From 7e54d9b4ae0aa801a1e5afb04674221fa833bf03 Mon Sep 17 00:00:00 2001
From: Stephen Gutekanst <stephen@hexops.com>
Date: Tue, 15 Mar 2022 21:21:33 -0700
Subject: [PATCH] gpu: implement RenderPipeline.getBindGroupLayout

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
---
 gpu/src/NativeInstance.zig |  8 ++++++++
 gpu/src/RenderPipeline.zig | 10 ++++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/gpu/src/NativeInstance.zig b/gpu/src/NativeInstance.zig
index df81751b..9c358786 100644
--- a/gpu/src/NativeInstance.zig
+++ b/gpu/src/NativeInstance.zig
@@ -855,6 +855,14 @@ const render_pipeline_vtable = RenderPipeline.VTable{
             c.wgpuRenderPipelineSetLabel(@ptrCast(c.WGPURenderPipeline, ptr), label);
         }
     }).setLabel,
+    .getBindGroupLayout = (struct {
+        pub fn getBindGroupLayout(ptr: *anyopaque, group_index: u32) BindGroupLayout {
+            return wrapBindGroupLayout(c.wgpuRenderPipelineGetBindGroupLayout(
+                @ptrCast(c.WGPURenderPipeline, ptr),
+                group_index,
+            ));
+        }
+    }).getBindGroupLayout,
 };
 
 fn wrapRenderPassEncoder(pass: c.WGPURenderPassEncoder) RenderPassEncoder {
diff --git a/gpu/src/RenderPipeline.zig b/gpu/src/RenderPipeline.zig
index 9b7297ea..facac1c9 100644
--- a/gpu/src/RenderPipeline.zig
+++ b/gpu/src/RenderPipeline.zig
@@ -4,6 +4,7 @@ const PrimitiveState = @import("structs.zig").PrimitiveState;
 const DepthStencilState = @import("structs.zig").DepthStencilState;
 const MultisampleState = @import("structs.zig").MultisampleState;
 const FragmentState = @import("structs.zig").FragmentState;
+const BindGroupLayout = @import("BindGroupLayout.zig");
 
 const RenderPipeline = @This();
 
@@ -15,9 +16,8 @@ vtable: *const VTable,
 pub const VTable = struct {
     reference: fn (ptr: *anyopaque) void,
     release: fn (ptr: *anyopaque) void,
-    // TODO:
-    // WGPU_EXPORT WGPUBindGroupLayout wgpuRenderPipelineGetBindGroupLayout(WGPURenderPipeline renderPipeline, uint32_t groupIndex);
     setLabel: fn (ptr: *anyopaque, label: [:0]const u8) void,
+    getBindGroupLayout: fn (ptr: *anyopaque, group_index: u32) BindGroupLayout,
 };
 
 pub inline fn reference(pipeline: RenderPipeline) void {
@@ -32,6 +32,10 @@ pub inline fn setLabel(pipeline: RenderPipeline, label: [:0]const u8) void {
     pipeline.vtable.setLabel(pipeline.ptr, label);
 }
 
+pub inline fn getBindGroupLayout(pipeline: RenderPipeline, group_index: u32) BindGroupLayout {
+    return pipeline.vtable.getBindGroupLayout(pipeline.ptr, group_index);
+}
+
 pub const Descriptor = struct {
     label: ?[*:0]const u8 = null,
     layout: ?PipelineLayout,
@@ -96,6 +100,8 @@ test "syntax" {
     _ = VTable;
     _ = reference;
     _ = release;
+    _ = setLabel;
+    _ = getBindGroupLayout;
     _ = Descriptor;
     _ = CreateStatus;
     _ = CreateCallback;