genesis-3d_engine/Engine/graphicsystem/base/RenderToTexture.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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****************************************************************************/
#include "stdneb.h"
#include "RenderToTexture.h"
#include "GraphicSystem.h"
#if __WIN32__
#include "rendersystem/d3d9/RenderDeviceD3D9.h"
#include "d3d9/TextureD3D9.h"
#include "d3d9/D3D9Types.h"
#endif

#include "addons/resource/imageoperations.h"
#include "Renderable/QuadRenderable.h"

namespace Graphic
{
	__ImplementClass(RenderToTexture,'RTGS',Core::RefCounted)
		__ImplementClass(RenderToTextureManager,'RTMG',Core::RefCounted);
	__ImplementImageSingleton(RenderToTextureManager);

	RenderToTexture::RenderToTexture()
		: m_width(1),
		m_height(1)
	{

	}

	RenderToTexture::~RenderToTexture()
	{
		Discard();
	}

	void RenderToTexture::Setup(const int& width, const int& height, const RenderBase::PixelFormat::Code& colorFormat, const uint& flag, const Math::float4& color, 
		const bool& useDepth, const float& screenRatio,
		RenderBase::AntiAliasQuality::Code quality,
		const Math::rectangle<int>& resolveRect, const bool& isBackBuffer)
	{

		GPtr<RenderBase::RenderTarget> shareDepthStencilRT = m_shareDepthStencilRT;

		// Ϊ<><CEAA><EFBFBD>޸<EFBFBD><DEB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>buffer<65><72>bug<75><67><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>m_shareDepthStencilRT<52>ı<EFBFBD><C4B1><EFBFBD>
		Discard();
		m_shareDepthStencilRT = shareDepthStencilRT;

		m_RT = RenderBase::RenderTarget::Create();
		m_RT->SetDefaultRenderTarget(isBackBuffer);
		m_RT->SetWidth(width);
		m_RT->SetHeight(height);

		if (resolveRect.right == 0 && resolveRect.left == 0 && resolveRect.top == 0 && resolveRect.bottom == 0)
		{
		}
		else
		{
			m_RT->SetResolveTextureWidth(resolveRect.width());
			m_RT->SetResolveTextureHeight(resolveRect.height());
			m_RT->SetResolveRect(resolveRect);
		}

		m_RT->SetScreenSizeRatio(screenRatio);
		m_RT->SetClearColor(color);
		m_RT->SetClearFlags(flag);
		m_RT->SetColorBufferFormat(colorFormat);
		m_RT->SetAntiAliasQuality(quality);
		if (useDepth)
		{
			if (m_shareDepthStencilRT.isvalid())
			{
				m_RT->AddSharedDepthStencilBuffer(m_shareDepthStencilRT);
			}
			else
			{
				m_RT->AddDepthStencilBuffer();
			}
		}
		m_rtHandle = GraphicSystem::Instance()->CreateRenderTarget(m_RT,m_texHandle);

		if (!m_quadRenderable.isvalid())
		{
			m_quadRenderable = QuadRenderable::Create();
		}
		else
		{
			m_quadRenderable->Discard();
		}

		m_quadRenderable->Setup(width, height);

		m_width  = width;
		m_height = height;
	}

	void RenderToTexture::ChangeSize(int width,int height)
	{
		m_RT->SetWidth(width);
		m_RT->SetHeight(height);
		GraphicSystem::Instance()->ReSizeRenderTarget(m_rtHandle,width,height);

		if (m_quadRenderable.isvalid())
		{
			m_quadRenderable->Discard();
		}
		else
		{
			m_quadRenderable = QuadRenderable::Create();
		}

		m_quadRenderable->Setup(width, height);
	}

	RenderBase::AntiAliasQuality::Code RenderToTexture::GetAntiAliasQuality() const
	{
		if (m_RT.isvalid())
		{
			return m_RT->GetAntiAliasQuality();
		}
		return RenderBase::AntiAliasQuality::None;
	}

	RenderBase::PixelFormat::Code RenderToTexture::GetColorBufferFormat() const
	{
		if (m_RT.isvalid())
		{
			return m_RT->GetColorBufferFormat();
		}
		return RenderBase::PixelFormat::InvalidPixelFormat;
	}

	void RenderToTexture::Discard()
	{
		if (m_texHandle.IsValid())
		{
			GraphicSystem::Instance()->RemoveTexture(m_texHandle);
			m_texHandle = dummyhandle;
		}

		if (m_rtHandle.IsValid())
		{
			GraphicSystem::Instance()->RemoveRenderTarget(m_rtHandle);
			m_rtHandle = dummyhandle;
		}
		m_shareDepthStencilRT = 0;
		m_RT = 0;
	}

	bool RenderToTexture::SaveTexture( const Util::String& path )
	{
#if __WIN32__
		Core::RefCounted* Ro = this->m_texHandle.AsObject();
		n_assert(Ro!=NULL);
		D3D9::TextureD3D9 * Instance = reinterpret_cast<D3D9::TextureD3D9*>(Ro);
		n_assert(Instance!=NULL);

		SizeT levelPixelSize =Instance->GetTextureSize();

		ubyte* data = new ubyte[levelPixelSize];
		n_assert(data!=NULL);
		Instance->GetTextureData(data);

		GPtr<Resources::ImageRes> textureImageRes = Resources::ImageRes::Create();
		textureImageRes->SetHeight(Instance->GetHeight());
		textureImageRes->SetWidth(Instance->GetWidth());
		textureImageRes->SetPixelFormat(Instance->GetPixelFormat());
		textureImageRes->SetDepth(1);
		textureImageRes->SetMipMapLevel(1);
		textureImageRes->SetNumFace(1);
		textureImageRes->SetImageData(data, levelPixelSize);
		return Resources::ImageOperations::SaveTGAImage(path, textureImageRes);
#endif

		return false;
	}

	void RenderToTexture::ResetQuad()
	{
		m_quadRenderable->Setup(m_width, m_height);
	}

	RenderToTextureManager::RenderToTextureManager()
	{
		__ConstructImageSingleton
	}

	RenderToTextureManager::~RenderToTextureManager()
	{
		__DestructImageSingleton
			m_RenderToTextures.Clear();
	}


}