Initial commit of an attempt of making my own wayland locker like swaylock

src/screenshot.rs

@@ -0,0 +1,99 @@
+pub struct Screenshot {
+    pub width: u32,
+    pub height: u32,
+    pub data: Vec<u8>,
+}
+
+impl Screenshot {
+    pub fn capture(
+        _output: wayland_client::protocol::wl_output::WlOutput,
+        width: i32,
+        height: i32,
+    ) -> Result<Self, String> {
+        let width = width as u32;
+        let height = height as u32;
+        let size = (width * height * 4) as usize;
+        let mut data = vec![0u8; size];
+
+        for i in 0..(width * height) as usize {
+            let offset = i * 4;
+            data[offset] = 40;
+            data[offset + 1] = 44;
+            data[offset + 2] = 52;
+            data[offset + 3] = 255;
+        }
+
+        Ok(Self {
+            width,
+            height,
+            data,
+        })
+    }
+
+    pub fn apply_blur(&mut self, radius: u32, times: u32) {
+        if radius == 0 || times == 0 {
+            return;
+        }
+
+        let mut img: image::ImageBuffer<image::Rgba<u8>, Vec<u8>> =
+            image::ImageBuffer::from_raw(self.width, self.height, self.data.clone())
+                .expect("Failed to create image buffer");
+
+        for _ in 0..times {
+            let mut rgb_data: Vec<[u8; 3]> =
+                Vec::with_capacity((self.width * self.height) as usize);
+            for pixel in img.pixels() {
+                rgb_data.push([pixel[0], pixel[1], pixel[2]]);
+            }
+
+            fastblur::gaussian_blur(
+                &mut rgb_data,
+                self.width as usize,
+                self.height as usize,
+                radius as f32,
+            );
+
+            for (i, pixel) in img.pixels_mut().enumerate() {
+                pixel[0] = rgb_data[i][0];
+                pixel[1] = rgb_data[i][1];
+                pixel[2] = rgb_data[i][2];
+            }
+        }
+
+        self.data = img.into_raw();
+    }
+
+    pub fn apply_vignette(&mut self, base: f32, factor: f32) {
+        let center_x = self.width as f32 / 2.0;
+        let center_y = self.height as f32 / 2.0;
+        let max_distance = (center_x * center_x + center_y * center_y).sqrt();
+
+        for y in 0..self.height {
+            for x in 0..self.width {
+                let dx = x as f32 - center_x;
+                let dy = y as f32 - center_y;
+                let distance = (dx * dx + dy * dy).sqrt();
+                let vignette_factor = base + (1.0 - base) * (distance / max_distance).powf(factor);
+
+                let index = ((y * self.width + x) * 4) as usize;
+                for i in 0..3 {
+                    let value = self.data[index + i] as f32 * vignette_factor;
+                    self.data[index + i] = value.clamp(0.0, 255.0) as u8;
+                }
+            }
+        }
+    }
+
+    pub fn as_image_surface(&self) -> cairo::ImageSurface {
+        let surface = cairo::ImageSurface::create(
+            cairo::Format::ARgb32,
+            self.width as i32,
+            self.height as i32,
+        )
+        .expect("Failed to create image surface");
+
+        // TODO: Properly copy pixel data to surface using cairo API
+        // For now, return empty surface
+        surface
+    }
+}