- const float min_level = 0.0f; // y=0 is top of screen, so “min” is the loudest level.
- const float max_level = -60.0f;
- int y = lrintf(height() * (level - min_level) / (max_level - min_level));
- if (y >= 0 && y < height()) {
- painter.setPen(Qt::white);
- painter.drawLine(0, y, width(), y);
+ int mid = width() / 2;
+
+ for (unsigned channel = 0; channel < 2; ++channel) {
+ int left = (channel == 0) ? 0 : mid;
+ int right = (channel == 0) ? mid : width();
+ float level_lu = level_lufs[channel] - ref_level_lufs;
+ int on_pos = lrint(lufs_to_pos(level_lu, height()));
+
+ if (flip) {
+ QRect on_rect(left, 0, right - left, height() - on_pos);
+ QRect off_rect(left, height() - on_pos, right - left, height());
+
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ } else {
+ QRect off_rect(left, 0, right - left, on_pos);
+ QRect on_rect(left, on_pos, right - left, height() - on_pos);
+
+ painter.drawPixmap(off_rect, off_pixmap, off_rect);
+ painter.drawPixmap(on_rect, on_pixmap, on_rect);
+ }
+
+ float peak_lu = peak_lufs[channel] - ref_level_lufs;
+ if (peak_lu >= min_level && peak_lu <= max_level) {
+ int peak_pos = lrint(lufs_to_pos(peak_lu, height()));
+ QRect peak_rect(left, peak_pos - 1, right, 2);
+ painter.drawPixmap(peak_rect, full_on_pixmap, peak_rect);
+ }