1 files changed, 59 insertions, 0 deletions
diff --git a/vendor/zgui/src/backend_dx12.zig b/vendor/zgui/src/backend_dx12.zig
new file mode 100644
index 0000000..22672e7
--- /dev/null
+++ b/vendor/zgui/src/backend_dx12.zig
@@ -0,0 +1,59 @@
+pub const D3D12_CPU_DESCRIPTOR_HANDLE = extern struct {
+    ptr: c_ulonglong,
+};
+
+pub const D3D12_GPU_DESCRIPTOR_HANDLE = extern struct {
+    ptr: c_ulonglong,
+};
+
+pub fn init(
+    device: *const anyopaque, // ID3D12Device
+    num_frames_in_flight: u32,
+    rtv_format: c_uint, // DXGI_FORMAT
+    cbv_srv_heap: *const anyopaque, // ID3D12DescriptorHeap
+    font_srv_cpu_desc_handle: D3D12_CPU_DESCRIPTOR_HANDLE,
+    font_srv_gpu_desc_handle: D3D12_GPU_DESCRIPTOR_HANDLE,
+) void {
+    if (!ImGui_ImplDX12_Init(
+        device,
+        num_frames_in_flight,
+        rtv_format,
+        cbv_srv_heap,
+        font_srv_cpu_desc_handle,
+        font_srv_gpu_desc_handle,
+    )) {
+        @panic("failed to init d3d12 for imgui");
+    }
+}
+
+pub fn deinit() void {
+    ImGui_ImplDX12_Shutdown();
+}
+
+pub fn newFrame() void {
+    ImGui_ImplDX12_NewFrame();
+}
+
+pub fn render(
+    draw_data: *const anyopaque, // *gui.DrawData
+    gfx_command_list: *const anyopaque, // *ID3D12GraphicsCommandList
+) void {
+    ImGui_ImplDX12_RenderDrawData(draw_data, gfx_command_list);
+}
+
+// Those functions are defined in 'imgui_impl_dx12.cpp`
+// (they include few custom changes).
+extern fn ImGui_ImplDX12_Init(
+    device: *const anyopaque, // ID3D12Device
+    num_frames_in_flight: u32,
+    rtv_format: u32, // DXGI_FORMAT
+    cbv_srv_heap: *const anyopaque, // ID3D12DescriptorHeap
+    font_srv_cpu_desc_handle: D3D12_CPU_DESCRIPTOR_HANDLE,
+    font_srv_gpu_desc_handle: D3D12_GPU_DESCRIPTOR_HANDLE,
+) bool;
+extern fn ImGui_ImplDX12_Shutdown() void;
+extern fn ImGui_ImplDX12_NewFrame() void;
+extern fn ImGui_ImplDX12_RenderDrawData(
+    draw_data: *const anyopaque, // *ImDrawData
+    graphics_command_list: *const anyopaque, // *ID3D12GraphicsCommandList
+) void;