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class-image-upload-control.php
176 lines
| 1 | <?php |
| 2 | |
| 3 | namespace ASENHA\Classes; |
| 4 | |
| 5 | use Imagick; |
| 6 | /** |
| 7 | * Class for Image Upload Control module |
| 8 | * |
| 9 | * @since 6.9.5 |
| 10 | */ |
| 11 | class Image_Upload_Control { |
| 12 | /** |
| 13 | * Handler for image uploads. Convert and resize images. |
| 14 | * |
| 15 | * @since 4.3.0 |
| 16 | */ |
| 17 | public function image_upload_handler( $upload ) { |
| 18 | $applicable_mime_types = array( |
| 19 | 'image/bmp', |
| 20 | 'image/x-ms-bmp', |
| 21 | 'image/png', |
| 22 | 'image/jpeg', |
| 23 | 'image/jpg', |
| 24 | 'image/webp' |
| 25 | ); |
| 26 | if ( in_array( $upload['type'], $applicable_mime_types ) ) { |
| 27 | global $png_has_transparency; |
| 28 | // Exlude from conversion and resizing images with filenames ending with '-nr', e.g. birds-nr.png |
| 29 | if ( false !== strpos( $upload['file'], '-nr.' ) ) { |
| 30 | return $upload; |
| 31 | } |
| 32 | // Convert BMP |
| 33 | if ( 'image/bmp' === $upload['type'] || 'image/x-ms-bmp' === $upload['type'] ) { |
| 34 | $upload = $this->maybe_convert_image( 'bmp', $upload ); |
| 35 | } |
| 36 | // Convert PNG without transparency |
| 37 | if ( 'image/png' === $upload['type'] ) { |
| 38 | $upload = $this->maybe_convert_image( 'png', $upload ); |
| 39 | } |
| 40 | // At this point, BMPs and non-transparent PNGs are already converted to JPGs, unless excluded with '-nr' suffix. |
| 41 | // Let's perform resize operation as needed, i.e. if image dimension is larger than specified |
| 42 | $mime_types_to_resize = array( |
| 43 | 'image/jpeg', |
| 44 | 'image/jpg', |
| 45 | 'image/png', |
| 46 | 'image/webp' |
| 47 | ); |
| 48 | if ( !is_wp_error( $upload ) && in_array( $upload['type'], $mime_types_to_resize ) && filesize( $upload['file'] ) > 0 ) { |
| 49 | // https://developer.wordpress.org/reference/classes/wp_image_editor/ |
| 50 | $wp_image_editor = wp_get_image_editor( $upload['file'] ); |
| 51 | if ( !is_wp_error( $wp_image_editor ) ) { |
| 52 | $image_size = $wp_image_editor->get_size(); |
| 53 | $options = get_option( ASENHA_SLUG_U, array() ); |
| 54 | $max_width = $options['image_max_width']; |
| 55 | $max_height = $options['image_max_height']; |
| 56 | // Check upload image's dimension and only resize if larger than the defined max dimension |
| 57 | if ( isset( $image_size['width'] ) && $image_size['width'] > $max_width || isset( $image_size['height'] ) && $image_size['height'] > $max_height ) { |
| 58 | $wp_image_editor->resize( $max_width, $max_height, false ); |
| 59 | // false is for no cropping |
| 60 | if ( 'image/jpg' === $upload['type'] || 'image/jpeg' === $upload['type'] ) { |
| 61 | $wp_image_editor->set_quality( 90 ); |
| 62 | // default is 82 |
| 63 | } |
| 64 | $wp_image_editor->save( $upload['file'] ); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | return $upload; |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Convert BMP or PNG without transparency into JPG |
| 74 | * |
| 75 | * @since 4.3.0 |
| 76 | */ |
| 77 | public function maybe_convert_image( $file_extension, $upload ) { |
| 78 | global $png_has_transparency; |
| 79 | $image_object = null; |
| 80 | // Get image object from uploaded BMP/PNG |
| 81 | if ( 'bmp' === $file_extension ) { |
| 82 | if ( is_file( $upload['file'] ) ) { |
| 83 | // Generate image object from BMP for conversion to JPG later |
| 84 | if ( function_exists( 'imagecreatefrombmp' ) ) { |
| 85 | // PHP >= v7.2 |
| 86 | $image_object = imagecreatefrombmp( $upload['file'] ); |
| 87 | } else { |
| 88 | // PHP < v7.2 |
| 89 | require_once ASENHA_PATH . 'includes/bmp-to-image-object.php'; |
