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// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// This is the main header file for embedders of PDFium. It provides APIs to
// initialize the library, load documents, and render pages, amongst other
// things.
//
// NOTE: None of the PDFium APIs are thread-safe. They expect to be called
// from a single thread. Barring that, embedders are required to ensure (via
// a mutex or similar) that only a single PDFium call can be made at a time.
//
// NOTE: External docs refer to this file as "fpdfview.h", so do not rename
// despite lack of consistency with other public files.
#ifndef PUBLIC_FPDFVIEW_H_
#define PUBLIC_FPDFVIEW_H_
// clang-format off
#include <stddef.h>
#if defined(_WIN32) && !defined(__WINDOWS__)
#include <windows.h>
#endif
#ifdef PDF_ENABLE_XFA
// PDF_USE_XFA is set in confirmation that this version of PDFium can support
// XFA forms as requested by the PDF_ENABLE_XFA setting.
#define PDF_USE_XFA
#endif // PDF_ENABLE_XFA
// PDF object types
#define FPDF_OBJECT_UNKNOWN 0
#define FPDF_OBJECT_BOOLEAN 1
#define FPDF_OBJECT_NUMBER 2
#define FPDF_OBJECT_STRING 3
#define FPDF_OBJECT_NAME 4
#define FPDF_OBJECT_ARRAY 5
#define FPDF_OBJECT_DICTIONARY 6
#define FPDF_OBJECT_STREAM 7
#define FPDF_OBJECT_NULLOBJ 8
#define FPDF_OBJECT_REFERENCE 9
// PDF text rendering modes
typedef enum {
FPDF_TEXTRENDERMODE_UNKNOWN = -1,
FPDF_TEXTRENDERMODE_FILL = 0,
FPDF_TEXTRENDERMODE_STROKE = 1,
FPDF_TEXTRENDERMODE_FILL_STROKE = 2,
FPDF_TEXTRENDERMODE_INVISIBLE = 3,
FPDF_TEXTRENDERMODE_FILL_CLIP = 4,
FPDF_TEXTRENDERMODE_STROKE_CLIP = 5,
FPDF_TEXTRENDERMODE_FILL_STROKE_CLIP = 6,
FPDF_TEXTRENDERMODE_CLIP = 7,
FPDF_TEXTRENDERMODE_LAST = FPDF_TEXTRENDERMODE_CLIP,
} FPDF_TEXT_RENDERMODE;
// PDF types - use incomplete types (never completed) to force API type safety.
typedef struct fpdf_action_t__* FPDF_ACTION;
typedef struct fpdf_annotation_t__* FPDF_ANNOTATION;
typedef struct fpdf_attachment_t__* FPDF_ATTACHMENT;
typedef struct fpdf_avail_t__* FPDF_AVAIL;
typedef struct fpdf_bitmap_t__* FPDF_BITMAP;
typedef struct fpdf_bookmark_t__* FPDF_BOOKMARK;
typedef struct fpdf_clippath_t__* FPDF_CLIPPATH;
typedef struct fpdf_dest_t__* FPDF_DEST;
typedef struct fpdf_document_t__* FPDF_DOCUMENT;
typedef struct fpdf_font_t__* FPDF_FONT;
typedef struct fpdf_form_handle_t__* FPDF_FORMHANDLE;
typedef const struct fpdf_glyphpath_t__* FPDF_GLYPHPATH;
typedef struct fpdf_javascript_action_t* FPDF_JAVASCRIPT_ACTION;
typedef struct fpdf_link_t__* FPDF_LINK;
typedef struct fpdf_page_t__* FPDF_PAGE;
typedef struct fpdf_pagelink_t__* FPDF_PAGELINK;
typedef struct fpdf_pageobject_t__* FPDF_PAGEOBJECT; // (text, path, etc.)
typedef struct fpdf_pageobjectmark_t__* FPDF_PAGEOBJECTMARK;
typedef const struct fpdf_pagerange_t__* FPDF_PAGERANGE;
typedef const struct fpdf_pathsegment_t* FPDF_PATHSEGMENT;
typedef struct fpdf_schhandle_t__* FPDF_SCHHANDLE;
typedef const struct fpdf_signature_t__* FPDF_SIGNATURE;
typedef void* FPDF_SKIA_CANVAS; // Passed into Skia as an SkCanvas.
typedef struct fpdf_structelement_t__* FPDF_STRUCTELEMENT;
typedef const struct fpdf_structelement_attr_t__* FPDF_STRUCTELEMENT_ATTR;
typedef const struct fpdf_structelement_attr_value_t__*
FPDF_STRUCTELEMENT_ATTR_VALUE;
typedef struct fpdf_structtree_t__* FPDF_STRUCTTREE;
typedef struct fpdf_textpage_t__* FPDF_TEXTPAGE;
typedef struct fpdf_widget_t__* FPDF_WIDGET;
typedef struct fpdf_xobject_t__* FPDF_XOBJECT;
// Basic data types
typedef int FPDF_BOOL;
typedef int FPDF_RESULT;
typedef unsigned long FPDF_DWORD;
typedef float FS_FLOAT;
// Duplex types
typedef enum _FPDF_DUPLEXTYPE_ {
DuplexUndefined = 0,
Simplex,
DuplexFlipShortEdge,
DuplexFlipLongEdge
} FPDF_DUPLEXTYPE;
// String types
typedef unsigned short FPDF_WCHAR;
// The public PDFium API uses three types of strings: byte string, wide string
// (UTF-16LE encoded), and platform dependent string.
// Public PDFium API type for byte strings.
typedef const char* FPDF_BYTESTRING;
// The public PDFium API always uses UTF-16LE encoded wide strings, each
// character uses 2 bytes (except surrogation), with the low byte first.
typedef const FPDF_WCHAR* FPDF_WIDESTRING;
// Structure for persisting a string beyond the duration of a callback.
// Note: although represented as a char*, string may be interpreted as
// a UTF-16LE formated string. Used only by XFA callbacks.
typedef struct FPDF_BSTR_ {
char* str; // String buffer, manipulate only with FPDF_BStr_* methods.
int len; // Length of the string, in bytes.
} FPDF_BSTR;
// For Windows programmers: In most cases it's OK to treat FPDF_WIDESTRING as a
// Windows unicode string, however, special care needs to be taken if you
// expect to process Unicode larger than 0xffff.
