Examples with PDAppearanceContentStream com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream used on opensource projects

Example 11 with PDAppearanceContentStream

use of com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream in project PdfBox-Android by TomRoush.

the class PDLineAppearanceHandler method generateNormalAppearance.

@Override
public void generateNormalAppearance() {
    PDAnnotationLine annotation = (PDAnnotationLine) getAnnotation();
    PDRectangle rect = annotation.getRectangle();
    float[] pathsArray = annotation.getLine();
    if (pathsArray == null) {
        return;
    }
    AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
    PDColor color = annotation.getColor();
    if (color == null || color.getComponents().length == 0) {
        return;
    }
    float ll = annotation.getLeaderLineLength();
    float lle = annotation.getLeaderLineExtensionLength();
    float llo = annotation.getLeaderLineOffsetLength();
    // Adjust rectangle even if not empty, see PLPDF.com-MarkupAnnotations.pdf
    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);
    }
    // Leader lines
    if (ll < 0) {
        // /LLO and /LLE go in the same direction as /LL
        llo = -llo;
        lle = -lle;
    }
    // observed with diagonal line of AnnotationSample.Standard.pdf
    // for line endings, very small widths must be treated as size 1.
    // However the border of the line ending shapes is not drawn.
    float lineEndingSize = (ab.width < 1e-5) ? 1 : ab.width;
    // add/subtract with, font height, and arrows
    // arrow length is 9 * width at about 30° => 10 * width seems to be enough
    // but need to consider /LL, /LLE and /LLO too
    // TODO find better way to calculate padding
    rect.setLowerLeftX(Math.min(minX - Math.max(lineEndingSize * 10, Math.abs(llo + ll + lle)), rect.getLowerLeftX()));
    rect.setLowerLeftY(Math.min(minY - Math.max(lineEndingSize * 10, Math.abs(llo + ll + lle)), rect.getLowerLeftY()));
    rect.setUpperRightX(Math.max(maxX + Math.max(lineEndingSize * 10, Math.abs(llo + ll + lle)), rect.getUpperRightX()));
    rect.setUpperRightY(Math.max(maxY + Math.max(lineEndingSize * 10, Math.abs(llo + ll + lle)), rect.getUpperRightY()));
    annotation.setRectangle(rect);
    PDAppearanceContentStream cs = null;
    try {
        cs = getNormalAppearanceAsContentStream();
        setOpacity(cs, annotation.getConstantOpacity());
        // Tested with Adobe Reader:
        // text is written first (TODO)
        // width 0 is used by Adobe as such (but results in a visible line in rendering)
        // empty color array results in an invisible line ("n" operator) but the rest is visible
        // empty content is like no caption
        boolean hasStroke = cs.setStrokingColorOnDemand(color);
        if (ab.dashArray != null) {
            cs.setLineDashPattern(ab.dashArray, 0);
        }
        cs.setLineWidth(ab.width);
        float x1 = pathsArray[0];
        float y1 = pathsArray[1];
        float x2 = pathsArray[2];
        float y2 = pathsArray[3];
        // if there are leader lines, then the /L coordinates represent
        // the endpoints of the leader lines rather than the endpoints of the line itself.
        // so for us, llo + ll is the vertical offset for the line.
        float y = llo + ll;
        String contents = annotation.getContents();
        if (contents == null) {
            contents = "";
