https://git.spwbk.site/swatson/pico8/raw/master/shmup.html

https://git.spwbk.site/swatson/pico8/raw/master/shmup.html
___________________________________
<html><head>
<title>PICO-8 Cartridge</title>
<meta name="viewport" content="width=device-width, user-scalable=no">
<script type="text/javascript">

// Default shell for PICO-8 0.2.2 (includes @weeble's gamepad mod 1.0)
// This file is available under a CC0 license https://creativecommons.org/share-your-work/public-domain/cc0/
// (note: "this file" does not include any cartridge or cartridge artwork injected into a derivative html file when using the PICO-8 html exporter)

// options

// fullscreen, sound, close button at top when playing on touchscreen
var p8_allow_mobile_menu = true;

// p8_autoplay true to boot the cartridge automatically after page load when possible
// if the browser can not create an audio context outside of a user gesture (e.g. on iOS), p8_autoplay has no effect
var p8_autoplay = false;

// When pico8_state is defined, PICO-8 will set .is_paused, .sound_volume and .frame_number each frame
// (used for determining button icons)
var pico8_state = [];

// When pico8_buttons is defined, PICO-8 reads each int as a bitfield holding that player's button states
// 0x1 left, 0x2 right, 0x4 up, 0x8 right, 0x10 O, 0x20 X, 0x40 menu
// (used by p8_update_gamepads)
var pico8_buttons = [0, 0, 0, 0, 0, 0, 0, 0]; // max 8 players

// When pico8_mouse is defined, PICO-8 reads the 3 integers as X, Y and a bitfield for buttons: 0x1 LMB, 0x2 RMB
var pico8_mouse = [];

// used to display number of detected joysticks
var pico8_gamepads = {};
pico8_gamepads.count = 0;

// When pico8_gpio is defined, reading and writing to gpio pins will read and write to these values
var pico8_gpio = new Array(128);

// When pico8_audio_context context is defined, the html shell (this file) is responsible for creating and managing it.
// This makes satisfying browser requirements easier -- e.g. initialising audio from a short script in response to a user action.
// Otherwise PICO-8 will try to create and use its own context.

var pico8_audio_context;

// menu button and controller graphics
p8_gfx_dat={
"p8b_pause1": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAOUlEQVRIx2NgGPbg/8cX/0F46FtAM4vobgHVLRowC6hm0YBbQLFFoxaM4FQ0dHPy0C1Nh26NNugBAAnizNiMfvbGAAAAAElFTkSuQmCC",
"p8b_controls":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAQ0lEQVRIx2NgGAXEgP8fX/ynBaap4XBLhqcF1IyfYWQBrZLz0LEAlzqqxQFVLcAmT3MLqJqTaW7B4CqLaF4fjIIBBwBL/B2vqtPVIwAAAABJRU5ErkJggg==",
"p8b_full":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAN0lEQVRIx2NgGPLg/8cX/2mJ6WcBrUJm4CwgOSgGrQVEB8WoBaMWDGMLhm5OHnql6dCt0YY8AAA9oZm+9Z9xQAAAAABJRU5ErkJggg==",
"p8b_pause0":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAKUlEQVRIx2NgGHbg/8cX/7FhctWNWjBqwagFoxaMWjBqwagF5Fkw5AAAPaGZvsIUtXUAAAAASUVORK5CYII=",
"p8b_sound0":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAANklEQVRIx2NgGDHg/8cX/5Hx0LEA3cChYwEugwavBcRG4qgFoxYMZwuGfk4efqXp8KnRBj0AAMz7cLDnG4FeAAAAAElFTkSuQmCC",
"p8b_sound1":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAPUlEQVRIx2NgGDHg/8cX/5Hx0LEA3cChYwEugwhZQLQDqG4BsZFIKMhGLRi1YChbMPRz8vArTYdPjTboAQCSVgpXUWQAMAAAAABJRU5ErkJggg==",
"p8b_close":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAAAU0lEQVRIx2NkoDFgpJsF/z+++I8iwS9BkuW49A+cBcRaREgf/Swg1SJi1dHfAkIG4EyOOIJy4Cwg1iJCiWDUAvItGLqpaOjm5KFfmg79Gm3ItioAl+mAGVYIZUUAAAAASUVORK5CYII=",

