1 // Created on: 2013-09-19
2 // Created by: Denis BOGOLEPOV
3 // Copyright (c) 2013-2014 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_ShaderProgram_Header
17 #define _OpenGl_ShaderProgram_Header
19 #include <NCollection_DataMap.hxx>
20 #include <NCollection_Sequence.hxx>
21 #include <TCollection_AsciiString.hxx>
23 #include <Graphic3d_ShaderObject.hxx>
24 #include <Graphic3d_ShaderProgram.hxx>
26 #include <OpenGl_Vec.hxx>
27 #include <OpenGl_Matrix.hxx>
28 #include <OpenGl_NamedResource.hxx>
29 #include <OpenGl_ShaderObject.hxx>
31 class OpenGl_ShaderProgram;
32 DEFINE_STANDARD_HANDLE(OpenGl_ShaderProgram, OpenGl_NamedResource)
34 //! The enumeration of OCCT-specific OpenGL/GLSL variables.
35 enum OpenGl_StateVariable
37 // OpenGL matrix state
38 OpenGl_OCC_MODEL_WORLD_MATRIX,
39 OpenGl_OCC_WORLD_VIEW_MATRIX,
40 OpenGl_OCC_PROJECTION_MATRIX,
41 OpenGl_OCC_MODEL_WORLD_MATRIX_INVERSE,
42 OpenGl_OCC_WORLD_VIEW_MATRIX_INVERSE,
43 OpenGl_OCC_PROJECTION_MATRIX_INVERSE,
44 OpenGl_OCC_MODEL_WORLD_MATRIX_TRANSPOSE,
45 OpenGl_OCC_WORLD_VIEW_MATRIX_TRANSPOSE,
46 OpenGl_OCC_PROJECTION_MATRIX_TRANSPOSE,
47 OpenGl_OCC_MODEL_WORLD_MATRIX_INVERSE_TRANSPOSE,
48 OpenGl_OCC_WORLD_VIEW_MATRIX_INVERSE_TRANSPOSE,
49 OpenGl_OCC_PROJECTION_MATRIX_INVERSE_TRANSPOSE,
51 // OpenGL clip planes state
52 OpenGl_OCC_CLIP_PLANE_EQUATIONS,
53 OpenGl_OCC_CLIP_PLANE_CHAINS,
54 OpenGl_OCC_CLIP_PLANE_COUNT,
57 OpenGl_OCC_LIGHT_SOURCE_COUNT,
58 OpenGl_OCC_LIGHT_SOURCE_TYPES,
59 OpenGl_OCC_LIGHT_SOURCE_PARAMS,
60 OpenGl_OCC_LIGHT_AMBIENT,
63 OpenGl_OCCT_TEXTURE_ENABLE,
64 OpenGl_OCCT_DISTINGUISH_MODE,
65 OpenGl_OCCT_FRONT_MATERIAL,
66 OpenGl_OCCT_BACK_MATERIAL,
67 OpenGl_OCCT_ALPHA_CUTOFF,
70 // Weighted, Blended Order-Independent Transparency rendering state
71 OpenGl_OCCT_OIT_OUTPUT,
72 OpenGl_OCCT_OIT_DEPTH_FACTOR,
74 // Context-dependent state
75 OpenGl_OCCT_TEXTURE_TRSF2D,
76 OpenGl_OCCT_POINT_SIZE,
80 OpenGl_OCCT_LINE_WIDTH,
81 OpenGl_OCCT_LINE_FEATHER,
82 OpenGl_OCCT_WIREFRAME_COLOR,
83 OpenGl_OCCT_QUAD_MODE_STATE,
85 // DON'T MODIFY THIS ITEM (insert new items before it)
86 OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES
89 //! Interface for generic setter of user-defined uniform variables.
90 struct OpenGl_SetterInterface
92 //! Sets user-defined uniform variable to specified program.
93 virtual void Set (const Handle(OpenGl_Context)& theCtx,
94 const Handle(Graphic3d_ShaderVariable)& theVariable,
95 OpenGl_ShaderProgram* theProgram) = 0;
98 virtual ~OpenGl_SetterInterface() {}
101 //! List of OpenGL shader objects.
102 typedef NCollection_Sequence<Handle(OpenGl_ShaderObject)> OpenGl_ShaderList;
104 //! List of shader variable setters.
105 typedef NCollection_DataMap<size_t, OpenGl_SetterInterface*> OpenGl_SetterList;
107 //! Support tool for setting user-defined uniform variables.
