Add COPYING file (PulseView is GPL, version 2 or later).

[pulseview.git] / logicsignal.cpp

diff --git a/logicsignal.cpp b/logicsignal.cpp
index 09a65afca5a32188186f9352f77e328ff00f979f..77ecb2e36416812bb958de8648718337d7f39f82 100644 (file)
--- a/logicsignal.cpp
+++ b/logicsignal.cpp
@@ -18,23 +18,137 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <math.h>
+
+#include "extdef.h"
+
+#include "logicdata.h"
+#include "logicdatasnapshot.h"
 #include "logicsignal.h"
 
-LogicSignal::LogicSignal(QString name, boost::shared_ptr<SignalData> data,
+using namespace boost;
+using namespace std;
+
+const float LogicSignal::Margin = 10.0f;
+const float LogicSignal::Oversampling = 2.0f;
+
+const QColor LogicSignal::EdgeColour(0x80, 0x80, 0x80);
+const QColor LogicSignal::HighColour(0x00, 0xC0, 0x00);
+const QColor LogicSignal::LowColour(0xC0, 0x00, 0x00);
+
+const QColor LogicSignal::LogicSignalColours[10] = {
+       QColor(0x16, 0x19, 0x1A),       // Black
+       QColor(0x8F, 0x52, 0x02),       // Brown
+       QColor(0xCC, 0x00, 0x00),       // Red
+       QColor(0xF5, 0x79, 0x00),       // Orange
+       QColor(0xED, 0xD4, 0x00),       // Yellow
+       QColor(0x73, 0xD2, 0x16),       // Green
+       QColor(0x34, 0x65, 0xA4),       // Blue
+       QColor(0x75, 0x50, 0x7B),       // Violet
+       QColor(0x88, 0x8A, 0x85),       // Grey
+       QColor(0xEE, 0xEE, 0xEC),       // White
+};
+
+LogicSignal::LogicSignal(QString name, shared_ptr<LogicData> data,
        int probe_index) :
-       Signal(name, data),
+       Signal(name),
+       _data(data),
        _probe_index(probe_index)
 {
        assert(_probe_index >= 0);
 }
 
-void LogicSignal::paint(QGLWidget &widget, const QRect &rect,
-       uint64_t scale, int64_t offset)
+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
 {
-       glColor3f(1,0,0);
-       glBegin(GL_POLYGON);
-       glVertex2f(rect.left(), rect.top());
-       glVertex2f(rect.right(), rect.top());
-       glVertex2f(rect.right(), rect.bottom());
-       glEnd();
+       return rect.bottom() - Margin;
 }