+
+void LogicSignal::paint(QPainter &p, const QRect &rect, double scale,
+ double offset)
+{
+ QLineF *line;
+
+ vector< pair<int64_t, bool> > edges;
+
+ assert(scale > 0);
+ assert(_data);
+
+ const float high_offset = rect.top() + Margin;
+ const float low_offset = rect.bottom() - Margin;
+
+ const deque< shared_ptr<LogicDataSnapshot> > &snapshots =
+ _data->get_snapshots();
+ if(snapshots.empty())
+ return;
+
+ const shared_ptr<LogicDataSnapshot> &snapshot = snapshots.front();
+
+ const double pixels_offset = offset / scale;
+ const double samplerate = _data->get_samplerate();
+ const double start_time = _data->get_start_time();
+ const int64_t last_sample = snapshot->get_sample_count() - 1;
+ const double samples_per_pixel = samplerate * scale;
+ const double start = samplerate * (offset - start_time);
+ const double end = start + samples_per_pixel * rect.width();
+
+ snapshot->get_subsampled_edges(edges,
+ min(max((int64_t)floor(start), (int64_t)0), last_sample),
+ min(max((int64_t)ceil(end), (int64_t)0), last_sample),
+ samples_per_pixel / Oversampling, _probe_index);
+ assert(edges.size() >= 2);
+
+ // Paint the edges
+ const unsigned int edge_count = edges.size() - 2;
+ QLineF *const edge_lines = new QLineF[edge_count];
+ line = edge_lines;
+
+ for(vector<LogicDataSnapshot::EdgePair>::const_iterator i =
+ edges.begin() + 1;
+ i != edges.end() - 1; i++) {
+ const int x = (int)((*i).first / samples_per_pixel -
+ pixels_offset) + rect.left();
+ *line++ = QLineF(x, high_offset, x, low_offset);
+ }
+
+ p.setPen(EdgeColour);
+ p.drawLines(edge_lines, edge_count);
+ delete[] edge_lines;
+
+ // Paint the caps
+ const unsigned int max_cap_line_count = (edges.size() - 1);
+ QLineF *const cap_lines = new QLineF[max_cap_line_count];
+
+ p.setPen(HighColour);
+ paint_caps(p, cap_lines, edges, true, samples_per_pixel,
+ pixels_offset, rect.left(), high_offset);
+ p.setPen(LowColour);
+ paint_caps(p, cap_lines, edges, false, samples_per_pixel,
+ pixels_offset, rect.left(), low_offset);
+
+ delete[] cap_lines;
+}
+
+int LogicSignal::paint_caps(QPainter &p, QLineF *const lines,
+ vector< pair<int64_t, bool> > &edges, bool level,
+ double samples_per_pixel, double pixels_offset, int x_offset,
+ int y_offset)
+{
+ QLineF *line = lines;
+
+ for(vector<LogicDataSnapshot::EdgePair>::const_iterator i = edges.begin();
+ i != (edges.end() - 1); i++)
+ if((*i).second == level) {
+ *line++ = QLineF(
+ (int)((*i).first / samples_per_pixel -
+ pixels_offset) + x_offset, y_offset,
+ (int)((*(i+1)).first / samples_per_pixel -
+ pixels_offset) + x_offset, y_offset);
+ }
+
+ p.drawLines(lines, line - lines);
+}
+
+QColor LogicSignal::get_colour() const
+{
+ return LogicSignalColours[_probe_index % countof(LogicSignalColours)];
+}
+
+int LogicSignal::get_nominal_offset(const QRect &rect) const
+{
+ return rect.bottom() - Margin;
+}