Improve output of multiple screen resolution

[apps/agl-service-windowmanager-2017.git] / src / util.cpp

diff --git a/src/util.cpp b/src/util.cpp
index c178d90..672b089 100644 (file)
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2017 Mentor Graphics Development (Deutschland) GmbH
+ * 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.
@@ -26,14 +26,70 @@
 
 #ifdef SCOPE_TRACING
 thread_local int ScopeTrace::indent = 0;
-ScopeTrace::ScopeTrace(char const *func) : f(func) {
-   fprintf(stderr, "%lu %*s%s -->\n", pthread_self(), 2 * indent++, "", this->f);
+ScopeTrace::ScopeTrace(char const *func) : f(func)
+{
+    fprintf(stderr, "%lu %*s%s -->\n", pthread_self(), 2 * indent++, "", this->f);
 }
 ScopeTrace::~ScopeTrace() { fprintf(stderr, "%lu %*s%s <--\n", pthread_self(), 2 * --indent, "", this->f); }
 #endif
 
-unique_fd::~unique_fd() {
-   if (this->fd != -1) {
-      close(this->fd);
-   }
+unique_fd::~unique_fd()
+{
+    if (this->fd != -1)
+    {
+        close(this->fd);
+    }
 }
+
+void rectangle::fit(unsigned long to_width, unsigned long to_height)
+{
+    // fit rect within (to_width x to_height)
+
+    if (to_width <= width()) {
+        // scale to fit with
+        set_bottom(top() + (static_cast<long>(to_width) * height() / width()) - 1);
+        set_right(left() + to_width - 1);
+    } else {
+        // scale to fit height
+        set_right(left() + (static_cast<long>(to_height) * width () / height()) - 1);
+        set_bottom(top() + to_height - 1);
+    }
+}
+
+void rectangle::center(unsigned long outer_w, unsigned long outer_h)
+{
+    long inner_w = width();
+    long inner_h = height();
+
+    set_left((outer_w - inner_w) / 2);
+    set_right(left() + inner_w - 1);
+    set_top((outer_h - inner_h) / 2);
+    set_bottom(top() + inner_h - 1);
+}
+
+void rectangle::set_aspect(double ratio)
+{
+    // aspect ratio is width:height (= width/height)
+    // e.g. Landscape of HD's ratio is 16:9 (= 1.777...)
+    //      Portrait of HD's ratio is 9:16 (= 0.5625)
+    //
+    // width / height = ratio
+    // width * height = area
+    //
+    // width = sqrt(ratio * area)
+    // height = width / ratio
+
+    long orig_w = width();
+    long orig_h = height();
+
+    if (ratio >= 1) {
+        // width >= height
+        // try to keep width
+        set_right(left() + orig_w - 1);
+        set_bottom(top() + static_cast<long>(orig_w / ratio + 0.5) - 1);
+    } else {
+        set_bottom(top() + orig_h - 1);
+        set_right(left() + static_cast<long>(orig_h * ratio + 0.5) - 1);
+    }
+}
+