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/*
* Copyright (C) 2011 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.
*/
//
// WARNING -------------------------- WARNING
// This code meant to be used for testing purposes only. It is not production
// level quality.
// Use on your own risk !!
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include "egl_dispatch.h"
#include "egl_ftable.h"
#include <log/log.h>
#include "ServerConnection.h"
#include "ThreadInfo.h"
#include <pthread.h>
#include "gl_wrapper_context.h"
#include "gl2_wrapper_context.h"
#define GLES_EMUL_TARGETS_FILE "/system/etc/gles_emul.cfg"
// implementation libraries;
#define GLESv1_enc_LIB "/system/lib/libGLESv1_enc.so"
#define GLESv2_enc_LIB "/system/lib/libGLESv2_enc.so"
#define GLES_android_LIB "/system/lib/egl/libGLES_android.so"
// driver libraries;
#define GLESv1_DRIVER "/system/lib/egl/libGLESv1_CM_emul.so"
#define GLESv2_DRIVER "/system/lib/egl/libGLESv2_emul.so"
static struct egl_dispatch *s_dispatch = NULL;
pthread_once_t dispatchTablesInitialized = PTHREAD_ONCE_INIT;
static bool s_needEncode = false;
static gl_wrapper_context_t *g_gl_dispatch = NULL;
static gl2_wrapper_context_t *g_gl2_dispatch = NULL;
template <class T>
int initApi(const char *driverLibName, const char *implLibName, T **dispatchTable, T *(*accessor)())
{
void *driverLib = dlopen(driverLibName, RTLD_NOW | RTLD_LOCAL);
if (driverLib == NULL) {
ALOGE("failed to load %s : %s\n", driverLibName, dlerror());
return -1;
}
typedef T *(*createFcn_t)(void *, T *(*accessor)());
createFcn_t createFcn;
createFcn = (createFcn_t) dlsym(driverLib, "createFromLib");
if (createFcn == NULL) {
ALOGE("failed to load createFromLib constructor function\n");
return -1;
}
void *implLib = dlopen(implLibName, RTLD_NOW | RTLD_LOCAL);
if (implLib == NULL) {
ALOGE("couldn't open %s", implLibName);
return -2;
}
*dispatchTable = createFcn(implLib, accessor);
if (*dispatchTable == NULL) {
return -3;
}
// XXX - we do close the impl library since it doesn't have data, as far as we concern.
dlclose(implLib);
// XXX - we do not dlclose the driver library, so its not initialized when
// later loaded by android - is this required?
ALOGD("loading %s into %s complete\n", implLibName, driverLibName);
return 0;
}
static gl_wrapper_context_t *getGLContext()
{
return g_gl_dispatch;
}
static gl2_wrapper_context_t *getGL2Context()
{
return g_gl2_dispatch;
}
const char *getProcName()
{
static constexpr size_t kMaxProcessNameLength = 100;
static const char procname[kMaxProcessNameLength]{0};
int rc = pthread_getname_np(pthread_self(), procname, kMaxProcessNameLength);
if (rc == 0) {
return procname;
}
return nullptr;
}
bool isNeedEncode()
{
const char *procname = getProcName();
if (procname == NULL) return false;
ALOGD("isNeedEncode? for %s\n", procname);
// check on our whitelist
FILE *fp = fopen(GLES_EMUL_TARGETS_FILE, "rt");
if (fp == NULL) {
ALOGE("couldn't open %s\n", GLES_EMUL_TARGETS_FILE);
return false;
}
char line[100];
bool found = false;
size_t procnameLen = strlen(procname);
while (fgets(line, sizeof(line), fp) != NULL) {
if (strlen(line) >= procnameLen &&
!strncmp(procname, line, procnameLen)) {
char c = line[procnameLen];
if (c == '\0' || c == ' ' || c == '\t' || c == '\n') {
found = true;
ALOGD("should use encoder for %s\n", procname);
break;
}
}
}
fclose(fp);
return found;
}
void initDispatchTables()
{
//
// Load our back-end implementation of EGL/GLES
//
ALOGD("Loading egl dispatch for %s\n", getProcName());
void *gles_android = dlopen("/system/lib/egl/libGLES_android.so", RTLD_NOW | RTLD_LOCAL);
if (!gles_android) {
fprintf(stderr,"FATAL ERROR: Could not load libGLES_android lib\n");
exit(-1);
}
//
// Load back-end EGL implementation library
//
s_dispatch = create_egl_dispatch( gles_android );
if (!s_dispatch) {
fprintf(stderr,"FATAL ERROR: Could not create egl dispatch\n");
exit(-1);
}
//
// initialize gles
//
s_needEncode = isNeedEncode();
void *gles_encoder = NULL;
if (s_needEncode) {
// initialize a connection to the server, and the GLESv1/v2 encoders;
ServerConnection * connection = ServerConnection::s_getServerConnection();
if (connection == NULL) {
ALOGE("couldn't create server connection\n");
s_needEncode = false;
}
}
// init dispatch tabels for GLESv1 & GLESv2
if (s_needEncode) {
// XXX - we do not check the retrun value because there isn't much we can do here on failure.
