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
17import java.io.BufferedReader;
18import java.io.File;
19import java.io.FileOutputStream;
20import java.io.FileReader;
21import java.io.IOException;
22import java.io.PrintStream;
23
24public class GenerateGLES {
25
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
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
46            String fname = cfunc.getName();
47            String stubRoot = "stubs/gles11/" + 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
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/gles11/checks.spec"));
84        ParameterChecker checker = new ParameterChecker(checksReader);
85
86        // Generate files
87        for(String suffix: new String[] {"GLES10", "GLES10Ext",
88                "GLES11", "GLES11Ext", "GLES20"})
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            gl11Stream.println("/*");
100            gl11cStream.println("/*");
101            copy("stubs/gles11/" + suffix + "Header.java-if", gl11Stream);
102            copy("stubs/gles11/" + suffix + "cHeader.cpp", gl11cStream);
103            GLESCodeEmitter emitter = new GLESCodeEmitter(
104                    "android/opengl/" + suffix,
105                    checker, gl11Stream, gl11cStream);
106            emit(emitter, spec11Reader, gl11Stream, gl11cStream);
107            emitter.emitNativeRegistration("register_android_opengl_jni_"
108                    + suffix);
109            gl11Stream.println("}");
110            gl11Stream.close();
111            gl11cStream.close();
112        }
113    }
114}
115