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
19 #include <Graphic3d_BufferType.hxx>
21 #include <OpenGl_AspectFace.hxx>
22 #include <OpenGl_CappingAlgo.hxx>
23 #include <OpenGl_FrameBuffer.hxx>
24 #include <OpenGl_Matrix.hxx>
25 #include <OpenGl_NamedStatus.hxx>
26 #include <OpenGl_RenderFilter.hxx>
27 #include <OpenGl_ShaderObject.hxx>
28 #include <OpenGl_ShaderProgram.hxx>
29 #include <OpenGl_TextParam.hxx>
30 #include <OpenGl_TextureBufferArb.hxx>
31 #include <OpenGl_Vec.hxx>
32 #include <OpenGl_Window.hxx>
37 //! OpenGL material definition
38 struct OpenGl_Material
41 OpenGl_Vec4 Ambient; //!< ambient reflection coefficient
42 OpenGl_Vec4 Diffuse; //!< diffuse reflection coefficient
43 OpenGl_Vec4 Specular; //!< glossy reflection coefficient
44 OpenGl_Vec4 Emission; //!< material emission
45 OpenGl_Vec4 Params; //!< extra packed parameters
47 Standard_ShortReal Shine() const { return Params.x(); }
48 Standard_ShortReal& ChangeShine() { return Params.x(); }
50 Standard_ShortReal Transparency() const { return Params.y(); }
51 Standard_ShortReal& ChangeTransparency() { return Params.y(); }
53 //! Set material color.
54 void SetColor (const OpenGl_Vec4& theColor)
56 // apply the same formula as in Graphic3d_MaterialAspect::SetColor()
57 Ambient.xyz() = theColor.rgb() * 0.25f;
58 Diffuse.xyz() = theColor.rgb();
61 //! Initialize material
62 void Init (const Graphic3d_MaterialAspect& theProp,
63 const Quantity_Color& theInteriorColor);
65 //! Returns packed (serialized) representation of material properties
66 const OpenGl_Vec4* Packed() const { return reinterpret_cast<const OpenGl_Vec4*> (this); }
67 static Standard_Integer NbOfVec4() { return 5; }
71 class OpenGl_RaytraceFilter;
72 DEFINE_STANDARD_HANDLE (OpenGl_RaytraceFilter, OpenGl_RenderFilter)
74 //! Graphical ray-tracing filter.
75 //! Filters out all raytracable structures.
76 class OpenGl_RaytraceFilter : public OpenGl_RenderFilter
80 //! Default constructor.
81 OpenGl_RaytraceFilter() {}
83 //! Returns the previously set filter.
84 const Handle(OpenGl_RenderFilter)& PrevRenderFilter()
86 return myPrevRenderFilter;
89 //! Remembers the previously set filter.
90 void SetPrevRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
92 myPrevRenderFilter = theFilter;
95 //! Checks whether the element can be rendered or not.
96 //! @param theElement [in] the element to check.
97 //! @return True if element can be rendered.
98 virtual Standard_Boolean CanRender (const OpenGl_Element* theElement) Standard_OVERRIDE;
102 Handle(OpenGl_RenderFilter) myPrevRenderFilter;
106 DEFINE_STANDARD_RTTIEXT(OpenGl_RaytraceFilter,OpenGl_RenderFilter)
109 class OpenGl_Workspace;
110 DEFINE_STANDARD_HANDLE(OpenGl_Workspace,Standard_Transient)
112 //! Rendering workspace.
113 //! Provides methods to render primitives and maintain GL state.
114 class OpenGl_Workspace : public Standard_Transient
118 //! Constructor of rendering workspace.
119 Standard_EXPORT OpenGl_Workspace (OpenGl_View* theView, const Handle(OpenGl_Window)& theWindow);
122 virtual ~OpenGl_Workspace() {}
124 //! Activate rendering context.
125 Standard_EXPORT Standard_Boolean Activate();
127 OpenGl_View* View() const { return myView; }
129 const Handle(OpenGl_Context)& GetGlContext() { return myGlContext; }
131 Standard_EXPORT Handle(OpenGl_FrameBuffer) FBOCreate (const Standard_Integer theWidth, const Standard_Integer theHeight);
133 Standard_EXPORT void FBORelease (Handle(OpenGl_FrameBuffer)& theFbo);
135 Standard_Boolean BufferDump (const Handle(OpenGl_FrameBuffer)& theFbo,
136 Image_PixMap& theImage,
137 const Graphic3d_BufferType& theBufferType);
139 Standard_EXPORT Standard_Integer Width() const;
141 Standard_EXPORT Standard_Integer Height() const;
143 //! Setup Z-buffer usage flag (without affecting GL state!).
144 //! Returns previously set flag.
