Various cleanup
I replaced the rgb function with a packed struct, formatted the code, and updated a couple of allocator things to fit Zig v0.9.0.
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@ -23,7 +23,7 @@ pub fn link(b: *std.build.Builder, step: *std.build.LibExeObjStep) void {
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step.linkLibrary(lib);
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}
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fn fromHere(allocator: *std.mem.Allocator, path: []const u8) []const u8 {
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fn fromHere(allocator: std.mem.Allocator, path: []const u8) []const u8 {
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const here = std.fs.path.dirname(@src().file) orelse ".";
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return std.fs.path.join(allocator, &.{here, path}) catch unreachable;
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}
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@ -1,13 +1,16 @@
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const std = @import("std");
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const minifb_c = @cImport({
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const c = @cImport({
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@cInclude("MiniFB.h");
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@cInclude("MiniFB_enums.h");
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});
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const testing = std.testing;
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pub fn rgb(r: u8, g: u8, b: u8) u32 {
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return @intCast(u32, r) << 16 | @intCast(u32, g) << 8 | b;
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}
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pub const Rgb = packed struct {
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r: u8,
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g: u8,
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b: u8,
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_reserved: u8 = 0,
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};
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pub const KeyMod = packed struct {
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shift: bool = false,
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@ -16,12 +19,12 @@ pub const KeyMod = packed struct {
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super: bool = false,
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capsLock: bool = false,
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numLock: bool = false,
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reserved: u26 = 0,
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_reserved: u26 = 0,
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};
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pub fn Window(comptime TUserData: type) type {
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return struct {
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cwin: *minifb_c.mfb_window,
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return packed struct {
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cwin: *c.mfb_window,
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pub const UpdateError = error{
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InvalidWindow,
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@ -43,76 +46,84 @@ pub fn Window(comptime TUserData: type) type {
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pub fn open(title: [*:0]const u8, width: u32, height: u32, flags: OpenFlags) !Window(TUserData) {
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const intFlags = @bitCast(u32, flags);
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const cTitle = @as([*c]const u8, title);
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const cwin: ?*minifb_c.mfb_window = minifb_c.mfb_open_ex(cTitle, width, height, intFlags);
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const cwin: ?*c.mfb_window = c.mfb_open_ex(cTitle, width, height, intFlags);
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if (cwin) |value| {
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return Window(TUserData){ .cwin = value };
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} else {
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return error.ItBroke;
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}
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}
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pub fn waitSync(self: Window(TUserData)) bool {
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return minifb_c.mfb_wait_sync(self.cwin);
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return c.mfb_wait_sync(self.cwin);
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}
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pub fn update(self: Window(TUserData), buffer: []u32) UpdateError!State {
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const rawState = minifb_c.mfb_update(self.cwin, buffer.ptr);
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pub fn update(self: Window(TUserData), buffer: []Rgb) UpdateError!State {
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const rawState = c.mfb_update(self.cwin, @ptrCast(*anyopaque, buffer.ptr));
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switch (rawState) {
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.STATE_OK => return State.ok,
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.STATE_EXIT => return State.exit,
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.STATE_INVALID_WINDOW => return UpdateError.InvalidWindow,
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.STATE_INVALID_BUFFER => return UpdateError.InvalidBuffer,
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c.STATE_OK => return State.ok,
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c.STATE_EXIT => return State.exit,
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c.STATE_INVALID_WINDOW => return UpdateError.InvalidWindow,
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c.STATE_INVALID_BUFFER => return UpdateError.InvalidBuffer,
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else => return UpdateError.InternalError,
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}
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}
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pub fn setUserData(self: Window(TUserData), data: *TUserData) void {
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minifb_c.mfb_set_user_data(self.cwin, data);
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c.mfb_set_user_data(self.cwin, data);
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}
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pub fn getUserData(self: Window(TUserData)) ?*TUserData {
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return @ptrCast(?*TUserData, @alignCast(@alignOf(?*TUserData), minifb_c.mfb_get_user_data(self.cwin)));
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var cData = c.mfb_get_user_data(self.cwin);
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std.log.info("@alignOf cwin={d}, addr={x}", .{ @alignOf(@TypeOf(self.cwin)), @ptrToInt(self.cwin) });
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std.log.info("@alignOf cdata={d}, addr={x}", .{ @alignOf(@TypeOf(cData)), @ptrToInt(cData) });
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return @ptrCast(?*TUserData, @alignCast(@alignOf(?*TUserData), cData));
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}
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test "user data is null if never set" {
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const win = try Window(u8).open("", 100, 100);
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const data = win.getUserData();
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testing.expectEqual(null, data);
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}
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test "user data is not null if previously set" {
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const win = try Window(u8).open("", 100, 100);
