gpu: implement Queue.writeBuffer

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu/src/NativeInstance.zig

@@ -909,6 +909,17 @@ const queue_vtable = Queue.VTable{
             );
         }
     }).submit,
+    .writeBuffer = (struct {
+        pub fn writeBuffer(ptr: *anyopaque, buffer: Buffer, buffer_offset: u64, data: *const anyopaque, size: u64) void {
+            c.wgpuQueueWriteBuffer(
+                @ptrCast(c.WGPUQueue, ptr),
+                @ptrCast(c.WGPUBuffer, buffer.ptr),
+                buffer_offset,
+                data,
+                size,
+            );
+        }
+    }).writeBuffer,
 };
 
 fn wrapShaderModule(shader_module: c.WGPUShaderModule) ShaderModule {

gpu/src/Queue.zig

@@ -1,4 +1,5 @@
 const CommandBuffer = @import("CommandBuffer.zig");
+const Buffer = @import("Buffer.zig");
 
 const Queue = @This();
 
@@ -15,8 +16,8 @@ pub const VTable = struct {
     // TODO: dawn specific?
     // copyTextureForBrowser: fn (ptr: *anyopaque, source: *const ImageCopyTexture, destination: *const ImageCopyTexture, copy_size: *const Extent3D, options: *const CopyTextureForBrowserOptions) void,
     submit: fn (queue: Queue, commands: []const CommandBuffer) void,
+    writeBuffer: fn (ptr: *anyopaque, buffer: Buffer, buffer_offset: u64, data: *const anyopaque, size: u64) void,
     // TODO(implement):
-    // writeBuffer: fn (ptr: *anyopaque, buffer: Buffer, buffer_offset: u64, data: *const anyopaque, size: usize);
     // writeTexture: fn (ptr: *anyopaque, destination: *const ImageCopyTexture, data: *const anyopaque, data_size: usize, data_layout: *const TextureDataLayout, write_size: *const Extent3D);
 };
 
@@ -32,6 +33,10 @@ pub inline fn submit(queue: Queue, commands: []const CommandBuffer) void {
     queue.vtable.submit(queue, commands);
 }
 
+pub inline fn writeBuffer(queue: Queue, buffer: Buffer, buffer_offset: u64, data: anytype) void {
+    queue.vtable.writeBuffer(queue.ptr, buffer, buffer_offset, @ptrCast(*const anyopaque, &data[0]), @intCast(u64, data.len));
+}
+
 pub const WorkDoneCallback = struct {
     type_erased_ctx: *anyopaque,
     type_erased_callback: fn (ctx: *anyopaque, status: WorkDoneStatus) callconv(.Inline) void,
@@ -67,6 +72,7 @@ test {
     _ = reference;
     _ = release;
     _ = submit;
+    _ = writeBuffer;
     _ = WorkDoneCallback;
     _ = WorkDoneStatus;
 }