function out()
{
if (self::DEBUG) {
echo __FUNCTION__ . "\n";
}
$image = new \Gmagick();
$image->newimage($this->width, $this->height);
$image->drawimage($this->canvas);
$tmp = tempnam("", "gm");
$image->write($tmp);
return file_get_contents($tmp);
}
/**
* (non-PHPdoc)
* @see Imagine\ImagineInterface::create()
*/
public function create(BoxInterface $size, Color $color = null)
{
$width = $size->getWidth();
$height = $size->getHeight();
$color = null !== $color ? $color : new Color('fff');
$gmagick = new \Gmagick();
$pixel = new \GmagickPixel((string) $color);
if ($color->getAlpha() > 0) {
// TODO: implement support for transparent background
throw new RuntimeException('alpha transparency not implemented');
}
$gmagick->newimage($width, $height, $pixel->getcolor(false));
$gmagick->setimagecolorspace(\Gmagick::COLORSPACE_TRANSPARENT);
// this is needed to propagate transparency
$gmagick->setimagebackgroundcolor($pixel);
return new Image($gmagick);
}
/**
* {@inheritdoc}
*/
public function font($file, $size, ColorInterface $color)
{
$gmagick = new \Gmagick();
$gmagick->newimage(1, 1, 'transparent');
return new Font($gmagick, $file, $size, $color);
}
protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
{
// generate images
$img = imagecreatefrompng($file);
if ($img === false) {
return;
}
// FIXME The pixel transformation doesn't work well with 8bit PNGs
$eight_bit = ($byte & 4) !== 4;
$wpx = imagesx($img);
$hpx = imagesy($img);
imagesavealpha($img, false);
// create temp alpha file
$tempfile_alpha = tempnam($this->tmp, "cpdf_img_");
@unlink($tempfile_alpha);
$tempfile_alpha = "{$tempfile_alpha}.png";
// create temp plain file
$tempfile_plain = tempnam($this->tmp, "cpdf_img_");
@unlink($tempfile_plain);
$tempfile_plain = "{$tempfile_plain}.png";
$imgalpha = imagecreate($wpx, $hpx);
imagesavealpha($imgalpha, false);
// generate gray scale palette (0 -> 255)
for ($c = 0; $c < 256; ++$c) {
imagecolorallocate($imgalpha, $c, $c, $c);
}
// Use PECL gmagick + Graphics Magic to process transparent PNG images
if (extension_loaded("gmagick")) {
$gmagick = new Gmagick($file);
$gmagick->setimageformat('png');
// Get opacity channel (negative of alpha channel)
$alpha_channel_neg = clone $gmagick;
$alpha_channel_neg->separateimagechannel(Gmagick::CHANNEL_OPACITY);
// Negate opacity channel
$alpha_channel = new Gmagick();
$alpha_channel->newimage($wpx, $hpx, "#FFFFFF", "png");
$alpha_channel->compositeimage($alpha_channel_neg, Gmagick::COMPOSITE_DIFFERENCE, 0, 0);
$alpha_channel->separateimagechannel(Gmagick::CHANNEL_RED);
$alpha_channel->writeimage($tempfile_alpha);
// Cast to 8bit+palette
$imgalpha_ = imagecreatefrompng($tempfile_alpha);
imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($imgalpha_);
imagepng($imgalpha, $tempfile_alpha);
// Make opaque image
$color_channels = new Gmagick();
$color_channels->newimage($wpx, $hpx, "#FFFFFF", "png");
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYRED, 0, 0);
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYGREEN, 0, 0);
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYBLUE, 0, 0);
$color_channels->writeimage($tempfile_plain);
$imgplain = imagecreatefrompng($tempfile_plain);
} elseif (extension_loaded("imagick")) {
$imagick = new Imagick($file);
$imagick->setFormat('png');
// Get opacity channel (negative of alpha channel)
$alpha_channel = clone $imagick;
$alpha_channel->separateImageChannel(Imagick::CHANNEL_ALPHA);
$alpha_channel->negateImage(true);
$alpha_channel->writeImage($tempfile_alpha);
// Cast to 8bit+palette
$imgalpha_ = imagecreatefrompng($tempfile_alpha);
imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($imgalpha_);
imagepng($imgalpha, $tempfile_alpha);
// Make opaque image
$color_channels = new Imagick();
$color_channels->newImage($wpx, $hpx, "#FFFFFF", "png");
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYRED, 0, 0);
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYGREEN, 0, 0);
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYBLUE, 0, 0);
$color_channels->writeImage($tempfile_plain);
$imgplain = imagecreatefrompng($tempfile_plain);
} else {
// allocated colors cache
$allocated_colors = array();
// extract alpha channel
for ($xpx = 0; $xpx < $wpx; ++$xpx) {
for ($ypx = 0; $ypx < $hpx; ++$ypx) {
$color = imagecolorat($img, $xpx, $ypx);
$col = imagecolorsforindex($img, $color);
$alpha = $col['alpha'];
if ($eight_bit) {
// with gamma correction
$gammacorr = 2.2;
$pixel = pow((127 - $alpha) * 255 / 127 / 255, $gammacorr) * 255;
} else {
// without gamma correction
$pixel = (127 - $alpha) * 2;
$key = $col['red'] . $col['green'] . $col['blue'];
if (!isset($allocated_colors[$key])) {
$pixel_img = imagecolorallocate($img, $col['red'], $col['green'], $col['blue']);
$allocated_colors[$key] = $pixel_img;
} else {
$pixel_img = $allocated_colors[$key];
}
imagesetpixel($img, $xpx, $ypx, $pixel_img);
}
imagesetpixel($imgalpha, $xpx, $ypx, $pixel);
}
}
// extract image without alpha channel
$imgplain = imagecreatetruecolor($wpx, $hpx);
imagecopy($imgplain, $img, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($img);
imagepng($imgalpha, $tempfile_alpha);
imagepng($imgplain, $tempfile_plain);
}
// embed mask image
$this->addImagePng($tempfile_alpha, $x, $y, $w, $h, $imgalpha, true);
imagedestroy($imgalpha);
// embed image, masked with previously embedded mask
$this->addImagePng($tempfile_plain, $x, $y, $w, $h, $imgplain, false, true);
imagedestroy($imgplain);
// remove temp files
unlink($tempfile_alpha);
unlink($tempfile_plain);
}
/**
* Process an image.
*
* Returns an array of the $file, $results, $converted to tell us if an image changes formats, and the $original file if it did.
