1 /*
2  * Copyright 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 import java.io.BufferedReader;
18 import java.io.File;
19 import java.io.FileOutputStream;
20 import java.io.FileReader;
21 import java.io.IOException;
22 import java.io.PrintStream;
23 
24 public class GenerateEGL {
25 
copy(String filename, PrintStream out)26     private static void copy(String filename, PrintStream out) throws IOException {
27         BufferedReader br = new BufferedReader(new FileReader(filename));
28         String s;
29         while ((s = br.readLine()) != null) {
30             out.println(s);
31         }
32     }
33 
emit(EGLCodeEmitter emitter, BufferedReader specReader, PrintStream glStream, PrintStream cStream)34     private static void emit(EGLCodeEmitter emitter,
35                              BufferedReader specReader,
36                              PrintStream glStream,
37                              PrintStream cStream) throws Exception {
38         String s = null;
39         while ((s = specReader.readLine()) != null) {
40             if (s.trim().startsWith("//")) {
41                 continue;
42             }
43 
44             CFunc cfunc = CFunc.parseCFunc(s);
45 
46             String fname = cfunc.getName();
47             String stubRoot = "stubs/egl/" + fname;
48             String javaPath = stubRoot + ".java";
49             File f = new File(javaPath);
50             if (f.exists()) {
51                 System.out.println("Special-casing function " + fname);
52                 copy(javaPath, glStream);
53                 copy(stubRoot + ".cpp", cStream);
54 
55                 // Register native function names
56                 // This should be improved to require fewer discrete files
57                 String filename = stubRoot + ".nativeReg";
58                 BufferedReader br =
59                     new BufferedReader(new FileReader(filename));
60                 String nfunc;
61                 while ((nfunc = br.readLine()) != null) {
62                     emitter.addNativeRegistration(nfunc);
63                 }
64             } else {
65                 emitter.emitCode(cfunc, s);
66             }
67         }
68     }
69 
main(String[] args)70     public static void main(String[] args) throws Exception {
71         int aidx = 0;
72         while ((aidx < args.length) && (args[aidx].charAt(0) == '-')) {
73             switch (args[aidx].charAt(1)) {
74             default:
75                 System.err.println("Unknown flag: " + args[aidx]);
76                 System.exit(1);
77             }
78 
79             aidx++;
80         }
81 
82         BufferedReader checksReader =
83             new BufferedReader(new FileReader("specs/egl/checks.spec"));
84         ParameterChecker checker = new ParameterChecker(checksReader);
85 
86 
87         for(String suffix: new String[] {"EGL14", "EGL15", "EGLExt"}) {
88             BufferedReader specReader = new BufferedReader(new FileReader(
89                     "specs/egl/" + suffix + ".spec"));
90             String egljFilename = "android/opengl/" + suffix + ".java";
91             String eglcFilename = "android_opengl_" + suffix + ".cpp";
92             PrintStream egljStream =
93                 new PrintStream(new FileOutputStream("out/" + egljFilename));
94             PrintStream eglcStream =
95                 new PrintStream(new FileOutputStream("out/" + eglcFilename));
96             copy("stubs/egl/" + suffix + "Header.java-if", egljStream);
97             copy("stubs/egl/" + suffix + "cHeader.cpp", eglcStream);
98             EGLCodeEmitter emitter = new EGLCodeEmitter(
99                     "android/opengl/" + suffix,
100                     checker, egljStream, eglcStream);
101             emit(emitter, specReader, egljStream, eglcStream);
102             emitter.emitNativeRegistration(
103                     "register_android_opengl_jni_" + suffix);
104             egljStream.println("}");
105             egljStream.close();
106             eglcStream.close();
107         }
108     }
109 }
110