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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 <cassert> | |
24 | #include <cmath> | |
25 | #include <cstdlib> | |
26 | #include <limits> | |
27 | ||
28 | #include <QApplication> | |
29 | #include <QComboBox> | |
30 | #include <QFormLayout> | |
31 | #include <QGridLayout> | |
32 | #include <QLabel> | |
33 | #include <QSpinBox> | |
34 | #include <QString> | |
35 | ||
36 | #include "analogsignal.hpp" | |
37 | #include "pv/data/analog.hpp" | |
38 | #include "pv/data/analogsegment.hpp" | |
39 | #include "pv/data/signalbase.hpp" | |
40 | #include "pv/view/view.hpp" | |
41 | ||
42 | #include <libsigrokcxx/libsigrokcxx.hpp> | |
43 | ||
44 | using std::max; | |
45 | using std::make_pair; | |
46 | using std::min; | |
47 | using std::shared_ptr; | |
48 | using std::deque; | |
49 | ||
50 | namespace pv { | |
51 | namespace views { | |
52 | namespace TraceView { | |
53 | ||
54 | const QColor AnalogSignal::SignalColours[4] = { | |
55 | QColor(0xC4, 0xA0, 0x00), // Yellow | |
56 | QColor(0x87, 0x20, 0x7A), // Magenta | |
57 | QColor(0x20, 0x4A, 0x87), // Blue | |
58 | QColor(0x4E, 0x9A, 0x06) // Green | |
59 | }; | |
60 | ||
61 | const QColor AnalogSignal::GridMajorColor = QColor(0, 0, 0, 40*256/100); | |
62 | const QColor AnalogSignal::GridMinorColor = QColor(0, 0, 0, 20*256/100); | |
63 | ||
64 | const float AnalogSignal::EnvelopeThreshold = 256.0f; | |
65 | ||
66 | const int AnalogSignal::MaximumVDivs = 10; | |
67 | const int AnalogSignal::MinScaleIndex = -6; | |
68 | const int AnalogSignal::MaxScaleIndex = 7; | |
69 | ||
70 | const int AnalogSignal::InfoTextMarginRight = 20; | |
71 | const int AnalogSignal::InfoTextMarginBottom = 5; | |
72 | ||
73 | AnalogSignal::AnalogSignal( | |
74 | pv::Session &session, | |
75 | shared_ptr<data::SignalBase> base) : | |
76 | Signal(session, base), | |
77 | scale_index_(4), // 20 per div | |
78 | scale_index_drag_offset_(0), | |
79 | div_height_(3 * QFontMetrics(QApplication::font()).height()), | |
80 | vdivs_(1), | |
81 | resolution_(0) | |
82 | { | |
83 | base_->set_colour(SignalColours[base_->index() % countof(SignalColours)]); | |
84 | update_scale(); | |
85 | } | |
86 | ||
87 | shared_ptr<pv::data::SignalData> AnalogSignal::data() const | |
88 | { | |
89 | return base_->analog_data(); | |
90 | } | |
91 | ||
92 | void AnalogSignal::save_settings(QSettings &settings) const | |
93 | { | |
94 | settings.setValue("vdivs", vdivs_); | |
95 | settings.setValue("scale_index", scale_index_); | |
96 | } | |
97 | ||
98 | void AnalogSignal::restore_settings(QSettings &settings) | |
99 | { | |
100 | if (settings.contains("vdivs")) | |
101 | vdivs_ = settings.value("vdivs").toInt(); | |
102 | ||
103 | if (settings.contains("scale_index")) { | |
104 | scale_index_ = settings.value("scale_index").toInt(); | |
105 | update_scale(); | |
106 | } | |
107 | } | |
108 | ||
109 | std::pair<int, int> AnalogSignal::v_extents() const | |
110 | { | |
111 | const int h = vdivs_ * div_height_; | |
112 | return make_pair(-h, h); | |
113 | } | |
114 | ||
115 | int AnalogSignal::scale_handle_offset() const | |
116 | { | |
117 | const int h = vdivs_ * div_height_; | |
118 | ||
119 | return ((scale_index_drag_offset_ - scale_index_) * | |
120 | h / 4) - h / 2; | |
121 | } | |
