/* ** 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 <cutils/properties.h> #include <EGL/egl.h> #include "egldefs.h" #include "glesv2dbg.h" #include "hooks.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 ) /* This function is called to check whether we run inside the emulator, * and if this is the case whether GLES GPU emulation is supported. * * Returned values are: * -1 -> not running inside the emulator * 0 -> running inside the emulator, but GPU emulation not supported * 1 -> running inside the emulator, GPU emulation is supported * through the "emulation" config. */ static int checkGlesEmulationStatus(void) { /* We're going to check for the following kernel parameters: * * qemu=1 -> tells us that we run inside the emulator * android.qemu.gles=<number> -> tells us the GLES GPU emulation status * * Note that we will return <number> if we find it. This let us support * more additionnal emulation modes in the future. */ char prop[PROPERTY_VALUE_MAX]; int result = -1; /* First, check for qemu=1 */ property_get("ro.kernel.qemu",prop,"0"); if (atoi(prop) != 1) return -1; /* We are in the emulator, get GPU status value */ property_get("ro.kernel.qemu.gles",prop,"0"); return atoi(prop); } // ---------------------------------------------------------------------------- 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]; /* Special case for GLES emulation */ if (checkGlesEmulationStatus() == 0) { LOGD("Emulator without GPU support detected. Fallback to software renderer."); gConfig.add( entry_t(0, 0, "android") ); return; } /* Otherwise, use egl.cfg */ 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() { StopDebugServer(); } 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, egl_connection_t* cnx) { /* * TODO: if we don't find display/0, then use 0/0 * (0/0 should always work) */ void* dso; int index = int(display); driver_t* hnd = 0; char const* tag = getTag(index, impl); if (tag) { dso = load_driver("GLES", tag, cnx, EGL | GLESv1_CM | GLESv2); if (dso) { hnd = new driver_t(dso); } else { // Always load EGL first dso = load_driver("EGL", tag, cnx, EGL); if (dso) { hnd = new driver_t(dso); // TODO: make this more automated hnd->set( load_driver("GLESv1_CM", tag, cnx, GLESv1_CM), GLESv1_CM ); hnd->set( load_driver("GLESv2", tag, cnx, 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) { const size_t SIZE = 256; char scrap[SIZE]; 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<SIZE-1)) && (!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 && strcmp(name+index, "OES")) { snprintf(scrap, SIZE, "%sOES", name); 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* kind, const char *tag, egl_connection_t* cnx, uint32_t mask) { char driver_absolute_path[PATH_MAX]; const char* const search1 = "/vendor/lib/egl/lib%s_%s.so"; const char* const search2 = "/system/lib/egl/lib%s_%s.so"; snprintf(driver_absolute_path, PATH_MAX, search1, kind, tag); if (access(driver_absolute_path, R_OK)) { snprintf(driver_absolute_path, PATH_MAX, search2, kind, tag); if (access(driver_absolute_path, R_OK)) { // this happens often, we don't want to log an error return 0; } } void* dso = dlopen(driver_absolute_path, RTLD_NOW | RTLD_LOCAL); if (dso == 0) { const char* err = dlerror(); LOGE("load_driver(%s): %s", driver_absolute_path, err?err:"unknown"); return 0; } LOGD("loaded %s", driver_absolute_path); if (mask & EGL) { getProcAddress = (getProcAddressType)dlsym(dso, "eglGetProcAddress"); LOGE_IF(!getProcAddress, "can't find eglGetProcAddress() in %s", driver_absolute_path); egl_t* egl = &cnx->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*) &cnx->hooks[GLESv1_INDEX]->gl, getProcAddress); } if (mask & GLESv2) { init_api(dso, gl_names, (__eglMustCastToProperFunctionPointerType*) &cnx->hooks[GLESv2_INDEX]->gl, getProcAddress); } return dso; } // ---------------------------------------------------------------------------- }; // namespace android // ----------------------------------------------------------------------------