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1 | // Created on: 2013-09-19 |
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 |
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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_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 | |
26 | #include <InterfaceGraphic_tgl_all.hxx> |
27 | |
28 | #include <OpenGl_Vec.hxx> |
29 | #include <OpenGl_Matrix.hxx> |
30 | #include <OpenGl_ShaderObject.hxx> |
31 | #include <Handle_OpenGl_ShaderProgram.hxx> |
32 | |
33 | //! The enumeration of OCCT-specific OpenGL/GLSL variables. |
34 | enum OpenGl_StateVariable |
35 | { |
36 | // OpenGL matrix state |
37 | OpenGl_OCC_MODEL_WORLD_MATRIX, |
38 | OpenGl_OCC_WORLD_VIEW_MATRIX, |
39 | OpenGl_OCC_PROJECTION_MATRIX, |
40 | OpenGl_OCC_MODEL_WORLD_MATRIX_INVERSE, |
41 | OpenGl_OCC_WORLD_VIEW_MATRIX_INVERSE, |
42 | OpenGl_OCC_PROJECTION_MATRIX_INVERSE, |
43 | OpenGl_OCC_MODEL_WORLD_MATRIX_TRANSPOSE, |
44 | OpenGl_OCC_WORLD_VIEW_MATRIX_TRANSPOSE, |
45 | OpenGl_OCC_PROJECTION_MATRIX_TRANSPOSE, |
46 | OpenGl_OCC_MODEL_WORLD_MATRIX_INVERSE_TRANSPOSE, |
47 | OpenGl_OCC_WORLD_VIEW_MATRIX_INVERSE_TRANSPOSE, |
48 | OpenGl_OCC_PROJECTION_MATRIX_INVERSE_TRANSPOSE, |
49 | |
50 | // OpenGL clip planes state |
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51 | OpenGl_OCC_CLIP_PLANE_EQUATIONS, |
52 | OpenGl_OCC_CLIP_PLANE_SPACES, |
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53 | OpenGl_OCC_CLIP_PLANE_COUNT, |
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54 | |
55 | // OpenGL light state |
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56 | OpenGl_OCC_LIGHT_SOURCE_COUNT, |
57 | OpenGl_OCC_LIGHT_SOURCE_TYPES, |
58 | OpenGl_OCC_LIGHT_SOURCE_PARAMS, |
59 | OpenGl_OCC_LIGHT_AMBIENT, |
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60 | |
61 | // Material state |
62 | OpenGl_OCCT_ACTIVE_SAMPLER, |
63 | OpenGl_OCCT_TEXTURE_ENABLE, |
64 | OpenGl_OCCT_DISTINGUISH_MODE, |
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65 | OpenGl_OCCT_FRONT_MATERIAL, |
66 | OpenGl_OCCT_BACK_MATERIAL, |
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67 | OpenGl_OCCT_COLOR, |
68 | |
69 | OpenGl_OCCT_POINT_SIZE, |
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70 | |
71 | // DON'T MODIFY THIS ITEM (insert new items before it) |
72 | OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES |
73 | }; |
74 | |
75 | class OpenGl_ShaderProgram; |
76 | |
77 | //! Interface for generic setter of user-defined uniform variables. |
78 | struct OpenGl_SetterInterface |
79 | { |
80 | //! Sets user-defined uniform variable to specified program. |
81 | virtual void Set (const Handle(OpenGl_Context)& theCtx, |
82 | const Handle(Graphic3d_ShaderVariable)& theVariable, |
83 | OpenGl_ShaderProgram* theProgram) = 0; |
84 | |
85 | //! Destructor |
86 | virtual ~OpenGl_SetterInterface() {} |
87 | }; |
88 | |
89 | //! List of OpenGL shader objects. |
90 | typedef NCollection_Sequence<Handle(OpenGl_ShaderObject)> OpenGl_ShaderList; |
91 | |
92 | //! List of shader variable setters. |
93 | typedef NCollection_DataMap<size_t, OpenGl_SetterInterface*> OpenGl_SetterList; |
94 | |
95 | //! Support tool for setting user-defined uniform variables. |
96 | class OpenGl_VariableSetterSelector |
97 | { |
98 | public: |
99 | |
100 | //! Creates new setter selector. |
101 | OpenGl_VariableSetterSelector(); |
102 | |
103 | //! Releases memory resources of setter selector. |
104 | ~OpenGl_VariableSetterSelector(); |
105 | |
106 | //! Sets user-defined uniform variable to specified program. |
107 | void Set (const Handle(OpenGl_Context)& theCtx, |
108 | const Handle(Graphic3d_ShaderVariable)& theVariable, |
109 | OpenGl_ShaderProgram* theProgram) const; |
110 | |
111 | private: |
112 | |
113 | //! List of variable setters. |
114 | OpenGl_SetterList mySetterList; |
115 | }; |
116 | |
117 | //! Defines types of uniform state variables. |
118 | enum OpenGl_UniformStateType |
119 | { |
120 | OpenGl_LIGHT_SOURCES_STATE, |
121 | OpenGl_CLIP_PLANES_STATE, |
122 | OpenGl_MODEL_WORLD_STATE, |
123 | OpenGl_WORLD_VIEW_STATE, |
124 | OpenGl_PROJECTION_STATE, |
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125 | OpenGl_MATERIALS_STATE, |
126 | OpenGl_SURF_DETAIL_STATE |
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127 | }; |
128 | |
129 | //! Total number of state types. |
130 | const int MaxStateTypes = 6; |
131 | |
132 | //! Wrapper for OpenGL program object. |
133 | class OpenGl_ShaderProgram : public OpenGl_Resource |
