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> |
30f0ad28 |
21 | |
22 | #include <NCollection_DataMap.hxx> |
23 | #include <NCollection_Sequence.hxx> |
24 | |
256f9ac0 |
25 | #include <OpenGl_SetOfShaderPrograms.hxx> |
30f0ad28 |
26 | #include <OpenGl_ShaderStates.hxx> |
bf5f0ca2 |
27 | #include <OpenGl_Aspects.hxx> |
8613985b |
28 | #include <OpenGl_MaterialState.hxx> |
8625ef7e |
29 | #include <OpenGl_Texture.hxx> |
c357e426 |
30 | |
e6804ff7 |
31 | class OpenGl_View; |
98b15dbf |
32 | class OpenGl_VertexBuffer; |
e6804ff7 |
33 | |
30f0ad28 |
34 | //! List of shader programs. |
35 | typedef NCollection_Sequence<Handle(OpenGl_ShaderProgram)> OpenGl_ShaderProgramList; |
36 | |
30f0ad28 |
37 | //! This class is responsible for managing shader programs. |
38 | class OpenGl_ShaderManager : public Standard_Transient |
39 | { |
8613985b |
40 | DEFINE_STANDARD_RTTIEXT(OpenGl_ShaderManager, Standard_Transient) |
30f0ad28 |
41 | friend class OpenGl_ShaderProgram; |
30f0ad28 |
42 | public: |
43 | |
44 | //! Creates new empty shader manager. |
45 | Standard_EXPORT OpenGl_ShaderManager (OpenGl_Context* theContext); |
46 | |
47 | //! Releases resources of shader manager. |
48 | Standard_EXPORT virtual ~OpenGl_ShaderManager(); |
49 | |
05e2200b |
50 | //! Release all resources. |
51 | Standard_EXPORT void clear(); |
52 | |
7c3ef2f7 |
53 | //! Return local camera transformation. |
54 | const gp_XYZ& LocalOrigin() const { return myLocalOrigin; } |
55 | |
56 | //! Setup local camera transformation for compensating float precision issues. |
57 | void SetLocalOrigin (const gp_XYZ& theOrigin) |
58 | { |
59 | myLocalOrigin = theOrigin; |
60 | myHasLocalOrigin = !theOrigin.IsEqual (gp_XYZ(0.0, 0.0, 0.0), gp::Resolution()); |
61 | } |
62 | |
392ac980 |
63 | //! Creates new shader program or re-use shared instance. |
64 | //! @param theProxy [IN] program definition |
65 | //! @param theShareKey [OUT] sharing key |
66 | //! @param theProgram [OUT] OpenGL program |
8625ef7e |
67 | //! @return true on success |
68 | Standard_EXPORT Standard_Boolean Create (const Handle(Graphic3d_ShaderProgram)& theProxy, |
69 | TCollection_AsciiString& theShareKey, |
70 | Handle(OpenGl_ShaderProgram)& theProgram); |
30f0ad28 |
71 | |
72 | //! Unregisters specified shader program. |
392ac980 |
73 | Standard_EXPORT void Unregister (TCollection_AsciiString& theShareKey, |
74 | Handle(OpenGl_ShaderProgram)& theProgram); |
30f0ad28 |
75 | |
76 | //! Returns list of registered shader programs. |
77 | Standard_EXPORT const OpenGl_ShaderProgramList& ShaderPrograms() const; |
78 | |
79 | //! Returns true if no program objects are registered in the manager. |
80 | Standard_EXPORT Standard_Boolean IsEmpty() const; |
81 | |
8625ef7e |
82 | //! Bind program for filled primitives rendering |
cc8cbabe |
83 | Standard_Boolean BindFaceProgram (const Handle(OpenGl_TextureSet)& theTextures, |
2a332745 |
84 | Graphic3d_TypeOfShadingModel theShadingModel, |
85 | Graphic3d_AlphaMode theAlphaMode, |
86 | Standard_Boolean theHasVertColor, |
87 | Standard_Boolean theEnableEnvMap, |
88 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
89 | { |
6ef0d6f1 |
90 | return BindFaceProgram (theTextures, theShadingModel, theAlphaMode, Aspect_IS_SOLID, |
91 | theHasVertColor, theEnableEnvMap, false, theCustomProgram); |
2a332745 |
92 | } |
93 | |
94 | //! Bind program for filled primitives rendering |
95 | Standard_Boolean BindFaceProgram (const Handle(OpenGl_TextureSet)& theTextures, |
96 | Graphic3d_TypeOfShadingModel theShadingModel, |
97 | Graphic3d_AlphaMode theAlphaMode, |
98 | Aspect_InteriorStyle theInteriorStyle, |
99 | Standard_Boolean theHasVertColor, |
100 | Standard_Boolean theEnableEnvMap, |
101 | Standard_Boolean theEnableMeshEdges, |
299e0ab9 |
102 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
103 | { |
104 | if (!theCustomProgram.IsNull() |
105 | || myContext->caps->ffpEnable) |
106 | { |
299e0ab9 |
107 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
108 | } |
109 | |
dc89236f |
