src/OpenGl/OpenGl_View.hxx

   1 // Created on: 2011-09-20
   2 // Created by: Sergey ZERCHANINOV
   3 // Copyright (c) 2011-2014 OPEN CASCADE SAS
   4 //
   5 // This file is part of Open CASCADE Technology software library.
   6 //
   7 // This library is free software; you can redistribute it and/or modify it under
   8 // the terms of the GNU Lesser General Public License version 2.1 as published
   9 // by the Free Software Foundation, with special exception defined in the file
  10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
  11 // distribution for complete text of the license and disclaimer of any warranty.
  12 //
  13 // Alternatively, this file may be used under the terms of Open CASCADE
  14 // commercial license or contractual agreement.
  15
  16 #ifndef _OpenGl_View_Header
  17 #define _OpenGl_View_Header
  18
  19 #include <MMgt_TShared.hxx>
  20 #include <Standard_Type.hxx>
  21
  22 #include <TColStd_Array2OfReal.hxx>
  23 #include <NCollection_List.hxx>
  24 #include <math_BullardGenerator.hxx>
  25
  26 #include <Quantity_NameOfColor.hxx>
  27 #include <Aspect_FillMethod.hxx>
  28 #include <Aspect_GradientFillMethod.hxx>
  29
  30 #include <Graphic3d_CView.hxx>
  31 #include <Graphic3d_GraduatedTrihedron.hxx>
  32 #include <Graphic3d_SequenceOfHClipPlane.hxx>
  33 #include <Graphic3d_TypeOfShadingModel.hxx>
  34 #include <Graphic3d_WorldViewProjState.hxx>
  35 #include <Graphic3d_ZLayerSettings.hxx>
  36
  37 #include <OpenGl_AspectFace.hxx>
  38 #include <OpenGl_BackgroundArray.hxx>
  39 #include <OpenGl_BVHTreeSelector.hxx>
  40 #include <OpenGl_Context.hxx>
  41 #include <OpenGl_FrameBuffer.hxx>
  42 #include <OpenGl_GraduatedTrihedron.hxx>
  43 #include <OpenGl_LayerList.hxx>
  44 #include <OpenGl_Light.hxx>
  45 #include <OpenGl_LineAttributes.hxx>
  46 #include <OpenGl_SceneGeometry.hxx>
  47 #include <OpenGl_Structure.hxx>
  48 #include <OpenGl_Window.hxx>
  49 #include <OpenGl_Workspace.hxx>
  50 #include <OpenGl_TileSampler.hxx>
  51
  52 #include <map>
  53 #include <set>
  54
  55 struct OpenGl_Matrix;
  56
  57 class Graphic3d_StructureManager;
  58 class OpenGl_GraphicDriver;
  59 class OpenGl_StateCounter;
  60 class OpenGl_RaytraceMaterial;
  61 class OpenGl_TriangleSet;
  62 class OpenGl_Workspace;
  63 class OpenGl_View;
  64 DEFINE_STANDARD_HANDLE(OpenGl_View,Graphic3d_CView)
  65
  66 //! Implementation of OpenGl view.
  67 class OpenGl_View : public Graphic3d_CView
  68 {
  69
  70 public:
  71
  72   //! Constructor.
  73   Standard_EXPORT OpenGl_View (const Handle(Graphic3d_StructureManager)& theMgr,
  74                                const Handle(OpenGl_GraphicDriver)& theDriver,
  75                                const Handle(OpenGl_Caps)& theCaps,
  76                                Standard_Boolean& theDeviceLostFlag,
  77                                OpenGl_StateCounter* theCounter);
  78
  79   //! Default destructor.
  80   Standard_EXPORT virtual ~OpenGl_View();
  81
  82   Standard_EXPORT void ReleaseGlResources (const Handle(OpenGl_Context)& theCtx);
  83
  84   //! Deletes and erases the view.
  85   Standard_EXPORT virtual void Remove() Standard_OVERRIDE;
  86
  87   //! @param theDrawToFrontBuffer Advanced option to modify rendering mode:
  88   //! 1. TRUE.  Drawing immediate mode structures directly to the front buffer over the scene image.
  89   //! Fast, so preferred for interactive work (used by default).
  90   //! However these extra drawings will be missed in image dump since it is performed from back buffer.
  91   //! Notice that since no pre-buffering used the V-Sync will be ignored and rendering could be seen
  92   //! in run-time (in case of slow hardware) and/or tearing may appear.
  93   //! So this is strongly recommended to draw only simple (fast) structures.
  94   //! 2. FALSE. Drawing immediate mode structures to the back buffer.
  95   //! The complete scene is redrawn first, so this mode is slower if scene contains complex data and/or V-Sync
  96   //! is turned on. But it works in any case and is especially useful for view dump because the dump image is read
  97   //! from the back buffer.
  98   //! @return previous mode.
  99   Standard_EXPORT Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer) Standard_OVERRIDE;
 100
 101   //! Creates and maps rendering window to the view.
 102   //! @param theWindow [in] the window.
 103   //! @param theContext [in] the rendering context. If NULL the context will be created internally.
 104   Standard_EXPORT virtual void SetWindow (const Handle(Aspect_Window)&  theWindow,
 105                                           const Aspect_RenderingContext theContext) Standard_OVERRIDE;
 106
 107   //! Returns window associated with the view.
 108   virtual Handle(Aspect_Window) Window() const Standard_OVERRIDE
 109   { return myWindow->PlatformWindow(); }
 110
 111   //! Returns True if the window associated to the view is defined.
 112   virtual Standard_Boolean IsDefined() const Standard_OVERRIDE
 113   { return !myWindow.IsNull(); }
 114
 115   //! Handle changing size of the rendering window.
 116   Standard_EXPORT virtual void Resized() Standard_OVERRIDE;
 117
 118   //! Redraw content of the view.
 119   Standard_EXPORT virtual void Redraw() Standard_OVERRIDE;
 120
 121   //! Redraw immediate content of the view.
 122   Standard_EXPORT virtual void RedrawImmediate() Standard_OVERRIDE;
 123
 124   //! Marks BVH tree for given priority list as dirty and marks primitive set for rebuild.
 125   Standard_EXPORT virtual void Invalidate() Standard_OVERRIDE;
 126
 127   //! Return true if view content cache has been invalidated.
 128   virtual Standard_Boolean IsInvalidated() Standard_OVERRIDE { return !myBackBufferRestored; }
 129
 130   //! Returns data of a graduated trihedron
 131   const Graphic3d_GraduatedTrihedron& GetGraduatedTrihedron() Standard_OVERRIDE
 132   { return myGTrihedronData; }
 133
 134   //! Displays Graduated Trihedron.
