Monkeybread Software - DynaPDF Manual

DynaPDF Manual - Page 560

Function Reference

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Complex color spaces such as Lab, Separation, DeviceN, Colored Tiling Patterns, and Shadings are

always treated as color. The function does not return when a color is set, the color must be used by

an object.

Return values:

If an object of the page uses a color, the return value is 1. If no object uses a color the return value is

0. A negative return value indicates that an error occurred.

IsEmptyPage

Syntax:

SI32 pdfIsEmptyPage(

const PPDF* IPDF) // Instance pointer

The function checks whether a page is empty. The page which should be checked must be opened

with the function EditPage() beforehand. The function does not check whether the buffer size of a

page is zero to determine whether a page is empty. Instead, the content stream will be parsed until a

visible object can be found.

Return values:

If no visible object can be found the return value is 1. If a visible object can be found the return value

is 0. A negative return value indicates that an error occurred.

IsWrongPwd

Syntax:

#define IsWrongPwd(ErrCode)

// C/C++

Function IsWrongPwd(ByVal ErrCode As Integer) As Boolean // Visual Basic

function IsWrongPwd(ErrCode: Integer): Boolean;

// Delphi

The function returns true is the supplied error code indicates that a password is required to decrypt

the PDF file. The error code must be a return value of the function OpenImportFile() or

OpenImportBuffer().

This function is implemented as macro in C/C++. In prior DynaPDF versions the macro name was

PDF_WRONG_PWD() which is still defined. However, for consistency among different

programming languages the new macro name IsWrongPwd() should be used.