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comparison Framework/Fonts/OpenGLTextCoordinates.cpp @ 577:b098a3aaf694

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alphabet of glyphs
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 19 Apr 2019 15:42:57 +0200
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children 9a474e90e832
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576:529c9617654b 577:b098a3aaf694
1 /**
2 * Stone of Orthanc
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Affero General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Affero General Public License for more details.
16 *
17 * You should have received a copy of the GNU Affero General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 **/
20
21
22 #include "OpenGLTextCoordinates.h"
23
24 #include <Core/OrthancException.h>
25
26 namespace OrthancStone
27 {
28 namespace OpenGL
29 {
30 void OpenGLTextCoordinates::Visit(uint32_t unicode,
31 int x,
32 int y,
33 unsigned int width,
34 unsigned int height,
35 const Orthanc::IDynamicObject* payload)
36 {
37 // Rendering coordinates
38 float rx1 = x - box_.GetLeft();
39 float ry1 = y - box_.GetTop();
40 float rx2 = rx1 + static_cast<float>(width);
41 float ry2 = ry1 + static_cast<float>(height);
42
43 // Texture coordinates
44 assert(payload != NULL);
45 const GlyphTextureAlphabet::TextureLocation& location =
46 *dynamic_cast<const GlyphTextureAlphabet::TextureLocation*>(payload);
47
48 float tx1 = location.GetX() / textureWidth_;
49 float ty1 = location.GetY() / textureHeight_;
50 float tx2 = tx1 + (static_cast<float>(width) / textureWidth_);
51 float ty2 = ty1 + (static_cast<float>(height) / textureHeight_);
52
53 const float rpos[6][2] = {
54 { rx1, ry1 },
55 { rx1, ry2 },
56 { rx2, ry1 },
57 { rx2, ry1 },
58 { rx1, ry2 },
59 { rx2, ry2 }
60 };
61
62 const float tpos[6][2] = {
63 { tx1, ty1 },
64 { tx1, ty2 },
65 { tx2, ty1 },
66 { tx2, ty1 },
67 { tx1, ty2 },
68 { tx2, ty2 }
69 };
70
71 for (unsigned int i = 0; i < 6; i++)
72 {
73 renderingCoords_.push_back(rpos[i][0]);
74 renderingCoords_.push_back(rpos[i][1]);
75 textureCoords_.push_back(tpos[i][0]);
76 textureCoords_.push_back(tpos[i][1]);
77 }
78 }
79
80
81 OpenGLTextCoordinates::OpenGLTextCoordinates(const GlyphTextureAlphabet& alphabet,
82 const std::string& utf8) :
83 box_(alphabet.GetAlphabet(), utf8),
84 textureWidth_(alphabet.GetTextureWidth()),
85 textureHeight_(alphabet.GetTextureHeight())
86 {
87 if (textureWidth_ <= 0 ||
88 textureHeight_ <= 0)
89 {
90 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
91 }
92
93 width_ = static_cast<float>(box_.GetWidth());
94 height_ = static_cast<float>(box_.GetHeight());
95
96 // Each character is made of two 2D triangles (= 2 * 3 * 2 = 12)
97 renderingCoords_.reserve(box_.GetCharactersCount() * 12);
98 textureCoords_.reserve(box_.GetCharactersCount() * 12);
99
100 alphabet.GetAlphabet().Apply(*this, utf8);
101 }
102
103
104 const std::vector<float>& OpenGLTextCoordinates::GetRenderingCoords() const
105 {
106 assert(renderingCoords_.size() == textureCoords_.size());
107 return renderingCoords_;
108 }
109
110
111 const std::vector<float>& OpenGLTextCoordinates::GetTextureCoords() const
112 {
113 assert(renderingCoords_.size() == textureCoords_.size());
114 return textureCoords_;
115 }
116 }
117 }