"controls_left_panel":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAAEsCAYAAAB5fY51AAAEI0lEQVR42u3dMU7DQBCG0Tjam9DTcP8jpEmfswS5iHBhAsLxev/hvQY6pGXyZRTQ+nQCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHqbHEEtl+vt7hS+fLy/mXHBQqxEi/6aI/AiFW9SnB2BWDkDBAtAsADBAhAsAMECBAtAsAAECxAsAMECECxAsAAEC0CwONJ8tYvrXRAsImK19j0IFsPGSrQQLCJiNV+et7xAT7QQLIaN1dr3ooVgMWysRAvBIipWooVgERUr0UKwiIqVaCFYRMVKtBAsomIlWggWUbESLQSLqFiJFoJFVKxEC8EiKlaihWARFSvRQrDYJSSVfhaCBSBYAIIFCBbAHpoj4Bl/scOGBWDD4lX8iwE2LADBAgQLQLAABAsQLADBAhAsQLAABAtAsADBAhAsAMECBAtAsAAECxAsAMECECxAsAAECxAsAMECECxAsMh1ud7uTsHZVDcZyFo8Yt5sVJ6NyUAaSNEyIymaXwZepIKd4mwoQbAFC0CwAMECECwAwQIEC0CwAAQLECwAwQIQLECwAAQLQLAAwQI4UHME2/10QZq7usyBObBhRQwpmBUb1nADuPbuaUD/p2ezMH+1admwhosVfBcxb2SCJVaIlmAhVoiWYIkVoiVagiVWiJZgiZVYIVqCJVaIlmgJllghWoIlViBagiVWiJZoCZZYIVqCJVYgWoIlViBaggUIlnc0sPELlmghVmIlWKKFWAmWaIFYCZZoIVYIlmghVoIlWiBWgiVaiJVgIVqIlWCJFoiVYIkWYiVYiBZiJViihViJ1XbNEWyL1mMQRYvfvIGJlQ1rmE0LzIoNyyBiDrBhAYIFIFiAYAEIFoBgAYIFIFgAggUIFoBgAQgWIFgAggUgWIBgDc+Nn1D/tdH8YupwgZy5qG4ykKIlVmZDsDjshSlazqQqH7p793Q2CBaAYAGCBSBYAIIFCBaAYAEIFiBYAIIFIFiAYAEIFoBgAYIFIFgAggUIFoBgAQgWIFgAggUgWIBgAQgWwENzBKxZPub9CJ7WjA0LsGFRV+9N5+jNDhsWgGABggUgWACCxW56fgjuA3cEiz9Z/nWwR0iWP8P/YCFYDBstsUKwiIiWWCFYRERLrBAsIqIlVggWEdESKwSLiGiJFYJFRLTECsEiIlpihWARES2xQrCIiJZYIVhEREusECwioiVWCBYx0RIrBIuoaIkVr+YhFHTZtMCGBQgWgGABCBYgWACCBSBYgGABCBaAYAGCBSBYAIIFCBbj2uOR8s6AEbhexgsWYri3SKhKczcXAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMA2n+e0UMDzh3yTAAAAAElFTkSuQmCC",

"controls_right_panel":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAAAFeCAYAAAA/lyK/AAAKHklEQVR42u3dAZKaWBAGYE3tvfBmMCfDnGzWJLhLHHBGBt7rhu+rSiWbbAk8p3+7UeF0AgAAAAAAAAAAAOAQzpaAzN5vDlOsNwILhJXQSuIfP/YoZMGcxQ9LgLByfAILQGABAgtAYAEILEBgAQgsAIEFCCwAgQUgsACBBSCwAAQWILAABBYst/cL3LmA3/9ccRRFTRquZIigylKsrjwKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMZ0tAXz0/v7eLi6q8/nNCgos2CKYmttvl+E/uw02cX/M6y3IflpxgQVLu6fuScC8HDIP4ff08XVhwNMwuf3q3z9qvzP+fTUgh1+P+iHkAP4Li6mQairtTzO3T54tEFRhu5mZrk9wwYGDqo0+ds10XYILjhRUjgOI2J30ezqRvcdjAmH1dzeyu6KeCC7dFiQt5sMU8mMwe/YhV9cx1jhuQKehswRWCKvm4GvRCC3I0VUYhT6GlvNaIKyEFiCshBYIK6EltKBuAQorawYKz9oBaxWct+uXraGPf0ChYuudh7GOkKkzUGTrhpZOFTYcBY0x1hR0A7pWQFF5MYDDFJSxpdBoaDVgp93Vk3sJzmmjdjF76rLc+Zmq3dXvH8KbKCF1+nPn5svDP12HX1Om/v9fukh3d4621pC1u2oD7cv4+vDtwscJeZ/BSOsNKbur2udVtrqlVtT7DDqXBQlf7aduo1UoFPsjrzvorpaFVdGbOUwEZHPEtYeMYdXU6jZqXzcqQmiN9sHHSOCFsaQpvN0mSIdT9WoKo3UwFkLEkSTaZWtqh6exEIK+uke9xta40zpKlwvGwc+32Qf+NH2VfTMWQsBRJMMXq2t9bcZYCF8rkrZ0UUYefWp9Ofke5tl+hn4oI0oVSOnOZfjjr+/0/Yy6LsO+XWusUa1tQorAKjwOphp5KnVZzmNB7YLM+BWUGvvsPBY8L45eIc7uc/FvANxP+GdaJ+ewKOm602192+hc1sUaCSwqjzsVtnVNuFTX0utVY3sCiyxdxNset5V1nzOukcBibzrHsF8CC6EVcCxEYIHAElgAAgtAYAECC0BgAQgsiOdiCQQWx9IJLIEFwsoxCCxYW8YL07mYnsDiYAU5+kJvxtHq8nAMAhIqhVWxq2m6gN/XA8sF/OCTDqKALmEHcV+b6w6fD0jZYbkJRaD9zdiJ6rAopSu8vWuWLmt8S7IDPC+QooNo3Uh1ch+r3kjViXd4HiBthaJ0q/qZtfFTCZ90PJUCoQ+4HtX2zT0J4esdT1Nwm81oNGwDrsV7hW03xkEIWijRQuthf5oK22+jn9uDw46FEUJiqrOqtR/GQUjw6v4QWjXOG/UBwso4CAsKpq+8/WLBMWyzD9Lh9cZBSDSSTARIv+G22ppdnXEQ1iviNsh+rHpCfgjETR57D+sOuqx1g6tfUtTD4/TRgmpP3dVZ6VArJE5/vsfWlbr+0xf36XL6eBWD62n+KgpT//8p0nFFXW+BRbou6/cP4U3QQD2dvv7l4G44ljdrDTvtsqJ/128n69w7dwUrvfJ7m33T9W28Mwi6LN0VKCq8GECSscVoaE1BN6BrBTYqMqFlHSHVGKMz+F6nahSEwqGl4KwdKDxrBqxZgL0CXBRWzluB0BJWgNASViC0hBVQr0C9XT8dVj7+AQlCqz/oGvTCCnJ2F4fpto563KDT0FkCtQt5b13HxO3IjICws6JOH1x7PCZgvttK243s5TiAhQUfvTuJeuNVoF5whRurJkY/QQWC64NqXddMNyWogE+7mXt4tRtvu50JKSfTX+QusByy6xr+2E388/jvrufz+ecroXj6+7b1s4+f+XbxAmv/hfH6E+MHuljnNQqZboNNdEvCD4Hlhx4vNgLLWGGsAEJ2Uk7cAuG7KW+NA9mCyocPgfBB5esdQPygchxAxO7EJUqAVN2Ii8ABYYvZZXaBFF2HGxkYEUGnobME1g4rN+MUWpCiqzAKndzuHISV0AKEldACYYXQgmAFKKysGSg8awesVXDerl+2hj7+AYWKrXcexjpCps5Aka0bWjpV2HAUNMZYU9AN6FoBReXFAA5TUMaWQqOh1YBA3dWeinLNY9FlwYrdVdTH28u67GltyOtH9u5q+GO31mOeb7J3Wvd9vx/LirqHdQcivOJn7Sa23m9dFjqsIN1V9k5rw85KlwUZXumzdBQl91OXhQ7rtYK5f3zhuvW2MnRahTqrsevD8wAC64nLluNgptCqEFbjdb8oIQg6kkQbhWruj7EQHdZr42BXetuROq1KndWHLstYiMD62jh4rbHxCKEVIKzG628shOijiLHUWIgO66VxpKYanVaQzirU84DAitxdhfqwYsnQChhWYZ8XBFYot5p9O1JoRQ2rSM8DROywwp4z2Wrfop8nch4LHdZz16Bd3+qdVuQxMPrzgcBSIAVDK0lYCSwE1kwBpzixu0ZoJQqrdM8PAqt0ILwl2MfFoZUtrJx4R2DtwJLQythZgcA6YGgJKxBYKUJLWIHAShFawgoEVorQElYgsFKElrACgZUmtIQVCKzwpkZCQGCFDavzQGiBwAofVo8jodACgRU6rIQWCKxUYSW0YOeBlemqAK98dCFraLlKAwJruqDfkhXyy5+zytxpuWoDAmvaZY9hlTi0LsoIZoIgeiGvtY9ZrpXumu7osOZ1e+2skndanVJCYM0HQxtwn1b/bmD00HLCHYH1vIDfghbuZl9kztBpOeEOT8IhUvGW2p+I54qcv0KH9bluKJZmz51V9E5rtP6dMkJgzbsOv1+OElZBQ+vy8HwAEUeRo2/fOIgOK8lYGOFKobU7LeMgvFgwwwt8f+Suotb+/Fr3YdONn0YIWKxRR6Aa+2UcxEi4fCxsSxRo7TEwyng4Wm/jIER7pfedPt0VOqwUXVamW3GV6LR0VxD0FT9rJ7Hlfuuu0GGt12X1axZmls6qVKc1Wl/dFazxyr/G2+x76SLWPI7Rx0h0V7BCQbVrfS5rT0W5YmDdP3flcjKgqI7xYgBMjC0+gW1NQTegawU2KjKhZR0h1RijM/hep2oUhMKhpeCsHSg8awasWYC9AlwUVs5bgdASVoDQElYgtIQVUK9AvV0/HVY+/gEJQqs/6Br0wgpydheH6baOetyg09BZArULeW9dx9BVGQFhx0WdPrj2eEzAfLeVthvZy3EACws+encydFSCCgRX3LFqYvQTVCC4PqjWdc10U4IK+LSbuYdXu/G225mQcjKdwzhbguUBMvyxm/jn8d9dz+fzz1dC8fbbZeax/vq72+O+eSYQWLzceY1CpttgE92S8AOBxZIu7PUnRvcEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACwwL/cvBIh09+hJAAAAABJRU5ErkJggg==",

