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PL286/external/pdfium/public/fpdfview.h

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// Copyright 2014 PDFium Authors. All rights reserved.
// 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
// 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_
#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 types
typedef void* FPDF_ACTION;
typedef void* FPDF_BITMAP;
typedef void* FPDF_BOOKMARK;
typedef void* FPDF_CLIPPATH;
typedef void* FPDF_DEST;
typedef void* FPDF_DOCSCHHANDLE;
typedef void* FPDF_DOCUMENT;
typedef void* FPDF_FONT;
typedef void* FPDF_HMODULE;
typedef void* FPDF_LINK;
typedef void* FPDF_MODULEMGR;
typedef void* FPDF_PAGE;
typedef void* FPDF_PAGELINK;
typedef void* FPDF_PAGEOBJECT; // Page object(text, path, etc)
typedef void* FPDF_PAGERANGE;
typedef void* FPDF_PATH;
typedef void* FPDF_RECORDER;
typedef void* FPDF_SCHHANDLE;
typedef void* FPDF_STRUCTELEMENT;
typedef void* FPDF_STRUCTTREE;
typedef void* FPDF_TEXTPAGE;
#ifdef PDF_ENABLE_XFA
typedef void* FPDF_STRINGHANDLE;
typedef void* FPDF_WIDGET;
#endif // PDF_ENABLE_XFA
// Basic data types
typedef int FPDF_BOOL;
typedef int FPDF_ERROR;
typedef unsigned long FPDF_DWORD;
typedef float FS_FLOAT;
#ifdef PDF_ENABLE_XFA
typedef void* FPDF_LPVOID;
typedef void const* FPDF_LPCVOID;
typedef char const* FPDF_LPCSTR;
typedef int FPDF_RESULT;
#endif
// Duplex types
typedef enum _FPDF_DUPLEXTYPE_ {
DuplexUndefined = 0,
Simplex,
DuplexFlipShortEdge,
DuplexFlipLongEdge
} FPDF_DUPLEXTYPE;
// String types
typedef unsigned short FPDF_WCHAR;
typedef unsigned char const* FPDF_LPCBYTE;
// FPDFSDK may use three types of strings: byte string, wide string (UTF-16LE
// encoded), and platform dependent string
typedef const char* FPDF_BYTESTRING;
// FPDFSDK always uses UTF-16LE encoded wide strings, each character uses 2
// bytes (except surrogation), with the low byte first.
typedef const unsigned short* FPDF_WIDESTRING;
#ifdef PDF_ENABLE_XFA
// Structure for a byte string.
// Note, a byte string commonly means a UTF-16LE formated string.
typedef struct _FPDF_BSTR {
// String buffer.
char* str;
// Length of the string, in bytes.
int len;
} FPDF_BSTR;
#endif // PDF_ENABLE_XFA
// 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.
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;
#if defined(_WIN32) && defined(FPDFSDK_EXPORTS)
// On Windows system, functions are exported in a DLL
#define DLLEXPORT __declspec(dllexport)
#define STDCALL __stdcall
#else
#define DLLEXPORT
#define STDCALL
#endif
// Exported Functions
#ifdef __cplusplus
extern "C" {
#endif
// Function: FPDF_InitLibrary
// Initialize the FPDFSDK library
// Parameters:
// None
// Return value:
// None.
// Comments:
// Convenience function to call FPDF_InitLibraryWithConfig() for
// backwards comatibility purposes.
DLLEXPORT void STDCALL FPDF_InitLibrary();
// Process-wide options for initializing the library.
typedef struct FPDF_LIBRARY_CONFIG_ {
// Version number of the interface. Currently must be 2.
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 between 0 and
// v8::Internals::kNumIsolateDataLots (exclusive). Note that 0 is fine
// for most embedders.
unsigned int m_v8EmbedderSlot;
} FPDF_LIBRARY_CONFIG;
// Function: FPDF_InitLibraryWithConfig
// Initialize the FPDFSDK library
// Parameters:
// config - configuration information as above.
// Return value:
// None.
// Comments:
// You have to call this function before you can call any PDF
// processing functions.
DLLEXPORT void STDCALL FPDF_InitLibraryWithConfig(
const FPDF_LIBRARY_CONFIG* config);
// Function: FPDF_DestroyLibary
// Release all resources allocated by the FPDFSDK library.
// Parameters:
// None.
// Return value:
// None.
// Comments:
// You can call this function to release all memory blocks allocated by
// the library.
// After this function is called, you should not call any PDF
// processing functions.
DLLEXPORT void STDCALL 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.
