Dependencies and Licensing

• the source code of this plugin developed using the 4D Plug-in SDK is licensed under the MIT license
• see Poppler for the licensing of Poppler (shared library).
• the licensing of the binary product of this plugin is subject to the licensing of all its dependencies.

4d-plugin-poppler

Extract text from PDF, convert PDF to SVG.

Syntax

error:=PDF Convert (pdf;svg;from;to;password;method)

Parameter	Type	Description
pdf	BLOB	The PDF document BLOB
svg	ARRAY PICTURE (or ARRAY TEXT or ARRAY BLOB)	Array to receive the pages (must be defined); See remarks below
from	LONGINT	Starting page (1 based) [optional]
to	LONGINT	Ending page (1 based) [optional]
password	TEXT	Password [optional]
method	TEXT	Callback method [optional]
error	LONGINT	Error code

error:=PDF Get text (pdf;svg;from;to;password;method)

Parameter	Type	Description
pdf	BLOB	The PDF document BLOB
svg	ARRAY TEXT	Array to receive the pages
from	LONGINT	Starting page (1 based) [optional]
to	LONGINT	Ending page (1 based) [optional]
password	TEXT	Password [optional]
method	TEXT	Callback method [optional]
error	LONGINT	Error code

 page count (pdf;password)

Parameter	Type	Description
pdf	BLOB	The PDF document BLOB
password	TEXT	Password [optional]
count	LONGINT	Page count

Examples

$path:=Get 4D folder(Current resources folder)+"sample.pdf"
DOCUMENT TO BLOB($path;$PDF)

ARRAY PICTURE($pages;0)
$startPage:=0
$endPage:=0
$password:=""
$callback:="PDF2SVG_CB_PICTURE"

<>p:=Progress New 
Progress SET PROGRESS (<>P;0)
Progress SET BUTTON ENABLED (<>P;True)

$error:=PDF Convert ($PDF;$pages;$startPage;$endPage;$password;$callback)

Progress QUIT (<>P)

$path:=Get 4D folder(Current resources folder)+"sample.pdf"
DOCUMENT TO BLOB($path;$PDF)

ARRAY TEXT($pages;0)
$startPage:=0
$endPage:=0
$password:=""
$callback:="PDF2TEXT_CB"

<>p:=Progress New 
Progress SET PROGRESS (<>P;0)
Progress SET BUTTON ENABLED (<>P;True)

$error:=PDF Get text ($PDF;$pages;$startPage;$endPage;$password;$callback)

Progress QUIT (<>P)

Callback

The method is executed in the same process as the calling method.

Parameters:

C_LONGINT($1;$pos)//1-based
C_LONGINT($2;$total)
C_LONGINT($3;$pageNumber)//1-based
C_PICTURE($4;$page)
C_BOOLEAN($0;$stop)

To display a progress bar:

Progress SET PROGRESS (<>P;$pos/$total)

To abort:

$0:=Progress Stopped (<>P)

Error codes

#define PDF2SVG_ERROR_InvalidSourceData (-1)
#define PDF2SVG_ERROR_InvalidReturnType (-2)
#define PDF2SVG_ERROR_AbortedByUser (-3)

Alternate syntax

Alternatively, you may pass ARRAY TEXT or ARRAY BLOB in $2. However, $4 in the callback function will not be used. The current page data will only be passed to the callback method when ARRAY PICTURE is used. It's main purpose is to display a preview image. Note that the image is a ref-counted duplicate of the final array element.

Build notes

iconv by cmake may be missing the symbol libiconv_set_relocation_prefix

add a stub function

extern LIBICONV_DLL_EXPORTED void libiconv_set_relocation_prefix (const char *orig_prefix,
                                                                  const char *curr_prefix){do {} while(0);}

zlib by cmake may be missing the symbol _inflateValidate

normal make instead

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