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var data: u8 = 42;
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win.setUserData(&data);
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testing.expectEqual(42, win.getUserData().?.*);
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pub const ActiveFunc = fn (win: Window(TUserData), isActive: bool) void;
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pub fn setActiveCallback(self: Window(TUserData), callback: ActiveFunc) void {
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c.mfb_set_active_callback(self.cwin, @ptrCast(c.mfb_active_func, callback));
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}
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};
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}
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test "user data is null if never set" {
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const win = try Window(u64).open("abc", 100, 100, .{});
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const data = win.getUserData();
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try testing.expectEqual(@as(?*u64, null), data);
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}
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// test "user data is not null if previously set" {
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// const win = try Window(u64).open("abc", 100, 100, .{});
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// var data: u64 = 42;
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// win.setUserData(&data);
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// const expected: u64 = 42;
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// try testing.expectEqual(expected, win.getUserData().?.*);
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// }
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pub fn getTargetFPS() u32 {
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return minifb_c.mfb_get_target_fps();
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return c.mfb_get_target_fps();
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}
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pub fn setTargetFPS(fps: u32) void {
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minifb_c.mfb_set_target_fps(fps);
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c.mfb_set_target_fps(fps);
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}
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// TODO Figure out how to run this once I have Internet access.
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test "set and get target FPS" {
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const max = 40;
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var fps: u32 = 30;
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while (fps < max) {
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setTargetFPS(fps);
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try std.testing.expectEqual(fps, getTargetFPS());
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}
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}
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// test "set and get target FPS" {
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// const max = 40;
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// var fps: u32 = 30;
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// while (fps < max) {
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// setTargetFPS(fps);
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// try std.testing.expectEqual(fps, getTargetFPS());
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// }
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// }
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pub const Timer = struct {
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ctimer: *minifb_c.mfb_timer,
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pub const Timer = extern struct {
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ctimer: *c.mfb_timer,
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pub fn init() !Timer {
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const ctimer: ?*minifb_c.mfb_timer = minifb_c.mfb_timer_create();
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const ctimer: ?*c.mfb_timer = c.mfb_timer_create();
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if (ctimer) |value| {
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return Timer{ .ctimer = value };
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} else {
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@ -121,26 +132,26 @@ pub const Timer = struct {
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}
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pub fn deinit(self: Timer) void {
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minifb_c.mfb_timer_destroy(self.ctimer);
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c.mfb_timer_destroy(self.ctimer);
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}
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pub fn reset(self: Timer) void {
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minifb_c.mfb_timer_reset(self.ctimer);
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c.mfb_timer_reset(self.ctimer);
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}
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pub fn now(self: Timer) f64 {
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return minifb_c.mfb_timer_now(self.ctimer);
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return c.mfb_timer_now(self.ctimer);
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}
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pub fn delta(self: Timer) f64 {
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return minifb_c.mfb_timer_delta(self.ctimer);
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return c.mfb_timer_delta(self.ctimer);
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}
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pub fn getFrequency() f64 {
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return minifb_c.mfb_timer_get_frequency();
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return c.mfb_timer_get_frequency();
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}
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pub fn getResolution() f64 {
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return minifb_c.mfb_timer_get_resolution();
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return c.mfb_timer_get_resolution();
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}
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};
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61
src/main.zig
61
src/main.zig
@ -6,8 +6,8 @@ const max = std.math.max;
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const Width = 800;
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const Height = 600;
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fn grey(value: u8) u32 {
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return mfb.rgb(value, value, value);
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fn grey(value: u8) mfb.Rgb {
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return mfb.Rgb{ .r = value, .g = value, .b = value };
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}
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const Coords = struct {
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@ -17,40 +17,47 @@ const Coords = struct {
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const State = struct {
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period: f64,
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timer: mfb.Timer,
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timer: *mfb.Timer,
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active: bool = true,
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alloc: std.mem.Allocator,
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pub fn init(period: f64) !State {
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const timer = try mfb.Timer.init();