122 | ||
123 | void AnalogSignal::scale_handle_dragged(int offset) | |
124 | { | |
125 | const int h = vdivs_ * div_height_; | |
126 | ||
127 | scale_index_ = scale_index_drag_offset_ - | |
128 | (offset + h / 2) / (h / 4); | |
129 | ||
130 | update_scale(); | |
131 | } | |
132 | ||
133 | void AnalogSignal::scale_handle_drag_release() | |
134 | { | |
135 | scale_index_drag_offset_ = scale_index_; | |
136 | update_scale(); | |
137 | } | |
138 | ||
139 | void AnalogSignal::paint_back(QPainter &p, const ViewItemPaintParams &pp) | |
140 | { | |
141 | if (base_->enabled()) { | |
142 | Trace::paint_back(p, pp); | |
143 | paint_axis(p, pp, get_visual_y()); | |
144 | } | |
145 | } | |
146 | ||
147 | void AnalogSignal::paint_mid(QPainter &p, const ViewItemPaintParams &pp) | |
148 | { | |
149 | assert(base_->analog_data()); | |
150 | assert(owner_); | |
151 | ||
152 | const int y = get_visual_y(); | |
153 | ||
154 | if (!base_->enabled()) | |
155 | return; | |
156 | ||
157 | paint_grid(p, y, pp.left(), pp.right()); | |
158 | ||
159 | const deque< shared_ptr<pv::data::AnalogSegment> > &segments = | |
160 | base_->analog_data()->analog_segments(); | |
161 | if (segments.empty()) | |
162 | return; | |
163 | ||
164 | const shared_ptr<pv::data::AnalogSegment> &segment = | |
165 | segments.front(); | |
166 | ||
167 | const double pixels_offset = pp.pixels_offset(); | |
168 | const double samplerate = max(1.0, segment->samplerate()); | |
169 | const pv::util::Timestamp& start_time = segment->start_time(); | |
170 | const int64_t last_sample = segment->get_sample_count() - 1; | |
171 | const double samples_per_pixel = samplerate * pp.scale(); | |
172 | const pv::util::Timestamp start = samplerate * (pp.offset() - start_time); | |
173 | const pv::util::Timestamp end = start + samples_per_pixel * pp.width(); | |
174 | ||
175 | const int64_t start_sample = min(max(floor(start).convert_to<int64_t>(), | |
176 | (int64_t)0), last_sample); | |
177 | const int64_t end_sample = min(max((ceil(end) + 1).convert_to<int64_t>(), | |
178 | (int64_t)0), last_sample); | |
179 | ||
180 | if (samples_per_pixel < EnvelopeThreshold) | |
181 | paint_trace(p, segment, y, pp.left(), | |
182 | start_sample, end_sample, | |
183 | pixels_offset, samples_per_pixel); | |
184 | else | |
185 | paint_envelope(p, segment, y, pp.left(), | |
186 | start_sample, end_sample, | |
187 | pixels_offset, samples_per_pixel); | |
188 | } | |
189 | ||
190 | void AnalogSignal::paint_fore(QPainter &p, const ViewItemPaintParams &pp) | |
191 | { | |
192 | if (!enabled()) | |
193 | return; | |
194 | ||
195 | const int y = get_visual_y(); | |
196 | ||
197 | // Show the info section on the right side of the trace | |
198 | const QString infotext = QString("%1 V/div").arg(resolution_); | |
199 | ||
200 | p.setPen(base_->colour()); | |
201 | p.setFont(QApplication::font()); | |
202 | ||
203 | const QRectF bounding_rect = QRectF(pp.left(), | |
204 | y + v_extents().first, | |
205 | pp.width() - InfoTextMarginRight, | |
206 | v_extents().second - v_extents().first - InfoTextMarginBottom); | |
207 | ||
208 | p.drawText(bounding_rect, Qt::AlignRight | Qt::AlignBottom, infotext); | |
209 | } | |
210 | ||
211 | void AnalogSignal::paint_grid(QPainter &p, int y, int left, int right) | |
212 | { | |
