Remove the windows DLL

@@ -7,6 +7,7 @@
 - Implement pan and zoom on PdfPreview widget
 - Implement pan and zoom on PdfPreview widget
 - Improve orientation handling
 - Improve orientation handling
 - Improve directPrint
 - Improve directPrint
+- Remove the windows DLL
 
 
 ## 3.7.2
 ## 3.7.2
 
 

@@ -15,6 +15,3 @@ x86/
 *.[Cc]ache
 *.[Cc]ache
 # but keep track of directories ending in .cache
 # but keep track of directories ending in .cache
 !*.[Cc]ache/
 !*.[Cc]ache/
-
-!pdfium/x64
-!pdfium/x86

@@ -16,11 +16,22 @@ cmake_minimum_required(VERSION 3.15)
 set(PROJECT_NAME "printing")
 set(PROJECT_NAME "printing")
 project(${PROJECT_NAME} LANGUAGES CXX)
 project(${PROJECT_NAME} LANGUAGES CXX)
 
 
+set(ARCH "x64")
+
+# Download pdfium
+include(../windows/DownloadProject.cmake)
+download_project(
+  PROJ
+  pdfium
+  URL
+  https://github.com/bblanchon/pdfium-binaries/releases/latest/download/pdfium-windows-${ARCH}.zip
+  )
+
 # This value is used when generating builds using this plugin, so it must not be
 # This value is used when generating builds using this plugin, so it must not be
 # changed
 # changed
 set(PLUGIN_NAME "printing_plugin")
 set(PLUGIN_NAME "printing_plugin")
 
 
-include(pdfium/PDFiumConfig.cmake)
+include(${pdfium_SOURCE_DIR}/PDFiumConfig.cmake)
 
 
 add_library(${PLUGIN_NAME} SHARED
 add_library(${PLUGIN_NAME} SHARED
             "printing.cpp"
             "printing.cpp"
@@ -35,7 +46,10 @@ set_target_properties(${PLUGIN_NAME} PROPERTIES CXX_VISIBILITY_PRESET hidden)
 target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
 target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
 target_include_directories(${PLUGIN_NAME}
 target_include_directories(${PLUGIN_NAME}
                            INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
                            INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/include")
-target_link_libraries(${PLUGIN_NAME} PRIVATE pdfium flutter flutter_wrapper_plugin)
+target_link_libraries(${PLUGIN_NAME}
+                      PRIVATE pdfium flutter flutter_wrapper_plugin)
 
 
 # List of absolute paths to libraries that should be bundled with the plugin
 # List of absolute paths to libraries that should be bundled with the plugin
-set(printing_bundled_libraries "${CMAKE_CURRENT_SOURCE_DIR}/pdfium/x64/bin/pdfium.dll" PARENT_SCOPE)
+set(printing_bundled_libraries
+    "${PDFium_LIBRARY}"
+    PARENT_SCOPE)

+# Distributed under the OSI-approved MIT License.  See accompanying
+# file LICENSE or https://github.com/Crascit/DownloadProject for details.
+
+cmake_minimum_required(VERSION 2.8.2)
+
+project(${DL_ARGS_PROJ}-download NONE)
+
+include(ExternalProject)
+ExternalProject_Add(${DL_ARGS_PROJ}-download
+                    ${DL_ARGS_UNPARSED_ARGUMENTS}
+                    SOURCE_DIR          "${DL_ARGS_SOURCE_DIR}"
+                    BINARY_DIR          "${DL_ARGS_BINARY_DIR}"
+                    CONFIGURE_COMMAND   ""
+                    BUILD_COMMAND       ""
+                    INSTALL_COMMAND     ""
+                    TEST_COMMAND        ""
+)

+# Distributed under the OSI-approved MIT License.  See accompanying
+# file LICENSE or https://github.com/Crascit/DownloadProject for details.
+#
+# MODULE:   DownloadProject
+#
+# PROVIDES:
+#   download_project( PROJ projectName
+#                    [PREFIX prefixDir]
+#                    [DOWNLOAD_DIR downloadDir]
+#                    [SOURCE_DIR srcDir]
+#                    [BINARY_DIR binDir]
+#                    [QUIET]
+#                    ...
+#   )
+#
+#       Provides the ability to download and unpack a tarball, zip file, git repository,
+#       etc. at configure time (i.e. when the cmake command is run). How the downloaded
+#       and unpacked contents are used is up to the caller, but the motivating case is
+#       to download source code which can then be included directly in the build with
+#       add_subdirectory() after the call to download_project(). Source and build
+#       directories are set up with this in mind.
+#
+#       The PROJ argument is required. The projectName value will be used to construct
+#       the following variables upon exit (obviously replace projectName with its actual
+#       value):
+#
+#           projectName_SOURCE_DIR
+#           projectName_BINARY_DIR
+#
+#       The SOURCE_DIR and BINARY_DIR arguments are optional and would not typically
+#       need to be provided. They can be specified if you want the downloaded source
+#       and build directories to be located in a specific place. The contents of
+#       projectName_SOURCE_DIR and projectName_BINARY_DIR will be populated with the
+#       locations used whether you provide SOURCE_DIR/BINARY_DIR or not.
+#
+#       The DOWNLOAD_DIR argument does not normally need to be set. It controls the
+#       location of the temporary CMake build used to perform the download.
+#
+#       The PREFIX argument can be provided to change the base location of the default
+#       values of DOWNLOAD_DIR, SOURCE_DIR and BINARY_DIR. If all of those three arguments
+#       are provided, then PREFIX will have no effect. The default value for PREFIX is
+#       CMAKE_BINARY_DIR.
+#
+#       The QUIET option can be given if you do not want to show the output associated
+#       with downloading the specified project.
+#
+#       In addition to the above, any other options are passed through unmodified to
+#       ExternalProject_Add() to perform the actual download, patch and update steps.
+#       The following ExternalProject_Add() options are explicitly prohibited (they
+#       are reserved for use by the download_project() command):
+#
+#           CONFIGURE_COMMAND
+#           BUILD_COMMAND
+#           INSTALL_COMMAND
+#           TEST_COMMAND
+#
+#       Only those ExternalProject_Add() arguments which relate to downloading, patching
+#       and updating of the project sources are intended to be used. Also note that at
+#       least one set of download-related arguments are required.
+#
+#       If using CMake 3.2 or later, the UPDATE_DISCONNECTED option can be used to
+#       prevent a check at the remote end for changes every time CMake is run
+#       after the first successful download. See the documentation of the ExternalProject
+#       module for more information. It is likely you will want to use this option if it
+#       is available to you. Note, however, that the ExternalProject implementation contains
+#       bugs which result in incorrect handling of the UPDATE_DISCONNECTED option when
+#       using the URL download method or when specifying a SOURCE_DIR with no download
+#       method. Fixes for these have been created, the last of which is scheduled for
+#       inclusion in CMake 3.8.0. Details can be found here:
+#
+#           https://gitlab.kitware.com/cmake/cmake/commit/bdca68388bd57f8302d3c1d83d691034b7ffa70c
+#           https://gitlab.kitware.com/cmake/cmake/issues/16428
+#
+#       If you experience build errors related to the update step, consider avoiding
+#       the use of UPDATE_DISCONNECTED.
+#
+# EXAMPLE USAGE:
+#
+#   include(DownloadProject)
+#   download_project(PROJ                googletest
+#                    GIT_REPOSITORY      https://github.com/google/googletest.git
+#                    GIT_TAG             master
+#                    UPDATE_DISCONNECTED 1
+#                    QUIET
+#   )
+#
+#   add_subdirectory(${googletest_SOURCE_DIR} ${googletest_BINARY_DIR})
+#
+#========================================================================================
+
+
+set(_DownloadProjectDir "${CMAKE_CURRENT_LIST_DIR}")
+
+include(CMakeParseArguments)
+
+function(download_project)
+
+    set(options QUIET)
+    set(oneValueArgs
+        PROJ
+        PREFIX
+        DOWNLOAD_DIR
+        SOURCE_DIR
+        BINARY_DIR
+        # Prevent the following from being passed through
+        CONFIGURE_COMMAND
+        BUILD_COMMAND
+        INSTALL_COMMAND
+        TEST_COMMAND
+    )
+    set(multiValueArgs "")
+
+    cmake_parse_arguments(DL_ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+
+    # Hide output if requested
+    if (DL_ARGS_QUIET)
+        set(OUTPUT_QUIET "OUTPUT_QUIET")
+    else()
+        unset(OUTPUT_QUIET)
+        message(STATUS "Downloading/updating ${DL_ARGS_PROJ}")
+    endif()
+
+    # Set up where we will put our temporary CMakeLists.txt file and also
+    # the base point below which the default source and binary dirs will be.
+    # The prefix must always be an absolute path.
+    if (NOT DL_ARGS_PREFIX)
+        set(DL_ARGS_PREFIX "${CMAKE_BINARY_DIR}")
+    else()
+        get_filename_component(DL_ARGS_PREFIX "${DL_ARGS_PREFIX}" ABSOLUTE
+                               BASE_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+    endif()
+    if (NOT DL_ARGS_DOWNLOAD_DIR)
+        set(DL_ARGS_DOWNLOAD_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-download")
+    endif()
+
+    # Ensure the caller can know where to find the source and build directories
+    if (NOT DL_ARGS_SOURCE_DIR)
+        set(DL_ARGS_SOURCE_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-src")
+    endif()
+    if (NOT DL_ARGS_BINARY_DIR)
+        set(DL_ARGS_BINARY_DIR "${DL_ARGS_PREFIX}/${DL_ARGS_PROJ}-build")
+    endif()
+    set(${DL_ARGS_PROJ}_SOURCE_DIR "${DL_ARGS_SOURCE_DIR}" PARENT_SCOPE)
+    set(${DL_ARGS_PROJ}_BINARY_DIR "${DL_ARGS_BINARY_DIR}" PARENT_SCOPE)
+
+    # The way that CLion manages multiple configurations, it causes a copy of
+    # the CMakeCache.txt to be copied across due to it not expecting there to
+    # be a project within a project.  This causes the hard-coded paths in the
+    # cache to be copied and builds to fail.  To mitigate this, we simply
+    # remove the cache if it exists before we configure the new project.  It
+    # is safe to do so because it will be re-generated.  Since this is only
+    # executed at the configure step, it should not cause additional builds or
+    # downloads.
+    file(REMOVE "${DL_ARGS_DOWNLOAD_DIR}/CMakeCache.txt")
+
+    # Create and build a separate CMake project to carry out the download.
+    # If we've already previously done these steps, they will not cause
+    # anything to be updated, so extra rebuilds of the project won't occur.
+    # Make sure to pass through CMAKE_MAKE_PROGRAM in case the main project
+    # has this set to something not findable on the PATH.
+    configure_file("${_DownloadProjectDir}/DownloadProject.CMakeLists.cmake.in"
+                   "${DL_ARGS_DOWNLOAD_DIR}/CMakeLists.txt")
+    execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
+                        -D "CMAKE_MAKE_PROGRAM:FILE=${CMAKE_MAKE_PROGRAM}"
+                        .
+                    RESULT_VARIABLE result
+                    ${OUTPUT_QUIET}
+                    WORKING_DIRECTORY "${DL_ARGS_DOWNLOAD_DIR}"
+    )
+    if(result)
+        message(FATAL_ERROR "CMake step for ${DL_ARGS_PROJ} failed: ${result}")
+    endif()
+    execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                    RESULT_VARIABLE result
+                    ${OUTPUT_QUIET}
+                    WORKING_DIRECTORY "${DL_ARGS_DOWNLOAD_DIR}"
+    )
+    if(result)
+        message(FATAL_ERROR "Build step for ${DL_ARGS_PROJ} failed: ${result}")
+    endif()
+
+endfunction()

-// Copyright 2014 PDFium Authors. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
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-//    * Redistributions in binary form must reproduce the above
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-//    * Neither the name of Google Inc. nor the names of its
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-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
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-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.

-# PDFium Package Configuration for CMake
-#
-# To use PDFium in you CMake project:
-#
-#   1. set the environment variable PDFium_DIR to the folder containing this file.
-#   2. in your CMakeLists.txt, add
-#       find_package(PDFium)
-#   3. then link you excecutable with PDFium
-#       target_link_libraries(my_exe pdfium)
-
-include(FindPackageHandleStandardArgs)
-
-find_path(PDFium_INCLUDE_DIR
-    NAMES "fpdfview.h"
-    PATHS "${CMAKE_CURRENT_LIST_DIR}"
-    PATH_SUFFIXES "include"
-)
-
-if(MSVC)
-  if(CMAKE_CL_64)
-    set(PDFium_ARCH x64)
-  else()
-    set(PDFium_ARCH x86)
-  endif()
-
-  find_file(PDFium_LIBRARY
-        NAMES "pdfium.dll"
-        PATHS "${CMAKE_CURRENT_LIST_DIR}"
-        PATH_SUFFIXES "${PDFium_ARCH}/bin")
-
-  find_file(PDFium_IMPLIB
-        NAMES "pdfium.dll.lib"
-        PATHS "${CMAKE_CURRENT_LIST_DIR}"
-        PATH_SUFFIXES "${PDFium_ARCH}/lib")
-
-  add_library(pdfium SHARED IMPORTED)
-  set_target_properties(pdfium
-    PROPERTIES
-    IMPORTED_LOCATION             "${PDFium_LIBRARY}"
-    IMPORTED_IMPLIB               "${PDFium_IMPLIB}"
-    INTERFACE_INCLUDE_DIRECTORIES "${PDFium_INCLUDE_DIR};${PDFium_INCLUDE_DIR}/cpp"
-  )
-
-  find_package_handle_standard_args(PDFium
-    REQUIRED_VARS PDFium_LIBRARY PDFium_IMPLIB PDFium_INCLUDE_DIR
-  )
-else()
-  find_library(PDFium_LIBRARY
-        NAMES "pdfium"
-        PATHS "${CMAKE_CURRENT_LIST_DIR}"
-        PATH_SUFFIXES "lib")
-
-  add_library(pdfium SHARED IMPORTED)
-  set_target_properties(pdfium
-    PROPERTIES
-    IMPORTED_LOCATION             "${PDFium_LIBRARY}"
-    INTERFACE_INCLUDE_DIRECTORIES "${PDFium_INCLUDE_DIR};${PDFium_INCLUDE_DIR}/cpp"
-  )
-
-  find_package_handle_standard_args(PDFium
-    REQUIRED_VARS PDFium_LIBRARY PDFium_INCLUDE_DIR
-  )
-endif()

