Improve API and separate bin and lib

Reworked API, does not compile

src/lib.rs

@@ -0,0 +1,46 @@
+#[cfg(test)]
+mod tests {
+
+    fn setup_logger() -> Result<(), fern::InitError> {
+        use fern::colors::{Color, ColoredLevelConfig};
+
+        let colors = ColoredLevelConfig::new()
+            .info(Color::Green)
+            .debug(Color::Magenta)
+            .warn(Color::Yellow)
+            .error(Color::Red);
+
+        fern::Dispatch::new()
+            .format(move |out, message, record| {
+                out.finish(format_args!(
+                    "{}[{}][{}] {}",
+                    chrono::Local::now().format("[%H:%M:%S]"),
+                    colors.color(record.level()),
+                    record.target(),
+                    message
+                ))
+            })
+            .level(log::LevelFilter::Trace)
+            .chain(std::io::stdout())
+            .chain(fern::log_file("output.log")?)
+            .apply()?;
+        Ok(())
+    }
+
+    #[test]
+    fn vk_create() {
+        let canvas = crate::create_vk_canvas("vk_create", 1280, 720)
+            .unwrap();
+    }
+
+    #[test]
+    fn vk_run() {
+
+        let canvas = crate::create_vk_canvas("vk_run", 1280, 720)
+            .unwrap();
+
+        canvas.update();
+        canvas.destroy();
+    }
+}
+

src/main.rs

@@ -1,7 +1,5 @@
-#[cfg(test)]
-mod tests {
 
-    fn setup_logger() -> Result<(), fern::InitError> {
+fn setup_logger() -> Result<(), fern::InitError> {
     use fern::colors::{Color, ColoredLevelConfig};
 
     let colors = ColoredLevelConfig::new()
@@ -25,20 +23,18 @@ mod tests {
         .chain(fern::log_file("output.log")?)
         .apply()?;
     Ok(())
-    }
+}
 
-    #[test]
-    fn vk_create() {
-        let canvas = crate::create_vk_canvas("vk_create", 1280, 720, |_| {}, |_| {})
-            .unwrap();
-    }
+fn main() -> Result<(), &'static str> {
 
-    #[test]
-    fn vk_run() {
+    setup_logger()
+        .map_err(|_| "Failed to setup logger")?;
 
-        let canvas = crate::create_vk_canvas("vk_run", 1280, 720, |_| {}, |_| {})
+    let canvas = crate::create_vk_canvas("vk_example", 1280, 720)
         .unwrap();
 
+    while canvas.should_exit() == false {
+        // inputs
         if canvas.key_pressed(Key::A) {
             unimplemented!();
         }
@@ -54,19 +50,50 @@ mod tests {
 
         let mouse = canvas.get_mouse();
 
-        let sprite = canvas.create_sprite(Size {w: 20, h: 20}, 1.0);
-        sprite.draw(&[[0u8, 0u8, 0u8, 225u8]; 20 * 20]);
-        sprite.clear_color(Color::black);
-        sprite.draw_rectangle(Position {x: 0, y: 0}, Size {w: 10, h: 10}, Color::black);
-        sprite.draw_text(Position {x: 0, y: 0}, 5, Color::black, "text");
-        sprite.move_to(Position {x: 0, y: 0});
-        sprite.rotate(50);
-        sprite.set_alpha(255);
-        sprite.hide();
-        sprite.show();
+        // outputs
+        canvas.set_clear_color(Color::black);
+
+        // white rectangle inset by one in the sprite
+        let bas_sprite = canvas.create_basic_sprite(Size {w: 40, h: 40}, 1.0);
+        bas_sprite.set_shape(
+            Shape::Rectangle (Position {x: 1, y: 1}, 
+                              Size {w: 38, h: 38}, 
+                              Color::White,
+        ));
+        canvas.draw(bas_sprite);
+
+        // 20 x 20 sprite of a picture
+        let texture = canvas.create_texture_from_file(
+            Position {x: 0, y: 0}, 
+            Some("texture.png"), 
+            Some(Color::White)
+        );
+        pix_sprite = canvas.create_texture_sprite(Size {w: 20, h: 20}, 1.0);
+        pix_sprite.set_texture(texture, Some(Position {w: 0, h: 0}));
+        canvas.draw(pix_sprite);
+
+        // scaled sprite of a manually drawed texture
+        let texture = canvas.create_texture(Size {w: 20, h: 20}, Some(Color::White));
+        texture.set_pixel(Position {x: 0, y: 0}, Pixel::rgb(0, 255, 0));
+        let _  = texture.pixels();
+        pix_sprite = canvas.create_texture_sprite(Size {w: 20, h: 20}, 2.0);
+        pix_sprite.set_texture(texture, None);
+        canvas.draw(pix_sprite);
+
+        // floating text
+        let txt_sprite = canvas.create_text_sprite(Size {w: 10, h: 10}, 5.0);
+        txt_sprite.set_text("text", None);
+
+        // generic operations
+        txt_sprite.set_position(Position {x: 0, y: 0});
+        txt_sprite.set_rotation(50);
+        txt_sprite.set_alpha(255);
+        canvas.draw(txt_sprite);
 
         canvas.update();
-        canvas.destroy();
     }
+
+    canvas.destroy();
+    Ok(())
 }