0029337: Visualization, TKOpenGl - visual artifacts on Intel Broadwell GPU
[occt.git] / src / OpenGl / OpenGl_ShaderProgram.hxx
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30f0ad28 1// Created on: 2013-09-19
2// Created by: Denis BOGOLEPOV
d5f74e42 3// Copyright (c) 2013-2014 OPEN CASCADE SAS
30f0ad28 4//
973c2be1 5// This file is part of Open CASCADE Technology software library.
30f0ad28 6//
d5f74e42 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
973c2be1 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.
30f0ad28 12//
973c2be1 13// Alternatively, this file may be used under the terms of Open CASCADE
14// commercial license or contractual agreement.
30f0ad28 15
16#ifndef _OpenGl_ShaderProgram_Header
17#define _OpenGl_ShaderProgram_Header
18
19#include <NCollection_DataMap.hxx>
20#include <NCollection_Sequence.hxx>
21#include <TCollection_AsciiString.hxx>
22
23#include <Graphic3d_ShaderObject.hxx>
24#include <Graphic3d_ShaderProgram.hxx>
25
30f0ad28 26#include <OpenGl_Vec.hxx>
27#include <OpenGl_Matrix.hxx>
cc8cbabe 28#include <OpenGl_NamedResource.hxx>
30f0ad28 29#include <OpenGl_ShaderObject.hxx>
30f0ad28 30
c04c30b3 31class OpenGl_ShaderProgram;
cc8cbabe 32DEFINE_STANDARD_HANDLE(OpenGl_ShaderProgram, OpenGl_NamedResource)
c04c30b3 33
30f0ad28 34//! The enumeration of OCCT-specific OpenGL/GLSL variables.
35enum OpenGl_StateVariable
36{
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,
50
51 // OpenGL clip planes state
12381341 52 OpenGl_OCC_CLIP_PLANE_EQUATIONS,
5495fa7e 53 OpenGl_OCC_CLIP_PLANE_COUNT,
30f0ad28 54
55 // OpenGL light state
12381341 56 OpenGl_OCC_LIGHT_SOURCE_COUNT,
57 OpenGl_OCC_LIGHT_SOURCE_TYPES,
58 OpenGl_OCC_LIGHT_SOURCE_PARAMS,
59 OpenGl_OCC_LIGHT_AMBIENT,
30f0ad28 60
61 // Material state
30f0ad28 62 OpenGl_OCCT_TEXTURE_ENABLE,
63 OpenGl_OCCT_DISTINGUISH_MODE,
12381341 64 OpenGl_OCCT_FRONT_MATERIAL,
65 OpenGl_OCCT_BACK_MATERIAL,
8625ef7e 66 OpenGl_OCCT_COLOR,
67
a1073ae2 68 // Weighted, Blended Order-Independent Transparency rendering state
69 OpenGl_OCCT_OIT_OUTPUT,
70 OpenGl_OCCT_OIT_DEPTH_FACTOR,
71
72 // Context-dependent state
79f4f036 73 OpenGl_OCCT_TEXTURE_TRSF2D,
8625ef7e 74 OpenGl_OCCT_POINT_SIZE,
30f0ad28 75
76 // DON'T MODIFY THIS ITEM (insert new items before it)
77 OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES
78};
79
30f0ad28 80//! Interface for generic setter of user-defined uniform variables.
81struct OpenGl_SetterInterface
82{
83 //! Sets user-defined uniform variable to specified program.
84 virtual void Set (const Handle(OpenGl_Context)& theCtx,
85 const Handle(Graphic3d_ShaderVariable)& theVariable,
86 OpenGl_ShaderProgram* theProgram) = 0;
87
88 //! Destructor
89 virtual ~OpenGl_SetterInterface() {}
90};
91
92//! List of OpenGL shader objects.
93typedef NCollection_Sequence<Handle(OpenGl_ShaderObject)> OpenGl_ShaderList;
94
95//! List of shader variable setters.
