Loader.h revision ada798b7ca7cabc255aa159964b64975e7fdb2df 
1/*
2 ** Copyright 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#ifndef ANDROID_EGL_LOADER_H
18#define ANDROID_EGL_LOADER_H
19
20#include <ctype.h>
21#include <string.h>
22#include <errno.h>
23
24#include <utils/Errors.h>
25#include <utils/Singleton.h>
26#include <utils/String8.h>
27
28#include <EGL/egl.h>
29
30// ----------------------------------------------------------------------------
31namespace android {
32// ----------------------------------------------------------------------------
33
34struct egl_connection_t;
35
36class Loader : public Singleton<Loader>
37{
38    friend class Singleton<Loader>;
39
40    typedef __eglMustCastToProperFunctionPointerType (*getProcAddressType)(
41            const char*);
42
43    enum {
44        EGL         = 0x01,
45        GLESv1_CM   = 0x02,
46        GLESv2      = 0x04
47    };
48    struct driver_t {
49        driver_t(void* gles);
50        ~driver_t();
51        status_t set(void* hnd, int32_t api);
52        void* dso[3];
53    };
54
55    String8 mDriverTag;
56    getProcAddressType getProcAddress;
57
58public:
59    ~Loader();
60
61    void* open(egl_connection_t* cnx);
62    status_t close(void* driver);
63
64private:
65    Loader();
66    void *load_driver(const char* kind, const char *tag, egl_connection_t* cnx, uint32_t mask);
67
68    static __attribute__((noinline))
69    void init_api(void* dso,
70            char const * const * api,
71            __eglMustCastToProperFunctionPointerType* curr,
72            getProcAddressType getProcAddress);
73};
74
75// ----------------------------------------------------------------------------
76}; // namespace android
77// ----------------------------------------------------------------------------
78
79#endif /* ANDROID_EGL_LOADER_H */
80