| /* |
| ** Copyright 2007, 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 <ctype.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <dlfcn.h> |
| #include <limits.h> |
| |
| #include <cutils/log.h> |
| |
| #include <EGL/egl.h> |
| |
| #include "hooks.h" |
| #include "egl_impl.h" |
| |
| #include "Loader.h" |
| |
| // ---------------------------------------------------------------------------- |
| namespace android { |
| // ---------------------------------------------------------------------------- |
| |
| |
| /* |
| * EGL drivers are called |
| * |
| * /system/lib/egl/lib{[EGL|GLESv1_CM|GLESv2] | GLES}_$TAG.so |
| * |
| */ |
| |
| ANDROID_SINGLETON_STATIC_INSTANCE( Loader ) |
| |
| // ---------------------------------------------------------------------------- |
| |
| Loader::driver_t::driver_t(void* gles) |
| { |
| dso[0] = gles; |
| for (size_t i=1 ; i<NELEM(dso) ; i++) |
| dso[i] = 0; |
| } |
| |
| Loader::driver_t::~driver_t() |
| { |
| for (size_t i=0 ; i<NELEM(dso) ; i++) { |
| if (dso[i]) { |
| dlclose(dso[i]); |
| dso[i] = 0; |
| } |
| } |
| } |
| |
| status_t Loader::driver_t::set(void* hnd, int32_t api) |
| { |
| switch (api) { |
| case EGL: |
| dso[0] = hnd; |
| break; |
| case GLESv1_CM: |
| dso[1] = hnd; |
| break; |
| case GLESv2: |
| dso[2] = hnd; |
| break; |
| default: |
| return BAD_INDEX; |
| } |
| return NO_ERROR; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| Loader::entry_t::entry_t(int dpy, int impl, const char* tag) |
| : dpy(dpy), impl(impl), tag(tag) { |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| Loader::Loader() |
| { |
| char line[256]; |
| char tag[256]; |
| FILE* cfg = fopen("/system/lib/egl/egl.cfg", "r"); |
| if (cfg == NULL) { |
| // default config |
| LOGD("egl.cfg not found, using default config"); |
| gConfig.add( entry_t(0, 0, "android") ); |
| } else { |
| while (fgets(line, 256, cfg)) { |
| int dpy; |
| int impl; |
| if (sscanf(line, "%u %u %s", &dpy, &impl, tag) == 3) { |
| //LOGD(">>> %u %u %s", dpy, impl, tag); |
| gConfig.add( entry_t(dpy, impl, tag) ); |
| } |
| } |
| fclose(cfg); |
| } |
| } |
| |
| Loader::~Loader() |
| { |
| } |
| |
| const char* Loader::getTag(int dpy, int impl) |
| { |
| const Vector<entry_t>& cfgs(gConfig); |
| const size_t c = cfgs.size(); |
| for (size_t i=0 ; i<c ; i++) { |
| if (dpy == cfgs[i].dpy) |
| if (impl == cfgs[i].impl) |
| return cfgs[i].tag.string(); |
| } |
| return 0; |
| } |
| |
| void* Loader::open(EGLNativeDisplayType display, int impl, gl_hooks_t* hooks) |
| { |
| /* |
| * TODO: if we don't find display/0, then use 0/0 |
| * (0/0 should always work) |
| */ |
| |
| void* dso; |
| char path[PATH_MAX]; |
| int index = int(display); |
| driver_t* hnd = 0; |
| const char* const format = "/system/lib/egl/lib%s_%s.so"; |
| |
| char const* tag = getTag(index, impl); |
| if (tag) { |
| snprintf(path, PATH_MAX, format, "GLES", tag); |
| dso = load_driver(path, hooks, EGL | GLESv1_CM | GLESv2); |
| if (dso) { |
| hnd = new driver_t(dso); |
| } else { |
| // Always load EGL first |
| snprintf(path, PATH_MAX, format, "EGL", tag); |
| dso = load_driver(path, hooks, EGL); |
| if (dso) { |
| hnd = new driver_t(dso); |
| |
| // TODO: make this more automated |
| snprintf(path, PATH_MAX, format, "GLESv1_CM", tag); |
| hnd->set( load_driver(path, hooks, GLESv1_CM), GLESv1_CM ); |
