1 // Created on: 2015-01-16
2 // Created by: Anastasia BORISOVA
3 // Copyright (c) 2015 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
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.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #include <OpenGl_BackgroundArray.hxx>
18 #include <Aspect_FillMethod.hxx>
19 #include <NCollection_AlignedAllocator.hxx>
20 #include <OpenGl_Texture.hxx>
21 #include <OpenGl_View.hxx>
22 #include <Graphic3d_TextureParams.hxx>
24 // =======================================================================
25 // method : Constructor
27 // =======================================================================
28 OpenGl_BackgroundArray::OpenGl_BackgroundArray (const Graphic3d_TypeOfBackground theType)
29 : OpenGl_PrimitiveArray (NULL, Graphic3d_TOPA_TRIANGLESTRIPS, NULL, NULL, NULL),
30 myTrsfPers (Graphic3d_TMF_2d, theType == Graphic3d_TOB_TEXTURE ? Aspect_TOTP_CENTER : Aspect_TOTP_LEFT_LOWER),
32 myFillMethod (Aspect_FM_NONE),
35 myToUpdate (Standard_False)
37 Handle(NCollection_AlignedAllocator) anAlloc = new NCollection_AlignedAllocator (16);
38 myAttribs = new Graphic3d_Buffer (anAlloc);
40 myDrawMode = GL_TRIANGLE_STRIP;
42 myGradientParams.color1 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
43 myGradientParams.color2 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
44 myGradientParams.type = Aspect_GFM_NONE;
47 // =======================================================================
48 // method : SetTextureParameters
50 // =======================================================================
51 void OpenGl_BackgroundArray::SetTextureParameters (const Aspect_FillMethod theFillMethod)
53 if (myType != Graphic3d_TOB_TEXTURE)
58 myFillMethod = theFillMethod;
62 // =======================================================================
63 // method : SetTextureFillMethod
65 // =======================================================================
66 void OpenGl_BackgroundArray::SetTextureFillMethod (const Aspect_FillMethod theFillMethod)
68 myFillMethod = theFillMethod;
72 // =======================================================================
73 // method : SetGradientParameters
75 // =======================================================================
76 void OpenGl_BackgroundArray::SetGradientParameters (const Quantity_Color& theColor1,
77 const Quantity_Color& theColor2,
78 const Aspect_GradientFillMethod theType)
80 if (myType != Graphic3d_TOB_GRADIENT)
85 Standard_Real anR, aG, aB;
86 theColor1.Values (anR, aG, aB, Quantity_TOC_RGB);
87 myGradientParams.color1 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
89 theColor2.Values (anR, aG, aB, Quantity_TOC_RGB);
90 myGradientParams.color2 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
92 myGradientParams.type = theType;
96 // =======================================================================
97 // method : SetGradientFillMethod
99 // =======================================================================
100 void OpenGl_BackgroundArray::SetGradientFillMethod (const Aspect_GradientFillMethod theType)
102 if (myType != Graphic3d_TOB_GRADIENT)
107 myGradientParams.type = theType;
111 // =======================================================================
112 // method : IsDefined
114 // =======================================================================
115 bool OpenGl_BackgroundArray::IsDefined() const
119 case Graphic3d_TOB_GRADIENT: return myGradientParams.type != Aspect_GFM_NONE;
120 case Graphic3d_TOB_TEXTURE: return myFillMethod != Aspect_FM_NONE;
121 case Graphic3d_TOB_NONE: return Standard_False;
123 return Standard_False;
126 // =======================================================================
127 // method : invalidateData
129 // =======================================================================
130 void OpenGl_BackgroundArray::invalidateData()
132 myToUpdate = Standard_True;
135 // =======================================================================
138 // =======================================================================
139 Standard_Boolean OpenGl_BackgroundArray::init (const Handle(OpenGl_Workspace)& theWorkspace) const
143 case Graphic3d_TOB_GRADIENT:
145 if (!createGradientArray())
147 return Standard_False;
151 case Graphic3d_TOB_TEXTURE:
153 if (!createTextureArray (theWorkspace))
155 return Standard_False;
159 case Graphic3d_TOB_NONE:
162 return Standard_False;
167 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
170 clearMemoryGL (aCtx);
172 buildVBO (aCtx, Standard_True);
173 myIsVboInit = Standard_True;
175 // Data is up-to-date
176 myToUpdate = Standard_False;
177 return Standard_True;
180 // =======================================================================
181 // method : createGradientArray
183 // =======================================================================
184 Standard_Boolean OpenGl_BackgroundArray::createGradientArray() const
186 // Initialize data for primitive array
187 Graphic3d_Attribute aGragientAttribInfo[] =
189 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
190 { Graphic3d_TOA_COLOR, Graphic3d_TOD_VEC3 }
193 if (!myAttribs->Init (4, aGragientAttribInfo, 2))
195 return Standard_False;
198 OpenGl_Vec2 aVertices[4] =
200 OpenGl_Vec2(float(myViewWidth), 0.0f),
201 OpenGl_Vec2(float(myViewWidth), float(myViewHeight)),
202 OpenGl_Vec2(0.0f, 0.0f),
203 OpenGl_Vec2(0.0f, float(myViewHeight))
206 float* aCorners[4] = {};
207 float aDiagCorner1[3] = {};
208 float aDiagCorner2[3] = {};
210 switch (myGradientParams.type)
214 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
215 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
216 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
217 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
222 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
223 aCorners[1] = myGradientParams.color1.xyz().ChangeData();
224 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
225 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
228 case Aspect_GFM_DIAG1:
230 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
231 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
232 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[0][0] + aCorners[3][0]);
233 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[0][1] + aCorners[3][1]);
234 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[0][2] + aCorners[3][2]);
235 aCorners[1] = aDiagCorner1;
236 aCorners[2] = aDiagCorner2;
239 case Aspect_GFM_DIAG2:
241 aCorners[1] = myGradientParams.color1.xyz().ChangeData();
242 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
243 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[1][0] + aCorners[2][0]);
244 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[1][1] + aCorners[2][1]);
245 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[1][2] + aCorners[2][2]);
246 aCorners[0] = aDiagCorner1;
247 aCorners[3] = aDiagCorner2;
250 case Aspect_GFM_CORNER1:
252 aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
253 aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
254 aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
255 aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
257 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
258 aCorners[1] = myGradientParams.color1.xyz().ChangeData();
259 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
260 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
263 case Aspect_GFM_CORNER2:
265 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
266 aCorners[1] = myGradientParams.color1.xyz().ChangeData();
267 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
268 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
271 case Aspect_GFM_CORNER3:
273 aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
274 aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
275 aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
276 aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
278 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
279 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
280 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
281 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
284 case Aspect_GFM_CORNER4:
286 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
287 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
288 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
289 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
292 case Aspect_GFM_NONE:
298 for (Standard_Integer anIt = 0; anIt < 4; ++anIt)
300 OpenGl_Vec2* aVertData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (anIt));
