55 lines
1.9 KiB
Zig
55 lines
1.9 KiB
Zig
const gui = @import("gui.zig");
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// This call will install GLFW callbacks to handle GUI interactions.
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// Those callbacks will chain-call user's previously installed callbacks, if any.
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// This means that custom user's callbacks need to be installed *before* calling zgpu.gui.init().
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pub fn init(
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window: *const anyopaque, // zglfw.Window
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wgpu_device: *const anyopaque, // WGPUDevice
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wgpu_swap_chain_format: u32, // WGPUTextureFormat
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wgpu_depth_format: u32, // WGPUTextureFormat
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) void {
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if (!ImGui_ImplGlfw_InitForOther(window, true)) {
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unreachable;
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}
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if (!ImGui_ImplWGPU_Init(wgpu_device, 1, wgpu_swap_chain_format, wgpu_depth_format)) {
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unreachable;
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}
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}
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pub fn deinit() void {
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ImGui_ImplWGPU_Shutdown();
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ImGui_ImplGlfw_Shutdown();
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}
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pub fn newFrame(fb_width: u32, fb_height: u32) void {
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ImGui_ImplWGPU_NewFrame();
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ImGui_ImplGlfw_NewFrame();
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gui.io.setDisplaySize(@as(f32, @floatFromInt(fb_width)), @as(f32, @floatFromInt(fb_height)));
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gui.io.setDisplayFramebufferScale(1.0, 1.0);
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gui.newFrame();
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}
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pub fn draw(wgpu_render_pass: *const anyopaque) void {
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gui.render();
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ImGui_ImplWGPU_RenderDrawData(gui.getDrawData(), wgpu_render_pass);
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}
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// Those functions are defined in `imgui_impl_glfw.cpp` and 'imgui_impl_wgpu.cpp`
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// (they include few custom changes).
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extern fn ImGui_ImplGlfw_InitForOther(window: *const anyopaque, install_callbacks: bool) bool;
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extern fn ImGui_ImplGlfw_NewFrame() void;
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extern fn ImGui_ImplGlfw_Shutdown() void;
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extern fn ImGui_ImplWGPU_Init(
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device: *const anyopaque, // WGPUDevice
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num_frames_in_flight: u32,
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rt_format: u32, // WGPUTextureFormat
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wgpu_depth_format: u32, // WGPUTextureFormat
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) bool;
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extern fn ImGui_ImplWGPU_NewFrame() void;
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extern fn ImGui_ImplWGPU_RenderDrawData(draw_data: *const anyopaque, pass_encoder: *const anyopaque) void;
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extern fn ImGui_ImplWGPU_Shutdown() void;
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