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// Image generator from SHA512SUM to 256px*256px canvas
//
// Kaotisk Hund - 2024
//
// @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL v3.0
//
export function generateImage(hash, what)
{
var pixels = [];
var yi = 0;
var xi = 0;
for ( var y = 0; y < 256; ++y ){
pixels[y] = [];
for ( var x = 0; x < 256; ++x )
{
pixels[y][x] = '#000';
}
}
var z = 1;
for ( var y = 0; y < 256; ++y )
{
yi = y - 128;
for ( var x = 0; x < 256; ++x )
{
var pixel;
xi = x - 128;
z=Math.abs(Math.floor((yi*yi+xi*xi)/3));
//z=Math.abs(Math.floor((xi*yi)/1));
var r1 = hash[z] === undefined ?'0':hash[z];
var r2 = hash[z+1] === undefined ?'0':hash[z+1];
var g1 = hash[z+2] === undefined ?'0':hash[z+2];
var g2 = hash[z+3] === undefined ?'0':hash[z+3];
var b1 = hash[z+4] === undefined ?'0':hash[z+4];
var b2 = hash[z+5] === undefined ?'0':hash[z+5];
var t1 = hash[z+6] === undefined ?'0':hash[z+6];
var t2 = hash[z+7] === undefined ?'0':hash[z+7];
if (t2 === undefined)
{
pixel = "#000";
}
else
{
pixel = `#${r1}${r2}${g1}${g2}${b1}${b2}`;
//pixel = `#${r1}${r2}${g1}${g2}${b1}${b2}${t1}${t2}`;
//pixel = `#${r1}${r1}${r1}${r1}${r1}${r1}${r1}${r1}`;
//pixel = `#${r1}${r1}${r1}${r1}${r1}${r1}`;
//pixel = `#${r1}${g1}${b1}`;
}
if ( 0 >= xi && 0 >= yi )
{
// //z=Math.abs(Math.floor((yi*xi)/4));
// //if ( z > 120 ) z = z-120;
// //pixel = `#${hash[z-113]}${hash[z-114]}${hash[z-115]}${hash[z-116]}${hash[z-117]}${hash[z-118]}${hash[z-119]}${hash[z-120]}`;
// pixel = `#${hash[z]}${hash[z+1]}${hash[z+2]}${hash[z+3]}${hash[z+4]}${hash[z+5]}${hash[z+6]}${hash[z+7]}`;
// //pixel = '#2a2'
}
else if ( 0 <= xi && 0 >= yi )
{
//pixel = `#${hash[z]}${hash[z+1]}${hash[z+2]}${hash[z+3]}${hash[z+4]}${hash[z+5]}`; //${hash[z+6]}${hash[z+7]}`;
// //z=Math.abs(Math.floor((yi*xi)/128));
// pixel = `#${hash[z]}${hash[z+1]}${hash[z+2]}${hash[z+3]}${hash[z+4]}${hash[z+5]}${hash[z+6]}${hash[z+7]}`;
// // pixel = '#000';
// //pixel = '#22a';
}
else if ( 0 >= xi && 0 <= yi )
{
//pixel = `#${hash[z]}${hash[z+1]}${hash[z+2]}${hash[z+3]}${hash[z+4]}${hash[z+5]}`; //${hash[z+6]}${hash[z+7]}`;
// z=Math.abs(Math.floor((yi*xi)/128));
// // pixel = '#000';
// pixel = '#a22';
}
else if ( 0 <= xi && 0 <= yi )
{
//pixel = `#${hash[z]}${hash[z+1]}${hash[z+2]}${hash[z+3]}${hash[z+4]}${hash[z+5]}`; //${hash[z+6]}${hash[z+7]}`;
// z=Math.abs(Math.floor((yi*xi)/128));
// pixel = '#000';
}
pixels[y][x] = pixel;
}
}
createImage( pixels, hash, what );
}
function createImage(pixels, hash, what)
{
//debugLog(pixels);
var canvas = document.createElement('canvas');
//canvas.width = pixels[0].length;
//canvas.height = pixels.length;
var output_x_y = 256;
canvas.width = output_x_y;
canvas.height = output_x_y;
var context = canvas.getContext('2d');
var zoom_factor = 6;
var zoom_size = Math.floor(output_x_y/zoom_factor);
var radius = Math.floor(output_x_y/zoom_size);
// debugLog(`Radius: ${radius}`);
for ( var y = 0; y < zoom_size; ++y )
{
for ( var x = 0; x < zoom_size; ++x )
{
var fy = (canvas.height-zoom_size)/2;
var fx = (canvas.width-zoom_size)/2;
var ax = Math.floor(x+fx+1);
var ay = Math.floor(y+fy+1);
//debugLog(`${ax} + ${ay}`);
var pixel_to_be_enhanced = pixels[ay][ax];
var c = 0;
var r = 0;
for (var i = 0; i < radius; ++i)
{
for (var k = 0; k < radius; ++k)
{
var subpixel = pixel_to_be_enhanced;
if ( i >= radius - Math.floor(radius/3) )
{
if ( k >= radius - Math.floor(radius/3) )
{
// debugLog(i);
c = (x*radius)+k;
r = (y*radius)+i;
context.fillStyle = subpixel;
context.fillRect(c, r, radius/3, radius/3);
context.stroke();
}
}
//debugLog(`${x} -> ${c}, ${y} -> ${r}`);
}
}
}
}
if ( what !== 'new' )
{
document.querySelector('.generated').src = canvas.toDataURL('image/png');
}
else
{
document.querySelector(`#i-${hash}`).src = canvas.toDataURL('image/png');
document.querySelector(`#i-${hash}`).width = 128;
}
}
// @license-end
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