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https://bugzilla.mozilla.org/show_bug.cgi?id=1504834#c10
https://bug1504834.bmoattachments.org/attachment.cgi?id=9111147
mozilla-bmo1504834-part4.patch
# HG changeset patch
# Parent 46ea866ca3acb8bb5e1709ceb799b9c94f591dec
Problem description: Tab-titles that are too long to fit into a tab get faded out.
On big endian this is broken and instead of fading out, the
tab gets white and the font transparent, leading to an unreadable
tab-title
Solution: This is not a real solution, but a hack. The real solution would have been
to byte-swap the correct buffer, but I could not find it.
So the next best thing is to deactivate the fading-effect. Now all tab-titles
are readable, albeit not as pretty to look at as they could be.
Side-effects: I have not yet found an unwanted side-effect.
diff --git gfx/2d/DrawTargetSkia.cpp gfx/2d/DrawTargetSkia.cpp
index 6bbef8d..161b96f 100644
--- gfx/2d/DrawTargetSkia.cpp
+++ gfx/2d/DrawTargetSkia.cpp
@@ -1903,6 +1903,14 @@ void DrawTargetSkia::PushLayerWithBlend(bool aOpaque, Float aOpacity,
SkCanvas::kPreserveLCDText_SaveLayerFlag |
(aCopyBackground ? SkCanvas::kInitWithPrevious_SaveLayerFlag : 0));
+#if MOZ_BIG_ENDIAN()
+ // Pushing a layer where an aMask is defined produces wrong output.
+ // We _should_ endian swap the data, but I couldn't find a workable way to do so
+ // Therefore I deactivate those layers in the meantime.
+ // The result is: Tab-titles that are longer than the available space should be faded out.
+ // The fading doesn't work, so we deactivate the fading-effect here.
+ if (!aMask)
+#endif
mCanvas->saveLayer(saveRec);
SetPermitSubpixelAA(aOpaque);
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