0025800: Visualization, TKOpenGl - disable GL_DITHER explicitly
[occt.git] / src / OpenGl / OpenGl_BackgroundArray.cxx
CommitLineData
0b0320e7 1// Created on: 2015-01-16
2// Created by: Anastasia BORISOVA
3// Copyright (c) 2015 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 <OpenGl_BackgroundArray.hxx>
17
18#include <Aspect_FillMethod.hxx>
19#include <NCollection_AlignedAllocator.hxx>
20#include <OpenGl_Texture.hxx>
21
22// =======================================================================
23// method : Constructor
24// purpose :
25// =======================================================================
26OpenGl_BackgroundArray::OpenGl_BackgroundArray (const Graphic3d_TypeOfBackground theType)
27: OpenGl_PrimitiveArray (NULL, Graphic3d_TOPA_TRIANGLESTRIPS, NULL, NULL, NULL),
28 myToUpdate (Standard_False),
29 myType (theType),
30 myViewWidth (0),
31 myViewHeight (0),
32 myFillMethod (Aspect_FM_NONE)
33{
34 Handle(NCollection_AlignedAllocator) anAlloc = new NCollection_AlignedAllocator (16);
35 myAttribs = new Graphic3d_Buffer (anAlloc);
36
37 myDrawMode = Graphic3d_TOPA_TRIANGLESTRIPS;
38
39 myGradientParams.color1 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
40 myGradientParams.color2 = OpenGl_Vec4 (0.0f, 0.0f, 0.0f, 1.0f);
41 myGradientParams.type = Aspect_GFM_NONE;
42}
43
44// =======================================================================
45// method : SetTextureParameters
46// purpose :
47// =======================================================================
48void OpenGl_BackgroundArray::SetTextureParameters (const Aspect_FillMethod theFillMethod)
49{
50 if (myType != Graphic3d_TOB_TEXTURE)
51 {
52 return;
53 }
54
55 myFillMethod = theFillMethod;
56 invalidateData();
57}
58
59// =======================================================================
60// method : SetTextureFillMethod
61// purpose :
62// =======================================================================
63void OpenGl_BackgroundArray::SetTextureFillMethod (const Aspect_FillMethod theFillMethod)
64{
65 myFillMethod = theFillMethod;
66 invalidateData();
67}
68
69// =======================================================================
70// method : SetGradientParameters
71// purpose :
72// =======================================================================
73void OpenGl_BackgroundArray::SetGradientParameters (const Quantity_Color& theColor1,
74 const Quantity_Color& theColor2,
75 const Aspect_GradientFillMethod theType)
76{
77 if (myType != Graphic3d_TOB_GRADIENT)
78 {
79 return;
80 }
81
82 Standard_Real anR, aG, aB;
83 theColor1.Values (anR, aG, aB, Quantity_TOC_RGB);
84 myGradientParams.color1 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
85
86 theColor2.Values (anR, aG, aB, Quantity_TOC_RGB);
87 myGradientParams.color2 = OpenGl_Vec4 ((float)anR, (float)aG, (float)aB, 0.0f);
88
89 myGradientParams.type = theType;
90 invalidateData();
91}
92
93// =======================================================================
94// method : SetGradientFillMethod
95// purpose :
96// =======================================================================
97void OpenGl_BackgroundArray::SetGradientFillMethod (const Aspect_GradientFillMethod theType)
98{
99 if (myType != Graphic3d_TOB_GRADIENT)
100 {
101 return;
102 }
103
104 myGradientParams.type = theType;
105 invalidateData();
106}
107
108// =======================================================================
109// method : IsDefined
110// purpose :
111// =======================================================================
112bool OpenGl_BackgroundArray::IsDefined() const
113{
114 switch (myType)
115 {
116 case Graphic3d_TOB_GRADIENT: return myGradientParams.type != Aspect_GFM_NONE;
117 case Graphic3d_TOB_TEXTURE: return myFillMethod != Aspect_FM_NONE;
118 case Graphic3d_TOB_NONE: return Standard_False;
119 }
120 return Standard_False;
121}
122
123// =======================================================================
124// method : invalidateData
125// purpose :
126// =======================================================================
127void OpenGl_BackgroundArray::invalidateData()
128{
129 myToUpdate = Standard_True;
130}
131
132// =======================================================================
