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-rw-r--r--src/chunkedtiledmap.c263
1 files changed, 0 insertions, 263 deletions
diff --git a/src/chunkedtiledmap.c b/src/chunkedtiledmap.c
deleted file mode 100644
index a3019af..0000000
--- a/src/chunkedtiledmap.c
+++ /dev/null
@@ -1,263 +0,0 @@
-#include <raylib.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-
-#include "chunkedtiledmap.h"
-
-const int endian = 1;
-#define is_bigendian() ( (*(char*)&endian) == 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);
-}
-
-
-//! 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;
-}
-
-int writeb(char * in, size_t noBytes, FILE * file) {
- if (!is_bigendian()) {
- int tmp;
- // reverse byte order
- for(int i = 0; i < noBytes/2; i++) {
- tmp = in[i];
- in[i] = in[noBytes-i-1];
- in[noBytes-i-1] = tmp;
- }
-
- }
-
- return fwrite(in, (size_t)1, (size_t) noBytes, file);
-}
-
-void buildChunkTree(ChunkedTiledMap *tiledMap) {
- // initialise chunk tree
- tiledMap->chunkTree = NULL;
-
- size_t chunkSizeBytes = tiledMap->chunkWidth * tiledMap->chunkHeight;
- // calculate how much space there is until the end of the file
- // TODO save the number of chunks total to avoid having to jump around to find referenceso
- // or just keep reading chunks until eof or other descriptor
- long chunksStart = ftell(tiledMap->file);
- fseek(tiledMap->file, 0, SEEK_END);
- long totalChunksSize = ftell(tiledMap->file) - chunksStart;
-
- fseek(tiledMap->file, chunksStart, SEEK_SET);
-
- for (int n = 0; n < totalChunksSize; n += chunkSizeBytes + 8) {
- int x, y;
- readb((char *)&x, 4, tiledMap->file);
- readb((char *)&y, 4, tiledMap->file);
- long pointer = ftell(tiledMap->file);
-
- kdtree_insert(&tiledMap->chunkTree, x, y, (char *) pointer);
- fseek(tiledMap->file, chunkSizeBytes, SEEK_CUR);
- }
-}
-
-ChunkedTiledMap openTiledMap(char * filename) {
- ChunkedTiledMap tiledMap;
-
- if (!(tiledMap.file = fopen(filename, "r+b"))) {
- fprintf(stderr, "Failed to load %s\n", filename);
- }
-
- FILE * file = tiledMap.file;
-
- // skip header
- fseek(file, 10, SEEK_CUR);
- // 4 bytes for int width
- readb((char *)&tiledMap.chunkWidth, 4, file);
- // 4 bytes for int height
- readb((char *)&tiledMap.chunkHeight, 4, 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);
-
- tiledMap.tileCount = tiledMap.atlasSize[0]*tiledMap.atlasSize[1] + 1;
-
- buildChunkTree(&tiledMap);
- return tiledMap;
-}
-
-//! write a chunk to the file
-char* writeChunk(ChunkedTiledMap *tiledMap, int x, int y, char * chunk) {
- size_t chunkSizeBytes = tiledMap->chunkWidth * tiledMap->chunkHeight;
-
-
- long pos = (long) kdtree_search(tiledMap->chunkTree, x, y);
-
- fseek(tiledMap->file, pos, SEEK_SET);
- fwrite(chunk, 1, chunkSizeBytes, tiledMap->file);
- return chunk;
-}
-
-char* loadChunk(ChunkedTiledMap tiledMap, int x, int y) {
- // TODO add caching for this
- size_t chunkSizeBytes = tiledMap.chunkWidth * tiledMap.chunkHeight;
- char * chunk = malloc(chunkSizeBytes);
-
- long pos = (long) kdtree_search(tiledMap.chunkTree, x, y);
- // if this chunk is not indexed, return NULL
- if (pos == 0)
- return NULL;
-
- fseek(tiledMap.file, pos, SEEK_SET);
- fread(chunk, 1, chunkSizeBytes, tiledMap.file);
- return chunk;
-}
-
-char * appendChunk(ChunkedTiledMap *tiledMap, int x, int y, char * chunk) {
- // TODO does this actually need tiledMap as a pointer
- size_t chunkSizeBytes = tiledMap->chunkWidth * tiledMap->chunkHeight;
-
- fseek(tiledMap->file, 0, SEEK_END);
-
- // calculate position before writing