-// Copyright 2017 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.
-
-#ifndef PUBLIC_CPP_FPDF_DELETERS_H_
-#define PUBLIC_CPP_FPDF_DELETERS_H_
-
-#include "../fpdf_annot.h"
-#include "../fpdf_dataavail.h"
-#include "../fpdf_edit.h"
-#include "../fpdf_formfill.h"
-#include "../fpdf_javascript.h"
-#include "../fpdf_structtree.h"
-#include "../fpdf_text.h"
-#include "../fpdf_transformpage.h"
-#include "../fpdfview.h"
-
-// Custom deleters for using FPDF_* types with std::unique_ptr<>.
-
-struct FPDFAnnotationDeleter {
-  inline void operator()(FPDF_ANNOTATION annot) { FPDFPage_CloseAnnot(annot); }
-};
-
-struct FPDFAvailDeleter {
-  inline void operator()(FPDF_AVAIL avail) { FPDFAvail_Destroy(avail); }
-};
-
-struct FPDFBitmapDeleter {
-  inline void operator()(FPDF_BITMAP bitmap) { FPDFBitmap_Destroy(bitmap); }
-};
-
-struct FPDFClipPathDeleter {
-  inline void operator()(FPDF_CLIPPATH clip_path) {
-    FPDF_DestroyClipPath(clip_path);
-  }
-};
-
-struct FPDFDocumentDeleter {
-  inline void operator()(FPDF_DOCUMENT doc) { FPDF_CloseDocument(doc); }
-};
-
-struct FPDFFontDeleter {
-  inline void operator()(FPDF_FONT font) { FPDFFont_Close(font); }
-};
-
-struct FPDFFormHandleDeleter {
-  inline void operator()(FPDF_FORMHANDLE form) {
-    FPDFDOC_ExitFormFillEnvironment(form);
-  }
-};
-
-struct FPDFJavaScriptActionDeleter {
-  inline void operator()(FPDF_JAVASCRIPT_ACTION javascript) {
-    FPDFDoc_CloseJavaScriptAction(javascript);
-  }
-};
-
-struct FPDFPageDeleter {
-  inline void operator()(FPDF_PAGE page) { FPDF_ClosePage(page); }
-};
-
-struct FPDFPageLinkDeleter {
-  inline void operator()(FPDF_PAGELINK pagelink) {
-    FPDFLink_CloseWebLinks(pagelink);
-  }
-};
-
-struct FPDFPageObjectDeleter {
-  inline void operator()(FPDF_PAGEOBJECT object) {
-    FPDFPageObj_Destroy(object);
-  }
-};
-
-struct FPDFStructTreeDeleter {
-  inline void operator()(FPDF_STRUCTTREE tree) { FPDF_StructTree_Close(tree); }
-};
-
-struct FPDFTextFindDeleter {
-  inline void operator()(FPDF_SCHHANDLE handle) { FPDFText_FindClose(handle); }
-};
-
-struct FPDFTextPageDeleter {
-  inline void operator()(FPDF_TEXTPAGE text) { FPDFText_ClosePage(text); }
-};
-
-#endif  // PUBLIC_CPP_FPDF_DELETERS_H_

-// Copyright 2018 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.
-
-#ifndef PUBLIC_CPP_FPDF_SCOPERS_H_
-#define PUBLIC_CPP_FPDF_SCOPERS_H_
-
-#include <memory>
-#include <type_traits>
-
-#include "fpdf_deleters.h"
-
-// Versions of FPDF types that clean up the object at scope exit.
-
-using ScopedFPDFAnnotation =
-    std::unique_ptr<std::remove_pointer<FPDF_ANNOTATION>::type,
-                    FPDFAnnotationDeleter>;
-
-using ScopedFPDFAvail =
-    std::unique_ptr<std::remove_pointer<FPDF_AVAIL>::type, FPDFAvailDeleter>;
-
-using ScopedFPDFBitmap =
-    std::unique_ptr<std::remove_pointer<FPDF_BITMAP>::type, FPDFBitmapDeleter>;
-
-using ScopedFPDFClipPath =
-    std::unique_ptr<std::remove_pointer<FPDF_CLIPPATH>::type,
-                    FPDFClipPathDeleter>;
-
-using ScopedFPDFDocument =
-    std::unique_ptr<std::remove_pointer<FPDF_DOCUMENT>::type,
-                    FPDFDocumentDeleter>;
-
-using ScopedFPDFFont =
-    std::unique_ptr<std::remove_pointer<FPDF_FONT>::type, FPDFFontDeleter>;
-
-using ScopedFPDFFormHandle =
-    std::unique_ptr<std::remove_pointer<FPDF_FORMHANDLE>::type,
-                    FPDFFormHandleDeleter>;
-
-using ScopedFPDFJavaScriptAction =
-    std::unique_ptr<std::remove_pointer<FPDF_JAVASCRIPT_ACTION>::type,
-                    FPDFJavaScriptActionDeleter>;
-
-using ScopedFPDFPage =
-    std::unique_ptr<std::remove_pointer<FPDF_PAGE>::type, FPDFPageDeleter>;
-
-using ScopedFPDFPageLink =
-    std::unique_ptr<std::remove_pointer<FPDF_PAGELINK>::type,
-                    FPDFPageLinkDeleter>;
-
-using ScopedFPDFPageObject =
-    std::unique_ptr<std::remove_pointer<FPDF_PAGEOBJECT>::type,
-                    FPDFPageObjectDeleter>;
-
-using ScopedFPDFStructTree =
-    std::unique_ptr<std::remove_pointer<FPDF_STRUCTTREE>::type,
-                    FPDFStructTreeDeleter>;
-
-using ScopedFPDFTextFind =
-    std::unique_ptr<std::remove_pointer<FPDF_SCHHANDLE>::type,
-                    FPDFTextFindDeleter>;
-
-using ScopedFPDFTextPage =
-    std::unique_ptr<std::remove_pointer<FPDF_TEXTPAGE>::type,
-                    FPDFTextPageDeleter>;
-
-#endif  // PUBLIC_CPP_FPDF_SCOPERS_H_