//
// For Linux/Unix programmers: most compiler/library environments use 4 bytes
// for a Unicode character, and you have to convert between FPDF_WIDESTRING and
// system wide string by yourself.
typedef const char* FPDF_STRING;
// Matrix for transformation, in the form [a b c d e f], equivalent to:
// | a b 0 |
// | c d 0 |
// | e f 1 |
//
// Translation is performed with [1 0 0 1 tx ty].
// Scaling is performed with [sx 0 0 sy 0 0].
// See PDF Reference 1.7, 4.2.2 Common Transformations for more.
typedef struct _FS_MATRIX_ {
float a;
float b;
float c;
float d;
float e;
float f;
} FS_MATRIX;
// Rectangle area(float) in device or page coordinate system.
typedef struct _FS_RECTF_ {
// The x-coordinate of the left-top corner.
float left;
// The y-coordinate of the left-top corner.
float top;
// The x-coordinate of the right-bottom corner.
float right;
// The y-coordinate of the right-bottom corner.
float bottom;
} * FS_LPRECTF, FS_RECTF;
// Const Pointer to FS_RECTF structure.
typedef const FS_RECTF* FS_LPCRECTF;
// Rectangle size. Coordinate system agnostic.
typedef struct FS_SIZEF_ {
float width;
float height;
} * FS_LPSIZEF, FS_SIZEF;
// Const Pointer to FS_SIZEF structure.
typedef const FS_SIZEF* FS_LPCSIZEF;
// 2D Point. Coordinate system agnostic.
typedef struct FS_POINTF_ {
float x;
float y;
} * FS_LPPOINTF, FS_POINTF;
// Const Pointer to FS_POINTF structure.
typedef const FS_POINTF* FS_LPCPOINTF;
typedef struct _FS_QUADPOINTSF {
FS_FLOAT x1;
FS_FLOAT y1;
FS_FLOAT x2;
FS_FLOAT y2;
FS_FLOAT x3;
FS_FLOAT y3;
FS_FLOAT x4;
FS_FLOAT y4;
} FS_QUADPOINTSF;
// Annotation enums.
typedef int FPDF_ANNOTATION_SUBTYPE;
typedef int FPDF_ANNOT_APPEARANCEMODE;
// Dictionary value types.
typedef int FPDF_OBJECT_TYPE;
#if defined(COMPONENT_BUILD)
// FPDF_EXPORT should be consistent with |export| in the pdfium_fuzzer
// template in testing/fuzzers/BUILD.gn.
#if defined(WIN32)
#if defined(FPDF_IMPLEMENTATION)
#define FPDF_EXPORT __declspec(dllexport)
#else
#define FPDF_EXPORT __declspec(dllimport)
#endif // defined(FPDF_IMPLEMENTATION)
#else
#if defined(FPDF_IMPLEMENTATION)
#define FPDF_EXPORT __attribute__((visibility("default")))
#else
#define FPDF_EXPORT
#endif // defined(FPDF_IMPLEMENTATION)
#endif // defined(WIN32)
#else
#define FPDF_EXPORT
#endif // defined(COMPONENT_BUILD)
#if defined(WIN32) && defined(FPDFSDK_EXPORTS)
#define FPDF_CALLCONV __stdcall
#else
#define FPDF_CALLCONV
#endif
// Exported Functions
#ifdef __cplusplus
extern "C" {
#endif
// PDF renderer types - Experimental.
// Selection of 2D graphics library to use for rendering to FPDF_BITMAPs.
typedef enum {
// Anti-Grain Geometry - https://sourceforge.net/projects/agg/
FPDF_RENDERERTYPE_AGG = 0,
// Skia - https://skia.org/
FPDF_RENDERERTYPE_SKIA = 1,
} FPDF_RENDERER_TYPE;
// Process-wide options for initializing the library.
typedef struct FPDF_LIBRARY_CONFIG_ {
// Version number of the interface. Currently must be 2.
// Support for version 1 will be deprecated in the future.
int version;
// Array of paths to scan in place of the defaults when using built-in
// FXGE font loading code. The array is terminated by a NULL pointer.
// The Array may be NULL itself to use the default paths. May be ignored
// entirely depending upon the platform.
const char** m_pUserFontPaths;
// Version 2.
// Pointer to the v8::Isolate to use, or NULL to force PDFium to create one.
void* m_pIsolate;
// The embedder data slot to use in the v8::Isolate to store PDFium's
// per-isolate data. The value needs to be in the range
// [0, |v8::Internals::kNumIsolateDataLots|). Note that 0 is fine for most
// embedders.
unsigned int m_v8EmbedderSlot;
// Version 3 - Experimental.
// Pointer to the V8::Platform to use.
void* m_pPlatform;
// Version 4 - Experimental.
// Explicit specification of core renderer to use. |m_RendererType| must be
// a valid value for |FPDF_LIBRARY_CONFIG| versions of this level or higher,
// or else the initialization will fail with an immediate crash.
// Note that use of a specified |FPDF_RENDERER_TYPE| value for which the
// corresponding render library is not included in the build will similarly
// fail with an immediate crash.
FPDF_RENDERER_TYPE m_RendererType;
} FPDF_LIBRARY_CONFIG;
// Function: FPDF_InitLibraryWithConfig
// Initialize the PDFium library and allocate global resources for it.
// Parameters:
// config - configuration information as above.
// Return value:
// None.
// Comments:
// You have to call this function before you can call any PDF
// processing functions.
FPDF_EXPORT void FPDF_CALLCONV
FPDF_InitLibraryWithConfig(const FPDF_LIBRARY_CONFIG* config);
// Function: FPDF_InitLibrary
// Initialize the PDFium library (alternative form).
// Parameters:
// None
// Return value:
// None.
// Comments:
// Convenience function to call FPDF_InitLibraryWithConfig() with a
// default configuration for backwards compatibility purposes. New
// code should call FPDF_InitLibraryWithConfig() instead. This will
// be deprecated in the future.
FPDF_EXPORT void FPDF_CALLCONV FPDF_InitLibrary();
// Function: FPDF_DestroyLibrary
// Release global resources allocated to the PDFium library by
// FPDF_InitLibrary() or FPDF_InitLibraryWithConfig().
// Parameters:
// None.
// Return value:
// None.
// Comments:
// After this function is called, you must not call any PDF
// processing functions.
