2 * This file is part of the sigrok project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
21 #define GL_GLEXT_PROTOTYPES
25 #include "logicdata.h"
26 #include "logicdatasnapshot.h"
27 #include "logicsignal.h"
29 using namespace boost;
32 LogicSignal::LogicSignal(QString name, shared_ptr<LogicData> data,
36 _probe_index(probe_index)
38 assert(_probe_index >= 0);
41 void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
42 uint64_t scale, int64_t offset)
46 vector< pair<int64_t, bool> > edges;
50 const queue< shared_ptr<LogicDataSnapshot> > &snapshots =
51 _data->get_snapshots();
55 const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front();
57 const int64_t start = 0;
58 const int64_t end = 8000;
59 const int64_t quantization_length = 4;
61 snapshot->get_subsampled_edges(edges, start, end,
62 quantization_length, _probe_index);
65 const unsigned int edge_point_count = (edges.size() - 2) * 2;
66 Point2F *const edge_points = new Point2F[edge_point_count];
69 for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin() + 1;
70 i != edges.end() - 1; i++)
72 const int x = edge.first / quantization_length +
75 vertex->x = x, vertex->y = 10 + rect.top() - 1;
77 vertex->x = x, vertex->y = 40 + rect.top();
82 paint_lines(edge_points, edge_point_count);
86 const unsigned int cap_point_count = (edges.size() - 1) * 2;
87 Point2F *const cap_points = new Point2F[cap_point_count];
90 for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin();
91 i != (edges.end() - 1); i++)
93 const int y = ((*i).second ? 10 : 40) + rect.top();
95 vertex->x = (*i).first / quantization_length +
100 vertex->x = (*(i+1)).first / quantization_length +
107 paint_lines(cap_points, cap_point_count);
111 void LogicSignal::paint_lines(Point2F *points, int count)
117 glGenBuffers(1, &vbo_id);
118 glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
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);
124 glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
126 glVertexPointer(2, GL_FLOAT, sizeof(Point2F), 0);
128 glEnableClientState(GL_VERTEX_ARRAY);
129 glDrawArrays(GL_LINES, 0, count);
130 glDisableClientState(GL_VERTEX_ARRAY);
132 glDeleteBuffers(1, &vbo_id);