};

// added 0.2.1: work-around for iOS/Safari running from an iFrame (e.g. from itch.io page):
// touch events only register after adding dummy listeners on document.

document.addEventListener('touchstart', {});
document.addEventListener('touchmove', {});
document.addEventListener('touchend', {});

// --------------------------------------------------------------------------------------------------------------------------------
// pico-8 0.2.2: allow dropping files
var p8_dropped_cart = null;
var p8_dropped_cart_name = "";
function p8_drop_file(e)
{
// console.log("@@ dropping file...");

e.stopPropagation();
e.preventDefault();

if (e.dataTransfer && e.dataTransfer.files && e.dataTransfer.files[0])
{
// read from file
reader = new FileReader();
reader.onload = function (event) {
p8_dropped_cart_name = e.dataTransfer.files[0].name;
p8_dropped_cart = reader.result;
// data:image/png;base64
e.stopPropagation();
e.preventDefault();
};
reader.readAsDataURL(e.dataTransfer.files[0]);
codo_command = 9; // read directly from p8_dropped_cart with libb64 decoder
}
else
{
// read from url (or data url)
txt = e.dataTransfer.getData('Text');
if (txt){
p8_dropped_cart_name = "untitled.p8.png";
p8_dropped_cart = txt;
codo_command = 9;
}
}
}
function nop(evt) {
evt.stopPropagation();
evt.preventDefault();
}
function dragover(evt) {
evt.stopPropagation();
evt.preventDefault();
Module.pico8DragOver();
}
function dragstop(evt) {
evt.stopPropagation();
evt.preventDefault();
Module.pico8DragStop();
}
// --------------------------------------------------------------------------------------------------------------------------------

var p8_buttons_hash = -1;
function p8_update_button_icons()
{
// buttons only appear when running
if (!p8_is_running)
{
requestAnimationFrame(p8_update_button_icons);
return;
}
var is_fullscreen=(document.fullscreenElement || document.mozFullScreenElement || document.webkitIsFullScreen || document.msFullscreenElement);