96typedef NCollection_DataMap<size_t, OpenGl_SetterInterface*> OpenGl_SetterList;
97
98//! Support tool for setting user-defined uniform variables.
99class OpenGl_VariableSetterSelector
100{
101public:
102
103 //! Creates new setter selector.
104 OpenGl_VariableSetterSelector();
105
106 //! Releases memory resources of setter selector.
107 ~OpenGl_VariableSetterSelector();
108
109 //! Sets user-defined uniform variable to specified program.
110 void Set (const Handle(OpenGl_Context)& theCtx,
111 const Handle(Graphic3d_ShaderVariable)& theVariable,
112 OpenGl_ShaderProgram* theProgram) const;
113
114private:
115
116 //! List of variable setters.
117 OpenGl_SetterList mySetterList;
118};
119
120//! Defines types of uniform state variables.
121enum OpenGl_UniformStateType
122{
123 OpenGl_LIGHT_SOURCES_STATE,
124 OpenGl_CLIP_PLANES_STATE,
125 OpenGl_MODEL_WORLD_STATE,
126 OpenGl_WORLD_VIEW_STATE,
127 OpenGl_PROJECTION_STATE,
8613985b 128 OpenGl_MATERIAL_STATE,
129 OpenGl_SURF_DETAIL_STATE,
a1073ae2 130 OpenGL_OIT_STATE,
8613985b 131 OpenGl_UniformStateType_NB
30f0ad28 132};
133
30f0ad28 134//! Wrapper for OpenGL program object.
cc8cbabe 135class OpenGl_ShaderProgram : public OpenGl_NamedResource
30f0ad28 136{
91c60b57 137 friend class OpenGl_View;
cc8cbabe 138 friend class OpenGl_ShaderManager;
139 DEFINE_STANDARD_RTTIEXT(OpenGl_ShaderProgram, OpenGl_NamedResource)
30f0ad28 140public:
141
142 //! Non-valid shader name.
143 static const GLuint NO_PROGRAM = 0;
144
145 //! Invalid location of uniform/attribute variable.
146 static const GLint INVALID_LOCATION = -1;
147
148 //! List of pre-defined OCCT state uniform variables.
149 static Standard_CString PredefinedKeywords[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES];
150
30f0ad28 151 //! Creates uninitialized shader program.
5440a790 152 //!
153 //! WARNING! This constructor is not intended to be called anywhere but from OpenGl_ShaderManager::Create().
154 //! Manager has been designed to synchronize camera position, lights definition and other aspects of the program implicitly,
155 //! as well as sharing same program across rendering groups.
156 //!
157 //! Program created outside the manager will be left detached from these routines,
158 //! and them should be performed manually by caller.
159 //!
160 //! This constructor has been made public to provide more flexibility to re-use OCCT OpenGL classes without OCCT Viewer itself.
161 //! If this is not the case - create the program using shared OpenGl_ShaderManager instance instead.
30f0ad28 162 Standard_EXPORT OpenGl_ShaderProgram (const Handle(Graphic3d_ShaderProgram)& theProxy = NULL);
163
5440a790 164protected:
165
30f0ad28 166 static OpenGl_VariableSetterSelector mySetterSelector;
167
168public:
169
170 //! Releases resources of shader program.
171 Standard_EXPORT virtual ~OpenGl_ShaderProgram();
172
173 //! Creates new empty shader program of specified type.
174 Standard_EXPORT Standard_Boolean Create (const Handle(OpenGl_Context)& theCtx);
175
176 //! Destroys shader program.
79104795 177 Standard_EXPORT virtual void Release (OpenGl_Context* theCtx) Standard_OVERRIDE;
30f0ad28 178
15669413 179 //! Returns estimated GPU memory usage - cannot be easily estimated.
180 virtual Standard_Size EstimatedDataSize() const Standard_OVERRIDE { return 0; }
181
30f0ad28 182 //! Attaches shader object to the program object.
