img2bin

main.cpp

#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <opencv2/opencv.hpp>

int main(int argc, const char * argv[])
{
    if (argc < 2) {
        fprintf(stderr, "Usage: img2bin image-file\n");
        exit(1);
    }
    cv::Mat img = cv::imread(argv[1]);
    if (img.type() != CV_8UC3) {
        fprintf(stderr, "Error: wrong image type\n");
        exit(1);
    }
    std::string filename(argv[1]);
    const size_t last_slash_idx = filename.find_last_of("\\/");
    if (std::string::npos != last_slash_idx)
    {
        filename.erase(0, last_slash_idx + 1);
    }
    const size_t period_idx = filename.rfind('.');
    if (std::string::npos != period_idx)
    {
        filename.erase(period_idx);
    }
    filename.append(".inc");
    FILE *fp = fopen(filename.c_str(), "w");
    for (int i = 0; i < img.rows; i++)
    {
        fprintf(fp, "dw");
        for(int j = 0; j < img.cols; j++)
        {
            cv::Vec3b bgrPixel = img.at<cv::Vec3b>(i, j);
            unsigned char r = bgrPixel.val[2];
            unsigned char g = bgrPixel.val[1];
            unsigned char b = bgrPixel.val[0];
            unsigned short word = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
            if (j == 0) {
                fprintf(fp, " %d", word);
            } else {
                fprintf(fp, ", %d", word);
            }
        }
        fprintf(fp, "\n");
    }
    fclose(fp);
    return 0;
}