-// Copyright 2017 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.
-
-#ifndef PUBLIC_FPDF_ANNOT_H_
-#define PUBLIC_FPDF_ANNOT_H_
-
-#include <stddef.h>
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdf_doc.h"
-// NOLINTNEXTLINE(build/include)
-#include "fpdf_formfill.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-#define FPDF_ANNOT_UNKNOWN 0
-#define FPDF_ANNOT_TEXT 1
-#define FPDF_ANNOT_LINK 2
-#define FPDF_ANNOT_FREETEXT 3
-#define FPDF_ANNOT_LINE 4
-#define FPDF_ANNOT_SQUARE 5
-#define FPDF_ANNOT_CIRCLE 6
-#define FPDF_ANNOT_POLYGON 7
-#define FPDF_ANNOT_POLYLINE 8
-#define FPDF_ANNOT_HIGHLIGHT 9
-#define FPDF_ANNOT_UNDERLINE 10
-#define FPDF_ANNOT_SQUIGGLY 11
-#define FPDF_ANNOT_STRIKEOUT 12
-#define FPDF_ANNOT_STAMP 13
-#define FPDF_ANNOT_CARET 14
-#define FPDF_ANNOT_INK 15
-#define FPDF_ANNOT_POPUP 16
-#define FPDF_ANNOT_FILEATTACHMENT 17
-#define FPDF_ANNOT_SOUND 18
-#define FPDF_ANNOT_MOVIE 19
-#define FPDF_ANNOT_WIDGET 20
-#define FPDF_ANNOT_SCREEN 21
-#define FPDF_ANNOT_PRINTERMARK 22
-#define FPDF_ANNOT_TRAPNET 23
-#define FPDF_ANNOT_WATERMARK 24
-#define FPDF_ANNOT_THREED 25
-#define FPDF_ANNOT_RICHMEDIA 26
-#define FPDF_ANNOT_XFAWIDGET 27
-
-// Refer to PDF Reference (6th edition) table 8.16 for all annotation flags.
-#define FPDF_ANNOT_FLAG_NONE 0
-#define FPDF_ANNOT_FLAG_INVISIBLE (1 << 0)
-#define FPDF_ANNOT_FLAG_HIDDEN (1 << 1)
-#define FPDF_ANNOT_FLAG_PRINT (1 << 2)
-#define FPDF_ANNOT_FLAG_NOZOOM (1 << 3)
-#define FPDF_ANNOT_FLAG_NOROTATE (1 << 4)
-#define FPDF_ANNOT_FLAG_NOVIEW (1 << 5)
-#define FPDF_ANNOT_FLAG_READONLY (1 << 6)
-#define FPDF_ANNOT_FLAG_LOCKED (1 << 7)
-#define FPDF_ANNOT_FLAG_TOGGLENOVIEW (1 << 8)
-
-#define FPDF_ANNOT_APPEARANCEMODE_NORMAL 0
-#define FPDF_ANNOT_APPEARANCEMODE_ROLLOVER 1
-#define FPDF_ANNOT_APPEARANCEMODE_DOWN 2
-#define FPDF_ANNOT_APPEARANCEMODE_COUNT 3
-
-// Refer to PDF Reference version 1.7 table 8.70 for field flags common to all
-// interactive form field types.
-#define FPDF_FORMFLAG_NONE 0
-#define FPDF_FORMFLAG_READONLY (1 << 0)
-#define FPDF_FORMFLAG_REQUIRED (1 << 1)
-#define FPDF_FORMFLAG_NOEXPORT (1 << 2)
-
-// Refer to PDF Reference version 1.7 table 8.77 for field flags specific to
-// interactive form text fields.
-#define FPDF_FORMFLAG_TEXT_MULTILINE (1 << 12)
-#define FPDF_FORMFLAG_TEXT_PASSWORD (1 << 13)
-
-// Refer to PDF Reference version 1.7 table 8.79 for field flags specific to
-// interactive form choice fields.
-#define FPDF_FORMFLAG_CHOICE_COMBO (1 << 17)
-#define FPDF_FORMFLAG_CHOICE_EDIT (1 << 18)
-#define FPDF_FORMFLAG_CHOICE_MULTI_SELECT (1 << 21)
-
-typedef enum FPDFANNOT_COLORTYPE {
-  FPDFANNOT_COLORTYPE_Color = 0,
-  FPDFANNOT_COLORTYPE_InteriorColor
-} FPDFANNOT_COLORTYPE;
-
-// Experimental API.
-// Check if an annotation subtype is currently supported for creation.
-// Currently supported subtypes: circle, highlight, ink, popup, square,
-// squiggly, stamp, strikeout, text, and underline.
-//
-//   subtype   - the subtype to be checked.
-//
-// Returns true if this subtype supported.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_IsSupportedSubtype(FPDF_ANNOTATION_SUBTYPE subtype);
-
-// Experimental API.
-// Create an annotation in |page| of the subtype |subtype|. If the specified
-// subtype is illegal or unsupported, then a new annotation will not be created.
-// Must call FPDFPage_CloseAnnot() when the annotation returned by this
-// function is no longer needed.
-//
-//   page      - handle to a page.
-//   subtype   - the subtype of the new annotation.
-//
-// Returns a handle to the new annotation object, or NULL on failure.
-FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV
-FPDFPage_CreateAnnot(FPDF_PAGE page, FPDF_ANNOTATION_SUBTYPE subtype);
-
-// Experimental API.
-// Get the number of annotations in |page|.
-//
-//   page   - handle to a page.
-//
-// Returns the number of annotations in |page|.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPage_GetAnnotCount(FPDF_PAGE page);
-
-// Experimental API.
-// Get annotation in |page| at |index|. Must call FPDFPage_CloseAnnot() when the
-// annotation returned by this function is no longer needed.
-//
-//   page  - handle to a page.
-//   index - the index of the annotation.
-//
-// Returns a handle to the annotation object, or NULL on failure.
-FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV FPDFPage_GetAnnot(FPDF_PAGE page,
-                                                            int index);
-
-// Experimental API.
-// Get the index of |annot| in |page|. This is the opposite of
-// FPDFPage_GetAnnot().
-//
-//   page  - handle to the page that the annotation is on.
-//   annot - handle to an annotation.
-//
-// Returns the index of |annot|, or -1 on failure.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPage_GetAnnotIndex(FPDF_PAGE page,
-                                                     FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Close an annotation. Must be called when the annotation returned by
-// FPDFPage_CreateAnnot() or FPDFPage_GetAnnot() is no longer needed. This
-// function does not remove the annotation from the document.
-//
-//   annot  - handle to an annotation.
-FPDF_EXPORT void FPDF_CALLCONV FPDFPage_CloseAnnot(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Remove the annotation in |page| at |index|.
-//
-//   page  - handle to a page.
-//   index - the index of the annotation.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPage_RemoveAnnot(FPDF_PAGE page,
-                                                         int index);
-
-// Experimental API.
-// Get the subtype of an annotation.
-//
-//   annot  - handle to an annotation.
-//
-// Returns the annotation subtype.
-FPDF_EXPORT FPDF_ANNOTATION_SUBTYPE FPDF_CALLCONV
-FPDFAnnot_GetSubtype(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Check if an annotation subtype is currently supported for object extraction,
-// update, and removal.
-// Currently supported subtypes: ink and stamp.
-//
-//   subtype   - the subtype to be checked.
-//
-// Returns true if this subtype supported.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_IsObjectSupportedSubtype(FPDF_ANNOTATION_SUBTYPE subtype);
-
-// Experimental API.
-// Update |obj| in |annot|. |obj| must be in |annot| already and must have
-// been retrieved by FPDFAnnot_GetObject(). Currently, only ink and stamp
-// annotations are supported by this API. Also note that only path, image, and
-// text objects have APIs for modification; see FPDFPath_*(), FPDFText_*(), and
-// FPDFImageObj_*().
-//
-//   annot  - handle to an annotation.
-//   obj    - handle to the object that |annot| needs to update.
-//
-// Return true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_UpdateObject(FPDF_ANNOTATION annot, FPDF_PAGEOBJECT obj);
-
-// Experimental API.
-// Add a new InkStroke, represented by an array of points, to the InkList of
-// |annot|. The API creates an InkList if one doesn't already exist in |annot|.
-// This API works only for ink annotations. Please refer section 12.5.6.13 in
-// PDF 32000-1:2008 Specification.
-//
-//   annot       - handle to an annotation.
-//   points      - pointer to a FS_POINTF array representing input points.
-//   point_count - number of elements in |points| array. This should not exceed
-//                 the maximum value that can be represented by an int32_t).
-//
-// Returns the 0-based index at which the new InkStroke is added in the InkList
-// of the |annot|. Returns -1 on failure.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAnnot_AddInkStroke(FPDF_ANNOTATION annot,
-                                                     const FS_POINTF* points,
-                                                     size_t point_count);
-
-// Experimental API.
-// Removes an InkList in |annot|.
-// This API works only for ink annotations.
-//
-//   annot  - handle to an annotation.
-//
-// Return true on successful removal of /InkList entry from context of the
-// non-null ink |annot|. Returns false on failure.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_RemoveInkList(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Add |obj| to |annot|. |obj| must have been created by
-// FPDFPageObj_CreateNew{Path|Rect}() or FPDFPageObj_New{Text|Image}Obj(), and
-// will be owned by |annot|. Note that an |obj| cannot belong to more than one
-// |annot|. Currently, only ink and stamp annotations are supported by this API.
-// Also note that only path, image, and text objects have APIs for creation.
-//
-//   annot  - handle to an annotation.
-//   obj    - handle to the object that is to be added to |annot|.
-//
-// Return true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_AppendObject(FPDF_ANNOTATION annot, FPDF_PAGEOBJECT obj);
-
-// Experimental API.
-// Get the total number of objects in |annot|, including path objects, text
-// objects, external objects, image objects, and shading objects.
-//
-//   annot  - handle to an annotation.
-//
-// Returns the number of objects in |annot|.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAnnot_GetObjectCount(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Get the object in |annot| at |index|.
-//
-//   annot  - handle to an annotation.
-//   index  - the index of the object.
-//
-// Return a handle to the object, or NULL on failure.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
-FPDFAnnot_GetObject(FPDF_ANNOTATION annot, int index);
-
-// Experimental API.
-// Remove the object in |annot| at |index|.
-//
-//   annot  - handle to an annotation.
-//   index  - the index of the object to be removed.
-//
-// Return true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_RemoveObject(FPDF_ANNOTATION annot, int index);
-
-// Experimental API.
-// Set the color of an annotation. Fails when called on annotations with
-// appearance streams already defined; instead use
-// FPDFPath_Set{Stroke|Fill}Color().
-//
-//   annot    - handle to an annotation.
-//   type     - type of the color to be set.
-//   R, G, B  - buffer to hold the RGB value of the color. Ranges from 0 to 255.
-//   A        - buffer to hold the opacity. Ranges from 0 to 255.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_SetColor(FPDF_ANNOTATION annot,
-                                                       FPDFANNOT_COLORTYPE type,
-                                                       unsigned int R,
-                                                       unsigned int G,
-                                                       unsigned int B,
-                                                       unsigned int A);
-
-// Experimental API.
-// Get the color of an annotation. If no color is specified, default to yellow
-// for highlight annotation, black for all else. Fails when called on
-// annotations with appearance streams already defined; instead use
-// FPDFPath_Get{Stroke|Fill}Color().
-//
-//   annot    - handle to an annotation.
-//   type     - type of the color requested.
-//   R, G, B  - buffer to hold the RGB value of the color. Ranges from 0 to 255.
-//   A        - buffer to hold the opacity. Ranges from 0 to 255.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_GetColor(FPDF_ANNOTATION annot,
-                                                       FPDFANNOT_COLORTYPE type,
-                                                       unsigned int* R,
-                                                       unsigned int* G,
-                                                       unsigned int* B,
-                                                       unsigned int* A);
-
-// Experimental API.
-// Check if the annotation is of a type that has attachment points
-// (i.e. quadpoints). Quadpoints are the vertices of the rectangle that
-// encompasses the texts affected by the annotation. They provide the
-// coordinates in the page where the annotation is attached. Only text markup
-// annotations (i.e. highlight, strikeout, squiggly, and underline) and link
-// annotations have quadpoints.
-//
-//   annot  - handle to an annotation.
-//
-// Returns true if the annotation is of a type that has quadpoints, false
-// otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_HasAttachmentPoints(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Replace the attachment points (i.e. quadpoints) set of an annotation at
-// |quad_index|. This index needs to be within the result of
-// FPDFAnnot_CountAttachmentPoints().
-// If the annotation's appearance stream is defined and this annotation is of a
-// type with quadpoints, then update the bounding box too if the new quadpoints
-// define a bigger one.
-//
-//   annot       - handle to an annotation.
-//   quad_index  - index of the set of quadpoints.
-//   quad_points - the quadpoints to be set.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_SetAttachmentPoints(FPDF_ANNOTATION annot,
-                              size_t quad_index,
-                              const FS_QUADPOINTSF* quad_points);
-
-// Experimental API.
-// Append to the list of attachment points (i.e. quadpoints) of an annotation.
-// If the annotation's appearance stream is defined and this annotation is of a
-// type with quadpoints, then update the bounding box too if the new quadpoints
-// define a bigger one.
-//
-//   annot       - handle to an annotation.
-//   quad_points - the quadpoints to be set.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_AppendAttachmentPoints(FPDF_ANNOTATION annot,
-                                 const FS_QUADPOINTSF* quad_points);
-
-// Experimental API.
-// Get the number of sets of quadpoints of an annotation.
-//
-//   annot  - handle to an annotation.
-//
-// Returns the number of sets of quadpoints, or 0 on failure.
-FPDF_EXPORT size_t FPDF_CALLCONV
-FPDFAnnot_CountAttachmentPoints(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Get the attachment points (i.e. quadpoints) of an annotation.
-//
-//   annot       - handle to an annotation.
-//   quad_index  - index of the set of quadpoints.
-//   quad_points - receives the quadpoints; must not be NULL.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_GetAttachmentPoints(FPDF_ANNOTATION annot,
-                              size_t quad_index,
-                              FS_QUADPOINTSF* quad_points);
-
-// Experimental API.
-// Set the annotation rectangle defining the location of the annotation. If the
-// annotation's appearance stream is defined and this annotation is of a type
-// without quadpoints, then update the bounding box too if the new rectangle
-// defines a bigger one.
-//
-//   annot  - handle to an annotation.
-//   rect   - the annotation rectangle to be set.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_SetRect(FPDF_ANNOTATION annot,
-                                                      const FS_RECTF* rect);
-
-// Experimental API.
-// Get the annotation rectangle defining the location of the annotation.
-//
-//   annot  - handle to an annotation.
-//   rect   - receives the rectangle; must not be NULL.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_GetRect(FPDF_ANNOTATION annot,
-                                                      FS_RECTF* rect);
-
-// Experimental API.
-// Check if |annot|'s dictionary has |key| as a key.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to look for, encoded in UTF-8.
-//
-// Returns true if |key| exists.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_HasKey(FPDF_ANNOTATION annot,
-                                                     FPDF_BYTESTRING key);
-
-// Experimental API.
-// Get the type of the value corresponding to |key| in |annot|'s dictionary.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to look for, encoded in UTF-8.
-//
-// Returns the type of the dictionary value.
-FPDF_EXPORT FPDF_OBJECT_TYPE FPDF_CALLCONV
-FPDFAnnot_GetValueType(FPDF_ANNOTATION annot, FPDF_BYTESTRING key);
-
-// Experimental API.
-// Set the string value corresponding to |key| in |annot|'s dictionary,
-// overwriting the existing value if any. The value type would be
-// FPDF_OBJECT_STRING after this function call succeeds.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to the dictionary entry to be set, encoded in UTF-8.
-//   value  - the string value to be set, encoded in UTF-16LE.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_SetStringValue(FPDF_ANNOTATION annot,
-                         FPDF_BYTESTRING key,
-                         FPDF_WIDESTRING value);
-
-// Experimental API.
-// Get the string value corresponding to |key| in |annot|'s dictionary. |buffer|
-// is only modified if |buflen| is longer than the length of contents. Note that
-// if |key| does not exist in the dictionary or if |key|'s corresponding value
-// in the dictionary is not a string (i.e. the value is not of type
-// FPDF_OBJECT_STRING or FPDF_OBJECT_NAME), then an empty string would be copied
-// to |buffer| and the return value would be 2. On other errors, nothing would
-// be added to |buffer| and the return value would be 0.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to the requested dictionary entry, encoded in UTF-8.
-//   buffer - buffer for holding the value string, encoded in UTF-16LE.
-//   buflen - length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetStringValue(FPDF_ANNOTATION annot,
-                         FPDF_BYTESTRING key,
-                         FPDF_WCHAR* buffer,
-                         unsigned long buflen);
-
-// Experimental API.
-// Get the float value corresponding to |key| in |annot|'s dictionary. Writes
-// value to |value| and returns True if |key| exists in the dictionary and
-// |key|'s corresponding value is a number (FPDF_OBJECT_NUMBER), False
-// otherwise.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to the requested dictionary entry, encoded in UTF-8.
-//   value  - receives the value, must not be NULL.
-//
-// Returns True if value found, False otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_GetNumberValue(FPDF_ANNOTATION annot,
-                         FPDF_BYTESTRING key,
-                         float* value);
-
-// Experimental API.
-// Set the AP (appearance string) in |annot|'s dictionary for a given
-// |appearanceMode|.
-//
-//   annot          - handle to an annotation.
-//   appearanceMode - the appearance mode (normal, rollover or down) for which
-//                    to get the AP.
-//   value          - the string value to be set, encoded in UTF-16LE. If
-//                    nullptr is passed, the AP is cleared for that mode. If the
-//                    mode is Normal, APs for all modes are cleared.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_SetAP(FPDF_ANNOTATION annot,
-                FPDF_ANNOT_APPEARANCEMODE appearanceMode,
-                FPDF_WIDESTRING value);
-
-// Experimental API.
-// Get the AP (appearance string) from |annot|'s dictionary for a given
-// |appearanceMode|.
-// |buffer| is only modified if |buflen| is large enough to hold the whole AP
-// string. If |buflen| is smaller, the total size of the AP is still returned,
-// but nothing is copied.
-// If there is no appearance stream for |annot| in |appearanceMode|, an empty
-// string is written to |buf| and 2 is returned.
-// On other errors, nothing is written to |buffer| and 0 is returned.
-//
-//   annot          - handle to an annotation.
-//   appearanceMode - the appearance mode (normal, rollover or down) for which
-//                    to get the AP.
-//   buffer         - buffer for holding the value string, encoded in UTF-16LE.
-//   buflen         - length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetAP(FPDF_ANNOTATION annot,
-                FPDF_ANNOT_APPEARANCEMODE appearanceMode,
-                FPDF_WCHAR* buffer,
-                unsigned long buflen);
-
-// Experimental API.
-// Get the annotation corresponding to |key| in |annot|'s dictionary. Common
-// keys for linking annotations include "IRT" and "Popup". Must call
-// FPDFPage_CloseAnnot() when the annotation returned by this function is no
-// longer needed.
-//
-//   annot  - handle to an annotation.
-//   key    - the key to the requested dictionary entry, encoded in UTF-8.
-//
-// Returns a handle to the linked annotation object, or NULL on failure.
-FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV
-FPDFAnnot_GetLinkedAnnot(FPDF_ANNOTATION annot, FPDF_BYTESTRING key);
-
-// Experimental API.
-// Get the annotation flags of |annot|.
-//
-//   annot    - handle to an annotation.
-//
-// Returns the annotation flags.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAnnot_GetFlags(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Set the |annot|'s flags to be of the value |flags|.
-//
-//   annot      - handle to an annotation.
-//   flags      - the flag values to be set.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_SetFlags(FPDF_ANNOTATION annot,
-                                                       int flags);
-
-// Experimental API.
-// Get the annotation flags of |annot|.
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    annot       -   handle to an interactive form annotation.
-//
-// Returns the annotation flags specific to interactive forms.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFAnnot_GetFormFieldFlags(FPDF_FORMHANDLE handle, FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Retrieves an interactive form annotation whose rectangle contains a given
-// point on a page. Must call FPDFPage_CloseAnnot() when the annotation returned
-// is no longer needed.
-//
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    page        -   handle to the page, returned by FPDF_LoadPage function.
-//    point       -   position in PDF "user space".
-//
-// Returns the interactive form annotation whose rectangle contains the given
-// coordinates on the page. If there is no such annotation, return NULL.
-FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV
-FPDFAnnot_GetFormFieldAtPoint(FPDF_FORMHANDLE hHandle,
-                              FPDF_PAGE page,
-                              const FS_POINTF* point);
-
-// Experimental API.
-// Gets the name of |annot|, which is an interactive form annotation.
-// |buffer| is only modified if |buflen| is longer than the length of contents.
-// In case of error, nothing will be added to |buffer| and the return value will
-// be 0. Note that return value of empty string is 2 for "\0\0".
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    annot       -   handle to an interactive form annotation.
-//    buffer      -   buffer for holding the name string, encoded in UTF-16LE.
-//    buflen      -   length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetFormFieldName(FPDF_FORMHANDLE hHandle,
-                           FPDF_ANNOTATION annot,
-                           FPDF_WCHAR* buffer,
-                           unsigned long buflen);
-
-// Experimental API.
-// Gets the form field type of |annot|, which is an interactive form annotation.
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    annot       -   handle to an interactive form annotation.
-//
-// Returns the type of the form field (one of the FPDF_FORMFIELD_* values) on
-// success. Returns -1 on error.
-// See field types in fpdf_formfill.h.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFAnnot_GetFormFieldType(FPDF_FORMHANDLE hHandle, FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Gets the value of |annot|, which is an interactive form annotation.
-// |buffer| is only modified if |buflen| is longer than the length of contents.
-// In case of error, nothing will be added to |buffer| and the return value will
-// be 0. Note that return value of empty string is 2 for "\0\0".
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    annot       -   handle to an interactive form annotation.
-//    buffer      -   buffer for holding the value string, encoded in UTF-16LE.
-//    buflen      -   length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetFormFieldValue(FPDF_FORMHANDLE hHandle,
-                            FPDF_ANNOTATION annot,
-                            FPDF_WCHAR* buffer,
-                            unsigned long buflen);
-
-// Experimental API.
-// Get the number of options in the |annot|'s "Opt" dictionary. Intended for
-// use with listbox and combobox widget annotations.
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//
-// Returns the number of options in "Opt" dictionary on success. Return value
-// will be -1 if annotation does not have an "Opt" dictionary or other error.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAnnot_GetOptionCount(FPDF_FORMHANDLE hHandle,
-                                                       FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Get the string value for the label of the option at |index| in |annot|'s
-// "Opt" dictionary. Intended for use with listbox and combobox widget
-// annotations. |buffer| is only modified if |buflen| is longer than the length
-// of contents. If index is out of range or in case of other error, nothing
-// will be added to |buffer| and the return value will be 0. Note that
-// return value of empty string is 2 for "\0\0".
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//   index   - numeric index of the option in the "Opt" array
-//   buffer  - buffer for holding the value string, encoded in UTF-16LE.
-//   buflen  - length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-// If |annot| does not have an "Opt" array, |index| is out of range or if any
-// other error occurs, returns 0.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetOptionLabel(FPDF_FORMHANDLE hHandle,
-                         FPDF_ANNOTATION annot,
-                         int index,
-                         FPDF_WCHAR* buffer,
-                         unsigned long buflen);
-
-// Experimental API.
-// Determine whether or not the option at |index| in |annot|'s "Opt" dictionary
-// is selected. Intended for use with listbox and combobox widget annotations.
-//
-//   handle  - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//   index   - numeric index of the option in the "Opt" array.
-//
-// Returns true if the option at |index| in |annot|'s "Opt" dictionary is
-// selected, false otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_IsOptionSelected(FPDF_FORMHANDLE handle,
-                           FPDF_ANNOTATION annot,
-                           int index);
-
-// Experimental API.
-// Get the float value of the font size for an |annot| with variable text.
-// If 0, the font is to be auto-sized: its size is computed as a function of
-// the height of the annotation rectangle.
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//   value   - Required. Float which will be set to font size on success.
-//
-// Returns true if the font size was set in |value|, false on error or if
-// |value| not provided.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_GetFontSize(FPDF_FORMHANDLE hHandle,
-                      FPDF_ANNOTATION annot,
-                      float* value);
-
-// Experimental API.
-// Determine if |annot| is a form widget that is checked. Intended for use with
-// checkbox and radio button widgets.
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//
-// Returns true if |annot| is a form widget and is checked, false otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_IsChecked(FPDF_FORMHANDLE hHandle,
-                                                        FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Set the list of focusable annotation subtypes. Annotations of subtype
-// FPDF_ANNOT_WIDGET are by default focusable. New subtypes set using this API
-// will override the existing subtypes.
-//
-//   hHandle  - handle to the form fill module, returned by
-//              FPDFDOC_InitFormFillEnvironment.
-//   subtypes - list of annotation subtype which can be tabbed over.
-//   count    - total number of annotation subtype in list.
-// Returns true if list of annotation subtype is set successfully, false
-// otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_SetFocusableSubtypes(FPDF_FORMHANDLE hHandle,
-                               const FPDF_ANNOTATION_SUBTYPE* subtypes,
-                               size_t count);
-
-// Experimental API.
-// Get the count of focusable annotation subtypes as set by host
-// for a |hHandle|.
-//
-//   hHandle  - handle to the form fill module, returned by
-//              FPDFDOC_InitFormFillEnvironment.
-// Returns the count of focusable annotation subtypes or -1 on error.
-// Note : Annotations of type FPDF_ANNOT_WIDGET are by default focusable.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFAnnot_GetFocusableSubtypesCount(FPDF_FORMHANDLE hHandle);
-
-// Experimental API.
-// Get the list of focusable annotation subtype as set by host.
-//
-//   hHandle  - handle to the form fill module, returned by
-//              FPDFDOC_InitFormFillEnvironment.
-//   subtypes - receives the list of annotation subtype which can be tabbed
-//              over. Caller must have allocated |subtypes| more than or
-//              equal to the count obtained from
-//              FPDFAnnot_GetFocusableSubtypesCount() API.
-//   count    - size of |subtypes|.
-// Returns true on success and set list of annotation subtype to |subtypes|,
-// false otherwise.
-// Note : Annotations of type FPDF_ANNOT_WIDGET are by default focusable.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAnnot_GetFocusableSubtypes(FPDF_FORMHANDLE hHandle,
-                               FPDF_ANNOTATION_SUBTYPE* subtypes,
-                               size_t count);
-
-// Experimental API.
-// Gets FPDF_LINK object for |annot|. Intended to use for link annotations.
-//
-//   annot   - handle to an annotation.
-//
-// Returns FPDF_LINK from the FPDF_ANNOTATION and NULL on failure,
-// if the input annot is NULL or input annot's subtype is not link.
-FPDF_EXPORT FPDF_LINK FPDF_CALLCONV FPDFAnnot_GetLink(FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Gets the count of annotations in the |annot|'s control group.
-// A group of interactive form annotations is collectively called a form
-// control group. Here, |annot|, an interactive form annotation, should be
-// either a radio button or a checkbox.
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//
-// Returns number of controls in its control group or -1 on error.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFAnnot_GetFormControlCount(FPDF_FORMHANDLE hHandle, FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Gets the index of |annot| in |annot|'s control group.
-// A group of interactive form annotations is collectively called a form
-// control group. Here, |annot|, an interactive form annotation, should be
-// either a radio button or a checkbox.
-//
-//   hHandle - handle to the form fill module, returned by
-//             FPDFDOC_InitFormFillEnvironment.
-//   annot   - handle to an annotation.
-//
-// Returns index of a given |annot| in its control group or -1 on error.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFAnnot_GetFormControlIndex(FPDF_FORMHANDLE hHandle, FPDF_ANNOTATION annot);
-
-// Experimental API.
-// Gets the export value of |annot| which is an interactive form annotation.
-// Intended for use with radio button and checkbox widget annotations.
-// |buffer| is only modified if |buflen| is longer than the length of contents.
-// In case of error, nothing will be added to |buffer| and the return value
-// will be 0. Note that return value of empty string is 2 for "\0\0".
-//
-//    hHandle     -   handle to the form fill module, returned by
-//                    FPDFDOC_InitFormFillEnvironment().
-//    annot       -   handle to an interactive form annotation.
-//    buffer      -   buffer for holding the value string, encoded in UTF-16LE.
-//    buflen      -   length of the buffer in bytes.
-//
-// Returns the length of the string value in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAnnot_GetFormFieldExportValue(FPDF_FORMHANDLE hHandle,
-                                  FPDF_ANNOTATION annot,
-                                  FPDF_WCHAR* buffer,
-                                  unsigned long buflen);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_ANNOT_H_

