Add an interface to scalable rendering with multiple resolution

To support rendering which fits screen resolution,
new class AGLScreenInfo is introduced to get 'scale_factor'
from AGL HMI framework.

If AGL HMI framework doesn't support multi-resolution,
scale is set 1.0 for backward compatibility.

Bug-AGL: SPEC-1611

Change-Id: I565f9b29b7b2953b5908901faa36c7339d9e7755
Signed-off-by: Tadao Tanikawa <tanikawa.tadao@jp.panasonic.com>

6 files changed, 38 insertions, 1 deletions

diff --git a/src/aglextras/hmi/aglapplication.cpp b/src/aglextras/hmi/aglapplication.cpp
index 82e49bf..320aa17 100644
--- a/src/aglextras/hmi/aglapplication.cpp
+++ b/src/aglextras/hmi/aglapplication.cpp
@@ -31,7 +31,6 @@ QT_BEGIN_NAMESPACE
 AGLApplicationPrivate::AGLApplicationPrivate (AGLApplication *app)
         : binding_address(new QUrl)
         , engine(new QQmlApplicationEngine(app))
-
 {
     ;
 }
@@ -108,6 +107,9 @@ AGLApplication::exec (void)
 void AGLApplication::setupApplicationRole (const QString &role)
 {
     d_ptr->wmclient = new AGLWmClient(role, d_ptr->port, d_ptr->secret);
+    d_ptr->screen_info = new AGLScreenInfo(this, d_ptr->wmclient->get_scale_factor());
+    d_ptr->engine->rootContext()->setContextProperty(QStringLiteral("screenInfo"),
+                                                     d_ptr->screen_info);
 }
 
 QT_END_NAMESPACE
diff --git a/src/aglextras/hmi/aglapplication.h b/src/aglextras/hmi/aglapplication.h
index df68979..f9d17a0 100644
--- a/src/aglextras/hmi/aglapplication.h
+++ b/src/aglextras/hmi/aglapplication.h
@@ -43,6 +43,19 @@ private:
     friend class AGLApplicationPrivate;
     QSharedPointer<AGLApplicationPrivate> d_ptr;
 };
+
+class AGLScreenInfo : public QObject
+{
+    Q_OBJECT
+
+public:
+    AGLScreenInfo(QObject* parent = 0, double scale = 1.0) : QObject(parent), _scale_factor(scale) {};
+
+    Q_INVOKABLE double scale_factor() const { return _scale_factor; };
+
+private:
+    double _scale_factor;
+};
 QT_END_NAMESPACE
 
 #endif // AGLAPPLICATION_H
diff --git a/src/aglextras/hmi/aglapplication_p.h b/src/aglextras/hmi/aglapplication_p.h
index 93e5976..6cc1880 100644
--- a/src/aglextras/hmi/aglapplication_p.h
+++ b/src/aglextras/hmi/aglapplication_p.h
@@ -23,6 +23,7 @@ class QUrl;
 class QQmlApplicationEngine;
 class AGLWmClient;
 class AGLApplication;
+class AGLScreenInfo;
 class AGLApplicationPrivate
 {
   public:
@@ -35,6 +36,7 @@ class AGLApplicationPrivate
     QUrl*   binding_address;
     QQmlApplicationEngine *engine;
     AGLWmClient* wmclient;
+    AGLScreenInfo* screen_info;
     friend class AGLApplication;
 };
 QT_END_NAMESPACE
diff --git a/src/aglextras/hmi/aglwmclient.cpp b/src/aglextras/hmi/aglwmclient.cpp
index cb80e17..3baf6c7 100644
--- a/src/aglextras/hmi/aglwmclient.cpp
+++ b/src/aglextras/hmi/aglwmclient.cpp
@@ -63,6 +63,11 @@ void AGLWmClient::disconnect_frame_swapped (void)
 #endif  // USE_AGL_HMI_LOWLEVEL_API
 }
 
+double AGLWmClient::get_scale_factor (void)
+{
+    return d_ptr->scale_factor;
+}
+
 #ifdef USE_AGL_HMI_LOWLEVEL_API
 void AGLWmClient::attach (QQmlApplicationEngine* engine)
 {
@@ -104,6 +109,19 @@ AGLWmClient::AGLWmClient (const QString&, int port, QString)
         return;
     }
 
+    // Get information of screen
+    {
+        json_object *obj = json_object_new_object();
+        int ret = w_ptr->getDisplayInfo(obj);
+        if (!ret) {
+            json_object *j_val;
+            if (json_object_object_get_ex(obj, "scale", &j_val)) {
+                d_ptr->scale_factor = json_object_get_double(j_val);
+            }
+        }
+        json_object_put(obj);
+    }
+
     d_ptr->binding = true;
     d_ptr->layout = layout;
 
diff --git a/src/aglextras/hmi/aglwmclient.h b/src/aglextras/hmi/aglwmclient.h
index 4603610..d6132aa 100644
--- a/src/aglextras/hmi/aglwmclient.h
+++ b/src/aglextras/hmi/aglwmclient.h
@@ -33,6 +33,7 @@ class AGLEXTRAS_EXPORT AGLWmClient : public QObject
 public:
     AGLWmClient (const QString& layout, int port, QString secret);
     void attach (QQmlApplicationEngine* engine);
+    double get_scale_factor (void);
 
 private slots:
     void disconnect_frame_swapped (void);
diff --git a/src/aglextras/hmi/aglwmclient_p.h b/src/aglextras/hmi/aglwmclient_p.h
index 239a4ae..ff5cd1f 100644
--- a/src/aglextras/hmi/aglwmclient_p.h
+++ b/src/aglextras/hmi/aglwmclient_p.h
@@ -29,6 +29,7 @@ class AGLWmClientPrivate
     QString layout;  // id of layaout which is managed by AGL WM
     QMetaObject::Connection loading;
     bool binding = false;
+    double scale_factor = 1.0;
     friend class AGLWmClient;
 };
 QT_END_NAMESPACE