iTextSharp.text.pdf.parser.ImageRenderInfo.GetImageCTM C# (CSharp) Метод

        public Matrix GetImageCTM()
        {
            return ctm;
        }

        /**
         * Calculates intersection of the image and the render filter region in the coordinate system relative to the image.
         * 
         * @return <code>null</code> if the image is not allowed, {@link java.util.List} of 
         *         {@link com.itextpdf.text.Rectangle} objects otherwise.
         */
        protected internal virtual IList<Rectangle> GetCoveredAreas(ImageRenderInfo renderInfo) {
            Rectangle imageRect = CalcImageRect(renderInfo);
            IList<Rectangle> coveredAreas = new List<Rectangle>();

            if (imageRect == null) {
                return null;
            }

            foreach (Rectangle rectangle in rectangles) {
                Rectangle intersectionRect = Intersection(imageRect, rectangle);

                if (intersectionRect != null) {
                    // True if the image is completely covered
                    if (imageRect.Equals(intersectionRect)) {
                        return null;
                    }
                    
                    coveredAreas.Add(TransformIntersection(renderInfo.GetImageCTM(), intersectionRect));
                }
            }

            return coveredAreas;
        }