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431 lines
18 KiB
431 lines
18 KiB
const std = @import("std");
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const builtin = @import("builtin");
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/// Minimum supported version of Zig
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const min_ver = "0.12.0";
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comptime {
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const order = std.SemanticVersion.order;
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const parse = std.SemanticVersion.parse;
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if (order(builtin.zig_version, parse(min_ver) catch unreachable) == .lt)
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@compileError("Raylib requires zig version " ++ min_ver);
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}
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// NOTE(freakmangd): I don't like using a global here, but it prevents having to
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// get the flags a second time when adding raygui
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var raylib_flags_arr: std.ArrayListUnmanaged([]const u8) = .{};
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// This has been tested with zig version 0.12.0
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pub fn addRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode, options: Options) !*std.Build.Step.Compile {
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const raylib_dep = b.dependencyFromBuildZig(@This(), .{
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.target = target,
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.optimize = optimize,
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.raudio = options.raudio,
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.rmodels = options.rmodels,
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.rshapes = options.rshapes,
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.rtext = options.rtext,
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.rtextures = options.rtextures,
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.platform = options.platform,
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.shared = options.shared,
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.linux_display_backend = options.linux_display_backend,
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.opengl_version = options.opengl_version,
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.config = options.config,
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});
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const raylib = raylib_dep.artifact("raylib");
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if (options.raygui) {
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const raygui_dep = b.dependency(options.raygui_dependency_name, .{});
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addRaygui(b, raylib, raygui_dep);
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}
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return raylib;
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}
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fn setDesktopPlatform(raylib: *std.Build.Step.Compile, platform: PlatformBackend) void {
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raylib.defineCMacro("PLATFORM_DESKTOP", null);
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switch (platform) {
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.glfw => raylib.defineCMacro("PLATFORM_DESKTOP_GLFW", null),
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.rgfw => raylib.defineCMacro("PLATFORM_DESKTOP_RGFW", null),
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.sdl => raylib.defineCMacro("PLATFORM_DESKTOP_SDL", null),
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else => {},
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}
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}
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/// A list of all flags from `src/config.h` that one may override
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const config_h_flags = outer: {
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// Set this value higher if compile errors happen as `src/config.h` gets larger
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@setEvalBranchQuota(1 << 20);
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const config_h = @embedFile("src/config.h");
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var flags: [std.mem.count(u8, config_h, "\n") + 1][]const u8 = undefined;
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var i = 0;
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var lines = std.mem.tokenizeScalar(u8, config_h, '\n');
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while (lines.next()) |line| {
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if (!std.mem.containsAtLeast(u8, line, 1, "SUPPORT")) continue;
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if (std.mem.startsWith(u8, line, "//")) continue;
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if (std.mem.startsWith(u8, line, "#if")) continue;
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var flag = std.mem.trimLeft(u8, line, " \t"); // Trim whitespace
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flag = flag["#define ".len - 1 ..]; // Remove #define
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flag = std.mem.trimLeft(u8, flag, " \t"); // Trim whitespace
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flag = flag[0 .. std.mem.indexOf(u8, flag, " ") orelse continue]; // Flag is only one word, so capture till space
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flag = "-D" ++ flag; // Prepend with -D
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flags[i] = flag;
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i += 1;
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}
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// Uncomment this to check what flags normally get passed
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//@compileLog(flags[0..i].*);
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break :outer flags[0..i].*;
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};
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fn compileRaylib(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode, options: Options) !*std.Build.Step.Compile {
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raylib_flags_arr.clearRetainingCapacity();
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const shared_flags = &[_][]const u8{
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"-fPIC",
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"-DBUILD_LIBTYPE_SHARED",
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};
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try raylib_flags_arr.appendSlice(b.allocator, &[_][]const u8{
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"-std=gnu99",
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"-D_GNU_SOURCE",
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"-DGL_SILENCE_DEPRECATION=199309L",
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"-fno-sanitize=undefined", // https://github.com/raysan5/raylib/issues/3674
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});
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if (options.config.len > 0) {
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// Sets a flag indiciating the use of a custom `config.h`
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try raylib_flags_arr.append(b.allocator, "-DEXTERNAL_CONFIG_FLAGS");
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// Splits a space-separated list of config flags into multiple flags
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//
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// Note: This means certain flags like `-x c++` won't be processed properly.
