Move some trait bounds to definition of AsGlowRenderer

Everything implementing `AsGlowRenderer` implements `Renderer` and various
other traits, and by making `AsGlowRenderer` depend on these trait,
things requiring `AsGlowRenderer` can avoid listing those traits as
well.

Looks like implied trait bounds still won't work for the
`Self::TexutureId` and `Self::Error` requirements? So those are not
included here.

src/backend/render/element.rs

@@ -1,19 +1,22 @@
 use crate::shell::{CosmicMappedRenderElement, WorkspaceRenderElement};
 
 #[cfg(feature = "debug")]
-use smithay::backend::renderer::{element::texture::TextureRenderElement, gles::GlesTexture};
+use smithay::backend::renderer::element::texture::TextureRenderElement;
 use smithay::{
-    backend::renderer::{
-        ImportAll, ImportMem, Renderer,
-        element::{
-            Element, Id, Kind, RenderElement, UnderlyingStorage,
-            memory::MemoryRenderBufferRenderElement,
-            surface::WaylandSurfaceRenderElement,
-            utils::{CropRenderElement, Relocate, RelocateRenderElement, RescaleRenderElement},
+    backend::{
+        allocator::dmabuf::Dmabuf,
+        renderer::{
+            Bind, Blit, ExportMem, ImportAll, ImportMem, Offscreen, Renderer,
+            element::{
+                Element, Id, Kind, RenderElement, UnderlyingStorage,
+                memory::MemoryRenderBufferRenderElement,
+                surface::WaylandSurfaceRenderElement,
+                utils::{CropRenderElement, Relocate, RelocateRenderElement, RescaleRenderElement},
+            },
+            gles::{GlesError, GlesRenderbuffer, GlesTexture, element::TextureShaderElement},
+            glow::{GlowFrame, GlowRenderer},
+            utils::{CommitCounter, DamageSet, OpaqueRegions},
         },
-        gles::{GlesError, element::TextureShaderElement},
-        glow::{GlowFrame, GlowRenderer},
-        utils::{CommitCounter, DamageSet, OpaqueRegions},
     },
     utils::{Buffer as BufferCoords, Logical, Physical, Point, Rectangle, Scale},
 };
@@ -22,7 +25,7 @@ use super::{GlMultiRenderer, cursor::CursorRenderElement};
 
 pub enum CosmicElement<R>
 where
-    R: AsGlowRenderer + Renderer + ImportAll + ImportMem,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -42,7 +45,7 @@ where
 
 impl<R> Element for CosmicElement<R>
 where
-    R: AsGlowRenderer + Renderer + ImportAll + ImportMem,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -183,7 +186,7 @@ where
 
 impl<R> RenderElement<R> for CosmicElement<R>
 where
-    R: AsGlowRenderer + Renderer + ImportAll + ImportMem,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     R::Error: FromGlesError,
     CosmicMappedRenderElement<R>: RenderElement<R>,
@@ -253,7 +256,7 @@ where
 impl<R> From<CropRenderElement<RescaleRenderElement<WorkspaceRenderElement<R>>>>
     for CosmicElement<R>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -268,7 +271,7 @@ where
 
 impl<R> From<MemoryRenderBufferRenderElement<R>> for CosmicElement<R>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -280,7 +283,7 @@ where
 #[cfg(feature = "debug")]
 impl<R> From<TextureRenderElement<GlesTexture>> for CosmicElement<R>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -289,9 +292,15 @@ where
     }
 }
 
-pub trait AsGlowRenderer
-where
-    Self: Renderer,
+pub trait AsGlowRenderer:
+    Renderer
+    + Offscreen<GlesTexture>
+    + Offscreen<GlesRenderbuffer>
+    + ImportAll
+    + ImportMem
+    + ExportMem
+    + Bind<Dmabuf>
+    + Blit
 {
     fn glow_renderer(&self) -> &GlowRenderer;
     fn glow_renderer_mut(&mut self) -> &mut GlowRenderer;

src/backend/render/mod.rs

@@ -45,11 +45,10 @@ use cosmic::Theme;
 use element::FromGlesError;
 use smithay::{
     backend::{
-        allocator::{Fourcc, dmabuf::Dmabuf},
+        allocator::Fourcc,
         drm::{DrmDeviceFd, DrmNode},
         renderer::{
-            Bind, Blit, Color32F, ExportMem, ImportAll, ImportMem, Offscreen, Renderer, Texture,
-            TextureFilter,
+            Color32F, ImportAll, Offscreen, Renderer, Texture, TextureFilter,
             damage::{Error as RenderError, OutputDamageTracker, RenderOutputResult},
             element::{
                 Element, Id, Kind, RenderElement, WeakId,
@@ -478,7 +477,7 @@ pub fn cursor_elements<'a, 'frame, R>(
     exclude_dnd_icon: bool,
 ) -> Vec<CosmicElement<R>>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: Send + Clone + 'static,
     CosmicMappedRenderElement<R>: RenderElement<R>,
 {
@@ -620,7 +619,7 @@ pub fn output_elements<R>(
     _fps: Option<(&EguiState, &Timings)>,
 ) -> Result<Vec<CosmicElement<R>>, RenderError<R::Error>>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: Send + Clone + 'static,
     R::Error: FromGlesError,
     CosmicMappedRenderElement<R>: RenderElement<R>,
@@ -718,7 +717,7 @@ pub fn workspace_elements<R>(
     element_filter: ElementFilter,
 ) -> Result<Vec<CosmicElement<R>>, RenderError<R::Error>>
 where
-    R: Renderer + ImportAll + ImportMem + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: Send + Clone + 'static,
     R::Error: FromGlesError,
     CosmicMappedRenderElement<R>: RenderElement<R>,
@@ -1060,7 +1059,7 @@ pub struct PostprocessState {
 }
 
 impl PostprocessState {
-    pub fn new_with_renderer<R: AsGlowRenderer + Offscreen<GlesTexture>>(
+    pub fn new_with_renderer<R: AsGlowRenderer>(
         renderer: &mut R,
         format: Fourcc,
         output_config: PostprocessOutputConfig,
@@ -1091,7 +1090,7 @@ impl PostprocessState {
         })
     }
 
-    pub fn track_cursor<R: AsGlowRenderer + Offscreen<GlesTexture>>(
+    pub fn track_cursor<R: AsGlowRenderer>(
         &mut self,
         renderer: &mut R,
         format: Fourcc,
@@ -1193,14 +1192,7 @@ pub fn render_output<'d, R>(
     loop_handle: &calloop::LoopHandle<'static, State>,
 ) -> Result<RenderOutputResult<'d>, RenderError<R::Error>>
 where
-    R: Renderer
-        + ImportAll
-        + ImportMem
-        + ExportMem
-        + Bind<Dmabuf>
-        + Offscreen<GlesTexture>
-        + Blit
-        + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: Send + Clone + 'static,
     R::Error: FromGlesError,
     CosmicElement<R>: RenderElement<R>,
@@ -1505,7 +1497,7 @@ pub fn render_workspace<'d, R>(
     element_filter: ElementFilter,
 ) -> Result<(RenderOutputResult<'d>, Vec<CosmicElement<R>>), RenderError<R::Error>>
 where
-    R: Renderer + ImportAll + ImportMem + ExportMem + Bind<Dmabuf> + AsGlowRenderer,
+    R: AsGlowRenderer,
     R::TextureId: Send + Clone + 'static,
     R::Error: FromGlesError,
     CosmicElement<R>: RenderElement<R>,