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
29 #include "logicdata.h"
30 #include "logicdatasnapshot.h"
31 #include "logicsignal.h"
33 using namespace boost;
36 const float Log2 = logf(2.0f);
38 const float LogicSignal::Margin = 10.0f;
40 const float LogicSignal::EdgeColour[3] = {0.50f, 0.50f, 0.50f};
41 const float LogicSignal::HighColour[3] = {0.00f, 0.75f, 0.00f};
42 const float LogicSignal::LowColour[3] = {0.75f, 0.00f, 0.00f};
44 const QColor LogicSignal::LogicSignalColours[10] = {
45 QColor(0x16, 0x19, 0x1A), // Black
46 QColor(0x8F, 0x52, 0x02), // Brown
47 QColor(0xCC, 0x00, 0x00), // Red
48 QColor(0xF5, 0x79, 0x00), // Orange
49 QColor(0xED, 0xD4, 0x00), // Yellow
50 QColor(0x73, 0xD2, 0x16), // Green
51 QColor(0x34, 0x65, 0xA4), // Blue
52 QColor(0x75, 0x50, 0x7B), // Violet
53 QColor(0x88, 0x8A, 0x85), // Grey
54 QColor(0xEE, 0xEE, 0xEC), // White
57 LogicSignal::LogicSignal(QString name, shared_ptr<LogicData> data,
61 _probe_index(probe_index)
63 assert(_probe_index >= 0);
66 void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
67 double scale, double offset)
71 vector< pair<int64_t, bool> > edges;
76 const float high_offset = rect.top() + Margin;
77 const float low_offset = rect.bottom() - Margin;
79 const queue< shared_ptr<LogicDataSnapshot> > &snapshots =
80 _data->get_snapshots();
84 const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front();
86 const double pixels_offset = offset / scale;
87 const double samplerate = _data->get_samplerate();
88 const double start_time = _data->get_start_time();
89 const int64_t last_sample = snapshot->get_sample_count() - 1;
90 const double samples_per_pixel = samplerate * scale;
91 const double start = samplerate * (offset - start_time);
92 const double end = start + samples_per_pixel * rect.width();
93 const int64_t quantization_length = 1LL << (int64_t)floorf(
94 max(logf((float)samples_per_pixel) / Log2, 0.0f));
96 snapshot->get_subsampled_edges(edges,
97 min(max((int64_t)floor(start), (int64_t)0), last_sample),
98 min(max((int64_t)ceil(end), (int64_t)0), last_sample),
99 quantization_length, _probe_index);
102 const unsigned int edge_point_count = (edges.size() - 2) * 2;
103 Point2F *const edge_points = new Point2F[edge_point_count];
104 vertex = edge_points;
106 for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin() + 1;
107 i != edges.end() - 1; i++)
109 const int x = (int)((*i).first / samples_per_pixel - pixels_offset) +
112 vertex->x = x, vertex->y = high_offset;
114 vertex->x = x, vertex->y = low_offset;
118 glColor3fv(EdgeColour);
119 paint_lines(edge_points, edge_point_count);
120 delete[] edge_points;
123 const unsigned int max_cap_point_count = (edges.size() - 1) * 2;
124 Point2F *const cap_points = new Point2F[max_cap_point_count];
126 glColor3fv(HighColour);
127 paint_caps(cap_points, edges, true, samples_per_pixel,
128 pixels_offset, rect.left(), high_offset);
129 glColor3fv(LowColour);
130 paint_caps(cap_points, edges, false, samples_per_pixel,
131 pixels_offset, rect.left(), low_offset);
136 int LogicSignal::paint_caps(Point2F *const cap_points,
137 vector< pair<int64_t, bool> > &edges, bool level,
138 double samples_per_pixel, double pixels_offset, int x_offset,
141 Point2F *vertex = cap_points;
143 for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin();
144 i != (edges.end() - 1); i++)
145 if((*i).second == level)
147 vertex->x = (int)((*i).first / samples_per_pixel -
148 pixels_offset) + x_offset - 1;
149 vertex->y = y_offset;
152 vertex->x = (int)((*(i+1)).first / samples_per_pixel -
153 pixels_offset) + x_offset;
154 vertex->y = y_offset;
158 paint_lines(cap_points, vertex - cap_points);
161 void LogicSignal::paint_lines(Point2F *points, int count)
167 glGenBuffers(1, &vbo_id);
168 glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
170 const unsigned int vbo_length = count * sizeof(Point2F);
171 glBufferData(GL_ARRAY_BUFFER, vbo_length, NULL, GL_STATIC_DRAW);
172 glBufferSubData(GL_ARRAY_BUFFER, 0, vbo_length, points);
174 glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
176 glVertexPointer(2, GL_FLOAT, sizeof(Point2F), 0);
178 glEnableClientState(GL_VERTEX_ARRAY);
179 glDrawArrays(GL_LINES, 0, count);
180 glDisableClientState(GL_VERTEX_ARRAY);
182 glDeleteBuffers(1, &vbo_id);
185 QColor LogicSignal::get_colour() const
187 return LogicSignalColours[_probe_index % countof(LogicSignalColours)];
190 int LogicSignal::get_nominal_offset(const QRect &rect) const
192 return rect.bottom() - Margin;