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