*
* @param string $file Full absolute path to the image file
* @param int $gallery_type 1=wordpress, 2=nextgen, 3=flagallery, 4=aux_images, 5=image editor, 6=imagestore
* @param boolean $converted tells us if this is a resize and the full image was converted to a new format
* @param boolean $new tells the optimizer that this is a new image, so it should attempt conversion regardless of previous results
* @param boolean $fullsize tells the optimizer this is a full size image
* @returns array
*/
function ewww_image_optimizer($file, $gallery_type = 4, $converted = false, $new = false, $fullsize = false)
{
ewwwio_debug_message('<b>' . __FUNCTION__ . '()</b>');
// if the plugin gets here without initializing, we need to run through some things first
if (!defined('EWWW_IMAGE_OPTIMIZER_CLOUD')) {
ewww_image_optimizer_cloud_init();
}
session_write_close();
$bypass_optimization = apply_filters('ewww_image_optimizer_bypass', false, $file);
if (true === $bypass_optimization) {
// tell the user optimization was skipped
$msg = __("Optimization skipped", EWWW_IMAGE_OPTIMIZER_DOMAIN);
ewwwio_debug_message("optimization bypassed: {$file}");
// send back the above message
return array(false, $msg, $converted, $file);
}
// initialize the original filename
$original = $file;
$result = '';
// check that the file exists
if (FALSE === file_exists($file)) {
// tell the user we couldn't find the file
$msg = sprintf(__('Could not find %s', EWWW_IMAGE_OPTIMIZER_DOMAIN), $file);
ewwwio_debug_message("file doesn't appear to exist: {$file}");
// send back the above message
return array(false, $msg, $converted, $original);
}
// check that the file is writable
if (FALSE === is_writable($file)) {
// tell the user we can't write to the file
$msg = sprintf(__('%s is not writable', EWWW_IMAGE_OPTIMIZER_DOMAIN), $file);
ewwwio_debug_message("couldn't write to the file {$file}");
// send back the above message
return array(false, $msg, $converted, $original);
}
if (function_exists('fileperms')) {
$file_perms = substr(sprintf('%o', fileperms($file)), -4);
}
$file_owner = 'unknown';
$file_group = 'unknown';
if (function_exists('posix_getpwuid')) {
$file_owner = posix_getpwuid(fileowner($file));
$file_owner = $file_owner['name'];
}
if (function_exists('posix_getgrgid')) {
$file_group = posix_getgrgid(filegroup($file));
$file_group = $file_group['name'];
}
ewwwio_debug_message("permissions: {$file_perms}, owner: {$file_owner}, group: {$file_group}");
$type = ewww_image_optimizer_mimetype($file, 'i');
if (strpos($type, 'image') === FALSE && strpos($type, 'pdf') === FALSE) {
ewwwio_debug_message('could not find any functions for mimetype detection');
//otherwise we store an error message since we couldn't get the mime-type
return array(false, __('Unknown type: ' . $type, EWWW_IMAGE_OPTIMIZER_DOMAIN), $converted, $original);
$msg = __('Missing finfo_file(), getimagesize() and mime_content_type() PHP functions', EWWW_IMAGE_OPTIMIZER_DOMAIN);
return array(false, $msg, $converted, $original);
}
if (!EWWW_IMAGE_OPTIMIZER_CLOUD) {
// check to see if 'nice' exists
$nice = ewww_image_optimizer_find_nix_binary('nice', 'n');
if (!defined('EWWW_IMAGE_OPTIMIZER_NOEXEC')) {
// Check if exec is disabled
if (ewww_image_optimizer_exec_check()) {
define('EWWW_IMAGE_OPTIMIZER_NOEXEC', true);
ewwwio_debug_message('exec seems to be disabled');
ewww_image_optimizer_disable_tools();
// otherwise, query the php settings for safe mode
} elseif (ewww_image_optimizer_safemode_check()) {
define('EWWW_IMAGE_OPTIMIZER_NOEXEC', true);
ewwwio_debug_message('safe mode appears to be enabled');
ewww_image_optimizer_disable_tools();
} else {
define('EWWW_IMAGE_OPTIMIZER_NOEXEC', false);
}
}
}
$skip = ewww_image_optimizer_skip_tools();
// if the user has disabled the utility checks
if (EWWW_IMAGE_OPTIMIZER_CLOUD) {
$skip['jpegtran'] = true;
$skip['optipng'] = true;
$skip['gifsicle'] = true;
$skip['pngout'] = true;
$skip['pngquant'] = true;
$skip['webp'] = true;
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_metadata_skip_full') && $fullsize) {
$keep_metadata = true;
} else {
$keep_metadata = false;
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_lossy_skip_full') && $fullsize) {
$skip_lossy = true;
} else {
$skip_lossy = false;
}
if (ini_get('max_execution_time') < 90 && ewww_image_optimizer_stl_check()) {
set_time_limit(0);
}
// if the full-size image was converted
if ($converted) {
ewwwio_debug_message('full-size image was converted, need to rebuild filename for meta');
$filenum = $converted;
// grab the file extension
preg_match('/\\.\\w+$/', $file, $fileext);
// strip the file extension
$filename = str_replace($fileext[0], '', $file);
// grab the dimensions
preg_match('/-\\d+x\\d+(-\\d+)*$/', $filename, $fileresize);
// strip the dimensions
$filename = str_replace($fileresize[0], '', $filename);
// reconstruct the filename with the same increment (stored in $converted) as the full version
$refile = $filename . '-' . $filenum . $fileresize[0] . $fileext[0];
// rename the file
rename($file, $refile);
ewwwio_debug_message("moved {$file} to {$refile}");
// and set $file to the new filename
$file = $refile;
$original = $file;
}
// get the original image size
$orig_size = filesize($file);
ewwwio_debug_message("original filesize: {$orig_size}");
if ($orig_size < ewww_image_optimizer_get_option('ewww_image_optimizer_skip_size')) {
// tell the user optimization was skipped
$msg = __("Optimization skipped", EWWW_IMAGE_OPTIMIZER_DOMAIN);
ewwwio_debug_message("optimization bypassed due to filesize: {$file}");
// send back the above message
return array(false, $msg, $converted, $file);
}
if ($type == 'image/png' && ewww_image_optimizer_get_option('ewww_image_optimizer_skip_png_size') && $orig_size > ewww_image_optimizer_get_option('ewww_image_optimizer_skip_png_size')) {
// tell the user optimization was skipped
$msg = __("Optimization skipped", EWWW_IMAGE_OPTIMIZER_DOMAIN);
ewwwio_debug_message("optimization bypassed due to filesize: {$file}");
// send back the above message
return array($file, $msg, $converted, $file);
}
// initialize $new_size with the original size, HOW ABOUT A ZERO...
