Update max-width handling for images.

Update background with zero size warning: it is not an error.

DEVSIX-1195

Author: pavel-alay

layout/src/main/java/com/itextpdf/layout/renderer/AbstractRenderer.java

@@ -492,7 +492,7 @@ public void drawBackground(DrawContext drawContext) {
             Rectangle backgroundArea = applyMargins(bBox, false);
             if (backgroundArea.getWidth() <= 0 || backgroundArea.getHeight() <= 0) {
                 Logger logger = LoggerFactory.getLogger(AbstractRenderer.class);
-                logger.error(MessageFormatUtil.format(LogMessageConstant.RECTANGLE_HAS_NEGATIVE_OR_ZERO_SIZES, "background"));
+                logger.warn(MessageFormatUtil.format(LogMessageConstant.RECTANGLE_HAS_NEGATIVE_OR_ZERO_SIZES, "background"));
                 return;
             }
             boolean backgroundAreaIsClipped = false;
@@ -517,7 +517,7 @@ public void drawBackground(DrawContext drawContext) {
                         backgroundImage.getImage().getWidth(), backgroundImage.getImage().getHeight());
                 if (imageRectangle.getWidth() <= 0 || imageRectangle.getHeight() <= 0) {
                     Logger logger = LoggerFactory.getLogger(AbstractRenderer.class);
-                    logger.error(MessageFormatUtil.format(LogMessageConstant.RECTANGLE_HAS_NEGATIVE_OR_ZERO_SIZES, "background-image"));
+                    logger.warn(MessageFormatUtil.format(LogMessageConstant.RECTANGLE_HAS_NEGATIVE_OR_ZERO_SIZES, "background-image"));
                     return;
                 }
                 applyBorderBox(backgroundArea, true);

layout/src/main/java/com/itextpdf/layout/renderer/ImageRenderer.java

@@ -106,7 +106,7 @@ public ImageRenderer(Image image) {
     public LayoutResult layout(LayoutContext layoutContext) {
         LayoutArea area = layoutContext.getArea().clone();
         Rectangle layoutBox = area.getBBox().clone();
-        Float retrievedWidth = retrieveWidth(layoutBox.getWidth());
+        Float retrievedWidth = hasProperty(Property.WIDTH) ? retrieveWidth(layoutBox.getWidth()) : null;
 
         List<Rectangle> floatRendererAreas = layoutContext.getFloatRendererAreas();
         float clearHeightCorrection = FloatingHelper.calculateClearHeightCorrection(this, floatRendererAreas, layoutBox);