change to png only process

Cargo.toml

@@ -4,4 +4,6 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
-photon-rs = "0.3.3"
+png = "0.17.16"
+tokio = { version = "1.46.0", features = ["full"] }
+fast_image_resize = "5.1.4"

src/main.rs

@@ -1,46 +1,75 @@
-use photon_rs::{
+use fast_image_resize as fr;
-    PhotonImage, multiple::watermark, native::open_image, native::save_image, transform::resize,
+use fr::{PixelType, ResizeAlg, ResizeOptions, Resizer, images::Image};
-};
+use std::io::Cursor;
-
+use tokio::fs;
-fn main() {
+#[tokio::main]
+async fn main() {
+    let start = std::time::Instant::now();
     let base_path = "/mnt/c/Users/Formulatrix/Documents/Explorations/WebApplication1/tiles1705/";
-    const SCALE: f64 = 0.01;
+    const SCALE: f64 = 0.3;
     const SIZE: u32 = 720;
     let actual_size = (SIZE as f64 * SCALE).trunc() as u32;
 
     // Open the image (a PhotonImage is returned)
+    // let max_col = 30;
+    // let max_row = 30;
     let max_col = 31;
     let max_row = 55;
-    let mut res = new_empty_image(actual_size * max_row, actual_size * max_col);
+    let canvas_width = (max_row * actual_size) as usize;
+    let canvas_height = (max_col * actual_size) as usize;
+    let mut canvas = vec![0u8; canvas_width * canvas_height * 3];
+    let mut resizer = Resizer::new();
     for i in 1..=max_col {
         for j in 1..=max_row {
             let filename = format!("{}{}{}.png", base_path, number_to_column(i), j);
             // println!("{filename}");
 
-            let pre = open_image(filename).expect("File should open");
+            let data = Cursor::new(fs::read(filename).await.unwrap()); // .unwrap();
-            let img = resize(
+            let decoder = png::Decoder::new(data);
-                &pre,
+            let mut reader = decoder.read_info().unwrap();
-                actual_size,
+            let mut buf = vec![0; reader.output_buffer_size()];
-                actual_size,
+            let _info = reader.next_frame(&mut buf).unwrap();
-                photon_rs::transform::SamplingFilter::Nearest,
-            );
-            watermark(
-                &mut res,
-                &img,
-                actual_size as i64 * j as i64,
-                actual_size as i64 * i as i64,
-            );
-        }
-    }
 
-    // Apply a sepia effect to the image.
+            let src_img = Image::from_vec_u8(SIZE, SIZE, buf, PixelType::U8x3).unwrap();
-    save_image(res, "raw_image.png").expect("File should be saved");
+            let mut img = Image::new(actual_size, actual_size, PixelType::U8x3);
+
+            resizer
+                .resize(
+                    &src_img,
+                    &mut img,
+                    &ResizeOptions::new()
+                        .resize_alg(ResizeAlg::Nearest)
+                        .use_alpha(false),
+                )
+                .unwrap();
+            place_image(
+                &mut canvas,
+                canvas_width as usize,
+                canvas_height as usize,
+                &img.into_vec(),
+                (actual_size) as usize,
+                (actual_size) as usize,
+                (j * actual_size) as usize,
+                (i * actual_size) as usize,
+            );
         }
-pub fn new_empty_image(width: u32, height: u32) -> PhotonImage {
+    }
-    // 4 bytes per pixel (RGBA)
+    let file = std::fs::File::create("raw_image.png").unwrap();
-    let num_pixels = (width * height * 4) as usize;
+    let writer = std::io::BufWriter::new(file);
-    let raw_pixels = vec![0u8; num_pixels];
+
-    PhotonImage::new(raw_pixels, width, height)
+    let mut encoder = png::Encoder::new(
+        writer,
+        canvas_width.try_into().unwrap(),
+        canvas_height.try_into().unwrap(),
+    );
+    encoder.set_color(png::ColorType::Rgb);
+    encoder.set_depth(png::BitDepth::Eight);
+
+    let mut png_writer = encoder.write_header().unwrap();
+    png_writer.write_image_data(&canvas).unwrap();
+
+    let duration = start.elapsed();
+    println!("Operation completed in: {:.2?}", duration);
 }
 fn number_to_column(mut num: u32) -> String {
     let mut result = String::new();
@@ -54,3 +83,32 @@ fn number_to_column(mut num: u32) -> String {
 
     result
 }
+fn place_image(
+    canvas: &mut [u8],
+    canvas_width: usize,
+    canvas_height: usize,
+    image: &[u8],
+    image_width: usize,
+    image_height: usize,
+    x_offset: usize,
+    y_offset: usize,
+) {
+    let channels = 3;
+
+    for row in 0..image_height {
+        let canvas_y = y_offset + row;
+        if canvas_y >= canvas_height {
+            continue;
+        }
+
+        let canvas_start = (canvas_y * canvas_width + x_offset) * channels;
+        let canvas_end = canvas_start + image_width * channels;
+
+        let image_start = row * image_width * channels;
+        let image_end = image_start + image_width * channels;
+
+        if canvas_end <= canvas.len() && image_end <= image.len() {
+            canvas[canvas_start..canvas_end].copy_from_slice(&image[image_start..image_end]);
+        }
+    }
+}