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0027900: Coding rules - drop redundant Name parameter from V3d_Viewer constructor
[occt.git] / src / OpenGl / OpenGl_View_Redraw.cxx
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c357e426 1// Created on: 2011-09-20
2// Created by: Sergey ZERCHANINOV
3// Copyright (c) 2011-2014 OPEN CASCADE SAS
4//
5// This file is part of Open CASCADE Technology software library.
6//
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
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.
12//
13// Alternatively, this file may be used under the terms of Open CASCADE
14// commercial license or contractual agreement.
15
16#include <stdio.h>
17#include <stdlib.h>
18
19#include <OpenGl_GlCore11.hxx>
c357e426 20
21#include <Graphic3d_GraphicDriver.hxx>
22#include <Graphic3d_TextureParams.hxx>
23#include <Graphic3d_Texture2Dmanual.hxx>
24#include <Graphic3d_TransformUtils.hxx>
25#include <Image_AlienPixMap.hxx>
26
27#include <NCollection_Mat4.hxx>
28
29#include <OpenGl_AspectLine.hxx>
30#include <OpenGl_Context.hxx>
31#include <OpenGl_Matrix.hxx>
32#include <OpenGl_Workspace.hxx>
33#include <OpenGl_View.hxx>
34#include <OpenGl_Trihedron.hxx>
35#include <OpenGl_GraduatedTrihedron.hxx>
36#include <OpenGl_PrimitiveArray.hxx>
c357e426 37#include <OpenGl_ShaderManager.hxx>
38#include <OpenGl_ShaderProgram.hxx>
39#include <OpenGl_Structure.hxx>
40#include <OpenGl_ArbFBO.hxx>
41
42#define EPSI 0.0001
43
44namespace
45{
46 static const GLfloat THE_DEFAULT_AMBIENT[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
47 static const GLfloat THE_DEFAULT_SPOT_DIR[3] = { 0.0f, 0.0f, -1.0f };
48 static const GLfloat THE_DEFAULT_SPOT_EXPONENT = 0.0f;
49 static const GLfloat THE_DEFAULT_SPOT_CUTOFF = 180.0f;
50}
51
52extern void InitLayerProp (const int theListId); //szvgl: defined in OpenGl_GraphicDriver_Layer.cxx
53
54#if !defined(GL_ES_VERSION_2_0)
55
56//=======================================================================
57//function : bindLight
58//purpose :
59//=======================================================================
60static void bindLight (const OpenGl_Light& theLight,
61 GLenum& theLightGlId,
62 Graphic3d_Vec4& theAmbientColor,
63 const Handle(OpenGl_Workspace)& theWorkspace)
64{
65 // Only 8 lights in OpenGL...
66 if (theLightGlId > GL_LIGHT7)
67 {
68 return;
69 }
70
71 if (theLight.Type == Graphic3d_TOLS_AMBIENT)
72 {
73 // add RGBA intensity of the ambient light
74 theAmbientColor += theLight.Color;
75 return;
76 }
77
78 const Handle(OpenGl_Context)& aContext = theWorkspace->GetGlContext();
79
80 // the light is a headlight?
81 if (theLight.IsHeadlight)
82 {
83 aContext->WorldViewState.Push();
84 aContext->WorldViewState.SetIdentity();
85
86 aContext->ApplyWorldViewMatrix();
87 }
88
89 // setup light type
90 switch (theLight.Type)
91 {
92 case Graphic3d_TOLS_AMBIENT : break; // handled by separate if-clause at beginning of method
93 case Graphic3d_TOLS_DIRECTIONAL:
94 {
95 // if the last parameter of GL_POSITION, is zero, the corresponding light source is a Directional one
96 const OpenGl_Vec4 anInfDir = -theLight.Direction;
97
98 // to create a realistic effect, set the GL_SPECULAR parameter to the same value as the GL_DIFFUSE.
99 glLightfv (theLightGlId, GL_AMBIENT, THE_DEFAULT_AMBIENT);
100 glLightfv (theLightGlId, GL_DIFFUSE, theLight.Color.GetData());
101 glLightfv (theLightGlId, GL_SPECULAR, theLight.Color.GetData());
102 glLightfv (theLightGlId, GL_POSITION, anInfDir.GetData());
103 glLightfv (theLightGlId, GL_SPOT_DIRECTION, THE_DEFAULT_SPOT_DIR);
104 glLightf (theLightGlId, GL_SPOT_EXPONENT, THE_DEFAULT_SPOT_EXPONENT);
105 glLightf (theLightGlId, GL_SPOT_CUTOFF, THE_DEFAULT_SPOT_CUTOFF);
106 break;
107 }
108 case Graphic3d_TOLS_POSITIONAL:
109 {
110 // to create a realistic effect, set the GL_SPECULAR parameter to the same value as the GL_DIFFUSE
111 glLightfv (theLightGlId, GL_AMBIENT, THE_DEFAULT_AMBIENT);
112 glLightfv (theLightGlId, GL_DIFFUSE, theLight.Color.GetData());
113 glLightfv (theLightGlId, GL_SPECULAR, theLight.Color.GetData());
114 glLightfv (theLightGlId, GL_POSITION, theLight.Position.GetData());
115 glLightfv (theLightGlId, GL_SPOT_DIRECTION, THE_DEFAULT_SPOT_DIR);
116 glLightf (theLightGlId, GL_SPOT_EXPONENT, THE_DEFAULT_SPOT_EXPONENT);
117 glLightf (theLightGlId, GL_SPOT_CUTOFF, THE_DEFAULT_SPOT_CUTOFF);
118 glLightf (theLightGlId, GL_CONSTANT_ATTENUATION, theLight.ConstAttenuation());
119 glLightf (theLightGlId, GL_LINEAR_ATTENUATION, theLight.LinearAttenuation());
120 glLightf (theLightGlId, GL_QUADRATIC_ATTENUATION, 0.0);
121 break;
122 }
123 case Graphic3d_TOLS_SPOT:
124 {
125 glLightfv (theLightGlId, GL_AMBIENT, THE_DEFAULT_AMBIENT);
126 glLightfv (theLightGlId, GL_DIFFUSE, theLight.Color.GetData());
127 glLightfv (theLightGlId, GL_SPECULAR, theLight.Color.GetData());
128 glLightfv (theLightGlId, GL_POSITION, theLight.Position.GetData());
129 glLightfv (theLightGlId, GL_SPOT_DIRECTION, theLight.Direction.GetData());
130 glLightf (theLightGlId, GL_SPOT_EXPONENT, theLight.Concentration() * 128.0f);
131 glLightf (theLightGlId, GL_SPOT_CUTOFF, (theLight.Angle() * 180.0f) / GLfloat(M_PI));
132 glLightf (theLightGlId, GL_CONSTANT_ATTENUATION, theLight.ConstAttenuation());
133 glLightf (theLightGlId, GL_LINEAR_ATTENUATION, theLight.LinearAttenuation());
134 glLightf (theLightGlId, GL_QUADRATIC_ATTENUATION, 0.0f);
135 break;
136 }
137 }
138
139 // restore matrix in case of headlight
140 if (theLight.IsHeadlight)
141 {
142 aContext->WorldViewState.Pop();
143 }
144
145 glEnable (theLightGlId++);
146}
147#endif
148
149//=======================================================================
a521d90d 150//function : drawBackground
c357e426 151//purpose :
152//=======================================================================
a521d90d 153void OpenGl_View::drawBackground (const Handle(OpenGl_Workspace)& theWorkspace)
c357e426 154{
155 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
156
157 if ((theWorkspace->NamedStatus & OPENGL_NS_WHITEBACK) != 0 // no background
158 || (!myBgTextureArray->IsDefined() // no texture
159 && !myBgGradientArray->IsDefined())) // no gradient
160 {
161 return;
162 }
163
164 const Standard_Boolean wasUsedZBuffer = theWorkspace->SetUseZBuffer (Standard_False);
165 if (wasUsedZBuffer)
166 {
167 aCtx->core11fwd->glDisable (GL_DEPTH_TEST);
168 }
169
c357e426 170 // Drawing background gradient if:
171 // - gradient fill type is not Aspect_GFM_NONE and
172 // - either background texture is no specified or it is drawn in Aspect_FM_CENTERED mode