        }
        cs.saveGraphicsState();
        double angle = Math.atan2(y2 - y1, x2 - x1);
        cs.transform(Matrix.getRotateInstance(angle, x1, y1));
        float lineLength = (float) Math.sqrt(((x2 - x1) * (x2 - x1)) + ((y2 - y1) * (y2 - y1)));
        // Leader lines
        cs.moveTo(0, llo);
        cs.lineTo(0, llo + ll + lle);
        cs.moveTo(lineLength, llo);
        cs.lineTo(lineLength, llo + ll + lle);
        if (annotation.getCaption() && !contents.isEmpty()) {
            // Note that Adobe places the text as a caption even if /CP is not set
            // when the text is so long that it would cross arrows, but we ignore this for now
            // and stick to the specification.
            PDType1Font font = PDType1Font.HELVETICA;
            // TODO: support newlines!!!!!
            // see https://www.pdfill.com/example/pdf_commenting_new.pdf
            float contentLength = 0;
            try {
                contentLength = font.getStringWidth(annotation.getContents()) / 1000 * FONT_SIZE;
            // TODO How to decide the size of the font?
            // 9 seems to be standard, but if the text doesn't fit, a scaling is done
            // see AnnotationSample.Standard.pdf, diagonal line
            } catch (IllegalArgumentException ex) {
                // Adobe Reader displays placeholders instead
                Log.e("PdfBox-Android", "line text '" + annotation.getContents() + "' can't be shown", ex);
            }
            float xOffset = (lineLength - contentLength) / 2;
            float yOffset;
            String captionPositioning = annotation.getCaptionPositioning();
            // that's the easiest way to calculate the positions for the line before and after inline caption
            if (SHORT_STYLES.contains(annotation.getStartPointEndingStyle())) {
                cs.moveTo(lineEndingSize, y);
            } else {
                cs.moveTo(0, y);
            }
            if ("Top".equals(captionPositioning)) {
                // this arbitrary number is from Adobe
                yOffset = 1.908f;
            } else {
                // Inline
                // this arbitrary number is from Adobe
                yOffset = -2.6f;
                cs.lineTo(xOffset - lineEndingSize, y);
                cs.moveTo(lineLength - xOffset + lineEndingSize, y);
            }
            if (SHORT_STYLES.contains(annotation.getEndPointEndingStyle())) {
                cs.lineTo(lineLength - lineEndingSize, y);
            } else {
                cs.lineTo(lineLength, y);
            }
            cs.drawShape(lineEndingSize, hasStroke, false);
            // /CO entry (caption offset)
            float captionHorizontalOffset = annotation.getCaptionHorizontalOffset();
            float captionVerticalOffset = annotation.getCaptionVerticalOffset();
            // check contentLength so we don't show if there was trouble before
            if (contentLength > 0) {
                cs.beginText();
                cs.setFont(font, FONT_SIZE);
                cs.newLineAtOffset(xOffset + captionHorizontalOffset, y + yOffset + captionVerticalOffset);
                cs.showText(annotation.getContents());
                cs.endText();
            }
            if (Float.compare(captionVerticalOffset, 0) != 0) {
                // Adobe paints vertical bar to the caption
                cs.moveTo(0 + lineLength / 2, y);
