Move ggez example to tour

examples/tour/renderer.rs

@@ -0,0 +1,63 @@
+mod button;
+mod checkbox;
+mod debugger;
+mod image;
+mod radio;
+mod slider;
+mod text;
+
+use ggez::graphics::{
+    self, spritebatch::SpriteBatch, Font, Image, MeshBuilder,
+};
+use ggez::Context;
+
+pub struct Renderer<'a> {
+    pub context: &'a mut Context,
+    pub sprites: SpriteBatch,
+    pub spritesheet: Image,
+    pub font: Font,
+    font_size: f32,
+    debug_mesh: Option<MeshBuilder>,
+}
+
+impl Renderer<'_> {
+    pub fn new(
+        context: &mut Context,
+        spritesheet: Image,
+        font: Font,
+    ) -> Renderer {
+        Renderer {
+            context,
+            sprites: SpriteBatch::new(spritesheet.clone()),
+            spritesheet,
+            font,
+            font_size: 20.0,
+            debug_mesh: None,
+        }
+    }
+
+    pub fn flush(&mut self) {
+        graphics::draw(
+            self.context,
+            &self.sprites,
+            graphics::DrawParam::default(),
+        )
+        .expect("Draw sprites");
+
+        graphics::draw_queued_text(
+            self.context,
+            graphics::DrawParam::default(),
+            Default::default(),
+            graphics::FilterMode::Linear,
+        )
+        .expect("Draw text");
+
+        if let Some(debug_mesh) = self.debug_mesh.take() {
+            let mesh =
+                debug_mesh.build(self.context).expect("Build debug mesh");
+
+            graphics::draw(self.context, &mesh, graphics::DrawParam::default())
+                .expect("Draw debug mesh");
+        }
+    }
+}