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use std::fs::File;
use std::io::Write;
use crate::common::{DisplayBuffer, IMG_HEIGHT, IMG_WIDTH};
pub struct View<'a> {
pub display_buffer: &'a DisplayBuffer,
pub viewer: fn(&DisplayBuffer) -> Result<String, std::io::Error>,
}
impl<'a> View<'a> {
pub fn display(&self) {
let result = (self.viewer)(self.display_buffer);
match result {
Ok(success_msg) => {
println!("{}", success_msg);
},
Err(error_msg) => {
eprintln!("{}", error_msg);
}
}
}
}
pub mod render_viewer {
use image::ImageFormat;
use crate::common::Pixel;
use super::*;
pub fn ppm_exporter(data: &DisplayBuffer) -> Result<String, std::io::Error> {
let file_name = "output.ppm";
let mut file = File::create(file_name)?;
// header
let mut txt_data = String::from("P3\n");
txt_data.push_str(format!("{} {}\n255\n", IMG_WIDTH, IMG_HEIGHT).as_str());
// data point
data.iter().for_each(|row| {
row.iter().for_each(|&pixel| {
txt_data.push_str(&format!("{} {} {}\n", pixel.r, pixel.g, pixel.b));
})
});
file.write_all(txt_data.as_bytes())?;
Ok(format!("Output rendered to file {}", file_name))
}
fn common_img_format_exporter(data: &DisplayBuffer, img_format: ImageFormat) -> Result<String, std::io::Error> {
let ext = match img_format {
ImageFormat::Png => { "png" }
ImageFormat::Jpeg => { "jpeg" }
ImageFormat::Bmp => { "bmp" }
_ => {
return Err(std::io::Error::new(std::io::ErrorKind::Other, "Not supported"));
}
};
let file_name = format!("output.{}", ext);
let mut imgbuf = image::ImageBuffer::new(IMG_WIDTH as u32, IMG_HEIGHT as u32);
for (x, y, pixel) in imgbuf.enumerate_pixels_mut() {
let Pixel{r, g, b} = data[y as usize][x as usize];
*pixel = image::Rgb([r, g, b]);
}
imgbuf.save(file_name.clone()).unwrap();
Ok(format!("Output rendered to file {}", file_name))
}
pub fn png_exporter(data: &DisplayBuffer) -> Result<String, std::io::Error> {
common_img_format_exporter(data, ImageFormat::Png)
}
pub fn jpeg_exporter(data: &DisplayBuffer) -> Result<String, std::io::Error> {
common_img_format_exporter(data, ImageFormat::Jpeg)
}
pub fn bmp_exporter(data: &DisplayBuffer) -> Result<String, std::io::Error> {
common_img_format_exporter(data, ImageFormat::Bmp)
}
}
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