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<?php /** * image processing functions * @package core * */ // force UTF-8 Ø // functions-image.php - HEADERS NOT SENT YET!
/** * If in debug mode, prints the given error message and continues; otherwise redirects * to the given error message image and exits; designed for a production gallery. * @param $errormessage string the error message to print if $_GET['debug'] is set. * @param $errorimg string the filename of the error image to display for production. Defaults * to 'err-imagegeneral.png'. Images should be located in /zen/images . */ function imageError($status_text, $errormessage, $errorimg = 'err-imagegeneral.png') { global $newfilename, $album, $image; $debug = isset($_GET['debug']); if ($debug) { echo('<strong>' . sprintf(gettext('Zenphoto Image Processing Error: %s'), $errormessage) . '</strong>' . '<br /><br />' . sprintf(gettext('Request URI: [ <code>%s</code> ]'), html_encode(getRequestURI())) . '<br />PHP_SELF: [ <code>' . sanitize($_SERVER['PHP_SELF'], 3) . '</code> ]' . (empty($newfilename) ? '' : '<br />' . sprintf(gettext('Cache: [<code>%s</code>]'), '/' . CACHEFOLDER . '/' . sanitize($newfilename, 3)) . ' ') . (empty($image) || empty($album) ? '' : ' <br />' . sprintf(gettext('Image: [<code>%s</code>]'), sanitize($album . '/' . $image, 3)) . ' <br />')); } else { if (DEBUG_IMAGE_ERR) { trigger_error($errormessage, E_USER_NOTICE); } header("HTTP/1.0 $status_text"); header("Status: $status_text"); header('Location: ' . FULLWEBPATH . '/' . ZENFOLDER . '/images/' . $errorimg); } exitZP(); }
/** * Prints debug information from the arguments to i.php. * * @param string $album alubm name * @param string $image image name * @param array $args size/crop arguments * @param string $imgfile the filename of the image */ function imageDebug($album, $image, $args, $imgfile) { list($size, $width, $height, $cw, $ch, $cx, $cy, $quality, $thumb, $crop) = $args; echo "Album: [ " . $album . " ], Image: [ " . $image . " ]<br /><br />"; if (file_exists($imgfile)) { echo "Image filesize: " . filesize($imgfile); } else { echo "Image file not found."; } echo '<br /><br />'; echo "<strong>" . gettext("Debug") . " <code>i.php</code> | " . gettext("Arguments:") . "</strong><br />\n\n" ?> <ul> <li><?php echo gettext("size ="); ?> <strong> <?php echo sanitize($size, 3) ?> </strong></li> <li><?php echo gettext("width =") ?> <strong> <?php echo sanitize($width, 3) ?> </strong></li> <li><?php echo gettext("height =") ?> <strong> <?php echo sanitize($height, 3) ?> </strong></li> <li><?php echo gettext("cw =") ?> <strong> <?php echo sanitize($cw, 3) ?> </strong></li> <li><?php echo gettext("ch =") ?> <strong> <?php echo sanitize($ch, 3) ?> </strong></li> <li><?php echo gettext("cx =") ?> <strong> <?php echo sanitize($cx, 3) ?> </strong></li> <li><?php echo gettext("cy =") ?> <strong> <?php echo sanitize($cy, 3) ?> </strong></li> <li><?php echo gettext("quality =") ?> <strong> <?php echo sanitize($quality, 3) ?> </strong></li> <li><?php echo gettext("thumb =") ?> <strong> <?php echo sanitize($thumb, 3) ?> </strong></li> <li><?php echo gettext("crop =") ?> <strong> <?php echo sanitize($crop, 3) ?> </strong></li> </ul> <?php }
