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103 lines
4.2 KiB
C#
103 lines
4.2 KiB
C#
//
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// Copyright (c) 2012 Virtual Cable S.L.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Virtual Cable S.L. nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// author: Adolfo Gómez, dkmaster at dkmon dot com
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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using System.Drawing;
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using System.Drawing.Imaging;
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namespace UdsAdmin.gui
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{
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class Helpers
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{
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/// <summary>
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/// Method to convert an string in base64 to an image
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/// </summary>
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/// <param name="base64">String with base64 data</param>
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/// <returns>Image produced from the string provided</returns>
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public static Bitmap ImageFromBase64(string base64)
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{
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byte[] raw = Convert.FromBase64String(base64);
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System.ComponentModel.TypeConverter tc = System.ComponentModel.TypeDescriptor.GetConverter(typeof(Bitmap));
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return (Bitmap)tc.ConvertFrom(raw);
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}
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public static Icon IconFromBase64(string base64)
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{
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return Icon.FromHandle(gui.Helpers.ImageFromBase64(base64).GetHicon());
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}
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/// <summary>
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/// method for changing the opacity of an image
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/// </summary>
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/// <param name="image">image to set opacity on</param>
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/// <param name="opacity">percentage of opacity</param>
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/// <returns>new Image with the opacity</returns>
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public static Image SetImageOpacity(Image image, float opacity)
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{
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try
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{
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//create a Bitmap the size of the image provided
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Bitmap bmp = new Bitmap(image.Width, image.Height);
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//create a graphics object from the image
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using (Graphics gfx = Graphics.FromImage(bmp))
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{
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//create a color matrix object
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ColorMatrix matrix = new ColorMatrix();
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//set the opacity
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matrix.Matrix33 = opacity;
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//create image attributes
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ImageAttributes attributes = new ImageAttributes();
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//set the color(opacity) of the image
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attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
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//now draw the image
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gfx.DrawImage(image, new Rectangle(0, 0, bmp.Width, bmp.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes);
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}
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return bmp;
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}
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catch (Exception ex)
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{
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MessageBox.Show(ex.Message);
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return null;
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}
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}
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}
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}
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