110 | const Graphic3d_TypeOfShadingModel aShadeModelOnFace = theShadingModel != Graphic3d_TOSM_UNLIT |
111 | && (theTextures.IsNull() || theTextures->IsModulate()) |
112 | ? theShadingModel |
113 | : Graphic3d_TOSM_UNLIT; |
2a332745 |
114 | const Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, theInteriorStyle, theHasVertColor, theEnableEnvMap, theEnableMeshEdges); |
dc89236f |
115 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (aShadeModelOnFace, aBits); |
299e0ab9 |
116 | return bindProgramWithState (aProgram); |
8625ef7e |
117 | } |
30f0ad28 |
118 | |
8625ef7e |
119 | //! Bind program for line rendering |
cc8cbabe |
120 | Standard_Boolean BindLineProgram (const Handle(OpenGl_TextureSet)& theTextures, |
dc89236f |
121 | const Aspect_TypeOfLine theLineType, |
122 | const Graphic3d_TypeOfShadingModel theShadingModel, |
c40eb6b9 |
123 | const Graphic3d_AlphaMode theAlphaMode, |
299e0ab9 |
124 | const Standard_Boolean theHasVertColor, |
125 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
126 | { |
127 | if (!theCustomProgram.IsNull() |
128 | || myContext->caps->ffpEnable) |
129 | { |
299e0ab9 |
130 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
131 | } |
132 | |
2a332745 |
133 | Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, Aspect_IS_SOLID, theHasVertColor, false, false); |
dc89236f |
134 | if (theLineType != Aspect_TOL_SOLID) |
ac116c22 |
135 | { |
136 | aBits |= OpenGl_PO_StippleLine; |
137 | } |
138 | |
dc89236f |
139 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theShadingModel, aBits); |
299e0ab9 |
140 | return bindProgramWithState (aProgram); |
8625ef7e |
141 | } |
30f0ad28 |
142 | |
8625ef7e |
143 | //! Bind program for point rendering |
cc8cbabe |
144 | Standard_Boolean BindMarkerProgram (const Handle(OpenGl_TextureSet)& theTextures, |
dc89236f |
145 | const Graphic3d_TypeOfShadingModel theShadingModel, |
c40eb6b9 |
146 | const Graphic3d_AlphaMode theAlphaMode, |
299e0ab9 |
147 | const Standard_Boolean theHasVertColor, |
148 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
149 | { |
150 | if (!theCustomProgram.IsNull() |
151 | || myContext->caps->ffpEnable) |
152 | { |
299e0ab9 |
153 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
154 | } |
155 | |
2a332745 |
156 | const Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, Aspect_IS_SOLID, theHasVertColor, false, false) | OpenGl_PO_Point; |
dc89236f |
157 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theShadingModel, aBits); |
299e0ab9 |
158 | return bindProgramWithState (aProgram); |
8625ef7e |
159 | } |
160 | |
161 | //! Bind program for rendering alpha-textured font. |
299e0ab9 |
162 | Standard_Boolean BindFontProgram (const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
163 | { |
164 | if (!theCustomProgram.IsNull() |
165 | || myContext->caps->ffpEnable) |
166 | { |
299e0ab9 |
167 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
168 | } |
169 | |
170 | if (myFontProgram.IsNull()) |
171 | { |
172 | prepareStdProgramFont(); |
173 | } |
299e0ab9 |
174 | |
175 | return bindProgramWithState (myFontProgram); |
8625ef7e |
176 | } |
30f0ad28 |
177 | |
6ef0d6f1 |
178 | //! Bind program for outline rendering |
179 | Standard_Boolean BindOutlineProgram() |
180 | { |
181 | if (myContext->caps->ffpEnable) |
182 | { |
183 | return false; |
184 | } |
185 | |
186 | const Standard_Integer aBits = getProgramBits (Handle(OpenGl_TextureSet)(), Graphic3d_AlphaMode_Opaque, Aspect_IS_SOLID, false, false, false); |
187 | if (myOutlinePrograms.IsNull()) |
188 | { |
189 | myOutlinePrograms = new OpenGl_SetOfPrograms(); |
190 | } |
191 | Handle(OpenGl_ShaderProgram)& aProgram = myOutlinePrograms->ChangeValue (aBits); |
192 | if (aProgram.IsNull()) |
193 | { |
194 | prepareStdProgramUnlit (aProgram, aBits, true); |
195 | } |
196 | return bindProgramWithState (aProgram); |
197 | } |
198 | |
b86bb3df |
199 | //! Bind program for FBO blit operation. |
200 | Standard_Boolean BindFboBlitProgram() |
201 | { |
202 | if (myBlitProgram.IsNull()) |
203 | { |
