Method renderToTarget

MyGUIEngine/src/MyGUI_RenderItem.cpp:29–85

	}

	void RenderItem::renderToTarget(IRenderTarget* _target, bool _update)
	{
		if (mTexture == nullptr)
			return;

		mRenderTarget = _target;

		mCurrentUpdate = _update;

		if (mOutOfDate || _update)
		{
			mCountVertex = 0;
			Vertex* buffer = mVertexBuffer->lock();
			if (buffer != nullptr)
			{
				for (auto& item : mDrawItems)
				{
					mCurrentVertex = buffer;
					mLastVertexCount = 0;

					item.first->doRender();

					MYGUI_DEBUG_ASSERT(mLastVertexCount <= item.second, "It is too much vertexes");
					buffer += mLastVertexCount;
					mCountVertex += mLastVertexCount;
				}

				mVertexBuffer->unlock();
			}

			mOutOfDate = false;
		}

		// хоть с 0 не выводиться батч, но все равно не будем дергать стейт и операцию
		if (0 != mCountVertex)
		{
#if MYGUI_DEBUG_MODE == 1
			if (!RenderManager::getInstance().checkTexture(mTexture))
			{
				auto textureName = mTexture->getName();
				mTexture = nullptr;
				MYGUI_EXCEPT("texture pointer is not valid, texture name '" << textureName << "'");
				return;
			}
#endif
			// непосредственный рендринг
			if (mManualRender)
			{
				for (auto& item : mDrawItems)
					item.first->doManualRender(mVertexBuffer, mTexture, mCountVertex);
			}
			else
			{
				_target->doRender(mVertexBuffer, mTexture, mCountVertex);
			}
		}
	}