Version 4.7.6

system/Image/Gd.php

@@ -218,8 +218,10 @@ class _Gd extends \IPS\Image
 		{			
 			case 'gif':
 				imagealphablending( $newImage, FALSE );
+				// PHP8 fix, see https://stackoverflow.com/questions/3874533/what-could-cause-a-color-index-out-of-range-error-for-imagecolorsforindex
 				$transindex = imagecolortransparent( $this->image );
-				if( $transindex >= 0 ) 
+				$palletsize = imagecolorstotal($this->image);
+				if( $transindex >= 0 AND $transindex < $palletsize )
 				{
 					$transcol	= @imagecolorsforindex( $this->image, $transindex );
 					$transindex	= imagecolorallocatealpha( $newImage, $transcol['red'], $transcol['green'], $transcol['blue'], 127 );
@@ -292,8 +294,11 @@ class _Gd extends \IPS\Image
 		{			
 			case 'gif':
 				imagealphablending( $newImage, FALSE );
+
+				// PHP8 fix, see https://stackoverflow.com/questions/3874533/what-could-cause-a-color-index-out-of-range-error-for-imagecolorsforindex
 				$transindex = imagecolortransparent( $this->image );
-				if( $transindex >= 0 ) 
+				$palletsize = imagecolorstotal($this->image);
+				if( $transindex >= 0 AND $transindex < $palletsize )
 				{
 					$transcol	= @imagecolorsforindex( $this->image, $transindex );
 					$transindex	= imagecolorallocatealpha( $newImage, $transcol['red'], $transcol['green'], $transcol['blue'], 127 );

system/Image/Imagemagick.php

@@ -158,6 +158,35 @@ class _Imagemagick extends \IPS\Image
 		$this->setDimensions();
 	}
 
+	/**
+	 * Resize to maximum
+	 *
+	 * @param	int|NULL		$maxWidth		Max Width (in pixels) or NULL
+	 * @param	int|NULL		$maxHeight		Max Height (in pixels) or NULL
+	 * @param	bool		$retainRatio	If TRUE, the image will keep it's current width/height ratio rather than being squashed
+	 * @return	bool		Returns TRUE if it actually resized, or FALSE if it wasn't necessary
+	 */
+	public function resizeToMax( $maxWidth=NULL, $maxHeight=NULL, $retainRatio=TRUE )
+	{
+		/* If we want to strip exif, we need to process this image regardless of size */
+		if( ! \IPS\Settings::i()->imagick_strip_exif )
+		{
+			return parent::resizeToMax( $maxWidth, $maxHeight, $retainRatio );
+		}
+
+		/* If the image is smaller, let's "resize" it keeping the same dimensions, so it runs via the __toString method */
+		if( ( $maxWidth == NULL or $this->width < $maxWidth ) and ( $maxHeight == NULL or $this->height < $maxHeight ) )
+		{
+			$this->resize( $this->width, $this->height );
+
+			return true;
+		}
+		else
+		{
+			return parent::resizeToMax( $maxWidth, $maxHeight, $retainRatio );
+		}
+	}
+
 	/**
 	 * Crop to a given width and height (will attempt to downsize first)
 	 *