1 // Created on: 2011-09-20
2 // Created by: Sergey ZERCHANINOV
3 // Copyright (c) 2011-2013 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
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.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _OpenGl_Workspace_Header
17 #define _OpenGl_Workspace_Header
22 #include <OpenGl_Window.hxx>
24 #include <TColStd_Array2OfReal.hxx>
25 #include <Quantity_Color.hxx>
26 #include <Graphic3d_CView.hxx>
27 #include <Graphic3d_TypeOfComposition.hxx>
28 #include <Graphic3d_TypeOfTexture.hxx>
29 #include <Graphic3d_PtrFrameBuffer.hxx>
30 #include <Graphic3d_BufferType.hxx>
32 #include <Aspect_Handle.hxx>
33 #include <Aspect_PrintAlgo.hxx>
34 #include <Aspect_PolygonOffsetMode.hxx>
36 #include <InterfaceGraphic_Graphic3d.hxx>
37 #include <InterfaceGraphic_Visual3d.hxx>
39 #include <NCollection_Sequence.hxx>
41 #include <OpenGl_AspectFace.hxx>
42 #include <OpenGl_FrameBuffer.hxx>
43 #include <OpenGl_Matrix.hxx>
44 #include <OpenGl_NamedStatus.hxx>
45 #include <OpenGl_PrinterContext.hxx>
46 #include <OpenGl_SceneGeometry.hxx>
47 #include <OpenGl_TextParam.hxx>
48 #include <OpenGl_RenderFilter.hxx>
49 #include <OpenGl_Vec.hxx>
50 #include <OpenGl_LineAttributes.hxx>
51 #include <OpenGl_CappingAlgo.hxx>
54 #include <OpenGl_ShaderObject.hxx>
55 #include <OpenGl_ShaderProgram.hxx>
56 #include <OpenGl_TextureBufferArb.hxx>
58 class OpenGl_AspectLine;
59 class OpenGl_AspectMarker;
60 class OpenGl_AspectText;
61 class OpenGl_FrameBuffer;
62 class OpenGl_Structure;
63 class OpenGl_TriangleSet;
68 //! OpenGL material definition
69 struct OpenGl_Material
72 OpenGl_Vec4 Ambient; //!< ambient reflection coefficient
73 OpenGl_Vec4 Diffuse; //!< diffuse reflection coefficient
74 OpenGl_Vec4 Specular; //!< glossy reflection coefficient
75 OpenGl_Vec4 Emission; //!< material emission
76 OpenGl_Vec4 Params; //!< extra packed parameters
78 Standard_ShortReal Shine() const { return Params.x(); }
79 Standard_ShortReal& ChangeShine() { return Params.x(); }
81 Standard_ShortReal Transparency() const { return Params.y(); }
82 Standard_ShortReal& ChangeTransparency() { return Params.y(); }
84 //! Initialize material
85 void Init (const OPENGL_SURF_PROP& theProps);
87 //! Returns packed (serialized) representation of material properties
88 const OpenGl_Vec4* Packed() const { return reinterpret_cast<const OpenGl_Vec4*> (this); }
89 static Standard_Integer NbOfVec4() { return 5; }
93 class OpenGl_RaytraceFilter;
94 DEFINE_STANDARD_HANDLE (OpenGl_RaytraceFilter, OpenGl_RenderFilter)
96 //! Graphical ray-tracing filter.
97 //! Filters out all raytracable structures.
98 class OpenGl_RaytraceFilter : public OpenGl_RenderFilter
102 //! Default constructor.
103 OpenGl_RaytraceFilter() {}
105 //! Returns the previously set filter.
106 const Handle(OpenGl_RenderFilter)& PrevRenderFilter()
108 return myPrevRenderFilter;
111 //! Remembers the previously set filter.
112 void SetPrevRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
114 myPrevRenderFilter = theFilter;
117 //! Checks whether the element can be rendered or not.
118 //! @param theElement [in] the element to check.
119 //! @return True if element can be rendered.
