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6aca4d39 | 1 | // Created on: 2012-01-26 |
b311480e | 2 | // Created by: Kirill GAVRILOV |
6aca4d39 | 3 | // Copyright (c) 2012-2014 OPEN CASCADE SAS |
b311480e | 4 | // |
973c2be1 | 5 | // This file is part of Open CASCADE Technology software library. |
b311480e | 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. | |
b311480e | 12 | // |
973c2be1 | 13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. | |
b311480e | 15 | |
2166f0fa SK |
16 | #ifndef _OpenGl_Context_H__ |
17 | #define _OpenGl_Context_H__ | |
18 | ||
2bd4c032 | 19 | #include <Aspect_Handle.hxx> |
20 | #include <Aspect_Drawable.hxx> | |
21 | #include <Aspect_Display.hxx> | |
22 | #include <Aspect_RenderingContext.hxx> | |
5e27df78 | 23 | #include <Handle_OpenGl_Context.hxx> |
30f0ad28 | 24 | #include <Handle_OpenGl_ShaderManager.hxx> |
5e27df78 | 25 | #include <NCollection_DataMap.hxx> |
4269bd1b | 26 | #include <NCollection_Map.hxx> |
5e27df78 | 27 | #include <NCollection_Handle.hxx> |
3125ebb6 | 28 | #include <NCollection_List.hxx> |
cbf18624 | 29 | #include <Message.hxx> |
58655684 | 30 | #include <OpenGl_Caps.hxx> |
5e27df78 | 31 | #include <OpenGl_Resource.hxx> |
2166f0fa | 32 | #include <Standard_Transient.hxx> |
f0430952 | 33 | #include <TCollection_AsciiString.hxx> |
2166f0fa | 34 | #include <Handle_OpenGl_Context.hxx> |
30f0ad28 | 35 | #include <OpenGl_Clipping.hxx> |
b5ac8292 | 36 | #include <OpenGl_GlCore11.hxx> |
2166f0fa | 37 | |
5f8b738e | 38 | //! Forward declarations |
01ca42b2 | 39 | struct OpenGl_GlFunctions; |
5e27df78 | 40 | struct OpenGl_ArbTBO; |
41 | struct OpenGl_ArbIns; | |
58655684 | 42 | struct OpenGl_ArbDbg; |
01ca42b2 | 43 | struct OpenGl_ArbFBO; |
37eb4787 | 44 | struct OpenGl_ExtGS; |
2166f0fa | 45 | |
01ca42b2 | 46 | template<typename theBaseClass_t> struct OpenGl_TmplCore12; |
47 | typedef OpenGl_TmplCore12<OpenGl_GlCore11> OpenGl_GlCore12; | |
48 | typedef OpenGl_TmplCore12<OpenGl_GlCore11Fwd> OpenGl_GlCore12Fwd; | |
49 | ||
50 | struct OpenGl_GlCore13; | |
51 | struct OpenGl_GlCore13Fwd; | |
52 | ||
53 | template<typename theBaseClass_t> struct OpenGl_TmplCore14; | |
54 | typedef OpenGl_TmplCore14<OpenGl_GlCore13> OpenGl_GlCore14; | |
55 | typedef OpenGl_TmplCore14<OpenGl_GlCore13Fwd> OpenGl_GlCore14Fwd; | |
56 | ||
57 | template<typename theBaseClass_t> struct OpenGl_TmplCore15; | |
58 | typedef OpenGl_TmplCore15<OpenGl_GlCore14> OpenGl_GlCore15; | |
59 | typedef OpenGl_TmplCore15<OpenGl_GlCore14Fwd> OpenGl_GlCore15Fwd; | |
60 | ||
61 | template<typename theBaseClass_t> struct OpenGl_TmplCore20; | |
62 | typedef OpenGl_TmplCore20<OpenGl_GlCore15> OpenGl_GlCore20; | |
63 | typedef OpenGl_TmplCore20<OpenGl_GlCore15Fwd> OpenGl_GlCore20Fwd; | |
64 | ||
65 | template<typename theBaseClass_t> struct OpenGl_TmplCore21; | |
66 | typedef OpenGl_TmplCore21<OpenGl_GlCore20> OpenGl_GlCore21; | |
67 | typedef OpenGl_TmplCore21<OpenGl_GlCore20Fwd> OpenGl_GlCore21Fwd; | |
68 | ||
69 | template<typename theBaseClass_t> struct OpenGl_TmplCore30; | |
70 | typedef OpenGl_TmplCore30<OpenGl_GlCore21> OpenGl_GlCore30; | |
71 | typedef OpenGl_TmplCore30<OpenGl_GlCore21Fwd> OpenGl_GlCore30Fwd; | |
72 | ||
