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在文本上添加阴影

发布于 2024-12-18 02:07:20 字数 101 浏览 3 评论 0原文

我正在寻找使用 PHP 为图像上的文本添加阴影。

我知道如何向图像添加文本以及某些库如何允许您添加块阴影，但我看不到任何允许您添加褪色阴影的库。

这可能吗？

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一向肩并 2024-12-25 02:07:20

你想要的是 Imagick::shadowImage ( float $opacity , float $sigma , int $x , int $y )

这是一个例子，我在一些文本上放置阴影，然后将其叠加在背景图像上......

$background_layer = new Imagick('poster_pic_01.jpg'); # background image

$text_layer = new Imagick('transparent400.png'); # empty transparent png of the same size
$text_layer->annotateImage( $ImagickDraw, $pad_left, $pad_top, 0, "Your text here" );

/* create drop shadow on it's own layer */
$shadow_layer = $text_layer->clone(); 
$shadow_layer->setImageBackgroundColor( new ImagickPixel( 'black' ) ); 
$shadow_layer->shadowImage( 75, 5, 5, 5 ); 

/* composite original text_layer onto shadow_layer */
$shadow_layer->compositeImage( $text_layer, Imagick::COMPOSITE_OVER, 0, 0 ); 

/* composite shadow_layer (which now has text AND the shadow) onto image_layer */
$background_layer->compositeImage( $shadow_layer, Imagick::COMPOSITE_OVER, 0, 0 );

希望这个有帮助，

罗杰

What you want is Imagick::shadowImage ( float $opacity , float $sigma , int $x , int $y )

Here's an example where I put a drop shadow on some text and then superimpose that on a background image...

$background_layer = new Imagick('poster_pic_01.jpg'); # background image

$text_layer = new Imagick('transparent400.png'); # empty transparent png of the same size
$text_layer->annotateImage( $ImagickDraw, $pad_left, $pad_top, 0, "Your text here" );

/* create drop shadow on it's own layer */
$shadow_layer = $text_layer->clone(); 
$shadow_layer->setImageBackgroundColor( new ImagickPixel( 'black' ) ); 
$shadow_layer->shadowImage( 75, 5, 5, 5 ); 

/* composite original text_layer onto shadow_layer */
$shadow_layer->compositeImage( $text_layer, Imagick::COMPOSITE_OVER, 0, 0 ); 

/* composite shadow_layer (which now has text AND the shadow) onto image_layer */
$background_layer->compositeImage( $shadow_layer, Imagick::COMPOSITE_OVER, 0, 0 );

Hope this helps,

Roger

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