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1 | // Created on: 2013-09-26 |
2 | // Created by: Denis BOGOLEPOV |
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3 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
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4 | // |
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5 | // This file is part of Open CASCADE Technology software library. |
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6 | // |
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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. |
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12 | // |
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13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
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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> |
8625ef7e |
27 | #include <OpenGl_AspectFace.hxx> |
28 | #include <OpenGl_AspectLine.hxx> |
29 | #include <OpenGl_AspectText.hxx> |
30 | #include <OpenGl_AspectMarker.hxx> |
8613985b |
31 | #include <OpenGl_MaterialState.hxx> |
8625ef7e |
32 | #include <OpenGl_Texture.hxx> |
c357e426 |
33 | |
e6804ff7 |
34 | class OpenGl_View; |
35 | |
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36 | //! List of shader programs. |
37 | typedef NCollection_Sequence<Handle(OpenGl_ShaderProgram)> OpenGl_ShaderProgramList; |
38 | |
30f0ad28 |
39 | //! This class is responsible for managing shader programs. |
40 | class OpenGl_ShaderManager : public Standard_Transient |
41 | { |
8613985b |
42 | DEFINE_STANDARD_RTTIEXT(OpenGl_ShaderManager, Standard_Transient) |
30f0ad28 |
43 | friend class OpenGl_ShaderProgram; |
30f0ad28 |
44 | public: |
45 | |
46 | //! Creates new empty shader manager. |
47 | Standard_EXPORT OpenGl_ShaderManager (OpenGl_Context* theContext); |
48 | |
49 | //! Releases resources of shader manager. |
50 | Standard_EXPORT virtual ~OpenGl_ShaderManager(); |
51 | |
05e2200b |
52 | //! Release all resources. |
53 | Standard_EXPORT void clear(); |
54 | |
7c3ef2f7 |
55 | //! Return local camera transformation. |
56 | const gp_XYZ& LocalOrigin() const { return myLocalOrigin; } |
57 | |
58 | //! Setup local camera transformation for compensating float precision issues. |
59 | void SetLocalOrigin (const gp_XYZ& theOrigin) |
60 | { |
61 | myLocalOrigin = theOrigin; |
62 | myHasLocalOrigin = !theOrigin.IsEqual (gp_XYZ(0.0, 0.0, 0.0), gp::Resolution()); |
63 | } |
64 | |
392ac980 |
65 | //! Creates new shader program or re-use shared instance. |
66 | //! @param theProxy [IN] program definition |
67 | //! @param theShareKey [OUT] sharing key |
68 | //! @param theProgram [OUT] OpenGL program |
8625ef7e |
69 | //! @return true on success |
70 | Standard_EXPORT Standard_Boolean Create (const Handle(Graphic3d_ShaderProgram)& theProxy, |
71 | TCollection_AsciiString& theShareKey, |
72 | Handle(OpenGl_ShaderProgram)& theProgram); |
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73 | |
74 | //! Unregisters specified shader program. |
392ac980 |
75 | Standard_EXPORT void Unregister (TCollection_AsciiString& theShareKey, |
76 | Handle(OpenGl_ShaderProgram)& theProgram); |
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77 | |
78 | //! Returns list of registered shader programs. |
79 | Standard_EXPORT const OpenGl_ShaderProgramList& ShaderPrograms() const; |
80 | |
81 | //! Returns true if no program objects are registered in the manager. |
82 | Standard_EXPORT Standard_Boolean IsEmpty() const; |
83 | |
8625ef7e |
84 | //! Bind program for filled primitives rendering |