73 | template<typename theBaseClass_t> struct OpenGl_TmplCore31; | |
74 | typedef OpenGl_TmplCore31<OpenGl_GlCore30> OpenGl_GlCore31Back; | |
75 | typedef OpenGl_TmplCore31<OpenGl_GlCore30Fwd> OpenGl_GlCore31; | |
76 | ||
77 | template<typename theBaseClass_t> struct OpenGl_TmplCore32; | |
78 | typedef OpenGl_TmplCore32<OpenGl_GlCore31Back> OpenGl_GlCore32Back; | |
79 | typedef OpenGl_TmplCore32<OpenGl_GlCore31> OpenGl_GlCore32; | |
80 | ||
81 | template<typename theBaseClass_t> struct OpenGl_TmplCore33; | |
82 | typedef OpenGl_TmplCore33<OpenGl_GlCore32Back> OpenGl_GlCore33Back; | |
83 | typedef OpenGl_TmplCore33<OpenGl_GlCore32> OpenGl_GlCore33; | |
84 | ||
85 | template<typename theBaseClass_t> struct OpenGl_TmplCore40; | |
86 | typedef OpenGl_TmplCore40<OpenGl_GlCore33Back> OpenGl_GlCore40Back; | |
87 | typedef OpenGl_TmplCore40<OpenGl_GlCore33> OpenGl_GlCore40; | |
88 | ||
89 | template<typename theBaseClass_t> struct OpenGl_TmplCore41; | |
90 | typedef OpenGl_TmplCore41<OpenGl_GlCore40Back> OpenGl_GlCore41Back; | |
91 | typedef OpenGl_TmplCore41<OpenGl_GlCore40> OpenGl_GlCore41; | |
92 | ||
93 | template<typename theBaseClass_t> struct OpenGl_TmplCore42; | |
94 | typedef OpenGl_TmplCore42<OpenGl_GlCore41Back> OpenGl_GlCore42Back; | |
95 | typedef OpenGl_TmplCore42<OpenGl_GlCore41> OpenGl_GlCore42; | |
96 | ||
97 | template<typename theBaseClass_t> struct OpenGl_TmplCore43; | |
98 | typedef OpenGl_TmplCore43<OpenGl_GlCore42Back> OpenGl_GlCore43Back; | |
99 | typedef OpenGl_TmplCore43<OpenGl_GlCore42> OpenGl_GlCore43; | |
100 | ||
101 | template<typename theBaseClass_t> struct OpenGl_TmplCore44; | |
102 | typedef OpenGl_TmplCore44<OpenGl_GlCore43Back> OpenGl_GlCore44Back; | |
103 | typedef OpenGl_TmplCore44<OpenGl_GlCore43> OpenGl_GlCore44; | |
104 | ||
5f8b738e | 105 | //! This class generalize access to the GL context and available extensions. |
106 | //! | |
107 | //! Functions are grouped into structures and accessed as fields. | |
108 | //! You should check the group for NULL before usage (if group is not NULL | |
109 | //! then all functions are available): | |
110 | //! @code | |
111 | //! if (myContext->core20 != NULL) | |
112 | //! { | |
113 | //! myGlProgram = myContext->core20->glCreateProgram(); | |
114 | //! .. do more stuff .. | |
115 | //! } | |
116 | //! else | |
117 | //! { | |
118 | //! .. compatibility with outdated configurations .. | |
119 | //! } | |
120 | //! @endcode | |
121 | //! | |
122 | //! Current implementation provide access to OpenGL core functionality up to 2.0 version | |
123 | //! (core12, core13, core14, core15, fields core20). | |
01ca42b2 | 124 | //! within several extensions (arbTBO, arbFBO, etc.). |
5f8b738e | 125 | //! |
126 | //! Simplified extensions classification: | |
127 | //! - prefixed with NV, AMD, ATI are vendor-specific (however may be provided by other vendors in some cases); | |
128 | //! - prefixed with EXT are accepted by 2+ vendors; | |
129 | //! - prefixed with ARB are accepted by Architecture Review Board and are candidates | |
130 | //! for inclusion into GL core functionality. | |
131 | //! Some functionality can be represented in several extensions simultaneously. | |
132 | //! In this case developer should be careful because different specification may differ | |
