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Image.php
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Image.php
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<?php
/*
* This file is part of the Imagine package.
*
* (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Imagine\Gd;
use Imagine\Driver\InfoProvider;
use Imagine\Exception\InvalidArgumentException;
use Imagine\Exception\OutOfBoundsException;
use Imagine\Exception\RuntimeException;
use Imagine\Factory\ClassFactoryInterface;
use Imagine\Image\AbstractImage;
use Imagine\Image\BoxInterface;
use Imagine\Image\Fill\FillInterface;
use Imagine\Image\Format;
use Imagine\Image\ImageInterface;
use Imagine\Image\Metadata\MetadataBag;
use Imagine\Image\Palette\Color\ColorInterface;
use Imagine\Image\Palette\Color\RGB as RGBColor;
use Imagine\Image\Palette\PaletteInterface;
use Imagine\Image\Point;
use Imagine\Image\PointInterface;
use Imagine\Image\ProfileInterface;
use Imagine\Utils\ErrorHandling;
/**
* Image implementation using the GD library.
*/
final class Image extends AbstractImage implements InfoProvider
{
/**
* @var resource|\GdImage
*/
private $resource;
/**
* @var \Imagine\Gd\Layers|null
*/
private $layers;
/**
* @var \Imagine\Image\Palette\PaletteInterface
*/
private $palette;
/**
* Constructs a new Image instance.
*
* @param resource|\GdImage $resource
* @param \Imagine\Image\Palette\PaletteInterface $palette
* @param \Imagine\Image\Metadata\MetadataBag $metadata
*/
public function __construct($resource, PaletteInterface $palette, MetadataBag $metadata)
{
$this->metadata = $metadata;
$this->palette = $palette;
$this->resource = $resource;
}
/**
* Makes sure the current image resource is destroyed.
*/
public function __destruct()
{
if ($this->resource) {
if (is_resource($this->resource) && get_resource_type($this->resource) === 'gd' || $this->resource instanceof \GdImage) {
imagedestroy($this->resource);
}
$this->resource = null;
}
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\AbstractImage::__clone()
*/
public function __clone()
{
parent::__clone();
$size = $this->getSize();
$copy = $this->createImage($size, 'copy');
if (imagecopy($copy, $this->resource, 0, 0, 0, 0, $size->getWidth(), $size->getHeight()) === false) {
imagedestroy($copy);
throw new RuntimeException('Image copy operation failed');
}
$this->resource = $copy;
$this->palette = clone $this->palette;
if ($this->layers !== null) {
$this->layers = $this->getClassFactory()->createLayers(ClassFactoryInterface::HANDLE_GD, $this, $this->layers->key());
}
}
/**
* {@inheritdoc}
*
* @see \Imagine\Driver\InfoProvider::getDriverInfo()
* @since 1.3.0
*/
public static function getDriverInfo($required = true)
{
return DriverInfo::get($required);
}
/**
* Returns Gd resource.
