

MissingMethodException: Method not found: 'System.Span1<SixLabors.ImageSharp.PixelFormats.Rgba32> SixLabors.ImageSharp.Memory.Buffer2D1.GetRowSpan(Int32)'.

Do you have any plans to upgrade your project anytime soon in order to work with the latest SixLabors.ImageSharp version?
Thank you very much!