//
// Calling this function does not automatically close other
// objects. It is recommended to close other objects before
// closing the library with this function.
FPDF_EXPORT void FPDF_CALLCONV FPDF_DestroyLibrary();
// Policy for accessing the local machine time.
#define FPDF_POLICY_MACHINETIME_ACCESS 0
// Function: FPDF_SetSandBoxPolicy
// Set the policy for the sandbox environment.
// Parameters:
// policy - The specified policy for setting, for example:
// FPDF_POLICY_MACHINETIME_ACCESS.
// enable - True to enable, false to disable the policy.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
FPDF_BOOL enable);
#if defined(_WIN32)
// Experimental API.
// Function: FPDF_SetPrintMode
// Set printing mode when printing on Windows.
// Parameters:
// mode - FPDF_PRINTMODE_EMF to output EMF (default)
// FPDF_PRINTMODE_TEXTONLY to output text only (for charstream
// devices)
// FPDF_PRINTMODE_POSTSCRIPT2 to output level 2 PostScript into
// EMF as a series of GDI comments.
// FPDF_PRINTMODE_POSTSCRIPT3 to output level 3 PostScript into
// EMF as a series of GDI comments.
// FPDF_PRINTMODE_POSTSCRIPT2_PASSTHROUGH to output level 2
// PostScript via ExtEscape() in PASSTHROUGH mode.
// FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH to output level 3
// PostScript via ExtEscape() in PASSTHROUGH mode.
// FPDF_PRINTMODE_EMF_IMAGE_MASKS to output EMF, with more
// efficient processing of documents containing image masks.
// FPDF_PRINTMODE_POSTSCRIPT3_TYPE42 to output level 3
// PostScript with embedded Type 42 fonts, when applicable, into
// EMF as a series of GDI comments.
// FPDF_PRINTMODE_POSTSCRIPT3_TYPE42_PASSTHROUGH to output level
// 3 PostScript with embedded Type 42 fonts, when applicable,
// via ExtEscape() in PASSTHROUGH mode.
// Return value:
// True if successful, false if unsuccessful (typically invalid input).
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SetPrintMode(int mode);
#endif // defined(_WIN32)
// Function: FPDF_LoadDocument
// Open and load a PDF document.
// Parameters:
// file_path - Path to the PDF file (including extension).
// password - A string used as the password for the PDF file.
// If no password is needed, empty or NULL can be used.
// See comments below regarding the encoding.
// Return value:
// A handle to the loaded document, or NULL on failure.
// Comments:
// Loaded document can be closed by FPDF_CloseDocument().
// If this function fails, you can use FPDF_GetLastError() to retrieve
// the reason why it failed.
//
// The encoding for |file_path| is UTF-8.
//
// The encoding for |password| can be either UTF-8 or Latin-1. PDFs,
// depending on the security handler revision, will only accept one or
// the other encoding. If |password|'s encoding and the PDF's expected
// encoding do not match, FPDF_LoadDocument() will automatically
// convert |password| to the other encoding.
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password);
// Function: FPDF_LoadMemDocument
// Open and load a PDF document from memory.
// Parameters:
// data_buf - Pointer to a buffer containing the PDF document.
// size - Number of bytes in the PDF document.
// password - A string used as the password for the PDF file.
// If no password is needed, empty or NULL can be used.
// Return value:
// A handle to the loaded document, or NULL on failure.
// Comments:
// The memory buffer must remain valid when the document is open.
// The loaded document can be closed by FPDF_CloseDocument.
// If this function fails, you can use FPDF_GetLastError() to retrieve
// the reason why it failed.
//
// See the comments for FPDF_LoadDocument() regarding the encoding for
// |password|.
// Notes:
// If PDFium is built with the XFA module, the application should call
// FPDF_LoadXFA() function after the PDF document loaded to support XFA
// fields defined in the fpdfformfill.h file.
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password);
// Experimental API.
// Function: FPDF_LoadMemDocument64
// Open and load a PDF document from memory.
// Parameters:
// data_buf - Pointer to a buffer containing the PDF document.
// size - Number of bytes in the PDF document.
// password - A string used as the password for the PDF file.
// If no password is needed, empty or NULL can be used.
// Return value:
// A handle to the loaded document, or NULL on failure.
// Comments:
// The memory buffer must remain valid when the document is open.
// The loaded document can be closed by FPDF_CloseDocument.
// If this function fails, you can use FPDF_GetLastError() to retrieve
// the reason why it failed.
//
// See the comments for FPDF_LoadDocument() regarding the encoding for
// |password|.
// Notes:
// If PDFium is built with the XFA module, the application should call
// FPDF_LoadXFA() function after the PDF document loaded to support XFA
// fields defined in the fpdfformfill.h file.
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadMemDocument64(const void* data_buf,
size_t size,
FPDF_BYTESTRING password);
// Structure for custom file access.
typedef struct {
// File length, in bytes.
unsigned long m_FileLen;
// A function pointer for getting a block of data from a specific position.
// Position is specified by byte offset from the beginning of the file.
// The pointer to the buffer is never NULL and the size is never 0.
// The position and size will never go out of range of the file length.
// It may be possible for PDFium to call this function multiple times for
// the same position.
// Return value: should be non-zero if successful, zero for error.
int (*m_GetBlock)(void* param,
unsigned long position,
unsigned char* pBuf,
unsigned long size);
// A custom pointer for all implementation specific data. This pointer will
// be used as the first parameter to the m_GetBlock callback.
void* m_Param;
} FPDF_FILEACCESS;
// Structure for file reading or writing (I/O).
//
// Note: This is a handler and should be implemented by callers,
// and is only used from XFA.
typedef struct FPDF_FILEHANDLER_ {
// User-defined data.
// Note: Callers can use this field to track controls.
void* clientData;
// Callback function to release the current file stream object.
//
// Parameters:
// clientData - Pointer to user-defined data.
// Returns:
// None.
void (*Release)(void* clientData);
// Callback function to retrieve the current file stream size.
//
// Parameters:
// clientData - Pointer to user-defined data.
// Returns:
// Size of file stream.
FPDF_DWORD (*GetSize)(void* clientData);
// Callback function to read data from the current file stream.
//
// Parameters:
// clientData - Pointer to user-defined data.
// offset - Offset position starts from the beginning of file
// stream. This parameter indicates reading position.
// buffer - Memory buffer to store data which are read from
// file stream. This parameter should not be NULL.
