1 /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 Robert Osfield
2  *
3  * This library is open source and may be redistributed and/or modified under
4  * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5  * (at your option) any later version.  The full license is in LICENSE file
6  * included with this distribution, and on the openscenegraph.org website.
7  *
8  * This library is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * OpenSceneGraph Public License for more details.
12 */
13 
14 #include <osgUI/Style>
15 #include <osg/io_utils>
16 #include <osg/Geode>
17 #include <osg/ShapeDrawable>
18 #include <osg/Depth>
19 #include <osg/TexGen>
20 #include <osg/AlphaFunc>
21 #include <osg/MatrixTransform>
22 #include <osg/ComputeBoundsVisitor>
23 #include <osgUtil/Optimizer>
24 #include <osgText/Text>
25 #include <osgDB/ReadFile>
26 
27 using namespace osgUI;
28 
instance()29 osg::ref_ptr<Style>& Style::instance()
30 {
31     static osg::ref_ptr<Style> s_style = new Style;
32     return s_style;
33 }
34 
OSG_INIT_SINGLETON_PROXY(StyleSingletonProxy,Style::instance ())35 OSG_INIT_SINGLETON_PROXY(StyleSingletonProxy, Style::instance())
36 
37 Style::Style()
38 {
39     osg::ref_ptr<osg::Image> image = new osg::Image;
40     image->allocateImage(1,1,1,GL_RGBA, GL_FLOAT);
41     *(reinterpret_cast<osg::Vec4f*>(image->data(0,0,0))) = osg::Vec4f(1.0f, 1.0f, 1.0f, 1.0f);
42 
43     _clipTexture = new osg::Texture2D;
44     _clipTexture->setImage(image.get());
45     _clipTexture->setBorderColor(osg::Vec4f(1.0f,1.0f,1.0f,0.0f));
46     _clipTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_BORDER);
47     _clipTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_BORDER);
48     _clipTexture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
49     _clipTexture->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
50 
51     //image = osgDB::readImageFile("Images/lz.rgb");
52     //_clipTexture->setImage(image.get());
53 
54     _disabledDepthWrite = new osg::Depth(osg::Depth::LESS,0.0, 1.0,false);
55     _enabledDepthWrite = new osg::Depth(osg::Depth::LESS,0.0, 1.0,true);
56     _disableColorWriteMask = new osg::ColorMask(false, false, false, false);
57 }
58 
Style(const Style & style,const osg::CopyOp & copyop)59 Style::Style(const Style& style, const osg::CopyOp& copyop):
60     osg::Object(style, copyop),
61     _clipTexture(style._clipTexture)
62 {
63 }
64 
createFrame(const osg::BoundingBox & extents,const FrameSettings * frameSettings,const osg::Vec4 & color)65 osg::Node* Style::createFrame(const osg::BoundingBox& extents, const FrameSettings* frameSettings, const osg::Vec4& color)
66 {
67     // OSG_NOTICE<<"createFrame"<<std::endl;
68 
69     osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
70     geometry->setName("Frame");
71 
72     float topScale = 1.0f;
73     float bottomScale = 1.0f;
74     float leftScale = 1.0f;
75     float rightScale = 1.0f;
76 
77     if (frameSettings)
78     {
79         switch(frameSettings->getShadow())
80         {
81             case(FrameSettings::PLAIN):
82                 // default settings are appropriate for PLAIN
83                 break;
84             case(FrameSettings::SUNKEN):
85                 topScale = 0.6f;
86                 bottomScale = 1.2f;
87                 leftScale = 0.8f;
88                 rightScale = 0.8f;
89                 break;
90             case(FrameSettings::RAISED):
91                 topScale = 1.2f;
92                 bottomScale = 0.6f;
93                 leftScale = 0.8f;
94                 rightScale = 0.8f;
95                 break;
96         }
97     }
98 
99     osg::Vec4 topColor(osg::minimum(color.r()*topScale,1.0f), osg::minimum(color.g()*topScale,1.0f), osg::minimum(color.b()*topScale,1.0f), color.a());
100     osg::Vec4 bottomColor(osg::minimum(color.r()*bottomScale,1.0f), osg::minimum(color.g()*bottomScale,1.0f), osg::minimum(color.b()*bottomScale,1.0f), color.a());
