#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include "image.h"
#include <stdlib.h>

int image_load(image_t *img, const char *filename) {
    int ch;
    img->data = stbi_load(filename, &img->width, &img->height, &ch, 3);
    return img->data != NULL;
}

int image_resize(image_t *src, image_t *dst, int new_w, int new_h) {
    dst->width = new_w;
    dst->height = new_h;
    dst->data = malloc(new_w * new_h * 3);
    if (!dst->data) return 0;

    for (int y = 0; y < new_h; y++) {
        for (int x = 0; x < new_w; x++) {
            int sx = x * src->width / new_w;
            int sy = y * src->height / new_h;
            for (int c = 0; c < 3; c++) {
                dst->data[(y*new_w + x)*3 + c] =
                    src->data[(sy*src->width + sx)*3 + c];
            }
        }
    }
    return 1;
}

void image_free(image_t *img) {
    if (img->data)
        stbi_image_free(img->data);
    img->data = NULL;
}

void image_free_raw(image_t *img) {
    if (img->data)
        free(img->data);
    img->data = NULL;
}