// hash based on: pico8_state.sound_volume pico8_state.is_paused bottom_margin left is_fullscreen p8_touch_detected
var hash = 0;
hash = pico8_state.sound_volume;
if (pico8_state.is_paused) hash += 0x100;
if (p8_touch_detected) hash += 0x200;
if (is_fullscreen) hash += 0x400;

if (p8_buttons_hash == hash)
{
requestAnimationFrame(p8_update_button_icons);
return;
}

p8_buttons_hash = hash;
// console.log("@@ updating button icons");

els = document.getElementsByClassName('p8_menu_button');
for (i = 0; i < els.length; i++)
{
el = els[i];
index = el.id;
if (index == 'p8b_sound') index += (pico8_state.sound_volume == 0 ? "0" : "1"); // 1 if undefined
if (index == 'p8b_pause') index += (pico8_state.is_paused > 0 ? "1" : "0"); // 0 if undefined

new_str = '<img width=24 height=24 style="pointer-events:none" src="'+p8_gfx_dat[index]+'">';
if (el.innerHTML != new_str)
el.innerHTML = new_str;

// hide all buttons for touch mode (can pause with menu buttons)

var is_visible = p8_is_running;

if ((!p8_touch_detected || !p8_allow_mobile_menu) && el.parentElement.id == "p8_menu_buttons_touch")
is_visible = false;

if (p8_touch_detected && el.parentElement.id == "p8_menu_buttons")
is_visible = false;

if (is_fullscreen)
is_visible = false;

if (is_visible)
el.style.display="";
else
el.style.display="none";
}
requestAnimationFrame(p8_update_button_icons);
}

function abs(x)
{
return x < 0 ? -x : x;
}

// step 0 down 1 drag 2 up (not used)
function pico8_buttons_event(e, step)
{
if (!p8_is_running) return;

pico8_buttons[0] = 0;

if (step == 2 && typeof(pico8_mouse) !== 'undefined')
{
pico8_mouse[2] = 0;
}

var num = 0;
if (e.touches) num = e.touches.length;

if (num == 0 && typeof(pico8_mouse) !== 'undefined')
{
// no active touches: release mouse button from anywhere on page. (maybe redundant? but just in case)
pico8_mouse[2] = 0;
}

for (var i = 0; i < num; i++)
{
var touch = e.touches[i];
var x = touch.clientX;
var y = touch.clientY;
var w = window.innerWidth;
var h = window.innerHeight;

var r = Math.min(w,h) / 12;
if (r > 40) r = 40;

// mouse (0.1.12d)

let canvas = document.getElementById("canvas");
if (p8_touch_detected)
if (typeof(pico8_mouse) !== 'undefined')
if (canvas)
{
var rect = canvas.getBoundingClientRect();
//console.log(rect.top, rect.right, rect.bottom, rect.left, x, y);

if (x >= rect.left && x < rect.right && y >= rect.top && y < rect.bottom)
{
pico8_mouse = [
Math.floor((x - rect.left) * 128 / (rect.right - rect.left)),
Math.floor((y - rect.top) * 128 / (rect.bottom - rect.top)),
step < 2 ? 1 : 0
];
// return; // commented -- blocks overlapping buttons
}else
{
pico8_mouse[2] = 0;
}
}

// buttons

b = 0;

if (y < h - r*8)
{
// no controller buttons up here; includes canvas and menu buttons at top in touch mode
}
else
{
e.preventDefault();

if ((y < h - r*6) && y > (h - r*8))
{
// menu button: half as high as X O button
// stretch across right-hand half above X O buttons
if (x > w - r*3)
b |= 0x40;
}
else if (x < w/2 && x < r*6)
{
// stick

mask = 0xf; // dpad
var cx = 0 + r*3;
var cy = h - r*3;

deadzone = r/3;
var dx = x - cx;
var dy = y - cy;

if (abs(dx) > abs(dy) * 0.6) // horizontal
{
if (dx < -deadzone) b |= 0x1;
if (dx > deadzone) b |= 0x2;
}
if (abs(dy) > abs(dx) * 0.6) // vertical
{
if (dy < -deadzone) b |= 0x4;
if (dy > deadzone) b |= 0x8;
}
}
else if (x > w - r*6)
{
// button; diagonal split from bottom right corner

mask = 0x30;

// one or both of [X], [O]
if ( (h-y) > (w-x) * 0.8) b |= 0x10;
if ( (w-x) > (h-y) * 0.8) b |= 0x20;
}
}

pico8_buttons[0] |= b;

}
}

// p8_update_layout_hash is used to decide when to update layout (expensive especially when part of a heavy page)
var p8_update_layout_hash = -1;
var last_windowed_container_height = 512;
var p8_layout_frames = 0;

function p8_update_layout()
{
var canvas = document.getElementById("canvas");
var p8_playarea = document.getElementById("p8_playarea");
var p8_container = document.getElementById("p8_container");
var p8_frame = document.getElementById("p8_frame");
var csize = 512;
var margin_top = 0;
var margin_left = 0;

// page didn't load yet? first call should be after p8_frame is created so that layout doesn't jump around.
if (!canvas || !p8_playarea || !p8_container || !p8_frame)
{
p8_update_layout_hash = -1;
requestAnimationFrame(p8_update_layout);
return;
}

p8_layout_frames ++;

// assumes frame doesn't have padding

var is_fullscreen=(document.fullscreenElement || document.mozFullScreenElement || document.webkitIsFullScreen || document.msFullscreenElement);
var frame_width = p8_frame.offsetWidth;
var frame_height = p8_frame.offsetHeight;

if (is_fullscreen)
{
// same as window
frame_width = window.innerWidth;
frame_height = window.innerHeight;
}
else{
// never larger than window // (happens when address bar is down in portraight mode on phone)
frame_width = Math.min(frame_width, window.innerWidth);
frame_height = Math.min(frame_height, window.innerHeight);
}