 135   Standard_EXPORT virtual void GraduatedTrihedronDisplay (const Graphic3d_GraduatedTrihedron& theTrihedronData) Standard_OVERRIDE;
 136
 137   //! Erases Graduated Trihedron.
 138   Standard_EXPORT virtual void GraduatedTrihedronErase() Standard_OVERRIDE;
 139
 140   //! Sets minimum and maximum points of scene bounding box for Graduated Trihedron stored in graphic view object.
 141   //! @param theMin [in] the minimum point of scene.
 142   //! @param theMax [in] the maximum point of scene.
 143   Standard_EXPORT virtual void GraduatedTrihedronMinMaxValues (const Graphic3d_Vec3 theMin, const Graphic3d_Vec3 theMax) Standard_OVERRIDE;
 144
 145   //! Dump active rendering buffer into specified memory buffer.
 146   Standard_EXPORT virtual Standard_Boolean BufferDump (Image_PixMap& theImage,
 147                                                        const Graphic3d_BufferType& theBufferType) Standard_OVERRIDE;
 148
 149   //! Export scene into the one of the Vector graphics formats (SVG, PS, PDF...).
 150   //! In contrast to Bitmaps, Vector graphics is scalable (so you may got quality benefits
 151   //! on printing to laser printer). Notice however that results may differ a lot and
 152   //! do not contain some elements.
 153   Standard_EXPORT virtual Standard_Boolean Export (const Standard_CString theFileName,
 154                                                    const Graphic3d_ExportFormat theFormat,
 155                                                    const Graphic3d_SortType theSortType = Graphic3d_ST_BSP_Tree) Standard_OVERRIDE;
 156
 157   //! Marks BVH tree and the set of BVH primitives of correspondent priority list with id theLayerId as outdated.
 158   Standard_EXPORT virtual void InvalidateBVHData (const Standard_Integer theLayerId) Standard_OVERRIDE;
 159
 160   //! Insert a new top-level z layer with the given ID.
 161   Standard_EXPORT virtual void AddZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 162
 163   //! Remove a z layer with the given ID.
 164   Standard_EXPORT virtual void RemoveZLayer (const Graphic3d_ZLayerId theLayerId) Standard_OVERRIDE;
 165
 166   //! Sets the settings for a single Z layer of specified view.
 167   Standard_EXPORT virtual void SetZLayerSettings (const Graphic3d_ZLayerId theLayerId,
 168                                                   const Graphic3d_ZLayerSettings& theSettings) Standard_OVERRIDE;
 169
 170   //! Returns the maximum Z layer ID.
 171   //! First layer ID is Graphic3d_ZLayerId_Default, last ID is ZLayerMax().
 172   Standard_EXPORT virtual Standard_Integer ZLayerMax() const Standard_OVERRIDE;
 173
 174   //! Returns the bounding box of all structures displayed in the Z layer.
 175   //! Never fails. If Z layer does not exist nothing happens.
 176   Standard_EXPORT virtual void InvalidateZLayerBoundingBox (const Graphic3d_ZLayerId theLayerId) const Standard_OVERRIDE;
 177
 178   //! Returns the bounding box of all structures displayed in the Z layer.
 179   //! If Z layer does not exist the empty box is returned.
 180   //! @param theLayerId            layer identifier
 181   //! @param theCamera             camera definition
 182   //! @param theWindowWidth        viewport width  (for applying transformation-persistence)
 183   //! @param theWindowHeight       viewport height (for applying transformation-persistence)
 184   //! @param theToIncludeAuxiliary consider also auxiliary presentations (with infinite flag or with trihedron transformation persistence)
 185   //! @return computed bounding box
 186   Standard_EXPORT virtual Bnd_Box ZLayerBoundingBox (const Graphic3d_ZLayerId        theLayerId,
 187                                                      const Handle(Graphic3d_Camera)& theCamera,
 188                                                      const Standard_Integer          theWindowWidth,
 189                                                      const Standard_Integer          theWindowHeight,
 190                                                      const Standard_Boolean          theToIncludeAuxiliary) const Standard_OVERRIDE;
 191
 192   //! Returns pointer to an assigned framebuffer object.
 193   Standard_EXPORT virtual Handle(Standard_Transient) FBO() const Standard_OVERRIDE;
 194
 195   //! Sets framebuffer object for offscreen rendering.
 196   Standard_EXPORT virtual void SetFBO (const Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 197
 198   //! Generate offscreen FBO in the graphic library.
 199   //! If not supported on hardware returns NULL.
 200   Standard_EXPORT virtual Handle(Standard_Transient) FBOCreate (const Standard_Integer theWidth,
 201                                                                 const Standard_Integer theHeight) Standard_OVERRIDE;
 202
 203   //! Remove offscreen FBO from the graphic library
 204   Standard_EXPORT virtual void FBORelease (Handle(Standard_Transient)& theFbo) Standard_OVERRIDE;
 205
 206   //! Read offscreen FBO configuration.
 207   Standard_EXPORT virtual void FBOGetDimensions (const Handle(Standard_Transient)& theFbo,
 208                                                  Standard_Integer& theWidth,
 209                                                  Standard_Integer& theHeight,
 210                                                  Standard_Integer& theWidthMax,
 211                                                  Standard_Integer& theHeightMax) Standard_OVERRIDE;
 212
 213   //! Change offscreen FBO viewport.
 214   Standard_EXPORT virtual void FBOChangeViewport (const Handle(Standard_Transient)& theFbo,
 215                                                   const Standard_Integer theWidth,
 216                                                   const Standard_Integer theHeight) Standard_OVERRIDE;
 217
 218 public:
 219
 220   //! Returns background  fill color.
 221   Standard_EXPORT virtual Aspect_Background Background() const Standard_OVERRIDE;
 222
 223   //! Sets background fill color.
 224   Standard_EXPORT virtual void SetBackground (const Aspect_Background& theBackground) Standard_OVERRIDE;
 225
 226   //! Returns gradient background fill colors.
 227   Standard_EXPORT virtual Aspect_GradientBackground GradientBackground() const Standard_OVERRIDE;
 228
 229   //! Sets gradient background fill colors.
 230   Standard_EXPORT virtual void SetGradientBackground (const Aspect_GradientBackground& theBackground) Standard_OVERRIDE;
 231
 232   //! Returns background image texture file path.
 233   Standard_EXPORT virtual TCollection_AsciiString BackgroundImage() Standard_OVERRIDE { return myBackgroundImagePath; }
 234
 235   //! Sets background image texture file path.
