wayland: implement wp_single_pixel_buffer_manager_v1

src/globals.rs

@@ -22,6 +22,7 @@ use {
             wl_surface::xwayland_shell_v1::XwaylandShellV1Global,
             wp_fractional_scale_manager_v1::WpFractionalScaleManagerV1Global,
             wp_presentation::WpPresentationGlobal,
+            wp_single_pixel_buffer_manager_v1::WpSinglePixelBufferManagerV1Global,
             wp_tearing_control_manager_v1::WpTearingControlManagerV1Global,
             wp_viewporter::WpViewporterGlobal,
             xdg_wm_base::XdgWmBaseGlobal,
@@ -156,6 +157,7 @@ impl Globals {
         add_singleton!(ZwpPointerConstraintsV1Global);
         add_singleton!(XwaylandShellV1Global);
         add_singleton!(WpTearingControlManagerV1Global);
+        add_singleton!(WpSinglePixelBufferManagerV1Global);
     }
 
     pub fn add_backend_singletons(&self, backend: &Rc<dyn Backend>) {

src/ifs.rs

@@ -30,6 +30,7 @@ pub mod wl_surface;
 pub mod wp_fractional_scale_manager_v1;
 pub mod wp_presentation;
 pub mod wp_presentation_feedback;
+pub mod wp_single_pixel_buffer_manager_v1;
 pub mod wp_tearing_control_manager_v1;
 pub mod wp_viewporter;
 pub mod xdg_positioner;

src/ifs/wl_buffer.rs

@@ -2,11 +2,12 @@ use {
     crate::{
         client::{Client, ClientError},
         clientmem::{ClientMem, ClientMemError, ClientMemOffset},
-        format::Format,
+        format::{Format, ARGB8888},
         gfx_api::{GfxError, GfxFramebuffer, GfxImage, GfxTexture},
         leaks::Tracker,
         object::Object,
         rect::Rect,
+        theme::Color,
         utils::{
             buffd::{MsgParser, MsgParserError},
             clonecell::CloneCell,
@@ -26,6 +27,7 @@ use {
 pub enum WlBufferStorage {
     Shm { mem: ClientMemOffset, stride: i32 },
     Dmabuf(Rc<dyn GfxImage>),
+    Color(Color),
 }
 
 pub struct WlBuffer {
@@ -114,6 +116,33 @@ impl WlBuffer {
         })
     }
 
+    pub fn new_single_pixel(
+        id: WlBufferId,
+        client: &Rc<Client>,
+        r: u32,
+        g: u32,
+        b: u32,
+        a: u32,
+    ) -> Self {
+        Self {
+            id,
+            destroyed: Cell::new(false),
+            client: client.clone(),
+            rect: Rect::new_sized(0, 0, 1, 1).unwrap(),
+            format: ARGB8888,
+            dmabuf: None,
+            render_ctx_version: Cell::new(client.state.render_ctx_version.get()),
+            storage: RefCell::new(Some(WlBufferStorage::Color(
+                Color::from_u32_rgba_premultiplied(r, g, b, a),
+            ))),
+            width: 1,
+            height: 1,
+            texture: CloneCell::new(None),
+            tracker: Default::default(),
+            famebuffer: Default::default(),
+        }
+    }
+
     pub fn handle_gfx_context_change(&self) {
         let ctx_version = self.client.state.render_ctx_version.get();
         if self.render_ctx_version.replace(ctx_version) == ctx_version {
@@ -168,6 +197,9 @@ impl WlBuffer {
                     self.texture.set(Some(img.clone().to_texture()?));
                 }
             }
+            WlBufferStorage::Color(_) => {
+                // nothing
+            }
         }
         Ok(())
     }
@@ -187,6 +219,9 @@ impl WlBuffer {
                     self.famebuffer.set(Some(img.clone().to_framebuffer()?));
                 }
             }
+            WlBufferStorage::Color(_) => {
+                // nothing
+            }
         }
         Ok(())
     }

