refactor: susun semula struktur folder — Laravel source ke src/

vendor/intervention/gif/src/Decoders/ImageDescriptorDecoder.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Gif\Decoders;
+
+use Intervention\Gif\Blocks\ImageDescriptor;
+use Intervention\Gif\Exceptions\DecoderException;
+use Intervention\Gif\Exceptions\InvalidArgumentException;
+
+class ImageDescriptorDecoder extends AbstractPackedBitDecoder
+{
+    /**
+     * Decode given string to current instance.
+     *
+     * @throws DecoderException
+     */
+    public function decode(): ImageDescriptor
+    {
+        $descriptor = new ImageDescriptor();
+
+        $this->nextByteOrFail(); // skip separator
+
+        $descriptor->setPosition(
+            $this->decodeMultiByte($this->nextBytesOrFail(2)),
+            $this->decodeMultiByte($this->nextBytesOrFail(2))
+        );
+
+        try {
+            $descriptor->setSize(
+                $this->decodeMultiByte($this->nextBytesOrFail(2)),
+                $this->decodeMultiByte($this->nextBytesOrFail(2))
+            );
+        } catch (InvalidArgumentException $e) {
+            throw new DecoderException('Failed to decode image size of image descriptor', previous: $e);
+        }
+
+        $packedField = $this->nextByteOrFail();
+
+        $descriptor->setLocalColorTableExistance(
+            $this->decodeLocalColorTableExistance($packedField)
+        );
+
+        $descriptor->setLocalColorTableSorted(
+            $this->decodeLocalColorTableSorted($packedField)
+        );
+
+        $descriptor->setLocalColorTableSize(
+            $this->decodeLocalColorTableSize($packedField)
+        );
+
+        $descriptor->setInterlaced(
+            $this->decodeInterlaced($packedField)
+        );
+
+        return $descriptor;
+    }
+
+    /**
+     * Decode local color table existance.
+     *
+     * @throws DecoderException
+     */
+    private function decodeLocalColorTableExistance(string $byte): bool
+    {
+        return $this->hasPackedBit($byte, 0);
+    }
+
+    /**
+     * Decode local color table sort method.
+     *
+     * @throws DecoderException
+     */
+    private function decodeLocalColorTableSorted(string $byte): bool
+    {
+        return $this->hasPackedBit($byte, 2);
+    }
+
+    /**
+     * Decode local color table size.
+     *
+     * @throws DecoderException
+     */
+    private function decodeLocalColorTableSize(string $byte): int
+    {
+        return (int) bindec($this->packedBits($byte, 5, 3));
+    }
+
+    /**
+     * Decode interlaced flag.
+     *
+     * @throws DecoderException
+     */
+    private function decodeInterlaced(string $byte): bool
+    {
+        return $this->hasPackedBit($byte, 1);
+    }
+}