├── .gitattributes
├── .gitignore
├── LICENSE
├── README.md
├── Slideshow.ico
├── ThumbnailSharp.sln
└── ThumbnailSharp
├── Properties
└── AssemblyInfo.cs
├── ThumbnailCreator.cs
└── ThumbnailSharp.csproj
/.gitattributes:
--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | MIT License
2 |
3 | Copyright (c) 2017 Mirza Ghulam Rasyid
4 |
5 | Permission is hereby granted, free of charge, to any person obtaining a copy
6 | of this software and associated documentation files (the "Software"), to deal
7 | in the Software without restriction, including without limitation the rights
8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 |
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # ThumbnailSharp
2 | A specialized library to create an image thumbnail from various sources with better result and supports different image formats. A Thumbnail is something that's not very important sometimes, but for softwares/web apps that require a thumbnail to be uploaded to their databases to be used later becomes so vital. And if we just need to create a simple thumbnail, why do we need a big image composition library that holds unnecessary methods for us? Here, we introduce a simple but powerful library for creating a nice thumbnail either from local or internet (supports async/await) that produces better result than **Image.GetThumbnailImage Method** from **System.Drawing.dll**. You can consume the result of operation either as an array of bytes or a stream.
3 |
4 | Here are some samples:
5 |
6 | **Original Image (Landscape)**
7 |
8 | 
9 |
10 | **Thumbnail (Jpeg)**
11 |
12 | *size is set to 250*
13 |
14 | 
15 |
16 |
17 | *size is set to 450*
18 |
19 | 
20 |
21 |
22 |
23 |
24 |
25 | **Original Image (Portrait)**
26 |
27 | 
28 |
29 | **Thumbnail (Jpeg)**
30 |
31 | *size is set to 250*
32 |
33 | 
34 |
35 | *size is set to 450*
36 |
37 | 
38 |
39 |
40 |
41 |
42 |
43 | **Original Image (Square/Proportional)**
44 |
45 | 
46 |
47 | **Thumbnail (Jpeg)**
48 |
49 | *size is set to 250*
50 |
51 | 
52 |
53 |
54 |
55 |
56 |
57 |
58 | How does it work?
59 | Simple, you just need to pass thumbnail size (aspect ratio will be reserved), image source, and image format.
60 |
61 | **Get thumbnail from internet source**
62 |
63 | ```csharp
64 | byte[] resultBytes = await new ThumbnailCreator().CreateThumbnailBytesAsync(
65 | thumbnailSize: 250,
66 | urlAddress: new Uri("http://www.sample-image.com/image.jpg",UriKind.Absolute),
67 | imageFormat: Format.Jpeg
68 | );
69 | // or
70 | Stream resultStream = await new ThumbnailCreator().CreateThumbnailStreamAsync(
71 | thumbnailSize: 250,
72 | urlAddress: new Uri("http://www.sample-image.com/image.png",UriKind.Absolute),
73 | imageFormat: Format.Png
74 | );
75 | ```
76 |
77 | **Get thumbnail from local source**
78 |
79 | ```csharp
80 | byte[] resultBytes = new ThumbnailCreator().CreateThumbnailBytes(
81 | thumbnailSize: 300,
82 | imageFileLocation: @"C:\images\image.bmp",
83 | imageFormat: Format.Bmp
84 | );
85 | //or
86 | Stream resultStream = new ThumbnailCreator().CreateThumbnailStream(
87 | thumbnailSize: 300,
88 | imageFileLocation: @"C:\images\image.bmp",
89 | imageFormat: Format.Bmp
90 | );
91 | ```
92 |
93 | **Get thumbnail from image stream**
94 |
95 | ```csharp
96 | byte[] resultBytes = new ThumbnailCreator().CreateThumbnailBytes(
97 | thumbnailSize: 300,
98 | imageStream: new FileStream(@"C:\images\image.jpg",FileMode.Open,FileAccess.ReadWrite),
99 | imageFormat: Format.Jpeg
100 | );
101 | //or
102 | Stream resultStream = new ThumbnailCreator().CreateThumbnailStream(
103 | thumbnailSize: 300,
104 | imageStream: new FileStream(@"C:\images\image.jpg",FileMode.Open,FileAccess.ReadWrite),
105 | imageFormat: Format.Jpeg
106 | );
107 | ```
108 |
109 | **Get thumbnail from image bytes**
110 |
111 | ```csharp
112 | byte[] buffer = GetImageBytes(); //this is just fictitious method to get image data in bytes
113 |
114 | byte[] resultBytes = new ThumbnailCreator().CreateThumbnailBytes(
115 | thumbnailSize: 300,
116 | imageBytes: buffer,
117 | imageFormat: Format.Gif
118 | );
119 | //or
120 | Stream resultStream = new ThumbnailCreator().CreateThumbnailStream(
121 | thumbnailSize: 300,
122 | imageBytes: buffer,
123 | imageFormat: Format.Tiff
124 | );
125 | ```
126 |
127 |
128 |
129 | **Take a look our softwares that were built using this library:**
130 |
131 | ### [ThumbnailSharp.Clients](https://github.com/mirzaevolution/ThumbnailSharp.Client)
132 |
133 |
134 | ---
135 |
136 | Ready to taste it?