cc8cbabe |
85 | Standard_Boolean BindFaceProgram (const Handle(OpenGl_TextureSet)& theTextures, |
dc89236f |
86 | const Graphic3d_TypeOfShadingModel theShadingModel, |
c40eb6b9 |
87 | const Graphic3d_AlphaMode theAlphaMode, |
299e0ab9 |
88 | const Standard_Boolean theHasVertColor, |
89 | const Standard_Boolean theEnableEnvMap, |
90 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
91 | { |
92 | if (!theCustomProgram.IsNull() |
93 | || myContext->caps->ffpEnable) |
94 | { |
299e0ab9 |
95 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
96 | } |
97 | |
dc89236f |
98 | const Graphic3d_TypeOfShadingModel aShadeModelOnFace = theShadingModel != Graphic3d_TOSM_UNLIT |
99 | && (theTextures.IsNull() || theTextures->IsModulate()) |
100 | ? theShadingModel |
101 | : Graphic3d_TOSM_UNLIT; |
c40eb6b9 |
102 | const Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, theHasVertColor, theEnableEnvMap); |
dc89236f |
103 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (aShadeModelOnFace, aBits); |
299e0ab9 |
104 | return bindProgramWithState (aProgram); |
8625ef7e |
105 | } |
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106 | |
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107 | //! Bind program for line rendering |
cc8cbabe |
108 | Standard_Boolean BindLineProgram (const Handle(OpenGl_TextureSet)& theTextures, |
dc89236f |
109 | const Aspect_TypeOfLine theLineType, |
110 | const Graphic3d_TypeOfShadingModel theShadingModel, |
c40eb6b9 |
111 | const Graphic3d_AlphaMode theAlphaMode, |
299e0ab9 |
112 | const Standard_Boolean theHasVertColor, |
113 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
114 | { |
115 | if (!theCustomProgram.IsNull() |
116 | || myContext->caps->ffpEnable) |
117 | { |
299e0ab9 |
118 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
119 | } |
120 | |
c40eb6b9 |
121 | Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, theHasVertColor, false); |
dc89236f |
122 | if (theLineType != Aspect_TOL_SOLID) |
ac116c22 |
123 | { |
124 | aBits |= OpenGl_PO_StippleLine; |
125 | } |
126 | |
dc89236f |
127 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theShadingModel, aBits); |
299e0ab9 |
128 | return bindProgramWithState (aProgram); |
8625ef7e |
129 | } |
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130 | |
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131 | //! Bind program for point rendering |
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132 | Standard_Boolean BindMarkerProgram (const Handle(OpenGl_TextureSet)& theTextures, |
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133 | const Graphic3d_TypeOfShadingModel theShadingModel, |
c40eb6b9 |
134 | const Graphic3d_AlphaMode theAlphaMode, |
299e0ab9 |
135 | const Standard_Boolean theHasVertColor, |
136 | const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
137 | { |
138 | if (!theCustomProgram.IsNull() |
139 | || myContext->caps->ffpEnable) |
140 | { |
299e0ab9 |
141 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
142 | } |
143 | |
c40eb6b9 |
144 | const Standard_Integer aBits = getProgramBits (theTextures, theAlphaMode, theHasVertColor, false) | OpenGl_PO_Point; |
dc89236f |
145 | Handle(OpenGl_ShaderProgram)& aProgram = getStdProgram (theShadingModel, aBits); |
299e0ab9 |
146 | return bindProgramWithState (aProgram); |
8625ef7e |
147 | } |
148 | |
149 | //! Bind program for rendering alpha-textured font. |
299e0ab9 |
150 | Standard_Boolean BindFontProgram (const Handle(OpenGl_ShaderProgram)& theCustomProgram) |
8625ef7e |
151 | { |
152 | if (!theCustomProgram.IsNull() |