101     osg::Vec4 leftColor(osg::minimum(color.r()*leftScale,1.0f), osg::minimum(color.g()*leftScale,1.0f), osg::minimum(color.b()*leftScale,1.0f), color.a());
102     osg::Vec4 rightColor(osg::minimum(color.r()*rightScale,1.0f), osg::minimum(color.g()*rightScale,1.0f), osg::minimum(color.b()*rightScale,1.0f), color.a());
103 
104     float lineWidth = frameSettings ? frameSettings->getLineWidth() : 1.0f;
105 
106     osg::Vec3 outerBottomLeft(extents.xMin(), extents.yMin(), extents.zMin());
107     osg::Vec3 outerBottomRight(extents.xMax(), extents.yMin(), extents.zMin());
108     osg::Vec3 outerTopLeft(extents.xMin(), extents.yMax(), extents.zMin());
109     osg::Vec3 outerTopRight(extents.xMax(), extents.yMax(), extents.zMin());
110 
111     osg::Vec3 innerBottomLeft(extents.xMin()+lineWidth, extents.yMin()+lineWidth, extents.zMin());
112     osg::Vec3 innerBottomRight(extents.xMax()-lineWidth, extents.yMin()+lineWidth, extents.zMin());
113     osg::Vec3 innerTopLeft(extents.xMin()+lineWidth, extents.yMax()-lineWidth, extents.zMin());
114     osg::Vec3 innerTopRight(extents.xMax()-lineWidth, extents.yMax()-lineWidth, extents.zMin());
115 
116     osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
117     geometry->setVertexArray(vertices.get());
118 
119     vertices->push_back( outerBottomLeft );   // 0
120     vertices->push_back( outerBottomRight );  // 1
121     vertices->push_back( outerTopLeft );      // 2
122     vertices->push_back( outerTopRight );     // 3
123 
124     vertices->push_back( innerBottomLeft );  // 4
125     vertices->push_back( innerBottomRight ); // 5
126     vertices->push_back( innerTopLeft );     // 6
127     vertices->push_back( innerTopRight );    // 7
128 
129     osg::ref_ptr<osg::Vec4Array> colours = new osg::Vec4Array;
130     geometry->setColorArray(colours.get(), osg::Array::BIND_PER_PRIMITIVE_SET);
131 
132     // bottom
133     {
134         colours->push_back(bottomColor);
135 
136         osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLE_STRIP);
137         geometry->addPrimitiveSet(primitives.get());
138         primitives->push_back(4);
139         primitives->push_back(0);
140         primitives->push_back(5);
141         primitives->push_back(1);
142     }
143 
144     // top
145     {
146         colours->push_back(topColor);
147 
148         osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLE_STRIP);
149         geometry->addPrimitiveSet(primitives.get());
150         primitives->push_back(2);
151         primitives->push_back(6);
152         primitives->push_back(3);
153         primitives->push_back(7);
154     }
155 
156     // left
157     {
158         colours->push_back(leftColor);
159 
160         osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLE_STRIP);
161         geometry->addPrimitiveSet(primitives.get());
162         primitives->push_back(2);
163         primitives->push_back(0);
164         primitives->push_back(6);
165         primitives->push_back(4);
166     }
167 
168     // right
169     {
170         colours->push_back(rightColor);
171 
172         osg::ref_ptr<osg::DrawElementsUShort> primitives = new osg::DrawElementsUShort(GL_TRIANGLE_STRIP);
173         geometry->addPrimitiveSet(primitives.get());
174         primitives->push_back(7);
175         primitives->push_back(5);
176         primitives->push_back(3);
177         primitives->push_back(1);
178     }
179 
180     return geometry.release();
181 }
182 
createText(const osg::BoundingBox & extents,const AlignmentSettings * as,const TextSettings * ts,const std::string & text)183 osg::Node* Style::createText(const osg::BoundingBox& extents, const AlignmentSettings* as, const TextSettings* ts, const std::string& text)
184 {
185     // OSG_NOTICE<<"createText"<<std::endl;
186 
187     osg::Vec4 textColor(0.0f,0.0,0.0f,1.0);
188 
189     osg::ref_ptr<osgText::Text> textDrawable = new osgText::Text;