213 | p.setRenderHint(QPainter::Antialiasing, false); | |
214 | ||
215 | p.setPen(QPen(GridMajorColor, 1, Qt::DashLine)); | |
216 | for (int i = 1; i <= vdivs_; i++) { | |
217 | const float dy = i * div_height_; | |
218 | p.drawLine(QLineF(left, y - dy, right, y - dy)); | |
219 | p.drawLine(QLineF(left, y + dy, right, y + dy)); | |
220 | } | |
221 | ||
222 | p.setPen(QPen(GridMinorColor, 1, Qt::DashLine)); | |
223 | for (int i = 0; i < vdivs_; i++) { | |
224 | const float dy = i * div_height_; | |
225 | const float dy25 = dy + (0.25 * div_height_); | |
226 | const float dy50 = dy + (0.50 * div_height_); | |
227 | const float dy75 = dy + (0.75 * div_height_); | |
228 | p.drawLine(QLineF(left, y - dy25, right, y - dy25)); | |
229 | p.drawLine(QLineF(left, y + dy25, right, y + dy25)); | |
230 | p.drawLine(QLineF(left, y - dy50, right, y - dy50)); | |
231 | p.drawLine(QLineF(left, y + dy50, right, y + dy50)); | |
232 | p.drawLine(QLineF(left, y - dy75, right, y - dy75)); | |
233 | p.drawLine(QLineF(left, y + dy75, right, y + dy75)); | |
234 | } | |
235 | ||
236 | p.setRenderHint(QPainter::Antialiasing, true); | |
237 | } | |
238 | ||
239 | void AnalogSignal::paint_trace(QPainter &p, | |
240 | const shared_ptr<pv::data::AnalogSegment> &segment, | |
241 | int y, int left, const int64_t start, const int64_t end, | |
242 | const double pixels_offset, const double samples_per_pixel) | |
243 | { | |
244 | const int64_t sample_count = end - start; | |
245 | ||
246 | const float *const samples = segment->get_samples(start, end); | |
247 | assert(samples); | |
248 | ||
249 | p.setPen(base_->colour()); | |
250 | ||
251 | QPointF *points = new QPointF[sample_count]; | |
252 | QPointF *point = points; | |
253 | ||
254 | for (int64_t sample = start; sample != end; sample++) { | |
255 | const float x = (sample / samples_per_pixel - | |
256 | pixels_offset) + left; | |
257 | *point++ = QPointF(x, | |
258 | y - samples[sample - start] * scale_); | |
259 | } | |
260 | ||
261 | p.drawPolyline(points, point - points); | |
262 | ||
263 | delete[] samples; | |
264 | delete[] points; | |
265 | } | |
266 | ||
267 | void AnalogSignal::paint_envelope(QPainter &p, | |
268 | const shared_ptr<pv::data::AnalogSegment> &segment, | |
269 | int y, int left, const int64_t start, const int64_t end, | |
270 | const double pixels_offset, const double samples_per_pixel) | |
271 | { | |
272 | using pv::data::AnalogSegment; | |
273 | ||
274 | AnalogSegment::EnvelopeSection e; | |
275 | segment->get_envelope_section(e, start, end, samples_per_pixel); | |
276 | ||
277 | if (e.length < 2) | |
278 | return; | |
279 | ||
280 | p.setPen(QPen(Qt::NoPen)); | |
281 | p.setBrush(base_->colour()); | |
282 | ||
283 | QRectF *const rects = new QRectF[e.length]; | |
284 | QRectF *rect = rects; | |
285 | ||
286 | for (uint64_t sample = 0; sample < e.length-1; sample++) { | |
287 | const float x = ((e.scale * sample + e.start) / | |
288 | samples_per_pixel - pixels_offset) + left; | |
289 | const AnalogSegment::EnvelopeSample *const s = | |
290 | e.samples + sample; | |
291 | ||
292 | // We overlap this sample with the next so that vertical | |
293 | // gaps do not appear during steep rising or falling edges | |
294 | const float b = y - max(s->max, (s+1)->min) * scale_; | |
