directional-texture.c

//
// Created by Natty on 02.08.20.
//

#include "directional-texture.h"

#include <SDL2/SDL_image.h>
#include <assert.h>

DirectionalTexture_t* dt_create(SDL_Renderer* renderer, unsigned int directions, const char* location) {
    assert(directions < 64);

    char* file = (char*) malloc((size_t) strlen(location) + (size_t) strlen("/0000.png") + 1);

    if (file == NULL) {
        fprintf(stderr, "Memory allocation failed!");
        exit(EXIT_FAILURE);
    }

    DirectionalTexture_t* tex = (DirectionalTexture_t*) malloc(sizeof(DirectionalTexture_t) + sizeof(SDL_Texture*) * directions);

    if (tex == NULL) {
        fprintf(stderr, "Memory allocation for a directional texture failed!");
        exit(EXIT_FAILURE);
    }

    for (unsigned int i = 0; i < directions; i++) {
        sprintf(file, "%s/%04u.png", location, i + 1);
        printf("Loading texture %s...\n", file);
        SDL_Texture* texture = IMG_LoadTexture(renderer, file);

        if (texture == NULL) {
            fprintf(stderr, "Failed to load texture %s!\n", file);
            free(file);
            exit(EXIT_FAILURE);
        }

        tex->textures[i] = texture;
    }

    free(file);

    tex->directions = directions;
    return tex;
}

void dt_free(DirectionalTexture_t* texture) {
    if (texture == NULL)
        return;

    for (unsigned int i = 0; i < texture->directions; i++)
        SDL_DestroyTexture(texture->textures[i]);

    free(texture);
}