private void SetBitmap(Bitmap img, byte opacity)
{
IntPtr screenDc = GetDC(IntPtr.Zero);
IntPtr memDc = CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try {
hBitmap = img.GetHbitmap(Color.FromArgb(0));
oldBitmap = SelectObject(memDc, hBitmap);
Size size = new Size(img.Width, img.Height);
Point pointSource = new Point(0, 0);
Point topPos = new Point(Left, Top);
BlendF blend = new BlendF();
blend.BlendOp = AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = AC_SRC_ALPHA;
UpdateLayeredWindow(this.Handle, screenDc, ref topPos, ref size,
memDc, ref pointSource, 0, ref blend, LWA_ALPHA);
}
finally {
ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
SelectObject(memDc, oldBitmap);
DeleteObject(hBitmap);
}
DeleteDC(memDc);
}
}
private void SetBitmap(Bitmap img, byte opacity)
{
if (img.PixelFormat != PixelFormat.Format32bppArgb)
{
MessageBox.Show("Image format not accepted." + "\r\n\r\n" +
"Please use one of the allowed formats:" + "\r\n" +
" -- 32bit alphablended (rgba) .PNG",
"Oy, bakayaro.", MessageBoxButtons.OK,
MessageBoxIcon.Exclamation);
this.Close(); return;
}
IntPtr screenDc = GetDC(IntPtr.Zero);
IntPtr memDc = CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try {
hBitmap = img.GetHbitmap(Color.FromArgb(0));
oldBitmap = SelectObject(memDc, hBitmap);
Size size = new Size(img.Width, img.Height);
Point pointSource = new Point(0, 0);
Point topPos = new Point(Left, Top);
BlendF blend = new BlendF();
blend.BlendOp = AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = AC_SRC_ALPHA;
UpdateLayeredWindow(this.Handle, screenDc, ref topPos, ref size,
memDc, ref pointSource, 0, ref blend, LWA_ALPHA);
}
finally {
ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
SelectObject(memDc, oldBitmap);
DeleteObject(hBitmap);
}
DeleteDC(memDc);
}
}
private void SetBitmap(Bitmap img, byte opacity)
{
if (img.PixelFormat != PixelFormat.Format32bppArgb)
{
MessageBox.Show("Only accepts 32bit alphablended .png images");
System.Diagnostics.Process.GetCurrentProcess().Kill();
}
IntPtr screenDc = GetDC(IntPtr.Zero);
IntPtr memDc = CreateCompatibleDC(screenDc);
IntPtr hBitmap = IntPtr.Zero;
IntPtr oldBitmap = IntPtr.Zero;
try
{
hBitmap = img.GetHbitmap(Color.FromArgb(0));
oldBitmap = SelectObject(memDc, hBitmap);
Size size = new Size(img.Width, img.Height);
Point pointSource = new Point(0, 0);
Point topPos = new Point(Left, Top);
BlendF blend = new BlendF();
blend.BlendOp = AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opacity;
blend.AlphaFormat = AC_SRC_ALPHA;
UpdateLayeredWindow(this.Handle, screenDc, ref topPos, ref size,
memDc, ref pointSource, 0, ref blend, LWA_ALPHA);
}
finally
{
ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
SelectObject(memDc, oldBitmap);
DeleteObject(hBitmap);
}
DeleteDC(memDc);
}
}
public static extern bool UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pprSrc, Int32 crKey, ref BlendF pblend, Int32 dwFlags);
