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-rw-r--r--src/inputs.zig27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/inputs.zig b/src/inputs.zig
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--- /dev/null
+++ b/src/inputs.zig
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+const std = @import("std");
+const w4 = @import("wasm4.zig");
+
+// This packed struct matches the buttons definitions in wasm4.zig
+// so that a bitCast can give us named fields
+pub const Buttons = packed struct {
+ x: bool = false,
+ y: bool = false,
+ _: u2,
+ left: bool = false,
+ right: bool = false,
+ up: bool = false,
+ down: bool = false,
+};
+
+pub const Gamepad = struct {
+ held: Buttons = .{},
+ pressed: Buttons = .{},
+ released: Buttons = .{},
+
+ pub fn update(self: *Gamepad, buttons: u8) void {
+ var previous = @bitCast(u8, self.held);
+ self.held = @bitCast(Buttons, buttons);
+ self.pressed = @bitCast(Buttons, buttons & (buttons ^ previous));
+ self.released = @bitCast(Buttons, previous & (buttons ^ previous));
+ }
+};