                cs.lineTo(0 + lineLength / 2, y + captionVerticalOffset);
                cs.drawShape(lineEndingSize, hasStroke, false);
            }
        } else {
            if (SHORT_STYLES.contains(annotation.getStartPointEndingStyle())) {
                cs.moveTo(lineEndingSize, y);
            } else {
                cs.moveTo(0, y);
            }
            if (SHORT_STYLES.contains(annotation.getEndPointEndingStyle())) {
                cs.lineTo(lineLength - lineEndingSize, y);
            } else {
                cs.lineTo(lineLength, y);
            }
            cs.drawShape(lineEndingSize, hasStroke, false);
        }
        cs.restoreGraphicsState();
        // paint the styles here and not before showing the text, or the text would appear
        // with the interior color
        boolean hasBackground = cs.setNonStrokingColorOnDemand(annotation.getInteriorColor());
        // is not drawn.
        if (ab.width < 1e-5) {
            hasStroke = false;
        }
        // check for LE_NONE only needed to avoid q cm Q for that case
        if (!LE_NONE.equals(annotation.getStartPointEndingStyle())) {
            cs.saveGraphicsState();
            if (ANGLED_STYLES.contains(annotation.getStartPointEndingStyle())) {
                cs.transform(Matrix.getRotateInstance(angle, x1, y1));
                drawStyle(annotation.getStartPointEndingStyle(), cs, 0, y, lineEndingSize, hasStroke, hasBackground, false);
            } else {
                // Support of non-angled styles is more difficult than in the other handlers
                // because the lines do not always go from (x1,y1) to (x2,y2) due to the leader lines
                // when the "y" value above is not 0.
                // We use the angle we already know and the distance y to translate to the new coordinate.
                float xx1 = x1 - (float) (y * Math.sin(angle));
                float yy1 = y1 + (float) (y * Math.cos(angle));
                drawStyle(annotation.getStartPointEndingStyle(), cs, xx1, yy1, lineEndingSize, hasStroke, hasBackground, false);
            }
            cs.restoreGraphicsState();
        }
        // check for LE_NONE only needed to avoid q cm Q for that case
        if (!LE_NONE.equals(annotation.getEndPointEndingStyle())) {
            // save / restore not needed because it's the last one
            if (ANGLED_STYLES.contains(annotation.getEndPointEndingStyle())) {
                cs.transform(Matrix.getRotateInstance(angle, x2, y2));
                drawStyle(annotation.getEndPointEndingStyle(), cs, 0, y, lineEndingSize, hasStroke, hasBackground, true);
            } else {
                // Support of non-angled styles is more difficult than in the other handlers
                // because the lines do not always go from (x1,y1) to (x2,y2) due to the leader lines
                // when the "y" value above is not 0.
                // We use the angle we already know and the distance y to translate to the new coordinate.
                float xx2 = x2 - (float) (y * Math.sin(angle));
                float yy2 = y2 + (float) (y * Math.cos(angle));
                drawStyle(annotation.getEndPointEndingStyle(), cs, xx2, yy2, lineEndingSize, hasStroke, hasBackground, true);
            }
        }
    } catch (IOException ex) {
        Log.e("PdfBox-Android", ex.getMessage(), ex);
    } finally {
        IOUtils.closeQuietly(cs);
    }
}

