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comparison: src/glCompiler.cc

src/glCompiler.cc

changeset 952
f116b63c4844
parent 950
5df69eb50182
child 953
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950:5df69eb50182 952:f116b63c4844
1 /*
2 * LDForge: LDraw parts authoring CAD
3 * Copyright (C) 2013, 2014 Teemu Piippo
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #define GL_GLEXT_PROTOTYPES
20 #include <GL/glu.h>
21 #include <GL/glext.h>
22 #include "glCompiler.h"
23 #include "ldObject.h"
24 #include "colors.h"
25 #include "ldDocument.h"
26 #include "miscallenous.h"
27 #include "glRenderer.h"
28 #include "dialogs.h"
29
30 struct GLErrorInfo
31 {
32 GLenum value;
33 QString text;
34 };
35
36 static const GLErrorInfo g_GLErrors[] =
37 {
38 { GL_NO_ERROR, "No error" },
39 { GL_INVALID_ENUM, "Unacceptable enumerator passed" },
40 { GL_INVALID_VALUE, "Numeric argument out of range" },
41 { GL_INVALID_OPERATION, "The operation is not allowed to be done in this state" },
42 { GL_INVALID_FRAMEBUFFER_OPERATION, "Framebuffer object is not complete"},
43 { GL_OUT_OF_MEMORY, "Out of memory" },
44 { GL_STACK_UNDERFLOW, "The operation would have caused an underflow" },
45 { GL_STACK_OVERFLOW, "The operation would have caused an overflow" },
46 };
47
48 CFGENTRY (String, SelectColorBlend, "#0080FF")
49 EXTERN_CFGENTRY (Bool, BlackEdges)
50 EXTERN_CFGENTRY (String, BackgroundColor)
51
52 static QList<int> g_warnedColors;
53 static const QColor g_BFCFrontColor (64, 192, 80);
54 static const QColor g_BFCBackColor (208, 64, 64);
55
56 // static QMap<LDObject*, String> g_objectOrigins;
57
58 // =============================================================================
59 //
60 void CheckGLErrorImpl (const char* file, int line)
61 {
62 QString errmsg;
63 GLenum errnum = glGetError();
64
65 if (errnum == GL_NO_ERROR)
66 return;
67
68 for (const GLErrorInfo& err : g_GLErrors)
69 {
70 if (err.value == errnum)
71 {
72 errmsg = err.text;
73 break;
74 }
75 }
76
77 print ("OpenGL ERROR: at %1:%2: %3", Basename (QString (file)), line, errmsg);
78 }
79
80 // =============================================================================
81 //
82 GLCompiler::GLCompiler (GLRenderer* renderer) :
83 m_renderer (renderer)
84 {
85 needMerge();
86 memset (m_vboSizes, 0, sizeof m_vboSizes);
87 }
88
89 // =============================================================================
90 //
91 void GLCompiler::initialize()
92 {
93 initializeOpenGLFunctions();
94 glGenBuffers (g_numVBOs, &m_vbo[0]);
95 CHECK_GL_ERROR();
96 }
97
98 // =============================================================================
99 //
100 GLCompiler::~GLCompiler()
101 {
102 glDeleteBuffers (g_numVBOs, &m_vbo[0]);
103 CHECK_GL_ERROR();
104
105 if (m_renderer != null)
106 m_renderer->setCompiler (null);
107 }
108
109 // =============================================================================
110 //
111 uint32 GLCompiler::colorToRGB (const QColor& color)
112 {
113 return
114 (color.red() & 0xFF) << 0x00 |
115 (color.green() & 0xFF) << 0x08 |
116 (color.blue() & 0xFF) << 0x10 |
117 (color.alpha() & 0xFF) << 0x18;
118 }
119
120 // =============================================================================
121 //
122 QColor GLCompiler::indexColorForID (int id) const
123 {
124 // Calculate a color based from this index. This method caters for
125 // 16777216 objects. I don't think that will be exceeded anytime soon. :)
126 int r = (id / 0x10000) % 0x100,
127 g = (id / 0x100) % 0x100,
128 b = id % 0x100;
129
130 return QColor (r, g, b);
131 }
132
133 // =============================================================================
