Xamarin.Forms Essentials Camera Stream To Byte then Using SkiaSharp Image Size Down

Xamarin.Forms Essentials Camera Stream To BMP >> SkiaSharp Use FileFormat Jpg or Png then Reduce File Size Down

카메라 이미지(Raw) Stream(15~18Mb) ->SkiaSharp BMP 파일 변환 -> SkiaSharp Jpg Encoding image (254Kb~1Mb)

SkiaSharp 2.80.3 Bug: SKBitmap.Decode() ==  always null error

 //  SKData encodedData = Simage.Encode(SKEncodedImageFormat.Jpeg, 100);  

 

 

 

 

    async Task TakePhotoAsync()
        {
            try
            {

                if (!MediaPicker.IsCaptureSupported)
                {
                    return;
                }
    
                var file = await MediaPicker.CapturePhotoAsync(new MediaPickerOptions
                {
                    Title = DateTime.Now.ToString("yyyyMMddhhmmsss"),

                }).ConfigureAwait(true);

                await LoadPhotoAsync(file);

            }
            catch (Exception ex)
            {
                Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
            }
        }

  async Task LoadPhotoAsync(FileResult photo)
        {

            try
            {
                if (photo == null)
                {

                    return;
                }


                var newFile = Path.Combine(FileSystem.CacheDirectory, photo.FileName);
       
                byte[] imageByte = null;
                using (var stream = await photo.OpenReadAsync())
                {
                     using (var newStream = File.OpenWrite(newFile))//newFile))
                    {
                            await stream.CopyToAsync(newStream);
                     }

                    using (FileStream newStream2 = File.Open(newFile, FileMode.Open, FileAccess.ReadWrite))
                    {
                        try
                        {
                            using var imgStream = new SKManagedStream(newStream2);
                            using var skData = SKData.Create(newStream2);
                            using var codec = SKCodec.Create(skData);


                            SKImage _Skimage = SKImage.FromEncodedData(skData);
                    
                            using (SKData p = _Skimage.Encode(SKEncodedImageFormat.Jpeg, 25))
                            {
                               imageByte = p.ToArray();
                              }
                        }
                        catch (Exception Ex)
                        {
                            Console.WriteLine($"CapturePhotoAsync Err:" + Ex.Message);
                            return;
                        }
                    }

                }

      

               //  Photo File image view
               image2.Source = FileImageSource.FromFile(newFile);
                string Essential_file_name = DateTime.Now.ToString("yyyyMMddhhmmsss") + ".jpg";
                if (imageByte is null)
                {

                }
                else
                {

                   //  사진 저장.
                    Xamarin.Essentials.Preferences.Set(Essential_file_name, Convert.ToBase64String(imageByte));
                }


            }
            catch (Exception Ex)
            {
                Console.WriteLine("Load Image ERROR:" + Ex.Message);

            }



        }

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ASP.NET Example code for core to implement captcha with skiashrpdeveloppaper.com/asp-net-example-code-for-core-to-implement-captcha-with-skiashrp/

ASP.NET Example code for core to implement captcha with skiashrp - Develop Paper

preface This paper does not implement a completed captcha sample, but provides another idea of using the drawing API under the current. Net core 2.0, and shows it in the form of a simple demo. Skia Skia is an open source 2D graphics library, which provides

developpaper.com

](https://developpaper.com/asp-net-example-code-for-core-to-implement-captcha-with-skiashrp/)