From 9be2a56ea885ab5d732badc7ef83fec712c1de3e Mon Sep 17 00:00:00 2001
From: Ivailo Monev <xakepa10@gmail.com>
Date: Sat, 18 Dec 2021 00:55:10 +0200
Subject: [PATCH] use memcmp() to compare QImage objects without color tables

Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
---
 src/gui/image/qimage.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp
index e69e8b1ca..21b1a13cb 100644
--- a/src/gui/image/qimage.cpp
+++ b/src/gui/image/qimage.cpp
@@ -3806,6 +3806,11 @@ bool QImage::operator==(const QImage & i) const
         return false;
     }
 
+    if (i.d->format == d->format && i.d->nbytes == d->nbytes
+        && d->format >= QImage::Format_RGB32 && d->format <= QImage::Format_RGB16) {
+        return (memcmp(constBits(), i.constBits(), d->nbytes) == 0);
+    }
+
     for (int h = 0; h < d->height; h++) {
         for (int w = 0; w < d->width; w++) {
             if (pixel(w, h) != i.pixel(w, h)) {