General :: Lock Screen With Pattern And Camera Button

Any app that has secure lock screen like with pattern or code unlock, but also has access to camera app straight from lock screen without unlocking the phone... though there would be another security needs to be applied that if the phone is used by someone else, they can use it to take pictures or videos but cannot go into gallery or review other data if the camera is activated by straight from unlock screen....and then, if one needs to access the gallery from there.. they need to draw secured pattern or key in the unlock code....