%PDF-
%PDF-
Mini Shell
Mini Shell
<?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\Image\AbstractImage;
use Imagine\Image\ImageInterface;
use Imagine\Image\Box;
use Imagine\Image\BoxInterface;
use Imagine\Image\Metadata\MetadataBag;
use Imagine\Image\Palette\Color\ColorInterface;
use Imagine\Image\Fill\FillInterface;
use Imagine\Image\Point;
use Imagine\Image\PointInterface;
use Imagine\Image\Palette\PaletteInterface;
use Imagine\Image\Palette\Color\RGB as RGBColor;
use Imagine\Image\ProfileInterface;
use Imagine\Image\Palette\RGB;
use Imagine\Exception\InvalidArgumentException;
use Imagine\Exception\OutOfBoundsException;
use Imagine\Exception\RuntimeException;
/**
* Image implementation using the GD library
*/
final class Image extends AbstractImage
{
/**
* @var resource
*/
private $resource;
/**
* @var Layers|null
*/
private $layers;
/**
* @var PaletteInterface
*/
private $palette;
/**
* Constructs a new Image instance
*
* @param resource $resource
* @param PaletteInterface $palette
* @param MetadataBag $metadata
*/
public function __construct($resource, PaletteInterface $palette, MetadataBag $metadata)
{
$this->metadata = $metadata;
$this->palette = $palette;
$this->resource = $resource;
}
/**
* Makes sure the current image resource is destroyed
*/
public function __destruct()
{
if (is_resource($this->resource) && 'gd' === get_resource_type($this->resource)) {
imagedestroy($this->resource);
}
}
/**
* Returns Gd resource
*
* @return resource
*/
public function getGdResource()
{
return $this->resource;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function copy()
{
$size = $this->getSize();
$copy = $this->createImage($size, 'copy');
if (false === imagecopy($copy, $this->resource, 0, 0, 0, 0, $size->getWidth(), $size->getHeight())) {
throw new RuntimeException('Image copy operation failed');
}
return new Image($copy, $this->palette, $this->metadata);
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
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 (false === imagecopy($dest, $this->resource, 0, 0, $start->getX(), $start->getY(), $width, $height)) {
throw new RuntimeException('Image crop operation failed');
}
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function paste(ImageInterface $image, PointInterface $start)
{
if (!$image instanceof self) {
throw new InvalidArgumentException(sprintf('Gd\Image can only paste() Gd\Image instances, %s given', get_class($image)));
}
$size = $image->getSize();
if (!$this->getSize()->contains($size, $start)) {
throw new OutOfBoundsException('Cannot paste image of the given size at the specified position, as it moves outside of the current image\'s box');
}
imagealphablending($this->resource, true);
imagealphablending($image->resource, true);
if (false === imagecopy($this->resource, $image->resource, $start->getX(), $start->getY(), 0, 0, $size->getWidth(), $size->getHeight())) {
throw new RuntimeException('Image paste operation failed');
}
imagealphablending($this->resource, false);
imagealphablending($image->resource, false);
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function resize(BoxInterface $size, $filter = ImageInterface::FILTER_UNDEFINED)
{
if (ImageInterface::FILTER_UNDEFINED !== $filter) {
throw new InvalidArgumentException('Unsupported filter type, GD only supports ImageInterface::FILTER_UNDEFINED filter');
}
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'resize');
imagealphablending($this->resource, true);
imagealphablending($dest, true);
if (false === imagecopyresampled($dest, $this->resource, 0, 0, 0, 0, $width, $height, imagesx($this->resource), imagesy($this->resource))) {
throw new RuntimeException('Image resize operation failed');
}
imagealphablending($this->resource, false);
imagealphablending($dest, false);
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function rotate($angle, ColorInterface $background = null)
{
$color = $background ? $background : $this->palette->color('fff');
$resource = imagerotate($this->resource, -1 * $angle, $this->getColor($color));
if (false === $resource) {