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// `-xc++` or similar should be used when possible
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var config_iter = std.mem.tokenizeScalar(u8, options.config, ' ');
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// Apply config flags supplied by the user
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while (config_iter.next()) |config_flag|
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try raylib_flags_arr.append(b.allocator, config_flag);
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// Apply all relevant configs from `src/config.h` *except* the user-specified ones
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//
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// Note: Currently using a suboptimal `O(m*n)` time algorithm where:
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// `m` corresponds roughly to the number of lines in `src/config.h`
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// `n` corresponds to the number of user-specified flags
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outer: for (config_h_flags) |flag| {
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// If a user already specified the flag, skip it
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config_iter.reset();
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while (config_iter.next()) |config_flag| {
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// For a user-specified flag to match, it must share the same prefix and have the
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// same length or be followed by an equals sign
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if (!std.mem.startsWith(u8, config_flag, flag)) continue;
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if (config_flag.len == flag.len or config_flag[flag.len] == '=') continue :outer;
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}
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// Otherwise, append default value from config.h to compile flags
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try raylib_flags_arr.append(b.allocator, flag);
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}
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}
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if (options.shared) {
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try raylib_flags_arr.appendSlice(b.allocator, shared_flags);
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}
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const raylib = if (options.shared)
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b.addSharedLibrary(.{
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.name = "raylib",
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.target = target,
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.optimize = optimize,
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})
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else
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b.addStaticLibrary(.{
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.name = "raylib",
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.target = target,
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.optimize = optimize,
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});
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raylib.linkLibC();
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// No GLFW required on PLATFORM_DRM
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if (options.platform != .drm) {
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raylib.addIncludePath(b.path("src/external/glfw/include"));
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}
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var c_source_files = try std.ArrayList([]const u8).initCapacity(b.allocator, 2);
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c_source_files.appendSliceAssumeCapacity(&.{ "src/rcore.c", "src/utils.c" });
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if (options.raudio) {
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try c_source_files.append("src/raudio.c");
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}
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if (options.rmodels) {
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try c_source_files.append("src/rmodels.c");
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}
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if (options.rshapes) {
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try c_source_files.append("src/rshapes.c");
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}
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if (options.rtext) {
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try c_source_files.append("src/rtext.c");
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}
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if (options.rtextures) {
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try c_source_files.append("src/rtextures.c");
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}
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if (options.opengl_version != .auto) {
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raylib.defineCMacro(options.opengl_version.toCMacroStr(), null);
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}
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switch (target.result.os.tag) {
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.windows => {
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try c_source_files.append("src/rglfw.c");
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raylib.linkSystemLibrary("winmm");
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raylib.linkSystemLibrary("gdi32");
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raylib.linkSystemLibrary("opengl32");
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setDesktopPlatform(raylib, options.platform);
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},
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.linux => {
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if (options.platform != .drm) {
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try c_source_files.append("src/rglfw.c");
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if (options.linux_display_backend == .X11 or options.linux_display_backend == .Both) {
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raylib.defineCMacro("_GLFW_X11", null);
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raylib.linkSystemLibrary("GLX");
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raylib.linkSystemLibrary("X11");
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raylib.linkSystemLibrary("Xcursor");
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raylib.linkSystemLibrary("Xext");
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raylib.linkSystemLibrary("Xfixes");
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raylib.linkSystemLibrary("Xi");
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raylib.linkSystemLibrary("Xinerama");
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raylib.linkSystemLibrary("Xrandr");
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raylib.linkSystemLibrary("Xrender");
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}
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if (options.linux_display_backend == .Wayland or options.linux_display_backend == .Both) {
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_ = b.findProgram(&.{"wayland-scanner"}, &.{}) catch {
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std.log.err(
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\\ `wayland-scanner` may not be installed on the system.