DLLEXPORT void STDCALL FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
FPDF_BOOL enable);
#if defined(_WIN32)
#if defined(PDFIUM_PRINT_TEXT_WITH_GDI)
// Pointer to a helper function to make |font| with |text| of |text_length|
// accessible when printing text with GDI. This is useful in sandboxed
// environments where PDFium's access to GDI may be restricted.
typedef void (*PDFiumEnsureTypefaceCharactersAccessible)(const LOGFONT* font,
const wchar_t* text,
size_t text_length);
// Function: FPDF_SetTypefaceAccessibleFunc
// Set the function pointer that makes GDI fonts available in sandboxed
// environments. Experimental API.
// Parameters:
// func - A function pointer. See description above.
// Return value:
// None.
DLLEXPORT void STDCALL
FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func);
// Function: FPDF_SetPrintTextWithGDI
// Set whether to use GDI to draw fonts when printing on Windows.
// Experimental API.
// Parameters:
// use_gdi - Set to true to enable printing text with GDI.
// Return value:
// None.
DLLEXPORT void STDCALL FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi);
#endif // PDFIUM_PRINT_TEXT_WITH_GDI
// Function: FPDF_SetPrintPostscriptLevel
// Set postscript printing level when printing on Windows.
// Experimental API.
// Parameters:
// postscript_level - 0 to disable postscript printing,
// 2 to print with postscript level 2,
// 3 to print with postscript level 3.
// All other values are invalid.
// Return value:
// True if successful, false if unsucessful (typically invalid input).
DLLEXPORT FPDF_BOOL STDCALL
FPDF_SetPrintPostscriptLevel(FPDF_BOOL postscript_level);
#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.
// 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.
DLLEXPORT FPDF_DOCUMENT STDCALL 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.
// 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.
DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadMemDocument(const void* data_buf,
int 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 position and size will never go out of range of the file length.
// It may be possible for FPDFSDK 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;
#ifdef PDF_ENABLE_XFA
/**
* @brief Structure for file reading or writing (I/O).
*
* @note This is a handler and should be implemented by callers.
*/
typedef struct _FPDF_FILEHANDLER {
/**
* @brief User-defined data.
* @note Callers can use this field to track controls.
*/
FPDF_LPVOID clientData;
/**
* @brief Callback function to release the current file stream object.
*
* @param[in] clientData Pointer to user-defined data.
*
* @return None.
*/
void (*Release)(FPDF_LPVOID clientData);
/**
* @brief Callback function to retrieve the current file stream size.
*
* @param[in] clientData Pointer to user-defined data.
*
* @return Size of file stream.
*/
FPDF_DWORD (*GetSize)(FPDF_LPVOID clientData);
/**
* @brief Callback function to read data from the current file stream.
*
* @param[in] clientData Pointer to user-defined data.
* @param[in] offset Offset position starts from the beginning of file
* stream. This parameter indicates reading position.
* @param[in] buffer Memory buffer to store data which are read from
* file stream. This parameter should not be <b>NULL</b>.
* @param[in] size Size of data which should be read from file
* stream, in bytes. The buffer indicated by the parameter <i>buffer</i>
* should be enough to store specified data.
*
* @return 0 for success, other value for failure.
*/
FPDF_RESULT (*ReadBlock)(FPDF_LPVOID clientData,
FPDF_DWORD offset,
FPDF_LPVOID buffer,
FPDF_DWORD size);
/**
* @brief Callback function to write data into the current file stream.
*
* @param[in] clientData Pointer to user-defined data.
* @param[in] offset Offset position starts from the beginning of file
* stream. This parameter indicates writing position.
* @param[in] buffer Memory buffer contains data which is written into
* file stream. This parameter should not be <b>NULL</b>.
* @param[in] size Size of data which should be written into file
* stream, in bytes.
*
* @return 0 for success, other value for failure.
*/
FPDF_RESULT (*WriteBlock)(FPDF_LPVOID clientData,
FPDF_DWORD offset,
FPDF_LPCVOID buffer,
FPDF_DWORD size);
/**
* @brief Callback function to flush all internal accessing buffers.
*
* @param[in] clientData Pointer to user-defined data.
*
* @return 0 for success, other value for failure.
*/
FPDF_RESULT (*Flush)(FPDF_LPVOID clientData);
/**
* @brief Callback function to change file size.
*
* @details This function is called under writing mode usually. Implementer
* can determine whether to realize it based on application requests.
*
* @param[in] clientData Pointer to user-defined data.
* @param[in] size New size of file stream, in bytes.
*
* @return 0 for success, other value for failure.
*/
FPDF_RESULT (*Truncate)(FPDF_LPVOID clientData, FPDF_DWORD size);
} FPDF_FILEHANDLER, *FPDF_LPFILEHANDLER;
#endif
// 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 valid until the PDF
// document is closed.
//
// The loaded document can be closed with FPDF_CloseDocument.
// 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.
DLLEXPORT FPDF_DOCUMENT STDCALL
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.