throw new RuntimeException('Image rotate operation failed');
}
imagedestroy($this->resource);
$this->resource = $resource;
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function save($path = null, array $options = array())
{
$path = null === $path ? (isset($this->metadata['filepath']) ? $this->metadata['filepath'] : $path) : $path;
if (null === $path) {
throw new RuntimeException('You can omit save path only if image has been open from a file');
}
if (isset($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);
}
$this->saveOrOutput($format, $options, $path);
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
public function show($format, array $options = array())
{
header('Content-type: '.$this->getMimeType($format));
$this->saveOrOutput($format, $options);
return $this;
}
/**
* {@inheritdoc}
*/
public function get($format, array $options = array())
{
ob_start();
$this->saveOrOutput($format, $options);
return ob_get_clean();
}
/**
* {@inheritdoc}
*/
public function __toString()
{
return $this->get('png');
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function flipHorizontally()
{
$size = $this->getSize();
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'flip');
for ($i = 0; $i < $width; $i++) {
if (false === imagecopy($dest, $this->resource, $i, 0, ($width - 1) - $i, 0, 1, $height)) {
throw new RuntimeException('Horizontal flip operation failed');
}
}
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function flipVertically()
{
$size = $this->getSize();
$width = $size->getWidth();
$height = $size->getHeight();
$dest = $this->createImage($size, 'flip');
for ($i = 0; $i < $height; $i++) {
if (false === imagecopy($dest, $this->resource, 0, $i, 0, ($height - 1) - $i, $width, 1)) {
throw new RuntimeException('Vertical flip operation failed');
}
}
imagedestroy($this->resource);
$this->resource = $dest;
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
final public function strip()
{
// GD strips profiles and comment, so there's nothing to do here
return $this;
}
/**
* {@inheritdoc}
*/
public function draw()
{
return new Drawer($this->resource);
}
/**
* {@inheritdoc}
*/
public function effects()
{
return new Effects($this->resource);
}
/**
* {@inheritdoc}
*/
public function getSize()
{
return new Box(imagesx($this->resource), imagesy($this->resource));
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
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);
$round = (int) round(max($color->getAlpha(), (100 - $color->getAlpha()) * $maskColor->getRed() / 255));
if (false === imagesetpixel($this->resource, $x, $y, $this->getColor($color->dissolve($round - $color->getAlpha())))) {
throw new RuntimeException('Apply mask operation failed');
}
}
}
return $this;
}
/**
* {@inheritdoc}
*
* @return ImageInterface
*/
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; $y++) {
if (false === imagesetpixel($this->resource, $x, $y, $this->getColor($fill->getColor(new Point($x, $y))))) {
throw new RuntimeException('Fill operation failed');
}
}
}
return $this;
}
/**
* {@inheritdoc}
*/
public function mask()
{
$mask = $this->copy();
if (false === imagefilter($mask->resource, IMG_FILTER_GRAYSCALE)) {
throw new RuntimeException('Mask operation failed');
}
return $mask;
}
/**
* {@inheritdoc}
*/
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, $y));
}
}
return array_unique($colors);
}
/**
* {@inheritdoc}
*/
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}
*/
public function layers()
{
if (null === $this->layers) {
$this->layers = new Layers($this, $this->palette, $this->resource);
}
return $this->layers;
}
/**
* {@inheritdoc}
**/
public function interlace($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}
*/
public function palette()
{
return $this->palette;
}
/**
* {@inheritdoc}
*/
public function profile(ProfileInterface $profile)
{
throw new RuntimeException('GD driver does not support color profiles');
}
/**
* {@inheritdoc}
*/
public function usePalette(PaletteInterface $palette)
{
if (!$palette instanceof RGB) {
throw new RuntimeException('GD driver only supports RGB palette');
}
$this->palette = $palette;