120 virtual Standard_Boolean CanRender (const OpenGl_Element* theElement);
124 Handle(OpenGl_RenderFilter) myPrevRenderFilter;
128 DEFINE_STANDARD_RTTI(OpenGl_RaytraceFilter, OpenGl_RenderFilter)
131 class OpenGl_Workspace;
132 DEFINE_STANDARD_HANDLE(OpenGl_Workspace,OpenGl_Window)
134 //! Represents window with GL context.
135 //! Provides methods to render primitives and maintain GL state.
136 class OpenGl_Workspace : public OpenGl_Window
140 //! Main constructor - prepare GL context for specified window.
141 Standard_EXPORT OpenGl_Workspace (const Handle(OpenGl_GraphicDriver)& theDriver,
142 const CALL_DEF_WINDOW& theCWindow,
143 Aspect_RenderingContext theGContext,
144 const Handle(OpenGl_Caps)& theCaps,
145 const Handle(OpenGl_Context)& theShareCtx);
148 Standard_EXPORT virtual ~OpenGl_Workspace();
150 Standard_EXPORT void SetActiveView (const Handle(OpenGl_View)& theView,
151 const Standard_Integer theViewId);
153 const Handle(OpenGl_View)& ActiveView() const { return myView; }
155 Standard_Integer ActiveViewId() const { return myViewId; }
157 //! Redraw the window.
158 Standard_EXPORT virtual void Redraw (const Graphic3d_CView& theCView);
160 Standard_Boolean SetImmediateModeDrawToFront (const Standard_Boolean theDrawToFrontBuffer);
161 Standard_EXPORT virtual void RedrawImmediate (const Graphic3d_CView& theCView);
163 //! Mark cached view content invalid (e.g. complete view redraw should be performed on next frame).
164 void Invalidate() { myBackBufferRestored = Standard_False; }
166 //! Return true if view content cache has been invalidated.
167 Standard_Boolean IsInvalidated() const { return !myBackBufferRestored; }
169 //! Special method to perform printing.
170 //! System-specific and currently only Win platform implemented.
171 Standard_Boolean Print (const Handle(OpenGl_PrinterContext)& thePrintContext,
172 const Graphic3d_CView& theCView,
173 const Aspect_Handle theHPrintDC,
174 const Standard_Boolean theToShowBackground,
175 const Standard_CString theFileName,
176 const Aspect_PrintAlgo thePrintAlgorithm,
177 const Standard_Real theScaleFactor);
179 const Handle(OpenGl_PrinterContext)& PrinterContext() const
181 return myPrintContext;
184 void DisplayCallback (const Graphic3d_CView& theCView, int theReason);
186 Graphic3d_PtrFrameBuffer FBOCreate (const Standard_Integer theWidth, const Standard_Integer theHeight);
187 void FBORelease (Graphic3d_PtrFrameBuffer theFBOPtr);
188 Standard_Boolean BufferDump (OpenGl_FrameBuffer* theFBOPtr,
189 Image_PixMap& theImage,
190 const Graphic3d_BufferType& theBufferType);
192 //! Setup Z-buffer usage flag (without affecting GL state!).
193 //! Returns previously set flag.
194 Standard_Boolean SetUseZBuffer (const Standard_Boolean theToUse)
196 const Standard_Boolean wasUsed = myUseZBuffer;
197 myUseZBuffer = theToUse;
201 Standard_Boolean& UseZBuffer() { return myUseZBuffer; }
202 Standard_Boolean& UseDepthWrite() { return myUseDepthWrite; }
203 Standard_Boolean& UseGLLight() { return myUseGLLight; }
205 Standard_Integer AntiAliasingMode() const { return myAntiAliasingMode; }
207 //// RELATED TO STATUS ////
209 Standard_Integer NamedStatus;
211 const TEL_COLOUR* HighlightColor;
213 const OpenGl_AspectLine* SetAspectLine (const OpenGl_AspectLine* theAspect);
214 const OpenGl_AspectFace* SetAspectFace (const OpenGl_AspectFace* theAspect);
215 const OpenGl_AspectMarker* SetAspectMarker (const OpenGl_AspectMarker* theAspect);
216 const OpenGl_AspectText* SetAspectText (const OpenGl_AspectText* theAspect);
218 void SetTextParam (const OpenGl_TextParam* theParam) { TextParam_set = theParam; }
220 //// THESE METHODS ARE EXPORTED AS THEY PROVIDE STATE INFO TO USERDRAW
221 Standard_EXPORT const OpenGl_AspectLine* AspectLine (const Standard_Boolean theWithApply);
222 Standard_EXPORT const OpenGl_AspectFace* AspectFace (const Standard_Boolean theWithApply);
223 Standard_EXPORT const OpenGl_AspectMarker* AspectMarker (const Standard_Boolean theWithApply);
224 Standard_EXPORT const OpenGl_AspectText* AspectText (const Standard_Boolean theWithApply);
225 inline const OpenGl_TextParam* AspectTextParams() const
227 return TextParam_applied;
230 //! Clear the applied aspect state.