if (initApi<gl_wrapper_context_t>(GLESv1_DRIVER, GLESv1_enc_LIB, &g_gl_dispatch, getGLContext) < 0) {
// fallback to android on faluire
s_needEncode = false;
} else {
initApi<gl2_wrapper_context_t>(GLESv2_DRIVER, GLESv2_enc_LIB, &g_gl2_dispatch, getGL2Context);
}
}
if (!s_needEncode) {
ALOGD("Initializing native opengl for %s\n", getProcName());
initApi<gl_wrapper_context_t>(GLESv1_DRIVER, GLES_android_LIB, &g_gl_dispatch, getGLContext);
// try to initialize gl2 from GLES, though its probably going to fail
initApi<gl2_wrapper_context_t>(GLESv2_DRIVER, GLES_android_LIB, &g_gl2_dispatch, getGL2Context);
}
}
static struct egl_dispatch *getDispatch()
{
pthread_once(&dispatchTablesInitialized, initDispatchTables);
return s_dispatch;
}
__eglMustCastToProperFunctionPointerType eglGetProcAddress(const char *procname)
{
// search in EGL function table
for (int i=0; i<egl_num_funcs; i++) {
if (!strcmp(egl_funcs_by_name[i].name, procname)) {
return (__eglMustCastToProperFunctionPointerType)egl_funcs_by_name[i].proc;
}
}
// we do not support eglGetProcAddress for GLESv1 & GLESv2. The loader
// should be able to find this function through dynamic loading.
return NULL;
}
//////////////// Path through functions //////////
EGLint eglGetError()
{
return getDispatch()->eglGetError();
}
EGLDisplay eglGetDisplay(EGLNativeDisplayType display_id)
{
return getDispatch()->eglGetDisplay(display_id);
}
EGLBoolean eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
{
return getDispatch()->eglInitialize(dpy, major, minor);
}
EGLBoolean eglTerminate(EGLDisplay dpy)
{
return getDispatch()->eglTerminate(dpy);
}
const char* eglQueryString(EGLDisplay dpy, EGLint name)
{
return getDispatch()->eglQueryString(dpy, name);
}
EGLBoolean eglGetConfigs(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config)
{
return getDispatch()->eglGetConfigs(dpy, configs, config_size, num_config);
}
static EGLint * filter_es2_bit(const EGLint *attrib_list, bool *isES2)
{
if (attrib_list == NULL) {
if (isES2 != NULL) *isES2 = false;
return NULL;
}
EGLint *attribs = NULL;
int nAttribs = 0;
while(attrib_list[nAttribs] != EGL_NONE) nAttribs++;
nAttribs++;
attribs = new EGLint[nAttribs];
memcpy(attribs, attrib_list, nAttribs * sizeof(EGLint));
if (isES2 != NULL) *isES2 = false;
// scan the attribute list for ES2 request and replace with ES1.
