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If one of the two is set * to null, the resize will maintain aspect ratio according to the provided dimension. * * @since 3.5.0 * * @param int|null $max_w Image width. * @param int|null $max_h Image height. * @param bool|array $crop { * Optional. Image cropping behavior. If false, the image will be scaled (default). * If true, image will be cropped to the specified dimensions using center positions. * If an array, the image will be cropped using the array to specify the crop location: * * @type string $0 The x crop position. Accepts 'left', 'center', or 'right'. * @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'. * } * @return true|WP_Error */ public function resize( $max_w, $max_h, $crop = false ) { if ( ( $this->size['width'] === $max_w ) && ( $this->size['height'] === $max_h ) ) { return true; } $resized = $this->_resize( $max_w, $max_h, $crop ); if ( is_gd_image( $resized ) ) { imagedestroy( $this->image ); $this->image = $resized; return true; } elseif ( is_wp_error( $resized ) ) { return $resized; } return new WP_Error( 'image_resize_error', __( 'Image resize failed.' ), $this->file ); } /** * @param int $max_w * @param int $max_h * @param bool|array $crop { * Optional. Image cropping behavior. If false, the image will be scaled (default). * If true, image will be cropped to the specified dimensions using center positions. * If an array, the image will be cropped using the array to specify the crop location: * * @type string $0 The x crop position. Accepts 'left', 'center', or 'right'. * @type string $1 The y crop position. Accepts 'top', 'center', or 'bottom'. * } * @return resource|GdImage|WP_Error */ protected function _resize( $max_w, $max_h, $crop = false ) { $dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); if ( ! $dims ) { return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions' ), $this->file ); } list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; $this->set_quality( null, array( 'width' => $dst_w, 'height' => $dst_h, ) ); $resized = wp_imagecreatetruecolor( $dst_w, $dst_h ); imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); if ( is_gd_image( $resized ) ) { $this->update_size( $dst_w, $dst_h ); return $resized; } return new WP_Error( 'image_resize_error', __( 'Image resize failed.' ), $this->file ); } /** * Create multiple smaller images from a single source. * * Attempts to create all sub-sizes and returns the meta data at the end. This * may result in the server running out of resources. When it fails there may be few * "orphaned" images left over as the meta data is never returned and saved. * * As of 5.3.0 the preferred way to do this is with `make_subsize()`. It creates * the new images one at a time and allows for the meta data to be saved after * each new image is created. * * @since 3.5.0 * * @param array $sizes { * An array of image size data arrays. * * Either a height or width must be provided. * If one of the two is set to null, the resize will * maintain aspect ratio according to the source image. * * @type array ...$0 { * Array of height, width values, and whether to crop. * * @type int $width Image width. Optional if `$height` is specified. * @type int $height Image height. Optional if `$width` is specified. * @type bool|array $crop Optional. Whether to crop the image. Default false. * } * } * @return array An array of resized images' metadata by size. */ public function multi_resize( $sizes ) { $metadata = array(); foreach ( $sizes as $size => $size_data ) { $meta = $this->make_subsize( $size_data ); if ( ! is_wp_error( $meta ) ) { $metadata[ $size ] = $meta; } } return $metadata; } /** * Create an image sub-size and return the image meta data value for it. * * @since 5.3.0 * * @param array $size_data { * Array of size data. * * @type int $width The maximum width in pixels. * @type int $height The maximum height in pixels. * @type bool|array $crop Whether to crop the image to exact dimensions. * } * @return array|WP_Error The image data array for inclusion in the `sizes` array in the image meta, * WP_Error object on error. */ public function make_subsize( $size_data ) { if ( ! isset( $size_data['width'] ) && ! isset( $size_data['height'] ) ) { return new WP_Error( 'image_subsize_create_error', __( 'Cannot resize the image. Both width and height are not set.' ) ); } $orig_size = $this->size; if ( ! isset( $size_data['width'] ) ) { $size_data['width'] = null; } if ( ! isset( $size_data['height'] ) ) { $size_data['height'] = null; } if ( ! isset( $size_data['crop'] ) ) { $size_data['crop'] = false; } $resized = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); if ( is_wp_error( $resized ) ) { $saved = $resized; } else { $saved = $this->_save( $resized ); imagedestroy( $resized ); } $this->size = $orig_size; if ( ! is_wp_error( $saved ) ) { unset( $saved['path'] ); } return $saved; } /** * Crops Image. * * @since 3.5.0 * * @param int $src_x The start x position to crop from. * @param int $src_y The start y position to crop from. * @param int $src_w The width to crop. * @param int $src_h The height to crop. * @param int $dst_w Optional. The destination width. * @param int $dst_h Optional. The destination height. * @param bool $src_abs Optional. If the source crop points are absolute. * @return true|WP_Error */ public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { /* * If destination width/height isn't specified, * use same as width/height from source. */ if ( ! $dst_w ) { $dst_w = $src_w; } if ( ! $dst_h ) { $dst_h = $src_h; } foreach ( array( $src_w, $src_h, $dst_w, $dst_h ) as $value ) { if ( ! is_numeric( $value ) || (int) $value <= 0 ) { return new WP_Error( 'image_crop_error', __( 'Image crop failed.' ), $this->file ); } } $dst = wp_imagecreatetruecolor( (int) $dst_w, (int) $dst_h ); if ( $src_abs ) { $src_w -= $src_x; $src_h -= $src_y; } if ( function_exists( 'imageantialias' ) ) { imageantialias( $dst, true ); } imagecopyresampled( $dst, $this->image, 0, 0, (int) $src_x, (int) $src_y, (int) $dst_w, (int) $dst_h, (int) $src_w, (int) $src_h ); if ( is_gd_image( $dst ) ) { imagedestroy( $this->image ); $this->image = $dst; $this->update_size(); return true; } return new WP_Error( 'image_crop_error', __( 'Image crop failed.' ), $this->file ); } /** * Rotates current image counter-clockwise by $angle. * Ported from image-edit.php * * @since 3.5.0 * * @param float $angle * @return true|WP_Error */ public function rotate( $angle ) { if ( function_exists( 'imagerotate' ) ) { $transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 ); $rotated = imagerotate( $this->image, $angle, $transparency ); if ( is_gd_image( $rotated ) ) { imagealphablending( $rotated, true ); imagesavealpha( $rotated, true ); imagedestroy( $this->image ); $this->image = $rotated; $this->update_size(); return true; } } return new WP_Error( 'image_rotate_error', __( 'Image rotate failed.' ), $this->file ); } /** * Flips current image. * * @since 3.5.0 * * @param bool $horz Flip along Horizontal Axis. * @param bool $vert Flip along Vertical Axis. * @return true|WP_Error */ public function flip( $horz, $vert ) { $w = $this->size['width']; $h = $this->size['height']; $dst = wp_imagecreatetruecolor( $w, $h ); if ( is_gd_image( $dst ) ) { $sx = $vert ? ( $w - 1 ) : 0; $sy = $horz ? ( $h - 1 ) : 0; $sw = $vert ? -$w : $w; $sh = $horz ? -$h : $h; if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) { imagedestroy( $this->image ); $this->image = $dst; return true; } } return new WP_Error( 'image_flip_error', __( 'Image flip failed.' ), $this->file ); } /** * Saves current in-memory image to file. * * @since 3.5.0 * @since 5.9.0 Renamed `$filename` to `$destfilename` to match parent class * for PHP 8 named parameter support. * @since 6.0.0 The `$filesize` value was added to the returned array. * * @param string|null $destfilename Optional. Destination filename. Default null. * @param string|null $mime_type Optional. The mime-type. Default null. * @return array|WP_Error { * Array on success or WP_Error if the file failed to save. * * @type string $path Path to the image file. * @type string $file Name of the image file. * @type int $width Image width. * @type int $height Image height. * @type string $mime-type The mime type of the image. * @type int $filesize File size of the image. * } */ public function save( $destfilename = null, $mime_type = null ) { $saved = $this->_save( $this->image, $destfilename, $mime_type ); if ( ! is_wp_error( $saved ) ) { $this->file = $saved['path']; $this->mime_type = $saved['mime-type']; } return $saved; } /** * @since 3.5.0 * @since 6.0.0 The `$filesize` value was added to the returned array. * * @param resource|GdImage $image * @param string|null $filename * @param string|null $mime_type * @return array|WP_Error { * Array on success or WP_Error if the file failed to save. * * @type string $path Path to the image file. * @type string $file Name of the image file. * @type int $width Image width. * @type int $height Image height. * @type string $mime-type The mime type of the image. * @type int $filesize File size of the image. * } */ protected function _save( $image, $filename = null, $mime_type = null ) { list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); if ( ! $filename ) { $filename = $this->generate_filename( null, null, $extension ); } if ( function_exists( 'imageinterlace' ) ) { /** * Filters whether to output progressive images (if available). * * @since 6.5.0 * * @param bool $interlace Whether to use progressive images for output if available. Default false. * @param string $mime_type The mime type being saved. */ imageinterlace( $image, apply_filters( 'image_save_progressive', false, $mime_type ) ); } if ( 'image/gif' === $mime_type ) { if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } } elseif ( 'image/png' === $mime_type ) { // Convert from full colors to index colors, like original PNG. if ( function_exists( 'imageistruecolor' ) && ! imageistruecolor( $image ) ) { imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); } if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } } elseif ( 'image/jpeg' === $mime_type ) { if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, $this->get_quality() ) ) ) { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } } elseif ( 'image/webp' === $mime_type ) { if ( ! function_exists( 'imagewebp' ) || ! $this->make_image( $filename, 'imagewebp', array( $image, $filename, $this->get_quality() ) ) ) { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } } elseif ( 'image/avif' === $mime_type ) { if ( ! function_exists( 'imageavif' ) || ! $this->make_image( $filename, 'imageavif', array( $image, $filename, $this->get_quality() ) ) ) { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } } else { return new WP_Error( 'image_save_error', __( 'Image Editor Save Failed' ) ); } // Set correct file permissions. $stat = stat( dirname( $filename ) ); $perms = $stat['mode'] & 0000666; // Same permissions as parent folder, strip off the executable bits. chmod( $filename, $perms ); return array( 'path' => $filename, /** * Filters the name of the saved image file. * * @since 2.6.0 * * @param string $filename Name of the file. */ 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), 'width' => $this->size['width'], 'height' => $this->size['height'], 'mime-type' => $mime_type, 'filesize' => wp_filesize( $filename ), ); } /** * Sets Image Compression quality on a 1-100% scale. Handles WebP lossless images. * * @since 6.7.0 * @since 6.8.0 The `$dims` parameter was added. * * @param int $quality Compression Quality. Range: [1,100] * @param array $dims Optional. Image dimensions array with 'width' and 'height' keys. * @return true|WP_Error True if set successfully; WP_Error on failure. */ public function set_quality( $quality = null, $dims = array() ) { $quality_result = parent::set_quality( $quality, $dims ); if ( is_wp_error( $quality_result ) ) { return $quality_result; } else { $quality = $this->get_quality(); } // Handle setting the quality for WebP lossless images, see https://php.watch/versions/8.1/gd-webp-lossless. try { if ( 'image/webp' === $this->mime_type && defined( 'IMG_WEBP_LOSSLESS' ) ) { $webp_info = wp_get_webp_info( $this->file ); if ( ! empty( $webp_info['type'] ) && 'lossless' === $webp_info['type'] ) { $quality = IMG_WEBP_LOSSLESS; parent::set_quality( $quality, $dims ); } } } catch ( Exception $e ) { return new WP_Error( 'image_quality_error', $e->getMessage() ); } $this->quality = $quality; return true; } /** * Returns stream of current image. * * @since 3.5.0 * * @param string $mime_type The mime type of the image. * @return bool True on success, false on failure. */ public function stream( $mime_type = null ) { list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); switch ( $mime_type ) { case 'image/png': header( 'Content-Type: image/png' ); return imagepng( $this->image ); case 'image/gif': header( 'Content-Type: image/gif' ); return imagegif( $this->image ); case 'image/webp': if ( function_exists( 'imagewebp' ) ) { header( 'Content-Type: image/webp' ); return imagewebp( $this->image, null, $this->get_quality() ); } else { // Fall back to JPEG. header( 'Content-Type: image/jpeg' ); return imagejpeg( $this->image, null, $this->get_quality() ); } case 'image/avif': if ( function_exists( 'imageavif' ) ) { header( 'Content-Type: image/avif' ); return imageavif( $this->image, null, $this->get_quality() ); } // Fall back to JPEG. default: header( 'Content-Type: image/jpeg' ); return imagejpeg( $this->image, null, $this->get_quality() ); } } /** * Either calls editor's save function or handles file as a stream. * * @since 3.5.0 * * @param string $filename * @param callable $callback * @param array $arguments * @return bool */ protected function make_image( $filename, $callback, $arguments ) { if ( wp_is_stream( $filename ) ) { $arguments[1] = null; } return parent::make_image( $filename, $callback, $arguments ); } }