| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #include "ClientAPIExts.h" |
| #include "ThreadInfo.h" |
| #include <GLES/gl.h> |
| #include <GLES/glext.h> |
| #include "eglContext.h" |
| |
| namespace ClientAPIExts |
| { |
| |
| // |
| // define function pointer type for each extention function |
| // typename has the form __egl_{funcname}_t |
| // |
| #define FUNC_TYPE(fname) __egl_ ## fname ## _t |
| // NOLINT: clang-tidy adds parentheses around 'params'. |
| #define API_ENTRY(fname,params,args) \ |
| typedef void (GL_APIENTRY *FUNC_TYPE(fname)) params; // NOLINT |
| |
| #define API_ENTRY_RET(rtype,fname,params,args) \ |
| typedef rtype (GL_APIENTRY *FUNC_TYPE(fname)) params; // NOLINT |
| |
| #include "ClientAPIExts.in" |
| #undef API_ENTRY |
| #undef API_ENTRY_RET |
| |
| ///// |
| // Define static table to store the function value for each |
| // client API. functions pointers will get initialized through |
| // ClientAPIExts::initClientFuncs function after each client API has been |
| // loaded. |
| ///// |
| #define API_ENTRY(fname,params,args) \ |
| FUNC_TYPE(fname) (fname); |
| |
| #define API_ENTRY_RET(rtype,fname,params,args) \ |
| API_ENTRY(fname,params,args) |
| |
| static struct _ext_table |
| { |
| #include "ClientAPIExts.in" |
| } s_client_extensions[2]; |
| |
| #undef API_ENTRY |
| #undef API_ENTRY_RET |
| |
| // |
| // This function initialized each entry in the s_client_extensions |
| // struct at the givven index using the givven client interface |
| // |
| void initClientFuncs(const EGLClient_glesInterface *iface, int idx) |
| { |
| #define API_ENTRY(fname,params,args) \ |
| s_client_extensions[idx].fname = \ |
| (FUNC_TYPE(fname))iface->getProcAddress(#fname); |
| |
| #define API_ENTRY_RET(rtype,fname,params,args) \ |
| API_ENTRY(fname,params,args) |
| |
| // |
| // reset all func pointers to NULL |
| // |
| memset(&s_client_extensions[idx], 0, sizeof(struct _ext_table)); |
| |
| // |
| // And now query the GLES library for each proc address |
| // |
| #include "ClientAPIExts.in" |
| #undef API_ENTRY |
| #undef API_ENTRY_RET |
| } |
| |
| // |
| // Define implementation for each extension function which checks |
| // the current context version and calls to the correct client API |
| // function. |
| // |
| // NOLINT: clang-tidy adds parentheses around 'args'. |
| #define API_ENTRY(fname,params,args) \ |
| static void _egl_ ## fname params \ |
| { \ |
| EGLThreadInfo* thread = getEGLThreadInfo(); \ |
| if (!thread->currentContext) { \ |
| return; \ |
| } \ |
| int clientMajorVersion = (int)thread->currentContext->majorVersion; \ |
| int idx = clientMajorVersion == 1 ? 0 : 1; \ |
| if (!s_client_extensions[idx].fname) { \ |
| return; \ |
| } \ |
| (*s_client_extensions[idx].fname) args; /* NOLINT */ \ |
| } |
| |
| #define API_ENTRY_RET(rtype,fname,params,args) \ |
| static rtype _egl_ ## fname params \ |
| { \ |
| EGLThreadInfo* thread = getEGLThreadInfo(); \ |
| if (!thread->currentContext) { \ |
| return (rtype)0; \ |
| } \ |
| int idx = (int)thread->currentContext->majorVersion - 1; \ |
| if (!s_client_extensions[idx].fname) { \ |
| return (rtype)0; \ |
| } \ |
| return (*s_client_extensions[idx].fname) args; /* NOLINT */ \ |
| } |
| |
| #include "ClientAPIExts.in" |
| #undef API_ENTRY |
| #undef API_ENTRY_RET |
| |
| // |
| // Define a table to map function names to the local _egl_ version of |
| // the extension function, to be used in eglGetProcAddress. |
| // |
| #define API_ENTRY(fname,params,args) \ |
| { #fname, (void*)_egl_ ## fname}, |
| #define API_ENTRY_RET(rtype,fname,params,args) \ |
| API_ENTRY(fname,params,args) |
| |
| static const struct _client_ext_funcs { |
| const char *fname; |
| void* proc; |
| } s_client_ext_funcs[] = { |
| #include "ClientAPIExts.in" |
| }; |
| static const int numExtFuncs = sizeof(s_client_ext_funcs) / |
| sizeof(s_client_ext_funcs[0]); |
| |
| #undef API_ENTRY |
| #undef API_ENTRY_RET |
| |
| // |
| // returns the __egl_ version of the givven extension function name. |
| // |
| void* getProcAddress(const char *fname) |
| { |
| for (int i=0; i<numExtFuncs; i++) { |
| if (!strcmp(fname, s_client_ext_funcs[i].fname)) { |
| return s_client_ext_funcs[i].proc; |
| } |
| } |
| return NULL; |
| } |
| |
| } // of namespace ClientAPIExts |