public void SetBits()
{
if (BackgroundImage != null)
{
//绘制绘图层背景
var bitmap = new Bitmap(BackgroundImage, Width, Height);
if (!Image.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Image.IsAlphaPixelFormat(bitmap.PixelFormat))
{
throw new ApplicationException("图片必须是32位带Alhpa通道的图片。");
}
var oldBits = IntPtr.Zero;
var screenDC = NativeMethods.GetDC(IntPtr.Zero);
var hBitmap = IntPtr.Zero;
var memDc = NativeMethods.CreateCompatibleDC(screenDC);
try
{
var topLoc = new Point(Left, Top);
var bitMapSize = new Size(Width, Height);
var blendFunc = new Win32.Struct.BLENDFUNCTION();
var srcLoc = new Point(0, 0);
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
oldBits = NativeMethods.SelectObject(memDc, hBitmap);
blendFunc.BlendOp = AC.AC_SRC_OVER;
blendFunc.SourceConstantAlpha = byte.Parse(Main.SkinOpacity.ToString());
blendFunc.AlphaFormat = AC.AC_SRC_ALPHA;
blendFunc.BlendFlags = 0;
NativeMethods.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, 0,
ref blendFunc, ULW.ULW_ALPHA);
}
finally
{
if (hBitmap != IntPtr.Zero)
{
NativeMethods.SelectObject(memDc, oldBits);
NativeMethods.DeleteObject(hBitmap);
}
NativeMethods.ReleaseDC(IntPtr.Zero, screenDC);
NativeMethods.DeleteDC(memDc);
}
}
}
public static void SetBits(Form form, Bitmap bitmap, byte opcity)
{
if (bitmap.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new ApplicationException("The bitmap must be 32ppp with alpha-channel.");
}
// The ideia of this is very simple,
// 1. Create a compatible DC with screen;
// 2. Select the bitmap with 32bpp with alpha-channel in the compatible DC;
// 3. Call the UpdateLayeredWindow.
var screenDc = NativeMethods.GetDC(IntPtr.Zero);
var memDc = NativeMethods.CreateCompatibleDC(screenDc);
var hBitmap = IntPtr.Zero;
var oldBitmap = IntPtr.Zero;
try
{
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0)); // grab a GDI handle from this GDI+ bitmap
oldBitmap = NativeMethods.SelectObject(memDc, hBitmap);
var size = new Size(bitmap.Width, bitmap.Height);
var pointSource = new Point(0, 0);
var topPos = new Point(form.Left, form.Top);
var blend = new Win32.Struct.BLENDFUNCTION();
blend.BlendOp = AC.AC_SRC_OVER;
blend.BlendFlags = 0;
blend.SourceConstantAlpha = opcity;
blend.AlphaFormat = AC.AC_SRC_ALPHA;
NativeMethods.UpdateLayeredWindow(form.Handle, screenDc, ref topPos, ref size, memDc, ref pointSource, 0,
ref blend, UpdateLayerWindowParameter.ULW_ALPHA);
}
finally
{
NativeMethods.ReleaseDC(IntPtr.Zero, screenDc);
if (hBitmap != IntPtr.Zero)
{
NativeMethods.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 NativeMethods.GDI and it's working fine without any resource leak.
NativeMethods.DeleteObject(hBitmap);
}
NativeMethods.DeleteDC(memDc);
}
bitmap.Dispose();
}
public void SetBits()
{
var image = new Bitmap(Main.Width + (Main.ShadowWidth * 2), Main.Height + (Main.ShadowWidth * 2));
var g = Graphics.FromImage(image);
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
DrawShadow(g);
if (Image.IsCanonicalPixelFormat(image.PixelFormat) && Image.IsAlphaPixelFormat(image.PixelFormat))
{
var zero = IntPtr.Zero;
var dC = NativeMethods.GetDC(IntPtr.Zero);
var hgdiobj = IntPtr.Zero;
var hdc = NativeMethods.CreateCompatibleDC(dC);
try
{
var pptDst = new Win32.Struct.POINT(Left, Top);
var psize = new Win32.Struct.SIZE(Width, Height);
var pblend = new Win32.Struct.BLENDFUNCTION();
var pprSrc = new Win32.Struct.POINT(0, 0);
hgdiobj = image.GetHbitmap(Color.FromArgb(0));
zero = NativeMethods.SelectObject(hdc, hgdiobj);
pblend.BlendOp = 0;
pblend.SourceConstantAlpha = byte.Parse("255");
pblend.AlphaFormat = 1;
pblend.BlendFlags = 0;
NativeMethods.UpdateLayeredWindow(Handle, dC, ref pptDst, ref psize, hdc, ref pprSrc, 0, ref pblend,
2);
return;
}
finally
{
if (hgdiobj != IntPtr.Zero)
{
NativeMethods.SelectObject(hdc, zero);
NativeMethods.DeleteObject(hgdiobj);
}
NativeMethods.ReleaseDC(IntPtr.Zero, dC);
NativeMethods.DeleteDC(hdc);
}
}
throw new ApplicationException("图片必须是32位带Alhpa通道的图片。");
}
public static void SetBits(Form form, Bitmap bitmap)
{
// if (!haveHandle) return;
if (!Image.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Image.IsAlphaPixelFormat(bitmap.PixelFormat))
{
throw new ApplicationException("图片必须是32位带Alhpa通道的图片。");
}
var oldBits = IntPtr.Zero;
var screenDC = NativeMethods.GetDC(IntPtr.Zero);
var hBitmap = IntPtr.Zero;
var memDc = NativeMethods.CreateCompatibleDC(screenDC);
try
{
var topLoc = new Point(form.Left, form.Top);
var bitMapSize = new Size(bitmap.Width, bitmap.Height);
var blendFunc = new Win32.Struct.BLENDFUNCTION();
var srcLoc = new Point(0, 0);
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
oldBits = NativeMethods.SelectObject(memDc, hBitmap);
blendFunc.BlendOp = AC.AC_SRC_OVER;
blendFunc.SourceConstantAlpha = 255;
blendFunc.AlphaFormat = AC.AC_SRC_ALPHA;
blendFunc.BlendFlags = 0;
NativeMethods.UpdateLayeredWindow(form.Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc,
0, ref blendFunc, UpdateLayerWindowParameter.ULW_ALPHA);
}
finally
{
if (hBitmap != IntPtr.Zero)
{
NativeMethods.SelectObject(memDc, oldBits);
NativeMethods.DeleteObject(hBitmap);
}
NativeMethods.ReleaseDC(IntPtr.Zero, screenDC);
NativeMethods.DeleteDC(memDc);
}
}
