尝试打开使用iText库创建的PDF时，Adobe Reader在Mac上显示错误

Question

I have created PDF using iText library with dynamic document size . Document size is depends on content. It is opening fine in windows but when trying to open in MAC its show error "message error exist on this . page acrobat may not display the page correctly. Please contact the person who created the PDF document."

I have added image in header using absolute position. When I remove this image then it working fine. I have check every pixel there is no any pixel is overlapping each others. I don't know exactly what wrong in this code.

Find my code below

    PdfContentByte cb = writer.getDirectContent();
    cb.saveState();
    try {
        //Header and Footer Setting
        float textBase = document.bottom();
        float textTop = document.top();
        String ramboAccounturl = docRoot + RamboConstants.DEFAULT_LOGO_IMAGE_PATH;
        Image ramboImage = Image.getInstance(ramboAccounturl);
        String reviewName = displayName;//"Review: " + review.getReviewName();

        //Header Horizontal Line
        cb.setLineWidth(1);
        cb.closePath();
        //Footer Horizontal Line
        float footerY = document.bottom();
        footerY += 10;
        cb.setColorStroke(BaseColor.BLACK);;
        cb.moveTo(document.left(), footerY);
        cb.lineTo(document.right(), footerY);
        cb.stroke();
        cb.setColorFill(BaseColor.BLACK);
        Image bkgImage = Image.getInstance(docRoot + RamboConstants.BACKGROUNG_IMAGE);
        cb.addImage(bkgImage, document.right() - document.rightMargin() + 35f, 0, 0, RamboConstants.PDF_LOGO_MAX_HEIGHT + 8f,
                document.left() - 20, textTop - 18f);
        cb.beginText();
        //account logo image
        account.setDirectS3Download(RamboConstants.TRUE);
        Image image = null;
        String accountLogoUrl = ramboContext.getFileManager().buildFileUrl(account, RamboConstants.DOCTYPE_LOGO_HEADER_ACCOUNT, null);
        if (accountLogoUrl != null) {
            try {
                image = Image.getInstance(new URL(accountLogoUrl));
            } catch(Exception e) {
                ramboAccounturl = docRoot + RamboConstants.DEFAULT_LOGO_WHITE_IMAGE_PATH;
                image = Image.getInstance(ramboAccounturl);
            }
        } else {
            ramboAccounturl = docRoot + RamboConstants.DEFAULT_LOGO_WHITE_IMAGE_PATH;
            image = Image.getInstance(ramboAccounturl);
        }
        image.setAbsolutePosition(document.left() - 4f, textTop - 12f);
        float width = image.getWidth() * RamboConstants.PDF_REVIEW_PIXEL_TO_USER_POINT_CONVERSION_RATE;
        float height = image.getHeight() * RamboConstants.PDF_REVIEW_PIXEL_TO_USER_POINT_CONVERSION_RATE;
        if (width > RamboConstants.PDF_LOGO_MAX_WIDTH){ // source is wider than target in proportion
            float ratio = RamboConstants.PDF_LOGO_MAX_WIDTH / width;
            width = width * ratio;
            height = height * ratio;      
        }
        if (height > RamboConstants.PDF_LOGO_MAX_HEIGHT){ 
            float ratio = RamboConstants.PDF_LOGO_MAX_HEIGHT / height;
            width = width * ratio;
            height = height * ratio;      
        } 
        image.scaleAbsoluteWidth(width);
        image.scaleAbsoluteHeight(height);
        cb.addImage(image);

        //review name
        cb.setColorFill(BaseColor.WHITE);
        cb.setFontAndSize(helv , RamboConstants.PDF_REVIEW_NAME_FONT_SIZE);
        cb.setTextMatrix(document.right() - helv.getWidthPoint(reviewName, RamboConstants.PDF_REVIEW_NAME_FONT_SIZE) - 
                40, textTop + 5);
        cb.showText(reviewName);

        cb.setColorFill(BaseColor.BLACK);
        //rambo account logo
        ramboImage.setAbsolutePosition(document.left(), textBase - 25);
        width = ramboImage.getWidth();
        height = ramboImage.getHeight();
        if (width > RamboConstants.PDF_ROBOHEAD_LOGO_MAX_WIDTH){ // source is wider than target in proportion
            float ratio = RamboConstants.PDF_ROBOHEAD_LOGO_MAX_WIDTH / width;
            width = width * ratio;
            height = height * ratio;
        }
        if (height > RamboConstants.PDF_ROBOHEAD_LOGO_MAX_HEIGHT){ 
            float ratio = RamboConstants.PDF_ROBOHEAD_LOGO_MAX_HEIGHT / height;
            width = width * ratio;
            height = height * ratio;      
        } 
        ramboImage.scaleAbsoluteWidth(width);
        ramboImage.scaleAbsoluteHeight(height);
        cb.addImage(ramboImage);
        //powered by text
        String poweredByText = ramboContext.getMessageSource().getMessage("msg_footer_powered_by", null, Locale.getDefault());
        cb.setFontAndSize(BaseFont.createFont(BaseFont.HELVETICA_BOLD, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED), 
                10);
        cb.setTextMatrix(document.left() + 70, 20);
        cb.showText(poweredByText);

        //Page number
        String text = "Page " + writer.getPageNumber() + " of ";
        cb.setFontAndSize(helv , RamboConstants.PDF_FOOTER_FONT_SIZE);
        cb.setTextMatrix(document.right() - helv.getWidthPoint(text, RamboConstants.PDF_FOOTER_FONT_SIZE) - 
                RamboConstants.PDF_FOOTER_FONT_SIZE, 20);
        cb.showText(text);
        cb.endText();
        cb.addTemplate(total, document.right() - RamboConstants.PDF_FOOTER_FONT_SIZE, 20);  

    } catch (Exception e) {
        throw new RuntimeException("Failed to add header footer to PDF page ");
    }

    cb.restoreState();

My pdf looks like this. I have added above code in onEndPage() event this code is for generate header and footer part.

Answer 1

You are adding content using PdfContentByte which means that you consider yourself as proficient in PDF. However, I see that you have the following line:

cb.beginText();

This opens a text object. Inside a text object, there are some strict rules that you need to follow. For instance: the first thing you add to the direct content after beginning a text object is an image. That's not correct, is it?

Also, you cannot have a beginText() without an endText() .

This is the most blatant error in your code. You may have other errors. While some PDF viewers may be tolerant towards people who violate the PDF specification, others are more strict.