204 | prepareStdProgramFboBlit(); |
205 | } |
206 | return !myBlitProgram.IsNull() |
207 | && myContext->BindProgram (myBlitProgram); |
208 | } |
209 | |
a1073ae2 |
210 | //! Bind program for blended order-independent transparency buffers compositing. |
211 | Standard_Boolean BindOitCompositingProgram (const Standard_Boolean theIsMSAAEnabled) |
212 | { |
213 | const Standard_Integer aProgramIdx = theIsMSAAEnabled ? 1 : 0; |
214 | if (myOitCompositingProgram[aProgramIdx].IsNull()) |
215 | { |
216 | prepareStdProgramOitCompositing (theIsMSAAEnabled); |
217 | } |
218 | |
219 | const Handle(OpenGl_ShaderProgram)& aProgram = myOitCompositingProgram [aProgramIdx]; |
220 | return !aProgram.IsNull() && myContext->BindProgram (aProgram); |
221 | } |
222 | |
f978241f |
223 | //! Bind program for rendering stereoscopic image. |
224 | Standard_Boolean BindStereoProgram (const Graphic3d_StereoMode theStereoMode) |
38a0206f |
225 | { |
f978241f |
226 | if (theStereoMode < 0 || theStereoMode >= Graphic3d_StereoMode_NB) |
38a0206f |
227 | { |
f978241f |
228 | return Standard_False; |
38a0206f |
229 | } |
f978241f |
230 | |
231 | if (myStereoPrograms[theStereoMode].IsNull()) |
232 | { |
233 | prepareStdProgramStereo (myStereoPrograms[theStereoMode], theStereoMode); |
234 | } |
235 | const Handle(OpenGl_ShaderProgram)& aProgram = myStereoPrograms[theStereoMode]; |
236 | return !aProgram.IsNull() |
237 | && myContext->BindProgram (aProgram); |
38a0206f |
238 | } |
239 | |
98b15dbf |
240 | //! Bind program for rendering bounding box. |
241 | Standard_Boolean BindBoundBoxProgram() |
242 | { |
243 | if (myBoundBoxProgram.IsNull()) |
244 | { |
245 | prepareStdProgramBoundBox(); |
246 | } |
247 | return bindProgramWithState (myBoundBoxProgram); |
248 | } |
249 | |
250 | //! Returns bounding box vertex buffer. |
251 | const Handle(OpenGl_VertexBuffer)& BoundBoxVertBuffer() const { return myBoundBoxVertBuffer; } |
252 | |
30f0ad28 |
253 | public: |
254 | |
255 | //! Returns current state of OCCT light sources. |
8613985b |
256 | const OpenGl_LightSourceState& LightSourceState() const { return myLightSourceState; } |
30f0ad28 |
257 | |
258 | //! Updates state of OCCT light sources. |
992ed6b3 |
259 | Standard_EXPORT void UpdateLightSourceStateTo (const Handle(Graphic3d_LightSet)& theLights); |
30f0ad28 |
260 | |
7c3ef2f7 |
261 | //! Invalidate state of OCCT light sources. |
262 | Standard_EXPORT void UpdateLightSourceState(); |
263 | |
30f0ad28 |
264 | //! Pushes current state of OCCT light sources to specified program. |
265 | Standard_EXPORT void PushLightSourceState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
266 | |
267 | public: |
268 | |
269 | //! Returns current state of OCCT projection transform. |
8613985b |
270 | const OpenGl_ProjectionState& ProjectionState() const { return myProjectionState; } |
30f0ad28 |
271 | |
272 | //! Updates state of OCCT projection transform. |
c827ea3a |
273 | Standard_EXPORT void UpdateProjectionStateTo (const OpenGl_Mat4& theProjectionMatrix); |
30f0ad28 |
274 | |
30f0ad28 |
275 | //! Pushes current state of OCCT projection transform to specified program. |
276 | Standard_EXPORT void PushProjectionState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
277 | |
278 | public: |
279 | |
280 | //! Returns current state of OCCT model-world transform. |
8613985b |
281 | const OpenGl_ModelWorldState& ModelWorldState() const { return myModelWorldState; } |
30f0ad28 |
282 | |
283 | //! Updates state of OCCT model-world transform. |
c827ea3a |
284 | Standard_EXPORT void UpdateModelWorldStateTo (const OpenGl_Mat4& theModelWorldMatrix); |
30f0ad28 |
285 | |
30f0ad28 |
286 | //! Pushes current state of OCCT model-world transform to specified program. |
287 | Standard_EXPORT void PushModelWorldState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
288 | |
289 | public: |
290 | |
291 | //! Returns current state of OCCT world-view transform. |
8613985b |
292 | const OpenGl_WorldViewState& WorldViewState() const { return myWorldViewState; } |
30f0ad28 |
293 | |
