Commit 531c1e8079aac9fb7a12e8fe9ebd78f795870972 - zig-imgui

zig 0.9.0; make usable as lib s-ol 2 years ago

7 changed file(s) with 127 addition(s) and 83 deletion(s). Raw diff Collapse all Expand all

+22

-15

build.zig less more

1	1	const builtin = @import("builtin");
2	2
3	3	pub fn build(b: *Builder) void {
4		const target = b.standardTargetOptions(.{});
5		const mode = b.standardReleaseOptions();
6		const windows = b.option(bool, "windows", "create windows build") orelse false;
	4	const mode = b.standardReleaseOptions();
7	5
8		var exe = b.addExecutable("test", "src/main.zig");
9		exe.setBuildMode(mode);
	6	const lib = b.addStaticLibrary("imgui", "src/main.zig");
	7	lib.setBuildMode(mode);
	8	lib.linkSystemLibrary("c");
	9	lib.linkSystemLibrary("glfw");
	10	lib.linkSystemLibrary("epoxy");
	11	lib.addIncludeDir("cimgui");
	12	lib.linkSystemLibraryName("cimgui/cimgui.so");
	13	lib.install();
10	14
11		exe.linkSystemLibrary("c");
12		exe.linkSystemLibrary("glfw");
13		exe.linkSystemLibrary("epoxy");
14		exe.addIncludeDir("cimgui");
15		exe.linkSystemLibraryName("cimgui/cimgui.so");
16		exe.install();
	15	var exe = b.addExecutable("demo", "src/demo.zig");
	16	exe.setBuildMode(mode);
17	17
18		const play = b.step("play", "Play the game");
19		const run = exe.run();
20		run.step.dependOn(b.getInstallStep());
21		play.dependOn(&run.step);
	18	exe.linkSystemLibrary("c");
	19	exe.linkSystemLibrary("glfw");
	20	exe.linkSystemLibrary("epoxy");
	21	exe.addIncludeDir("cimgui");
	22	exe.linkSystemLibraryName("cimgui/cimgui.so");
	23	exe.install();
	24
	25	const demo = b.step("demo", "Run the demo");
	26	const run = exe.run();
	27	run.step.dependOn(b.getInstallStep());
	28	demo.dependOn(&run.step);
22	29	}

-0

imgui.zig less more

pub usingnamespace @import("./src/main.zig");

-2

src/debug_gl.zig less more

3	3	const panic = std.debug.panic;
4	4	const builtin = @import("builtin");
5	5
6		pub const is_on = if (builtin.mode == builtin.Mode.ReleaseFast) c.GL_FALSE else c.GL_TRUE;
	6	pub const is_on = if (builtin.mode == .ReleaseFast) c.GL_FALSE else c.GL_TRUE;
7	7
8	8	pub fn assertNoError() void {
9		if (builtin.mode != builtin.Mode.ReleaseFast) {
	9	if (builtin.mode != .ReleaseFast) {
10	10	const err = c.glGetError();
11	11	if (err != c.GL_NO_ERROR) {
12	12	panic("GL error: {}\n", err);

+25

-0

src/demo.zig less more

	0	const ig = @import("main.zig");
	1
	2	pub fn main() !void {
	3	const window = ig.Window.init();
	4
	5	// const start_time = c.glfwGetTime();
	6	// var prev_time = start_time;
	7	var show_demo = false;
	8
	9	while (!window.shouldClose()) {
	10	try window.beginFrame();
	11
	12	// main part
	13	if (show_demo)
	14	ig.igShowDemoWindow(null);
	15
	16	if (ig.igBegin("yolozwek", null, 0)) {
	17	ig.igText("Hello World :)");
	18	_ = ig.igCheckbox("Demo window", &show_demo);
	19	ig.igEnd();
	20	}
	21
	22	window.endFrame();
	23	}
	24	}

