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;
43 myGradientParams.color1 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
44 myGradientParams.color2 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
45 myGradientParams.type = Aspect_GFM_NONE;
48 // =======================================================================
49 // method : SetTextureParameters
51 // =======================================================================
52 void OpenGl_BackgroundArray::SetTextureParameters (const Aspect_FillMethod theFillMethod)
54 if (myType != Graphic3d_TOB_TEXTURE)
59 myFillMethod = theFillMethod;
63 // =======================================================================
64 // method : SetTextureFillMethod
66 // =======================================================================
67 void OpenGl_BackgroundArray::SetTextureFillMethod (const Aspect_FillMethod theFillMethod)
69 myFillMethod = theFillMethod;
73 // =======================================================================
74 // method : SetGradientParameters
76 // =======================================================================
77 void OpenGl_BackgroundArray::SetGradientParameters (const Quantity_Color& theColor1,
78 const Quantity_Color& theColor2,
79 const Aspect_GradientFillMethod theType)
81 if (myType != Graphic3d_TOB_GRADIENT)
86 Standard_Real anR, aG, aB;
87 theColor1.Values (anR, aG, aB, Quantity_TOC_RGB);
88 myGradientParams.color1 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
90 theColor2.Values (anR, aG, aB, Quantity_TOC_RGB);
91 myGradientParams.color2 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
93 myGradientParams.type = theType;
97 // =======================================================================
98 // method : SetGradientFillMethod
100 // =======================================================================
101 void OpenGl_BackgroundArray::SetGradientFillMethod (const Aspect_GradientFillMethod theType)
103 if (myType != Graphic3d_TOB_GRADIENT)
108 myGradientParams.type = theType;
112 // =======================================================================
113 // method : IsDefined
115 // =======================================================================
116 bool OpenGl_BackgroundArray::IsDefined() const
120 case Graphic3d_TOB_GRADIENT: return myGradientParams.type != Aspect_GFM_NONE;
121 case Graphic3d_TOB_TEXTURE: return myFillMethod != Aspect_FM_NONE;
122 case Graphic3d_TOB_NONE: return Standard_False;
124 return Standard_False;
127 // =======================================================================
128 // method : invalidateData
130 // =======================================================================
131 void OpenGl_BackgroundArray::invalidateData()
133 myToUpdate = Standard_True;
136 // =======================================================================
139 // =======================================================================
140 Standard_Boolean OpenGl_BackgroundArray::init (const Handle(OpenGl_Workspace)& theWorkspace) const
144 case Graphic3d_TOB_GRADIENT:
146 if (!createGradientArray())
148 return Standard_False;
152 case Graphic3d_TOB_TEXTURE:
154 if (!createTextureArray (theWorkspace))
156 return Standard_False;
160 case Graphic3d_TOB_NONE:
163 return Standard_False;
168 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
171 clearMemoryGL (aCtx);
173 buildVBO (aCtx, Standard_True);
174 myIsVboInit = Standard_True;
176 // Data is up-to-date
177 myToUpdate = Standard_False;
178 return Standard_True;
181 // =======================================================================
182 // method : createGradientArray
184 // =======================================================================
185 Standard_Boolean OpenGl_BackgroundArray::createGradientArray() const
187 // Initialize data for primitive array
188 Graphic3d_Attribute aGragientAttribInfo[] =
