Quick: Add experimental.viewport.devicePixelRatio

This specifies a devicePixelRatio to be used by web content instead of
the QScreen::devicePixelRatio(). This is necessary on non-iOS mobile
devices to remain compatible with the mobile web which assumes
devicePixelRatio is computed as the ratio of actual dpi to 160 dpi.
Non-iOS mobile platforms may use different criteria to determine the
QScreen::devicePixelRatio(), depending on the history of the platform,
or simply leave it at 1.0.

For QNX, this setting gets a reasonable default value so developers
don't have to regularly use this experimental API.

These changes were inspired by the Android Chromium port which uses a
GetDpiScale() to accomplish the same in
content/browser/android/content_view_core_impl.cc.

Change-Id: I1bc8878a47dabcdb6986c4fe5c8c4ac230ae2514
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/webengine/plugin/experimental/plugin.cpp b/src/webengine/plugin/experimental/plugin.cpp
index 08d482508..6107147cf 100644
--- a/src/webengine/plugin/experimental/plugin.cpp
+++ b/src/webengine/plugin/experimental/plugin.cpp
@@ -69,6 +69,8 @@ public:
         qmlRegisterExtendedType<QQuickWebEngineView, QQuickWebEngineViewExperimentalExtension>(uri, 1, 0, "WebEngineView");
         qmlRegisterUncreatableType<QQuickWebEngineViewExperimental>(uri, 1, 0, "WebEngineViewExperimental",
             QObject::tr("Cannot create a separate instance of WebEngineViewExperimental"));
+        qmlRegisterUncreatableType<QQuickWebEngineViewport>(uri, 1, 0, "WebEngineViewport",
+            QObject::tr("Cannot create a separate instance of WebEngineViewport"));
     }
 };