137 |
138 | #### Install from [Nuget.Org](https://www.nuget.org/packages/ThumbnailSharp/1.0.0)
139 |
140 | ```
141 | Install-Package ThumbnailSharp -Version 1.0.0
142 | ```
143 |
144 | ---
145 |
146 |
147 |
148 | Created by: **[Mirza Ghulam Rasyid](https://twitter.com/mirzaevolution)**
149 |
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/Slideshow.ico:
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https://raw.githubusercontent.com/mirzaevolution/ThumbnailSharp/66cf7a4d50d6109829700f682364ea5cfc487df3/Slideshow.ico
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/ThumbnailSharp.sln:
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1 |
2 | Microsoft Visual Studio Solution File, Format Version 12.00
3 | # Visual Studio 15
4 | VisualStudioVersion = 15.0.26730.16
5 | MinimumVisualStudioVersion = 10.0.40219.1
6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ThumbnailSharp", "ThumbnailSharp\ThumbnailSharp.csproj", "{0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}"
7 | EndProject
8 | Global
9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution
10 | Debug|Any CPU = Debug|Any CPU
11 | Release|Any CPU = Release|Any CPU
12 | EndGlobalSection
13 | GlobalSection(ProjectConfigurationPlatforms) = postSolution
14 | {0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
15 | {0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}.Debug|Any CPU.Build.0 = Debug|Any CPU
16 | {0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}.Release|Any CPU.ActiveCfg = Release|Any CPU
17 | {0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}.Release|Any CPU.Build.0 = Release|Any CPU
18 | EndGlobalSection
19 | GlobalSection(SolutionProperties) = preSolution
20 | HideSolutionNode = FALSE
21 | EndGlobalSection
22 | GlobalSection(ExtensibilityGlobals) = postSolution
23 | SolutionGuid = {3FA8D01B-D065-4A3C-A311-D634F2C08FB1}
24 | EndGlobalSection
25 | EndGlobal
26 |
--------------------------------------------------------------------------------
/ThumbnailSharp/Properties/AssemblyInfo.cs:
--------------------------------------------------------------------------------
1 | using System.Reflection;
2 | using System.Runtime.CompilerServices;
3 | using System.Runtime.InteropServices;
4 |
5 | // General Information about an assembly is controlled through the following
6 | // set of attributes. Change these attribute values to modify the information
7 | // associated with an assembly.
8 | [assembly: AssemblyTitle("ThumbnailSharp")]
9 | [assembly: AssemblyDescription("A simple library to create a flexibel thumbnail from an image.")]
10 | [assembly: AssemblyConfiguration("")]
11 | [assembly: AssemblyCompany("Mirza Ghulam Rasyid")]
12 | [assembly: AssemblyProduct("ThumbnailSharp")]
13 | [assembly: AssemblyCopyright("Copyright © 2017 Mirza Ghulam Rasyid")]
14 | [assembly: AssemblyTrademark("")]
15 | [assembly: AssemblyCulture("")]
16 |
17 | // Setting ComVisible to false makes the types in this assembly not visible
18 | // to COM components. If you need to access a type in this assembly from
19 | // COM, set the ComVisible attribute to true on that type.
