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#include <raylib.h>
#include <stdlib.h>
#include <stdio.h>
#include "tiledfile.h"
const int i = 1;
#define is_bigendian() ( (*(char*)&i) == 0 )
void textureFromPixels(Texture2D *texOut, Color *pixels, int width, int height) {
Image checkedIm = {
.data = pixels,
.width = width,
.height = height,
.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8,
.mipmaps = 1
};
*texOut = LoadTextureFromImage(checkedIm);
UnloadImage(checkedIm);
}
void renderTilemapTexture(Texture2D *texOut, TiledMap tiledMap) {
Color *pixels = (Color*) malloc(tiledMap.width * tiledMap.height * sizeof(Color));
for (int i = 0; i < tiledMap.width*tiledMap.height; i++) {
pixels[i] = (Color){ tiledMap.tilelayout[i], 0, 0, 0 };
}
textureFromPixels(texOut, pixels, tiledMap.width, tiledMap.height);
}
//! read rgba image from file
void readrgba(Texture2D *loc, int width, int height, FILE *file) {
Color *pixels = malloc(width*height*4);
fread(pixels, (size_t) width*height*4, (size_t) 1, file);
textureFromPixels(loc, pixels, width, height);
}
//! read a big endian bytes from file
int readb(char * out, size_t noBytes, FILE * file) {
if (!fread(out, (size_t)1, (size_t) noBytes, file))
return 1;
if (is_bigendian())
return 0;
int tmp;
// reverse byte order
for(int i = 0; i < noBytes/2; i++) {
tmp = out[i];
out[i] = out[noBytes-i-1];
out[noBytes-i-1] = tmp;
}
return 0;
}
char getTiledMapTile(TiledMap tiledMap, int pos[2]) {
return tiledMap.tilelayout[pos[1]*tiledMap.width + pos[0]];
}
void setTiledMapTile(TiledMap tiledMap, int pos[2], char tile) {
tiledMap.tilelayout[pos[1]*tiledMap.width + pos[0]] = tile;
}
//! load tilemap data from file
TiledMap loadTiledMap(char * filename) {
TiledMap tiledMap;
FILE * file;
if (!(file = fopen(filename, "rb"))) {
fprintf(stderr, "Failed to load %s\n", filename);
return tiledMap;
}
// skip header
fseek(file, 10, SEEK_CUR);
// 4 bytes for int width
readb((char *)&tiledMap.width, 4, file);
// 4 bytes for int height
readb((char *)&tiledMap.height, 4, file);
size_t layoutSize = tiledMap.width*tiledMap.height;
tiledMap.tilelayout = malloc(layoutSize);
fread(tiledMap.tilelayout, layoutSize, 1, file);
// read the pixel size of each tile
readb((char *)&tiledMap.tileSize, 4, file);
// read the atlas size
readb((char *)&tiledMap.atlasSize[0], 4, file);
readb((char *)&tiledMap.atlasSize[1], 4, file);
// read the atlas itself
size_t atlasSizeBytes = tiledMap.atlasSize[0]*tiledMap.tileSize*tiledMap.atlasSize[1]*tiledMap.tileSize*4;
tiledMap.atlasData = malloc(atlasSizeBytes);
fread(tiledMap.atlasData, atlasSizeBytes, (size_t) 1, file);
fclose(file);
return tiledMap;
}
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