// as big as will fit in a frame..
csize = Math.min(frame_width,frame_height);

// .. but never more than 2/3 of longest side for touch (e.g. leave space for controls on iPad)
if (p8_touch_detected && p8_is_running)
{
var longest_side = Math.max(window.innerWidth,window.innerHeight);
csize = Math.min(csize, longest_side * 2/3);
}

// pixel perfect: quantize to closest multiple of 128
// only when large display (desktop)
if (frame_width >= 512 && frame_height >= 512)
{
csize = (csize+1) & ~0x7f;
}

// csize should never be higher than parent frame
// (otherwise stretched large when fullscreen and then return)
if (!is_fullscreen && p8_frame)
csize = Math.min(csize, last_windowed_container_height); // p8_frame_0 parent

if (is_fullscreen)
{
// always center horizontally
margin_left = (frame_width - csize)/2;

if (p8_touch_detected)
{
if (window.innerWidth < window.innerHeight)
{
// portrait: keep at y=40 (avoid rounded top corners / camera nub thing etc.)
margin_top = Math.min(40, frame_height - csize);
}
else
{
// landscape: put a little above vertical center
margin_top = (frame_height - csize)/4;
}
}
else{
// non-touch: center vertically
margin_top = (frame_height - csize)/2;
}
}

// skip if relevant state has not changed

var update_hash = csize + margin_top * 1000.3 + margin_left * 0.001 + frame_width * 333.33 + frame_height * 772.15134;
if (is_fullscreen) update_hash += 0.1237;

// unexpected things can happen in the first few seconds, so just keep re-calculating layout. wasm version breaks layout otherwise.
// also: bonus refresh at 5, 8 seconds just in case ._.
if (p8_layout_frames < 180 || p8_layout_frames == 60*5 || p8_layout_frames == 60*8 )
update_hash = p8_layout_frames;

if (!is_fullscreen) // fullscreen: update every frame for safety. should be cheap!
if (!p8_touch_detected) // mobile: update every frame because nothing can be trusted
if (p8_update_layout_hash == update_hash)
{
//console.log("p8_update_layout(): skipping");
requestAnimationFrame(p8_update_layout);
return;
}
p8_update_layout_hash = update_hash;

// record this for returning to original size after fullscreen pushes out container height (argh)
if (!is_fullscreen && p8_frame)
last_windowed_container_height = p8_frame.parentNode.parentNode.offsetHeight;

// mobile in portrait mode: put screen at top (w / a little extra space for fullscreen button if needed)
// (don't cart too about buttons overlapping screen)
if (p8_touch_detected && p8_is_running && document.body.clientWidth < document.body.clientHeight)
p8_playarea.style.marginTop = p8_allow_mobile_menu ? 32 : 8;
else if (p8_touch_detected && p8_is_running) // landscape: slightly above vertical center (only relevant for iPad / highres devices)
p8_playarea.style.marginTop = (document.body.clientHeight - csize) / 4;
else
p8_playarea.style.marginTop = "";

canvas.style.width = csize;
canvas.style.height = csize;

// to do: this should just happen from css layout
canvas.style.marginLeft = margin_left;
canvas.style.marginTop = margin_top;

p8_container.style.width = csize;
p8_container.style.height = csize;

// set menu buttons position to bottom right
el = document.getElementById("p8_menu_buttons");
el.style.marginTop = csize - el.offsetHeight;

if (p8_touch_detected && p8_is_running)
{
// turn off pointer events to prevent double-tap zoom etc (works on Android)
// don't want this for desktop because breaks mouse input & click-to-focus when using codo_textarea
canvas.style.pointerEvents = "none";

p8_container.style.marginTop = "0px";

// buttons

// same as touch event handling
var w = window.innerWidth;
var h = window.innerHeight;
var r = Math.min(w,h) / 12;

if (r > 40) r = 40;

el = document.getElementById("controls_right_panel");
el.style.left = w-r*6;
el.style.top = h-r*7;
el.style.width = r*6;
el.style.height = r*7;
if (el.getAttribute("src") != p8_gfx_dat["controls_right_panel"]) // optimisation: avoid reload? (browser should handle though)
el.setAttribute("src", p8_gfx_dat["controls_right_panel"]);

el = document.getElementById("controls_left_panel");
el.style.left = 0;
el.style.top = h-r*6;
el.style.width = r*6;
el.style.height = r*6;
if (el.getAttribute("src") != p8_gfx_dat["controls_left_panel"]) // optimisation: avoid reload? (browser should handle though)
el.setAttribute("src", p8_gfx_dat["controls_left_panel"]);

// scroll to cart (commented; was a failed attempt to prevent scroll-on-drag on some browsers)
// p8_frame.scrollIntoView(true);

document.getElementById("touch_controls_gfx").style.display="table";
document.getElementById("touch_controls_background").style.display="table";

}
else{
document.getElementById("touch_controls_gfx").style.display="none";
document.getElementById("touch_controls_background").style.display="none";
}

if (!p8_is_running)
{
p8_playarea.style.display="none";
p8_container.style.display="flex";
p8_container.style.marginTop="auto";

el = document.getElementById("p8_start_button");
if (el) el.style.display="flex";
}
requestAnimationFrame(p8_update_layout);
}

var p8_touch_detected = false;
addEventListener("touchstart", function(event)
{
p8_touch_detected = true;

// hide codo_textarea -- clipboard support on mobile is not feasible
el = document.getElementById("codo_textarea");
if (el && el.style.display != "none"){
el.style.display="none";
}

