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()
{
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);
}
}
static bool find(String8& result,
const String8& pattern, const char* const search, bool exact) {
// in the emulator case, we just return the hardcoded name
// of the software renderer.
if (checkGlesEmulationStatus() == 0) {
ALOGD("Emulator without GPU support detected. "
"Fallback to software renderer.");
#if defined(__LP64__)
result.setTo("/system/lib64/egl/libGLES_android.so");
#else
result.setTo("/system/lib/egl/libGLES_android.so");
#endif
return true;
}
if (exact) {
String8 absolutePath;
absolutePath.appendFormat("%s/%s.so", search, pattern.string());
if (!access(absolutePath.string(), R_OK)) {
result = absolutePath;
return true;
}
return false;
}
DIR* d = opendir(search);
if (d != NULL) {
struct dirent cur;
struct dirent* e;
while (readdir_r(d, &cur, &e) == 0 && e) {
if (e->d_type == DT_DIR) {
continue;
}
if (!strcmp(e->d_name, "libGLES_android.so")) {
// always skip the software renderer
continue;
}
if (strstr(e->d_name, pattern.string()) == e->d_name) {
if (!strcmp(e->d_name + strlen(e->d_name) - 3, ".so")) {
result.clear();
result.appendFormat("%s/%s", search, e->d_name);
closedir(d);
return true;
}
}
}
closedir(d);
}
return false;
}
static String8 find(const char* kind) {
String8 result;
int emulationStatus = checkGlesEmulationStatus();
switch (emulationStatus) {
case 0:
#if defined(__LP64__)
result.setTo("/system/lib64/egl/libGLES_android.so");
#else
result.setTo("/system/lib/egl/libGLES_android.so");
#endif
return result;
case 1:
// Use host-side OpenGL through the "emulation" library
#if defined(__LP64__)
result.appendFormat("/system/lib64/egl/lib%s_emulation.so", kind);
#else
result.appendFormat("/system/lib/egl/lib%s_emulation.so", kind);
#endif
return result;
default:
// Not in emulator, or use other guest-side implementation
break;
}
String8 pattern;
pattern.appendFormat("lib%s", kind);
const char* const searchPaths[] = {
#if defined(__LP64__)
"/vendor/lib64/egl",
"/system/lib64/egl"
#else
"/vendor/lib/egl",
"/system/lib/egl"
#endif
};
// first, we search for the exact name of the GLES userspace
// driver in both locations.
// i.e.:
// libGLES.so, or:
// libEGL.so, libGLESv1_CM.so, libGLESv2.so
for (size_t i=0 ; i<NELEM(searchPaths) ; i++) {
if (find(result, pattern, searchPaths[i], true)) {
return result;
}
}
// for compatibility with the old "egl.cfg" naming convention
// we look for files that match:
// libGLES_*.so, or:
// libEGL_*.so, libGLESv1_CM_*.so, libGLESv2_*.so
pattern.append("_");
for (size_t i=0 ; i<NELEM(searchPaths) ; i++) {
if (find(result, pattern, searchPaths[i], false)) {
return result;
}
}
// we didn't find the driver. gah.
result.clear();
return result;
}
