public static Graphics FromHwnd(IntPtr hwnd, bool client)
{
if (hwnd == IntPtr.Zero)
{
var scaleFactor = NSScreen.MainScreen.BackingScaleFactor;
var context = new CGBitmapContext(IntPtr.Zero, 1, 1, 8, 4, CGColorSpace.CreateDeviceRGB(), CGImageAlphaInfo.PremultipliedFirst);
context.ScaleCTM(scaleFactor, -scaleFactor);
return(new Graphics(context));
}
Graphics g;
var obj = ObjCRuntime.Runtime.GetNSObject(hwnd);
var view = obj as NSView;
if (view == null && obj is NSWindow && ((NSWindow)obj).GraphicsContext != null)
{
g = new Graphics(((NSWindow)obj).GraphicsContext);
}
else if (NSView.FocusView() == view)
{
if (NSGraphicsContext.CurrentContext == null)
{
return(FromHwnd(IntPtr.Zero, false));
}
g = Graphics.FromCurrentContext();
}
else if (view.LockFocusIfCanDraw())
{
if (NSGraphicsContext.CurrentContext == null)
{
return(FromHwnd(IntPtr.Zero, false));
}
g = Graphics.FromCurrentContext();
g.focusedView = view;
}
else if (view.Window != null && view.Window.GraphicsContext != null)
{
g = new Graphics(view.Window.GraphicsContext);
}
else
{
return(Graphics.FromImage(new Bitmap(1, 1)));
}
if (client)
{
if (view is IClientView clientView)
{
var clientBounds = clientView.ClientBounds;
g.context.ClipToRect(clientBounds);
g.context.TranslateCTM(clientBounds.Left, clientBounds.Top);
g.context.SaveState();
g.hasClientTransform = true;
}
}
return(g);
}
internal static INativeContex GetCGContextForView(IntPtr handle)
{
// IntPtr context = IntPtr.Zero;
NSView focusWindow = null;
// JV - je to OK??
//NSObject whoWrapper = NSObject.Lookup (handle);
NSObject whoWrapper = MonoMac.ObjCRuntime.Runtime.GetNSObject(handle);
NSView viewWrapper = whoWrapper as NSView;
NSWindow windowWrapper = null;
if (null == viewWrapper)
{
windowWrapper = whoWrapper as NSWindow;
}
else
{
windowWrapper = viewWrapper.Window;
}
IntPtr window = windowWrapper.Handle;
NSGraphicsContext gcw = null;
if (handle == IntPtr.Zero || window == IntPtr.Zero)
{
// FIXME: Can we actually get a CGContextRef for the desktop? this makes context IntPtr.Zero
gcw = NSApplication.SharedApplication.Context;
// context = gcw.graphicsPort();
var desktop_bounds = NSRect.Empty;
// NSScreen.mainScreen () returns the screen the the user is currently interacting with.
// To get the screen identified by CGMainDisplayID (), get the 0th element of this array.
NSScreen[] screens = NSScreen.Screens;
if (null != screens && 0 < screens.Length)
{
NSScreen screenWrap = screens[0];
desktop_bounds = screenWrap.Frame;
}
return(new CocoaContext(focusWindow, gcw, (int)desktop_bounds.Width,
(int)desktop_bounds.Height));
}
if (null != viewWrapper && viewWrapper != NSView.FocusView())
{
if (!viewWrapper.LockFocusIfCanDraw())
{
return(null);
}
focusWindow = viewWrapper;
}
gcw = windowWrapper.GraphicsContext;
gcw.SaveGraphicsState();
// context = gcw.graphicsPort();
// NSRect winRect = windowWrapper.frame();
// QDRect window_bounds = new QDRect (winRect.Top, winRect.Left, winRect.Bottom, winRect.Right);
var vuRect = windowWrapper.Frame;
if (null != viewWrapper)
{
vuRect = viewWrapper.Bounds;
vuRect = viewWrapper.ConvertRectToView(vuRect, null);
}
// Rect view_bounds = new Rect (vuRect.origin.x, vuRect.origin.y, vuRect.size.width, vuRect.size.height);
if (vuRect.Height < 0)
{
vuRect.Height = 0;
}
if (vuRect.Width < 0)
{
vuRect.Width = 0;
}
//ASSUMPTION! lockFocus did the translating and clipping.
//ASSUMPTION! The NSView isFlipped.
// CGContextTranslateCTM (context, view_bounds.origin.x, (window_bounds.bottom - window_bounds.top) - (view_bounds.origin.y + view_bounds.size.height));
//
// // Create the original rect path and clip to it
// Rect rc_clip = new Rect (0, 0, view_bounds.size.width, view_bounds.size.height);
//
//
// Rectangle [] clip_rectangles = (Rectangle []) hwnd_delegate.DynamicInvoke (new object [] {handle});
// if (clip_rectangles != null && clip_rectangles.Length > 0) {
// int length = clip_rectangles.Length;
//
// CGContextBeginPath (context);
// CGContextAddRect (context, rc_clip);
//
// for (int i = 0; i < length; i++) {
// CGContextAddRect (context, new Rect (clip_rectangles [i].X, view_bounds.size.height - clip_rectangles [i].Y - clip_rectangles [i].Height, clip_rectangles [i].Width, clip_rectangles [i].Height));
// }
// CGContextClosePath (context);
// CGContextEOClip (context);
//#if DEBUG_CLIPPING
// if (clip_rectangles.Length >= debug_threshold) {
// CGContextSetRGBFillColor (context, red, green, blue, 0.5f);
// CGContextFillRect (context, rc_clip);
// CGContextFlush (context);
// System.Threading.Thread.Sleep (500);
// if (red == 1.0f) { red = 0.0f; blue = 1.0f; }
// else if (blue == 1.0f) { blue = 0.0f; green = 1.0f; }
// else if (green == 1.0f) { green = 0.0f; red = 1.0f; }
// }
//#endif
// } else {
// CGContextBeginPath (context);
// CGContextAddRect (context, rc_clip);
// CGContextClosePath (context);
// CGContextClip (context);
// }
return(new CocoaContext(focusWindow, gcw, (int)vuRect.Width, (int)vuRect.Height));
}