| |
| snprintf(path, PATH_MAX, format, "GLESv2", tag); |
| hnd->set( load_driver(path, hooks, GLESv2), GLESv2 ); |
| } |
| } |
| } |
| |
| LOG_FATAL_IF(!index && !impl && !hnd, |
| "couldn't find the default OpenGL ES implementation " |
| "for default display"); |
| |
| return (void*)hnd; |
| } |
| |
| status_t Loader::close(void* driver) |
| { |
| driver_t* hnd = (driver_t*)driver; |
| delete hnd; |
| return NO_ERROR; |
| } |
| |
| void Loader::init_api(void* dso, |
| char const * const * api, |
| __eglMustCastToProperFunctionPointerType* curr, |
| getProcAddressType getProcAddress) |
| { |
| char scrap[256]; |
| while (*api) { |
| char const * name = *api; |
| __eglMustCastToProperFunctionPointerType f = |
| (__eglMustCastToProperFunctionPointerType)dlsym(dso, name); |
| if (f == NULL) { |
| // couldn't find the entry-point, use eglGetProcAddress() |
| f = getProcAddress(name); |
| } |
| if (f == NULL) { |
| // Try without the OES postfix |
| ssize_t index = ssize_t(strlen(name)) - 3; |
| if ((index>0 && (index<255)) && (!strcmp(name+index, "OES"))) { |
| strncpy(scrap, name, index); |
| scrap[index] = 0; |
| f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap); |
| //LOGD_IF(f, "found <%s> instead", scrap); |
| } |
| } |
| if (f == NULL) { |
| // Try with the OES postfix |
| ssize_t index = ssize_t(strlen(name)) - 3; |
| if ((index>0 && (index<252)) && (strcmp(name+index, "OES"))) { |
| strncpy(scrap, name, index); |
| scrap[index] = 0; |
| strcat(scrap, "OES"); |
| f = (__eglMustCastToProperFunctionPointerType)dlsym(dso, scrap); |
| //LOGD_IF(f, "found <%s> instead", scrap); |
| } |
| } |
| if (f == NULL) { |
| //LOGD("%s", name); |
| f = (__eglMustCastToProperFunctionPointerType)gl_unimplemented; |
| } |
| *curr++ = f; |
| api++; |
| } |
| } |
| |
| void *Loader::load_driver(const char* driver, gl_hooks_t* hooks, uint32_t mask) |
| { |
| //LOGD("%s", driver); |
| void* dso = dlopen(driver, RTLD_NOW | RTLD_LOCAL); |
| LOGE_IF(!dso, "%s", dlerror()); |
| if (dso == 0) |
| return 0; |
| |
| if (mask & EGL) { |
| getProcAddress = (getProcAddressType)dlsym(dso, "eglGetProcAddress"); |
| |
| LOGE_IF(!getProcAddress, |
| "can't find eglGetProcAddress() in %s", driver); |
| |
| gl_hooks_t::egl_t* egl = &hooks->egl; |
| __eglMustCastToProperFunctionPointerType* curr = |
| (__eglMustCastToProperFunctionPointerType*)egl; |
| char const * const * api = egl_names; |
| while (*api) { |
| char const * name = *api; |
| __eglMustCastToProperFunctionPointerType f = |
| (__eglMustCastToProperFunctionPointerType)dlsym(dso, name); |
| if (f == NULL) { |
| // couldn't find the entry-point, use eglGetProcAddress() |
| f = getProcAddress(name); |
| if (f == NULL) { |
| f = (__eglMustCastToProperFunctionPointerType)0; |
| } |
| } |
| *curr++ = f; |
| api++; |
| } |
| } |
| |
| if (mask & GLESv1_CM) { |
| init_api(dso, gl_names, |
| (__eglMustCastToProperFunctionPointerType*)&hooks->gl, |
| getProcAddress); |
| } |
| |
| if (mask & GLESv2) { |
| init_api(dso, gl2_names, |
| (__eglMustCastToProperFunctionPointerType*)&hooks->gl2, |
| getProcAddress); |
| } |
| |
| return dso; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| }; // namespace android |
| // ---------------------------------------------------------------------------- |