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28a4c9c5 JH |
1 | /* |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
81a635d1 JH |
21 | #define GL_GLEXT_PROTOTYPES |
22 | #include <GL/gl.h> | |
23 | #include <GL/glext.h> | |
24 | ||
2858b391 JH |
25 | #include "logicdata.h" |
26 | #include "logicdatasnapshot.h" | |
28a4c9c5 JH |
27 | #include "logicsignal.h" |
28 | ||
2858b391 JH |
29 | using namespace boost; |
30 | using namespace std; | |
81a635d1 | 31 | |
2858b391 | 32 | LogicSignal::LogicSignal(QString name, shared_ptr<LogicData> data, |
28a4c9c5 | 33 | int probe_index) : |
2858b391 JH |
34 | Signal(name), |
35 | _data(data), | |
28a4c9c5 JH |
36 | _probe_index(probe_index) |
37 | { | |
38 | assert(_probe_index >= 0); | |
39 | } | |
e3f65ace | 40 | |
3b18c57d JH |
41 | void LogicSignal::paint(QGLWidget &widget, const QRect &rect, |
42 | uint64_t scale, int64_t offset) | |
e3f65ace | 43 | { |
2858b391 JH |
44 | Point2F *vertex; |
45 | ||
46 | vector< pair<int64_t, bool> > edges; | |
47 | ||
48 | assert(_data); | |
49 | ||
50 | const queue< shared_ptr<LogicDataSnapshot> > &snapshots = | |
51 | _data->get_snapshots(); | |
52 | if(snapshots.empty()) | |
53 | return; | |
54 | ||
55 | const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front(); | |
56 | ||
57 | const int64_t start = 0; | |
58 | const int64_t end = 8000; | |
59 | const int64_t quantization_length = 4; | |
60 | ||
61 | snapshot->get_subsampled_edges(edges, start, end, | |
62 | quantization_length, _probe_index); | |
63 | ||
64 | // Paint the edges | |
65 | const unsigned int edge_point_count = (edges.size() - 2) * 2; | |
66 | Point2F *const edge_points = new Point2F[edge_point_count]; | |
67 | vertex = edge_points; | |
68 | ||
69 | for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin() + 1; | |
70 | i != edges.end() - 1; i++) | |
71 | { | |
72 | const int x = edge.first / quantization_length + | |
73 | rect.left(); | |
74 | ||
75 | vertex->x = x, vertex->y = 10 + rect.top() - 1; | |
76 | vertex++; | |
77 | vertex->x = x, vertex->y = 40 + rect.top(); | |
78 | vertex++; | |
79 | } | |
81a635d1 JH |
80 | |
81 | glColor3f(0,0,1); | |
2858b391 JH |
82 | paint_lines(edge_points, edge_point_count); |
83 | delete[] edge_points; | |
84 | ||
85 | // Paint the caps | |
86 | const unsigned int cap_point_count = (edges.size() - 1) * 2; | |
87 | Point2F *const cap_points = new Point2F[cap_point_count]; | |
88 | vertex = cap_points; | |
89 | ||
90 | for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin(); | |
91 | i != (edges.end() - 1); i++) | |
92 | { | |
93 | const int y = ((*i).second ? 10 : 40) + rect.top(); | |
94 | ||
95 | vertex->x = (*i).first / quantization_length + | |
96 | rect.left() - 1; | |
97 | vertex->y = y; | |
98 | vertex++; | |
99 | ||
100 | vertex->x = (*(i+1)).first / quantization_length + | |
101 | rect.left(); | |
102 | vertex->y = y; | |
103 | vertex++; | |
104 | } | |
105 | ||
106 | glColor3f(0,0,1); | |
107 | paint_lines(cap_points, cap_point_count); | |
108 | delete[] cap_points; | |
109 | } | |
110 | ||
111 | void LogicSignal::paint_lines(Point2F *points, int count) | |
112 | { | |
113 | GLuint vbo_id; | |
114 | ||
115 | assert(points); | |
81a635d1 JH |
116 | |
117 | glGenBuffers(1, &vbo_id); | |
118 | glBindBuffer(GL_ARRAY_BUFFER, vbo_id); | |
119 | ||
2858b391 JH |
120 | const unsigned int vbo_length = count * sizeof(Point2F); |
121 | glBufferData(GL_ARRAY_BUFFER, vbo_length, NULL, GL_STATIC_DRAW); | |
122 | glBufferSubData(GL_ARRAY_BUFFER, 0, vbo_length, points); | |
81a635d1 JH |
123 | |
124 | glBindBuffer(GL_ARRAY_BUFFER, vbo_id); | |
125 | ||
2858b391 | 126 | glVertexPointer(2, GL_FLOAT, sizeof(Point2F), 0); |
81a635d1 JH |
127 | |
128 | glEnableClientState(GL_VERTEX_ARRAY); | |
2858b391 | 129 | glDrawArrays(GL_LINES, 0, count); |
81a635d1 | 130 | glDisableClientState(GL_VERTEX_ARRAY); |
2858b391 JH |
131 | |
132 | glDeleteBuffers(1, &vbo_id); | |
e3f65ace | 133 | } |