创建动态PNG图像 [英] Create a dynamic PNG image

问题描述

我想在PHP中创建一个小函数，它接受颜色，形状，透明度等参数并输出PNG图像。我听说过PHP GD库，但我想知道如何创建像 soon.media.mit.edu

I want to create a small function in PHP which takes in arguments like color, shape, transparency etc. and outputs a PNG image. I heard about PHP GD library but I want to know how can one create something as creative as soon.media.mit.edu

推荐答案

这是一个很好的例子，你可以用这些功能。虽然可能，创建一个像你描述的那样的图像会非常困难，但我做了一些奇怪的东西，包括渐变，循环和颜色。

This is a good example, you can do virtually everything using these functions. While possible, creating an image like the one you described would be pretty hard by I have done some weird stuff with gradients, loops and colors though.

如果你想制作根据一些参数动态生成图像，您可以随时在photoshop中创建图像，然后根据用户选择的内容叠加它们。

If you wanted to make an image like that dynamically based on some parameters you can always create the images beforehand in photoshop and then overlay them based on what a user selects.

有很多乐趣你可以拥有。

There is a lot of fun you can have.

编辑：哦顺便说一下，如果你有兴趣给出一个无效参数，显示一些负责创建图像并导致错误的python代码。这是一个了解代码的好地方。

Oh by the way, if your interested giving an invalid parameter shows some of the python code that is responsible for creating the image and causing the error. It would be a good place to get some idea of the code.

第二编辑：这只是我用这种技术所做的事情。请记住它已经有一段时间了。它接受一个基于查询字符串的名称，并基本上做了一些带有大量随机数的循环。

2nd This is just something I have done with this sort of technology. Bear in mind it was quite a while ago. It accepts a name based on the query string and basically does a few loops with a lot of random numbers.

这是源代码，我为任何愚蠢的代码道歉/引号。这是在很久以前写的，当我大约14岁时，我相信（可能有很多瑕疵）。

Here is the source code, I apologize for any stupid code/quotes. This was written quite a while ago, when I was about 14 I believe (probably many flaws).

<?php
header("Content-type:image/jpeg");
$array=array("I am a monument to all your sins", "Currently making pizza","Best before 12/7/09", "Farming Onions");
        function imagettftext_cr(&$im, $size, $angle, $x, $y, $color, $fontfile, $text)
        {
            // retrieve boundingbox
            $bbox = imagettfbbox($size, $angle, $fontfile, $text);
            // calculate deviation
            $dx = ($bbox[2]-$bbox[0])/2.0 - ($bbox[2]-$bbox[4])/2.0;         // deviation left-right
            $dy = ($bbox[3]-$bbox[1])/2.0 + ($bbox[7]-$bbox[1])/2.0;        // deviation top-bottom
            // new pivotpoint
            $px = $x-$dx;
            $py = $y-$dy;
            return imagettftext($im, $size, $angle, $px, $y, $color, $fontfile, $text);
        }
$image = imagecreate(500,90);
$black = imagecolorallocate($image,0,0,0);
$grey_shade = imagecolorallocate($image,40,40,40);
$white = imagecolorallocate($image,255,255,255);


$text = $array[rand(0,sizeof($array)-1)];

// Local font files, relative to script
$otherFont = 'army1.ttf';
$font = 'army.ttf';

if($_GET['name'] == ""){ $name = "Sam152";}else{$name= $_GET['name'];}
$name = substr($name, 0, 25);    


//BG text for Name
while($i<10){
imagettftext_cr($image,rand(2,40),rand(0,50),rand(10,500),rand(0,200),$grey_shade,$font,$name);
$i++;
}
//BG text for saying
while($i<10){
imagettftext_cr($image,rand(0,40),rand(90,180),rand(100,500),rand(200,500),$grey_shade,$otherFont,$text);
$i++;
}

// Main Text
imagettftext_cr($image,35,0,250,46,$white,$font,$name);
imagettftext_cr($image,10,0,250,76,$white,$otherFont,$text);
imagejpeg($image);

?>

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