ADTF Display Toolbox
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font.h
1/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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#pragma once
15
16#include <map>
17
18#include <osg/ref_ptr>
19#include <osg/Notify>
20#include <osgText/Font>
21
22class cInstanceFont : public osgText::Font
23{
24public:
25 cInstanceFont()
26 {
27 _minFilterHint = osg::Texture::LINEAR_MIPMAP_LINEAR;
28 _magFilterHint = osg::Texture::NEAREST;
29 constructGlyphs();
30 }
31
32 virtual ~cInstanceFont()
33 {
34 }
35
36 virtual std::string getFileName() const
37 {
38 return "";
39 }
40
42 virtual void setSize(unsigned int /*width*/, unsigned int /*height*/)
43 {
44 osg::notify(osg::INFO) << "DefaultFont::setSize(,) call is ignored." << std::endl;
45 }
46
47 virtual osgText::Glyph* getGlyph(const osgText::FontResolution& fontRes, unsigned int charcode)
48 {
49 if (_sizeGlyphMap.empty())
50 return 0;
51
52 FontSizeGlyphMap::iterator itr = _sizeGlyphMap.find(fontRes);
53 if (itr == _sizeGlyphMap.end())
54 {
55 // no font found of correct size, will need to find the nearest.
56 itr = _sizeGlyphMap.begin();
57 int mindeviation =
58 abs((int) fontRes.first - (int) itr->first.first) + abs((int) fontRes.second - (int) itr->first.second);
59 FontSizeGlyphMap::iterator sitr = itr;
60 ++sitr;
61 for (; sitr != _sizeGlyphMap.end(); ++sitr)
62 {
63 int deviation = abs((int) fontRes.first - (int) sitr->first.first) +
64 abs((int) fontRes.second - (int) sitr->first.second);
65 if (deviation < mindeviation)
66 {
67 mindeviation = deviation;
68 itr = sitr;
69 }
70 }
71 }
72
73 // new find the glyph for the required charcode.
74 GlyphMap& glyphmap = itr->second;
75 GlyphMap::iterator gitr = glyphmap.find(charcode);
76
77 if (gitr != glyphmap.end())
78 {
79 return gitr->second.get();
80 }
81 else
82 {
83 return 0;
84 }
85 }
86
87 virtual osg::Vec2 getKerning(const osgText::FontResolution&,
88 unsigned int /*leftcharcode*/,
89 unsigned int /*rightcharcode*/,
90 osgText::KerningType /*kerningType*/)
91 {
92 // no kerning on default font.
93 return osg::Vec2(0.0f, 0.0f);
94 }
95
96 virtual bool hasVertical() const
97 {
98 return true;
99 }
100
101protected:
102 void constructGlyphs()
103 {
104 constexpr GLubyte rasters[][12] = {// ascii symbols 32-127, small font
105 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
106 {0x00, 0x00, 0x08, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00},
107 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x14, 0x14, 0x14, 0x00},
108 {0x00, 0x00, 0x28, 0x28, 0x7e, 0x14, 0x14, 0x14, 0x3f, 0x0a, 0x0a, 0x00},
109 {0x00, 0x00, 0x08, 0x1c, 0x22, 0x02, 0x1c, 0x20, 0x22, 0x1c, 0x08, 0x00},
110 {0x00, 0x00, 0x02, 0x45, 0x22, 0x10, 0x08, 0x04, 0x22, 0x51, 0x20, 0x00},
111 {0x00, 0x00, 0x3b, 0x44, 0x4a, 0x49, 0x30, 0x10, 0x20, 0x20, 0x18, 0x00},
112 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x00},
113 {0x04, 0x08, 0x08, 0x10, 0x10, 0x10, 0x10, 0x10, 0x08, 0x08, 0x04, 0x00},
114 {0x10, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x10, 0x00},
115 {0x00, 0x00, 0x00, 0x00, 0x36, 0x1c, 0x7f, 0x1c, 0x36, 0x00, 0x00, 0x00},
116 {0x00, 0x00, 0x08, 0x08, 0x08, 0x7f, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00},
117 {0x00, 0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
118 {0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
119 {0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
120 {0x00, 0x00, 0x00, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00},
121 {0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x1c, 0x00},
122 {0x00, 0x00, 0x3e, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x38, 0x08, 0x00},
123 {0x00, 0x00, 0x3e, 0x20, 0x10, 0x08, 0x04, 0x02, 0x02, 0x22, 0x1c, 0x00},
124 {0x00, 0x00, 0x1c, 0x22, 0x02, 0x02, 0x0c, 0x02, 0x02, 0x22, 0x1c, 0x00},
125 {0x00, 0x00, 0x0e, 0x04, 0x3e, 0x24, 0x14, 0x14, 0x0c, 0x0c, 0x04, 0x00},
126 {0x00, 0x00, 0x1c, 0x22, 0x02, 0x02, 0x3c, 0x20, 0x20, 0x20, 0x3e, 0x00},
127 {0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x3c, 0x20, 0x20, 0x10, 0x0c, 0x00},
128 {0x00, 0x00, 0x10, 0x10, 0x08, 0x08, 0x04, 0x04, 0x02, 0x22, 0x3e, 0x00},
129 {0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x1c, 0x22, 0x22, 0x22, 0x1c, 0x00},
130 {0x00, 0x00, 0x18, 0x04, 0x02, 0x02, 0x1e, 0x22, 0x22, 0x22, 0x1c, 0x00},
131 {0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00},
132 {0x00, 0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00},
133 {0x00, 0x00, 0x04, 0x08, 0x10, 0x20, 0x10, 0x08, 0x04, 0x00, 0x00, 0x00},
134 {0x00, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x00},
135 {0x00, 0x00, 0x10, 0x08, 0x04, 0x02, 0x04, 0x08, 0x10, 0x00, 0x00, 0x00},
136 {0x00, 0x00, 0x08, 0x00, 0x08, 0x08, 0x04, 0x02, 0x02, 0x22, 0x1c, 0x00},
137 {0x00, 0x00, 0x1c, 0x20, 0x4e, 0x55, 0x55, 0x55, 0x4d, 0x21, 0x1e, 0x00},
138 {0x00, 0x00, 0x77, 0x22, 0x3e, 0x22, 0x14, 0x14, 0x08, 0x08, 0x18, 0x00},
139 {0x00, 0x00, 0x7e, 0x21, 0x21, 0x21, 0x3e, 0x21, 0x21, 0x21, 0x7e, 0x00},
140 {0x00, 0x00, 0x1e, 0x21, 0x40, 0x40, 0x40, 0x40, 0x40, 0x21, 0x1e, 0x00},
141 {0x00, 0x00, 0x7c, 0x22, 0x21, 0x21, 0x21, 0x21, 0x21, 0x22, 0x7c, 0x00},
142 {0x00, 0x00, 0x7f, 0x21, 0x20, 0x24, 0x3c, 0x24, 0x20, 0x21, 0x7f, 0x00},
143 {0x00, 0x00, 0x78, 0x20, 0x20, 0x24, 0x3c, 0x24, 0x20, 0x21, 0x7f, 0x00},
144 {0x00, 0x00, 0x1e, 0x21, 0x41, 0x47, 0x40, 0x40, 0x40, 0x21, 0x1e, 0x00},
145 {0x00, 0x00, 0x77, 0x22, 0x22, 0x22, 0x3e, 0x22, 0x22, 0x22, 0x77, 0x00},
146 {0x00, 0x00, 0x3e, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x3e, 0x00},
147 {0x00, 0x00, 0x38, 0x44, 0x44, 0x04, 0x04, 0x04, 0x04, 0x04, 0x1e, 0x00},
148 {0x00, 0x00, 0x73, 0x22, 0x24, 0x38, 0x28, 0x24, 0x24, 0x22, 0x73, 0x00},
149 {0x00, 0x00, 0x7f, 0x11, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x7c, 0x00},
150 {0x00, 0x00, 0x77, 0x22, 0x22, 0x2a, 0x2a, 0x36, 0x36, 0x22, 0x63, 0x00},
151 {0x00, 0x00, 0x72, 0x22, 0x26, 0x26, 0x2a, 0x32, 0x32, 0x22, 0x67, 0x00},
152 {0x00, 0x00, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c, 0x00},
153 {0x00, 0x00, 0x78, 0x20, 0x20, 0x20, 0x3e, 0x21, 0x21, 0x21, 0x7e, 0x00},
154 {0x00, 0x1b, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c, 0x00},
155 {0x00, 0x00, 0x73, 0x22, 0x24, 0x24, 0x3e, 0x21, 0x21, 0x21, 0x7e, 0x00},
156 {0x00, 0x00, 0x3e, 0x41, 0x01, 0x01, 0x3e, 0x40, 0x40, 0x41, 0x3e, 0x00},
157 {0x00, 0x00, 0x1c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x49, 0x7f, 0x00},
158 {0x00, 0x00, 0x1c, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x77, 0x00},
159 {0x00, 0x00, 0x08, 0x08, 0x14, 0x14, 0x14, 0x22, 0x22, 0x22, 0x77, 0x00},
160 {0x00, 0x00, 0x14, 0x14, 0x2a, 0x2a, 0x2a, 0x22, 0x22, 0x22, 0x77, 0x00},
161 {0x00, 0x00, 0x77, 0x22, 0x14, 0x14, 0x08, 0x14, 0x14, 0x22, 0x77, 0x00},
162 {0x00, 0x00, 0x1c, 0x08, 0x08, 0x08, 0x14, 0x14, 0x22, 0x22, 0x77, 0x00},
163 {0x00, 0x00, 0x7f, 0x21, 0x10, 0x10, 0x08, 0x04, 0x04, 0x42, 0x7f, 0x00},
164 {0x1c, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x1c, 0x00},
165 {0x00, 0x00, 0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x00, 0x00},
166 {0x1c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x1c, 0x00},
167 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x22, 0x14, 0x08},
168 {0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
169 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x10, 0x00},
170 {0x00, 0x00, 0x3d, 0x42, 0x42, 0x3e, 0x02, 0x3c, 0x00, 0x00, 0x00, 0x00},
171 {0x00, 0x00, 0x7e, 0x21, 0x21, 0x21, 0x21, 0x3e, 0x20, 0x20, 0x60, 0x00},
172 {0x00, 0x00, 0x3e, 0x41, 0x40, 0x40, 0x41, 0x3e, 0x00, 0x00, 0x00, 0x00},
173 {0x00, 0x00, 0x3f, 0x42, 0x42, 0x42, 0x42, 0x3e, 0x02, 0x02, 0x06, 0x00},
174 {0x00, 0x00, 0x3e, 0x41, 0x40, 0x7f, 0x41, 0x3e, 0x00, 0x00, 0x00, 0x00},
175 {0x00, 0x00, 0x3c, 0x10, 0x10, 0x10, 0x10, 0x3c, 0x10, 0x10, 0x0c, 0x00},
176 {0x3c, 0x02, 0x02, 0x3e, 0x42, 0x42, 0x42, 0x3f, 0x00, 0x00, 0x00, 0x00},
177 {0x00, 0x00, 0x77, 0x22, 0x22, 0x22, 0x32, 0x2c, 0x20, 0x20, 0x60, 0x00},
178 {0x00, 0x00, 0x3e, 0x08, 0x08, 0x08, 0x08, 0x38, 0x00, 0x00, 0x08, 0x00},
179 {0x38, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x3c, 0x00, 0x00, 0x04, 0x00},
180 {0x00, 0x00, 0x63, 0x24, 0x38, 0x28, 0x24, 0x26, 0x20, 0x20, 0x60, 0x00},
181 {0x00, 0x00, 0x3e, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x18, 0x00},
182 {0x00, 0x00, 0x6b, 0x2a, 0x2a, 0x2a, 0x2a, 0x74, 0x00, 0x00, 0x00, 0x00},
183 {0x00, 0x00, 0x77, 0x22, 0x22, 0x22, 0x32, 0x6c, 0x00, 0x00, 0x00, 0x00},
184 {0x00, 0x00, 0x3e, 0x41, 0x41, 0x41, 0x41, 0x3e, 0x00, 0x00, 0x00, 0x00},
185 {0x70, 0x20, 0x3e, 0x21, 0x21, 0x21, 0x21, 0x7e, 0x00, 0x00, 0x00, 0x00},
186 {0x07, 0x02, 0x3e, 0x42, 0x42, 0x42, 0x42, 0x3f, 0x00, 0x00, 0x00, 0x00},
187 {0x00, 0x00, 0x7c, 0x10, 0x10, 0x10, 0x19, 0x76, 0x00, 0x00, 0x00, 0x00},
