1 files changed, 214 insertions, 0 deletions
diff --git a/gfx/wgpu_bindings/src/identity.rs b/gfx/wgpu_bindings/src/identity.rs
new file mode 100644
index 0000000000..38c8930c76
--- /dev/null
+++ b/gfx/wgpu_bindings/src/identity.rs
@@ -0,0 +1,214 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use wgc::id;
+
+pub type FactoryParam = *mut std::ffi::c_void;
+
+#[derive(Debug)]
+pub struct IdentityRecycler<I> {
+    fun: extern "C" fn(I, FactoryParam),
+    param: FactoryParam,
+    kind: &'static str,
+}
+
+impl<I: id::TypedId + Clone + std::fmt::Debug> wgc::hub::IdentityHandler<I>
+    for IdentityRecycler<I>
+{
+    type Input = I;
+    fn process(&self, id: I, _backend: wgt::Backend) -> I {
+        log::debug!("process {} {:?}", self.kind, id);
+        //debug_assert_eq!(id.unzip().2, backend);
+        id
+    }
+    fn free(&self, id: I) {
+        log::debug!("free {} {:?}", self.kind, id);
+        (self.fun)(id, self.param);
+    }
+}
+
+//TODO: remove this in favor of `DropAction` that could be sent over IPC.
+#[repr(C)]
+pub struct IdentityRecyclerFactory {
+    param: FactoryParam,
+    free_adapter: extern "C" fn(id::AdapterId, FactoryParam),
+    free_device: extern "C" fn(id::DeviceId, FactoryParam),
+    free_swap_chain: extern "C" fn(id::SwapChainId, FactoryParam),
+    free_pipeline_layout: extern "C" fn(id::PipelineLayoutId, FactoryParam),
+    free_shader_module: extern "C" fn(id::ShaderModuleId, FactoryParam),
+    free_bind_group_layout: extern "C" fn(id::BindGroupLayoutId, FactoryParam),
+    free_bind_group: extern "C" fn(id::BindGroupId, FactoryParam),
+    free_command_buffer: extern "C" fn(id::CommandBufferId, FactoryParam),
+    free_render_bundle: extern "C" fn(id::RenderBundleId, FactoryParam),
+    free_render_pipeline: extern "C" fn(id::RenderPipelineId, FactoryParam),
+    free_compute_pipeline: extern "C" fn(id::ComputePipelineId, FactoryParam),
+    free_buffer: extern "C" fn(id::BufferId, FactoryParam),
+    free_texture: extern "C" fn(id::TextureId, FactoryParam),
+    free_texture_view: extern "C" fn(id::TextureViewId, FactoryParam),
+    free_sampler: extern "C" fn(id::SamplerId, FactoryParam),
+    free_surface: extern "C" fn(id::SurfaceId, FactoryParam),
+}
+
+impl wgc::hub::IdentityHandlerFactory<id::AdapterId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::AdapterId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_adapter,
+            param: self.param,
+            kind: "adapter",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::DeviceId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::DeviceId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_device,
+            param: self.param,
+            kind: "device",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::SwapChainId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::SwapChainId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_swap_chain,
+            param: self.param,
+            kind: "swap_chain",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::PipelineLayoutId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::PipelineLayoutId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_pipeline_layout,
+            param: self.param,
+            kind: "pipeline_layout",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::ShaderModuleId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::ShaderModuleId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_shader_module,
+            param: self.param,
+            kind: "shader_module",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::BindGroupLayoutId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::BindGroupLayoutId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_bind_group_layout,
+            param: self.param,
+            kind: "bind_group_layout",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::BindGroupId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::BindGroupId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_bind_group,
+            param: self.param,
+            kind: "bind_group",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::CommandBufferId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::CommandBufferId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_command_buffer,
+            param: self.param,
+            kind: "command_buffer",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::RenderBundleId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::RenderBundleId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_render_bundle,
+            param: self.param,
+            kind: "render_bundle",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::RenderPipelineId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::RenderPipelineId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_render_pipeline,
+            param: self.param,
+            kind: "render_pipeline",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::ComputePipelineId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::ComputePipelineId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_compute_pipeline,
+            param: self.param,
+            kind: "compute_pipeline",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::BufferId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::BufferId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_buffer,
+            param: self.param,
+            kind: "buffer",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::TextureId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::TextureId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_texture,
+            param: self.param,
+            kind: "texture",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::TextureViewId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::TextureViewId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_texture_view,
+            param: self.param,
+            kind: "texture_view",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::SamplerId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::SamplerId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_sampler,
+            param: self.param,
+            kind: "sampler",
+        }
+    }
+}
+impl wgc::hub::IdentityHandlerFactory<id::SurfaceId> for IdentityRecyclerFactory {
+    type Filter = IdentityRecycler<id::SurfaceId>;
+    fn spawn(&self, _min_index: u32) -> Self::Filter {
+        IdentityRecycler {
+            fun: self.free_surface,
+            param: self.param,
+            kind: "surface",
+        }
+    }
+}
+
+impl wgc::hub::GlobalIdentityHandlerFactory for IdentityRecyclerFactory {}