/**
* Crop an Image to a given size.
*
* @since 2.1.0
*
* @param string|int $src_file The source file or Attachment ID.
* @param int $src_x The start x position to crop from.
* @param int $src_y The start y position to crop from.
* @param int $src_w The width to crop.
* @param int $src_h The height to crop.
* @param int $dst_w The destination width.
* @param int $dst_h The destination height.
* @param int $src_abs Optional. If the source crop points are absolute.
* @param string $dst_file Optional. The destination file to write to.
* @return string|nxt_Error|false New filepath on success, nxt_Error or false on failure.
*/
function nxt_crop_image($src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false)
{
if (is_numeric($src_file)) {
// Handle int as attachment ID
$src_file = get_attached_file($src_file);
}
$src = nxt_load_image($src_file);
if (!is_resource($src)) {
return new nxt_Error('error_loading_image', $src, $src_file);
}
$dst = nxt_imagecreatetruecolor($dst_w, $dst_h);
if ($src_abs) {
$src_w -= $src_x;
$src_h -= $src_y;
}
if (function_exists('imageantialias')) {
imageantialias($dst, true);
}
imagecopyresampled($dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
imagedestroy($src);
// Free up memory
if (!$dst_file) {
$dst_file = str_replace(basename($src_file), 'cropped-' . basename($src_file), $src_file);
}
$dst_file = preg_replace('/\\.[^\\.]+$/', '.jpg', $dst_file);
if (imagejpeg($dst, $dst_file, apply_filters('jpeg_quality', 90, 'nxt_crop_image'))) {
return $dst_file;
} else {
return false;
}
}
/**
* Scale down an image to fit a particular size and save a new copy of the image.
*
* The PNG transparency will be preserved using the function, as well as the
* image type. If the file going in is PNG, then the resized image is going to
* be PNG. The only supported image types are PNG, GIF, and JPEG.
*
* Some functionality requires API to exist, so some PHP version may lose out
* support. This is not the fault of NXTClass (where functionality is
* downgraded, not actual defects), but of your PHP version.
*
* @since 2.5.0
*
* @param string $file Image file path.
* @param int $max_w Maximum width to resize to.
* @param int $max_h Maximum height to resize to.
* @param bool $crop Optional. Whether to crop image or resize.
* @param string $suffix Optional. File suffix.
* @param string $dest_path Optional. New image file path.
* @param int $jpeg_quality Optional, default is 90. Image quality percentage.
* @return mixed nxt_Error on failure. String with new destination path.
*/
function image_resize($file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90)
{
$image = nxt_load_image($file);
if (!is_resource($image)) {
return new nxt_Error('error_loading_image', $image, $file);
}
$size = @getimagesize($file);
if (!$size) {
return new nxt_Error('invalid_image', __('Could not read image size'), $file);
}
list($orig_w, $orig_h, $orig_type) = $size;
$dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
if (!$dims) {
return new nxt_Error('error_getting_dimensions', __('Could not calculate resized image dimensions'));
}
list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
$newimage = nxt_imagecreatetruecolor($dst_w, $dst_h);
imagecopyresampled($newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
// convert from full colors to index colors, like original PNG.
if (IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor($image)) {
imagetruecolortopalette($newimage, false, imagecolorstotal($image));
}
// we don't need the original in memory anymore
imagedestroy($image);
// $suffix will be appended to the destination filename, just before the extension
if (!$suffix) {
$suffix = "{$dst_w}x{$dst_h}";
}
$info = pathinfo($file);
$dir = $info['dirname'];
$ext = $info['extension'];
$name = nxt_basename($file, ".{$ext}");
if (!is_null($dest_path) and $_dest_path = realpath($dest_path)) {
$dir = $_dest_path;
}
$destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
if (IMAGETYPE_GIF == $orig_type) {
if (!imagegif($newimage, $destfilename)) {
return new nxt_Error('resize_path_invalid', __('Resize path invalid'));
}
} elseif (IMAGETYPE_PNG == $orig_type) {
if (!imagepng($newimage, $destfilename)) {
return new nxt_Error('resize_path_invalid', __('Resize path invalid'));
}
} else {
// all other formats are converted to jpg
$destfilename = "{$dir}/{$name}-{$suffix}.jpg";
if (!imagejpeg($newimage, $destfilename, apply_filters('jpeg_quality', $jpeg_quality, 'image_resize'))) {
return new nxt_Error('resize_path_invalid', __('Resize path invalid'));
}
}
imagedestroy($newimage);
// Set correct file permissions
$stat = stat(dirname($destfilename));
$perms = $stat['mode'] & 0666;
//same permissions as parent folder, strip off the executable bits
@chmod($destfilename, $perms);
return $destfilename;
}
