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#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <SDL2/SDL.h>
#include "loader.h"
#include "main.h"
SDL_Texture *tilemap_tileset = NULL, *tilemap_wang_tileset = NULL, *tilemap_tilemap = NULL;
#define PACKED __attribute__((__packed__))
struct PACKED sets {
uint32_t tilesets_count;
uint32_t wang_count;
};
struct PACKED map {
uint32_t width;
uint32_t height;
uint32_t layers;
uint8_t tiles[];
};
void init_tilemap(void) {
tilemap_tileset = SDL_CreateTexture(renderer, SDL_PIXELTYPE_UNKNOWN, SDL_TEXTUREACCESS_TARGET, 128, 128);
tilemap_wang_tileset = SDL_CreateTexture(renderer, SDL_PIXELTYPE_UNKNOWN, SDL_TEXTUREACCESS_TARGET, 128, 128);
SDL_SetTextureBlendMode(tilemap_wang_tileset, SDL_BLENDMODE_BLEND);
}
void free_tilemap(void) {
SDL_DestroyTexture(tilemap_tileset), tilemap_tileset = NULL;
SDL_DestroyTexture(tilemap_wang_tileset), tilemap_wang_tileset = NULL;
SDL_DestroyTexture(tilemap_tilemap), tilemap_tilemap = NULL;
}
int load_tilemap(void const *data, size_t size) {
struct sets const *const sets = data;
data = sets + 1;
size -= sizeof (struct sets);
char const *str = data;
int y = 0;
SDL_SetRenderTarget(renderer, tilemap_tileset);
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
SDL_RenderClear(renderer);
for (uint32_t count = sets->tilesets_count; count > 0; count--) {
int height = *(uint32_t *) str;
str += sizeof (uint32_t);
size_t len = strnlen(str, size);
if (len == size) {
return 1;
}
void *tex = res_get_texture(str).data;
//printf("%u %u\n", y, height);
SDL_RenderCopy(renderer, tex, &(SDL_Rect) {0, 0, 128, height}, &(SDL_Rect) {0, y, 128, height});
//printf("%s %u\n", str, tex);
y += height;
str += len + 1;
size -= len + 4 + 1;
}
SDL_SetRenderTarget(renderer, tilemap_wang_tileset);
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
SDL_RenderClear(renderer);
if (sets->tilesets_count) {
int height = *(uint32_t *) str;
str += sizeof (uint32_t);
size_t len = strnlen(str, size);
if (len == size) {
return 1;
}
void *tex = res_get_texture(str).data;
//printf("%u %u\n", y, height);
SDL_RenderCopy(renderer, tex, &(SDL_Rect) {0, 0, 128, height}, &(SDL_Rect) {0, 0, 128, height});
//printf("%s %u\n", str, tex);
str += len + 1;
size -= len + 4 + 1;
}
struct map const *const map = (void *) str;
if (map->width * map->height * map->layers != size - sizeof (struct map)) {
return 1;
}
SDL_Texture *tilemap = SDL_CreateTexture(renderer, SDL_PIXELTYPE_UNKNOWN, SDL_TEXTUREACCESS_TARGET, map->width * 8, map->height * 8);
SDL_SetTextureBlendMode(tilemap, SDL_BLENDMODE_BLEND);
SDL_SetRenderTarget(renderer, tilemap);
for (int y = 0; y < map->height; y++) {
for (int x = 0; x < map->width; x++) {
unsigned tile = map->tiles[x + map->width * y];
int tileX = tile & 0x0f;
int tileY = tile >> 4;
SDL_RenderCopy(renderer, tilemap_tileset, &(SDL_Rect) {tileX * 8, tileY * 8, 8, 8}, &(SDL_Rect) {x * 8, y * 8, 8, 8});
}
}
for (int tile = 0xf0; tile < 0x100; tile++) {
for (int y = 0; y < map->height - 1; y++) {
for (int x = 0; x < map->width - 1; x++) {
int tl = map->tiles[x + map->width * y] == tile;
int tr = map->tiles[x + 1 + map->width * y] == tile;
int bl = map->tiles[x + map->width * (y + 1)] == tile;
int br = map->tiles[x + 1 + map->width * (y + 1)] == tile;
//int tileX = tl << 3 | tr << 2 | bl << 1 | br << 0;
int tileX = tl << 0 | tr << 1 | bl << 2 | br << 3;
int tileY = tile & 0x0f;
SDL_RenderCopy(renderer, tilemap_wang_tileset, &(SDL_Rect) {tileX * 8, tileY * 8, 8, 8}, &(SDL_Rect) {x * 8 + 4, y * 8 + 4, 8, 8});
}
}
}
SDL_DestroyTexture(tilemap_tilemap), tilemap_tilemap = tilemap;
SDL_SetRenderTarget(renderer, NULL);
return 0;
}
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