 236   Standard_EXPORT virtual void SetBackgroundImage (const TCollection_AsciiString& theFilePath) Standard_OVERRIDE;
 237
 238   //! Returns background image fill style.
 239   Standard_EXPORT virtual Aspect_FillMethod BackgroundImageStyle() const Standard_OVERRIDE;
 240
 241   //! Sets background image fill style.
 242   Standard_EXPORT virtual void SetBackgroundImageStyle (const Aspect_FillMethod theFillStyle) Standard_OVERRIDE;
 243
 244   //! Returns environment texture set for the view.
 245   Standard_EXPORT virtual Handle(Graphic3d_TextureEnv) TextureEnv() const Standard_OVERRIDE { return myTextureEnvData; }
 246
 247   //! Sets environment texture for the view.
 248   Standard_EXPORT virtual void SetTextureEnv (const Handle(Graphic3d_TextureEnv)& theTextureEnv) Standard_OVERRIDE;
 249
 250   //! Returns the state of frustum culling optimization.
 251   virtual Standard_Boolean IsCullingEnabled() const Standard_OVERRIDE { return myCulling; }
 252
 253   //! Enables or disables frustum culling optimization.
 254   virtual void SetCullingEnabled (const Standard_Boolean theIsEnabled) Standard_OVERRIDE { myCulling = theIsEnabled; }
 255
 256   //! Returns shading model of the view.
 257   virtual Graphic3d_TypeOfShadingModel ShadingModel() const Standard_OVERRIDE { return myShadingModel; }
 258
 259   //! Sets shading model of the view.
 260   virtual void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel) Standard_OVERRIDE { myShadingModel = theModel; }
 261
 262   //! Return backfacing model used for the view.
 263   virtual Graphic3d_TypeOfBackfacingModel BackfacingModel() const Standard_OVERRIDE { return myBackfacing; }
 264
 265   //! Sets backfacing model for the view.
 266   virtual void SetBackfacingModel (const Graphic3d_TypeOfBackfacingModel theModel) Standard_OVERRIDE { myBackfacing = theModel; }
 267
 268   //! Returns camera object of the view.
 269   virtual const Handle(Graphic3d_Camera)& Camera() const Standard_OVERRIDE { return myCamera; }
 270
 271   //! Returns local camera origin currently set for rendering, might be modified during rendering.
 272   const gp_XYZ& LocalOrigin() const { return myLocalOrigin; }
 273
 274   //! Setup local camera origin currently set for rendering.
 275   Standard_EXPORT void SetLocalOrigin (const gp_XYZ& theOrigin);
 276
 277   //! Sets camera used by the view.
 278   Standard_EXPORT virtual void SetCamera (const Handle(Graphic3d_Camera)& theCamera) Standard_OVERRIDE;
 279
 280   //! Returns list of lights of the view.
 281   virtual const Graphic3d_ListOfCLight& Lights() const Standard_OVERRIDE { return myLights; }
 282
 283   //! Sets list of lights for the view.
 284   virtual void SetLights (const Graphic3d_ListOfCLight& theLights) Standard_OVERRIDE
 285   {
 286     myLights = theLights;
 287     myCurrLightSourceState = myStateCounter->Increment();
 288   }
 289
 290   //! Returns list of clip planes set for the view.
 291   virtual const Handle(Graphic3d_SequenceOfHClipPlane)& ClipPlanes() const Standard_OVERRIDE { return myClipPlanes; }
 292
 293   //! Sets list of clip planes for the view.
 294   virtual void SetClipPlanes (const Handle(Graphic3d_SequenceOfHClipPlane)& thePlanes) Standard_OVERRIDE { myClipPlanes = thePlanes; }
 295
 296   //! Fill in the dictionary with diagnostic info.
 297   //! Should be called within rendering thread.
 298   //!
 299   //! This API should be used only for user output or for creating automated reports.
 300   //! The format of returned information (e.g. key-value layout)
 301   //! is NOT part of this API and can be changed at any time.
 302   //! Thus application should not parse returned information to weed out specific parameters.
 303   Standard_EXPORT virtual void DiagnosticInformation (TColStd_IndexedDataMapOfStringString& theDict,
 304                                                       Graphic3d_DiagnosticInfo theFlags) const Standard_OVERRIDE;
 305
 306 public:
 307
 308   //! Returns background color.
 309   const Quantity_ColorRGBA& BackgroundColor() const { return myBgColor; }
 310
 311   //! Change graduated trihedron.
 312   OpenGl_GraduatedTrihedron& ChangeGraduatedTrihedron() { return myGraduatedTrihedron; }
 313
 314   void SetTextureEnv (const Handle(OpenGl_Context)&       theCtx,
 315                       const Handle(Graphic3d_TextureEnv)& theTexture);
 316
 317   void SetBackgroundTextureStyle (const Aspect_FillMethod FillStyle);
 318
 319   void SetBackgroundGradient (const Quantity_Color& AColor1, const Quantity_Color& AColor2, const Aspect_GradientFillMethod AType);
 320
 321   void SetBackgroundGradientType (const Aspect_GradientFillMethod AType);
 322
 323   //! Returns list of OpenGL Z-layers.
 324   const OpenGl_LayerList& LayerList() const { return myZLayers; }
 325
 326   //! Returns list of openGL light sources.
 327   const OpenGl_ListOfLight& LightList() const { return myLights; }
 328
 329   //! Returns OpenGL window implementation.
 330   const Handle(OpenGl_Window) GlWindow() const { return myWindow; }
 331
 332   //! Returns OpenGL environment map.
 333   const Handle(OpenGl_Texture)& GlTextureEnv() const { return myTextureEnv; }
 334
 335   //! Returns selector for BVH tree, providing a possibility to store information
 336   //! about current view volume and to detect which objects are overlapping it.
 337   OpenGl_BVHTreeSelector& BVHTreeSelector() { return myBVHSelector; }
 338
 339   //! Returns true if there are immediate structures to display
 340   bool HasImmediateStructures() const
 341   {
 342     return myZLayers.NbImmediateStructures() != 0;
 343   }
 344
 345 protected: //! @name Internal methods for managing GL resources
 346
 347   //! Initializes OpenGl resource for environment texture.
 348   void initTextureEnv (const Handle(OpenGl_Context)& theContext);
 349
 350 protected: //! @name low-level redrawing sub-routines
 351
 352   //! Redraws view for the given monographic camera projection, or left/right eye.
 353   Standard_EXPORT virtual void redraw (const Graphic3d_Camera::Projection theProjection,
 354                                        OpenGl_FrameBuffer*                theReadDrawFbo);
 355
 356   //! Redraws view for the given monographic camera projection, or left/right eye.