153 | || myContext->caps->ffpEnable) |
154 | { |
299e0ab9 |
155 | return bindProgramWithState (theCustomProgram); |
8625ef7e |
156 | } |
157 | |
158 | if (myFontProgram.IsNull()) |
159 | { |
160 | prepareStdProgramFont(); |
161 | } |
299e0ab9 |
162 | |
163 | return bindProgramWithState (myFontProgram); |
8625ef7e |
164 | } |
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165 | |
b86bb3df |
166 | //! Bind program for FBO blit operation. |
167 | Standard_Boolean BindFboBlitProgram() |
168 | { |
169 | if (myBlitProgram.IsNull()) |
170 | { |
171 | prepareStdProgramFboBlit(); |
172 | } |
173 | return !myBlitProgram.IsNull() |
174 | && myContext->BindProgram (myBlitProgram); |
175 | } |
176 | |
a1073ae2 |
177 | //! Bind program for blended order-independent transparency buffers compositing. |
178 | Standard_Boolean BindOitCompositingProgram (const Standard_Boolean theIsMSAAEnabled) |
179 | { |
180 | const Standard_Integer aProgramIdx = theIsMSAAEnabled ? 1 : 0; |
181 | if (myOitCompositingProgram[aProgramIdx].IsNull()) |
182 | { |
183 | prepareStdProgramOitCompositing (theIsMSAAEnabled); |
184 | } |
185 | |
186 | const Handle(OpenGl_ShaderProgram)& aProgram = myOitCompositingProgram [aProgramIdx]; |
187 | return !aProgram.IsNull() && myContext->BindProgram (aProgram); |
188 | } |
189 | |
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190 | //! Bind program for rendering stereoscopic image. |
191 | Standard_Boolean BindStereoProgram (const Graphic3d_StereoMode theStereoMode) |
38a0206f |
192 | { |
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193 | if (theStereoMode < 0 || theStereoMode >= Graphic3d_StereoMode_NB) |
38a0206f |
194 | { |
f978241f |
195 | return Standard_False; |
38a0206f |
196 | } |
f978241f |
197 | |
198 | if (myStereoPrograms[theStereoMode].IsNull()) |
199 | { |
200 | prepareStdProgramStereo (myStereoPrograms[theStereoMode], theStereoMode); |
201 | } |
202 | const Handle(OpenGl_ShaderProgram)& aProgram = myStereoPrograms[theStereoMode]; |
203 | return !aProgram.IsNull() |
204 | && myContext->BindProgram (aProgram); |
38a0206f |
205 | } |
206 | |
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207 | public: |
208 | |
209 | //! Returns current state of OCCT light sources. |
8613985b |
210 | const OpenGl_LightSourceState& LightSourceState() const { return myLightSourceState; } |
30f0ad28 |
211 | |
212 | //! Updates state of OCCT light sources. |
992ed6b3 |
213 | Standard_EXPORT void UpdateLightSourceStateTo (const Handle(Graphic3d_LightSet)& theLights); |
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214 | |
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215 | //! Invalidate state of OCCT light sources. |
216 | Standard_EXPORT void UpdateLightSourceState(); |
217 | |
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218 | //! Pushes current state of OCCT light sources to specified program. |
219 | Standard_EXPORT void PushLightSourceState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
220 | |
221 | public: |
222 | |
223 | //! Returns current state of OCCT projection transform. |
8613985b |
224 | const OpenGl_ProjectionState& ProjectionState() const { return myProjectionState; } |
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225 | |
226 | //! Updates state of OCCT projection transform. |
c827ea3a |
227 | Standard_EXPORT void UpdateProjectionStateTo (const OpenGl_Mat4& theProjectionMatrix); |
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228 | |
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229 | //! Pushes current state of OCCT projection transform to specified program. |
