aaah backgrounds

src/main.rs

@@ -1,5 +1,8 @@
 extern crate xcb;
 
+// use std::fs::File;
+// use std::io::Write;
+
 fn main() {
     let (conn, screen_num) = xcb::Connection::connect(None).unwrap();
     let setup = conn.get_setup();
@@ -7,8 +10,40 @@ fn main() {
 
     let window = conn.generate_id();
 
+    let width = screen.width_in_pixels();
+    let height = screen.height_in_pixels();
+
+    println!("width {} height {}", width, height);
+
+    let screenshot = xcb::get_image(
+        &conn,
+        xcb::IMAGE_FORMAT_Z_PIXMAP as u8,
+        screen.root(),
+        0,
+        0,
+        width,
+        height,
+        0xFF_FF_FF_FF_u32,
+    ).get_reply()
+    .unwrap();
+
+    // let mut buf = File::create("out.bin").unwrap();
+    // buf.write(screenshot.data()).unwrap();
+
+    let bg = conn.generate_id();
+    xcb::create_pixmap(
+        &conn,
+        xcb::COPY_FROM_PARENT as u8,
+        bg,
+        screenshot,
+        width,
+        height,
+    );
+
     let values = [
-        (xcb::CW_BACK_PIXEL, screen.white_pixel()),
+        // ?RGB. First 4 bytes appear to do nothing
+        (xcb::CW_BACK_PIXEL, 0x00_00_00_00),
+        // (xcb::CW_BACK_PIXMAP, bg),
         (
             xcb::CW_EVENT_MASK,
             xcb::EVENT_MASK_EXPOSURE
@@ -16,6 +51,7 @@ fn main() {
                 | xcb::EVENT_MASK_BUTTON_PRESS
                 | xcb::EVENT_MASK_BUTTON_RELEASE,
         ),
+        (xcb::CW_OVERRIDE_REDIRECT, 1 as u32), // Don't be window managed
     ];
 
     xcb::create_window(
@@ -25,17 +61,47 @@ fn main() {
         screen.root(),
         0,
         0,
-        150,
-        150,
-        10,
+        width / 2,
+        height / 2,
+        0,
         xcb::WINDOW_CLASS_INPUT_OUTPUT as u16,
         screen.root_visual(),
         &values,
     );
 
+    // // Set transparency.
+    // let opacity_atom = xcb::intern_atom(&conn, false, "_NET_WM_WINDOW_OPACITY")
+    //     .get_reply()
+    //     .expect("Couldn't create atom _NET_WM_WINDOW_OPACITY")
+    //     .atom();
+    // // let opacity = u32::max_value();
+    // let opacity = 0;
+    // xcb::change_property(
+    //     &conn,
+    //     xcb::PROP_MODE_REPLACE as u8,
+    //     window,
+    //     opacity_atom,
+    //     xcb::ATOM_CARDINAL,
+    //     32,
+    //     &[opacity],
+    // );
+
     xcb::map_window(&conn, window);
 
+    let title = "hacksaw";
+    // setting title
+    xcb::change_property(
+        &conn,
+        xcb::PROP_MODE_REPLACE as u8,
+        window,
+        xcb::ATOM_WM_NAME,
+        xcb::ATOM_STRING,
+        8,
+        title.as_bytes(),
+    );
+
     conn.flush();
+
     loop {
         let ev = conn.wait_for_event();
         match ev {
@@ -63,4 +129,29 @@ fn main() {
             }
         };
     }
+    // Now we have taken coordinates, we use them
 }
+
+// let vinfo: xcb::XVisualInfo;
+// unsafe {
+//     xcb::XMatchVisualInfo(conn.get_raw_dpy(), screen_num, 32, xcb::Truecolor, &vinfo);
+// }
+
+// int main(int argc, char* argv[])
+// {
+//     Display* display = XOpenDisplay(NULL);
+
+//     XVisualInfo vinfo;
+//     XMatchVisualInfo(display, DefaultScreen(display), 32, TrueColor, &vinfo);
+
+//     XSetWindowAttributes attr;
+//     attr.colormap = XCreateColormap(display, DefaultRootWindow(display), vinfo.visual, AllocNone);
+//     attr.border_pixel = 0;
+//     attr.background_pixel = 0;
+
+//     Window win = XCreateWindow(display, DefaultRootWindow(display), 0, 0, 300, 200, 0, vinfo.depth, InputOutput, vinfo.visual, CWColormap | CWBorderPixel | CWBackPixel, &attr);
+
+//     XDestroyWindow(display, win);
+//     XCloseDisplay(display);
+//     return 0;
+// }