 357   //!
 358   //! Method will blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
 359   //! into presentation buffer (myMainSceneFbos -> offscreen FBO or
 360   //! myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
 361   //! and redraw immediate structures on top.
 362   //!
 363   //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
 364   //! the first step (blitting) will be skipped.
 365   //!
 366   //! @return false if immediate structures has been rendered directly into FrontBuffer
 367   //! and Buffer Swap should not be called.
 368   Standard_EXPORT virtual bool redrawImmediate (const Graphic3d_Camera::Projection theProjection,
 369                                                 OpenGl_FrameBuffer* theReadFbo,
 370                                                 OpenGl_FrameBuffer* theDrawFbo,
 371                                                 const Standard_Boolean theIsPartialUpdate = Standard_False);
 372
 373   //! Blit image from/to specified buffers.
 374   Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer*    theReadFbo,
 375                                     OpenGl_FrameBuffer*    theDrawFbo,
 376                                     const Standard_Boolean theToFlip = Standard_False);
 377
 378   //! Setup default FBO.
 379   Standard_EXPORT void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
 380
 381 protected: //! @name Rendering of GL graphics (with prepared drawing buffer).
 382
 383   //! Renders the graphical contents of the view into the preprepared window or framebuffer.
 384   //! @param theProjection [in] the projection that should be used for rendering.
 385   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 386   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 387   Standard_EXPORT virtual void render (Graphic3d_Camera::Projection theProjection,
 388                                        OpenGl_FrameBuffer*          theReadDrawFbo,
 389                                        const Standard_Boolean       theToDrawImmediate);
 390
 391   //! Renders the graphical scene.
 392   //! @param theProjection [in] the projection that is used for rendering.
 393   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 394   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 395   Standard_EXPORT virtual void renderScene (Graphic3d_Camera::Projection theProjection,
 396                                             OpenGl_FrameBuffer*    theReadDrawFbo,
 397                                             const Standard_Boolean theToDrawImmediate);
 398
 399   //! Draw background (gradient / image)
 400   Standard_EXPORT virtual void drawBackground (const Handle(OpenGl_Workspace)& theWorkspace);
 401
 402   //! Render set of structures presented in the view.
 403   //! @param theProjection [in] the projection that is used for rendering.
 404   //! @param theReadDrawFbo [in] the framebuffer for rendering graphics.
 405   //! @param theToDrawImmediate [in] the flag indicates whether the rendering performs in immediate mode.
 406   Standard_EXPORT virtual void renderStructs (Graphic3d_Camera::Projection theProjection,
 407                                               OpenGl_FrameBuffer*    theReadDrawFbo,
 408                                               const Standard_Boolean theToDrawImmediate);
 409
 410   //! Renders trihedron.
 411   void renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace);
 412
 413 private:
 414
 415   //! Adds the structure to display lists of the view.
 416   Standard_EXPORT virtual void displayStructure (const Handle(Graphic3d_CStructure)& theStructure,
 417                                                  const Standard_Integer thePriority) Standard_OVERRIDE;
 418
 419   //! Erases the structure from display lists of the view.
 420   Standard_EXPORT virtual void eraseStructure (const Handle(Graphic3d_CStructure)& theStructure) Standard_OVERRIDE;
 421
 422   //! Change Z layer of a structure already presented in view.
 423   Standard_EXPORT virtual void changeZLayer (const Handle(Graphic3d_CStructure)& theCStructure,
 424                                              const Graphic3d_ZLayerId theNewLayerId) Standard_OVERRIDE;
 425
 426   //! Changes the priority of a structure within its Z layer in the specified view.
 427   Standard_EXPORT virtual void changePriority (const Handle(Graphic3d_CStructure)& theCStructure,
 428                                                const Standard_Integer theNewPriority) Standard_OVERRIDE;
 429
 430   //! Returns zoom-scale factor.
 431   Standard_EXPORT virtual Standard_Real considerZoomPersistenceObjects (const Graphic3d_ZLayerId        theLayerId,
 432                                                                         const Handle(Graphic3d_Camera)& theCamera,
 433                                                                         const Standard_Integer          theWindowWidth,
 434                                                                         const Standard_Integer          theWindowHeight) const Standard_OVERRIDE;
 435
 436 private:
 437
 438   //! Copy content of Back buffer to the Front buffer.
 439   void copyBackToFront();
 440
 441   //! Initialize blit quad.
 442   OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
 443
 444   //! Blend together views pair into stereo image.
 445   void drawStereoPair (OpenGl_FrameBuffer* theDrawFbo);
 446
 447 protected:
 448
 449   OpenGl_GraphicDriver*    myDriver;
 450   Handle(OpenGl_Window)    myWindow;
 451   Handle(OpenGl_Workspace) myWorkspace;
 452   Handle(OpenGl_Caps)      myCaps;
 453   Standard_Boolean&        myDeviceLostFlag;
 454   Standard_Boolean         myWasRedrawnGL;
 455
 456   Standard_Boolean                myCulling;
 457   Graphic3d_TypeOfShadingModel    myShadingModel;
 458   Graphic3d_TypeOfBackfacingModel myBackfacing;
 459   Quantity_ColorRGBA              myBgColor;
 460   Handle(Graphic3d_SequenceOfHClipPlane) myClipPlanes;
 461   Handle(Graphic3d_Camera)        myCamera;
 462   gp_XYZ                          myLocalOrigin;
 463   Handle(OpenGl_FrameBuffer)      myFBO;
 464   Standard_Boolean                myToShowGradTrihedron;
 465   TCollection_AsciiString         myBackgroundImagePath;
 466   Handle(Graphic3d_TextureEnv)    myTextureEnvData;
 467   Graphic3d_GraduatedTrihedron    myGTrihedronData;
 468
 469   OpenGl_ListOfLight              myNoShadingLight;
 470   OpenGl_ListOfLight              myLights;
 471   OpenGl_LayerList                myZLayers; //!< main list of displayed structure, sorted by layers
 472
 473   Graphic3d_WorldViewProjState    myWorldViewProjState; //!< camera modification state
 474   OpenGl_StateCounter*            myStateCounter;
 475   Standard_Size                   myCurrLightSourceState;
 476
 477   typedef std::pair<Standard_Size, Standard_Size> StateInfo;
 478
 479   StateInfo myLastOrientationState;
 480   StateInfo myLastViewMappingState;
 481   StateInfo myLastLightSourceState;
 482
 483   //! Is needed for selection of overlapping objects and storage of the current view volume
 484   OpenGl_BVHTreeSelector myBVHSelector;
 485
 486   OpenGl_GraduatedTrihedron myGraduatedTrihedron;
 487
 488   Handle(OpenGl_Texture) myTextureEnv;
 489
 490   //! Framebuffers for OpenGL output.