108 class OpenGl_VariableSetterSelector
112 //! Creates new setter selector.
113 OpenGl_VariableSetterSelector();
115 //! Releases memory resources of setter selector.
116 ~OpenGl_VariableSetterSelector();
118 //! Sets user-defined uniform variable to specified program.
119 void Set (const Handle(OpenGl_Context)& theCtx,
120 const Handle(Graphic3d_ShaderVariable)& theVariable,
121 OpenGl_ShaderProgram* theProgram) const;
125 //! List of variable setters.
126 OpenGl_SetterList mySetterList;
129 //! Defines types of uniform state variables.
130 enum OpenGl_UniformStateType
132 OpenGl_LIGHT_SOURCES_STATE,
133 OpenGl_CLIP_PLANES_STATE,
134 OpenGl_MODEL_WORLD_STATE,
135 OpenGl_WORLD_VIEW_STATE,
136 OpenGl_PROJECTION_STATE,
137 OpenGl_MATERIAL_STATE,
138 OpenGl_SURF_DETAIL_STATE,
140 OpenGl_UniformStateType_NB
143 //! Simple class represents GLSL program variable location.
144 class OpenGl_ShaderUniformLocation
147 //! Invalid location of uniform/attribute variable.
148 static const GLint INVALID_LOCATION = -1;
151 //! Construct an invalid location.
152 OpenGl_ShaderUniformLocation() : myLocation (INVALID_LOCATION) {}
154 //! Constructor with initialization.
155 explicit OpenGl_ShaderUniformLocation (GLint theLocation) : myLocation (theLocation) {}
157 //! Note you may safely put invalid location in functions like glUniform* - the data passed in will be silently ignored.
158 //! @return true if location is not equal to -1.
159 bool IsValid() const { return myLocation != INVALID_LOCATION; }
161 //! Return TRUE for non-invalid location.
162 operator bool() const { return myLocation != INVALID_LOCATION; }
164 //! Convert operators help silently put object to GL functions like glUniform*.
165 operator GLint() const { return myLocation; }
171 //! Wrapper for OpenGL program object.
172 class OpenGl_ShaderProgram : public OpenGl_NamedResource
174 friend class OpenGl_View;
175 friend class OpenGl_ShaderManager;
176 DEFINE_STANDARD_RTTIEXT(OpenGl_ShaderProgram, OpenGl_NamedResource)
179 //! Non-valid shader name.
180 static const GLuint NO_PROGRAM = 0;
182 //! Invalid location of uniform/attribute variable.
183 static const GLint INVALID_LOCATION = -1;
185 //! List of pre-defined OCCT state uniform variables.
186 static Standard_CString PredefinedKeywords[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES];
188 //! Wrapper for compiling shader object with verbose printing on error.
189 Standard_EXPORT static bool compileShaderVerbose (const Handle(OpenGl_Context)& theCtx,
190 const Handle(OpenGl_ShaderObject)& theShader,
191 const TCollection_AsciiString& theSource,
192 bool theToPrintSource = true);
194 //! Creates uninitialized shader program.
196 //! WARNING! This constructor is not intended to be called anywhere but from OpenGl_ShaderManager::Create().
197 //! Manager has been designed to synchronize camera position, lights definition and other aspects of the program implicitly,
198 //! as well as sharing same program across rendering groups.
200 //! Program created outside the manager will be left detached from these routines,
201 //! and them should be performed manually by caller.
203 //! This constructor has been made public to provide more flexibility to re-use OCCT OpenGL classes without OCCT Viewer itself.
204 //! If this is not the case - create the program using shared OpenGl_ShaderManager instance instead.
205 Standard_EXPORT OpenGl_ShaderProgram (const Handle(Graphic3d_ShaderProgram)& theProxy = NULL);
209 static OpenGl_VariableSetterSelector mySetterSelector;
213 //! Releases resources of shader program.
214 Standard_EXPORT virtual ~OpenGl_ShaderProgram();
216 //! Creates new empty shader program of specified type.
217 Standard_EXPORT Standard_Boolean Create (const Handle(OpenGl_Context)& theCtx);
219 //! Destroys shader program.
220 Standard_EXPORT virtual void Release (OpenGl_Context* theCtx) Standard_OVERRIDE;
222 //! Returns estimated GPU memory usage - cannot be easily estimated.
223 virtual Standard_Size EstimatedDataSize() const Standard_OVERRIDE { return 0; }
225 //! Attaches shader object to the program object.