//$new_size = $orig_size;
$new_size = 0;
// set the optimization process to OFF
$optimize = false;
// toggle the convert process to ON
$convert = true;
// allow other plugins to mangle the image however they like prior to optimization
do_action('ewww_image_optimizer_pre_optimization', $file, $type);
// run the appropriate optimization/conversion for the mime-type
switch ($type) {
case 'image/jpeg':
$png_size = 0;
// if jpg2png conversion is enabled, and this image is in the wordpress media library
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpg_to_png') && $gallery_type == 1 || !empty($_GET['ewww_convert'])) {
// generate the filename for a PNG
// if this is a resize version
if ($converted) {
// just change the file extension
$pngfile = preg_replace('/\\.\\w+$/', '.png', $file);
// if this is a full size image
} else {
// get a unique filename for the png image
list($pngfile, $filenum) = ewww_image_optimizer_unique_filename($file, '.png');
}
} else {
// otherwise, set it to OFF
$convert = false;
$pngfile = '';
}
// check for previous optimization, so long as the force flag is on and this isn't a new image that needs converting
if (empty($_REQUEST['ewww_force']) && !($new && $convert)) {
if ($results_msg = ewww_image_optimizer_check_table($file, $orig_size)) {
return array($file, $results_msg, $converted, $original);
}
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpg_level') > 10) {
list($file, $converted, $result, $new_size) = ewww_image_optimizer_cloud_optimizer($file, $type, $convert, $pngfile, 'image/png', $skip_lossy);
if ($converted) {
// check to see if the user wants the originals deleted
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original JPG
unlink($original);
}
$converted = $filenum;
ewww_image_optimizer_webp_create($file, $new_size, 'image/png', null, $orig_size != $new_size);
} else {
ewww_image_optimizer_webp_create($file, $new_size, $type, null, $orig_size != $new_size);
}
break;
}
if ($convert) {
$tools = ewww_image_optimizer_path_check(!$skip['jpegtran'], !$skip['optipng'], false, !$skip['pngout'], !$skip['pngquant'], !$skip['webp']);
} else {
$tools = ewww_image_optimizer_path_check(!$skip['jpegtran'], false, false, false, false, !$skip['webp']);
}
// if jpegtran optimization is disabled
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpg_level') == 0) {
// store an appropriate message in $result
$result = __('JPG optimization is disabled', EWWW_IMAGE_OPTIMIZER_DOMAIN);
// otherwise, if we aren't skipping the utility verification and jpegtran doesn't exist
} elseif (!$skip['jpegtran'] && !$tools['JPEGTRAN']) {
// store an appropriate message in $result
$result = sprintf(__('%s is missing', EWWW_IMAGE_OPTIMIZER_DOMAIN), '<em>jpegtran</em>');
// otherwise, things should be good, so...
} else {
// set the optimization process to ON
$optimize = true;
}
// if optimization is turned ON
if ($optimize) {
ewwwio_debug_message('attempting to optimize JPG...');
// generate temporary file-names:
$tempfile = $file . ".tmp";
//non-progressive jpeg
$progfile = $file . ".prog";
// progressive jpeg
// check to see if we are supposed to strip metadata (badly named)
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpegtran_copy') && !$keep_metadata) {
// don't copy metadata
$copy_opt = 'none';
} else {
// copy all the metadata
$copy_opt = 'all';
}
// run jpegtran - non-progressive
exec("{$nice} " . $tools['JPEGTRAN'] . " -copy {$copy_opt} -optimize -outfile " . ewww_image_optimizer_escapeshellarg($tempfile) . " " . ewww_image_optimizer_escapeshellarg($file));
// run jpegtran - progressive
exec("{$nice} " . $tools['JPEGTRAN'] . " -copy {$copy_opt} -optimize -progressive -outfile " . ewww_image_optimizer_escapeshellarg($progfile) . " " . ewww_image_optimizer_escapeshellarg($file));
// check the filesize of the non-progressive JPG
$non_size = ewww_image_optimizer_filesize($tempfile);
// check the filesize of the progressive JPG
$prog_size = ewww_image_optimizer_filesize($progfile);
ewwwio_debug_message("optimized JPG (non-progresive) size: {$non_size}");
ewwwio_debug_message("optimized JPG (progresive) size: {$prog_size}");
if ($non_size === false || $prog_size === false) {
$result = __('Unable to write file', EWWW_IMAGE_OPTIMIZER_DOMAIN);
$new_size = 0;
} elseif (!$non_size || !$prog_size) {
$result = __('Optimization failed', EWWW_IMAGE_OPTIMIZER_DOMAIN);
$new_size = 0;
} else {
// if the progressive file is bigger
if ($prog_size > $non_size) {
// store the size of the non-progessive JPG
$new_size = $non_size;
if (is_file($progfile)) {
// delete the progressive file
unlink($progfile);
}
// if the progressive file is smaller or the same
} else {
// store the size of the progressive JPG
$new_size = $prog_size;
// replace the non-progressive with the progressive file
rename($progfile, $tempfile);
}
}
ewwwio_debug_message("optimized JPG size: {$new_size}");
// if the best-optimized is smaller than the original JPG, and we didn't create an empty JPG
if ($orig_size > $new_size && $new_size != 0 && ewww_image_optimizer_mimetype($tempfile, 'i') == $type) {
// replace the original with the optimized file
rename($tempfile, $file);
// store the results of the optimization
$result = "{$orig_size} vs. {$new_size}";
// if the optimization didn't produce a smaller JPG
} else {
if (is_file($tempfile)) {
// delete the optimized file
unlink($tempfile);
}
// store the results
$result = 'unchanged';
$new_size = $orig_size;
}
// if conversion and optimization are both turned OFF, finish the JPG processing
} elseif (!$convert) {
ewww_image_optimizer_webp_create($file, $orig_size, $type, $tools['WEBP']);
break;
}
// if the conversion process is turned ON, or if this is a resize and the full-size was converted
if ($convert) {
ewwwio_debug_message("attempting to convert JPG to PNG: {$pngfile}");
if (empty($new_size)) {
$new_size = $orig_size;
}
// convert the JPG to PNG
if (ewww_image_optimizer_gmagick_support()) {
try {
$gmagick = new Gmagick($file);
$gmagick->stripimage();
$gmagick->setimageformat('PNG');
$gmagick->writeimage($pngfile);