| 90 | $image_object = bmp_to_image_object( $upload['file'] ); |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | if ( 'png' === $file_extension ) { |
| 95 | // Detect alpha/transparency in PNG |
| 96 | $png_has_transparency = false; |
| 97 | if ( is_file( $upload['file'] ) ) { |
| 98 | // We assume GD library is present, so 'imagecreatefrompng' function is available |
| 99 | // Generate image object from PNG for potential conversion to JPG later. |
| 100 | $image_object = imagecreatefrompng( $upload['file'] ); |
| 101 | // Get image dimension |
| 102 | list( $width, $height ) = getimagesize( $upload['file'] ); |
| 103 | // Run through pixels until transparent pixel is found |
| 104 | for ($x = 0; $x < $width; $x++) { |
| 105 | for ($y = 0; $y < $height; $y++) { |
| 106 | $pixel_color_index = imagecolorat( $image_object, $x, $y ); |
| 107 | $pixel_rgba = imagecolorsforindex( $image_object, $pixel_color_index ); |
| 108 | // array of red, green, blue and alpha values |
| 109 | if ( $pixel_rgba['alpha'] > 0 ) { |
| 110 | // a pixel with alpha/transparency has been found |
| 111 | // alpha value range from 0 (completely opaque) to 127 (fully transparent). |
| 112 | // Ref: https://www.php.net/manual/en/function.imagecolorallocatealpha.php |
| 113 | $png_has_transparency = true; |
| 114 | break 2; |
| 115 | // Break both 'for' loops |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | // Do not convert PNG with alpha/transparency |
| 121 | if ( $png_has_transparency ) { |
| 122 | return $upload; |
| 123 | } |
| 124 | } |
| 125 | // When conversion from BMP/PNG to JPG is successful. Last parameter is JPG quality (0-100). |
| 126 | if ( is_object( $image_object ) ) { |
| 127 | $wp_uploads = wp_upload_dir(); |
| 128 | $old_filename = wp_basename( $upload['file'] ); |
| 129 | // Assign new, unique file name for the converted image |
| 130 | // $new_filename = wp_basename( str_ireplace( '.' . $file_extension, '.jpg', $old_filename ) ); |
| 131 | $new_filename = str_ireplace( '.' . $file_extension, '.jpg', $old_filename ); |
| 132 | $new_filename = wp_unique_filename( dirname( $upload['file'] ), $new_filename ); |
| 133 | if ( imagejpeg( $image_object, $wp_uploads['path'] . '/' . $new_filename, 90 ) ) { |
| 134 | // original image is always deleted in ASE Free |
| 135 | $keep_original_image = false; |
| 136 | if ( !$keep_original_image ) { |
| 137 | unlink( $upload['file'] ); |
| 138 | } |
| 139 | // Add converted JPG info into $upload |
| 140 | $upload['file'] = $wp_uploads['path'] . '/' . $new_filename; |
| 141 | $upload['url'] = $wp_uploads['url'] . '/' . $new_filename; |
| 142 | $upload['type'] = 'image/jpeg'; |
| 143 | } |
| 144 | } |
| 145 | return $upload; |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Generate image object from PNG/JPG with GD library |
| 150 | * |
| 151 | * @since 6.9.11 |
| 152 | */ |
| 153 | public function gd_generate_webp( |
| 154 | $file, |
| 155 | $file_extension, |
| 156 | $webp_path, |
| 157 | $webp_conversion_quality |
| 158 | ) { |
| 159 | if ( 'png' == $file_extension ) { |
| 160 | $image_object = imagecreatefrompng( $file ); |
| 161 | if ( $png_has_transparency ) { |
| 162 | imagepalettetotruecolor( $image_object ); |
| 163 | } |
| 164 | } |
| 165 | if ( 'jpg' == $file_extension || 'jpeg' == $file_extension ) { |
| 166 | $image_object = imagecreatefromjpeg( $file ); |
| 167 | } |
| 168 | // When creation of image object from PNG/JPG is successful. let's generate WebP image |
| 169 | // Second parameter is file path, last parameter is WebP quality (0-100). |
| 170 | if ( !is_null( $image_object ) && is_object( $image_object ) ) { |
| 171 | imagewebp( $image_object, $webp_path, $webp_conversion_quality ); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | } |
| 176 |