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BFI_Thumb_1_3

BFI_Thumb_1_3()


Methods

  • base_convert_arbitrary — Shortens a number into a base 36 string
  • base_convert_arbitrary — Shortens a number into a base 36 string
  • base_convert_arbitrary — Shortens a number into a base 36 string
  • thumb — Uses WP's Image Editor Class to resize and filter images Inspired by: https://github.com/sy4mil/Aqua-Resizer/blob/master/aq_resizer.php
  • thumb — Uses WP's Image Editor Class to resize and filter images Inspired by: https://github.com/sy4mil/Aqua-Resizer/blob/master/aq_resizer.php
  • thumb — Uses WP's Image Editor Class to resize and filter images Inspired by: https://github.com/sy4mil/Aqua-Resizer/blob/master/aq_resizer.php

Source

includes/libraries/bfi-thumb/bfi-thumb.php

	class BFI_Thumb_1_3 {

		/** Uses WP's Image Editor Class to resize and filter images
		 * Inspired by: https://github.com/sy4mil/Aqua-Resizer/blob/master/aq_resizer.php
		 *
		 * @param $url    string the local image URL to manipulate
		 * @param $params array the options to perform on the image. Keys and values supported:
		 *                'width' int pixels
		 *                'height' int pixels
		 *                'opacity' int 0-100
		 *                'color' string hex-color #000000-#ffffff
		 *                'grayscale' bool
		 *                'crop' bool
		 *                'negate' bool
		 *                'crop_only' bool
		 *                'crop_x' bool string
		 *                'crop_y' bool string
		 *                'crop_width' bool string
		 *                'crop_height' bool string
		 *                'quality' int 1-100
		 * @param $single boolean, if false then an array of data will be returned
		 *
		 * @return string|array
		 */
		public static function thumb( $url, $params = array(), $single = true ) {
			extract( $params );

			//validate inputs
			if ( ! $url ) {
				return false;
			}

			$crop_only = isset( $crop_only ) ? $crop_only : false;

			//define upload path & dir
			$upload_info = wp_upload_dir();
			$upload_dir = $upload_info['basedir'];
			$upload_url = $upload_info['baseurl'];
			$theme_url = get_template_directory_uri();
			$theme_dir = get_template_directory();

			// find the path of the image. Perform 2 checks:
			// #1 check if the image is in the uploads folder
			if ( strpos( $url, $upload_url ) !== false ) {
				$rel_path = str_replace( $upload_url, '', $url );
				$img_path = $upload_dir . $rel_path;
				// #2 check if the image is in the current theme folder
			} else if ( strpos( $url, $theme_url ) !== false ) {
				$rel_path = str_replace( $theme_url, '', $url );
				$img_path = $theme_dir . $rel_path;
			}

			// Fail if we can't find the image in our WP local directory
			if ( empty( $img_path ) ) {
				return $url;
			}

			// check if img path exists, and is an image indeed
			if ( ! @file_exists( $img_path ) || ! getimagesize( $img_path ) ) {
				return $url;
			}

			// This is the filename
			$basename = basename( $img_path );

			//get image info
			$info = pathinfo( $img_path );
			$ext = $info['extension'];
			list( $orig_w, $orig_h ) = getimagesize( $img_path );

			// support percentage dimensions. compute percentage based on
			// the original dimensions
			if ( isset( $width ) ) {
				if ( stripos( $width, '%' ) !== false ) {
					$width = (int) ( (float) str_replace( '%', '', $width ) / 100 * $orig_w );
				}
			}
			if ( isset( $height ) ) {
				if ( stripos( $height, '%' ) !== false ) {
					$height = (int) ( (float) str_replace( '%', '', $height ) / 100 * $orig_h );
				}
			}

			// The only purpose of this is to determine the final width and height
			// without performing any actual image manipulation, which will be used
			// to check whether a resize was previously done.
			if ( isset( $width ) && $crop_only === false ) {
				//get image size after cropping
				$dims = image_resize_dimensions( $orig_w, $orig_h, $width, isset( $height ) ? $height : null, isset( $crop ) ? $crop : false );
				$dst_w = $dims[4];
				$dst_h = $dims[5];
			} else if ( $crop_only === true ) {
				// we don't want a resize,
				// but only a crop in the image