} catch (Exception $gmagick_error) {
ewwwio_debug_message($gmagick_error->getMessage());
}
$png_size = ewww_image_optimizer_filesize($pngfile);
}
if (!$png_size && ewww_image_optimizer_imagick_support()) {
try {
$imagick = new Imagick($file);
$imagick->stripImage();
$imagick->setImageFormat('PNG');
$imagick->writeImage($pngfile);
} catch (Exception $imagick_error) {
ewwwio_debug_message($imagick_error->getMessage());
}
$png_size = ewww_image_optimizer_filesize($pngfile);
}
if (!$png_size) {
$convert_path = '';
// retrieve version info for ImageMagick
if (PHP_OS != 'WINNT') {
$convert_path = ewww_image_optimizer_find_nix_binary('convert', 'i');
} elseif (PHP_OS == 'WINNT') {
$convert_path = ewww_image_optimizer_find_win_binary('convert', 'i');
}
if (!empty($convert_path)) {
ewwwio_debug_message('converting with ImageMagick');
exec($convert_path . " " . ewww_image_optimizer_escapeshellarg($file) . " -strip " . ewww_image_optimizer_escapeshellarg($pngfile));
$png_size = ewww_image_optimizer_filesize($pngfile);
}
}
if (!$png_size && ewww_image_optimizer_gd_support()) {
ewwwio_debug_message('converting with GD');
imagepng(imagecreatefromjpeg($file), $pngfile);
$png_size = ewww_image_optimizer_filesize($pngfile);
}
// if lossy optimization is ON and full-size exclusion is not active
if (ewww_image_optimizer_get_option('ewww_image_optimizer_png_level') == 40 && $tools['PNGQUANT'] && !$skip_lossy) {
ewwwio_debug_message('attempting lossy reduction');
exec("{$nice} " . $tools['PNGQUANT'] . " " . ewww_image_optimizer_escapeshellarg($pngfile));
$quantfile = preg_replace('/\\.\\w+$/', '-fs8.png', $pngfile);
if (is_file($quantfile) && filesize($pngfile) > filesize($quantfile)) {
ewwwio_debug_message("lossy reduction is better: original - " . filesize($pngfile) . " vs. lossy - " . filesize($quantfile));
rename($quantfile, $pngfile);
} elseif (is_file($quantfile)) {
ewwwio_debug_message("lossy reduction is worse: original - " . filesize($pngfile) . " vs. lossy - " . filesize($quantfile));
unlink($quantfile);
} else {
ewwwio_debug_message('pngquant did not produce any output');
}
}
// if optipng isn't disabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_optipng')) {
// retrieve the optipng optimization level
$optipng_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_optipng_level');
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpegtran_copy') && preg_match('/0.7/', ewww_image_optimizer_tool_found($tools['OPTIPNG'], 'o')) && !$keep_metadata) {
$strip = '-strip all ';
} else {
$strip = '';
}
// if the PNG file was created
if (file_exists($pngfile)) {
ewwwio_debug_message('optimizing converted PNG with optipng');
// run optipng on the new PNG
exec("{$nice} " . $tools['OPTIPNG'] . " -o{$optipng_level} -quiet {$strip} " . ewww_image_optimizer_escapeshellarg($pngfile));
}
}
// if pngout isn't disabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_pngout')) {
// retrieve the pngout optimization level
$pngout_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_pngout_level');
// if the PNG file was created
if (file_exists($pngfile)) {
ewwwio_debug_message('optimizing converted PNG with pngout');
// run pngout on the new PNG
exec("{$nice} " . $tools['PNGOUT'] . " -s{$pngout_level} -q " . ewww_image_optimizer_escapeshellarg($pngfile));
}
}
$png_size = ewww_image_optimizer_filesize($pngfile);
ewwwio_debug_message("converted PNG size: {$png_size}");
// if the PNG is smaller than the original JPG, and we didn't end up with an empty file
if ($new_size > $png_size && $png_size != 0 && ewww_image_optimizer_mimetype($pngfile, 'i') == 'image/png') {
ewwwio_debug_message("converted PNG is better: {$png_size} vs. {$new_size}");
// store the size of the converted PNG
$new_size = $png_size;
// check to see if the user wants the originals deleted
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original JPG
unlink($file);
}
// store the location of the PNG file
$file = $pngfile;
// let webp know what we're dealing with now
$type = 'image/png';
// successful conversion and we store the increment
$converted = $filenum;
} else {
ewwwio_debug_message('converted PNG is no good');
// otherwise delete the PNG
$converted = FALSE;
if (is_file($pngfile)) {
unlink($pngfile);
}
}
}
ewww_image_optimizer_webp_create($file, $new_size, $type, $tools['WEBP'], $orig_size != $new_size);
break;
case 'image/png':
$jpg_size = 0;
// png2jpg conversion is turned on, and the image is in the wordpress media library
if ((ewww_image_optimizer_get_option('ewww_image_optimizer_png_to_jpg') || !empty($_GET['ewww_convert'])) && $gallery_type == 1 && !$skip_lossy && (!ewww_image_optimizer_png_alpha($file) || ewww_image_optimizer_jpg_background())) {
ewwwio_debug_message('PNG to JPG conversion turned on');
// if the user set a fill background for transparency
$background = '';
if ($background = ewww_image_optimizer_jpg_background()) {
// set background color for GD
$r = hexdec('0x' . strtoupper(substr($background, 0, 2)));
$g = hexdec('0x' . strtoupper(substr($background, 2, 2)));
$b = hexdec('0x' . strtoupper(substr($background, 4, 2)));
// set the background flag for 'convert'
$background = "-background " . '"' . "#{$background}" . '"';
} else {
$r = '';
$g = '';
$b = '';
}
// if the user manually set the JPG quality
if ($quality = ewww_image_optimizer_jpg_quality()) {
// set the quality for GD
$gquality = $quality;
// set the quality flag for 'convert'
$cquality = "-quality {$quality}";
} else {
$cquality = '';
$gquality = '92';
}
// if this is a resize version
if ($converted) {
// just replace the file extension with a .jpg
$jpgfile = preg_replace('/\\.\\w+$/', '.jpg', $file);
// if this is a full version
} else {
// construct the filename for the new JPG
list($jpgfile, $filenum) = ewww_image_optimizer_unique_filename($file, '.jpg');
}
} else {
ewwwio_debug_message('PNG to JPG conversion turned off');
// turn the conversion process OFF
$convert = false;
$jpgfile = '';
$r = null;
$g = null;
$b = null;
$gquality = null;
}
// check for previous optimization, so long as the force flag is on and this isn't a new image that needs converting
