jung-kurt / gofpdf Goto Github PK

See: http://blog.klauspost.com/optimized-gzipzip-packages-30-50-faster/ --- a drop in replacement for Go's standard compression package.

As an experiment, I've used it on in font.go and util.go, and indeed for my application, pdfdeck, builds are a bit faster on my MacBook AIr (1.4 vs 1.3 seconds to build a image-heavy presentation).

Any interest?

You mention in the docs that Helvetica(aka arial) is this actually true? Have read that Helvetica is a likely ancestor of arial is that what you mean? Have a need to use arial as a requirement.

Is it normal that nothing is printed without any tag when I'm calling the html method?

pdf := gofpdf.New("P", "mm", "A4", "")
pdf.AddPage()
pdf.SetFont("Times", "", 13)
_, lineHt := pdf.GetFontSize()
html := pdf.HTMLBasicNew()
html.Write(lineHt, "<>first</>")
html.Write(lineHt, "second")
if e := pdf.OutputFileAndClose("./p.pdf"); e != nil {
    log.Fatal(e)
}

It results in printing first but not second.

I'm not sure how I can add and use custom fonts:

• why is the font .ttf file not enough?
• where do I get a .map file for my font?
• how to export the font so it will be "unicode-compatible"?

I'm interested in using DejaVuSansCondensed.ttf from Dejavu font distribution.

PS: the project is awesome! you've done a great work!

the question like title!

I'm having problems with building a table row.

It can happend that a first column in a row has height of 40, and the second column in the same row gets larger because text is too large.

Because of that i get unaligned borders..
Is it possible to somehow define row border?

At the moment, the tests validate that the code runs. It also provides a lot of examples for the users of gofpdf.

However, it doesn't test if functionality is as expected. This is particularly important when changing functionality or adding new features.

My suggestion for this would be to have a set of pre-defined PDFs (the ones that are generated through the examples now) and compare the same PDF generation instructions to those PDFs. This assures that new/changed code wouldn't change old output (unintentional).

To do this, there needs to be a change to the way the file gets parsed. At the moment, time.Now() is used to put the creation date in place. This makes it tricky to compare the file as this date always changes and thus the output will always be different.

I'm suggesting a simple Clock implementation here to make it possible to mock this out during tests.

I have made a rough version of how this could work here: https://github.com/jung-kurt/gofpdf/compare/master...jelmersnoeck:test-comparison?expand=1

Would you be open to accept this kind of system for testing output? (Note, the version above is a POC, the actual implementation will probably be a bit different)

tried to run makefont on the otf file
it says 'fonts based on PostScript outlines are not supported'

GetFontSize returns the total height of the text (from Desc to Asc in picture below), but I need to know the baseline. For example in the text "go" I'd like to know how to calculate the bottom of the "o", not of the "g", is this possible (base in picture below)? I have the feeling this info could be parsed somewhere in the getInfoFrom* functions in font.go.

http://godoc.org/code.google.com/p/gofpdf is still referenced by the internet. It would be good if it could point to the github repository.

I am trying to use gofpdf with czech language. First I exported "Arial.json" and "Arial.z" with:

./makefont --embed --enc=../font/cp1250.map --dst=/somepath /Library/Fonts/Arial.ttf

Then i use code to generate pdf:

pdf := gofpdf.New("L", "mm", "A4", "")
pdf.AddPage()
pdf.AddFont("arial", "", "/somepath/Arial.json")


pdf.SetFont("arial", "", 16)
pdf.Cell(10, 10, "Dárkový poukaz v hodnotě")

But instead of text "Dárkový poukaz v hodnotě", I got "DĂĄrkovĂ˝ poukaz v hodnotÄ�". I don't know if czech language is supported. What should I do to have czech text displayed properly?

It may be useful to be able to read an existing pdf file, and be able to write over it.

Hi, I would like to know if it is possible to generate portuguese/spanish pdfs by using your library. I was trying to use a google's font that has these characters (Roboto-Regular.ttf), but it did not work

Hello,
I used "code.google.com/p/gofpdf" but it is not easy for accent char. Your package is in philosophy of Golang. For generate PDF, all text est in UTF-8.