return $this;
}
/**
* Internal
*
* Performs save or show operation using one of GD's image... functions
*
* @param string $format
* @param array $options
* @param string $filename
*
* @throws InvalidArgumentException
* @throws RuntimeException
*/
private function saveOrOutput($format, array $options, $filename = null)
{
$format = $this->normalizeFormat($format);
if (!$this->supported($format)) {
throw new InvalidArgumentException(sprintf('Saving image in "%s" format is not supported, please use one of the following extensions: "%s"', $format, implode('", "', $this->supported())));
}
$save = 'image'.$format;
$args = array(&$this->resource, $filename);
// Preserve BC until version 1.0
if (isset($options['quality']) && !isset($options['png_compression_level'])) {
$options['png_compression_level'] = round((100 - $options['quality']) * 9 / 100);
}
if (isset($options['filters']) && !isset($options['png_compression_filter'])) {
$options['png_compression_filter'] = $options['filters'];
}
$options = $this->updateSaveOptions($options);
if ($format === 'jpeg' && isset($options['jpeg_quality'])) {
$args[] = $options['jpeg_quality'];
}
if ($format === 'png') {
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');
}
$args[] = $options['png_compression_level'];
} else {
$args[] = -1; // use default level
}
if (isset($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');
}
$args[] = $options['png_compression_filter'];
}
}
if (($format === 'wbmp' || $format === 'xbm') && isset($options['foreground'])) {
$args[] = $options['foreground'];
}
$this->setExceptionHandler();
if (false === call_user_func_array($save, $args)) {
throw new RuntimeException('Save operation failed');
}
$this->resetExceptionHandler();
}
/**
* Internal
*
* Generates a GD image
*
* @param BoxInterface $size
* @param string the operation initiating the creation
*
* @return resource
*
* @throws RuntimeException
*
*/
private function createImage(BoxInterface $size, $operation)
{
$resource = imagecreatetruecolor($size->getWidth(), $size->getHeight());
if (false === $resource) {
throw new RuntimeException('Image '.$operation.' failed');
}
if (false === imagealphablending($resource, false) || false === imagesavealpha($resource, true)) {
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;
}
/**
* Internal
*
* Generates a GD color from Color instance
*
* @param ColorInterface $color
*
* @return integer A color identifier
*
* @throws RuntimeException
* @throws InvalidArgumentException
*/
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 (false === $index) {
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;
}
/**
* Internal
*
* Normalizes a given format name
*
* @param string $format
*
* @return string
*/
private function normalizeFormat($format)
{
$format = strtolower($format);
if ('jpg' === $format || 'pjpeg' === $format) {
$format = 'jpeg';
}
return $format;
}
/**
* Internal
*
* Checks whether a given format is supported by GD library
*
* @param string $format
*
* @return Boolean
*/
private function supported($format = null)
{
$formats = array('gif', 'jpeg', 'png', 'wbmp', 'xbm');
if (null === $format) {
return $formats;
}
return in_array($format, $formats);
}
private function setExceptionHandler()
{
set_error_handler(function ($errno, $errstr, $errfile, $errline) {
if (0 === error_reporting()) {
return;
}
throw new RuntimeException($errstr, $errno, new \ErrorException($errstr, 0, $errno, $errfile, $errline));
}, E_WARNING | E_NOTICE);
}
private function resetExceptionHandler()
{
restore_error_handler();
}
/**
* Internal
*
* Get the mime type based on format.
*
* @param string $format
*
* @return string mime-type
*
* @throws RuntimeException
*/
private function getMimeType($format)
{
$format = $this->normalizeFormat($format);
if (!$this->supported($format)) {
throw new RuntimeException('Invalid format');
}
static $mimeTypes = array(
'jpeg' => 'image/jpeg',
'gif' => 'image/gif',
'png' => 'image/png',
'wbmp' => 'image/vnd.wap.wbmp',
'xbm' => 'image/xbm',
);
return $mimeTypes[$format];
}
}
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