if (empty($_REQUEST['ewww_force']) && !($new && $convert)) {
if ($results_msg = ewww_image_optimizer_check_table($file, $orig_size)) {
return array($file, $results_msg, $converted, $original);
}
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_png_level') >= 20 && ewww_image_optimizer_get_option('ewww_image_optimizer_cloud_key')) {
list($file, $converted, $result, $new_size) = ewww_image_optimizer_cloud_optimizer($file, $type, $convert, $jpgfile, 'image/jpeg', $skip_lossy, array('r' => $r, 'g' => $g, 'b' => $b, 'quality' => $gquality));
if ($converted) {
// check to see if the user wants the originals deleted
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original JPG
unlink($original);
}
$converted = $filenum;
ewww_image_optimizer_webp_create($file, $new_size, 'image/jpeg', null, $orig_size != $new_size);
} else {
ewww_image_optimizer_webp_create($file, $new_size, $type, null, $orig_size != $new_size);
}
break;
}
if ($convert) {
$tools = ewww_image_optimizer_path_check(!$skip['jpegtran'], !$skip['optipng'], false, !$skip['pngout'], !$skip['pngquant'], !$skip['webp']);
} else {
$tools = ewww_image_optimizer_path_check(false, !$skip['optipng'], false, !$skip['pngout'], !$skip['pngquant'], !$skip['webp']);
}
// if pngout and optipng are disabled
if (ewww_image_optimizer_get_option('ewww_image_optimizer_disable_optipng') && ewww_image_optimizer_get_option('ewww_image_optimizer_disable_pngout') || ewww_image_optimizer_get_option('ewww_image_optimizer_png_level') == 0) {
// tell the user all PNG tools are disabled
$result = __('PNG optimization is disabled', EWWW_IMAGE_OPTIMIZER_DOMAIN);
// if the utility checking is on, optipng is enabled, but optipng cannot be found
} elseif (!$skip['optipng'] && !$tools['OPTIPNG']) {
// tell the user optipng is missing
$result = sprintf(__('%s is missing', EWWW_IMAGE_OPTIMIZER_DOMAIN), '<em>optipng</em>');
// if the utility checking is on, pngout is enabled, but pngout cannot be found
} elseif (!$skip['pngout'] && !$tools['PNGOUT']) {
// tell the user pngout is missing
$result = sprintf(__('%s is missing', EWWW_IMAGE_OPTIMIZER_DOMAIN), '<em>pngout</em>');
} else {
// turn optimization on if we made it through all the checks
$optimize = true;
}
// if optimization is turned on
if ($optimize) {
// if lossy optimization is ON and full-size exclusion is not active
if (ewww_image_optimizer_get_option('ewww_image_optimizer_png_level') == 40 && $tools['PNGQUANT'] && !$skip_lossy) {
ewwwio_debug_message('attempting lossy reduction');
exec("{$nice} " . $tools['PNGQUANT'] . " " . ewww_image_optimizer_escapeshellarg($file));
$quantfile = preg_replace('/\\.\\w+$/', '-fs8.png', $file);
if (is_file($quantfile) && filesize($file) > filesize($quantfile) && ewww_image_optimizer_mimetype($quantfile, 'i') == $type) {
ewwwio_debug_message("lossy reduction is better: original - " . filesize($file) . " vs. lossy - " . filesize($quantfile));
rename($quantfile, $file);
} elseif (is_file($quantfile)) {
ewwwio_debug_message("lossy reduction is worse: original - " . filesize($file) . " vs. lossy - " . filesize($quantfile));
unlink($quantfile);
} else {
ewwwio_debug_message('pngquant did not produce any output');
}
}
$tempfile = $file . '.tmp.png';
copy($file, $tempfile);
// if optipng is enabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_optipng')) {
// retrieve the optimization level for optipng
$optipng_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_optipng_level');
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpegtran_copy') && preg_match('/0.7/', ewww_image_optimizer_tool_found($tools['OPTIPNG'], 'o')) && !$keep_metadata) {
$strip = '-strip all ';
} else {
$strip = '';
}
// run optipng on the PNG file
exec("{$nice} " . $tools['OPTIPNG'] . " -o{$optipng_level} -quiet {$strip} " . ewww_image_optimizer_escapeshellarg($tempfile));
}
// if pngout is enabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_pngout')) {
// retrieve the optimization level for pngout
$pngout_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_pngout_level');
// run pngout on the PNG file
exec("{$nice} " . $tools['PNGOUT'] . " -s{$pngout_level} -q " . ewww_image_optimizer_escapeshellarg($tempfile));
}
// retrieve the filesize of the temporary PNG
$new_size = ewww_image_optimizer_filesize($tempfile);
// if the new PNG is smaller
if ($orig_size > $new_size && $new_size != 0 && ewww_image_optimizer_mimetype($tempfile, 'i') == $type) {
// replace the original with the optimized file
rename($tempfile, $file);
// store the results of the optimization
$result = "{$orig_size} vs. {$new_size}";
// if the optimization didn't produce a smaller PNG
} else {
if (is_file($tempfile)) {
// delete the optimized file
unlink($tempfile);
}
// store the results
$result = 'unchanged';
$new_size = $orig_size;
}
// if conversion and optimization are both disabled we are done here
} elseif (!$convert) {
ewwwio_debug_message('calling webp, but neither convert or optimize');
ewww_image_optimizer_webp_create($file, $orig_size, $type, $tools['WEBP']);
break;
}
// retrieve the new filesize of the PNG
$new_size = ewww_image_optimizer_filesize($file);
// if conversion is on and the PNG doesn't have transparency or the user set a background color to replace transparency
//if ( $convert && ( ! ewww_image_optimizer_png_alpha( $file ) || ewww_image_optimizer_jpg_background() ) ) {
if ($convert) {
ewwwio_debug_message("attempting to convert PNG to JPG: {$jpgfile}");
if (empty($new_size)) {
$new_size = $orig_size;
}
$magick_background = ewww_image_optimizer_jpg_background();
if (empty($magick_background)) {
$magick_background = '000000';
}
// convert the PNG to a JPG with all the proper options
if (ewww_image_optimizer_gmagick_support()) {
try {
if (ewww_image_optimizer_png_alpha($file)) {
$gmagick_overlay = new Gmagick($file);
$gmagick = new Gmagick();
$gmagick->newimage($gmagick_overlay->getimagewidth(), $gmagick_overlay->getimageheight(), '#' . $magick_background);
$gmagick->compositeimage($gmagick_overlay, 1, 0, 0);
} else {
