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Hello,
Am 26.10.2013 15:44, schrieb Hans Bijkerk:
> Hi there,
>
> First of all, thanks for the amazing work on poppler. It's been
> very helpful on a lot of occasions.
I think general questions should be posed to the general audience on
the Poppler mailing list, so that everyone can benefit from the
question as well as possible answers.
> Currently, I'm looking for a fast way to generate a pngs or jpegs
> from a PDF; pdftoppm delivers on speed and is exactly what I'm
> looking for. (currently using the latest version, 0.24.2)
>
> However, there is one small thing I can't figure out: All
> hyperlinks within the PDF are rendered on the image output. Every
> clickable item in the PDF is represented as a small black bordered
> square.
>
> This is the command I'm using:
>
> *pdftoppm -f 1 -l 1 -scale-to-x 199 -scale-to-y 283 -cropbox -png
> 'my.pdf' > 'test.png'*
>
> Which gives this as the output image:
>
>
>
> All the squares are the hyperlinks, buy are invisible when reading
> the PDF in apps like Acrobat.
Have you compared pdftoppm's rendering with applications that are
based on Poppler like Evince or Okular?
> For my current project, this is unwanted behavior and I'm looking
> for a solution. This can be anything from a patch, a compile
> option, or a small C "hack" to get it working (I have C knowledge,
> btw).
In any case, you might want to look at line 216 of "pdftoppm.cc" where
PDFDoc::displayPageSlice is called and flags that control rendering
are set. The method signature is:
// Display part of a page.
void displayPageSlice(OutputDev *out, int page,
double hDPI, double vDPI, int rotate,
GBool useMediaBox, GBool crop, GBool printing,
int sliceX, int sliceY, int sliceW, int sliceH,
GBool (*abortCheckCbk)(void *data) = NULL,
void *abortCheckCbkData = NULL,
GBool (*annotDisplayDecideCbk)(Annot *annot,
void *user_data) = NULL,
void *annotDisplayDecideCbkData = NULL, GBool
copyXRef = gFalse);
If it just about enabling/disabling the printing flag, the attached
patch might help...
> Would love to hear any help, tips, pointers to code lines,
>
> All the best, Hans B. The Netherlands
>
Regards, Adam.
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>From 2f7df6f64b4ef9455241c21554d7159c2050a8fa Mon Sep 17 00:00:00 2001
From: Adam Reichold <[email protected]>
Date: Sat, 26 Oct 2013 16:35:03 +0200
Subject: [PATCH] Add printing option to pdftoppm to instruct Splash to render
images that are intended for printing.
---
utils/pdftoppm.cc | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/utils/pdftoppm.cc b/utils/pdftoppm.cc
index a3d4d10..59b4efa 100644
--- a/utils/pdftoppm.cc
+++ b/utils/pdftoppm.cc
@@ -79,6 +79,7 @@ static int w = 0;
static int h = 0;
static int sz = 0;
static GBool useCropBox = gFalse;
+static GBool printing = gFalse;
static GBool mono = gFalse;
static GBool gray = gFalse;
static GBool png = gFalse;
@@ -140,6 +141,8 @@ static const ArgDesc argDesc[] = {
"size of crop square in pixels (sets W and H)"},
{"-cropbox",argFlag, &useCropBox, 0,
"use the crop box rather than media box"},
+ {"-printing",argFlag, &printing, 0,
+ "render images intended for printing"},
{"-mono", argFlag, &mono, 0,
"generate a monochrome PBM file"},
@@ -216,7 +219,7 @@ static void savePageSlice(PDFDoc *doc,
doc->displayPageSlice(splashOut,
pg, x_resolution, y_resolution,
0,
- !useCropBox, gFalse, gFalse,
+ !useCropBox, gFalse, printing,
x, y, w, h
);
--
1.8.4.1
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