#include "fpdfview.h"

#include <iostream>

#include <string>

#include <string.h>

// #include "opencv2/opencv.hpp"

const char* icudt64_dat ="/data2/jesse/work/pdfium/repo/icudtl.dat2";

int main(int argc, char* argv[]) {

    // FPDF_InitLibrary();

    const char* fonts[] = {

        "../fonts/",

        NULL

    };

    FPDF_LIBRARY_CONFIG config;

    config.m_pUserFontPaths = fonts;

    config.version = ;

    config.m_pIsolate = NULL;

    config.m_v8EmbedderSlot = ;

    FPDF_InitLibraryWithConfig(&config);

    char* path = "../sample/test.pdf";

    if (argc > ) {

        path = argv[];

    }

    FPDF_DOCUMENT doc = FPDF_LoadDocument(path, );

    if (doc) {

        int page_count = FPDF_GetPageCount(doc);

        std::cout << "page count " << page_count << std::endl;

        for (int p = ; p < page_count; p++) {

            FPDF_PAGE page = FPDF_LoadPage(doc, p);

            if (page) {

                // 物理尺寸 每英寸72点

                double pwidth = FPDF_GetPageWidth(page);

                double pheight = FPDF_GetPageHeight(page);

                // 150ppi 下的像素尺寸

                int width = (int)(pwidth)* / ;

                int height = (int)(pheight)* / ;

                std::cout << "\t" << p << " (" << width << "," << height << ")" << std::endl;

                // BGRx/BGRA 4通道

                FPDF_BITMAP bmp = FPDFBitmap_Create(width, height, );

                // BGR 3通道

                //  FPDF_BITMAP bmp = FPDFBitmap_CreateEx(width, height, FPDFBitmap_BGR,NULL,0);

                uint8_t* ptr = (uint8_t*)FPDFBitmap_GetBuffer(bmp);

                //设置画板白色背景

                memset(ptr,,width*height*);

                FPDF_RenderPageBitmap(bmp, page, , , width, height, , );

                std::string name = "page" + std::to_string(p) + ".ppm";

                FILE* fp = fopen(name.c_str(), "wb");

                fprintf(fp, "P6\n%d %d\n255\n", width, height);

                uint8_t* dst = (uint8_t*)malloc(width * height * );

                uint8_t* dptr = dst;

                for (int y = ; y < height; y++) {

                    for (int x = ; x < width; x++) {// BGR->RGB

                        *dst++ = (ptr[]);// * ptr[3] + 255 * (255 - ptr[3])) / 255;

                        *dst++ = (ptr[]);// * ptr[3] + 255 * (255 - ptr[3])) / 255;

                        *dst++ = (ptr[]);// * ptr[3] + 255 * (255 - ptr[3])) / 255;

                        ptr += ;

                    }

                }

                fwrite(dptr, width * , height, fp);

                fclose(fp);

                free(dptr);

                FPDFBitmap_Destroy(bmp);

                FPDF_ClosePage(page);

            }

        }

        FPDF_CloseDocument(doc);

    }

    FPDF_DestroyLibrary();

    return ;

}