Example 12 with PDAppearanceContentStream

use of com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream in project PdfBox-Android by TomRoush.

the class PDLinkAppearanceHandler method generateNormalAppearance.

@Override
public void generateNormalAppearance() {
    PDAnnotationLink annotation = (PDAnnotationLink) getAnnotation();
    if (annotation.getRectangle() == null) {
        // 660402-p1-AnnotationEmptyRect.pdf has /Rect entry with 0 elements
        return;
    }
    // Adobe doesn't generate an appearance for a link annotation
    float lineWidth = getLineWidth();
    PDAppearanceContentStream contentStream = null;
    try {
        contentStream = getNormalAppearanceAsContentStream();
        PDColor color = annotation.getColor();
        if (color == null) {
            // spec is unclear, but black is what Adobe does
            color = new PDColor(new float[] { 0 }, PDDeviceGray.INSTANCE);
        }
        boolean hasStroke = contentStream.setStrokingColorOnDemand(color);
        contentStream.setBorderLine(lineWidth, annotation.getBorderStyle(), annotation.getBorder());
        // Acrobat applies a padding to each side of the bbox so the line is completely within
        // the bbox.
        PDRectangle borderEdge = getPaddedRectangle(getRectangle(), lineWidth / 2);
        float[] pathsArray = annotation.getQuadPoints();
        if (pathsArray != null) {
            // QuadPoints shall be ignored if any coordinate in the array lies outside
            // the region specified by Rect.
            PDRectangle rect = annotation.getRectangle();
            for (int i = 0; i < pathsArray.length / 2; ++i) {
                if (!rect.contains(pathsArray[i * 2], pathsArray[i * 2 + 1])) {
                    Log.w("PdfBox-Android", "At least one /QuadPoints entry (" + pathsArray[i * 2] + ";" + pathsArray[i * 2 + 1] + ") is outside of rectangle, " + rect + ", /QuadPoints are ignored and /Rect is used instead");
                    pathsArray = null;
                    break;
                }
            }
        }
        if (pathsArray == null) {
            // Convert rectangle coordinates as if it was a /QuadPoints entry
            pathsArray = new float[8];
            pathsArray[0] = borderEdge.getLowerLeftX();
            pathsArray[1] = borderEdge.getLowerLeftY();
            pathsArray[2] = borderEdge.getUpperRightX();
            pathsArray[3] = borderEdge.getLowerLeftY();
            pathsArray[4] = borderEdge.getUpperRightX();
            pathsArray[5] = borderEdge.getUpperRightY();
            pathsArray[6] = borderEdge.getLowerLeftX();
            pathsArray[7] = borderEdge.getUpperRightY();
        }
        int of = 0;
        while (of + 7 < pathsArray.length) {
            if (annotation.getBorderStyle() != null && annotation.getBorderStyle().getStyle().equals(PDBorderStyleDictionary.STYLE_UNDERLINE)) {
                contentStream.moveTo(pathsArray[of], pathsArray[of + 1]);
                contentStream.lineTo(pathsArray[of + 2], pathsArray[of + 3]);
            } else {
                contentStream.moveTo(pathsArray[of], pathsArray[of + 1]);
                contentStream.lineTo(pathsArray[of + 2], pathsArray[of + 3]);
                contentStream.lineTo(pathsArray[of + 4], pathsArray[of + 5]);
                contentStream.lineTo(pathsArray[of + 6], pathsArray[of + 7]);
                contentStream.closePath();
            }
            of += 8;
        }
        contentStream.drawShape(lineWidth, hasStroke, false);
    } catch (IOException e) {
        Log.e("PdfBox-Android", e.getMessage(), e);
    } finally {
        IOUtils.closeQuietly(contentStream);
    }
}

Example 13 with PDAppearanceContentStream

use of com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream in project PdfBox-Android by TomRoush.

the class PDPolylineAppearanceHandler method generateNormalAppearance.

