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ImGUI wrapper (#49)
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* move module cimgui to imgui
* zig-build: sokol-flags changed
* zig-build: ldmd2 boundcheck impl for wasm32
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@kassane
kassane authored Jan 19, 2025
1 parent d233212 commit d0bea8f
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Showing 8 changed files with 3,903 additions and 133 deletions.
158 changes: 98 additions & 60 deletions build.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -91,20 +91,24 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*CompileStep {
}

// resolve .auto backend into specific backend by platform
var cflags = try std.BoundedArray([]const u8, 64).init(0);
try cflags.append("-DIMPL");
if (options.optimize != .Debug) {
try cflags.append("-DNDEBUG");
}
const backend = resolveSokolBackend(options.backend, lib.rootModuleTarget());
const backend_cflags = switch (backend) {
.d3d11 => "-DSOKOL_D3D11",
.metal => "-DSOKOL_METAL",
.gl => "-DSOKOL_GLCORE",
.gles3 => "-DSOKOL_GLES3",
.wgpu => "-DSOKOL_WGPU",
switch (backend) {
.d3d11 => try cflags.append("-DSOKOL_D3D11"),
.metal => try cflags.append("-DSOKOL_METAL"),
.gl => try cflags.append("-DSOKOL_GLCORE"),
.gles3 => try cflags.append("-DSOKOL_GLES3"),
.wgpu => try cflags.append("-DSOKOL_WGPU"),
else => @panic("unknown sokol backend"),
};
}

// platform specific compile and link options
var cflags: []const []const u8 = &.{ "-DIMPL", backend_cflags };
if (lib.rootModuleTarget().isDarwin()) {
cflags = &.{ "-ObjC", "-DIMPL", backend_cflags };
try cflags.append("-ObjC");
lib.linkFramework("Foundation");
lib.linkFramework("AudioToolbox");
if (.metal == backend) {
Expand Down Expand Up @@ -134,11 +138,10 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*CompileStep {
lib.linkSystemLibrary("android");
lib.linkSystemLibrary("log");
} else if (lib.rootModuleTarget().os.tag == .linux) {
const egl_cflags = if (options.use_egl) "-DSOKOL_FORCE_EGL " else "";
const x11_cflags = if (!options.use_x11) "-DSOKOL_DISABLE_X11 " else "";
const wayland_cflags = if (!options.use_wayland) "-DSOKOL_DISABLE_WAYLAND" else "";
if (options.use_egl) try cflags.append("-DSOKOL_FORCE_EGL");
if (!options.use_x11) try cflags.append("-DSOKOL_DISABLE_X11");
if (!options.use_wayland) try cflags.append("-DSOKOL_DISABLE_WAYLAND");
const link_egl = options.use_egl or options.use_wayland;
cflags = &.{ "-DIMPL", backend_cflags, egl_cflags, x11_cflags, wayland_cflags };
lib.linkSystemLibrary("asound");
lib.linkSystemLibrary("GL");
if (options.use_x11) {
Expand All @@ -153,7 +156,7 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*CompileStep {
lib.linkSystemLibrary("xkbcommon");
}
if (link_egl) {
lib.linkSystemLibrary("egl");
lib.linkSystemLibrary("EGL");
}
} else if (lib.rootModuleTarget().os.tag == .windows) {
lib.linkSystemLibrary("kernel32");
Expand All @@ -166,44 +169,45 @@ pub fn buildLibSokol(b: *Build, options: LibSokolOptions) !*CompileStep {
}
}

// finally add the C source files
const csrc_root = "src/sokol/c/";
const csources = [_][]const u8{
csrc_root ++ "sokol_log.c",
csrc_root ++ "sokol_app.c",
csrc_root ++ "sokol_gfx.c",
csrc_root ++ "sokol_time.c",
csrc_root ++ "sokol_audio.c",
csrc_root ++ "sokol_gl.c",
csrc_root ++ "sokol_debugtext.c",
csrc_root ++ "sokol_shape.c",
csrc_root ++ "sokol_fetch.c",
csrc_root ++ "sokol_glue.c",
csrc_root ++ "sokol_memtrack.c",
"sokol_log.c",
"sokol_app.c",
"sokol_gfx.c",
"sokol_time.c",
"sokol_audio.c",
"sokol_gl.c",
"sokol_debugtext.c",
"sokol_shape.c",
"sokol_glue.c",
"sokol_fetch.c",
"sokol_memtrack.c",
};
for (csources) |csrc| {

// finally add the C source files
inline for (csources) |csrc| {
lib.addCSourceFile(.{
.file = b.path(csrc),
.flags = cflags,
.file = b.path(csrc_root ++ csrc),
.flags = cflags.slice(),
});
}

if (options.with_sokol_imgui) {
lib.addCSourceFile(.{
.file = b.path(csrc_root ++ "sokol_imgui.c"),
.flags = cflags,
.flags = cflags.slice(),
});
const cimgui = try buildImgui(b, .{
const imgui = try buildImgui(b, .{
.target = options.target,
.optimize = options.optimize,
.emsdk = options.emsdk,
.use_tsan = lib.root_module.sanitize_thread orelse false,
.use_ubsan = lib.root_module.sanitize_c orelse false,
});
for (cimgui.root_module.include_dirs.items) |dir| {
for (imgui.root_module.include_dirs.items) |dir| {
try lib.root_module.include_dirs.append(b.allocator, dir);
}
lib.linkLibrary(cimgui);
lib.linkLibrary(imgui);
}
return lib;
}
Expand Down Expand Up @@ -320,7 +324,10 @@ pub fn ldcBuildStep(b: *Build, options: DCompileStep) !*std.Build.Step.InstallDi
// set kind of build
switch (options.kind) {
.@"test" => {
ldc_exec.addArgs(&.{ "-unittest", "-main" });
ldc_exec.addArgs(&.{
"-unittest",
"-main",
});
},
.obj => ldc_exec.addArg("-c"),
else => {},
Expand Down Expand Up @@ -367,27 +374,45 @@ pub fn ldcBuildStep(b: *Build, options: DCompileStep) !*std.Build.Step.InstallDi
if (options.betterC)
ldc_exec.addArg("-betterC");

