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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
#ifndef PUBLIC_FPDF_EDIT_H_
#define PUBLIC_FPDF_EDIT_H_
#include <stdint.h>
#include "fpdfview.h"
#define FPDF_ARGB(a, r, g, b) \
((uint32_t)(((uint32_t)(b)&0xff) | (((uint32_t)(g)&0xff) << 8) | \
(((uint32_t)(r)&0xff) << 16) | (((uint32_t)(a)&0xff) << 24)))
#define FPDF_GetBValue(argb) ((uint8_t)(argb))
#define FPDF_GetGValue(argb) ((uint8_t)(((uint16_t)(argb)) >> 8))
#define FPDF_GetRValue(argb) ((uint8_t)((argb) >> 16))
#define FPDF_GetAValue(argb) ((uint8_t)((argb) >> 24))
// The page object constants.
#define FPDF_PAGEOBJ_TEXT 1
#define FPDF_PAGEOBJ_PATH 2
#define FPDF_PAGEOBJ_IMAGE 3
#define FPDF_PAGEOBJ_SHADING 4
#define FPDF_PAGEOBJ_FORM 5
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
// Create a new PDF document.
//
// Returns a handle to a new document, or NULL on failure.
DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_CreateNewDocument();
// Create a new PDF page.
//
// document - handle to document.
// page_index - suggested index of the page to create. If it is larger than
// document's current last index(L), the created page index is
// the next available index -- L+1.
// width - the page width.
// height - the page height.
//
// Returns the handle to the new page.
//
// The page should be closed with CPDF_ClosePage() when finished as
// with any other page in the document.
DLLEXPORT FPDF_PAGE STDCALL FPDFPage_New(FPDF_DOCUMENT document,
int page_index,
double width,
double height);
// Delete the page at |page_index|.
//
// document - handle to document.
// page_index - the index of the page to delete.
DLLEXPORT void STDCALL FPDFPage_Delete(FPDF_DOCUMENT document, int page_index);
// Get the rotation of |page|.
//
// page - handle to a page
//
// Returns one of the following indicating the page rotation:
// 0 - No rotation.
// 1 - Rotated 90 degrees clockwise.
// 2 - Rotated 180 degrees clockwise.
// 3 - Rotated 270 degrees clockwise.
DLLEXPORT int STDCALL FPDFPage_GetRotation(FPDF_PAGE page);
// Set rotation for |page|.
//
// page - handle to a page.
// rotate - the rotation value, one of:
// 0 - No rotation.
// 1 - Rotated 90 degrees clockwise.
// 2 - Rotated 180 degrees clockwise.
// 3 - Rotated 270 degrees clockwise.
DLLEXPORT void STDCALL FPDFPage_SetRotation(FPDF_PAGE page, int rotate);
// Insert |page_obj| into |page|.
//
// page - handle to a page
// page_obj - handle to a page object. The |page_obj| will be automatically
// freed.
DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page,
FPDF_PAGEOBJECT page_obj);
// Get number of page objects inside |page|.
//
// page - handle to a page.
//
// Returns the number of objects in |page|.
DLLEXPORT int STDCALL FPDFPage_CountObject(FPDF_PAGE page);
// Get object in |page| at |index|.
//
// page - handle to a page.
// index - the index of a page object.
//
// Returns the handle to the page object, or NULL on failed.
DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page, int index);
// Checks if |page| contains transparency.
//
// page - handle to a page.
//
// Returns TRUE if |page| contains transparency.
DLLEXPORT FPDF_BOOL STDCALL FPDFPage_HasTransparency(FPDF_PAGE page);
// Generate the content of |page|.
//
// page - handle to a page.
//
// Returns TRUE on success.
//
// Before you save the page to a file, or reload the page, you must call
// |FPDFPage_GenerateContent| or any changes to |page| will be lost.
DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GenerateContent(FPDF_PAGE page);
// Checks if |pageObject| contains transparency.
//
// pageObject - handle to a page object.
//
// Returns TRUE if |pageObject| contains transparency.
DLLEXPORT FPDF_BOOL STDCALL
FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT pageObject);
// Transform |pageObject| by the given matrix.
//
// page_object - handle to a page object.
// a - matrix value.
// b - matrix value.
// c - matrix value.
// d - matrix value.
// e - matrix value.
// f - matrix value.
//
// The matrix is composed as:
// |a c e|
// |b d f|
// and can be used to scale, rotate, shear and translate the |page_object|.
DLLEXPORT void STDCALL FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object,
double a,
double b,
double c,
double d,
double e,
double f);
// Transform all annotations in |page|.
//
// page - handle to a page.
// a - matrix value.
// b - matrix value.
// c - matrix value.
// d - matrix value.
// e - matrix value.
// f - matrix value.
//
// The matrix is composed as:
// |a c e|
// |b d f|
// and can be used to scale, rotate, shear and translate the |page| annotations.
DLLEXPORT void STDCALL FPDFPage_TransformAnnots(FPDF_PAGE page,
double a,
double b,
double c,
double d,
double e,
double f);
// Create a new image object.
//
// document - handle to a document.
//
// Returns a handle to a new image object.
DLLEXPORT FPDF_PAGEOBJECT STDCALL
FPDFPageObj_NewImgeObj(FPDF_DOCUMENT document);
// Load an image from a JPEG image file and then set it into |image_object|.
//
// pages - pointer to the start of all loaded pages, may be NULL.
// nCount - number of |pages|, may be 0.
// image_object - handle to an image object.
// fileAccess - file access handler which specifies the JPEG image file.
//
// Returns TRUE on success.
//
// The image object might already have an associated image, which is shared and
// cached by the loaded pages. In that case, we need to clear the cached image
// for all the loaded pages. Pass |pages| and page count (|nCount|) to this API
// to clear the image cache. If the image is not previously shared, or NULL is a
// valid |pages| value.
DLLEXPORT FPDF_BOOL STDCALL
FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages,
int nCount,
FPDF_PAGEOBJECT image_object,
FPDF_FILEACCESS* fileAccess);
// Set the transform matrix of |image_object|.
//
// image_object - handle to an image object.
// a - matrix value.
// b - matrix value.
// c - matrix value.
// d - matrix value.
// e - matrix value.
// f - matrix value.
//
// The matrix is composed as:
// |a c e|
// |b d f|
// and can be used to scale, rotate, shear and translate the |page| annotations.
//
// Returns TRUE on success.
DLLEXPORT FPDF_BOOL STDCALL FPDFImageObj_SetMatrix(FPDF_PAGEOBJECT image_object,
double a,
double b,
double c,
double d,
double e,
double f);
// Set |bitmap| to |image_object|.
//
// pages - pointer to the start of all loaded pages, may be NULL.
// nCount - number of |pages|, may be 0.
// image_object - handle to an image object.
// bitmap - handle of the bitmap.
//
// Returns TRUE on success.
DLLEXPORT FPDF_BOOL STDCALL FPDFImageObj_SetBitmap(FPDF_PAGE* pages,
int nCount,
FPDF_PAGEOBJECT image_object,
FPDF_BITMAP bitmap);
#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus
#endif // PUBLIC_FPDF_EDIT_H_
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