But I see several problems in this package:

• When I use accent char in CellFormat like "é", the char don't display correctly.
  For correct this problem I had add this line "txtStr=utf8toutf16(txtStr)" in the "fpdf.go" ( ligne 1712 ). I can't insert this line before because GetStringWidth return 0 in utf16.
• Then the text don't display correctly:
  I have delete this line "res = append(res, 0xFE, 0xFF)" in the utf8toutf16 function because I don't be in the beginning file.

Can you check if the correction is good for you ?

In order to speed up the rendering in pdfdeck (https://github.com/ajstarks/deck/tree/master/cmd/pdfdeck) I'd like to experiment with concurrent rendering of slides. (see Line 312 for the function that does this)

Questions:

1. are the rendering functions safe for concurrent use?
2. Suggested approaches to concurrent page rendering.

how to draw MultiCell side by side?
when i set width as 60 for both MultiCell, the second MultiCell is drawn below the first.
help?

Hi, could I save the result to PNG instead PDF?

The example file Fpdf_SVGBasicWrite.pdf, generated by ExampleFpdf_SVGBasicWrite() in fpdf_test.go, shows some words that should be separated by a space but are not. When compression is turned off, it is evident that the spaces have been deleted from the written text so this is not a rendering issue. The example generated by checkout Merge pull request #44 is correct; the example generated from the next checkout, Fpdf: add WriteAligned, is not.

@jelmersnoeck, I have not looked into this. Can you see what might be going on?

I would like to create a Go binary with embedded font files (.json and .z). I will do this by appending a ZIP file containing all the required files to the Go generated binary. So far so good. In order to be able to use these embedded font files with gofpdf I would like to have it accept readers for both .json and .z files. Currently it only supports loading the .json font file from an io.Reader using AddFontFromReader. The actual font data (.z) is then loaded using the file system call. This makes AddFontFromReader effectively useless.

In order to support font files embedded into the executable (or maybe reading them from a ZIP file) I would propose to add a SetFontOpener(opener FontOpener) method to the Fpdf struct where FontOpener is an interface defined as follows:

type FontOpener interface {
    Open(name string) io.Reader, error
}

The Open method could then be called to get readers for both the .json and .z font files. In order to keep the interface as non-restrictive as possible I defined it to return an io.Reader instead of an io.ReaderCloser. Nevertheless you could close closeable readers in your code using the following fragment:

reader, err := f.opener.Open(fontFile)
…

if closer, ok := reader.(io.Closer); ok {
    closer.Close()
}

is there any planning to incorporate TIFF support (G3, G4 encoding) in your project?

Thank you in advance

I was just wondering if there was any way to define a text area and a preferred font size with a shrink-to-fit option? ie. If the text doesn't fit in the box, it continues to shrink until it does?

pdf.Cell(5, 10, "Hello, world")
print "Hello Word"
but i want to print only width size like "Hello "
how can i restrict string to print more then width.

From GoDoc:

encodingFileStr is the name of the encoding file that corresponds to the font

What is an encoding file? If I use a Google Fonts font, how do I find its encoding file?

http://godoc.org/github.com/jung-kurt/gofpdf should be the website for this project imo. It seems there is no documentation until you see the readme.

"For every hour of code you write, spend an hour writing your README"
https://medium.com/@cwRichardKim/how-to-get-hundreds-of-stars-on-your-github-project-345b065e20a2

I know that the godoc documentation provides this, but I'm afraid that visitors quickly exploring many repositories on github do not click on the link. It is also much more easy to star the project if the README convinces you.

If you want, I can prepare a pull request.

Not really an issue, but more a critical question. Would it be not better for an outsider to use OutputFileAndClose instead of Output? Are people not more interested in quickly generating a pdf file rather than seeing its raw data stream?

