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aba1dd16 JH |
1 | /* |
2 | * This file is part of the PulseView 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 | ||
21 | #include <extdef.h> | |
22 | ||
23 | #include <math.h> | |
24 | ||
25 | #include "analogsignal.h" | |
1b1ec774 JH |
26 | #include "pv/data/analog.h" |
27 | #include "pv/data/analogsnapshot.h" | |
aba1dd16 JH |
28 | |
29 | using namespace boost; | |
30 | using namespace std; | |
31 | ||
32 | namespace pv { | |
33 | namespace view { | |
34 | ||
568b90d4 JH |
35 | const QColor AnalogSignal::SignalColours[4] = { |
36 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
37 | QColor(0x87, 0x20, 0x7A), // Magenta | |
38 | QColor(0x20, 0x4A, 0x87), // Blue | |
39 | QColor(0x4E, 0x9A, 0x06) // Green | |
40 | }; | |
41 | ||
42 | AnalogSignal::AnalogSignal(QString name, shared_ptr<data::Analog> data, | |
43 | int probe_index) : | |
aba1dd16 JH |
44 | Signal(name), |
45 | _data(data) | |
46 | { | |
568b90d4 | 47 | _colour = SignalColours[probe_index % countof(SignalColours)]; |
aba1dd16 JH |
48 | } |
49 | ||
2658961b | 50 | void AnalogSignal::paint(QPainter &p, int y, int left, int right, double scale, |
aba1dd16 JH |
51 | double offset) |
52 | { | |
a8acb46e JH |
53 | assert(scale > 0); |
54 | assert(_data); | |
2658961b | 55 | assert(right >= left); |
a8acb46e | 56 | |
3ef6182a JH |
57 | paint_axis(p, y, left, right); |
58 | ||
1b1ec774 | 59 | const deque< shared_ptr<pv::data::AnalogSnapshot> > &snapshots = |
a8acb46e JH |
60 | _data->get_snapshots(); |
61 | if (snapshots.empty()) | |
62 | return; | |
63 | ||
1b1ec774 | 64 | const shared_ptr<pv::data::AnalogSnapshot> &snapshot = |
a8acb46e JH |
65 | snapshots.front(); |
66 | ||
67 | const double pixels_offset = offset / scale; | |
68 | const double samplerate = _data->get_samplerate(); | |
69 | const double start_time = _data->get_start_time(); | |
70 | const int64_t last_sample = snapshot->get_sample_count() - 1; | |
71 | const double samples_per_pixel = samplerate * scale; | |
72 | const double start = samplerate * (offset - start_time); | |
2658961b | 73 | const double end = start + samples_per_pixel * (right - left); |
a8acb46e JH |
74 | |
75 | const int64_t start_sample = min(max((int64_t)floor(start), | |
76 | (int64_t)0), last_sample); | |
77 | const int64_t end_sample = min(max((int64_t)ceil(end), | |
78 | (int64_t)0), last_sample); | |
d3758367 | 79 | const int64_t sample_count = end_sample - start_sample; |
a8acb46e | 80 | |
d3758367 JH |
81 | const float* samples = snapshot->get_samples( |
82 | start_sample, end_sample); | |
a8acb46e JH |
83 | assert(samples); |
84 | ||
d3758367 | 85 | QPointF *points = new QPointF[sample_count]; |
a8acb46e JH |
86 | QPointF *point = points; |
87 | ||
88 | for (int64_t sample = start_sample; | |
89 | sample != end_sample; sample++) { | |
90 | const float x = (sample / samples_per_pixel - | |
2658961b | 91 | pixels_offset) + left; |
d3758367 JH |
92 | *point++ = QPointF(x, |
93 | samples[sample - start_sample] + y); | |
a8acb46e JH |
94 | } |
95 | ||
043ce060 | 96 | p.setPen(_colour); |
a8acb46e JH |
97 | p.drawPoints(points, point - points); |
98 | ||
99 | delete[] points; | |
aba1dd16 JH |
100 | } |
101 | ||
aba1dd16 JH |
102 | } // namespace view |
103 | } // namespace pv |