1/*
2 * Copyright (c) 2009-2010 jMonkeyEngine
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 *   notice, this list of conditions and the following disclaimer.
11 *
12 * * Redistributions in binary form must reproduce the above copyright
13 *   notice, this list of conditions and the following disclaimer in the
14 *   documentation and/or other materials provided with the distribution.
15 *
16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
17 *   may be used to endorse or promote products derived from this software
18 *   without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33package com.jme3.font.plugins;
34
35import com.jme3.asset.*;
36import com.jme3.font.BitmapCharacter;
37import com.jme3.font.BitmapCharacterSet;
38import com.jme3.font.BitmapFont;
39import com.jme3.material.Material;
40import com.jme3.material.MaterialDef;
41import com.jme3.material.RenderState.BlendMode;
42import com.jme3.texture.Texture;
43import java.io.BufferedReader;
44import java.io.IOException;
45import java.io.InputStream;
46import java.io.InputStreamReader;
47
48public class BitmapFontLoader implements AssetLoader {
49
50    private BitmapFont load(AssetManager assetManager, String folder, InputStream in) throws IOException{
51        MaterialDef spriteMat =
52                (MaterialDef) assetManager.loadAsset(new AssetKey("Common/MatDefs/Misc/Unshaded.j3md"));
53
54        BitmapCharacterSet charSet = new BitmapCharacterSet();
55        Material[] matPages = null;
56        BitmapFont font = new BitmapFont();
57
58        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
59        String regex = "[\\s=]+";
60
61        font.setCharSet(charSet);
62        while (reader.ready()){
63            String line = reader.readLine();
64            String[] tokens = line.split(regex);
65            if (tokens[0].equals("info")){
66                // Get rendered size
67                for (int i = 1; i < tokens.length; i++){
68                    if (tokens[i].equals("size")){
69                        charSet.setRenderedSize(Integer.parseInt(tokens[i + 1]));
70                    }
71                }
72            }else if (tokens[0].equals("common")){
73                // Fill out BitmapCharacterSet fields
74                for (int i = 1; i < tokens.length; i++){
75                    String token = tokens[i];
76                    if (token.equals("lineHeight")){
77                        charSet.setLineHeight(Integer.parseInt(tokens[i + 1]));
78                    }else if (token.equals("base")){
79                        charSet.setBase(Integer.parseInt(tokens[i + 1]));
80                    }else if (token.equals("scaleW")){
81                        charSet.setWidth(Integer.parseInt(tokens[i + 1]));
82                    }else if (token.equals("scaleH")){
83                        charSet.setHeight(Integer.parseInt(tokens[i + 1]));
84                    }else if (token.equals("pages")){
85                        // number of texture pages
86                        matPages = new Material[Integer.parseInt(tokens[i + 1])];
87                        font.setPages(matPages);
88                    }
89                }
90            }else if (tokens[0].equals("page")){
91                int index = -1;
92                Texture tex = null;
93
94                for (int i = 1; i < tokens.length; i++){
95                    String token = tokens[i];
96                    if (token.equals("id")){
97                        index = Integer.parseInt(tokens[i + 1]);
98                    }else if (token.equals("file")){
99                        String file = tokens[i + 1];
100                        if (file.startsWith("\"")){
101                            file = file.substring(1, file.length()-1);
102                        }
103                        TextureKey key = new TextureKey(folder + file, true);
104                        key.setGenerateMips(false);
105                        tex = assetManager.loadTexture(key);
106                        tex.setMagFilter(Texture.MagFilter.Bilinear);
107                        tex.setMinFilter(Texture.MinFilter.BilinearNoMipMaps);
108                    }
109                }
110                // set page
111                if (index >= 0 && tex != null){
112                    Material mat = new Material(spriteMat);
113                    mat.setTexture("ColorMap", tex);
114                    mat.setBoolean("VertexColor", true);
115                    mat.getAdditionalRenderState().setBlendMode(BlendMode.Alpha);
116                    matPages[index] = mat;
117                }
118            }else if (tokens[0].equals("char")){
119                // New BitmapCharacter
120                BitmapCharacter ch = null;
121                for (int i = 1; i < tokens.length; i++){
122                    String token = tokens[i];
123                    if (token.equals("id")){
124                        int index = Integer.parseInt(tokens[i + 1]);
125                        ch = new BitmapCharacter();
126                        charSet.addCharacter(index, ch);
127                    }else if (token.equals("x")){
128                        ch.setX(Integer.parseInt(tokens[i + 1]));
129                    }else if (token.equals("y")){
130                        ch.setY(Integer.parseInt(tokens[i + 1]));
131                    }else if (token.equals("width")){
132                        ch.setWidth(Integer.parseInt(tokens[i + 1]));
133                    }else if (token.equals("height")){
134                        ch.setHeight(Integer.parseInt(tokens[i + 1]));
135                    }else if (token.equals("xoffset")){
136                        ch.setXOffset(Integer.parseInt(tokens[i + 1]));
137                    }else if (token.equals("yoffset")){
138                        ch.setYOffset(Integer.parseInt(tokens[i + 1]));
139                    }else if (token.equals("xadvance")){
140                        ch.setXAdvance(Integer.parseInt(tokens[i + 1]));
141                    } else if (token.equals("page")) {
142                        ch.setPage(Integer.parseInt(tokens[i + 1]));
143                    }
144                }
145            }else if (tokens[0].equals("kerning")){
146                // Build kerning list
147                int index = 0;
148                int second = 0;
149                int amount = 0;
150
151                for (int i = 1; i < tokens.length; i++){
152                    if (tokens[i].equals("first")){
153                        index = Integer.parseInt(tokens[i + 1]);
154                    }else if (tokens[i].equals("second")){
155                        second = Integer.parseInt(tokens[i + 1]);
156                    }else if (tokens[i].equals("amount")){
157                        amount = Integer.parseInt(tokens[i + 1]);
158                    }
159                }
160
161                BitmapCharacter ch = charSet.getCharacter(index);
162                ch.addKerning(second, amount);
163            }
164        }
165        return font;
166    }
167
168    public Object load(AssetInfo info) throws IOException {
169        InputStream in = null;
170        try {
171            in = info.openStream();
172            BitmapFont font = load(info.getManager(), info.getKey().getFolder(), in);
173            return font;
174        } finally {
175            if (in != null){
176                in.close();
177            }
178        }
179    }
180
181}
182