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HomeBackend DevelopmentPHP TutorialGD 函数合成图片问题(一张jpg,一张png)

RT:
请问用php怎么能合成两张图片呢?
一张是png 透明的底图,另一张是jpg 图片

现在想让jpg的图片合成到png的底图上面,成为一张新的图片,如何实现呢?

另外问下,是不是合成的图片要尺寸一样大呢?还是底图可以大点的?

本人在网上也找了一些方法,但好像都不行

  $path_1 = "topic_assets/522592b5d61cb_ip4.jpg";  $path_2 = "topic_assets/topic_border_android.png";	//echo $path_1;	$image=imagecreatefromjpeg($path_1);  	$wm=imagecreatefrompng($path_2);   	$im=imagecreatetruecolor(imagesx($image),imagesy($image));   	imagecopy($im,$image,0,0,0,0,imagesx($image),imagesy($image));   	imagecopy($im,$wm,0,0,0,0,imagesx($wm),imagesy($wm));


做过类似的,给个解决方案吧...


回复讨论(解决方案)

GD 提供了很多函数,你总得都去试试吧!比如这个怎么样?

$t1 = 'http://avatar.csdn.net/1/C/9/1_mahuatengbc.jpg';$t2 = 'http://avatar.csdn.net/2/5/B/1_yykr1987.jpg';$im1 = imagecreatefromjpeg($t1);$im2 = imagecreatefromjpeg($t2);imagecopymerge($im1, $im2, 35, 5, 0, 0, imagesx($im2), imagesy($im2), 63);imagejpeg($im1);

GD 提供了很多函数,你总得都去试试吧!比如这个怎么样?

$t1 = 'http://avatar.csdn.net/1/C/9/1_mahuatengbc.jpg';$t2 = 'http://avatar.csdn.net/2/5/B/1_yykr1987.jpg';$im1 = imagecreatefromjpeg($t1);$im2 = imagecreatefromjpeg($t2);imagecopymerge($im1, $im2, 35, 5, 0, 0, imagesx($im2), imagesy($im2), 63);imagejpeg($im1);

谢谢版主了,我先试试看!

艾玛,吓死我了!
我的要求是一张jpg ,一张png ,png做底图, 合成的也是png格式的!

按照版主的做法,出现了一大堆奇怪的乱码 ,如下图



我的代码是这样的:

$path_1 = "522592b5d61cb_ip4.jpg";	$path_2 = "topic_border_android.png";	$im1 = imagecreatefromjpeg($path_1);	$im2 = imagecreatefrompng($path_2);	imagecopymerge($im1, $im2, 35, 5, 0, 0, imagesx($im2), imagesy($im2), 63);	imagejpeg($im2);	imagedestroy($im2);

不知道哪里的问题....

艾玛,吓死我了!
我的要求是一张jpg ,一张png ,png做底图, 合成的也是png格式的!

按照版主的做法,出现了一大堆奇怪的乱码 ,如下图



我的代码是这样的:

$path_1 = "522592b5d61cb_ip4.jpg";	$path_2 = "topic_border_android.png";	$im1 = imagecreatefromjpeg($path_1);	$im2 = imagecreatefrompng($path_2);	imagecopymerge($im1, $im2, 35, 5, 0, 0, imagesx($im2), imagesy($im2), 63);	imagejpeg($im2);	imagedestroy($im2);

不知道哪里的问题....

imagejpeg生成的是jpg格式的图片。imgpng生成的才是png格式的图片。

你的之所以出现”怪“代码,是因为没有加上header,所以被当做二进制数据直接输出了。
前面加上header("content-type:image/png");
然后用imgpng生成图片。

也不一定
也可能是 BOM 头的关系

谢谢楼上的,但是图片没保存下来?
我只是在浏览器看到这个图片了,但是我想在文件夹中找到这个图片,就没有,是合成的图片,不能保存吗?

而且这图片的后面有黑色的阴影,这个能去掉么!

imagejpeg($im2, '图片文件名');

    header("content-type:image/png");    //合成两张图片    $targetFileDark="522ec9db6b46b"; 	$dest = imagecreatefrompng('topic_border_android.png');	$src = imagecreatefromjpeg($targetFileDark."_ip4.jpg");		$newim = imagecreatetruecolor(103,92);	$back = imagecolorallocatealpha($newim, 0, 0, 0, 127);	imagefilledrectangle($src, 0, 0, 98, 58, $back);			imagealphablending($dest, false);	imagesavealpha($dest, true);	imagecopymerge($dest, $src, 36,11,0,0,imagesx($src), imagesy($src),100);	imagepng($dest,$targetFileDark."_android.png");	imagedestroy($dest);	imagedestroy($src);

昨天研究了一下午,终于搞定了

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