1 /*
2  * Copyright (C) 2009 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 GenerateGLES {
25 
copy(String filename, PrintStream out)26     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(GLESCodeEmitter emitter, BufferedReader specReader, PrintStream glStream, PrintStream cStream)34     private static void emit(GLESCodeEmitter 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             String fname = cfunc.getName();
46             String stubRoot = "stubs/gles11/" + fname;
47             String javaPath = stubRoot + ".java";
48             File f = new File(javaPath);
49             if (f.exists()) {
50                 System.out.println("Special-casing function " + fname);
51                 copy(javaPath, glStream);
52                 copy(stubRoot + ".cpp", cStream);
53 
54                 // Register native function names
55                 // This should be improved to require fewer discrete files
56                 String filename = stubRoot + ".nativeReg";
57                 BufferedReader br =
58                     new BufferedReader(new FileReader(filename));
59                 String nfunc;
60                 while ((nfunc = br.readLine()) != null) {
61                     emitter.addNativeRegistration(nfunc);
62                 }
63             } else {
64                 emitter.emitCode(cfunc, s);
65             }
66         }
67     }
68 
main(String[] args)69     public static void main(String[] args) throws Exception {
70         int aidx = 0;
71         while ((aidx < args.length) && (args[aidx].charAt(0) == '-')) {
72             switch (args[aidx].charAt(1)) {
73             default:
74                 System.err.println("Unknown flag: " + args[aidx]);
75                 System.exit(1);
76             }
77 
78             aidx++;
79         }
80 
81         BufferedReader checksReader =
82             new BufferedReader(new FileReader("specs/gles11/checks.spec"));
83         ParameterChecker checker = new ParameterChecker(checksReader);
84 
85         // Generate files
86         for(String suffix: new String[] {"GLES10", "GLES10Ext",
87                 "GLES11", "GLES11Ext", "GLES20",
88                 "GLES30", "GLES31", "GLES31Ext", "GLES32"})
89         {
90             BufferedReader spec11Reader =
91                 new BufferedReader(new FileReader("specs/gles11/"
92                         + suffix + ".spec"));
93             String gl11Filename = "android/opengl/" + suffix + ".java";
94             String gl11cFilename = "android_opengl_" + suffix + ".cpp";
95             PrintStream gl11Stream =
96                 new PrintStream(new FileOutputStream("out/" + gl11Filename));
97             PrintStream gl11cStream =
98                 new PrintStream(new FileOutputStream("out/" + gl11cFilename));
99             copy("stubs/gles11/" + suffix + "Header.java-if", gl11Stream);
100             copy("stubs/gles11/" + suffix + "cHeader.cpp", gl11cStream);
101             copy("stubs/gles11/common.cpp", gl11cStream);
102             GLESCodeEmitter emitter = new GLESCodeEmitter(
103                     "android/opengl/" + suffix,
104                     checker, gl11Stream, gl11cStream);
105             emit(emitter, spec11Reader, gl11Stream, gl11cStream);
106             emitter.emitNativeRegistration("register_android_opengl_jni_"
107                     + suffix);
108             gl11Stream.println("}");
109             gl11Stream.close();
110             gl11cStream.close();
111         }
112     }
113 }
114