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1 <?php |
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2 /** |
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3 * WordPress GD Image Editor |
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4 * |
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5 * @package WordPress |
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6 * @subpackage Image_Editor |
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7 */ |
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8 |
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9 /** |
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10 * WordPress Image Editor Class for Image Manipulation through GD |
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11 * |
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12 * @since 3.5.0 |
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13 * @package WordPress |
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14 * @subpackage Image_Editor |
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15 * @uses WP_Image_Editor Extends class |
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16 */ |
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17 class WP_Image_Editor_GD extends WP_Image_Editor { |
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18 |
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19 protected $image = false; // GD Resource |
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20 |
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21 function __destruct() { |
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22 if ( $this->image ) { |
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23 // we don't need the original in memory anymore |
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24 imagedestroy( $this->image ); |
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25 } |
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26 } |
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27 |
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28 /** |
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29 * Checks to see if current environment supports GD. |
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30 * |
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31 * @since 3.5.0 |
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32 * @access public |
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33 * |
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34 * @return boolean |
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35 */ |
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36 public static function test( $args = array() ) { |
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37 if ( ! extension_loaded('gd') || ! function_exists('gd_info') ) |
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38 return false; |
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39 |
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40 // On some setups GD library does not provide imagerotate() - Ticket #11536 |
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41 if ( isset( $args['methods'] ) && |
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42 in_array( 'rotate', $args['methods'] ) && |
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43 ! function_exists('imagerotate') ){ |
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44 |
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45 return false; |
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46 } |
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47 |
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48 return true; |
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49 } |
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50 |
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51 /** |
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52 * Checks to see if editor supports the mime-type specified. |
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53 * |
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54 * @since 3.5.0 |
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55 * @access public |
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56 * |
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57 * @param string $mime_type |
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58 * @return boolean |
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59 */ |
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60 public static function supports_mime_type( $mime_type ) { |
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61 $image_types = imagetypes(); |
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62 switch( $mime_type ) { |
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63 case 'image/jpeg': |
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64 return ($image_types & IMG_JPG) != 0; |
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65 case 'image/png': |
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66 return ($image_types & IMG_PNG) != 0; |
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67 case 'image/gif': |
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68 return ($image_types & IMG_GIF) != 0; |
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69 } |
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70 |
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71 return false; |
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72 } |
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73 |
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74 /** |
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75 * Loads image from $this->file into new GD Resource. |
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76 * |
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77 * @since 3.5.0 |
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78 * @access protected |
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79 * |
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80 * @return boolean|\WP_Error |
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81 */ |
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82 public function load() { |
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83 if ( $this->image ) |
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84 return true; |
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85 |
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86 if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) ) |
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87 return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file ); |
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88 |
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89 // Set artificially high because GD uses uncompressed images in memory |
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90 @ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) ); |
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91 $this->image = @imagecreatefromstring( file_get_contents( $this->file ) ); |
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92 |
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93 if ( ! is_resource( $this->image ) ) |
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94 return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file ); |
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95 |
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96 $size = @getimagesize( $this->file ); |
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97 if ( ! $size ) |
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98 return new WP_Error( 'invalid_image', __('Could not read image size.'), $this->file ); |
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99 |
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100 $this->update_size( $size[0], $size[1] ); |
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101 $this->mime_type = $size['mime']; |
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102 |
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103 return true; |
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104 } |
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105 |
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106 /** |
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107 * Sets or updates current image size. |
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108 * |
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109 * @since 3.5.0 |
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110 * @access protected |
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111 * |
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112 * @param int $width |
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113 * @param int $height |
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114 */ |
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115 protected function update_size( $width = false, $height = false ) { |
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116 if ( ! $width ) |
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117 $width = imagesx( $this->image ); |
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118 |
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119 if ( ! $height ) |
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120 $height = imagesy( $this->image ); |
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121 |
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122 return parent::update_size( $width, $height ); |
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123 } |
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124 |
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125 /** |
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126 * Resizes current image. |
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127 * Wraps _resize, since _resize returns a GD Resource. |
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128 * |
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129 * @since 3.5.0 |
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130 * @access public |
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131 * |
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132 * @param int $max_w |
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133 * @param int $max_h |
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134 * @param boolean $crop |
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135 * @return boolean|WP_Error |
