// Creates the window. This function expects not to be called on a ContextThread
func (wi *windowInternal) initialize(monitor *Monitor, mode VideoMode, title string, style WindowStyle) ThreadError {
// Compute position and size
screenDC := C.GetDC(nil)
width := C.int(mode.Width)
height := C.int(mode.Height)
left := (C.GetDeviceCaps(screenDC, C.HORZRES) - width) / 2
top := (C.GetDeviceCaps(screenDC, C.VERTRES) - height) / 2
C.ReleaseDC(nil, screenDC)
// Choose the window style according to the Style parameter
win32Style := C.DWORD(C.WS_VISIBLE)
if style == WindowStyleNone {
win32Style |= C.WS_POPUP
} else {
if style&WindowStyleTitlebar != 0 {
win32Style |= C.WS_CAPTION | C.WS_MINIMIZEBOX
}
if style&WindowStyleResize != 0 {
win32Style |= C.WS_THICKFRAME | C.WS_MAXIMIZEBOX
}
if style&WindowStyleClose != 0 {
win32Style |= C.WS_SYSMENU
}
}
// In windowed mode, adjust width and height so that window will have the requested client area
fullscreen := style&WindowStyleFullscreen != 0
if !fullscreen {
rectangle := C.RECT{
left: C.LONG(left),
top: C.LONG(top),
right: C.LONG(left + width),
bottom: C.LONG(top + height),
}
C.__AdjustWindowRect(&rectangle, win32Style, C.FALSE)
left = C.int(rectangle.left)
top = C.int(rectangle.top)
width = C.int(rectangle.right - rectangle.left)
height = C.int(rectangle.bottom - rectangle.top)
}
wTitle, _ := utf16Convert(title)
wi.window.Handle = C.CreateWindowExW(0, className, wTitle, win32Style, left, top, width, height, nil, nil, windowClass.hInstance, C.LPVOID(wi))
// Switch to fullscreen if requested
if fullscreen {
wi.switchToFullscreen(monitor, mode)
}
return nil
}
func (ic *contextInternal) close() ThreadError {
// start by waiting for deactivation to finish
<-ic.deactivateSignal
// Destroy the OpenGL context
if ic.context != nil {
C.wglDeleteContext(ic.context)
}
// Destroy the device context
if ic.hdc != nil {
C.ReleaseDC(ic.window, ic.hdc)
}
// Destroy the window if we own it
if ic.window != nil && ic.ownsWindow {
C.DestroyWindow(ic.window)
}
return nil
}