fix: I find out a smart way to fix scale problem

libwayshot/src/dispatch.rs

@@ -37,6 +37,10 @@ use wayland_protocols_wlr::screencopy::v1::client::{
  zwlr_screencopy_manager_v1::ZwlrScreencopyManagerV1,
 };
 
+use wayland_protocols::wp::viewporter::client::{
+ wp_viewport::WpViewport, wp_viewporter::WpViewporter,
+};
+
 use crate::{
  output::OutputInfo,
  region::{LogicalRegion, Position, Size},
@@ -299,6 +303,8 @@ delegate_noop!(LayerShellState: ignore WlShmPool);
 delegate_noop!(LayerShellState: ignore WlBuffer);
 delegate_noop!(LayerShellState: ignore ZwlrLayerShellV1);
 delegate_noop!(LayerShellState: ignore WlSurface);
+delegate_noop!(LayerShellState: ignore WpViewport);
+delegate_noop!(LayerShellState: ignore WpViewporter);
 
 impl wayland_client::Dispatch<ZwlrLayerSurfaceV1, WlOutput> for LayerShellState {
  // No need to instrument here, span from lib.rs is automatically used.

libwayshot/src/lib.rs

@@ -37,8 +37,11 @@ use wayland_client::{
  Connection, EventQueue, Proxy,
 };
 use wayland_protocols::{
- wp::linux_dmabuf::zv1::client::{
- zwp_linux_buffer_params_v1, zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1,
+ wp::{
+ linux_dmabuf::zv1::client::{
+ zwp_linux_buffer_params_v1, zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1,
+ },
+ viewporter::client::wp_viewporter::WpViewporter,
  },
  xdg::xdg_output::zv1::client::{
  zxdg_output_manager_v1::ZxdgOutputManagerV1, zxdg_output_v1::ZxdgOutputV1,
@@ -832,6 +835,12 @@ impl WayshotConnection {
  ));
  }
  };
+ let viewporter = self.globals.bind::<WpViewporter, _, _>(&qh, 1..=1, ()).ok();
+ if viewporter.is_none() {
+ tracing::info!(
+ "Compositor does not support wp_viewporter, display scaling may be inaccurate."
+ );
+ }
 
  let mut layer_shell_surfaces = Vec::with_capacity(frames.len());
 
@@ -872,6 +881,14 @@ impl WayshotConnection {
  // surface.set_buffer_scale(output_info.scale());
  surface.attach(Some(&frame_guard.buffer), 0, 0);
 
+ if let Some(viewporter) = viewporter.as_ref() {
+ let viewport = viewporter.get_viewport(&surface, &qh, ());
+ viewport.set_destination(
+ output_info.logical_region.inner.size.width as i32,
+ output_info.logical_region.inner.size.height as i32,
+ );
+ }
+
  debug!("Committing surface with attached buffer.");
  surface.commit();
  layer_shell_surfaces.push((surface, layer_surface));