173 if (myBgGradientArray->IsDefined()
b6472664 174 && (!myTextureParams->Aspect()->ToMapTexture()
c357e426 175 || myBgTextureArray->TextureFillMethod() == Aspect_FM_CENTERED
176 || myBgTextureArray->TextureFillMethod() == Aspect_FM_NONE))
177 {
178 #if !defined(GL_ES_VERSION_2_0)
179 GLint aShadingModelOld = GL_SMOOTH;
180 if (aCtx->core11 != NULL)
181 {
182 aCtx->core11fwd->glDisable (GL_LIGHTING);
183 aCtx->core11fwd->glGetIntegerv (GL_SHADE_MODEL, &aShadingModelOld);
184 aCtx->core11->glShadeModel (GL_SMOOTH);
185 }
186 #endif
187
c357e426 188 myBgGradientArray->Render (theWorkspace);
189
190 #if !defined(GL_ES_VERSION_2_0)
191 if (aCtx->core11 != NULL)
192 {
193 aCtx->core11->glShadeModel (aShadingModelOld);
194 }
195 #endif
196 }
197
198 // Drawing background image if it is defined
199 // (texture is defined and fill type is not Aspect_FM_NONE)
200 if (myBgTextureArray->IsDefined()
b6472664 201 && myTextureParams->Aspect()->ToMapTexture())
c357e426 202 {
203 aCtx->core11fwd->glDisable (GL_BLEND);
204
205 const OpenGl_AspectFace* anOldAspectFace = theWorkspace->SetAspectFace (myTextureParams);
c357e426 206 myBgTextureArray->Render (theWorkspace);
c357e426 207 theWorkspace->SetAspectFace (anOldAspectFace);
208 }
209
c357e426 210 if (wasUsedZBuffer)
211 {
212 theWorkspace->SetUseZBuffer (Standard_True);
213 aCtx->core11fwd->glEnable (GL_DEPTH_TEST);
214 }
215}
216
217//=======================================================================
218//function : Redraw
219//purpose :
220//=======================================================================
221void OpenGl_View::Redraw()
222{
7ccf8676 223 const Standard_Boolean wasDisabledMSAA = myToDisableMSAA;
224 const Standard_Boolean hadFboBlit = myHasFboBlit;
c357e426 225 if (myRenderParams.Method == Graphic3d_RM_RAYTRACING
226 && !myCaps->vboDisable
227 && !myCaps->keepArrayData)
228 {
229 if (myWasRedrawnGL)
230 {
231 myDeviceLostFlag = Standard_True;
232 }
233
234 myCaps->keepArrayData = Standard_True;
235 }
236
237 if (!myWorkspace->Activate())
238 {
239 return;
240 }
241
242 myWindow->SetSwapInterval();
243
244 ++myFrameCounter;
245 const Graphic3d_StereoMode aStereoMode = myRenderParams.StereoMode;
246 Graphic3d_Camera::Projection aProjectType = myCamera->ProjectionType();
247 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
248
249 // release pending GL resources
250 aCtx->ReleaseDelayed();
251
252 // fetch OpenGl context state
253 aCtx->FetchState();
254
75c262a9 255 // set resolution ratio
256 aCtx->SetResolutionRatio (RenderingParams().ResolutionRatio());
257
b128c892 258 OpenGl_FrameBuffer* aFrameBuffer = myFBO.operator->();
c357e426 259 bool toSwap = aCtx->IsRender()
260 && !aCtx->caps->buffersNoSwap
261 && aFrameBuffer == NULL;
262
263 Standard_Integer aSizeX = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeX() : myWindow->Width();
264 Standard_Integer aSizeY = aFrameBuffer != NULL ? aFrameBuffer->GetVPSizeY() : myWindow->Height();
265
3c4b62a4 266 // determine multisampling parameters
7ccf8676 267 Standard_Integer aNbSamples = !myToDisableMSAA
268 ? Max (Min (myRenderParams.NbMsaaSamples, aCtx->MaxMsaaSamples()), 0)
269 : 0;
3c4b62a4 270 if (aNbSamples != 0)
271 {
272 aNbSamples = OpenGl_Context::GetPowerOfTwo (aNbSamples, aCtx->MaxMsaaSamples());
273 }
274
c357e426 275 if ( aFrameBuffer == NULL
276 && !aCtx->DefaultFrameBuffer().IsNull()
277 && aCtx->DefaultFrameBuffer()->IsValid())
278 {
279 aFrameBuffer = aCtx->DefaultFrameBuffer().operator->();
280 }
281
282 if (myHasFboBlit
3c4b62a4 283 && (myTransientDrawToFront
284 || aProjectType == Graphic3d_Camera::Projection_Stereo
285 || aNbSamples != 0))
c357e426 286 {
287 if (myMainSceneFbos[0]->GetVPSizeX() != aSizeX
3c4b62a4 288 || myMainSceneFbos[0]->GetVPSizeY() != aSizeY
289 || myMainSceneFbos[0]->NbSamples() != aNbSamples)
c357e426 290 {
521b0d7f 291 if (!myTransientDrawToFront)
292 {
293 myImmediateSceneFbos[0]->Release (aCtx.operator->());
294 myImmediateSceneFbos[1]->Release (aCtx.operator->());
295 myImmediateSceneFbos[0]->ChangeViewport (0, 0);
296 myImmediateSceneFbos[1]->ChangeViewport (0, 0);
297 }
298
c357e426 299 // prepare FBOs containing main scene
300 // for further blitting and rendering immediate presentations on top
301 if (aCtx->core20fwd != NULL)
302 {
3c4b62a4 303 myMainSceneFbos[0]->Init (aCtx, aSizeX, aSizeY, myFboColorFormat, myFboDepthFormat, aNbSamples);
c357e426 304 }
521b0d7f 305 if (myTransientDrawToFront
306 && !aCtx->caps->useSystemBuffer
307 && myMainSceneFbos[0]->IsValid())
c357e426 308 {
3c4b62a4 309 myImmediateSceneFbos[0]->InitLazy (aCtx, *myMainSceneFbos[0]);
c357e426 310 }
311 }
312 }
313 else
314 {
315 myMainSceneFbos [0]->Release (aCtx.operator->());
316 myMainSceneFbos [1]->Release (aCtx.operator->());
317 myImmediateSceneFbos[0]->Release (aCtx.operator->());
318 myImmediateSceneFbos[1]->Release (aCtx.operator->());
319 myMainSceneFbos [0]->ChangeViewport (0, 0);
320 myMainSceneFbos [1]->ChangeViewport (0, 0);
321 myImmediateSceneFbos[0]->ChangeViewport (0, 0);
322 myImmediateSceneFbos[1]->ChangeViewport (0, 0);
323 }
324
325 if (aProjectType == Graphic3d_Camera::Projection_Stereo
326 && myMainSceneFbos[0]->IsValid())
327 {
3c4b62a4 328 myMainSceneFbos[1]->InitLazy (aCtx, *myMainSceneFbos[0]);
c357e426 329 if (!myMainSceneFbos[1]->IsValid())
330 {
331 // no enough memory?
332 aProjectType = Graphic3d_Camera::Projection_Perspective;
333 }
334 else if (!myTransientDrawToFront)
335 {
336 //
337 }
338 else if (!aCtx->HasStereoBuffers() || aStereoMode != Graphic3d_StereoMode_QuadBuffer)
339 {
3c4b62a4 340 myImmediateSceneFbos[0]->InitLazy (aCtx, *myMainSceneFbos[0]);
341 myImmediateSceneFbos[1]->InitLazy (aCtx, *myMainSceneFbos[0]);
c357e426 342 if (!myImmediateSceneFbos[0]->IsValid()
343 || !myImmediateSceneFbos[1]->IsValid())
344 {
345 aProjectType = Graphic3d_Camera::Projection_Perspective;
346 }
347 }
348 }
349
350 if (aProjectType == Graphic3d_Camera::Projection_Stereo)
351 {
352 OpenGl_FrameBuffer* aMainFbos[2] =
353 {
354 myMainSceneFbos[0]->IsValid() ? myMainSceneFbos[0].operator->() : NULL,
355 myMainSceneFbos[1]->IsValid() ? myMainSceneFbos[1].operator->() : NULL
356 };
357 OpenGl_FrameBuffer* anImmFbos[2] =
358 {
359 myImmediateSceneFbos[0]->IsValid() ? myImmediateSceneFbos[0].operator->() : NULL,
360 myImmediateSceneFbos[1]->IsValid() ? myImmediateSceneFbos[1].operator->() : NULL
361 };
362
363 if (!myTransientDrawToFront)
364 {
365 anImmFbos[0] = aMainFbos[0];
366 anImmFbos[1] = aMainFbos[1];
367 }
368 else if (aStereoMode == Graphic3d_StereoMode_SoftPageFlip
369 || aStereoMode == Graphic3d_StereoMode_QuadBuffer)
