0027972: Visualization - remove unused and not implemented property V3d_View::EnableG...
[occt.git] / src / OpenGl / OpenGl_ShaderManager.hxx
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30f0ad28 1// Created on: 2013-09-26
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_ShaderManager_HeaderFile
17#define _OpenGl_ShaderManager_HeaderFile
18
494782f6 19#include <Graphic3d_ShaderProgram.hxx>
f978241f 20#include <Graphic3d_StereoMode.hxx>
c357e426 21#include <Graphic3d_TypeOfShadingModel.hxx>
30f0ad28 22
23#include <NCollection_DataMap.hxx>
24#include <NCollection_Sequence.hxx>
25
256f9ac0 26#include <OpenGl_SetOfShaderPrograms.hxx>
30f0ad28 27#include <OpenGl_ShaderStates.hxx>
8625ef7e 28#include <OpenGl_AspectFace.hxx>
29#include <OpenGl_AspectLine.hxx>
30#include <OpenGl_AspectText.hxx>
31#include <OpenGl_AspectMarker.hxx>
32#include <OpenGl_Texture.hxx>
c357e426 33
30f0ad28 34
e6804ff7 35class OpenGl_View;
36
30f0ad28 37//! List of shader programs.
38typedef NCollection_Sequence<Handle(OpenGl_ShaderProgram)> OpenGl_ShaderProgramList;
39
c04c30b3 40class OpenGl_ShaderManager;
41DEFINE_STANDARD_HANDLE(OpenGl_ShaderManager, Standard_Transient)
42
30f0ad28 43//! This class is responsible for managing shader programs.
44class OpenGl_ShaderManager : public Standard_Transient
45{
46 friend class OpenGl_ShaderProgram;
47
48public:
49
50 //! Creates new empty shader manager.
51 Standard_EXPORT OpenGl_ShaderManager (OpenGl_Context* theContext);
52
53 //! Releases resources of shader manager.
54 Standard_EXPORT virtual ~OpenGl_ShaderManager();
55
05e2200b 56 //! Release all resources.
57 Standard_EXPORT void clear();
58
392ac980 59 //! Creates new shader program or re-use shared instance.
60 //! @param theProxy [IN] program definition
61 //! @param theShareKey [OUT] sharing key
62 //! @param theProgram [OUT] OpenGL program
8625ef7e 63 //! @return true on success
64 Standard_EXPORT Standard_Boolean Create (const Handle(Graphic3d_ShaderProgram)& theProxy,
65 TCollection_AsciiString& theShareKey,
66 Handle(OpenGl_ShaderProgram)& theProgram);
30f0ad28 67
68 //! Unregisters specified shader program.
392ac980 69 Standard_EXPORT void Unregister (TCollection_AsciiString& theShareKey,
70 Handle(OpenGl_ShaderProgram)& theProgram);
30f0ad28 71
72 //! Returns list of registered shader programs.
73 Standard_EXPORT const OpenGl_ShaderProgramList& ShaderPrograms() const;
74
75 //! Returns true if no program objects are registered in the manager.
76 Standard_EXPORT Standard_Boolean IsEmpty() const;
77
8625ef7e 78 //! Bind program for filled primitives rendering
299e0ab9 79 Standard_Boolean BindFaceProgram (const Handle(OpenGl_Texture)& theTexture,
80 const Standard_Boolean theToLightOn,
81 const Standard_Boolean theHasVertColor,
82 const Standard_Boolean theEnableEnvMap,
83 const Handle(OpenGl_ShaderProgram)& theCustomProgram)
8625ef7e 84 {
85 if (!theCustomProgram.IsNull()
86 || myContext->caps->ffpEnable)
87 {
299e0ab9 88 return bindProgramWithState (theCustomProgram);
8625ef7e 89 }
90
83da37b1 91 const Standard_Integer aBits = getProgramBits (theTexture, theHasVertColor, theEnableEnvMap);
8625ef7e 92 Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theToLightOn, aBits);
299e0ab9 93 return bindProgramWithState (aProgram);
8625ef7e 94 }
30f0ad28 95
8625ef7e 96 //! Bind program for line rendering
299e0ab9 97 Standard_Boolean BindLineProgram (const Handle(OpenGl_Texture)& theTexture,
98 const Standard_Boolean theStipple,
99 const Standard_Boolean theToLightOn,
100 const Standard_Boolean theHasVertColor,
101 const Handle(OpenGl_ShaderProgram)& theCustomProgram)
8625ef7e 102 {
103 if (!theCustomProgram.IsNull()
104 || myContext->caps->ffpEnable)
105 {
299e0ab9 106 return bindProgramWithState (theCustomProgram);
8625ef7e 107 }
108
ac116c22 109 Standard_Integer aBits = getProgramBits (theTexture, theHasVertColor);
299e0ab9 110 if (theStipple)
ac116c22 111 {
112 aBits |= OpenGl_PO_StippleLine;
113 }
114
8625ef7e 115 Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theToLightOn, aBits);
299e0ab9 116 return bindProgramWithState (aProgram);
8625ef7e 117 }
30f0ad28 118
8625ef7e 119 //! Bind program for point rendering
299e0ab9 120 Standard_Boolean BindMarkerProgram (const Handle(OpenGl_Texture)& theTexture,
121 const Standard_Boolean theToLightOn,
122 const Standard_Boolean theHasVertColor,
123 const Handle(OpenGl_ShaderProgram)& theCustomProgram)
8625ef7e 124 {
125 if (!theCustomProgram.IsNull()
126 || myContext->caps->ffpEnable)
127 {
299e0ab9 128 return bindProgramWithState (theCustomProgram);
8625ef7e 129 }
130
131 const Standard_Integer aBits = getProgramBits (theTexture, theHasVertColor) | OpenGl_PO_Point;
132 Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theToLightOn, aBits);
299e0ab9 133 return bindProgramWithState (aProgram);
8625ef7e 134 }
135
136 //! Bind program for rendering alpha-textured font.