/** * Calculates proprotional width and height * Used internally by cacheImage * * Returns array containing the new width and height * * @param int $size * @param int $width * @param int $height * @param int $w * @param int $h * @param int $thumb * @param int $image_use_side * @param int $dim * @return array */ function propSizes($size, $width, $height, $w, $h, $thumb, $image_use_side, $dim) { $hprop = round(($h / $w) * $dim); $wprop = round(($w / $h) * $dim); if ($size) { if ((($thumb || ($image_use_side == 'longest')) && $h > $w) || ($image_use_side == 'height') || ($image_use_side == 'shortest' && $h < $w)) { $newh = $dim; // height is the size and width is proportional $neww = $wprop; } else { $neww = $dim; // width is the size and height is proportional $newh = $hprop; } } else { // length and/or width is set, size is NULL (Thumbs work the same as image in this case) if ($height) { $newh = $height; // height is supplied, use it } else { $newh = $hprop; // height not supplied, use the proprotional } if ($width) { $neww = $width; // width is supplied, use it } else { $neww = $wprop; // width is not supplied, use the proportional } } if (DEBUG_IMAGE) debugLog("propSizes(\$size=$size, \$width=$width, \$height=$height, \$w=$w, \$h=$h, \$thumb=$thumb, \$image_use_side=$image_use_side, \$dim=$dim):: \$wprop=$wprop; \$hprop=$hprop; \$neww=$neww; \$newh=$newh"); return array($neww, $newh); }
/** * iptc_make_tag() function by Thies C. Arntzen * @param $rec * @param $data * @param $value */ function iptc_make_tag($rec, $data, $value) { $length = strlen($value); $retval = chr(0x1C) . chr($rec) . chr($data); if ($length < 0x8000) { $retval .= chr($length >> 8) . chr($length & 0xFF); } else { $retval .= chr(0x80) . chr(0x04) . chr(($length >> 24) & 0xFF) . chr(($length >> 16) & 0xFF) . chr(($length >> 8) & 0xFF) . chr($length & 0xFF); } return $retval . $value; }
/** * Creates the cache folder version of the image, including watermarking * * @param string $newfilename the name of the file when it is in the cache * @param string $imgfile the image name * @param array $args the cropping arguments * @param bool $allow_watermark set to true if image may be watermarked * @param string $theme the current theme * @param string $album the album containing the image */ function cacheImage($newfilename, $imgfile, $args, $allow_watermark = false, $theme, $album) { global $_zp_gallery; try { @list($size, $width, $height, $cw, $ch, $cx, $cy, $quality, $thumb, $crop, $thumbstandin, $passedWM, $adminrequest, $effects) = $args; // Set the config variables for convenience. $image_use_side = getOption('image_use_side'); $upscale = getOption('image_allow_upscale'); $allowscale = true; $sharpenthumbs = getOption('thumb_sharpen'); $sharpenimages = getOption('image_sharpen'); $id = $im = NULL; $watermark_use_image = getAlbumInherited($album, 'watermark', $id); if (empty($watermark_use_image)) { $watermark_use_image = IMAGE_WATERMARK; } if (!$effects) { if ($thumb && getOption('thumb_gray')) { $effects = 'gray'; } else if (getOption('image_gray')) { $effects = 'gray'; } } $newfile = SERVERCACHE . $newfilename; mkdir_recursive(dirname($newfile), FOLDER_MOD); if (DEBUG_IMAGE) debugLog("cacheImage(\$imgfile=" . basename($imgfile) . ", \$newfilename=$newfilename, \$allow_watermark=$allow_watermark, \$theme=$theme) \$size=$size, \$width=$width, \$height=$height, \$cw=$cw, \$ch=$ch, \$cx=" . (is_null($cx) ? 