-6

src/gl3_impl.zig less more

154	154	var buf: [1024]u8 = undefined;
155	155	var length: c.GLsizei = undefined;
156	156	getInfoLogFunc(handle, buf.len, &length, &buf[0]);
157		debug.warn("{}\n", .{buf[0..@intCast(usize, length)]});
	157	debug.warn("{s}\n", .{buf[0..@intCast(usize, length)]});
158	158	}
159	159
160	160	if (@intCast(c.GLboolean, status) == c.GL_FALSE) {
161		debug.warn("ERROR: CreateDeviceObjects: failed to compile/link {}! (with GLSL '{}')\n", .{ desc, g_GlslVersionString });
	161	debug.warn("ERROR: CreateDeviceObjects: failed to compile/link {s}! (with GLSL '{s}')\n", .{ desc, g_GlslVersionString });
162	162	return error.ShaderLinkError;
163	163	}
164	164	}

442	442	c.glEnableVertexAttribArray(@intCast(c.GLuint, g_AttribLocationVtxPos));
443	443	c.glEnableVertexAttribArray(@intCast(c.GLuint, g_AttribLocationVtxUV));
444	444	c.glEnableVertexAttribArray(@intCast(c.GLuint, g_AttribLocationVtxColor));
445		c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxPos), 2, c.GL_FLOAT, c.GL_FALSE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @byteOffsetOf(c.ImDrawVert, "pos")));
446		c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxUV), 2, c.GL_FLOAT, c.GL_FALSE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @byteOffsetOf(c.ImDrawVert, "uv")));
447		c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxColor), 4, c.GL_UNSIGNED_BYTE, c.GL_TRUE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @byteOffsetOf(c.ImDrawVert, "col")));
448		}
	445	c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxPos), 2, c.GL_FLOAT, c.GL_FALSE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @offsetOf(c.ImDrawVert, "pos")));
	446	c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxUV), 2, c.GL_FLOAT, c.GL_FALSE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @offsetOf(c.ImDrawVert, "uv")));
	447	c.glVertexAttribPointer(@intCast(c.GLuint, g_AttribLocationVtxColor), 4, c.GL_UNSIGNED_BYTE, c.GL_TRUE, @sizeOf(c.ImDrawVert), @intToPtr(?*c.GLvoid, @offsetOf(c.ImDrawVert, "col")));
	448	}

-3

src/glfw_impl.zig less more

34	34	io.*.BackendFlags \|= c.ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
35	35	if (false) io.*.BackendFlags \|= c.ImGuiBackendFlags_PlatformHasViewports; // We can create multi-viewports on the Platform side (optional)
36	36	if (false and @hasField(c, "GLFW_HAS_GLFW_HOVERED") and builtin.os == builtin.Os.windows) {
37		io.*.BackendFlags \|= ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy)
	37	io.*.BackendFlags \|= c.ImGuiBackendFlags_HasMouseHoveredViewport; // We can set io.MouseHoveredViewport correctly (optional, not easy)
38	38	}
39	39	io.*.BackendPlatformName = "imgui_impl_glfw.zig";
40	40

165	165	var w: c_int = undefined;
166	166	var h: c_int = undefined;
167	167	c.glfwGetMonitorWorkarea(glfw_monitor, &x, &y, &w, &h);
168		monitor.*.WorkPos = ImVec2{ .x = @intToFloat(f32, x), .y = @intToFloat(f32, y) };
169		monitor.*.WorkSize = ImVec2{ .x = @intToFloat(f32, w), .y = @intToFloat(f32, h) };
	168	monitor.*.WorkPos = c.ImVec2{ .x = @intToFloat(f32, x), .y = @intToFloat(f32, y) };
	169	monitor.*.WorkSize = c.ImVec2{ .x = @intToFloat(f32, w), .y = @intToFloat(f32, h) };
170	170	}
171	171	if (false and c.GLFW_HAS_PER_MONITOR_DPI) {
172	172	// Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings,