*
* @return resource|\GdImage
*/
public function getGdResource()
{
return $this->resource;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::copy()
*/
final public function copy()
{
return clone $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::crop()
*/
final public function crop(PointInterface $start, BoxInterface $size)
{
if (!$start->in($this->getSize())) {
throw new OutOfBoundsException('Crop coordinates must start at minimum 0, 0 position from top left corner, crop height and width must be positive integers and must not exceed the current image borders');
}
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'crop');
if (imagecopy($dest, $this->resource, 0, 0, $start->getX(), $start->getY(), $width, $height) === false) {
imagedestroy($dest);
throw new RuntimeException('Image crop operation failed');
}
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::paste()
*/
final public function paste(ImageInterface $image, PointInterface $start, $alpha = 100)
{
if (!$image instanceof self) {
throw new InvalidArgumentException(sprintf('Gd\Image can only paste() Gd\Image instances, %s given', get_class($image)));
}
$alpha = (int) round($alpha);
if ($alpha < 0 || $alpha > 100) {
throw new InvalidArgumentException(sprintf('The %1$s argument can range from %2$d to %3$d, but you specified %4$d.', '$alpha', 0, 100, $alpha));
}
$size = $image->getSize();
if ($alpha === 100) {
imagealphablending($this->resource, true);
imagealphablending($image->resource, true);
$success = imagecopy($this->resource, $image->resource, $start->getX(), $start->getY(), 0, 0, $size->getWidth(), $size->getHeight());
imagealphablending($this->resource, false);
imagealphablending($image->resource, false);
if ($success === false) {
throw new RuntimeException('Image paste operation failed');
}
} elseif ($alpha > 0) {
if (imagecopymerge(/*dst_im*/$this->resource, /*src_im*/$image->resource, /*dst_x*/$start->getX(), /*dst_y*/$start->getY(), /*src_x*/0, /*src_y*/0, /*src_w*/$size->getWidth(), /*src_h*/$size->getHeight(), /*pct*/$alpha) === false) {
throw new RuntimeException('Image paste operation failed');
}
}
return $this;
}
/**
* {@inheritdoc}
*
* Please remark that GD doesn't support different filters, so the $filter argument is ignored.
*
* @see \Imagine\Image\ManipulatorInterface::resize()
*/
final public function resize(BoxInterface $size, $filter = ImageInterface::FILTER_UNDEFINED)
{
if (!in_array($filter, static::getAllFilterValues(), true)) {
throw new InvalidArgumentException('Unsupported filter type');
}
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'resize');
imagealphablending($this->resource, true);
imagealphablending($dest, true);
$success = imagecopyresampled($dest, $this->resource, 0, 0, 0, 0, $width, $height, imagesx($this->resource), imagesy($this->resource));
imagealphablending($this->resource, false);
imagealphablending($dest, false);
if ($success === false) {
imagedestroy($dest);
throw new RuntimeException('Image resize operation failed');
}
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::rotate()
*/
final public function rotate($angle, ColorInterface $background = null)
{
if ($background === null) {
$background = $this->palette->color('fff');
}
$color = $this->getColor($background);
$resource = imagerotate($this->resource, -1 * $angle, $color);
if ($resource === false) {
throw new RuntimeException('Image rotate operation failed');
}
imagedestroy($this->resource);
$this->resource = $resource;
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::save()
*/
final public function save($path = null, array $options = array())
{
$path = $path === null ? (isset($this->metadata['filepath']) ? $this->metadata['filepath'] : $path) : $path;
if ($path === null) {
throw new RuntimeException('You can omit save path only if image has been open from a file');
}
if (isset($options['format'])) {
$format = $options['format'];
} elseif ('' !== $extension = pathinfo($path, \PATHINFO_EXTENSION)) {
$format = $extension;
} else {
$originalPath = isset($this->metadata['filepath']) ? $this->metadata['filepath'] : null;
$format = pathinfo($originalPath, \PATHINFO_EXTENSION);
}
$formatInfo = static::getDriverInfo()->getSupportedFormats()->find($format);