 491   Handle(OpenGl_FrameBuffer) myOpenGlFBO;
 492   Handle(OpenGl_FrameBuffer) myOpenGlFBO2;
 493
 494 protected: //! @name Rendering properties
 495
 496   //! Two framebuffers (left and right views) store cached main presentation
 497   //! of the view (without presentation of immediate layers).
 498   GLint                      myFboColorFormat;        //!< sized format for color attachments
 499   GLint                      myFboDepthFormat;        //!< sized format for depth-stencil attachments
 500   Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
 501   Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2]; //!< Additional buffers for immediate layer in stereo mode.
 502   OpenGl_VertexBuffer        myFullScreenQuad;        //!< Vertices for full-screen quad rendering.
 503   OpenGl_VertexBuffer        myFullScreenQuadFlip;
 504   Standard_Boolean           myToFlipOutput;          //!< Flag to draw result image upside-down
 505   unsigned int               myFrameCounter;          //!< redraw counter, for debugging
 506   Standard_Boolean           myHasFboBlit;            //!< disable FBOs on failure
 507   Standard_Boolean           myToDisableMSAA;         //!< disable MSAA after failure
 508   Standard_Boolean           myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
 509   Standard_Boolean           myBackBufferRestored;
 510   Standard_Boolean           myIsImmediateDrawn;     //!< flag indicates that immediate mode buffer contains some data
 511
 512 protected: //! @name Background parameters
 513
 514   OpenGl_AspectFace*      myTextureParams;   //!< Stores texture and its parameters for textured background
 515   OpenGl_BackgroundArray* myBgGradientArray; //!< Primitive array for gradient background
 516   OpenGl_BackgroundArray* myBgTextureArray;  //!< Primitive array for texture  background
 517
 518 protected: //! @name data types related to ray-tracing
 519
 520   //! Result of OpenGL shaders initialization.
 521   enum RaytraceInitStatus
 522   {
 523     OpenGl_RT_NONE,
 524     OpenGl_RT_INIT,
 525     OpenGl_RT_FAIL
 526   };
 527
 528   //! Describes update mode (state).
 529   enum RaytraceUpdateMode
 530   {
 531     OpenGl_GUM_CHECK,   //!< check geometry state
 532     OpenGl_GUM_PREPARE, //!< collect unchanged objects
 533     OpenGl_GUM_REBUILD  //!< rebuild changed and new objects
 534   };
 535
 536   //! Defines frequently used shader variables.
 537   enum ShaderVariableIndex
 538   {
 539     OpenGl_RT_aPosition,
 540
 541     // camera position
 542     OpenGl_RT_uOriginLT,
 543     OpenGl_RT_uOriginLB,
 544     OpenGl_RT_uOriginRT,
 545     OpenGl_RT_uOriginRB,
 546     OpenGl_RT_uDirectLT,
 547     OpenGl_RT_uDirectLB,
 548     OpenGl_RT_uDirectRT,
 549     OpenGl_RT_uDirectRB,
 550     OpenGl_RT_uViewPrMat,
 551     OpenGl_RT_uUnviewMat,
 552
 553     // 3D scene params
 554     OpenGl_RT_uSceneRad,
 555     OpenGl_RT_uSceneEps,
 556     OpenGl_RT_uLightAmbnt,
 557     OpenGl_RT_uLightCount,
 558
 559     // background params
 560     OpenGl_RT_uBackColorTop,
 561     OpenGl_RT_uBackColorBot,
 562
 563     // ray-tracing params
 564     OpenGl_RT_uShadowsEnabled,
 565     OpenGl_RT_uReflectEnabled,
 566     OpenGl_RT_uSphereMapEnabled,
 567     OpenGl_RT_uSphereMapForBack,
 568     OpenGl_RT_uTexSamplersArray,
 569     OpenGl_RT_uBlockedRngEnabled,
 570
 571     // size of render window
 572     OpenGl_RT_uWinSizeX,
 573     OpenGl_RT_uWinSizeY,
 574
 575     // sampled frame params
 576     OpenGl_RT_uSampleWeight,
 577     OpenGl_RT_uFrameRndSeed,
 578
 579     // adaptive FSAA params
 580     OpenGl_RT_uOffsetX,
 581     OpenGl_RT_uOffsetY,
 582     OpenGl_RT_uSamples,
 583
 584     // adaptive path tracing images
 585     OpenGl_RT_uRenderImage,
 586     OpenGl_RT_uOffsetImage,
 587
 588     OpenGl_RT_NbVariables // special field
 589   };
 590
 591   //! Defines OpenGL texture samplers.
 592   enum ShaderSamplerNames
 593   {
 594     OpenGl_RT_SceneNodeInfoTexture  = 0,
 595     OpenGl_RT_SceneMinPointTexture  = 1,
 596     OpenGl_RT_SceneMaxPointTexture  = 2,
 597     OpenGl_RT_SceneTransformTexture = 3,
 598
 599     OpenGl_RT_GeometryVertexTexture = 4,
 600     OpenGl_RT_GeometryNormalTexture = 5,
 601     OpenGl_RT_GeometryTexCrdTexture = 6,
 602     OpenGl_RT_GeometryTriangTexture = 7,
 603
 604     OpenGl_RT_EnvironmentMapTexture = 8,
 605
 606     OpenGl_RT_RaytraceMaterialTexture = 9,
 607     OpenGl_RT_RaytraceLightSrcTexture = 10,
 608
 609     OpenGl_RT_FsaaInputTexture = 11,
 610     OpenGl_RT_PrevAccumTexture = 12,
 611
 612     OpenGl_RT_RaytraceDepthTexture = 13
 613   };
 614
 615   //! Defines OpenGL image samplers.
 616   enum ShaderImageNames
 617   {
 618     OpenGl_RT_OutputImageLft = 0,
 619     OpenGl_RT_OutputImageRgh = 1,
 620     OpenGl_RT_VisualErrorImage = 2,
 621     OpenGl_RT_TileOffsetsImage = 3
 622   };
 623
 624   //! Tool class for management of shader sources.
 625   class ShaderSource
 626   {
 627   public:
 628
 629     //! Default shader prefix - empty string.
 630     static const TCollection_AsciiString EMPTY_PREFIX;
 631
 632     //! Creates new uninitialized shader source.
 633     ShaderSource()
 634     {
 635       //
 636     }
 637
 638   public:
 639
 640     //! Returns error description in case of load fail.