// size - Size of data which should be read from file stream,
// in bytes. The buffer indicated by |buffer| must be
// large enough to store specified data.
// Returns:
// 0 for success, other value for failure.
FPDF_RESULT (*ReadBlock)(void* clientData,
FPDF_DWORD offset,
void* buffer,
FPDF_DWORD size);
// Callback function to write data into the current file stream.
//
// Parameters:
// clientData - Pointer to user-defined data.
// offset - Offset position starts from the beginning of file
// stream. This parameter indicates writing position.
// buffer - Memory buffer contains data which is written into
// file stream. This parameter should not be NULL.
// size - Size of data which should be written into file
// stream, in bytes.
// Returns:
// 0 for success, other value for failure.
FPDF_RESULT (*WriteBlock)(void* clientData,
FPDF_DWORD offset,
const void* buffer,
FPDF_DWORD size);
// Callback function to flush all internal accessing buffers.
//
// Parameters:
// clientData - Pointer to user-defined data.
// Returns:
// 0 for success, other value for failure.
FPDF_RESULT (*Flush)(void* clientData);
// Callback function to change file size.
//
// Description:
// This function is called under writing mode usually. Implementer
// can determine whether to realize it based on application requests.
// Parameters:
// clientData - Pointer to user-defined data.
// size - New size of file stream, in bytes.
// Returns:
// 0 for success, other value for failure.
FPDF_RESULT (*Truncate)(void* clientData, FPDF_DWORD size);
} FPDF_FILEHANDLER;
// Function: FPDF_LoadCustomDocument
// Load PDF document from a custom access descriptor.
// Parameters:
// pFileAccess - A structure for accessing the file.
// password - Optional password for decrypting the PDF file.
// Return value:
// A handle to the loaded document, or NULL on failure.
// Comments:
// The application must keep the file resources |pFileAccess| points to
// valid until the returned FPDF_DOCUMENT is closed. |pFileAccess|
// itself does not need to outlive the FPDF_DOCUMENT.
//
// The loaded document can be closed with FPDF_CloseDocument().
//
// See the comments for FPDF_LoadDocument() regarding the encoding for
// |password|.
// Notes:
// If PDFium is built with the XFA module, the application should call
// FPDF_LoadXFA() function after the PDF document loaded to support XFA
// fields defined in the fpdfformfill.h file.
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess, FPDF_BYTESTRING password);
// Function: FPDF_GetFileVersion
// Get the file version of the given PDF document.
// Parameters:
// doc - Handle to a document.
// fileVersion - The PDF file version. File version: 14 for 1.4, 15
// for 1.5, ...
// Return value:
// True if succeeds, false otherwise.
// Comments:
// If the document was created by FPDF_CreateNewDocument,
// then this function will always fail.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc,
int* fileVersion);
#define FPDF_ERR_SUCCESS 0 // No error.
#define FPDF_ERR_UNKNOWN 1 // Unknown error.
#define FPDF_ERR_FILE 2 // File not found or could not be opened.
#define FPDF_ERR_FORMAT 3 // File not in PDF format or corrupted.
#define FPDF_ERR_PASSWORD 4 // Password required or incorrect password.
#define FPDF_ERR_SECURITY 5 // Unsupported security scheme.
#define FPDF_ERR_PAGE 6 // Page not found or content error.
#ifdef PDF_ENABLE_XFA
#define FPDF_ERR_XFALOAD 7 // Load XFA error.
#define FPDF_ERR_XFALAYOUT 8 // Layout XFA error.
#endif // PDF_ENABLE_XFA
// Function: FPDF_GetLastError
// Get last error code when a function fails.
// Parameters:
// None.
// Return value:
// A 32-bit integer indicating error code as defined above.
// Comments:
// If the previous SDK call succeeded, the return value of this
// function is not defined. This function only works in conjunction
// with APIs that mention FPDF_GetLastError() in their documentation.
FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetLastError();
// Experimental API.
// Function: FPDF_DocumentHasValidCrossReferenceTable
// Whether the document's cross reference table is valid or not.
// Parameters:
// document - Handle to a document. Returned by FPDF_LoadDocument.
// Return value:
// True if the PDF parser did not encounter problems parsing the cross
// reference table. False if the parser could not parse the cross
// reference table and the table had to be rebuild from other data
// within the document.
// Comments:
// The return value can change over time as the PDF parser evolves.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_DocumentHasValidCrossReferenceTable(FPDF_DOCUMENT document);
// Experimental API.
// Function: FPDF_GetTrailerEnds
// Get the byte offsets of trailer ends.
// Parameters:
// document - Handle to document. Returned by FPDF_LoadDocument().
// buffer - The address of a buffer that receives the
// byte offsets.
// length - The size, in ints, of |buffer|.
// Return value:
// Returns the number of ints in the buffer on success, 0 on error.
//
// |buffer| is an array of integers that describes the exact byte offsets of the
// trailer ends in the document. If |length| is less than the returned length,
// or |document| or |buffer| is NULL, |buffer| will not be modified.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_GetTrailerEnds(FPDF_DOCUMENT document,
unsigned int* buffer,
unsigned long length);
// Function: FPDF_GetDocPermissions
// Get file permission flags of the document.
// Parameters:
// document - Handle to a document. Returned by FPDF_LoadDocument.
// Return value:
// A 32-bit integer indicating permission flags. Please refer to the
// PDF Reference for detailed descriptions. If the document is not
// protected or was unlocked by the owner, 0xffffffff will be returned.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_GetDocPermissions(FPDF_DOCUMENT document);
// Function: FPDF_GetDocUserPermissions
// Get user file permission flags of the document.
// Parameters:
// document - Handle to a document. Returned by FPDF_LoadDocument.
// Return value:
// A 32-bit integer indicating permission flags. Please refer to the
// PDF Reference for detailed descriptions. If the document is not
// protected, 0xffffffff will be returned. Always returns user
// permissions, even if the document was unlocked by the owner.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_GetDocUserPermissions(FPDF_DOCUMENT document);
// Function: FPDF_GetSecurityHandlerRevision
// Get the revision for the security handler.
// Parameters:
// document - Handle to a document. Returned by FPDF_LoadDocument.
// Return value:
// The security handler revision number. Please refer to the PDF
// Reference for a detailed description. If the document is not
// protected, -1 will be returned.
