1. Список говнокодов пользователя HIV

    Всего: 1

  2. JavaScript / Говнокод #26702

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    <!DOCTYPE html>
<head>
    <meta charset="utf-8"/>
</head>
<body>
<canvas id='pixel_canvas'></canvas>
<pre id='text_canvas'></pre>
<script>
    'use strict';
    function tryFetch() {
        const array = arguments[0];
        const onError = arguments[arguments.length - 1];
        let result = array;
        for (let i = 1; i < arguments.length - 1; ++i) {
            if (arguments[i] < result.length) {
                result = result[arguments[i]];
            } else {
                return onError;
            }
        }
        return result;
    }

    function bitmap2tetramap(bitmap) {
        let tetramap = []
        for (let i = 0; i < bitmap.length; i += 2) {
            tetramap.push([]);
            for (let j = 0; j < bitmap[i].length; j += 2) {
                tetramap[tetramap.length - 1].push(
                    tryFetch(bitmap, i, j, 0) << 3 |
                    tryFetch(bitmap, i, j + 1, 0) << 2 |
                    tryFetch(bitmap, i + 1, j, 0) << 1 |
                    tryFetch(bitmap, i + 1, j + 1, 0)
                );
            }
        }
        return tetramap;
    }

    function renderTetramap(tetramap) {
        const tiles = [
            ' ', '▗', '▖', '▄',

            '▝', '▐', '▞', '▟',

            '▘', '▚', '▌', '▙',

            '▀', '▜', '▛', '█'
        ];
        return tetramap.map(row => row.map(i => tiles[i]).join('')).join('<br>');
    }

    function renderBitmap(bitmap) {
        return renderTetramap(bitmap2tetramap(bitmap));
    }

    function rgba2bitmap(rgba, width, height) {
        let bitmap = [];
        for (let i = 0; i < height; ++i) {
            bitmap.push([]);
            for (let j = 0; j < width; ++j) {
                const currentRGBAElementIndex = (i * width * 4) + j * 4;
                const red = rgba[currentRGBAElementIndex];
                const green = rgba[currentRGBAElementIndex + 1];
                const blue = rgba[currentRGBAElementIndex + 2];
                const a = rgba[currentRGBAElementIndex + 3];
                bitmap[i].push((red + green + blue + a) / 4 > 0? 1 : 0);
            }
        }
        return bitmap;
    }

    function renderImageData(imageData) {
        return renderBitmap(rgba2bitmap(imageData.data, imageData.width, imageData.height));
    }

    const ctx = pixel_canvas.getContext("2d");
    ctx.font = "16px serif";
    ctx.fillText("Какой багор )))", 0, 16);

    text_canvas.innerHTML = renderImageData(ctx.getImageData(0, 0, pixel_canvas.width, pixel_canvas.height));
</script>
</body>

    HIV, 28 Мая 2020

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