JNI & C++ Internal Architecture

Advanced reference for C++ developers interfacing directly with FQuestWebViewJNI.

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The FQuestWebViewJNI Static Dispatcher

All Blueprint methods on UQuestWebViewComponent forward their requests to the low-level static C++ class FQuestWebViewJNI.

NDK Pixel Locking

static bool LockBitmapPixels(
    int32 InstanceId, 
    void** OutPixels, 
    int32& OutWidth, 
    int32& OutHeight, 
    int32& OutStride
);

static void UnlockBitmapPixels(int32 InstanceId);

• Uses Android NDK <android/bitmap.h> AndroidBitmap_lockPixels to acquire direct memory pointers to the hardware front buffer with zero JNI array copy overhead.

Native C++ Delegate Handlers

FQuestWebViewJNI exposes multicast delegates subscribed to by UQuestWebViewComponent:

• OnWebViewReady()
• OnTextInputFocus()
• OnPageState()
• OnJavaScriptMessage()
• OnVideoDetected()