230 | Standard_EXPORT void PushProjectionState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
231 | |
232 | public: |
233 | |
234 | //! Returns current state of OCCT model-world transform. |
8613985b |
235 | const OpenGl_ModelWorldState& ModelWorldState() const { return myModelWorldState; } |
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236 | |
237 | //! Updates state of OCCT model-world transform. |
c827ea3a |
238 | Standard_EXPORT void UpdateModelWorldStateTo (const OpenGl_Mat4& theModelWorldMatrix); |
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239 | |
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240 | //! Pushes current state of OCCT model-world transform to specified program. |
241 | Standard_EXPORT void PushModelWorldState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
242 | |
243 | public: |
244 | |
245 | //! Returns current state of OCCT world-view transform. |
8613985b |
246 | const OpenGl_WorldViewState& WorldViewState() const { return myWorldViewState; } |
30f0ad28 |
247 | |
248 | //! Updates state of OCCT world-view transform. |
c827ea3a |
249 | Standard_EXPORT void UpdateWorldViewStateTo (const OpenGl_Mat4& theWorldViewMatrix); |
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250 | |
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251 | //! Pushes current state of OCCT world-view transform to specified program. |
252 | Standard_EXPORT void PushWorldViewState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
253 | |
254 | public: |
255 | |
256 | //! Updates state of OCCT clipping planes. |
257 | Standard_EXPORT void UpdateClippingState(); |
258 | |
259 | //! Reverts state of OCCT clipping planes. |
260 | Standard_EXPORT void RevertClippingState(); |
261 | |
262 | //! Pushes current state of OCCT clipping planes to specified program. |
263 | Standard_EXPORT void PushClippingState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
264 | |
8613985b |
265 | public: |
266 | |
267 | //! Returns current state of material. |
268 | const OpenGl_MaterialState& MaterialState() const { return myMaterialState; } |
269 | |
270 | //! Updates state of material. |
271 | void UpdateMaterialStateTo (const OpenGl_Material& theFrontMat, |
272 | const OpenGl_Material& theBackMat, |
c40eb6b9 |
273 | const float theAlphaCutoff, |
8613985b |
274 | const bool theToDistinguish, |
275 | const bool theToMapTexture) |
276 | { |
c40eb6b9 |
277 | myMaterialState.Set (theFrontMat, theBackMat, theAlphaCutoff, theToDistinguish, theToMapTexture); |
8613985b |
278 | myMaterialState.Update(); |
279 | } |
280 | |
281 | //! Updates state of material. |
282 | void UpdateMaterialState() |
283 | { |
284 | myMaterialState.Update(); |
285 | } |
286 | |
287 | //! Pushes current state of material to specified program. |
288 | void PushMaterialState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
289 | |
a1073ae2 |
290 | public: |
291 | |
292 | //! Set the state of OIT rendering pass. |
293 | //! @param theToEnableOitWrite [in] flag indicating whether the special output should be written for OIT algorithm. |
294 | //! @param theDepthFactor [in] the scalar factor of depth influence to the fragment's coverage. |
295 | void SetOitState (const bool theToEnableOitWrite, const float theDepthFactor) |
296 | { |
297 | myOitState.Set (theToEnableOitWrite, theDepthFactor); |
298 | myOitState.Update(); |
299 | } |
300 | |
301 | //! Pushes state of OIT uniforms to the specified program. |