231 void ResetAppliedAspect();
233 Standard_EXPORT Handle(OpenGl_Texture) DisableTexture();
234 Standard_EXPORT Handle(OpenGl_Texture) EnableTexture (const Handle(OpenGl_Texture)& theTexture,
235 const Handle(Graphic3d_TextureParams)& theParams = NULL);
236 const Handle(OpenGl_Texture)& ActiveTexture() const { return myTextureBound; }
238 //! Set filter for restricting rendering of particular elements.
239 //! Filter can be applied for rendering passes used by recursive
240 //! rendering algorithms for rendering elements of groups.
241 //! @param theFilter [in] the filter instance.
242 inline void SetRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
244 myRenderFilter = theFilter;
247 //! Get rendering filter.
248 //! @return filter instance.
249 inline const Handle(OpenGl_RenderFilter)& GetRenderFilter() const
251 return myRenderFilter;
254 //! @return applied view matrix.
255 inline const OpenGl_Matrix* ViewMatrix() const { return ViewMatrix_applied; }
257 //! @return applied model structure matrix.
258 inline const OpenGl_Matrix* ModelMatrix() const { return StructureMatrix_applied; }
260 //! Sets and applies current polygon offset.
261 void SetPolygonOffset (int theMode, Standard_ShortReal theFactor, Standard_ShortReal theUnits);
263 //! Returns currently applied polygon offset params.
264 const TEL_POFFSET_PARAM& AppliedPolygonOffset() { return PolygonOffset_applied; }
266 //! @return true if clipping algorithm enabled
267 inline Standard_Boolean IsCullingEnabled() const { return myIsCullingEnabled; }
269 //! Returns capping algorithm rendering filter.
270 const Handle(OpenGl_CappingAlgoFilter)& DefaultCappingAlgoFilter() const
272 return myDefaultCappingAlgoFilter;
275 //! Returns face aspect for none culling mode.
276 const OpenGl_AspectFace& NoneCulling() const
278 return myNoneCulling;
281 //! Returns face aspect for front face culling mode.
282 const OpenGl_AspectFace& FrontCulling() const
284 return myFrontCulling;
289 //! Copy content of Back buffer to the Front buffer
290 void copyBackToFront();
292 //! Initialize blit quad.
293 Standard_EXPORT OpenGl_VertexBuffer* initBlitQuad (const Standard_Boolean theToFlip);
295 //! Blit image from/to specified buffers.
296 Standard_EXPORT bool blitBuffers (OpenGl_FrameBuffer* theReadFbo,
297 OpenGl_FrameBuffer* theDrawFbo,
298 const Standard_Boolean theToFlip = Standard_False);
300 Standard_EXPORT virtual Standard_Boolean Activate();
302 void redraw1 (const Graphic3d_CView& theCView,
303 OpenGl_FrameBuffer* theReadDrawFbo,
304 const Graphic3d_Camera::Projection theProjection);
306 //! Setup default FBO.
307 void bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo = NULL);
309 //! Blend together views pair into stereo image.
310 void drawStereoPair (const Graphic3d_CView& theCView);
312 //! Blit snapshot containing main scene (myMainSceneFbos or BackBuffer)
313 //! into presentation buffer (myMainSceneFbos -> offscreen FBO or myMainSceneFbos -> BackBuffer or BackBuffer -> FrontBuffer),
314 //! and redraw immediate structures on top.
316 //! When scene caching is disabled (myTransientDrawToFront, no double buffer in window, etc.),
317 //! the first step (blitting) will be skipped.