20 | [assembly: ComVisible(false)]
21 |
22 | // The following GUID is for the ID of the typelib if this project is exposed to COM
23 | [assembly: Guid("0f6e03aa-e5d9-4e2c-be26-a7c396705bdf")]
24 |
25 | // Version information for an assembly consists of the following four values:
26 | //
27 | // Major Version
28 | // Minor Version
29 | // Build Number
30 | // Revision
31 | //
32 | // You can specify all the values or you can default the Build and Revision Numbers
33 | // by using the '*' as shown below:
34 | // [assembly: AssemblyVersion("1.0.*")]
35 | [assembly: AssemblyVersion("1.0.0.0")]
36 | [assembly: AssemblyFileVersion("1.0.0.0")]
37 |
--------------------------------------------------------------------------------
/ThumbnailSharp/ThumbnailCreator.cs:
--------------------------------------------------------------------------------
1 | /*MIT License
2 |
3 | Copyright(c) 2017 Mirza Ghulam Rasyid
4 |
5 | Permission is hereby granted, free of charge, to any person obtaining a copy
6 | of this software and associated documentation files (the "Software"), to deal
7 | in the Software without restriction, including without limitation the rights
8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 |
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 |
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | */
23 |
24 | using System;
25 | using System.Drawing;
26 | using System.Drawing.Drawing2D;
27 | using System.Drawing.Imaging;
28 | using System.IO;
29 | using System.Net.Http;
30 | using System.Threading.Tasks;
31 |
32 |
33 | namespace ThumbnailSharp
34 | {
35 | ///
36 | /// Image format to use when creating a thumbnail.
37 | ///
38 | public enum Format
39 | {
40 | Jpeg,
41 | Bmp,
42 | Png,
43 | Gif,
44 | Tiff
45 |
46 | }
47 | ///
48 | /// make thumbnail force by ratio
49 | ///
50 | public enum Ratio
51 | {
52 |
53 | Landscape,
54 | Portrait
55 | }
56 | ///
57 | /// Thumbnail class that holds various methods to create an image thumbnail.
58 | ///
59 | public class ThumbnailCreator
60 | {
61 | Ratio? forceRatio = null;
62 | public ThumbnailCreator() : this(null)
63 | {
64 | }
65 | public ThumbnailCreator(Ratio? forceRatio)
66 | {
67 |
68 | this.forceRatio = forceRatio;
69 | }
70 |
71 | private Stream GetStreamFromFileLocation(string imageLocation)
72 | {
73 | if (!File.Exists(imageLocation))
74 | {
75 | throw new FileNotFoundException("fileNotFound:" + imageLocation);
76 | }
77 | return File.OpenRead(imageLocation);
78 | }
79 | Ratio GetRatio(Ratio? forceRatio, float actualWidth, float actualHeight)
80 | {
81 | if (forceRatio.HasValue)
82 | {
83 | return forceRatio.Value;
84 | }
85 | return actualWidth >= actualHeight ? Ratio.Landscape : Ratio.Portrait;
86 |
87 | }
88 | private Bitmap CreateBitmapThumbnail(uint thumbnailSize, string imageFileLocation)
89 | {
90 | return CreateBitmapThumbnail(thumbnailSize, GetStreamFromFileLocation(imageFileLocation));
91 | Bitmap bitmap = null;
92 | Image image = null;
93 | float actualHeight = default(float);
94 | float actualWidth = default(float);
95 | uint thumbnailHeight = default(uint);
96 | uint thumbnailWidth = default(uint);
97 | try
98 | {
99 | image = Image.FromFile(imageFileLocation);
100 | }
101 | catch
102 | {
103 | if (image != null)
104 | image = null;
105 | }
106 | if (image != null)
107 | {
108 | actualHeight = image.Height;
109 | actualWidth = image.Width;
110 | if (forceRatio.Value == Ratio.Portrait || actualHeight > actualWidth)
111 | {
112 | if ((uint)actualHeight <= thumbnailSize)
113 | return (Bitmap)image;
114 | //throw new Exception("Thumbnail size must be less than actual height (portrait image)");
115 | thumbnailHeight = thumbnailSize;
116 | thumbnailWidth = (uint)((actualWidth / actualHeight) * thumbnailSize);
117 | }
118 | else if (forceRatio.Value == Ratio.Landscape && actualWidth > actualHeight)
119 | {
120 |
121 | if ((uint)actualWidth <= thumbnailSize)
122 | return (Bitmap)image;
123 | //throw new Exception("Thumbnail size must be less than actual width (landscape image)");
124 | thumbnailWidth = thumbnailSize;
125 | thumbnailHeight = (uint)((actualHeight / actualWidth) * thumbnailSize);
