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GValue.php
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<?php
/**
* Vips is a php binding for the vips image processing library
*
* PHP version 7
*
* LICENSE:
*
* Copyright (c) 2016 John Cupitt
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @category Images
* @package Jcupitt\Vips
* @author John Cupitt <jcupitt@gmail.com>
* @copyright 2016 John Cupitt
* @license https://opensource.org/licenses/MIT MIT
* @link https://github.com/libvips/php-vips
*/
namespace Jcupitt\Vips;
class GValue
{
private \FFI\CData $struct;
public \FFI\CData $pointer;
public function __construct()
{
# allocate a gvalue on the heap, and make it persistent between requests
$this->struct = FFI::gobject()->new("GValue", true, true);
$this->pointer = \FFI::addr($this->struct);
# GValue needs to be inited to all zero
\FFI::memset($this->pointer, 0, \FFI::sizeof($this->struct));
}
/**
* Turn a string into an enum value, if possible
* @throws Exception
*/
public static function toEnum(int $gtype, $value): int
{
if (is_string($value)) {
$enum_value = FFI::vips()->
vips_enum_from_nick("php-vips", $gtype, $value);
if ($enum_value < 0) {
throw new Exception();
}
} else {
$enum_value = $value;
}
return $enum_value;
}
/**
* Turn an enum into a string, if possible
* @throws Exception
*/
public static function fromEnum(int $gtype, int $value): string
{
$result = FFI::vips()->vips_enum_nick($gtype, $value);
if ($result === null) {
throw new Exception("value not in enum");
}
return $result;
}
public function __destruct()
{
FFI::gobject()->g_value_unset($this->pointer);
}
public function setType(int $gtype): void
{
FFI::gobject()->g_value_init($this->pointer, $gtype);
}
public function getType(): int
{
return $this->pointer->g_type;
}
/**
* Set a GValue.
*
* @param mixed $value Value to be set.
*
* @throws Exception
*/
public function set($value): void
{
$gtype = $this->getType();
switch ($gtype) {
case FFI::gtypes("gboolean"):
FFI::gobject()->g_value_set_boolean($this->pointer, $value);
break;
case FFI::gtypes("gint"):
FFI::gobject()->g_value_set_int($this->pointer, $value);
break;
case FFI::gtypes("gint64"):
FFI::gobject()->g_value_set_int64($this->pointer, $value);
break;
case FFI::gtypes("guint64"):
FFI::gobject()->g_value_set_uint64($this->pointer, $value);
break;
case FFI::gtypes("gdouble"):
FFI::gobject()->g_value_set_double($this->pointer, $value);
break;
case FFI::gtypes("gchararray"):
FFI::gobject()->g_value_set_string($this->pointer, $value);
break;
case FFI::gtypes("VipsRefString"):
FFI::vips()->
vips_value_set_ref_string($this->pointer, $value);
break;
case FFI::gtypes("VipsArrayInt"):
if (!is_array($value)) {
$value = [$value];
}
$n = count($value);
$array = \FFI::new("int[$n]");
for ($i = 0; $i < $n; $i++) {
$array[$i] = $value[$i];
}
FFI::vips()->
vips_value_set_array_int($this->pointer, $array, $n);
break;
case FFI::gtypes("VipsArrayDouble"):
if (!is_array($value)) {
$value = [$value];
}
$n = count($value);
$array = \FFI::new("double[$n]");
for ($i = 0; $i < $n; $i++) {
$array[$i] = $value[$i];
}
FFI::vips()->
vips_value_set_array_double($this->pointer, $array, $n);
break;
case FFI::gtypes("VipsArrayImage"):
if (!is_array($value)) {
$value = [$value];
}
$n = count($value);
FFI::vips()->vips_value_set_array_image($this->pointer, $n);
$array = FFI::vips()->
vips_value_get_array_image($this->pointer, null);
for ($i = 0; $i < $n; $i++) {
$image = $value[$i];
$array[$i] = $image->pointer;
$image->ref();
}
break;
case FFI::gtypes("VipsBlob"):
# we need to set the blob to a copy of the data that vips_lib
# can own and free
$n = strlen($value);
$memory = \FFI::new("char[$n]", false, true);
for ($i = 0; $i < $n; $i++) {
$memory[$i] = $value[$i];
}
FFI::vips()->
vips_value_set_blob_free($this->pointer, $memory, $n);
break;
default:
$fundamental = FFI::gobject()->g_type_fundamental($gtype);
switch ($fundamental) {
case FFI::gtypes("GObject"):
FFI::gobject()->
g_value_set_object($this->pointer, $value->pointer);
break;
case FFI::gtypes("GEnum"):
FFI::gobject()->g_value_set_enum(
$this->pointer,
self::toEnum($gtype, $value)
);
break;
case FFI::gtypes("GFlags"):
/* Just set as int.