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136 */ |
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137 public function resize( $max_w, $max_h, $crop = false ) { |
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138 if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) |
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139 return true; |
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140 |
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141 $resized = $this->_resize( $max_w, $max_h, $crop ); |
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142 |
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143 if ( is_resource( $resized ) ) { |
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144 imagedestroy( $this->image ); |
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145 $this->image = $resized; |
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146 return true; |
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147 |
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148 } elseif ( is_wp_error( $resized ) ) |
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149 return $resized; |
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150 |
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151 return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); |
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152 } |
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153 |
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154 protected function _resize( $max_w, $max_h, $crop = false ) { |
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155 $dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); |
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156 if ( ! $dims ) { |
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157 return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions'), $this->file ); |
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158 } |
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159 list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; |
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160 |
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161 $resized = wp_imagecreatetruecolor( $dst_w, $dst_h ); |
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162 imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); |
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163 |
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164 if ( is_resource( $resized ) ) { |
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165 $this->update_size( $dst_w, $dst_h ); |
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166 return $resized; |
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167 } |
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168 |
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169 return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); |
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170 } |
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171 |
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172 /** |
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173 * Processes current image and saves to disk |
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174 * multiple sizes from single source. |
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175 * |
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176 * @since 3.5.0 |
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177 * @access public |
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178 * |
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179 * @param array $sizes { {'width'=>int, 'height'=>int, 'crop'=>bool}, ... } |
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180 * @return array |
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181 */ |
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182 public function multi_resize( $sizes ) { |
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183 $metadata = array(); |
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184 $orig_size = $this->size; |
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185 |
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186 foreach ( $sizes as $size => $size_data ) { |
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187 $image = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); |
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188 |
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189 if( ! is_wp_error( $image ) ) { |
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190 $resized = $this->_save( $image ); |
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191 |
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192 imagedestroy( $image ); |
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193 |
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194 if ( ! is_wp_error( $resized ) && $resized ) { |
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195 unset( $resized['path'] ); |
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196 $metadata[$size] = $resized; |
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197 } |
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198 } |
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199 |
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200 $this->size = $orig_size; |
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201 } |
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202 |
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203 return $metadata; |
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204 } |
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205 |
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206 /** |
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207 * Crops Image. |
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208 * |
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209 * @since 3.5.0 |
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210 * @access public |
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211 * |
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212 * @param string|int $src The source file or Attachment ID. |
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213 * @param int $src_x The start x position to crop from. |
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214 * @param int $src_y The start y position to crop from. |
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215 * @param int $src_w The width to crop. |
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216 * @param int $src_h The height to crop. |
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217 * @param int $dst_w Optional. The destination width. |
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218 * @param int $dst_h Optional. The destination height. |
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219 * @param boolean $src_abs Optional. If the source crop points are absolute. |
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220 * @return boolean|WP_Error |
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221 */ |
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222 public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { |
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223 // If destination width/height isn't specified, use same as |
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224 // width/height from source. |
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225 if ( ! $dst_w ) |
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226 $dst_w = $src_w; |
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227 if ( ! $dst_h ) |
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228 $dst_h = $src_h; |
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229 |
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230 $dst = wp_imagecreatetruecolor( $dst_w, $dst_h ); |
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231 |
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232 if ( $src_abs ) { |
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233 $src_w -= $src_x; |
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234 $src_h -= $src_y; |
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235 } |
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236 |
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237 if ( function_exists( 'imageantialias' ) ) |
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238 imageantialias( $dst, true ); |
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239 |
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240 imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); |
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241 |
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242 if ( is_resource( $dst ) ) { |
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243 imagedestroy( $this->image ); |
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244 $this->image = $dst; |
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245 $this->update_size(); |
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246 return true; |
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247 } |
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248 |
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249 return new WP_Error( 'image_crop_error', __('Image crop failed.'), $this->file ); |
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250 } |
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251 |
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252 /** |
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253 * Rotates current image counter-clockwise by $angle. |
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254 * Ported from image-edit.php |
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255 * |
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256 * @since 3.5.0 |
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257 * @access public |
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258 * |
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259 * @param float $angle |
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260 * @return boolean|WP_Error |
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261 */ |
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262 public function rotate( $angle ) { |
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263 if ( function_exists('imagerotate') ) { |
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264 $rotated = imagerotate( $this->image, $angle, 0 ); |
