Added timers
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efba4456e7
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@ -63,3 +63,40 @@ test "set and get target 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 fn init() !Timer {
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const ctimer: ?*minifb_c.mfb_timer = minifb_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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return error.ItBroke;
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}
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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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}
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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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}
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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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}
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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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}
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pub fn getFrequency() f64 {
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return minifb_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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}
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};
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62
src/main.zig
62
src/main.zig
@ -16,14 +16,33 @@ const Coords = struct {
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};
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const State = struct {
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bgValue: u8,
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increasing: bool,
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};
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period: f64,
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bgValue: u8 = 0,
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increasing: bool = true,
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timer: mfb.Timer,
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fn render(buf: Buffer, state: State) void {
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buf.drawRectangle(.{.x=0,.y=0}, .{.x=Width, .y=Height}, grey(state.bgValue));
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pub fn init(period: f64) !State {
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const 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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};
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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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}
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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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if (bgValue >= 256) {
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bgValue = 512 - bgValue;
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}
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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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}
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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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@ -31,7 +50,7 @@ const Buffer = struct {
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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) anyerror!Buffer {
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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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return Buffer {
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.alloc=alloc,
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@ -73,38 +92,23 @@ const Buffer = struct {
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}
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};
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pub fn main() anyerror!void {
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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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std.log.info("All your codebase are belong to us.", .{});
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var win = mfb.Window.open("Hello minifb-zig", Width, Height) catch unreachable;
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mfb.setTargetFPS(60);
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mfb.setTargetFPS(7);
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var state = try State.init(3);
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defer state.deinit();
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var state = State {
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.increasing=true,
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.bgValue=0,
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};
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var buf = try Buffer.init(alloc, Width, Height);
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defer buf.deinit();
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render(buf, state);
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state.render(buf);
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while (win.waitSync()) {
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if (state.increasing) {
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if (state.bgValue < 255) {
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state.bgValue += 1;
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} else {
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state.increasing = false;
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}
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} else {
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if (state.bgValue > 0) {
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state.bgValue -= 1;
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} else {
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state.increasing = true;
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}
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}
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render(buf, state);
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state.render(buf);
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// TODO Handle mfb state
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_ = win.update(buf.slice) catch unreachable;
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}
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