 641     const TCollection_AsciiString& ErrorDescription() const
 642     {
 643       return myError;
 644     }
 645
 646     //! Returns prefix to insert before the source.
 647     const TCollection_AsciiString& Prefix() const
 648     {
 649       return myPrefix;
 650     }
 651
 652     //! Sets prefix to insert before the source.
 653     void SetPrefix (const TCollection_AsciiString& thePrefix)
 654     {
 655       myPrefix = thePrefix;
 656     }
 657
 658     //! Returns shader source combined with prefix.
 659     TCollection_AsciiString Source() const;
 660
 661     //! Loads shader source from specified files.
 662     Standard_Boolean LoadFromFiles (const TCollection_AsciiString* theFileNames, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
 663
 664     //! Loads shader source from specified strings.
 665     Standard_Boolean LoadFromStrings (const TCollection_AsciiString* theStrings, const TCollection_AsciiString& thePrefix = EMPTY_PREFIX);
 666
 667   private:
 668
 669     TCollection_AsciiString mySource; //!< Source string of the shader object
 670     TCollection_AsciiString myPrefix; //!< Prefix to insert before the source
 671     TCollection_AsciiString myError;  //!< error state
 672
 673   };
 674
 675   //! Default ray-tracing depth.
 676   static const Standard_Integer THE_DEFAULT_NB_BOUNCES = 3;
 677
 678   //! Default size of traversal stack.
 679   static const Standard_Integer THE_DEFAULT_STACK_SIZE = 10;
 680
 681   //! Compile-time ray-tracing parameters.
 682   struct RaytracingParams
 683   {
 684     //! Actual size of traversal stack in shader program.
 685     Standard_Integer StackSize;
 686
 687     //! Actual ray-tracing depth (number of ray bounces).
 688     Standard_Integer NbBounces;
 689
 690     //! Enables/disables light propagation through transparent media.
 691     Standard_Boolean TransparentShadows;
 692
 693     //! Enables/disables global illumination (GI) effects.
 694     Standard_Boolean GlobalIllumination;
 695
 696     //! Enables/disables the use of OpenGL bindless textures.
 697     Standard_Boolean UseBindlessTextures;
 698
 699     //! Enables/disables adaptive screen sampling for path tracing.
 700     Standard_Boolean AdaptiveScreenSampling;
 701
 702     //! Creates default compile-time ray-tracing parameters.
 703     RaytracingParams()
 704     : StackSize (THE_DEFAULT_STACK_SIZE),
 705       NbBounces (THE_DEFAULT_NB_BOUNCES),
 706       TransparentShadows (Standard_False),
 707       GlobalIllumination  (Standard_False),
 708       UseBindlessTextures (Standard_False),
 709       AdaptiveScreenSampling (Standard_False)
 710     {
 711       //
 712     }
 713   };
 714
 715   //! Describes state of OpenGL structure.
 716   struct StructState
 717   {
 718     Standard_Size StructureState;
 719     Standard_Size InstancedState;
 720
 721     //! Creates new structure state.
 722     StructState (const Standard_Size theStructureState = 0,
 723                  const Standard_Size theInstancedState = 0)
 724     : StructureState (theStructureState),
 725       InstancedState (theInstancedState)
 726     {
 727       //
 728     }
 729
 730     //! Creates new structure state.
 731     StructState (const OpenGl_Structure* theStructure)
 732     {
 733       StructureState = theStructure->ModificationState();
 734
 735       InstancedState = theStructure->InstancedStructure() != NULL ?
 736         theStructure->InstancedStructure()->ModificationState() : 0;
 737     }
 738   };
 739
 740 protected: //! @name methods related to ray-tracing
 741
 742   //! Updates 3D scene geometry for ray-tracing.
 743   Standard_Boolean updateRaytraceGeometry (const RaytraceUpdateMode      theMode,
 744                                            const Standard_Integer        theViewId,
 745                                            const Handle(OpenGl_Context)& theGlContext);
 746
 747   //! Updates 3D scene light sources for ray-tracing.
 748   Standard_Boolean updateRaytraceLightSources (const OpenGl_Mat4& theInvModelView, const Handle(OpenGl_Context)& theGlContext);
 749
 750   //! Updates environment map for ray-tracing.
 751   Standard_Boolean updateRaytraceEnvironmentMap (const Handle(OpenGl_Context)& theGlContext);
 752
 753   //! Checks to see if the OpenGL structure is modified.
 754   Standard_Boolean toUpdateStructure (const OpenGl_Structure* theStructure);
 755
 756   //! Adds OpenGL structure to ray-traced scene geometry.
 757   Standard_Boolean addRaytraceStructure (const OpenGl_Structure*       theStructure,
 758                                          const Handle(OpenGl_Context)& theGlContext);
 759
 760   //! Adds OpenGL groups to ray-traced scene geometry.
 761   Standard_Boolean addRaytraceGroups (const OpenGl_Structure*        theStructure,
 762                                       const OpenGl_RaytraceMaterial& theStructMat,
 763                                       const Handle(Geom_Transformation)& theTrsf,
 764                                       const Handle(OpenGl_Context)&  theGlContext);
 765
 766   //! Creates ray-tracing material properties.
 767   OpenGl_RaytraceMaterial convertMaterial (const OpenGl_AspectFace*      theAspect,
 768                                            const Handle(OpenGl_Context)& theGlContext);
 769
 770   //! Adds OpenGL primitive array to ray-traced scene geometry.
 771   OpenGl_TriangleSet* addRaytracePrimitiveArray (const OpenGl_PrimitiveArray* theArray,
 772                                                  const Standard_Integer       theMatID,
 773                                                  const OpenGl_Mat4*           theTrans);
 774
 775   //! Adds vertex indices from OpenGL primitive array to ray-traced scene geometry.
 776   Standard_Boolean addRaytraceVertexIndices (OpenGl_TriangleSet&                  theSet,
 777                                              const Standard_Integer               theMatID,
 778                                              const Standard_Integer               theCount,
 779                                              const Standard_Integer               theOffset,
 780                                              const OpenGl_PrimitiveArray&         theArray);
 781
 782   //! Adds OpenGL triangle array to ray-traced scene geometry.
 783   Standard_Boolean addRaytraceTriangleArray (OpenGl_TriangleSet&                  theSet,
 784                                              const Standard_Integer               theMatID,
 785                                              const Standard_Integer               theCount,
 786                                              const Standard_Integer               theOffset,
 787                                              const Handle(Graphic3d_IndexBuffer)& theIndices);
 788
 789   //! Adds OpenGL triangle fan array to ray-traced scene geometry.
