I need to remove transparency from a PNG and replace with white background. the commented out lines are things I have tried. it just keeps coming out transparent.

Imports SkiaSharp
Imports SkiaSharp.QrCode.Image
Using output = New FileStream(Application.StartupPath & "geo.png", FileMode.OpenOrCreate)
Dim Code = New QrCode("test qr code", New Vector2Slim(256, 256), SKEncodedImageFormat.Png)
Code.GenerateImage(output)
End Using

Could not recognize data. change to 10 is enough.

appveyor is no longer mainted, let's move to github actions.
Also my CI is totally removing CircleCI.

Should add SkiaSharp.NativeAssets.Linux.

mono/SkiaSharp#834

The debug mode is normal

But Release Build Error

mono-aot-cross.exe 中发生了未经处理的 win32 异常。

XABBA7028: System.IO.FileNotFoundException: 未能找到文件“F:\Data\xxx\obj\Release\net7.0-android\android-arm\aot\SkiaSharp.dll.so”。

I am using this nuget package in my Xamarin Forms UWP project. When I run my project through the Microsoft App Certification Kit, I get the following error:

Supported APIs

• Error Found: The supported APIs test detected the following errors:

  - API __CxxFrameHandler4 in vcruntime140_1_app.dll is not supported for this application type. libSkiaSharp.dll calls this API.
  - API __CxxFrameHandler4 in vcruntime140_1_app.dll is not supported for this application type. libGLESv2.dll calls this API.
  

• Impact if not fixed: Using an API that is not part of the Windows SDK for Microsoft Store apps violates the Microsoft Store certification requirements.

• **How to fix:**Review the error messages to identify the API that is not part of the Windows SDK for Microsoft Store apps. Please note, apps that are built in a debug configuration or without .NET Native enabled (where applicable) can fail this test as these environments may pull in unsupported APIs. Retest your app in a release configuration, and with .NET Native enabled if applicable. See the link below for more information:
  Alternatives to Windows APIs in Microsoft Store apps.

Do you think it would be useful to add cake next?
(To build the nuget package and run tests in the future, maybe check the code, etc)

This is cake in case you dont know what it is:
https://cakebuild.net/

currently 1.68.0.

Can you submit a sample to read data from Qr code?

"The SkiaSharp version needs to be upgraded to a version >= 2.0.0 and less than 2.88.6 as there are critical vulnerabilities in versions within this range."

The referenced https://github.com/codebude/QRCoder has option to set a logo inside of the QR.
Is it supported with this lib?

If i build this for linux, i get the error:
The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.
Exception:

 ---> System.DllNotFoundException: Unable to load DLL 'libSkiaSharp' or one of its dependencies: The specified module could not be found. (0x8007007E)
   at SkiaSharp.SkiaApi.sk_colortype_get_default_8888()
   at SkiaSharp.SKImageInfo..cctor()
   --- End of inner exception stack trace ---
   at SkiaSharp.SKImageInfo..ctor(Int32 width, Int32 height)
   at AT.QRCoder.DiscordBot.Commands.QrCoder.GenerateQr(String content, String darkColor, String lightColor, String iconUrl) in C:\Users\Name\Desktop\ProjName\src\Proj.ProjName\Commands\File.cs:line 30```

at this line:
 ` var info = new SKImageInfo(660, 660);`

Do you know what causes that and how to fix that? 

Hello，Is there any parameter control to make a JPG format two-dimensional code with black text on a white background

Hello,

How could we change the Square dots with Circular ones ?

Presudo code.

var content = "foobar";
var qrCode = new QrCode(content, new Vector2Slim(256, 256), SKEncodedImageFormat.Png);
byte[] bytes = qrCode.GetImage(ECCLevel.L); // <- new. return byte[]

// treat byte as you like. .AsSpan() or any.

How change?

Current API is following.

using var stream = new MemoryStream();
var qr = new QrCode("WIFI:T:WPA;S:mynetwork;P:mypass;;", new Vector2Slim(512, 512), SKEncodedImageFormat.Png);
qr.GenerateImage(stream);
Bitmap.FromStream(stream).Dump(); // Show Bitmap on LinqPad

This become...

var qrCode = new QrCode("WIFI:T:WPA;S:mynetwork;P:mypass;;", new Vector2Slim(256, 256), SKEncodedImageFormat.Png);
Bitmap.FromStream(new MemoryStream(qrCode.GetImage(ECCLevel.L))).Dump();

Are others experiencing this issue?

ASP.NET-based applications typically require assemblies to be signed or it fails to load them with the message "Could not load file or assembly. A strongly-named assembly is required". The solution is rather simple as documented here: https://medium.com/@ShaoWenbinSaleh/fix-error-a-strongly-named-assembly-is-required-in-visual-studio-9cad3e7327dd.

