So verwalten Sie die richtige Orientierung für das Upload -Image ⇐ Php

[Guest]

Ich verwende die GD-Bibliothek, um zwei oder mehr als zwei Bilder im Code Igniter zu kombinieren. Der Kombinationsteil funktioniert einwandfrei. Aber wenn ich ein beliebiges Bild in meinem System öffne und das Bild drehe und dann versuche, das Bild zu kombinieren, dann wird es auf die gedrehte Weise kombiniert. Das heißt, ich muss das Bild immer mit der richtigen Ausrichtung kombinieren. Wenn ein Bild nicht die richtige Ausrichtung hat, muss das Bild die richtige Ausrichtung haben und dann kombinieren. Unten ist mein Code.

Code: Select all

       private function combine_images($tmp_files, $output_path)
{
$merged_image_width = 0;
$merged_image_height = 0;
$image_resources = [];

// Load images, fix orientation, and calculate dimensions for the merged image
foreach ($tmp_files as $tmp_file) {
$temp_resource = null;

// Load the image based on its MIME type
switch (mime_content_type($tmp_file)) {
case 'image/jpeg':
$temp_resource = imagecreatefromjpeg($tmp_file);
break;
case 'image/png':
$temp_resource = imagecreatefrompng($tmp_file);
break;
default:
throw new Exception("Unsupported image type: " . mime_content_type($tmp_file));
}

// Fix orientation, if needed
$temp_resource = $this->fix_orientation_and_normalize($tmp_file, $temp_resource);

// Get dimensions after fixing the orientation
$width = imagesx($temp_resource);
$height = imagesy($temp_resource);

$image_resources[] = $temp_resource;

$merged_image_width = max($merged_image_width, $width); // Use the widest image
$merged_image_height += $height; // Total height for vertical stacking
}

// Create the merged image
$merged_image = imagecreatetruecolor($merged_image_width, $merged_image_height);
$y_offset = 0;

// Copy each image into the merged image
foreach ($image_resources as $image_resource) {
imagecopy($merged_image, $image_resource, 0, $y_offset, 0, 0, imagesx($image_resource), imagesy($image_resource));
$y_offset += imagesy($image_resource); // Increment vertical offset
imagedestroy($image_resource); // Free memory for each resource
}

// Save the merged image
$merged_image_path = $output_path . '/merged_image_' . time() . rand(10, 30) . '.jpg';
imagejpeg($merged_image, $merged_image_path, 100); // Save with maximum quality
imagedestroy($merged_image); // Free the merged image resource

return $merged_image_path;
}

private function fix_orientation_and_normalize($file_path, $image_resource)
{
$exif = @exif_read_data($file_path);

if (!empty($exif['Orientation'])) {
switch ($exif['Orientation']) {
case 3: // Rotate 180 degrees
$image_resource = imagerotate($image_resource, 180, 0);
break;
case 6: // Rotate 90 degrees clockwise
$image_resource = imagerotate($image_resource, -90, 0);
break;
case 8: // Rotate 90 degrees counter-clockwise
$image_resource = imagerotate($image_resource, 90, 0);
break;
}
}

// Normalize by resetting EXIF orientation (if you save the image later)
if (function_exists('imagejpeg')) {
$temp_path = sys_get_temp_dir() . '/temp_' . uniqid() . '.jpg';
imagejpeg($image_resource, $temp_path, 100);
$image_resource = imagecreatefromjpeg($temp_path); // Reload normalized image
unlink($temp_path); // Clean up temporary file
}

return $image_resource;
}