if ($formatInfo === null) {
throw new InvalidArgumentException(sprintf(
'Saving image in "%s" format is not supported, please use one of the following extensions: "%s"',
$format,
implode('", "', static::getDriverInfo()->getSupportedFormats()->getAllIDs())
));
}
$this->saveOrOutput($formatInfo, $options, $path);
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::show()
*/
public function show($format, array $options = array())
{
$formatInfo = static::getDriverInfo()->getSupportedFormats()->find($format);
if ($formatInfo === null) {
throw new InvalidArgumentException(sprintf(
'Displaying an image in "%s" format is not supported, please use one of the following formats: "%s"',
$format,
implode('", "', static::getDriverInfo()->getSupportedFormats()->getAllIDs())
));
}
header('Content-type: ' . $formatInfo->getMimeType());
$this->saveOrOutput($formatInfo, $options);
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::get()
*/
public function get($format, array $options = array())
{
$formatInfo = static::getDriverInfo()->getSupportedFormats()->find($format);
if ($formatInfo === null) {
throw new InvalidArgumentException(sprintf(
'Creating an image in "%s" format is not supported, please use one of the following formats: "%s"',
$format,
implode('", "', static::getDriverInfo()->getSupportedFormats()->getAllIDs())
));
}
ob_start();
$this->saveOrOutput($formatInfo, $options);
return ob_get_clean();
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::__toString()
*/
public function __toString()
{
return $this->get(Format::ID_PNG);
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::flipHorizontally()
*/
final public function flipHorizontally()
{
if (function_exists('imageflip')) {
imageflip($this->resource, IMG_FLIP_HORIZONTAL);
} else {
$size = $this->getSize();
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'flip');
for ($i = 0; $i < $width; $i++) {
if (imagecopy($dest, $this->resource, $i, 0, ($width - 1) - $i, 0, 1, $height) === false) {
imagedestroy($dest);
throw new RuntimeException('Horizontal flip operation failed');
}
}
imagedestroy($this->resource);
$this->resource = $dest;
}
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::flipVertically()
*/
final public function flipVertically()
{
if (function_exists('imageflip')) {
imageflip($this->resource, IMG_FLIP_VERTICAL);
} else {
$size = $this->getSize();
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'flip');
for ($i = 0; $i < $height; $i++) {
if (imagecopy($dest, $this->resource, 0, $i, 0, ($height - 1) - $i, $width, 1) === false) {
imagedestroy($dest);
throw new RuntimeException('Vertical flip operation failed');
}
}
imagedestroy($this->resource);
$this->resource = $dest;
}
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::strip()
*/
final public function strip()
{
// GD strips profiles and comment, so there's nothing to do here
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::draw()
*/
public function draw()
{
return $this->getClassFactory()->createDrawer(ClassFactoryInterface::HANDLE_GD, $this->resource);
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::effects()
*/
public function effects()
{
return $this->getClassFactory()->createEffects(ClassFactoryInterface::HANDLE_GD, $this->resource);
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::getSize()
*/
public function getSize()
{
return $this->getClassFactory()->createBox(imagesx($this->resource), imagesy($this->resource));
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::applyMask()
*/
public function applyMask(ImageInterface $mask)
{
if (!$mask instanceof self) {
throw new InvalidArgumentException('Cannot mask non-gd images');
}
$size = $this->getSize();
$maskSize = $mask->getSize();
if ($size != $maskSize) {
throw new InvalidArgumentException(sprintf('The given mask doesn\'t match current image\'s size, Current mask\'s dimensions are %s, while image\'s dimensions are %s', $maskSize, $size));
}
for ($x = 0, $width = $size->getWidth(); $x < $width; $x++) {
for ($y = 0, $height = $size->getHeight(); $y < $height; $y++) {
$position = new Point($x, $y);
$color = $this->getColorAt($position);
$maskColor = $mask->getColorAt($position);
$delta = (int) round($color->getAlpha() * $maskColor->getRed() / 255) * -1;