294 | //! Updates state of OCCT world-view transform. |
c827ea3a |
295 | Standard_EXPORT void UpdateWorldViewStateTo (const OpenGl_Mat4& theWorldViewMatrix); |
30f0ad28 |
296 | |
30f0ad28 |
297 | //! Pushes current state of OCCT world-view transform to specified program. |
298 | Standard_EXPORT void PushWorldViewState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
299 | |
300 | public: |
301 | |
302 | //! Updates state of OCCT clipping planes. |
303 | Standard_EXPORT void UpdateClippingState(); |
304 | |
305 | //! Reverts state of OCCT clipping planes. |
306 | Standard_EXPORT void RevertClippingState(); |
307 | |
308 | //! Pushes current state of OCCT clipping planes to specified program. |
309 | Standard_EXPORT void PushClippingState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
310 | |
8613985b |
311 | public: |
312 | |
313 | //! Returns current state of material. |
314 | const OpenGl_MaterialState& MaterialState() const { return myMaterialState; } |
315 | |
316 | //! Updates state of material. |
317 | void UpdateMaterialStateTo (const OpenGl_Material& theFrontMat, |
318 | const OpenGl_Material& theBackMat, |
c40eb6b9 |
319 | const float theAlphaCutoff, |
8613985b |
320 | const bool theToDistinguish, |
321 | const bool theToMapTexture) |
322 | { |
c40eb6b9 |
323 | myMaterialState.Set (theFrontMat, theBackMat, theAlphaCutoff, theToDistinguish, theToMapTexture); |
8613985b |
324 | myMaterialState.Update(); |
325 | } |
326 | |
327 | //! Updates state of material. |
328 | void UpdateMaterialState() |
329 | { |
330 | myMaterialState.Update(); |
331 | } |
332 | |
333 | //! Pushes current state of material to specified program. |
334 | void PushMaterialState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
335 | |
2a332745 |
336 | public: |
337 | |
338 | //! Setup interior style line edges variables. |
339 | Standard_EXPORT void PushInteriorState (const Handle(OpenGl_ShaderProgram)& theProgram, |
bf5f0ca2 |
340 | const Handle(Graphic3d_Aspects)& theAspect) const; |
2a332745 |
341 | |
a1073ae2 |
342 | public: |
343 | |
726b5d9e |
344 | //! Returns state of OIT uniforms. |
345 | const OpenGl_OitState& OitState() const { return myOitState; } |
346 | |
a1073ae2 |
347 | //! Set the state of OIT rendering pass. |
348 | //! @param theToEnableOitWrite [in] flag indicating whether the special output should be written for OIT algorithm. |
349 | //! @param theDepthFactor [in] the scalar factor of depth influence to the fragment's coverage. |
350 | void SetOitState (const bool theToEnableOitWrite, const float theDepthFactor) |
351 | { |
352 | myOitState.Set (theToEnableOitWrite, theDepthFactor); |
353 | myOitState.Update(); |
354 | } |
355 | |
356 | //! Pushes state of OIT uniforms to the specified program. |
357 | Standard_EXPORT void PushOitState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
358 | |
30f0ad28 |
359 | public: |
05e2200b |
360 | |
30f0ad28 |
361 | //! Pushes current state of OCCT graphics parameters to specified program. |
362 | Standard_EXPORT void PushState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
363 | |
392ac980 |
364 | public: |
365 | |
366 | //! Overwrites context |
367 | void SetContext (OpenGl_Context* theCtx) |
368 | { |
369 | myContext = theCtx; |
370 | } |
371 | |
c357e426 |
372 | //! Returns true when provided context is the same as used one by shader manager. |
373 | bool IsSameContext (OpenGl_Context* theCtx) const |
374 | { |
375 | return myContext == theCtx; |
376 | } |
377 | |
db5d29de |
378 | //! Choose Shading Model for filled primitives. |
379 | //! Fallbacks to FACET model if there are no normal attributes. |
380 | Graphic3d_TypeOfShadingModel ChooseFaceShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
381 | bool theHasNodalNormals) const |
dc89236f |
382 | { |
383 | if (!myContext->ColorMask()) |
384 | { |
385 | return Graphic3d_TOSM_UNLIT; |
386 | } |
387 | Graphic3d_TypeOfShadingModel aModel = theCustomModel != Graphic3d_TOSM_DEFAULT ? theCustomModel : myShadingModel; |
388 | switch (aModel) |