370 {
371 anImmFbos[0] = NULL;
372 anImmFbos[1] = NULL;
373 }
374
375 #if !defined(GL_ES_VERSION_2_0)
376 aCtx->SetReadDrawBuffer (aStereoMode == Graphic3d_StereoMode_QuadBuffer ? GL_BACK_LEFT : GL_BACK);
377 #endif
378 redraw (Graphic3d_Camera::Projection_MonoLeftEye, aMainFbos[0]);
379 myBackBufferRestored = Standard_True;
380 myIsImmediateDrawn = Standard_False;
381 #if !defined(GL_ES_VERSION_2_0)
382 aCtx->SetReadDrawBuffer (aStereoMode == Graphic3d_StereoMode_QuadBuffer ? GL_BACK_LEFT : GL_BACK);
383 #endif
b0dc79bc 384 if (!redrawImmediate (Graphic3d_Camera::Projection_MonoLeftEye, aMainFbos[0], anImmFbos[0]))
c357e426 385 {
386 toSwap = false;
387 }
388 else if (aStereoMode == Graphic3d_StereoMode_SoftPageFlip && toSwap)
389 {
390 aCtx->SwapBuffers();
391 }
392
393 #if !defined(GL_ES_VERSION_2_0)
394 aCtx->SetReadDrawBuffer (aStereoMode == Graphic3d_StereoMode_QuadBuffer ? GL_BACK_RIGHT : GL_BACK);
395 #endif
396 redraw (Graphic3d_Camera::Projection_MonoRightEye, aMainFbos[1]);
397 myBackBufferRestored = Standard_True;
398 myIsImmediateDrawn = Standard_False;
b0dc79bc 399 if (!redrawImmediate (Graphic3d_Camera::Projection_MonoRightEye, aMainFbos[1], anImmFbos[1]))
c357e426 400 {
401 toSwap = false;
402 }
403
404 if (anImmFbos[0] != NULL)
405 {
3c4b62a4 406 drawStereoPair (aFrameBuffer);
c357e426 407 }
408 }
409 else
410 {
3bffef55 411 OpenGl_FrameBuffer* aMainFbo = myMainSceneFbos[0]->IsValid() ? myMainSceneFbos[0].operator->() : aFrameBuffer;
c357e426 412 OpenGl_FrameBuffer* anImmFbo = aFrameBuffer;
413 if (!aCtx->caps->useSystemBuffer && myImmediateSceneFbos[0]->IsValid())
414 {
415 anImmFbo = myImmediateSceneFbos[0].operator->();
416 }
521b0d7f 417 if (!myTransientDrawToFront)
418 {
419 anImmFbo = aMainFbo;
420 }
c357e426 421
422 #if !defined(GL_ES_VERSION_2_0)
3bffef55 423 if (aMainFbo == NULL)
c357e426 424 {
425 aCtx->SetReadDrawBuffer (GL_BACK);
426 }
427 #endif
3bffef55 428 redraw (aProjectType, aMainFbo);
c357e426 429 myBackBufferRestored = Standard_True;
430 myIsImmediateDrawn = Standard_False;
431 if (!redrawImmediate (aProjectType, aMainFbo, anImmFbo))
432 {
433 toSwap = false;
434 }
435
436 if (anImmFbo != NULL
437 && anImmFbo != aFrameBuffer)
438 {
439 blitBuffers (anImmFbo, aFrameBuffer, myToFlipOutput);
440 }
441 }
442
443#if defined(_WIN32) && defined(HAVE_VIDEOCAPTURE)
444 if (OpenGl_AVIWriter_AllowWriting (myWindow->PlatformWindow()->NativeHandle()))
445 {
446 GLint params[4];
447 glGetIntegerv (GL_VIEWPORT, params);
448 int nWidth = params[2] & ~0x7;
449 int nHeight = params[3] & ~0x7;
450
451 const int nBitsPerPixel = 24;
452 GLubyte* aDumpData = new GLubyte[nWidth * nHeight * nBitsPerPixel / 8];
453
454 glPixelStorei (GL_PACK_ALIGNMENT, 1);
455 glReadPixels (0, 0, nWidth, nHeight, GL_BGR_EXT, GL_UNSIGNED_BYTE, aDumpData);
456 OpenGl_AVIWriter_AVIWriter (aDumpData, nWidth, nHeight, nBitsPerPixel);
457 delete[] aDumpData;
458 }
459#endif
460
bf02aa7d 461 if (myRenderParams.Method == Graphic3d_RM_RAYTRACING
462 && myRenderParams.IsGlobalIlluminationEnabled)
463 {
464 myAccumFrames++;
465 }
466
c357e426 467 // bind default FBO
468 bindDefaultFbo();
469
7ccf8676 470 if (wasDisabledMSAA != myToDisableMSAA
471 || hadFboBlit != myHasFboBlit)
472 {
473 // retry on error
474 Redraw();
475 }
476
c357e426 477 // Swap the buffers
478 if (toSwap)
479 {
480 aCtx->SwapBuffers();
481 if (!myMainSceneFbos[0]->IsValid())
482 {
483 myBackBufferRestored = Standard_False;
484 }
485 }
486 else
487 {
488 aCtx->core11fwd->glFlush();
489 }
490
491 // reset render mode state
492 aCtx->FetchState();
493
494 myWasRedrawnGL = Standard_True;
495}
496
497// =======================================================================
498// function : RedrawImmediate
499// purpose :
500// =======================================================================
501void OpenGl_View::RedrawImmediate()
502{
503 if (!myWorkspace->Activate())
504 return;
505
506 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
507 if (!myTransientDrawToFront
508 || !myBackBufferRestored
509 || (aCtx->caps->buffersNoSwap && !myMainSceneFbos[0]->IsValid()))
510 {
511 Redraw();
512 return;
513 }
514
515 const Graphic3d_StereoMode aStereoMode = myRenderParams.StereoMode;
516 Graphic3d_Camera::Projection aProjectType = myCamera->ProjectionType();
b128c892 517 OpenGl_FrameBuffer* aFrameBuffer = myFBO.operator->();
c357e426 518
519 if ( aFrameBuffer == NULL
520 && !aCtx->DefaultFrameBuffer().IsNull()
521 && aCtx->DefaultFrameBuffer()->IsValid())
522 {
523 aFrameBuffer = aCtx->DefaultFrameBuffer().operator->();
524 }
525
526 if (aProjectType == Graphic3d_Camera::Projection_Stereo)
527 {
528 if (myMainSceneFbos[0]->IsValid()
529 && !myMainSceneFbos[1]->IsValid())
530 {
531 aProjectType = Graphic3d_Camera::Projection_Perspective;
532 }
533 }
534
535 bool toSwap = false;
536 if (aProjectType == Graphic3d_Camera::Projection_Stereo)
537 {
538 OpenGl_FrameBuffer* aMainFbos[2] =
539 {
540 myMainSceneFbos[0]->IsValid() ? myMainSceneFbos[0].operator->() : NULL,
541 myMainSceneFbos[1]->IsValid() ? myMainSceneFbos[1].operator->() : NULL
542 };
543 OpenGl_FrameBuffer* anImmFbos[2] =
544 {
545 myImmediateSceneFbos[0]->IsValid() ? myImmediateSceneFbos[0].operator->() : NULL,
546 myImmediateSceneFbos[1]->IsValid() ? myImmediateSceneFbos[1].operator->() : NULL
547 };
548 if (aStereoMode == Graphic3d_StereoMode_SoftPageFlip
549 || aStereoMode == Graphic3d_StereoMode_QuadBuffer)
550 {
551 anImmFbos[0] = NULL;
552 anImmFbos[1] = NULL;
553 }
554
555 if (aCtx->arbFBO != NULL)
556 {
557 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
558 }
559 #if !defined(GL_ES_VERSION_2_0)
560 if (anImmFbos[0] == NULL)
561 {
562 aCtx->SetReadDrawBuffer (aStereoMode == Graphic3d_StereoMode_QuadBuffer ? GL_BACK_LEFT : GL_BACK);
563 }
564 #endif
565 toSwap = redrawImmediate (Graphic3d_Camera::Projection_MonoLeftEye,
566 aMainFbos[0],
567 anImmFbos[0],
568 Standard_True) || toSwap;
569 if (aStereoMode == Graphic3d_StereoMode_SoftPageFlip
570 && toSwap
571 && !aCtx->caps->buffersNoSwap)
572 {
573 aCtx->SwapBuffers();
574 }
575
576 if (aCtx->arbFBO != NULL)
577 {
578 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
579 }
580 #if !defined(GL_ES_VERSION_2_0)
581 if (anImmFbos[1] == NULL)
582 {
583 aCtx->SetReadDrawBuffer (aStereoMode == Graphic3d_StereoMode_QuadBuffer ? GL_BACK_RIGHT : GL_BACK);
584 }
585 #endif
586 toSwap = redrawImmediate (Graphic3d_Camera::Projection_MonoRightEye,
587 aMainFbos[1],
588 anImmFbos[1],
589 Standard_True) || toSwap;
590 if (anImmFbos[0] != NULL)
591 {
3c4b62a4 592 drawStereoPair (aFrameBuffer);