FPDF_EXPORT int FPDF_CALLCONV
FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document);
// Function: FPDF_GetPageCount
// Get total number of pages in the document.
// Parameters:
// document - Handle to document. Returned by FPDF_LoadDocument.
// Return value:
// Total number of pages in the document.
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageCount(FPDF_DOCUMENT document);
// Function: FPDF_LoadPage
// Load a page inside the document.
// Parameters:
// document - Handle to document. Returned by FPDF_LoadDocument
// page_index - Index number of the page. 0 for the first page.
// Return value:
// A handle to the loaded page, or NULL if page load fails.
// Comments:
// The loaded page can be rendered to devices using FPDF_RenderPage.
// The loaded page can be closed using FPDF_ClosePage.
FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV FPDF_LoadPage(FPDF_DOCUMENT document,
int page_index);
// Experimental API
// Function: FPDF_GetPageWidthF
// Get page width.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage().
// Return value:
// Page width (excluding non-displayable area) measured in points.
// One point is 1/72 inch (around 0.3528 mm).
FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageWidthF(FPDF_PAGE page);
// Function: FPDF_GetPageWidth
// Get page width.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage.
// Return value:
// Page width (excluding non-displayable area) measured in points.
// One point is 1/72 inch (around 0.3528 mm).
// Note:
// Prefer FPDF_GetPageWidthF() above. This will be deprecated in the
// future.
FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageWidth(FPDF_PAGE page);
// Experimental API
// Function: FPDF_GetPageHeightF
// Get page height.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage().
// Return value:
// Page height (excluding non-displayable area) measured in points.
// One point is 1/72 inch (around 0.3528 mm)
FPDF_EXPORT float FPDF_CALLCONV FPDF_GetPageHeightF(FPDF_PAGE page);
// Function: FPDF_GetPageHeight
// Get page height.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage.
// Return value:
// Page height (excluding non-displayable area) measured in points.
// One point is 1/72 inch (around 0.3528 mm)
// Note:
// Prefer FPDF_GetPageHeightF() above. This will be deprecated in the
// future.
FPDF_EXPORT double FPDF_CALLCONV FPDF_GetPageHeight(FPDF_PAGE page);
// Experimental API.
// Function: FPDF_GetPageBoundingBox
// Get the bounding box of the page. This is the intersection between
// its media box and its crop box.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage.
// rect - Pointer to a rect to receive the page bounding box.
// On an error, |rect| won't be filled.
// Return value:
// True for success.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetPageBoundingBox(FPDF_PAGE page,
FS_RECTF* rect);
// Experimental API.
// Function: FPDF_GetPageSizeByIndexF
// Get the size of the page at the given index.
// Parameters:
// document - Handle to document. Returned by FPDF_LoadDocument().
// page_index - Page index, zero for the first page.
// size - Pointer to a FS_SIZEF to receive the page size.
// (in points).
// Return value:
// Non-zero for success. 0 for error (document or page not found).
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_GetPageSizeByIndexF(FPDF_DOCUMENT document,
int page_index,
FS_SIZEF* size);
// Function: FPDF_GetPageSizeByIndex
// Get the size of the page at the given index.
// Parameters:
// document - Handle to document. Returned by FPDF_LoadDocument.
// page_index - Page index, zero for the first page.
// width - Pointer to a double to receive the page width
// (in points).
// height - Pointer to a double to receive the page height
// (in points).
// Return value:
// Non-zero for success. 0 for error (document or page not found).
// Note:
// Prefer FPDF_GetPageSizeByIndexF() above. This will be deprecated in
// the future.
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document,
int page_index,
double* width,
double* height);
// Page rendering flags. They can be combined with bit-wise OR.
//
// Set if annotations are to be rendered.
#define FPDF_ANNOT 0x01
// Set if using text rendering optimized for LCD display. This flag will only
// take effect if anti-aliasing is enabled for text.
#define FPDF_LCD_TEXT 0x02
// Don't use the native text output available on some platforms
#define FPDF_NO_NATIVETEXT 0x04
// Grayscale output.
#define FPDF_GRAYSCALE 0x08
// Obsolete, has no effect, retained for compatibility.
#define FPDF_DEBUG_INFO 0x80
// Obsolete, has no effect, retained for compatibility.
#define FPDF_NO_CATCH 0x100
// Limit image cache size.
#define FPDF_RENDER_LIMITEDIMAGECACHE 0x200
// Always use halftone for image stretching.
#define FPDF_RENDER_FORCEHALFTONE 0x400
// Render for printing.
#define FPDF_PRINTING 0x800
// Set to disable anti-aliasing on text. This flag will also disable LCD
// optimization for text rendering.
#define FPDF_RENDER_NO_SMOOTHTEXT 0x1000
// Set to disable anti-aliasing on images.
#define FPDF_RENDER_NO_SMOOTHIMAGE 0x2000
// Set to disable anti-aliasing on paths.
#define FPDF_RENDER_NO_SMOOTHPATH 0x4000
// Set whether to render in a reverse Byte order, this flag is only used when
// rendering to a bitmap.
#define FPDF_REVERSE_BYTE_ORDER 0x10
// Set whether fill paths need to be stroked. This flag is only used when
// FPDF_COLORSCHEME is passed in, since with a single fill color for paths the
// boundaries of adjacent fill paths are less visible.
#define FPDF_CONVERT_FILL_TO_STROKE 0x20
// Struct for color scheme.
// Each should be a 32-bit value specifying the color, in 8888 ARGB format.
typedef struct FPDF_COLORSCHEME_ {
FPDF_DWORD path_fill_color;
FPDF_DWORD path_stroke_color;
FPDF_DWORD text_fill_color;
FPDF_DWORD text_stroke_color;
} FPDF_COLORSCHEME;
#ifdef _WIN32
// Function: FPDF_RenderPage
// Render contents of a page to a device (screen, bitmap, or printer).
// This function is only supported on Windows.
// Parameters:
// dc - Handle to the device context.
// page - Handle to the page. Returned by FPDF_LoadPage.
// start_x - Left pixel position of the display area in
// device coordinates.
// start_y - Top pixel position of the display area in device
// coordinates.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation:
// 0 (normal)
// 1 (rotated 90 degrees clockwise)
// 2 (rotated 180 degrees)
// 3 (rotated 90 degrees counter-clockwise)
// flags - 0 for normal display, or combination of flags
// defined above.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPage(HDC dc,
FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int flags);
#endif
// Function: FPDF_RenderPageBitmap
// Render contents of a page to a device independent bitmap.