134 | { |
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135 | friend class OpenGl_View; |
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136 | |
137 | public: |
138 | |
139 | //! Non-valid shader name. |
140 | static const GLuint NO_PROGRAM = 0; |
141 | |
142 | //! Invalid location of uniform/attribute variable. |
143 | static const GLint INVALID_LOCATION = -1; |
144 | |
145 | //! List of pre-defined OCCT state uniform variables. |
146 | static Standard_CString PredefinedKeywords[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES]; |
147 | |
148 | protected: |
149 | |
150 | //! Creates uninitialized shader program. |
151 | Standard_EXPORT OpenGl_ShaderProgram (const Handle(Graphic3d_ShaderProgram)& theProxy = NULL); |
152 | |
153 | static OpenGl_VariableSetterSelector mySetterSelector; |
154 | |
155 | public: |
156 | |
157 | //! Releases resources of shader program. |
158 | Standard_EXPORT virtual ~OpenGl_ShaderProgram(); |
159 | |
160 | //! Creates new empty shader program of specified type. |
161 | Standard_EXPORT Standard_Boolean Create (const Handle(OpenGl_Context)& theCtx); |
162 | |
163 | //! Destroys shader program. |
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164 | Standard_EXPORT virtual void Release (OpenGl_Context* theCtx); |
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165 | |
166 | //! Attaches shader object to the program object. |
167 | Standard_EXPORT Standard_Boolean AttachShader (const Handle(OpenGl_Context)& theCtx, |
168 | const Handle(OpenGl_ShaderObject)& theShader); |
169 | |
170 | //! Detaches shader object to the program object. |
171 | Standard_EXPORT Standard_Boolean DetachShader (const Handle(OpenGl_Context)& theCtx, |
172 | const Handle(OpenGl_ShaderObject)& theShader); |
173 | |
174 | //! Initializes program object with the list of shader objects. |
175 | Standard_EXPORT Standard_Boolean Initialize (const Handle(OpenGl_Context)& theCtx, |
176 | const Graphic3d_ShaderObjectList& theShaders); |
177 | |
178 | //! Links the program object. |
179 | Standard_EXPORT Standard_Boolean Link (const Handle(OpenGl_Context)& theCtx); |
180 | |
181 | //! Fetches information log of the last link operation. |
182 | Standard_EXPORT Standard_Boolean FetchInfoLog (const Handle(OpenGl_Context)& theCtx, |
183 | TCollection_AsciiString& theLog); |
184 | |
185 | //! Fetches uniform variables from proxy shader program. |
186 | Standard_EXPORT Standard_Boolean ApplyVariables (const Handle(OpenGl_Context)& theCtx); |
187 | |
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188 | //! @return true if current object was initialized |
189 | inline bool IsValid() const |
190 | { |
191 | return myProgramID != NO_PROGRAM; |
192 | } |
193 | |
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194 | //! @return program ID |
195 | inline GLuint ProgramId() const |
196 | { |
197 | return myProgramID; |
198 | } |
199 | |
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200 | private: |
201 | |
202 | //! Returns index of last modification of variables of specified state type. |
203 | Standard_EXPORT Standard_Size ActiveState (const OpenGl_UniformStateType theType) const; |
204 | |
205 | //! Updates index of last modification of variables of specified state type. |
206 | Standard_EXPORT void UpdateState (const OpenGl_UniformStateType theType, |
207 | const Standard_Size theIndex); |
208 | |
209 | public: |
210 | |
211 | //! Returns location of the specific uniform variable. |
212 | Standard_EXPORT GLint GetUniformLocation (const Handle(OpenGl_Context)& theCtx, |
213 | const GLchar* theName) const; |
214 | |
215 | //! Returns index of the generic vertex attribute by variable name. |
216 | Standard_EXPORT GLint GetAttributeLocation (const Handle(OpenGl_Context)& theCtx, |
217 | const GLchar* theName) const; |
218 | |
219 | //! Returns location of the OCCT state uniform variable. |
220 | Standard_EXPORT GLint GetStateLocation (const GLuint theVariable) const; |
221 | |
222 | public: |
223 | |
224 | //! Returns the value of the integer uniform variable. |
225 | Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx, |
226 | const GLchar* theName, |
227 | OpenGl_Vec4i& theValue) const; |
228 | |
229 | Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx, |
230 | GLint theLocation, |
231 | OpenGl_Vec4i& theValue) const; |
232 | |
233 | //! Returns the value of the float uniform variable. |
234 | Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx, |
