From d462ece7c953c731c3e32d499a01b6ddb26eb93e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Poizl?= <nou.spiro@gmail.com>
Date: Mon, 13 Nov 2023 23:15:34 +0100
Subject: [PATCH] Improve histogram for 8 bit images

---
 histogram.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/histogram.cpp b/histogram.cpp
index c3ec0ff..a745700 100644
--- a/histogram.cpp
+++ b/histogram.cpp
@@ -40,7 +40,8 @@ void Histogram::paintEvent(QPaintEvent *)
                 uint64_t end =(i+1) * m_histogram.size() / w;
                 for(uint64_t o = start; o < end; o++)
                     sum += m_histogram[o];
-                m_points.push_back(sum);
+                if(start != end)
+                    m_points.push_back(sum);
             }
             float scale = *std::max_element(m_points.begin(), m_points.end());
             if(m_log)
@@ -57,7 +58,7 @@ void Histogram::paintEvent(QPaintEvent *)
         points.push_back(QPointF(0, h));
         for(size_t i = 0; i < m_points.size(); i++)
         {
-            points.push_back(QPointF(i, h - m_points[i] * h));
+            points.push_back(QPointF((float)i * w / m_points.size(), h - m_points[i] * h));
         }
         points.push_back(QPoint(w, h));
         painter.setBrush(Qt::gray);