main.c

/*
LICENSE - Public Domain (www.unlicense.org)

This is free and unencumbered software released into the public domain.
Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
software, either in source code form or as a compiled binary, for any purpose,
commercial or non-commercial, and by any means.
In jurisdictions that recognize copyright laws, the author or authors of this
software dedicate any and all copyright interest in the software to the public
domain. We make this dedication for the benefit of the public at large and to
the detriment of our heirs and successors. We intend this dedication to be an
overt act of relinquishment in perpetuity of all present and future rights to
this software under copyright law.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/


// System includes
#include <stdio.h>
//#include <assert.h>
#include <stdlib.h>
#include <string.h>

// CUDA runtime
//#include <cuda_runtime.h>

#include "seam_carver.h"

//#define STBI_ONLY_BMP
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image_write.h"


int main(int argc, char **argv) {
    
    unsigned char* imgv;
    long seams_to_remove;
    char *check;
    int w, h, ncomp;
    seam_carver_mode mode = SEAM_CARVER_STANDARD_MODE;
    int success;
    
    if(argc < 3){
        printf("usage: %s namefile seams_to_remove [options]\nvalid options:\n-u\tupdate costs instead of recomputing them\n-a\tapproximate computation\n", argv[0]);
        return 1;
    }
    
    seams_to_remove = strtol(argv[2], &check, 10);  //10 specifies base-10
    if (check == argv[2]){   //if no characters were converted pointers are equal
        printf("ERROR: can't convert string to number, exiting.\n");
        return 1;
    }
    
    imgv = stbi_load(argv[1], &w, &h, &ncomp, 0);
    if(imgv == NULL){
        printf("ERROR: can't load image \"%s\" (maybe the file does not exist?), exiting.\n", argv[1]);
        return 1;
    }
    if(ncomp != 3){
        printf("ERROR: image does not have 3 components (RGB), exiting.\n");
        return 1;
    }
    
    if(seams_to_remove < 0 || seams_to_remove >= w){
        printf("ERROR: number of seams to remove is invalid, exiting.\n");
        return 1;
    }
    
    if(argc >= 4){
        if(strcmp(argv[3],"-u") == 0){
            mode = SEAM_CARVER_UPDATE_MODE;
            printf("update mode selected.\n");
        }
        else if(strcmp(argv[3],"-a") == 0){
            mode = SEAM_CARVER_APPROX_MODE;
            printf("approximation mode selected.\n");
        }
        else{    
            printf("an invalid option was specified and will be ignored. Valid options are: -u, -a.\n");
        }
    }
    
    printf("image loaded. Resizing...\n");
    seam_carver sc;
    seam_carver_init(&sc, mode, imgv, w, h);
    seam_carver_resize(&sc, (int)seams_to_remove);
    printf("image resized. Saving new image...\n");
   
    success = stbi_write_bmp("img2.bmp", sc.current_w, sc.h, 3, sc.output);
    printf("success : %d \n", success);
    
    seam_carver_destroy(&sc);
    
    return 0;
}