133 | //! in aspects (like enumeration values and error-handling). | |
134 | //! | |
135 | //! Notice that some systems provide mechanisms to simultaneously incorporate with GL contexts | |
136 | //! with different capabilities. Thats why OpenGl_Context should be initialized and used | |
137 | //! for each GL context individually. | |
2166f0fa SK |
138 | class OpenGl_Context : public Standard_Transient |
139 | { | |
a174a3c5 | 140 | public: |
141 | ||
142 | //! Function for getting power of to number larger or equal to input number. | |
143 | //! @param theNumber number to 'power of two' | |
144 | //! @param theThreshold upper threshold | |
145 | //! @return power of two number | |
146 | inline static Standard_Integer GetPowerOfTwo (const Standard_Integer theNumber, | |
147 | const Standard_Integer theThreshold) | |
148 | { | |
149 | for (Standard_Integer p2 = 2; p2 <= theThreshold; p2 <<= 1) | |
150 | { | |
151 | if (theNumber <= p2) | |
152 | { | |
153 | return p2; | |
154 | } | |
155 | } | |
156 | return theThreshold; | |
157 | } | |
158 | ||
2166f0fa SK |
159 | public: |
160 | ||
5f8b738e | 161 | //! Empty constructor. You should call Init() to perform initialization with bound GL context. |
58655684 | 162 | Standard_EXPORT OpenGl_Context (const Handle(OpenGl_Caps)& theCaps = NULL); |
5f8b738e | 163 | |
164 | //! Destructor. | |
165 | Standard_EXPORT virtual ~OpenGl_Context(); | |
2166f0fa | 166 | |
5e27df78 | 167 | //! Share GL context resources. |
168 | //! theShareCtx - handle to context to retrieve handles to shared resources. | |
169 | Standard_EXPORT void Share (const Handle(OpenGl_Context)& theShareCtx); | |
170 | ||
7e7c2f0b | 171 | //! Initialize class from currently bound OpenGL context. Method should be called only once. |
172 | //! @return false if no GL context is bound to the current thread | |
f0430952 | 173 | Standard_EXPORT Standard_Boolean Init(); |
2166f0fa | 174 | |
fd4a6963 | 175 | //! @return true if this context is valid (has been initialized) |
176 | inline Standard_Boolean IsValid() const | |
177 | { | |
178 | return myIsInitialized; | |
179 | } | |
180 | ||
58655684 | 181 | #if defined(_WIN32) |
7e7c2f0b | 182 | //! Initialize class from specified window and rendering context. Method should be called only once. |
183 | //! @return false if OpenGL context can not be bound to specified window | |
f0430952 | 184 | Standard_EXPORT Standard_Boolean Init (const Aspect_Handle theWindow, |
185 | const Aspect_Handle theWindowDC, | |
186 | const Aspect_RenderingContext theGContext); | |
7e7c2f0b | 187 | |
188 | //! @return the window handle (HWND) currently bound to this OpenGL context | |
189 | inline Aspect_Handle Window() const | |
190 | { | |
191 | return myWindow; | |
192 | } | |
193 | ||
4fe56619 | 194 | #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX) |
7e7c2f0b | 195 | //! Initialize class from specified OpenGL context (NSOpenGLContext). Method should be called only once. |
4fe56619 | 196 | Standard_EXPORT Standard_Boolean Init (const void* theGContext); |
2bd4c032 | 197 | #else |
7e7c2f0b | 198 | //! Initialize class from specified window and rendering context. Method should be called only once. |