'NULL' : $cx) . ", \$cy=" . (is_null($cy) ? 'NULL' : $cy) . ", \$quality=$quality, \$thumb=$thumb, \$crop=$crop \$image_use_side=$image_use_side; \$upscale=$upscale);"); // Check for the source image. if (!file_exists($imgfile) || !is_readable($imgfile)) { imageError('404 Not Found', sprintf(gettext('Image %s not found or is unreadable.'), filesystemToInternal($imgfile)), 'err-imagenotfound.png'); } $rotate = false; if (zp_imageCanRotate()) { $rotate = getImageRotation($imgfile); } $s = getSuffix($imgfile); if (function_exists('exif_thumbnail') && getOption('use_embedded_thumb') && ($s == 'jpg' || $s == 'jpeg')) { $im = exif_thumbnail($imgfile, $tw, $th, $tt); if ($im) { if ($size) { $big_enough = $tw >= $size && $th >= $size; } else { $big_enough = $tw >= $width && $th >= $height; } if ($big_enough) { $im = zp_imageFromString($im); if (DEBUG_IMAGE && $im) debugLog(sprintf(gettext('Using %1$ux%2$u %3$s thumbnail image.'), $tw, $th, image_type_to_mime_type($tt))); } else { $im = false; } } else { $im = false; } } if (!$im) { $im = zp_imageGet($imgfile); } if (!$im) { imageError('404 Not Found', sprintf(gettext('Image %s not renderable (imageGet).'), filesystemToInternal($imgfile)), 'err-failimage.png'); } if ($rotate) { if (DEBUG_IMAGE) debugLog("cacheImage:rotate->$rotate"); $im = zp_rotateImage($im, $rotate); if (!$im) { imageError('404 Not Found', sprintf(gettext('Image %s not rotatable.'), filesystemToInternal($imgfile)), 'err-failimage.png'); } } $w = zp_imageWidth($im); $h = zp_imageHeight($im); // Give the sizing dimension to $dim $ratio_in = ''; $ratio_out = ''; $crop = ($crop || $cw != 0 || $ch != 0); if (!empty($size)) { $dim = $size; if ($crop) { $dim = $size; if (!$ch) $ch = $size; if (!$cw) $cw = $size; $width = $cw; $height = $ch; $size = false; } else { $width = $height = false; } } else if (!empty($width) && !empty($height)) { $ratio_in = $h / $w; $ratio_out = $height / $width; if ($ratio_in > $ratio_out) { // image is taller than desired, $height is the determining factor $thumb = true; $dim = $width; if (!$ch) $ch = $height; } else { // image is wider than desired, $width is the determining factor $dim = $height; if (!$cw) $cw = $width; } } else if (!empty($width)) { $dim = $width; $size = $height = false; } else if (!empty($height)) { $dim = $height; $size = $width = false; } else { // There's a problem up there somewhere... imageError('404 Not Found', sprintf(gettext('Unknown error processing %s! Please report to the developers at <a href="http://www.zenphoto.org/">www.zenphoto.org</a>'), filesystemToInternal($imgfile)), 'err-imagegeneral.png'); }
$sizes = propSizes($size, $width, $height, $w, $h, $thumb, $image_use_side, $dim); list($neww, $newh) = $sizes;
if (DEBUG_IMAGE) debugLog("cacheImage:" . basename($imgfile) . ": \$size=$size, \$width=$width, \$height=$height, \$w=$w; \$h=$h; \$cw=$cw, " . "\$ch=$ch, \$cx=$cx, \$cy=$cy, \$quality=$quality, \$thumb=$thumb, \$crop=$crop, \$newh=$newh, \$neww=$neww, \$dim=$dim, " . "\$ratio_in=$ratio_in, \$ratio_out=$ratio_out \$upscale=$upscale \$rotate=$rotate \$effects=$effects");