190     textDrawable->setName("Text");
191 
192     textDrawable->setText(text);
193     textDrawable->setEnableDepthWrites(false);
194     textDrawable->setColor(textColor);
195 
196     if (ts)
197     {
198         textDrawable->setFont(ts->getFont());
199         textDrawable->setCharacterSize(ts->getCharacterSize());
200     }
201 
202     AlignmentSettings::Alignment alignment = as ? as->getAlignment() : AlignmentSettings::CENTER_CENTER;
203     textDrawable->setAlignment(static_cast<osgText::TextBase::AlignmentType>(alignment));
204 
205     switch(alignment)
206     {
207         case(AlignmentSettings::LEFT_TOP):
208             textDrawable->setPosition( osg::Vec3(extents.xMin(), extents.yMax(), extents.zMin()) );
209             break;
210         case(AlignmentSettings::LEFT_CENTER):
211             textDrawable->setPosition( osg::Vec3(extents.xMin(), (extents.yMin()+extents.yMax())*0.5f, extents.zMin()) );
212             break;
213         case(AlignmentSettings::LEFT_BOTTOM):
214             textDrawable->setPosition( osg::Vec3(extents.xMin(), extents.yMin(), extents.zMin()) );
215             break;
216 
217         case(AlignmentSettings::CENTER_TOP):
218             textDrawable->setPosition( osg::Vec3((extents.xMin()+extents.xMax())*0.5f, extents.yMax(), extents.zMin()) );
219             break;
220         case(AlignmentSettings::CENTER_CENTER):
221             textDrawable->setPosition( osg::Vec3((extents.xMin()+extents.xMax())*0.5f, (extents.yMin()+extents.yMax())*0.5f, extents.zMin()) );
222             break;
223         case(AlignmentSettings::CENTER_BOTTOM):
224             textDrawable->setPosition( osg::Vec3((extents.xMin()+extents.xMax())*0.5f, extents.yMin(), extents.zMin()) );
225             break;
226 
227         case(AlignmentSettings::RIGHT_TOP):
228             textDrawable->setPosition( osg::Vec3(extents.xMax(), extents.yMax(), extents.zMin()) );
229             break;
230         case(AlignmentSettings::RIGHT_CENTER):
231             textDrawable->setPosition( osg::Vec3(extents.xMax(), (extents.yMin()+extents.yMax())*0.5f, extents.zMin()) );
232             break;
233         case(AlignmentSettings::RIGHT_BOTTOM):
234             textDrawable->setPosition( osg::Vec3(extents.xMax(), extents.yMin(), extents.zMin()) );
235             break;
236 
237         case(AlignmentSettings::LEFT_BASE_LINE):
238             OSG_NOTICE<<"Text : LEFT_BASE_LINE"<<std::endl;
239             textDrawable->setPosition( osg::Vec3(extents.xMin(), (extents.yMin()+extents.yMax())*0.5f-textDrawable->getCharacterHeight()*0.5f, extents.zMin()) );
240             break;
241         case(AlignmentSettings::CENTER_BASE_LINE):
242             textDrawable->setPosition( osg::Vec3((extents.xMin()+extents.xMax())*0.5f, (extents.yMin()+extents.yMax())*0.5f-textDrawable->getCharacterHeight()*0.5, extents.zMin()) );
243             break;
244         case(AlignmentSettings::RIGHT_BASE_LINE):
245             textDrawable->setPosition( osg::Vec3(extents.xMax(), (extents.yMin()+extents.yMax())*0.5f-textDrawable->getCharacterHeight()*0.5, extents.zMin()) );
246             break;
247 
248         case(AlignmentSettings::LEFT_BOTTOM_BASE_LINE):
249         case(AlignmentSettings::CENTER_BOTTOM_BASE_LINE):
250         case(AlignmentSettings::RIGHT_BOTTOM_BASE_LINE):
251 
252         default:
253             textDrawable->setPosition( osg::Vec3(extents.xMin(), extents.yMin(), extents.zMin()) );
254             break;
255     }
256 
257     return textDrawable.release();
258 }
259 
createIcon(const osg::BoundingBox & extents,const std::string & filename,const osg::Vec4 & color)260 osg::Node* Style::createIcon(const osg::BoundingBox& extents, const std::string& filename, const osg::Vec4& color)
261 {
262     osg::ref_ptr<osg::Object> object = osgDB::readRefObjectFile(filename);
263     if (!object)
264     {
