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Update create-custom-image-properties-resolver-net-standard.md
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‎knowledge-base/create-custom-image-properties-resolver-net-standard.md‎

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@@ -23,6 +23,11 @@ res_type: kb
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<td>RadPdfProcessing</td>
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<td><a href="https://www.telerik.com/blogs/author/yoan-karamanov">Yoan Karamanov</a></td>
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</tr>
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<tr>
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<td>2.0.0*</td>
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<td>SixLabors.ImageSharp</td>
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<td>-</td>
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</tr>
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</tbody>
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</table>
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@@ -34,150 +39,149 @@ res_type: kb
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## Solution
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The following code snippets demonstrates how to create a custom implementation of the ImagePropertiesResolver abstract class using the [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) library and set it to the ImagePropertiesResolver property of the FixedExtensibilityManager.
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The following code snippets demonstrate how to create a custom implementation of the ImagePropertiesResolver abstract class using the [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) library and set it to the ImagePropertiesResolver property of the FixedExtensibilityManager.
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#### __[C#] Create a custom implementation inheriting the ImagePropertiesResolverBase abstract class__
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{{region kb-create-custom-image-properties-resolver1}}
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43-
public class ImagePropertiesResolver : ImagePropertiesResolverBase
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public class ImagePropertiesResolver : ImagePropertiesResolverBase
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{
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public override Telerik.Documents.Primitives.Size GetImageSize(byte[] imageData)
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{
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public override Telerik.Documents.Primitives.Size GetImageSize(byte[] imageData)
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var size = Telerik.Documents.Primitives.Size.Empty;
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try
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{
47-
var size = Telerik.Documents.Primitives.Size.Empty;
48-
try
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using (SixLabors.ImageSharp.Image image = SixLabors.ImageSharp.Image.Load(imageData))
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{
50-
using (ImageSharp image = ImageSharp.Load(imageData))
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{
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size = new Telerik.Documents.Primitives.Size(image.Width, image.Height);
53-
}
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size = new Telerik.Documents.Primitives.Size(image.Width, image.Height);
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}
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catch (UnknownImageFormatException ex)
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{
57-
// Image format not recognized.
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throw new NotSupportedException("Unsupported image format.", ex);
59-
}
60-
61-
return size;
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}
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64-
public override bool TryGetRawImageData(byte[] imageData, out byte[] rawRgbData, out byte[] rawAlpha, out Telerik.Documents.Primitives.Size size)
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catch (SixLabors.ImageSharp.UnknownImageFormatException ex)
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{
66-
try
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{
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IImageFormat imageFormat;
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using (ImageSharp image = ImageSharp.Load(imageData, out imageFormat))
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{
71-
size = new Telerik.Documents.Primitives.Size(image.Width, image.Height);
72-
73-
IImageDecoder decoder = null;
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Dictionary<Type, Action> decoderSwitch = new Dictionary<Type, Action>
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{
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{ typeof(PngFormat), () => decoder = new PngDecoder() },
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{ typeof(BmpFormat), () => decoder = new BmpDecoder() },
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{ typeof(GifFormat), () => decoder = new GifDecoder() },
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{ typeof(JpegFormat), () => decoder = new JpegDecoder() },
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{ typeof(PbmFormat), () => decoder = new PbmDecoder() },
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{ typeof(TgaFormat), () => decoder = new TgaDecoder() },
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{ typeof(TiffFormat), () => decoder = new TiffDecoder() },
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{ typeof(WebpFormat), () => decoder = new WebpDecoder() },
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};
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if (decoderSwitch.ContainsKey(imageFormat.GetType()))
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{
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decoderSwitch[imageFormat.GetType()]();
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}
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else
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{
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rawRgbData = null;
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rawAlpha = null;
94-
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return false;
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}
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// Image format not recognized.
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throw new NotSupportedException("Unsupported image format.", ex);
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}
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98-
Configuration configuration = new Configuration();
99-
ImageSharp decodedImage = decoder.Decode(configuration, new MemoryStream(imageData));
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return size;
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}
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101-
ImageFrame frame = decodedImage.Frames[0];
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public override bool TryGetRawImageData(byte[] imageData, out byte[] rawRgbData, out byte[] rawAlpha, out Telerik.Documents.Primitives.Size size)
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{
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try
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{
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IImageFormat imageFormat;
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using (SixLabors.ImageSharp.Image image = SixLabors.ImageSharp.Image.Load(imageData, out imageFormat))
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{
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size = new Telerik.Documents.Primitives.Size(image.Width, image.Height);
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103-
ImageFrame<Rgb24> frameRgb24 = frame as ImageFrame<Rgb24>;
104-
if (frameRgb24 != null)
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IImageDecoder decoder = null;
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Dictionary<Type, Action> decoderSwitch = new Dictionary<Type, Action>
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{
106-
GetRawDataFromRgbSource(frameRgb24, out rawRgbData);
107-
rawAlpha = null;
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{ typeof(PngFormat), () => decoder = new PngDecoder() },
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{ typeof(BmpFormat), () => decoder = new BmpDecoder() },
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{ typeof(GifFormat), () => decoder = new GifDecoder() },
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{ typeof(JpegFormat), () => decoder = new JpegDecoder() },
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{ typeof(PbmFormat), () => decoder = new PbmDecoder() },
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{ typeof(TgaFormat), () => decoder = new TgaDecoder() },
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{ typeof(TiffFormat), () => decoder = new TiffDecoder() },
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{ typeof(WebpFormat), () => decoder = new WebpDecoder() },
89+
};
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91+
if (decoderSwitch.ContainsKey(imageFormat.GetType()))
92+
{
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decoderSwitch[imageFormat.GetType()]();
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}
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else
96+
{
97+
rawRgbData = null;
98+
rawAlpha = null;
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109-
return true;
110-
}
100+
return false;
101+
}
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112-
ImageFrame<Rgba32> frameRgba32 = frame as ImageFrame<Rgba32>;
113-
if (frameRgba32 != null)
114-
{
115-
GetRawDataFromRgbaSource(frameRgba32, out rawRgbData, out rawAlpha);
103+
SixLabors.ImageSharp.Configuration configuration = new SixLabors.ImageSharp.Configuration();
104+
SixLabors.ImageSharp.Image decodedImage = decoder.Decode(configuration, new MemoryStream(imageData));
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117-
return true;
118-
}
106+
SixLabors.ImageSharp.ImageFrame frame = decodedImage.Frames[0];
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120-
throw new NotSupportedException("Not supported image pixel format.");
121-
}
122-
}
123-
catch (Exception ex)
124-
{
125-
if (ex is UnknownImageFormatException || ex is ImageProcessingException)
108+
SixLabors.ImageSharp.ImageFrame<Rgb24> frameRgb24 = frame as SixLabors.ImageSharp.ImageFrame<Rgb24>;
109+
if (frameRgb24 != null)
126110
{
127-
rawRgbData = null;
111+
GetRawDataFromRgbSource(frameRgb24, out rawRgbData);
128112
rawAlpha = null;
129-
size = new Telerik.Documents.Primitives.Size();
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131-
return false;
114+
return true;
132115
}
133-
else
116+
117+
SixLabors.ImageSharp.ImageFrame<Rgba32> frameRgba32 = frame as SixLabors.ImageSharp.ImageFrame<Rgba32>;
118+
if (frameRgba32 != null)
134119
{
135-
throw ex;
120+
GetRawDataFromRgbaSource(frameRgba32, out rawRgbData, out rawAlpha);
121+
122+
return true;
136123
}
124+
125+
throw new NotSupportedException("Not supported image pixel format.");
137126
}
138127
}
139-
140-
private static void GetRawDataFromRgbSource(ImageFrame<Rgb24> source, out byte[] data)
128+
catch (Exception ex)
141129
{
142-
byte[] pixels = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 3];
143-
Span<byte> span = new Span<byte>(pixels);
144-
source.CopyPixelDataTo(span);
145-
data = span.ToArray();
130+
if (ex is SixLabors.ImageSharp.UnknownImageFormatException || ex is SixLabors.ImageSharp.ImageProcessingException)
131+
{
132+
rawRgbData = null;
133+
rawAlpha = null;
134+
size = new Telerik.Documents.Primitives.Size();
135+
136+
return false;
137+
}
138+
else
139+
{
140+
throw ex;
141+
}
146142
}
143+
}
147144