c357e426 593 }
594 }
595 else
596 {
597 OpenGl_FrameBuffer* aMainFbo = myMainSceneFbos[0]->IsValid() ? myMainSceneFbos[0].operator->() : NULL;
598 OpenGl_FrameBuffer* anImmFbo = aFrameBuffer;
599 if (!aCtx->caps->useSystemBuffer && myImmediateSceneFbos[0]->IsValid())
600 {
601 anImmFbo = myImmediateSceneFbos[0].operator->();
602 }
603 #if !defined(GL_ES_VERSION_2_0)
604 if (aMainFbo == NULL)
605 {
606 aCtx->SetReadDrawBuffer (GL_BACK);
607 }
608 #endif
609 toSwap = redrawImmediate (aProjectType,
610 aMainFbo,
611 anImmFbo,
612 Standard_True) || toSwap;
613 if (anImmFbo != NULL
614 && anImmFbo != aFrameBuffer)
615 {
616 blitBuffers (anImmFbo, aFrameBuffer, myToFlipOutput);
617 }
618 }
619
620 // bind default FBO
621 bindDefaultFbo();
622
623 if (toSwap && !aCtx->caps->buffersNoSwap)
624 {
625 aCtx->SwapBuffers();
626 }
627 else
628 {
629 aCtx->core11fwd->glFlush();
630 }
631
632 myWasRedrawnGL = Standard_True;
633}
634
635// =======================================================================
636// function : redraw
637// purpose :
638// =======================================================================
639void OpenGl_View::redraw (const Graphic3d_Camera::Projection theProjection, OpenGl_FrameBuffer* theReadDrawFbo)
640{
641 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
642 if (theReadDrawFbo != NULL)
643 {
644 theReadDrawFbo->BindBuffer (aCtx);
645 theReadDrawFbo->SetupViewport (aCtx);
646 }
647 else
648 {
3bffef55 649 const Standard_Integer aViewport[4] = { 0, 0, myWindow->Width(), myWindow->Height() };
650 aCtx->ResizeViewport (aViewport);
c357e426 651 }
652
653 // request reset of material
654 myWorkspace->NamedStatus |= OPENGL_NS_RESMAT;
655 myWorkspace->UseZBuffer() = Standard_True;
656 myWorkspace->UseDepthWrite() = Standard_True;
657 GLbitfield toClear = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
658 glDepthFunc (GL_LEQUAL);
659 glDepthMask (GL_TRUE);
660 glEnable (GL_DEPTH_TEST);
661
662#if !defined(GL_ES_VERSION_2_0)
663 glClearDepth (1.0);
664#else
665 glClearDepthf (1.0f);
666#endif
667
668 if (myWorkspace->NamedStatus & OPENGL_NS_WHITEBACK)
669 {
670 // set background to white
671 glClearColor (1.0f, 1.0f, 1.0f, 1.0f);
672 }
673 else
674 {
b6472664 675 const OpenGl_Vec4& aBgColor = myBgColor;
676 glClearColor (aBgColor.r(), aBgColor.g(), aBgColor.b(), 0.0f);
c357e426 677 }
678
679 glClear (toClear);
680
681 render (theProjection, theReadDrawFbo, Standard_False);
682}
683
684// =======================================================================
685// function : redrawMonoImmediate
686// purpose :
687// =======================================================================
688bool OpenGl_View::redrawImmediate (const Graphic3d_Camera::Projection theProjection,
689 OpenGl_FrameBuffer* theReadFbo,
690 OpenGl_FrameBuffer* theDrawFbo,
691 const Standard_Boolean theIsPartialUpdate)
692{
693 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
694 GLboolean toCopyBackToFront = GL_FALSE;
521b0d7f 695 if (theDrawFbo == theReadFbo
696 && theDrawFbo != NULL)
c357e426 697 {
698 myBackBufferRestored = Standard_False;
699 }
700 else if (theReadFbo != NULL
701 && theReadFbo->IsValid()
702 && aCtx->IsRender())
703 {
704 if (!blitBuffers (theReadFbo, theDrawFbo))
705 {
706 return true;
707 }
708 }
709 else if (theDrawFbo == NULL)
710 {
711 #if !defined(GL_ES_VERSION_2_0)
712 aCtx->core11fwd->glGetBooleanv (GL_DOUBLEBUFFER, &toCopyBackToFront);
713 #endif
714 if (toCopyBackToFront)
715 {
716 if (!HasImmediateStructures()
717 && !theIsPartialUpdate)
718 {
719 // prefer Swap Buffers within Redraw in compatibility mode (without FBO)
720 return true;
721 }
722 copyBackToFront();
723 }
724 else
725 {
726 myBackBufferRestored = Standard_False;
727 }
728 }
729 else
730 {
731 myBackBufferRestored = Standard_False;
732 }
733 myIsImmediateDrawn = Standard_True;
734
735 myWorkspace->UseZBuffer() = Standard_True;
736 myWorkspace->UseDepthWrite() = Standard_True;
737 glDepthFunc (GL_LEQUAL);
738 glDepthMask (GL_TRUE);
739 glEnable (GL_DEPTH_TEST);
740#if !defined(GL_ES_VERSION_2_0)
741 glClearDepth (1.0);
742#else
743 glClearDepthf (1.0f);
744#endif
745
746 render (theProjection, theDrawFbo, Standard_True);
747
748 return !toCopyBackToFront;
749}
750
751//=======================================================================
752//function : Render
753//purpose :
754//=======================================================================
755void OpenGl_View::render (Graphic3d_Camera::Projection theProjection,
756 OpenGl_FrameBuffer* theOutputFBO,
757 const Standard_Boolean theToDrawImmediate)
758{
759 // ==================================
760 // Step 1: Prepare for render
761 // ==================================
762
763 const Handle(OpenGl_Context)& aContext = myWorkspace->GetGlContext();
764
765#if !defined(GL_ES_VERSION_2_0)
766 // Disable current clipping planes
767 if (aContext->core11 != NULL)
768 {
769 const Standard_Integer aMaxPlanes = aContext->MaxClipPlanes();
770 for (Standard_Integer aClipPlaneId = GL_CLIP_PLANE0; aClipPlaneId < GL_CLIP_PLANE0 + aMaxPlanes; ++aClipPlaneId)
771 {
772 aContext->core11fwd->glDisable (aClipPlaneId);
773 }
774 }
775#endif
776
777 // Update states of OpenGl_BVHTreeSelector (frustum culling algorithm).
778 myBVHSelector.SetViewVolume (myCamera);
91d96372 779 myBVHSelector.SetViewportSize (myWindow->Width(), myWindow->Height());
c357e426 780
781 const Handle(OpenGl_ShaderManager)& aManager = aContext->ShaderManager();
782 if (StateInfo (myCurrLightSourceState, aManager->LightSourceState().Index()) != myLastLightSourceState)
783 {
016e5959 784 aManager->UpdateLightSourceStateTo (myShadingModel == Graphic3d_TOSM_NONE ? &myNoShadingLight : &myLights);
c357e426 785 myLastLightSourceState = StateInfo (myCurrLightSourceState, aManager->LightSourceState().Index());
786 }
787
788 // Update matrices if camera has changed.
789 Graphic3d_WorldViewProjState aWVPState = myCamera->WorldViewProjState();
790 const Standard_Boolean isCameraChanged = myWorldViewProjState != aWVPState;
791 const Standard_Boolean isSameView = aManager->IsSameView (this);
792 if (isCameraChanged)
793 {
794 aContext->ProjectionState.SetCurrent (myCamera->ProjectionMatrixF());
795 aContext->WorldViewState .SetCurrent (myCamera->OrientationMatrixF());
bf02aa7d 796 myAccumFrames = 0;
c357e426 797 }
798
799 // Apply new matrix state if camera has changed or this view differs from the one
800 // that was previously used for configuring matrices of shader manager
801 // (ApplyProjectionMatrix and ApplyWorldViewMatrix will affect the manager).