src/ifs/wp_single_pixel_buffer_manager_v1.rs

@@ -0,0 +1,113 @@
+use {
+    crate::{
+        client::{Client, ClientError},
+        globals::{Global, GlobalName},
+        ifs::wl_buffer::WlBuffer,
+        leaks::Tracker,
+        object::Object,
+        utils::buffd::{MsgParser, MsgParserError},
+        wire::{wp_single_pixel_buffer_manager_v1::*, WpSinglePixelBufferManagerV1Id},
+    },
+    std::rc::Rc,
+    thiserror::Error,
+};
+
+pub struct WpSinglePixelBufferManagerV1Global {
+    name: GlobalName,
+}
+
+impl WpSinglePixelBufferManagerV1Global {
+    pub fn new(name: GlobalName) -> Self {
+        Self { name }
+    }
+
+    fn bind_(
+        self: Rc<Self>,
+        id: WpSinglePixelBufferManagerV1Id,
+        client: &Rc<Client>,
+        _version: u32,
+    ) -> Result<(), WpSinglePixelBufferManagerV1Error> {
+        let obj = Rc::new(WpSinglePixelBufferManagerV1 {
+            id,
+            client: client.clone(),
+            tracker: Default::default(),
+        });
+        track!(client, obj);
+        client.add_client_obj(&obj)?;
+        Ok(())
+    }
+}
+
+global_base!(
+    WpSinglePixelBufferManagerV1Global,
+    WpSinglePixelBufferManagerV1,
+    WpSinglePixelBufferManagerV1Error
+);
+
+impl Global for WpSinglePixelBufferManagerV1Global {
+    fn singleton(&self) -> bool {
+        true
+    }
+
+    fn version(&self) -> u32 {
+        1
+    }
+}
+
+simple_add_global!(WpSinglePixelBufferManagerV1Global);
+
+pub struct WpSinglePixelBufferManagerV1 {
+    pub id: WpSinglePixelBufferManagerV1Id,
+    pub client: Rc<Client>,
+    pub tracker: Tracker<Self>,
+}
+
+impl WpSinglePixelBufferManagerV1 {
+    pub fn destroy(
+        &self,
+        parser: MsgParser<'_, '_>,
+    ) -> Result<(), WpSinglePixelBufferManagerV1Error> {
+        let _req: Destroy = self.client.parse(self, parser)?;
+        self.client.remove_obj(self)?;
+        Ok(())
+    }
+
+    pub fn create_u32_rgba_buffer(
+        &self,
+        parser: MsgParser<'_, '_>,
+    ) -> Result<(), WpSinglePixelBufferManagerV1Error> {
+        let req: CreateU32RgbaBuffer = self.client.parse(self, parser)?;
+        let buffer = Rc::new(WlBuffer::new_single_pixel(
+            req.id,
+            &self.client,
+            req.r,
+            req.g,
+            req.b,
+            req.a,
+        ));
+        track!(self.client, buffer);
+        self.client.add_client_obj(&buffer)?;
+        Ok(())
+    }
+}
+
+object_base! {
+    self = WpSinglePixelBufferManagerV1;
+
+    DESTROY => destroy,
+    CREATE_U32_RGBA_BUFFER => create_u32_rgba_buffer,
+}
+
+impl Object for WpSinglePixelBufferManagerV1 {}
+
+simple_add_obj!(WpSinglePixelBufferManagerV1);
+
+#[derive(Debug, Error)]
+pub enum WpSinglePixelBufferManagerV1Error {
+    #[error("Parsing failed")]
+    MsgParserError(#[source] Box<MsgParserError>),
+    #[error(transparent)]
+    ClientError(Box<ClientError>),
+}
+efrom!(WpSinglePixelBufferManagerV1Error, ClientError);
+efrom!(WpSinglePixelBufferManagerV1Error, MsgParserError);

src/renderer.rs

@@ -3,7 +3,7 @@ use {
         format::ARGB8888,
         gfx_api::{BufferPoints, GfxApiOpt},
         ifs::{
-            wl_buffer::WlBuffer,
+            wl_buffer::{WlBuffer, WlBufferStorage},
             wl_callback::WlCallback,
             wl_surface::{
                 xdg_surface::XdgSurface, zwlr_layer_surface_v1::ZwlrLayerSurfaceV1, WlSurface,
@@ -400,6 +400,12 @@ impl Renderer<'_> {
                 max_width,
                 max_height,
             );
+        } else if let Some(WlBufferStorage::Color(color)) = &*buffer.storage.borrow() {
+            if let Some(rect) =
+                Rect::new_sized(x, y, tsize.0.min(max_width), tsize.1.min(max_height))
+            {
+                self.base.fill_boxes(&[rect], color);
+            }
         }
     }
 

src/theme.rs

@@ -51,6 +51,18 @@ impl Color {
         }
     }
 
+    pub fn from_u32_rgba_premultiplied(r: u32, g: u32, b: u32, a: u32) -> Self {
+        fn to_f32(c: u32) -> f32 {
+            ((c as f64) / (u32::MAX as f64)) as f32
+        }
+        Self {
+            r: to_f32(r),
+            g: to_f32(g),
+            b: to_f32(b),
+            a: to_f32(a),
+        }
+    }
+
     pub fn from_rgba_straight(r: u8, g: u8, b: u8, a: u8) -> Self {
         let alpha = to_f32(a);
         Self {

wire/wp_single_pixel_buffer_manager_v1.txt

@@ -0,0 +1,12 @@
+# requests
+
+msg destroy = 0 {
+}
+
+msg create_u32_rgba_buffer = 1 {
+    id: id(wl_buffer),
+    r: u32,
+    g: u32,
+    b: u32,
+    a: u32,
+}