1 /*
2 * Copyright (C) 2018 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 #include <OpenGLESDispatch/EGLDispatch.h>
18
19 #include <dlfcn.h>
20 #include <stdio.h>
21
22 EGLDispatch s_egl;
23
24 #define DEFAULT_EGL_LIB "libEGL_swiftshader.so"
25
26 #define EGL_LOAD_FIELD(return_type, function_name, signature, callargs) \
27 s_egl.function_name = (function_name##_t)dlsym(handle, #function_name);
28
29 #define EGL_LOAD_FIELD_WITH_EGL(return_type, function_name, signature, callargs) \
30 if ((!s_egl.function_name) && s_egl.eglGetProcAddress) \
31 s_egl.function_name = (function_name##_t)s_egl.eglGetProcAddress(#function_name);
32
33 #define EGL_LOAD_OPTIONAL_FIELD(return_type, function_name, signature, callargs) \
34 if (s_egl.eglGetProcAddress) \
35 s_egl.function_name = (function_name##_t)s_egl.eglGetProcAddress(#function_name); \
36 if (!s_egl.function_name || !s_egl.eglGetProcAddress) \
37 EGL_LOAD_FIELD(return_type, function_name, signature, callargs)
38
egl_dispatch_init()39 bool egl_dispatch_init() {
40 void* handle = dlopen(DEFAULT_EGL_LIB, RTLD_NOW);
41 if (!handle) {
42 printf("Failed to open %s\n", dlerror());
43 return false;
44 }
45
46 LIST_EGL_FUNCTIONS(EGL_LOAD_FIELD)
47 LIST_EGL_FUNCTIONS(EGL_LOAD_FIELD_WITH_EGL)
48 LIST_EGL_EXTENSIONS_FUNCTIONS(EGL_LOAD_OPTIONAL_FIELD)
49
50 return true;
51 }
52