199 | //! @return false if OpenGL context can not be bound to specified window | |
f0430952 | 200 | Standard_EXPORT Standard_Boolean Init (const Aspect_Drawable theWindow, |
201 | const Aspect_Display theDisplay, | |
202 | const Aspect_RenderingContext theGContext); | |
7e7c2f0b | 203 | |
204 | //! @return the window handle (GLXDrawable) currently bound to this OpenGL context | |
205 | inline Aspect_Drawable Window() const | |
206 | { | |
207 | return myWindow; | |
208 | } | |
2bd4c032 | 209 | #endif |
210 | ||
5f8b738e | 211 | //! Check if theExtName extension is supported by active GL context. |
2bd4c032 | 212 | Standard_EXPORT Standard_Boolean CheckExtension (const char* theExtName) const; |
2166f0fa | 213 | |
58655684 | 214 | //! Check if theExtName extension is in extensions string. |
215 | Standard_EXPORT static Standard_Boolean CheckExtension (const char* theExtString, | |
216 | const char* theExtName); | |
217 | ||
2166f0fa | 218 | //! Auxiliary template to retrieve GL function pointer. |
5f8b738e | 219 | //! Pointer to function retrieved from library is statically casted |
220 | //! to requested type - there no way to check real signature of exported function. | |
2166f0fa SK |
221 | //! The context should be bound before call. |
222 | template <typename FuncType_t> | |
5f8b738e | 223 | Standard_Boolean FindProc (const char* theFuncName, |
224 | FuncType_t& theFuncPtr) | |
2166f0fa | 225 | { |
5f8b738e | 226 | theFuncPtr = (FuncType_t )findProc (theFuncName); |
2166f0fa SK |
227 | return (theFuncPtr != NULL); |
228 | } | |
229 | ||
2bd4c032 | 230 | //! @return true if detected GL version is greater or equal to requested one. |
231 | inline Standard_Boolean IsGlGreaterEqual (const Standard_Integer theVerMajor, | |
7e7c2f0b | 232 | const Standard_Integer theVerMinor) const |
5f8b738e | 233 | { |
234 | return (myGlVerMajor > theVerMajor) | |
235 | || (myGlVerMajor == theVerMajor && myGlVerMinor >= theVerMinor); | |
236 | } | |
237 | ||
238 | //! Clean up errors stack for this GL context (glGetError() in loop). | |
239 | Standard_EXPORT void ResetErrors(); | |
240 | ||
86fa64d9 | 241 | //! This method uses system-dependent API to retrieve information |
242 | //! about GL context bound to the current thread. | |
243 | //! @return true if current thread is bound to this GL context | |
244 | Standard_EXPORT Standard_Boolean IsCurrent() const; | |
245 | ||
2bd4c032 | 246 | //! Activates current context. |
247 | //! Class should be initialized with appropriate info. | |
248 | Standard_EXPORT Standard_Boolean MakeCurrent(); | |
249 | ||
5e27df78 | 250 | //! Swap front/back buffers for this GL context (should be activated before!). |
251 | Standard_EXPORT void SwapBuffers(); | |
252 | ||
b5ac8292 | 253 | //! Return true if active mode is GL_RENDER (cached state) |
254 | Standard_Boolean IsRender() const | |
255 | { | |
256 | return myRenderMode == GL_RENDER; | |
257 | } | |
664cae74 | 258 | |
b5ac8292 | 259 | //! Return true if active mode is GL_FEEDBACK (cached state) |
260 | Standard_Boolean IsFeedback() const | |
261 | { | |
262 | return myRenderMode == GL_FEEDBACK; | |
263 | } | |
664cae74 | 264 | |
f0430952 | 265 | //! This function retrieves information from GL about free GPU memory that is: |
