Right now I'm using the latest ABC PDF version, and use the Gecko rendering engine. However, I notice that there are small differences between the way Firefox renders the HTML I'm adding to my PDF, and the way ABC PDF interprets the HTML. I was wondering if there is anything that can be done against this?
I'm asking about Firefox specifically because I thought that browser used the same Gecko rendering engine as ABCPDF did, so I thought it would be 100% the same.
Does anyone know about this? Couldn't find much about this on the internet, though I do admit that I find it hard to come up with the correct search terms.
By default ABCpdf will use the 'print' css media type whereas Firefox will be using 'screen', this can be changed by setting the media property.
var doc = new Doc()
doc.HtmlOptions.Media = MediaType.Screen
If the differences are more subtle it may be worth taking a look at engine configuration.
It is important to note the Gecko engine used in ABCpdf is independent from the engine used in any local Firefox installation, it should be assumed that it will be different in both version and configuration.
I am using Century Gothic font in my HTML and then converting it in to PDF. It works perfectly on my mac, but on my Slackware 14.1 server, when I convert the HTMl in to the PDF, the font is not rendered as smoothly as it should be.
I read several ways to include non-standard fonts in the HTML, as #font-face, or adding the entire font in the CSS file as an encoded font and both these methods worked for me in the HTML. The HTML is rendered perfectly in the browser, it's the PDF which is not getting a correct Century Gothic. Any help is highly appreciated.
Thank you
I did some research too and it seems that this is a known bug with qt-webkit.
See the issue documentation here:
https://github.com/wkhtmltopdf/wkhtmltopdf/issues/2193
Sorry to not have better news for you. Maybe just try with a supported font that's close enough to what you like it to look?
I am creating a pdf document (via ColdFusion), but when I preview the rendered pdf in Firefox, I get the number "4" where my checkmarks are supposed to be (see photo below). When I preview the exact same pdf in Chrome or IE, I see the checkmark, and it all works perfectly!
I am pre-populating the pdf form fields (via ColdFusion session variables), and then rendering the pdf using the following markup:
<cfpdfform source="82040.pdf" action="populate">
<cfpdfformparam name="org" value="">
</cfpdfform>
Here is the resulting pdf form in Internet Explorer:
Note how the checkmark is rendered properly:
Here is the same form previewed in FireFox:
Note how the the checkbox has a "4" instead of a checkmark:
Any help would be greatly appreciated!
It is a bug with Firefox's PDF Viewer. Currently, there is no fix. As radiovisual's post points out, the bug in the underlying library (pdf.js) was supposedly fixed. However, there is still the issue of Mozilla updating the older version baked into Firefox (which is what most folks are using). Currently, that bug is still outstanding.
Probably the best you can do is to return the pdf as an "attachment", rather than "inline", so the browser prompts them to "open/save" the file. If the user opts to "open" the pdf, it should open with their default program instead. (Adobe Reader is the default for most users).
<cfheader name="Content-Disposition" value="attachment; filename=fileName.pdf">
<cfcontent type="application/pdf" .../>
Update:
This bug was apparently addressed already, as pointed out via the project's github repo: the bug was supposedly fixed during this commit. So if you are still experiencing problems, it either means:
You are using an outdated version of the pdf.js library,
Or, the problem has been re-introduced into the library.
So to start things off, you will want to make sure that you are using the most up-to-date version of the pdf.js library. If you are still experiencing problems, even with the most up-to-date version, then the problem is still within the embedded pdf document viewer, and there aren't too many things you can do to fix this until the project maintainer's finally fix the problem.
The issue you are experiencing (the reason why you are seeing a "4" where there should be a checkmark, is because the pdf.js library is using a special symbol font to render the checkmarks, but in problematic versions of firefox's embedded pdf-viewer the symbol font isn't rendering the checkmark correctly, so it shows a "4" instead of a checkmark -- because the checkmark symbol they are using in the custom font just so happens to be mapped to the number "4".
