From d78986a978e248e8576d3b1d98e6a5e25dd9fded Mon Sep 17 00:00:00 2001
From: Mike Walters <mike@flomp.net>
Date: Fri, 4 Mar 2016 00:14:57 +0000
Subject: [PATCH] spectrogram: Fix inverted spectrogram

---
 spectrogramplot.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spectrogramplot.cpp b/spectrogramplot.cpp
index 95c2955..09d90b6 100644
--- a/spectrogramplot.cpp
+++ b/spectrogramplot.cpp
@@ -133,7 +133,7 @@ QPixmap* SpectrogramPlot::getPixmapTile(off_t tile)
             float normPower = (line[y] - powerMax) * -1.0f / powerRange;
             normPower = clamp(normPower, 0.0f, 1.0f);
 
-            image.setPixel(x, y, colormap[(uint8_t)(normPower * (256 - 1))]);
+            image.setPixel(x, fftSize - y - 1, colormap[(uint8_t)(normPower * (256 - 1))]);
         }
     }
     obj->convertFromImage(image);