+void DecodeTrace::draw_annotations(vector<pv::data::decode::Annotation> annotations,
+ QPainter &p, int h, const ViewItemPaintParams &pp, int y,
+ size_t base_colour, int row_title_width)
+{
+ using namespace pv::data::decode;
+
+ vector<Annotation> a_block;
+ int p_end = INT_MIN;
+
+ double samples_per_pixel, pixels_offset;
+ tie(pixels_offset, samples_per_pixel) =
+ get_pixels_offset_samples_per_pixel();
+
+ // Sort the annotations by start sample so that decoders
+ // can't confuse us by creating annotations out of order
+ stable_sort(annotations.begin(), annotations.end(),
+ [](const Annotation &a, const Annotation &b) {
+ return a.start_sample() < b.start_sample(); });
+
+ // Gather all annotations that form a visual "block" and draw them as such
+ for (const Annotation &a : annotations) {
+
+ const int a_start = a.start_sample() / samples_per_pixel - pixels_offset;
+ const int a_end = a.end_sample() / samples_per_pixel - pixels_offset;
+ const int a_width = a_end - a_start;
+
+ const int delta = a_end - p_end;
+
+ bool a_is_separate = false;
+
+ // Annotation wider than the threshold for a useful label width?
+ if (a_width >= min_useful_label_width_) {
+ for (const QString &ann_text : a.annotations()) {
+ const int w = p.boundingRect(QRectF(), 0, ann_text).width();
+ // Annotation wide enough to fit a label? Don't put it in a block then
+ if (w <= a_width) {
+ a_is_separate = true;
+ break;
+ }
+ }
+ }
+
+ // Were the previous and this annotation more than a pixel apart?
+ if ((abs(delta) > 1) || a_is_separate) {
+ // Block was broken, draw annotations that form the current block
+ if (a_block.size() == 1) {
+ draw_annotation(a_block.front(), p, h, pp, y, base_colour,
+ row_title_width);
+ }
+ else
+ draw_annotation_block(a_block, p, h, y, base_colour);
+
+ a_block.clear();
+ }
+
+ if (a_is_separate) {
+ draw_annotation(a, p, h, pp, y, base_colour, row_title_width);
+ // Next annotation must start a new block. delta will be > 1
+ // because we set p_end to INT_MIN but that's okay since
+ // a_block will be empty, so nothing will be drawn
+ p_end = INT_MIN;
+ } else {
+ a_block.push_back(a);
+ p_end = a_end;
+ }
+ }
+
+ if (a_block.size() == 1)
+ draw_annotation(a_block.front(), p, h, pp, y, base_colour,
+ row_title_width);
+ else
+ draw_annotation_block(a_block, p, h, y, base_colour);
+}
+
+void DecodeTrace::draw_annotation(const pv::data::decode::Annotation &a,
+ QPainter &p, int h, const ViewItemPaintParams &pp, int y,
+ size_t base_colour, int row_title_width) const
+{
+ double samples_per_pixel, pixels_offset;
+ tie(pixels_offset, samples_per_pixel) =
+ get_pixels_offset_samples_per_pixel();
+
+ const double start = a.start_sample() / samples_per_pixel -
+ pixels_offset;
+ const double end = a.end_sample() / samples_per_pixel -
+ pixels_offset;
+
+ const size_t colour = (base_colour + a.format()) % countof(Colours);
+ p.setPen(OutlineColours[colour]);
+ p.setBrush(Colours[colour]);
+
+ if (start > pp.right() + DrawPadding || end < pp.left() - DrawPadding)
+ return;
+
+ if (a.start_sample() == a.end_sample())
+ draw_instant(a, p, h, start, y);
+ else
+ draw_range(a, p, h, start, end, y, pp,
+ row_title_width);
+}
+
+void DecodeTrace::draw_annotation_block(
+ vector<pv::data::decode::Annotation> annotations, QPainter &p, int h,
+ int y, size_t base_colour) const
+{
