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1 | // Created on: 2021-01-15 |
| 2 | // Copyright (c) 2021 OPEN CASCADE SAS |
| 3 | // |
| 4 | // This file is part of Open CASCADE Technology software library. |
| 5 | // |
| 6 | // This library is free software; you can redistribute it and/or modify it under |
| 7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 8 | // by the Free Software Foundation, with special exception defined in the file |
| 9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 10 | // distribution for complete text of the license and disclaimer of any warranty. |
| 11 | // |
| 12 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 13 | // commercial license or contractual agreement. |
| 14 | |
| 15 | #ifndef _OpenGl_DepthPeeling_HeaderFile |
| 16 | #define _OpenGl_DepthPeeling_HeaderFile |
| 17 | |
| 18 | #include <OpenGl_FrameBuffer.hxx> |
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19 | #include <OpenGl_NamedResource.hxx> |
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20 | |
| 21 | //! Class provides FBOs for dual depth peeling. |
| 22 | class OpenGl_DepthPeeling : public OpenGl_NamedResource |
| 23 | { |
| 24 | DEFINE_STANDARD_RTTIEXT(OpenGl_DepthPeeling, OpenGl_NamedResource) |
| 25 | public: |
| 26 | |
| 27 | //! Constructor. |
| 28 | Standard_EXPORT OpenGl_DepthPeeling(); |
| 29 | |
| 30 | //! Destructor. |
| 31 | Standard_EXPORT virtual ~OpenGl_DepthPeeling(); |
| 32 | |
| 33 | //! Release OpenGL resources |
| 34 | Standard_EXPORT virtual void Release (OpenGl_Context* theGlCtx) Standard_OVERRIDE; |
| 35 | |
| 36 | //! Returns estimated GPU memory usage for holding data without considering overheads and allocation alignment rules. |
| 37 | Standard_EXPORT virtual Standard_Size EstimatedDataSize() const Standard_OVERRIDE; |
| 38 | |
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39 | //! Attach a texture image. |
| 40 | //! Resets the active FBO to 0. |
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41 | Standard_EXPORT void AttachDepthTexture (const Handle(OpenGl_Context)& theCtx, |
| 42 | const Handle(OpenGl_Texture)& theDepthStencilTexture); |
| 43 | |
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44 | //! Detach a texture image. |
| 45 | //! Resets the active FBO to 0. |
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46 | Standard_EXPORT void DetachDepthTexture (const Handle(OpenGl_Context)& theCtx); |
| 47 | |
| 48 | //! Returns additional buffers for ping-pong |
| 49 | const Handle(OpenGl_FrameBuffer)* DepthPeelFbosOit() const { return myDepthPeelFbosOit; } |
| 50 | |
| 51 | //! Returns additional buffers for ping-pong |
| 52 | const Handle(OpenGl_FrameBuffer)* FrontBackColorFbosOit() const { return myFrontBackColorFbosOit; } |
| 53 | |
| 54 | //! Returns additional FBO for depth peeling |
| 55 | const Handle(OpenGl_FrameBuffer)& BlendBackFboOit() const { return myBlendBackFboOit; } |
| 56 | |
| 57 | private: |
| 58 | |
| 59 | Handle(OpenGl_FrameBuffer) myDepthPeelFbosOit[2]; //!< depth + front color + back color |
| 60 | Handle(OpenGl_FrameBuffer) myFrontBackColorFbosOit[2]; //!< front color + back color |
| 61 | Handle(OpenGl_FrameBuffer) myBlendBackFboOit; |
| 62 | |
| 63 | }; |
| 64 | |
| 65 | #endif // _OpenGl_DepthPeeling_HeaderFile |
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