134 //
135 QColor GLCompiler::getColorForPolygon (LDPolygon& poly, LDObject* topobj,
136 EVBOComplement complement) const
137 {
138 QColor qcol;
139
140 switch (complement)
141 {
142 case VBOCM_Surfaces:
143 case VBOCM_NumComplements:
144 return QColor();
145
146 case VBOCM_BFCFrontColors:
147 qcol = g_BFCFrontColor;
148 break;
149
150 case VBOCM_BFCBackColors:
151 qcol = g_BFCBackColor;
152 break;
153
154 case VBOCM_PickColors:
155 return indexColorForID (topobj->id());
156
157 case VBOCM_RandomColors:
158 qcol = topobj->randomColor();
159 break;
160
161 case VBOCM_NormalColors:
162 if (poly.color == MainColor)
163 {
164 if (topobj->color() == MainColor)
165 qcol = GLRenderer::getMainColor();
166 else
167 qcol = topobj->color().faceColor();
168 }
169 else if (poly.color == EdgeColor)
170 {
171 qcol = Luma (QColor (cfg::BackgroundColor)) > 40 ? Qt::black : Qt::white;
172 }
173 else
174 {
175 LDColor col = poly.color;
176
177 if (col.isValid())
178 qcol = col.faceColor();
179 }
180 break;
181 }
182
183 if (not qcol.isValid())
184 {
185 // The color was unknown. Use main color to make the polygon at least
186 // not appear pitch-black.
187 if (poly.num != 2 and poly.num != 5)
188 qcol = GLRenderer::getMainColor();
189 else
190 qcol = Qt::black;
191
192 // Warn about the unknown color, but only once.
193 if (not g_warnedColors.contains (poly.color))
194 {
195 print ("Unknown color %1!\n", poly.color);
196 g_warnedColors << poly.color;
197 }
198
199 return qcol;
200 }
201
202 double blendAlpha = 0.0;
203
204 if (topobj->isSelected())
205 blendAlpha = 1.0;
206 else if (topobj == m_renderer->objectAtCursor())
207 blendAlpha = 0.5;
208
209 if (blendAlpha != 0.0)
210 {
211 QColor selcolor (cfg::SelectColorBlend);
212 double denom = blendAlpha + 1.0;
213 qcol.setRed ((qcol.red() + (selcolor.red() * blendAlpha)) / denom);
214 qcol.setGreen ((qcol.green() + (selcolor.green() * blendAlpha)) / denom);
215 qcol.setBlue ((qcol.blue() + (selcolor.blue() * blendAlpha)) / denom);
216 }
217
218 return qcol;
219 }
220
221 // =============================================================================
222 //
223 void GLCompiler::needMerge()
224 {
225 for (int i = 0; i < countof (m_vboChanged); ++i)
226 m_vboChanged[i] = true;
227 }
228
229 // =============================================================================
230 //
231 void GLCompiler::stageForCompilation (LDObject* obj)
232 {
233 /*
234 g_objectOrigins[obj] = format ("%1:%2 (%3)",
235 obj->document()->getDisplayName(), obj->lineNumber(), obj->typeName());
236 */
237
238 m_staged << obj;
239 }
240
241 // =============================================================================
242 //
243 void GLCompiler::unstage (LDObject* obj)
244 {
245 m_staged.removeOne (obj);
246 }
247
248 // =============================================================================
249 //
250 void GLCompiler::compileDocument (LDDocument* doc)
251 {
252 if (doc != null)
253 {
254 for (LDObject* obj : doc->objects())
255 compileObject (obj);
256 }
257 }
258
259 // =============================================================================
260 //
261 void GLCompiler::compileStaged()
262 {
263 RemoveDuplicates (m_staged);
264
265 for (auto it = m_staged.begin(); it != m_staged.end(); ++it)
266 {
267 if (*it == null)
268 continue;
269
270 compileObject (*it);
271 }
272
273 m_staged.clear();
274 }
275
276 // =============================================================================
277 //
278 void GLCompiler::prepareVBO (int vbonum)
279 {
280 // Compile anything that still awaits it