265         //OSG_NOTICE<<"Warning: Style::createIcon(.., "<<filename<<") could not find icon file."<<std::endl;
266         //return 0;
267     }
268 
269     osg::ref_ptr<osg::Image> image = dynamic_cast<osg::Image*>(object.get());
270     if (image.valid())
271     {
272         osg::Vec3 center(extents.center());
273         float width = extents.xMax()-extents.xMin();
274         float height = extents.yMax()-extents.yMin();
275         float extentsAspectRatio = height/width;
276 
277         float imageAspectRatio = static_cast<float>(image->t())/static_cast<float>(image->s());
278         if (imageAspectRatio>extentsAspectRatio) width *= (extentsAspectRatio/imageAspectRatio);
279         else height *= (imageAspectRatio/extentsAspectRatio);
280 
281         osg::ref_ptr<osg::Geometry> geometry = osg::createTexturedQuadGeometry(osg::Vec3(center.x()-width*0.5f,center.y()-height*0.5f,center.z()),
282                                                                                osg::Vec3(width, 0.0f, 0.0f),
283                                                                                osg::Vec3(0.0f, height, 0.0f));
284 
285         osg::ref_ptr<osg::Vec4Array> colors = new osg::Vec4Array;
286         colors->push_back(color);
287         geometry->setColorArray(colors.get(), osg::Array::BIND_OVERALL);
288 
289         osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(image.get());
290 
291         osg::ref_ptr<osg::StateSet> stateset = geometry->getOrCreateStateSet();
292         stateset->setTextureAttributeAndModes(0, texture.get(), osg::StateAttribute::ON);
293 
294         if (image->isImageTranslucent())
295         {
296             stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
297         }
298 
299         return geometry.release();
300     }
301 
302     osg::ref_ptr<osg::Node> node = dynamic_cast<osg::Node*>(object.get());
303     if (!node)
304     {
305         OSG_NOTICE<<"Warning: Style::createIcon(.., "<<filename<<") could not find icon file."<<std::endl;
306 
307         osg::ref_ptr<osg::ShapeDrawable> ds = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0,0.0,0.0),1.0));
308 
309         node = ds.get();
310 
311         //return 0;
312     }
313 
314     osg::ComputeBoundsVisitor cbv;
315     node->accept(cbv);
316     osg::BoundingBox bb = cbv.getBoundingBox();
317     osg::Vec3 bb_size(bb.xMax()-bb.xMin(), bb.zMax()-bb.zMin(), bb.zMax()-bb.zMin());
318 
319     osg::Vec3 scale( (bb_size.x()>0) ? (extents.xMax()-extents.xMin())/bb_size.x() : 1.0f,
320                      (bb_size.y()>0) ? (extents.yMax()-extents.yMin())/bb_size.y() : 1.0f,
321                      (bb_size.z()>0) ? (extents.zMax()-extents.zMin())/bb_size.z() : 1.0f);
322 
323     float minNonZeroScale = scale.x();
324     if (scale.y()!=0.0 && scale.y()<minNonZeroScale) minNonZeroScale = scale.y();
325     if (scale.z()!=0.0 && scale.z()<minNonZeroScale) minNonZeroScale = scale.z();
326 
327     scale.set(minNonZeroScale, minNonZeroScale, minNonZeroScale);
328 
329     // create Transform to rescale subgraph
330     osg::ref_ptr<osg::MatrixTransform> transform = new osg::MatrixTransform;
331     transform->setMatrix(osg::Matrix::translate(-bb.center()) *
332                          osg::Matrix::scale(scale) *
333                          osg::Matrix::translate(extents.center()));
334 
335 
336     transform->setDataVariance(osg::Transform::STATIC);
337     transform->addChild(node.get());
338 
339     osg::ref_ptr<osg::Group> group = new osg::Group;
340     group->addChild(transform.get());
341 
342     {
343         osgUtil::Optimizer::FlattenStaticTransformsVisitor fstv;
344         group->accept(fstv);
345         fstv.removeTransforms(group.get());
346     }
347 
348     if (group->getNumChildren()==1)
349     {
350         node = group->getChild(0);
351 
352         // remove references to avoid node from node being unreferenced afer the node ref_ptr<> is released().
