Added Methods for zoom and disabling smart shrinking

src/main/java/io/woo/htmltopdf/HtmlToPdf.java

@@ -1,9 +1,5 @@
 package io.woo.htmltopdf;
 
-import io.woo.htmltopdf.wkhtmltopdf.WkHtmlToPdf;
-import com.sun.jna.Pointer;
-import com.sun.jna.ptr.PointerByReference;
-
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -12,9 +8,12 @@
 import java.util.Map;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
-import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import com.sun.jna.Pointer;
+import com.sun.jna.ptr.PointerByReference;
+import io.woo.htmltopdf.wkhtmltopdf.WkHtmlToPdf;
+
 public class HtmlToPdf {
 
     /**
@@ -40,6 +39,20 @@ private HtmlToPdf() {
         finishedCallbacks = new ArrayList<>();
     }
 
+    /**
+     * Disable the intelligent shrinking strategy used by WebKit that makes the pixel/dpi ratio none constant
+     */
+    public HtmlToPdf disableSmartShrinking(boolean disableSmartShrinking) {
+        return setting("disable-smart-shrinking", disableSmartShrinking);
+    }
+
+    /**
+     * Zoom factor. Default is 1. This argument is passed to wkhtmltopdf as <code>--zoom</code> argument
+     */
+    public HtmlToPdf zoom(float zoomSize) {
+        return setting("zoom", zoomSize);
+    }
+
     /**
      * The paper size of the output document.
      */
@@ -223,7 +236,7 @@ public HtmlToPdf object(HtmlToPdfObject object) {
      *         or {@code false} otherwise.
      */
     public boolean convert(String path) {
-        if (objects.size() < 1) {
+        if (objects.isEmpty()) {
             return false;
         }
         Map<String,String> settings = new HashMap<>(this.settings);