302 | Standard_EXPORT void PushOitState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
303 | |
30f0ad28 |
304 | public: |
05e2200b |
305 | |
30f0ad28 |
306 | //! Pushes current state of OCCT graphics parameters to specified program. |
307 | Standard_EXPORT void PushState (const Handle(OpenGl_ShaderProgram)& theProgram) const; |
308 | |
392ac980 |
309 | public: |
310 | |
311 | //! Overwrites context |
312 | void SetContext (OpenGl_Context* theCtx) |
313 | { |
314 | myContext = theCtx; |
315 | } |
316 | |
c357e426 |
317 | //! Returns true when provided context is the same as used one by shader manager. |
318 | bool IsSameContext (OpenGl_Context* theCtx) const |
319 | { |
320 | return myContext == theCtx; |
321 | } |
322 | |
db5d29de |
323 | //! Choose Shading Model for filled primitives. |
324 | //! Fallbacks to FACET model if there are no normal attributes. |
325 | Graphic3d_TypeOfShadingModel ChooseFaceShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
326 | bool theHasNodalNormals) const |
dc89236f |
327 | { |
328 | if (!myContext->ColorMask()) |
329 | { |
330 | return Graphic3d_TOSM_UNLIT; |
331 | } |
332 | Graphic3d_TypeOfShadingModel aModel = theCustomModel != Graphic3d_TOSM_DEFAULT ? theCustomModel : myShadingModel; |
333 | switch (aModel) |
334 | { |
335 | case Graphic3d_TOSM_DEFAULT: |
336 | case Graphic3d_TOSM_UNLIT: |
337 | case Graphic3d_TOSM_FACET: |
db5d29de |
338 | return aModel; |
dc89236f |
339 | case Graphic3d_TOSM_VERTEX: |
340 | case Graphic3d_TOSM_FRAGMENT: |
db5d29de |
341 | return theHasNodalNormals ? aModel : Graphic3d_TOSM_FACET; |
dc89236f |
342 | } |
db5d29de |
343 | return Graphic3d_TOSM_UNLIT; |
344 | } |
345 | |
346 | //! Choose Shading Model for line primitives. |
347 | //! Fallbacks to UNLIT model if there are no normal attributes. |
348 | Graphic3d_TypeOfShadingModel ChooseLineShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
349 | bool theHasNodalNormals) const |
350 | { |
351 | if (!myContext->ColorMask()) |
352 | { |
353 | return Graphic3d_TOSM_UNLIT; |
354 | } |
355 | Graphic3d_TypeOfShadingModel aModel = theCustomModel != Graphic3d_TOSM_DEFAULT ? theCustomModel : myShadingModel; |
356 | switch (aModel) |
357 | { |
358 | case Graphic3d_TOSM_DEFAULT: |
359 | case Graphic3d_TOSM_UNLIT: |
360 | case Graphic3d_TOSM_FACET: |
361 | return Graphic3d_TOSM_UNLIT; |
362 | case Graphic3d_TOSM_VERTEX: |
363 | case Graphic3d_TOSM_FRAGMENT: |
364 | return theHasNodalNormals ? aModel : Graphic3d_TOSM_UNLIT; |
365 | } |
366 | return Graphic3d_TOSM_UNLIT; |
367 | } |
368 | |
369 | //! Choose Shading Model for Marker primitives. |
370 | Graphic3d_TypeOfShadingModel ChooseMarkerShadingModel (Graphic3d_TypeOfShadingModel theCustomModel, |
371 | bool theHasNodalNormals) const |
372 | { |
373 | return ChooseLineShadingModel (theCustomModel, theHasNodalNormals); |
dc89236f |
374 | } |
375 | |
376 | //! Returns default Shading Model. |
377 | Graphic3d_TypeOfShadingModel ShadingModel() const { return myShadingModel; } |
378 | |
8625ef7e |
379 | //! Sets shading model. |
c357e426 |
380 | Standard_EXPORT void SetShadingModel (const Graphic3d_TypeOfShadingModel theModel); |
8625ef7e |
381 | |
e6804ff7 |
382 | //! Sets last view manger used with. |
383 | //! Helps to handle matrix states in multi-view configurations. |
384 | void SetLastView (const OpenGl_View* theLastView) |
385 | { |
386 | myLastView = theLastView; |
387 | } |
388 | |
389 | //! Returns true when provided view is the same as cached one. |
390 | bool IsSameView (const OpenGl_View* theView) const |
391 | { |
392 | return myLastView == theView; |
393 | } |
