| /* |
| ** 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 "glestrace.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); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| static char const * getProcessCmdline() { |
| long pid = getpid(); |
| char procPath[128]; |
| snprintf(procPath, 128, "/proc/%ld/cmdline", pid); |
| FILE * file = fopen(procPath, "r"); |
| if (file) { |
| static char cmdline[256]; |
| char *str = fgets(cmdline, sizeof(cmdline) - 1, file); |
| fclose(file); |
| if (str) { |
| return cmdline; |
| } |
| } |
| return NULL; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| 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::Loader() |
| { |
| char line[256]; |
| char tag[256]; |
| |
| /* Special case for GLES emulation */ |
| if (checkGlesEmulationStatus() == 0) { |
| ALOGD("Emulator without GPU support detected. " |
| "Fallback to software renderer."); |
| mDriverTag.setTo("android"); |
| return; |
| } |
| |
| /* Otherwise, use egl.cfg */ |
| FILE* cfg = fopen("/system/lib/egl/egl.cfg", "r"); |
| if (cfg == NULL) { |
| // default config |
| ALOGD("egl.cfg not found, using default config"); |
| mDriverTag.setTo("android"); |
| } else { |
| while (fgets(line, 256, cfg)) { |
| int dpy, impl; |
| if (sscanf(line, "%u %u %s", &dpy, &impl, tag) == 3) { |
| //ALOGD(">>> %u %u %s", dpy, impl, tag); |
| // We only load the h/w accelerated implementation |
| if (tag != String8("android")) { |
| mDriverTag = tag; |
| } |
| } |
| } |
| fclose(cfg); |
| } |
| } |
| |
| Loader::~Loader() |
| { |
| GLTrace_stop(); |
| } |
| |
| void* Loader::open(egl_connection_t* cnx) |
| { |
| void* dso; |
| driver_t* hnd = 0; |
| |
| char const* tag = mDriverTag.string(); |
| 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 && !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 ssize_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); |
| //ALOGD_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); |
| //ALOGD_IF(f, "found <%s> instead", scrap); |
| } |
| } |
| if (f == NULL) { |
| //ALOGD("%s", name); |
| f = (__eglMustCastToProperFunctionPointerType)gl_unimplemented; |
| |
| /* |
| * GL_EXT_debug_label is special, we always report it as |
| * supported, it's handled by GLES_trace. If GLES_trace is not |
| * enabled, then these are no-ops. |
| */ |
| if (!strcmp(name, "glInsertEventMarkerEXT")) { |
| f = (__eglMustCastToProperFunctionPointerType)gl_noop; |
| } else if (!strcmp(name, "glPushGroupMarkerEXT")) { |
| f = (__eglMustCastToProperFunctionPointerType)gl_noop; |
| } else if (!strcmp(name, "glPopGroupMarkerEXT")) { |
| f = (__eglMustCastToProperFunctionPointerType)gl_noop; |
| } |
| } |
| *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(); |
| ALOGE("load_driver(%s): %s", driver_absolute_path, err?err:"unknown"); |
| return 0; |
| } |
| |
| ALOGD("loaded %s", driver_absolute_path); |
| |
| if (mask & EGL) { |
| getProcAddress = (getProcAddressType)dlsym(dso, "eglGetProcAddress"); |
| |
| ALOGE_IF(!getProcAddress, |
| "can't find eglGetProcAddress() in %s", driver_absolute_path); |
| |
| #ifdef SYSTEMUI_PBSIZE_HACK |
| #warning "SYSTEMUI_PBSIZE_HACK enabled" |
| /* |
| * TODO: replace SYSTEMUI_PBSIZE_HACK by something less hackish |
| * |
| * Here we adjust the PB size from its default value to 512KB which |
| * is the minimum acceptable for the systemui process. |
| * We do this on low-end devices only because it allows us to enable |
| * h/w acceleration in the systemui process while keeping the |
| * memory usage down. |
| * |
| * Obviously, this is the wrong place and wrong way to make this |
| * adjustment, but at the time of this writing this was the safest |
| * solution. |
| */ |
| const char *cmdline = getProcessCmdline(); |
| if (strstr(cmdline, "systemui")) { |
| void *imgegl = dlopen("/vendor/lib/libIMGegl.so", RTLD_LAZY); |
| if (imgegl) { |
| unsigned int *PVRDefaultPBS = |
| (unsigned int *)dlsym(imgegl, "PVRDefaultPBS"); |
| if (PVRDefaultPBS) { |
| ALOGD("setting default PBS to 512KB, was %d KB", *PVRDefaultPBS / 1024); |
| *PVRDefaultPBS = 512*1024; |
| } |
| } |
| } |
| #endif |
| |
| 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[egl_connection_t::GLESv1_INDEX]->gl, |
| getProcAddress); |
| } |
| |
| if (mask & GLESv2) { |
| init_api(dso, gl_names, |
| (__eglMustCastToProperFunctionPointerType*) |
| &cnx->hooks[egl_connection_t::GLESv2_INDEX]->gl, |
| getProcAddress); |
| } |
| |
| return dso; |
| } |
| |
| // ---------------------------------------------------------------------------- |
| }; // namespace android |
| // ---------------------------------------------------------------------------- |
