Extensions.h revision 51769a68a5cb34e9564740c6a854fcb93018789d 
1/*
2 * Copyright (C) 2010 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#define LOG_TAG "OpenGLRenderer"
18
19#ifndef ANDROID_UI_EXTENSIONS_H
20#define ANDROID_UI_EXTENSIONS_H
21
22#include <utils/SortedVector.h>
23#include <utils/String8.h>
24
25#include <GLES2/gl2.h>
26#include <GLES2/gl2ext.h>
27
28namespace android {
29namespace uirenderer {
30
31class Extensions {
32public:
33    Extensions() {
34        const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
35        const char* current = buffer;
36        const char* head = current;
37        do {
38            head = strchr(current, ' ');
39            String8 s(current, head ? head - current : strlen(current));
40            if (s.length()) {
41                mExtensionList.add(s);
42            }
43            current = head + 1;
44        } while (head);
45
46        mHasNPot = hasExtension("GL_OES_texture_npot");
47        mHasDrawPath = hasExtension("GL_NV_draw_path");
48        mHasCoverageSample = hasExtension("GL_NV_coverage_sample");
49
50        mExtensions = buffer;
51    }
52
53    inline bool hasNPot() const { return mHasNPot; }
54    inline bool hasDrawPath() const { return mHasDrawPath; }
55    inline bool hasCoverageSample() const { return mHasCoverageSample; }
56
57    bool hasExtension(const char* extension) const {
58        const String8 s(extension);
59        return mExtensionList.indexOf(s) >= 0;
60    }
61
62    void dump() {
63        LOGD("Supported extensions:\n%s", mExtensions);
64    }
65
66private:
67    SortedVector<String8> mExtensionList;
68
69    const char* mExtensions;
70
71    bool mHasNPot;
72    bool mHasDrawPath;
73    bool mHasCoverageSample;
74}; // class Extensions
75
76}; // namespace uirenderer
77}; // namespace android
78
79#endif // ANDROID_UI_EXTENSIONS_H
80