- long pos = ftell(tiledMap->file) + 8;
- kdtree_insert(&tiledMap->chunkTree, x, y, (char *)pos);
-
- int chunkx, chunky;
- writeb((char *) &x, 4, tiledMap->file);
- writeb((char *) &y, 4, tiledMap->file);
- fwrite(chunk, 1, chunkSizeBytes, tiledMap->file);
-
- return chunk;
-}
-
-char * appendEmptyChunk(ChunkedTiledMap * tiledMap, int x, int y) {
- char * chunk = calloc(tiledMap->chunkWidth*tiledMap->chunkHeight, 1);
- return appendChunk(tiledMap, x, y, chunk);
-}
-
-char getChunkedTile(ChunkedTiledMap tiledMap, int x, int y) {
- // TODO put this calculation in function
- int inChunkX = x % tiledMap.chunkWidth;
- int inChunkY = y % tiledMap.chunkHeight;
- int chunkX = (x - inChunkX) / tiledMap.chunkWidth;
- int chunkY = (y - inChunkY) / tiledMap.chunkHeight;
-
- char * chunk = loadChunk(tiledMap, chunkX, chunkY);
- if (chunk == NULL)
- return 0;
-
- char v = chunk[inChunkY * tiledMap.chunkWidth + inChunkX];
- return v;
-}
-
-char setChunkedTile(ChunkedTiledMap * tiledMap, int x, int y, char value) {
- int inChunkX = x % tiledMap->chunkWidth;
- int inChunkY = y % tiledMap->chunkHeight;
- int chunkX = (x - inChunkX) / tiledMap->chunkWidth;
- int chunkY = (y - inChunkY) / tiledMap->chunkHeight;
-
- char * chunk = loadChunk(*tiledMap, chunkX, chunkY);
- if (chunk == NULL)
- chunk = appendEmptyChunk(tiledMap, chunkX, chunkY);
-
- chunk[inChunkY * tiledMap->chunkWidth + inChunkX] = value;
-
- writeChunk(tiledMap, chunkX, chunkY, chunk);
-
- return value;
-}
-
-
-void writeTiledMapHeader(ChunkedTiledMap tiledMap) {
- FILE * file = tiledMap.file;
- size_t atlasSizeBytes = tiledMap.atlasSize[0]*tiledMap.tileSize*tiledMap.atlasSize[1]*tiledMap.tileSize*4;
-
- // write header information from the start of the file
- fseek(file, 0, SEEK_SET);
- fwrite("TILEFILEv3", 10, 1, file);
-
- writeb((char *) &tiledMap.chunkWidth, 4, file);
- writeb((char *) &tiledMap.chunkHeight, 4, file);
-
- writeb((char *) &tiledMap.tileSize, 4, file);
- writeb((char *) &tiledMap.atlasSize[0], 4, file);
- writeb((char *) &tiledMap.atlasSize[1], 4, file);
-
- fwrite(tiledMap.atlasData, 1, atlasSizeBytes, file);
- // since chunks are already directly written here, do not write anything else
- // TODO when caching, commit everything left in cache here
-}
-
-ChunkedTiledMap openNewTiledMap(char * filename, Image atlas, int tileSize, int chunkWidth, int chunkHeight, int width, int height) {
- ChunkedTiledMap tiledMap;
- tiledMap.chunkWidth = chunkWidth;
- tiledMap.chunkHeight = chunkHeight;
-
- tiledMap.tileSize = tileSize;
-
- tiledMap.atlasSize[0] = atlas.width / tileSize;
- tiledMap.atlasSize[1] = atlas.height / tileSize;
-
- tiledMap.atlasData = LoadImageColors(atlas);
- tiledMap.tileCount = tiledMap.atlasSize[0]*tiledMap.atlasSize[1] + 1;
-
- tiledMap.chunkTree = NULL;
-
- if (!(tiledMap.file = fopen(filename, "wb"))) {
- fprintf(stderr, "Failed to load %s\n", filename);
- }
-
- writeTiledMapHeader(tiledMap);
- for (int x = 0; x < width; x++) {
- for (int y = 0; y < height; y++) {
- char * chunk = calloc(chunkWidth*chunkHeight, 1);
- appendChunk(&tiledMap, x, y, chunk);
- }
- }
-
- // reopen the file in read+write mode
- fclose(tiledMap.file);
-
- if (!(tiledMap.file = fopen(filename, "r+b"))) {
- fprintf(stderr, "Failed to load %s\n", filename);
- }
-
- return tiledMap;
-}
-
-void closeTiledMap(ChunkedTiledMap tiledMap) {
- kdtree_free(&tiledMap.chunkTree);
- UnloadImageColors(tiledMap.atlasData);
- fclose(tiledMap.file);
-}
-
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-01 09:32:47 +0000