David Allemang
d955ccf17d
git-subtree-dir: glfw-vulkan git-subtree-mainline:df6751f276git-subtree-split:ce8109c1aa
111 lines
3.5 KiB
Zig
111 lines
3.5 KiB
Zig
//! all imgui code through this path
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const std = @import("std");
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const vk = @import("vk");
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const nu = @import("../nu.zig");
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const Render = @import("Render.zig");
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const Window = @import("Window.zig");
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const im = @import("cimgui");
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pub usingnamespace im;
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pub const Config = struct {};
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const config = nu.config.imgui;
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pub const depends = .{ Render, Window };
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pub fn loader_wrapper(procname: [*c]const u8, _: ?*anyopaque) callconv(.C) vk.PfnVoidFunction {
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return Render.ctx.glfwGetInstanceProcAddress(Render.ctx.instance.*, procname);
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}
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var ctx: *im.ImGuiContext = undefined;
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var descriptor_pool: vk.DescriptorPool = undefined;
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pub fn setup(_: std.mem.Allocator) !void {
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ctx = im.igCreateContext(null) orelse {
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return error.igCreateContextFailed;
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};
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errdefer im.igDestroyContext(ctx);
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if (!im.impl.ImGui_ImplVulkan_LoadFunctions(loader_wrapper, null)) {
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return error.igVulkanLoadFunctionsFailed;
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}
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if (!im.impl.ImGui_ImplGlfw_InitForVulkan(@ptrCast(Window.handle), true)) {
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return error.igGlfwInitFailed;
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}
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errdefer im.impl.ImGui_ImplGlfw_Shutdown();
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descriptor_pool = try Render.ctx.D.createDescriptorPool(
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&vk.DescriptorPoolCreateInfo{
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.flags = .{ .free_descriptor_set_bit = true },
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.pool_size_count = 1,
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.p_pool_sizes = &.{vk.DescriptorPoolSize{
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.descriptor_count = 32,
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.type = .combined_image_sampler,
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}},
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.max_sets = 32,
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},
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null,
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);
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errdefer Render.ctx.D.destroyDescriptorPool(descriptor_pool, null);
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if (im.impl.ImGui_ImplVulkan_Init(@constCast(&im.impl.ImGui_ImplVulkan_InitInfo{
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.Instance = @ptrFromInt(@intFromEnum(Render.ctx.instance.*)),
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.PhysicalDevice = @ptrFromInt(@intFromEnum(Render.ctx.pdevice.*)),
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.Device = @ptrFromInt(@intFromEnum(Render.ctx.device.*)),
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.QueueFamily = Render.ctx.family.*, // todo
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.Queue = @ptrFromInt(@intFromEnum(Render.ctx.Q.handle)), // todo
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.DescriptorPool = @ptrFromInt(@intFromEnum(descriptor_pool)),
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.RenderPass = null,
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.MinImageCount = 2,
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.ImageCount = @intCast(Render.sc.frames_in_flight),
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.PipelineRenderingCreateInfo = @bitCast(vk.PipelineRenderingCreateInfo{
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.view_mask = 0,
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.depth_attachment_format = .undefined,
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.stencil_attachment_format = .undefined,
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.color_attachment_count = 1,
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.p_color_attachment_formats = &.{Render.sc.cinfo.image_format}, // todo
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}),
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.MSAASamples = 0,
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.PipelineCache = null,
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.Subpass = 0,
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.UseDynamicRendering = true,
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.Allocator = null,
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})) != true) {
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return error.igVulkanInitFailed;
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}
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errdefer im.impl.ImGui_ImplVulkan_Shutdown();
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if (!im.impl.ImGui_ImplVulkan_CreateFontsTexture()) {
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return error.igVulkanFontTextureFailed;
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}
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}
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pub fn teardown() void {
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Render.ctx.D.deviceWaitIdle() catch |err| std.debug.panic("Device wait failed: {!}", .{err});
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im.impl.ImGui_ImplVulkan_Shutdown();
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Render.ctx.D.destroyDescriptorPool(descriptor_pool, null);
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im.impl.ImGui_ImplGlfw_Shutdown();
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im.igDestroyContext(ctx);
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}
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pub fn frame() !void {
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im.impl.ImGui_ImplGlfw_NewFrame();
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im.impl.ImGui_ImplVulkan_NewFrame();
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im.igNewFrame();
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}
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pub fn rpresent(cmd: Render.ctx.CommandBufferProxy) void { // todo
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im.igEndFrame();
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im.igRender();
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im.impl.ImGui_ImplVulkan_RenderDrawData(
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@ptrCast(im.igGetDrawData()),
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@ptrFromInt(@intFromEnum(cmd.handle)),
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null,
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);
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}
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