141 lines
4.9 KiB
PHP
141 lines
4.9 KiB
PHP
<?php
|
|
// Start session if not already started
|
|
if (session_status() === PHP_SESSION_NONE) {
|
|
session_start();
|
|
}
|
|
|
|
// Set proper content type
|
|
header('Content-Type: application/json');
|
|
|
|
// Basic authentication check
|
|
if (!isset($_SESSION['user_id'])) {
|
|
http_response_code(403);
|
|
echo json_encode(['success' => false, 'message' => 'Authentication required.']);
|
|
exit;
|
|
}
|
|
|
|
// Check if image path is provided
|
|
if (!isset($_POST['path']) || empty($_POST['path'])) {
|
|
http_response_code(400);
|
|
echo json_encode(['success' => false, 'message' => 'Image path not provided.']);
|
|
exit;
|
|
}
|
|
|
|
$imagePath = $_POST['path'];
|
|
|
|
// Sanitize the path: remove any query string to prevent issues with realpath()
|
|
$path_parts = parse_url($imagePath);
|
|
$imagePath = $path_parts['path'];
|
|
|
|
$baseDir = realpath(__DIR__ . '/../data/images/backgrounds');
|
|
$fullPath = realpath(__DIR__ . '/../' . $imagePath);
|
|
|
|
// Security check: ensure the file is within the backgrounds directory
|
|
if (!$fullPath || strpos($fullPath, $baseDir) !== 0 || !file_exists($fullPath)) {
|
|
http_response_code(400);
|
|
echo json_encode(['success' => false, 'message' => 'Invalid or non-existent image path.']);
|
|
exit;
|
|
}
|
|
|
|
// --- Image Optimization Logic ---
|
|
$maxWidth = 1920;
|
|
$quality = 85;
|
|
|
|
try {
|
|
// Get image info
|
|
list($width, $height, $type) = getimagesize($fullPath);
|
|
|
|
// Check if image is too large for memory (more conservative estimate)
|
|
$estimatedMemory = ($width * $height * 4) + (1920 * 1080 * 4); // Rough estimate
|
|
if ($estimatedMemory > (400 * 1024 * 1024)) { // 400MB (leave some headroom)
|
|
echo json_encode(['success' => false, 'message' => 'Image too large to process safely. Please use a smaller image or reduce the image dimensions.']);
|
|
exit;
|
|
}
|
|
|
|
// Don't optimize if the image is already reasonably sized
|
|
if ($width <= $maxWidth) {
|
|
// Still, re-save JPEG to apply quality setting, which might reduce size
|
|
if ($type == IMAGETYPE_JPEG) {
|
|
$source = imagecreatefromjpeg($fullPath);
|
|
if ($source === false) {
|
|
throw new Exception('Could not load image for quality adjustment.');
|
|
}
|
|
imagejpeg($source, $fullPath, $quality);
|
|
imagedestroy($source);
|
|
echo json_encode(['success' => true, 'message' => 'Image quality adjusted, but no resize needed.']);
|
|
exit;
|
|
}
|
|
// For other types, if no resize is needed, there's nothing to do.
|
|
echo json_encode(['success' => true, 'message' => 'Image is already optimized (width is within limit).']);
|
|
exit;
|
|
}
|
|
|
|
// Continue with resizing for images wider than maxWidth
|
|
$newWidth = $maxWidth;
|
|
$newHeight = (int) (($newWidth / $width) * $height);
|
|
|
|
// Create image resource based on type
|
|
$source = false;
|
|
switch ($type) {
|
|
case IMAGETYPE_JPEG:
|
|
$source = @imagecreatefromjpeg($fullPath);
|
|
break;
|
|
case IMAGETYPE_PNG:
|
|
$source = @imagecreatefrompng($fullPath);
|
|
break;
|
|
case IMAGETYPE_GIF:
|
|
$source = @imagecreatefromgif($fullPath);
|
|
break;
|
|
case IMAGETYPE_WEBP:
|
|
$source = @imagecreatefromwebp($fullPath);
|
|
break;
|
|
default:
|
|
throw new Exception('Unsupported image type.');
|
|
}
|
|
|
|
if ($source === false) {
|
|
throw new Exception('Could not create image resource. The image may be corrupted or too large.');
|
|
}
|
|
|
|
// Create a new true color image
|
|
$thumb = imagecreatetruecolor($newWidth, $newHeight);
|
|
|
|
// Handle transparency for PNG
|
|
if ($type == IMAGETYPE_PNG) {
|
|
imagealphablending($thumb, false);
|
|
imagesavealpha($thumb, true);
|
|
$transparent = imagecolorallocatealpha($thumb, 255, 255, 255, 127);
|
|
imagefilledrectangle($thumb, 0, 0, $newWidth, $newHeight, $transparent);
|
|
}
|
|
|
|
// Resize
|
|
imagecopyresampled($thumb, $source, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
|
|
|
|
// Save the optimized image, overwriting the original
|
|
switch ($type) {
|
|
case IMAGETYPE_JPEG:
|
|
imagejpeg($thumb, $fullPath, $quality);
|
|
break;
|
|
case IMAGETYPE_PNG:
|
|
// PNG quality is 0-9. 85 quality -> level 1-2.
|
|
imagepng($thumb, $fullPath, 1);
|
|
break;
|
|
case IMAGETYPE_GIF:
|
|
imagegif($thumb, $fullPath);
|
|
break;
|
|
case IMAGETYPE_WEBP:
|
|
imagewebp($thumb, $fullPath, $quality);
|
|
break;
|
|
}
|
|
|
|
// Free up memory
|
|
imagedestroy($source);
|
|
imagedestroy($thumb);
|
|
|
|
echo json_encode(['success' => true, 'message' => 'Image optimized successfully.']);
|
|
|
|
} catch (Exception $e) {
|
|
http_response_code(500);
|
|
echo json_encode(['success' => false, 'message' => 'Error optimizing image: ' . $e->getMessage()]);
|
|
}
|