use FPDF_LoadXFA :Failed to create annotation by pdfium-v8-win-x64

[Caesar454905970]

`
#include
#include
#include
#include <fpdfview.h>
#include <fpdf_save.h>
#include <fpdf_edit.h>
#include <fpdf_formfill.h>
#include <fpdf_annot.h>
/**** 自定义文件写入器结构体 ***/
struct MyFileWriter : public FPDF_FILEWRITE {
FILE file;
};

/**** 加载字体数据函数 ****/
std::vector<uint8_t> LoadFontData(const char* font_path) {
    std::ifstream font_file(font_path, std::ios::binary);
    if (!font_file) {
        throw std::runtime_error("Failed to open font file.");
    }
    return std::vector<uint8_t>((std::istreambuf_iterator<char>(font_file)),
                                std::istreambuf_iterator<char>());
}

int main() {
    /**** 定义输出文件名 ****/
    const char *output_filename = "output.pdf";  // 输出 PDF 文件

    /**** 初始化 PDFium 库 ****/
    FPDF_InitLibrary();

    /**** 创建一个新的 PDF 文档 ****/
    FPDF_DOCUMENT doc = FPDF_CreateNewDocument();
    if (!doc) {
        std::cerr << "Failed to create new document." << std::endl;
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 向文档添加一个新页面（A4 大小：595 x 842 点） ****/
    FPDF_PAGE page = FPDFPage_New(doc, 0, 595, 842); // A4 大小

    /**** 设置要显示的文本 ****/
    const wchar_t *text = L"pdfium";

    /**** 加载自定义中文字体 ****/
    std::vector<uint8_t> font_data;
    try {
        font_data = LoadFontData("./ttfont/AlimamaFangYuan.ttf");
    } catch (const std::exception& e) {
        std::cerr << e.what() << std::endl;
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    FPDF_FONT font = FPDFText_LoadFont(doc, font_data.data(), font_data.size(), FPDF_FONT_TRUETYPE, true);
    if (!font) {
        std::cerr << "Failed to load font." << std::endl;
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 创建文本对象 ****/
    FPDF_PAGEOBJECT text_object = FPDFPageObj_CreateTextObj(doc, font, 24);
    if (!text_object) {
        std::cerr << "Failed to create text object." << std::endl;
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 设置文本内容（UTF-16LE 编码） ****/
    FPDF_WIDESTRING wide_text = reinterpret_cast<const FPDF_WIDESTRING>(text);
    FPDFText_SetText(text_object, wide_text);

    /**** 设置文本对象的位置 ****/
    FPDFPageObj_Transform(text_object, 1, 0, 0, 1, 100, 700);

    /**** 将文本对象添加到页面 ****/
    FPDFPage_InsertObject(page, text_object);


    /**** 生成页面内容 ****/
    FPDFPage_GenerateContent(page);

    /**** 初始化表单填充环境 ****/
    IPDF_JSPLATFORM platform_callbacks = {0};
    platform_callbacks.version = 3;

    FPDF_FORMFILLINFO form_callbacks = {0};
    form_callbacks.version = 2;
    form_callbacks.m_pJsPlatform = &platform_callbacks;

    FPDF_FORMHANDLE form_handle = FPDFDOC_InitFormFillEnvironment(doc, &form_callbacks);
    if (!form_handle) {
        std::cerr << "Failed to initialize form fill environment." << std::endl;
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

 /**** 加载 XFA 表单 ****/
    FPDF_LoadXFA(doc);

    /**** 创建文本输入框（表单字段） ****/
    FPDF_ANNOTATION annot = FPDFPage_CreateAnnot(page, FPDF_ANNOT_WIDGET);
    if (!annot) {
        std::cerr << "Failed to create annotation." << std::endl;
        FPDFDOC_ExitFormFillEnvironment(form_handle);
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 设置表单字段的位置和大小 ****/
    FS_RECTF rect = {100, 650, 300, 670}; // 左下角 (100, 650), 右上角 (300, 670)
    if (!FPDFAnnot_SetRect(annot, &rect)) {
        std::cerr << "Failed to set annotation rectangle." << std::endl;
        FPDFDOC_ExitFormFillEnvironment(form_handle);
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 设置表单字段的默认值 ****/
    if (!FPDFAnnot_SetStringValue(annot, "V", reinterpret_cast<FPDF_WIDESTRING>(L"ABC"))) {
        std::cerr << "Failed to set form field value." << std::endl;
        FPDFDOC_ExitFormFillEnvironment(form_handle);
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    /**** 使用 FPDF_SaveAsCopy 将文档保存到文件 ****/
    FILE* file = fopen(output_filename, "wb");
    if (!file) {
        std::cerr << "Failed to open file: " << output_filename << std::endl;
        FPDFDOC_ExitFormFillEnvironment(form_handle);
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    MyFileWriter fileWriter;
    fileWriter.version = 1;
    fileWriter.file = file;
    fileWriter.WriteBlock = [](FPDF_FILEWRITE* pThis, const void* data, unsigned long size) -> int {
        MyFileWriter* writer = static_cast<MyFileWriter*>(pThis);
        return fwrite(data, 1, size, writer->file) == size ? 1 : 0;
    };

    if (!FPDF_SaveAsCopy(doc, &fileWriter, FPDF_NO_INCREMENTAL)) {
        std::cerr << "Failed to save document: " << output_filename << std::endl;
        fclose(file);
        FPDFDOC_ExitFormFillEnvironment(form_handle);
        FPDF_ClosePage(page);
        FPDF_CloseDocument(doc);
        FPDF_DestroyLibrary();
        return 1;
    }

    fclose(file);
    /**** 清理资源 ****/



    FPDFDOC_ExitFormFillEnvironment(form_handle);
    FPDF_CloseDocument(doc);

    FPDF_ClosePage(page);
    FPDF_DestroyLibrary();
    /**** 成功消息 ****/
    std::cout << "PDF successfully created." << std::endl;
    return 0;
}

`
pdf -pdfium-test.zip

[bblanchon]

@Caesar454905970, please address your questions to the PDFium group