145 Standard_Boolean SetUseZBuffer (const Standard_Boolean theToUse)
147 const Standard_Boolean wasUsed = myUseZBuffer;
148 myUseZBuffer = theToUse;
152 //! @return true if usage of Z buffer is enabled.
153 Standard_Boolean& UseZBuffer() { return myUseZBuffer; }
155 //! @return true if depth writing is enabled.
156 Standard_Boolean& UseDepthWrite() { return myUseDepthWrite; }
158 //! @return true if usage of GL light is enabled.
159 Standard_EXPORT Standard_Boolean UseGLLight() const;
161 //! @return true if clipping algorithm enabled
162 Standard_EXPORT Standard_Boolean IsCullingEnabled() const;
164 Standard_Integer NamedStatus;
166 //// RELATED TO STATUS ////
168 const OpenGl_Vec4* HighlightColor;
170 //! Return true if active group might activate face culling (e.g. primitives are closed).
171 bool ToAllowFaceCulling() const { return myToAllowFaceCulling; }
173 //! Allow or disallow face culling.
174 //! This call does NOT affect current state of back face culling;
175 //! ApplyAspectFace() should be called to update state.
176 void SetAllowFaceCulling (bool theToAllow) { myToAllowFaceCulling = theToAllow; }
178 //! Return true if following structures should apply highlight color.
179 bool ToHighlight() const { return myToHighlight; }
182 void SetHighlight (bool theToHighlight) { myToHighlight = theToHighlight; }
184 //! Return line color taking into account highlight flag.
185 const OpenGl_Vec4& LineColor() const
189 : myAspectLineSet->Aspect()->ColorRGBA();
192 //! Return edge color taking into account highlight flag.
193 const OpenGl_Vec4& EdgeColor() const
197 : myAspectFaceSet->AspectEdge()->Aspect()->ColorRGBA();
200 //! Return marker color taking into account highlight flag.
201 const OpenGl_Vec4& MarkerColor() const
205 : myAspectMarkerSet->Aspect()->ColorRGBA();
208 //! Return Interior color taking into account highlight flag.
209 const OpenGl_Vec4& InteriorColor() const
213 : myAspectFaceSet->Aspect()->InteriorColorRGBA();
216 //! Return text color taking into account highlight flag.
217 const OpenGl_Vec4& TextColor() const
221 : myAspectTextSet->Aspect()->ColorRGBA();
224 //! Return text Subtitle color taking into account highlight flag.
225 const OpenGl_Vec4& TextSubtitleColor() const
229 : myAspectTextSet->Aspect()->ColorSubTitleRGBA();
232 //! Currently set line aspect (can differ from applied).
233 const OpenGl_AspectLine* AspectLine() const { return myAspectLineSet; }
235 //! Currently set face aspect (can differ from applied).
236 const OpenGl_AspectFace* AspectFace() const { return myAspectFaceSet; }
238 //! Currently set marker aspect (can differ from applied).
239 const OpenGl_AspectMarker* AspectMarker() const { return myAspectMarkerSet; }
241 //! Currently set text aspect (can differ from applied).
242 const OpenGl_AspectText* AspectText() const { return myAspectTextSet; }
244 //! Assign new line aspect (will be applied within ApplyAspectLine()).
245 Standard_EXPORT const OpenGl_AspectLine* SetAspectLine (const OpenGl_AspectLine* theAspect);
247 //! Assign new face aspect (will be applied within ApplyAspectFace()).
248 Standard_EXPORT const OpenGl_AspectFace* SetAspectFace (const OpenGl_AspectFace* theAspect);
250 //! Assign new marker aspect (will be applied within ApplyAspectMarker()).
251 Standard_EXPORT const OpenGl_AspectMarker* SetAspectMarker (const OpenGl_AspectMarker* theAspect);
253 //! Assign new text aspect (will be applied within ApplyAspectText()).
254 Standard_EXPORT const OpenGl_AspectText* SetAspectText (const OpenGl_AspectText* theAspect);
256 //! Apply line aspect.
257 //! @return aspect set by SetAspectLine()
258 const OpenGl_AspectLine* ApplyAspectLine() { return myAspectLineSet; }
260 //! Apply face aspect.
261 //! @return aspect set by SetAspectFace()
262 Standard_EXPORT const OpenGl_AspectFace* ApplyAspectFace();
264 //! Apply marker aspect.
265 //! @return aspect set by SetAspectMarker()
266 Standard_EXPORT const OpenGl_AspectMarker* ApplyAspectMarker();
268 //! Apply text aspect.
269 //! @return aspect set by SetAspectText()
270 const OpenGl_AspectText* ApplyAspectText() { return myAspectTextSet; }
272 //! Clear the applied aspect state to default values.