266 | //! - OS-dependent. On some OS it is per-process and on others - for entire system. | |
267 | //! - Vendor-dependent. Currently available only on NVIDIA and AMD/ATi drivers only. | |
268 | //! - Numbers meaning may vary. | |
269 | //! You should use this info only for diagnostics purposes. | |
270 | //! @return free GPU dedicated memory in bytes. | |
271 | Standard_EXPORT Standard_Size AvailableMemory() const; | |
272 | ||
273 | //! This function retrieves information from GL about GPU memory | |
274 | //! and contains more vendor-specific values than AvailableMemory(). | |
275 | Standard_EXPORT TCollection_AsciiString MemoryInfo() const; | |
276 | ||
5e27df78 | 277 | //! Access shared resource by its name. |
278 | //! @param theKey - unique identifier; | |
279 | //! @return handle to shared resource or NULL. | |
280 | Standard_EXPORT const Handle(OpenGl_Resource)& GetResource (const TCollection_AsciiString& theKey) const; | |
281 | ||
282 | //! Access shared resource by its name. | |
283 | //! @param theKey - unique identifier; | |
284 | //! @param theValue - handle to fill; | |
285 | //! @return true if resource was shared. | |
286 | template<typename TheHandleType> | |
287 | Standard_Boolean GetResource (const TCollection_AsciiString& theKey, | |
288 | TheHandleType& theValue) const | |
289 | { | |
290 | const Handle(OpenGl_Resource)& aResource = GetResource (theKey); | |
291 | if (aResource.IsNull()) | |
292 | { | |
293 | return Standard_False; | |
294 | } | |
295 | ||
296 | theValue = TheHandleType::DownCast (aResource); | |
297 | return !theValue.IsNull(); | |
298 | } | |
299 | ||
300 | //! Register shared resource. | |
301 | //! Notice that after registration caller shouldn't release it by himself - | |
302 | //! it will be automatically released on context destruction. | |
303 | //! @param theKey - unique identifier, shouldn't be empty; | |
304 | //! @param theResource - new resource to register, shouldn't be NULL. | |
305 | Standard_EXPORT Standard_Boolean ShareResource (const TCollection_AsciiString& theKey, | |
306 | const Handle(OpenGl_Resource)& theResource); | |
307 | ||
308 | //! Release shared resource. | |
309 | //! If there are more than one reference to this resource | |
310 | //! (also used by some other existing object) then call will be ignored. | |
311 | //! This means that current object itself should nullify handle before this call. | |
312 | //! Notice that this is unrecommended operation at all and should be used | |
313 | //! only in case of fat resources to release memory for other needs. | |
a174a3c5 | 314 | //! @param theKey unique identifier |
315 | //! @param theToDelay postpone release until next redraw call | |
316 | Standard_EXPORT void ReleaseResource (const TCollection_AsciiString& theKey, | |
317 | const Standard_Boolean theToDelay = Standard_False); | |
5e27df78 | 318 | |
319 | //! Append resource to queue for delayed clean up. | |
320 | //! Resources in this queue will be released at next redraw call. | |
321 | Standard_EXPORT void DelayedRelease (Handle(OpenGl_Resource)& theResource); | |
322 | ||
323 | //! Clean up the delayed release queue. | |
324 | Standard_EXPORT void ReleaseDelayed(); | |
325 | ||
