Enable scaling to fit various screen resolutions

Since the AGL HomeScreen of CES2018 assumes that the screen
resolution is 1080x1920px, the graphics of it partially
corrupted with others.

To fix this issue, now the AGL window manager automatically
scales size according to "scaling" value in setting.json

By default(even if "scaling" is not set), this scaling keeps
'fullscreen' aspect rate in area.db("aspect_fit")

User can select 3 options.
 - "aspect_fit" : Scale aspect rate of 'fullscreen' in area.db.(default)
 - "display_fit": Force to scale to display size.
 - "none" or others
                : Set size just as area.db

Bug-AGL: SPEC-1568
Bug-AGL: SPEC-1569

Change-Id: Ia08c0ebb2d71ae8f89a90088e181381c3ba3562d
Signed-off-by: Kazumasa Mitsunari <knimitz@witz-inc.co.jp>

1 files changed, 91 insertions, 0 deletions

diff --git a/src/wm_config.cpp b/src/wm_config.cpp
new file mode 100644
index 0000000..f91fedd
--- /dev/null
+++ b/src/wm_config.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "../include/hmi-debug.h"
+#include "json_helper.hpp"
+#include "wm_config.hpp"
+
+using std::string;
+
+namespace wm
+{
+
+WMConfig::WMConfig(){}
+
+WMConfig::~WMConfig()
+{
+    json_object_put(j_setting_conf);
+}
+
+WMError WMConfig::loadConfigs()
+{
+    WMError ret;
+    char const *pRoot = getenv("AFM_APP_INSTALL_DIR");
+    string root_path = pRoot;
+    if (root_path.length() == 0)
+    {
+        HMI_ERROR("wm", "AFM_APP_INSTALL_DIR is not defined");
+    }
+    ret = this->loadSetting(root_path);
+
+    return ret;
+}
+
+const string WMConfig::getConfigAspect()
+{
+    json_object *j;
+    string ret;
+    if (!json_object_object_get_ex(this->j_setting_conf, "settings", &j))
+    {
+        ret = "aspect_fit";
+    }
+    else
+    {
+        const char* scaling = jh::getStringFromJson(j, "scaling");
+        if(scaling == nullptr)
+        {
+            ret = "aspect_fit";
+        }
+        else
+        {
+            ret = scaling;
+        }
+    }
+    return ret;
+}
+
+/*
+ ***** Private Functions *****
+ */
+
+WMError WMConfig::loadSetting(const string &path)
+{
+    string setting_path = path;
+    int iret = -1;
+    WMError ret = SUCCESS;
+
+    if (setting_path.length() != 0)
+    {
+        setting_path = path + string("/etc/setting.json");
+        iret = jh::inputJsonFilie(setting_path.c_str(), &this->j_setting_conf);
+        if (iret < 0)
+            ret = FAIL;
+    }
+
+    return ret;
+}
+
+} // namespace wm