148-
private static void GetRawDataFromRgbaSource(ImageFrame<Rgba32> source, out byte[] data, out byte[] alpha)
149-
{
150-
byte[] pixels = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 4];
151-
Span<byte> span = new Span<byte>(pixels);
152-
source.CopyPixelDataTo(span);
145+
private static void GetRawDataFromRgbSource(SixLabors.ImageSharp.ImageFrame<Rgb24> source, out byte[] data)
146+
{
147+
byte[] pixels = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 3];
148+
Span<byte> span = new Span<byte>(pixels);
149+
source.CopyPixelDataTo(span);
150+
data = span.ToArray();
151+
}
153152

154-
data = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 3];
155-
alpha = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height];
156-
bool shouldExportAlpha = false;
153+
private static void GetRawDataFromRgbaSource(SixLabors.ImageSharp.ImageFrame<Rgba32> source, out byte[] data, out byte[] alpha)
154+
{
155+
byte[] pixels = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 4];
156+
Span<byte> span = new Span<byte>(pixels);
157+
source.CopyPixelDataTo(span);
157158

158-
for (int i = 0; i < pixels.Length; i += 4)
159-
{
160-
byte r = pixels[i];
161-
byte g = pixels[i + 1];
162-
byte b = pixels[i + 2];
163-
byte a = pixels[i + 3];
159+
data = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height * 3];
160+
alpha = new byte[source.PixelBuffer.Width * source.PixelBuffer.Height];
161+
bool shouldExportAlpha = false;
164162

165-
data[3 * i / 4] = r;
166-
data[3 * i / 4 + 1] = g;
167-
data[3 * i / 4 + 2] = b;
168-
alpha[i / 4] = a;
163+
for (int i = 0; i < pixels.Length; i += 4)
164+
{
165+
byte r = pixels[i];
166+
byte g = pixels[i + 1];
167+
byte b = pixels[i + 2];
168+
byte a = pixels[i + 3];
169169

170-
if (a != 255)
171-
{
172-
shouldExportAlpha = true;
173-
}
174-
}
170+
data[3 * i / 4] = r;
171+
data[3 * i / 4 + 1] = g;
172+
data[3 * i / 4 + 2] = b;
173+
alpha[i / 4] = a;
175174

176-
if (!shouldExportAlpha)
175+
if (a != 255)
177176
{
178-
alpha = null;
177+
shouldExportAlpha = true;
179178
}
180179
}
180+
181+
if (!shouldExportAlpha)
182+
{
183+
alpha = null;
184+
}
181185
}
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183187
{{endregion}}

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