226 Standard_EXPORT Standard_Boolean AttachShader (const Handle(OpenGl_Context)& theCtx,
227 const Handle(OpenGl_ShaderObject)& theShader);
229 //! Detaches shader object to the program object.
230 Standard_EXPORT Standard_Boolean DetachShader (const Handle(OpenGl_Context)& theCtx,
231 const Handle(OpenGl_ShaderObject)& theShader);
233 //! Initializes program object with the list of shader objects.
234 Standard_EXPORT Standard_Boolean Initialize (const Handle(OpenGl_Context)& theCtx,
235 const Graphic3d_ShaderObjectList& theShaders);
237 //! Links the program object.
238 //! @param theCtx bound OpenGL context
239 //! @param theIsVerbose flag to print log on error
240 Standard_EXPORT Standard_Boolean Link (const Handle(OpenGl_Context)& theCtx,
241 bool theIsVerbose = true);
243 //! Fetches information log of the last link operation.
244 Standard_EXPORT Standard_Boolean FetchInfoLog (const Handle(OpenGl_Context)& theCtx,
245 TCollection_AsciiString& theLog);
247 //! Fetches uniform variables from proxy shader program.
248 Standard_EXPORT Standard_Boolean ApplyVariables (const Handle(OpenGl_Context)& theCtx);
250 //! @return true if current object was initialized
251 inline bool IsValid() const
253 return myProgramID != NO_PROGRAM;
256 //! @return program ID
257 inline GLuint ProgramId() const
264 //! Return TRUE if program defines tessellation stage.
265 Standard_Boolean HasTessellationStage() const { return myHasTessShader; }
267 //! Return the length of array of light sources (THE_MAX_LIGHTS),
268 //! to be used for initialization occLightSources (OpenGl_OCC_LIGHT_SOURCE_PARAMS).
269 Standard_Integer NbLightsMax() const { return myNbLightsMax; }
271 //! Return the length of array of clipping planes (THE_MAX_CLIP_PLANES),
272 //! to be used for initialization occClipPlaneEquations (OpenGl_OCC_CLIP_PLANE_EQUATIONS) and occClipPlaneChains (OpenGl_OCC_CLIP_PLANE_CHAINS).
273 Standard_Integer NbClipPlanesMax() const { return myNbClipPlanesMax; }
275 //! Return the length of array of Fragment Shader outputs (THE_NB_FRAG_OUTPUTS),
276 //! to be used for initialization occFragColorArray/occFragColorN.
277 Standard_Integer NbFragmentOutputs() const { return myNbFragOutputs; }
279 //! Return true if Fragment Shader should perform alpha test; FALSE by default.
280 Standard_Boolean HasAlphaTest() const { return myHasAlphaTest; }
282 //! Return true if Fragment Shader color should output the weighted OIT coverage; FALSE by default.
283 Standard_Boolean HasWeightOitOutput() const { return myHasWeightOitOutput; }
287 //! Returns index of last modification of variables of specified state type.
288 Standard_Size ActiveState (const OpenGl_UniformStateType theType) const
290 return theType < OpenGl_UniformStateType_NB
291 ? myCurrentState[theType]
295 //! Updates index of last modification of variables of specified state type.
296 void UpdateState (const OpenGl_UniformStateType theType,
297 const Standard_Size theIndex)
299 if (theType < OpenGl_UniformStateType_NB)
301 myCurrentState[theType] = theIndex;
307 //! Returns location of the specific uniform variable.
308 Standard_EXPORT OpenGl_ShaderUniformLocation GetUniformLocation (const Handle(OpenGl_Context)& theCtx,
309 const GLchar* theName) const;
311 //! Returns index of the generic vertex attribute by variable name.
312 Standard_EXPORT GLint GetAttributeLocation (const Handle(OpenGl_Context)& theCtx,
313 const GLchar* theName) const;
315 //! Returns location of the OCCT state uniform variable.
316 const OpenGl_ShaderUniformLocation& GetStateLocation (OpenGl_StateVariable theVariable) const { return myStateLocations[theVariable]; }
320 //! Returns the value of the integer uniform variable.
321 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
322 const GLchar* theName,
323 OpenGl_Vec4i& theValue) const;
325 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
327 OpenGl_Vec4i& theValue) const;
329 //! Returns the value of the float uniform variable.
330 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
331 const GLchar* theName,
332 OpenGl_Vec4& theValue) const;
334 //! Returns the value of the float uniform variable.
335 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
337 OpenGl_Vec4& theValue) const;
341 //! Returns the integer vertex attribute.
