add pixel_perfect feature, document stuff

hui/Cargo.toml

@@ -23,9 +23,15 @@ fontdue = "0.8"
 rect_packer = "0.2"
 log = "0.4"
 nz = "0.3"
+document-features = "0.2"
 
 [features]
-default = ["builtin_elements", "builtin_font"]
+default = ["builtin_elements", "builtin_font", "pixel_perfect"]
+## Enable the built-in font (ProggyTiny, adds 35kb to the executable)
 builtin_font = []
+## Enable the built-in elements (`Container`, `ProgressBar`, etc.)
 builtin_elements = []
+## Round vertex positions to nearest integer coordinates (fixes blurry text)
+pixel_perfect = []
+
 #parallel = ["dep:rayon", "fontdue/parallel"]

hui/src/draw.rs

@@ -317,6 +317,10 @@ impl UiDrawPlan {
           }
         }
       }
+      #[cfg(feature = "pixel_perfect")]
+      swapper.current_mut().vertices.iter_mut().for_each(|v| {
+        v.position = v.position.floor()
+      });
       prev_command = Some(command);
     }
     Self {

hui/src/lib.rs

@@ -1,9 +1,12 @@
-#![forbid(unsafe_code)]
-#![forbid(unsafe_op_in_unsafe_fn)]
 #![doc(html_logo_url = "https://raw.githubusercontent.com/griffi-gh/hui/master/.assets/hui.svg")]
 //!
 //! Simple UI library for games and other interactive applications
 //!
+//! # Features
+#![doc = document_features::document_features!()]
+
+#![forbid(unsafe_code)]
+#![forbid(unsafe_op_in_unsafe_fn)]
 
 use std::collections::VecDeque;