Quickstart

These sample programs illustrate how to access and manipulate pixel data in the bitmap:

Example 1

Brightness adjustment:

#include <libwinbmp.c>
#include <stdio.h>
#define STEP 64

int main(void)
{
    bmp_t *bmp;
    bmp = bmp_load("/home/jakub/bmp-parser/lena.bmp");
    unsigned int row_size = bmp->info.width * 3;
    unsigned int x;
    unsigned int y;
    int d;

    for (y = 0; y < bmp->info.height; y++) {
        for (x = 0; x < row_size; x++) {
            d = (int)bmp->data[y][x] + STEP;
            if (d > 255) {
                d = 255;
            } else if (d < 0) {
                d = 0;
            }
            bmp->data[y][x] = (unsigned char)d;
        }
    }

    bmp_write(bmp,"/home/jakub/bmp-parser/frob.bmp");
    bmp_destroy(bmp);
    return 0;
}

Example 2

Averaging two images:

#include <libwinbmp.c>
#include <stdio.h>


int main(void)
{
    bmp_t *bmp;
    bmp_t *other;
    bmp = bmp_load("/home/jakub/bmp-parser/lena.bmp");
    other = bmp_load("/home/jakub/bmp-parser/beach.bmp");

    bmp_average(bmp, other);

    bmp_write(bmp,"/home/jakub/bmp-parser/frob.bmp");
    bmp_destroy(bmp);
    bmp_destroy(other);
    return 0;
}