dynmap/web/js/minecraft.js

103 lines
2.8 KiB
JavaScript

var cloneCanvas = function(self) {
var c = document.createElement('canvas');
c.width = self.width;
c.height = self.height;
var cxt = c.getContext('2d');
cxt.drawImage(self,0,0);
return c;
};
function blitImage(ctx, image, sx ,sy, sw, sh, dx, dy, dw, dh) {
var x; var y;
for (x=0;x<dw;x++) {
for (y=0;y<dh;y++) {
ctx.drawImage(image,Math.floor(sx+x*(sw/dw)),Math.floor(sy+y*(sw/dw)),1,1,dx+x,dy+y,1,1);
}
}
}
function createMinecraftHead(player,completed,failed) {
var skinImage = new Image();
skinImage.onload = function() {
var headCanvas = document.createElement('canvas');
headCanvas.width = 8;
headCanvas.height = 8;
if(headCanvas.getContext) {
var headContext = headCanvas.getContext('2d');
blitImage(headContext, skinImage, 8,8,8,8, 0,0,8,8);
// Turn off accessory face overlay - causes white faces, and very few skins seem to have them anyway
//blitImage(headContext, skinImage, 40,8,8,8, 0,0,8,8);
completed(headCanvas);
}
else {
failed();
}
};
skinImage.onerror = function() {
if (skinImage.src == '//www.minecraft.net/img/char.png') {
failed();
} else {
skinImage.src = '//www.minecraft.net/img/char.png';
}
};
skinImage.src = '//s3.amazonaws.com/MinecraftSkins/' + player + '.png';
}
function resizeImage(img,size) {
var canvas = document.createElement('canvas');
canvas.width = size;
canvas.height = size;
var ctx = canvas.getContext('2d');
blitImage(ctx, img, 0,0,img.width,img.height, 0,0,size,size);
return canvas;
}
var playerHeads = {};
function getMinecraftHead(player,size,completed) {
var head = playerHeads[player];
// Synchronous
if (!completed) {
return (!head || head.working) ? null : head;
}
// Asynchronous
if (!head) {
playerHeads[player] = { working: true, hooks: [{f:completed,s:size}] };
//console.log('Creating head for ',player,'...');
createMinecraftHead(player, function(head) {
//console.log('Created head for ',player,': ', head);
hooks = playerHeads[player].hooks;
playerHeads[player] = head;
var i;
for(i=0;i<hooks.length;i++) {
hooks[i].f(resizeImage(head,hooks[i].s));
}
}, function() {
});
} else if (head.working) {
//console.log('Other process working on head of ',player,', will add myself to hooks...');
head.hooks[head.hooks.length] = {f:completed,s:size};
} else {
completed(resizeImage(head,size));
}
}
function getMinecraftTime(servertime) {
servertime = parseInt(servertime);
var day = servertime >= 0 && servertime < 13700;
return {
servertime: servertime,
days: parseInt((servertime+8000) / 24000),
// Assuming it is day at 8:00
hours: (parseInt(servertime / 1000)+8) % 24,
minutes: parseInt(((servertime / 1000) % 1) * 60),
seconds: parseInt(((((servertime / 1000) % 1) * 60) % 1) * 60),
day: day,
night: !day
};
}