319 //! @return false if immediate structures has been rendered directly into FrontBuffer and Buffer Swap should not be called.
320 bool redrawImmediate (const Graphic3d_CView& theCView,
321 OpenGl_FrameBuffer* theReadFbo,
322 const Graphic3d_Camera::Projection theProjection,
323 OpenGl_FrameBuffer* theDrawFbo,
324 const Standard_Boolean theIsPartialUpdate = Standard_False);
326 void updateMaterial (const int theFlag);
328 void setTextureParams (Handle(OpenGl_Texture)& theTexture,
329 const Handle(Graphic3d_TextureParams)& theParams);
331 protected: //! @name protected fields
333 //! Two framebuffers (left and right views) store cached main presentation
334 //! of the view (without presentation of immediate layers).
335 Handle(OpenGl_FrameBuffer) myMainSceneFbos[2];
336 //! Additional buffers for immediate layer in stereo mode.
337 Handle(OpenGl_FrameBuffer) myImmediateSceneFbos[2];
338 //! Special flag which is invalidated when myMainSceneFbos can not be blitted for some reason (e.g. driver bugs).
339 Standard_Boolean myHasFboBlit;
341 //! Flag to draw result image upside-down
342 Standard_Boolean myToFlipOutput;
344 //! Vertices for full-screen quad rendering.
345 OpenGl_VertexBuffer myFullScreenQuad;
346 OpenGl_VertexBuffer myFullScreenQuadFlip;
348 Handle(OpenGl_PrinterContext) myPrintContext;
349 Handle(OpenGl_View) myView;
350 Handle(OpenGl_LineAttributes) myLineAttribs;
351 Standard_Integer myViewId;
352 Standard_Integer myAntiAliasingMode;
353 Standard_Boolean myTransientDrawToFront; //!< optimization flag for immediate mode (to render directly to the front buffer)
354 Standard_Boolean myBackBufferRestored;
355 Standard_Boolean myIsImmediateDrawn; //!< flag indicates that immediate mode buffer contains some data
356 Standard_Boolean myUseZBuffer;
357 Standard_Boolean myUseDepthWrite;
358 Standard_Boolean myUseGLLight;
359 Standard_Boolean myIsCullingEnabled; //!< frustum culling flag
361 unsigned int myFrameCounter; //!< redraw counter, for debugging
363 Handle(OpenGl_CappingAlgoFilter) myDefaultCappingAlgoFilter;
364 OpenGl_AspectFace myNoneCulling;
365 OpenGl_AspectFace myFrontCulling;
367 protected: //! @name fields related to status
369 Handle(OpenGl_RenderFilter) myRenderFilter;
370 Handle(OpenGl_Texture) myTextureBound; //!< currently bound texture (managed by OpenGl_AspectFace and OpenGl_View environment texture)
371 const OpenGl_AspectLine *AspectLine_set, *AspectLine_applied;
372 const OpenGl_AspectFace *AspectFace_set, *AspectFace_applied;
373 const OpenGl_AspectMarker *AspectMarker_set, *AspectMarker_applied;
374 const OpenGl_AspectText *AspectText_set, *AspectText_applied;
376 const OpenGl_TextParam *TextParam_set, *TextParam_applied;
378 const OpenGl_Matrix* ViewMatrix_applied;
379 const OpenGl_Matrix* StructureMatrix_applied;
381 OpenGl_Material myMatFront; //!< current front material state (cached to reduce GL context updates)
382 OpenGl_Material myMatBack; //!< current back material state
383 OpenGl_Material myMatTmp; //!< temporary variable
384 TelCullMode myCullingMode; //!< back face culling mode, applied from face aspect
386 OpenGl_Matrix myModelViewMatrix; //!< Model matrix with applied structure transformations
388 TEL_POFFSET_PARAM PolygonOffset_applied; //!< Currently applied polygon offset.
390 OpenGl_AspectFace myAspectFaceHl; //!< Hiddenline aspect
392 public: //! @name type definition
394 DEFINE_STANDARD_RTTI(OpenGl_Workspace, OpenGl_Window)
395 DEFINE_STANDARD_ALLOC
399 #endif // _OpenGl_Workspace_Header