				// get x position to start croping
				$src_x = ( isset( $crop_x ) ) ? $crop_x : 0;

				// get y position to start croping
				$src_y = ( isset( $crop_y ) ) ? $crop_y : 0;

				// width of the crop
				if ( isset( $crop_width ) ) {
					$src_w = $crop_width;
				} else if ( isset( $width ) ) {
					$src_w = $width;
				} else {
					$src_w = $orig_w;
				}

				// height of the crop
				if ( isset( $crop_height ) ) {
					$src_h = $crop_height;
				} else if ( isset( $height ) ) {
					$src_h = $height;
				} else {
					$src_h = $orig_h;
				}

				// set the width resize with the crop
				if ( isset( $crop_width ) && isset( $width ) ) {
					$dst_w = $width;
				} else {
					$dst_w = null;
				}

				// set the height resize with the crop
				if ( isset( $crop_height ) && isset( $height ) ) {
					$dst_h = $height;
				} else {
					$dst_h = null;
				}

				// allow percentages
				if ( isset( $dst_w ) ) {
					if ( stripos( $dst_w, '%' ) !== false ) {
						$dst_w = (int) ( (float) str_replace( '%', '', $dst_w ) / 100 * $orig_w );
					}
				}
				if ( isset( $dst_h ) ) {
					if ( stripos( $dst_h, '%' ) !== false ) {
						$dst_h = (int) ( (float) str_replace( '%', '', $dst_h ) / 100 * $orig_h );
					}
				}

				$dims = image_resize_dimensions( $src_w, $src_h, $dst_w, $dst_h, false );
				$dst_w = $dims[4];
				$dst_h = $dims[5];

				// Make the pos x and pos y work with percentages
				if ( stripos( $src_x, '%' ) !== false ) {
					$src_x = (int) ( (float) str_replace( '%', '', $width ) / 100 * $orig_w );
				}
				if ( stripos( $src_y, '%' ) !== false ) {
					$src_y = (int) ( (float) str_replace( '%', '', $height ) / 100 * $orig_h );
				}

				// allow center to position crop start
				if ( $src_x === 'center' ) {
					$src_x = ( $orig_w - $src_w ) / 2;
				}
				if ( $src_y === 'center' ) {
					$src_y = ( $orig_h - $src_h ) / 2;
				}
			}

			// create the suffix for the saved file
			// we can use this to check whether we need to create a new file or just use an existing one.
			$suffix = (string) filemtime( $img_path ) . ( isset( $width ) ? str_pad( (string) $width, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $height ) ? str_pad( (string) $height, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $opacity ) ? str_pad( (string) $opacity, 3, '0', STR_PAD_LEFT ) : '100' ) . ( isset( $color ) ? str_pad( preg_replace( '#^\##', '', $color ), 8, '0', STR_PAD_LEFT ) : '00000000' ) . ( isset( $grayscale ) ? ( $grayscale ? '1' : '0' ) : '0' ) . ( isset( $crop ) ? ( $crop ? '1' : '0' ) : '0' ) . ( isset( $negate ) ? ( $negate ? '1' : '0' ) : '0' ) . ( isset( $crop_only ) ? ( $crop_only ? '1' : '0' ) : '0' ) . ( isset( $src_x ) ? str_pad( (string) $src_x, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $src_y ) ? str_pad( (string) $src_y, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $src_w ) ? str_pad( (string) $src_w, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $src_h ) ? str_pad( (string) $src_h, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $dst_w ) ? str_pad( (string) $dst_w, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( isset( $dst_h ) ? str_pad( (string) $dst_h, 5, '0', STR_PAD_LEFT ) : '00000' ) . ( ( isset ( $quality ) && $quality > 0 && $quality <= 100 ) ? ( $quality ? (string) $quality : '0' ) : '0' );
			$suffix = self::base_convert_arbitrary( $suffix, 10, 36 );

			// use this to check if cropped image already exists, so we can return that instead
			$dst_rel_path = str_replace( '.' . $ext, '', basename( $img_path ) );

			// If opacity is set, change the image type to png
			if ( isset( $opacity ) ) {
				$ext = 'png';
			}