// verbose error messages
ldc_exec.addArg("-verrors=context");

switch (options.optimize) {
.Debug => {
ldc_exec.addArg("-debug");
ldc_exec.addArg("-d-debug");
ldc_exec.addArg("-gc"); // debuginfo for non D dbg
ldc_exec.addArg("-g"); // debuginfo for D dbg
ldc_exec.addArg("-gf");
ldc_exec.addArg("-gs");
ldc_exec.addArg("-vgc");
ldc_exec.addArg("-vtls");
ldc_exec.addArg("-verrors=context");
ldc_exec.addArg("-boundscheck=on");
ldc_exec.addArgs(&.{
"-debug",
"-d-debug",
"--gc",
"-g",
"-gf",
"-gs",
"-vgc",
"-vtls",
"-boundscheck=on",
"--link-debuglib",
});
},
.ReleaseSafe => {
ldc_exec.addArgs(&.{ "-O2", "-boundscheck=safeonly" });
ldc_exec.addArgs(&.{
"-O",
"-boundscheck=safeonly",
});
},
.ReleaseFast => {
ldc_exec.addArgs(&.{ "-O3", "-boundscheck=off", "--enable-asserts=false" });
ldc_exec.addArgs(&.{
"-O",
"-boundscheck=off",
"--enable-asserts=false",
"--strip-debug",
});
},
.ReleaseSmall => {
ldc_exec.addArgs(&.{ "-Oz", "-boundscheck=off", "--enable-asserts=false" });
ldc_exec.addArgs(&.{
"-Oz",
"-boundscheck=off",
"--enable-asserts=false",
"--strip-debug",
});
},
}

Expand Down Expand Up @@ -422,7 +447,7 @@ pub fn ldcBuildStep(b: *Build, options: DCompileStep) !*std.Build.Step.InstallDi
"-i=sokol",
"-i=shaders",
"-i=handmade",
"-i=cimgui",
"-i=imgui",
});

// sokol include path
Expand Down Expand Up @@ -507,6 +532,13 @@ pub fn ldcBuildStep(b: *Build, options: DCompileStep) !*std.Build.Step.InstallDi
\\
\\ pragma(printf)
\\ int fprintf(FILE* __restrict, scope const(char)* __restrict, scope...) @nogc nothrow;
\\
\\ // boundchecking
\\ void _d_arraybounds_index(string file, uint line, size_t index, size_t length) @nogc nothrow
\\ {
\\ if (index >= length)
\\ __assert("Array index out of bounds".ptr, file.ptr, line);
\\ }
\\ }
,
),
Expand Down Expand Up @@ -1148,9 +1180,22 @@ fn buildImgui(b: *Build, options: libImGuiOptions) !*CompileStep {
libimgui.root_module.sanitize_c = options.use_ubsan;
libimgui.root_module.sanitize_thread = options.use_tsan;

var cflags = try std.BoundedArray([]const u8, 64).init(0);
if (options.optimize != .Debug) {
try cflags.append("-DNDEBUG");
}
try cflags.appendSlice(&.{
"-Wall",
"-Wextra",
"-fno-exceptions",
"-Wno-unused-parameter",
"-Wno-missing-field-initializers",
"-fno-threadsafe-statics",
});

if (b.lazyDependency("imgui", .{})) |dep| {
const cimgui = dep.path(imguiver_path);
libimgui.addIncludePath(cimgui);
const imgui = dep.path(imguiver_path);
libimgui.addIncludePath(imgui);

if (options.emsdk) |emsdk| {
if (libimgui.rootModuleTarget().isWasm()) {
Expand All @@ -1168,28 +1213,21 @@ fn buildImgui(b: *Build, options: libImGuiOptions) !*CompileStep {
}
}
libimgui.addCSourceFiles(.{
.root = cimgui,
.root = imgui,
.files = &.{
"cimgui.cpp",
},
});
libimgui.addCSourceFiles(.{
.root = cimgui,
.root = imgui,
.files = &.{
"imgui.cpp",
"imgui_draw.cpp",
"imgui_demo.cpp",
"imgui_widgets.cpp",
"imgui_tables.cpp",
},
.flags = &.{
"-Wall",
"-Wextra",
"-fno-exceptions",
"-Wno-unused-parameter",
"-Wno-missing-field-initializers",
"-fno-threadsafe-statics",
},
.flags = cflags.slice(),
});
libimgui.root_module.sanitize_c = false;
if (libimgui.rootModuleTarget().os.tag == .windows)
Expand Down
4 changes: 2 additions & 2 deletions build.zig.zon
View file
Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,8 @@
},
.dependencies = .{
.imgui = .{
.url = "git+https://github.com/floooh/dcimgui#4fcf465cf40a297affa887d2fb4a9342e0461b01",
.hash = "12200aded8c04f0f18420f41bd97392d67da33b74833e8474932ad58e2fedd2f905c",
.url = "git+https://github.com/floooh/dcimgui#v1.91.7",
.hash = "1220c640ad23d8800437166865e54f172c612fcfe6e000149a2b2af631c37b605f50",
.lazy = true,
},
.emsdk = .{
Expand Down
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