Extensions.h revision 85ef80d8902afe8d26cb75fa7837fd9e6d019620 
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#ifndef ANDROID_HWUI_EXTENSIONS_H
18#define ANDROID_HWUI_EXTENSIONS_H
19
20#include <utils/SortedVector.h>
21#include <utils/String8.h>
22
23#include <GLES2/gl2.h>
24#include <GLES2/gl2ext.h>
25
26#include "Debug.h"
27
28namespace android {
29namespace uirenderer {
30
31///////////////////////////////////////////////////////////////////////////////
32// Defines
33///////////////////////////////////////////////////////////////////////////////
34
35// Debug
36#if DEBUG_EXTENSIONS
37    #define EXT_LOGD(...) ALOGD(__VA_ARGS__)
38#else
39    #define EXT_LOGD(...)
40#endif
41
42///////////////////////////////////////////////////////////////////////////////
43// Classes
44///////////////////////////////////////////////////////////////////////////////
45
46class Extensions {
47public:
48    Extensions() {
49        const char* buffer = (const char*) glGetString(GL_EXTENSIONS);
50        const char* current = buffer;
51        const char* head = current;
52        EXT_LOGD("Available GL extensions:");
53        do {
54            head = strchr(current, ' ');
55            String8 s(current, head ? head - current : strlen(current));
56            if (s.length()) {
57                mExtensionList.add(s);
58                EXT_LOGD("  %s", s.string());
59            }
60            current = head + 1;
61        } while (head);
62
63        mHasNPot = hasExtension("GL_OES_texture_npot");
64        mHasFramebufferFetch = hasExtension("GL_NV_shader_framebuffer_fetch");
65        mHasDiscardFramebuffer = hasExtension("GL_EXT_discard_framebuffer");
66        mHasDebugMarker = hasExtension("GL_EXT_debug_marker");
67        mHasDebugLabel = hasExtension("GL_EXT_debug_label");
68        mHasTiledRendering = hasExtension("GL_QCOM_tiled_rendering");
69
70        mExtensions = strdup(buffer);
71    }
72
73    ~Extensions() {
74        free(mExtensions);
75    }
76
77    inline bool hasNPot() const { return mHasNPot; }
78    inline bool hasFramebufferFetch() const { return mHasFramebufferFetch; }
79    inline bool hasDiscardFramebuffer() const { return mHasDiscardFramebuffer; }
80    inline bool hasDebugMarker() const { return mHasDebugMarker; }
81    inline bool hasDebugLabel() const { return mHasDebugLabel; }
82    inline bool hasTiledRendering() const { return mHasTiledRendering; }
83
84    bool hasExtension(const char* extension) const {
85        const String8 s(extension);
86        return mExtensionList.indexOf(s) >= 0;
87    }
88
89    void dump() {
90        ALOGD("Supported extensions:\n%s", mExtensions);
91    }
92
93private:
94    SortedVector<String8> mExtensionList;
95
96    char* mExtensions;
97
98    bool mHasNPot;
99    bool mHasFramebufferFetch;
100    bool mHasDiscardFramebuffer;
101    bool mHasDebugMarker;
102    bool mHasDebugLabel;
103    bool mHasTiledRendering;
104}; // class Extensions
105
106}; // namespace uirenderer
107}; // namespace android
108
109#endif // ANDROID_HWUI_EXTENSIONS_H
110