389 | { |
390 | case Graphic3d_TOSM_DEFAULT: |
391 | case Graphic3d_TOSM_UNLIT: |
392 | case Graphic3d_TOSM_FACET: |
db5d29de |
393 | return aModel; |
dc89236f |
394 | case Graphic3d_TOSM_VERTEX: |
395 | case Graphic3d_TOSM_FRAGMENT: |
db5d29de |
396 | return theHasNodalNormals ? aModel : Graphic3d_TOSM_FACET; |
dc89236f |
397 | } |
db5d29de |
398 | return Graphic3d_TOSM_UNLIT; |
399 | } |
400 | |
401 | //! Choose Shading Model for line primitives. |
402 | //! Fallbacks to UNLIT model if there are no normal attributes. |
403 | Graphic3d_TypeOfShadingModel ChooseLineShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
404 | bool theHasNodalNormals) const |
405 | { |
406 | if (!myContext->ColorMask()) |
407 | { |
408 | return Graphic3d_TOSM_UNLIT; |
409 | } |
410 | Graphic3d_TypeOfShadingModel aModel = theCustomModel != Graphic3d_TOSM_DEFAULT ? theCustomModel : myShadingModel; |
411 | switch (aModel) |
412 | { |
413 | case Graphic3d_TOSM_DEFAULT: |
414 | case Graphic3d_TOSM_UNLIT: |
415 | case Graphic3d_TOSM_FACET: |
416 | return Graphic3d_TOSM_UNLIT; |
417 | case Graphic3d_TOSM_VERTEX: |
418 | case Graphic3d_TOSM_FRAGMENT: |
419 | return theHasNodalNormals ? aModel : Graphic3d_TOSM_UNLIT; |
420 | } |
421 | return Graphic3d_TOSM_UNLIT; |
422 | } |
423 | |
424 | //! Choose Shading Model for Marker primitives. |
425 | Graphic3d_TypeOfShadingModel ChooseMarkerShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
426 | bool theHasNodalNormals) const |
427 | { |
428 | return ChooseLineShadingModel (theCustomModel, theHasNodalNormals); |
dc89236f |
429 | } |
430 | |
431 | //! Returns default Shading Model. |
432 | Graphic3d_TypeOfShadingModel ShadingModel() const { return myShadingModel; } |
433 | |
8625ef7e |
434 | //! Sets shading model. |
c357e426 |
435 | Standard_EXPORT void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel); |
8625ef7e |
436 | |
e6804ff7 |
437 | //! Sets last view manger used with. |
438 | //! Helps to handle matrix states in multi-view configurations. |
439 | void SetLastView (const OpenGl_View* theLastView) |
440 | { |
441 | myLastView = theLastView; |
442 | } |
443 | |
444 | //! Returns true when provided view is the same as cached one. |
445 | bool IsSameView (const OpenGl_View* theView) const |
446 | { |
447 | return myLastView == theView; |
448 | } |
449 | |
30f0ad28 |
450 | protected: |
451 | |
2a332745 |
452 | //! Define clipping planes program bits. |
453 | Standard_Integer getClipPlaneBits() const |
454 | { |
455 | const Standard_Integer aNbPlanes = myContext->Clipping().NbClippingOrCappingOn(); |
456 | if (aNbPlanes <= 0) |
457 | { |
458 | return 0; |
459 | } |
460 | |
461 | Standard_Integer aBits = 0; |
462 | if (myContext->Clipping().HasClippingChains()) |
463 | { |
464 | aBits |= OpenGl_PO_ClipChains; |
465 | } |
466 | |
467 | if (aNbPlanes == 1) |
468 | { |
469 | aBits |= OpenGl_PO_ClipPlanes1; |
470 | } |
471 | else if (aNbPlanes == 2) |
472 | { |
473 | aBits |= OpenGl_PO_ClipPlanes2; |
474 | } |
475 | else |
476 | { |
477 | aBits |= OpenGl_PO_ClipPlanesN; |
478 | } |
479 | return aBits; |
480 | } |
481 | |
8625ef7e |
482 | //! Define program bits. |
cc8cbabe |
483 | Standard_Integer getProgramBits (const Handle(OpenGl_TextureSet)& theTextures, |
c40eb6b9 |
484 | Graphic3d_AlphaMode theAlphaMode, |
2a332745 |
485 | Aspect_InteriorStyle theInteriorStyle, |
c40eb6b9 |
486 | Standard_Boolean theHasVertColor, |
2a332745 |
487 | Standard_Boolean theEnableEnvMap, |
488 | Standard_Boolean theEnableMeshEdges) const |
8625ef7e |
489 | { |
490 | Standard_Integer aBits = 0; |
c40eb6b9 |
491 | if (theAlphaMode == Graphic3d_AlphaMode_Mask) |
492 | { |
493 | aBits |= OpenGl_PO_AlphaTest; |
494 | } |
1a7ece8f |
495 | |
2a332745 |
496 | aBits |= getClipPlaneBits(); |
497 | if (theEnableMeshEdges |
498 | && myContext->hasGeometryStage != OpenGl_FeatureNotAvailable) |
8625ef7e |
499 | { |
2a332745 |
500 | aBits |= OpenGl_PO_MeshEdges; |
501 | if (theInteriorStyle == Aspect_IS_HOLLOW) |
1a7ece8f |
502 | { |
2a332745 |
