// HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
public static int BeginPaint(int hwnd, int lps) {
WinWindow win = WinWindow.get(hwnd);
if (lps == 0) return 0;
Caret.HideCaret(hwnd);
int rgn = WinRegion.CreateRectRgn(0, 0, win.rectWindow.width(), win.rectWindow.height());
Message.SendMessageA(hwnd, WM_NCPAINT, rgn, 0);
GdiObj.DeleteObject(rgn);
WinDC dc = win.getDC();
if (win.invalidationRect == null) {
new WinRect(0, 0, win.rectClient.width(), win.rectClient.height()).write(lps + 8);
} else {
dc.clipX = win.invalidationRect.left;
dc.clipY = win.invalidationRect.top;
dc.clipCx = win.invalidationRect.width();
dc.clipCy = win.invalidationRect.height();
win.invalidationRect.write(lps + 8);
}
int hdc = dc.handle;
writed(lps, hdc);
writed(lps + 4, Message.SendMessageA(hwnd, WM_ERASEBKGND, hdc, 0));
return readd(lps);
}
// int GetUpdateRgn(HWND hWnd, HRGN hRgn, BOOL bErase)
public static int GetUpdateRgn(int hWnd, int hRgn, int bErase) {
WinWindow win = WinWindow.get(hWnd);
WinRegion rgn = WinRegion.get(hRgn);
if (win == null || rgn == null) return ERROR;
if (win.needsPainting()) {
if (bErase != 0) {
rgn.rects.clear();
rgn.rects.add(new WinRect(0, 0, win.rectWindow.width(), win.rectWindow.height()));
Message.SendMessageA(hWnd, WM_NCPAINT, hRgn, 0);
int hdc = win.getDC().handle;
Message.SendMessageA(hWnd, WM_ERASEBKGND, hdc, 0);
ReleaseDC(hWnd, hdc);
}
rgn.rects.clear();
rgn.rects.add(new WinRect(0, 0, win.rectClient.width(), win.rectClient.height()));
return SIMPLEREGION;
}
return NULLREGION;
}