4269bd1b | 326 | //! @return tool for management of clippings within this context. |
30f0ad28 | 327 | inline OpenGl_Clipping& ChangeClipping() { return myClippingState; } |
4269bd1b | 328 | |
329 | //! @return tool for management of clippings within this context. | |
30f0ad28 | 330 | inline const OpenGl_Clipping& Clipping() const { return myClippingState; } |
331 | ||
332 | //! @return tool for management of shader programs within this context. | |
333 | inline const Handle(OpenGl_ShaderManager)& ShaderManager() const { return myShaderManager; } | |
4269bd1b | 334 | |
335 | public: | |
336 | ||
bf75be98 | 337 | //! @return maximum degree of anisotropy texture filter |
338 | Standard_EXPORT Standard_Integer MaxDegreeOfAnisotropy() const; | |
339 | ||
340 | //! @return value for GL_MAX_TEXTURE_SIZE | |
341 | Standard_EXPORT Standard_Integer MaxTextureSize() const; | |
342 | ||
4269bd1b | 343 | //! Get maximum number of clip planes supported by OpenGl. |
7e7c2f0b | 344 | //! This value is implementation dependent. At least 6 |
4269bd1b | 345 | //! planes should be supported by OpenGl (see specs). |
346 | //! @return value for GL_MAX_CLIP_PLANES | |
347 | Standard_EXPORT Standard_Integer MaxClipPlanes() const; | |
348 | ||
cbf18624 | 349 | public: |
350 | ||
7e7c2f0b | 351 | //! @return messenger instance |
857ffd5e | 352 | inline const Handle(Message_Messenger)& Messenger() const |
cbf18624 | 353 | { |
8fa64b52 | 354 | return ::Message::DefaultMessenger(); |
cbf18624 | 355 | } |
356 | ||
357 | //! Callback for GL_ARB_debug_output extension | |
358 | //! @param theSource message source within GL_DEBUG_SOURCE_ enumeration | |
359 | //! @param theType message type within GL_DEBUG_TYPE_ enumeration | |
360 | //! @param theId message ID within source | |
361 | //! @param theSeverity message severity within GL_DEBUG_SEVERITY_ enumeration | |
362 | //! @param theMessage the message itself | |
363 | Standard_EXPORT void PushMessage (const unsigned int theSource, | |
364 | const unsigned int theType, | |
365 | const unsigned int theId, | |
366 | const unsigned int theSeverity, | |
367 | const TCollection_ExtendedString& theMessage); | |
368 | ||
b5ac8292 | 369 | |
370 | ||
371 | //! @return true if OpenGl context supports left and | |
372 | //! right rendering buffers. | |
373 | Standard_Boolean HasStereoBuffers() const | |
374 | { | |
375 | return myIsStereoBuffers; | |
376 | } | |
377 | ||
378 | //! Switch to left stereographic rendering buffer. | |
379 | //! This method can be used to keep unchanged choise | |
380 | //! of front/back/both buffer rendering. | |
381 | Standard_EXPORT void SetDrawBufferLeft(); | |
382 | ||
383 | //! Switch to right stereographic rendering buffer. | |
384 | //! This method can be used to keep unchanged choise | |
385 | //! of front/back/both buffer rendering. | |
386 | Standard_EXPORT void SetDrawBufferRight(); | |
387 | ||
388 | //! Switch to non-stereographic rendering buffer. | |
389 | //! This method can be used to keep unchanged choise | |
390 | //! of front/back/both buffer rendering. | |
391 | Standard_EXPORT void SetDrawBufferMono(); | |
392 | ||
393 | //! Fetch OpenGl context state. This class tracks value of several OpenGl | |
394 | //! state variables. Consulting the cached values is quicker than | |