}, {passive: true});

function p8_create_audio_context()
{
if (pico8_audio_context)
{
try {
pico8_audio_context.resume();
}
catch(err) {
console.log("** pico8_audio_context.resume() failed");
}
return;
}

var webAudioAPI = window.AudioContext || window.webkitAudioContext || window.mozAudioContext || window.oAudioContext || window.msAudioContext;
if (webAudioAPI)
{
pico8_audio_context = new webAudioAPI;

// wake up iOS
if (pico8_audio_context)
{
try {
var dummy_source_sfx = pico8_audio_context.createBufferSource();
dummy_source_sfx.buffer = pico8_audio_context.createBuffer(1, 1, 22050); // dummy
dummy_source_sfx.connect(pico8_audio_context.destination);
dummy_source_sfx.start(1, 0.25); // gives InvalidStateError -- why? hasn't been played before
//dummy_source_sfx.noteOn(0); // deleteme
}
catch(err) {
console.log("** dummy_source_sfx.start(1, 0.25) failed");
}
}
}
}

function p8_close_cart()
{
// just reload page! used for touch buttons -- hard to roll back state
window.location.hash = ""; // triggers reload
}

var p8_is_running = false;
var p8_script = null;
var Module = null;
function p8_run_cart()
{
if (p8_is_running) return;
p8_is_running = true;

// touch: hide everything except p8_frame_0
if (p8_touch_detected)
{
el = document.getElementById("body_0");
el2 = document.getElementById("p8_frame_0");
if (el && el2)
{
el.style.display="none";
el.parentNode.appendChild(el2);
}
}

// create audio context and wake it up (for iOS -- needs happen inside touch event)
p8_create_audio_context();

// show touch elements
els = document.getElementsByClassName('p8_controller_area');
for (i = 0; i < els.length; i++)
els[i].style.display="";

// install touch events. These also serve to block scrolling / pinching / zooming on phones when p8_is_running
// moved event.preventDefault(); calls into pico8_buttons_event() (want to let top buttons pass through)
addEventListener("touchstart", function(event){ pico8_buttons_event(event, 0); }, {passive: false});
addEventListener("touchmove", function(event){ pico8_buttons_event(event, 1); }, {passive: false});
addEventListener("touchend", function(event){ pico8_buttons_event(event, 2); }, {passive: false});

// load and run script
e = document.createElement("script");
p8_script = e;
e.onload = function(){

// show canvas / menu buttons only after loading
el = document.getElementById("p8_playarea");
if (el) el.style.display="table";

if (typeof(p8_update_layout_hash) !== 'undefined')
p8_update_layout_hash = -77;
if (typeof(p8_buttons_hash) !== 'undefined')
p8_buttons_hash = -33;

}
e.type = "application/javascript";
e.src = "shmup.js";
e.id = "e_script";

document.body.appendChild(e); // load and run

// hide start button and show canvas / menu buttons. hide start button
el = document.getElementById("p8_start_button");
if (el) el.style.display="none";

// add #playing for touchscreen devices (allows back button to close)
// X button can also be used to trigger this
if (p8_touch_detected)
{
window.location.hash = "#playing";
window.onhashchange = function()
{
if (window.location.hash.search("playing") < 0)
window.location.reload();
}
}

// install drag&drop listeners
{
let canvas = p8_document().getElementById("canvas");
if (canvas)
{
canvas.addEventListener('dragenter', dragover, false);
canvas.addEventListener('dragover', dragover, false);
canvas.addEventListener('dragleave', dragstop, false);
canvas.addEventListener('drop', nop, false);
canvas.addEventListener('drop', p8_drop_file, false);
}
}
}

// Gamepad code

var P8_BUTTON_O = {action:'button', code: 0x10};
var P8_BUTTON_X = {action:'button', code: 0x20};
var P8_DPAD_LEFT = {action:'button', code: 0x1};
var P8_DPAD_RIGHT = {action:'button', code: 0x2};
var P8_DPAD_UP = {action:'button', code: 0x4};
var P8_DPAD_DOWN = {action:'button', code: 0x8};
var P8_MENU = {action:'menu'};
var P8_NO_ACTION = {action:'none'};

var P8_BUTTON_MAPPING = [
// ref: https://w3c.github.io/gamepad/#remapping
P8_BUTTON_O, // Bottom face button
P8_BUTTON_X, // Right face button
P8_BUTTON_X, // Left face button
P8_BUTTON_O, // Top face button
P8_NO_ACTION, // Near left shoulder button (L1)
P8_NO_ACTION, // Near right shoulder button (R1)
P8_NO_ACTION, // Far left shoulder button (L2)
P8_NO_ACTION, // Far right shoulder button (R2)
P8_MENU, // Left auxiliary button (select)
P8_MENU, // Right auxiliary button (start)
P8_NO_ACTION, // Left stick button
P8_NO_ACTION, // Right stick button
P8_DPAD_UP, // Dpad up
P8_DPAD_DOWN, // Dpad down
P8_DPAD_LEFT, // Dpad left
P8_DPAD_RIGHT, // Dpad right
];

// Track which player is controller by each gamepad. Gamepad index i controls the
// player with index pico8_gamepads_mapping[i]. Gamepads with null player are
// currently unassigned - they get assigned to a player when a button is pressed.
var pico8_gamepads_mapping = [];

function p8_unassign_gamepad(gamepad_index) {
if (pico8_gamepads_mapping[gamepad_index] == null) {
return;
}
pico8_buttons[pico8_gamepads_mapping[gamepad_index]] = 0;
pico8_gamepads_mapping[gamepad_index] = null;
}

function p8_first_player_without_gamepad(max_players) {
var allocated_players = pico8_gamepads_mapping.filter(function(x) { return x != null; });
var sorted_players = Array.from(allocated_players).sort();
for (var desired = 0; desired < sorted_players.length && desired < max_players; ++desired) {
if (desired != sorted_players[desired]) {
return desired;
}
}
if (sorted_players.length < max_players) {
return sorted_players.length;
}
return null;
}