281 compileStaged();
282
283 if (not m_vboChanged[vbonum])
284 return;
285
286 QVector<GLfloat> vbodata;
287
288 for (auto it = m_objectInfo.begin(); it != m_objectInfo.end();)
289 {
290 if (it.key() == null)
291 {
292 it = m_objectInfo.erase (it);
293 continue;
294 }
295
296 if (it.key()->document() == CurrentDocument()
297 and not it.key()->isHidden())
298 {
299 vbodata += it->data[vbonum];
300 }
301
302 ++it;
303 }
304
305 glBindBuffer (GL_ARRAY_BUFFER, m_vbo[vbonum]);
306 glBufferData (GL_ARRAY_BUFFER, vbodata.size() * sizeof(GLfloat), vbodata.constData(), GL_STATIC_DRAW);
307 glBindBuffer (GL_ARRAY_BUFFER, 0);
308 CHECK_GL_ERROR();
309 m_vboChanged[vbonum] = false;
310 m_vboSizes[vbonum] = vbodata.size();
311 }
312
313 // =============================================================================
314 //
315 void GLCompiler::dropObject (LDObject* obj)
316 {
317 auto it = m_objectInfo.find (obj);
318
319 if (it != m_objectInfo.end())
320 {
321 m_objectInfo.erase (it);
322 needMerge();
323 }
324
325 unstage (obj);
326 }
327
328 // =============================================================================
329 //
330 void GLCompiler::compileObject (LDObject* obj)
331 {
332 // print ("Compile %1\n", g_objectOrigins[obj]);
333
334 if (obj == null or obj->document() == null or obj->document()->isImplicit())
335 return;
336
337 ObjectVBOInfo info;
338 info.isChanged = true;
339 dropObject (obj);
340
341 switch (obj->type())
342 {
343 // Note: We cannot split quads into triangles here, it would mess up the
344 // wireframe view. Quads must go into separate vbos.
345 case OBJ_Triangle:
346 case OBJ_Quad:
347 case OBJ_Line:
348 case OBJ_CondLine:
349 {
350 LDPolygon* poly = obj->getPolygon();
351 poly->id = obj->id();
352 compilePolygon (*poly, obj, &info);
353 delete poly;
354 break;
355 }
356
357 case OBJ_Subfile:
358 {
359 LDSubfile* ref = static_cast<LDSubfile*> (obj);
360 auto data = ref->inlinePolygons();
361
362 for (LDPolygon& poly : data)
363 {
364 poly.id = obj->id();
365 compilePolygon (poly, obj, &info);
366 }
367 break;
368 }
369
370 default:
371 break;
372 }
373
374 m_objectInfo[obj] = info;
375 needMerge();
376 }
377
378 // =============================================================================
379 //
380 void GLCompiler::compilePolygon (LDPolygon& poly, LDObject* topobj, ObjectVBOInfo* objinfo)
381 {
382 EVBOSurface surface;
383 int numverts;
384
385 switch (poly.num)
386 {
387 case 2: surface = VBOSF_Lines; numverts = 2; break;
388 case 3: surface = VBOSF_Triangles; numverts = 3; break;
389 case 4: surface = VBOSF_Quads; numverts = 4; break;
390 case 5: surface = VBOSF_CondLines; numverts = 2; break;
391 default: return;
392 }
393
394 for (EVBOComplement complement = VBOCM_First; complement < VBOCM_NumComplements; ++complement)
395 {
396 const int vbonum = vboNumber (surface, complement);
397 QVector<GLfloat>& vbodata = objinfo->data[vbonum];
398 const QColor color = getColorForPolygon (poly, topobj, complement);
399
400 for (int vert = 0; vert < numverts; ++vert)
401 {
402 if (complement == VBOCM_Surfaces)
403 {
404 // Write coordinates. Apparently Z must be flipped too?
405 vbodata << poly.vertices[vert].x()
406 << -poly.vertices[vert].y()
407 << -poly.vertices[vert].z();
408 }
409 else
410 {
411 vbodata << ((GLfloat) color.red()) / 255.0f
412 << ((GLfloat) color.green()) / 255.0f
413 << ((GLfloat) color.blue()) / 255.0f
414 << ((GLfloat) color.alpha()) / 255.0f;
415 }
416 }
417 }
418 }
419
420 void GLCompiler::setRenderer (GLRenderer* renderer)
421 {
422 m_renderer = renderer;
423 }

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