802 if (isCameraChanged || !isSameView)
803 {
804 aContext->ApplyProjectionMatrix();
805 aContext->ApplyWorldViewMatrix();
806 }
807
808 if (aManager->ModelWorldState().Index() == 0)
809 {
810 aContext->ShaderManager()->UpdateModelWorldStateTo (OpenGl_Mat4());
811 }
812
813 myWorldViewProjState = aWVPState;
814
815 // ====================================
816 // Step 2: Redraw background
817 // ====================================
818
819 // Render background
820 if (!theToDrawImmediate)
821 {
a521d90d 822 drawBackground (myWorkspace);
c357e426 823 }
824
825#if !defined(GL_ES_VERSION_2_0)
826 // Switch off lighting by default
827 if (aContext->core11 != NULL)
828 {
829 glDisable(GL_LIGHTING);
830 }
831#endif
832
833 // =================================
834 // Step 3: Redraw main plane
835 // =================================
836
837 // Setup face culling
838 GLboolean isCullFace = GL_FALSE;
839 if (myBackfacing != Graphic3d_TOBM_AUTOMATIC)
840 {
841 isCullFace = glIsEnabled (GL_CULL_FACE);
842 if (myBackfacing == Graphic3d_TOBM_DISABLE)
843 {
844 glEnable (GL_CULL_FACE);
845 glCullFace (GL_BACK);
846 }
847 else
848 glDisable (GL_CULL_FACE);
849 }
850
851#if !defined(GL_ES_VERSION_2_0)
852 // if the view is scaled normal vectors are scaled to unit
853 // length for correct displaying of shaded objects
854 const gp_Pnt anAxialScale = myCamera->AxialScale();
855 if (anAxialScale.X() != 1.F ||
856 anAxialScale.Y() != 1.F ||
857 anAxialScale.Z() != 1.F)
858 {
859 aContext->SetGlNormalizeEnabled (Standard_True);
860 }
861 else
862 {
863 aContext->SetGlNormalizeEnabled (Standard_False);
864 }
865
c357e426 866 // Apply InteriorShadingMethod
867 if (aContext->core11 != NULL)
868 {
869 aContext->core11->glShadeModel (myShadingModel == Graphic3d_TOSM_FACET
870 || myShadingModel == Graphic3d_TOSM_NONE ? GL_FLAT : GL_SMOOTH);
871 }
872#endif
873
874 aManager->SetShadingModel (myShadingModel);
c357e426 875
876 // Redraw 3d scene
877 if (theProjection == Graphic3d_Camera::Projection_MonoLeftEye)
878 {
879 aContext->ProjectionState.SetCurrent (myCamera->ProjectionStereoLeftF());
880 aContext->ApplyProjectionMatrix();
881 }
882 else if (theProjection == Graphic3d_Camera::Projection_MonoRightEye)
883 {
884 aContext->ProjectionState.SetCurrent (myCamera->ProjectionStereoRightF());
885 aContext->ApplyProjectionMatrix();
886 }
83da37b1 887
888 myWorkspace->SetEnvironmentTexture (myTextureEnv);
889
bf02aa7d 890 renderScene (theProjection, theOutputFBO, theToDrawImmediate);
c357e426 891
83da37b1 892 myWorkspace->SetEnvironmentTexture (Handle(OpenGl_Texture)());
893
c357e426 894 // ===============================
895 // Step 4: Trihedron
896 // ===============================
897
898 // Resetting GL parameters according to the default aspects
899 // in order to synchronize GL state with the graphic driver state
900 // before drawing auxiliary stuff (trihedrons, overlayer)
c357e426 901 myWorkspace->ResetAppliedAspect();
902
c357e426 903
deb02f86 904 // We need to disable (unbind) all shaders programs to ensure
905 // that all objects without specified aspect will be drawn
906 // correctly (such as background)
907 aContext->BindProgram (NULL);
c357e426 908
909 // Render trihedron
910 if (!theToDrawImmediate)
911 {
912 renderTrihedron (myWorkspace);
913
914 // Restore face culling
915 if (myBackfacing != Graphic3d_TOBM_AUTOMATIC)
916 {
917 if (isCullFace)
918 {
919 glEnable (GL_CULL_FACE);
920 glCullFace (GL_BACK);
921 }
922 else
923 glDisable (GL_CULL_FACE);
924 }
925 }
926
c357e426 927 // ==============================================================
928 // Step 6: Keep shader manager informed about last View
929 // ==============================================================
930
931 if (!aManager.IsNull())
932 {
933 aManager->SetLastView (this);
934 }
935}
936
937// =======================================================================
938// function : InvalidateBVHData
939// purpose :
940// =======================================================================
941void OpenGl_View::InvalidateBVHData (const Graphic3d_ZLayerId theLayerId)
942{
943 myZLayers.InvalidateBVHData (theLayerId);
944}
945
946//=======================================================================
947//function : renderStructs
948//purpose :
949//=======================================================================
bf02aa7d 950void OpenGl_View::renderStructs (Graphic3d_Camera::Projection theProjection,
951 OpenGl_FrameBuffer* theReadDrawFbo,
952 const Standard_Boolean theToDrawImmediate)
c357e426 953{
954 if ( myZLayers.NbStructures() <= 0 )
955 return;
956
957 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
c357e426 958 Standard_Boolean toRenderGL = theToDrawImmediate ||
959 myRenderParams.Method != Graphic3d_RM_RAYTRACING ||
960 myRaytraceInitStatus == OpenGl_RT_FAIL ||
961 aCtx->IsFeedback();
962
963 if (!toRenderGL)
964 {
965 toRenderGL = !initRaytraceResources (aCtx) ||
966 !updateRaytraceGeometry (OpenGl_GUM_CHECK, myId, aCtx);
967
968 toRenderGL |= !myIsRaytraceDataValid; // if no ray-trace data use OpenGL
969
970 if (!toRenderGL)
971 {
972 const Standard_Integer aSizeX = theReadDrawFbo != NULL ? theReadDrawFbo->GetVPSizeX() : myWindow->Width();
973 const Standard_Integer aSizeY = theReadDrawFbo != NULL ? theReadDrawFbo->GetVPSizeY() : myWindow->Height();
3c4b62a4 974 myOpenGlFBO ->InitLazy (aCtx, aSizeX, aSizeY, myFboColorFormat, myFboDepthFormat, 0);
c357e426 975
976 if (myRaytraceFilter.IsNull())
977 myRaytraceFilter = new OpenGl_RaytraceFilter;
978
979 myRaytraceFilter->SetPrevRenderFilter (myWorkspace->GetRenderFilter());
980
981 if (theReadDrawFbo != NULL)
982 theReadDrawFbo->UnbindBuffer (aCtx);
983
984 // Prepare preliminary OpenGL output
985 if (aCtx->arbFBOBlit != NULL)
986 {
987 // Render bottom OSD layer
988 myZLayers.Render (myWorkspace, theToDrawImmediate, OpenGl_LF_Bottom);
989
990 myWorkspace->SetRenderFilter (myRaytraceFilter);
991 {
992 if (theReadDrawFbo != NULL)
993 {
994 theReadDrawFbo->BindReadBuffer (aCtx);
995 }
996 else
997 {
998 aCtx->arbFBO->glBindFramebuffer (GL_READ_FRAMEBUFFER, 0);
999 }
1000
1001 myOpenGlFBO->BindDrawBuffer (aCtx);
1002
1003 aCtx->arbFBOBlit->glBlitFramebuffer (0, 0, aSizeX, aSizeY,
1004 0, 0, aSizeX, aSizeY,
1005 GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT,
1006 GL_NEAREST);
1007
1008 // Render non-polygonal elements in default layer
1009 myZLayers.Render (myWorkspace, theToDrawImmediate, OpenGl_LF_Default);
1010 }
1011 myWorkspace->SetRenderFilter (myRaytraceFilter->PrevRenderFilter());
1012 }
1013
1014 if (theReadDrawFbo != NULL)
1015 {
1016 theReadDrawFbo->BindBuffer (aCtx);
1017 }
1018 else
1019 {
1020 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, 0);
1021 }
1022
f55ba97f 1023 // Reset OpenGl aspects state to default to avoid enabling of
1024 // backface culling which is not supported in ray-tracing.
1025 myWorkspace->ResetAppliedAspect();
1026
c357e426 1027 // Ray-tracing polygonal primitive arrays
bf02aa7d 1028 raytrace (aSizeX, aSizeY, theProjection, theReadDrawFbo, aCtx);
c357e426 1029
1030 // Render upper (top and topmost) OpenGL layers
1031 myZLayers.Render (myWorkspace, theToDrawImmediate, OpenGl_LF_Upper);
1032 }
1033 }
1034
1035 // Redraw 3D scene using OpenGL in standard
1036 // mode or in case of ray-tracing failure
1037 if (toRenderGL)
1038 {
1039 myZLayers.Render (myWorkspace, theToDrawImmediate, OpenGl_LF_All);
1040
1041 // Set flag that scene was redrawn by standard pipeline
1042 myWasRedrawnGL = Standard_True;
1043 }
1044}
1045
1046//=======================================================================
1047//function : renderTrihedron
1048//purpose :
1049//=======================================================================
1050void OpenGl_View::renderTrihedron (const Handle(OpenGl_Workspace) &theWorkspace)
1051{
1052 // display global trihedron
1053 if (myToShowTrihedron)
1054 {
83da37b1 1055 // disable environment texture
1056 Handle(OpenGl_Texture) anEnvironmentTexture = theWorkspace->EnvironmentTexture();
1057 theWorkspace->SetEnvironmentTexture (Handle(OpenGl_Texture)());
1058
c357e426 1059 myTrihedron.Render (theWorkspace);
83da37b1 1060
1061 // restore environment texture
1062 theWorkspace->SetEnvironmentTexture (anEnvironmentTexture);
c357e426 1063 }
1064 if (myToShowGradTrihedron)
1065 {
1066 myGraduatedTrihedron.Render (theWorkspace);
1067 }
1068}
1069
