Add SDL GFX usage

.cargo/config.toml

@@ -6,7 +6,7 @@ rustflags = [
     # "-C", "link-args=-g -gsource-map",
     "-C", "link-args=-sASYNCIFY -sALLOW_MEMORY_GROWTH=1",
     # "-C", "link-args=-sALLOW_MEMORY_GROWTH=1",
-    "-C", "link-args=-sUSE_SDL=2 -sUSE_SDL_IMAGE=2 -sUSE_SDL_MIXER=2 -sUSE_OGG=1 -sUSE_SDL_TTF=2 -sSDL2_IMAGE_FORMATS=['png']",
+    "-C", "link-args=-sUSE_SDL=2 -sUSE_SDL_IMAGE=2 -sUSE_SDL_MIXER=2 -sUSE_OGG=1 -sUSE_SDL_GFX=2 -sUSE_SDL_TTF=2 -sSDL2_IMAGE_FORMATS=['png']",
     # USE_OGG, USE_VORBIS for OGG/VORBIS usage
     "-C", "link-args=--preload-file assets/",
 ]

Cargo.lock

@@ -17,6 +17,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "c_vec"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fdd7a427adc0135366d99db65b36dae9237130997e560ed61118041fb72be6e8"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -221,6 +227,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7959277b623f1fb9e04aea73686c3ca52f01b2145f8ea16f4ff30d8b7623b1a"
 dependencies = [
  "bitflags",
+ "c_vec",
  "lazy_static",
  "libc",
  "sdl2-sys",

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 colors-transform = "0.2.11"
 lazy_static = "1.4.0"
 rand = "0.8.5"
-sdl2 = { version = "0.35", features = ["image", "ttf", "mixer"] }
+sdl2 = { version = "0.35", features = ["image", "ttf", "mixer", "gfx"] }
 spin_sleep = "1.1.1"
 tracing = { version = "0.1.37", features = ["max_level_debug", "release_max_level_debug"]}
 tracing-error = "0.2.0"

README.md

@@ -14,12 +14,11 @@ This is an experimental repository while testing a Rust + SDL2 project built wit
   - [ ] MacOS
   - [ ] Linux
   - This ensures that the project can iterate safely and be inspected in a safe environment, free from errors. Helps ensure errors are isolated to the machine or build script.
-- [ ] SDL2 Extensions
+- [X] SDL2 Extensions
   - [X] Image
   - [X] Mixer
   - [X] TTF
-  - [ ] GFX
-  - All of these libraries are common and necessary for a lot of projects. Ensuring they work is important.
+  - [X] GFX
 - [X] Example of External Javascript Interop
   - The basic ability to provide some kind of Javascript binding would be important for a decent web-based project or game.
   - The ability to use localStorage, fetch, or some browser-only API would be important.

src/main.rs

@@ -2,6 +2,7 @@ use std::process;
 use std::time::Duration;
 
 use sdl2::event::Event;
+use sdl2::gfx::primitives::DrawRenderer;
 use sdl2::image::LoadTexture;
 use sdl2::keyboard::Keycode;
 use sdl2::mixer;
@@ -92,10 +93,13 @@ fn main() {
 
     let storage = store::Store {};
 
-    let mut volume = storage.volume().map_or_else(|| {
-        println!("No volume stored, using default");
-        1
-    }, |v| v);
+    let mut volume = storage.volume().map_or_else(
+        || {
+            println!("No volume stored, using default");
+            1
+        },
+        |v| v,
+    );
     print!("Volume: {}", volume);
     mixer::Music::set_volume(volume as i32);
 
@@ -124,11 +128,18 @@ fn main() {
     let mut n = 0;
     let mut avg_fps = 0f64;
 
+    let mut mouse = Point::new(0, 0);
+    let mut previous_focus = false;
+
     loop {
         let start = now();
         let mut moved = false;
+
         for event in ctx.event_pump().unwrap().poll_iter() {
             match event {
+                Event::MouseMotion { x, y, .. } => {
+                    mouse = Point::new(x, y);
+                }
                 Event::Window { win_event, .. } => match win_event {
                     sdl2::event::WindowEvent::Resized(w, h) => {
                         println!("Resized to {}x{}", w, h);
@@ -217,6 +228,25 @@ fn main() {
         canvas.set_draw_color(BLACK);
         canvas.clear();
 
+        let focused = ctx.mouse().focused_window_id().is_some();
+        if focused != previous_focus {
+            println!("Focus: {:?}", focused);
+            previous_focus = focused;
+        }
+
+        // Draw a 32x32 square at the mouse position
+        if focused {
+            let mouse_x = (mouse.x / 32 * 32) as i16;
+            let mouse_y = (mouse.y / 32 * 32) as i16;
+            let color = Color::RGB(255, 255, 255);
+
+            let _ = canvas.line(mouse_x, mouse_y, mouse_x + 32, mouse_y, color);
+            let _ = canvas.line(mouse_x + 32, mouse_y, mouse_x + 32, mouse_y + 32, color);
+            let _ = canvas.line(mouse_x + 32, mouse_y + 32, mouse_x, mouse_y + 32, color);
+            let _ = canvas.line(mouse_x, mouse_y + 32, mouse_x, mouse_y, color);
+        }
+        // canvas.line(top_left.x as i16, top_left.y as i16, top_left.x as i16 + 32, top_left.y as i16 + 32, color);
+
         canvas
             .copy_ex(
                 &fruit_atlas,