-// Copyright 2017 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.
-
-#ifndef PUBLIC_FPDF_ATTACHMENT_H_
-#define PUBLIC_FPDF_ATTACHMENT_H_
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Experimental API.
-// Get the number of embedded files in |document|.
-//
-//   document - handle to a document.
-//
-// Returns the number of embedded files in |document|.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFDoc_GetAttachmentCount(FPDF_DOCUMENT document);
-
-// Experimental API.
-// Add an embedded file with |name| in |document|. If |name| is empty, or if
-// |name| is the name of a existing embedded file in |document|, or if
-// |document|'s embedded file name tree is too deep (i.e. |document| has too
-// many embedded files already), then a new attachment will not be added.
-//
-//   document - handle to a document.
-//   name     - name of the new attachment.
-//
-// Returns a handle to the new attachment object, or NULL on failure.
-FPDF_EXPORT FPDF_ATTACHMENT FPDF_CALLCONV
-FPDFDoc_AddAttachment(FPDF_DOCUMENT document, FPDF_WIDESTRING name);
-
-// Experimental API.
-// Get the embedded attachment at |index| in |document|. Note that the returned
-// attachment handle is only valid while |document| is open.
-//
-//   document - handle to a document.
-//   index    - the index of the requested embedded file.
-//
-// Returns the handle to the attachment object, or NULL on failure.
-FPDF_EXPORT FPDF_ATTACHMENT FPDF_CALLCONV
-FPDFDoc_GetAttachment(FPDF_DOCUMENT document, int index);
-
-// Experimental API.
-// Delete the embedded attachment at |index| in |document|. Note that this does
-// not remove the attachment data from the PDF file; it simply removes the
-// file's entry in the embedded files name tree so that it does not appear in
-// the attachment list. This behavior may change in the future.
-//
-//   document - handle to a document.
-//   index    - the index of the embedded file to be deleted.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFDoc_DeleteAttachment(FPDF_DOCUMENT document, int index);
-
-// Experimental API.
-// Get the name of the |attachment| file. |buffer| is only modified if |buflen|
-// is longer than the length of the file name. On errors, |buffer| is unmodified
-// and the returned length is 0.
-//
-//   attachment - handle to an attachment.
-//   buffer     - buffer for holding the file name, encoded in UTF-16LE.
-//   buflen     - length of the buffer in bytes.
-//
-// Returns the length of the file name in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAttachment_GetName(FPDF_ATTACHMENT attachment,
-                       FPDF_WCHAR* buffer,
-                       unsigned long buflen);
-
-// Experimental API.
-// Check if the params dictionary of |attachment| has |key| as a key.
-//
-//   attachment - handle to an attachment.
-//   key        - the key to look for, encoded in UTF-8.
-//
-// Returns true if |key| exists.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAttachment_HasKey(FPDF_ATTACHMENT attachment, FPDF_BYTESTRING key);
-
-// Experimental API.
-// Get the type of the value corresponding to |key| in the params dictionary of
-// the embedded |attachment|.
-//
-//   attachment - handle to an attachment.
-//   key        - the key to look for, encoded in UTF-8.
-//
-// Returns the type of the dictionary value.
-FPDF_EXPORT FPDF_OBJECT_TYPE FPDF_CALLCONV
-FPDFAttachment_GetValueType(FPDF_ATTACHMENT attachment, FPDF_BYTESTRING key);
-
-// Experimental API.
-// Set the string value corresponding to |key| in the params dictionary of the
-// embedded file |attachment|, overwriting the existing value if any. The value
-// type should be FPDF_OBJECT_STRING after this function call succeeds.
-//
-//   attachment - handle to an attachment.
-//   key        - the key to the dictionary entry, encoded in UTF-8.
-//   value      - the string value to be set, encoded in UTF-16LE.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAttachment_SetStringValue(FPDF_ATTACHMENT attachment,
-                              FPDF_BYTESTRING key,
-                              FPDF_WIDESTRING value);
-
-// Experimental API.
-// Get the string value corresponding to |key| in the params dictionary of the
-// embedded file |attachment|. |buffer| is only modified if |buflen| is longer
-// than the length of the string value. Note that if |key| does not exist in the
-// dictionary or if |key|'s corresponding value in the dictionary is not a
-// string (i.e. the value is not of type FPDF_OBJECT_STRING or
-// FPDF_OBJECT_NAME), then an empty string would be copied to |buffer| and the
-// return value would be 2. On other errors, nothing would be added to |buffer|
-// and the return value would be 0.
-//
-//   attachment - handle to an attachment.
-//   key        - the key to the requested string value, encoded in UTF-8.
-//   buffer     - buffer for holding the string value encoded in UTF-16LE.
-//   buflen     - length of the buffer in bytes.
-//
-// Returns the length of the dictionary value string in bytes.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAttachment_GetStringValue(FPDF_ATTACHMENT attachment,
-                              FPDF_BYTESTRING key,
-                              FPDF_WCHAR* buffer,
-                              unsigned long buflen);
-
-// Experimental API.
-// Set the file data of |attachment|, overwriting the existing file data if any.
-// The creation date and checksum will be updated, while all other dictionary
-// entries will be deleted. Note that only contents with |len| smaller than
-// INT_MAX is supported.
-//
-//   attachment - handle to an attachment.
-//   contents   - buffer holding the file data to write to |attachment|.
-//   len        - length of file data in bytes.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAttachment_SetFile(FPDF_ATTACHMENT attachment,
-                       FPDF_DOCUMENT document,
-                       const void* contents,
-                       unsigned long len);
-
-// Experimental API.
-// Get the file data of |attachment|.
-// When the attachment file data is readable, true is returned, and |out_buflen|
-// is updated to indicate the file data size. |buffer| is only modified if
-// |buflen| is non-null and long enough to contain the entire file data. Callers
-// must check both the return value and the input |buflen| is no less than the
-// returned |out_buflen| before using the data.
-//
-// Otherwise, when the attachment file data is unreadable or when |out_buflen|
-// is null, false is returned and |buffer| and |out_buflen| remain unmodified.
-//
-//   attachment - handle to an attachment.
-//   buffer     - buffer for holding the file data from |attachment|.
-//   buflen     - length of the buffer in bytes.
-//   out_buflen - pointer to the variable that will receive the minimum buffer
-//                size to contain the file data of |attachment|.
-//
-// Returns true on success, false otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFAttachment_GetFile(FPDF_ATTACHMENT attachment,
-                       void* buffer,
-                       unsigned long buflen,
-                       unsigned long* out_buflen);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_ATTACHMENT_H_

-// Copyright 2017 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.
-
-#ifndef PUBLIC_FPDF_CATALOG_H_
-#define PUBLIC_FPDF_CATALOG_H_
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-/**
- * Experimental API.
- *
- * Determine if |document| represents a tagged PDF.
- *
- * For the definition of tagged PDF, See (see 10.7 "Tagged PDF" in PDF
- * Reference 1.7).
- *
- *   document - handle to a document.
- *
- * Returns |true| iff |document| is a tagged PDF.
- */
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFCatalog_IsTagged(FPDF_DOCUMENT document);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_CATALOG_H_

-// 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_DATAAVAIL_H_
-#define PUBLIC_FPDF_DATAAVAIL_H_
-
-#include <stddef.h>
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-#define PDF_LINEARIZATION_UNKNOWN -1
-#define PDF_NOT_LINEARIZED 0
-#define PDF_LINEARIZED 1
-
-#define PDF_DATA_ERROR -1
-#define PDF_DATA_NOTAVAIL 0
-#define PDF_DATA_AVAIL 1
-
-#define PDF_FORM_ERROR -1
-#define PDF_FORM_NOTAVAIL 0
-#define PDF_FORM_AVAIL 1
-#define PDF_FORM_NOTEXIST 2
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Interface for checking whether sections of the file are available.
-typedef struct _FX_FILEAVAIL {
-  // Version number of the interface. Must be 1.
-  int version;
-
-  // Reports if the specified data section is currently available. A section is
-  // available if all bytes in the section are available.
-  //
-  // Interface Version: 1
-  // Implementation Required: Yes
-  //
-  //   pThis  - pointer to the interface structure.
-  //   offset - the offset of the data section in the file.
-  //   size   - the size of the data section.
-  //
-  // Returns true if the specified data section at |offset| of |size|
-  // is available.
-  FPDF_BOOL(*IsDataAvail)
-  (struct _FX_FILEAVAIL* pThis, size_t offset, size_t size);
-} FX_FILEAVAIL;
-typedef void* FPDF_AVAIL;
-
-// Create a document availability provider.
-//
-//   file_avail - pointer to file availability interface.
-//   file       - pointer to a file access interface.
-//
-// Returns a handle to the document availability provider, or NULL on error.
-//
-// FPDFAvail_Destroy() must be called when done with the availability provider.
-FPDF_EXPORT FPDF_AVAIL FPDF_CALLCONV FPDFAvail_Create(FX_FILEAVAIL* file_avail,
-                                                      FPDF_FILEACCESS* file);
-
-// Destroy the |avail| document availability provider.
-//
-//   avail - handle to document availability provider to be destroyed.
-FPDF_EXPORT void FPDF_CALLCONV FPDFAvail_Destroy(FPDF_AVAIL avail);
-
-// Download hints interface. Used to receive hints for further downloading.
-typedef struct _FX_DOWNLOADHINTS {
-  // Version number of the interface. Must be 1.
-  int version;
-
-  // Add a section to be downloaded.
-  //
-  // Interface Version: 1
-  // Implementation Required: Yes
-  //
-  //   pThis  - pointer to the interface structure.
-  //   offset - the offset of the hint reported to be downloaded.
-  //   size   - the size of the hint reported to be downloaded.
-  //
-  // The |offset| and |size| of the section may not be unique. Part of the
-  // section might be already available. The download manager must deal with
-  // overlapping sections.
-  void (*AddSegment)(struct _FX_DOWNLOADHINTS* pThis,
-                     size_t offset,
-                     size_t size);
-} FX_DOWNLOADHINTS;
-
-// Checks if the document is ready for loading, if not, gets download hints.
-//
-//   avail - handle to document availability provider.
-//   hints - pointer to a download hints interface.
-//
-// Returns one of:
-//   PDF_DATA_ERROR: A common error is returned. Data availability unknown.
-//   PDF_DATA_NOTAVAIL: Data not yet available.
-//   PDF_DATA_AVAIL: Data available.
-//
-// Applications should call this function whenever new data arrives, and process
-// all the generated download hints, if any, until the function returns
-// |PDF_DATA_ERROR| or |PDF_DATA_AVAIL|.
-// if hints is nullptr, the function just check current document availability.
-//
-// Once all data is available, call FPDFAvail_GetDocument() to get a document
-// handle.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsDocAvail(FPDF_AVAIL avail,
-                                                   FX_DOWNLOADHINTS* hints);
-
-// Get document from the availability provider.
-//
-//   avail    - handle to document availability provider.
-//   password - password for decrypting the PDF file. Optional.
-//
-// Returns a handle to the document.
-//
-// When FPDFAvail_IsDocAvail() returns TRUE, call FPDFAvail_GetDocument() to
-// retrieve the document handle.
-// See the comments for FPDF_LoadDocument() regarding the encoding for
-// |password|.
-FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
-FPDFAvail_GetDocument(FPDF_AVAIL avail, FPDF_BYTESTRING password);
-
-// Get the page number for the first available page in a linearized PDF.
-//
-//   doc - document handle.
-//
-// Returns the zero-based index for the first available page.
-//
-// For most linearized PDFs, the first available page will be the first page,
-// however, some PDFs might make another page the first available page.
-// For non-linearized PDFs, this function will always return zero.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_GetFirstPageNum(FPDF_DOCUMENT doc);
-
-// Check if |page_index| is ready for loading, if not, get the
-// |FX_DOWNLOADHINTS|.
-//
-//   avail      - handle to document availability provider.
-//   page_index - index number of the page. Zero for the first page.
-//   hints      - pointer to a download hints interface. Populated if
-//                |page_index| is not available.
-//
-// Returns one of:
-//   PDF_DATA_ERROR: A common error is returned. Data availability unknown.
-//   PDF_DATA_NOTAVAIL: Data not yet available.
-//   PDF_DATA_AVAIL: Data available.
-//
-// This function can be called only after FPDFAvail_GetDocument() is called.
-// Applications should call this function whenever new data arrives and process
-// all the generated download |hints|, if any, until this function returns
-// |PDF_DATA_ERROR| or |PDF_DATA_AVAIL|. Applications can then perform page
-// loading.
-// if hints is nullptr, the function just check current availability of
-// specified page.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsPageAvail(FPDF_AVAIL avail,
-                                                    int page_index,
-                                                    FX_DOWNLOADHINTS* hints);
-
-// Check if form data is ready for initialization, if not, get the
-// |FX_DOWNLOADHINTS|.
-//
-//   avail - handle to document availability provider.
-//   hints - pointer to a download hints interface. Populated if form is not
-//           ready for initialization.
-//
-// Returns one of:
-//   PDF_FORM_ERROR: A common eror, in general incorrect parameters.
-//   PDF_FORM_NOTAVAIL: Data not available.
-//   PDF_FORM_AVAIL: Data available.
-//   PDF_FORM_NOTEXIST: No form data.
-//
-// This function can be called only after FPDFAvail_GetDocument() is called.
-// The application should call this function whenever new data arrives and
-// process all the generated download |hints|, if any, until the function
-// |PDF_FORM_ERROR|, |PDF_FORM_AVAIL| or |PDF_FORM_NOTEXIST|.
-// if hints is nullptr, the function just check current form availability.
-//
-// Applications can then perform page loading. It is recommend to call
-// FPDFDOC_InitFormFillEnvironment() when |PDF_FORM_AVAIL| is returned.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsFormAvail(FPDF_AVAIL avail,
-                                                    FX_DOWNLOADHINTS* hints);
-
-// Check whether a document is a linearized PDF.
-//
-//   avail - handle to document availability provider.
-//
-// Returns one of:
-//   PDF_LINEARIZED
-//   PDF_NOT_LINEARIZED
-//   PDF_LINEARIZATION_UNKNOWN
-//
-// FPDFAvail_IsLinearized() will return |PDF_LINEARIZED| or |PDF_NOT_LINEARIZED|
-// when we have 1k  of data. If the files size less than 1k, it returns
-// |PDF_LINEARIZATION_UNKNOWN| as there is insufficient information to determine
-// if the PDF is linearlized.
-FPDF_EXPORT int FPDF_CALLCONV FPDFAvail_IsLinearized(FPDF_AVAIL avail);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_DATAAVAIL_H_