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265 |
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266 if ( is_resource( $rotated ) ) { |
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267 imagedestroy( $this->image ); |
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268 $this->image = $rotated; |
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269 $this->update_size(); |
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270 return true; |
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271 } |
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272 } |
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273 return new WP_Error( 'image_rotate_error', __('Image rotate failed.'), $this->file ); |
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274 } |
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275 |
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276 /** |
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277 * Flips current image. |
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278 * |
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279 * @since 3.5.0 |
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280 * @access public |
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281 * |
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282 * @param boolean $horz Horizontal Flip |
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283 * @param boolean $vert Vertical Flip |
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284 * @returns boolean|WP_Error |
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285 */ |
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286 public function flip( $horz, $vert ) { |
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287 $w = $this->size['width']; |
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288 $h = $this->size['height']; |
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289 $dst = wp_imagecreatetruecolor( $w, $h ); |
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290 |
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291 if ( is_resource( $dst ) ) { |
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292 $sx = $vert ? ($w - 1) : 0; |
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293 $sy = $horz ? ($h - 1) : 0; |
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294 $sw = $vert ? -$w : $w; |
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295 $sh = $horz ? -$h : $h; |
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296 |
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297 if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) { |
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298 imagedestroy( $this->image ); |
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299 $this->image = $dst; |
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300 return true; |
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301 } |
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302 } |
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303 return new WP_Error( 'image_flip_error', __('Image flip failed.'), $this->file ); |
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304 } |
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305 |
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306 /** |
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307 * Saves current in-memory image to file. |
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308 * |
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309 * @since 3.5.0 |
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310 * @access public |
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311 * |
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312 * @param string $destfilename |
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313 * @param string $mime_type |
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314 * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} |
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315 */ |
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316 public function save( $filename = null, $mime_type = null ) { |
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317 $saved = $this->_save( $this->image, $filename, $mime_type ); |
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318 |
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319 if ( ! is_wp_error( $saved ) ) { |
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320 $this->file = $saved['path']; |
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321 $this->mime_type = $saved['mime-type']; |
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322 } |
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323 |
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324 return $saved; |
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325 } |
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326 |
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327 protected function _save( $image, $filename = null, $mime_type = null ) { |
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328 list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); |
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329 |
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330 if ( ! $filename ) |
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331 $filename = $this->generate_filename( null, null, $extension ); |
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332 |
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333 if ( 'image/gif' == $mime_type ) { |
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334 if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) |
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335 return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
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336 } |
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337 elseif ( 'image/png' == $mime_type ) { |
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338 // convert from full colors to index colors, like original PNG. |
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339 if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) ) |
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340 imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); |
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341 |
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342 if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename ) ) ) |
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343 return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
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344 } |
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345 elseif ( 'image/jpeg' == $mime_type ) { |
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346 if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, apply_filters( 'jpeg_quality', $this->quality, 'image_resize' ) ) ) ) |
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347 return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
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348 } |
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349 else { |
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350 return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
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351 } |
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352 |
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353 // Set correct file permissions |
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354 $stat = stat( dirname( $filename ) ); |
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355 $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits |
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356 @ chmod( $filename, $perms ); |
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357 |
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358 return array( |
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359 'path' => $filename, |
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360 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), |
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361 'width' => $this->size['width'], |
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362 'height' => $this->size['height'], |
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363 'mime-type'=> $mime_type, |
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364 ); |
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365 } |
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366 |
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367 /** |
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368 * Returns stream of current image. |
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369 * |
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370 * @since 3.5.0 |
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371 * @access public |
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372 * |
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373 * @param string $mime_type |
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374 */ |
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375 public function stream( $mime_type = null ) { |
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376 list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); |
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377 |
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378 switch ( $mime_type ) { |
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379 case 'image/png': |
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380 header( 'Content-Type: image/png' ); |
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381 return imagepng( $this->image ); |
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382 case 'image/gif': |
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383 header( 'Content-Type: image/gif' ); |
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384 return imagegif( $this->image ); |
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385 default: |
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386 header( 'Content-Type: image/jpeg' ); |
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387 return imagejpeg( $this->image, null, $this->quality ); |
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388 } |
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389 } |
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390 } |