// Parameters:
// bitmap - Handle to the device independent bitmap (as the
// output buffer). The bitmap handle can be created
// by FPDFBitmap_Create or retrieved from an image
// object by FPDFImageObj_GetBitmap.
// page - Handle to the page. Returned by FPDF_LoadPage
// start_x - Left pixel position of the display area in
// bitmap coordinates.
// start_y - Top pixel position of the display area in bitmap
// coordinates.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation:
// 0 (normal)
// 1 (rotated 90 degrees clockwise)
// 2 (rotated 180 degrees)
// 3 (rotated 90 degrees counter-clockwise)
// flags - 0 for normal display, or combination of the Page
// Rendering flags defined above. With the FPDF_ANNOT
// flag, it renders all annotations that do not require
// user-interaction, which are all annotations except
// widget and popup annotations.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPageBitmap(FPDF_BITMAP bitmap,
FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int flags);
// Function: FPDF_RenderPageBitmapWithMatrix
// Render contents of a page to a device independent bitmap.
// Parameters:
// bitmap - Handle to the device independent bitmap (as the
// output buffer). The bitmap handle can be created
// by FPDFBitmap_Create or retrieved by
// FPDFImageObj_GetBitmap.
// page - Handle to the page. Returned by FPDF_LoadPage.
// matrix - The transform matrix, which must be invertible.
// See PDF Reference 1.7, 4.2.2 Common Transformations.
// clipping - The rect to clip to in device coords.
// flags - 0 for normal display, or combination of the Page
// Rendering flags defined above. With the FPDF_ANNOT
// flag, it renders all annotations that do not require
// user-interaction, which are all annotations except
// widget and popup annotations.
// Return value:
// None. Note that behavior is undefined if det of |matrix| is 0.
FPDF_EXPORT void FPDF_CALLCONV
FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,
FPDF_PAGE page,
const FS_MATRIX* matrix,
const FS_RECTF* clipping,
int flags);
#if defined(PDF_USE_SKIA)
// Experimental API.
// Function: FPDF_RenderPageSkia
// Render contents of a page to a Skia SkCanvas.
// Parameters:
// canvas - SkCanvas to render to.
// page - Handle to the page.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_RenderPageSkia(FPDF_SKIA_CANVAS canvas,
FPDF_PAGE page,
int size_x,
int size_y);
#endif
// Function: FPDF_ClosePage
// Close a loaded PDF page.
// Parameters:
// page - Handle to the loaded page.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_ClosePage(FPDF_PAGE page);
// Function: FPDF_CloseDocument
// Close a loaded PDF document.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FPDF_CloseDocument(FPDF_DOCUMENT document);
// Function: FPDF_DeviceToPage
// Convert the screen coordinates of a point to page coordinates.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage.
// start_x - Left pixel position of the display area in
// device coordinates.
// start_y - Top pixel position of the display area in device
// coordinates.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation:
// 0 (normal)
// 1 (rotated 90 degrees clockwise)
// 2 (rotated 180 degrees)
// 3 (rotated 90 degrees counter-clockwise)
// device_x - X value in device coordinates to be converted.
// device_y - Y value in device coordinates to be converted.
// page_x - A pointer to a double receiving the converted X
// value in page coordinates.
// page_y - A pointer to a double receiving the converted Y
// value in page coordinates.
// Return value:
// Returns true if the conversion succeeds, and |page_x| and |page_y|
// successfully receives the converted coordinates.
// Comments:
// The page coordinate system has its origin at the left-bottom corner
// of the page, with the X-axis on the bottom going to the right, and
// the Y-axis on the left side going up.
//
// NOTE: this coordinate system can be altered when you zoom, scroll,
// or rotate a page, however, a point on the page should always have
// the same coordinate values in the page coordinate system.
//
// The device coordinate system is device dependent. For screen device,
// its origin is at the left-top corner of the window. However this
// origin can be altered by the Windows coordinate transformation
// utilities.
//
// You must make sure the start_x, start_y, size_x, size_y
// and rotate parameters have exactly same values as you used in
// the FPDF_RenderPage() function call.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_DeviceToPage(FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int device_x,
int device_y,
double* page_x,
double* page_y);
// Function: FPDF_PageToDevice
// Convert the page coordinates of a point to screen coordinates.
// Parameters:
// page - Handle to the page. Returned by FPDF_LoadPage.
// start_x - Left pixel position of the display area in
// device coordinates.
// start_y - Top pixel position of the display area in device
// coordinates.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation:
// 0 (normal)
// 1 (rotated 90 degrees clockwise)
// 2 (rotated 180 degrees)
// 3 (rotated 90 degrees counter-clockwise)
// page_x - X value in page coordinates.
// page_y - Y value in page coordinate.
// device_x - A pointer to an integer receiving the result X
// value in device coordinates.
// device_y - A pointer to an integer receiving the result Y
// value in device coordinates.
// Return value:
// Returns true if the conversion succeeds, and |device_x| and
// |device_y| successfully receives the converted coordinates.
// Comments:
// See comments for FPDF_DeviceToPage().
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_PageToDevice(FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
double page_x,
double page_y,
int* device_x,
int* device_y);
// Function: FPDFBitmap_Create
// Create a device independent bitmap (FXDIB).
// Parameters:
// width - The number of pixels in width for the bitmap.
// Must be greater than 0.
// height - The number of pixels in height for the bitmap.
// Must be greater than 0.
// alpha - A flag indicating whether the alpha channel is used.
// Non-zero for using alpha, zero for not using.
// Return value:
// The created bitmap handle, or NULL if a parameter error or out of
// memory.
// Comments:
// The bitmap always uses 4 bytes per pixel. The first byte is always
// double word aligned.
//
// The byte order is BGRx (the last byte unused if no alpha channel) or
// BGRA.
//
// The pixels in a horizontal line are stored side by side, with the
// left most pixel stored first (with lower memory address).
// Each line uses width * 4 bytes.
//
// Lines are stored one after another, with the top most line stored
// first. There is no gap between adjacent lines.
//
// This function allocates enough memory for holding all pixels in the
// bitmap, but it doesn't initialize the buffer. Applications can use
// FPDFBitmap_FillRect() to fill the bitmap using any color. If the OS
// allows it, this function can allocate up to 4 GB of memory.
FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_Create(int width,
int height,
int alpha);
// More DIB formats
// Unknown or unsupported format.
#define FPDFBitmap_Unknown 0
// Gray scale bitmap, one byte per pixel.
#define FPDFBitmap_Gray 1
// 3 bytes per pixel, byte order: blue, green, red.
#define FPDFBitmap_BGR 2
// 4 bytes per pixel, byte order: blue, green, red, unused.
#define FPDFBitmap_BGRx 3
// 4 bytes per pixel, byte order: blue, green, red, alpha.
#define FPDFBitmap_BGRA 4
// Function: FPDFBitmap_CreateEx
// Create a device independent bitmap (FXDIB)
// Parameters:
// width - The number of pixels in width for the bitmap.
// Must be greater than 0.
// height - The number of pixels in height for the bitmap.
// Must be greater than 0.
// format - A number indicating for bitmap format, as defined
// above.
// first_scan - A pointer to the first byte of the first line if
// using an external buffer. If this parameter is NULL,
// then a new buffer will be created.
// stride - Number of bytes for each scan line. The value must
// be 0 or greater. When the value is 0,
// FPDFBitmap_CreateEx() will automatically calculate
// the appropriate value using |width| and |format|.
// When using an external buffer, it is recommended for
// the caller to pass in the value.
// When not using an external buffer, it is recommended
// for the caller to pass in 0.
// Return value:
// The bitmap handle, or NULL if parameter error or out of memory.
// Comments:
// Similar to FPDFBitmap_Create function, but allows for more formats
// and an external buffer is supported. The bitmap created by this
// function can be used in any place that a FPDF_BITMAP handle is
// required.
//
// If an external buffer is used, then the caller should destroy the
// buffer. FPDFBitmap_Destroy() will not destroy the buffer.
//
// It is recommended to use FPDFBitmap_GetStride() to get the stride
// value.
FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV FPDFBitmap_CreateEx(int width,
int height,
int format,
void* first_scan,
int stride);
// Function: FPDFBitmap_GetFormat
// Get the format of the bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// The format of the bitmap.
// Comments:
// Only formats supported by FPDFBitmap_CreateEx are supported by this
// function; see the list of such formats above.
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetFormat(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_FillRect
// Fill a rectangle in a bitmap.
// Parameters:
// bitmap - The handle to the bitmap. Returned by
// FPDFBitmap_Create.
// left - The left position. Starting from 0 at the
// left-most pixel.
// top - The top position. Starting from 0 at the
// top-most line.
// width - Width in pixels to be filled.
// height - Height in pixels to be filled.
// color - A 32-bit value specifing the color, in 8888 ARGB
// format.
// Return value:
// None.
// Comments:
// This function sets the color and (optionally) alpha value in the
// specified region of the bitmap.
//
// NOTE: If the alpha channel is used, this function does NOT
// composite the background with the source color, instead the
// background will be replaced by the source color and the alpha.
//
// If the alpha channel is not used, the alpha parameter is ignored.
FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_FillRect(FPDF_BITMAP bitmap,
int left,
int top,
int width,
int height,
FPDF_DWORD color);
// Function: FPDFBitmap_GetBuffer
// Get data buffer of a bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// The pointer to the first byte of the bitmap buffer.
// Comments:
// The stride may be more than width * number of bytes per pixel
//
// Applications can use this function to get the bitmap buffer pointer,
// then manipulate any color and/or alpha values for any pixels in the
// bitmap.
//
// Use FPDFBitmap_GetFormat() to find out the format of the data.
FPDF_EXPORT void* FPDF_CALLCONV FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_GetWidth
// Get width of a bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// The width of the bitmap in pixels.
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetWidth(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_GetHeight
// Get height of a bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// The height of the bitmap in pixels.
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetHeight(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_GetStride
// Get number of bytes for each line in the bitmap buffer.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// The number of bytes for each line in the bitmap buffer.
// Comments:
// The stride may be more than width * number of bytes per pixel.
FPDF_EXPORT int FPDF_CALLCONV FPDFBitmap_GetStride(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_Destroy
// Destroy a bitmap and release all related buffers.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create
// or FPDFImageObj_GetBitmap.
// Return value:
// None.
// Comments:
// This function will not destroy any external buffers provided when
// the bitmap was created.
FPDF_EXPORT void FPDF_CALLCONV FPDFBitmap_Destroy(FPDF_BITMAP bitmap);
// Function: FPDF_VIEWERREF_GetPrintScaling
// Whether the PDF document prefers to be scaled or not.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// None.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintScaling(FPDF_DOCUMENT document);
// Function: FPDF_VIEWERREF_GetNumCopies
// Returns the number of copies to be printed.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// The number of copies to be printed.
FPDF_EXPORT int FPDF_CALLCONV
FPDF_VIEWERREF_GetNumCopies(FPDF_DOCUMENT document);
// Function: FPDF_VIEWERREF_GetPrintPageRange
// Page numbers to initialize print dialog box when file is printed.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// The print page range to be used for printing.
FPDF_EXPORT FPDF_PAGERANGE FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document);
// Experimental API.
// Function: FPDF_VIEWERREF_GetPrintPageRangeCount
// Returns the number of elements in a FPDF_PAGERANGE.
// Parameters:
// pagerange - Handle to the page range.
// Return value:
// The number of elements in the page range. Returns 0 on error.
FPDF_EXPORT size_t FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintPageRangeCount(FPDF_PAGERANGE pagerange);
// Experimental API.
// Function: FPDF_VIEWERREF_GetPrintPageRangeElement
// Returns an element from a FPDF_PAGERANGE.
// Parameters:
// pagerange - Handle to the page range.
// index - Index of the element.
// Return value:
// The value of the element in the page range at a given index.
// Returns -1 on error.
FPDF_EXPORT int FPDF_CALLCONV
FPDF_VIEWERREF_GetPrintPageRangeElement(FPDF_PAGERANGE pagerange, size_t index);
// Function: FPDF_VIEWERREF_GetDuplex
// Returns the paper handling option to be used when printing from
// the print dialog.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// The paper handling option to be used when printing.
FPDF_EXPORT FPDF_DUPLEXTYPE FPDF_CALLCONV
FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT document);
// Function: FPDF_VIEWERREF_GetName
// Gets the contents for a viewer ref, with a given key. The value must
// be of type "name".