273 void ResetAppliedAspect();
275 Standard_EXPORT Handle(OpenGl_Texture) DisableTexture();
276 Standard_EXPORT Handle(OpenGl_Texture) EnableTexture (const Handle(OpenGl_Texture)& theTexture,
277 const Handle(Graphic3d_TextureParams)& theParams = NULL);
278 const Handle(OpenGl_Texture)& ActiveTexture() const { return myTextureBound; }
280 //! Set filter for restricting rendering of particular elements.
281 //! Filter can be applied for rendering passes used by recursive
282 //! rendering algorithms for rendering elements of groups.
283 //! @param theFilter [in] the filter instance.
284 inline void SetRenderFilter (const Handle(OpenGl_RenderFilter)& theFilter)
286 myRenderFilter = theFilter;
289 //! Get rendering filter.
290 //! @return filter instance.
291 inline const Handle(OpenGl_RenderFilter)& GetRenderFilter() const
293 return myRenderFilter;
296 //! @return applied view matrix.
297 inline const OpenGl_Matrix* ViewMatrix() const { return ViewMatrix_applied; }
299 //! @return applied model structure matrix.
300 inline const OpenGl_Matrix* ModelMatrix() const { return StructureMatrix_applied; }
302 //! Sets and applies current polygon offset.
303 void SetPolygonOffset (const Graphic3d_PolygonOffset& theParams);
305 //! Returns currently applied polygon offset parameters.
306 const Graphic3d_PolygonOffset& AppliedPolygonOffset() { return myPolygonOffsetApplied; }
308 //! Returns capping algorithm rendering filter.
309 const Handle(OpenGl_CappingAlgoFilter)& DefaultCappingAlgoFilter() const
311 return myDefaultCappingAlgoFilter;
314 //! Returns face aspect for none culling mode.
315 const OpenGl_AspectFace& NoneCulling() const
317 return myNoneCulling;
320 //! Returns face aspect for front face culling mode.
321 const OpenGl_AspectFace& FrontCulling() const
323 return myFrontCulling;
326 //! Sets a new environment texture.
327 void SetEnvironmentTexture (const Handle(OpenGl_Texture)& theTexture)
329 myEnvironmentTexture = theTexture;
332 //! Returns environment texture.
333 const Handle(OpenGl_Texture)& EnvironmentTexture() const
335 return myEnvironmentTexture;
342 TEL_FRONT_MATERIAL = 1,
343 TEL_BACK_MATERIAL = 2
346 void updateMaterial (const int theFlag);
348 void setTextureParams (Handle(OpenGl_Texture)& theTexture,
349 const Handle(Graphic3d_TextureParams)& theParams);
351 protected: //! @name protected fields
354 Handle(OpenGl_Window) myWindow;
355 Handle(OpenGl_Context) myGlContext;
356 Standard_Boolean myUseZBuffer;
357 Standard_Boolean myUseDepthWrite;
358 Standard_Boolean myUseGLLight;
359 Handle(OpenGl_CappingAlgoFilter) myDefaultCappingAlgoFilter;
360 OpenGl_AspectFace myNoneCulling;
361 OpenGl_AspectFace myFrontCulling;
363 protected: //! @name fields related to status
365 Handle(OpenGl_RenderFilter) myRenderFilter;
366 Handle(OpenGl_Texture) myTextureBound; //!< currently bound texture (managed by OpenGl_AspectFace and OpenGl_View environment texture)
367 const OpenGl_AspectLine* myAspectLineSet;
368 const OpenGl_AspectFace* myAspectFaceSet;
369 Handle(Graphic3d_AspectFillArea3d) myAspectFaceApplied;
370 const OpenGl_AspectMarker* myAspectMarkerSet;
371 Handle(Graphic3d_AspectMarker3d) myAspectMarkerApplied;
372 const OpenGl_AspectText* myAspectTextSet;
373 bool myAspectFaceAppliedWithHL;
375 const OpenGl_Matrix* ViewMatrix_applied;
376 const OpenGl_Matrix* StructureMatrix_applied;
378 OpenGl_Material myMatFront; //!< current front material state (cached to reduce GL context updates)
379 OpenGl_Material myMatBack; //!< current back material state
380 OpenGl_Material myMatTmp; //!< temporary variable
381 bool myToAllowFaceCulling; //!< allow back face culling
382 bool myToHighlight; //!< flag indicating highlighting mode
384 OpenGl_Matrix myModelViewMatrix; //!< Model matrix with applied structure transformations
386 Graphic3d_PolygonOffset myPolygonOffsetApplied; //!< currently applied polygon offset
388 OpenGl_AspectFace myAspectFaceHl; //!< Hiddenline aspect
390 Handle(OpenGl_Texture) myEnvironmentTexture;
392 public: //! @name type definition
394 DEFINE_STANDARD_RTTIEXT(OpenGl_Workspace,Standard_Transient)
395 DEFINE_STANDARD_ALLOC
399 #endif // _OpenGl_Workspace_Header