503 | aBits |= OpenGl_PO_AlphaTest; |
1a7ece8f |
504 | } |
8625ef7e |
505 | } |
1a7ece8f |
506 | |
83da37b1 |
507 | if (theEnableEnvMap) |
e135a155 |
508 | { |
509 | // Environment map overwrites material texture |
510 | aBits |= OpenGl_PO_TextureEnv; |
511 | } |
cc8cbabe |
512 | else if (!theTextures.IsNull() |
513 | && !theTextures->IsEmpty() |
514 | && !theTextures->First().IsNull()) |
8625ef7e |
515 | { |
cc8cbabe |
516 | aBits |= theTextures->First()->IsAlpha() ? OpenGl_PO_TextureA : OpenGl_PO_TextureRGB; |
8625ef7e |
517 | } |
2a332745 |
518 | if (theHasVertColor |
519 | && theInteriorStyle != Aspect_IS_HIDDENLINE) |
8625ef7e |
520 | { |
521 | aBits |= OpenGl_PO_VertColor; |
522 | } |
a1073ae2 |
523 | |
524 | if (myOitState.ToEnableWrite()) |
525 | { |
526 | aBits |= OpenGl_PO_WriteOit; |
527 | } |
8625ef7e |
528 | return aBits; |
529 | } |
530 | |
531 | //! Prepare standard GLSL program. |
dc89236f |
532 | Handle(OpenGl_ShaderProgram)& getStdProgram (Graphic3d_TypeOfShadingModel theShadingModel, |
533 | Standard_Integer theBits) |
8625ef7e |
534 | { |
dc89236f |
535 | if (theShadingModel == Graphic3d_TOSM_UNLIT |
536 | || (theBits & OpenGl_PO_TextureEnv) != 0) |
8625ef7e |
537 | { |
dc89236f |
538 | // If environment map is enabled lighting calculations are |
539 | // not needed (in accordance with default OCCT behavior) |
6ef0d6f1 |
540 | Handle(OpenGl_ShaderProgram)& aProgram = myUnlitPrograms->ChangeValue (theBits); |
8625ef7e |
541 | if (aProgram.IsNull()) |
542 | { |
6ef0d6f1 |
543 | prepareStdProgramUnlit (aProgram, theBits, false); |
8625ef7e |
544 | } |
545 | return aProgram; |
546 | } |
547 | |
dc89236f |
548 | Handle(OpenGl_ShaderProgram)& aProgram = myLightPrograms->ChangeValue (theShadingModel, theBits); |
8625ef7e |
549 | if (aProgram.IsNull()) |
550 | { |
dc89236f |
551 | prepareStdProgramLight (aProgram, theShadingModel, theBits); |
8625ef7e |
552 | } |
553 | return aProgram; |
554 | } |
555 | |
299e0ab9 |
556 | //! Prepare standard GLSL program for accessing point sprite alpha. |
fd59283a |
557 | Standard_EXPORT TCollection_AsciiString pointSpriteAlphaSrc (const Standard_Integer theBits); |
299e0ab9 |
558 | |
559 | //! Prepare standard GLSL program for computing point sprite shading. |
560 | Standard_EXPORT TCollection_AsciiString pointSpriteShadingSrc (const TCollection_AsciiString theBaseColorSrc, const Standard_Integer theBits); |
561 | |
8625ef7e |
562 | //! Prepare standard GLSL program for textured font. |
563 | Standard_EXPORT Standard_Boolean prepareStdProgramFont(); |
564 | |
b86bb3df |
565 | //! Prepare standard GLSL program for FBO blit operation. |
566 | Standard_EXPORT Standard_Boolean prepareStdProgramFboBlit(); |
567 | |
a1073ae2 |
568 | //! Prepare standard GLSL programs for OIT compositing operation. |
569 | Standard_EXPORT Standard_Boolean prepareStdProgramOitCompositing (const Standard_Boolean theMsaa); |
570 | |
8625ef7e |
571 | //! Prepare standard GLSL program without lighting. |
dc89236f |
572 | Standard_EXPORT Standard_Boolean prepareStdProgramUnlit (Handle(OpenGl_ShaderProgram)& theProgram, |
6ef0d6f1 |
573 | Standard_Integer theBits, |
574 | Standard_Boolean theIsOutline = false); |
8625ef7e |
575 | |
576 | //! Prepare standard GLSL program with lighting. |
577 | Standard_Boolean prepareStdProgramLight (Handle(OpenGl_ShaderProgram)& theProgram, |
dc89236f |
578 | Graphic3d_TypeOfShadingModel theShadingModel, |
579 | Standard_Integer theBits) |
8625ef7e |
580 | { |
dc89236f |
581 | switch (theShadingModel) |
8c3237d4 |
582 | { |
6ef0d6f1 |
583 | case Graphic3d_TOSM_UNLIT: return prepareStdProgramUnlit (theProgram, theBits, false); |
8c3237d4 |
584 | case Graphic3d_TOSM_FACET: return prepareStdProgramPhong (theProgram, theBits, true); |
585 | case Graphic3d_TOSM_VERTEX: return prepareStdProgramGouraud(theProgram, theBits); |
dc89236f |
586 | case Graphic3d_TOSM_DEFAULT: |
8c3237d4 |
587 | case Graphic3d_TOSM_FRAGMENT: return prepareStdProgramPhong (theProgram, theBits, false); |
588 | } |
589 | return false; |
8625ef7e |