1070// =======================================================================
1071// function : Invalidate
1072// purpose :
1073// =======================================================================
1074void OpenGl_View::Invalidate()
1075{
1076 myBackBufferRestored = Standard_False;
1077}
1078
1079//=======================================================================
1080//function : renderScene
1081//purpose :
1082//=======================================================================
bf02aa7d 1083void OpenGl_View::renderScene (Graphic3d_Camera::Projection theProjection,
1084 OpenGl_FrameBuffer* theReadDrawFbo,
1085 const Standard_Boolean theToDrawImmediate)
c357e426 1086{
1087 const Handle(OpenGl_Context)& aContext = myWorkspace->GetGlContext();
1088
c357e426 1089 // Specify clipping planes in view transformation space
3202bf1e 1090 aContext->ChangeClipping().Reset (aContext, myClipPlanes);
1091 if (!myClipPlanes.IsNull()
1092 && !myClipPlanes->IsEmpty())
c357e426 1093 {
deb02f86 1094 aContext->ShaderManager()->UpdateClippingState();
c357e426 1095 }
1096
1097#if !defined(GL_ES_VERSION_2_0)
1098 // Apply Lights
1099 if (aContext->core11 != NULL)
1100 {
1101 // setup lights
1102 Graphic3d_Vec4 anAmbientColor (THE_DEFAULT_AMBIENT[0],
1103 THE_DEFAULT_AMBIENT[1],
1104 THE_DEFAULT_AMBIENT[2],
1105 THE_DEFAULT_AMBIENT[3]);
1106 GLenum aLightGlId = GL_LIGHT0;
1107
016e5959 1108 OpenGl_ListOfLight::Iterator aLightIt (myShadingModel == Graphic3d_TOSM_NONE ? myNoShadingLight : myLights);
c357e426 1109 for (; aLightIt.More(); aLightIt.Next())
1110 {
1111 bindLight (aLightIt.Value(), aLightGlId, anAmbientColor, myWorkspace);
1112 }
1113
1114 // apply accumulated ambient color
1115 anAmbientColor.a() = 1.0f;
1116 glLightModelfv (GL_LIGHT_MODEL_AMBIENT, anAmbientColor.GetData());
1117
1118 if (aLightGlId != GL_LIGHT0)
1119 {
1120 glEnable (GL_LIGHTING);
1121 }
1122 // switch off unused lights
1123 for (; aLightGlId <= GL_LIGHT7; ++aLightGlId)
1124 {
1125 glDisable (aLightGlId);
1126 }
1127 }
1128#endif
1129
1130 // Clear status bitfields
1131 myWorkspace->NamedStatus &= ~(OPENGL_NS_2NDPASSNEED | OPENGL_NS_2NDPASSDO);
1132
83da37b1 1133 // First pass
1134 renderStructs (theProjection, theReadDrawFbo, theToDrawImmediate);
1135 myWorkspace->DisableTexture();
c357e426 1136
83da37b1 1137 // Second pass
1138 if (myWorkspace->NamedStatus & OPENGL_NS_2NDPASSNEED)
c357e426 1139 {
83da37b1 1140 myWorkspace->NamedStatus |= OPENGL_NS_2NDPASSDO;
c357e426 1141
83da37b1 1142 // Remember OpenGl properties
1143 GLint aSaveBlendDst = GL_ONE_MINUS_SRC_ALPHA, aSaveBlendSrc = GL_SRC_ALPHA;
1144 GLint aSaveZbuffFunc;
1145 GLboolean aSaveZbuffWrite;
1146 glGetBooleanv (GL_DEPTH_WRITEMASK, &aSaveZbuffWrite);
1147 glGetIntegerv (GL_DEPTH_FUNC, &aSaveZbuffFunc);
1148 #if !defined(GL_ES_VERSION_2_0)
1149 glGetIntegerv (GL_BLEND_DST, &aSaveBlendDst);
1150 glGetIntegerv (GL_BLEND_SRC, &aSaveBlendSrc);
1151 #endif
1152 GLboolean wasZbuffEnabled = glIsEnabled (GL_DEPTH_TEST);
1153 GLboolean wasBlendEnabled = glIsEnabled (GL_BLEND);
c357e426 1154
83da37b1 1155 // Change the properties for second rendering pass
1156 glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1157 glEnable (GL_BLEND);
c357e426 1158
83da37b1 1159 glDepthFunc (GL_EQUAL);
1160 glDepthMask (GL_FALSE);
1161 glEnable (GL_DEPTH_TEST);
c357e426 1162
83da37b1 1163 // Render the view
1164 renderStructs (theProjection, theReadDrawFbo, theToDrawImmediate);
1165 myWorkspace->DisableTexture();
1166
1167 // Restore properties back
1168 glBlendFunc (aSaveBlendSrc, aSaveBlendDst);
1169 if (!wasBlendEnabled)
1170 glDisable (GL_BLEND);
1171
1172 glDepthFunc (aSaveZbuffFunc);
1173 glDepthMask (aSaveZbuffWrite);
1174 if (!wasZbuffEnabled)
1175 glDisable (GL_DEPTH_FUNC);
c357e426 1176 }
1177
1178 // Apply restored view matrix.
1179 aContext->ApplyWorldViewMatrix();
1180
3202bf1e 1181 aContext->ChangeClipping().Reset (aContext, Handle(Graphic3d_SequenceOfHClipPlane)());
1182 if (!myClipPlanes.IsNull()
1183 && !myClipPlanes->IsEmpty())
deb02f86 1184 {
1185 aContext->ShaderManager()->RevertClippingState();
deb02f86 1186 }
c357e426 1187}
1188
1189// =======================================================================
1190// function : bindDefaultFbo
1191// purpose :
1192// =======================================================================
1193void OpenGl_View::bindDefaultFbo (OpenGl_FrameBuffer* theCustomFbo)
1194{
1195 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
1196 OpenGl_FrameBuffer* anFbo = (theCustomFbo != NULL && theCustomFbo->IsValid())
1197 ? theCustomFbo
1198 : (!aCtx->DefaultFrameBuffer().IsNull()
1199 && aCtx->DefaultFrameBuffer()->IsValid()
1200 ? aCtx->DefaultFrameBuffer().operator->()
1201 : NULL);
1202 if (anFbo != NULL)
1203 {
1204 anFbo->BindBuffer (aCtx);
521b0d7f 1205 anFbo->SetupViewport (aCtx);
c357e426 1206 }
1207 else
1208 {
1209 #if !defined(GL_ES_VERSION_2_0)
1210 aCtx->SetReadDrawBuffer (GL_BACK);
1211 #else
1212 if (aCtx->arbFBO != NULL)
1213 {
1214 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
1215 }
1216 #endif
3bffef55 1217 const Standard_Integer aViewport[4] = { 0, 0, myWindow->Width(), myWindow->Height() };
1218 aCtx->ResizeViewport (aViewport);
c357e426 1219 }
c357e426 1220}
1221
1222// =======================================================================
1223// function : initBlitQuad
1224// purpose :
1225// =======================================================================
1226OpenGl_VertexBuffer* OpenGl_View::initBlitQuad (const Standard_Boolean theToFlip)
1227{
1228 OpenGl_VertexBuffer* aVerts = NULL;
1229 if (!theToFlip)
1230 {
1231 aVerts = &myFullScreenQuad;
1232 if (!aVerts->IsValid())
1233 {
1234 OpenGl_Vec4 aQuad[4] =
1235 {
1236 OpenGl_Vec4( 1.0f, -1.0f, 1.0f, 0.0f),
1237 OpenGl_Vec4( 1.0f, 1.0f, 1.0f, 1.0f),
1238 OpenGl_Vec4(-1.0f, -1.0f, 0.0f, 0.0f),
1239 OpenGl_Vec4(-1.0f, 1.0f, 0.0f, 1.0f)
1240 };
1241 aVerts->Init (myWorkspace->GetGlContext(), 4, 4, aQuad[0].GetData());
1242 }
1243 }
1244 else
1245 {
1246 aVerts = &myFullScreenQuadFlip;
1247 if (!aVerts->IsValid())
1248 {
1249 OpenGl_Vec4 aQuad[4] =
1250 {
1251 OpenGl_Vec4( 1.0f, -1.0f, 1.0f, 1.0f),
1252 OpenGl_Vec4( 1.0f, 1.0f, 1.0f, 0.0f),
1253 OpenGl_Vec4(-1.0f, -1.0f, 0.0f, 1.0f),
1254 OpenGl_Vec4(-1.0f, 1.0f, 0.0f, 0.0f)
1255 };
1256 aVerts->Init (myWorkspace->GetGlContext(), 4, 4, aQuad[0].GetData());
1257 }
1258 }
1259 return aVerts;
1260}
1261
1262// =======================================================================
1263// function : blitBuffers
1264// purpose :
1265// =======================================================================
1266bool OpenGl_View::blitBuffers (OpenGl_FrameBuffer* theReadFbo,
1267 OpenGl_FrameBuffer* theDrawFbo,
1268 const Standard_Boolean theToFlip)
1269{
1270 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
1271 if (theReadFbo == NULL || aCtx->IsFeedback())
1272 {
1273 return false;
1274 }
1275 else if (theReadFbo == theDrawFbo)
1276 {
1277 return true;
1278 }
1279
1280 // clear destination before blitting
1281 if (theDrawFbo != NULL
1282 && theDrawFbo->IsValid())
1283 {
1284 theDrawFbo->BindBuffer (aCtx);
1285 }
1286 else
1287 {
1288 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
1289 }
1290#if !defined(GL_ES_VERSION_2_0)
1291 aCtx->core20fwd->glClearDepth (1.0);
1292#else
1293 aCtx->core20fwd->glClearDepthf (1.0f);
1294#endif
1295 aCtx->core20fwd->glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
1296
3c4b62a4 1297#if !defined(GL_ES_VERSION_2_0)
1298 if (aCtx->arbFBOBlit != NULL
1299 && theReadFbo->NbSamples() != 0)
c357e426 1300 {
3c4b62a4 1301 GLbitfield aCopyMask = 0;
c357e426 1302 theReadFbo->BindReadBuffer (aCtx);
1303 if (theDrawFbo != NULL
1304 && theDrawFbo->IsValid())
1305 {
1306 theDrawFbo->BindDrawBuffer (aCtx);
3c4b62a4 1307 if (theDrawFbo->HasColor()
1308 && theReadFbo->HasColor())
1309 {
1310 aCopyMask |= GL_COLOR_BUFFER_BIT;
1311 }
1312 if (theDrawFbo->HasDepth()
1313 && theReadFbo->HasDepth())
1314 {
1315 aCopyMask |= GL_DEPTH_BUFFER_BIT;
1316 }
c357e426 1317 }
1318 else
1319 {
3c4b62a4 1320 if (theReadFbo->HasColor())
1321 {
1322 aCopyMask |= GL_COLOR_BUFFER_BIT;
1323 }
1324 if (theReadFbo->HasDepth())
1325 {
1326 aCopyMask |= GL_DEPTH_BUFFER_BIT;
1327 }
c357e426 1328 aCtx->arbFBO->glBindFramebuffer (GL_DRAW_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
1329 }
3c4b62a4 1330
c357e426 1331 // we don't copy stencil buffer here... does it matter for performance?