if (imagesetpixel($this->resource, $x, $y, $this->getColor($color->dissolve($delta))) === false) {
throw new RuntimeException('Apply mask operation failed');
}
}
}
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ManipulatorInterface::fill()
*/
public function fill(FillInterface $fill)
{
$size = $this->getSize();
for ($x = 0, $width = $size->getWidth(); $x < $width; $x++) {
for ($y = 0, $height = $size->getHeight(); $y < $height; $y++) {
if (imagesetpixel($this->resource, $x, $y, $this->getColor($fill->getColor(new Point($x, $y)))) === false) {
throw new RuntimeException('Fill operation failed');
}
}
}
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::mask()
*/
public function mask()
{
$mask = $this->copy();
if (imagefilter($mask->resource, IMG_FILTER_GRAYSCALE) === false) {
throw new RuntimeException('Mask operation failed');
}
return $mask;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::histogram()
*/
public function histogram()
{
$size = $this->getSize();
$colors = array();
for ($x = 0, $width = $size->getWidth(); $x < $width; $x++) {
for ($y = 0, $height = $size->getHeight(); $y < $height; $y++) {
$colors[] = $this->getColorAt(new Point($x, $y));
}
}
return array_values(array_unique($colors));
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::getColorAt()
*/
public function getColorAt(PointInterface $point)
{
if (!$point->in($this->getSize())) {
throw new RuntimeException(sprintf('Error getting color at point [%s,%s]. The point must be inside the image of size [%s,%s]', $point->getX(), $point->getY(), $this->getSize()->getWidth(), $this->getSize()->getHeight()));
}
$index = imagecolorat($this->resource, $point->getX(), $point->getY());
$info = imagecolorsforindex($this->resource, $index);
return $this->palette->color(array($info['red'], $info['green'], $info['blue']), max(min(100 - (int) round($info['alpha'] / 127 * 100), 100), 0));
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::layers()
*/
public function layers()
{
if ($this->layers === null) {
$this->layers = $this->getClassFactory()->createLayers(ClassFactoryInterface::HANDLE_GD, $this);
}
return $this->layers;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::interlace()
*/
public function interlace($scheme)
{
static $supportedInterlaceSchemes = array(
ImageInterface::INTERLACE_NONE => 0,
ImageInterface::INTERLACE_LINE => 1,
ImageInterface::INTERLACE_PLANE => 1,
ImageInterface::INTERLACE_PARTITION => 1,
);
if (!array_key_exists($scheme, $supportedInterlaceSchemes)) {
throw new InvalidArgumentException('Unsupported interlace type');
}
imageinterlace($this->resource, $supportedInterlaceSchemes[$scheme]);
return $this;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::palette()
*/
public function palette()
{
return $this->palette;
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::profile()
*/
public function profile(ProfileInterface $profile)
{
static::getDriverInfo()->requireFeature(DriverInfo::FEATURE_COLORPROFILES);
}
/**
* {@inheritdoc}
*
* @see \Imagine\Image\ImageInterface::usePalette()
*/
public function usePalette(PaletteInterface $palette)
{
if ($this->palette->name() === $palette->name()) {
return $this;
}
static::getDriverInfo()->requirePaletteSupport($palette);
$this->palette = $palette;
return $this;
}
/**
* Performs save or show operation using one of GD's image... functions.
*
* @param \Imagine\Image\Format $format
* @param array $options
* @param string $filename
*
* @throws \Imagine\Exception\InvalidArgumentException
* @throws \Imagine\Exception\RuntimeException
*/
private function saveOrOutput(Format $format, array $options, $filename = null)
{
switch ($format->getID()) {
default:
$saveFunction = 'image' . $format->getID();
break;
}
$args = array_merge(array(&$this->resource, $filename), $this->finalizeOptions($format, $options));
ErrorHandling::throwingRuntimeException(E_WARNING | E_NOTICE, function () use ($saveFunction, $args) {
if (call_user_func_array($saveFunction, $args) === false) {
throw new RuntimeException('Save operation failed');
}
});
}
/**
* @param \Imagine\Image\Format $format
* @param array $options
*
* @throws \Imagine\Exception\InvalidArgumentException
*
* @return array
*/
private function finalizeOptions(Format $format, array $options)
