From c9914d6d94bc33cd59e7c071649c6e89498caa07 Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Mon, 25 Jul 2022 21:18:16 -0700
Subject: [PATCH] gpu: add Adapter.hasFeature

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 gpu/TODO-webgpu.h     |  4 ----
 gpu/src/adapter.zig   |  4 ++++
 gpu/src/interface.zig | 14 +++++++++++++-
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index cc0bc15b..ec5348fa 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,9 +1,5 @@
-// WGPU_EXPORT bool wgpuAdapterHasFeature(WGPUAdapter adapter, WGPUFeatureName feature);
-export fn wgpuAdapterHasFeature(adapter: gpu.Adapter, feature: gpu.FeatureName) bool {
-
 // NOTE: descriptor is nullable, see https://bugs.chromium.org/p/dawn/issues/detail?id=1502
 // WGPU_EXPORT void wgpuAdapterRequestDevice(WGPUAdapter adapter, WGPUDeviceDescriptor const * descriptor, WGPURequestDeviceCallback callback, void * userdata);
-export fn wgpuAdapterRequestDevice(adapter: gpu.Adapter, descriptor: ?*const gpu.DeviceDescriptor, callback: gpu.RequestDeviceCallback, userdata: *anyopaque) void {
 
 // WGPU_EXPORT void wgpuAdapterReference(WGPUAdapter adapter);
 export fn wgpuAdapterReference(adapter: gpu.Adapter) void {
diff --git a/gpu/src/adapter.zig b/gpu/src/adapter.zig
index 80d6f295..0280c045 100644
--- a/gpu/src/adapter.zig
+++ b/gpu/src/adapter.zig
@@ -24,6 +24,10 @@ pub const Adapter = *opaque {
     pub inline fn getProperties(adapter: Adapter, properties: *AdapterProperties) void {
         impl.adapterGetProperties(adapter, properties);
     }
+
+    pub inline fn hasFeature(adapter: Adapter, feature: FeatureName) bool {
+        return impl.adapterHasFeature(adapter, feature);
+    }
 };
 
 pub const RequestDeviceCallback = fn (
diff --git a/gpu/src/interface.zig b/gpu/src/interface.zig
index 1e059a8a..8794776a 100644
--- a/gpu/src/interface.zig
+++ b/gpu/src/interface.zig
@@ -23,7 +23,7 @@ pub fn Interface(comptime Impl: type) type {
     assertDecl(Impl, "adapterEnumerateFeatures", fn (adapter: gpu.Adapter, features: ?[*]gpu.FeatureName) callconv(.Inline) usize);
     assertDecl(Impl, "adapterGetLimits", fn (adapter: gpu.Adapter, limits: *gpu.SupportedLimits) callconv(.Inline) bool);
     assertDecl(Impl, "adapterGetProperties", fn (adapter: gpu.Adapter, properties: *gpu.AdapterProperties) callconv(.Inline) void);
-    // assertDecl(Impl, "adapterHasFeature", fn (adapter: gpu.Adapter, feature: gpu.FeatureName) callconv(.Inline) bool);
+    assertDecl(Impl, "adapterHasFeature", fn (adapter: gpu.Adapter, feature: gpu.FeatureName) callconv(.Inline) bool);
     // assertDecl(Impl, "adapterRequestDevice", fn (adapter: gpu.Adapter, descriptor: ?*const gpu.DeviceDescriptor, callback: gpu.RequestDeviceCallback, userdata: *anyopaque) callconv(.Inline) void);
     // assertDecl(Impl, "adapterReference", fn (adapter: gpu.Adapter) callconv(.Inline) void);
     // assertDecl(Impl, "adapterRelease", fn (adapter: gpu.Adapter) callconv(.Inline) void);
@@ -260,6 +260,11 @@ pub fn Export(comptime Impl: type) type {
         export fn wgpuAdapterGetProperties(adapter: gpu.Adapter, properties: *gpu.AdapterProperties) void {
             return Impl.adapterGetProperties(adapter, properties);
         }
+
+        // WGPU_EXPORT bool wgpuAdapterHasFeature(WGPUAdapter adapter, WGPUFeatureName feature);
+        export fn wgpuAdapterHasFeature(adapter: gpu.Adapter, feature: gpu.FeatureName) bool {
+            return Impl.adapterHasFeature(adapter, feature);
+        }
     };
 }
 
@@ -293,10 +298,17 @@ pub const NullInterface = Interface(struct {
         _ = limits;
         return false;
     }
+
     pub inline fn adapterGetProperties(adapter: gpu.Adapter, properties: *gpu.AdapterProperties) void {
         _ = adapter;
         _ = properties;
     }
+
+    pub inline fn adapterHasFeature(adapter: gpu.Adapter, feature: gpu.FeatureName) bool {
+        _ = adapter;
+        _ = feature;
+        return false;
+    }
 });
 
 test "null" {