395 | //! doing the same via OpenGl API. Call this method if any of the controlled | |
396 | //! OpenGl state variables has a possibility of being out-of-date. | |
397 | Standard_EXPORT void FetchState(); | |
398 | ||
5f8b738e | 399 | private: |
400 | ||
401 | //! Wrapper to system function to retrieve GL function pointer by name. | |
402 | Standard_EXPORT void* findProc (const char* theFuncName); | |
403 | ||
404 | //! Read OpenGL version information from active context. | |
405 | Standard_EXPORT void readGlVersion(); | |
406 | ||
407 | //! Private initialization function that should be called only once. | |
408 | Standard_EXPORT void init(); | |
409 | ||
01ca42b2 | 410 | public: //! @name core profiles |
411 | ||
412 | OpenGl_GlCore11* core11; //!< OpenGL 1.1 core functionality | |
413 | OpenGl_GlCore11Fwd* core11fwd; //!< OpenGL 1.1 without deprecated entry points | |
414 | OpenGl_GlCore15* core15; //!< OpenGL 1.5 core functionality | |
415 | OpenGl_GlCore15Fwd* core15fwd; //!< OpenGL 1.5 without deprecated entry points | |
416 | OpenGl_GlCore20* core20; //!< OpenGL 2.0 core functionality (includes 1.5) | |
417 | OpenGl_GlCore20Fwd* core20fwd; //!< OpenGL 2.0 without deprecated entry points | |
418 | OpenGl_GlCore32* core32; //!< OpenGL 3.2 core profile | |
419 | OpenGl_GlCore32Back* core32back; //!< OpenGL 3.2 backward compatibility profile | |
420 | OpenGl_GlCore41* core41; //!< OpenGL 4.1 core profile | |
421 | OpenGl_GlCore41Back* core41back; //!< OpenGL 4.1 backward compatibility profile | |
422 | OpenGl_GlCore42* core42; //!< OpenGL 4.2 core profile | |
423 | OpenGl_GlCore42Back* core42back; //!< OpenGL 4.2 backward compatibility profile | |
424 | OpenGl_GlCore43* core43; //!< OpenGL 4.3 core profile | |
425 | OpenGl_GlCore43Back* core43back; //!< OpenGL 4.3 backward compatibility profile | |
426 | OpenGl_GlCore44* core44; //!< OpenGL 4.4 core profile | |
427 | OpenGl_GlCore44Back* core44back; //!< OpenGL 4.4 backward compatibility profile | |
5f8b738e | 428 | |
58655684 | 429 | Handle(OpenGl_Caps) caps; //!< context options |
430 | ||
01ca42b2 | 431 | public: //! @name extensions |
5f8b738e | 432 | |
bf75be98 | 433 | Standard_Boolean arbNPTW; //!< GL_ARB_texture_non_power_of_two |
01ca42b2 | 434 | Standard_Boolean arbTexRG;//!< GL_ARB_texture_rg |
bf75be98 | 435 | OpenGl_ArbTBO* arbTBO; //!< GL_ARB_texture_buffer_object |
436 | OpenGl_ArbIns* arbIns; //!< GL_ARB_draw_instanced | |
58655684 | 437 | OpenGl_ArbDbg* arbDbg; //!< GL_ARB_debug_output |
01ca42b2 | 438 | OpenGl_ArbFBO* arbFBO; //!< GL_ARB_framebuffer_object |
bf75be98 | 439 | OpenGl_ExtGS* extGS; //!< GL_EXT_geometry_shader4 |
440 | Standard_Boolean extBgra; //!< GL_EXT_bgra | |
441 | Standard_Boolean extAnis; //!< GL_EXT_texture_filter_anisotropic | |
b859a34d | 442 | Standard_Boolean extPDS; //!< GL_EXT_packed_depth_stencil |
bf75be98 | 443 | Standard_Boolean atiMem; //!< GL_ATI_meminfo |
444 | Standard_Boolean nvxMem; //!< GL_NVX_gpu_memory_info | |
5f8b738e | 445 | |
5e27df78 | 446 | private: // system-dependent fields |
2166f0fa | 447 | |
58655684 | 448 | #if defined(_WIN32) |
2bd4c032 | 449 | Aspect_Handle myWindow; //!< window handle (owner of GL context) : HWND |
