factor out common utils into module

1 files changed, 30 insertions, 0 deletions

diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..e36a8cc
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,30 @@
+use crate::consts::FONT_PATH;
+use sdl2::{pixels::Color, render::Canvas, ttf::Sdl2TtfContext, video::Window};
+
+#[macro_export]
+macro_rules! rect(
+    ($x:expr, $y:expr, $w:expr, $h:expr) => (
+        ::sdl2::rect::Rect::new($x as i32, $y as i32, $w as u32, $h as u32)
+    )
+);
+
+pub fn draw_text<S: AsRef<str>>(
+    canvas: &mut Canvas<Window>,
+    ttf_context: &Sdl2TtfContext,
+    text: S,
+    color: Color,
+    (x, y): (u32, u32),
+) {
+    let text = text.as_ref();
+    let texture_creator = canvas.texture_creator();
+    let mut font = ttf_context.load_font(FONT_PATH, 17).unwrap();
+    font.set_style(sdl2::ttf::FontStyle::NORMAL);
+    font.set_hinting(sdl2::ttf::Hinting::Mono);
+    let surface = font.render(text.as_ref()).blended(color).unwrap();
+    let texture = texture_creator
+        .create_texture_from_surface(&surface)
+        .unwrap();
+    let (width, height) = font.size_of_latin1(text.as_bytes()).unwrap();
+    let area = rect!(x, y, width, height);
+    canvas.copy(&texture, None, area).unwrap();
+}