public void SetBits()
{
if (BackgroundImage != null)
{
//绘制绘图层背景
Bitmap bitmap = new Bitmap(BackgroundImage, base.Width, base.Height);
if (!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))
throw new ApplicationException("图片必须是32位带Alhpa通道的图片。");
IntPtr oldBits = IntPtr.Zero;
IntPtr screenDC = NativeMethods.GetDC(IntPtr.Zero);
IntPtr hBitmap = IntPtr.Zero;
IntPtr memDc = NativeMethods.CreateCompatibleDC(screenDC);
try
{
NativeMethods.Point topLoc = new NativeMethods.Point(Left, Top);
NativeMethods.Size bitMapSize = new NativeMethods.Size(Width, Height);
NativeMethods.BLENDFUNCTION blendFunc = new NativeMethods.BLENDFUNCTION();
NativeMethods.Point srcLoc = new NativeMethods.Point(0, 0);
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
oldBits = NativeMethods.SelectObject(memDc, hBitmap);
blendFunc.BlendOp = AC.AC_SRC_OVER;
blendFunc.SourceConstantAlpha = Byte.Parse("255");
blendFunc.AlphaFormat = AC.AC_SRC_ALPHA;
blendFunc.BlendFlags = 0;
NativeMethods.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0, ref blendFunc, NativeMethods.ULW_ALPHA);
}
finally
{
if (hBitmap != IntPtr.Zero)
{
NativeMethods.SelectObject(memDc, oldBits);
NativeMethods.DeleteObject(hBitmap);
}
NativeMethods.ReleaseDC(IntPtr.Zero, screenDC);
NativeMethods.DeleteDC(memDc);
}
}
}
public void SetBits()
{
//绘制绘图层背景
Bitmap bitmap = new Bitmap(Main.Width + Main.ShadowWidth * 2, Main.Height + Main.ShadowWidth * 2);
//Rectangle _BacklightLTRB = new Rectangle(20, 20, 20, 20);//窗体光泽重绘边界
Graphics g = Graphics.FromImage(bitmap);
g.SmoothingMode = SmoothingMode.HighQuality; //高质量
g.PixelOffsetMode = PixelOffsetMode.HighQuality; //高像素偏移质量
DrawShadow(g);
//ImageDrawRect.DrawRect(g, Properties.Resources.main_light_bkg_top123, ClientRectangle, Rectangle.FromLTRB(_BacklightLTRB.X, _BacklightLTRB.Y, _BacklightLTRB.Width, _BacklightLTRB.Height), 1, 1);
if (!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))
throw new ApplicationException("图片必须是32位带Alhpa通道的图片。");
IntPtr oldBits = IntPtr.Zero;
IntPtr screenDC = NativeMethods.GetDC(IntPtr.Zero);
IntPtr hBitmap = IntPtr.Zero;
IntPtr memDc = NativeMethods.CreateCompatibleDC(screenDC);
try
{
NativeMethods.Point topLoc = new NativeMethods.Point(Left, Top);
NativeMethods.Size bitMapSize = new NativeMethods.Size(Width, Height);
NativeMethods.BLENDFUNCTION blendFunc = new NativeMethods.BLENDFUNCTION();
NativeMethods.Point srcLoc = new NativeMethods.Point(0, 0);
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
oldBits = NativeMethods.SelectObject(memDc, hBitmap);
blendFunc.BlendOp = AC.AC_SRC_OVER;
blendFunc.SourceConstantAlpha = Byte.Parse("255");
blendFunc.AlphaFormat = AC.AC_SRC_ALPHA;
blendFunc.BlendFlags = 0;
NativeMethods.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0, ref blendFunc, NativeMethods.ULW_ALPHA);
}
finally
{
if (hBitmap != IntPtr.Zero)
{
NativeMethods.SelectObject(memDc, oldBits);
NativeMethods.DeleteObject(hBitmap);
}
NativeMethods.ReleaseDC(IntPtr.Zero, screenDC);
NativeMethods.DeleteDC(memDc);
}
}