@Override
public void generateNormalAppearance() {
    PDAnnotationMarkup annotation = (PDAnnotationMarkup) getAnnotation();
    PDRectangle rect = annotation.getRectangle();
    float[] pathsArray = annotation.getVertices();
    if (pathsArray == null || pathsArray.length < 4) {
        return;
    }
    AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
    PDColor color = annotation.getColor();
    if (color == null || color.getComponents().length == 0 || Float.compare(ab.width, 0) == 0) {
        return;
    }
    // Adjust rectangle even if not empty
    // CTAN-example-Annotations.pdf and pdf_commenting_new.pdf p11
    // TODO in a class structure this should be overridable
    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);
    }
    // arrow length is 9 * width at about 30° => 10 * width seems to be enough
    rect.setLowerLeftX(Math.min(minX - ab.width * 10, rect.getLowerLeftX()));
    rect.setLowerLeftY(Math.min(minY - ab.width * 10, rect.getLowerLeftY()));
    rect.setUpperRightX(Math.max(maxX + ab.width * 10, rect.getUpperRightX()));
    rect.setUpperRightY(Math.max(maxY + ab.width * 10, rect.getUpperRightY()));
    annotation.setRectangle(rect);
    PDAppearanceContentStream cs = null;
    try {
        cs = getNormalAppearanceAsContentStream();
        boolean hasBackground = cs.setNonStrokingColorOnDemand(annotation.getInteriorColor());
        setOpacity(cs, annotation.getConstantOpacity());
        boolean hasStroke = cs.setStrokingColorOnDemand(color);
        if (ab.dashArray != null) {
            cs.setLineDashPattern(ab.dashArray, 0);
        }
        cs.setLineWidth(ab.width);
        for (int i = 0; i < pathsArray.length / 2; ++i) {
            float x = pathsArray[i * 2];
            float y = pathsArray[i * 2 + 1];
            if (i == 0) {
                if (SHORT_STYLES.contains(annotation.getStartPointEndingStyle())) {
                    // modify coordinate to shorten the segment
                    // https://stackoverflow.com/questions/7740507/extend-a-line-segment-a-specific-distance
                    float x1 = pathsArray[2];
                    float y1 = pathsArray[3];
                    float len = (float) (Math.sqrt(Math.pow(x - x1, 2) + Math.pow(y - y1, 2)));
                    if (Float.compare(len, 0) != 0) {
                        x += (x1 - x) / len * ab.width;
                        y += (y1 - y) / len * ab.width;
                    }
                }
                cs.moveTo(x, y);
            } else {
                if (i == pathsArray.length / 2 - 1 && SHORT_STYLES.contains(annotation.getEndPointEndingStyle())) {
                    // modify coordinate to shorten the segment
                    // https://stackoverflow.com/questions/7740507/extend-a-line-segment-a-specific-distance
                    float x0 = pathsArray[pathsArray.length - 4];
                    float y0 = pathsArray[pathsArray.length - 3];
                    float len = (float) (Math.sqrt(Math.pow(x0 - x, 2) + Math.pow(y0 - y, 2)));
                    if (Float.compare(len, 0) != 0) {
                        x -= (x - x0) / len * ab.width;
                        y -= (y - y0) / len * ab.width;
                    }
                }
                cs.lineTo(x, y);
            }
        }
        cs.stroke();
        // paint the styles here and after polyline draw, to avoid line crossing a filled shape
        if (!LE_NONE.equals(annotation.getStartPointEndingStyle())) {
            // check only needed to avoid q cm Q if LE_NONE
            float x2 = pathsArray[2];
            float y2 = pathsArray[3];
            float x1 = pathsArray[0];
            float y1 = pathsArray[1];
            cs.saveGraphicsState();
            if (ANGLED_STYLES.contains(annotation.getStartPointEndingStyle())) {
                double angle = Math.atan2(y2 - y1, x2 - x1);
                cs.transform(Matrix.getRotateInstance(angle, x1, y1));
            } else {
                cs.transform(Matrix.getTranslateInstance(x1, y1));
            }
            drawStyle(annotation.getStartPointEndingStyle(), cs, 0, 0, ab.width, hasStroke, hasBackground, false);
            cs.restoreGraphicsState();
        }
        if (!LE_NONE.equals(annotation.getEndPointEndingStyle())) {
            // check only needed to avoid q cm Q if LE_NONE
            float x1 = pathsArray[pathsArray.length - 4];
            float y1 = pathsArray[pathsArray.length - 3];
            float x2 = pathsArray[pathsArray.length - 2];
            float y2 = pathsArray[pathsArray.length - 1];
            // save / restore not needed because it's the last one
            if (ANGLED_STYLES.contains(annotation.getEndPointEndingStyle())) {
                double angle = Math.atan2(y2 - y1, x2 - x1);
                cs.transform(Matrix.getRotateInstance(angle, x2, y2));
            } else {
                cs.transform(Matrix.getTranslateInstance(x2, y2));
            }
            drawStyle(annotation.getEndPointEndingStyle(), cs, 0, 0, ab.width, hasStroke, hasBackground, true);
        }
    } catch (IOException ex) {
        Log.e("PdfBox-Android", ex.getMessage(), ex);
    } finally {
        IOUtils.closeQuietly(cs);
    }
}

Example 14 with PDAppearanceContentStream

use of com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream in project PdfBox-Android by TomRoush.

the class PDSquareAppearanceHandler method generateNormalAppearance.