$gmagick = new Gmagick($file);
}
$gmagick->setimageformat('JPG');
$gmagick->setcompressionquality($gquality);
$gmagick->writeimage($jpgfile);
} catch (Exception $gmagick_error) {
ewwwio_debug_message($gmagick_error->getMessage());
}
$jpg_size = ewww_image_optimizer_filesize($jpgfile);
}
if (!$jpg_size && ewww_image_optimizer_imagick_support()) {
try {
$imagick = new Imagick($file);
if (ewww_image_optimizer_png_alpha($file)) {
$imagick->setImageBackgroundColor(new ImagickPixel('#' . $magick_background));
$imagick->setImageAlphaChannel(11);
}
$imagick->setImageFormat('JPG');
$imagick->setCompressionQuality($gquality);
$imagick->writeImage($jpgfile);
} catch (Exception $imagick_error) {
ewwwio_debug_message($imagick_error->getMessage());
}
$jpg_size = ewww_image_optimizer_filesize($jpgfile);
}
if (!$jpg_size) {
// retrieve version info for ImageMagick
$convert_path = ewww_image_optimizer_find_nix_binary('convert', 'i');
if (!empty($convert_path)) {
ewwwio_debug_message('converting with ImageMagick');
ewwwio_debug_message("using command: {$convert_path} {$background} -alpha remove {$cquality} {$file} {$jpgfile}");
exec("{$convert_path} {$background} -alpha remove {$cquality} " . ewww_image_optimizer_escapeshellarg($file) . " " . ewww_image_optimizer_escapeshellarg($jpgfile));
$jpg_size = ewww_image_optimizer_filesize($jpgfile);
}
}
if (!$jpg_size && ewww_image_optimizer_gd_support()) {
ewwwio_debug_message('converting with GD');
// retrieve the data from the PNG
$input = imagecreatefrompng($file);
// retrieve the dimensions of the PNG
list($width, $height) = getimagesize($file);
// create a new image with those dimensions
$output = imagecreatetruecolor($width, $height);
if ($r === '') {
$r = 255;
$g = 255;
$b = 255;
}
// allocate the background color
$rgb = imagecolorallocate($output, $r, $g, $b);
// fill the new image with the background color
imagefilledrectangle($output, 0, 0, $width, $height, $rgb);
// copy the original image to the new image
imagecopy($output, $input, 0, 0, 0, 0, $width, $height);
// output the JPG with the quality setting
imagejpeg($output, $jpgfile, $gquality);
}
$jpg_size = ewww_image_optimizer_filesize($jpgfile);
if ($jpg_size) {
ewwwio_debug_message("converted JPG filesize: {$jpg_size}");
} else {
ewwwio_debug_message('unable to convert to JPG');
}
// next we need to optimize that JPG if jpegtran is enabled
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpg_level') == 10 && file_exists($jpgfile)) {
// generate temporary file-names:
$tempfile = $jpgfile . ".tmp";
//non-progressive jpeg
$progfile = $jpgfile . ".prog";
// progressive jpeg
// check to see if we are supposed to strip metadata (badly named)
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpegtran_copy') && !$keep_metadata) {
// don't copy metadata
$copy_opt = 'none';
} else {
// copy all the metadata
$copy_opt = 'all';
}
// run jpegtran - non-progressive
exec("{$nice} " . $tools['JPEGTRAN'] . " -copy {$copy_opt} -optimize -outfile " . ewww_image_optimizer_escapeshellarg($tempfile) . " " . ewww_image_optimizer_escapeshellarg($jpgfile));
// run jpegtran - progressive
exec("{$nice} " . $tools['JPEGTRAN'] . " -copy {$copy_opt} -optimize -progressive -outfile " . ewww_image_optimizer_escapeshellarg($progfile) . " " . ewww_image_optimizer_escapeshellarg($jpgfile));
// check the filesize of the non-progressive JPG
$non_size = ewww_image_optimizer_filesize($tempfile);
ewwwio_debug_message("non-progressive JPG filesize: {$non_size}");
// check the filesize of the progressive JPG
$prog_size = ewww_image_optimizer_filesize($progfile);
ewwwio_debug_message("progressive JPG filesize: {$prog_size}");
// if the progressive file is bigger
if ($prog_size > $non_size) {
// store the size of the non-progessive JPG
$opt_jpg_size = $non_size;
if (is_file($progfile)) {
// delete the progressive file
unlink($progfile);
}
ewwwio_debug_message('keeping non-progressive JPG');
// if the progressive file is smaller or the same
} else {
// store the size of the progressive JPG
$opt_jpg_size = $prog_size;
// replace the non-progressive with the progressive file
rename($progfile, $tempfile);
ewwwio_debug_message('keeping progressive JPG');
}
// if the best-optimized is smaller than the original JPG, and we didn't create an empty JPG
if ($jpg_size > $opt_jpg_size && $opt_jpg_size != 0) {
// replace the original with the optimized file
rename($tempfile, $jpgfile);
// store the size of the optimized JPG
$jpg_size = $opt_jpg_size;
ewwwio_debug_message('optimized JPG was smaller than un-optimized version');
// if the optimization didn't produce a smaller JPG
} elseif (is_file($tempfile)) {
// delete the optimized file
unlink($tempfile);
}
}
ewwwio_debug_message("converted JPG size: {$jpg_size}");
// if the new JPG is smaller than the original PNG
if ($new_size > $jpg_size && $jpg_size != 0 && ewww_image_optimizer_mimetype($jpgfile, 'i') == 'image/jpeg') {
// store the size of the JPG as the new filesize
$new_size = $jpg_size;
// if the user wants originals delted after a conversion
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original PNG
unlink($file);
}
// update the $file location to the new JPG
$file = $jpgfile;
// let webp know what we're dealing with now
$type = 'image/jpeg';
// successful conversion, so we store the increment
$converted = $filenum;
} else {
$converted = FALSE;
if (is_file($jpgfile)) {
// otherwise delete the new JPG
unlink($jpgfile);
}
}
}
ewww_image_optimizer_webp_create($file, $new_size, $type, $tools['WEBP'], $orig_size != $new_size);
break;
case 'image/gif':
// if gif2png is turned on, and the image is in the wordpress media library
if ((ewww_image_optimizer_get_option('ewww_image_optimizer_gif_to_png') || !empty($_GET['ewww_convert'])) && $gallery_type == 1 && !ewww_image_optimizer_is_animated($file)) {
// generate the filename for a PNG
// if this is a resize version
if ($converted) {
// just change the file extension
$pngfile = preg_replace('/\\.\\w+$/', '.png', $file);
// if this is the full version
} else {
// construct the filename for the new PNG
