void drawRectangles(NSWindow window, Rectangle[] rects, boolean erase) {
NSRect frame = window.frame();
NSGraphicsContext context = window.graphicsContext();
NSGraphicsContext.setCurrentContext(context);
NSAffineTransform transform = NSAffineTransform.transform();
context.saveGraphicsState();
transform.scaleXBy(1, -1);
transform.translateXBy(0, -frame.height);
transform.concat();
Point parentOrigin;
if (parent != null) {
parentOrigin = display.map(parent, null, 0, 0);
} else {
parentOrigin = new Point(0, 0);
}
context.setCompositingOperation(erase ? OS.NSCompositeClear : OS.NSCompositeSourceOver);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
frame.x = rect.x + parentOrigin.x;
frame.y = rect.y + parentOrigin.y;
frame.width = rect.width;
frame.height = rect.height;
if (erase) {
frame.width++;
frame.height++;
NSBezierPath.fillRect(frame);
} else {
frame.x += 0.5f;
frame.y += 0.5f;
NSBezierPath.strokeRect(frame);
}
}
context.flushGraphics();
context.restoreGraphicsState();
}