590 | } |
591 | |
592 | //! Prepare standard GLSL program with per-vertex lighting. |
593 | Standard_EXPORT Standard_Boolean prepareStdProgramGouraud (Handle(OpenGl_ShaderProgram)& theProgram, |
594 | const Standard_Integer theBits); |
595 | |
596 | //! Prepare standard GLSL program with per-pixel lighting. |
8c3237d4 |
597 | //! @param theIsFlatNormal when TRUE, the Vertex normals will be ignored and Face normal will be computed instead |
8625ef7e |
598 | Standard_EXPORT Standard_Boolean prepareStdProgramPhong (Handle(OpenGl_ShaderProgram)& theProgram, |
8c3237d4 |
599 | const Standard_Integer theBits, |
600 | const Standard_Boolean theIsFlatNormal = false); |
8625ef7e |
601 | |
256f9ac0 |
602 | //! Define computeLighting GLSL function depending on current lights configuration |
daf73ab7 |
603 | //! @param theNbLights [out] number of defined light sources |
604 | //! @param theHasVertColor [in] flag to use getVertColor() instead of Ambient and Diffuse components of active material |
605 | Standard_EXPORT TCollection_AsciiString stdComputeLighting (Standard_Integer& theNbLights, |
606 | Standard_Boolean theHasVertColor); |
256f9ac0 |
607 | |
8625ef7e |
608 | //! Bind specified program to current context and apply state. |
299e0ab9 |
609 | Standard_EXPORT Standard_Boolean bindProgramWithState (const Handle(OpenGl_ShaderProgram)& theProgram); |
8625ef7e |
610 | |
256f9ac0 |
611 | //! Set pointer myLightPrograms to active lighting programs set from myMapOfLightPrograms |
612 | Standard_EXPORT void switchLightPrograms(); |
613 | |
f978241f |
614 | //! Prepare standard GLSL program for stereoscopic image. |
615 | Standard_EXPORT Standard_Boolean prepareStdProgramStereo (Handle(OpenGl_ShaderProgram)& theProgram, |
616 | const Graphic3d_StereoMode theStereoMode); |
38a0206f |
617 | |
98b15dbf |
618 | //! Prepare standard GLSL program for bounding box. |
619 | Standard_EXPORT Standard_Boolean prepareStdProgramBoundBox(); |
620 | |
2a332745 |
621 | //! Prepare GLSL version header. |
622 | Standard_EXPORT Standard_Integer defaultGlslVersion (const Handle(Graphic3d_ShaderProgram)& theProgram, |
d95f5ce1 |
623 | const TCollection_AsciiString& theName, |
2a332745 |
624 | Standard_Integer theBits, |
625 | bool theUsesDerivates = false) const; |
626 | |
627 | //! Prepare GLSL source for geometry shader according to parameters. |
628 | Standard_EXPORT TCollection_AsciiString prepareGeomMainSrc (OpenGl_ShaderObject::ShaderVariableList& theUnifoms, |
629 | OpenGl_ShaderObject::ShaderVariableList& theStageInOuts, |
630 | Standard_Integer theBits); |
631 | |
7c3ef2f7 |
632 | protected: |
633 | |
634 | //! Packed properties of light source |
635 | struct OpenGl_ShaderLightParameters |
636 | { |
637 | OpenGl_Vec4 Color; |
638 | OpenGl_Vec4 Position; |
639 | OpenGl_Vec4 Direction; |
640 | OpenGl_Vec4 Parameters; |
641 | |
642 | //! Returns packed (serialized) representation of light source properties |
643 | const OpenGl_Vec4* Packed() const { return reinterpret_cast<const OpenGl_Vec4*> (this); } |
644 | static Standard_Integer NbOfVec4() { return 4; } |
645 | }; |
646 | |
647 | //! Packed light source type information |
648 | struct OpenGl_ShaderLightType |
649 | { |
650 | Standard_Integer Type; |
651 | Standard_Integer IsHeadlight; |
652 | |
653 | //! Returns packed (serialized) representation of light source type |
654 | const OpenGl_Vec2i* Packed() const { return reinterpret_cast<const OpenGl_Vec2i*> (this); } |
655 | static Standard_Integer NbOfVec2i() { return 1; } |
656 | }; |
657 | |
8613985b |
658 | //! Fake OpenGL program for tracking FFP state in the way consistent to programmable pipeline. |
659 | class OpenGl_ShaderProgramFFP : public OpenGl_ShaderProgram |
660 | { |
661 | DEFINE_STANDARD_RTTI_INLINE(OpenGl_ShaderProgramFFP, OpenGl_ShaderProgram) |
662 | friend class OpenGl_ShaderManager; |
663 | protected: |
664 | OpenGl_ShaderProgramFFP() {} |
665 | }; |
666 | |
25c35042 |
667 | protected: |
668 | |
669 | //! Append clipping plane definition to temporary buffers. |