299e0ab9 137 Standard_Boolean BindFontProgram (const Handle(OpenGl_ShaderProgram)& theCustomProgram)
8625ef7e 138 {
139 if (!theCustomProgram.IsNull()
140 || myContext->caps->ffpEnable)
141 {
299e0ab9 142 return bindProgramWithState (theCustomProgram);
8625ef7e 143 }
144
145 if (myFontProgram.IsNull())
146 {
147 prepareStdProgramFont();
148 }
299e0ab9 149
150 return bindProgramWithState (myFontProgram);
8625ef7e 151 }
30f0ad28 152
b86bb3df 153 //! Bind program for FBO blit operation.
154 Standard_Boolean BindFboBlitProgram()
155 {
156 if (myBlitProgram.IsNull())
157 {
158 prepareStdProgramFboBlit();
159 }
160 return !myBlitProgram.IsNull()
161 && myContext->BindProgram (myBlitProgram);
162 }
163
f978241f 164 //! Bind program for rendering stereoscopic image.
165 Standard_Boolean BindStereoProgram (const Graphic3d_StereoMode theStereoMode)
38a0206f 166 {
f978241f 167 if (theStereoMode < 0 || theStereoMode >= Graphic3d_StereoMode_NB)
38a0206f 168 {
f978241f 169 return Standard_False;
38a0206f 170 }
f978241f 171
172 if (myStereoPrograms[theStereoMode].IsNull())
173 {
174 prepareStdProgramStereo (myStereoPrograms[theStereoMode], theStereoMode);
175 }
176 const Handle(OpenGl_ShaderProgram)& aProgram = myStereoPrograms[theStereoMode];
177 return !aProgram.IsNull()
178 && myContext->BindProgram (aProgram);
38a0206f 179 }
180
30f0ad28 181public:
182
183 //! Returns current state of OCCT light sources.
184 Standard_EXPORT const OpenGl_LightSourceState& LightSourceState() const;
185
186 //! Updates state of OCCT light sources.
187 Standard_EXPORT void UpdateLightSourceStateTo (const OpenGl_ListOfLight* theLights);
188
189 //! Pushes current state of OCCT light sources to specified program.
190 Standard_EXPORT void PushLightSourceState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
191
192public:
193
194 //! Returns current state of OCCT projection transform.
195 Standard_EXPORT const OpenGl_ProjectionState& ProjectionState() const;
196
197 //! Updates state of OCCT projection transform.
c827ea3a 198 Standard_EXPORT void UpdateProjectionStateTo (const OpenGl_Mat4& theProjectionMatrix);
30f0ad28 199
30f0ad28 200 //! Pushes current state of OCCT projection transform to specified program.
201 Standard_EXPORT void PushProjectionState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
202
203public:
204
205 //! Returns current state of OCCT model-world transform.
206 Standard_EXPORT const OpenGl_ModelWorldState& ModelWorldState() const;
207
208 //! Updates state of OCCT model-world transform.
c827ea3a 209 Standard_EXPORT void UpdateModelWorldStateTo (const OpenGl_Mat4& theModelWorldMatrix);
30f0ad28 210
30f0ad28 211 //! Pushes current state of OCCT model-world transform to specified program.
212 Standard_EXPORT void PushModelWorldState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
213
214public:
215
216 //! Returns current state of OCCT world-view transform.