list($pngfile, $filenum) = ewww_image_optimizer_unique_filename($file, '.png');
}
} else {
// turn conversion OFF
$convert = false;
$pngfile = '';
}
// check for previous optimization, so long as the force flag is on and this isn't a new image that needs converting
if (empty($_REQUEST['ewww_force']) && !($new && $convert)) {
if ($results_msg = ewww_image_optimizer_check_table($file, $orig_size)) {
return array($file, $results_msg, $converted, $original);
}
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_cloud_key') && ewww_image_optimizer_get_option('ewww_image_optimizer_gif_level') == 10) {
list($file, $converted, $result, $new_size) = ewww_image_optimizer_cloud_optimizer($file, $type, $convert, $pngfile, 'image/png', $skip_lossy);
if ($converted) {
// check to see if the user wants the originals deleted
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original JPG
unlink($original);
}
$converted = $filenum;
ewww_image_optimizer_webp_create($file, $new_size, 'image/png', null, $orig_size != $new_size);
}
break;
}
if ($convert) {
$tools = ewww_image_optimizer_path_check(false, !$skip['optipng'], !$skip['gifsicle'], !$skip['pngout'], !$skip['pngquant'], !$skip['webp']);
} else {
$tools = ewww_image_optimizer_path_check(false, false, !$skip['gifsicle'], false, false, false);
}
// if gifsicle is disabled
if (ewww_image_optimizer_get_option('ewww_image_optimizer_gif_level') == 0) {
// return an appropriate message
$result = __('GIF optimization is disabled', EWWW_IMAGE_OPTIMIZER_DOMAIN);
// if utility checking is on, and gifsicle is not installed
} elseif (!$skip['gifsicle'] && !$tools['GIFSICLE']) {
// return an appropriate message
$result = sprintf(__('%s is missing', EWWW_IMAGE_OPTIMIZER_DOMAIN), '<em>gifsicle</em>');
} else {
// otherwise, turn optimization ON
$optimize = true;
}
// if optimization is turned ON
if ($optimize) {
$tempfile = $file . '.tmp';
//temporary GIF output
// run gifsicle on the GIF
exec("{$nice} " . $tools['GIFSICLE'] . " -O3 --careful -o {$tempfile} " . ewww_image_optimizer_escapeshellarg($file));
// retrieve the filesize of the temporary GIF
$new_size = ewww_image_optimizer_filesize($tempfile);
// if the new GIF is smaller
if ($orig_size > $new_size && $new_size != 0 && ewww_image_optimizer_mimetype($tempfile, 'i') == $type) {
// replace the original with the optimized file
rename($tempfile, $file);
// store the results of the optimization
$result = "{$orig_size} vs. {$new_size}";
// if the optimization didn't produce a smaller GIF
} else {
if (is_file($tempfile)) {
// delete the optimized file
unlink($tempfile);
}
// store the results
$result = 'unchanged';
$new_size = $orig_size;
}
// if conversion and optimization are both turned OFF, we are done here
} elseif (!$convert) {
break;
}
// get the new filesize for the GIF
$new_size = ewww_image_optimizer_filesize($file);
// if conversion is ON and the GIF isn't animated
if ($convert && !ewww_image_optimizer_is_animated($file)) {
if (empty($new_size)) {
$new_size = $orig_size;
}
// if optipng is enabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_optipng') && $tools['OPTIPNG']) {
// retrieve the optipng optimization level
$optipng_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_optipng_level');
if (ewww_image_optimizer_get_option('ewww_image_optimizer_jpegtran_copy') && preg_match('/0.7/', ewww_image_optimizer_tool_found($tools['OPTIPNG'], 'o')) && !$keep_metadata) {
$strip = '-strip all ';
} else {
$strip = '';
}
// run optipng on the GIF file
exec("{$nice} " . $tools['OPTIPNG'] . " -out " . ewww_image_optimizer_escapeshellarg($pngfile) . " -o{$optipng_level} -quiet {$strip} " . ewww_image_optimizer_escapeshellarg($file));
}
// if pngout is enabled
if (!ewww_image_optimizer_get_option('ewww_image_optimizer_disable_pngout') && $tools['PNGOUT']) {
// retrieve the pngout optimization level
$pngout_level = (int) ewww_image_optimizer_get_option('ewww_image_optimizer_pngout_level');
// if $pngfile exists (which means optipng was run already)
if (file_exists($pngfile)) {
// run pngout on the PNG file
exec("{$nice} " . $tools['PNGOUT'] . " -s{$pngout_level} -q " . ewww_image_optimizer_escapeshellarg($pngfile));
} else {
// run pngout on the GIF file
exec("{$nice} " . $tools['PNGOUT'] . " -s{$pngout_level} -q " . ewww_image_optimizer_escapeshellarg($file) . " " . ewww_image_optimizer_escapeshellarg($pngfile));
}
}
// retrieve the filesize of the PNG
$png_size = ewww_image_optimizer_filesize($pngfile);
// if the new PNG is smaller than the original GIF
if ($new_size > $png_size && $png_size != 0 && ewww_image_optimizer_mimetype($pngfile, 'i') == 'image/png') {
// store the PNG size as the new filesize
$new_size = $png_size;
// if the user wants original GIFs deleted after successful conversion
if (ewww_image_optimizer_get_option('ewww_image_optimizer_delete_originals') == TRUE) {
// delete the original GIF
unlink($file);
}
// update the $file location with the new PNG
$file = $pngfile;
// let webp know what we're dealing with now
$type = 'image/png';
// normally this would be at the end of the section, but we only want to do webp if the image was successfully converted to a png
ewww_image_optimizer_webp_create($file, $new_size, $type, $tools['WEBP'], $orig_size != $new_size);
// successful conversion (for now), so we store the increment
$converted = $filenum;
} else {
$converted = FALSE;
if (is_file($pngfile)) {
unlink($pngfile);
}
}
}
break;
case 'application/pdf':
if (empty($_REQUEST['ewww_force'])) {
if ($results_msg = ewww_image_optimizer_check_table($file, $orig_size)) {
return array($file, $results_msg, false, $original);
}
}
if (ewww_image_optimizer_get_option('ewww_image_optimizer_pdf_level') > 0) {
list($file, $converted, $result, $new_size) = ewww_image_optimizer_cloud_optimizer($file, $type);
}
break;
default:
// if not a JPG, PNG, or GIF, tell the user we don't work with strangers
return array($file, __('Unknown type: ' . $type, EWWW_IMAGE_OPTIMIZER_DOMAIN), $converted, $original);
}
// allow other plugins to run operations on the images after optimization.
