Method captureState

src/main/java/jace/state/StateManager.java:299–346

()

    int stateCount = 0;

    public void captureState() {
        // If the state graph is invalidated it means we have to abandon all
        // previously captured states.  This helps ensure that rewinding will
        // not result in an unintended or invalid state.
        if (!isValid) {
            alphaState = null;
            if (allStateVariables != null) {
                allStateVariables.clear();
            }
            allStateVariables = null;
            // This will probably result in a lot of invalidated objects
            // so it's a good idea to suggest to the JVM to reclaim memory now.
            System.gc();

            if (Emulator.instance == null) {
                return;
            }

            // Re-examine the object structure of the emulator in case it changed
            buildStateMap();
            System.out.println(allStateVariables.size() + " variables tracked per state");
            System.out.println(objectLookup.entrySet().size() + " objects tracked in emulator model");
            isValid = true;
            stateCount = 0;
        }
        if (alphaState == null) {
            System.gc();
            alphaState = captureAlphaState();
            alphaState.tail = alphaState;
        } else {
            if (Runtime.getRuntime().freeMemory() <= freeRequired) {
                invalidate();
                return;
            }
            while (stateCount >= maxStates) {
                removeOldestState();
                stateCount--;
            }

            State newState = captureDeltaState(alphaState.tail);
//            State newState = (stateCount % 2 == 0) ? captureDeltaState(alphaState.tail) : captureAlphaState();
            alphaState.tail.addState(newState);
            alphaState.tail = newState;
        }
        // Now capture the current screen
        alphaState.tail.screenshot = getScreenshot();
        stateCount++;
    }

    private Image getScreenshot() {
        Image screen = computer.getVideo().getFrameBuffer();