126 | }
127 | else
128 | {
129 | if ((uint)actualWidth <= thumbnailSize)
130 | return (Bitmap)image;
131 | //throw new Exception("Thumbnail size must be less than image's size");
132 | thumbnailWidth = thumbnailSize;
133 | thumbnailHeight = thumbnailSize;
134 | }
135 | try
136 | {
137 |
138 | bitmap = new Bitmap((int)thumbnailWidth, (int)thumbnailHeight);
139 | Graphics resizedImage = Graphics.FromImage(bitmap);
140 | resizedImage.InterpolationMode = InterpolationMode.HighQualityBicubic;
141 | resizedImage.CompositingQuality = CompositingQuality.HighQuality;
142 | resizedImage.SmoothingMode = SmoothingMode.HighQuality;
143 | resizedImage.DrawImage(image, 0, 0, thumbnailWidth, thumbnailHeight);
144 | }
145 | catch
146 | {
147 | if (bitmap != null)
148 | bitmap = null;
149 | }
150 | }
151 | return bitmap;
152 | }
153 | private Bitmap CreateBitmapThumbnail(uint thumbnailSize, Stream imageStream)
154 | {
155 | Bitmap bitmap = null;
156 | System.Drawing.Image image = null;
157 | float actualHeight = default(float);
158 | float actualWidth = default(float);
159 | uint thumbnailHeight = default(uint);
160 | uint thumbnailWidth = default(uint);
161 | try
162 | {
163 | image = Image.FromStream(imageStream);
164 | }
165 | catch
166 | {
167 | if (image != null)
168 | image = null;
169 | }
170 | if (image != null)
171 | {
172 | actualHeight = image.Height;
173 | actualWidth = image.Width;
174 | if (GetRatio(forceRatio,actualWidth, actualHeight)== Ratio.Portrait)
175 | {
176 | if ((uint)actualHeight <= thumbnailSize)
177 | return (Bitmap)image;
178 | //throw new Exception("Thumbnail size must be less than actual height (portrait image)");
179 | thumbnailHeight = thumbnailSize;
180 | thumbnailWidth = (uint)((actualWidth / actualHeight) * thumbnailSize);
181 | }
182 | else if (GetRatio(forceRatio, actualWidth, actualHeight) == Ratio.Landscape)
183 | {
184 |
185 | if ((uint)actualWidth <= thumbnailSize)
186 | return (Bitmap)image;
187 | //throw new Exception("Thumbnail size must be less than actual width (landscape image)");
188 | thumbnailWidth = thumbnailSize;
189 | thumbnailHeight = (uint)((actualHeight / actualWidth) * thumbnailSize);
190 | }
191 | else
192 | {
193 | if ((uint)actualWidth <= thumbnailSize)
194 | return (Bitmap)image;
195 | //throw new Exception("Thumbnail size must be less than image's size");
196 | thumbnailWidth = thumbnailSize;
197 | thumbnailHeight = thumbnailSize;
198 | }
199 | try
200 | {
201 | bitmap = new Bitmap((int)thumbnailWidth, (int)thumbnailHeight);
202 | Graphics resizedImage = Graphics.FromImage(bitmap);
203 | resizedImage.InterpolationMode = InterpolationMode.HighQualityBicubic;
204 | resizedImage.CompositingQuality = CompositingQuality.HighQuality;
205 | resizedImage.SmoothingMode = SmoothingMode.HighQuality;
206 | resizedImage.DrawImage(image, 0, 0, thumbnailWidth, thumbnailHeight);
207 | }
208 | catch
209 | {
210 | if (bitmap != null)
211 | bitmap = null;
212 | }
213 | }
214 | return bitmap;
215 | }
216 | private ImageFormat GetImageFormat(Format format)
217 | {
218 | switch (format)
219 | {
220 | case Format.Jpeg:
221 | return ImageFormat.Jpeg;
222 | case Format.Bmp:
223 | return ImageFormat.Bmp;
224 | case Format.Png:
225 | return ImageFormat.Png;
226 | case Format.Gif:
227 | return ImageFormat.Gif;
228 | default:
229 | return ImageFormat.Tiff;
230 | }
231 | }
232 | private async Task GetImageStreamFromUrl(Uri urlAddress)
233 | {
234 | Stream result = null;
235 | try
236 | {
237 | byte[] bytes = await GetImageBytesFromUrl(urlAddress);
238 | result = new MemoryStream(bytes);
239 | }
240 | catch
241 | {
242 | result = null;
243 | }
244 | return result;
245 | }
246 | private async Task GetImageBytesFromUrl(Uri urlAddress)
247 | {
248 | byte[] buffer = null;
249 | try
250 | {
251 | using (HttpClient client = new HttpClient())
252 | {
253 | buffer = await client.GetByteArrayAsync(urlAddress);
254 | }
255 | }
256 | catch
257 | {
258 | buffer = null;
259 | }
260 | return buffer;
261 | }
262 |
263 | ///
264 | /// Create a thumbnail from file and returns as stream.