342 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
343 const GLchar* theName,
344 OpenGl_Vec4i& theValue) const;
346 //! Returns the integer vertex attribute.
347 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
349 OpenGl_Vec4i& theValue) const;
351 //! Returns the float vertex attribute.
352 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
353 const GLchar* theName,
354 OpenGl_Vec4& theValue) const;
356 //! Returns the float vertex attribute.
357 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
359 OpenGl_Vec4& theValue) const;
363 //! Wrapper for glBindAttribLocation()
364 Standard_EXPORT Standard_Boolean SetAttributeName (const Handle(OpenGl_Context)& theCtx,
366 const GLchar* theName);
368 //! Wrapper for glVertexAttrib1f()
369 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
370 const GLchar* theName,
373 //! Wrapper for glVertexAttrib1f()
374 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
378 //! Wrapper for glVertexAttrib2fv()
379 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
380 const GLchar* theName,
381 const OpenGl_Vec2& theValue);
383 //! Wrapper for glVertexAttrib2fv()
384 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
386 const OpenGl_Vec2& theValue);
388 //! Wrapper for glVertexAttrib3fv()
389 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
390 const GLchar* theName,
391 const OpenGl_Vec3& theValue);
393 //! Wrapper for glVertexAttrib3fv()
394 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
396 const OpenGl_Vec3& theValue);
398 //! Wrapper for glVertexAttrib4fv()
399 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
400 const GLchar* theName,
401 const OpenGl_Vec4& theValue);
403 //! Wrapper for glVertexAttrib4fv()
404 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
406 const OpenGl_Vec4& theValue);
410 //! Specifies the value of the integer uniform variable.
411 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
412 const GLchar* theName,
415 //! Specifies the value of the integer uniform variable.
416 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
420 //! Specifies the value of the integer uniform 2D vector.
421 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
422 const GLchar* theName,
423 const OpenGl_Vec2i& theValue);
425 //! Specifies the value of the integer uniform 2D vector.
426 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
428 const OpenGl_Vec2i& theValue);
430 //! Specifies the value of the integer uniform 3D vector.
431 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
432 const GLchar* theName,
433 const OpenGl_Vec3i& theValue);
435 //! Specifies the value of the integer uniform 3D vector.
436 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
438 const OpenGl_Vec3i& theValue);
440 //! Specifies the value of the integer uniform 4D vector.
441 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
442 const GLchar* theName,
443 const OpenGl_Vec4i& theValue);
445 //! Specifies the value of the integer uniform 4D vector.
446 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
448 const OpenGl_Vec4i& theValue);
452 //! Specifies the value of the unsigned integer uniform 2D vector (uvec2).
453 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
454 const GLchar* theName,
455 const OpenGl_Vec2u& theValue);
457 //! Specifies the value of the unsigned integer uniform 2D vector (uvec2).
458 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
460 const OpenGl_Vec2u& theValue);
462 //! Specifies the value of the uvec2 uniform array
463 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
464 const GLchar* theName,
465 const GLsizei theCount,
466 const OpenGl_Vec2u* theValue);
468 //! Specifies the value of the uvec2 uniform array
469 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
471 const GLsizei theCount,
472 const OpenGl_Vec2u* theValue);
476 //! Specifies the value of the float uniform variable.
477 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
478 const GLchar* theName,
481 //! Specifies the value of the float uniform variable.
482 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
486 //! Specifies the value of the float uniform 2D vector.
487 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
488 const GLchar* theName,
489 const OpenGl_Vec2& theValue);
491 //! Specifies the value of the float uniform 2D vector.
492 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
494 const OpenGl_Vec2& theValue);
496 //! Specifies the value of the float uniform 3D vector.
497 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
498 const GLchar* theName,
499 const OpenGl_Vec3& theValue);
501 //! Specifies the value of the float uniform 3D vector.
502 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
504 const OpenGl_Vec3& theValue);
506 //! Specifies the value of the float uniform 4D vector.
507 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
508 const GLchar* theName,
509 const OpenGl_Vec4& theValue);
511 //! Specifies the value of the float uniform 4D vector.
512 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
514 const OpenGl_Vec4& theValue);
518 //! Specifies the value of the float uniform 4x4 matrix.
519 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
520 const GLchar* theName,
521 const OpenGl_Mat4& theValue,
522 GLboolean theTranspose = GL_FALSE);
524 //! Specifies the value of the float uniform 4x4 matrix.
