xn65/framework/platform-dx/rendertarget.cpp

#include "xna/xna-dx.hpp"

namespace xna {
	RenderTarget2D::RenderTarget2D() : Texture2D() {
		render_impl = unew<PlatformImplementation>();
	}

	RenderTarget2D::RenderTarget2D(sptr<GraphicsDevice> const& device) : Texture2D(device) {
		render_impl = unew<PlatformImplementation>();
	}

	RenderTarget2D::~RenderTarget2D() {
		render_impl = nullptr;
	}

	bool RenderTarget2D::Initialize() {
		if (!impl || !m_device || !m_device->impl->_device) {
			Exception::Throw(Exception::UNABLE_TO_INITIALIZE);
		}		

		if (!m_device->impl->_swapChain->impl->GetBackBuffer(impl->dxTexture2D))
			return false;

		auto& dxdevice = m_device->impl->_device;
		
		const auto hr = dxdevice->CreateRenderTargetView(impl->dxTexture2D.Get(), NULL, render_impl->_renderTargetView.ReleaseAndGetAddressOf());

		if (FAILED(hr)) {
			Exception::Throw(Exception::FAILED_TO_CREATE);
		}

		return true;
	}

	bool RenderTarget2D::Apply() {
		if (!m_device || !m_device->impl->_context) {
			Exception::Throw(Exception::FAILED_TO_APPLY);
		}

		if (!render_impl->_renderTargetView)
		{
			Initialize();
		}

		auto& context = m_device->impl->_context;
		context->OMSetRenderTargets(1, render_impl->_renderTargetView.GetAddressOf(), nullptr);
		return true;
	}
}