120 lines
4.5 KiB
C#
120 lines
4.5 KiB
C#
/*
|
|
*
|
|
* (c) Copyright Ascensio System Limited 2010-2018
|
|
*
|
|
* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
|
|
* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
|
|
* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
|
|
* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
|
|
*
|
|
* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
|
|
* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
|
|
*
|
|
* You can contact Ascensio System SIA by email at sales@onlyoffice.com
|
|
*
|
|
* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
|
|
* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
|
|
*
|
|
* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
|
|
* relevant author attributions when distributing the software. If the display of the logo in its graphic
|
|
* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
|
|
* in every copy of the program you distribute.
|
|
* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
|
|
*
|
|
*/
|
|
|
|
|
|
using System.IO;
|
|
|
|
using SixLabors.ImageSharp;
|
|
using SixLabors.ImageSharp.Drawing.Processing;
|
|
using SixLabors.ImageSharp.Formats;
|
|
using SixLabors.ImageSharp.Formats.Png;
|
|
using SixLabors.ImageSharp.PixelFormats;
|
|
using SixLabors.ImageSharp.Processing;
|
|
|
|
|
|
namespace ASC.Web.Core
|
|
{
|
|
public static class CommonPhotoManager
|
|
{
|
|
|
|
public static Image DoThumbnail(Image image, Size size, bool crop, bool transparent, bool rectangle)
|
|
{
|
|
var width = size.Width;
|
|
var height = size.Height;
|
|
var realWidth = image.Width;
|
|
var realHeight = image.Height;
|
|
|
|
Image thumbnail;
|
|
|
|
var maxSide = realWidth > realHeight ? realWidth : realHeight;
|
|
var minSide = realWidth < realHeight ? realWidth : realHeight;
|
|
|
|
var alignWidth = crop ? (minSide == realWidth) : (maxSide == realWidth);
|
|
|
|
var scaleFactor = alignWidth ? (realWidth / (1.0 * width)) : (realHeight / (1.0 * height));
|
|
|
|
if (scaleFactor < 1) scaleFactor = 1;
|
|
|
|
int locationX, locationY;
|
|
int finalWidth, finalHeigth;
|
|
|
|
finalWidth = (int)(realWidth / scaleFactor);
|
|
finalHeigth = (int)(realHeight / scaleFactor);
|
|
|
|
|
|
if (rectangle)
|
|
{
|
|
thumbnail = new Image<Rgba32>(width, height);
|
|
locationY = (int)((height / 2.0) - (finalHeigth / 2.0));
|
|
locationX = (int)((width / 2.0) - (finalWidth / 2.0));
|
|
|
|
if (!transparent)
|
|
{
|
|
thumbnail.Mutate(x=> x.Clear(Color.White));
|
|
}
|
|
var point = new Point(locationX, locationY);
|
|
image.Mutate(y => y.Resize(finalWidth, finalHeigth));
|
|
thumbnail.Mutate(x => x.DrawImage(image, point, 1));
|
|
}
|
|
else
|
|
{
|
|
thumbnail = new Image<Rgba32>(finalWidth, finalHeigth);
|
|
|
|
if (!transparent)
|
|
{
|
|
thumbnail.Mutate(x => x.Clear(Color.White));
|
|
}
|
|
image.Mutate(y => y.Resize(finalWidth, finalHeigth));
|
|
thumbnail.Mutate(x => x.DrawImage(image, 1));
|
|
}
|
|
|
|
return thumbnail;
|
|
}
|
|
|
|
public static byte[] SaveToBytes(Image img)
|
|
{
|
|
using var memoryStream = new MemoryStream();
|
|
img.Save(memoryStream, PngFormat.Instance);
|
|
return memoryStream.ToArray();
|
|
}
|
|
|
|
public static byte[] SaveToBytes(Image img, IImageFormat imageFormat)
|
|
{
|
|
byte[] data;
|
|
using (var memoryStream = new MemoryStream())
|
|
{
|
|
img.Save(memoryStream, imageFormat);
|
|
data = memoryStream.ToArray();
|
|
}
|
|
return data;
|
|
}
|
|
|
|
public static string GetImgFormatName(IImageFormat format)
|
|
{
|
|
return format.Name.ToLower();
|
|
}
|
|
}
|
|
}
|