Method lock

android/jni/cr3java.cpp:214–238

	int (*AndroidBitmap_unlockPixels)(JNIEnv* env, jobject jbitmap);
public:
    virtual LVDrawBuf * lock(JNIEnv* env, jobject jbitmap) {
	    //CRLog::trace("JNIGraphicsLib::lock entered");
		AndroidBitmapInfo info;
		if ( ANDROID_BITMAP_RESUT_SUCCESS!=AndroidBitmap_getInfo(env, jbitmap, &info) ) {
			CRLog::error("BitmapAccessor : cannot get bitmap info");
			return NULL;
		}
		int width = info.width;
		int height = info.height;
		int stride = info.stride;
		int format = info.format;
		if ( format!=ANDROID_BITMAP_FORMAT_RGBA_8888 && format!=ANDROID_BITMAP_FORMAT_RGB_565  && format!=8 ) {
			CRLog::error("BitmapAccessor : bitmap format %d is not yet supported", format);
			return NULL;
		}
		int bpp = (format==ANDROID_BITMAP_FORMAT_RGBA_8888) ? 32 : 16;
	    //CRLog::trace("JNIGraphicsLib::lock info: %d (%d) x %d", width, stride, height);
		lUInt8 * pixels = NULL; 
		if ( ANDROID_BITMAP_RESUT_SUCCESS!=AndroidBitmap_lockPixels(env, jbitmap, (void**)&pixels) ) {
	        CRLog::error("AndroidBitmap_lockPixels failed");
		    pixels = NULL;
		}
	    //CRLog::trace("JNIGraphicsLib::lock pixels locked!" );
		return new LVColorDrawBufEx( width, height, pixels, bpp );
    } 
    virtual void unlock(JNIEnv* env, jobject jbitmap, LVDrawBuf * buf ) {
    	LVColorDrawBufEx * bmp = (LVColorDrawBufEx*)buf;
    	bmp->convert();