function p8_assign_gamepad_to_player(gamepad_index, player_index) {
p8_unassign_gamepad(gamepad_index);
pico8_gamepads_mapping[gamepad_index] = player_index;
}

function p8_convert_standard_gamepad_to_button_state(gamepad, axis_threshold, button_threshold) {
// Given a gamepad object, return:
// {
// button_state: the binary encoded Pico 8 button state
// menu_button: true if any menu-mapped button was pressed
// any_button: true if any button was pressed, including d-pad
// buttons and unmapped buttons
// }
if (!gamepad || !gamepad.axes || !gamepad.buttons) {
return {
button_state: 0,
menu_button: false,
any_button: false
};
}
function button_state_from_axis(axis, low_state, high_state, default_state) {
if (axis && axis < -axis_threshold) return low_state;
if (axis && axis > axis_threshold) return high_state;
return default_state;
}
var axes_actions = [
button_state_from_axis(gamepad.axes[0], P8_DPAD_LEFT, P8_DPAD_RIGHT, P8_NO_ACTION),
button_state_from_axis(gamepad.axes[1], P8_DPAD_UP, P8_DPAD_DOWN, P8_NO_ACTION),
];

var button_actions = gamepad.buttons.map(function (button, index) {
var pressed = button.value > button_threshold || button.pressed;
if (!pressed) return P8_NO_ACTION;
return P8_BUTTON_MAPPING[index] || P8_NO_ACTION;
});

var all_actions = axes_actions.concat(button_actions);

var menu_button = button_actions.some(function (action) { return action.action == 'menu'; });
var button_state = (all_actions
.filter(function (a) { return a.action == 'button'; })
.map(function (a) { return a.code; })
.reduce(function (result, code) { return result | code; }, 0)
);
var any_button = gamepad.buttons.some(function (button) {
return button.value > button_threshold || button.pressed;
});

any_button |= button_state; //jww: include axes 0,1 as might be first intended action

return {
button_state,
menu_button,
any_button
};
}

// jww: pico-8 0.2.1 version for unmapped gamepads, following p8_convert_standard_gamepad_to_button_state
// axes 0,1 & buttons 0,1,2,3 are reasonably safe. don't try to read dpad.
// menu buttons are unpredictable, but use 6..8 anyway (better to have a weird menu button than none)

function p8_convert_unmapped_gamepad_to_button_state(gamepad, axis_threshold, button_threshold) {

if (!gamepad || !gamepad.axes || !gamepad.buttons) {
return {
button_state: 0,
menu_button: false,
any_button: false
};
}

var button_state = 0;

if (gamepad.axes[0] && gamepad.axes[0] < -axis_threshold) button_state |= 0x1;
if (gamepad.axes[0] && gamepad.axes[0] > axis_threshold) button_state |= 0x2;
if (gamepad.axes[1] && gamepad.axes[1] < -axis_threshold) button_state |= 0x4;
if (gamepad.axes[1] && gamepad.axes[1] > axis_threshold) button_state |= 0x8;

// buttons: first 4 taken to be O/X, 6..8 taken to be menu button

for (j = 0; j < gamepad.buttons.length; j++)
if (gamepad.buttons[j].value > 0 || gamepad.buttons[j].pressed)
{
if (j < 4)
button_state |= (0x10 << (((j+1)/2)&1)); // 0 1 1 0 -- A,X -> O,X on xbox360
else if (j >= 6 && j <= 8)
button_state |= 0x40;
}

var menu_button = button_state & 0x40;

var any_button = gamepad.buttons.some(function (button) {
return button.value > button_threshold || button.pressed;
});

any_button |= button_state; //jww: include axes 0,1 as might be first intended action

return {
button_state,
menu_button,
any_button
};
}

// gamepad https://developer.mozilla.org/en-US/docs/Web/API/Gamepad_API/Using_the_Gamepad_API
// (sets bits in pico8_buttons[])
function p8_update_gamepads() {
var axis_threshold = 0.3;
var button_threshold = 0.5; // Should be unnecessary, we should be able to trust .pressed
var max_players = 8;
var gps = navigator.getGamepads() || navigator.webkitGetGamepads();

if (!gps) return;

// In Chrome, gps is iterable but it's not an array.
gps = Array.from(gps);

pico8_gamepads.count = gps.length;
while (gps.length > pico8_gamepads_mapping.length) {
pico8_gamepads_mapping.push(null);
}

var menu_button = false;
var gamepad_states = gps.map(function (gp) {
return (gp && gp.mapping == "standard") ?
p8_convert_standard_gamepad_to_button_state(gp, axis_threshold, button_threshold) :
p8_convert_unmapped_gamepad_to_button_state(gp, axis_threshold, button_threshold);
});

// Unassign disconnected gamepads.
// gps.forEach(function (gp, i) { if (gp && !gp.connected) { p8_unassign_gamepad(i); }});
gps.forEach(function (gp, i) { if (!gp || !gp.connected) { p8_unassign_gamepad(i); }}); // https://www.lexaloffle.com/bbs/?pid=87132#p

// Assign unassigned gamepads when any button is pressed.
gamepad_states.forEach(function (state, i) {
if (state.any_button && pico8_gamepads_mapping[i] == null) {
var first_free_player = p8_first_player_without_gamepad(max_players);
p8_assign_gamepad_to_player(i, first_free_player);
}
});

// Update pico8_buttons array.
gamepad_states.forEach(function (gamepad_state, i) {
if (pico8_gamepads_mapping[i] != null) {
pico8_buttons[pico8_gamepads_mapping[i]] = gamepad_state.button_state;
}
});