133// method : Init
134// purpose :
135// =======================================================================
136Standard_Boolean OpenGl_BackgroundArray::Init (const Handle(OpenGl_Workspace)& theWorkspace)
137{
138 switch (myType)
139 {
140 case Graphic3d_TOB_GRADIENT:
141 {
142 if (!createGradientArray())
143 {
144 return Standard_False;
145 }
146 break;
147 }
148 case Graphic3d_TOB_TEXTURE:
149 {
150 myViewWidth = theWorkspace->Width();
151 myViewHeight = theWorkspace->Height();
152 if (!createTextureArray (theWorkspace))
153 {
154 return Standard_False;
155 }
156 break;
157 }
158 case Graphic3d_TOB_NONE:
159 default:
160 {
161 return Standard_False;
162 }
163 }
164
165 // Init VBO
166 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
167 if (myIsVboInit)
168 {
169 clearMemoryGL (aCtx);
170 }
171 buildVBO (aCtx, Standard_True);
172 myIsVboInit = Standard_True;
173
174 // Data is up-to-date
175 myToUpdate = Standard_False;
176 return Standard_True;
177}
178
179// =======================================================================
180// method : createGradientArray
181// purpose :
182// =======================================================================
183Standard_Boolean OpenGl_BackgroundArray::createGradientArray()
184{
185 // Initialize data for primitive array
186 Graphic3d_Attribute aGragientAttribInfo[] =
187 {
188 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
189 { Graphic3d_TOA_COLOR, Graphic3d_TOD_VEC3 }
190 };
191
192 if (!myAttribs->Init (4, aGragientAttribInfo, 2))
193 {
194 return Standard_False;
195 }
196
197 OpenGl_Vec2 aVertices[4] =
198 {
199 OpenGl_Vec2(-1.0f, -1.0f),
200 OpenGl_Vec2( 1.0f, -1.0f),
201 OpenGl_Vec2( 1.0f, 1.0f),
202 OpenGl_Vec2(-1.0f, 1.0f)
203 };
204
205 Tfloat* aCorners[4] = {};
206 Tfloat aDiagCorner1[3] = {};
207 Tfloat aDiagCorner2[3] = {};
208
209 switch (myGradientParams.type)
210 {
211 case Aspect_GFM_HOR:
212 {
213 aCorners[0] = myGradientParams.color1.xyz().ChangeData();
214 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
215 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
216 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
217 break;
218 }
219 case Aspect_GFM_VER:
220 {
221 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
222 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
223 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
224 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
225 break;
226 }
227 case Aspect_GFM_DIAG1:
228 {
229 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
230 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
231 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[1][0] + aCorners[3][0]);
232 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[1][1] + aCorners[3][1]);
233 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[1][2] + aCorners[3][2]);
234 aCorners[0] = aDiagCorner1;
235 aCorners[2] = aDiagCorner2;
236 break;
237 }
238 case Aspect_GFM_DIAG2:
239 {
240 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
241 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
242 aDiagCorner1[0] = aDiagCorner2[0] = 0.5f * (aCorners[0][0] + aCorners[2][0]);
243 aDiagCorner1[1] = aDiagCorner2[1] = 0.5f * (aCorners[0][1] + aCorners[2][1]);
244 aDiagCorner1[2] = aDiagCorner2[2] = 0.5f * (aCorners[0][2] + aCorners[2][2]);
245 aCorners[1] = aDiagCorner1;
246 aCorners[3] = aDiagCorner2;
247 break;
248 }
249 case Aspect_GFM_CORNER1:
250 {
251 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
252 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
253 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
254 aCorners[3] = myGradientParams.color1.xyz().ChangeData();
255 break;
256 }
257 case Aspect_GFM_CORNER2:
258 {
259 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
260 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
261 aCorners[2] = myGradientParams.color1.xyz().ChangeData();
262 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
263 break;
264 }
265 case Aspect_GFM_CORNER3:
266 {
267 aCorners[0] = myGradientParams.color2.xyz().ChangeData();
268 aCorners[1] = myGradientParams.color1.xyz().ChangeData();
269 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
270 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
271 break;
272 }
