Initial commit

1 files changed, 62 insertions, 0 deletions

diff --git a/src/texture_manager.rs b/src/texture_manager.rs
new file mode 100644
index 0000000..32a61a0
--- /dev/null
+++ b/src/texture_manager.rs
@@ -0,0 +1,62 @@
+use std::collections::HashMap;
+use std::path::Path;
+
+use sdl2::image::LoadTexture;
+use sdl2::render::{Texture, TextureCreator};
+
+pub const ASSET_PATH_STR: &str = "assets";
+
+pub struct TextureManager<T>
+{
+    texture_creator: TextureCreator<T>,
+    textures:        HashMap<String, Texture>,
+}
+
+impl<T> TextureManager<T>
+{
+    pub fn new(texture_creator: TextureCreator<T>) -> Self
+    {
+        Self {
+            texture_creator,
+            textures: HashMap::new(),
+        }
+    }
+
+    pub fn preload<S>(&mut self, filename: S) -> Result<(), String>
+    where
+        S: AsRef<Path>,
+    {
+        let filename_str = filename
+            .as_ref()
+            .to_str()
+            .expect("Only filenames with valid Unicode are allowed.");
+        if self.textures.contains_key(filename_str) {
+            return Ok(());
+        }
+
+        let texture = self
+            .texture_creator
+            .load_texture(Path::new(ASSET_PATH_STR).join(&filename))?;
+        self.textures.insert(filename_str.to_string(), texture);
+        Ok(())
+    }
+
+    pub fn get<S>(&mut self, filename: S) -> Result<&Texture, String>
+    where
+        S: AsRef<Path>,
+    {
+        self.preload(&filename)?;
+
+        Ok(self
+            .textures
+            .get(filename.as_ref().to_str().unwrap())
+            .unwrap())
+    }
+
+    pub fn get_never_load<S>(&self, filename: S) -> Option<&Texture>
+    where
+        S: AsRef<Path>,
+    {
+        self.textures.get(filename.as_ref().to_str().unwrap())
+    }
+}