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

vendor/intervention/image/src/Drivers/Gd/Analyzers/ResolutionAnalyzer.php

@@ -0,0 +1,219 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Intervention\Image\Drivers\Gd\Analyzers;
+
+use Intervention\Image\Analyzers\ResolutionAnalyzer as GenericResolutionAnalyzer;
+use Intervention\Image\Exceptions\AnalyzerException;
+use Intervention\Image\Exceptions\StreamException;
+use Intervention\Image\Exceptions\InvalidArgumentException;
+use Intervention\Image\Exceptions\MissingDependencyException;
+use Intervention\Image\Interfaces\ImageInterface;
+use Intervention\Image\Interfaces\OriginInterface;
+use Intervention\Image\Interfaces\SpecializedInterface;
+use Intervention\Image\Resolution;
+use Intervention\Image\Traits\CanBuildStream;
+use Throwable;
+
+class ResolutionAnalyzer extends GenericResolutionAnalyzer implements SpecializedInterface
+{
+    use CanBuildStream;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @see AnalyzerInterface::analyze()
+     *
+     * @throws InvalidArgumentException
+     * @throws AnalyzerException
+     */
+    public function analyze(ImageInterface $image): mixed
+    {
+        $result = imageresolution($image->core()->native());
+
+        if (!is_array($result)) {
+            throw new AnalyzerException('Failed to read image resolution');
+        }
+
+        // GD returns 96x96 as resolution by default even if the image has no resolution.
+        // This is problematic because it is impossible to tell whether the image
+        // really has this resolution or whether it just corresponds to the default value.
+        //
+        // If GD's default resolution is returned here and the resolution is still unchanged
+        // we will make an attempt to find the resolution from origin.
+        if ($this->isGdDefaultResolution($result) && $image->core()->meta()->get('resolutionChanged') !== true) {
+            try {
+                $alternativeResoltion = $this->readResolutionFromOrigin($image->origin());
+            } catch (Throwable) {
+                $alternativeResoltion = [96, 96];
+            }
+
+            $result = $alternativeResoltion !== $result ? $alternativeResoltion : $result;
+        }
+
+        return new Resolution(...$result);
+    }
+
+    /**
+     * @param array<int|float> $resolution
+     */
+    private function isGdDefaultResolution(array $resolution): bool
+    {
+        return intval($resolution[0] ?? 0) === 96 && intval($resolution[1] ?? 0) === 96;
+    }
+
+    /**
+     * @throws AnalyzerException
+     * @throws InvalidArgumentException
+     * @throws StreamException
+     * @return array<float>
+     */
+    private function readResolutionFromOrigin(OriginInterface $origin): array
+    {
+        $handle = self::buildStreamOrFail(file_get_contents($origin->filePath()));
+
+        try {
+            try {
+                return $this->resolutionFromJfifHeader($handle);
+            } catch (Throwable) {
+                # code ...
+            }
+
+            try {
+                return $this->resolutionFromExifHeader($handle);
+            } catch (Throwable) {
+                # code ...
+            }
+
+            try {
+                return $this->resolutionFromPngPhys($handle);
+            } catch (Throwable) {
+                # code ...
+            }
+
+            throw new AnalyzerException('Unable to read resolution from path');
+        } finally {
+            fclose($handle);
+        }
+    }
+
+    /**
+     * @param resource $handle
+     * @throws AnalyzerException
+     * @return array<float>
+     */
+    private function resolutionFromJfifHeader($handle): array
+    {
+        // read first 20 bytes
+        rewind($handle);
+        $header = fread($handle, 20);
+
+        // find the JFIF segment
+        $offset = strpos($header, 'JFIF');
+        if ($offset === false) {
+            throw new AnalyzerException('Unable to read JFIF header');
+        }
+
+        // read bytes at known offsets relative to JFIF
+        $units = ord($header[$offset + 7]);
+        $x = unpack('n', substr($header, $offset + 8, 2))[1];
+        $y = unpack('n', substr($header, $offset + 10, 2))[1];
+
+        if ($units === 2) { // unit is dots per cm → convert to DPI
+            return [round($x * 2.54), round($y * 2.54)];
+        }
+
+        return [$x, $y]; // unit is DPI or no unit
+    }
+
+    /**
+     * @param resource $handle
+     * @throws MissingDependencyException
+     * @throws AnalyzerException
+     * @return array<float>
+     */
+    private function resolutionFromExifHeader($handle): array
+    {
+        if (!function_exists('exif_read_data')) {
+            throw new MissingDependencyException('Unable to read exif data');
+        }
+
+        rewind($handle);
+        $data = @exif_read_data($handle, null, true);
+
+        if ($data === false) {
+            throw new AnalyzerException('Unable to read exif data');
+        }
+
+        if (isset($data['XResolution']) && isset($data['YResolution'])) {
+            $resolution = [$data['XResolution'], $data['YResolution']];
+        }
+
+        if (isset($data['IFD0']) && isset($data['IFD0']['XResolution']) && isset($data['IFD0']['YResolution'])) {
+            $resolution = [$data['IFD0']['XResolution'], $data['IFD0']['YResolution']];
+        }
+
+        if (!isset($resolution)) {
+            throw new AnalyzerException('Unable to read exif data');
+        }
+
+        return array_map(function (mixed $value): int|float {
+            if (strpos($value, '/') === false) {
+                return $value;
+            }
+
+            $values = array_map(fn(string $value): int => intval($value), explode('/', $value));
+
+            if ($values[1] === 0) {
+                throw new AnalyzerException('Unable to read exif data, division by zero');
+            }
+
+            return $values[0] / $values[1];
+        }, $resolution);
+    }
+
+    /**
+     * @param resource $handle
+     * @throws AnalyzerException
+     * @return array<float>
+     */
+    private function resolutionFromPngPhys($handle): array
+    {
+        rewind($handle);
+        $signature = fread($handle, 8);
+
+        // no PNG content
+        if ($signature !== "\x89PNG\x0D\x0A\x1A\x0A") {
+            throw new AnalyzerException('Input must be PNG format');
+        }
+
+        $marker = '';
+
+        while (!feof($handle)) {
+            $marker = strlen($marker) < 4 ? $marker . fread($handle, 1) : substr($marker, 1) . fread($handle, 1);
+
+            // find pHYs chunk
+            if ($marker === 'pHYs') {
+                // find length
+                fseek($handle, -8, SEEK_CUR);
+                $length = fread($handle, 4);
+                $length = unpack('N', $length)[1];
+                fseek($handle, 4, SEEK_CUR);
+
+                // read data
+                $data = fread($handle, $length);
+
+                $x = unpack('N', substr($data, 0, 4))[1];
+                $y = unpack('N', substr($data, 4, 4))[1];
+
+                return [
+                    round($x * .0254),
+                    round($y * .0254),
+                ];
+            }
+        }
+
+        return [0, 0];
+    }
+}