internal static CocoaContext GetCGContextForNSView(IntPtr handle)
{
if (handle == IntPtr.Zero)
{
return(null);
}
IntPtr focusView = objc_msgSend(objc_getClass("NSView"), sel_registerName("focusView"));
IntPtr focusHandle = IntPtr.Zero;
if (focusView != handle)
{
if (!bool_objc_msgSend(handle, sel_registerName("lockFocusIfCanDraw")))
{
return(null);
}
focusHandle = handle;
}
IntPtr windowHandle = objc_msgSend(handle, sel_registerName("window"));
IntPtr graphicsContext = objc_msgSend(windowHandle, sel_registerName("graphicsContext"));
IntPtr ctx = objc_msgSend(graphicsContext, sel_registerName("graphicsPort"));
bool isFlipped = bool_objc_msgSend(handle, sel_registerName("isFlipped"));
Size size;
CGContextSaveGState(ctx);
if (IntPtr.Size == 4)
{
CGRect32 bounds = new CGRect32();
objc_msgSend_stret(ref bounds, handle, sel_registerName("bounds"));
if (isFlipped)
{
CGContextTranslateCTM32(ctx, bounds.origin.x, bounds.size.height);
CGContextScaleCTM32(ctx, 1.0f, -1.0f);
}
size = new Size((int)bounds.size.width, (int)bounds.size.height);
}
else
{
CGRect64 bounds = new CGRect64();
objc_msgSend_stret(ref bounds, handle, sel_registerName("bounds"));
if (isFlipped)
{
CGContextTranslateCTM64(ctx, bounds.origin.x, bounds.size.height);
CGContextScaleCTM64(ctx, 1.0f, -1.0f);
}
size = new Size((int)bounds.size.width, (int)bounds.size.height);
}
return(new CocoaContext(focusHandle, ctx, size.Width, size.Height));
}
internal static extern void CGContextFillRect(IntPtr context, CGRect32 rect);
internal static extern void CGContextAddRect32(IntPtr context, CGRect32 rect);
internal static extern int HIViewConvertRect(ref CGRect32 r, IntPtr a, IntPtr b);
internal static extern int HIViewGetBounds(IntPtr vHnd, ref CGRect32 r);
public static extern void objc_msgSend_stret(ref CGRect32 arect, IntPtr basePtr, IntPtr selector);
internal static CarbonContext GetCGContextForView(IntPtr handle)
{
IntPtr context = IntPtr.Zero;
IntPtr port = IntPtr.Zero;
IntPtr window = IntPtr.Zero;
if (IntPtr.Size == 8)
{
throw new NotSupportedException();
}
window = GetControlOwner(handle);
if (handle == IntPtr.Zero || window == IntPtr.Zero)
{
// FIXME: Can we actually get a CGContextRef for the desktop? this makes context IntPtr.Zero
port = GetQDGlobalsThePort();
CreateCGContextForPort(port, ref context);
CGRect32 desktop_bounds = CGDisplayBounds32(CGMainDisplayID());
return(new CarbonContext(port, context, (int)desktop_bounds.size.width, (int)desktop_bounds.size.height));
}
QDRect window_bounds = new QDRect();
CGRect32 view_bounds = new CGRect32();
port = GetWindowPort(window);
context = GetContext(port);
GetWindowBounds(window, 32, ref window_bounds);
HIViewGetBounds(handle, ref view_bounds);
HIViewConvertRect(ref view_bounds, handle, IntPtr.Zero);
if (view_bounds.size.height < 0)
{
view_bounds.size.height = 0;
}
if (view_bounds.size.width < 0)
{
view_bounds.size.width = 0;
}
CGContextTranslateCTM32(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
CGRect32 rc_clip = new CGRect32(0, 0, view_bounds.size.width, view_bounds.size.height);
CGContextSaveGState(context);
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);
CGContextAddRect32(context, rc_clip);
for (int i = 0; i < length; i++)
{
CGContextAddRect32(context, new CGRect32(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);
CGContextAddRect32(context, rc_clip);
CGContextClosePath(context);
CGContextClip(context);
}
return(new CarbonContext(port, context, (int)view_bounds.size.width, (int)view_bounds.size.height));
}