// Parameters:
// document - Handle to the loaded document.
// key - Name of the key in the viewer pref dictionary,
// encoded in UTF-8.
// buffer - Caller-allocate buffer to receive the key, or NULL
// - to query the required length.
// length - Length of the buffer.
// Return value:
// The number of bytes in the contents, including the NULL terminator.
// Thus if the return value is 0, then that indicates an error, such
// as when |document| is invalid. If |length| is less than the required
// length, or |buffer| is NULL, |buffer| will not be modified.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FPDF_VIEWERREF_GetName(FPDF_DOCUMENT document,
FPDF_BYTESTRING key,
char* buffer,
unsigned long length);
// Function: FPDF_CountNamedDests
// Get the count of named destinations in the PDF document.
// Parameters:
// document - Handle to a document
// Return value:
// The count of named destinations.
FPDF_EXPORT FPDF_DWORD FPDF_CALLCONV
FPDF_CountNamedDests(FPDF_DOCUMENT document);
// Function: FPDF_GetNamedDestByName
// Get a the destination handle for the given name.
// Parameters:
// document - Handle to the loaded document.
// name - The name of a destination.
// Return value:
// The handle to the destination.
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
FPDF_GetNamedDestByName(FPDF_DOCUMENT document, FPDF_BYTESTRING name);
// Function: FPDF_GetNamedDest
// Get the named destination by index.
// Parameters:
// document - Handle to a document
// index - The index of a named destination.
// buffer - The buffer to store the destination name,
// used as wchar_t*.
// buflen [in/out] - Size of the buffer in bytes on input,
// length of the result in bytes on output
// or -1 if the buffer is too small.
// Return value:
// The destination handle for a given index, or NULL if there is no
// named destination corresponding to |index|.
// Comments:
// Call this function twice to get the name of the named destination:
// 1) First time pass in |buffer| as NULL and get buflen.
// 2) Second time pass in allocated |buffer| and buflen to retrieve
// |buffer|, which should be used as wchar_t*.
//
// If buflen is not sufficiently large, it will be set to -1 upon
// return.
FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDF_GetNamedDest(FPDF_DOCUMENT document,
int index,
void* buffer,
long* buflen);
// Experimental API.
// Function: FPDF_GetXFAPacketCount
// Get the number of valid packets in the XFA entry.
// Parameters:
// document - Handle to the document.
// Return value:
// The number of valid packets, or -1 on error.
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetXFAPacketCount(FPDF_DOCUMENT document);
// Experimental API.
// Function: FPDF_GetXFAPacketName
// Get the name of a packet in the XFA array.
// Parameters:
// document - Handle to the document.
// index - Index number of the packet. 0 for the first packet.
// buffer - Buffer for holding the name of the XFA packet.
// buflen - Length of |buffer| in bytes.
// Return value:
// The length of the packet name in bytes, or 0 on error.
//
// |document| must be valid and |index| must be in the range [0, N), where N is
// the value returned by FPDF_GetXFAPacketCount().
// |buffer| is only modified if it is non-NULL and |buflen| is greater than or
// equal to the length of the packet name. The packet name includes a
// terminating NUL character. |buffer| is unmodified on error.
FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetXFAPacketName(
FPDF_DOCUMENT document,
int index,
void* buffer,
unsigned long buflen);
// Experimental API.
// Function: FPDF_GetXFAPacketContent
// Get the content of a packet in the XFA array.
// Parameters:
// document - Handle to the document.
// index - Index number of the packet. 0 for the first packet.
// buffer - Buffer for holding the content of the XFA packet.
// buflen - Length of |buffer| in bytes.
// out_buflen - Pointer to the variable that will receive the minimum
// buffer size needed to contain the content of the XFA
// packet.
// Return value:
// Whether the operation succeeded or not.
//
// |document| must be valid and |index| must be in the range [0, N), where N is
// the value returned by FPDF_GetXFAPacketCount(). |out_buflen| must not be
// NULL. When the aforementioned arguments are valid, the operation succeeds,
// and |out_buflen| receives the content size. |buffer| is only modified if
// |buffer| is non-null and long enough to contain the content. Callers must
// check both the return value and the input |buflen| is no less than the
// returned |out_buflen| before using the data in |buffer|.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetXFAPacketContent(
FPDF_DOCUMENT document,
int index,
void* buffer,
unsigned long buflen,
unsigned long* out_buflen);
#ifdef PDF_ENABLE_V8
// Function: FPDF_GetRecommendedV8Flags
// Returns a space-separated string of command line flags that are
// recommended to be passed into V8 via V8::SetFlagsFromString()
// prior to initializing the PDFium library.
// Parameters:
// None.
// Return value:
// NUL-terminated string of the form "--flag1 --flag2".
// The caller must not attempt to modify or free the result.
FPDF_EXPORT const char* FPDF_CALLCONV FPDF_GetRecommendedV8Flags();
// Experimental API.
// Function: FPDF_GetArrayBufferAllocatorSharedInstance()
// Helper function for initializing V8 isolates that will
// use PDFium's internal memory management.
// Parameters:
// None.
// Return Value:
// Pointer to a suitable v8::ArrayBuffer::Allocator, returned
// as void for C compatibility.
// Notes:
// Use is optional, but allows external creation of isolates
// matching the ones PDFium will make when none is provided
// via |FPDF_LIBRARY_CONFIG::m_pIsolate|.
//
// Can only be called when the library is in an uninitialized or
// destroyed state.
FPDF_EXPORT void* FPDF_CALLCONV FPDF_GetArrayBufferAllocatorSharedInstance();
#endif // PDF_ENABLE_V8
#ifdef PDF_ENABLE_XFA
// Function: FPDF_BStr_Init
// Helper function to initialize a FPDF_BSTR.
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Init(FPDF_BSTR* bstr);
// Function: FPDF_BStr_Set
// Helper function to copy string data into the FPDF_BSTR.
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Set(FPDF_BSTR* bstr,
const char* cstr,
int length);
// Function: FPDF_BStr_Clear
// Helper function to clear a FPDF_BSTR.
FPDF_EXPORT FPDF_RESULT FPDF_CALLCONV FPDF_BStr_Clear(FPDF_BSTR* bstr);
#endif // PDF_ENABLE_XFA
#ifdef __cplusplus
}
#endif
#endif // PUBLIC_FPDFVIEW_H_