From b7aeb147f24ae6c5d98d2a2663cfadcb2169ca6f Mon Sep 17 00:00:00 2001 From: Robin Gareus Date: Thu, 18 Apr 2013 10:25:09 +0200 Subject: [PATCH] display waveform polarity correctly * cairo's Y axis points downward -> invert phase display * fix logarithmic view for value.max < 0 --- libs/canvas/wave_view.cc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libs/canvas/wave_view.cc b/libs/canvas/wave_view.cc index 71f993a579..257901946f 100644 --- a/libs/canvas/wave_view.cc +++ b/libs/canvas/wave_view.cc @@ -444,7 +444,7 @@ WaveView::CacheEntry::image () if (y > 0.0) { context->line_to (i + 0.5, position (alt_log_meter (fast_coefficient_to_dB (y)))); } else if (y < 0.0) { - context->line_to (i + 0.5, position (alt_log_meter (fast_coefficient_to_dB (-y)))); + context->line_to (i + 0.5, position (-alt_log_meter (fast_coefficient_to_dB (-y)))); } else { context->line_to (i + 0.5, position (0.0)); } @@ -559,7 +559,7 @@ WaveView::CacheEntry::position (double s) const default: break; } - return (s+1.0) * (_wave_view->_height / 2.0); + return (1.0-s) * (_wave_view->_height / 2.0); } void