525 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
527 const OpenGl_Mat4& theValue,
528 GLboolean theTranspose = GL_FALSE);
530 //! Specifies the value of the float uniform 4x4 matrix.
531 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
532 const GLchar* theName,
533 const OpenGl_Matrix& theValue,
534 GLboolean theTranspose = GL_FALSE);
536 //! Specifies the value of the float uniform 4x4 matrix.
537 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
539 const OpenGl_Matrix& theValue,
540 GLboolean theTranspose = GL_FALSE);
542 //! Specifies the value of the float uniform array
543 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
546 const Standard_ShortReal* theData);
548 //! Specifies the value of the float2 uniform array
549 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
552 const OpenGl_Vec2* theData);
554 //! Specifies the value of the float3 uniform array
555 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
558 const OpenGl_Vec3* theData);
560 //! Specifies the value of the float4 uniform array
561 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
564 const OpenGl_Vec4* theData);
566 //! Specifies the value of the integer uniform array
567 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
570 const Standard_Integer* theData);
572 //! Specifies the value of the int2 uniform array
573 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
576 const OpenGl_Vec2i* theData);
578 //! Specifies the value of the int3 uniform array
579 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
582 const OpenGl_Vec3i* theData);
584 //! Specifies the value of the int4 uniform array
585 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
588 const OpenGl_Vec4i* theData);
592 //! Specifies the value of the sampler uniform variable.
593 Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx,
594 const GLchar* theName,
595 const Graphic3d_TextureUnit theTextureUnit);
597 //! Specifies the value of the sampler uniform variable.
598 Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx,
600 const Graphic3d_TextureUnit theTextureUnit);
604 //! Increments counter of users.
605 //! Used by OpenGl_ShaderManager.
606 //! @return true when resource has been restored from delayed release queue
609 return ++myShareCount == 1;
612 //! Decrements counter of users.
613 //! Used by OpenGl_ShaderManager.
614 //! @return true when there are no more users of this program has been left
617 return --myShareCount == 0;
620 //! Links the program object.
621 Standard_EXPORT Standard_Boolean link (const Handle(OpenGl_Context)& theCtx);
625 GLuint myProgramID; //!< Handle of OpenGL shader program
626 OpenGl_ShaderList myShaderObjects; //!< List of attached shader objects
627 Handle(Graphic3d_ShaderProgram) myProxy; //!< Proxy shader program (from application layer)
628 Standard_Integer myShareCount; //!< program users count, initialized with 1 (already shared by one user)
629 Standard_Integer myNbLightsMax; //!< length of array of light sources (THE_MAX_LIGHTS)
630 Standard_Integer myNbClipPlanesMax; //!< length of array of clipping planes (THE_MAX_CLIP_PLANES)
631 Standard_Integer myNbFragOutputs; //!< length of array of Fragment Shader outputs (THE_NB_FRAG_OUTPUTS)
632 Standard_Boolean myHasAlphaTest; //!< flag indicating that Fragment Shader should perform alpha-test
633 Standard_Boolean myHasWeightOitOutput; //!< flag indicating that Fragment Shader includes weighted OIT coverage
634 Standard_Boolean myHasTessShader; //!< flag indicating that program defines tessellation stage
638 Standard_Size myCurrentState[OpenGl_UniformStateType_NB]; //!< defines last modification for variables of each state type
640 //! Stores locations of OCCT state uniform variables.
641 OpenGl_ShaderUniformLocation myStateLocations[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES];
646 struct OpenGl_VariableSetter : public OpenGl_SetterInterface
648 virtual void Set (const Handle(OpenGl_Context)& theCtx,
649 const Handle(Graphic3d_ShaderVariable)& theVariable,
650 OpenGl_ShaderProgram* theProgram)
652 theProgram->SetUniform (theCtx,
653 theVariable->Name().ToCString(),
654 theVariable->Value()->As<T>());
658 namespace OpenGl_HashMapInitializer
660 template<class K, class V>
663 NCollection_DataMap<K, V> myDictionary;
665 MapListOfType (K theKey, V theValue)
667 myDictionary.Bind (theKey, theValue);
670 MapListOfType& operator() (K theKey, V theValue)
672 myDictionary.Bind (theKey, theValue);
676 operator const NCollection_DataMap<K, V>& () const
682 template<class K, class V>
683 MapListOfType<K, V> CreateListOf (K theKey, V theValue)
685 return MapListOfType<K, V> (theKey, theValue);
689 #endif // _OpenGl_ShaderProgram_Header