issue.rs

extern crate image;

pub mod zoom {

	use gif::{Encoder, Repeat, SetParameter};
	use gif;

	use image::{GenericImage, DynamicImage, FilterType};
	use std::fs::File;
	use std::borrow::Cow;
	
	pub fn process(source: DynamicImage, output: String) {

		println!("Began processing source v0.0.2.");
		let mut frame_array: Vec<gif::Frame> = Vec::new();
		println!("Made frame array");


		// let mut first_frame = gif::Frame::from_rgb(source.width() as u16, source.height() as u16, source.raw_pixels().into_iter().as_slice());
		
		// let mut first_frame = gif::Frame::default();

		// first_frame.height = source.height() as u16;
		// first_frame.width  = source.width() as u16;
		// let source_iter = source.raw_pixels().into_iter();
		// let temp_slice = source_iter.to_owned();
		// let owned_slice = temp_slice.as_slice();
		// first_frame.buffer = Cow::Borrowed(owned_slice);
		
		// println!("Made first frame");
		// frame_array.push(first_frame); // Push first frame

		println!("Pushed first frame, processing width and height");
		let width = source.width();
		let height = source.height();

		let frames = 30;
		let seconds = 3;

		let mut resized: DynamicImage;
		println!("Started Resize Operation");
		for i in 0..frames {
			println!("Processing frame: {:3}", i);
			resized = source.resize(width + (4 * i), height + (4 * i), FilterType::Lanczos3);


			let cropped: DynamicImage = resized.crop(0, 0, width, height);

			let mut this_frame = gif::Frame::default();
			this_frame.height = cropped.height() as u16;
			this_frame.width = cropped.width() as u16;
			let buffer = cropped.raw_pixels().clone();
			this_frame.buffer = Cow::Borrowed(buffer.as_slice()); //expects an owned u8 collection [u8]

			frame_array.push(this_frame);

		}

		let mut image = File::create(output).unwrap();
		let mut gif_encoder = Encoder::new(&mut image, source.width() as u16, source.height() as u16, &[]).unwrap();
		gif_encoder.set(Repeat::Infinite).unwrap();

		println!("Started writing data.");
		for frame in frame_array {
			// // let gif_frame = gif::Frame::from_rgba(source.width() as u16, source.height() as u16, frame.into_buffer());
			// let gif_frame = gif::Frame::default();
			// gif_frame.buffer = Cow::Borrowed(frame.buffer);
			// gif_frame.height = source.height() as u16;
			// gif_frame.width  = source.width() as u16;
			gif_encoder.write_frame(&frame).unwrap();
		}
	}
}