1332 aCtx->arbFBOBlit->glBlitFramebuffer (0, 0, theReadFbo->GetVPSizeX(), theReadFbo->GetVPSizeY(),
1333 0, 0, theReadFbo->GetVPSizeX(), theReadFbo->GetVPSizeY(),
3c4b62a4 1334 aCopyMask, GL_NEAREST);
7ccf8676 1335 const int anErr = ::glGetError();
1336 if (anErr != GL_NO_ERROR)
1337 {
1338 // glBlitFramebuffer() might fail in several cases:
1339 // - Both FBOs have MSAA and they are samples number does not match.
1340 // OCCT checks that this does not happen,
1341 // however some graphics drivers provide an option for overriding MSAA.
1342 // In this case window MSAA might be non-zero (and application can not check it)
1343 // and might not match MSAA of our offscreen FBOs.
1344 // - Pixel formats of FBOs do not match.
1345 // This also might happen with window has pixel format,
1346 // e.g. Mesa fails blitting RGBA8 -> RGB8 while other drivers support this conversion.
1347 TCollection_ExtendedString aMsg = TCollection_ExtendedString() + "FBO blitting has failed [Error #" + anErr + "]\n"
1348 + " Please check your graphics driver settings or try updating driver.";
1349 if (theReadFbo->NbSamples() != 0)
1350 {
1351 myToDisableMSAA = true;
1352 aMsg += "\n MSAA settings should not be overridden by driver!";
1353 }
1354 aCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
1355 GL_DEBUG_TYPE_ERROR,
1356 0,
1357 GL_DEBUG_SEVERITY_HIGH,
1358 aMsg);
1359 }
1360
c357e426 1361 if (theDrawFbo != NULL
3c4b62a4 1362 && theDrawFbo->IsValid())
c357e426 1363 {
1364 theDrawFbo->BindBuffer (aCtx);
1365 }
1366 else
1367 {
1368 aCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
1369 }
1370 }
1371 else
3c4b62a4 1372#endif
c357e426 1373 {
1374 aCtx->core20fwd->glDepthFunc (GL_ALWAYS);
1375 aCtx->core20fwd->glDepthMask (GL_TRUE);
1376 aCtx->core20fwd->glEnable (GL_DEPTH_TEST);
1ce0716b 1377 #if defined(GL_ES_VERSION_2_0)
1378 if (!aCtx->IsGlGreaterEqual (3, 0)
1379 && !aCtx->extFragDepth)
1380 {
1381 aCtx->core20fwd->glDisable (GL_DEPTH_TEST);
1382 }
1383 #endif
c357e426 1384
1385 myWorkspace->DisableTexture();
1386
1387 OpenGl_VertexBuffer* aVerts = initBlitQuad (theToFlip);
1388 const Handle(OpenGl_ShaderManager)& aManager = aCtx->ShaderManager();
1389 if (aVerts->IsValid()
1390 && aManager->BindFboBlitProgram())
1391 {
1392 theReadFbo->ColorTexture() ->Bind (aCtx, GL_TEXTURE0 + 0);
1393 theReadFbo->DepthStencilTexture()->Bind (aCtx, GL_TEXTURE0 + 1);
1394 aVerts->BindVertexAttrib (aCtx, Graphic3d_TOA_POS);
1395
1396 aCtx->core20fwd->glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
1397
1398 aVerts->UnbindVertexAttrib (aCtx, Graphic3d_TOA_POS);
1399 theReadFbo->DepthStencilTexture()->Unbind (aCtx, GL_TEXTURE0 + 1);
1400 theReadFbo->ColorTexture() ->Unbind (aCtx, GL_TEXTURE0 + 0);
a521d90d 1401 aCtx->BindProgram (NULL);
c357e426 1402 }
1403 else
1404 {
1405 TCollection_ExtendedString aMsg = TCollection_ExtendedString()
1406 + "Error! FBO blitting has failed";
3b523c4c 1407 aCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
1408 GL_DEBUG_TYPE_ERROR,
c357e426 1409 0,
3b523c4c 1410 GL_DEBUG_SEVERITY_HIGH,
c357e426 1411 aMsg);
1412 myHasFboBlit = Standard_False;
1413 theReadFbo->Release (aCtx.operator->());
1414 return true;
1415 }
1416 }
1417 return true;
1418}
1419
1420// =======================================================================
1421// function : drawStereoPair
1422// purpose :
1423// =======================================================================
3c4b62a4 1424void OpenGl_View::drawStereoPair (OpenGl_FrameBuffer* theDrawFbo)
c357e426 1425{
3c4b62a4 1426 const Handle(OpenGl_Context)& aCtx = myWorkspace->GetGlContext();
1427 bindDefaultFbo (theDrawFbo);
c357e426 1428 OpenGl_FrameBuffer* aPair[2] =
1429 {
1430 myImmediateSceneFbos[0]->IsValid() ? myImmediateSceneFbos[0].operator->() : NULL,
1431 myImmediateSceneFbos[1]->IsValid() ? myImmediateSceneFbos[1].operator->() : NULL
1432 };
1433 if (aPair[0] == NULL
1434 || aPair[1] == NULL
1435 || !myTransientDrawToFront)
1436 {
1437 aPair[0] = myMainSceneFbos[0]->IsValid() ? myMainSceneFbos[0].operator->() : NULL;
1438 aPair[1] = myMainSceneFbos[1]->IsValid() ? myMainSceneFbos[1].operator->() : NULL;
1439 }
1440
1441 if (aPair[0] == NULL
1442 || aPair[1] == NULL)
1443 {
1444 return;
1445 }
1446
3c4b62a4 1447 if (aPair[0]->NbSamples() != 0)
1448 {
1449 // resolve MSAA buffers before drawing
1450 if (!myOpenGlFBO ->InitLazy (aCtx, aPair[0]->GetVPSizeX(), aPair[0]->GetVPSizeY(), myFboColorFormat, myFboDepthFormat, 0)
1451 || !myOpenGlFBO2->InitLazy (aCtx, aPair[0]->GetVPSizeX(), aPair[0]->GetVPSizeY(), myFboColorFormat, 0, 0))
1452 {
82f443b6 1453 aCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
1454 GL_DEBUG_TYPE_ERROR,
3c4b62a4 1455 0,
82f443b6 1456 GL_DEBUG_SEVERITY_HIGH,
3c4b62a4 1457 "Error! Unable to allocate FBO for blitting stereo pair");
1458 bindDefaultFbo (theDrawFbo);
1459 return;
1460 }
1461
1462 if (!blitBuffers (aPair[0], myOpenGlFBO .operator->(), Standard_False)
1463 || !blitBuffers (aPair[1], myOpenGlFBO2.operator->(), Standard_False))
1464 {
1465 bindDefaultFbo (theDrawFbo);
1466 return;
1467 }
1468
1469 aPair[0] = myOpenGlFBO .operator->();
1470 aPair[1] = myOpenGlFBO2.operator->();
1471 bindDefaultFbo (theDrawFbo);
1472 }
1473
c357e426 1474 struct
1475 {
1476 Standard_Integer left;
1477 Standard_Integer top;
1478 Standard_Integer right;
1479 Standard_Integer bottom;
1480 Standard_Integer dx() { return right - left; }
1481 Standard_Integer dy() { return bottom - top; }
1482 } aGeom;
1483
1484 myWindow->PlatformWindow()->Position (aGeom.left, aGeom.top, aGeom.right, aGeom.bottom);
1485
1486 Standard_Boolean toReverse = myRenderParams.ToReverseStereo;
1487 const Standard_Boolean isOddY = (aGeom.top + aGeom.dy()) % 2 == 1;
1488 const Standard_Boolean isOddX = aGeom.left % 2 == 1;
1489 if (isOddY
1490 && (myRenderParams.StereoMode == Graphic3d_StereoMode_RowInterlaced
1491 || myRenderParams.StereoMode == Graphic3d_StereoMode_ChessBoard))
1492 {
1493 toReverse = !toReverse;
1494 }
1495 if (isOddX
1496 && (myRenderParams.StereoMode == Graphic3d_StereoMode_ColumnInterlaced
