From: Soeren Apel Date: Sun, 14 Oct 2018 14:04:05 +0000 (+0200) Subject: Make "fill logic signal high areas" feature more robust X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=099d231771d9ff6230218dbe9835a03876f0e856;p=pulseview.git Make "fill logic signal high areas" feature more robust --- diff --git a/pv/views/trace/analogsignal.cpp b/pv/views/trace/analogsignal.cpp index be0abbf1..5b3241d2 100644 --- a/pv/views/trace/analogsignal.cpp +++ b/pv/views/trace/analogsignal.cpp @@ -588,25 +588,44 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp) // Check whether we need to fill the high areas const bool fill_high_areas = settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool(); - float high_start_x; vector high_rects; + float rising_edge_x; + bool rising_edge_seen = false; // Paint the edges const unsigned int edge_count = edges.size() - 2; QLineF *const edge_lines = new QLineF[edge_count]; line = edge_lines; + if (edges.front().second) { + // Beginning of trace is high + rising_edge_x = first_sample_x; + rising_edge_seen = true; + } + for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) { - const float x = ((*i).first / samples_per_pixel - - pixels_offset) + pp.left(); + // Note: multiple edges occupying a single pixel are represented by an edge + // with undefined logic level. This means that only the first falling edge + // after a rising edge corresponds to said rising edge - and vice versa. If + // more edges with the same logic level follow, they denote multiple edges. + + const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset); *line++ = QLineF(x, high_offset, x, low_offset); if (fill_high_areas) { - if ((*i).second) - high_start_x = x; - else - high_rects.emplace_back(high_start_x, high_offset, - x - high_start_x, signal_height); + // Any edge terminates a high area + const int width = x - rising_edge_x; + if (rising_edge_seen && (width > 0)) { + high_rects.emplace_back(rising_edge_x, high_offset, + width, signal_height); + rising_edge_seen = false; + } + + // Only rising edges start high areas + if ((*i).second) { + rising_edge_x = x; + rising_edge_seen = true; + } } if (show_sampling_points) @@ -631,10 +650,10 @@ void AnalogSignal::paint_logic_mid(QPainter &p, ViewItemPaintParams &pp) }; if (fill_high_areas) { - // Add last high rectangle if the signal is still high at the end of the view - if ((edges.cend() - 1)->second) - high_rects.emplace_back(high_start_x, high_offset, - last_sample_x - high_start_x, signal_height); + // Add last high rectangle if the signal is still high at the end of the trace + if (rising_edge_seen && (edges.cend() - 1)->second) + high_rects.emplace_back(rising_edge_x, high_offset, + last_sample_x - rising_edge_x, signal_height); const QColor fill_color = QColor::fromRgba(settings.value( GlobalSettings::Key_View_FillSignalHighAreaColor).value()); diff --git a/pv/views/trace/logicsignal.cpp b/pv/views/trace/logicsignal.cpp index 8d2e1384..f43ac37e 100644 --- a/pv/views/trace/logicsignal.cpp +++ b/pv/views/trace/logicsignal.cpp @@ -232,28 +232,44 @@ void LogicSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp) // Check whether we need to fill the high areas const bool fill_high_areas = settings.value(GlobalSettings::Key_View_FillSignalHighAreas).toBool(); - float high_start_x; vector high_rects; + float rising_edge_x; + bool rising_edge_seen = false; // Paint the edges const unsigned int edge_count = edges.size() - 2; QLineF *const edge_lines = new QLineF[edge_count]; line = edge_lines; - if (edges.front().second) - high_start_x = first_sample_x; // Beginning of signal is high + if (edges.front().second) { + // Beginning of trace is high + rising_edge_x = first_sample_x; + rising_edge_seen = true; + } for (auto i = edges.cbegin() + 1; i != edges.cend() - 1; i++) { - const float x = ((*i).first / samples_per_pixel - - pixels_offset) + pp.left(); + // Note: multiple edges occupying a single pixel are represented by an edge + // with undefined logic level. This means that only the first falling edge + // after a rising edge corresponds to said rising edge - and vice versa. If + // more edges with the same logic level follow, they denote multiple edges. + + const float x = pp.left() + ((*i).first / samples_per_pixel - pixels_offset); *line++ = QLineF(x, high_offset, x, low_offset); if (fill_high_areas) { - if ((*i).second) - high_start_x = x; - else - high_rects.emplace_back(high_start_x, high_offset, - x - high_start_x, signal_height_); + // Any edge terminates a high area + const int width = x - rising_edge_x; + if (rising_edge_seen && (width > 0)) { + high_rects.emplace_back(rising_edge_x, high_offset, + width, signal_height_); + rising_edge_seen = false; + } + + // Only rising edges start high areas + if ((*i).second) { + rising_edge_x = x; + rising_edge_seen = true; + } } if (show_sampling_points) @@ -278,10 +294,10 @@ void LogicSignal::paint_mid(QPainter &p, ViewItemPaintParams &pp) }; if (fill_high_areas) { - // Add last high rectangle if the signal is still high at the end of the view - if ((edges.cend() - 1)->second) - high_rects.emplace_back(high_start_x, high_offset, - last_sample_x - high_start_x, signal_height_); + // Add last high rectangle if the signal is still high at the end of the trace + if (rising_edge_seen && (edges.cend() - 1)->second) + high_rects.emplace_back(rising_edge_x, high_offset, + last_sample_x - rising_edge_x, signal_height_); const QColor fill_color = QColor::fromRgba(settings.value( GlobalSettings::Key_View_FillSignalHighAreaColor).value());