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#include <stdio.h>
#include <errno.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include "map.h"
#define TILE_SIDE 8
SDL_Texture* map_texture = NULL;
void add_map_row(const char* string, struct map* map);
void load_map(const char* filename, struct map* map) {
if(map->contents != NULL || map->colliders != NULL) {
printf("Reallocating non empty map, exitting!\n");
exit(1);
}
map->collider_count = 0;
map->width = 0;
map->height = 0;
FILE* file = fopen(filename, "r");
if(file == NULL) {
const char* error;
switch(errno) {
default:
error = "Unknown Error";
}
printf("Failed to load map %s, error: %s, exitting!\n",filename, error);
exit(1);
}
map->height = 0;
char buffer[1024];
fgets(buffer, 1024, file);
buffer[1023] = '\0';
map->width = 1;
for (unsigned long i = 0; i < strlen(buffer); i++) {
if (buffer[i] == ',')
map->width++;
}
fseek(file, 0, SEEK_SET);
while(fgets(buffer, 1024, file)) {
//Add another row to the map
map->height++;
map->contents =
realloc(map->contents, map->width * map->height * sizeof(int));
add_map_row(buffer, map);
}
fclose(file);
}
void add_map_row(const char* line, struct map* map) {
int* row = &map->contents[map->width * (map->height - 1)];
int width = map->width;
for(int i = 0; i < width; i++) {
sscanf(line, "%d", &row[i]);
int length = 1;
int j = row[i];
//If the current tile isn't empty add a collider here
if(row[i] != -1) {
map->colliders =
realloc(map->colliders, ++map->collider_count * sizeof(SDL_Rect));
map->colliders[map->collider_count - 1] =
(SDL_Rect) {
.x = i * 26,
.y = (map->height - 1) * 20,
.w = 26,
.h = 20
};
}
if(j < 0) {
length++;
j = -j;
}
for(; j > 0; j /= 10, length++);
line += length;
}
}
void draw_map(struct demo* demo, struct map* map) {
for(int i = 0; i < map->height; i++)
for(int j = 0; j < map->width; j++) {
int tile =
map->contents[i * map->width + j];
if(tile == -1) {
continue;
}
SDL_Rect s = {
.x = (tile % 36) * TILE_SIDE,
.y = (tile / 36) * TILE_SIDE,
.w = TILE_SIDE,
.h = TILE_SIDE
};
SDL_Rect d = {
.x = j * 26,
.y = i * 20,
.w = 26,
.h = 20
};
demo_rendercopy(demo, map_texture, &s, &d);
}
}
void map_init(struct demo* demo) {
map_texture =
IMG_LoadTexture(demo->ren, "assets/Sprites/Tileset.png");
if(map_texture == NULL) {
printf("Failed to load map tileset, error: %s, exitting!\n",
SDL_GetError());
exit(1);
}
}
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