217 Standard_EXPORT const OpenGl_WorldViewState& WorldViewState() const;
218
219 //! Updates state of OCCT world-view transform.
c827ea3a 220 Standard_EXPORT void UpdateWorldViewStateTo (const OpenGl_Mat4& theWorldViewMatrix);
30f0ad28 221
30f0ad28 222 //! Pushes current state of OCCT world-view transform to specified program.
223 Standard_EXPORT void PushWorldViewState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
224
225public:
226
227 //! Updates state of OCCT clipping planes.
228 Standard_EXPORT void UpdateClippingState();
229
230 //! Reverts state of OCCT clipping planes.
231 Standard_EXPORT void RevertClippingState();
232
233 //! Pushes current state of OCCT clipping planes to specified program.
234 Standard_EXPORT void PushClippingState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
235
236public:
237
30f0ad28 238 //! Pushes current state of OCCT graphics parameters to specified program.
239 Standard_EXPORT void PushState (const Handle(OpenGl_ShaderProgram)& theProgram) const;
240
392ac980 241public:
242
243 //! Overwrites context
244 void SetContext (OpenGl_Context* theCtx)
245 {
246 myContext = theCtx;
247 }
248
c357e426 249 //! Returns true when provided context is the same as used one by shader manager.
250 bool IsSameContext (OpenGl_Context* theCtx) const
251 {
252 return myContext == theCtx;
253 }
254
8625ef7e 255 //! Sets shading model.
c357e426 256 Standard_EXPORT void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel);
8625ef7e 257
e6804ff7 258 //! Sets last view manger used with.
259 //! Helps to handle matrix states in multi-view configurations.
260 void SetLastView (const OpenGl_View* theLastView)
261 {
262 myLastView = theLastView;
263 }
264
265 //! Returns true when provided view is the same as cached one.
266 bool IsSameView (const OpenGl_View* theView) const
267 {
268 return myLastView == theView;
269 }
270
30f0ad28 271protected:
272
8625ef7e 273 //! Define program bits.
274 Standard_Integer getProgramBits (const Handle(OpenGl_Texture)& theTexture,
e135a155 275 const Standard_Boolean theHasVertColor,
276 const Standard_Boolean theEnableEnvMap = Standard_False)
277
8625ef7e 278 {
279 Standard_Integer aBits = 0;
1a7ece8f 280
281 const Standard_Integer aNbPlanes = myContext->Clipping().NbClippingOrCappingOn();
282 if (aNbPlanes > 0)
8625ef7e 283 {
1a7ece8f 284 aBits |= OpenGl_PO_ClipPlanesN;
285 if (aNbPlanes == 1)
286 {
287 aBits |= OpenGl_PO_ClipPlanes1;
288 }
289 else if (aNbPlanes == 2)
290 {
291 aBits |= OpenGl_PO_ClipPlanes2;
292 }
8625ef7e 293 }
1a7ece8f 294
83da37b1 295 if (theEnableEnvMap)
e135a155 296 {
297 // Environment map overwrites material texture
298 aBits |= OpenGl_PO_TextureEnv;
299 }
300 else if (!theTexture.IsNull())
8625ef7e 301 {
4e1523ef 302 aBits |= theTexture->IsAlpha() ? OpenGl_PO_TextureA : OpenGl_PO_TextureRGB;
8625ef7e 303 }
304 if (theHasVertColor)
305 {
306 aBits |= OpenGl_PO_VertColor;
307 }
308 return aBits;
309 }
310
311 //! Prepare standard GLSL program.
312 Handle(OpenGl_ShaderProgram)& getStdProgram (const Standard_Boolean theToLightOn,
313 const Standard_Integer theBits)
314 {
e135a155 315 // If environment map is enabled lighting calculations are
316 // not needed (in accordance with default OCCT behaviour)
317 if (theToLightOn && (theBits & OpenGl_PO_TextureEnv) == 0)
8625ef7e 318 {
256f9ac0 319 Handle(OpenGl_ShaderProgram)& aProgram = myLightPrograms->ChangeValue (theBits);
8625ef7e 320 if (aProgram.IsNull())
321 {
322 prepareStdProgramLight (aProgram, theBits);
323 }
324 return aProgram;
325 }
326
256f9ac0 327 Handle(OpenGl_ShaderProgram)& aProgram = myFlatPrograms.ChangeValue (theBits);
8625ef7e 328 if (aProgram.IsNull())
329 {
330 prepareStdProgramFlat (aProgram, theBits);
331 }
332 return aProgram;
333 }
334
299e0ab9 335 //! Prepare standard GLSL program for accessing point sprite alpha.
fd59283a 336 Standard_EXPORT TCollection_AsciiString pointSpriteAlphaSrc (const Standard_Integer theBits);
299e0ab9 337
338 //! Prepare standard GLSL program for computing point sprite shading.