-// 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_DOC_H_
-#define PUBLIC_FPDF_DOC_H_
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Unsupported action type.
-#define PDFACTION_UNSUPPORTED 0
-// Go to a destination within current document.
-#define PDFACTION_GOTO 1
-// Go to a destination within another document.
-#define PDFACTION_REMOTEGOTO 2
-// URI, including web pages and other Internet resources.
-#define PDFACTION_URI 3
-// Launch an application or open a file.
-#define PDFACTION_LAUNCH 4
-// Go to a destination in an embedded file.
-#define PDFACTION_EMBEDDEDGOTO 5
-
-// View destination fit types. See pdfmark reference v9, page 48.
-#define PDFDEST_VIEW_UNKNOWN_MODE 0
-#define PDFDEST_VIEW_XYZ 1
-#define PDFDEST_VIEW_FIT 2
-#define PDFDEST_VIEW_FITH 3
-#define PDFDEST_VIEW_FITV 4
-#define PDFDEST_VIEW_FITR 5
-#define PDFDEST_VIEW_FITB 6
-#define PDFDEST_VIEW_FITBH 7
-#define PDFDEST_VIEW_FITBV 8
-
-// The file identifier entry type. See section 14.4 "File Identifiers" of the
-// ISO 32000-1 standard.
-typedef enum {
-  FILEIDTYPE_PERMANENT = 0,
-  FILEIDTYPE_CHANGING = 1
-} FPDF_FILEIDTYPE;
-
-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;
-
-// Get the first child of |bookmark|, or the first top-level bookmark item.
-//
-//   document - handle to the document.
-//   bookmark - handle to the current bookmark. Pass NULL for the first top
-//              level item.
-//
-// Returns a handle to the first child of |bookmark| or the first top-level
-// bookmark item. NULL if no child or top-level bookmark found.
-FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
-FPDFBookmark_GetFirstChild(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark);
-
-// Get the next sibling of |bookmark|.
-//
-//   document - handle to the document.
-//   bookmark - handle to the current bookmark.
-//
-// Returns a handle to the next sibling of |bookmark|, or NULL if this is the
-// last bookmark at this level.
-FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
-FPDFBookmark_GetNextSibling(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark);
-
-// Get the title of |bookmark|.
-//
-//   bookmark - handle to the bookmark.
-//   buffer   - buffer for the title. May be NULL.
-//   buflen   - the length of the buffer in bytes. May be 0.
-//
-// Returns the number of bytes in the title, including the terminating NUL
-// character. The number of bytes is returned regardless of the |buffer| and
-// |buflen| parameters.
-//
-// Regardless of the platform, the |buffer| is always in UTF-16LE encoding. The
-// string is terminated by a UTF16 NUL character. If |buflen| is less than the
-// required length, or |buffer| is NULL, |buffer| will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFBookmark_GetTitle(FPDF_BOOKMARK bookmark,
-                      void* buffer,
-                      unsigned long buflen);
-
-// Find the bookmark with |title| in |document|.
-//
-//   document - handle to the document.
-//   title    - the UTF-16LE encoded Unicode title for which to search.
-//
-// Returns the handle to the bookmark, or NULL if |title| can't be found.
-//
-// FPDFBookmark_Find() will always return the first bookmark found even if
-// multiple bookmarks have the same |title|.
-FPDF_EXPORT FPDF_BOOKMARK FPDF_CALLCONV
-FPDFBookmark_Find(FPDF_DOCUMENT document, FPDF_WIDESTRING title);
-
-// Get the destination associated with |bookmark|.
-//
-//   document - handle to the document.
-//   bookmark - handle to the bookmark.
-//
-// Returns the handle to the destination data,  NULL if no destination is
-// associated with |bookmark|.
-FPDF_EXPORT FPDF_DEST FPDF_CALLCONV
-FPDFBookmark_GetDest(FPDF_DOCUMENT document, FPDF_BOOKMARK bookmark);
-
-// Get the action associated with |bookmark|.
-//
-//   bookmark - handle to the bookmark.
-//
-// Returns the handle to the action data, or NULL if no action is associated
-// with |bookmark|. When NULL is returned, FPDFBookmark_GetDest() should be
-// called to get the |bookmark| destination data.
-FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV
-FPDFBookmark_GetAction(FPDF_BOOKMARK bookmark);
-
-// Get the type of |action|.
-//
-//   action - handle to the action.
-//
-// Returns one of:
-//   PDFACTION_UNSUPPORTED
-//   PDFACTION_GOTO
-//   PDFACTION_REMOTEGOTO
-//   PDFACTION_URI
-//   PDFACTION_LAUNCH
-FPDF_EXPORT unsigned long FPDF_CALLCONV FPDFAction_GetType(FPDF_ACTION action);
-
-// Get the destination of |action|.
-//
-//   document - handle to the document.
-//   action   - handle to the action. |action| must be a |PDFACTION_GOTO| or
-//              |PDFACTION_REMOTEGOTO|.
-//
-// Returns a handle to the destination data, or NULL on error, typically
-// because the arguments were bad or the action was of the wrong type.
-//
-// In the case of |PDFACTION_REMOTEGOTO|, you must first call
-// FPDFAction_GetFilePath(), then load the document at that path, then pass
-// the document handle from that document as |document| to FPDFAction_GetDest().
-FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFAction_GetDest(FPDF_DOCUMENT document,
-                                                       FPDF_ACTION action);
-
-// Get the file path of |action|.
-//
-//   action - handle to the action. |action| must be a |PDFACTION_LAUNCH| or
-//            |PDFACTION_REMOTEGOTO|.
-//   buffer - a buffer for output the path string. May be NULL.
-//   buflen - the length of the buffer, in bytes. May be 0.
-//
-// Returns the number of bytes in the file path, including the trailing NUL
-// character, or 0 on error, typically because the arguments were bad or the
-// action was of the wrong type.
-//
-// Regardless of the platform, the |buffer| is always in UTF-8 encoding.
-// If |buflen| is less than the returned length, or |buffer| is NULL, |buffer|
-// will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAction_GetFilePath(FPDF_ACTION action, void* buffer, unsigned long buflen);
-
-// Get the URI path of |action|.
-//
-//   document - handle to the document.
-//   action   - handle to the action. Must be a |PDFACTION_URI|.
-//   buffer   - a buffer for the path string. May be NULL.
-//   buflen   - the length of the buffer, in bytes. May be 0.
-//
-// Returns the number of bytes in the URI path, including the trailing NUL
-// character, or 0 on error, typically because the arguments were bad or the
-// action was of the wrong type.
-//
-// The |buffer| is always encoded in 7-bit ASCII. If |buflen| is less than the
-// returned length, or |buffer| is NULL, |buffer| will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFAction_GetURIPath(FPDF_DOCUMENT document,
-                      FPDF_ACTION action,
-                      void* buffer,
-                      unsigned long buflen);
-
-// Get the page index of |dest|.
-//
-//   document - handle to the document.
-//   dest     - handle to the destination.
-//
-// Returns the 0-based page index containing |dest|. Returns -1 on error.
-FPDF_EXPORT int FPDF_CALLCONV FPDFDest_GetDestPageIndex(FPDF_DOCUMENT document,
-                                                        FPDF_DEST dest);
-
-// Experimental API.
-// Get the view (fit type) specified by |dest|.
-//
-//   dest         - handle to the destination.
-//   pNumParams   - receives the number of view parameters, which is at most 4.
-//   pParams      - buffer to write the view parameters. Must be at least 4
-//                  FS_FLOATs long.
-// Returns one of the PDFDEST_VIEW_* constants, PDFDEST_VIEW_UNKNOWN_MODE if
-// |dest| does not specify a view.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFDest_GetView(FPDF_DEST dest, unsigned long* pNumParams, FS_FLOAT* pParams);
-
-// Get the (x, y, zoom) location of |dest| in the destination page, if the
-// destination is in [page /XYZ x y zoom] syntax.
-//
-//   dest       - handle to the destination.
-//   hasXVal    - out parameter; true if the x value is not null
-//   hasYVal    - out parameter; true if the y value is not null
-//   hasZoomVal - out parameter; true if the zoom value is not null
-//   x          - out parameter; the x coordinate, in page coordinates.
-//   y          - out parameter; the y coordinate, in page coordinates.
-//   zoom       - out parameter; the zoom value.
-// Returns TRUE on successfully reading the /XYZ value.
-//
-// Note the [x, y, zoom] values are only set if the corresponding hasXVal,
-// hasYVal or hasZoomVal flags are true.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFDest_GetLocationInPage(FPDF_DEST dest,
-                           FPDF_BOOL* hasXVal,
-                           FPDF_BOOL* hasYVal,
-                           FPDF_BOOL* hasZoomVal,
-                           FS_FLOAT* x,
-                           FS_FLOAT* y,
-                           FS_FLOAT* zoom);
-
-// Find a link at point (|x|,|y|) on |page|.
-//
-//   page - handle to the document page.
-//   x    - the x coordinate, in the page coordinate system.
-//   y    - the y coordinate, in the page coordinate system.
-//
-// Returns a handle to the link, or NULL if no link found at the given point.
-//
-// You can convert coordinates from screen coordinates to page coordinates using
-// FPDF_DeviceToPage().
-FPDF_EXPORT FPDF_LINK FPDF_CALLCONV FPDFLink_GetLinkAtPoint(FPDF_PAGE page,
-                                                            double x,
-                                                            double y);
-
-// Find the Z-order of link at point (|x|,|y|) on |page|.
-//
-//   page - handle to the document page.
-//   x    - the x coordinate, in the page coordinate system.
-//   y    - the y coordinate, in the page coordinate system.
-//
-// Returns the Z-order of the link, or -1 if no link found at the given point.
-// Larger Z-order numbers are closer to the front.
-//
-// You can convert coordinates from screen coordinates to page coordinates using
-// FPDF_DeviceToPage().
-FPDF_EXPORT int FPDF_CALLCONV FPDFLink_GetLinkZOrderAtPoint(FPDF_PAGE page,
-                                                            double x,
-                                                            double y);
-
-// Get destination info for |link|.
-//
-//   document - handle to the document.
-//   link     - handle to the link.
-//
-// Returns a handle to the destination, or NULL if there is no destination
-// associated with the link. In this case, you should call FPDFLink_GetAction()
-// to retrieve the action associated with |link|.
-FPDF_EXPORT FPDF_DEST FPDF_CALLCONV FPDFLink_GetDest(FPDF_DOCUMENT document,
-                                                     FPDF_LINK link);
-
-// Get action info for |link|.
-//
-//   link - handle to the link.
-//
-// Returns a handle to the action associated to |link|, or NULL if no action.
-FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV FPDFLink_GetAction(FPDF_LINK link);
-
-// Enumerates all the link annotations in |page|.
-//
-//   page       - handle to the page.
-//   start_pos  - the start position, should initially be 0 and is updated with
-//                the next start position on return.
-//   link_annot - the link handle for |startPos|.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_Enumerate(FPDF_PAGE page,
-                                                       int* start_pos,
-                                                       FPDF_LINK* link_annot);
-
-// Experimental API.
-// Gets FPDF_ANNOTATION object for |link_annot|.
-//
-//   page       - handle to the page in which FPDF_LINK object is present.
-//   link_annot - handle to link annotation.
-//
-// Returns FPDF_ANNOTATION from the FPDF_LINK and NULL on failure,
-// if the input link annot or page is NULL.
-FPDF_EXPORT FPDF_ANNOTATION FPDF_CALLCONV
-FPDFLink_GetAnnot(FPDF_PAGE page, FPDF_LINK link_annot);
-
-// Get the rectangle for |link_annot|.
-//
-//   link_annot - handle to the link annotation.
-//   rect       - the annotation rectangle.
-//
-// Returns true on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_GetAnnotRect(FPDF_LINK link_annot,
-                                                          FS_RECTF* rect);
-
-// Get the count of quadrilateral points to the |link_annot|.
-//
-//   link_annot - handle to the link annotation.
-//
-// Returns the count of quadrilateral points.
-FPDF_EXPORT int FPDF_CALLCONV FPDFLink_CountQuadPoints(FPDF_LINK link_annot);
-
-// Get the quadrilateral points for the specified |quad_index| in |link_annot|.
-//
-//   link_annot  - handle to the link annotation.
-//   quad_index  - the specified quad point index.
-//   quad_points - receives the quadrilateral points.
-//
-// Returns true on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFLink_GetQuadPoints(FPDF_LINK link_annot,
-                       int quad_index,
-                       FS_QUADPOINTSF* quad_points);
-
-// Experimental API
-// Gets an additional-action from |page|.
-//
-//   page      - handle to the page, as returned by FPDF_LoadPage().
-//   aa_type   - the type of the page object's addtional-action, defined
-//               in public/fpdf_formfill.h
-//
-//   Returns the handle to the action data, or NULL if there is no
-//   additional-action of type |aa_type|.
-FPDF_EXPORT FPDF_ACTION FPDF_CALLCONV FPDF_GetPageAAction(FPDF_PAGE page,
-                                                          int aa_type);
-
-// Experimental API.
-// Get the file identifer defined in the trailer of |document|.
-//
-//   document - handle to the document.
-//   id_type  - the file identifier type to retrieve.
-//   buffer   - a buffer for the file identifier. May be NULL.
-//   buflen   - the length of the buffer, in bytes. May be 0.
-//
-// Returns the number of bytes in the file identifier, including the NUL
-// terminator.
-//
-// The |buffer| is always a byte string. The |buffer| is followed by a NUL
-// terminator.  If |buflen| is less than the returned length, or |buffer| is
-// NULL, |buffer| will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDF_GetFileIdentifier(FPDF_DOCUMENT document,
-                       FPDF_FILEIDTYPE id_type,
-                       void* buffer,
-                       unsigned long buflen);
-
-// Get meta-data |tag| content from |document|.
-//
-//   document - handle to the document.
-//   tag      - the tag to retrieve. The tag can be one of:
-//                Title, Author, Subject, Keywords, Creator, Producer,
-//                CreationDate, or ModDate.
-//              For detailed explanations of these tags and their respective
-//              values, please refer to PDF Reference 1.6, section 10.2.1,
-//              'Document Information Dictionary'.
-//   buffer   - a buffer for the tag. May be NULL.
-//   buflen   - the length of the buffer, in bytes. May be 0.
-//
-// Returns the number of bytes in the tag, including trailing zeros.
-//
-// The |buffer| is always encoded in UTF-16LE. The |buffer| is followed by two
-// bytes of zeros indicating the end of the string.  If |buflen| is less than
-// the returned length, or |buffer| is NULL, |buffer| will not be modified.
-//
-// For linearized files, FPDFAvail_IsFormAvail must be called before this, and
-// it must have returned PDF_FORM_AVAIL or PDF_FORM_NOTEXIST. Before that, there
-// is no guarantee the metadata has been loaded.
-FPDF_EXPORT unsigned long FPDF_CALLCONV FPDF_GetMetaText(FPDF_DOCUMENT document,
-                                                         FPDF_BYTESTRING tag,
-                                                         void* buffer,
-                                                         unsigned long buflen);
-
-// Get the page label for |page_index| from |document|.
-//
-//   document    - handle to the document.
-//   page_index  - the 0-based index of the page.
-//   buffer      - a buffer for the page label. May be NULL.
-//   buflen      - the length of the buffer, in bytes. May be 0.
-//
-// Returns the number of bytes in the page label, including trailing zeros.
-//
-// The |buffer| is always encoded in UTF-16LE. The |buffer| is followed by two
-// bytes of zeros indicating the end of the string.  If |buflen| is less than
-// the returned length, or |buffer| is NULL, |buffer| will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDF_GetPageLabel(FPDF_DOCUMENT document,
-                  int page_index,
-                  void* buffer,
-                  unsigned long buflen);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_DOC_H_