+ using namespace pv::data::decode;
+
+ if (annotations.empty())
+ return;
+
+ double samples_per_pixel, pixels_offset;
+ tie(pixels_offset, samples_per_pixel) =
+ get_pixels_offset_samples_per_pixel();
+
+ const double start = annotations.front().start_sample() /
+ samples_per_pixel - pixels_offset;
+ const double end = annotations.back().end_sample() /
+ samples_per_pixel - pixels_offset;
+
+ const double top = y + .5 - h / 2;
+ const double bottom = y + .5 + h / 2;
+
+ const size_t colour = (base_colour + annotations.front().format()) %
+ countof(Colours);
+
+ // Check if all annotations are of the same type (i.e. we can use one color)
+ // or if we should use a neutral color (i.e. gray)
+ const int format = annotations.front().format();
+ const bool single_format = std::all_of(
+ annotations.begin(), annotations.end(),
+ [&](const Annotation &a) { return a.format() == format; });
+
+ p.setPen((single_format ? OutlineColours[colour] : Qt::gray));
+ p.setBrush(QBrush((single_format ? Colours[colour] : Qt::gray),
+ Qt::Dense4Pattern));
+ p.drawRoundedRect(
+ QRectF(start, top, end - start, bottom - top), h/4, h/4);
+}
+
+void DecodeTrace::draw_instant(const pv::data::decode::Annotation &a, QPainter &p,
+ int h, double x, int y) const
+{
+ const QString text = a.annotations().empty() ?
+ QString() : a.annotations().back();
+ const double w = min((double)p.boundingRect(QRectF(), 0, text).width(),
+ 0.0) + h;
+ const QRectF rect(x - w / 2, y - h / 2, w, h);
+
+ p.drawRoundedRect(rect, h / 2, h / 2);
+
+ p.setPen(Qt::black);
+ p.drawText(rect, Qt::AlignCenter | Qt::AlignVCenter, text);
+}
+
+void DecodeTrace::draw_range(const pv::data::decode::Annotation &a, QPainter &p,
+ int h, double start, double end, int y, const ViewItemPaintParams &pp,
+ int row_title_width) const
+{
+ const double top = y + .5 - h / 2;
+ const double bottom = y + .5 + h / 2;
+ const vector<QString> annotations = a.annotations();
+
+ // If the two ends are within 1 pixel, draw a vertical line
+ if (start + 1.0 > end) {
+ p.drawLine(QPointF(start, top), QPointF(start, bottom));
+ return;
+ }
+
+ const double cap_width = min((end - start) / 4, EndCapWidth);
+
+ QPointF pts[] = {
+ QPointF(start, y + .5f),
+ QPointF(start + cap_width, top),
+ QPointF(end - cap_width, top),
+ QPointF(end, y + .5f),
+ QPointF(end - cap_width, bottom),
+ QPointF(start + cap_width, bottom)
+ };
+
+ p.drawConvexPolygon(pts, countof(pts));
+
+ if (annotations.empty())
+ return;
+
+ const int ann_start = start + cap_width;
+ const int ann_end = end - cap_width;
+
+ const int real_start = std::max(ann_start, pp.left() + row_title_width);
+ const int real_end = std::min(ann_end, pp.right());
+ const int real_width = real_end - real_start;
+
+ QRectF rect(real_start, y - h / 2, real_width, h);
+ if (rect.width() <= 4)
+ return;
+
+ p.setPen(Qt::black);
+
+ // Try to find an annotation that will fit
+ QString best_annotation;
+ int best_width = 0;
+
+ for (const QString &a : annotations) {
+ const int w = p.boundingRect(QRectF(), 0, a).width();
+ if (w <= rect.width() && w > best_width)
+ best_annotation = a, best_width = w;
+ }
+
+ if (best_annotation.isEmpty())
+ best_annotation = annotations.back();
+
+ // If not ellide the last in the list
+ p.drawText(rect, Qt::AlignCenter, p.fontMetrics().elidedText(
+ best_annotation, Qt::ElideRight, rect.width()));
+}
+