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replicant-frameworks_native/opengl/libs/EGL/Loader.cpp
Mathias Agopian 993814255f change how the userspace GLES drivers are named 
for single library:
  /vendor/lib/egl/GLES.so

for multiple libraries:
  /vendor/lib/egl/EGL.so
  /vendor/lib/egl/GLESv1_CM.so
  /vendor/lib/egl/GLESv2.so

EGL_BOARD_CONFIG as well as egl.cfg are not needed anymore.

To facilitate the transition, the loader will also look
for the older naming scheme.

Bug: 8631636
Change-Id: Id4b113468df29bae72b323f76598229914e1c7a1
2013-04-26 23:49:01 +02:00

435 lines
14 KiB
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/*
** 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 <dirent.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include <EGL/egl.h>
#include "../glestrace.h"
#include "egldefs.h"
#include "Loader.h"
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
/*
* EGL userspace drivers must be provided either:
* - as a single library:
* /vendor/lib/egl/libGLES.so
*
* - as separate libraries:
* /vendor/lib/egl/libEGL.so
* /vendor/lib/egl/libGLESv1_CM.so
* /vendor/lib/egl/libGLESv2.so
*
* The software renderer for the emulator must be provided as a single
* library at:
*
* /system/lib/egl/libGLES_android.so
*
*
* For backward compatibility and to facilitate the transition to
* this new naming scheme, the loader will additionally look for:
*
* /{vendor|system}/lib/egl/lib{GLES | [EGL|GLESv1_CM|GLESv2]}_*.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()
: getProcAddress(NULL) {
}
Loader::~Loader() {
GLTrace_stop();
}
void* Loader::open(egl_connection_t* cnx)
{
void* dso;
driver_t* hnd = 0;
dso = load_driver("GLES", cnx, EGL | GLESv1_CM | GLESv2);
if (dso) {
hnd = new driver_t(dso);
} else {
// Always load EGL first
dso = load_driver("EGL", cnx, EGL);
if (dso) {
hnd = new driver_t(dso);
hnd->set( load_driver("GLESv1_CM", cnx, GLESv1_CM), GLESv1_CM );
hnd->set( load_driver("GLESv2", cnx, GLESv2), GLESv2 );
}
}
LOG_ALWAYS_FATAL_IF(!hnd, "couldn't find an OpenGL ES implementation");
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,
egl_connection_t* cnx, uint32_t mask)
{
class MatchFile {
public:
static String8 find(const char* kind) {
String8 result;
String8 pattern;
pattern.appendFormat("lib%s", kind);
const char* const searchPaths[] = {
"/vendor/lib/egl",
"/system/lib/egl"
};
// 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;
}
private:
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.");
result.setTo("/system/lib/egl/libGLES_android.so");
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;
}
};
String8 absolutePath = MatchFile::find(kind);
if (absolutePath.isEmpty()) {
// this happens often, we don't want to log an error
return 0;
}
const char* const driver_absolute_path = absolutePath.string();
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
// ----------------------------------------------------------------------------
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