74 lines
1.7 KiB
PHP
74 lines
1.7 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Intervention\Gif\Encoders;
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use Intervention\Gif\Blocks\CommentExtension;
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use Intervention\Gif\Blocks\FrameBlock;
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use Intervention\Gif\Exceptions\EncoderException;
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use Intervention\Gif\GifDataStream;
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class GifDataStreamEncoder extends AbstractEncoder
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{
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/**
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* Create new instance
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*/
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public function __construct(GifDataStream $source)
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{
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$this->source = $source;
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}
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/**
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* Encode current source
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*
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* @throws EncoderException
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*/
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public function encode(): string
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{
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return implode('', [
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$this->source->getHeader()->encode(),
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$this->source->getLogicalScreenDescriptor()->encode(),
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$this->maybeEncodeGlobalColorTable(),
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$this->encodeFrames(),
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$this->encodeComments(),
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$this->source->getTrailer()->encode(),
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]);
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}
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protected function maybeEncodeGlobalColorTable(): string
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{
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if (!$this->source->hasGlobalColorTable()) {
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return '';
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}
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return $this->source->getGlobalColorTable()->encode();
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}
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/**
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* Encode data blocks of source
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*
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* @throws EncoderException
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*/
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protected function encodeFrames(): string
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{
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return implode('', array_map(
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fn(FrameBlock $frame): string => $frame->encode(),
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$this->source->getFrames(),
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));
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}
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/**
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* Encode comment extension blocks of source
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*
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* @throws EncoderException
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*/
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protected function encodeComments(): string
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{
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return implode('', array_map(
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fn(CommentExtension $commentExtension): string => $commentExtension->encode(),
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$this->source->getComments()
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));
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}
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}
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