if (!$upscale && $newh >= $h && $neww >= $w) { // image is the same size or smaller than the request $neww = $w; $newh = $h; $allowscale = false; if ($crop) { if ($width > $neww) { $width = $neww; } if ($height > $newh) { $height = $newh; } } if (DEBUG_IMAGE) debugLog("cacheImage:no upscale " . basename($imgfile) . ": \$newh=$newh, \$neww=$neww, \$crop=$crop, \$thumb=$thumb, \$rotate=$rotate, watermark=" . $watermark_use_image); }
$watermark_image = false; if ($passedWM) { if ($passedWM != NO_WATERMARK) { $watermark_image = getWatermarkPath($passedWM); if (!file_exists($watermark_image)) { $watermark_image = SERVERPATH . '/' . ZENFOLDER . '/images/imageDefault.png'; } } } else { if ($allow_watermark) { $watermark_image = $watermark_use_image; if ($watermark_image) { if ($watermark_image != NO_WATERMARK) { $watermark_image = getWatermarkPath($watermark_image); if (!file_exists($watermark_image)) { $watermark_image = SERVERPATH . '/' . ZENFOLDER . '/images/imageDefault.png'; } } } } }
// Crop the image if requested. if ($crop) { if ($cw > $ch) { $ir = $ch / $cw; } else { $ir = $cw / $ch; } if ($size) { $neww = $size; $newh = $ir * $size; } else { $neww = $width; $newh = $height; if ($neww > $newh) { if ($newh === false) { $newh = $ir * $neww; } } else { if ($neww === false) { $neww = $ir * $newh; } } } if (is_null($cx) && is_null($cy)) { // scale crop to max of image // set crop scale factor $cf = 1; if ($cw) $cf = min($cf, $cw / $neww); if ($ch) $cf = min($cf, $ch / $newh); // set the image area of the crop (use the most image possible, rule of thirds positioning) if (!$cw || $w / $cw * $ch > $h) { $cw = round($h / $ch * $cw * $cf); $ch = round($h * $cf); $cx = round(($w - $cw) / 3); } else { $ch = round($w / $cw * $ch * $cf); $cw = round($w * $cf); $cy = round(($h - $ch) / 3); } } else { // custom crop if (!$cw || $cw > $w) $cw = $w; if (!$ch || $ch > $h) $ch = $h; } // force the crop to be within the image if ($cw + $cx > $w) $cx = $w - $cw; if ($cx < 0) { $cw = $cw + $cx; $cx = 0; } if ($ch + $cy > $h) $cy = $h - $ch; if ($cy < 0) { $ch = $ch + $cy; $cy = 0; } if (DEBUG_IMAGE) debugLog("cacheImage:crop " . basename($imgfile) . ":\$size=$size, \$width=$width, \$height=$height, \$cw=$cw, \$ch=$ch, \$cx=$cx, \$cy=$cy, \$quality=$quality, \$thumb=$thumb, \$crop=$crop, \$rotate=$rotate"); $newim = zp_createImage($neww, $newh); if (!zp_resampleImage($newim, $im, 0, 0, $cx, $cy, $neww, $newh, $cw, $ch)) { imageError('404 Not Found', sprintf(gettext('Image %s not renderable (resample).'), filesystemToInternal($imgfile)), 'err-failimage.png'); } } else { if ($newh >= $h && $neww >= $w && !$rotate && !$effects && !$watermark_image && (!$upscale || $newh == $h && $neww == $w)) { // we can just use the original! if (SYMLINK && @symlink($imgfile, $newfile)) { if (DEBUG_IMAGE) debugLog("cacheImage:symlink original " . basename($imgfile) . ":\$size=$size, \$width=$width, \$height=$height, \$dim=$dim, \$neww=$neww; \$newh=$newh; \$quality=$quality, \$thumb=$thumb, \$crop=$crop, \$rotate=$rotate; \$allowscale=$allowscale;"); clearstatcache(); return true; } else if (@copy($imgfile, $newfile)) { if (DEBUG_IMAGE) debugLog("cacheImage:copy original " . basename($imgfile) . ":\$size=$size, \$width=$width, \$height=$height, \$dim=$dim, \$neww=$neww; \$newh=$newh; \$quality=$quality, \$thumb=$thumb, \$crop=$crop, \$rotate=$rotate; \$allowscale=$allowscale;"); clearstatcache(); return true; } } if ($allowscale) { $sizes = propSizes($size, $width, $height, $w, $h, $thumb, $image_use_side, $dim); list($neww, $newh) = $sizes; } if (DEBUG_IMAGE) debugLog("cacheImage:no crop " . basename($imgfile) . ":\$size=$size, \$width=$width, \$height=$height, \$dim=$dim, \$neww=$neww; \$newh=$newh; \$quality=$quality, \$thumb=$thumb, \$crop=$crop, \$rotate=$rotate; \$allowscale=$allowscale;"); $newim = zp_createImage($neww, $newh); if (!zp_resampleImage($newim, $im, 0, 0, 0, 0, $neww, $newh, $w, $h)) { imageError('404 Not Found', sprintf(gettext('Image %s not renderable (resample).'), filesystemToInternal($imgfile)), 'err-failimage.png'); } if (($thumb && $sharpenthumbs) || (!$thumb && $sharpenimages)) { if (!zp_imageUnsharpMask($newim, getOption('sharpen_amount'), getOption('sharpen_radius'), getOption('sharpen_threshold'))) { imageError('404 Not Found', sprintf(gettext('Image %s not renderable (unsharp).'), filesystemToInternal($imgfile)), 'err-failimage.png'); } } }
$imgEffects = explode(',', $effects); if (in_array('gray', $imgEffects)) { zp_imageGray($newim); }
if ($watermark_image) { $offset_h = getOption('watermark_h_offset') / 100; $offset_w = getOption('watermark_w_offset') / 100; $percent = getOption('watermark_scale') / 100; $watermark = zp_imageGet($watermark_image); if (!$watermark) { imageError('404 Not Found', sprintf(gettext('Watermark %s not renderable.'), $watermark_image), 'err-failimage.png'); } $watermark_width = zp_imageWidth($watermark); $watermark_height = zp_imageHeight($watermark); $imw = zp_imageWidth($newim); $imh = zp_imageHeight($newim); $nw = sqrt(($imw * $imh * $percent) * ($watermark_width / $watermark_height)); $nh = $nw * ($watermark_height / $watermark_width); $r = sqrt(($imw * $imh * $percent) / ($watermark_width * $watermark_height)); if (!getOption('watermark_allow_upscale')) { $r = min(1, $r); } $nw = round($watermark_width * $r); $nh = round($watermark_height * $r); if (($nw != $watermark_width) || ($nh != $watermark_height)) { $watermark = zp_imageResizeAlpha($watermark, $nw, $nh); if (!$watermark) { imageError('404 Not Found', sprintf(gettext('Watermark %s not resizeable.'), $watermark_image), 'err-failimage.png'); } } // Position Overlay in Bottom Right $dest_x = max(0, floor(($imw - $nw) * $offset_w)); $dest_y = max(0, floor(($imh - $nh) * $offset_h)); if (DEBUG_IMAGE) debugLog("Watermark:" . basename($imgfile) . ": \$offset_h=$offset_h, \$offset_w=$offset_w, \$watermark_height=$watermark_height, \$watermark_width=$watermark_width, \$imw=$imw, \$imh=$imh, \$percent=$percent, \$r=$r, \$nw=$nw, \$nh=$nh, \$dest_x=$dest_x, \$dest_y=$dest_y"); if (!zp_copyCanvas($newim, $watermark, $dest_x, $dest_y, 0, 0, $nw, $nh)) { imageError('404 Not Found', sprintf(gettext('Image %s not renderable (copycanvas).'), filesystemToInternal($imgfile)), 'err-failimage.png'); } zp_imageKill($watermark); }
