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