コード例 #1
0
        /// <para>Changes the current bitmap with a custom opacity level.  Here is where all happens!</para>
        public void SetBitmap(Bitmap bitmap, byte opacity)
        {
            if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
            {
                throw new ApplicationException("The bitmap must be 32bpp with alpha-channel.");
            }

            Bitmap bmWindow = new Bitmap(Width, Height, PixelFormat.Format32bppArgb);                   // NEW:
            //		Bitmap bmWindow = bitmap;
            Graphics g = Graphics.FromImage(bmWindow);

            g.Clear(Color.FromArgb(0, 0, 0, 0));
            g.DrawImage(bitmap, 0, 0, bmWindow.Width, bmWindow.Height);
            g.Flush();

            IntPtr memDc = g.GetHdc();

            //		Win32.Bool fSuccess = Win32.PrintWindow(Handle, memDc, 0); // NEW:

            int err = Marshal.GetLastWin32Error();

            if (err != 1400)
            {
                Win32.Size          size        = new Win32.Size(bmWindow.Width, bmWindow.Height);
                Win32.Point         pointSource = new Win32.Point(0, 0);
                Win32.Point         topPos      = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend       = new Win32.BLENDFUNCTION();
                blend.BlendOp             = Win32.AC_SRC_OVER;
                blend.BlendFlags          = 0;
                blend.SourceConstantAlpha = opacity;
                blend.AlphaFormat         = Win32.AC_SRC_ALPHA;
                Win32.GdiFlush();
                //			BackgroundImage = bmWindow;
                IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
                Win32.ReleaseDC(IntPtr.Zero, screenDc);
            }
            g.ReleaseHdc(memDc);
            g.Dispose();
        }
コード例 #2
0
        public void SetBitmap(Bitmap bitmap, byte opacity)
        {
            if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
            {
                throw new ApplicationException("The bitmap must be 32bpp with alpha-channel.");
            }
            IntPtr screenDc  = Win32.GetDC(IntPtr.Zero);
            IntPtr memDc     = Win32.CreateCompatibleDC(screenDc);
            IntPtr hBitmap   = IntPtr.Zero;
            IntPtr oldBitmap = IntPtr.Zero;

            try {
                hBitmap   = bitmap.GetHbitmap(Color.FromArgb(0));                // grab a GDI handle from this GDI+ bitmap
                oldBitmap = Win32.SelectObject(memDc, hBitmap);

                Win32.Size          size        = new Win32.Size(bitmap.Width, bitmap.Height);
                Win32.Point         pointSource = new Win32.Point(0, 0);
                Win32.Point         topPos      = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend       = new Win32.BLENDFUNCTION();
                blend.BlendOp             = Win32.AC_SRC_OVER;
                blend.BlendFlags          = 0;
                blend.SourceConstantAlpha = opacity;
                blend.AlphaFormat         = Win32.AC_SRC_ALPHA;

                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
            }
            finally {
                Win32.ReleaseDC(IntPtr.Zero, screenDc);
                if (hBitmap != IntPtr.Zero)
                {
                    Win32.SelectObject(memDc, oldBitmap);
                    //Windows.DeleteObject(hBitmap); // The documentation says that we have to use the Windows.DeleteObject... but since there is no such method I use the normal DeleteObject from Win32 GDI and it's working fine without any resource leak.
                    Win32.DeleteObject(hBitmap);
                }
                Win32.DeleteDC(memDc);
            }
        }
コード例 #3
0
        public void SetBitmap(Bitmap bitmap, byte opacity)
        {
            if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
                throw new ApplicationException("The bitmap must be 32bpp with alpha-channel.");
            IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
            IntPtr memDc = Win32.CreateCompatibleDC(screenDc);
            IntPtr hBitmap = IntPtr.Zero;
            IntPtr oldBitmap = IntPtr.Zero;

            try {
                hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));  // grab a GDI handle from this GDI+ bitmap
                oldBitmap = Win32.SelectObject(memDc, hBitmap);

                Win32.Size size = new Win32.Size(bitmap.Width, bitmap.Height);
                Win32.Point pointSource = new Win32.Point(0, 0);
                Win32.Point topPos = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
                blend.BlendOp             = Win32.AC_SRC_OVER;
                blend.BlendFlags          = 0;
                blend.SourceConstantAlpha = opacity;
                blend.AlphaFormat         = Win32.AC_SRC_ALPHA;

                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
            }
            finally {
                Win32.ReleaseDC(IntPtr.Zero, screenDc);
                if (hBitmap != IntPtr.Zero) {
                    Win32.SelectObject(memDc, oldBitmap);
                    //Windows.DeleteObject(hBitmap); // The documentation says that we have to use the Windows.DeleteObject... but since there is no such method I use the normal DeleteObject from Win32 GDI and it's working fine without any resource leak.
                    Win32.DeleteObject(hBitmap);
                }
                Win32.DeleteDC(memDc);
            }
        }
コード例 #4
0
        /// <para>Changes the current bitmap with a custom opacity level.  Here is where all happens!</para>
        public void SetBitmap(Bitmap bitmap, byte opacity)
        {
            if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
                throw new ApplicationException("The bitmap must be 32bpp with alpha-channel.");

            Bitmap bmWindow = new Bitmap(Width, Height, PixelFormat.Format32bppArgb);	// NEW:
            //		Bitmap bmWindow = bitmap;
            Graphics g = Graphics.FromImage(bmWindow);
            g.Clear(Color.FromArgb(0, 0, 0, 0));
            g.DrawImage(bitmap, 0, 0, bmWindow.Width, bmWindow.Height);
            g.Flush();

            IntPtr memDc = g.GetHdc();

            //		Win32.Bool fSuccess = Win32.PrintWindow(Handle, memDc, 0); // NEW:

            int err = Marshal.GetLastWin32Error();
            if (err != 1400) {
                Win32.Size size = new Win32.Size(bmWindow.Width, bmWindow.Height);
                Win32.Point pointSource = new Win32.Point(0, 0);
                Win32.Point topPos = new Win32.Point(Left, Top);
                Win32.BLENDFUNCTION blend = new Win32.BLENDFUNCTION();
                blend.BlendOp             = Win32.AC_SRC_OVER;
                blend.BlendFlags          = 0;
                blend.SourceConstantAlpha = opacity;
                blend.AlphaFormat         = Win32.AC_SRC_ALPHA;
                Win32.GdiFlush();
            //			BackgroundImage = bmWindow;
                IntPtr screenDc = Win32.GetDC(IntPtr.Zero);
                Win32.UpdateLayeredWindow(Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0, ref blend, Win32.ULW_ALPHA);
                Win32.ReleaseDC(IntPtr.Zero, screenDc);
            }
            g.ReleaseHdc(memDc);
            g.Dispose();
        }