183 Standard_EXPORT Standard_Boolean AttachShader (const Handle(OpenGl_Context)& theCtx,
184 const Handle(OpenGl_ShaderObject)& theShader);
185
186 //! Detaches shader object to the program object.
187 Standard_EXPORT Standard_Boolean DetachShader (const Handle(OpenGl_Context)& theCtx,
188 const Handle(OpenGl_ShaderObject)& theShader);
189
190 //! Initializes program object with the list of shader objects.
191 Standard_EXPORT Standard_Boolean Initialize (const Handle(OpenGl_Context)& theCtx,
192 const Graphic3d_ShaderObjectList& theShaders);
193
194 //! Links the program object.
195 Standard_EXPORT Standard_Boolean Link (const Handle(OpenGl_Context)& theCtx);
196
197 //! Fetches information log of the last link operation.
198 Standard_EXPORT Standard_Boolean FetchInfoLog (const Handle(OpenGl_Context)& theCtx,
199 TCollection_AsciiString& theLog);
200
201 //! Fetches uniform variables from proxy shader program.
202 Standard_EXPORT Standard_Boolean ApplyVariables (const Handle(OpenGl_Context)& theCtx);
203
12381341 204 //! @return true if current object was initialized
205 inline bool IsValid() const
206 {
207 return myProgramID != NO_PROGRAM;
208 }
209
7d3e64ef 210 //! @return program ID
211 inline GLuint ProgramId() const
212 {
213 return myProgramID;
214 }
215
daf73ab7 216public:
217
8e0a2b19 218 //! Return TRUE if program defines tessellation stage.
219 Standard_Boolean HasTessellationStage() const { return myHasTessShader; }
220
daf73ab7 221 //! Return the length of array of light sources (THE_MAX_LIGHTS),
222 //! to be used for initialization occLightSources (OpenGl_OCC_LIGHT_SOURCE_PARAMS).
223 Standard_Integer NbLightsMax() const { return myNbLightsMax; }
224
225 //! Return the length of array of clipping planes (THE_MAX_CLIP_PLANES),
226 //! to be used for initialization occClipPlaneEquations (OpenGl_OCC_CLIP_PLANE_EQUATIONS).
227 Standard_Integer NbClipPlanesMax() const { return myNbClipPlanesMax; }
228
b17e5bae 229 //! Return the length of array of Fragment Shader outputs (THE_NB_FRAG_OUTPUTS),
230 //! to be used for initialization occFragColorArray/occFragColorN.
231 Standard_Integer NbFragmentOutputs() const { return myNbFragOutputs; }
232
233 //! Return true if Fragment Shader color should output the weighted OIT coverage; FALSE by default.
234 Standard_Boolean HasWeightOitOutput() const { return myHasWeightOitOutput; }
235
30f0ad28 236private:
237
238 //! Returns index of last modification of variables of specified state type.
8613985b 239 Standard_Size ActiveState (const OpenGl_UniformStateType theType) const
240 {
241 return theType < OpenGl_UniformStateType_NB
242 ? myCurrentState[theType]
243 : 0;
244 }
30f0ad28 245
246 //! Updates index of last modification of variables of specified state type.
8613985b 247 void UpdateState (const OpenGl_UniformStateType theType,
248 const Standard_Size theIndex)
249 {
250 if (theType < OpenGl_UniformStateType_NB)
251 {
252 myCurrentState[theType] = theIndex;
253 }
254 }
30f0ad28 255
256public:
257
258 //! Returns location of the specific uniform variable.
259 Standard_EXPORT GLint GetUniformLocation (const Handle(OpenGl_Context)& theCtx,
260 const GLchar* theName) const;
261
262 //! Returns index of the generic vertex attribute by variable name.
263 Standard_EXPORT GLint GetAttributeLocation (const Handle(OpenGl_Context)& theCtx,
264 const GLchar* theName) const;
265
266 //! Returns location of the OCCT state uniform variable.
