[systemsettings] [Bug 336089] Font preview - rendering problem

[Thomas Lübking via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=336089

--- Comment #42 from Thomas Lübking <thomas.luebking at gmail.com> ---
Yes, is. Stunning.

The xft image is RGB32 here, may depend on whether it's set to translucent
(though there ARGB32 instead of pre-multiplied is used)

We need this patch tested on all possible GPUs (notably intel/sna!)

diff --git a/kcms/kfontinst/lib/FcEngine.cpp b/kcms/kfontinst/lib/FcEngine.cpp
index 19b7206..6c731dc 100644
--- a/kcms/kfontinst/lib/FcEngine.cpp
+++ b/kcms/kfontinst/lib/FcEngine.cpp
@@ -537,7 +537,7 @@ QImage CFcEngine::Xft::toImage(int w, int h) const
     if (!xImage) {
         return QImage();
     }
-    return QImage(xImage->data, xImage->width, xImage->height, xImage->stride,
QImage::Format_ARGB32_Premultiplied, &cleanupXImage, xImage);
+    return QImage(xImage->data, xImage->width, xImage->height, xImage->stride,
QImage::Format_RGB32, &cleanupXImage, xImage);
 }

 inline int point2Pixel(int point)

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