394 | |
30f0ad28 |
395 | protected: |
396 | |
8625ef7e |
397 | //! Define program bits. |
cc8cbabe |
398 | Standard_Integer getProgramBits (const Handle(OpenGl_TextureSet)& theTextures, |
c40eb6b9 |
399 | Graphic3d_AlphaMode theAlphaMode, |
400 | Standard_Boolean theHasVertColor, |
401 | Standard_Boolean theEnableEnvMap) |
e135a155 |
402 | |
8625ef7e |
403 | { |
404 | Standard_Integer aBits = 0; |
c40eb6b9 |
405 | if (theAlphaMode == Graphic3d_AlphaMode_Mask) |
406 | { |
407 | aBits |= OpenGl_PO_AlphaTest; |
408 | } |
1a7ece8f |
409 | |
410 | const Standard_Integer aNbPlanes = myContext->Clipping().NbClippingOrCappingOn(); |
411 | if (aNbPlanes > 0) |
8625ef7e |
412 | { |
1a7ece8f |
413 | aBits |= OpenGl_PO_ClipPlanesN; |
414 | if (aNbPlanes == 1) |
415 | { |
416 | aBits |= OpenGl_PO_ClipPlanes1; |
417 | } |
418 | else if (aNbPlanes == 2) |
419 | { |
420 | aBits |= OpenGl_PO_ClipPlanes2; |
421 | } |
8625ef7e |
422 | } |
1a7ece8f |
423 | |
83da37b1 |
424 | if (theEnableEnvMap) |
e135a155 |
425 | { |
426 | // Environment map overwrites material texture |
427 | aBits |= OpenGl_PO_TextureEnv; |
428 | } |
cc8cbabe |
429 | else if (!theTextures.IsNull() |
430 | && !theTextures->IsEmpty() |
431 | && !theTextures->First().IsNull()) |
8625ef7e |
432 | { |
cc8cbabe |
433 | aBits |= theTextures->First()->IsAlpha() ? OpenGl_PO_TextureA : OpenGl_PO_TextureRGB; |
8625ef7e |
434 | } |
435 | if (theHasVertColor) |
436 | { |
437 | aBits |= OpenGl_PO_VertColor; |
438 | } |
a1073ae2 |
439 | |
440 | if (myOitState.ToEnableWrite()) |
441 | { |
442 | aBits |= OpenGl_PO_WriteOit; |
443 | } |
8625ef7e |
444 | return aBits; |
445 | } |
446 | |
447 | //! Prepare standard GLSL program. |
dc89236f |
448 | Handle(OpenGl_ShaderProgram)& getStdProgram (Graphic3d_TypeOfShadingModel theShadingModel, |
449 | Standard_Integer theBits) |
8625ef7e |
450 | { |
dc89236f |
451 | if (theShadingModel == Graphic3d_TOSM_UNLIT |
452 | || (theBits & OpenGl_PO_TextureEnv) != 0) |
8625ef7e |
453 | { |
dc89236f |
454 | // If environment map is enabled lighting calculations are |
455 | // not needed (in accordance with default OCCT behavior) |
456 | Handle(OpenGl_ShaderProgram)& aProgram = myUnlitPrograms->ChangeValue (Graphic3d_TOSM_UNLIT, theBits); |
8625ef7e |
457 | if (aProgram.IsNull()) |
458 | { |
dc89236f |
459 | prepareStdProgramUnlit (aProgram, theBits); |
8625ef7e |
460 | } |
461 | return aProgram; |
462 | } |
463 | |
dc89236f |
464 | Handle(OpenGl_ShaderProgram)& aProgram = myLightPrograms->ChangeValue (theShadingModel, theBits); |
8625ef7e |
465 | if (aProgram.IsNull()) |
466 | { |
dc89236f |
467 | prepareStdProgramLight (aProgram, theShadingModel, theBits); |
8625ef7e |
468 | } |
469 | return aProgram; |
470 | } |
471 | |
299e0ab9 |
472 | //! Prepare standard GLSL program for accessing point sprite alpha. |
fd59283a |
473 | Standard_EXPORT TCollection_AsciiString pointSpriteAlphaSrc (const Standard_Integer theBits); |
299e0ab9 |
474 | |
475 | //! Prepare standard GLSL program for computing point sprite shading. |
476 | Standard_EXPORT TCollection_AsciiString pointSpriteShadingSrc (const TCollection_AsciiString theBaseColorSrc, const Standard_Integer theBits); |
477 | |
8625ef7e |
478 | //! Prepare standard GLSL program for textured font. |
479 | Standard_EXPORT Standard_Boolean prepareStdProgramFont(); |
480 | |
b86bb3df |
481 | //! Prepare standard GLSL program for FBO blit operation. |
482 | Standard_EXPORT Standard_Boolean prepareStdProgramFboBlit(); |
483 | |
a1073ae2 |
484 | //! Prepare standard GLSL programs for OIT compositing operation. |
