mirror of
https://github.com/ShareX/ShareX.git
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140 lines
No EOL
4.8 KiB
C#
140 lines
No EOL
4.8 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (C) 2007-2014 ShareX Developers
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Windows.Forms;
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namespace HelpersLib
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{
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public partial class LayeredForm : Form
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{
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public LayeredForm()
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{
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InitializeComponent();
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}
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#region Windows Form Designer generated code
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/// <summary>
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/// Required designer variable.
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/// </summary>
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private System.ComponentModel.IContainer components = null;
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/// <summary>
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/// Clean up any resources being used.
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/// </summary>
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/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
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protected override void Dispose(bool disposing)
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{
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if (disposing && (components != null))
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{
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components.Dispose();
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}
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base.Dispose(disposing);
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}
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/// <summary>
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/// Required method for Designer support - do not modify
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/// the contents of this method with the code editor.
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/// </summary>
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private void InitializeComponent()
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{
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this.SuspendLayout();
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this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
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this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
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this.ClientSize = new System.Drawing.Size(292, 273);
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this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
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this.Name = "LayeredForm";
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this.ShowInTaskbar = false;
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this.Text = "LayeredForm";
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this.TopMost = true;
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this.ResumeLayout(false);
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}
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#endregion Windows Form Designer generated code
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protected override CreateParams CreateParams
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{
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get
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{
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CreateParams createParams = base.CreateParams;
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createParams.ExStyle |= (int)WindowStyles.WS_EX_LAYERED;
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return createParams;
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}
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}
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public void SelectBitmap(Bitmap bitmap)
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{
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SelectBitmap(bitmap, 255);
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}
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public void SelectBitmap(Bitmap bitmap, int opacity)
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{
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if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
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{
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throw new ApplicationException("The bitmap must be 32bpp with alpha-channel.");
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}
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IntPtr screenDc = NativeMethods.GetDC(IntPtr.Zero);
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IntPtr memDc = NativeMethods.CreateCompatibleDC(screenDc);
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IntPtr hBitmap = IntPtr.Zero;
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IntPtr hOldBitmap = IntPtr.Zero;
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try
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{
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hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
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hOldBitmap = NativeMethods.SelectObject(memDc, hBitmap);
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SIZE newSize = new SIZE(bitmap.Width, bitmap.Height);
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POINT sourceLocation = new POINT(0, 0);
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POINT newLocation = new POINT(this.Left, this.Top);
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BLENDFUNCTION blend = new BLENDFUNCTION();
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blend.BlendOp = NativeMethods.AC_SRC_OVER;
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blend.BlendFlags = 0;
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blend.SourceConstantAlpha = (byte)opacity;
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blend.AlphaFormat = NativeMethods.AC_SRC_ALPHA;
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NativeMethods.UpdateLayeredWindow(this.Handle, screenDc, ref newLocation, ref newSize, memDc, ref sourceLocation, 0, ref blend, NativeMethods.ULW_ALPHA);
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}
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finally
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{
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NativeMethods.ReleaseDC(IntPtr.Zero, screenDc);
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if (hBitmap != IntPtr.Zero)
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{
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NativeMethods.SelectObject(memDc, hOldBitmap);
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NativeMethods.DeleteObject(hBitmap);
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}
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NativeMethods.DeleteDC(memDc);
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}
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}
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}
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} |