// NOTE: it is recommended to do any image modifications prior to optimization, otherwise you risk un-optimizing your images here.
do_action('ewww_image_optimizer_post_optimization', $file, $type);
// if their cloud api license limit has been exceeded
if ($result == 'exceeded') {
return array($file, __('License exceeded', EWWW_IMAGE_OPTIMIZER_DOMAIN), $converted, $original);
}
if (!empty($new_size)) {
// Set correct file permissions
$stat = stat(dirname($file));
$perms = $stat['mode'] & 0666;
//same permissions as parent folder, strip off the executable bits
@chmod($file, $perms);
$results_msg = ewww_image_optimizer_update_table($file, $new_size, $orig_size, $new);
ewwwio_memory(__FUNCTION__);
return array($file, $results_msg, $converted, $original);
}
ewwwio_memory(__FUNCTION__);
// otherwise, send back the filename, the results (some sort of error message), the $converted flag, and the name of the original image
return array($file, $result, $converted, $original);
}
protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
{
$img = imagecreatefrompng($file);
if ($img === false) {
return;
}
$eight_bit = ($byte & 4) !== 4;
$wpx = imagesx($img);
$hpx = imagesy($img);
imagesavealpha($img, false);
$tempfile_alpha = tempnam($this->tmp, "cpdf_img_");
@unlink($tempfile_alpha);
$tempfile_alpha = "{$tempfile_alpha}.png";
$tempfile_plain = tempnam($this->tmp, "cpdf_img_");
@unlink($tempfile_plain);
$tempfile_plain = "{$tempfile_plain}.png";
$imgalpha = imagecreate($wpx, $hpx);
imagesavealpha($imgalpha, false);
for ($c = 0; $c < 256; ++$c) {
imagecolorallocate($imgalpha, $c, $c, $c);
}
if (extension_loaded("gmagick")) {
$gmagick = new Gmagick($file);
$gmagick->setimageformat('png');
$alpha_channel_neg = clone $gmagick;
$alpha_channel_neg->separateimagechannel(Gmagick::CHANNEL_OPACITY);
$alpha_channel = new Gmagick();
$alpha_channel->newimage($wpx, $hpx, "#FFFFFF", "png");
$alpha_channel->compositeimage($alpha_channel_neg, Gmagick::COMPOSITE_DIFFERENCE, 0, 0);
$alpha_channel->separateimagechannel(Gmagick::CHANNEL_RED);
$alpha_channel->writeimage($tempfile_alpha);
$imgalpha_ = imagecreatefrompng($tempfile_alpha);
imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($imgalpha_);
imagepng($imgalpha, $tempfile_alpha);
$color_channels = new Gmagick();
$color_channels->newimage($wpx, $hpx, "#FFFFFF", "png");
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYRED, 0, 0);
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYGREEN, 0, 0);
$color_channels->compositeimage($gmagick, Gmagick::COMPOSITE_COPYBLUE, 0, 0);
$color_channels->writeimage($tempfile_plain);
$imgplain = imagecreatefrompng($tempfile_plain);
} elseif (extension_loaded("imagick")) {
$imagick = new Imagick($file);
$imagick->setFormat('png');
$alpha_channel = clone $imagick;
$alpha_channel->separateImageChannel(Imagick::CHANNEL_ALPHA);
$alpha_channel->negateImage(true);
$alpha_channel->writeImage($tempfile_alpha);
$imgalpha_ = imagecreatefrompng($tempfile_alpha);
imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($imgalpha_);
imagepng($imgalpha, $tempfile_alpha);
$color_channels = new Imagick();
$color_channels->newImage($wpx, $hpx, "#FFFFFF", "png");
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYRED, 0, 0);
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYGREEN, 0, 0);
$color_channels->compositeImage($imagick, Imagick::COMPOSITE_COPYBLUE, 0, 0);
$color_channels->writeImage($tempfile_plain);
$imgplain = imagecreatefrompng($tempfile_plain);
} else {
$allocated_colors = array();
for ($xpx = 0; $xpx < $wpx; ++$xpx) {
for ($ypx = 0; $ypx < $hpx; ++$ypx) {
$color = imagecolorat($img, $xpx, $ypx);
$col = imagecolorsforindex($img, $color);
$alpha = $col['alpha'];
if ($eight_bit) {
$gammacorr = 2.2;
$pixel = pow((127 - $alpha) * 255 / 127 / 255, $gammacorr) * 255;
} else {
$pixel = (127 - $alpha) * 2;
$key = $col['red'] . $col['green'] . $col['blue'];
if (!isset($allocated_colors[$key])) {
$pixel_img = imagecolorallocate($img, $col['red'], $col['green'], $col['blue']);
$allocated_colors[$key] = $pixel_img;
} else {
$pixel_img = $allocated_colors[$key];
}
imagesetpixel($img, $xpx, $ypx, $pixel_img);
}
imagesetpixel($imgalpha, $xpx, $ypx, $pixel);
}
}
$imgplain = imagecreatetruecolor($wpx, $hpx);
imagecopy($imgplain, $img, 0, 0, 0, 0, $wpx, $hpx);
imagedestroy($img);
imagepng($imgalpha, $tempfile_alpha);
imagepng($imgplain, $tempfile_plain);
}
$this->addImagePng($tempfile_alpha, $x, $y, $w, $h, $imgalpha, true);
imagedestroy($imgalpha);
$this->addImagePng($tempfile_plain, $x, $y, $w, $h, $imgplain, false, true);
imagedestroy($imgplain);
unlink($tempfile_alpha);
unlink($tempfile_plain);
}