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 #include <OpenGLESDispatch/GLESv3Dispatch.h>
19
20 #include <dlfcn.h>
21 #include <stdio.h>
22
23 #define DEFAULT_GLESv2_LIB "libGLESv2_swiftshader.so"
24
25 GLESv3Dispatch s_gles3;
26
27 #define LOOKUP_SYMBOL(return_type, function_name, signature, callargs) \
28 s_gles3.function_name = (function_name##_t)dlsym(handle, #function_name); \
29 if ((!s_gles3.function_name) && s_egl.eglGetProcAddress) \
30 s_gles3.function_name = (function_name##_t)s_egl.eglGetProcAddress(#function_name);
31
gles3_dispatch_init()32 bool gles3_dispatch_init() {
33 void* handle = dlopen(DEFAULT_GLESv2_LIB, RTLD_NOW);
34 if (!handle) {
35 printf("Failed to open %s\n", dlerror());
36 return false;
37 }
38
39 LIST_GLES3_FUNCTIONS(LOOKUP_SYMBOL, LOOKUP_SYMBOL)
40
41 return true;
42 }
43