Revised lib's API to better fit winit's

* switched to slave type API
* started implementing winit's initialization

src/canvas.rs

@@ -13,11 +13,34 @@ use std::{
     cell::RefCell,
 };
 
+//--Application trait-------------------------------------------------------------------------------
+pub trait Application {
+
+    fn init(&mut self, canvas: &mut Canvas) -> Result<(), &'static str>;
+
+    fn tick(&mut self, canvas: &mut Canvas) -> Result<(), &'static str>;
+}
+
 //--Canvas struct-----------------------------------------------------------------------------------
 pub struct Canvas {}
 
 impl Canvas {
 
+    pub fn create<T: Into<String>, A: Application>(title: T, size: Size, app: A) {
+        use winit::{
+            event_loop::EventLoop,
+            window::WindowBuilder,
+        };
+
+        let event_loop = EventLoop::new();
+        let window = WindowBuilder::new()
+            .with_inner_size(size)
+            .with_resizable(false)
+            .with_title(title)
+            .build(&event_loop)
+            .unwrap();
+    }
+
     //--Create functions--
     pub fn create_texture_sprite(&mut self, _size: Size, _scale: f32) -> TextureSprite {
         unimplemented!();

src/lib.rs

@@ -1,5 +1,22 @@
+mod canvas;
+pub use canvas::Canvas;
+pub use canvas::Application;
+pub mod io;
+pub mod shape;
+pub mod sprite;
+pub mod texture;
+pub mod utils;
+
+use utils::Size;
+
+pub fn create_vk_canvas<A: Application>(_title: &'static str, _size: Size, app: A) -> !
+{
+    unimplemented!();
+}
+
 #[cfg(test)]
 mod tests {
+    use crate::{Application, Canvas};
 
     fn setup_logger() -> Result<(), fern::InitError> {
         use fern::colors::{Color, ColoredLevelConfig};
@@ -27,20 +44,24 @@ mod tests {
         Ok(())
     }
 
-    #[test]
-    fn vk_create() {
-        let canvas = crate::create_vk_canvas("vk_create", 1280, 720)
-            .unwrap();
+    struct TestApp {}
+
+    impl Application for TestApp {
+
+        fn init(&mut self, _canvas: &mut Canvas) -> Result<(), &'static str> {
+            Ok(())
+        }
+
+        fn tick(&mut self, _canvas: &mut Canvas) -> Result<(), &'static str> {
+            Ok(())
+        }
     }
 
     #[test]
-    fn vk_run() {
+    fn vk_create() {
+        use crate::utils::Size;
 
-        let canvas = crate::create_vk_canvas("vk_run", 1280, 720)
-            .unwrap();
-
-        canvas.update();
-        canvas.destroy();
+        crate::create_vk_canvas("vk_create", Size {w: 1280, h: 720}, TestApp {});
     }
 }
 

src/main.rs

@@ -1,3 +1,4 @@
+use canvas::{Application, Canvas};
 
 fn setup_logger() -> Result<(), fern::InitError> {
     use fern::colors::{Color, ColoredLevelConfig};
@@ -25,15 +26,22 @@ fn setup_logger() -> Result<(), fern::InitError> {
     Ok(())
 }
 
-fn main() -> Result<(), &'static str> {
+struct ExampleApp {}
 
-    setup_logger()
-        .map_err(|_| "Failed to setup logger")?;
+impl Application for ExampleApp {
 
-    let canvas = crate::create_vk_canvas("vk_example", 1280, 720)
-        .unwrap();
+    fn init(&mut self, _canvas: &mut Canvas) -> Result<(), &'static str> {
+        Ok(())
+    }
+
+    fn tick(&mut self, canvas: &mut Canvas) -> Result<(), &'static str> {
+        use canvas::{
+            io::Key,
+            sprite::Sprite,
+            utils::{Position, Size, Color, Pixel},
+            shape::{Shape, Rectangle},
+        };
 
-    while canvas.should_exit() == false {
         // inputs
         if canvas.key_pressed(Key::A) {
             unimplemented!();
@@ -43,57 +51,68 @@ fn main() -> Result<(), &'static str> {
             unimplemented!();
         }
         
-        match canvas.get_keys() {
+        match canvas.get_key_presses() {
             Key::A => unimplemented!(),
             _ => (),
         }
         
-        let mouse = canvas.get_mouse();
+        match canvas.get_key_releases() {
+            Key::A => unimplemented!(),
+            _ => (),
+        }
+
+        let _mouse = canvas.get_mouse_position();
 
         // outputs
-        canvas.set_clear_color(Color::black);
+        canvas.set_clear_color(Color::BLACK);
+        canvas.clear();
 
         // 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,
-        ));
+        let mut bas_sprite = canvas.create_shape_sprite();
+        bas_sprite.set_shape(Shape::Rectangle (Rectangle {size: Size {w: 38, h: 38}}));
+        bas_sprite.set_color(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)
+            "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}));
+        let mut pix_sprite = canvas.create_texture_sprite(Size {w: 20, h: 20}, 1.0);
+        pix_sprite.set_texture(texture, Some(Position {x: 0, y: 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();
+        let texture = canvas.create_texture(Size {w: 20, h: 20}, Some(Color::WHITE));
+        texture.borrow_mut().set_pixel(Position {x: 0, y: 0}, Pixel::rgb(0, 255, 0));
+        let _  = texture.borrow_mut().iter_mut(); //iterate on whole texture
         pix_sprite = canvas.create_texture_sprite(Size {w: 20, h: 20}, 2.0);
         pix_sprite.set_texture(texture, None);
+        let _  = pix_sprite.iter_mut(); //only iterate on the part used by the sprite
         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);
+        let mut txt_sprite = canvas.create_text_sprite(Size {w: 10, h: 10}, 5.0);
+        txt_sprite.set_text("text");
+        txt_sprite.set_color(Color::BLACK);
 
         // generic operations
         txt_sprite.set_position(Position {x: 0, y: 0});
-        txt_sprite.set_rotation(50);
+        txt_sprite.set_rotation(50.0);
         txt_sprite.set_alpha(255);
+        txt_sprite.set_scale(0.5);
         canvas.draw(txt_sprite);
 
-        canvas.update();
-    }
-
-    canvas.destroy();
         Ok(())
+    }
+}
+
+fn main() -> Result<(), &'static str> {
+    use canvas::utils::Size;
+
+    setup_logger()
+        .map_err(|_| "Failed to setup logger")?;
+    canvas::create_vk_canvas("vk_example", Size {w: 1280, h: 720}, ExampleApp {});
 }
 

src/utils.rs

@@ -1,6 +1,8 @@
 #[allow(unused_imports)]
 use log::{debug, error, info, trace, warn};
 
+use winit;
+
 //--Position struct---------------------------------------------------------------------------------
 pub struct Position {
     pub x: u32, 
@@ -13,6 +15,17 @@ pub struct Size {
     pub h: u32,
 }
 
+impl From<Size> for winit::dpi::Size {
+
+    fn from(size: Size) -> Self {
+        winit::dpi::Size::Logical (
+            winit::dpi::LogicalSize {
+                width: size.w.into(), 
+                height: size.h.into()
+        })
+    }
+}
+
 //--Pixel struct------------------------------------------------------------------------------------
 #[derive(Copy, Clone)]
 struct Rgba {