QPA offscreen: make platform plugin configurable

Add ability to load a json config file containing screen
configuration at startup. The config file location
is specified using platform options:

    -platform offscfreen:configfile=/path/to/file

Config file format example:
{
    “screens”: [
        {
        "name", "screen-1",
        "x", 0,
        "y", 0,
        "width", 640,
        "height", 480,
        "dpi", 96,
        "dpr", 1,
        },
        …
    ]
}

Change-Id: Iac21aaafa6d0f361bdd6f6e9168b7e68db6ae011
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 1 insertions, 2 deletions

diff --git a/src/plugins/platforms/offscreen/main.cpp b/src/plugins/platforms/offscreen/main.cpp
index f364d9f004..6b696ed073 100644
--- a/src/plugins/platforms/offscreen/main.cpp
+++ b/src/plugins/platforms/offscreen/main.cpp
@@ -53,9 +53,8 @@ public:
 
 QPlatformIntegration *QOffscreenIntegrationPlugin::create(const QString& system, const QStringList& paramList)
 {
-    Q_UNUSED(paramList);
     if (!system.compare(QLatin1String("offscreen"), Qt::CaseInsensitive))
-        return QOffscreenIntegration::createOffscreenIntegration();
+        return QOffscreenIntegration::createOffscreenIntegration(paramList);
 
     return nullptr;
 }