			// Create the upload subdirectory, this is where
			// we store all our generated images
			if ( defined( 'BFITHUMB_UPLOAD_DIR' ) ) {
				$upload_dir .= "/" . BFITHUMB_UPLOAD_DIR;
				$upload_url .= "/" . BFITHUMB_UPLOAD_DIR;
			} else {
				$upload_dir .= "/bfi_thumb";
				$upload_url .= "/bfi_thumb";
			}
			if ( ! is_dir( $upload_dir ) ) {
				wp_mkdir_p( $upload_dir );
			}


			// desination paths and urls
			$destfilename = "{$upload_dir}/{$dst_rel_path}-{$suffix}.{$ext}";

			// The urls generated have lower case extensions regardless of the original case
			$ext = strtolower( $ext );
			$img_url = "{$upload_url}/{$dst_rel_path}-{$suffix}.{$ext}";

			// if file exists, just return it
			if ( @file_exists( $destfilename ) && getimagesize( $destfilename ) ) {
			} else {
				// perform resizing and other filters
				$editor = wp_get_image_editor( $img_path );

				if ( is_wp_error( $editor ) ) {
					return false;
				}

				/*
				 * Perform image manipulations
				 */
				if ( $crop_only === false ) {
					if ( ( isset( $width ) && $width ) || ( isset( $height ) && $height ) ) {
						if ( is_wp_error( $editor->resize( isset( $width ) ? $width : null, isset( $height ) ? $height : null, isset( $crop ) ? $crop : false ) ) ) {
							return false;
						}
					}
				} else {
					if ( is_wp_error( $editor->crop( $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h ) ) ) {
						return false;
					}
				}

				if ( isset( $negate ) ) {
					if ( $negate ) {
						if ( is_wp_error( $editor->negate() ) ) {
							return false;
						}
					}
				}

				if ( isset( $opacity ) ) {
					if ( is_wp_error( $editor->opacity( $opacity ) ) ) {
						return false;
					}
				}

				if ( isset( $grayscale ) ) {
					if ( $grayscale ) {
						if ( is_wp_error( $editor->grayscale() ) ) {
							return false;
						}
					}
				}

				if ( isset( $color ) ) {
					if ( is_wp_error( $editor->colorize( $color ) ) ) {
						return false;
					}
				}

				// set the image quality (1-100) to save this image at
				if ( isset( $quality ) && $quality > 0 && $quality <= 100 && $ext != 'png' ) {
					$editor->set_quality( $quality );
				}

				// save our new image
				$mime_type = isset( $opacity ) ? 'image/png' : null;
				$resized_file = $editor->save( $destfilename, $mime_type );
			}

			//return the output
			if ( $single ) {
				$image = $img_url;
			} else {
				//array return
				$image = array(
					0 => $img_url,
					1 => isset( $dst_w ) ? $dst_w : $orig_w,
					2 => isset( $dst_h ) ? $dst_h : $orig_h,
				);
			}

			return $image;
		}

		/** Shortens a number into a base 36 string
		 *
		 * @param $number   string a string of numbers to convert
		 * @param $fromBase starting base
		 * @param $toBase   base to convert the number to
		 *
		 * @return string base converted characters
		 */
		protected static function base_convert_arbitrary( $number, $fromBase, $toBase ) {
			$digits = '0123456789abcdefghijklmnopqrstuvwxyz';
			$length = strlen( $number );
			$result = '';

			$nibbles = array();
			for ( $i = 0; $i < $length; ++$i ) {
				$nibbles[ $i ] = strpos( $digits, $number[ $i ] );
			}

			do {
				$value = 0;
				$newlen = 0;

				for ( $i = 0; $i < $length; ++$i ) {

					$value = $value * $fromBase + $nibbles[ $i ];

					if ( $value >= $toBase ) {
						$nibbles[ $newlen++ ] = (int) ( $value / $toBase );
						$value %= $toBase;
					} else if ( $newlen > 0 ) {
						$nibbles[ $newlen++ ] = 0;
					}
				}

				$length = $newlen;
				$result = $digits[ $value ] . $result;
			} while ( $newlen != 0 );

			return $result;
		}
	}
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