wallpaper: calculate average color

1 files changed, 58 insertions, 0 deletions

diff --git a/include/wanda/magic.hpp b/include/wanda/magic.hpp
new file mode 100644
index 0000000..fcb153e
--- /dev/null
+++ b/include/wanda/magic.hpp
@@ -0,0 +1,58 @@
+#ifndef WANDA_MAGIC_HPP
+#define WANDA_MAGIC_HPP
+
+#include <magic.h>
+
+#include <filesystem>
+#include <memory>
+#include <string>
+#include <type_traits>
+
+namespace wanda
+{
+  struct magic
+  {
+    struct closer
+    {
+      auto operator()(magic_t handle) const noexcept -> void
+      {
+        magic_close(handle);
+      }
+    };
+
+    enum struct mime_type
+    {
+      unknown,
+      image_jpeg,
+      image_png,
+    };
+
+    magic()
+        : m_handle{magic_open(MAGIC_MIME_TYPE)}
+    {
+      magic_load(m_handle.get(), nullptr);
+    }
+
+    auto type(std::filesystem::path path) -> mime_type
+    {
+      auto magic_type = std::string{magic_file(m_handle.get(), path.native().c_str())};
+
+      if (magic_type == "image/jpeg")
+      {
+        return mime_type::image_jpeg;
+      }
+      else if (magic_type == "image/png")
+      {
+        return mime_type::image_png;
+      }
+
+      return mime_type::unknown;
+    }
+
+  private:
+    std::unique_ptr<std::remove_pointer_t<magic_t>, closer> m_handle;
+  };
+
+}  // namespace wanda
+
+#endif
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