{
$result = array();
switch ($format->getID()) {
case Format::ID_AVIF:
// ranges from 0 (worst quality, smaller file) to 100 (best quality, larger file). If -1 is provided, the default value is used
$quality = -1;
// ranges from 0 (slow, smaller file) to 10 (fast, larger file). If -1 is provided, the default value is used
$speed = -1;
if (!empty($options['avif_lossless'])) {
$quality = 100;
} else {
if (!isset($options['avif_quality'])) {
if (isset($options['quality'])) {
$options['avif_quality'] = $options['quality'];
}
}
if (isset($options['avif_quality'])) {
$quality = max(0, min(100, $options['avif_quality']));
}
}
$result[] = $quality;
$result[] = $speed;
break;
case Format::ID_BMP:
if (isset($options['compressed'])) {
$result[] = (bool) $options['compressed'];
}
break;
case Format::ID_JPEG:
if (!isset($options['jpeg_quality'])) {
if (isset($options['quality'])) {
$options['jpeg_quality'] = $options['quality'];
}
}
if (isset($options['jpeg_quality'])) {
$result[] = $options['jpeg_quality'];
}
break;
case Format::ID_PNG:
if (!isset($options['png_compression_level'])) {
if (isset($options['quality'])) {
$options['png_compression_level'] = round((100 - $options['quality']) * 9 / 100);
}
}
if (isset($options['png_compression_level'])) {
if ($options['png_compression_level'] < 0 || $options['png_compression_level'] > 9) {
throw new InvalidArgumentException('png_compression_level option should be an integer from 0 to 9');
}
$result[] = $options['png_compression_level'];
} else {
$result[] = -1; // use default level
}
if (!isset($options['png_compression_filter'])) {
if (isset($options['filters'])) {
$options['png_compression_filter'] = $options['filters'];
}
}
if (isset($options['png_compression_filter'])) {
if (~PNG_ALL_FILTERS & $options['png_compression_filter']) {
throw new InvalidArgumentException('png_compression_filter option should be a combination of the PNG_FILTER_XXX constants');
}
$result[] = $options['png_compression_filter'];
}
break;
case Format::ID_WEBP:
if (!isset($options['webp_quality'])) {
if (isset($options['quality'])) {
$options['webp_quality'] = $options['quality'];
}
}
if (isset($options['webp_quality'])) {
if ($options['webp_quality'] < 0 || $options['webp_quality'] > 100) {
throw new InvalidArgumentException('webp_quality option should be an integer from 0 to 100');
}
$result[] = $options['webp_quality'];
}
break;
case Format::ID_XBM:
case Format::ID_WBMP:
if (isset($options['foreground'])) {
$result[] = $options['foreground'];
}
break;
}
return $result;
}
/**
* Generates a GD image.
*
* @param \Imagine\Image\BoxInterface $size
* @param string $operation the operation initiating the creation
*
* @throws \Imagine\Exception\RuntimeException
*
* @return resource|\GdImage
*/
private function createImage(BoxInterface $size, $operation)
{
$resource = imagecreatetruecolor($size->getWidth(), $size->getHeight());
if ($resource === false) {
throw new RuntimeException('Image ' . $operation . ' failed');
}
if (imagealphablending($resource, false) === false || imagesavealpha($resource, true) === false) {
throw new RuntimeException('Image ' . $operation . ' failed');
}
if (function_exists('imageantialias')) {
imageantialias($resource, true);
}
$transparent = imagecolorallocatealpha($resource, 255, 255, 255, 127);
imagefill($resource, 0, 0, $transparent);
imagecolortransparent($resource, $transparent);
return $resource;
}
/**
* Generates a GD color from Color instance.
*
* @param \Imagine\Image\Palette\Color\ColorInterface $color
*
* @throws \Imagine\Exception\RuntimeException
* @throws \Imagine\Exception\InvalidArgumentException
*
* @return int A color identifier
*/
private function getColor(ColorInterface $color)
{
if (!$color instanceof RGBColor) {
throw new InvalidArgumentException('GD driver only supports RGB colors');
}
$index = imagecolorallocatealpha($this->resource, $color->getRed(), $color->getGreen(), $color->getBlue(), round(127 * (100 - $color->getAlpha()) / 100));
if ($index === false) {
throw new RuntimeException(sprintf('Unable to allocate color "RGB(%s, %s, %s)" with transparency of %d percent', $color->getRed(), $color->getGreen(), $color->getBlue(), $color->getAlpha()));
}
return $index;
}
}