#gamedev #ecs #image #sprite #blitting

specs-blit

2D sprite rendering extension for the Specs ECS system

7 releases

✓ Uses Rust 2018 edition

0.1.5 Feb 14, 2020
0.1.4 Feb 12, 2020
0.1.3-alpha.0 Jan 1, 2020
0.1.2 Dec 31, 2019

#56 in Images

Download history 42/week @ 2019-12-29 17/week @ 2020-01-05 9/week @ 2020-01-12 17/week @ 2020-01-19 1/week @ 2020-01-26 81/week @ 2020-02-02 37/week @ 2020-02-09 94/week @ 2020-02-16

64 downloads per month
Used in rocket-game

GPL-3.0 license

34KB
77 lines

specs-blit

2D sprite rendering extension for the Specs ECS system.

Build Status Version Rust Documentation License

All sprites are loaded onto a big array on the heap.

Example

// Setup the specs world
let mut world = specs::World::new();

// Load the blit components into the world
world.register::<specs_blit::Sprite>();

// Add the pixel buffer as a resource so it can be accessed from the RenderSystem later
const WIDTH: usize = 800;
const HEIGHT: usize = 600;
world.insert(specs_blit::PixelBuffer::new(WIDTH, HEIGHT));

let sprite_ref = {
    // Load the image using the image crate
    let img = image::open("examples/smiley.png")?;
    // Create a sprite from it
	const MASK_COLOR: u32 = 0xFF00FF;
    let sprite = blit::blit_buffer(&img, blit::Color::from_u32(MASK_COLOR));

    // Move the sprite to the render system
    specs_blit::load(sprite)?
};

// Create a new sprite entity in the ECS system
world.create_entity()
	.with(specs_blit::Sprite::new(sprite_ref))
	.build();

// Setup the dispatcher with the blit system
let mut dispatcher = specs::DispatcherBuilder::new()
	.with_thread_local(specs_blit::RenderSystem)
	.build();

// Enter the render loop that should be called every frame
while render_frame() {
	// Update specs
	dispatcher.dispatch(&mut world);

	// Add/remove entities added in dispatch through `LazyUpdate`
	world.maintain();

	// Get the pixel buffer resource to render it
	let buffer = world.read_resource::<specs_blit::PixelBuffer>();
	// Render the pixel buffer
	window.update_with_buffer(&buffer.pixels(), buffer.width(), buffer.height())?;
}

Dependencies

~6.5MB
~134K SLoC