Question

我为php中的图像创建代码并保存到png / jpeg。但问题是有时候文本太长而且没有覆盖整个区域。它将开箱即用，文本丢失。代码就像这样

<?php
$im = imagecreatetruecolor(400, 30);
    $white = imagecolorallocate($im, 255, 255, 255);
    $black = imagecolorallocate($im, 0, 0, 0);
    imagefilledrectangle($im, 0, 0, 399, 29, $white);
    $text = 'Testing...';
    $font = 'arial.ttf';
    imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
    imagejpeg($im,'name.jpg');
    imagedestroy($im);
    ?>

当我添加长文本时，这个代码可以正常工作。它还有其他解决办法将文本自动调整到框中吗？

Answer 1

好的，我做了一个小功能（尚未测试）

function getTextFactor($font, $text, $size, $angle, $width, $height)
{
    //if the size are zero don't execute any further, it's not necessary
    if($width == 0 || $height == 0) throw new ArgumentException("$width or $height could not be zero!");

    //get the text size
    $box = imagettfbbox($size, $angle, $font, $text);

    $minX = min(array($box[0],$box[2],$box[4],$box[6]));
    $maxX = max(array($box[0],$box[2],$box[4],$box[6]));

    $minY = min(array($box[1],$box[3],$box[5],$box[7]));
    $maxY = max(array($box[1],$box[3],$box[5],$box[7]));

    $factorX = 1;
    if($tmpWdith = ($maxX - $minX) > $width)
    {
        $factorX = $tmpWidth / $width;
    }

    $factorY = 1;
    if($tmpHeight = ($maxY - $minY) > $height)
    {
        $factorY = $tmpHeight / $height;
    }

    return min(array($factorX, $factorY));
}

您将获得调整图像中字体大小的因素。

您可以在脚本中使用以下内容：

$width = 400;
$height = 30;
$textSize = 20;
$textAngle = 0;
$text = 'Testing...';
$font = 'arial.ttf';

$im = imagecreatetruecolor($width, $height);
$white = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, $width-1, $height-1, $white); //why exactly do you subtract 1?

$factor = getTextFactor($font, $text, $textSize, $textAngle, $width, $height);
imagettftext($im, $textSize*$factor, $textAngle, 10, 20, $black, $font, $text);

imagejpeg($im, 'name.jpg');
imagedestroy($im);

请注意，目前上述因素功能并未使用文本的填充或边距。

如果您想要宽度，请使用以下函数：

function getTextBox($font, $text, $size, $angle)
{
    $box = imagettfbbox($size, $angle, $font, $text);

    $minX = min(array($box[0],$box[2],$box[4],$box[6]));
    $maxX = max(array($box[0],$box[2],$box[4],$box[6]));

    $minY = min(array($box[1],$box[3],$box[5],$box[7]));
    $maxY = max(array($box[1],$box[3],$box[5],$box[7]));

    return array("width" => abs($maxX - $minX), "height" => abs($maxY - $minY));
}

然后用你得到的尺寸创建图像。

Php Text to image Autofit？

1 个答案: