Allow custom renderers in Program and Application

graphics/src/settings.rs

@@ -0,0 +1,29 @@
+use crate::core::{Font, Pixels};
+use crate::Antialiasing;
+
+/// The settings of a Backend.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub struct Settings {
+    /// The default [`Font`] to use.
+    pub default_font: Font,
+
+    /// The default size of text.
+    ///
+    /// By default, it will be set to `16.0`.
+    pub default_text_size: Pixels,
+
+    /// The antialiasing strategy that will be used for triangle primitives.
+    ///
+    /// By default, it is `None`.
+    pub antialiasing: Option<Antialiasing>,
+}
+
+impl Default for Settings {
+    fn default() -> Settings {
+        Settings {
+            default_font: Font::default(),
+            default_text_size: Pixels(16.0),
+            antialiasing: None,
+        }
+    }
+}