From 2ca57c9c59c61da2facac2d439a9dbf64f5f61a9 Mon Sep 17 00:00:00 2001
From: Mirco Miranda <mirco.miranda@systemceramics.com>
Date: Wed, 10 May 2023 15:34:14 +0200
Subject: [PATCH] Avoid unnecessary conversions

(cherry picked from commit edd6adcbac2e3ffb385e6a7b15d68d6dee7c1d86)
---
 src/imageformats/rgb.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/imageformats/rgb.cpp b/src/imageformats/rgb.cpp
index 7f758dd..cb54072 100644
--- a/src/imageformats/rgb.cpp
+++ b/src/imageformats/rgb.cpp
@@ -672,12 +672,15 @@ bool SGIImage::writeImage(const QImage &image)
         _dim = 3, _zsize = 3;
     }
 
-    if (img.hasAlphaChannel()) {
+    auto hasAlpha = img.hasAlphaChannel();
+    if (hasAlpha) {
         _dim = 3, _zsize++;
     }
 
-    if (img.format() != QImage::Format_ARGB32) {
+    if (hasAlpha && img.format() != QImage::Format_ARGB32) {
         img = img.convertToFormat(QImage::Format_ARGB32);
+    } else if (!hasAlpha && img.format() != QImage::Format_RGB32) {
+        img = img.convertToFormat(QImage::Format_RGB32);
     }
     if (img.isNull()) {
         //         qDebug() << "can't convert image to depth 32";