265 | ///
266 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
267 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
268 | /// Correct image file location.
269 | /// Image format to use.
270 | /// A thumbnail image as stream. Returns null if it fails.
271 | /// 'imageFileLocation' is null.
272 | /// 'imageFileLocation' does not exist.
273 | public Stream CreateThumbnailStream(uint thumbnailSize, string imageFileLocation, Format imageFormat)
274 | {
275 | if (String.IsNullOrEmpty(imageFileLocation))
276 | throw new ArgumentNullException(nameof(imageFileLocation), "'imageFileLocation' cannot be null");
277 | if (!File.Exists(imageFileLocation))
278 | throw new FileNotFoundException($"'{imageFileLocation}' cannot be found");
279 | Bitmap bitmap = CreateBitmapThumbnail(thumbnailSize, imageFileLocation);
280 | if (bitmap != null)
281 | {
282 | MemoryStream stream = new MemoryStream();
283 | bitmap.Save(stream, GetImageFormat(imageFormat));
284 | stream.Position = 0;
285 | return stream;
286 | }
287 | return null;
288 | }
289 | ///
290 | /// Create a thumbnail from image stream and returns as stream.
291 | ///
292 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
293 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
294 | /// Valid image stream object.
295 | /// Image format to use.
296 | /// A thumbnail image as stream. Returns null if it fails.
297 | /// 'imageStream' is null.
298 | public Stream CreateThumbnailStream(uint thumbnailSize, Stream imageStream, Format imageFormat)
299 | {
300 | if (imageStream == null)
301 | throw new ArgumentNullException(nameof(imageStream), "'imageStream' cannot be null");
302 | Bitmap bitmap = CreateBitmapThumbnail(thumbnailSize, imageStream);
303 | if (bitmap != null)
304 | {
305 | MemoryStream stream = new MemoryStream();
306 | bitmap.Save(stream, GetImageFormat(imageFormat));
307 | stream.Position = 0;
308 | return stream;
309 | }
310 | return null;
311 | }
312 | ///
313 | /// Create a thumbnail from image in bytes and returns as stream.
314 | ///
315 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
316 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
317 | /// Valid image bytes array.
318 | /// Image format to use.
319 | /// A thumbnail image as stream. Returns null if it fails.
320 | /// 'imageBytes' is null.
321 | public Stream CreateThumbnailStream(uint thumbnailSize, byte[] imageBytes, Format imageFormat)
322 | {
323 | if (imageBytes == null)
324 | throw new ArgumentNullException(nameof(imageBytes), "'imageStream' cannot be null");
325 | Bitmap bitmap = CreateBitmapThumbnail(thumbnailSize, new MemoryStream(imageBytes));
326 | if (bitmap != null)
327 | {
328 | MemoryStream stream = new MemoryStream();
329 | bitmap.Save(stream, GetImageFormat(imageFormat));
330 | stream.Position = 0;
331 | return stream;
332 | }
333 | return null;
334 | }
335 | ///
336 | /// Create a thumbnail from file and returns as bytes.
337 | ///
338 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
339 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
340 | /// Correct image file location.
341 | /// Image format to use.
342 | /// A thumbnail image as bytes. Returns null if it fails.
343 | /// 'imageFileLocation' is null.
344 | /// 'imageFileLocation' does not exist.
345 | public byte[] CreateThumbnailBytes(uint thumbnailSize, string imageFileLocation, Format imageFormat)
346 | {
347 | if (String.IsNullOrEmpty(imageFileLocation))
348 | throw new ArgumentNullException(nameof(imageFileLocation), "'imageFileLocation' cannot be null");
349 | if (!File.Exists(imageFileLocation))
350 | throw new FileNotFoundException($"'{imageFileLocation}' cannot be found");
351 | Stream stream = CreateThumbnailStream(thumbnailSize, imageFileLocation, imageFormat);
352 | if (stream != null)
353 | {
354 | byte[] streamBytes = new byte[stream.Length];
355 | stream.Read(streamBytes, 0, streamBytes.Length);
356 | return streamBytes;
357 | }
358 | return null;
359 | }
360 | ///
361 | /// Create a thumbnail from image stream and returns as bytes.
362 | ///
363 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
364 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
365 | /// Valid image stream object.
366 | /// Image format to use.
367 | /// A thumbnail image as bytes. Returns null if it fails.
368 | /// 'imageStream' is null.