 790   Standard_Boolean addRaytraceTriangleFanArray (OpenGl_TriangleSet&                  theSet,
 791                                                 const Standard_Integer               theMatID,
 792                                                 const Standard_Integer               theCount,
 793                                                 const Standard_Integer               theOffset,
 794                                                 const Handle(Graphic3d_IndexBuffer)& theIndices);
 795
 796   //! Adds OpenGL triangle strip array to ray-traced scene geometry.
 797   Standard_Boolean addRaytraceTriangleStripArray (OpenGl_TriangleSet&                  theSet,
 798                                                   const Standard_Integer               theMatID,
 799                                                   const Standard_Integer               theCount,
 800                                                   const Standard_Integer               theOffset,
 801                                                   const Handle(Graphic3d_IndexBuffer)& theIndices);
 802
 803   //! Adds OpenGL quadrangle array to ray-traced scene geometry.
 804   Standard_Boolean addRaytraceQuadrangleArray (OpenGl_TriangleSet&                  theSet,
 805                                                const Standard_Integer               theMatID,
 806                                                const Standard_Integer               theCount,
 807                                                const Standard_Integer               theOffset,
 808                                                const Handle(Graphic3d_IndexBuffer)& theIndices);
 809
 810   //! Adds OpenGL quadrangle strip array to ray-traced scene geometry.
 811   Standard_Boolean addRaytraceQuadrangleStripArray (OpenGl_TriangleSet&                  theSet,
 812                                                     const Standard_Integer               theMatID,
 813                                                     const Standard_Integer               theCount,
 814                                                     const Standard_Integer               theOffset,
 815                                                     const Handle(Graphic3d_IndexBuffer)& theIndices);
 816
 817   //! Adds OpenGL polygon array to ray-traced scene geometry.
 818   Standard_Boolean addRaytracePolygonArray (OpenGl_TriangleSet&                  theSet,
 819                                             const Standard_Integer               theMatID,
 820                                             const Standard_Integer               theCount,
 821                                             const Standard_Integer               theOffset,
 822                                             const Handle(Graphic3d_IndexBuffer)& theIndices);
 823
 824   //! Uploads ray-trace data to the GPU.
 825   Standard_Boolean uploadRaytraceData (const Handle(OpenGl_Context)& theGlContext);
 826
 827   //! Generates shader prefix based on current ray-tracing options.
 828   TCollection_AsciiString generateShaderPrefix (const Handle(OpenGl_Context)& theGlContext) const;
 829
 830   //! Performs safe exit when shaders initialization fails.
 831   Standard_Boolean safeFailBack (const TCollection_ExtendedString& theMessage,
 832                                  const Handle(OpenGl_Context)&     theGlContext);
 833
 834   //! Loads and compiles shader object from specified source.
 835   Handle(OpenGl_ShaderObject) initShader (const GLenum                  theType,
 836                                           const ShaderSource&           theSource,
 837                                           const Handle(OpenGl_Context)& theGlContext);
 838
 839   //! Creates shader program from the given vertex and fragment shaders.
 840   Handle(OpenGl_ShaderProgram) initProgram (const Handle(OpenGl_Context)&      theGlContext,
 841                                             const Handle(OpenGl_ShaderObject)& theVertShader,
 842                                             const Handle(OpenGl_ShaderObject)& theFragShader);
 843
 844   //! Initializes OpenGL/GLSL shader programs.
 845   Standard_Boolean initRaytraceResources (const Handle(OpenGl_Context)& theGlContext);
 846
 847   //! Releases OpenGL/GLSL shader programs.
 848   void releaseRaytraceResources (const Handle(OpenGl_Context)& theGlContext,
 849                                  const Standard_Boolean        theToRebuild = Standard_False);
 850
 851   //! Updates auxiliary OpenGL frame buffers.
 852   Standard_Boolean updateRaytraceBuffers (const Standard_Integer        theSizeX,
 853                                           const Standard_Integer        theSizeY,
 854                                           const Handle(OpenGl_Context)& theGlContext);
 855
 856   //! Generates viewing rays for corners of screen quad.
 857   void updateCamera (const OpenGl_Mat4& theOrientation,
 858                      const OpenGl_Mat4& theViewMapping,
 859                      OpenGl_Vec3*       theOrigins,
 860                      OpenGl_Vec3*       theDirects,
 861                      OpenGl_Mat4&       theView,
 862                      OpenGl_Mat4&       theUnView);
 863
 864   //! Binds ray-trace textures to corresponding texture units.
 865   void bindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
 866
 867   //! Unbinds ray-trace textures from corresponding texture unit.
 868   void unbindRaytraceTextures (const Handle(OpenGl_Context)& theGlContext);
 869
 870   //! Sets uniform state for the given ray-tracing shader program.
 871   Standard_Boolean setUniformState (const Standard_Integer        theProgramId,
 872                                     const Standard_Integer        theSizeX,
 873                                     const Standard_Integer        theSizeY,
 874                                     const Handle(OpenGl_Context)& theGlContext);
 875
 876   //! Runs ray-tracing shader programs.
 877   Standard_Boolean runRaytraceShaders (const Standard_Integer        theSizeX,
 878                                        const Standard_Integer        theSizeY,
 879                                        Graphic3d_Camera::Projection  theProjection,
 880                                        OpenGl_FrameBuffer*           theReadDrawFbo,
 881                                        const Handle(OpenGl_Context)& theGlContext);
 882
 883   //! Runs classical (Whitted-style) ray-tracing kernel.
 884   Standard_Boolean runRaytrace (const Standard_Integer        theSizeX,
 885                                 const Standard_Integer        theSizeY,
 886                                 Graphic3d_Camera::Projection  theProjection,
 887                                 OpenGl_FrameBuffer*           theReadDrawFbo,
 888                                 const Handle(OpenGl_Context)& theGlContext);
 889
 890   //! Runs path tracing (global illumination) kernel.
 891   Standard_Boolean runPathtrace (const Graphic3d_Camera::Projection theProjection,
 892                                  OpenGl_FrameBuffer*                theReadDrawFbo,
 893                                  const Handle(OpenGl_Context)&      theGlContext);
 894
 895   //! Redraws the window using OpenGL/GLSL ray-tracing or path tracing.
 896   Standard_Boolean raytrace (const Standard_Integer        theSizeX,
 897                              const Standard_Integer        theSizeY,
 898                              Graphic3d_Camera::Projection  theProjection,
 899                              OpenGl_FrameBuffer*           theReadDrawFbo,
 900                              const Handle(OpenGl_Context)& theGlContext);
 901
 902 protected: //! @name fields related to ray-tracing
 903
 904   //! Result of RT/PT shaders initialization.