485 | Standard_EXPORT Standard_Boolean prepareStdProgramOitCompositing (const Standard_Boolean theMsaa); |
486 | |
8625ef7e |
487 | //! Prepare standard GLSL program without lighting. |
dc89236f |
488 | Standard_EXPORT Standard_Boolean prepareStdProgramUnlit (Handle(OpenGl_ShaderProgram)& theProgram, |
489 | const Standard_Integer theBits); |
8625ef7e |
490 | |
491 | //! Prepare standard GLSL program with lighting. |
492 | Standard_Boolean prepareStdProgramLight (Handle(OpenGl_ShaderProgram)& theProgram, |
dc89236f |
493 | Graphic3d_TypeOfShadingModel theShadingModel, |
494 | Standard_Integer theBits) |
8625ef7e |
495 | { |
dc89236f |
496 | switch (theShadingModel) |
8c3237d4 |
497 | { |
dc89236f |
498 | case Graphic3d_TOSM_UNLIT: return prepareStdProgramUnlit (theProgram, theBits); |
8c3237d4 |
499 | case Graphic3d_TOSM_FACET: return prepareStdProgramPhong (theProgram, theBits, true); |
500 | case Graphic3d_TOSM_VERTEX: return prepareStdProgramGouraud(theProgram, theBits); |
dc89236f |
501 | case Graphic3d_TOSM_DEFAULT: |
8c3237d4 |
502 | case Graphic3d_TOSM_FRAGMENT: return prepareStdProgramPhong (theProgram, theBits, false); |
503 | } |
504 | return false; |
8625ef7e |
505 | } |
506 | |
507 | //! Prepare standard GLSL program with per-vertex lighting. |
508 | Standard_EXPORT Standard_Boolean prepareStdProgramGouraud (Handle(OpenGl_ShaderProgram)& theProgram, |
509 | const Standard_Integer theBits); |
510 | |
511 | //! Prepare standard GLSL program with per-pixel lighting. |
8c3237d4 |
512 | //! @param theIsFlatNormal when TRUE, the Vertex normals will be ignored and Face normal will be computed instead |
8625ef7e |
513 | Standard_EXPORT Standard_Boolean prepareStdProgramPhong (Handle(OpenGl_ShaderProgram)& theProgram, |
8c3237d4 |
514 | const Standard_Integer theBits, |
515 | const Standard_Boolean theIsFlatNormal = false); |
8625ef7e |
516 | |
256f9ac0 |
517 | //! Define computeLighting GLSL function depending on current lights configuration |
daf73ab7 |
518 | //! @param theNbLights [out] number of defined light sources |
519 | //! @param theHasVertColor [in] flag to use getVertColor() instead of Ambient and Diffuse components of active material |
520 | Standard_EXPORT TCollection_AsciiString stdComputeLighting (Standard_Integer& theNbLights, |
521 | Standard_Boolean theHasVertColor); |
256f9ac0 |
522 | |
8625ef7e |
523 | //! Bind specified program to current context and apply state. |
299e0ab9 |
524 | Standard_EXPORT Standard_Boolean bindProgramWithState (const Handle(OpenGl_ShaderProgram)& theProgram); |
8625ef7e |
525 | |
256f9ac0 |
526 | //! Set pointer myLightPrograms to active lighting programs set from myMapOfLightPrograms |
527 | Standard_EXPORT void switchLightPrograms(); |
528 | |
f978241f |
529 | //! Prepare standard GLSL program for stereoscopic image. |
530 | Standard_EXPORT Standard_Boolean prepareStdProgramStereo (Handle(OpenGl_ShaderProgram)& theProgram, |
531 | const Graphic3d_StereoMode theStereoMode); |
38a0206f |
532 | |
7c3ef2f7 |
533 | protected: |
534 | |
535 | //! Packed properties of light source |
536 | struct OpenGl_ShaderLightParameters |
537 | { |
538 | OpenGl_Vec4 Color; |
539 | OpenGl_Vec4 Position; |
540 | OpenGl_Vec4 Direction; |
541 | OpenGl_Vec4 Parameters; |
542 | |
543 | //! Returns packed (serialized) representation of light source properties |
544 | const OpenGl_Vec4* Packed() const { return reinterpret_cast<const OpenGl_Vec4*> (this); } |
545 | static Standard_Integer NbOfVec4() { return 4; } |
546 | }; |
547 | |
548 | //! Packed light source type information |
