Add vendor:wgpu

vendor/wgpu/wgpu_js.odin

@@ -0,0 +1,26 @@
+package wgpu
+
+import "base:runtime"
+
+g_context: runtime.Context
+
+@(private="file", init)
+wgpu_init_allocator :: proc() {
+	if g_context.allocator.procedure == nil {
+		g_context = runtime.default_context()
+	}
+}
+
+@(private="file", export)
+wgpu_alloc :: proc "contextless" (size: i32) -> [^]byte {
+	context = g_context
+	bytes, err := runtime.mem_alloc(int(size), 16)
+	assert(err == nil, "wgpu_alloc failed")
+	return raw_data(bytes)
+}
+
+@(private="file", export)
+wgpu_free :: proc "contextless" (ptr: rawptr) {
+	context = g_context
+	assert(free(ptr) == nil, "wgpu_free failed")
+}