/// <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();
}
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);
}
}
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);
}
}
/// <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();
}