// Create the cached file (with lots of compatibility)... @chmod($newfile, 0777); if (zp_imageOutput($newim, getSuffix($newfile), $newfile, $quality)) { // successful save of cached image if (getOption('ImbedIPTC') && getSuffix($newfilename) == 'jpg' && GRAPHICS_LIBRARY != 'Imagick') { // the imbed function works only with JPEG images global $_zp_extra_filetypes; // because we are doing the require in a function! if (!$_zp_extra_filetypes) $_zp_extra_filetypes = array(); require_once(dirname(__FILE__) . '/functions.php'); // it is ok to increase memory footprint now since the image processing is complete $iptc = array( '1#090' => chr(0x1b) . chr(0x25) . chr(0x47), // character set is UTF-8 '2#115' => $_zp_gallery->getTitle() // source ); $iptc_data = zp_imageIPTC($imgfile); if ($iptc_data) { $iptc_data = iptcparse($iptc_data); if ($iptc_data) $iptc = array_merge($iptc_data, $iptc); } $imgfile = str_replace(ALBUM_FOLDER_SERVERPATH, '', $imgfile); $imagename = basename($imgfile); $albumname = dirname($imgfile); $image = newImage(newAlbum($albumname), $imagename); $copyright = $image->getCopyright(); if (empty($copyright)) { $copyright = getOption('default_copyright'); } if (!empty($copyright)) { $iptc['2#116'] = $copyright; } $credit = $image->getCredit(); if (!empty($credit)) { $iptc['2#110'] = $credit; } $iptc_result = ''; foreach ($iptc as $tag => $string) { $tag_parts = explode('#', $tag); if (is_array($string)) { foreach ($string as $element) { $iptc_result .= iptc_make_tag($tag_parts[0], $tag_parts[1], $element); } } else { $iptc_result .= iptc_make_tag($tag_parts[0], $tag_parts[1], $string); } } $content = iptcembed($iptc_result, $newfile); $fw = fopen($newfile, 'w'); fwrite($fw, $content); fclose($fw); clearstatcache(); } @chmod($newfile, FILE_MOD); if (DEBUG_IMAGE) debugLog('Finished:' . basename($imgfile)); } else { if (DEBUG_IMAGE) debugLog('cacheImage: failed to create ' . $newfile); imageError('404 Not Found', sprintf(gettext('cacheImage: failed to create %s'), $newfile), 'err-failimage.png'); } @chmod($newfile, FILE_MOD); zp_imageKill($newim); zp_imageKill($im); } catch (Exception $e) { debugLog('cacheImage(' . $newfilename . ') exception: ' . $e->getMessage()); imageError('404 Not Found', sprintf(gettext('cacheImage(%1$s) exception: %2$s'), $newfilename, $e->getMessage()), 'err-failimage.png'); return false; } clearstatcache(); return true; }
/* Determines the rotation of the image looking EXIF information. * * @param string $imgfile the image name * @return false when the image should not be rotated, or the degrees the * image should be rotated otherwise. * * PHP GD do not support flips so when a flip is needed we make a * rotation that get close to that flip. But I don't think any camera will * fill a flipped value in the tag. */
function getImageRotation($imgfile) { $imgfile = substr(filesystemToInternal($imgfile), strlen(ALBUM_FOLDER_SERVERPATH)); $result = query_single_row('SELECT EXIFOrientation FROM ' . prefix('images') . ' AS i JOIN ' . prefix('albums') . ' as a ON i.albumid = a.id WHERE ' . db_quote($imgfile) . ' = CONCAT(a.folder,"/",i.filename)'); if (is_array($result) && array_key_exists('EXIFOrientation', $result)) { $splits = preg_split('/!([(0-9)])/', $result['EXIFOrientation']); $rotation = $splits[0]; switch ($rotation) { case 1 : return false; // none case 2 : return false; // mirrored case 3 : return 180; // upside-down (not 180 but close) case 4 : return 180; // upside-down mirrored case 5 : return 270; // 90 CW mirrored (not 270 but close) case 6 : return 270; // 90 CCW case 7 : return 90; // 90 CCW mirrored (not 90 but close) case 8 : return 90; // 90 CW } } return false; } ?>
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