121 lines
4.4 KiB
Zig
121 lines
4.4 KiB
Zig
const std = @import("std");
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const Step = std.build.Step;
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const Builder = std.build.Builder;
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const pkgs = @import("deps.zig").pkgs;
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const build_pkgs = @import("deps.zig").build_pkgs;
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const build_glfw = build_pkgs.build_glfw;
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const build_vma = build_pkgs.build_vma;
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const build_imgui = build_pkgs.build_imgui;
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const vkgen = build_pkgs.build_vulkan;
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pub const ResourceGenStep = struct {
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step: Step,
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shader_step: *vkgen.ShaderCompileStep,
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builder: *Builder,
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package: std.build.Pkg,
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output_file: std.build.GeneratedFile,
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resources: std.ArrayList(u8),
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pub fn init(builder: *Builder, out: []const u8) *ResourceGenStep {
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const self = builder.allocator.create(ResourceGenStep) catch unreachable;
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const full_out_path = std.fs.path.join(builder.allocator, &[_][]const u8{
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builder.build_root,
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out,
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}) catch unreachable;
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self.* = .{
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.step = Step.init(.custom, "resources", builder.allocator, make),
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.shader_step = vkgen.ShaderCompileStep.init(builder, &[_][]const u8{ "glslc", "--target-env=vulkan1.1" }, ""),
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.builder = builder,
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.package = .{
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.name = "resources",
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.source = .{ .generated = &self.output_file },
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.dependencies = null,
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},
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.output_file = .{
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.step = &self.step,
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.path = full_out_path,
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},
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.resources = std.ArrayList(u8).init(builder.allocator),
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};
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self.step.dependOn(&self.shader_step.step);
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return self;
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}
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fn renderPath(path: []const u8, writer: anytype) void {
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const separators = &[_]u8{ std.fs.path.sep_windows, std.fs.path.sep_posix };
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var i: usize = 0;
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while (std.mem.indexOfAnyPos(u8, path, i, separators)) |j| {
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writer.writeAll(path[i..j]) catch unreachable;
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switch (std.fs.path.sep) {
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std.fs.path.sep_windows => writer.writeAll("\\\\") catch unreachable,
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std.fs.path.sep_posix => writer.writeByte(std.fs.path.sep_posix) catch unreachable,
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else => unreachable,
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}
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i = j + 1;
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}
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writer.writeAll(path[i..]) catch unreachable;
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}
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pub fn addShader(self: *ResourceGenStep, name: []const u8, source: []const u8, entry_point: []const u8, stage: vkgen.ShaderStage) void {
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const shader_out_path = self.shader_step.add(source, .{
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.entry_point = entry_point,
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.stage = stage,
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.output_filename = std.fmt.allocPrint(self.builder.allocator, "{s}.spv", .{name}) catch unreachable,
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});
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var writer = self.resources.writer();
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writer.print("pub const {s} align(4) = @embedFile(\"", .{name}) catch unreachable;
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renderPath(shader_out_path, writer);
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writer.writeAll("\").*;\n") catch unreachable;
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}
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fn make(step: *Step) !void {
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const self = @fieldParentPtr(ResourceGenStep, "step", step);
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const cwd = std.fs.cwd();
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const dir = std.fs.path.dirname(self.output_file.path.?).?;
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try cwd.makePath(dir);
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try cwd.writeFile(self.output_file.path.?, self.resources.items);
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}
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};
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pub fn build(b: *std.build.Builder) void {
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const target = b.standardTargetOptions(.{});
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const mode = b.standardReleaseOptions();
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const exe = b.addExecutable("efemra", "src/main.zig");
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exe.setTarget(target);
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exe.setBuildMode(mode);
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exe.install();
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const gen = vkgen.VkGenerateStep.init(b, "etc/vk.xml", "vk.zig");
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exe.addPackage(gen.package);
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exe.addPackage(pkgs.uuid);
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exe.addPackage(pkgs.glfw);
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build_glfw.link(b, exe, .{});
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build_vma.link(exe, gen.output_file.getPath(), mode, target);
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build_imgui.link(exe);
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const res = ResourceGenStep.init(b, "resources.zig");
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res.addShader("DepthOnly_vert", "src/shaders/DepthOnly.hlsl", "VSMain", .vertex);
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res.addShader("DepthOnly_frag", "src/shaders/DepthOnly.hlsl", "PSMain", .fragment);
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res.addShader("brush_vert", "src/shaders/brush.hlsl", "VSMain", .vertex);
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res.addShader("brush_frag", "src/shaders/brush.hlsl", "PSMain", .fragment);
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exe.addPackage(res.package);
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const run_cmd = exe.run();
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run_cmd.step.dependOn(b.getInstallStep());
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if (b.args) |args| {
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run_cmd.addArgs(args);
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}
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const run_step = b.step("run", "Run the app");
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run_step.dependOn(&run_cmd.step);
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}
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