295 | const float t = y - min(s->min, (s+1)->max) * scale_; | |
296 | ||
297 | float h = b - t; | |
298 | if (h >= 0.0f && h <= 1.0f) | |
299 | h = 1.0f; | |
300 | if (h <= 0.0f && h >= -1.0f) | |
301 | h = -1.0f; | |
302 | ||
303 | *rect++ = QRectF(x, t, 1.0f, h); | |
304 | } | |
305 | ||
306 | p.drawRects(rects, e.length); | |
307 | ||
308 | delete[] rects; | |
309 | delete[] e.samples; | |
310 | } | |
311 | ||
312 | float AnalogSignal::get_resolution(int scale_index) | |
313 | { | |
314 | const float seq[] = {1.0f, 2.0f, 5.0f}; | |
315 | ||
316 | const int offset = std::numeric_limits<int>::max() / (2 * countof(seq)); | |
317 | const std::div_t d = std::div( | |
318 | (int)(scale_index + countof(seq) * offset), | |
319 | countof(seq)); | |
320 | ||
321 | return powf(10.0f, d.quot - offset) * seq[d.rem]; | |
322 | } | |
323 | ||
324 | void AnalogSignal::update_scale() | |
325 | { | |
326 | resolution_ = get_resolution(scale_index_); | |
327 | scale_ = div_height_ / resolution_; | |
328 | } | |
329 | ||
330 | void AnalogSignal::populate_popup_form(QWidget *parent, QFormLayout *form) | |
331 | { | |
332 | // Add the standard options | |
333 | Signal::populate_popup_form(parent, form); | |
334 | ||
335 | QFormLayout *const layout = new QFormLayout; | |
336 | ||
337 | // Add the number of vdivs | |
338 | QSpinBox *vdiv_sb = new QSpinBox(parent); | |
339 | vdiv_sb->setRange(1, MaximumVDivs); | |
340 | vdiv_sb->setValue(vdivs_); | |
341 | connect(vdiv_sb, SIGNAL(valueChanged(int)), | |
342 | this, SLOT(on_vdivs_changed(int))); | |
343 | layout->addRow(tr("Number of vertical divs"), vdiv_sb); | |
344 | ||
345 | // Add the vertical resolution | |
346 | resolution_cb_ = new QComboBox(parent); | |
347 | ||
348 | for (int i = MinScaleIndex; i < MaxScaleIndex; i++) { | |
349 | const QString label = QString("%1").arg(get_resolution(i)); | |
350 | resolution_cb_->insertItem(0, label, QVariant(i)); | |
351 | } | |
352 | ||
353 | const int cur_idx = resolution_cb_->findData(QVariant(scale_index_)); | |
354 | resolution_cb_->setCurrentIndex(cur_idx); | |
355 | ||
356 | connect(resolution_cb_, SIGNAL(currentIndexChanged(int)), | |
357 | this, SLOT(on_resolution_changed(int))); | |
358 | ||
359 | QGridLayout *const vdiv_layout = new QGridLayout; | |
360 | QLabel *const vdiv_unit = new QLabel(tr("V/div")); | |
361 | vdiv_layout->addWidget(resolution_cb_, 0, 0); | |
362 | vdiv_layout->addWidget(vdiv_unit, 0, 1); | |
363 | ||
364 | layout->addRow(tr("Vertical resolution"), vdiv_layout); | |
365 | ||
366 | form->addRow(layout); | |
367 | } | |
368 | ||
369 | void AnalogSignal::on_vdivs_changed(int vdivs) | |
370 | { | |
371 | vdivs_ = vdivs; | |
372 | ||
373 | if (owner_) { | |
374 | // Call order is important, otherwise the lazy event handler won't work | |
375 | owner_->extents_changed(false, true); | |
376 | owner_->row_item_appearance_changed(false, true); | |
377 | } | |
378 | } | |
379 | ||
380 | void AnalogSignal::on_resolution_changed(int index) | |
381 | { | |
382 | scale_index_ = resolution_cb_->itemData(index).toInt(); | |
383 | update_scale(); | |
384 | ||
385 | if (owner_) | |
386 | owner_->row_item_appearance_changed(false, true); | |
387 | } | |
388 | ||
389 | } // namespace TraceView | |
390 | } // namespace views | |
391 | } // namespace pv |