549 | struct OpenGl_ShaderLightType |
550 | { |
551 | Standard_Integer Type; |
552 | Standard_Integer IsHeadlight; |
553 | |
554 | //! Returns packed (serialized) representation of light source type |
555 | const OpenGl_Vec2i* Packed() const { return reinterpret_cast<const OpenGl_Vec2i*> (this); } |
556 | static Standard_Integer NbOfVec2i() { return 1; } |
557 | }; |
558 | |
8613985b |
559 | //! Fake OpenGL program for tracking FFP state in the way consistent to programmable pipeline. |
560 | class OpenGl_ShaderProgramFFP : public OpenGl_ShaderProgram |
561 | { |
562 | DEFINE_STANDARD_RTTI_INLINE(OpenGl_ShaderProgramFFP, OpenGl_ShaderProgram) |
563 | friend class OpenGl_ShaderManager; |
564 | protected: |
565 | OpenGl_ShaderProgramFFP() {} |
566 | }; |
567 | |
8625ef7e |
568 | protected: |
569 | |
8613985b |
570 | Handle(OpenGl_ShaderProgramFFP) myFfpProgram; |
571 | |
c357e426 |
572 | Graphic3d_TypeOfShadingModel myShadingModel; //!< lighting shading model |
256f9ac0 |
573 | OpenGl_ShaderProgramList myProgramList; //!< The list of shader programs |
574 | Handle(OpenGl_SetOfShaderPrograms) myLightPrograms; //!< pointer to active lighting programs matrix |
dc89236f |
575 | Handle(OpenGl_SetOfShaderPrograms) myUnlitPrograms; //!< programs matrix without lighting |
256f9ac0 |
576 | Handle(OpenGl_ShaderProgram) myFontProgram; //!< standard program for textured text |
b86bb3df |
577 | Handle(OpenGl_ShaderProgram) myBlitProgram; //!< standard program for FBO blit emulation |
a1073ae2 |
578 | Handle(OpenGl_ShaderProgram) myOitCompositingProgram[2]; //!< standard program for OIT compositing (default and MSAA). |
dc89236f |
579 | OpenGl_MapOfShaderPrograms myMapOfLightPrograms; //!< map of lighting programs depending on lights configuration |
8625ef7e |
580 | |
f978241f |
581 | Handle(OpenGl_ShaderProgram) myStereoPrograms[Graphic3d_StereoMode_NB]; //!< standard stereo programs |
38a0206f |
582 | |
256f9ac0 |
583 | OpenGl_Context* myContext; //!< OpenGL context |
8625ef7e |
584 | |
585 | protected: |
586 | |
256f9ac0 |
587 | OpenGl_ProjectionState myProjectionState; //!< State of OCCT projection transformation |
588 | OpenGl_ModelWorldState myModelWorldState; //!< State of OCCT model-world transformation |
589 | OpenGl_WorldViewState myWorldViewState; //!< State of OCCT world-view transformation |
8cf06aa2 |
590 | OpenGl_ClippingState myClippingState; //!< State of OCCT clipping planes |
256f9ac0 |
591 | OpenGl_LightSourceState myLightSourceState; //!< State of OCCT light sources |
8613985b |
592 | OpenGl_MaterialState myMaterialState; //!< State of Front and Back materials |
a1073ae2 |
593 | OpenGl_OitState myOitState; //!< State of OIT uniforms |
8613985b |
594 | |
7c3ef2f7 |
595 | gp_XYZ myLocalOrigin; //!< local camera transformation |
596 | Standard_Boolean myHasLocalOrigin; //!< flag indicating that local camera transformation has been set |
597 | |
daf73ab7 |
598 | mutable NCollection_Array1<OpenGl_ShaderLightType> myLightTypeArray; |
599 | mutable NCollection_Array1<OpenGl_ShaderLightParameters> myLightParamsArray; |
600 | mutable NCollection_Array1<OpenGl_Vec4> myClipPlaneArray; |
601 | mutable NCollection_Array1<OpenGl_Vec4d> myClipPlaneArrayFfp; |
30f0ad28 |
602 | |
603 | private: |
604 | |
256f9ac0 |
605 | const OpenGl_View* myLastView; //!< Pointer to the last view shader manager used with |
8625ef7e |
606 | |
30f0ad28 |
607 | }; |
608 | |
8613985b |
609 | DEFINE_STANDARD_HANDLE(OpenGl_ShaderManager, Standard_Transient) |
610 | |
30f0ad28 |
611 | #endif // _OpenGl_ShaderManager_HeaderFile |