hwnd.setPointer(Native.getWindowPointer(w));
return hwnd;
}
private void updateW32(boolean a, boolean i) {
User32 user = User32.INSTANCE;
GDI32 gdi = GDI32.INSTANCE;
HWND hWnd = null;
if (!alphaWindow.isDisplayable()) {
alphaWindow.pack();
hWnd = getHwnd(alphaWindow);
int flags = user.GetWindowLong(hWnd, WinUser.GWL_EXSTYLE);
flags |= WinUser.WS_EX_LAYERED;
user.SetWindowLong(hWnd, WinUser.GWL_EXSTYLE, flags);
Window parent = alphaWindow.getOwner();
Point where = parent.getLocationOnScreen();
where.translate(parent.getWidth(), 0);
alphaWindow.setLocation(where);
}
else {
hWnd = getHwnd(alphaWindow);
}
if (i) {
int w = image.getWidth(null);
int h = image.getHeight(null);
HDC screenDC = user.GetDC(null);
HDC memDC = gdi.CreateCompatibleDC(screenDC);
HBITMAP hBitmap = null;
HANDLE oldBitmap = null;
try {
BufferedImage buf = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB_PRE);
Graphics g = buf.getGraphics();
g.drawImage(image, 0, 0, w, h, null);
BITMAPINFO bmi = new BITMAPINFO();
bmi.bmiHeader.biWidth = w;
bmi.bmiHeader.biHeight = h;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = WinGDI.BI_RGB;
bmi.bmiHeader.biSizeImage = w * h * 4;
PointerByReference ppbits = new PointerByReference();
hBitmap = gdi.CreateDIBSection(memDC, bmi, WinGDI.DIB_RGB_COLORS,
ppbits, null, 0);
oldBitmap = gdi.SelectObject(memDC, hBitmap);
Pointer pbits = ppbits.getValue();
Raster raster = buf.getData();
int[] pixel = new int[4];
int[] bits = new int[w*h];
for (int y=0;y < h;y++) {
for (int x=0;x < w;x++) {
raster.getPixel(x, h-y-1, pixel);
int alpha = (pixel[3]&0xFF)<<24;
int red = (pixel[2]&0xFF);
int green = (pixel[1]&0xFF)<<8;
int blue = (pixel[0]&0xFF)<<16;
bits[x + y * w] = alpha|red|green|blue;
}
}
pbits.write(0, bits, 0, bits.length);
SIZE size = new SIZE();
size.cx = w;
size.cy = h;
POINT loc = new POINT();
loc.x = alphaWindow.getX();
loc.y = alphaWindow.getY();
POINT srcLoc = new POINT();
BLENDFUNCTION blend = new BLENDFUNCTION();
blend.SourceConstantAlpha = (byte)(alpha * 255);
blend.AlphaFormat = WinUser.AC_SRC_ALPHA;
user.UpdateLayeredWindow(hWnd, screenDC, loc, size, memDC, srcLoc,
0, blend, WinUser.ULW_ALPHA);
}
finally {
user.ReleaseDC(null, screenDC);
if (hBitmap != null) {
gdi.SelectObject(memDC, oldBitmap);
gdi.DeleteObject(hBitmap);
}
gdi.DeleteDC(memDC);
}
}
else if (a) {
BLENDFUNCTION blend = new BLENDFUNCTION();
blend.SourceConstantAlpha = (byte)(alpha * 255);
blend.AlphaFormat = WinUser.AC_SRC_ALPHA;
user.UpdateLayeredWindow(hWnd, null, null, null, null, null,
0, blend, WinUser.ULW_ALPHA);
}
if (!alphaWindow.isVisible()) {
alphaWindow.setVisible(true);