-// 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>
-
-// NOLINTNEXTLINE(build/include)
-#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))
-
-// Refer to PDF Reference version 1.7 table 4.12 for all color space families.
-#define FPDF_COLORSPACE_UNKNOWN 0
-#define FPDF_COLORSPACE_DEVICEGRAY 1
-#define FPDF_COLORSPACE_DEVICERGB 2
-#define FPDF_COLORSPACE_DEVICECMYK 3
-#define FPDF_COLORSPACE_CALGRAY 4
-#define FPDF_COLORSPACE_CALRGB 5
-#define FPDF_COLORSPACE_LAB 6
-#define FPDF_COLORSPACE_ICCBASED 7
-#define FPDF_COLORSPACE_SEPARATION 8
-#define FPDF_COLORSPACE_DEVICEN 9
-#define FPDF_COLORSPACE_INDEXED 10
-#define FPDF_COLORSPACE_PATTERN 11
-
-// The page object constants.
-#define FPDF_PAGEOBJ_UNKNOWN 0
-#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
-
-// The path segment constants.
-#define FPDF_SEGMENT_UNKNOWN -1
-#define FPDF_SEGMENT_LINETO 0
-#define FPDF_SEGMENT_BEZIERTO 1
-#define FPDF_SEGMENT_MOVETO 2
-
-#define FPDF_FILLMODE_NONE 0
-#define FPDF_FILLMODE_ALTERNATE 1
-#define FPDF_FILLMODE_WINDING 2
-
-#define FPDF_FONT_TYPE1 1
-#define FPDF_FONT_TRUETYPE 2
-
-#define FPDF_LINECAP_BUTT 0
-#define FPDF_LINECAP_ROUND 1
-#define FPDF_LINECAP_PROJECTING_SQUARE 2
-
-#define FPDF_LINEJOIN_MITER 0
-#define FPDF_LINEJOIN_ROUND 1
-#define FPDF_LINEJOIN_BEVEL 2
-
-// See FPDF_SetPrintMode() for descriptions.
-#define FPDF_PRINTMODE_EMF 0
-#define FPDF_PRINTMODE_TEXTONLY 1
-#define FPDF_PRINTMODE_POSTSCRIPT2 2
-#define FPDF_PRINTMODE_POSTSCRIPT3 3
-#define FPDF_PRINTMODE_POSTSCRIPT2_PASSTHROUGH 4
-#define FPDF_PRINTMODE_POSTSCRIPT3_PASSTHROUGH 5
-#define FPDF_PRINTMODE_EMF_IMAGE_MASKS 6
-
-typedef struct FPDF_IMAGEOBJ_METADATA {
-  // The image width in pixels.
-  unsigned int width;
-  // The image height in pixels.
-  unsigned int height;
-  // The image's horizontal pixel-per-inch.
-  float horizontal_dpi;
-  // The image's vertical pixel-per-inch.
-  float vertical_dpi;
-  // The number of bits used to represent each pixel.
-  unsigned int bits_per_pixel;
-  // The image's colorspace. See above for the list of FPDF_COLORSPACE_*.
-  int colorspace;
-  // The image's marked content ID. Useful for pairing with associated alt-text.
-  // A value of -1 indicates no ID.
-  int marked_content_id;
-} FPDF_IMAGEOBJ_METADATA;
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Create a new PDF document.
-//
-// Returns a handle to a new document, or NULL on failure.
-FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV FPDF_CreateNewDocument();
-
-// Create a new PDF page.
-//
-//   document   - handle to document.
-//   page_index - suggested 0-based 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 in points.
-//   height     - the page height in points.
-//
-// Returns the handle to the new page or NULL on failure.
-//
-// The page should be closed with FPDF_ClosePage() when finished as
-// with any other page in the document.
-FPDF_EXPORT FPDF_PAGE FPDF_CALLCONV 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.
-FPDF_EXPORT void FPDF_CALLCONV 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.
-FPDF_EXPORT int FPDF_CALLCONV 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.
-FPDF_EXPORT void FPDF_CALLCONV 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.
-FPDF_EXPORT void FPDF_CALLCONV FPDFPage_InsertObject(FPDF_PAGE page,
-                                                     FPDF_PAGEOBJECT page_obj);
-
-// Experimental API.
-// Remove |page_obj| from |page|.
-//
-//   page     - handle to a page
-//   page_obj - handle to a page object to be removed.
-//
-// Returns TRUE on success.
-//
-// Ownership is transferred to the caller. Call FPDFPageObj_Destroy() to free
-// it.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPage_RemoveObject(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|.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPage_CountObjects(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.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV FPDFPage_GetObject(FPDF_PAGE page,
-                                                             int index);
-
-// Checks if |page| contains transparency.
-//
-//   page - handle to a page.
-//
-// Returns TRUE if |page| contains transparency.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV 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.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPage_GenerateContent(FPDF_PAGE page);
-
-// Destroy |page_obj| by releasing its resources. |page_obj| must have been
-// created by FPDFPageObj_CreateNew{Path|Rect}() or
-// FPDFPageObj_New{Text|Image}Obj(). This function must be called on
-// newly-created objects if they are not added to a page through
-// FPDFPage_InsertObject() or to an annotation through FPDFAnnot_AppendObject().
-//
-//   page_obj - handle to a page object.
-FPDF_EXPORT void FPDF_CALLCONV FPDFPageObj_Destroy(FPDF_PAGEOBJECT page_obj);
-
-// Checks if |page_object| contains transparency.
-//
-//   page_object - handle to a page object.
-//
-// Returns TRUE if |page_object| contains transparency.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_HasTransparency(FPDF_PAGEOBJECT page_object);
-
-// Get type of |page_object|.
-//
-//   page_object - handle to a page object.
-//
-// Returns one of the FPDF_PAGEOBJ_* values on success, FPDF_PAGEOBJ_UNKNOWN on
-// error.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPageObj_GetType(FPDF_PAGEOBJECT page_object);
-
-// Transform |page_object| 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|.
-FPDF_EXPORT void FPDF_CALLCONV
-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.
-FPDF_EXPORT void FPDF_CALLCONV 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.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
-FPDFPageObj_NewImageObj(FPDF_DOCUMENT document);
-
-// Experimental API.
-// Get number of content marks in |page_object|.
-//
-//   page_object - handle to a page object.
-//
-// Returns the number of content marks in |page_object|, or -1 in case of
-// failure.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFPageObj_CountMarks(FPDF_PAGEOBJECT page_object);
-
-// Experimental API.
-// Get content mark in |page_object| at |index|.
-//
-//   page_object - handle to a page object.
-//   index       - the index of a page object.
-//
-// Returns the handle to the content mark, or NULL on failure. The handle is
-// still owned by the library, and it should not be freed directly. It becomes
-// invalid if the page object is destroyed, either directly or indirectly by
-// unloading the page.
-FPDF_EXPORT FPDF_PAGEOBJECTMARK FPDF_CALLCONV
-FPDFPageObj_GetMark(FPDF_PAGEOBJECT page_object, unsigned long index);
-
-// Experimental API.
-// Add a new content mark to a |page_object|.
-//
-//   page_object - handle to a page object.
-//   name        - the name (tag) of the mark.
-//
-// Returns the handle to the content mark, or NULL on failure. The handle is
-// still owned by the library, and it should not be freed directly. It becomes
-// invalid if the page object is destroyed, either directly or indirectly by
-// unloading the page.
-FPDF_EXPORT FPDF_PAGEOBJECTMARK FPDF_CALLCONV
-FPDFPageObj_AddMark(FPDF_PAGEOBJECT page_object, FPDF_BYTESTRING name);
-
-// Experimental API.
-// Removes a content |mark| from a |page_object|.
-// The mark handle will be invalid after the removal.
-//
-//   page_object - handle to a page object.
-//   mark        - handle to a content mark in that object to remove.
-//
-// Returns TRUE if the operation succeeded, FALSE if it failed.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_RemoveMark(FPDF_PAGEOBJECT page_object, FPDF_PAGEOBJECTMARK mark);
-
-// Experimental API.
-// Get the name of a content mark.
-//
-//   mark       - handle to a content mark.
-//   buffer     - buffer for holding the returned name in UTF-16LE. This is only
-//                modified if |buflen| is longer than the length of the name.
-//                Optional, pass null to just retrieve the size of the buffer
-//                needed.
-//   buflen     - length of the buffer.
-//   out_buflen - pointer to variable that will receive the minimum buffer size
-//                to contain the name. Not filled if FALSE is returned.
-//
-// Returns TRUE if the operation succeeded, FALSE if it failed.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_GetName(FPDF_PAGEOBJECTMARK mark,
-                        void* buffer,
-                        unsigned long buflen,
-                        unsigned long* out_buflen);
-
-// Experimental API.
-// Get the number of key/value pair parameters in |mark|.
-//
-//   mark   - handle to a content mark.
-//
-// Returns the number of key/value pair parameters |mark|, or -1 in case of
-// failure.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFPageObjMark_CountParams(FPDF_PAGEOBJECTMARK mark);
-
-// Experimental API.
-// Get the key of a property in a content mark.
-//
-//   mark       - handle to a content mark.
-//   index      - index of the property.
-//   buffer     - buffer for holding the returned key in UTF-16LE. This is only
-//                modified if |buflen| is longer than the length of the key.
-//                Optional, pass null to just retrieve the size of the buffer
-//                needed.
-//   buflen     - length of the buffer.
-//   out_buflen - pointer to variable that will receive the minimum buffer size
-//                to contain the key. Not filled if FALSE is returned.
-//
-// Returns TRUE if the operation was successful, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_GetParamKey(FPDF_PAGEOBJECTMARK mark,
-                            unsigned long index,
-                            void* buffer,
-                            unsigned long buflen,
-                            unsigned long* out_buflen);
-
-// Experimental API.
-// Get the type of the value of a property in a content mark by key.
-//
-//   mark   - handle to a content mark.
-//   key    - string key of the property.
-//
-// Returns the type of the value, or FPDF_OBJECT_UNKNOWN in case of failure.
-FPDF_EXPORT FPDF_OBJECT_TYPE FPDF_CALLCONV
-FPDFPageObjMark_GetParamValueType(FPDF_PAGEOBJECTMARK mark,
-                                  FPDF_BYTESTRING key);
-
-// Experimental API.
-// Get the value of a number property in a content mark by key as int.
-// FPDFPageObjMark_GetParamValueType() should have returned FPDF_OBJECT_NUMBER
-// for this property.
-//
-//   mark      - handle to a content mark.
-//   key       - string key of the property.
-//   out_value - pointer to variable that will receive the value. Not filled if
-//               false is returned.
-//
-// Returns TRUE if the key maps to a number value, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_GetParamIntValue(FPDF_PAGEOBJECTMARK mark,
-                                 FPDF_BYTESTRING key,
-                                 int* out_value);
-
-// Experimental API.
-// Get the value of a string property in a content mark by key.
-//
-//   mark       - handle to a content mark.
-//   key        - string key of the property.
-//   buffer     - buffer for holding the returned value in UTF-16LE. This is
-//                only modified if |buflen| is longer than the length of the
-//                value.
-//                Optional, pass null to just retrieve the size of the buffer
-//                needed.
-//   buflen     - length of the buffer.
-//   out_buflen - pointer to variable that will receive the minimum buffer size
-//                to contain the value. Not filled if FALSE is returned.
-//
-// Returns TRUE if the key maps to a string/blob value, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_GetParamStringValue(FPDF_PAGEOBJECTMARK mark,
-                                    FPDF_BYTESTRING key,
-                                    void* buffer,
-                                    unsigned long buflen,
-                                    unsigned long* out_buflen);
-
-// Experimental API.
-// Get the value of a blob property in a content mark by key.
-//
-//   mark       - handle to a content mark.
-//   key        - string key of the property.
-//   buffer     - buffer for holding the returned value. This is only modified
-//                if |buflen| is at least as long as the length of the value.
-//                Optional, pass null to just retrieve the size of the buffer
-//                needed.
-//   buflen     - length of the buffer.
-//   out_buflen - pointer to variable that will receive the minimum buffer size
-//                to contain the value. Not filled if FALSE is returned.
-//
-// Returns TRUE if the key maps to a string/blob value, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_GetParamBlobValue(FPDF_PAGEOBJECTMARK mark,
-                                  FPDF_BYTESTRING key,
-                                  void* buffer,
-                                  unsigned long buflen,
-                                  unsigned long* out_buflen);
-
-// Experimental API.
-// Set the value of an int property in a content mark by key. If a parameter
-// with key |key| exists, its value is set to |value|. Otherwise, it is added as
-// a new parameter.
-//
-//   document    - handle to the document.
-//   page_object - handle to the page object with the mark.
-//   mark        - handle to a content mark.
-//   key         - string key of the property.
-//   value       - int value to set.
-//
-// Returns TRUE if the operation succeeded, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_SetIntParam(FPDF_DOCUMENT document,
-                            FPDF_PAGEOBJECT page_object,
-                            FPDF_PAGEOBJECTMARK mark,
-                            FPDF_BYTESTRING key,
-                            int value);
-
-// Experimental API.
-// Set the value of a string property in a content mark by key. If a parameter
-// with key |key| exists, its value is set to |value|. Otherwise, it is added as
-// a new parameter.
-//
-//   document    - handle to the document.
-//   page_object - handle to the page object with the mark.
-//   mark        - handle to a content mark.
-//   key         - string key of the property.
-//   value       - string value to set.
-//
-// Returns TRUE if the operation succeeded, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_SetStringParam(FPDF_DOCUMENT document,
-                               FPDF_PAGEOBJECT page_object,
-                               FPDF_PAGEOBJECTMARK mark,
-                               FPDF_BYTESTRING key,
-                               FPDF_BYTESTRING value);
-
-// Experimental API.
-// Set the value of a blob property in a content mark by key. If a parameter
-// with key |key| exists, its value is set to |value|. Otherwise, it is added as
-// a new parameter.
-//
-//   document    - handle to the document.
-//   page_object - handle to the page object with the mark.
-//   mark        - handle to a content mark.
-//   key         - string key of the property.
-//   value       - pointer to blob value to set.
-//   value_len   - size in bytes of |value|.
-//
-// Returns TRUE if the operation succeeded, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_SetBlobParam(FPDF_DOCUMENT document,
-                             FPDF_PAGEOBJECT page_object,
-                             FPDF_PAGEOBJECTMARK mark,
-                             FPDF_BYTESTRING key,
-                             void* value,
-                             unsigned long value_len);
-
-// Experimental API.
-// Removes a property from a content mark by key.
-//
-//   page_object - handle to the page object with the mark.
-//   mark        - handle to a content mark.
-//   key         - string key of the property.
-//
-// Returns TRUE if the operation succeeded, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObjMark_RemoveParam(FPDF_PAGEOBJECT page_object,
-                            FPDF_PAGEOBJECTMARK mark,
-                            FPDF_BYTESTRING key);
-
-// 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.
-//   count        - number of |pages|, may be 0.
-//   image_object - handle to an image object.
-//   file_access  - 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 (|count|) to this API
-// to clear the image cache. If the image is not previously shared, or NULL is a
-// valid |pages| value.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages,
-                          int count,
-                          FPDF_PAGEOBJECT image_object,
-                          FPDF_FILEACCESS* file_access);
-
-// 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.
-//   count        - number of |pages|, may be 0.
-//   image_object - handle to an image object.
-//   file_access  - 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 (|count|) to this API
-// to clear the image cache. If the image is not previously shared, or NULL is a
-// valid |pages| value. This function loads the JPEG image inline, so the image
-// content is copied to the file. This allows |file_access| and its associated
-// data to be deleted after this function returns.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFImageObj_LoadJpegFileInline(FPDF_PAGE* pages,
-                                int count,
-                                FPDF_PAGEOBJECT image_object,
-                                FPDF_FILEACCESS* file_access);
-
-// Experimental API.
-// Get the transform matrix of an 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 used to scale, rotate, shear and translate the image.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFImageObj_GetMatrix(FPDF_PAGEOBJECT image_object,
-                       double* a,
-                       double* b,
-                       double* c,
-                       double* d,
-                       double* e,
-                       double* f);
-
-// 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 |image_object|.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-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.
-//   count        - number of |pages|, may be 0.
-//   image_object - handle to an image object.
-//   bitmap       - handle of the bitmap.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFImageObj_SetBitmap(FPDF_PAGE* pages,
-                       int count,
-                       FPDF_PAGEOBJECT image_object,
-                       FPDF_BITMAP bitmap);
-
-// Get a bitmap rasterization of |image_object|. FPDFImageObj_GetBitmap() only
-// operates on |image_object| and does not take the associated image mask into
-// account. It also ignores the matrix for |image_object|.
-// The returned bitmap will be owned by the caller, and FPDFBitmap_Destroy()
-// must be called on the returned bitmap when it is no longer needed.
-//
-//   image_object - handle to an image object.
-//
-// Returns the bitmap.
-FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV
-FPDFImageObj_GetBitmap(FPDF_PAGEOBJECT image_object);
-
-// Experimental API.
-// Get a bitmap rasterization of |image_object| that takes the image mask and
-// image matrix into account. To render correctly, the caller must provide the
-// |document| associated with |image_object|. If there is a |page| associated
-// with |image_object| the caller should provide that as well.
-// The returned bitmap will be owned by the caller, and FPDFBitmap_Destroy()
-// must be called on the returned bitmap when it is no longer needed.
-//
-//   document     - handle to a document associated with |image_object|.
-//   page         - handle to an optional page associated with |image_object|.
-//   image_object - handle to an image object.
-//
-// Returns the bitmap.
-FPDF_EXPORT FPDF_BITMAP FPDF_CALLCONV
-FPDFImageObj_GetRenderedBitmap(FPDF_DOCUMENT document,
-                               FPDF_PAGE page,
-                               FPDF_PAGEOBJECT image_object);
-
-// Get the decoded image data of |image_object|. The decoded data is the
-// uncompressed image data, i.e. the raw image data after having all filters
-// applied. |buffer| is only modified if |buflen| is longer than the length of
-// the decoded image data.
-//
-//   image_object - handle to an image object.
-//   buffer       - buffer for holding the decoded image data.
-//   buflen       - length of the buffer in bytes.
-//
-// Returns the length of the decoded image data.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFImageObj_GetImageDataDecoded(FPDF_PAGEOBJECT image_object,
-                                 void* buffer,
-                                 unsigned long buflen);
-
-// Get the raw image data of |image_object|. The raw data is the image data as
-// stored in the PDF without applying any filters. |buffer| is only modified if
-// |buflen| is longer than the length of the raw image data.
-//
-//   image_object - handle to an image object.
-//   buffer       - buffer for holding the raw image data.
-//   buflen       - length of the buffer in bytes.
-//
-// Returns the length of the raw image data.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFImageObj_GetImageDataRaw(FPDF_PAGEOBJECT image_object,
-                             void* buffer,
-                             unsigned long buflen);
-
-// Get the number of filters (i.e. decoders) of the image in |image_object|.
-//
-//   image_object - handle to an image object.