It doesn't appear that gofpdf includes FPDF's ability to render a PDF file to a bitmap. Am I missing something in that regard? I'm looking for something to open a PDF file, grab the first page, and generate a PNG it (via image.png.Encode()).

I want to use Sourcegraph for gofpdf code search, browsing, and usage examples. Can an admin enable Sourcegraph for this repository? Just go to https://sourcegraph.com/github.com/jung-kurt/gofpdf. (It should only take 30 seconds.)

Thank you!

SetFontSize is confusing as it uses points, where all other drawing operations use the unit size. Right now it is not straightforward to set the font size in units, as the scale factor f.k is private. It feels quite clumsy to calculate it first with eg. GetFontSize

We can't touch anymore SetFontSize for backwards compatibilty, but we could solve it in these ways:

1. Expose f.k as a f.Unit2Point field
2. Define a SetFontUnitSize method
3. Define a UnitToPoint method (and maybe PointToUnit)
4. ... (I'm open for better solutions)

I think 1 has my preference as it is more generally useful and has the least impact. I can do a pull request when an agreement is reached.

Can I render PDF on server (render stream output) not write to disk, and not forced to download?

tried to do html.Write(<u>underline this</u>)
and it doesnt underline the word.
is underline not supported?
thx

I'm having problem justfying text with different fonts (some parts of text are bold, some are not)..

Is this possible? :/

Justification with a single font is not a problem

For draw2d I need to be able to look up the transparency and blend mode. As in svg and bitmap drawing RGBA colors are used instead of RGB colors as in gopdf. I need to be able to check the current state, to decide if a new call to SetAlpha is necessary. This is also necessary to preserve the blendmode, if I only want to adjust the alpha. I will prepare a pull request.

i get this error message "16-bit depth not supported in PNG file" when trying to use a png file
any idea how should i fix this?
thank you
the image is created using golang png encoder.

Hello! I need to create cyrillic text in pdf but example found in docs not working. Here is code

package main

import (
    "github.com/jung-kurt/gofpdf"
    "fmt"
    "os"
)

func main() {
    pwd, err := os.Getwd()
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    pdf := gofpdf.New("P", "mm", "A4", "")
    pdf.AddFont("Helvetica", "", pwd + "/font/helvetica_1251.json")
    pdf.AddPage()
    pdf.SetFont("Helvetica", "", 16)
    tr := pdf.UnicodeTranslatorFromDescriptor("cp1251")
    pdf.Cell(15, 50, tr("русский текст"))
    pdf.OutputFileAndClose("test.pdf")
}

I receive only dots.

When using this package I noticed that if you change font in template, the template still uses default font style in output (Atleast when viewed on Acrobat Reader). Also encoding of special characters doesn't work.
I noticed that in output file XObject doesn't have Resource reference to declared Font objects.
(This is only recommended on PDF standard)
Fix:
On templates.go file (line: 113, function putTemplates) I just added Font resource declaration (after line 136):

  f.out("/Font <<")
  {
      var keyList []string
      var font fontDefType
      var key string
      for key = range f.fonts {
          keyList = append(keyList, key)
      }
      if f.catalogSort {
          sort.Strings(keyList)
      }
      for _, key = range keyList {
          font = f.fonts[key]
          f.outf("/F%d %d 0 R", font.I, font.N)
      }
  }
  f.out(">>")

After the "/ProcSet ..." output:

  f.out("/Resources ")
  f.out("<</ProcSet [/PDF /Text /ImageB /ImageC /ImageI]")

I need to write custom complex shapes to fpdf. Unfortunately these are not generally usable and would otherwise bloat the api by adding methods. Also it useful if you want to redraw multiple times a path, which was generated by a cpu intensive and long running algorithm.

So I need to write directly to the stream when fpdf is imported in another package. I'd like to see f.out exposed as e.g. f.Stream/f.Write/... with a disclaimer that is only for low level access in its docstring. If this is not possible I have to fork the package which I would like to avoid.

