automatically derive fb dimensions

include/llmr/map/map.hpp

@@ -28,6 +28,7 @@ public:
     void setup();
     void loadStyle(const uint8_t *const data, uint32_t bytes);
     void loadSettings();
+    void resize(uint16_t width, uint16_t height, float ratio = 1);
     void resize(uint16_t width, uint16_t height, float ratio, uint16_t fb_width, uint16_t fb_height);
 
     /* callback */

src/map/map.cpp

@@ -70,6 +70,10 @@ void Map::loadSettings() {
     update();
 }
 
+void Map::resize(uint16_t width, uint16_t height, float ratio) {
+    resize(width, height, ratio, width * ratio, height * ratio);
+}
+
 void Map::resize(uint16_t width, uint16_t height, float ratio, uint16_t fb_width, uint16_t fb_height) {
     transform.resize(width, height, ratio, fb_width, fb_height);
     painter.resize();