267 Standard_EXPORT GLint GetStateLocation (const GLuint theVariable) const;
268
269public:
270
271 //! Returns the value of the integer uniform variable.
272 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
273 const GLchar* theName,
274 OpenGl_Vec4i& theValue) const;
275
276 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
277 GLint theLocation,
278 OpenGl_Vec4i& theValue) const;
279
280 //! Returns the value of the float uniform variable.
281 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
282 const GLchar* theName,
283 OpenGl_Vec4& theValue) const;
284
285 //! Returns the value of the float uniform variable.
286 Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx,
287 GLint theLocation,
288 OpenGl_Vec4& theValue) const;
289
290public:
291
292 //! Returns the integer vertex attribute.
293 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
294 const GLchar* theName,
295 OpenGl_Vec4i& theValue) const;
296
297 //! Returns the integer vertex attribute.
298 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
299 GLint theIndex,
300 OpenGl_Vec4i& theValue) const;
301
302 //! Returns the float vertex attribute.
303 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
304 const GLchar* theName,
305 OpenGl_Vec4& theValue) const;
306
307 //! Returns the float vertex attribute.
308 Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx,
309 GLint theIndex,
310 OpenGl_Vec4& theValue) const;
311
312public:
313
fc73a202 314 //! Wrapper for glBindAttribLocation()
315 Standard_EXPORT Standard_Boolean SetAttributeName (const Handle(OpenGl_Context)& theCtx,
316 GLint theIndex,
317 const GLchar* theName);
318
319 //! Wrapper for glVertexAttrib1f()
320 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
321 const GLchar* theName,
322 GLfloat theValue);
323
324 //! Wrapper for glVertexAttrib1f()
325 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
326 GLint theIndex,
327 GLfloat theValue);
328
329 //! Wrapper for glVertexAttrib2fv()
330 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
331 const GLchar* theName,
332 const OpenGl_Vec2& theValue);
333
334 //! Wrapper for glVertexAttrib2fv()
335 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
336 GLint theIndex,
337 const OpenGl_Vec2& theValue);
338
339 //! Wrapper for glVertexAttrib3fv()
340 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
341 const GLchar* theName,
342 const OpenGl_Vec3& theValue);
343
344 //! Wrapper for glVertexAttrib3fv()
345 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
346 GLint theIndex,
347 const OpenGl_Vec3& theValue);
348
349 //! Wrapper for glVertexAttrib4fv()
350 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
351 const GLchar* theName,
352 const OpenGl_Vec4& theValue);
353
354 //! Wrapper for glVertexAttrib4fv()
355 Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx,
356 GLint theIndex,
357 const OpenGl_Vec4& theValue);
358
359public:
360
30f0ad28 361 //! Specifies the value of the integer uniform variable.
362 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
363 const GLchar* theName,
364 GLint theValue);
365
366 //! Specifies the value of the integer uniform variable.
367 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
368 GLint theLocation,
369 GLint theValue);
370
371 //! Specifies the value of the integer uniform 2D vector.
372 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
373 const GLchar* theName,
374 const OpenGl_Vec2i& theValue);
375
376 //! Specifies the value of the integer uniform 2D vector.
377 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
378 GLint theLocation,
379 const OpenGl_Vec2i& theValue);
380
381 //! Specifies the value of the integer uniform 3D vector.
382 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
383 const GLchar* theName,
384 const OpenGl_Vec3i& theValue);
385
386 //! Specifies the value of the integer uniform 3D vector.
387 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
388 GLint theLocation,
389 const OpenGl_Vec3i& theValue);
390
391 //! Specifies the value of the integer uniform 4D vector.
392 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
393 const GLchar* theName,
394 const OpenGl_Vec4i& theValue);
395
396 //! Specifies the value of the integer uniform 4D vector.
397 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
398 GLint theLocation,
399 const OpenGl_Vec4i& theValue);
400
401public:
402
47e9c178 403 //! Specifies the value of the unsigned integer uniform 2D vector (uvec2).
