mark Image constructor as explicit to avoid accidental implicit argument conversion

when passing a std::string instead of an Image, the parameter gets implicitly and automatically converted (== parsed) to a temporary Image object. Since parsing an Image shouldn't be a frequent operation

1 files changed, 1 insertions, 1 deletions

diff --git a/include/mbgl/util/image.hpp b/include/mbgl/util/image.hpp
index 91a451890f..f58c2c0989 100644
--- a/include/mbgl/util/image.hpp
+++ b/include/mbgl/util/image.hpp
@@ -12,7 +12,7 @@ std::string compress_png(int width, int height, const void *rgba);
 
 class Image {
 public:
-    Image(const std::string &img);
+    explicit Image(const std::string &img);
 
     inline const char *getData() const { return img.get(); }
     inline uint32_t getWidth() const { return width; }