353         group = 0;
354         transform = 0;
355 
356         return node.release();
357     }
358     else
359     {
360         OSG_NOTICE<<"Warning: Style::createIcon(.., "<<filename<<"), error in creation of icon."<<std::endl;
361         return 0;
362     }
363 }
364 
createPanel(const osg::BoundingBox & extents,const osg::Vec4 & colour)365 osg::Node* Style::createPanel(const osg::BoundingBox& extents, const osg::Vec4& colour)
366 {
367     // OSG_NOTICE<<"createPanel"<<std::endl;
368 
369     osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
370     geometry->setName("Panel");
371 
372     osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
373     geometry->setVertexArray(vertices.get());
374 
375     vertices->push_back( osg::Vec3(extents.xMin(), extents.yMin(), extents.zMin()) );
376     vertices->push_back( osg::Vec3(extents.xMin(), extents.yMax(), extents.zMin()) );
377     vertices->push_back( osg::Vec3(extents.xMax(), extents.yMin(), extents.zMin()) );
378     vertices->push_back( osg::Vec3(extents.xMax(), extents.yMax(), extents.zMin()) );
379 
380     osg::ref_ptr<osg::Vec4Array> colours = new osg::Vec4Array;
381     geometry->setColorArray(colours.get(), osg::Array::BIND_OVERALL);
382 
383     colours->push_back( colour );
384 
385     geometry->addPrimitiveSet( new osg::DrawArrays(GL_TRIANGLE_STRIP, 0, 4) );
386 
387     return geometry.release();
388 }
389 
390 
createDepthSetPanel(const osg::BoundingBox & extents)391 osg::Node* Style::createDepthSetPanel(const osg::BoundingBox& extents)
392 {
393     // OSG_NOTICE<<"createDepthSetPanel"<<std::endl;
394 
395     osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry;
396     geometry->setName("DepthSetPanel");
397 
398     osg::ref_ptr<osg::Vec3Array> vertices = new osg::Vec3Array;
399     geometry->setVertexArray(vertices.get());
400 
401     vertices->push_back( osg::Vec3(extents.xMin(), extents.yMin(), extents.zMin()) );
402     vertices->push_back( osg::Vec3(extents.xMin(), extents.yMax(), extents.zMin()) );
403     vertices->push_back( osg::Vec3(extents.xMax(), extents.yMin(), extents.zMin()) );
404     vertices->push_back( osg::Vec3(extents.xMax(), extents.yMax(), extents.zMin()) );
405 
406     geometry->addPrimitiveSet( new osg::DrawArrays(GL_TRIANGLE_STRIP, 0, 4) );
407 
408     osg::ref_ptr<osg::StateSet> stateset = geometry->getOrCreateStateSet();
409     stateset->setAttributeAndModes( _enabledDepthWrite.get(), osg::StateAttribute::ON | osg::StateAttribute::PROTECTED );
410     stateset->setAttributeAndModes( _disableColorWriteMask.get(), osg::StateAttribute::ON | osg::StateAttribute::PROTECTED );
411     stateset->setRenderBinDetails(20, "TraversalOrderBin", osg::StateSet::OVERRIDE_PROTECTED_RENDERBIN_DETAILS);
412     stateset->setNestRenderBins(false);
413 
414     return geometry.release();
415 }
416 
417 
setupDialogStateSet(osg::StateSet * stateset,int binNum)418 void Style::setupDialogStateSet(osg::StateSet* stateset, int binNum)
419 {
420     stateset->setRenderBinDetails(binNum, "TraversalOrderBin", osg::StateSet::OVERRIDE_PROTECTED_RENDERBIN_DETAILS);
421     stateset->setMode( GL_LIGHTING, osg::StateAttribute::OFF );
422     stateset->setAttributeAndModes( _disabledDepthWrite.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
423     stateset->setNestRenderBins(false);
424 }
425 
setupPopupStateSet(osg::StateSet *,int)426 void Style::setupPopupStateSet(osg::StateSet* /*stateset*/, int /*binNum*/)
427 {
428 }
429 
setupClipStateSet(const osg::BoundingBox & extents,osg::StateSet * stateset)430 void Style::setupClipStateSet(const osg::BoundingBox& extents, osg::StateSet* stateset)
431 {
432     unsigned int clipTextureUnit = 1;
433 
434     stateset->setAttributeAndModes( new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
435 
436     stateset->setTextureAttributeAndModes( clipTextureUnit, _clipTexture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
437 
438     osg::Matrixd matrix = osg::Matrixd::translate(osg::Vec3(-extents.xMin(), -extents.yMin(), -extents.zMin()))*
439                           osg::Matrixd::scale(osg::Vec3(1.0f/(extents.xMax()-extents.xMin()), 1.0f/(extents.yMax()-extents.yMin()), 1.0f));
440 
441     OSG_NOTICE<<"setupClipState("
442             <<extents.xMin()<<", "<<extents.yMin()<<", "<<extents.zMin()<<", "
443             <<extents.xMax()<<", "<<extents.yMax()<<", "<<extents.zMax()<<")"<<std::endl;
444 
445 
446     osg::ref_ptr<osg::TexGen> texgen = new osg::TexGen;
447     texgen->setPlanesFromMatrix(matrix);
448     texgen->setMode(osg::TexGen::OBJECT_LINEAR);
449     stateset->setTextureAttributeAndModes( clipTextureUnit, texgen.get(), osg::StateAttribute::ON);
450 }
451