%PDF-
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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\Draw\DrawerInterface;
use Imagine\Exception\InvalidArgumentException;
use Imagine\Exception\RuntimeException;
use Imagine\Image\AbstractFont;
use Imagine\Image\BoxInterface;
use Imagine\Image\Palette\Color\ColorInterface;
use Imagine\Image\Palette\Color\RGB as RGBColor;
use Imagine\Image\PointInterface;
/**
* Drawer implementation using the GD library
*/
final class Drawer implements DrawerInterface
{
/**
* @var resource
*/
private $resource;
/**
* @var array
*/
private $info;
/**
* Constructs Drawer with a given gd image resource
*
* @param resource $resource
*/
public function __construct($resource)
{
$this->loadGdInfo();
$this->resource = $resource;
}
/**
* {@inheritdoc}
*/
public function arc(PointInterface $center, BoxInterface $size, $start, $end, ColorInterface $color, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw arc operation failed');
}
if (false === imagearc($this->resource, $center->getX(), $center->getY(), $size->getWidth(), $size->getHeight(), $start, $end, $this->getColor($color))) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw arc operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw arc operation failed');
}
return $this;
}
/**
* This function does not work properly because of a bug in GD
*
* {@inheritdoc}
*/
public function chord(PointInterface $center, BoxInterface $size, $start, $end, ColorInterface $color, $fill = false, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if ($fill) {
$style = IMG_ARC_CHORD;
} else {
$style = IMG_ARC_CHORD | IMG_ARC_NOFILL;
}
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw chord operation failed');
}
if (false === imagefilledarc($this->resource, $center->getX(), $center->getY(), $size->getWidth(), $size->getHeight(), $start, $end, $this->getColor($color), $style)) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw chord operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw chord operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function ellipse(PointInterface $center, BoxInterface $size, ColorInterface $color, $fill = false, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if ($fill) {
$callback = 'imagefilledellipse';
} else {
$callback = 'imageellipse';
}
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw ellipse operation failed');
}
if (false === $callback($this->resource, $center->getX(), $center->getY(), $size->getWidth(), $size->getHeight(), $this->getColor($color))) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw ellipse operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw ellipse operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function line(PointInterface $start, PointInterface $end, ColorInterface $color, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw line operation failed');
}
if (false === imageline($this->resource, $start->getX(), $start->getY(), $end->getX(), $end->getY(), $this->getColor($color))) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw line operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw line operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function pieSlice(PointInterface $center, BoxInterface $size, $start, $end, ColorInterface $color, $fill = false, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if ($fill) {
$style = IMG_ARC_EDGED;
} else {
$style = IMG_ARC_EDGED | IMG_ARC_NOFILL;
}
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw chord operation failed');
}
if (false === imagefilledarc($this->resource, $center->getX(), $center->getY(), $size->getWidth(), $size->getHeight(), $start, $end, $this->getColor($color), $style)) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw chord operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw chord operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function dot(PointInterface $position, ColorInterface $color)
{
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw point operation failed');
}
if (false === imagesetpixel($this->resource, $position->getX(), $position->getY(), $this->getColor($color))) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw point operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw point operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function polygon(array $coordinates, ColorInterface $color, $fill = false, $thickness = 1)
{
imagesetthickness($this->resource, max(1, (int) $thickness));
if (count($coordinates) < 3) {
throw new InvalidArgumentException(sprintf('A polygon must consist of at least 3 points, %d given', count($coordinates)));
}
$points = call_user_func_array('array_merge', array_map(function (PointInterface $p) {
return array($p->getX(), $p->getY());
}, $coordinates));
if ($fill) {
$callback = 'imagefilledpolygon';
} else {
$callback = 'imagepolygon';
}
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Draw polygon operation failed');
}
if (false === $callback($this->resource, $points, count($coordinates), $this->getColor($color))) {
imagealphablending($this->resource, false);
throw new RuntimeException('Draw polygon operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Draw polygon operation failed');
}
return $this;
}
/**
* {@inheritdoc}
*/
public function text($string, AbstractFont $font, PointInterface $position, $angle = 0, $width = null)
{
if (!$this->info['FreeType Support']) {
throw new RuntimeException('GD is not compiled with FreeType support');
}
$angle = -1 * $angle;
$fontsize = $font->getSize();
$fontfile = $font->getFile();
$x = $position->getX();
$y = $position->getY() + $fontsize;
if ($width !== null) {
$string = $this->wrapText($string, $font, $angle, $width);
}
if (false === imagealphablending($this->resource, true)) {
throw new RuntimeException('Font mask operation failed');
}
if (false === imagefttext($this->resource, $fontsize, $angle, $x, $y, $this->getColor($font->getColor()), $fontfile, $string)) {
imagealphablending($this->resource, false);
throw new RuntimeException('Font mask operation failed');
}
if (false === imagealphablending($this->resource, false)) {
throw new RuntimeException('Font mask operation failed');
}
return $this;
}
/**
* Internal
*
* Generates a GD color from Color instance
*
* @param ColorInterface $color
*
* @return resource
*
* @throws RuntimeException
* @throws InvalidArgumentException
*/
private function getColor(ColorInterface $color)
{
if (!$color instanceof RGBColor) {
throw new InvalidArgumentException('GD driver only supports RGB colors');
}
$gdColor = imagecolorallocatealpha($this->resource, $color->getRed(), $color->getGreen(), $color->getBlue(), (100 - $color->getAlpha()) * 127 / 100);
if (false === $gdColor) {
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 $gdColor;
}
private function loadGdInfo()
{
if (!function_exists('gd_info')) {
throw new RuntimeException('Gd not installed');
}
$this->info = gd_info();
}
/**
* Internal
*
* Fits a string into box with given width
*/
private function wrapText($string, AbstractFont $font, $angle, $width)
{
$result = '';
$words = explode(' ', $string);
foreach ($words as $word) {
$teststring = $result . ' ' . $word;
$testbox = imagettfbbox($font->getSize(), $angle, $font->getFile(), $teststring);
if ($testbox[2] > $width) {
$result .= ($result == '' ? '' : "\n") . $word;
} else {
$result .= ($result == '' ? '' : ' ') . $word;
}
}
return $result;
}
}
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