Method begin

3rdparty/bgfx/src/bgfx.cpp:2269–2292

	}

	Encoder* Context::begin(bool _forThread)
	{
		EncoderImpl* encoder = &m_encoder[0];

#if BGFX_CONFIG_MULTITHREADED
		if (_forThread || BGFX_API_THREAD_MAGIC != s_threadIndex)
		{
			bx::MutexScope scopeLock(m_encoderApiLock);

			uint16_t idx = m_encoderHandle->alloc();
			if (kInvalidHandle == idx)
			{
				return NULL;
			}

			encoder = &m_encoder[idx];
			encoder->begin(m_submit, uint8_t(idx) );
		}
#else
		BX_UNUSED(_forThread);
#endif // BGFX_CONFIG_MULTITHREADED

		return reinterpret_cast<Encoder*>(encoder);
	}

	void Context::end(Encoder* _encoder)
	{