for (int i = 0; i < nAttribs; i++) {
if (attribs[i] == EGL_RENDERABLE_TYPE) {
if (attribs[i + 1] & EGL_OPENGL_ES2_BIT) {
attribs[i + 1] &= ~EGL_OPENGL_ES2_BIT;
attribs[i + 1] |= EGL_OPENGL_ES_BIT;
ALOGD("removing ES2 bit 0x%x\n", attribs[i + 1]);
if (isES2 != NULL) *isES2 = true;
}
}
}
return attribs;
}
EGLBoolean eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config)
{
EGLBoolean res;
if (s_needEncode) {
EGLint *attribs = filter_es2_bit(attrib_list, NULL);
res = getDispatch()->eglChooseConfig(dpy,
attribs,
configs,
config_size,
num_config);
ALOGD("eglChooseConfig: %d configs found\n", *num_config);
if (*num_config == 0 && attribs != NULL) {
ALOGD("requested attributes:\n");
for (int i = 0; attribs[i] != EGL_NONE; i++) {
ALOGD("%d: 0x%x\n", i, attribs[i]);
}
}
delete attribs;
} else {
res = getDispatch()->eglChooseConfig(dpy, attrib_list, configs, config_size, num_config);
}
return res;
}
EGLBoolean eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
{
if (s_needEncode && attribute == EGL_RENDERABLE_TYPE) {
*value = EGL_OPENGL_ES_BIT | EGL_OPENGL_ES2_BIT;
return EGL_TRUE;
} else {
return getDispatch()->eglGetConfigAttrib(dpy, config, attribute, value);
}
}
EGLSurface eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, const EGLint *attrib_list)
{
EGLSurface surface = getDispatch()->eglCreateWindowSurface(dpy, config, win, attrib_list);
if (surface != EGL_NO_SURFACE) {
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
server->utEnc()->createSurface(server->utEnc(), getpid(), (uint32_t)surface);
}
}
return surface;
}
EGLSurface eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
{
EGLSurface surface = getDispatch()->eglCreatePbufferSurface(dpy, config, attrib_list);
if (surface != EGL_NO_SURFACE) {
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
server->utEnc()->createSurface(server->utEnc(), getpid(), (uint32_t)surface);
}
}
return surface;
}
EGLSurface eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list)
{
EGLSurface surface = getDispatch()->eglCreatePixmapSurface(dpy, config, pixmap, attrib_list);
if (surface != EGL_NO_SURFACE) {
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
server->utEnc()->createSurface(server->utEnc(), getpid(), (uint32_t)surface);
}
}
return surface;
}
EGLBoolean eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
{
EGLBoolean res = getDispatch()->eglDestroySurface(dpy, surface);
if (res && surface != EGL_NO_SURFACE) {
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
server->utEnc()->destroySurface(server->utEnc(), getpid(), (uint32_t)surface);
}
}
return res;
}
EGLBoolean eglQuerySurface(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value)
{
EGLBoolean res = getDispatch()->eglQuerySurface(dpy, surface, attribute, value);
if (res && attribute == EGL_RENDERABLE_TYPE) {
*value |= EGL_OPENGL_ES2_BIT;
}
return res;
}
EGLBoolean eglBindAPI(EGLenum api)
{
return getDispatch()->eglBindAPI(api);
}
EGLenum eglQueryAPI()
{
return getDispatch()->eglQueryAPI();
}
EGLBoolean eglWaitClient()
{
return getDispatch()->eglWaitClient();
}
EGLBoolean eglReleaseThread()
{
return getDispatch()->eglReleaseThread();
}
EGLSurface eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer, EGLConfig config, const EGLint *attrib_list)
{
return getDispatch()->eglCreatePbufferFromClientBuffer(dpy, buftype, buffer, config, attrib_list);
}
EGLBoolean eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
{
return getDispatch()->eglSurfaceAttrib(dpy, surface, attribute, value);
}
EGLBoolean eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
{
return getDispatch()->eglBindTexImage(dpy, surface, buffer);
}
EGLBoolean eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
{
return getDispatch()->eglReleaseTexImage(dpy, surface, buffer);
}
EGLBoolean eglSwapInterval(EGLDisplay dpy, EGLint interval)
{
return getDispatch()->eglSwapInterval(dpy, interval);
}
EGLContext eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list)
{
EGLContext share = share_context;
if (share) share = ((EGLWrapperContext *)share_context)->aglContext;
// check if are ES2, and convert it to ES1.
