bitmap_printer.c

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#include <stdio.h>
#include <stdlib.h>
#include "bitmap.h"


int main(int argc, char **argv) {
    if (argc != 2) {
        fprintf(stderr, "Usage: bitmap_printer input_bmp\n");
        exit(1);
    }

    FILE *image = fopen(argv[1], "rb");
    if (image == NULL) {
        perror("fopen");
        exit(1);
    }

    // Read in bitmap file metadata
    int pixel_array_offset, width, height;
    read_bitmap_metadata(image, &pixel_array_offset, &width, &height);

    // Print out metadata.
    printf("Pixel array offset: %d\n", pixel_array_offset);
    printf("Width: %d\n", width);
    printf("Height: %d\n", width);

    // Read in the pixel data
    struct pixel **pixels = read_pixel_array(image, pixel_array_offset, width, height);

    // Print out some pixels from each of the image's corners.
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 5; j++) {
            print_pixel(pixels[i][j]);
            print_pixel(pixels[i][height - 1 - j]);
            print_pixel(pixels[width - 1 - i][j]);
            print_pixel(pixels[width - 1 - i][height - 1 - j]);
        }
    }

    // Clean up: you need to do this!


    return 0;
}