- float level_lu = level_lufs + 23.0f;
- const float min_level = 18.0f; // y=0 is top of screen, so “min” is the loudest level.
- const float max_level = -36.0f;
- int y = lrintf(height() * (level_lu - min_level) / (max_level - min_level));
- if (y >= 0 && y < height()) {
- painter.setPen(Qt::white);
- painter.drawLine(0, y, width(), y);
+ float level_lu = level_lufs - ref_level_lufs;
+ int on_pos = lrint(lufs_to_pos(level_lu, height()));
+
+ if (flip) {
+ QRect on_rect(0, 0, width(), height() - on_pos);
+ QRect off_rect(0, height() - on_pos, width(), height());
+
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ } else {
+ QRect off_rect(0, 0, width(), on_pos);
+ QRect on_rect(0, on_pos, width(), height() - on_pos);
+
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);