问在位图中可视化ASCII文本

EN

<?php

if(isset($_POST['text'])){
    //in my case known size of text is 204*204, add your own size here:
    asciiToPng(204,204,$_POST['text']);
}else{
    $out  = "<form name ='textform' action='' method='post'>";
    $out .= "<textarea type='textarea' cols='100' rows='100' name='text' value='' placeholder='Asciitext here'></textarea><br/>";
    $out .= "<input type='submit' name='submit' value='create image'>";
    $out .= "</form>";
    echo $out;
}

function asciiToPng($image_width, $image_height, $text)
{
    // first: lets type cast;
    $image_width = (integer)$image_width;
    $image_height = (integer)$image_height;
    $text = (string)$text;
    // create a image
    $image  = imagecreatetruecolor($image_width, $image_height);

    $black = imagecolorallocate($image, 0, 0, 0);
    $x = 0;
    $y = 0;
    for ($i = 0; $i < strlen($text)-1; $i++) {
        //assign some more or less random colors, math functions are just to make a visible difference e.g. between "a" and "b"
        $r = pow(ord($text{$i}),4) % 255;
        $g = pow(ord($text{$i}),3) % 255;
        $b = ord($text{$i})*2 % 255;
        $color = ImageColorAllocate($image, $r, $g, $b);
        //assign random color or predefined color to special chars ans draw pixel
        if($text{$i}!='#'){
            imagesetpixel($image, $x, $y, $color);
        }else{
            imagesetpixel($image, $x, $y, $black);
        }
        $x++;
        if($text{$i}=="\n"){
            $x = 0;
            $y++;
        }
    }
    // show image, free memory
    header('Content-type: image/png');
    ImagePNG($image);
    imagedestroy($image);
}
?>

toPixel[c_String] := toPixel[c] = Mean[Flatten[ImageData[Rasterize[
 Style[c, 30, FontFamily -> "Courier"], "Image", ColorSpace -> "Grayscale"]]]]

data = toPixel /@ Characters[#] & /@ StringSplit[text, "\n"];
Image@(PadRight[#, 40, 1] & /@ data) // ImageAdjust

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