PHP imagegrabwindow GD 库仅返回黑色图像

发布于 2024-08-07 19:12:18 字数 1471 浏览 3 评论 0原文

我希望有人可以帮助我和其他许多人解决这个问题...

我想使用 php 的 imagegrabwindow 函数部分和 GD 库创建一个网站的屏幕截图

在花了一整天的时间实现代码后，我终于可以捕获图像并将其保存到文件中，但是图像是黑色的，而不是我期望的图像...

经过进一步调查，我了解到图像是黑色的原因之一是因为 apache 没有打开与桌面交互 - 因此会创建黑色图像 - 问题是我没有将 Apache 作为服务器运行，我正在运行 IIS 6...

服务中是否有一个设置允许我与桌面交互？如果有人可以指出我正确的方向吗？

<?php
    $browser = new COM("InternetExplorer.Application");
    $handle = $browser->HWND;
    $browser->Visible = true;
    $browser->Fullscreen = true;
    $browser->Navigate("http://localhost/site/advertise/index.asp");

    /* Still working? */
    while ($browser->Busy) {
        com_message_pump(4000);
    }
    $im = imagegrabwindow($handle, 0);
    imagepng($im, "iesnap6.jpg");
    $browser->Quit();
    ?>

感谢下面的答案，我已将 imagepng 更改为 imagejpeg - 但仍然得到黑色图像...

imagejpeg($im, "iesnap7.jpg");

任何帮助将不胜感激！

谢谢，

我已将代码修改为：社交成瘾者仍然没有成功，图像以黑色显示！

  <?php
 header('Content-type: image/jpeg');
$browser = new COM("InternetExplorer.Application");
$handle = $browser->HWND;
$browser->Visible = true;
$browser->Navigate("http://localhost/advertise/index.asp");

/* Still working? */
while ($browser->Busy) {
    com_message_pump(4000);
}
$im = imagegrabwindow($handle, 0);
$browser->Quit();
imagejpeg($im," file2.jpg");
imagedestroy($im);
?>

Social Addict - 我已经添加了标题 - 我还不断更改 file1.jpg 名称以确保它没有使用黑色缓存图像...仍然不走运！

原文

I am hoping that there is someone that can help me and many others with this problem...

I want to create a screenshot of a website using the imagegrabwindow function part of php and the GD library

After spending the whole day implementing the code I finally can capture the image and save it to a file, but the image is black and not the image that I expected...

On further investigation I have learned that one of the reasons why the image is black is because apache is not turned on to interact with the desktop - and because of this creates a black image - The issue is I am not running Apache as a server I am running IIS 6...

Is there a setting in Services that I should allow to interact with the desktop? and if there is can somebody point me in the right direction?

<?php
    $browser = new COM("InternetExplorer.Application");
    $handle = $browser->HWND;
    $browser->Visible = true;
    $browser->Fullscreen = true;
    $browser->Navigate("http://localhost/site/advertise/index.asp");

    /* Still working? */
    while ($browser->Busy) {
        com_message_pump(4000);
    }
    $im = imagegrabwindow($handle, 0);
    imagepng($im, "iesnap6.jpg");
    $browser->Quit();
    ?>

Thanks to the answers below I have changed imagepng to imagejpeg - But still get a black image...

imagejpeg($im, "iesnap7.jpg");

Any help would be much appreciated!

Thanks

I have ammended the code to this: Social Addict still no success with the image showing up in Black!

  <?php
 header('Content-type: image/jpeg');
$browser = new COM("InternetExplorer.Application");
$handle = $browser->HWND;
$browser->Visible = true;
$browser->Navigate("http://localhost/advertise/index.asp");

/* Still working? */
while ($browser->Busy) {
    com_message_pump(4000);
}
$im = imagegrabwindow($handle, 0);
$browser->Quit();
imagejpeg($im," file2.jpg");
imagedestroy($im);
?>

Social Addict - I have added the header - I am also constantly changing the file1.jpg name to make sure it is not using a black cached images... still no luck!

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半衾梦 2024-08-14 19:12:18

我以前遇到过这个问题，通常是当您尝试加载或将图像转换为不正确的类型时引起的，

我认为这可能与此行有关，

imagepng($im, "iesnap6.jpg");

您将其另存为 png 并将其命名为 jpg 。

正如您所说，尝试以下操作 jpeg

imagejpeg($im, "iesnap6.jpg");

尝试

设置在 imagejpeg 调用之前输入标头：

header('Content-type: image/jpeg');

然后直接从浏览器访问脚本并查看是否有效？

这也是 PHP.NET 的另一个已知问题

这个函数在以下情况下非常慢：
我正在我的机器上测试它。它
大约需要 2 或 3 秒的时间
返回图像。它也无法工作
如果 Apache 服务没有
访问“与桌面交互”

I've had this problem before and is often caused when you try and load or convert an image to an incorrect type

I think it may be something to do with this line

imagepng($im, "iesnap6.jpg");

You are saving it as a png and naming it as a jpg here.

Try the following as you have stated you want jpeg

imagejpeg($im, "iesnap6.jpg");

instead

Try setting the header type before the imagejpeg call:

header('Content-type: image/jpeg');

then accessing the script from the browser directly and see if that works?

Also this is another known issue from PHP.NET

This function was painfully slow when
I was testing it on my machine. It
took about 2 or 3 seconds for it to
return an image. It also fails to work
if the Apache service doesn't have
access to "Interact with the desktop"

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