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\\ You can switch to X11 in your `build.zig` by changing `Options.linux_display_backend`
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, .{});
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@panic("`wayland-scanner` not found");
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};
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raylib.defineCMacro("_GLFW_WAYLAND", null);
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raylib.linkSystemLibrary("EGL");
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raylib.linkSystemLibrary("wayland-client");
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raylib.linkSystemLibrary("xkbcommon");
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waylandGenerate(b, raylib, "wayland.xml", "wayland-client-protocol");
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waylandGenerate(b, raylib, "xdg-shell.xml", "xdg-shell-client-protocol");
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waylandGenerate(b, raylib, "xdg-decoration-unstable-v1.xml", "xdg-decoration-unstable-v1-client-protocol");
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waylandGenerate(b, raylib, "viewporter.xml", "viewporter-client-protocol");
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waylandGenerate(b, raylib, "relative-pointer-unstable-v1.xml", "relative-pointer-unstable-v1-client-protocol");
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waylandGenerate(b, raylib, "pointer-constraints-unstable-v1.xml", "pointer-constraints-unstable-v1-client-protocol");
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waylandGenerate(b, raylib, "fractional-scale-v1.xml", "fractional-scale-v1-client-protocol");
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waylandGenerate(b, raylib, "xdg-activation-v1.xml", "xdg-activation-v1-client-protocol");
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waylandGenerate(b, raylib, "idle-inhibit-unstable-v1.xml", "idle-inhibit-unstable-v1-client-protocol");
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}
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setDesktopPlatform(raylib, options.platform);
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} else {
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if (options.opengl_version == .auto) {
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raylib.linkSystemLibrary("GLESv2");
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raylib.defineCMacro("GRAPHICS_API_OPENGL_ES2", null);
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}
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raylib.linkSystemLibrary("EGL");
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raylib.linkSystemLibrary("gbm");
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raylib.linkSystemLibrary2("libdrm", .{ .use_pkg_config = .force });
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raylib.defineCMacro("PLATFORM_DRM", null);
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raylib.defineCMacro("EGL_NO_X11", null);
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raylib.defineCMacro("DEFAULT_BATCH_BUFFER_ELEMENT", "2048");
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}
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},
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.freebsd, .openbsd, .netbsd, .dragonfly => {
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try c_source_files.append("rglfw.c");
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raylib.linkSystemLibrary("GL");
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raylib.linkSystemLibrary("rt");
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raylib.linkSystemLibrary("dl");
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raylib.linkSystemLibrary("m");
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raylib.linkSystemLibrary("X11");
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raylib.linkSystemLibrary("Xrandr");
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raylib.linkSystemLibrary("Xinerama");
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raylib.linkSystemLibrary("Xi");
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raylib.linkSystemLibrary("Xxf86vm");
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raylib.linkSystemLibrary("Xcursor");
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setDesktopPlatform(raylib, options.platform);
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},
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.macos => {
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// On macos rglfw.c include Objective-C files.
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try raylib_flags_arr.append(b.allocator, "-ObjC");
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raylib.root_module.addCSourceFile(.{
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.file = b.path("src/rglfw.c"),
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.flags = raylib_flags_arr.items,
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});
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_ = raylib_flags_arr.pop();
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raylib.linkFramework("Foundation");
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raylib.linkFramework("CoreServices");
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raylib.linkFramework("CoreGraphics");
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raylib.linkFramework("AppKit");
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raylib.linkFramework("IOKit");
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setDesktopPlatform(raylib, options.platform);
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},
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.emscripten => {
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raylib.defineCMacro("PLATFORM_WEB", null);
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if (options.opengl_version == .auto) {
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raylib.defineCMacro("GRAPHICS_API_OPENGL_ES2", null);
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}
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if (b.sysroot == null) {
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@panic("Pass '--sysroot \"$EMSDK/upstream/emscripten\"'");
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}
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const cache_include = b.pathJoin(&.{ b.sysroot.?, "cache", "sysroot", "include" });
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var dir = std.fs.openDirAbsolute(cache_include, std.fs.Dir.OpenDirOptions{ .access_sub_paths = true, .no_follow = true }) catch @panic("No emscripten cache. Generate it!");
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dir.close();
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raylib.addIncludePath(.{ .cwd_relative = cache_include });
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},
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else => {
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@panic("Unsupported OS");
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},
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}
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raylib.root_module.addCSourceFiles(.{
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.files = c_source_files.items,
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.flags = raylib_flags_arr.items,
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});
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return raylib;
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}
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/// This function does not need to be called if you passed .raygui = true to addRaylib
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pub fn addRaygui(b: *std.Build, raylib: *std.Build.Step.Compile, raygui_dep: *std.Build.Dependency) void {
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if (raylib_flags_arr.items.len == 0) {
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@panic(
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\\argument 2 `raylib` in `addRaygui` must come from b.dependency("raylib", ...).artifact("raylib")
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);
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}
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var gen_step = b.addWriteFiles();
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raylib.step.dependOn(&gen_step.step);
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const raygui_c_path = gen_step.add("raygui.c", "#define RAYGUI_IMPLEMENTATION\n#include \"raygui.h\"\n");
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raylib.addCSourceFile(.{ .file = raygui_c_path, .flags = raylib_flags_arr.items });
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raylib.addIncludePath(raygui_dep.path("src"));
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raylib.installHeader(raygui_dep.path("src/raygui.h"), "raygui.h");
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}
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pub const Options = struct {
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raudio: bool = true,
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rmodels: bool = true,
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rshapes: bool = true,
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rtext: bool = true,
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rtextures: bool = true,
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raygui: bool = false,
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platform: PlatformBackend = .glfw,
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shared: bool = false,
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linux_display_backend: LinuxDisplayBackend = .Both,
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opengl_version: OpenglVersion = .auto,
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/// config should be a list of space-separated cflags, eg, "-DSUPPORT_CUSTOM_FRAME_CONTROL"
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config: []const u8 = &.{},
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raygui_dependency_name: []const u8 = "raygui",
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const defaults = Options{};
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fn getOptions(b: *std.Build) Options {
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return .{
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.platform = b.option(PlatformBackend, "platform", "Choose the platform backedn for desktop target") orelse defaults.platform,
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.raudio = b.option(bool, "raudio", "Compile with audio support") orelse defaults.raudio,
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.raygui = b.option(bool, "raygui", "Compile with raygui support") orelse defaults.raygui,
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.rmodels = b.option(bool, "rmodels", "Compile with models support") orelse defaults.rmodels,
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.rtext = b.option(bool, "rtext", "Compile with text support") orelse defaults.rtext,
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.rtextures = b.option(bool, "rtextures", "Compile with textures support") orelse defaults.rtextures,
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.rshapes = b.option(bool, "rshapes", "Compile with shapes support") orelse defaults.rshapes,
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.shared = b.option(bool, "shared", "Compile as shared library") orelse defaults.shared,
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.linux_display_backend = b.option(LinuxDisplayBackend, "linux_display_backend", "Linux display backend to use") orelse defaults.linux_display_backend,
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.opengl_version = b.option(OpenglVersion, "opengl_version", "OpenGL version to use") orelse defaults.opengl_version,
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.config = b.option([]const u8, "config", "Compile with custom define macros overriding config.h") orelse &.{},
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};
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}
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};
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pub const OpenglVersion = enum {
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auto,
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gl_1_1,
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gl_2_1,
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gl_3_3,
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gl_4_3,
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gles_2,
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gles_3,
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pub fn toCMacroStr(self: @This()) []const u8 {
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switch (self) {
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.auto => @panic("OpenglVersion.auto cannot be turned into a C macro string"),
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.gl_1_1 => return "GRAPHICS_API_OPENGL_11",
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.gl_2_1 => return "GRAPHICS_API_OPENGL_21",
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.gl_3_3 => return "GRAPHICS_API_OPENGL_33",
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.gl_4_3 => return "GRAPHICS_API_OPENGL_43",
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.gles_2 => return "GRAPHICS_API_OPENGL_ES2",
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.gles_3 => return "GRAPHICS_API_OPENGL_ES3",
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}
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}
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};
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pub const LinuxDisplayBackend = enum {
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X11,
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Wayland,
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Both,
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};
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pub const PlatformBackend = enum {
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glfw,
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rgfw,
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sdl,
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drm,
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};
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pub fn build(b: *std.Build) !void {
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// Standard target options allows the person running `zig build` to choose
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// what target to build for. Here we do not override the defaults, which
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// means any target is allowed, and the default is native. Other options
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// for restricting supported target set are available.
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const target = b.standardTargetOptions(.{});
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// Standard optimization options allow the person running `zig build` to select
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// between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
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// set a preferred release mode, allowing the user to decide how to optimize.
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const optimize = b.standardOptimizeOption(.{});
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const lib = try compileRaylib(b, target, optimize, Options.getOptions(b));
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lib.installHeader(b.path("src/raylib.h"), "raylib.h");
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lib.installHeader(b.path("src/raymath.h"), "raymath.h");
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lib.installHeader(b.path("src/rlgl.h"), "rlgl.h");
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b.installArtifact(lib);
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}
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fn waylandGenerate(
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b: *std.Build,
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raylib: *std.Build.Step.Compile,
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comptime protocol: []const u8,
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comptime basename: []const u8,
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) void {
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const waylandDir = "src/external/glfw/deps/wayland";
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const protocolDir = b.pathJoin(&.{ waylandDir, protocol });
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const clientHeader = basename ++ ".h";
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const privateCode = basename ++ "-code.h";
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const client_step = b.addSystemCommand(&.{ "wayland-scanner", "client-header" });
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client_step.addFileArg(b.path(protocolDir));
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raylib.addIncludePath(client_step.addOutputFileArg(clientHeader).dirname());
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const private_step = b.addSystemCommand(&.{ "wayland-scanner", "private-code" });
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private_step.addFileArg(b.path(protocolDir));
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raylib.addIncludePath(private_step.addOutputFileArg(privateCode).dirname());
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raylib.step.dependOn(&client_step.step);
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raylib.step.dependOn(&private_step.step);
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}
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