190 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
191 { Graphic3d_TOA_COLOR, Graphic3d_TOD_VEC3 }
194 if (!myAttribs->Init (4, aGragientAttribInfo, 2))
196 return Standard_False;
199 OpenGl_Vec2 aVertices[4] =
201 OpenGl_Vec2(float(myViewWidth), 0.0f),
202 OpenGl_Vec2(float(myViewWidth), float(myViewHeight)),
203 OpenGl_Vec2(0.0f, 0.0f),
204 OpenGl_Vec2(0.0f, float(myViewHeight))
207 float* aCorners[4] = {};
208 float aDiagCorner1[3] = {};
209 float aDiagCorner2[3] = {};
211 switch (myGradientParams.type)
215 aCorners[0] = myGradientParams.color2.ChangeData();
216 aCorners[1] = myGradientParams.color2.ChangeData();
217 aCorners[2] = myGradientParams.color1.ChangeData();
218 aCorners[3] = myGradientParams.color1.ChangeData();
223 aCorners[0] = myGradientParams.color2.ChangeData();
224 aCorners[1] = myGradientParams.color1.ChangeData();
225 aCorners[2] = myGradientParams.color2.ChangeData();
226 aCorners[3] = myGradientParams.color1.ChangeData();
229 case Aspect_GFM_DIAG1:
231 aCorners[0] = myGradientParams.color2.ChangeData();
232 aCorners[3] = myGradientParams.color1.ChangeData();
233 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[0][0] + aCorners[3][0]);
234 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[0][1] + aCorners[3][1]);
235 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[0][2] + aCorners[3][2]);
236 aCorners[1] = aDiagCorner1;
237 aCorners[2] = aDiagCorner2;
240 case Aspect_GFM_DIAG2:
242 aCorners[1] = myGradientParams.color1.ChangeData();
243 aCorners[2] = myGradientParams.color2.ChangeData();
244 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[1][0] + aCorners[2][0]);
245 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[1][1] + aCorners[2][1]);
246 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[1][2] + aCorners[2][2]);
247 aCorners[0] = aDiagCorner1;
248 aCorners[3] = aDiagCorner2;
251 case Aspect_GFM_CORNER1:
253 aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
254 aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
255 aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
256 aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
258 aCorners[0] = myGradientParams.color2.ChangeData();
259 aCorners[1] = myGradientParams.color1.ChangeData();
260 aCorners[2] = myGradientParams.color2.ChangeData();
261 aCorners[3] = myGradientParams.color2.ChangeData();
264 case Aspect_GFM_CORNER2:
266 aCorners[0] = myGradientParams.color2.ChangeData();
267 aCorners[1] = myGradientParams.color1.ChangeData();
268 aCorners[2] = myGradientParams.color2.ChangeData();
269 aCorners[3] = myGradientParams.color2.ChangeData();
272 case Aspect_GFM_CORNER3:
274 aVertices[0] = OpenGl_Vec2(float(myViewWidth), float(myViewHeight));
275 aVertices[1] = OpenGl_Vec2(0.0f, float(myViewHeight));
276 aVertices[2] = OpenGl_Vec2(float(myViewWidth), 0.0f);
277 aVertices[3] = OpenGl_Vec2(0.0f, 0.0f);
279 aCorners[0] = myGradientParams.color2.ChangeData();
280 aCorners[1] = myGradientParams.color2.ChangeData();
281 aCorners[2] = myGradientParams.color1.ChangeData();
282 aCorners[3] = myGradientParams.color2.ChangeData();
285 case Aspect_GFM_CORNER4:
287 aCorners[0] = myGradientParams.color2.ChangeData();
288 aCorners[1] = myGradientParams.color2.ChangeData();
289 aCorners[2] = myGradientParams.color1.ChangeData();
290 aCorners[3] = myGradientParams.color2.ChangeData();
293 case Aspect_GFM_NONE:
299 for (Standard_Integer anIt = 0; anIt < 4; ++anIt)
301 OpenGl_Vec2* aVertData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (anIt));
302 *aVertData = aVertices[anIt];
304 OpenGl_Vec3* aColorData = reinterpret_cast<OpenGl_Vec3* >(myAttribs->changeValue (anIt) + myAttribs->AttributeOffset (1));
305 *aColorData = OpenGl_Vec3(aCorners[anIt][0], aCorners[anIt][1], aCorners[anIt][2]);
308 return Standard_True;
311 // =======================================================================
312 // method : createTextureArray