25ef750e 404 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
405 const GLchar* theName,
47e9c178 406 const OpenGl_Vec2u& theValue);
25ef750e 407
47e9c178 408 //! Specifies the value of the unsigned integer uniform 2D vector (uvec2).
25ef750e 409 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
410 GLint theLocation,
47e9c178 411 const OpenGl_Vec2u& theValue);
25ef750e 412
47e9c178 413 //! Specifies the value of the uvec2 uniform array
25ef750e 414 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
415 const GLchar* theName,
416 const GLsizei theCount,
47e9c178 417 const OpenGl_Vec2u* theValue);
25ef750e 418
47e9c178 419 //! Specifies the value of the uvec2 uniform array
25ef750e 420 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
421 GLint theLocation,
422 const GLsizei theCount,
47e9c178 423 const OpenGl_Vec2u* theValue);
25ef750e 424
425public:
426
30f0ad28 427 //! Specifies the value of the float uniform variable.
428 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
429 const GLchar* theName,
430 GLfloat theValue);
431
432 //! Specifies the value of the float uniform variable.
433 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
434 GLint theLocation,
435 GLfloat theValue);
436
437 //! Specifies the value of the float uniform 2D vector.
438 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
439 const GLchar* theName,
440 const OpenGl_Vec2& theValue);
441
442 //! Specifies the value of the float uniform 2D vector.
443 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
444 GLint theLocation,
445 const OpenGl_Vec2& theValue);
446
447 //! Specifies the value of the float uniform 3D vector.
448 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
449 const GLchar* theName,
450 const OpenGl_Vec3& theValue);
451
452 //! Specifies the value of the float uniform 3D vector.
453 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
454 GLint theLocation,
455 const OpenGl_Vec3& theValue);
456
457 //! Specifies the value of the float uniform 4D vector.
458 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
459 const GLchar* theName,
460 const OpenGl_Vec4& theValue);
461
462 //! Specifies the value of the float uniform 4D vector.
463 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
464 GLint theLocation,
465 const OpenGl_Vec4& theValue);
466
467public:
468
469 //! Specifies the value of the float uniform 4x4 matrix.
470 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
471 const GLchar* theName,
25ef750e 472 const OpenGl_Mat4& theValue,
473 GLboolean theTranspose = GL_FALSE);
474
475 //! Specifies the value of the float uniform 4x4 matrix.
476 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
477 GLint theLocation,
478 const OpenGl_Mat4& theValue,
479 GLboolean theTranspose = GL_FALSE);
480
481 //! Specifies the value of the float uniform 4x4 matrix.
482 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
483 const GLchar* theName,
30f0ad28 484 const OpenGl_Matrix& theValue,
485 GLboolean theTranspose = GL_FALSE);
486
487 //! Specifies the value of the float uniform 4x4 matrix.
488 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
489 GLint theLocation,
490 const OpenGl_Matrix& theValue,
491 GLboolean theTranspose = GL_FALSE);
492
4fe9ad57 493 //! Specifies the value of the float uniform array
494 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
495 GLint theLocation,
496 GLuint theCount,
497 const Standard_ShortReal* theData);
498
499 //! Specifies the value of the float2 uniform array
500 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
501 GLint theLocation,
502 GLuint theCount,
503 const OpenGl_Vec2* theData);
504
505 //! Specifies the value of the float3 uniform array
506 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
507 GLint theLocation,
508 GLuint theCount,
509 const OpenGl_Vec3* theData);
510
511 //! Specifies the value of the float4 uniform array
512 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
513 GLint theLocation,
514 GLuint theCount,
515 const OpenGl_Vec4* theData);
516
517 //! Specifies the value of the integer uniform array
518 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
519 GLint theLocation,
520 GLuint theCount,
521 const Standard_Integer* theData);
522
523 //! Specifies the value of the int2 uniform array
524 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
525 GLint theLocation,
526 GLuint theCount,
527 const OpenGl_Vec2i* theData);
528
529 //! Specifies the value of the int3 uniform array
530 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
531 GLint theLocation,
532 GLuint theCount,
533 const OpenGl_Vec3i* theData);
534
535 //! Specifies the value of the int4 uniform array
536 Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx,
537 GLint theLocation,
538 GLuint theCount,
539 const OpenGl_Vec4i* theData);
540
30f0ad28 541public:
542
543 //! Specifies the value of the sampler uniform variable.