*/
FFI::gobject()->
g_value_set_flags($this->pointer, $value);
break;
default:
$typeName = FFI::gobject()->g_type_name($gtype);
throw new \BadMethodCallException(
"gtype $typeName ($gtype) not implemented"
);
}
}
}
/**
* Get the contents of a GValue.
*
* @return mixed The contents of this GValue.
*
* @throws Exception
*/
public function get()
{
$gtype = $this->getType();
$result = null;
switch ($gtype) {
case FFI::gtypes("gboolean"):
$result = FFI::gobject()->g_value_get_boolean($this->pointer);
break;
case FFI::gtypes("gint"):
$result = FFI::gobject()->g_value_get_int($this->pointer);
break;
case FFI::gtypes("gint64"):
$result = FFI::gobject()->g_value_get_int64($this->pointer);
break;
case FFI::gtypes("guint64"):
$result = FFI::gobject()->g_value_get_uint64($this->pointer);
break;
case FFI::gtypes("gdouble"):
$result = FFI::gobject()->g_value_get_double($this->pointer);
break;
case FFI::gtypes("gchararray"):
$result = FFI::gobject()->g_value_get_string($this->pointer);
break;
case FFI::gtypes("VipsRefString"):
$p_size = FFI::vips()->new("size_t[1]");
$result = FFI::vips()->
vips_value_get_ref_string($this->pointer, $p_size);
# $p_size[0] will be the string length, but assume it's null
# terminated
break;
case FFI::gtypes("VipsImage"):
$pointer = FFI::gobject()->g_value_get_object($this->pointer);
$result = new Image($pointer);
// get_object does not increment the ref count
$result->ref();
break;
case FFI::gtypes("VipsArrayInt"):
$p_len = FFI::vips()->new("int[1]");
$pointer = FFI::vips()->
vips_value_get_array_int($this->pointer, $p_len);
$result = [];
for ($i = 0; $i < $p_len[0]; $i++) {
$result[] = $pointer[$i];
}
break;
case FFI::gtypes("VipsArrayDouble"):
$p_len = FFI::vips()->new("int[1]");
$pointer = FFI::vips()->
vips_value_get_array_double($this->pointer, $p_len);
$result = [];
for ($i = 0; $i < $p_len[0]; $i++) {
$result[] = $pointer[$i];
}
break;
case FFI::gtypes("VipsArrayImage"):
$p_len = FFI::vips()->new("int[1]");
$pointer = FFI::vips()->
vips_value_get_array_image($this->pointer, $p_len);
$result = [];
for ($i = 0; $i < $p_len[0]; $i++) {
$image = new Image($pointer[$i]);
$image->ref();
$result[] = $image;
}
break;
case FFI::gtypes("VipsBlob"):
$p_len = FFI::vips()->new("size_t[1]");
$pointer = FFI::vips()->
vips_value_get_blob($this->pointer, $p_len);
$result = \FFI::string($pointer, $p_len[0]);
break;
default:
$fundamental = FFI::gobject()->g_type_fundamental($gtype);
switch ($fundamental) {
case FFI::gtypes("GEnum"):
$result = FFI::gobject()->
g_value_get_enum($this->pointer);
$result = self::fromEnum($gtype, $result);
break;
case FFI::gtypes("GFlags"):
/* Just get as int.
*/
$result = FFI::gobject()->
g_value_get_flags($this->pointer);
break;
default:
$typeName = FFI::gobject()->g_type_name($gtype);
throw new \BadMethodCallException(
"gtype $typeName ($gtype) not implemented"
);
}
}
return $result;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: expandtab sw=4 ts=4 fdm=marker
* vim<600: expandtab sw=4 ts=4
*/