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我试图打开一个现有文件，通过包含文本对其进行修改，然后将其发送给用户（渲染）。我认识到的是，字体大小仅针对文件的保存版本而变化。如果我只渲染它，字体大小将被忽略。

为什么会这样？我做错了什么？我可以对它做点什么吗？

问候，
-lony

    $this->_helper->layout->disableLayout();
    $this->_helper->viewRenderer->setNoRender();

    // fetch allready styled pdf
    $pdf = Zend_Pdf::load('img/voucher/gift_vouchers.pdf');

    // set default color and font with size
    $style = new Zend_Pdf_Style();
    $style->setFillColor(new Zend_Pdf_Color_Html('#c34827'));
    $style->setFont(Zend_Pdf_Font::fontWithName(Zend_Pdf_Font::FONT_HELVETICA), 9);

    // fetch first page
    $page = $pdf->pages[0];

    // set default style to page
    $page->setStyle($style);

    $page->drawText('To_', 72, 10);
    $page->drawText('From_', 72, 200);
    $page->drawText('For_Chrismas', 1, 100);
    $page->drawText('For_Message Lorem Ipsum isries.', 72, 520);
    $page->drawText('1231233123', 72, 520);
    $page->drawText('23/12/2010', 72, 520);

    // only for DEBUG to show difference
    $pdf->save('img/voucher/voucher-'.Zend_date::now()->getTimestamp().'.pdf');

    $this->getResponse()->setHeader('Content-type', 'application/pdf', true);
    $this->getResponse()->setHeader('Content-disposition', 'inline; filename=' . $this->_pdfName . '.pdf', true);
    $this->getResponse()->setBody($pdf->render(false));
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