// Update menu button.
// Pico 8 only recognises the menu button on the first player, so we
// press it when any gamepad has pressed a button mapped to menu.
if (gamepad_states.some(function (state) { return state.menu_button; })) {
pico8_buttons[0] |= 0x40;
}

requestAnimationFrame(p8_update_gamepads);
}
requestAnimationFrame(p8_update_gamepads);

// End of gamepad code

// key blocker. prevent cursor keys from scrolling page while playing cart.
// also don't act on M, R so that can mute / reset cart
document.addEventListener('keydown',
function (event) {
event = event || window.event;
if (!p8_is_running) return;
if (pico8_state.has_focus == 1)
if ([32, 37, 38, 39, 40, 77, 82, 80, 9].indexOf(event.keyCode) > -1) // block cursors, M R P, tab
if (event.preventDefault) event.preventDefault();
},{passive: false});

// when using codo_textarea to determine focus, need to explicitly hand focus back when clicking a p8_menu_button
function p8_give_focus()
{
el = (typeof codo_textarea === 'undefined') ? document.getElementById("codo_textarea") : codo_textarea;
if (el)
{
el.focus();
el.select();
}
}

function p8_request_fullscreen() {

var is_fullscreen=(document.fullscreenElement || document.mozFullScreenElement || document.webkitIsFullScreen || document.msFullscreenElement);

if (is_fullscreen)
{
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
return;
}

var el = document.getElementById("p8_playarea");

if ( el.requestFullscreen ) {
el.requestFullscreen();
} else if ( el.mozRequestFullScreen ) {
el.mozRequestFullScreen();
} else if ( el.webkitRequestFullScreen ) {
el.webkitRequestFullScreen( Element.ALLOW_KEYBOARD_INPUT );
}
}

</script>

<STYLE TYPE="text/css">

</STYLE>

</head>

<body style="padding:0px; margin:0px; background-color:#222; color:#ccc">
<div id="body_0"> 



<div id="p8_frame_0" style="max-width:800px; max-height:800px; margin:auto;"> 
<div id="p8_frame" style="display:flex; width:100%; max-width:95vw; height:100vw; max-height:95vh; margin:auto;">

<div id="p8_menu_buttons_touch" style="position:absolute; width:100%; z-index:10; left:0px;">
<div class="p8_menu_button" id="p8b_full" style="float:left;margin-left:10px" onClick="p8_give_focus(); p8_request_fullscreen();"></div>
<div class="p8_menu_button" id="p8b_sound" style="float:left;margin-left:10px" onClick="p8_give_focus(); p8_create_audio_context(); Module.pico8ToggleSound();"></div>
<div class="p8_menu_button" id="p8b_close" style="float:right; margin-right:10px" onClick="p8_close_cart();"></div>
</div>

<div id="p8_container"
style="margin:auto; display:table;"
onclick="p8_create_audio_context(); p8_run_cart();">

<div id="p8_start_button" class="p8_start_button" style="width:100%; height:100%; display:flex;">
<img width=80 height=80 style="margin:auto;"
src="data:image/png;base64,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"/>
</div>

<div id="p8_playarea" style="display:none; margin:auto;
-webkit-user-select:none; -moz-user-select: none; user-select: none; -webkit-touch-callout:none;
">

<div id="touch_controls_background"
style=" pointer-events:none; display:none; background-color:#000;
position:fixed; top:0px; left:0px; border:0; width:100vw; height:100vh">
&nbsp
</div>

<div style="display:flex; position:relative">

<canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault();" >
</canvas>
<div class=p8_menu_buttons id="p8_menu_buttons" style="margin-left:10px;">
<div class="p8_menu_button" style="position:absolute; bottom:125px" id="p8b_controls" onClick="p8_give_focus(); Module.pico8ToggleControlMenu();"></div>
<div class="p8_menu_button" style="position:absolute; bottom:90px" id="p8b_pause" onClick="p8_give_focus(); Module.pico8TogglePaused(); p8_update_layout_hash = -22;"></div>
<div class="p8_menu_button" style="position:absolute; bottom:55px" id="p8b_sound" onClick="p8_give_focus(); p8_create_audio_context(); Module.pico8ToggleSound();"></div>
<div class="p8_menu_button" style="position:absolute; bottom:20px" id="p8b_full" onClick="p8_give_focus(); p8_request_fullscreen();"></div>
</div>
</div>


<div id="touch_controls_gfx"
style=" pointer-events:none; display:table;
position:fixed; top:0px; left:0px; border:0; width:100vw; height:100vh">

<img src="" id="controls_right_panel" style="position:absolute; opacity:0.5;">
<img src="" id="controls_left_panel" style="position:absolute; opacity:0.5;">

</div> 



<textarea id="codo_textarea" class="emscripten" style="display:none; position:absolute; left:-9999px; height:0px; overflow:hidden"></textarea>

</div> 

</div> 

</div> 
</div> 

<script type="text/javascript">

p8_update_layout();
p8_update_button_icons();

var canvas = document.getElementById("canvas");
Module = {};
Module.canvas = canvas;

// from @ultrabrite's shell: test if an AudioContext can be created outside of an event callback.
// If it can't be created, then require pressing the start button to run the cartridge

if (p8_autoplay)
{
var temp_context = new AudioContext();
temp_context.onstatechange = function ()
{
if (temp_context.state=='running')
{
p8_run_cart();
temp_context.close();
}
};
}

// pointer lock request needs to be inside a canvas interaction event
// pico8_state.request_pointer_lock is true when 0x5f2d bit 0 and bit 2 are set -- poke(0x5f2d,0x5)
// note on mouse acceleration for future: // https://github.com/w3c/pointerlock/pull/49
canvas.addEventListener("click", function()
{
if (!p8_touch_detected)
if (pico8_state.request_pointer_lock)
canvas.requestPointerLock();
});

</script>



</div> 
</body></html>