1497 || myRenderParams.StereoMode == Graphic3d_StereoMode_ChessBoard))
1498 {
1499 toReverse = !toReverse;
1500 }
1501
1502 if (toReverse)
1503 {
1504 std::swap (aPair[0], aPair[1]);
1505 }
1506
c357e426 1507 aCtx->core20fwd->glDepthFunc (GL_ALWAYS);
1508 aCtx->core20fwd->glDepthMask (GL_TRUE);
1509 aCtx->core20fwd->glEnable (GL_DEPTH_TEST);
1510
1511 myWorkspace->DisableTexture();
1512 OpenGl_VertexBuffer* aVerts = initBlitQuad (myToFlipOutput);
1513
1514 const Handle(OpenGl_ShaderManager)& aManager = aCtx->ShaderManager();
1515 if (aVerts->IsValid()
1516 && aManager->BindStereoProgram (myRenderParams.StereoMode))
1517 {
1518 if (myRenderParams.StereoMode == Graphic3d_StereoMode_Anaglyph)
1519 {
1520 OpenGl_Mat4 aFilterL, aFilterR;
1521 aFilterL.SetDiagonal (Graphic3d_Vec4 (0.0f, 0.0f, 0.0f, 0.0f));
1522 aFilterR.SetDiagonal (Graphic3d_Vec4 (0.0f, 0.0f, 0.0f, 0.0f));
1523 switch (myRenderParams.AnaglyphFilter)
1524 {
1525 case Graphic3d_RenderingParams::Anaglyph_RedCyan_Simple:
1526 {
1527 aFilterL.SetRow (0, Graphic3d_Vec4 (1.0f, 0.0f, 0.0f, 0.0f));
1528 aFilterR.SetRow (1, Graphic3d_Vec4 (0.0f, 1.0f, 0.0f, 0.0f));
1529 aFilterR.SetRow (2, Graphic3d_Vec4 (0.0f, 0.0f, 1.0f, 0.0f));
1530 break;
1531 }
1532 case Graphic3d_RenderingParams::Anaglyph_RedCyan_Optimized:
1533 {
1534 aFilterL.SetRow (0, Graphic3d_Vec4 ( 0.4154f, 0.4710f, 0.16666667f, 0.0f));
1535 aFilterL.SetRow (1, Graphic3d_Vec4 (-0.0458f, -0.0484f, -0.0257f, 0.0f));
1536 aFilterL.SetRow (2, Graphic3d_Vec4 (-0.0547f, -0.0615f, 0.0128f, 0.0f));
1537 aFilterL.SetRow (3, Graphic3d_Vec4 ( 0.0f, 0.0f, 0.0f, 0.0f));
1538 aFilterR.SetRow (0, Graphic3d_Vec4 (-0.01090909f, -0.03636364f, -0.00606061f, 0.0f));
1539 aFilterR.SetRow (1, Graphic3d_Vec4 ( 0.37560000f, 0.73333333f, 0.01111111f, 0.0f));
1540 aFilterR.SetRow (2, Graphic3d_Vec4 (-0.06510000f, -0.12870000f, 1.29710000f, 0.0f));
1541 aFilterR.SetRow (3, Graphic3d_Vec4 ( 0.0f, 0.0f, 0.0f, 0.0f));
1542 break;
1543 }
1544 case Graphic3d_RenderingParams::Anaglyph_YellowBlue_Simple:
1545 {
1546 aFilterL.SetRow (0, Graphic3d_Vec4 (1.0f, 0.0f, 0.0f, 0.0f));
1547 aFilterL.SetRow (1, Graphic3d_Vec4 (0.0f, 1.0f, 0.0f, 0.0f));
1548 aFilterR.SetRow (2, Graphic3d_Vec4 (0.0f, 0.0f, 1.0f, 0.0f));
1549 break;
1550 }
1551 case Graphic3d_RenderingParams::Anaglyph_YellowBlue_Optimized:
1552 {
1553 aFilterL.SetRow (0, Graphic3d_Vec4 ( 1.062f, -0.205f, 0.299f, 0.0f));
1554 aFilterL.SetRow (1, Graphic3d_Vec4 (-0.026f, 0.908f, 0.068f, 0.0f));
1555 aFilterL.SetRow (2, Graphic3d_Vec4 (-0.038f, -0.173f, 0.022f, 0.0f));
1556 aFilterL.SetRow (3, Graphic3d_Vec4 ( 0.0f, 0.0f, 0.0f, 0.0f));
1557 aFilterR.SetRow (0, Graphic3d_Vec4 (-0.016f, -0.123f, -0.017f, 0.0f));
1558 aFilterR.SetRow (1, Graphic3d_Vec4 ( 0.006f, 0.062f, -0.017f, 0.0f));
1559 aFilterR.SetRow (2, Graphic3d_Vec4 ( 0.094f, 0.185f, 0.911f, 0.0f));
1560 aFilterR.SetRow (3, Graphic3d_Vec4 ( 0.0f, 0.0f, 0.0f, 0.0f));
1561 break;
1562 }
1563 case Graphic3d_RenderingParams::Anaglyph_GreenMagenta_Simple:
1564 {
1565 aFilterR.SetRow (0, Graphic3d_Vec4 (1.0f, 0.0f, 0.0f, 0.0f));
1566 aFilterL.SetRow (1, Graphic3d_Vec4 (0.0f, 1.0f, 0.0f, 0.0f));
1567 aFilterR.SetRow (2, Graphic3d_Vec4 (0.0f, 0.0f, 1.0f, 0.0f));
1568 break;
1569 }
1570 case Graphic3d_RenderingParams::Anaglyph_UserDefined:
1571 {
1572 aFilterL = myRenderParams.AnaglyphLeft;
1573 aFilterR = myRenderParams.AnaglyphRight;
1574 break;
1575 }
1576 }
1577 aCtx->ActiveProgram()->SetUniform (aCtx, "uMultL", aFilterL);
1578 aCtx->ActiveProgram()->SetUniform (aCtx, "uMultR", aFilterR);
1579 }
1580
1581 aPair[0]->ColorTexture()->Bind (aCtx, GL_TEXTURE0 + 0);
1582 aPair[1]->ColorTexture()->Bind (aCtx, GL_TEXTURE0 + 1);
1583 aVerts->BindVertexAttrib (aCtx, 0);
1584
1585 aCtx->core20fwd->glDrawArrays (GL_TRIANGLE_STRIP, 0, 4);
1586
1587 aVerts->UnbindVertexAttrib (aCtx, 0);
1588 aPair[1]->ColorTexture()->Unbind (aCtx, GL_TEXTURE0 + 1);
1589 aPair[0]->ColorTexture()->Unbind (aCtx, GL_TEXTURE0 + 0);
1590 }
1591 else
1592 {
1593 TCollection_ExtendedString aMsg = TCollection_ExtendedString()
1594 + "Error! Anaglyph has failed";
3b523c4c 1595 aCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
1596 GL_DEBUG_TYPE_ERROR,
c357e426 1597 0,
3b523c4c 1598 GL_DEBUG_SEVERITY_HIGH,
c357e426 1599 aMsg);
1600 }
1601}
1602
1603// =======================================================================
1604// function : copyBackToFront
1605// purpose :
1606// =======================================================================
1607void OpenGl_View::copyBackToFront()
1608{
1609#if !defined(GL_ES_VERSION_2_0)
1610
1611 OpenGl_Mat4 aProjectMat;
1612 Graphic3d_TransformUtils::Ortho2D (aProjectMat,
1613 0.f, static_cast<GLfloat> (myWindow->Width()), 0.f, static_cast<GLfloat> (myWindow->Height()));
1614
1615 Handle(OpenGl_Context) aCtx = myWorkspace->GetGlContext();
1616 aCtx->WorldViewState.Push();
1617 aCtx->ProjectionState.Push();
1618
1619 aCtx->WorldViewState.SetIdentity();
1620 aCtx->ProjectionState.SetCurrent (aProjectMat);
1621
1622 aCtx->ApplyProjectionMatrix();
1623 aCtx->ApplyWorldViewMatrix();
1624
1625 aCtx->DisableFeatures();
1626
1627 switch (aCtx->DrawBuffer())
1628 {
1629 case GL_BACK_LEFT:
1630 {
1631 aCtx->SetReadBuffer (GL_BACK_LEFT);
1632 aCtx->SetDrawBuffer (GL_FRONT_LEFT);
1633 break;
1634 }
1635 case GL_BACK_RIGHT:
1636 {
1637 aCtx->SetReadBuffer (GL_BACK_RIGHT);
1638 aCtx->SetDrawBuffer (GL_FRONT_RIGHT);
1639 break;
1640 }
1641 default:
1642 {
1643 aCtx->SetReadBuffer (GL_BACK);
1644 aCtx->SetDrawBuffer (GL_FRONT);
1645 break;
1646 }
1647 }
1648
1649 glRasterPos2i (0, 0);
1650 glCopyPixels (0, 0, myWindow->Width() + 1, myWindow->Height() + 1, GL_COLOR);
1651 //glCopyPixels (0, 0, myWidth + 1, myHeight + 1, GL_DEPTH);
1652
1653 aCtx->EnableFeatures();
1654
1655 aCtx->WorldViewState.Pop();
1656 aCtx->ProjectionState.Pop();
1657 aCtx->ApplyProjectionMatrix();
1658
1659 // read/write from front buffer now
1660 aCtx->SetReadBuffer (aCtx->DrawBuffer());
1661#endif
1662 myIsImmediateDrawn = Standard_False;
1663}
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