188 {0x00, 0x00, 0x3e, 0x41, 0x06, 0x38, 0x41, 0x3e, 0x00, 0x00, 0x00, 0x00},
189 {0x00, 0x00, 0x0c, 0x12, 0x10, 0x10, 0x10, 0x3c, 0x10, 0x10, 0x00, 0x00},
190 {0x00, 0x00, 0x1b, 0x26, 0x22, 0x22, 0x22, 0x66, 0x00, 0x00, 0x00, 0x00},
191 {0x00, 0x00, 0x08, 0x14, 0x14, 0x22, 0x22, 0x77, 0x00, 0x00, 0x00, 0x00},
192 {0x00, 0x00, 0x14, 0x14, 0x2a, 0x2a, 0x22, 0x77, 0x00, 0x00, 0x00, 0x00},
193 {0x00, 0x00, 0x77, 0x22, 0x1c, 0x1c, 0x22, 0x77, 0x00, 0x00, 0x00, 0x00},
194 {0x30, 0x08, 0x08, 0x14, 0x14, 0x22, 0x22, 0x77, 0x00, 0x00, 0x00, 0x00},
195 {0x00, 0x00, 0x7e, 0x22, 0x10, 0x08, 0x44, 0x7e, 0x00, 0x00, 0x00, 0x00},
196 {0x06, 0x08, 0x08, 0x08, 0x08, 0x30, 0x08, 0x08, 0x08, 0x08, 0x06, 0x00},
197 {0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08},
198 {0x30, 0x08, 0x08, 0x08, 0x08, 0x06, 0x08, 0x08, 0x08, 0x08, 0x30, 0x00},
199 {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x49, 0x31, 0x00, 0x00},
200 {0x00, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x00, 0x00}};
201
202 unsigned int sourceWidth = 8;
203 unsigned int sourceHeight = 12;
204
205 osgText::FontResolution fontRes(sourceWidth, sourceHeight);
206
207 // populate the glyph mp
208 for (unsigned int i = 32; i < 127; i++)
209 {
210 osg::ref_ptr<osgText::Glyph> glyph = new osgText::Glyph(this, i);
211
212 unsigned int dataSize = sourceWidth * sourceHeight;
213 unsigned char* data = new unsigned char[dataSize];
214
215 // clear the image to zeros.
216 for (unsigned char* p = data; p < data + dataSize;)
217 {
218 *p++ = 0;
219 }
220
221 glyph->setImage(sourceWidth, sourceHeight, 1, GL_ALPHA, GL_ALPHA, GL_UNSIGNED_BYTE, data,
222 osg::Image::USE_NEW_DELETE, 1);
223
224 glyph->setInternalTextureFormat(GL_ALPHA);
225
226 // now populate data array by converting bitmap into a luminance_alpha map.
227 const unsigned char* ptr = rasters[i - 32];
228 unsigned char value_on = 255;
229 unsigned char value_off = 0;
230
231 for (unsigned int row = 0; row < sourceHeight; ++row, ++ptr)
232 {
233 (*data++) = ((*ptr) & 128) ? value_on : value_off;
234 (*data++) = ((*ptr) & 64) ? value_on : value_off;
235 (*data++) = ((*ptr) & 32) ? value_on : value_off;
236 (*data++) = ((*ptr) & 16) ? value_on : value_off;
237 (*data++) = ((*ptr) & 8) ? value_on : value_off;
238 (*data++) = ((*ptr) & 4) ? value_on : value_off;
239 (*data++) = ((*ptr) & 2) ? value_on : value_off;
240 (*data++) = ((*ptr) & 1) ? value_on : value_off;
241 }
242
243 glyph->setHorizontalBearing(osg::Vec2(0.0f, 0.0f)); // bottom left.
244 glyph->setHorizontalAdvance((float) 1.2);
245 glyph->setVerticalBearing(osg::Vec2((float) sourceWidth * 0.5f, (float) sourceHeight)); // top middle.
246 glyph->setVerticalAdvance((float) 1.2);
247
248 addGlyph(fontRes, i, glyph.get());
249 }
250 }
251};
cInstanceFont::setSize
virtual void setSize(unsigned int, unsigned int)
NOP with DefaultFont since it only supports a single fixed sized font.
Definition font.h:42