+ draw_range(a, p, fill, outline, h, start, end, y);
+}
+
+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;
+
+ 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 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)
+ };
+
+ 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)
+ bool single_format = true;
+ int format = annotations.front().format();
+
+ for (const Annotation &a : annotations)
+ if (a.format() != format) {
+ single_format = false;
+ break;
+ }
+
+ p.setPen((single_format ? OutlineColours[colour] : Qt::gray));
+ p.setBrush(QBrush((single_format ? Colours[colour] : Qt::gray),
+ Qt::Dense4Pattern));
+
+ p.drawConvexPolygon(pts, countof(pts));