@Override
public void generateNormalAppearance() {
    float lineWidth = getLineWidth();
    PDAnnotationSquareCircle annotation = (PDAnnotationSquareCircle) getAnnotation();
    PDAppearanceContentStream contentStream = null;
    try {
        contentStream = getNormalAppearanceAsContentStream();
        boolean hasStroke = contentStream.setStrokingColorOnDemand(getColor());
        boolean hasBackground = contentStream.setNonStrokingColorOnDemand(annotation.getInteriorColor());
        setOpacity(contentStream, annotation.getConstantOpacity());
        contentStream.setBorderLine(lineWidth, annotation.getBorderStyle(), annotation.getBorder());
        PDBorderEffectDictionary borderEffect = annotation.getBorderEffect();
        if (borderEffect != null && borderEffect.getStyle().equals(PDBorderEffectDictionary.STYLE_CLOUDY)) {
            CloudyBorder cloudyBorder = new CloudyBorder(contentStream, borderEffect.getIntensity(), lineWidth, getRectangle());
            cloudyBorder.createCloudyRectangle(annotation.getRectDifference());
            annotation.setRectangle(cloudyBorder.getRectangle());
            annotation.setRectDifference(cloudyBorder.getRectDifference());
            PDAppearanceStream appearanceStream = annotation.getNormalAppearanceStream();
            appearanceStream.setBBox(cloudyBorder.getBBox());
            appearanceStream.setMatrix(cloudyBorder.getMatrix());
        } else {
            PDRectangle borderBox = handleBorderBox(annotation, lineWidth);
            contentStream.addRect(borderBox.getLowerLeftX(), borderBox.getLowerLeftY(), borderBox.getWidth(), borderBox.getHeight());
        }
        contentStream.drawShape(lineWidth, hasStroke, hasBackground);
    } catch (IOException e) {
        Log.e("PdfBox-Android", e.getMessage(), e);
    } finally {
        IOUtils.closeQuietly(contentStream);
    }
}

Example 15 with PDAppearanceContentStream

use of com.tom_roush.pdfbox.pdmodel.PDAppearanceContentStream in project PdfBox-Android by TomRoush.

the class PDUnderlineAppearanceHandler method generateNormalAppearance.

@Override
public void generateNormalAppearance() {
    PDAnnotationTextMarkup annotation = (PDAnnotationTextMarkup) getAnnotation();
    PDRectangle rect = annotation.getRectangle();
    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);
    PDAppearanceContentStream cs = null;
    try {
        cs = getNormalAppearanceAsContentStream();
        setOpacity(cs, annotation.getConstantOpacity());
        cs.setStrokingColor(color);
        if (ab.dashArray != null) {
            cs.setLineDashPattern(ab.dashArray, 0);
        }
        cs.setLineWidth(ab.width);
        // 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) {
                // only if both coordinates are not identical to avoid divide by zero
                x0 += (pathsArray[i * 8] - pathsArray[i * 8 + 4]) / len0 * len0 / 7;
                y0 += (pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5]) / len0 * (len0 / 7);
            }
            float len1 = (float) (Math.sqrt(Math.pow(pathsArray[i * 8 + 2] - pathsArray[i * 8 + 6], 2) + Math.pow(pathsArray[i * 8 + 3] - pathsArray[i * 8 + 7], 2)));
            float x1 = pathsArray[i * 8 + 6];
            float y1 = pathsArray[i * 8 + 7];
            if (Float.compare(len1, 0) != 0) {
                // only if both coordinates are not identical to avoid divide by zero
                x1 += (pathsArray[i * 8 + 2] - pathsArray[i * 8 + 6]) / len1 * len1 / 7;
                y1 += (pathsArray[i * 8 + 3] - pathsArray[i * 8 + 7]) / len1 * len1 / 7;
            }
            cs.moveTo(x0, y0);
            cs.lineTo(x1, y1);
        }
        cs.stroke();
    } catch (IOException ex) {
        Log.e("PdfBox-Android", ex.getMessage(), ex);
    } finally {
        IOUtils.closeQuietly(cs);
    }
}