+68

-57

src/main.zig less more

6	6	const gl3_impl = @import("gl3_impl.zig");
7	7
8	8	fn errorCallback(err: c_int, description: [*c]const u8) callconv(.C) void {
9		panic("Error: {}\n", .{ description });
	9	_ = err;
	10	panic("Error: {s}\n", .{description});
10	11	}
11	12
12		var window: *c.GLFWwindow = undefined;
	13	pub usingnamespace c;
13	14
14		fn handleStuff(path: [*c]const u8, x: i32, y: i32) callconv(.C) bool {
15		return true;
16		}
	15	pub const Window = struct {
	16	window: *c.GLFWwindow,
	17	context: *c.ImGuiContext,
17	18
18		pub fn main() !void {
19		_ = c.glfwSetErrorCallback(errorCallback);
	19	pub fn init() Window {
	20	_ = c.glfwSetErrorCallback(errorCallback);
20	21
21		if (c.glfwInit() == c.GL_FALSE) {
22		panic("GLFW init failure\n", .{});
23		}
24		defer c.glfwTerminate();
	22	if (c.glfwInit() == c.GL_FALSE) {
	23	panic("GLFW init failure\n", .{});
	24	}
	25	errdefer c.glfwTerminate();
25	26
26		c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MAJOR, 3);
27		c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MINOR, 2);
28		c.glfwWindowHint(c.GLFW_OPENGL_FORWARD_COMPAT, c.GL_TRUE);
29		c.glfwWindowHint(c.GLFW_OPENGL_DEBUG_CONTEXT, debug_gl.is_on);
30		c.glfwWindowHint(c.GLFW_OPENGL_PROFILE, c.GLFW_OPENGL_CORE_PROFILE);
31		// c.glfwWindowHint(c.GLFW_DEPTH_BITS, 0);
32		// c.glfwWindowHint(c.GLFW_STENCIL_BITS, 8);
33		c.glfwWindowHint(c.GLFW_RESIZABLE, c.GL_TRUE);
	27	c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MAJOR, 3);
	28	c.glfwWindowHint(c.GLFW_CONTEXT_VERSION_MINOR, 2);
	29	c.glfwWindowHint(c.GLFW_OPENGL_FORWARD_COMPAT, c.GL_TRUE);
	30	c.glfwWindowHint(c.GLFW_OPENGL_DEBUG_CONTEXT, debug_gl.is_on);
	31	c.glfwWindowHint(c.GLFW_OPENGL_PROFILE, c.GLFW_OPENGL_CORE_PROFILE);
	32	// c.glfwWindowHint(c.GLFW_DEPTH_BITS, 0);
	33	// c.glfwWindowHint(c.GLFW_STENCIL_BITS, 8);
	34	c.glfwWindowHint(c.GLFW_RESIZABLE, c.GL_TRUE);
34	35
35		const window_width = 640;
36		const window_height = 480;
37		window = c.glfwCreateWindow(window_width, window_height, "ImGUI Test", null, null) orelse {
38		panic("unable to create window\n", .{});
39		};
40		defer c.glfwDestroyWindow(window);
	36	const window_width = 640;
	37	const window_height = 480;
	38	const window = c.glfwCreateWindow(window_width, window_height, "ImGUI Test", null, null) orelse {
	39	panic("unable to create window\n", .{});
	40	};
	41	errdefer c.glfwDestroyWindow(window);
41	42
42		c.glfwMakeContextCurrent(window);
43		c.glfwSwapInterval(1);
	43	c.glfwMakeContextCurrent(window);
	44	c.glfwSwapInterval(1);
44	45
45		const context = c.igCreateContext(null);
46		defer c.igDestroyContext(context);
	46	const context = c.igCreateContext(null) orelse panic("ImGui init failure\n", .{});
