generate LVGL 9 binary

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/lib/common/image_resizer.dart

@@ -0,0 +1,45 @@
+import 'package:image/image.dart' as img;
+import 'package:injectable/injectable.dart';
+
+@singleton
+class ImageResizer {
+  static const int maxWidth = 480;
+  static const int maxHeight = 320;
+
+  img.Image resizeToFit(img.Image image) {
+    final w = image.width;
+    final h = image.height;
+
+    if (w <= maxWidth && h <= maxHeight) {
+      return image;
+    }
+
+    final aspectRatio = w / h;
+    int newWidth;
+    int newHeight;
+
+    if (w > h) {
+      newWidth = maxWidth;
+      newHeight = (maxWidth / aspectRatio).round();
+      if (newHeight > maxHeight) {
+        newHeight = maxHeight;
+        newWidth = (maxHeight * aspectRatio).round();
+      }
+    } else {
+      newHeight = maxHeight;
+      newWidth = (maxHeight * aspectRatio).round();
+      if (newWidth > maxWidth) {
+        newWidth = maxWidth;
+        newHeight = (maxWidth / aspectRatio).round();
+      }
+    }
+
+    return img.copyResize(
+      image,
+      width: newWidth,
+      height: newHeight,
+      interpolation: img.Interpolation.linear,
+    );
+  }
+}
+