339 Standard_EXPORT TCollection_AsciiString pointSpriteShadingSrc (const TCollection_AsciiString theBaseColorSrc, const Standard_Integer theBits);
340
8625ef7e 341 //! Prepare standard GLSL program for textured font.
342 Standard_EXPORT Standard_Boolean prepareStdProgramFont();
343
b86bb3df 344 //! Prepare standard GLSL program for FBO blit operation.
345 Standard_EXPORT Standard_Boolean prepareStdProgramFboBlit();
346
8625ef7e 347 //! Prepare standard GLSL program without lighting.
348 Standard_EXPORT Standard_Boolean prepareStdProgramFlat (Handle(OpenGl_ShaderProgram)& theProgram,
349 const Standard_Integer theBits);
350
351 //! Prepare standard GLSL program with lighting.
352 Standard_Boolean prepareStdProgramLight (Handle(OpenGl_ShaderProgram)& theProgram,
353 const Standard_Integer theBits)
354 {
c357e426 355 return myShadingModel == Graphic3d_TOSM_FRAGMENT
8625ef7e 356 ? prepareStdProgramPhong (theProgram, theBits)
357 : prepareStdProgramGouraud (theProgram, theBits);
358 }
359
360 //! Prepare standard GLSL program with per-vertex lighting.
361 Standard_EXPORT Standard_Boolean prepareStdProgramGouraud (Handle(OpenGl_ShaderProgram)& theProgram,
362 const Standard_Integer theBits);
363
364 //! Prepare standard GLSL program with per-pixel lighting.
365 Standard_EXPORT Standard_Boolean prepareStdProgramPhong (Handle(OpenGl_ShaderProgram)& theProgram,
366 const Standard_Integer theBits);
367
256f9ac0 368 //! Define computeLighting GLSL function depending on current lights configuration
abdf0b10 369 //! @param theHasVertColor flag to use getVertColor() instead of Ambient and Diffuse components of active material
370 Standard_EXPORT TCollection_AsciiString stdComputeLighting (const Standard_Boolean theHasVertColor);
256f9ac0 371
8625ef7e 372 //! Bind specified program to current context and apply state.
299e0ab9 373 Standard_EXPORT Standard_Boolean bindProgramWithState (const Handle(OpenGl_ShaderProgram)& theProgram);
8625ef7e 374
256f9ac0 375 //! Set pointer myLightPrograms to active lighting programs set from myMapOfLightPrograms
376 Standard_EXPORT void switchLightPrograms();
377
f978241f 378 //! Prepare standard GLSL program for stereoscopic image.
379 Standard_EXPORT Standard_Boolean prepareStdProgramStereo (Handle(OpenGl_ShaderProgram)& theProgram,
380 const Graphic3d_StereoMode theStereoMode);
38a0206f 381
8625ef7e 382protected:
383
c357e426 384 Graphic3d_TypeOfShadingModel myShadingModel; //!< lighting shading model
256f9ac0 385 OpenGl_ShaderProgramList myProgramList; //!< The list of shader programs
386 Handle(OpenGl_SetOfShaderPrograms) myLightPrograms; //!< pointer to active lighting programs matrix
387 OpenGl_SetOfShaderPrograms myFlatPrograms; //!< programs matrix without lighting
388 Handle(OpenGl_ShaderProgram) myFontProgram; //!< standard program for textured text
b86bb3df 389 Handle(OpenGl_ShaderProgram) myBlitProgram; //!< standard program for FBO blit emulation
256f9ac0 390 OpenGl_MapOfShaderPrograms myMapOfLightPrograms; //!< map of lighting programs depending on shading model and lights configuration
8625ef7e 391
f978241f 392 Handle(OpenGl_ShaderProgram) myStereoPrograms[Graphic3d_StereoMode_NB]; //!< standard stereo programs
38a0206f 393
256f9ac0 394 OpenGl_Context* myContext; //!< OpenGL context
8625ef7e 395
396protected:
397
256f9ac0 398 OpenGl_ProjectionState myProjectionState; //!< State of OCCT projection transformation
399 OpenGl_ModelWorldState myModelWorldState; //!< State of OCCT model-world transformation
400 OpenGl_WorldViewState myWorldViewState; //!< State of OCCT world-view transformation
8cf06aa2 401 OpenGl_ClippingState myClippingState; //!< State of OCCT clipping planes
256f9ac0 402 OpenGl_LightSourceState myLightSourceState; //!< State of OCCT light sources
30f0ad28 403
404private:
405
256f9ac0 406 const OpenGl_View* myLastView; //!< Pointer to the last view shader manager used with
8625ef7e 407
408public:
409
92efcf78 410 DEFINE_STANDARD_RTTIEXT(OpenGl_ShaderManager,Standard_Transient)
30f0ad28 411};
412
413#endif // _OpenGl_ShaderManager_HeaderFile