// DevIL sample.

#include <IL/ilu.h>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#undef USE_WCHAR_T

int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        printf("Usage:\n\thoge.exe IN.png\n");
        return 0;
    }

    char *filename = argv[1];

    ILuint img;
    int width, height;

    // DevIL init
    ilInit();
    iluInit();

    // generate image ID
    ilGenImages(1, &img);

    ilBindImage(img);

#ifdef USE_WCHAR_T
    // char to wchar_t
    size_t newsize = strlen(filename) + 1;
    wchar_t *wcfilename = new wchar_t[newsize];
    size_t convertedChars = 0;
    mbstowcs_s(&convertedChars, wcfilename, newsize, filename, _TRUNCATE);
#endif

    ILboolean fg;

    if (1)
    {
        // not use ilLoadImage()

        ILubyte *lump;
        ILuint size;
        FILE *fp;

        fp = fopen(filename, "rb");
        fseek(fp, 0, SEEK_END);
        size = ftell(fp);

        lump = (ILubyte *)malloc(size);
        fseek(fp, 0, SEEK_SET);
        fread(lump, 1, size, fp);
        fclose(fp);

        fg = ilLoadL(IL_PNG, lump, size);

        free(lump);
    }
    else
    {
        // use ilLoadImage()

        fg = ilLoadImage(filename);
    }

    if (fg)
    {
        // load success
        printf("Load : %s\n", filename);

        width = ilGetInteger(IL_IMAGE_WIDTH);
        height = ilGetInteger(IL_IMAGE_HEIGHT);
        printf("image size : %d x %d\n", width, height);

        if (ilGetInteger(IL_IMAGE_ORIGIN) != IL_ORIGIN_LOWER_LEFT)
        {
            iluFlipImage();
        }
    }
    else
    {
        // load failure
        ILenum err = ilGetError();
        std::cerr << iluErrorString(err) << std::endl;
    }

    ilDeleteImages(1, &img);

#ifdef USE_WCHAR_T
    delete wcfilename;
#endif

    return 0;
}