273 case Aspect_GFM_CORNER4:
274 {
275 aCorners[0] = myGradientParams.color1.xyz().ChangeData();
276 aCorners[1] = myGradientParams.color2.xyz().ChangeData();
277 aCorners[2] = myGradientParams.color2.xyz().ChangeData();
278 aCorners[3] = myGradientParams.color2.xyz().ChangeData();
279 break;
280 }
281 case Aspect_GFM_NONE:
282 {
283 break;
284 }
285 }
286
287 if (myGradientParams.type != Aspect_GFM_CORNER1
288 && myGradientParams.type != Aspect_GFM_CORNER3)
289 {
290 for (Standard_Integer anIt = 0; anIt < 4; ++anIt)
291 {
292 OpenGl_Vec2* aVertData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (anIt));
293 *aVertData = aVertices[anIt];
294
295 OpenGl_Vec3* aColorData = reinterpret_cast<OpenGl_Vec3* >(myAttribs->changeValue (anIt) + myAttribs->AttributeOffset (1));
296 *aColorData = OpenGl_Vec3(aCorners[anIt][0], aCorners[anIt][1], aCorners[anIt][2]);
297 }
298 }
299 else //if (myGradientParams.type == Aspect_GFM_CORNER1 || myGradientParams.type == Aspect_GFM_CORNER3)
300 {
301 for (Standard_Integer anIt = 0; anIt < 4; ++anIt)
302 {
303 // Indices should be in sequence 1, 2, 3, 0
304 Standard_Integer anIndex = (anIt + 1) % 4;
305 OpenGl_Vec2* aVertData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (anIt));
306 *aVertData = aVertices[anIndex];
307
308 OpenGl_Vec3* aColorData = reinterpret_cast<OpenGl_Vec3* >(myAttribs->changeValue (anIt) + myAttribs->AttributeOffset (1));
309 *aColorData = OpenGl_Vec3(aCorners[anIndex][0], aCorners[anIndex][1], aCorners[anIndex][2]);
310 }
311 }
312
313 return Standard_True;
314}
315
316// =======================================================================
317// method : createTextureArray
318// purpose :
319// =======================================================================
320Standard_Boolean OpenGl_BackgroundArray::createTextureArray (const Handle(OpenGl_Workspace)& theWorkspace)
321{
322 Graphic3d_Attribute aTextureAttribInfo[] =
323 {
324 { Graphic3d_TOA_POS, Graphic3d_TOD_VEC2 },
325 { Graphic3d_TOA_UV, Graphic3d_TOD_VEC2 }
326 };
327
328 if (!myAttribs->Init (4, aTextureAttribInfo, 2))
329 {
330 return Standard_False;
331 }
332
333 GLfloat aTexRangeX = 1.0f; // texture <s> coordinate
334 GLfloat aTexRangeY = 1.0f; // texture <t> coordinate
335
336 // Set up for stretching or tiling
337 GLfloat anOffsetX = 1.0f;
338 GLfloat anOffsetY = 1.0f;
339
340 // Setting this coefficient to -1.0f allows to tile textures relatively to the top-left corner of the view
341 // (value 1.0f corresponds to the initial behavior - tiling from the bottom-left corner)
342 GLfloat aCoef = -1.0f;
343
344 // Get texture parameters
345 const Handle(OpenGl_Context)& aCtx = theWorkspace->GetGlContext();
346 const OpenGl_AspectFace* anAspectFace = theWorkspace->AspectFace (Standard_False);
347 GLfloat aTextureWidth = (GLfloat )anAspectFace->TextureRes (aCtx)->SizeX();
348 GLfloat aTextureHeight = (GLfloat )anAspectFace->TextureRes (aCtx)->SizeY();
349
350 if (myFillMethod == Aspect_FM_CENTERED)
351 {
352 anOffsetX = aTextureWidth / (GLfloat )myViewWidth;
353 anOffsetY = aTextureHeight / (GLfloat )myViewHeight;
354 }
355 else if (myFillMethod == Aspect_FM_TILED)
356 {
357 aTexRangeX = (GLfloat )myViewWidth / aTextureWidth;
358 aTexRangeY = (GLfloat )myViewHeight / aTextureHeight;
359 }
360
361 // NOTE: texture is mapped using GL_REPEAT wrapping mode so integer part
362 // is simply ignored, and negative multiplier is here for convenience only
363 // and does not result e.g. in texture mirroring
364
365 OpenGl_Vec2* aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (0));
366 aData[0] = OpenGl_Vec2 (-anOffsetX, -aCoef * anOffsetY);
367 aData[1] = OpenGl_Vec2 (0.0f, 0.0f);
368
369 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (1));
370 aData[0] = OpenGl_Vec2 (anOffsetX, -aCoef * anOffsetY);
371 aData[1] = OpenGl_Vec2 (aTexRangeX, 0.0f);
372
373 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (2));
374 aData[0] = OpenGl_Vec2 (anOffsetX, aCoef * anOffsetY);
375 aData[1] = OpenGl_Vec2 (aTexRangeX, aCoef * aTexRangeY);
376
377 aData = reinterpret_cast<OpenGl_Vec2* >(myAttribs->changeValue (3));
378 aData[0] = OpenGl_Vec2 (-anOffsetX, aCoef * anOffsetY);
379 aData[1] = OpenGl_Vec2 (0.0f, aCoef * aTexRangeY);
380
381 return Standard_True;
382}