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<?php
function image_get_available_toolkits() {
$toolkits = file_scan_directory('includes', 'image\\..*\\.inc$');
$output = array();
foreach ($toolkits as $file => $toolkit) {
include_once "./{$file}";
$function = str_replace('.', '_', $toolkit->name) . '_info';
if (function_exists($function)) {
$info = $function();
$output[$info['name']] = $info['title'];
}
}
$output['gd'] = t('Built-in GD2 toolkit');
return $output;
}
function image_get_toolkit() {
static $toolkit;
if (!$toolkit) {
$toolkit = variable_get('image_toolkit', 'gd');
$toolkit_file = './includes/image.' . $toolkit . '.inc';
if ($toolkit != 'gd' && file_exists($toolkit_file)) {
include_once $toolkit_file;
}
elseif (!image_gd_check_settings()) {
$toolkit = FALSE;
}
}
return $toolkit;
}
function image_toolkit_invoke($method, $params = array()) {
if ($toolkit = image_get_toolkit()) {
$function = 'image_' . $toolkit . '_' . $method;
if (function_exists($function)) {
return call_user_func_array($function, $params);
}
else {
watchdog('php', t("The selected image handling toolkit %toolkit can not correctly process %function.", array(
'%toolkit' => $toolkit,
'%function' => $function,
)), WATCHDOG_ERROR);
return FALSE;
}
}
else {
if ($method == 'settings') {
return image_gd_settings();
}
}
}
function image_get_info($file) {
if (!is_file($file)) {
return FALSE;
}
$details = FALSE;
$data = @getimagesize($file);
$file_size = @filesize($file);
if (isset($data) && is_array($data)) {
$extensions = array(
'1' => 'gif',
'2' => 'jpg',
'3' => 'png',
);
$extension = array_key_exists($data[2], $extensions) ? $extensions[$data[2]] : '';
$details = array(
'width' => $data[0],
'height' => $data[1],
'extension' => $extension,
'file_size' => $file_size,
'mime_type' => $data['mime'],
);
}
return $details;
}
function image_scale($source, $destination, $width, $height) {
$info = image_get_info($source);
if ($width >= $info['width'] && $height >= $info['height']) {
return FALSE;
}
$aspect = $info['height'] / $info['width'];
if ($aspect < $height / $width) {
$width = (int) min($width, $info['width']);
$height = (int) round($width * $aspect);
}
else {
$height = (int) min($height, $info['height']);
$width = (int) round($height / $aspect);
}
return image_toolkit_invoke('resize', array(
$source,
$destination,
$width,
$height,
));
}
function image_resize($source, $destination, $width, $height) {
return image_toolkit_invoke('resize', array(
$source,
$destination,
$width,
$height,
));
}
function image_rotate($source, $destination, $degrees) {
return image_toolkit_invoke('rotate', array(
$source,
$destination,
$degrees,
));
}
function image_crop($source, $destination, $x, $y, $width, $height) {
return image_toolkit_invoke('crop', array(
$source,
$destination,
$x,
$y,
$width,
$height,
));
}
function image_gd_settings() {
if (image_gd_check_settings()) {
$form = array();
$form['status'] = array(
'#value' => t('The built-in GD2 toolkit is installed and working properly.'),
);
$form['image_jpeg_quality'] = array(
'#type' => 'textfield',
'#title' => t('JPEG quality'),
'#description' => t('Define the image quality for JPEG manipulations. Ranges from 0 to 100. Higher values mean better image quality but bigger files.'),
'#size' => 10,
'#maxlength' => 3,
'#default_value' => variable_get('image_jpeg_quality', 75),
'#field_suffix' => t('%'),
);
return $form;
}
else {
form_set_error('image_toolkit', t('The built-in GD image toolkit requires that the GD module for PHP be installed and configured properly. For more information see <a href="@url">PHP\'s image documentation</a>.', array(
'@url' => 'http://php.net/image',
)));
return FALSE;
}
}
function image_gd_check_settings() {
if ($check = get_extension_funcs('gd')) {
if (in_array('imagegd2', $check)) {
return TRUE;
}
}
return FALSE;
}
function image_gd_resize($source, $destination, $width, $height) {
if (!file_exists($source)) {
return FALSE;
}
$info = image_get_info($source);
if (!$info) {
return FALSE;
}
$im = image_gd_open($source, $info['extension']);
if (!$im) {
return FALSE;
}
$res = imagecreatetruecolor($width, $height);
if ($info['extension'] == 'png') {
$transparency = imagecolorallocatealpha($res, 0, 0, 0, 127);
imagealphablending($res, FALSE);
imagefilledrectangle($res, 0, 0, $width, $height, $transparency);
imagealphablending($res, TRUE);
imagesavealpha($res, TRUE);
}
elseif ($info['extension'] == 'gif') {
$transparency_index = imagecolortransparent($im);
if ($transparency_index >= 0) {
$transparent_color = imagecolorsforindex($im, $transparency_index);
$transparency_index = imagecolorallocate($res, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']);
imagefill($res, 0, 0, $transparency_index);
imagecolortransparent($res, $transparency_index);
$number_colors = imagecolorstotal($im);
imagetruecolortopalette($res, TRUE, $number_colors);
}
}
imagecopyresampled($res, $im, 0, 0, 0, 0, $width, $height, $info['width'], $info['height']);
$result = image_gd_close($res, $destination, $info['extension']);
imagedestroy($res);
imagedestroy($im);
return $result;
}
function image_gd_rotate($source, $destination, $degrees, $bg_color = 0) {
if (!function_exists('imageRotate')) {
return FALSE;
}
$info = image_get_info($source);
if (!$info) {
return FALSE;
}
$im = image_gd_open($source, $info['extension']);
if (!$im) {
return FALSE;
}
$res = imageRotate($im, $degrees, $bg_color);
$result = image_gd_close($res, $destination, $info['extension']);
return $result;
}
function image_gd_crop($source, $destination, $x, $y, $width, $height) {
$info = image_get_info($source);
if (!$info) {
return FALSE;
}
$im = image_gd_open($source, $info['extension']);
$res = imageCreateTrueColor($width, $height);
imageCopy($res, $im, 0, 0, $x, $y, $width, $height);
$result = image_gd_close($res, $destination, $info['extension']);
imageDestroy($res);
imageDestroy($im);
return $result;
}
function image_gd_open($file, $extension) {
$extension = str_replace('jpg', 'jpeg', $extension);
$open_func = 'imageCreateFrom' . $extension;
if (!function_exists($open_func)) {
return FALSE;
}
return $open_func($file);
}
function image_gd_close($res, $destination, $extension) {
$extension = str_replace('jpg', 'jpeg', $extension);
$close_func = 'image' . $extension;
if (!function_exists($close_func)) {
return FALSE;
}
if ($extension == 'jpeg') {
return $close_func($res, $destination, variable_get('image_jpeg_quality', 75));
}
else {
return $close_func($res, $destination);
}
}