/src/TileSet.cpp

  1/*
  2Copyright 2011 Clint Bellanger
  3
  4This file is part of FLARE.
  5
  6FLARE is free software: you can redistribute it and/or modify it under the terms
  7of the GNU General Public License as published by the Free Software Foundation,
  8either version 3 of the License, or (at your option) any later version.
  9
 10FLARE is distributed in the hope that it will be useful, but WITHOUT ANY
 11WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 12PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 13
 14You should have received a copy of the GNU General Public License along with
 15FLARE.  If not, see http://www.gnu.org/licenses/
 16*/
 17
 18/**
 19 * class TileSet
 20 *
 21 * TileSet storage and file loading
 22 */
 23 
 24#include "TileSet.h"
 25#include "UtilsParsing.h"
 26#include "SharedResources.h"
 27#include "FileParser.h"
 28
 29#include <cstdio>
 30
 31using namespace std;
 32
 33TileSet::TileSet() {
 34	alpha_background = false;
 35	sprites = NULL;
 36	for (int i=0; i<256; i++) {
 37		tiles[i].src.x = 0;
 38		tiles[i].src.y = 0;
 39		tiles[i].src.w = 0;
 40		tiles[i].src.h = 0;
 41		tiles[i].offset.x = 0;
 42		tiles[i].offset.y = 0;
 43	}
 44}
 45
 46void TileSet::loadGraphics(const std::string& filename) {
 47	if (sprites) SDL_FreeSurface(sprites);
 48	
 49	sprites = IMG_Load((mods->locate("images/tilesets/" + filename)).c_str());
 50	if (!sprites) {
 51		fprintf(stderr, "Couldn't load image: %s\n", IMG_GetError());
 52		SDL_Quit();
 53	}
 54	
 55	// only set a color key if the tile set doesn't have an alpha channel
 56	if (!alpha_background) {
 57		SDL_SetColorKey( sprites, SDL_SRCCOLORKEY, SDL_MapRGB(sprites->format, 255, 0, 255) ); 
 58	}
 59	
 60	// optimize
 61	SDL_Surface *cleanup = sprites;
 62	sprites = SDL_DisplayFormatAlpha(sprites);
 63	SDL_FreeSurface(cleanup);	
 64}
 65
 66void TileSet::load(const std::string& filename) {
 67	if (current_map == filename) return;
 68	
 69	alpha_background = false;
 70	
 71	FileParser infile;
 72	unsigned short index;
 73	string img;
 74
 75	if (infile.open(mods->locate("tilesetdefs/" + filename))) {
 76		while (infile.next()) {
 77			if (infile.key == "tile") {
 78
 79				infile.val = infile.val + ',';
 80				index = eatFirstInt(infile.val, ',');
 81				tiles[index].src.x = eatFirstInt(infile.val, ',');
 82				tiles[index].src.y = eatFirstInt(infile.val, ',');
 83				tiles[index].src.w = eatFirstInt(infile.val, ',');
 84				tiles[index].src.h = eatFirstInt(infile.val, ',');
 85				tiles[index].offset.x = eatFirstInt(infile.val, ',');
 86				tiles[index].offset.y = eatFirstInt(infile.val, ',');
 87				
 88			}
 89			else if (infile.key == "img") {
 90				img = infile.val;
 91			}
 92			else if (infile.key == "alpha_background") {
 93				if (infile.val == "1") alpha_background = true;
 94			}
 95		
 96		}
 97		infile.close();
 98		loadGraphics(img);
 99	}
100
101	current_map = filename;
102}
103
104TileSet::~TileSet() {
105	SDL_FreeSurface(sprites);
106}