369 | public byte[] CreateThumbnailBytes(uint thumbnailSize, Stream imageStream, Format imageFormat)
370 | {
371 | if (imageStream == null)
372 | throw new ArgumentNullException(nameof(imageStream), "'imageStream' cannot be null");
373 |
374 | Stream stream = CreateThumbnailStream(thumbnailSize, imageStream, imageFormat);
375 | if (stream != null)
376 | {
377 | byte[] streamBytes = new byte[stream.Length];
378 | stream.Read(streamBytes, 0, streamBytes.Length);
379 | return streamBytes;
380 | }
381 | return null;
382 | }
383 | ///
384 | /// Create a thumbnail from image in bytes and returns as bytes.
385 | ///
386 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
387 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
388 | /// Valid image bytes array.
389 | /// Image format to use.
390 | /// A thumbnail image as bytes. Returns null if it fails.
391 | /// 'imageBytes' is null.
392 | public byte[] CreateThumbnailBytes(uint thumbnailSize, byte[] imageBytes, Format imageFormat)
393 | {
394 | if (imageBytes == null)
395 | throw new ArgumentNullException(nameof(imageBytes), "'imageStream' cannot be null");
396 | Stream stream = CreateThumbnailStream(thumbnailSize, imageBytes, imageFormat);
397 | if (stream != null)
398 | {
399 | byte[] streamBytes = new byte[stream.Length];
400 | stream.Read(streamBytes, 0, streamBytes.Length);
401 | return streamBytes;
402 | }
403 | return null;
404 | }
405 |
406 |
407 | ///
408 | /// Create a thumbnail from valid image url asynchronously.
409 | ///
410 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
411 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
412 | /// Valid absolute url address with proper scheme.
413 | /// Image format to use.
414 | /// A thumbnail image as stream. Returns null if it fails.
415 | /// 'urlAddress' is null.
416 | public async Task CreateThumbnailStreamAsync(uint thumbnailSize, Uri urlAddress, Format imageFormat)
417 | {
418 | if (urlAddress == null)
419 | throw new ArgumentNullException(nameof(urlAddress), "'urlAddress' cannot be null");
420 | Stream result = null;
421 | Stream stream = await GetImageStreamFromUrl(urlAddress);
422 | if (stream != null)
423 | {
424 | result = CreateThumbnailStream(thumbnailSize, stream, imageFormat);
425 | }
426 | return result;
427 | }
428 |
429 | ///
430 | /// Create a thumbnail from valid image url asynchronously.
431 | ///
432 | /// Thumbnail size. For portrait image, thumbnail size must be less than its height.
433 | /// For landscape image, thumbnail size must be less than its width. For the same size image (Proportional), thumbnail size must be less than its width and height.
434 | /// Valid absolute url address with proper scheme.
435 | /// Image format to use.
436 | /// A thumbnail image as bytes. Returns null if it fails.
437 | /// 'urlAddress' is null.
438 | public async Task CreateThumbnailBytesAsync(uint thumbnailSize, Uri urlAddress, Format imageFormat)
439 | {
440 | if (urlAddress == null)
441 | throw new ArgumentNullException(nameof(urlAddress), "'urlAddress' cannot be null");
442 | byte[] result = null;
443 | byte[] imageBytes = await GetImageBytesFromUrl(urlAddress);
444 | if (imageBytes != null)
445 | {
446 | result = CreateThumbnailBytes(thumbnailSize, imageBytes, imageFormat);
447 | }
448 | return result;
449 | }
450 |
451 |
452 |
453 | }
454 | }
455 |
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/ThumbnailSharp/ThumbnailSharp.csproj:
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1 |
2 |
3 |
4 |
5 | Debug
6 | AnyCPU
7 | {0F6E03AA-E5D9-4E2C-BE26-A7C396705BDF}
8 | Library
9 | Properties
10 | ThumbnailSharp
11 | ThumbnailSharp
12 | v4.5
13 | 512
14 |
15 |
16 |
17 | true
18 | full
19 | false
20 | bin\Debug\
21 | DEBUG;TRACE
22 | prompt
23 | 4
24 | bin\Debug\ThumbnailSharp.xml
25 | false
26 |
27 |
28 | pdbonly
29 | true
30 | bin\Release\
31 | TRACE
32 | prompt
33 | 4
34 | bin\Release\ThumbnailSharp.xml
35 | false
36 |
37 |
38 |
39 |
40 |
41 |
42 |
43 |
44 |
45 |
46 |
47 |
48 |
49 |
50 |
51 |
52 |
53 |
54 |
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