314 // =======================================================================
315 Standard_Boolean OpenGl_BackgroundArray::createTextureArray (const Handle(OpenGl_Workspace)& theWorkspace) const
317 Graphic3d_Attribute aTextureAttribInfo[] =
319 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
320 { Graphic3d_TOA_UV, Graphic3d_TOD_VEC2 }
323 if (!myAttribs->Init (4, aTextureAttribInfo, 2))
325 return Standard_False;
328 GLfloat aTexRangeX = 1.0f; // texture <s> coordinate
329 GLfloat aTexRangeY = 1.0f; // texture <t> coordinate
331 // Set up for stretching or tiling
332 GLfloat anOffsetX = 0.5f * (float )myViewWidth;
333 GLfloat anOffsetY = 0.5f * (float )myViewHeight;
335 // Setting this coefficient to -1.0f allows to tile textures relatively to the top-left corner of the view
336 // (value 1.0f corresponds to the initial behavior - tiling from the bottom-left corner)
337 GLfloat aCoef = -1.0f;
339 // Get texture parameters
340 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
341 const OpenGl_Aspects* anAspectFace = theWorkspace->Aspects();
342 GLfloat aTextureWidth = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeX();
343 GLfloat aTextureHeight = (GLfloat )anAspectFace->TextureSet (aCtx)->First()->SizeY();
345 if (myFillMethod == Aspect_FM_CENTERED)
347 anOffsetX = 0.5f * aTextureWidth;
348 anOffsetY = 0.5f * aTextureHeight;
350 else if (myFillMethod == Aspect_FM_TILED)
352 aTexRangeX = (GLfloat )myViewWidth / aTextureWidth;
353 aTexRangeY = (GLfloat )myViewHeight / aTextureHeight;
356 // NOTE: texture is mapped using GL_REPEAT wrapping mode so integer part
357 // is simply ignored, and negative multiplier is here for convenience only
358 // and does not result e.g. in texture mirroring
361 OpenGl_Vec2* aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (0));
362 aData[0] = OpenGl_Vec2 (anOffsetX, -aCoef * anOffsetY);
363 aData[1] = OpenGl_Vec2 (aTexRangeX, 0.0f);
365 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (1));
366 aData[0] = OpenGl_Vec2 (anOffsetX, aCoef * anOffsetY);
367 aData[1] = OpenGl_Vec2 (aTexRangeX, aCoef * aTexRangeY);
369 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (2));
370 aData[0] = OpenGl_Vec2 (-anOffsetX, -aCoef * anOffsetY);
371 aData[1] = OpenGl_Vec2 (0.0f, 0.0f);
373 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (3));
374 aData[0] = OpenGl_Vec2 (-anOffsetX, aCoef * anOffsetY);
375 aData[1] = OpenGl_Vec2 (0.0f, aCoef * aTexRangeY);
377 return Standard_True;
380 // =======================================================================
381 // method : createTextureArray
383 // =======================================================================
384 void OpenGl_BackgroundArray::Render (const Handle(OpenGl_Workspace)& theWorkspace) const
386 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
387 Standard_Integer aViewSizeX = aCtx->Viewport()[2];
388 Standard_Integer aViewSizeY = aCtx->Viewport()[3];
389 if (theWorkspace->View()->Camera()->Tile().IsValid())
391 aViewSizeX = theWorkspace->View()->Camera()->Tile().TotalSize.x();
392 aViewSizeY = theWorkspace->View()->Camera()->Tile().TotalSize.y();
395 || myViewWidth != aViewSizeX
396 || myViewHeight != aViewSizeY)
398 myViewWidth = aViewSizeX;
399 myViewHeight = aViewSizeY;
403 OpenGl_Mat4 aProjection = aCtx->ProjectionState.Current();
404 OpenGl_Mat4 aWorldView = aCtx->WorldViewState.Current();
405 myTrsfPers.Apply (theWorkspace->View()->Camera(), aProjection, aWorldView,
406 aCtx->Viewport()[2], aCtx->Viewport()[3]);
408 aCtx->ProjectionState.Push();
409 aCtx->WorldViewState.Push();
410 aCtx->ProjectionState.SetCurrent (aProjection);
411 aCtx->WorldViewState.SetCurrent (aWorldView);
412 aCtx->ApplyProjectionMatrix();
413 aCtx->ApplyModelViewMatrix();
415 OpenGl_PrimitiveArray::Render (theWorkspace);
417 aCtx->ProjectionState.Pop();
418 aCtx->WorldViewState.Pop();
419 aCtx->ApplyProjectionMatrix();