-//
-// Returns the number of |image_object|'s filters.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFImageObj_GetImageFilterCount(FPDF_PAGEOBJECT image_object);
-
-// Get the filter at |index| of |image_object|'s list of filters. Note that the
-// filters need to be applied in order, i.e. the first filter should be applied
-// first, then the second, etc. |buffer| is only modified if |buflen| is longer
-// than the length of the filter string.
-//
-//   image_object - handle to an image object.
-//   index        - the index of the filter requested.
-//   buffer       - buffer for holding filter string, encoded in UTF-8.
-//   buflen       - length of the buffer.
-//
-// Returns the length of the filter string.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFImageObj_GetImageFilter(FPDF_PAGEOBJECT image_object,
-                            int index,
-                            void* buffer,
-                            unsigned long buflen);
-
-// Get the image metadata of |image_object|, including dimension, DPI, bits per
-// pixel, and colorspace. If the |image_object| is not an image object or if it
-// does not have an image, then the return value will be false. Otherwise,
-// failure to retrieve any specific parameter would result in its value being 0.
-//
-//   image_object - handle to an image object.
-//   page         - handle to the page that |image_object| is on. Required for
-//                  retrieving the image's bits per pixel and colorspace.
-//   metadata     - receives the image metadata; must not be NULL.
-//
-// Returns true if successful.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFImageObj_GetImageMetadata(FPDF_PAGEOBJECT image_object,
-                              FPDF_PAGE page,
-                              FPDF_IMAGEOBJ_METADATA* metadata);
-
-// Create a new path object at an initial position.
-//
-//   x - initial horizontal position.
-//   y - initial vertical position.
-//
-// Returns a handle to a new path object.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV FPDFPageObj_CreateNewPath(float x,
-                                                                    float y);
-
-// Create a closed path consisting of a rectangle.
-//
-//   x - horizontal position for the left boundary of the rectangle.
-//   y - vertical position for the bottom boundary of the rectangle.
-//   w - width of the rectangle.
-//   h - height of the rectangle.
-//
-// Returns a handle to the new path object.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV FPDFPageObj_CreateNewRect(float x,
-                                                                    float y,
-                                                                    float w,
-                                                                    float h);
-
-// Get the bounding box of |page_object|.
-//
-// page_object  - handle to a page object.
-// left         - pointer where the left coordinate will be stored
-// bottom       - pointer where the bottom coordinate will be stored
-// right        - pointer where the right coordinate will be stored
-// top          - pointer where the top coordinate will be stored
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_GetBounds(FPDF_PAGEOBJECT page_object,
-                      float* left,
-                      float* bottom,
-                      float* right,
-                      float* top);
-
-// Set the blend mode of |page_object|.
-//
-// page_object  - handle to a page object.
-// blend_mode   - string containing the blend mode.
-//
-// Blend mode can be one of following: Color, ColorBurn, ColorDodge, Darken,
-// Difference, Exclusion, HardLight, Hue, Lighten, Luminosity, Multiply, Normal,
-// Overlay, Saturation, Screen, SoftLight
-FPDF_EXPORT void FPDF_CALLCONV
-FPDFPageObj_SetBlendMode(FPDF_PAGEOBJECT page_object,
-                         FPDF_BYTESTRING blend_mode);
-
-// Set the stroke RGBA of a page object. Range of values: 0 - 255.
-//
-// page_object  - the handle to the page object.
-// R            - the red component for the object's stroke color.
-// G            - the green component for the object's stroke color.
-// B            - the blue component for the object's stroke color.
-// A            - the stroke alpha for the object.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_SetStrokeColor(FPDF_PAGEOBJECT page_object,
-                           unsigned int R,
-                           unsigned int G,
-                           unsigned int B,
-                           unsigned int A);
-
-// Get the stroke RGBA of a page object. Range of values: 0 - 255.
-//
-// page_object  - the handle to the page object.
-// R            - the red component of the path stroke color.
-// G            - the green component of the object's stroke color.
-// B            - the blue component of the object's stroke color.
-// A            - the stroke alpha of the object.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_GetStrokeColor(FPDF_PAGEOBJECT page_object,
-                           unsigned int* R,
-                           unsigned int* G,
-                           unsigned int* B,
-                           unsigned int* A);
-
-// Set the stroke width of a page object.
-//
-// path   - the handle to the page object.
-// width  - the width of the stroke.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_SetStrokeWidth(FPDF_PAGEOBJECT page_object, float width);
-
-// Experimental API.
-// Get the stroke width of a page object.
-//
-// path   - the handle to the page object.
-// width  - the width of the stroke.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_GetStrokeWidth(FPDF_PAGEOBJECT page_object, float* width);
-
-// Get the line join of |page_object|.
-//
-// page_object  - handle to a page object.
-//
-// Returns the line join, or -1 on failure.
-// Line join can be one of following: FPDF_LINEJOIN_MITER, FPDF_LINEJOIN_ROUND,
-// FPDF_LINEJOIN_BEVEL
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFPageObj_GetLineJoin(FPDF_PAGEOBJECT page_object);
-
-// Set the line join of |page_object|.
-//
-// page_object  - handle to a page object.
-// line_join    - line join
-//
-// Line join can be one of following: FPDF_LINEJOIN_MITER, FPDF_LINEJOIN_ROUND,
-// FPDF_LINEJOIN_BEVEL
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_SetLineJoin(FPDF_PAGEOBJECT page_object, int line_join);
-
-// Get the line cap of |page_object|.
-//
-// page_object - handle to a page object.
-//
-// Returns the line cap, or -1 on failure.
-// Line cap can be one of following: FPDF_LINECAP_BUTT, FPDF_LINECAP_ROUND,
-// FPDF_LINECAP_PROJECTING_SQUARE
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFPageObj_GetLineCap(FPDF_PAGEOBJECT page_object);
-
-// Set the line cap of |page_object|.
-//
-// page_object - handle to a page object.
-// line_cap    - line cap
-//
-// Line cap can be one of following: FPDF_LINECAP_BUTT, FPDF_LINECAP_ROUND,
-// FPDF_LINECAP_PROJECTING_SQUARE
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_SetLineCap(FPDF_PAGEOBJECT page_object, int line_cap);
-
-// Set the fill RGBA of a page object. Range of values: 0 - 255.
-//
-// page_object  - the handle to the page object.
-// R            - the red component for the object's fill color.
-// G            - the green component for the object's fill color.
-// B            - the blue component for the object's fill color.
-// A            - the fill alpha for the object.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_SetFillColor(FPDF_PAGEOBJECT page_object,
-                         unsigned int R,
-                         unsigned int G,
-                         unsigned int B,
-                         unsigned int A);
-
-// Get the fill RGBA of a page object. Range of values: 0 - 255.
-//
-// page_object  - the handle to the page object.
-// R            - the red component of the object's fill color.
-// G            - the green component of the object's fill color.
-// B            - the blue component of the object's fill color.
-// A            - the fill alpha of the object.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPageObj_GetFillColor(FPDF_PAGEOBJECT page_object,
-                         unsigned int* R,
-                         unsigned int* G,
-                         unsigned int* B,
-                         unsigned int* A);
-
-// Experimental API.
-// Get number of segments inside |path|.
-//
-//   path - handle to a path.
-//
-// A segment is a command, created by e.g. FPDFPath_MoveTo(),
-// FPDFPath_LineTo() or FPDFPath_BezierTo().
-//
-// Returns the number of objects in |path| or -1 on failure.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPath_CountSegments(FPDF_PAGEOBJECT path);
-
-// Experimental API.
-// Get segment in |path| at |index|.
-//
-//   path  - handle to a path.
-//   index - the index of a segment.
-//
-// Returns the handle to the segment, or NULL on faiure.
-FPDF_EXPORT FPDF_PATHSEGMENT FPDF_CALLCONV
-FPDFPath_GetPathSegment(FPDF_PAGEOBJECT path, int index);
-
-// Experimental API.
-// Get coordinates of |segment|.
-//
-//   segment  - handle to a segment.
-//   x      - the horizontal position of the segment.
-//   y      - the vertical position of the segment.
-//
-// Returns TRUE on success, otherwise |x| and |y| is not set.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPathSegment_GetPoint(FPDF_PATHSEGMENT segment, float* x, float* y);
-
-// Experimental API.
-// Get type of |segment|.
-//
-//   segment - handle to a segment.
-//
-// Returns one of the FPDF_SEGMENT_* values on success,
-// FPDF_SEGMENT_UNKNOWN on error.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPathSegment_GetType(FPDF_PATHSEGMENT segment);
-
-// Experimental API.
-// Gets if the |segment| closes the current subpath of a given path.
-//
-//   segment - handle to a segment.
-//
-// Returns close flag for non-NULL segment, FALSE otherwise.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFPathSegment_GetClose(FPDF_PATHSEGMENT segment);
-
-// Move a path's current point.
-//
-// path   - the handle to the path object.
-// x      - the horizontal position of the new current point.
-// y      - the vertical position of the new current point.
-//
-// Note that no line will be created between the previous current point and the
-// new one.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_MoveTo(FPDF_PAGEOBJECT path,
-                                                    float x,
-                                                    float y);
-
-// Add a line between the current point and a new point in the path.
-//
-// path   - the handle to the path object.
-// x      - the horizontal position of the new point.
-// y      - the vertical position of the new point.
-//
-// The path's current point is changed to (x, y).
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_LineTo(FPDF_PAGEOBJECT path,
-                                                    float x,
-                                                    float y);
-
-// Add a cubic Bezier curve to the given path, starting at the current point.
-//
-// path   - the handle to the path object.
-// x1     - the horizontal position of the first Bezier control point.
-// y1     - the vertical position of the first Bezier control point.
-// x2     - the horizontal position of the second Bezier control point.
-// y2     - the vertical position of the second Bezier control point.
-// x3     - the horizontal position of the ending point of the Bezier curve.
-// y3     - the vertical position of the ending point of the Bezier curve.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_BezierTo(FPDF_PAGEOBJECT path,
-                                                      float x1,
-                                                      float y1,
-                                                      float x2,
-                                                      float y2,
-                                                      float x3,
-                                                      float y3);
-
-// Close the current subpath of a given path.
-//
-// path   - the handle to the path object.
-//
-// This will add a line between the current point and the initial point of the
-// subpath, thus terminating the current subpath.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_Close(FPDF_PAGEOBJECT path);
-
-// Set the drawing mode of a path.
-//
-// path     - the handle to the path object.
-// fillmode - the filling mode to be set: one of the FPDF_FILLMODE_* flags.
-// stroke   - a boolean specifying if the path should be stroked or not.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_SetDrawMode(FPDF_PAGEOBJECT path,
-                                                         int fillmode,
-                                                         FPDF_BOOL stroke);
-
-// Experimental API.
-// Get the drawing mode of a path.
-//
-// path     - the handle to the path object.
-// fillmode - the filling mode of the path: one of the FPDF_FILLMODE_* flags.
-// stroke   - a boolean specifying if the path is stroked or not.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_GetDrawMode(FPDF_PAGEOBJECT path,
-                                                         int* fillmode,
-                                                         FPDF_BOOL* stroke);
-
-// Experimental API.
-// Get the transform matrix of a path.
-//
-//   path   - handle to a path.
-//   matrix - pointer to struct to receive the matrix value.
-//
-// The matrix is composed as:
-//   |a c e|
-//   |b d f|
-// and used to scale, rotate, shear and translate the path.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_GetMatrix(FPDF_PAGEOBJECT path,
-                                                       FS_MATRIX* matrix);
-
-// Experimental API.
-// Set the transform matrix of a path.
-//
-//   path   - handle to a path.
-//   matrix - pointer to struct with the matrix value.
-//
-// The matrix is composed as:
-//   |a c e|
-//   |b d f|
-// and can be used to scale, rotate, shear and translate the path.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFPath_SetMatrix(FPDF_PAGEOBJECT path,
-                                                       const FS_MATRIX* matrix);
-
-// Create a new text object using one of the standard PDF fonts.
-//
-// document   - handle to the document.
-// font       - string containing the font name, without spaces.
-// font_size  - the font size for the new text object.
-//
-// Returns a handle to a new text object, or NULL on failure
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
-FPDFPageObj_NewTextObj(FPDF_DOCUMENT document,
-                       FPDF_BYTESTRING font,
-                       float font_size);
-
-// Set the text for a textobject. If it had text, it will be replaced.
-//
-// text_object  - handle to the text object.
-// text         - the UTF-16LE encoded string containing the text to be added.
-//
-// Returns TRUE on success
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFText_SetText(FPDF_PAGEOBJECT text_object, FPDF_WIDESTRING text);
-
-// Returns a font object loaded from a stream of data. The font is loaded
-// into the document.
-//
-// document   - handle to the document.
-// data       - the stream of data, which will be copied by the font object.
-// size       - size of the stream, in bytes.
-// font_type  - FPDF_FONT_TYPE1 or FPDF_FONT_TRUETYPE depending on the font
-// type.
-// cid        - a boolean specifying if the font is a CID font or not.
-//
-// The loaded font can be closed using FPDFFont_Close.
-//
-// Returns NULL on failure
-FPDF_EXPORT FPDF_FONT FPDF_CALLCONV FPDFText_LoadFont(FPDF_DOCUMENT document,
-                                                      const uint8_t* data,
-                                                      uint32_t size,
-                                                      int font_type,
-                                                      FPDF_BOOL cid);
-
-// Experimental API.
-// Loads one of the standard 14 fonts per PDF spec 1.7 page 416. The preferred
-// way of using font style is using a dash to separate the name from the style,
-// for example 'Helvetica-BoldItalic'.
-//
-// document   - handle to the document.
-// font       - string containing the font name, without spaces.
-//
-// The loaded font can be closed using FPDFFont_Close.
-//
-// Returns NULL on failure.
-FPDF_EXPORT FPDF_FONT FPDF_CALLCONV
-FPDFText_LoadStandardFont(FPDF_DOCUMENT document, FPDF_BYTESTRING font);
-
-// Experimental API.
-// Get the transform matrix of a text object.
-//
-//   text   - handle to a text.
-//   matrix - pointer to struct with the matrix value.
-//
-// The matrix is composed as:
-//   |a c e|
-//   |b d f|
-// and used to scale, rotate, shear and translate the text.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFTextObj_GetMatrix(FPDF_PAGEOBJECT text,
-                                                          FS_MATRIX* matrix);
-
-// Experimental API.
-// Get the font size of a text object.
-//
-//   text - handle to a text.
-//
-// Returns the font size of the text object, measured in points (about 1/72
-// inch) on success; 0 on failure.
-FPDF_EXPORT float FPDF_CALLCONV FPDFTextObj_GetFontSize(FPDF_PAGEOBJECT text);
-
-// Close a loaded PDF font.
-//
-// font   - Handle to the loaded font.
-FPDF_EXPORT void FPDF_CALLCONV FPDFFont_Close(FPDF_FONT font);
-
-// Create a new text object using a loaded font.
-//
-// document   - handle to the document.
-// font       - handle to the font object.
-// font_size  - the font size for the new text object.
-//
-// Returns a handle to a new text object, or NULL on failure
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
-FPDFPageObj_CreateTextObj(FPDF_DOCUMENT document,
-                          FPDF_FONT font,
-                          float font_size);
-
-// Experimental API.
-// Get the text rendering mode of a text object.
-//
-// text     - the handle to the text object.
-//
-// Returns one of the known FPDF_TEXT_RENDERMODE enum values on success,
-// FPDF_TEXTRENDERMODE_UNKNOWN on error.
-FPDF_EXPORT FPDF_TEXT_RENDERMODE FPDF_CALLCONV
-FPDFTextObj_GetTextRenderMode(FPDF_PAGEOBJECT text);
-
-// Experimental API.
-// Set the text rendering mode of a text object.
-//
-// text         - the handle to the text object.
-// render_mode  - the FPDF_TEXT_RENDERMODE enum value to be set (cannot set to
-//                FPDF_TEXTRENDERMODE_UNKNOWN).
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFTextObj_SetTextRenderMode(FPDF_PAGEOBJECT text,
-                              FPDF_TEXT_RENDERMODE render_mode);
-
-// Experimental API.
-// Get the font name of a text object.
-//
-// text             - the handle to the text object.
-// buffer           - the address of a buffer that receives the font name.
-// length           - the size, in bytes, of |buffer|.
-//
-// Returns the number of bytes in the font name (including the trailing NUL
-// character) on success, 0 on error.
-//
-// Regardless of the platform, the |buffer| is always in UTF-8 encoding.
-// If |length| is less than the returned length, or |buffer| is NULL, |buffer|
-// will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFTextObj_GetFontName(FPDF_PAGEOBJECT text,
-                        void* buffer,
-                        unsigned long length);
-
-// Experimental API.
-// Get the text of a text object.
-//
-// text_object      - the handle to the text object.
-// text_page        - the handle to the text page.
-// buffer           - the address of a buffer that receives the text.
-// length           - the size, in bytes, of |buffer|.
-//
-// Returns the number of bytes in the text (including the trailing NUL
-// character) on success, 0 on error.
-//
-// Regardless of the platform, the |buffer| is always in UTF-16LE encoding.
-// If |length| is less than the returned length, or |buffer| is NULL, |buffer|
-// will not be modified.
-FPDF_EXPORT unsigned long FPDF_CALLCONV
-FPDFTextObj_GetText(FPDF_PAGEOBJECT text_object,
-                    FPDF_TEXTPAGE text_page,
-                    void* buffer,
-                    unsigned long length);
-
-// Experimental API.
-// Get number of page objects inside |form_object|.
-//
-//   form_object - handle to a form object.
-//
-// Returns the number of objects in |form_object| on success, -1 on error.
-FPDF_EXPORT int FPDF_CALLCONV
-FPDFFormObj_CountObjects(FPDF_PAGEOBJECT form_object);
-
-// Experimental API.
-// Get page object in |form_object| at |index|.
-//
-//   form_object - handle to a form object.
-//   index       - the 0-based index of a page object.
-//
-// Returns the handle to the page object, or NULL on error.
-FPDF_EXPORT FPDF_PAGEOBJECT FPDF_CALLCONV
-FPDFFormObj_GetObject(FPDF_PAGEOBJECT form_object, unsigned long index);
-
-// Experimental API.
-// Get the transform matrix of a form object.
-//
-//   form_object - handle to a form.
-//   matrix      - pointer to struct to receive the matrix value.
-//
-// The matrix is composed as:
-//   |a c e|
-//   |b d f|
-// and used to scale, rotate, shear and translate the form object.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FPDFFormObj_GetMatrix(FPDF_PAGEOBJECT form_object, FS_MATRIX* matrix);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_EDIT_H_