The images themselves render as expected in nautilus and chrome, just not in the exported pdf's.

go version go1.4.1 linux/amd64

Dear
when i use CellFormat and give width then why text overflow the width ?

Trying to right-justify an image -- even if you know its dpi -- is a bit of work. The imginfo.Extent() and related functions assume that the image is 72 dpi.

Here's what I had to do:

    imginfo := pdf.RegisterImage(imgname, "")
    imgdpi := float64(288)
    widthInPixels := pdf.UnitToPointConvert(imginfo.Width())
    w := widthInPixels * pdf.PointToUnitConvert(72/imgdpi)
    pgw, _ := pdf.GetPageSize()
    lm, _, rm, _ := pdf.GetMargins()
    imgpos := pgw - lm - rm - w
    pdf.Image(imgname, imgpos, 0, -imgdpi, -imgdpi, true, "", 0, "")

The easiest fix I can see (since the Go image routines don't provide dpi info) would be to provide an imginfo.DpiExtent function that takes dpi as a parameter.

A better fix would be to allow setting DPI on an image and having it taken into account. Perhaps imginfo could grow a dpi field, it could be set to 72 by default, but if you override it, it would get taken into account.

I'd be willing to submit a PR with a fix, but I'd like to know what sort of fix you'd approve before I do it, please.

Am currently handling this this way:
// Current Weight
pdf.SetFont("Helvetica", "B", 11)
pdf.CellFormat(1.8, 0, "4. Current Weight: ", "", 0, "L", false, 0, "")
pdf.SetFont("Helvetica", "", 11)
pdf.CellFormat(PDF_INTERNAL_WIDTH/4, 0, ""+CurrentWeight, "", 1, "LM", false, 0, "")
pdf.Ln(.2)
Is there some thing I am missing that would reduce the amount of code?
Thanks,
Jim

I am creating a tool which outputs labels. I need know the length of the input string, before I can create an appropriately sized page. Currently I am doing something like this:

label := "0123456789 GO FPDF!"
scratchPdf := gofpdf.New("L", "mm", "Legal", "/tmp")
scratchPdf.AddFont("SourceCodePro-Bold", "", "SourceCodePro-Bold.json")
scratchPdf.SetFont("SourceCodePro-Bold", "", 12)
labelWidth := scratchPdf.GetStringWidth(label)

But it seems awkward to need to create a page, just to measure the width of a string. Why is an fpdf instance required to measure a string?

As the number of tutorials are growing, it gets hard to quickly look up some example code. Now you first have to find a relevant function, read the tutorial number and scroll back. It would maybe more efficient to have some keywords in the title instead of just a number.

So instead of:

• ExampleFpdf_tutorial31

it could be:

• ExampleFpdf_tutorial31_line_caps_join_style (does not give golint error)
• ExampleFpdf_tutorial31LineCapsJoinStyle
• ExampleFpdf_31_line_caps_join_style (does not give golint error)
• ExampleFpdf_31LineCapsJoinStyle

font.go has only 50% test coverage, mainly because Type1 font testing is missing.

I have a font that supports small caps but can't figure out how to use those small caps in the pdf. I tried hacking in and modifying the .json Flags property to include Small Caps flag (1 << 18) but no effect. Any Idea?

Hi,

Thanks for this work.

I was looking for a solution to add a custom font without having to load any files. I thought AddFontFromReader would do that, but it appears to only load the definition from a reader. As far as I can tell the library attempts to load the font itself (font.z) from the file system. As it currently stands, is there a way to supply a custom font in another way?

It seems now when I use a font, the entire font gets embedded into the document. For me this can lead to large file sizes, espcially if I only use that font for a few characters. Is there an option to only render the given characters as outlines rather than embedding the entire font? Or is it already doing that?

Now we have a test coverage of 82%. It would be good to further increase it. Test coverage is no guarantee, just like golint, go vet, ... but it is just an automated way to increase the quality of the code and to avoid collaboration discussions. Also could we take as a condition for merging that the coverage does not decrease.

How to display chinese characters ?
Should I use cp1252.map ?
Thanks !