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268 lines
9.6 KiB
C
268 lines
9.6 KiB
C
// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef PUBLIC_FPDF_EDIT_H_
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#define PUBLIC_FPDF_EDIT_H_
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#include <stdint.h>
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// NOLINTNEXTLINE(build/include)
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#include "fpdfview.h"
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#define FPDF_ARGB(a, r, g, b) \
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((uint32_t)(((uint32_t)(b)&0xff) | (((uint32_t)(g)&0xff) << 8) | \
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(((uint32_t)(r)&0xff) << 16) | (((uint32_t)(a)&0xff) << 24)))
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#define FPDF_GetBValue(argb) ((uint8_t)(argb))
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#define FPDF_GetGValue(argb) ((uint8_t)(((uint16_t)(argb)) >> 8))
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#define FPDF_GetRValue(argb) ((uint8_t)((argb) >> 16))
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#define FPDF_GetAValue(argb) ((uint8_t)((argb) >> 24))
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// The page object constants.
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#define FPDF_PAGEOBJ_TEXT 1
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#define FPDF_PAGEOBJ_PATH 2
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#define FPDF_PAGEOBJ_IMAGE 3
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#define FPDF_PAGEOBJ_SHADING 4
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#define FPDF_PAGEOBJ_FORM 5
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#ifdef __cplusplus
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extern "C" {
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#endif // __cplusplus
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// Create a new PDF document.
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//
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// Returns a handle to a new document, or NULL on failure.
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DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_CreateNewDocument();
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// Create a new PDF page.
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//
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// document - handle to document.
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// page_index - suggested index of the page to create. If it is larger than
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// document's current last index(L), the created page index is
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// the next available index -- L+1.
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// width - the page width.
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// height - the page height.
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//
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// Returns the handle to the new page.
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//
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// The page should be closed with CPDF_ClosePage() when finished as
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// with any other page in the document.
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DLLEXPORT FPDF_PAGE STDCALL FPDFPage_New(FPDF_DOCUMENT document,
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int page_index,
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double width,
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double height);
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// Delete the page at |page_index|.
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//
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// document - handle to document.
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// page_index - the index of the page to delete.
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DLLEXPORT void STDCALL FPDFPage_Delete(FPDF_DOCUMENT document, int page_index);
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// Get the rotation of |page|.
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//
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// page - handle to a page
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//
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// Returns one of the following indicating the page rotation:
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// 0 - No rotation.
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// 1 - Rotated 90 degrees clockwise.
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// 2 - Rotated 180 degrees clockwise.
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// 3 - Rotated 270 degrees clockwise.
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DLLEXPORT int STDCALL FPDFPage_GetRotation(FPDF_PAGE page);
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// Set rotation for |page|.
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//
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// page - handle to a page.
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// rotate - the rotation value, one of:
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// 0 - No rotation.
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// 1 - Rotated 90 degrees clockwise.
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// 2 - Rotated 180 degrees clockwise.
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// 3 - Rotated 270 degrees clockwise.
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DLLEXPORT void STDCALL FPDFPage_SetRotation(FPDF_PAGE page, int rotate);
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// Insert |page_obj| into |page|.
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//
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// page - handle to a page
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// page_obj - handle to a page object. The |page_obj| will be automatically
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// freed.
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DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page,
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FPDF_PAGEOBJECT page_obj);
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// Get number of page objects inside |page|.
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//
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// page - handle to a page.
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//
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// Returns the number of objects in |page|.
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DLLEXPORT int STDCALL FPDFPage_CountObject(FPDF_PAGE page);
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// Get object in |page| at |index|.
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//
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// page - handle to a page.
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// index - the index of a page object.
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//
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// Returns the handle to the page object, or NULL on failed.
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DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page, int index);
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// Checks if |page| contains transparency.
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//
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// page - handle to a page.
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//
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// Returns TRUE if |page| contains transparency.
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DLLEXPORT FPDF_BOOL STDCALL FPDFPage_HasTransparency(FPDF_PAGE page);
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// Generate the content of |page|.
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//
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// page - handle to a page.
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//
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// Returns TRUE on success.
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//
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// Before you save the page to a file, or reload the page, you must call
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// |FPDFPage_GenerateContent| or any changes to |page| will be lost.
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DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GenerateContent(FPDF_PAGE page);
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// Checks if |pageObject| contains transparency.
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//
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// pageObject - handle to a page object.
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//
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// Returns TRUE if |pageObject| contains transparency.
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DLLEXPORT FPDF_BOOL STDCALL
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FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT pageObject);
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// Transform |pageObject| by the given matrix.