 905   RaytraceInitStatus myRaytraceInitStatus;
 906
 907   //! Is ray-tracing geometry data valid?
 908   Standard_Boolean myIsRaytraceDataValid;
 909
 910   //! True if warning about missing extension GL_ARB_bindless_texture has been displayed.
 911   Standard_Boolean myIsRaytraceWarnTextures;
 912
 913   //! 3D scene geometry data for ray-tracing.
 914   OpenGl_RaytraceGeometry myRaytraceGeometry;
 915
 916   //! Compile-time ray-tracing parameters.
 917   RaytracingParams myRaytraceParameters;
 918
 919   //! Radius of bounding sphere of the scene.
 920   Standard_ShortReal myRaytraceSceneRadius;
 921   //! Scene epsilon to prevent self-intersections.
 922   Standard_ShortReal myRaytraceSceneEpsilon;
 923
 924   //! OpenGL/GLSL source of ray-tracing fragment shader.
 925   ShaderSource myRaytraceShaderSource;
 926   //! OpenGL/GLSL source of adaptive-AA fragment shader.
 927   ShaderSource myPostFSAAShaderSource;
 928   //! OpenGL/GLSL source of RT/PT display fragment shader.
 929   ShaderSource myOutImageShaderSource;
 930
 931   //! OpenGL/GLSL ray-tracing fragment shader.
 932   Handle(OpenGl_ShaderObject) myRaytraceShader;
 933   //! OpenGL/GLSL adaptive-AA fragment shader.
 934   Handle(OpenGl_ShaderObject) myPostFSAAShader;
 935   //! OpenGL/GLSL ray-tracing display fragment shader.
 936   Handle(OpenGl_ShaderObject) myOutImageShader;
 937
 938   //! OpenGL/GLSL ray-tracing shader program.
 939   Handle(OpenGl_ShaderProgram) myRaytraceProgram;
 940   //! OpenGL/GLSL adaptive-AA shader program.
 941   Handle(OpenGl_ShaderProgram) myPostFSAAProgram;
 942   //! OpenGL/GLSL program for displaying texture.
 943   Handle(OpenGl_ShaderProgram) myOutImageProgram;
 944
 945   //! Texture buffer of data records of bottom-level BVH nodes.
 946   Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
 947   //! Texture buffer of minimum points of bottom-level BVH nodes.
 948   Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
 949   //! Texture buffer of maximum points of bottom-level BVH nodes.
 950   Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;
 951   //! Texture buffer of transformations of high-level BVH nodes.
 952   Handle(OpenGl_TextureBufferArb) mySceneTransformTexture;
 953
 954   //! Texture buffer of vertex coords.
 955   Handle(OpenGl_TextureBufferArb) myGeometryVertexTexture;
 956   //! Texture buffer of vertex normals.
 957   Handle(OpenGl_TextureBufferArb) myGeometryNormalTexture;
 958   //! Texture buffer of vertex UV coords.
 959   Handle(OpenGl_TextureBufferArb) myGeometryTexCrdTexture;
 960   //! Texture buffer of triangle indices.
 961   Handle(OpenGl_TextureBufferArb) myGeometryTriangTexture;
 962
 963   //! Texture buffer of material properties.
 964   Handle(OpenGl_TextureBufferArb) myRaytraceMaterialTexture;
 965   //! Texture buffer of light source properties.
 966   Handle(OpenGl_TextureBufferArb) myRaytraceLightSrcTexture;
 967
 968   //! 1st framebuffer (FBO) to perform adaptive FSAA.
 969   //! Used in compatibility mode (no adaptive sampling).
 970   Handle(OpenGl_FrameBuffer) myRaytraceFBO1[2];
 971   //! 2nd framebuffer (FBO) to perform adaptive FSAA.
 972   //! Used in compatibility mode (no adaptive sampling).
 973   Handle(OpenGl_FrameBuffer) myRaytraceFBO2[2];
 974
 975   //! Output textures (2 textures are used in stereo mode).
 976   //! Used if adaptive screen sampling is activated.
 977   Handle(OpenGl_Texture) myRaytraceOutputTexture[2];
 978
 979   //! Texture containing per-tile visual error estimation.
 980   //! Used if adaptive screen sampling is activated.
 981   Handle(OpenGl_Texture) myRaytraceVisualErrorTexture;
 982   //! Texture containing offsets of sampled screen tiles.
 983   //! Used if adaptive screen sampling is activated.
 984   Handle(OpenGl_Texture) myRaytraceTileOffsetsTexture;
 985
 986   //! Vertex buffer (VBO) for drawing dummy quad.
 987   OpenGl_VertexBuffer myRaytraceScreenQuad;
 988
 989   //! Cached locations of frequently used uniform variables.
 990   Standard_Integer myUniformLocations[2][OpenGl_RT_NbVariables];
 991
 992   //! State of OpenGL structures reflected to ray-tracing.
 993   std::map<const OpenGl_Structure*, StructState> myStructureStates;
 994
 995   //! PrimitiveArray to TriangleSet map for scene partial update.
 996   std::map<Standard_Size, OpenGl_TriangleSet*> myArrayToTrianglesMap;
 997
 998   //! Set of IDs of non-raytracable elements (to detect updates).
 999   std::set<Standard_Integer> myNonRaytraceStructureIDs;
1000
1001   //! Render filter to filter out all raytracable structures.
1002   Handle(OpenGl_RaytraceFilter) myRaytraceFilter;
1003
1004   //! Marks if environment map should be updated.
1005   Standard_Boolean myToUpdateEnvironmentMap;
1006
1007   //! State of OpenGL layer list.
1008   Standard_Size myRaytraceLayerListState;
1009
1010   //! Number of accumulated frames (for progressive rendering).
1011   Standard_Integer myAccumFrames;
1012
1013   //! Stored ray origins used for detection of camera movements.
1014   OpenGl_Vec3 myPreviousOrigins[3];
1015
1016   //! Bullard RNG to produce random sequence.
1017   math_BullardGenerator myRNG;
1018
1019   //! Tool object for sampling screen tiles in PT mode.
1020   OpenGl_TileSampler myTileSampler;
1021
1022 public:
1023
1024   DEFINE_STANDARD_ALLOC
1025   DEFINE_STANDARD_RTTIEXT(OpenGl_View,Graphic3d_CView) // Type definition
1026
1027   friend class OpenGl_GraphicDriver;
1028   friend class OpenGl_Workspace;
1029 };
1030
1031 #endif // _OpenGl_View_Header