670 | void addClippingPlane (Standard_Integer& thePlaneId, |
671 | const Graphic3d_ClipPlane& thePlane, |
672 | const Graphic3d_Vec4d& theEq, |
673 | const Standard_Integer theChainFwd) const |
674 | { |
675 | myClipChainArray.SetValue (thePlaneId, theChainFwd); |
676 | OpenGl_Vec4& aPlaneEq = myClipPlaneArray.ChangeValue (thePlaneId); |
677 | aPlaneEq.x() = float(theEq.x()); |
678 | aPlaneEq.y() = float(theEq.y()); |
679 | aPlaneEq.z() = float(theEq.z()); |
680 | aPlaneEq.w() = float(theEq.w()); |
681 | if (myHasLocalOrigin) |
682 | { |
683 | const gp_XYZ aPos = thePlane.ToPlane().Position().Location().XYZ() - myLocalOrigin; |
684 | const Standard_Real aD = -(theEq.x() * aPos.X() + theEq.y() * aPos.Y() + theEq.z() * aPos.Z()); |
685 | aPlaneEq.w() = float(aD); |
686 | } |
687 | ++thePlaneId; |
688 | } |
689 | |
8625ef7e |
690 | protected: |
691 | |
8613985b |
692 | Handle(OpenGl_ShaderProgramFFP) myFfpProgram; |
693 | |
c357e426 |
694 | Graphic3d_TypeOfShadingModel myShadingModel; //!< lighting shading model |
256f9ac0 |
695 | OpenGl_ShaderProgramList myProgramList; //!< The list of shader programs |
696 | Handle(OpenGl_SetOfShaderPrograms) myLightPrograms; //!< pointer to active lighting programs matrix |
6ef0d6f1 |
697 | Handle(OpenGl_SetOfPrograms) myUnlitPrograms; //!< programs matrix without lighting |
698 | Handle(OpenGl_SetOfPrograms) myOutlinePrograms; //!< programs matrix without lighting for outline presentation |
256f9ac0 |
699 | Handle(OpenGl_ShaderProgram) myFontProgram; //!< standard program for textured text |
b86bb3df |
700 | Handle(OpenGl_ShaderProgram) myBlitProgram; //!< standard program for FBO blit emulation |
98b15dbf |
701 | Handle(OpenGl_ShaderProgram) myBoundBoxProgram; //!< standard program for bounding box |
a1073ae2 |
702 | Handle(OpenGl_ShaderProgram) myOitCompositingProgram[2]; //!< standard program for OIT compositing (default and MSAA). |
dc89236f |
703 | OpenGl_MapOfShaderPrograms myMapOfLightPrograms; //!< map of lighting programs depending on lights configuration |
8625ef7e |
704 | |
f978241f |
705 | Handle(OpenGl_ShaderProgram) myStereoPrograms[Graphic3d_StereoMode_NB]; //!< standard stereo programs |
38a0206f |
706 | |
98b15dbf |
707 | Handle(OpenGl_VertexBuffer) myBoundBoxVertBuffer; //!< bounding box vertex buffer |
708 | |
256f9ac0 |
709 | OpenGl_Context* myContext; //!< OpenGL context |
8625ef7e |
710 | |
711 | protected: |
712 | |
256f9ac0 |
713 | OpenGl_ProjectionState myProjectionState; //!< State of OCCT projection transformation |
714 | OpenGl_ModelWorldState myModelWorldState; //!< State of OCCT model-world transformation |
715 | OpenGl_WorldViewState myWorldViewState; //!< State of OCCT world-view transformation |
8cf06aa2 |
716 | OpenGl_ClippingState myClippingState; //!< State of OCCT clipping planes |
256f9ac0 |
717 | OpenGl_LightSourceState myLightSourceState; //!< State of OCCT light sources |
8613985b |
718 | OpenGl_MaterialState myMaterialState; //!< State of Front and Back materials |
a1073ae2 |
719 | OpenGl_OitState myOitState; //!< State of OIT uniforms |
8613985b |
720 | |
7c3ef2f7 |
721 | gp_XYZ myLocalOrigin; //!< local camera transformation |
722 | Standard_Boolean myHasLocalOrigin; //!< flag indicating that local camera transformation has been set |
723 | |
daf73ab7 |
724 | mutable NCollection_Array1<OpenGl_ShaderLightType> myLightTypeArray; |
725 | mutable NCollection_Array1<OpenGl_ShaderLightParameters> myLightParamsArray; |
726 | mutable NCollection_Array1<OpenGl_Vec4> myClipPlaneArray; |
727 | mutable NCollection_Array1<OpenGl_Vec4d> myClipPlaneArrayFfp; |
25c35042 |
728 | mutable NCollection_Array1<Standard_Integer> myClipChainArray; |
30f0ad28 |
729 | |
730 | private: |
731 | |
256f9ac0 |
732 | const OpenGl_View* myLastView; //!< Pointer to the last view shader manager used with |
8625ef7e |
733 | |
30f0ad28 |
734 | }; |
735 | |
8613985b |
736 | DEFINE_STANDARD_HANDLE(OpenGl_ShaderManager, Standard_Transient) |
737 | |
30f0ad28 |
738 | #endif // _OpenGl_ShaderManager_HeaderFile |