diff --git a/effects/screenshot/screenshot.h b/effects/screenshot/screenshot.h
--- a/effects/screenshot/screenshot.h
+++ b/effects/screenshot/screenshot.h
@@ -54,7 +54,6 @@
     }
 
     static bool supported();
-    static void convertFromGLImage(QImage &img, int w, int h);
 public Q_SLOTS:
     Q_SCRIPTABLE void screenshotForWindow(qulonglong winid, int mask = 0);
     /**
diff --git a/effects/screenshot/screenshot.cpp b/effects/screenshot/screenshot.cpp
--- a/effects/screenshot/screenshot.cpp
+++ b/effects/screenshot/screenshot.cpp
@@ -302,10 +302,10 @@
                 effects->drawWindow(m_scheduledScreenshot, mask, infiniteRegion(), d);
 
                 // copy content from framebuffer into image
-                img = QImage(QSize(width, height), QImage::Format_ARGB32);
+                img = QImage(QSize(width, height), QImage::Format_RGBA8888);
                 glReadnPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, img.sizeInBytes(), (GLvoid*)img.bits());
+                img = img.mirrored();
                 GLRenderTarget::popRenderTarget();
-                ScreenShotEffect::convertFromGLImage(img, width, height);
             }
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
             xcb_image_t *xImage = nullptr;
@@ -721,19 +721,19 @@
             width = static_cast<int>(width * scale);
             height = static_cast<int>(height * scale);
 
-            img = QImage(width, height, QImage::Format_ARGB32);
+            img = QImage(width, height, QImage::Format_RGBA8888);
             GLTexture tex(GL_RGBA8, width, height);
             GLRenderTarget target(tex);
             target.blitFromFramebuffer(geometry);
             // copy content from framebuffer into image
             tex.bind();
             glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, static_cast<GLvoid*>(img.bits()));
             tex.unbind();
         } else {
-            img = QImage(width, height, QImage::Format_ARGB32);
+            img = QImage(width, height, QImage::Format_RGBA8888);
             glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
         }
-        ScreenShotEffect::convertFromGLImage(img, width, height);
+        img = img.mirrored();
     }
 
 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
@@ -763,37 +763,6 @@
     painter.drawImage(effects->cursorPos() - cursor.hotSpot() - QPoint(offsetx, offsety), cursor.image());
 }
 
-void ScreenShotEffect::convertFromGLImage(QImage &img, int w, int h)
-{
-    // from QtOpenGL/qgl.cpp
-    // Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
-    // see https://github.com/qt/qtbase/blob/dev/src/opengl/qgl.cpp
-    if (QSysInfo::ByteOrder == QSysInfo::BigEndian) {
-        // OpenGL gives RGBA; Qt wants ARGB
-        uint *p = reinterpret_cast<uint *>(img.bits());
-        uint *end = p + w * h;
-        while (p < end) {
-            uint a = *p << 24;
-            *p = (*p >> 8) | a;
-            p++;
-        }
-    } else {
-        // OpenGL gives ABGR (i.e. RGBA backwards); Qt wants ARGB
-        for (int y = 0; y < h; y++) {
-            uint *q = reinterpret_cast<uint *>(img.scanLine(y));
-            for (int x = 0; x < w; ++x) {
-                const uint pixel = *q;
-                *q = ((pixel << 16) & 0xff0000) | ((pixel >> 16) & 0xff)
-                     | (pixel & 0xff00ff00);
-
-                q++;
-            }
-        }
-
-    }
-    img = img.mirrored();
-}
-
 bool ScreenShotEffect::isActive() const
 {
     return (m_scheduledScreenshot != nullptr || !m_scheduledGeometry.isNull()) && !effects->isScreenLocked();