On Wed, Oct 11, 2017 at 2:03 PM, Ben Coman <b...@openinworld.com> wrote:
> > > On Tue, Oct 10, 2017 at 8:58 PM, Manuel Leuenberger > > <leuenber...@inf.unibe.ch> wrote: > > > Hi, > > > > > > I want to view a PDF within Pharo. I found that Athens has a PDF > canvas, but I have no idea how to use it. Is there a way to view a PDF > within Pharo, so that I can scroll, zoom, click links etc. in the PDF? > > > > > > Cheers, > > > Manuel > > > On Wed, Oct 11, 2017 at 3:04 AM, Stephane Ducasse <stepharo.s...@gmail.com> > wrote: > > > > Hi manuel > > > > So far I do not know if we have this is Pharo. > > I imagine that we would have to build a renderer once we will have the > > PDF reader from Christian library. > > > > Stef > > [Edit: Update license link] > A renderer will have great synergy with PDFTalk, but I think a proof of > concept can be done independently. > I've been poking at this topic for a while looking for options. > Coincidentally a couple of days I discovered the PDFium library. > I haven't had time yet to give it a run, but it seems a good candidate > since... > * Its a successful commercial product by Foxit built into Chrome converted > to open source with Google's backing for use in Chromium > https://www.foxitsoftware.com/company/press.php?id=305 > * Its license is BSD style > *https://github.com/hfiguiere/pdfium/blob/master/LICENSE > <https://github.com/hfiguiere/pdfium/blob/master/LICENSE>* > * Although written in C++ it has a C interface > https://github.com/hfiguiere/pdfium/blob/master/public/fpdfview.h > * Search here on " Function: " to skim through > * Proof of concept seems to only need these key functions... > * void FPDF_RenderPageBitmap( FPDF_BITMAP bitmap,FPDF_PAGE > page, ... ) > * FPDF_BITMAP FPDFBitmap_Create( int width, int height, int > alpha); > * FPDF_PAGE FPDF_LoadPage ( FPDF_DOCUMENT document, int > page_index ) > * FPDF_DOCUMENT FPDF_LoadMemDocument ( const void* data_buf > ... ) > * void FPDF_InitLibrary () > * Has a concise getting started for POC... > https://github.com/hfiguiere/pdfium/blob/master/docs/getting > -started.md > * Maybe useful fork with V8 disabled by default > https://github.com/klokantech/pdfium > * Master repo here > https://pdfium.googlesource.com/pdfium/ > > So Pharo might load a PDF file into a ByteArray, pass that to > FPDF_LoadMemDocument() & FPDF_LoadPage(), > then get a bitmap back from FPDFBitmap_Create() & FPDF_RenderPageBitmap() > and display the result in a Pharo window. > > The rest of this week I'm working 12 hour days on a mine site. I could > try it out once I'm home, but in the meantime is anyone else keen to try > it? > > cheers -ben >
