pdfbox/src/main/java/org/apache/pdfbox/pdmodel/interactive/annotation/handlers/PDStrikeoutAppearanceHandler.java [50:118]:
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        PDRectangle rect = annotation.getRectangle();
        if (rect == null)
        {
            return;
        }
        float[] pathsArray = annotation.getQuadPoints();
        if (pathsArray == null)
        {
            return;
        }
        AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
        PDColor color = annotation.getColor();
        if (color == null || color.getComponents().length == 0)
        {
            return;
        }
        if (Float.compare(ab.width, 0) == 0)
        {
            // value found in adobe reader
            ab.width = 1.5f;
        }

        // Adjust rectangle even if not empty, see PLPDF.com-MarkupAnnotations.pdf
        //TODO in a class structure this should be overridable
        // this is similar to polyline but different data type
        float minX = Float.MAX_VALUE;
        float minY = Float.MAX_VALUE;
        float maxX = Float.MIN_VALUE;
        float maxY = Float.MIN_VALUE;
        for (int i = 0; i < pathsArray.length / 2; ++i)
        {
            float x = pathsArray[i * 2];
            float y = pathsArray[i * 2 + 1];
            minX = Math.min(minX, x);
            minY = Math.min(minY, y);
            maxX = Math.max(maxX, x);
            maxY = Math.max(maxY, y);
        }
        rect.setLowerLeftX(Math.min(minX - ab.width / 2, rect.getLowerLeftX()));
        rect.setLowerLeftY(Math.min(minY - ab.width / 2, rect.getLowerLeftY()));
        rect.setUpperRightX(Math.max(maxX + ab.width / 2, rect.getUpperRightX()));
        rect.setUpperRightY(Math.max(maxY + ab.width / 2, rect.getUpperRightY()));
        annotation.setRectangle(rect);

        try (PDAppearanceContentStream cs = getNormalAppearanceAsContentStream())
        {
            setOpacity(cs, annotation.getConstantOpacity());

            cs.setStrokingColor(color);
            if (ab.dashArray != null)
            {
                cs.setLineDashPattern(ab.dashArray, 0);
            }
            cs.setLineWidth(ab.width);

            // spec is incorrect
            // https://stackoverflow.com/questions/9855814/pdf-spec-vs-acrobat-creation-quadpoints
            for (int i = 0; i < pathsArray.length / 8; ++i)
            {
                // get mid point between bounds, subtract the line width to approximate what Adobe is doing
                // See e.g. CTAN-example-Annotations.pdf and PLPDF.com-MarkupAnnotations.pdf
                // and https://bugs.ghostscript.com/show_bug.cgi?id=693664
                // do the math for diagonal annotations with this weird old trick:
                // https://stackoverflow.com/questions/7740507/extend-a-line-segment-a-specific-distance
                float len0 = (float) (Math.sqrt(Math.pow(pathsArray[i * 8] - pathsArray[i * 8 + 4], 2) + 
                                      Math.pow(pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5], 2)));
                float x0 = pathsArray[i * 8 + 4];
                float y0 = pathsArray[i * 8 + 5];
                if (Float.compare(len0, 0) != 0)
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pdfbox/src/main/java/org/apache/pdfbox/pdmodel/interactive/annotation/handlers/PDUnderlineAppearanceHandler.java [50:117]:
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        PDRectangle rect = annotation.getRectangle();
        if (rect == null)
        {
            return;
        }
        float[] pathsArray = annotation.getQuadPoints();
        if (pathsArray == null)
        {
            return;
        }
        AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
        PDColor color = annotation.getColor();
        if (color == null || color.getComponents().length == 0)
        {
            return;
        }
        if (Float.compare(ab.width, 0) == 0)
        {
            // value found in adobe reader
            ab.width = 1.5f;
        }

        // Adjust rectangle even if not empty, see PLPDF.com-MarkupAnnotations.pdf
        //TODO in a class structure this should be overridable
        // this is similar to polyline but different data type
        // all coordinates (unlike painting) are used because I'm lazy
        float minX = Float.MAX_VALUE;
        float minY = Float.MAX_VALUE;
        float maxX = Float.MIN_VALUE;
        float maxY = Float.MIN_VALUE;
        for (int i = 0; i < pathsArray.length / 2; ++i)
        {
            float x = pathsArray[i * 2];
            float y = pathsArray[i * 2 + 1];
            minX = Math.min(minX, x);
            minY = Math.min(minY, y);
            maxX = Math.max(maxX, x);
            maxY = Math.max(maxY, y);
        }
        rect.setLowerLeftX(Math.min(minX - ab.width / 2, rect.getLowerLeftX()));
        rect.setLowerLeftY(Math.min(minY - ab.width / 2, rect.getLowerLeftY()));
        rect.setUpperRightX(Math.max(maxX + ab.width / 2, rect.getUpperRightX()));
        rect.setUpperRightY(Math.max(maxY + ab.width / 2, rect.getUpperRightY()));
        annotation.setRectangle(rect);

        try (PDAppearanceContentStream cs = getNormalAppearanceAsContentStream())
        {
            setOpacity(cs, annotation.getConstantOpacity());

            cs.setStrokingColor(color);
            if (ab.dashArray != null)
            {
                cs.setLineDashPattern(ab.dashArray, 0);
            }
            cs.setLineWidth(ab.width);

            // spec is incorrect
            // https://stackoverflow.com/questions/9855814/pdf-spec-vs-acrobat-creation-quadpoints
            for (int i = 0; i < pathsArray.length / 8; ++i)
            {
                // Adobe doesn't use the lower coordinate for the line, it uses lower + delta / 7.
                // do the math for diagonal annotations with this weird old trick:
                // https://stackoverflow.com/questions/7740507/extend-a-line-segment-a-specific-distance
                float len0 = (float) (Math.sqrt(Math.pow(pathsArray[i * 8] - pathsArray[i * 8 + 4], 2) + 
                                      Math.pow(pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5], 2)));
                float x0 = pathsArray[i * 8 + 4];
                float y0 = pathsArray[i * 8 + 5];
                if (Float.compare(len0, 0) != 0)
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