Loader.cpp revision 0ad71a97c6061e3b12d2308bd43e02dfeeb63db4
1/* 2 ** Copyright 2007, 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 <ctype.h> 18#include <stdlib.h> 19#include <stdio.h> 20#include <string.h> 21#include <errno.h> 22#include <dlfcn.h> 23#include <limits.h> 24 25#include <cutils/log.h> 26 27#include <EGL/egl.h> 28 29#include "hooks.h" 30#include "egl_impl.h" 31 32#include "Loader.h" 33#include "glesv2dbg.h" 34 35// ---------------------------------------------------------------------------- 36namespace android { 37// ---------------------------------------------------------------------------- 38 39 40/* 41 * EGL drivers are called 42 * 43 * /system/lib/egl/lib{[EGL|GLESv1_CM|GLESv2] | GLES}_$TAG.so 44 * 45 */ 46 47ANDROID_SINGLETON_STATIC_INSTANCE( Loader ) 48 49// ---------------------------------------------------------------------------- 50 51Loader::driver_t::driver_t(void* gles) 52{ 53 dso[0] = gles; 54 for (size_t i=1 ; i<NELEM(dso) ; i++) 55 dso[i] = 0; 56} 57 58Loader::driver_t::~driver_t() 59{ 60 for (size_t i=0 ; i<NELEM(dso) ; i++) { 61 if (dso[i]) { 62 dlclose(dso[i]); 63 dso[i] = 0; 64 } 65 } 66} 67 68status_t Loader::driver_t::set(void* hnd, int32_t api) 69{ 70 switch (api) { 71 case EGL: 72 dso[0] = hnd; 73 break; 74 case GLESv1_CM: 75 dso[1] = hnd; 76 break; 77 case GLESv2: 78 dso[2] = hnd; 79 break; 80 default: 81 return BAD_INDEX; 82 } 83 return NO_ERROR; 84} 85 86// ---------------------------------------------------------------------------- 87 88Loader::entry_t::entry_t(int dpy, int impl, const char* tag) 89 : dpy(dpy), impl(impl), tag(tag) { 90} 91 92// ---------------------------------------------------------------------------- 93 94Loader::Loader() 95{ 96 char line[256]; 97 char tag[256]; 98 FILE* cfg = fopen("/system/lib/egl/egl.cfg", "r"); 99 if (cfg == NULL) { 100 // default config 101 LOGD("egl.cfg not found, using default config"); 102 gConfig.add( entry_t(0, 0, "android") ); 103 } else { 104 while (fgets(line, 256, cfg)) { 105 int dpy; 106 int impl; 107 if (sscanf(line, "%u %u %s", &dpy, &impl, tag) == 3) { 108 //LOGD(">>> %u %u %s", dpy, impl, tag); 109 gConfig.add( entry_t(dpy, impl, tag) ); 110 } 111 } 112 fclose(cfg); 113 } 114} 115 116Loader::~Loader() 117{ 118 StopDebugServer(); 119} 120 121const char* Loader::getTag(int dpy, int impl) 122{ 123 const Vector<entry_t>& cfgs(gConfig); 124 const size_t c = cfgs.size(); 125 for (size_t i=0 ; i<c ; i++) { 126 if (dpy == cfgs[i].dpy) 127 if (impl == cfgs[i].impl) 128 return cfgs[i].tag.string(); 129 } 130 return 0; 131} 132 133void* Loader::open(EGLNativeDisplayType display, int impl, egl_connection_t* cnx) 134{ 135 /* 136 * TODO: if we don't find display/0, then use 0/0 137 * (0/0 should always work) 138 */ 139 140 void* dso; 141 int index = int(display); 142 driver_t* hnd = 0; 143 144 char const* tag = getTag(index, impl); 145 if (tag) { 146 dso = load_driver("GLES", tag, cnx, EGL | GLESv1_CM | GLESv2); 147 if (dso) { 148 hnd = new driver_t(dso); 149 } else { 150 // Always load EGL first 151 dso = load_driver("EGL", tag, cnx, EGL); 152 if (dso) { 153 hnd = new driver_t(dso); 154 155 // TODO: make this more automated 156 hnd->set( load_driver("GLESv1_CM", tag, cnx, GLESv1_CM), GLESv1_CM ); 157 158 hnd->set( load_driver("GLESv2", tag, cnx, GLESv2), GLESv2 ); 159 } 160 } 161 } 162 163 LOG_FATAL_IF(!index && !impl && !hnd, 164 "couldn't find the default OpenGL ES implementation " 165 "for default display"); 166 167 return (void*)hnd; 168} 169 170status_t Loader::close(void* driver) 171{ 172 driver_t* hnd = (driver_t*)driver; 173 delete hnd; 174 return NO_ERROR; 175} 176 177void Loader::init_api(void* dso, 178 char const * const * api, 179 __eglMustCastToProperFunctionPointerType* curr, 180 getProcAddressType getProcAddress) 181{ 182 const size_t SIZE = 256; 183 char scrap[SIZE]; 184 while (*api) { 185 char const * name = *api; 186 __eglMustCastToProperFunctionPointerType f = 187 (__eglMustCastToProperFunctionPointerType)dlsym(dso, name); 188 if (f == NULL) { 189 // couldn't find the entry-point, use eglGetProcAddress() 190 f = getProcAddress(name); 191 } 192 if (f == NULL) { 193 // Try without the OES postfix 194 ssize_t index = ssize_t(strlen(name)) - 3; 195 if ((index>0 && (index<SIZE-1)) && (!strcmp(name+index, "OES"))) { 196 strncpy(scrap, name, index); 197 scrap[index] = 0; 198 f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap); 199 //LOGD_IF(f, "found <%s> instead", scrap); 200 } 201 } 202 if (f == NULL) { 203 // Try with the OES postfix 204 ssize_t index = ssize_t(strlen(name)) - 3; 205 if (index>0 && strcmp(name+index, "OES")) { 206 snprintf(scrap, SIZE, "%sOES", name); 207 f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap); 208 //LOGD_IF(f, "found <%s> instead", scrap); 209 } 210 } 211 if (f == NULL) { 212 //LOGD("%s", name); 213 f = (__eglMustCastToProperFunctionPointerType)gl_unimplemented; 214 } 215 *curr++ = f; 216 api++; 217 } 218} 219 220void *Loader::load_driver(const char* kind, const char *tag, 221 egl_connection_t* cnx, uint32_t mask) 222{ 223 char driver_absolute_path[PATH_MAX]; 224 const char* const search1 = "/vendor/lib/egl/lib%s_%s.so"; 225 const char* const search2 = "/system/lib/egl/lib%s_%s.so"; 226 227 snprintf(driver_absolute_path, PATH_MAX, search1, kind, tag); 228 if (access(driver_absolute_path, R_OK)) { 229 snprintf(driver_absolute_path, PATH_MAX, search2, kind, tag); 230 if (access(driver_absolute_path, R_OK)) { 231 // this happens often, we don't want to log an error 232 return 0; 233 } 234 } 235 236 void* dso = dlopen(driver_absolute_path, RTLD_NOW | RTLD_LOCAL); 237 if (dso == 0) { 238 const char* err = dlerror(); 239 LOGE("load_driver(%s): %s", driver_absolute_path, err?err:"unknown"); 240 return 0; 241 } 242 243 LOGD("loaded %s", driver_absolute_path); 244 245 if (mask & EGL) { 246 getProcAddress = (getProcAddressType)dlsym(dso, "eglGetProcAddress"); 247 248 LOGE_IF(!getProcAddress, 249 "can't find eglGetProcAddress() in %s", driver_absolute_path); 250 251 egl_t* egl = &cnx->egl; 252 __eglMustCastToProperFunctionPointerType* curr = 253 (__eglMustCastToProperFunctionPointerType*)egl; 254 char const * const * api = egl_names; 255 while (*api) { 256 char const * name = *api; 257 __eglMustCastToProperFunctionPointerType f = 258 (__eglMustCastToProperFunctionPointerType)dlsym(dso, name); 259 if (f == NULL) { 260 // couldn't find the entry-point, use eglGetProcAddress() 261 f = getProcAddress(name); 262 if (f == NULL) { 263 f = (__eglMustCastToProperFunctionPointerType)0; 264 } 265 } 266 *curr++ = f; 267 api++; 268 } 269 } 270 271 if (mask & GLESv1_CM) { 272 init_api(dso, gl_names, 273 (__eglMustCastToProperFunctionPointerType*) 274 &cnx->hooks[GLESv1_INDEX]->gl, 275 getProcAddress); 276 } 277 278 if (mask & GLESv2) { 279 init_api(dso, gl_names, 280 (__eglMustCastToProperFunctionPointerType*) 281 &cnx->hooks[GLESv2_INDEX]->gl, 282 getProcAddress); 283 } 284 285 return dso; 286} 287 288// ---------------------------------------------------------------------------- 289}; // namespace android 290// ---------------------------------------------------------------------------- 291