544 Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx,
545 const GLchar* theName,
cc8cbabe 546 const Graphic3d_TextureUnit theTextureUnit);
30f0ad28 547
548 //! Specifies the value of the sampler uniform variable.
549 Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx,
550 GLint theLocation,
cc8cbabe 551 const Graphic3d_TextureUnit theTextureUnit);
30f0ad28 552
553protected:
554
392ac980 555 //! Increments counter of users.
556 //! Used by OpenGl_ShaderManager.
05dd08ce 557 //! @return true when resource has been restored from delayed release queue
558 bool Share()
392ac980 559 {
05dd08ce 560 return ++myShareCount == 1;
392ac980 561 }
562
563 //! Decrements counter of users.
564 //! Used by OpenGl_ShaderManager.
565 //! @return true when there are no more users of this program has been left
566 bool UnShare()
567 {
568 return --myShareCount == 0;
569 }
570
571protected:
572
573 GLuint myProgramID; //!< Handle of OpenGL shader program
574 OpenGl_ShaderList myShaderObjects; //!< List of attached shader objects
575 Handle(Graphic3d_ShaderProgram) myProxy; //!< Proxy shader program (from application layer)
576 Standard_Integer myShareCount; //!< program users count, initialized with 1 (already shared by one user)
daf73ab7 577 Standard_Integer myNbLightsMax; //!< length of array of light sources (THE_MAX_LIGHTS)
578 Standard_Integer myNbClipPlanesMax; //!< length of array of clipping planes (THE_MAX_CLIP_PLANES)
b17e5bae 579 Standard_Integer myNbFragOutputs; //!< length of array of Fragment Shader outputs (THE_NB_FRAG_OUTPUTS)
580 Standard_Boolean myHasWeightOitOutput; //!< flag indicating that Fragment Shader includes weighted OIT coverage
8e0a2b19 581 Standard_Boolean myHasTessShader; //!< flag indicating that program defines tessellation stage
30f0ad28 582
583protected:
584
8613985b 585 Standard_Size myCurrentState[OpenGl_UniformStateType_NB]; //!< defines last modification for variables of each state type
30f0ad28 586
587 //! Stores locations of OCCT state uniform variables.
588 GLint myStateLocations[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES];
589
30f0ad28 590};
591
592template<class T>
593struct OpenGl_VariableSetter : public OpenGl_SetterInterface
594{
595 virtual void Set (const Handle(OpenGl_Context)& theCtx,
596 const Handle(Graphic3d_ShaderVariable)& theVariable,
597 OpenGl_ShaderProgram* theProgram)
598 {
599 theProgram->SetUniform (theCtx,
600 theVariable->Name().ToCString(),
601 theVariable->Value()->As<T>());
602 }
603};
604
605namespace OpenGl_HashMapInitializer
606{
607 template<class K, class V>
608 struct MapListOfType
609 {
610 NCollection_DataMap<K, V> myDictionary;
611
612 MapListOfType (K theKey, V theValue)
613 {
614 myDictionary.Bind (theKey, theValue);
615 }
616
617 MapListOfType& operator() (K theKey, V theValue)
618 {
619 myDictionary.Bind (theKey, theValue);
620 return *this;
621 }
622
623 operator const NCollection_DataMap<K, V>& () const
624 {
625 return myDictionary;
626 }
627 };
628
629 template<class K, class V>
630 MapListOfType<K, V> CreateListOf (K theKey, V theValue)
631 {
632 return MapListOfType<K, V> (theKey, theValue);
633 }
634}
635
636#endif // _OpenGl_ShaderProgram_Header