235 | const GLchar* theName, |
236 | OpenGl_Vec4& theValue) const; |
237 | |
238 | //! Returns the value of the float uniform variable. |
239 | Standard_EXPORT Standard_Boolean GetUniform (const Handle(OpenGl_Context)& theCtx, |
240 | GLint theLocation, |
241 | OpenGl_Vec4& theValue) const; |
242 | |
243 | public: |
244 | |
245 | //! Returns the integer vertex attribute. |
246 | Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx, |
247 | const GLchar* theName, |
248 | OpenGl_Vec4i& theValue) const; |
249 | |
250 | //! Returns the integer vertex attribute. |
251 | Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx, |
252 | GLint theIndex, |
253 | OpenGl_Vec4i& theValue) const; |
254 | |
255 | //! Returns the float vertex attribute. |
256 | Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx, |
257 | const GLchar* theName, |
258 | OpenGl_Vec4& theValue) const; |
259 | |
260 | //! Returns the float vertex attribute. |
261 | Standard_EXPORT Standard_Boolean GetAttribute (const Handle(OpenGl_Context)& theCtx, |
262 | GLint theIndex, |
263 | OpenGl_Vec4& theValue) const; |
264 | |
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265 | public: |
266 | |
267 | //! Wrapper for glBindAttribLocation() |
268 | Standard_EXPORT Standard_Boolean SetAttributeName (const Handle(OpenGl_Context)& theCtx, |
269 | GLint theIndex, |
270 | const GLchar* theName); |
271 | |
272 | //! Wrapper for glVertexAttrib1f() |
273 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
274 | const GLchar* theName, |
275 | GLfloat theValue); |
276 | |
277 | //! Wrapper for glVertexAttrib1f() |
278 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
279 | GLint theIndex, |
280 | GLfloat theValue); |
281 | |
282 | //! Wrapper for glVertexAttrib2fv() |
283 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
284 | const GLchar* theName, |
285 | const OpenGl_Vec2& theValue); |
286 | |
287 | //! Wrapper for glVertexAttrib2fv() |
288 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
289 | GLint theIndex, |
290 | const OpenGl_Vec2& theValue); |
291 | |
292 | //! Wrapper for glVertexAttrib3fv() |
293 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
294 | const GLchar* theName, |
295 | const OpenGl_Vec3& theValue); |
296 | |
297 | //! Wrapper for glVertexAttrib3fv() |
298 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
299 | GLint theIndex, |
300 | const OpenGl_Vec3& theValue); |
301 | |
302 | //! Wrapper for glVertexAttrib4fv() |
303 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
304 | const GLchar* theName, |
305 | const OpenGl_Vec4& theValue); |
306 | |
307 | //! Wrapper for glVertexAttrib4fv() |
308 | Standard_EXPORT Standard_Boolean SetAttribute (const Handle(OpenGl_Context)& theCtx, |
309 | GLint theIndex, |
310 | const OpenGl_Vec4& theValue); |
311 | |
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312 | public: |
313 | |
314 | //! Specifies the value of the integer uniform variable. |
315 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
316 | const GLchar* theName, |
317 | GLint theValue); |
318 | |
319 | //! Specifies the value of the integer uniform variable. |
320 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
321 | GLint theLocation, |
322 | GLint theValue); |
323 | |
324 | //! Specifies the value of the integer uniform 2D vector. |
325 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
326 | const GLchar* theName, |
327 | const OpenGl_Vec2i& theValue); |
328 | |
329 | //! Specifies the value of the integer uniform 2D vector. |
330 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
331 | GLint theLocation, |
332 | const OpenGl_Vec2i& theValue); |
333 | |
334 | //! Specifies the value of the integer uniform 3D vector. |
335 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
336 | const GLchar* theName, |
337 | const OpenGl_Vec3i& theValue); |
338 | |
339 | //! Specifies the value of the integer uniform 3D vector. |
340 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
341 | GLint theLocation, |
342 | const OpenGl_Vec3i& theValue); |
343 | |
344 | //! Specifies the value of the integer uniform 4D vector. |
345 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
346 | const GLchar* theName, |
347 | const OpenGl_Vec4i& theValue); |
348 | |
349 | //! Specifies the value of the integer uniform 4D vector. |
350 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
351 | GLint theLocation, |
352 | const OpenGl_Vec4i& theValue); |
353 | |
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354 | public: |