DLLEXPORT FPDF_BOOL STDCALL 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.
DLLEXPORT unsigned long STDCALL FPDF_GetLastError();
// Function: FPDF_GetDocPermission
// 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, 0xffffffff will be returned.
DLLEXPORT unsigned long STDCALL FPDF_GetDocPermissions(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.
DLLEXPORT int STDCALL 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.
DLLEXPORT int STDCALL 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.
DLLEXPORT FPDF_PAGE STDCALL FPDF_LoadPage(FPDF_DOCUMENT document,
int page_index);
// 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).
DLLEXPORT double STDCALL FPDF_GetPageWidth(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)
DLLEXPORT double STDCALL FPDF_GetPageHeight(FPDF_PAGE page);
// 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).
DLLEXPORT int STDCALL 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.
#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
// Set if you want to get some debug info.
#define FPDF_DEBUG_INFO 0x80
// Set if you don't want to catch exceptions.
#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.
#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
#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.
DLLEXPORT void STDCALL 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.
// 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.
DLLEXPORT void STDCALL 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.
// page - Handle to the page. Returned by FPDF_LoadPage
// matrix - The transform matrix.
// clipping - The rect to clip to.
// 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.
DLLEXPORT void STDCALL FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,
FPDF_PAGE page,
const FS_MATRIX* matrix,
const FS_RECTF* clipping,
int flags);
#ifdef _SKIA_SUPPORT_
DLLEXPORT FPDF_RECORDER STDCALL FPDF_RenderPageSkp(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.
DLLEXPORT void STDCALL FPDF_ClosePage(FPDF_PAGE page);
// Function: FPDF_CloseDocument
// Close a loaded PDF document.
// Parameters:
// document - Handle to the loaded document.
// Return value:
// None.
DLLEXPORT void STDCALL 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:
// None.
// 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.
DLLEXPORT void STDCALL 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:
// None.
// Comments:
// See comments for FPDF_DeviceToPage().
DLLEXPORT void STDCALL 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.
DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_Create(int width,
int height,
int alpha);
// More DIB formats
// 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 the a new buffer will be created.
// stride - Number of bytes for each scan line, for external
// buffer only.
// 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 application should destroy
// the buffer by itself. FPDFBitmap_Destroy function will not destroy
// the buffer.
DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width,
int height,
int format,
void* first_scan,
int stride);
// 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.
DLLEXPORT void STDCALL 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.
// 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.
//
// The data is in BGRA format. Where the A maybe unused if alpha was
// not specified.
DLLEXPORT void* STDCALL FPDFBitmap_GetBuffer(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_GetWidth
// Get width of a bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create.
// Return value:
// The width of the bitmap in pixels.
DLLEXPORT int STDCALL FPDFBitmap_GetWidth(FPDF_BITMAP bitmap);
// Function: FPDFBitmap_GetHeight
// Get height of a bitmap.
// Parameters:
// bitmap - Handle to the bitmap. Returned by FPDFBitmap_Create.
// Return value:
// The height of the bitmap in pixels.
DLLEXPORT int STDCALL 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.
// 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.
DLLEXPORT int STDCALL 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.
// Return value:
// None.
// Comments:
// This function will not destroy any external buffers provided when
// the bitmap was created.
DLLEXPORT void STDCALL 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.
DLLEXPORT FPDF_BOOL STDCALL
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.
DLLEXPORT int STDCALL 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.
DLLEXPORT FPDF_PAGERANGE STDCALL
FPDF_VIEWERREF_GetPrintPageRange(FPDF_DOCUMENT document);
// 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.
DLLEXPORT FPDF_DUPLEXTYPE STDCALL
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.
// buffer - A string to write the contents of the key to.
// 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 or |buffer| is NULL. If |length| is
// less than the returned length, or |buffer| is NULL, |buffer| will
// not be modified.
DLLEXPORT unsigned long STDCALL 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.
DLLEXPORT FPDF_DWORD STDCALL 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.
DLLEXPORT FPDF_DEST STDCALL 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.
DLLEXPORT FPDF_DEST STDCALL FPDF_GetNamedDest(FPDF_DOCUMENT document,
int index,
void* buffer,
long* buflen);
#ifdef PDF_ENABLE_XFA
// Function: FPDF_BStr_Init
// Helper function to initialize a byte string.
DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Init(FPDF_BSTR* str);
// Function: FPDF_BStr_Set
// Helper function to set string data.
DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Set(FPDF_BSTR* str,
FPDF_LPCSTR bstr,
int length);
// Function: FPDF_BStr_Clear
// Helper function to clear a byte string.
DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Clear(FPDF_BSTR* str);
#endif // PDF_ENABLE_XFA
#ifdef __cplusplus
}
#endif
#endif // PUBLIC_FPDFVIEW_H_