Similarly, for the same reasons cited above, if you assign the checkbox to render squares (instead of checks), the letter "N" will appear in the checkbox instead of a square, because the square shape symbol is mapped to the letter "N".
This problem only exists in the embedded pdf document viewer in Firefox but will look perfectly normal when viewed in Adobe Acrobat Reader, or other offline pdf readers (and other browser pdf readers, which is why it looks fine in Chrome and IE), so when users download the form, it will appear like you would expect it to.
Some workarounds / optimizations you could try:
Try one of these, or all of these, they are in no particular order (or guaranteed to work)
Don't rely on the built-in pdf.js browser extension in firefox, instead, make your own updated version based on the latest pdf.js source or target another pdf library and use it's browser-agnostic API to render and display your pdfs.
Create an HTML form for the user to fill and verify all the information, then render the pdf based on the data supplied by the HTML form, for download only (no previewing in the browser). This will force them to open the pdf in their default pdf viewer where the issue is not present, because, again, the problem you describe only happens in Firefox's embedded pdf viewer and not in other pdf viewers like Adobe Acrobat).
Make sure you have the ZapfDingBats Font installed on your server. I haven't confirmed this, but that commit that was supposed to have solved this issue seems to have added support for this font, so it is worth a try to make sure this font is accessible on your ColdFusion server, then try previewing the rendered pdf in Firefox.
Detect that the user is accessing your form via Firefox, and if so, warn the users of the issue, but assure them that downloading the form and viewing in their default pdf viewer will work as expected.
Convert the page to HTML5 (if you aren't already), then add in an HTML5 shiv (so HTML5 features can be used on older browsers), and a CSS normalizer, and test if the problem persists using these optimal settings. It's worth a shot to make sure that the problem is somehow treated differently under the HTML5 standard, since not everyone is having the same issues as you.
Lastly, make sure that your HTML is being rendered as valid markup via your ColdFusion output by using an HTML validator.
Other than that, there isn't a whole lot you can do until the mozilla team updates their embedded pdf viewer. But since the problem is only in the firefox viewer, and not in the pdf itself, it it up to you to decide if this is a deal-breaker or not, and search for alternatives.
Note: PDF.js is built into version 19+ of Firefox.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Update: You can use this pdf (which represents the character mapping of the ZapDingbats symbol font) as a way of testing your browser's interpretation of embedded fonts in the pdf rendered via pdf.js. Note that at the time of this writing, the above pdf does not display the Zapf Dingbats properly in Firefox (via pdf.js), but other browsers render them just fine (notice the "4" next to a20[x2714] in firefox, and the checkmark next to the same entry (a20[x2714]) in Chrome.
So have a very strange issue in firefox with font-face. I've included all the different font version types (.ttf, .woff, etc.) but don't see it loading in the browser (works fine in chrome). However, when I inspect it with firebug and hover over the font name in the inspector, it previews it correctly. So it is loading the font somewhat, but not in the main browser window. Anyone seen this before?
It ended up being that if font-family has spaces in it you need to surround it with double quotes not single :P
Wild guess: do you use NoScript? It blocks downloaded fonts by default. (Rationale is that font engines weren't necessarily designed for arbitrary input and may be just as vulnerable to attack as anything else.)
So I'm going to start using data-uri's and mhtml to embed images in my stylesheets and i'm thinking of using Jammit to help me out there because it claims that it can generate data-uri and mhtml code for you
I know about the IE7 Vista||Win7 bug and that the fix is to close off the buondaries with a two dashes
If you look at the example mhtml file provided in the jammit docs you might notice that they do not use the fix detailed above for the IE7 bug.
Does Jammit handle the IE7 bug for you? I have no way of testing IE7 so I'd just like to be sure of this before I got off and spend hours trying to get it to work
I don't think it's an IE7 bug. the Multipart MIME RFC (1341 and its successors) clearly calls for the extra "--" at the end of the last boundary. I would consider it a Jammit bug.
Update: I checked the source, and it looks like they've fixed that bug. The example was generated before the fix.