Question

在我用于缩略图的主题中，我希望它们使用Ottos function.php脚本完成黑白。但是，当使用插件为较大的颜色图像添加水印时，黑白拇指会变回颜色。单击黑白时，漂亮照片中的彩色照片会加载。

所以我想我必须在function.php中添加水印，但是没有解释如何执行此操作。

所以使用水印脚本和黑白脚本我试图将两者合并......你猜对了它会阻止网站加载，这并不奇怪。

所以我的问题是，是否有人这样做过？它真的有用吗？

由于

以下是我到目前为止所尝试的内容......

add_action('after_setup_theme','themename_watermark');
function themename_watermark() {
    add_image_size('watermark-test-image', 500, 650, true);
}




add_filter('wp_generate_attachment_metadata','themename_watermark');
function themename_watermark($meta) {
    $file = wp_upload_dir();
    $file = trailingslashit($file['path']).$meta['sizes']['watermark-test-image']['file'];
    list($orig_w, $orig_h, $orig_type) = @getimagesize($file);
    $img = wp_load_image($file);




//watermark position
$p = $_GET['p']; if(!$p) $p = 'br';
/*
p can be anything from the following list:
tl = top left
tc = top center
tr = top right
cl = center left
c = center of the image
cr = center right
bl = bottom left
bc = bottom center
br = bottom right
*/
//watermarked image quality
$q = $_GET['q'];
//if the quality field is missing or is not on the 0 to 100 scale then we set the quality to 93
if(!$q || $q<0 || $q>100) $q = '93';


$filetype = substr($img,strlen($img)-4,4);
$filetype = strtolower($filetype);
if($filetype == ".gif") $image = @imagecreatefromgif($img);
if($filetype == ".jpg") $image = @imagecreatefromjpeg($img);
if($filetype == ".png") $image = @imagecreatefrompng($img);
if (!$image) die();

//getting the image size for the original image
$img_w = imagesx($image);
$img_h = imagesy($image);
//if the filename has 150x150 in it's name then we don't apply the watermark
if (eregi("155x194", $img)) {
    imagejpeg($image, null, $q); die();
} else {
    $watermark = @imagecreatefrompng('watermark.php');
}
/*
//if you want to use the watermark only on bigger images then use this instead of the condition above
if ($img_w < "150") {//if image width is less then 150 pixels
    imagejpeg($image, null, $q); die();
} else {
    $watermark = @imagecreatefrompng('watermark.png');
}
*/

//getting the image size for the watermark
$w_w = imagesx($watermark);
$w_h = imagesy($watermark);

if($p == "tl") {
    $dest_x = 0;
    $dest_y = 0;
} elseif ($p == "tc") {
    $dest_x = ($img_w - $w_w)/2;
    $dest_y = 0;
} elseif ($p == "tr") {
    $dest_x = $img_w - $w_w;
    $dest_y = 0;
} elseif ($p == "cl") {
    $dest_x = 0;
    $dest_y = ($img_h - $w_h)/2;
} elseif ($p == "c") {
    $dest_x = ($img_w - $w_w)/2;
    $dest_y = ($img_h - $w_h)/2;
} elseif ($p == "cr") {
    $dest_x = $img_w - $w_w;
    $dest_y = ($img_h - $w_h)/2;
} elseif ($p == "bl") {
    $dest_x = 0;
    $dest_y = $img_h - $w_h;
} elseif ($p == "bc") {
    $dest_x = ($img_w - $w_w)/2;
    $dest_y = $img_h - $w_h;
} elseif ($p == "br") {
    $dest_x = $img_w - $w_w;
    $dest_y = $img_h - $w_h;
}

imagecopy($image, $watermark, $dest_x, $dest_y, 0, 0, $w_w, $w_h);
imagejpeg($image, null, $q);
imagedestroy($image);
imagedestroy($watermark);

if ( function_exists( 'add_theme_support' ) ) { 
add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 500, 650 ); // default Post Thumbnail dimensions (cropped)


}

Answer 1

在处理全尺寸上传图片时，以下内容适用于我。只需在$ meta数组中更改要处理的文件即可。我的水印文件位于我的uploads文件夹的根目录中。

    function water_mark($meta, $id){

    if(!isset($meta['sizes'])) {
        return $meta;
    }   

    $upload_path = wp_upload_dir();     
    $path = $upload_path['basedir'];

    //handle the different media upload directory structures
    if(isset($path)){       
        $file = trailingslashit($upload_path['basedir'].'/').$meta['file'];
        $water_path = trailingslashit($upload_path['basedir'].'/').'watermark.png';
    }else{
        $file = trailingslashit($upload_path['path']).$meta['file'];
        $water_path = trailingslashit($upload_path['path']).'watermark.png';
    }

    //list original image dimensions
    list($orig_w, $orig_h, $orig_type) = @getimagesize($file);

    //load watermark - list its dimensions
    $watermark = imagecreatefrompng($water_path);
    list($wm_width, $wm_height, $wm_type) = @getimagesize($water_path); 
    //if your watermark is a transparent png uncomment below
    //imagealphablending($watermark, 1);

    //load fullsize image
    $image = wp_load_image($file);
    //if your watermark is a transparent png uncomment below
    //imagealphablending($image, 1);

    //greyscale image
    imagefilter($image, IMG_FILTER_GRAYSCALE);

    //create merged copy
    //if your watermark is a transparent png uncomment below
    //imagecopy($image, $watermark, $orig_w - ($wm_width + 10), $orig_h - ($wm_height + 10), 0, 0, $wm_width, $wm_height);

    //if your watermark is a transparent png comment out below
    imagecopymerge($image, $watermark, $orig_w - ($wm_width + 10), $orig_h - ($wm_height + 10), 0, 0, $wm_width, $wm_height, 70);

    //save image backout
    switch ($orig_type) {
        case IMAGETYPE_GIF:
            imagegif($image, $file );
            break;
        case IMAGETYPE_PNG:
            imagepng($image, $file, 10 );
            break;
        case IMAGETYPE_JPEG:
            imagejpeg($image, $file, 95);
            break;
    }

    imagedestroy($watermark);
    imagedestroy($image);

    //return metadata info
    wp_update_attachment_metadata($id, $meta);
    return $meta;
}


add_filter('wp_generate_attachment_metadata','water_mark', 10, 2);

将水印添加到Wordpress function.php

1 个答案: