Shader: Implement geometry shader support.

Author: CrossVR

src/Layers/xrRender/R_Backend.h

@@ -173,7 +173,7 @@ class  ECORE_API CBackend
 	CTexture*						textures_ps	[CTexture::mtMaxPixelShaderTextures];	// stages
 	//CTexture*						textures_vs	[5	];	// dmap + 4 vs
 	CTexture*						textures_vs	[CTexture::mtMaxVertexShaderTextures];	// 4 vs
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	CTexture*						textures_gs	[CTexture::mtMaxGeometryShaderTextures];	// 4 vs
 #	ifdef USE_DX11
 	CTexture*						textures_hs	[CTexture::mtMaxHullShaderTextures];	// 4 vs
@@ -295,8 +295,12 @@ class  ECORE_API CBackend
 #endif // USE_OGL
 	ICF void						set_PS				(ref_ps& _ps)						{ set_PS(_ps->ps,_ps->cName.c_str());				}
 
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
+#ifdef USE_OGL
+	ICF void						set_GS				(GLuint _gs, LPCSTR _n=0);
+#else
 	ICF void						set_GS				(ID3DGeometryShader* _gs, LPCSTR _n=0);
+#endif // USE_OGL
 	ICF void						set_GS				(ref_gs& _gs)						{ set_GS(_gs->gs,_gs->cName.c_str());				}
 
 #	ifdef USE_DX11

src/Layers/xrRender/ResourceManager.h

@@ -35,7 +35,7 @@ class ECORE_API CResourceManager
 	DEFINE_MAP_PRED(const char*,CRT*,			map_RT,			map_RTIt,			str_pred);
 	//	DX10 cut DEFINE_MAP_PRED(const char*,CRTC*,			map_RTC,		map_RTCIt,			str_pred);
 	DEFINE_MAP_PRED(const char*,SVS*,			map_VS,			map_VSIt,			str_pred);
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	DEFINE_MAP_PRED(const char*,SGS*,			map_GS,			map_GSIt,			str_pred);
 #endif	//	USE_DX10
 #ifdef USE_DX11
@@ -56,7 +56,7 @@ class ECORE_API CResourceManager
 	//	DX10 cut map_RTC												m_rtargets_c;
 	map_VS												m_vs;
 	map_PS												m_ps;
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	map_GS												m_gs;
 #endif	//	USE_DX10
 	map_TD												m_td;
@@ -145,7 +145,7 @@ class ECORE_API CResourceManager
 
 	//	DX10 cut CRTC*							_CreateRTC			(LPCSTR Name, u32 size,	D3DFORMAT f);
 	//	DX10 cut void							_DeleteRTC			(const CRTC*	RT	);
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	SGS*							_CreateGS			(LPCSTR Name);
 	void							_DeleteGS			(const SGS*	GS	);
 #endif	//	USE_DX10
@@ -174,6 +174,9 @@ class ECORE_API CResourceManager
 	SState*							_CreateState		(SimulatorStates& Code);
 	void							_DeleteState		(const SState* SB);
 
+#ifdef USE_OGL
+	SDeclaration*					_CreateDecl			(u32 FVF);
+#endif // USE_OGL
 	SDeclaration*					_CreateDecl			(D3DVERTEXELEMENT9* dcl);
 	void							_DeleteDecl			(const SDeclaration* dcl);
 

src/Layers/xrRender/SH_Atomic.cpp

@@ -48,12 +48,16 @@ SPS::~SPS()
     RImplementation.Resources->_DeletePS(this);
 }
 
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 ///////////////////////////////////////////////////////////////////////
 //	SGS
 SGS::~SGS								()
 {
-    _RELEASE(gs);
+#ifdef USE_OGL
+	CHK_GL(glDeleteProgram(gs));
+#else
+	_RELEASE(gs);
+#endif // USE_OGL
     RImplementation.Resources->_DeleteGS(this);
 }
 
@@ -74,7 +78,9 @@ SCS::~SCS								()
     RImplementation.Resources->_DeleteCS(this);
 }
 #	endif
+#endif	//	USE_DX10
 
+#if defined(USE_DX10) || defined(USE_DX11)
 ///////////////////////////////////////////////////////////////////////
 //	SInputSignature
 SInputSignature::SInputSignature(ID3DBlob* pBlob)	{ VERIFY(pBlob); signature=pBlob; signature->AddRef();};

src/Layers/xrRender/SH_Atomic.h

@@ -54,11 +54,15 @@ struct ECORE_API SPS : public xr_resource_named
 };
 typedef	resptr_core<SPS,resptr_base<SPS> > ref_ps;
 
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 //////////////////////////////////////////////////////////////////////////
 struct ECORE_API SGS : public xr_resource_named
 {
+#ifdef USE_OGL
+	GLuint								gs;
+#else
 	ID3DGeometryShader*					gs;
+#endif // USE_OGL
 	R_constant_table					constants;
 	~SGS			();
 };

src/Layers/xrRender/SH_Texture.h

@@ -10,7 +10,7 @@ class  CTheoraSurface;
 class  ECORE_API CTexture : public xr_resource_named
 {
 public:
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	enum	MaxTextures
 	{
 		//	Actually these values are 128

src/Layers/xrRender/Shader.cpp

@@ -59,7 +59,7 @@ BOOL SPass::equal(const SPass& other)
 	if (state		!= other.state)		return FALSE;
 	if (ps			!= other.ps)			return FALSE;
 	if (vs			!= other.vs)			return FALSE;
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	if (gs			!= other.gs)			return FALSE;
 #	ifdef USE_DX11
 	if (hs			!= other.hs)			return FALSE;

src/Layers/xrRender/Shader.h

@@ -89,7 +89,7 @@ struct	  ECORE_API		SPass			: public xr_resource_flagged									{
 	ref_state							state;		// Generic state, like Z-Buffering, samplers, etc
 	ref_ps								ps;			// may be NULL = FFP, in that case "state" must contain TSS setup
 	ref_vs								vs;			// may be NULL = FFP, in that case "state" must contain RS setup, *and* FVF-compatible declaration must be used
-#if defined(USE_DX10) || defined(USE_DX11)
+#if defined(USE_DX10) || defined(USE_DX11) || defined(USE_OGL)
 	ref_gs								gs;			// may be NULL = don't use geometry shader at all
 #	ifdef USE_DX11
 	ref_hs								hs;			// may be NULL = don't use hull shader at all