tamamo/src/tframe.zig

const sh0rk = @import("./sh0rk.zig");
const w4 = @import("./wasm4.zig");
const sprites = @import("./sprites.zig");

pub var enabled: bool = false;
var curr_text: []const u8 = undefined;
var text_index: usize = 0;
var text_counter: u4 = 0;

fn frame() void {
    w4.m.colors.* = .{
        ._0 = .p0,
        ._1 = .p1,
        ._2 = .p2,
        ._3 = .p3,
    };

    w4.blitSub(
        &sprites.frame,
        0,
        128,
        8,
        8,
        0,
        0,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        152,
        128,
        8,
        8,
        16,
        0,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        0,
        136,
        8,
        8,
        0,
        8,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        152,
        144,
        8,
        8,
        16,
        8,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        152,
        136,
        8,
        8,
        16,
        8,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        0,
        144,
        8,
        8,
        0,
        8,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        0,
        152,
        8,
        8,
        0,
        16,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    w4.blitSub(
        &sprites.frame,
        152,
        152,
        8,
        8,
        16,
        16,
        sprites.frame_width,
        w4.BlitFlags{.two_bits = true},
    );

    var i: u8 = 0;
    while (i < 18) {
        defer i += 1;

        w4.blitSub(
            &sprites.frame,
            (i * 8) + 8,
            128,
            8,
            8,
            8,
            0,
            sprites.frame_width,
            w4.BlitFlags{.two_bits = true},
        );

        w4.blitSub(
            &sprites.frame,
            (i * 8) + 8,
            136,
            8,
            8,
            8,
            8,
            sprites.frame_width,
            w4.BlitFlags{.two_bits = true},
        );

        w4.blitSub(
            &sprites.frame,
            (i * 8) + 8,
            144,
            8,
            8,
            8,
            8,
            sprites.frame_width,
            w4.BlitFlags{.two_bits = true},
        );

        w4.blitSub(
            &sprites.frame,
            (i * 8) + 8,
            152,
            8,
            8,
            8,
            16,
            sprites.frame_width,
            w4.BlitFlags{.two_bits = true},
        );
    }
}

pub fn set_text(text: []const u8) void {
    enabled = true;
    curr_text = text;
    text_index = 0;
    text_counter = 15;
}

pub fn update(gamepad: w4.GamePad) void {
    frame();

    w4.m.colors._0 = .p3;
    w4.m.colors._1 = .transparent;
    w4.text(curr_text[0..text_index], 6, 132);

    if (gamepad.a) {
        w4.trace("dismissing");
        enabled = false;
        text_index = 0;
        curr_text = "";
    }

    if (text_index < curr_text.len) {
        text_counter -= 1;

        if (gamepad.b) {
            text_counter = 0;
        }

        if (text_counter == 0) {
            text_index += 1;
            text_counter = 4;
        }
    }
}