diff options
Diffstat (limited to 'wp-admin/includes/image.php')
| -rw-r--r-- | wp-admin/includes/image.php | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/wp-admin/includes/image.php b/wp-admin/includes/image.php new file mode 100644 index 0000000..ec4466e --- /dev/null +++ b/wp-admin/includes/image.php @@ -0,0 +1,192 @@ +<?php + +function get_udims( $width, $height) { + if ( $height <= 96 && $width <= 128 ) + return array( $width, $height); + elseif ( $width / $height > 4 / 3 ) + return array( 128, (int) ($height / $width * 128 )); + else + return array( (int) ($width / $height * 96 ), 96 ); +} + +function wp_create_thumbnail( $file, $max_side, $effect = '' ) { + + // 1 = GIF, 2 = JPEG, 3 = PNG + + if ( file_exists( $file ) ) { + $type = getimagesize( $file ); + + // if the associated function doesn't exist - then it's not + // handle. duh. i hope. + + if (!function_exists( 'imagegif' ) && $type[2] == 1 ) { + $error = __( 'Filetype not supported. Thumbnail not created.' ); + } + elseif (!function_exists( 'imagejpeg' ) && $type[2] == 2 ) { + $error = __( 'Filetype not supported. Thumbnail not created.' ); + } + elseif (!function_exists( 'imagepng' ) && $type[2] == 3 ) { + $error = __( 'Filetype not supported. Thumbnail not created.' ); + } else { + + // create the initial copy from the original file + if ( $type[2] == 1 ) { + $image = imagecreatefromgif( $file ); + } + elseif ( $type[2] == 2 ) { + $image = imagecreatefromjpeg( $file ); + } + elseif ( $type[2] == 3 ) { + $image = imagecreatefrompng( $file ); + } + + if ( function_exists( 'imageantialias' )) + imageantialias( $image, TRUE ); + + $image_attr = getimagesize( $file ); + + // figure out the longest side + + if ( $image_attr[0] > $image_attr[1] ) { + $image_width = $image_attr[0]; + $image_height = $image_attr[1]; + $image_new_width = $max_side; + + $image_ratio = $image_width / $image_new_width; + $image_new_height = $image_height / $image_ratio; + //width is > height + } else { + $image_width = $image_attr[0]; + $image_height = $image_attr[1]; + $image_new_height = $max_side; + + $image_ratio = $image_height / $image_new_height; + $image_new_width = $image_width / $image_ratio; + //height > width + } + + $thumbnail = imagecreatetruecolor( $image_new_width, $image_new_height); + @ imagecopyresampled( $thumbnail, $image, 0, 0, 0, 0, $image_new_width, $image_new_height, $image_attr[0], $image_attr[1] ); + + // If no filters change the filename, we'll do a default transformation. + if ( basename( $file ) == $thumb = apply_filters( 'thumbnail_filename', basename( $file ) ) ) + $thumb = preg_replace( '!(\.[^.]+)?$!', '.thumbnail' . '$1', basename( $file ), 1 ); + + $thumbpath = str_replace( basename( $file ), $thumb, $file ); + + // move the thumbnail to its final destination + if ( $type[2] == 1 ) { + if (!imagegif( $thumbnail, $thumbpath ) ) { + $error = __( "Thumbnail path invalid" ); + } + } + elseif ( $type[2] == 2 ) { + if (!imagejpeg( $thumbnail, $thumbpath ) ) { + $error = __( "Thumbnail path invalid" ); + } + } + elseif ( $type[2] == 3 ) { + if (!imagepng( $thumbnail, $thumbpath ) ) { + $error = __( "Thumbnail path invalid" ); + } + } + + } + } else { + $error = __( 'File not found' ); + } + + if (!empty ( $error ) ) { + return $error; + } else { + return apply_filters( 'wp_create_thumbnail', $thumbpath ); + } +} + +function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) { + if ( ctype_digit( $src_file ) ) // Handle int as attachment ID + $src_file = get_attached_file( $src_file ); + + $src = wp_load_image( $src_file ); + + if ( !is_resource( $src )) + return $src; + + $dst = imagecreatetruecolor( $dst_w, $dst_h ); + + if ( $src_abs ) { + $src_w -= $src_x; + $src_h -= $src_y; + } + + if (function_exists('imageantialias')) + imageantialias( $dst, true ); + + imagecopyresampled( $dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); + + if ( !$dst_file ) + $dst_file = str_replace( basename( $src_file ), 'cropped-'.basename( $src_file ), $src_file ); + + $dst_file = preg_replace( '/\\.[^\\.]+$/', '.jpg', $dst_file ); + + if ( imagejpeg( $dst, $dst_file ) ) + return $dst_file; + else + return false; +} + +function wp_generate_attachment_metadata( $attachment_id, $file ) { + $attachment = get_post( $attachment_id ); + + $metadata = array(); + if ( preg_match('!^image/!', get_post_mime_type( $attachment )) ) { + $imagesize = getimagesize($file); + $metadata['width'] = $imagesize['0']; + $metadata['height'] = $imagesize['1']; + list($uwidth, $uheight) = get_udims($metadata['width'], $metadata['height']); + $metadata['hwstring_small'] = "height='$uheight' width='$uwidth'"; + $metadata['file'] = $file; + + $max = apply_filters( 'wp_thumbnail_creation_size_limit', 3 * 1024 * 1024, $attachment_id, $file ); + + if ( $max < 0 || $metadata['width'] * $metadata['height'] < $max ) { + $max_side = apply_filters( 'wp_thumbnail_max_side_length', 128, $attachment_id, $file ); + $thumb = wp_create_thumbnail( $file, $max_side ); + + if ( @file_exists($thumb) ) + $metadata['thumb'] = basename($thumb); + } + } + return apply_filters( 'wp_generate_attachment_metadata', $metadata ); +} + +function wp_load_image( $file ) { + if ( ctype_digit( $file ) ) + $file = get_attached_file( $file ); + + if ( !file_exists( $file ) ) + return sprintf(__("File '%s' doesn't exist?"), $file); + + if ( ! function_exists('imagecreatefromstring') ) + return __('The GD image library is not installed.'); + + $contents = file_get_contents( $file ); + + $image = imagecreatefromstring( $contents ); + + if ( !is_resource( $image ) ) + return sprintf(__("File '%s' is not an image."), $file); + + return $image; +} + +function wp_shrink_dimensions( $width, $height, $wmax = 128, $hmax = 96 ) { + if ( $height <= $hmax && $width <= $wmax ) + return array( $width, $height); + elseif ( $width / $height > $wmax / $hmax ) + return array( $wmax, (int) ($height / $width * $wmax )); + else + return array( (int) ($width / $height * $hmax ), $hmax ); +} + +?> |