increase preview_max_memory and make it easier to debug

Signed-off-by: Simon L <szaimen@e.mail.de>

config/config.sample.php

@@ -1171,9 +1171,9 @@ $CONFIG = [
  * If creating the image would allocate more memory, preview generation will
  * be disabled and the default mimetype icon is shown. Set to -1 for no limit.
  *
- * Defaults to ``128`` megabytes
+ * Defaults to ``256`` megabytes
  */
-'preview_max_memory' => 128,
+'preview_max_memory' => 256,
 
 /**
  * custom path for LibreOffice/OpenOffice binary

lib/private/legacy/OC_Image.php

@@ -50,8 +50,8 @@ use OCP\IImage;
  */
 class OC_Image implements \OCP\IImage {
 
-	// Default memory limit for images to load (128 MBytes).
-	protected const DEFAULT_MEMORY_LIMIT = 128;
+	// Default memory limit for images to load (256 MBytes).
+	protected const DEFAULT_MEMORY_LIMIT = 256;
 
 	// Default quality for jpeg images
 	protected const DEFAULT_JPEG_QUALITY = 80;
@@ -585,7 +585,7 @@ class OC_Image implements \OCP\IImage {
 
 		// Assume 32 bits per pixel.
 		if ($width * $height * 4 > $memory_limit * 1024 * 1024) {
-			$this->logger->debug('Image size of ' . $width . 'x' . $height . ' would exceed allowed memory limit of ' . $memory_limit);
+			$this->logger->info('Image size of ' . $width . 'x' . $height . ' would exceed allowed memory limit of ' . $memory_limit . '. You may increase the preview_max_memory in your config.php if you need previews of this image.');
 			return false;
 		}
 

tests/lib/ImageTest.php

@@ -144,8 +144,8 @@ class ImageTest extends \Test\TestCase {
 			->willReturn(null);
 		$config->expects($this->once())
 			->method('getSystemValueInt')
-			->with('preview_max_memory', 128)
-			->willReturn(128);
+			->with('preview_max_memory', 256)
+			->willReturn(256);
 		$img = new \OC_Image(null, null, $config);
 		$img->loadFromFile(OC::$SERVERROOT.'/tests/data/testimage.jpg');
 		$raw = imagecreatefromstring(file_get_contents(OC::$SERVERROOT.'/tests/data/testimage.jpg'));