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use processing_glfw::GlfwContext;

use processing::prelude::*;

use processing_render::render::command::DrawCommand;

use processing_webcam::{webcam_create, webcam_destroy, webcam_image, webcam_is_connected};

fn main() {

match sketch() {

Ok(_) => {

eprintln!("Sketch completed successfully");

exit(0).unwrap();

}

Err(e) => {

eprintln!("Sketch error: {:?}", e);

exit(1).unwrap();

}

};

}

fn sketch() -> error::Result<()> {

let width = 640;

let height = 480;

let mut glfw_ctx = GlfwContext::new(width, height, false)?;

init(Config::default())?;

let surface = glfw_ctx.create_surface(width, height, false)?;

let graphics = graphics_create(surface, width, height, TextureFormat::Rgba16Float)?;

let webcam = webcam_create()?;

let mut image_entity = None;

while glfw_ctx.poll_events() {

graphics_begin_draw(graphics)?;

// Once connected, grab an image entity from the webcam stream

if image_entity.is_none() && webcam_is_connected(webcam)? {

image_entity = Some(webcam_image(webcam)?);

}

if let Some(img) = image_entity {

graphics_record_command(graphics, DrawCommand::BackgroundImage(img))?;

}

graphics_end_draw(graphics)?;

}

webcam_destroy(webcam)?;

Ok(())

}