355 | |
356 | //! Specifies the value of the 64-bit unsigned integer uniform variable. |
357 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
358 | const GLchar* theName, |
359 | GLuint64 theValue); |
360 | |
361 | //! Specifies the value of the 64-bit unsigned integer uniform variable. |
362 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
363 | GLint theLocation, |
364 | GLuint64 theValue); |
365 | |
366 | //! Specifies the value of the 64-bit unsigned integer uniform array. |
367 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
368 | const GLchar* theName, |
369 | const GLsizei theCount, |
370 | const GLuint64* theValue); |
371 | |
372 | //! Specifies the value of the 64-bit unsigned integer uniform array. |
373 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
374 | GLint theLocation, |
375 | const GLsizei theCount, |
376 | const GLuint64* theValue); |
377 | |
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378 | public: |
379 | |
380 | //! Specifies the value of the float uniform variable. |
381 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
382 | const GLchar* theName, |
383 | GLfloat theValue); |
384 | |
385 | //! Specifies the value of the float uniform variable. |
386 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
387 | GLint theLocation, |
388 | GLfloat theValue); |
389 | |
390 | //! Specifies the value of the float uniform 2D vector. |
391 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
392 | const GLchar* theName, |
393 | const OpenGl_Vec2& theValue); |
394 | |
395 | //! Specifies the value of the float uniform 2D vector. |
396 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
397 | GLint theLocation, |
398 | const OpenGl_Vec2& theValue); |
399 | |
400 | //! Specifies the value of the float uniform 3D vector. |
401 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
402 | const GLchar* theName, |
403 | const OpenGl_Vec3& theValue); |
404 | |
405 | //! Specifies the value of the float uniform 3D vector. |
406 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
407 | GLint theLocation, |
408 | const OpenGl_Vec3& theValue); |
409 | |
410 | //! Specifies the value of the float uniform 4D vector. |
411 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
412 | const GLchar* theName, |
413 | const OpenGl_Vec4& theValue); |
414 | |
415 | //! Specifies the value of the float uniform 4D vector. |
416 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
417 | GLint theLocation, |
418 | const OpenGl_Vec4& theValue); |
419 | |
420 | public: |
421 | |
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422 | //! Specifies the value of the float uniform 4x4 matrix. |
423 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
424 | const GLchar* theName, |
425 | const OpenGl_Mat4& theValue, |
426 | GLboolean theTranspose = GL_FALSE); |
427 | |
428 | //! Specifies the value of the float uniform 4x4 matrix. |
429 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
430 | GLint theLocation, |
431 | const OpenGl_Mat4& theValue, |
432 | GLboolean theTranspose = GL_FALSE); |
433 | |
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434 | //! Specifies the value of the float uniform 4x4 matrix. |
435 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
436 | const GLchar* theName, |
437 | const OpenGl_Matrix& theValue, |
438 | GLboolean theTranspose = GL_FALSE); |
439 | |
440 | //! Specifies the value of the float uniform 4x4 matrix. |
441 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
442 | GLint theLocation, |
443 | const OpenGl_Matrix& theValue, |
444 | GLboolean theTranspose = GL_FALSE); |
445 | |
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446 | //! Specifies the value of the float uniform array |
447 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
448 | GLint theLocation, |
449 | GLuint theCount, |
450 | const Standard_ShortReal* theData); |
451 | |
452 | //! Specifies the value of the float2 uniform array |
453 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
454 | GLint theLocation, |
455 | GLuint theCount, |
456 | const OpenGl_Vec2* theData); |
457 | |
458 | //! Specifies the value of the float3 uniform array |
459 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
460 | GLint theLocation, |
461 | GLuint theCount, |
462 | const OpenGl_Vec3* theData); |
463 | |
464 | //! Specifies the value of the float4 uniform array |
465 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
466 | GLint theLocation, |
467 | GLuint theCount, |
