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 <stdint.h>
21
22#include <EGL/egl.h>
23
24// ----------------------------------------------------------------------------
25namespace android {
26// ----------------------------------------------------------------------------
27
28struct egl_connection_t;
29
30class Loader {
31    typedef __eglMustCastToProperFunctionPointerType (* getProcAddressType)(const char*);
32
33    enum {
34        EGL         = 0x01,
35        GLESv1_CM   = 0x02,
36        GLESv2      = 0x04
37    };
38    struct driver_t {
39        explicit driver_t(void* gles);
40        ~driver_t();
41        // returns -errno
42        int set(void* hnd, int32_t api);
43        void* dso[3];
44    };
45
46    getProcAddressType getProcAddress;
47
48public:
49    static Loader& getInstance();
50    ~Loader();
51
52    void* open(egl_connection_t* cnx);
53    void close(void* driver);
54
55private:
56    Loader();
57    void *load_driver(const char* kind, egl_connection_t* cnx, uint32_t mask);
58
59    static __attribute__((noinline))
60    void init_api(void* dso,
61            char const * const * api,
62            __eglMustCastToProperFunctionPointerType* curr,
63            getProcAddressType getProcAddress);
64};
65
66// ----------------------------------------------------------------------------
67}; // namespace android
68// ----------------------------------------------------------------------------
69
70#endif /* ANDROID_EGL_LOADER_H */
71