450 | Aspect_Handle myWindowDC; //!< Device Descriptor handle : HDC | |
451 | Aspect_RenderingContext myGContext; //!< Rendering Context handle : HGLRC | |
4fe56619 | 452 | #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX) |
453 | void* myGContext; //!< Rendering Context handle : NSOpenGLContext | |
2bd4c032 | 454 | #else |
455 | Aspect_Drawable myWindow; //!< window handle (owner of GL context) : GLXDrawable | |
456 | Aspect_Display myDisplay; //!< connection to the X-server : Display* | |
457 | Aspect_RenderingContext myGContext; //!< X-GLX rendering context : GLXContext | |
458 | #endif | |
459 | ||
5e27df78 | 460 | private: // context info |
461 | ||
a174a3c5 | 462 | typedef NCollection_DataMap<TCollection_AsciiString, Standard_Integer> OpenGl_DelayReleaseMap; |
463 | typedef NCollection_Handle<OpenGl_DelayReleaseMap> Handle(OpenGl_DelayReleaseMap); | |
5e27df78 | 464 | typedef NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)> OpenGl_ResourcesMap; |
465 | typedef NCollection_Handle<OpenGl_ResourcesMap> Handle(OpenGl_ResourcesMap); | |
3125ebb6 | 466 | typedef NCollection_List<Handle(OpenGl_Resource)> OpenGl_ResourcesStack; |
467 | typedef NCollection_Handle<OpenGl_ResourcesStack> Handle(OpenGl_ResourcesStack); | |
5e27df78 | 468 | |
a174a3c5 | 469 | Handle(OpenGl_ResourcesMap) mySharedResources; //!< shared resources with unique identification key |
470 | Handle(OpenGl_DelayReleaseMap) myDelayed; //!< shared resources for delayed release | |
3125ebb6 | 471 | Handle(OpenGl_ResourcesStack) myUnusedResources; //!< stack of resources for delayed clean up |
5e27df78 | 472 | |
30f0ad28 | 473 | OpenGl_Clipping myClippingState; //!< state of clip planes |
4269bd1b | 474 | |
b5ac8292 | 475 | void* myGlLibHandle; //!< optional handle to GL library |
01ca42b2 | 476 | NCollection_Handle<OpenGl_GlFunctions> |
477 | myFuncs; //!< mega structure for all GL functions | |
b5ac8292 | 478 | Standard_Integer myAnisoMax; //!< maximum level of anisotropy texture filter |
479 | Standard_Integer myMaxTexDim; //!< value for GL_MAX_TEXTURE_SIZE | |
480 | Standard_Integer myMaxClipPlanes; //!< value for GL_MAX_CLIP_PLANES | |
481 | Standard_Integer myGlVerMajor; //!< cached GL version major number | |
482 | Standard_Integer myGlVerMinor; //!< cached GL version minor number | |
483 | Standard_Integer myRenderMode; //!< value for active rendering mode | |
484 | Standard_Boolean myIsInitialized; //!< flag indicates initialization state | |
485 | Standard_Boolean myIsStereoBuffers; //!< context supports stereo buffering | |
486 | Standard_Integer myDrawBuffer; //!< current draw buffer. | |
2166f0fa | 487 | |
30f0ad28 | 488 | Handle(OpenGl_ShaderManager) myShaderManager; //! support object for managing shader programs |
489 | ||
5e27df78 | 490 | private: |
491 | ||
492 | //! Copying allowed only within Handles | |
493 | OpenGl_Context (const OpenGl_Context& ); | |
494 | OpenGl_Context& operator= (const OpenGl_Context& ); | |
495 | ||
2166f0fa SK |
496 | public: |
497 | ||
5f8b738e | 498 | DEFINE_STANDARD_RTTI(OpenGl_Context) // Type definition |
2166f0fa | 499 | |
5e27df78 | 500 | friend class OpenGl_Window; |
501 | ||
2166f0fa SK |
502 | }; |
503 | ||
504 | #endif // _OpenGl_Context_H__ |