301 *aVertData = aVertices[anIt];
303 OpenGl_Vec3* aColorData = reinterpret_cast<OpenGl_Vec3* >(myAttribs->changeValue (anIt) + myAttribs->AttributeOffset (1));
304 *aColorData = OpenGl_Vec3(aCorners[anIt][0], aCorners[anIt][1], aCorners[anIt][2]);
307 return Standard_True;
310 // =======================================================================
311 // method : createTextureArray
313 // =======================================================================
314 Standard_Boolean OpenGl_BackgroundArray::createTextureArray (const Handle(OpenGl_Workspace)& theWorkspace) const
316 Graphic3d_Attribute aTextureAttribInfo[] =
318 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
319 { Graphic3d_TOA_UV, Graphic3d_TOD_VEC2 }
322 if (!myAttribs->Init (4, aTextureAttribInfo, 2))
324 return Standard_False;
327 GLfloat aTexRangeX = 1.0f; // texture <s> coordinate
328 GLfloat aTexRangeY = 1.0f; // texture <t> coordinate
330 // Set up for stretching or tiling
331 GLfloat anOffsetX = 0.5f * (float )myViewWidth;
332 GLfloat anOffsetY = 0.5f * (float )myViewHeight;
334 // Setting this coefficient to -1.0f allows to tile textures relatively to the top-left corner of the view
335 // (value 1.0f corresponds to the initial behavior - tiling from the bottom-left corner)
336 GLfloat aCoef = -1.0f;
338 // Get texture parameters
339 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
340 const OpenGl_AspectFace* anAspectFace = theWorkspace->AspectFace();
341 GLfloat aTextureWidth = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeX();
342 GLfloat aTextureHeight = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeY();
344 if (myFillMethod == Aspect_FM_CENTERED)
346 anOffsetX = 0.5f * aTextureWidth;
347 anOffsetY = 0.5f * aTextureHeight;
349 else if (myFillMethod == Aspect_FM_TILED)
351 aTexRangeX = (GLfloat )myViewWidth / aTextureWidth;
352 aTexRangeY = (GLfloat )myViewHeight / aTextureHeight;
355 // NOTE: texture is mapped using GL_REPEAT wrapping mode so integer part
356 // is simply ignored, and negative multiplier is here for convenience only
357 // and does not result e.g. in texture mirroring
360 OpenGl_Vec2* aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (0));
361 aData[0] = OpenGl_Vec2 (anOffsetX, -aCoef * anOffsetY);
362 aData[1] = OpenGl_Vec2 (aTexRangeX, 0.0f);
364 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (1));
365 aData[0] = OpenGl_Vec2 (anOffsetX, aCoef * anOffsetY);
366 aData[1] = OpenGl_Vec2 (aTexRangeX, aCoef * aTexRangeY);
368 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (2));
369 aData[0] = OpenGl_Vec2 (-anOffsetX, -aCoef * anOffsetY);
370 aData[1] = OpenGl_Vec2 (0.0f, 0.0f);
372 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (3));
373 aData[0] = OpenGl_Vec2 (-anOffsetX, aCoef * anOffsetY);
374 aData[1] = OpenGl_Vec2 (0.0f, aCoef * aTexRangeY);
376 return Standard_True;
379 // =======================================================================
380 // method : createTextureArray
382 // =======================================================================
383 void OpenGl_BackgroundArray::Render (const Handle(OpenGl_Workspace)& theWorkspace) const
385 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
386 Standard_Integer aViewSizeX = aCtx->Viewport()[2];
387 Standard_Integer aViewSizeY = aCtx->Viewport()[3];
388 if (theWorkspace->View()->Camera()->Tile().IsValid())
390 aViewSizeX = theWorkspace->View()->Camera()->Tile().TotalSize.x();
391 aViewSizeY = theWorkspace->View()->Camera()->Tile().TotalSize.y();
394 || myViewWidth != aViewSizeX
395 || myViewHeight != aViewSizeY)
397 myViewWidth = aViewSizeX;
398 myViewHeight = aViewSizeY;
402 OpenGl_Mat4 aProjection = aCtx->ProjectionState.Current();
403 OpenGl_Mat4 aWorldView = aCtx->WorldViewState.Current();
404 myTrsfPers.Apply (theWorkspace->View()->Camera(), aProjection, aWorldView,
405 aCtx->Viewport()[2], aCtx->Viewport()[3]);
407 aCtx->ProjectionState.Push();
408 aCtx->WorldViewState.Push();
409 aCtx->ProjectionState.SetCurrent (aProjection);
410 aCtx->WorldViewState.SetCurrent (aWorldView);
411 aCtx->ApplyProjectionMatrix();
412 aCtx->ApplyModelViewMatrix();
414 OpenGl_PrimitiveArray::Render (theWorkspace);
416 aCtx->ProjectionState.Pop();
417 aCtx->WorldViewState.Pop();
418 aCtx->ApplyProjectionMatrix();