-// 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_EXT_H_
-#define PUBLIC_FPDF_EXT_H_
-
-#include <time.h>
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Unsupported XFA form.
-#define FPDF_UNSP_DOC_XFAFORM 1
-// Unsupported portable collection.
-#define FPDF_UNSP_DOC_PORTABLECOLLECTION 2
-// Unsupported attachment.
-#define FPDF_UNSP_DOC_ATTACHMENT 3
-// Unsupported security.
-#define FPDF_UNSP_DOC_SECURITY 4
-// Unsupported shared review.
-#define FPDF_UNSP_DOC_SHAREDREVIEW 5
-// Unsupported shared form, acrobat.
-#define FPDF_UNSP_DOC_SHAREDFORM_ACROBAT 6
-// Unsupported shared form, filesystem.
-#define FPDF_UNSP_DOC_SHAREDFORM_FILESYSTEM 7
-// Unsupported shared form, email.
-#define FPDF_UNSP_DOC_SHAREDFORM_EMAIL 8
-// Unsupported 3D annotation.
-#define FPDF_UNSP_ANNOT_3DANNOT 11
-// Unsupported movie annotation.
-#define FPDF_UNSP_ANNOT_MOVIE 12
-// Unsupported sound annotation.
-#define FPDF_UNSP_ANNOT_SOUND 13
-// Unsupported screen media annotation.
-#define FPDF_UNSP_ANNOT_SCREEN_MEDIA 14
-// Unsupported screen rich media annotation.
-#define FPDF_UNSP_ANNOT_SCREEN_RICHMEDIA 15
-// Unsupported attachment annotation.
-#define FPDF_UNSP_ANNOT_ATTACHMENT 16
-// Unsupported signature annotation.
-#define FPDF_UNSP_ANNOT_SIG 17
-
-// Interface for unsupported feature notifications.
-typedef struct _UNSUPPORT_INFO {
-  // Version number of the interface. Must be 1.
-  int version;
-
-  // Unsupported object notification function.
-  // Interface Version: 1
-  // Implementation Required: Yes
-  //
-  //   pThis - pointer to the interface structure.
-  //   nType - the type of unsupported object. One of the |FPDF_UNSP_*| entries.
-  void (*FSDK_UnSupport_Handler)(struct _UNSUPPORT_INFO* pThis, int nType);
-} UNSUPPORT_INFO;
-
-// Setup an unsupported object handler.
-//
-//   unsp_info - Pointer to an UNSUPPORT_INFO structure.
-//
-// Returns TRUE on success.
-FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
-FSDK_SetUnSpObjProcessHandler(UNSUPPORT_INFO* unsp_info);
-
-// Set replacement function for calls to time().
-//
-// This API is intended to be used only for testing, thus may cause PDFium to
-// behave poorly in production environments.
-//
-//   func - Function pointer to alternate implementation of time(), or
-//          NULL to restore to actual time() call itself.
-FPDF_EXPORT void FPDF_CALLCONV FSDK_SetTimeFunction(time_t (*func)());
-
-// Set replacement function for calls to localtime().
-//
-// This API is intended to be used only for testing, thus may cause PDFium to
-// behave poorly in production environments.
-//
-//   func - Function pointer to alternate implementation of localtime(), or
-//          NULL to restore to actual localtime() call itself.
-FPDF_EXPORT void FPDF_CALLCONV
-FSDK_SetLocaltimeFunction(struct tm* (*func)(const time_t*));
-
-// Unknown page mode.
-#define PAGEMODE_UNKNOWN -1
-// Document outline, and thumbnails hidden.
-#define PAGEMODE_USENONE 0
-// Document outline visible.
-#define PAGEMODE_USEOUTLINES 1
-// Thumbnail images visible.
-#define PAGEMODE_USETHUMBS 2
-// Full-screen mode, no menu bar, window controls, or other decorations visible.
-#define PAGEMODE_FULLSCREEN 3
-// Optional content group panel visible.
-#define PAGEMODE_USEOC 4
-// Attachments panel visible.
-#define PAGEMODE_USEATTACHMENTS 5
-
-// Get the document's PageMode.
-//
-//   doc - Handle to document.
-//
-// Returns one of the |PAGEMODE_*| flags defined above.
-//
-// The page mode defines how the document should be initially displayed.
-FPDF_EXPORT int FPDF_CALLCONV FPDFDoc_GetPageMode(FPDF_DOCUMENT document);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_EXT_H_

-// 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_FLATTEN_H_
-#define PUBLIC_FPDF_FLATTEN_H_
-
-// NOLINTNEXTLINE(build/include)
-#include "fpdfview.h"
-
-// Flatten operation failed.
-#define FLATTEN_FAIL 0
-// Flatten operation succeed.
-#define FLATTEN_SUCCESS 1
-// Nothing to be flattened.
-#define FLATTEN_NOTHINGTODO 2
-
-// Flatten for normal display.
-#define FLAT_NORMALDISPLAY 0
-// Flatten for print.
-#define FLAT_PRINT 1
-
-#ifdef __cplusplus
-extern "C" {
-#endif  // __cplusplus
-
-// Flatten annotations and form fields into the page contents.
-//
-//   page  - handle to the page.
-//   nFlag - One of the |FLAT_*| values denoting the page usage.
-//
-// Returns one of the |FLATTEN_*| values.
-//
-// Currently, all failures return |FLATTEN_FAIL| with no indication of the
-// cause.
-FPDF_EXPORT int FPDF_CALLCONV FPDFPage_Flatten(FPDF_PAGE page, int nFlag);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif  // __cplusplus
-
-#endif  // PUBLIC_FPDF_FLATTEN_H_