我有以下 image_helper
function resize($img_path_name, $new_path_name = NULL, $new_width = NULL, $new_height = NULL){
$CI =& get_instance();
$config['image_library'] = 'GD2';
$config['source_image'] = $img_path_name;
$config['new_image'] = $new_path_name;
$config['dynamic_output'] = FALSE;
$config['quality'] = '90%';
$config['create_thumb'] = FALSE;
# if either new_width or new_height is null simply maintain ratio
if( is_null( $new_width ) || is_null( $new_width ) ){
$config['maintain_ratio'] = TRUE;
}else{
$config['maintain_ratio'] = FALSE;
}
$config['width'] = $new_width;
$config['height'] = $new_height;
$config['master_dim'] = 'auto'; # auto, width, height
foreach( $config as $fld=>$val ){
log_message('error', 'resize config: ' . $fld . ':' . $val);
}
if( class_exists( 'image_lib' ) ){
$CI->image_lib->initialize($config);
}else{
$CI->load->library('image_lib', $config);
}
# Clear the config
foreach( $config as $fld=>$val ){
$config[$fld] = '';
}
# returns 1 or 0
$result = $CI->image_lib->resize();
$CI->image_lib->clear();
if( $result ){
return $result;
}else{
log_message('error', $CI->image_lib->display_errors() );
}
}
function wm_img($img_path_name, $new_path_name = NULL, $wm_text = NULL){
$CI =& get_instance();
if( ! file_exists( $img_path_name ) ){
log_message('error', 'Original file not found. ' . $img_path_name);
return 0;
}else{
#log_message('error', 'Original file found. ' . $img_path_name);
list($width, $height, $type, $attr) = getimagesize($img_path_name);
$arr_img = explode( '/', $img_path_name );
$img_name = $arr_img[(sizeof( $arr_img ) - 1)];
#log_message('error', 'img_name: ' . $img_name);
if( ! is_null( $new_path_name ) ){
# $new_path_name may only be a path or only a file name or both
if( strpos( $new_path_name, '/' ) === FALSE ){
# no slashes => file name only
# new watermarked img will be created in the same location but with new name
$path = explode( '/', $new_img_name );
foreach( $path as $itm ){
$wm_img .= $itm;
}
$wm_img .= $img_name;
}elseif( strrpos( $new_path_name, '/', -0 ) ){
# ending in / => a path
# new watermarked img will be created in this path with orginial name
$wm_img = $new_path_name . $img_name;
}else{
# must be full path and filename
# new watermarked img will be created in new path with new name
$wm_img = $new_path_name;
}
# path and name of img to be created
$wm_img = $new_path_name . $img_name;
}else{
$wm_img = $new_path_name . $img_name;
}
if( is_null( $wm_text ) || empty( $wm_text ) ){
# Overlay Prefernces
# Relative or Absolute path
# Transparent PNG or GIF
## Need to resize the Overlay to match the image
$new_overlay = 'images/wm/overlay_' . $width . 'x' . $height . '.png';
if( ! file_exists( $new_overlay ) ){
try{
# use images_helper->resize because it sets up the config
$resize_result = resize(WM_OVERLAY, $new_overlay, $width, $height);
}catch ( Exception $e ){
log_message('error', $e->getMessage());
}
}
$config['wm_type'] = 'overlay';
if( file_exists( $new_overlay ) ){
$config['wm_overlay_path'] = $new_overlay;
$config['wm_vrt_alignment'] = 'top'; # top,middle,bottom
$config['wm_hor_alignment'] = 'left'; # left,center,right
$config['wm_vrt_offset'] = 0; # num pixels from the alignment side
$config['wm_hor_offset'] = 0; # num pixels from the alignment side
}else{
$config['wm_overlay_path'] = WM_OVERLAY;
$config['wm_vrt_alignment'] = 'bottom'; # top,middle,bottom
$config['wm_hor_alignment'] = 'center'; # left,center,right
$config['wm_vrt_offset'] = $height/4; # num pixels from the alignment side
$config['wm_hor_offset'] = ''; # num pixels from the alignment side
}
$config['wm_opacity'] = 50; # 1 not transparent - 100 fully transparent
# coordinates of the pixel color on the overlay to make transparent
$config['wm_x_transp'] = 4;
$config['wm_y_transp'] = 4;
}else{
$config['wm_type'] = 'text';
# Text Preferences
$config['wm_text'] = $wm_text;
$config['wm_font_path'] = './system/fonts/texb.ttf';
$config['wm_font_size'] = '24';
$config['wm_font_color'] = '000000'; # black
$config['wm_shadow_color'] = 'ffffff'; # white
$config['wm_shadow_distance'] = '5';
$config['wm_vrt_alignment'] = 'bottom'; # top,middle,bottom
$config['wm_hor_alignment'] = 'center'; # left,center,right
$config['wm_vrt_offset'] = $height/4; # num pixels from the alignment side
$config['wm_hor_offset'] = ''; # num pixels from the alignment side
}
# because resize clears $config, these have to be after it
# Both Types
# Relative or absolute path to file
$config['image_library'] = 'GD2';
$config['new_image'] = $new_path_name;
$config['source_image'] = $img_path_name;
$config['dynamic_output'] = FALSE;
$config['quality'] = '90%';
# positioning
$config['padding'] = 0; # a number in pixels
foreach( $config as $fld=>$val ){
log_message('error', 'wm config: ' . $fld . ':' . $val);
}
if( class_exists( 'image_lib' ) ){
$CI->image_lib->initialize($config);
}else{
$CI->load->library('image_lib', $config);
}
# Clear the config
foreach( $config as $fld=>$val ){
$config[$fld] = '';
}
# returns 1 or 0
$result = $CI->image_lib->watermark();
if( $result ){
# watermarking worked
if( file_exists( $wm_img ) ){
log_message('error', 'Watermark ' . $result . '. New File found: ' . $wm_img);
return 1;
}else{
log_message('error', 'Watermark ' . $result . '. New File not found: ' . $wm_img);
return 1;
}
}else{
log_message('error', 'Watermark Failed ' . $result );
log_message('error', $CI->image_lib->display_errors() );
return 0;
}
}
}
正如您在第二个函数中看到的那样，我调用第一个函数来调整叠加层的大小，然后再将其应用于图像。
一，调整后的叠加层的属性仍然说它是原始大小。我不认为这是真的，因为文件大小发生了变化。为什么？调整大小不会改变显示的属性吗？
其次，当调用resize时，加水印失败，没有水印图像被创建。日志显示“您的服务器不支持处理此类图像所需的 GD 功能。”。刷新页面时（不调用调整大小，因为调整大小覆盖文件存在）水印图像被创建。
如您所见，我正在清除配置以确保在实现函数时仅加载所需的配置，并使用 clear() 函数重置库。
如您所见，我正在初始化与重新加载此问题中的库。CodeIgniter/PHP/GD2 Image Manipulation 正在兴起
我正在使用 Codeigniter 2 image_lib 库。
在此先感谢您提供任何和所有想法/故障排除途径。我没有想法去测试。