112 lines
4.0 KiB
C#
112 lines
4.0 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Web.Core;
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public static class CommonPhotoManager
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{
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public static Image DoThumbnail(Image image, Size size, bool crop, bool transparent, bool rectangle)
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{
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var width = size.Width;
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var height = size.Height;
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var realWidth = image.Width;
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var realHeight = image.Height;
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Image thumbnail;
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var maxSide = realWidth > realHeight ? realWidth : realHeight;
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var minSide = realWidth < realHeight ? realWidth : realHeight;
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var alignWidth = crop ? (minSide == realWidth) : (maxSide == realWidth);
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var scaleFactor = alignWidth ? (realWidth / (1.0 * width)) : (realHeight / (1.0 * height));
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if (scaleFactor < 1)
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{
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scaleFactor = 1;
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}
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int locationX, locationY;
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int finalWidth, finalHeigth;
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finalWidth = (int)(realWidth / scaleFactor);
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finalHeigth = (int)(realHeight / scaleFactor);
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if (rectangle)
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{
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thumbnail = new Image<Rgba32>(width, height);
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locationY = (int)((height / 2.0) - (finalHeigth / 2.0));
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locationX = (int)((width / 2.0) - (finalWidth / 2.0));
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if (!transparent)
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{
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thumbnail.Mutate(x => x.BackgroundColor(Color.White));
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}
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var point = new Point(locationX, locationY);
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image.Mutate(y => y.Resize(finalWidth, finalHeigth));
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thumbnail.Mutate(x => x.DrawImage(image, point, 1));
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}
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else
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{
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thumbnail = new Image<Rgba32>(finalWidth, finalHeigth);
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if (!transparent)
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{
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thumbnail.Mutate(x => x.BackgroundColor(Color.White));
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}
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image.Mutate(y => y.Resize(finalWidth, finalHeigth));
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thumbnail.Mutate(x => x.DrawImage(image, 1));
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}
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return thumbnail;
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}
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public static byte[] SaveToBytes(Image img)
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{
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using var memoryStream = new MemoryStream();
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img.Save(memoryStream, PngFormat.Instance);
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return memoryStream.ToArray();
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}
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public static byte[] SaveToBytes(Image img, IImageFormat imageFormat)
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{
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byte[] data;
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using (var memoryStream = new MemoryStream())
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{
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img.Save(memoryStream, imageFormat);
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data = memoryStream.ToArray();
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}
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return data;
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}
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public static string GetImgFormatName(IImageFormat format)
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{
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return format.Name.ToLower();
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}
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}
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