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//
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// page_object - handle to a page object.
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// a - matrix value.
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// b - matrix value.
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// c - matrix value.
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// d - matrix value.
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// e - matrix value.
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// f - matrix value.
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//
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// The matrix is composed as:
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// |a c e|
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// |b d f|
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// and can be used to scale, rotate, shear and translate the |page_object|.
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DLLEXPORT void STDCALL FPDFPageObj_Transform(FPDF_PAGEOBJECT page_object,
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double a,
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double b,
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double c,
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double d,
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double e,
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double f);
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// Transform all annotations in |page|.
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//
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// page - handle to a page.
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// a - matrix value.
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// b - matrix value.
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// c - matrix value.
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// d - matrix value.
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// e - matrix value.
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// f - matrix value.
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//
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// The matrix is composed as:
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// |a c e|
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// |b d f|
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// and can be used to scale, rotate, shear and translate the |page| annotations.
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DLLEXPORT void STDCALL FPDFPage_TransformAnnots(FPDF_PAGE page,
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double a,
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double b,
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double c,
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double d,
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double e,
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double f);
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// Create a new image object.
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//
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// document - handle to a document.
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//
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// Returns a handle to a new image object.
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DLLEXPORT FPDF_PAGEOBJECT STDCALL
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FPDFPageObj_NewImgeObj(FPDF_DOCUMENT document);
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// Load an image from a JPEG image file and then set it into |image_object|.
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//
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// pages - pointer to the start of all loaded pages, may be NULL.
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// nCount - number of |pages|, may be 0.
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// image_object - handle to an image object.
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// fileAccess - file access handler which specifies the JPEG image file.
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//
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// Returns TRUE on success.
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//
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// The image object might already have an associated image, which is shared and
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// cached by the loaded pages. In that case, we need to clear the cached image
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// for all the loaded pages. Pass |pages| and page count (|nCount|) to this API
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// to clear the image cache. If the image is not previously shared, or NULL is a
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// valid |pages| value.
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DLLEXPORT FPDF_BOOL STDCALL
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FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages,
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int nCount,
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FPDF_PAGEOBJECT image_object,
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FPDF_FILEACCESS* fileAccess);
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// Load an image from a JPEG image file and then set it into |image_object|.
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//
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// pages - pointer to the start of all loaded pages, may be NULL.
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// nCount - number of |pages|, may be 0.
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// image_object - handle to an image object.
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// fileAccess - file access handler which specifies the JPEG image file.
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//
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// Returns TRUE on success.
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//
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// The image object might already have an associated image, which is shared and
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// cached by the loaded pages. In that case, we need to clear the cached image
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// for all the loaded pages. Pass |pages| and page count (|nCount|) to this API
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// to clear the image cache. If the image is not previously shared, or NULL is a
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// valid |pages| value. This function loads the JPEG image inline, so the image
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// content is copied to the file. This allows |fileAccess| and its associated
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// data to be deleted after this function returns.
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DLLEXPORT FPDF_BOOL STDCALL
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FPDFImageObj_LoadJpegFileInline(FPDF_PAGE* pages,
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int nCount,
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FPDF_PAGEOBJECT image_object,
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FPDF_FILEACCESS* fileAccess);
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// Set the transform matrix of |image_object|.
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//
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// image_object - handle to an image object.
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// a - matrix value.
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// b - matrix value.
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// c - matrix value.
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// d - matrix value.
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// e - matrix value.
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// f - matrix value.
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//
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// The matrix is composed as:
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// |a c e|
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// |b d f|
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// and can be used to scale, rotate, shear and translate the |page| annotations.
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//
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// Returns TRUE on success.
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DLLEXPORT FPDF_BOOL STDCALL FPDFImageObj_SetMatrix(FPDF_PAGEOBJECT image_object,
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double a,
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double b,
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double c,
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double d,
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double e,
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double f);
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// Set |bitmap| to |image_object|.
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//
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// pages - pointer to the start of all loaded pages, may be NULL.
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// nCount - number of |pages|, may be 0.
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// image_object - handle to an image object.
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// bitmap - handle of the bitmap.
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//
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// Returns TRUE on success.
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DLLEXPORT FPDF_BOOL STDCALL FPDFImageObj_SetBitmap(FPDF_PAGE* pages,
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int nCount,
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FPDF_PAGEOBJECT image_object,
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FPDF_BITMAP bitmap);
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#ifdef __cplusplus
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} // extern "C"
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#endif // __cplusplus
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#endif // PUBLIC_FPDF_EDIT_H_
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