I dont know if this is an issue but im gonna report it anyway.

Your nuget api key is exposed in the appveyor.yml file.

Hi
I want to generate QRcode in blazor wasm in canvas but when I use this code

<h3>QrSkia</h3>
<SKCanvasView OnPaintSurface="OnPaintSurfaceQr" />
@code {
 void OnPaintSurfaceQr(SKPaintSurfaceEventArgs e)
    {

        var canvas = e.Surface.Canvas;
        canvas.Clear(SKColors.Red);
        var content = "https://github.com/guitarrapc/SkiaSharp.QrCod";
        using (var generator = new QRCodeGenerator())
        {
            // Generate QrCode
            var qr = generator.CreateQrCode(content, ECCLevel.L);

            // Render to canvas
            var info = new SKImageInfo(512, 512);
            using (var surface = SKSurface.Create(info))
            {
                //var canvas = surface.Canvas;
                canvas.Render(qr, info.Width, info.Height);
}
}
}
}

it just renders under 160X600 corect and fulfill canvas.
if i use var info = new SKImageInfo(160, 160);

it renders QRcode completely.

Hey, is it possible to change the color of the qr code? (Not the color of the background)

There are no color and icon samples.

Linux:

Windows:

code:
var icon = new IconData
{
Icon = SKBitmap.Decode(byteIcon),
IconSizePercent = 10,
};

        using var generator = new QRCodeGenerator();
        var qr = generator.CreateQrCode(url, ECCLevel.L);
        var info = new SKImageInfo(512, 512);
        using var surface = SKSurface.Create(info);
        var canvas = surface.Canvas;
        canvas.Render(qr, info.Width, info.Height, SKColor.Parse("ffffff"), SKColor.Parse("000000"), icon);
        using var image = surface.Snapshot();
        using var data = image.Encode(SKEncodedImageFormat.Png, 100);

I want to make the red mark smaller, how to set it?

While also including SkiaSharp.NativeAssets.NanoServer 1.68.1.1 into my .NET Core 3.1 project, and building and running on mcr.microsoft.com/dotnet/core/sdk:3.1-nanoserver-1803, I now get:

The type initializer for 'SkiaSharp.SKImageInfo' threw an exception.
Unable to load DLL 'libSkiaSharp' or one of its dependencies: The specified module could not be found. (0x8007007E)

However this all did work with the same versions of the libraries when building with .NET Core 2.2 on mcr.microsoft.com/dotnet/core/sdk:2.2-nanoserver-1803.

Any ideas? Is this a SkiaSharp.NativeAssets.NanoServer issue?

When I create a PNG-Output, I'll get a PNG with alpha = 0 (transparent). Is there a way to set alpha = 1 (fully opaque)?

Also: If just use the option JPEG Output, I get a fully black Image. Is this an actual Issue or supposed to be that way?

Thanks in Advance.

I would like you to add an extension to write information to the qr code.
Here is an example of what it would look like

public static void Render(this SKCanvas canvas, QRCodeData data, int width, int hight, SKColor clearColor, SKColor codeColor, IconData iconData, string iconInfo)
        {
            var hightInconInfo = 25;
            canvas.Clear(clearColor);
            using QRCodeRenderer qRCodeRenderer = new QRCodeRenderer();
            SKRect area = SKRect.Create(0f, 0f, width, hight + hightInconInfo);
            qRCodeRenderer.Render(canvas, area, data, codeColor, null, iconData);

            var fontInitNumber = 35;

            // draw some text
            var paint = new SKPaint
            {
                Color = SKColors.Black,
                IsAntialias = true,
                Style = SKPaintStyle.Fill,
                TextAlign = SKTextAlign.Center,
                TextSize = fontInitNumber
            };

            float widthicon = width / 100f * (float)iconData.IconSizePercent;
            float heigthicon = hight / 100f * (float)iconData.IconSizePercent;
            float xicon = width / 2f - widthicon / 2f;
            float yicon = hight / 2f - heigthicon / 2f;

            var dimText = paint.MeasureText(iconInfo);

            while (dimText > widthicon)
            {
                paint.TextSize = fontInitNumber--;
                dimText = paint.MeasureText(iconInfo);
            }

            var coord = new SKPoint(xicon + (dimText / 2f) + ((widthicon - dimText) / 2f), yicon + heigthicon + 10f);
            canvas.DrawText(iconInfo, coord, paint);
        }
![descargar](https://user-images.githubusercontent.com/45176268/177049680-d0997d0e-9594-48ea-9c9c-654a0877217c.png)