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pub fn init(alloc: std.mem.Allocator, period: f64) !State {
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var timer = try alloc.create(mfb.Timer);
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timer.* = try mfb.Timer.init();
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return State{
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.period = period,
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.timer = timer,
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.alloc = alloc,
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};
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}
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pub fn deinit(self: State) void {
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self.timer.deinit();
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self.timer.*.deinit();
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self.alloc.destroy(self.timer);
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}
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pub fn render(self: State, buf: Buffer) void {
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var bgValue = @rem(self.timer.now(), self.period) / self.period * 512;
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var bgValue = @rem(self.timer.*.now(), self.period) / self.period * 512;
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if (bgValue >= 256) {
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bgValue = 512 - bgValue;
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}
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const rectColor = if (self.active) mfb.Rgb{ .r = 0, .g = 255, .b = 0 } else mfb.Rgb{ .r = 255, .g = 0, .b = 0 };
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buf.drawRectangle(.{ .x = 0, .y = 0 }, .{ .x = Width, .y = Height }, grey(@floatToInt(u8, bgValue)));
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buf.drawRectangle(.{.x=Width/3, .y=Height/3}, .{.x=2*Width/3, .y=2*Height/3}, mfb.rgb(255,0,0));
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buf.drawRectangle(.{.x=0,.y=0}, .{.x=10,.y=10}, mfb.rgb(0,0,255));
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buf.drawRectangle(.{ .x = Width / 3, .y = Height / 3 }, .{ .x = 2 * Width / 3, .y = 2 * Height / 3 }, rectColor);
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buf.drawRectangle(.{ .x = 0, .y = 0 }, .{ .x = 10, .y = 10 }, mfb.Rgb{ .r = 0, .g = 0, .b = 255 });
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}
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};
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const Buffer = struct {
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alloc: *std.mem.Allocator,
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slice: []u32,
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alloc: std.mem.Allocator,
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slice: []mfb.Rgb,
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width: u32,
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height: u32,
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pub fn init(alloc: *std.mem.Allocator, width: u32, height: u32) !Buffer {
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const slice = try alloc.alloc(u32, width*height);
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pub fn init(alloc: std.mem.Allocator, width: u32, height: u32) !Buffer {
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const slice = try alloc.alloc(mfb.Rgb, width * height);
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return Buffer{
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.alloc = alloc,
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.slice = slice,
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@ -63,13 +70,13 @@ const Buffer = struct {
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self.alloc.free(self.slice);
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}
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pub fn setPixel(self: Buffer, coords: Coords, color: u32) void {
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pub fn setPixel(self: Buffer, coords: Coords, color: mfb.Rgb) void {
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const x = @intCast(u32, coords.x);
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const y = @intCast(u32, coords.y);
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self.slice[y * self.width + x] = color;
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}
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pub fn drawRectangle(self: Buffer, a: Coords, b: Coords, color: u32) void {
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pub fn drawRectangle(self: Buffer, a: Coords, b: Coords, color: mfb.Rgb) void {
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var start = Coords{
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.x = max(0, min(a.x, b.x)),
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.y = max(0, min(a.y, b.y)),
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@ -91,17 +98,34 @@ const Buffer = struct {
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}
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};
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fn handleActive(win: mfb.Window(State), isActive: bool) void {
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// win.getUserData().?.*.active = isActive;
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var data = win.getUserData();
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std.log.info("got data", .{});
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if (data) |value| {
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// value.*.active = isActive;
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_ = value;
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}
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if (isActive) {
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std.log.info("activated!!!!!!!!!!!!", .{});
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} else {
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std.log.info("deactivated", .{});
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}
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}
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pub fn main() !void {
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var gp_allocator = std.heap.GeneralPurposeAllocator(.{}){};
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const alloc = &gp_allocator.allocator;
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const alloc = gp_allocator.allocator();
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var state = try State.init(3);
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var state = try State.init(alloc, 3);
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defer state.deinit();
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var win = mfb.Window(State).open("Hello minifb-zig", Width, Height, .{.resizable=true}) catch unreachable;
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var win = mfb.Window(State).open("Hello minifb-zig", Width, Height, .{ .resizable = true, .alwaysOnTop = true }) catch unreachable;
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mfb.setTargetFPS(7);
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win.setUserData(&state);
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win.setActiveCallback(handleActive);
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var buf = try Buffer.init(alloc, Width, Height);
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defer buf.deinit();
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@ -109,6 +133,7 @@ pub fn main() !void {
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if (aliasedState) |value| {
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std.log.info("Period: {d}", .{value.*.period});
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}
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state.render(buf);
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while (win.waitSync()) {
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state.render(buf);
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