	47	errdefer c.igDestroyContext(context);
47	48
48		const io = c.igGetIO();
49		io.*.ConfigFlags \|= c.ImGuiConfigFlags_NavEnableKeyboard;
50		io.*.ConfigFlags \|= c.ImGuiConfigFlags_DockingEnable;
51		// io.*.ConfigFlags \|= c.ImGuiConfigFlags_ViewportsEnable;
	49	const io = c.igGetIO();
	50	io.*.ConfigFlags \|= c.ImGuiConfigFlags_NavEnableKeyboard;
	51	io.*.ConfigFlags \|= c.ImGuiConfigFlags_DockingEnable;
	52	// io.*.ConfigFlags \|= c.ImGuiConfigFlags_ViewportsEnable;
52	53
53		const style = c.igGetStyle();
54		c.igStyleColorsDark(style);
	54	const style = c.igGetStyle();
	55	c.igStyleColorsDark(style);
55	56
56		if (false and io.*.ConfigFlags & @enumToInt(c.ImGuiConfigFlags_ViewportsEnable) != 0) {
57		style.*.WindowRounding = 0.0;
58		style.*.Colors[@enumToInt(c.ImGuiCol_WindowBg)].w = 1.0;
	57	if (io.*.ConfigFlags & c.ImGuiConfigFlags_ViewportsEnable != 0) {
	58	style.*.WindowRounding = 0.0;
	59	style.*.Colors[c.ImGuiCol_WindowBg].w = 1.0;
	60	}
	61
	62	glfw_impl.Init(window, true, glfw_impl.ClientApi.OpenGL);
	63	errdefer glfw_impl.Shutdown();
	64
	65	gl3_impl.Init();
	66	errdefer gl3_impl.Shutdown();
	67
	68	return .{
	69	.window = window,
	70	.context = context,
	71	};
59	72	}
60	73
61		glfw_impl.Init(window, true, glfw_impl.ClientApi.OpenGL);
62		defer glfw_impl.Shutdown();
	74	pub fn deinit(self: *const Window) void {
	75	gl3_impl.Shutdown();
	76	glfw_impl.Shutdown();
	77	c.igDestroyContext(self.context);
	78	c.glfwDestroyWindow(self.window);
	79	c.glfwTerminate();
	80	}
63	81
64		gl3_impl.Init(); // #version 150
65		defer gl3_impl.Shutdown();
	82	pub fn shouldClose(self: *const Window) bool {
	83	return c.glfwWindowShouldClose(self.window) == c.GL_TRUE;
	84	}
66	85
67		const start_time = c.glfwGetTime();
68		var prev_time = start_time;
	86	pub fn beginFrame(self: *const Window) !void {
	87	_ = self;
69	88
70		while (c.glfwWindowShouldClose(window) == c.GL_FALSE) {
71	89	c.glfwPollEvents();
72	90
73	91	try gl3_impl.NewFrame();
74	92	glfw_impl.NewFrame();
75	93	c.igNewFrame();
	94	}
76	95
77		// main part
78		c.igShowDemoWindow(null);
79
	96	pub fn endFrame(self: *const Window) void {
80	97	c.igRender();
81	98	var w: c_int = undefined;
82	99	var h: c_int = undefined;
83		c.glfwGetFramebufferSize(window, &w, &h);
	100	c.glfwGetFramebufferSize(self.window, &w, &h);
84	101	c.glViewport(0, 0, w, h);
85	102	c.glClearColor(0.0, 0.0, 0.0, 0.0);
86	103	c.glClear(c.GL_COLOR_BUFFER_BIT);
87	104	gl3_impl.RenderDrawData(c.igGetDrawData());
88	105
89		// const now_time = c.glfwGetTime();
90		// const elapsed = now_time - prev_time;
91		// prev_time = now_time;
92		// nextFrame(t, elapsed);
93		// draw(t, @This());
94
95		c.glfwSwapBuffers(window);
	106	c.glfwSwapBuffers(self.window);
96	107	}
97		}
	108	};