468 | const OpenGl_Vec4* theData); |
469 | |
470 | //! Specifies the value of the integer uniform array |
471 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
472 | GLint theLocation, |
473 | GLuint theCount, |
474 | const Standard_Integer* theData); |
475 | |
476 | //! Specifies the value of the int2 uniform array |
477 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
478 | GLint theLocation, |
479 | GLuint theCount, |
480 | const OpenGl_Vec2i* theData); |
481 | |
482 | //! Specifies the value of the int3 uniform array |
483 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
484 | GLint theLocation, |
485 | GLuint theCount, |
486 | const OpenGl_Vec3i* theData); |
487 | |
488 | //! Specifies the value of the int4 uniform array |
489 | Standard_EXPORT Standard_Boolean SetUniform (const Handle(OpenGl_Context)& theCtx, |
490 | GLint theLocation, |
491 | GLuint theCount, |
492 | const OpenGl_Vec4i* theData); |
493 | |
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494 | public: |
495 | |
496 | //! Specifies the value of the sampler uniform variable. |
497 | Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx, |
498 | const GLchar* theName, |
499 | const GLenum theTextureUnit); |
500 | |
501 | //! Specifies the value of the sampler uniform variable. |
502 | Standard_EXPORT Standard_Boolean SetSampler (const Handle(OpenGl_Context)& theCtx, |
503 | GLint theLocation, |
504 | const GLenum theTextureUnit); |
505 | |
506 | protected: |
507 | |
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508 | //! Increments counter of users. |
509 | //! Used by OpenGl_ShaderManager. |
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510 | //! @return true when resource has been restored from delayed release queue |
511 | bool Share() |
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512 | { |
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513 | return ++myShareCount == 1; |
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514 | } |
515 | |
516 | //! Decrements counter of users. |
517 | //! Used by OpenGl_ShaderManager. |
518 | //! @return true when there are no more users of this program has been left |
519 | bool UnShare() |
520 | { |
521 | return --myShareCount == 0; |
522 | } |
523 | |
524 | protected: |
525 | |
526 | GLuint myProgramID; //!< Handle of OpenGL shader program |
527 | OpenGl_ShaderList myShaderObjects; //!< List of attached shader objects |
528 | Handle(Graphic3d_ShaderProgram) myProxy; //!< Proxy shader program (from application layer) |
529 | Standard_Integer myShareCount; //!< program users count, initialized with 1 (already shared by one user) |
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530 | |
531 | protected: |
532 | |
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533 | Standard_Size myCurrentState[MaxStateTypes]; //!< defines last modification for variables of each state type |
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534 | |
535 | //! Stores locations of OCCT state uniform variables. |
536 | GLint myStateLocations[OpenGl_OCCT_NUMBER_OF_STATE_VARIABLES]; |
537 | |
538 | public: |
539 | |
540 | DEFINE_STANDARD_RTTI (OpenGl_ShaderProgram) |
541 | friend class OpenGl_ShaderManager; |
542 | |
543 | }; |
544 | |
545 | template<class T> |
546 | struct OpenGl_VariableSetter : public OpenGl_SetterInterface |
547 | { |
548 | virtual void Set (const Handle(OpenGl_Context)& theCtx, |
549 | const Handle(Graphic3d_ShaderVariable)& theVariable, |
550 | OpenGl_ShaderProgram* theProgram) |
551 | { |
552 | theProgram->SetUniform (theCtx, |
553 | theVariable->Name().ToCString(), |
554 | theVariable->Value()->As<T>()); |
555 | } |
556 | }; |
557 | |
558 | namespace OpenGl_HashMapInitializer |
559 | { |
560 | template<class K, class V> |
561 | struct MapListOfType |
562 | { |
563 | NCollection_DataMap<K, V> myDictionary; |
564 | |
565 | MapListOfType (K theKey, V theValue) |
566 | { |
567 | myDictionary.Bind (theKey, theValue); |
568 | } |
569 | |
570 | MapListOfType& operator() (K theKey, V theValue) |
571 | { |
572 | myDictionary.Bind (theKey, theValue); |
573 | return *this; |
574 | } |
575 | |
576 | operator const NCollection_DataMap<K, V>& () const |
577 | { |
578 | return myDictionary; |
579 | } |
580 | }; |
581 | |
582 | template<class K, class V> |
583 | MapListOfType<K, V> CreateListOf (K theKey, V theValue) |
584 | { |
585 | return MapListOfType<K, V> (theKey, theValue); |
586 | } |
587 | } |
588 | |
589 | #endif // _OpenGl_ShaderProgram_Header |