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, 18 insertions, 6 deletions

diff --git a/src/window_manager.cpp b/src/window_manager.cpp
index de322df..eadf7ff 100644
--- a/src/window_manager.cpp
+++ b/src/window_manager.cpp
@@ -19,6 +19,7 @@
 
 #include "window_manager.hpp"
 #include "json_helper.hpp"
+#include "wm_config.hpp"
 #include "applist.hpp"
 
 extern "C"
@@ -146,6 +147,7 @@ WindowManager::WindowManager(wl::display *d)
 
 int WindowManager::init()
 {
+    int ret;
     if (!this->display->ok())
     {
         return -1;
@@ -201,7 +203,8 @@ int WindowManager::init()
     // Third level objects
     this->display->roundtrip();
 
-    return init_layers();
+    ret = init_layers();
+    return ret;
 }
 
 int WindowManager::dispatch_pending_events()
@@ -654,12 +657,22 @@ int WindowManager::init_layers()
         return -1;
     }
 
+    WMConfig wm_config;
+    wm_config.loadConfigs();
+
     auto &c = this->controller;
 
     auto &o = this->outputs.front();
     auto &s = c->screens.begin()->second;
     auto &layers = c->layers;
 
+    this->layers.loadAreaDb();
+    const compositor::rect base = this->layers.getAreaSize("fullscreen");
+
+    const std::string aspect_setting = wm_config.getConfigAspect();
+    const compositor::rect scale_rect =
+        this->layers.getScaleDestRect(o->width, o->height, aspect_setting);
+
     // Write output dimensions to ivi controller...
     c->output_size = compositor::size{uint32_t(o->width), uint32_t(o->height)};
     c->physical_size = compositor::size{uint32_t(o->physical_width),
@@ -674,9 +687,11 @@ int WindowManager::init_layers()
     // Quick and dirty setup of layers
     for (auto const &i : this->layers.mapping)
     {
-        c->layer_create(i.second.layer_id, o->width, o->height);
+        c->layer_create(i.second.layer_id, scale_rect.w, scale_rect.h);
         auto &l = layers[i.second.layer_id];
-        l->set_destination_rectangle(0, 0, o->width, o->height);
+        l->set_source_rectangle(0, 0, base.w, base.h);
+        l->set_destination_rectangle(
+            scale_rect.x, scale_rect.y, scale_rect.w, scale_rect.h);
         l->set_visibility(1);
         HMI_DEBUG("wm", "Setting up layer %s (%d) for surface role match \"%s\"",
                   i.second.name.c_str(), i.second.layer_id, i.second.role.c_str());
@@ -687,9 +702,6 @@ int WindowManager::init_layers()
 
     this->layout_commit();
 
-    this->layers.loadAreaDb();
-    this->layers.setupArea(o->width, o->height);
-
     return 0;
 }