int nAttribs = 0;
if (attrib_list != NULL) {
while(attrib_list[nAttribs] != EGL_NONE) {
nAttribs++;
}
nAttribs++;
}
EGLint *attrib = NULL;
if (nAttribs > 0) {
attrib = new EGLint[nAttribs];
memcpy(attrib, attrib_list, nAttribs * sizeof(EGLint));
}
int version = 1;
for (int i = 0; i < nAttribs; i++) {
if (attrib[i] == EGL_CONTEXT_CLIENT_VERSION &&
attrib[i + 1] == 2) {
version = 2;
attrib[i + 1] = 1; // replace to version 1
}
}
EGLContext ctx = getDispatch()->eglCreateContext(dpy, config, share, attrib);
delete[] attrib;
EGLWrapperContext *wctx = new EGLWrapperContext(ctx, version);
if (ctx != EGL_NO_CONTEXT) {
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
wctx->clientState = new GLClientState();
server->utEnc()->createContext(server->utEnc(), getpid(),
(uint32_t)wctx,
(uint32_t)(share_context == EGL_NO_CONTEXT ? 0 : share_context), wctx->version);
}
}
return (EGLContext)wctx;
}
EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
{
EGLWrapperContext *wctx = (EGLWrapperContext *)ctx;
EGLBoolean res = EGL_FALSE;
if (ctx && ctx != EGL_NO_CONTEXT) {
res = getDispatch()->eglDestroyContext(dpy, wctx->aglContext);
if (res) {
EGLThreadInfo *ti = getEGLThreadInfo();
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection())) {
server->utEnc()->destroyContext(ti->serverConn->utEnc(), getpid(), (uint32_t)ctx);
}
if (ti->currentContext == wctx) ti->currentContext = NULL;
delete wctx;
}
}
return res;
}
EGLBoolean eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx)
{
EGLWrapperContext *wctx = (EGLWrapperContext *)ctx;
EGLContext aglContext = (ctx == EGL_NO_CONTEXT ? EGL_NO_CONTEXT : wctx->aglContext);
EGLThreadInfo *ti = getEGLThreadInfo();
EGLBoolean res = getDispatch()->eglMakeCurrent(dpy, draw, read, aglContext);
if (res ) {
// NOTE - we do get a pointer to the server connection, (rather then using ti->serverConn)
// for cases that this is the first egl call of the current thread.
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection())) {
server->utEnc()->makeCurrentContext(server->utEnc(), getpid(),
(uint32_t) (draw == EGL_NO_SURFACE ? 0 : draw),
(uint32_t) (read == EGL_NO_SURFACE ? 0 : read),
(uint32_t) (ctx == EGL_NO_CONTEXT ? 0 : ctx));
server->glEncoder()->setClientState( wctx ? wctx->clientState : NULL );
server->gl2Encoder()->setClientState( wctx ? wctx->clientState : NULL );
}
// set current context in our thread info
ti->currentContext = wctx;
}
return res;
}
EGLContext eglGetCurrentContext()
{
EGLThreadInfo *ti = getEGLThreadInfo();
return (ti->currentContext ? ti->currentContext : EGL_NO_CONTEXT);
}
EGLSurface eglGetCurrentSurface(EGLint readdraw)
{
return getDispatch()->eglGetCurrentSurface(readdraw);
}
EGLDisplay eglGetCurrentDisplay()
{
return getDispatch()->eglGetCurrentDisplay();
}
EGLBoolean eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value)
{
EGLWrapperContext *wctx = (EGLWrapperContext *)ctx;
if (wctx) {
if (attribute == EGL_CONTEXT_CLIENT_VERSION) {
*value = wctx->version;
return EGL_TRUE;
} else {
return getDispatch()->eglQueryContext(dpy, wctx->aglContext, attribute, value);
}
}
else {
return EGL_BAD_CONTEXT;
}
}
EGLBoolean eglWaitGL()
{
return getDispatch()->eglWaitGL();
}
EGLBoolean eglWaitNative(EGLint engine)
{
return getDispatch()->eglWaitNative(engine);
}
EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
{
ServerConnection *server;
if (s_needEncode && (server = ServerConnection::s_getServerConnection()) != NULL) {
server->utEnc()->swapBuffers(server->utEnc(), getpid(), (uint32_t)surface);
server->glEncoder()->flush();
server->gl2Encoder()->flush();
return 1;
}
return getDispatch()->eglSwapBuffers(dpy, surface);
}
EGLBoolean eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target)
{
return getDispatch()->eglCopyBuffers(dpy, surface, target);
}
EGLBoolean eglLockSurfaceKHR(EGLDisplay display, EGLSurface surface, const EGLint *attrib_list)
{
return getDispatch()->eglLockSurfaceKHR(display, surface, attrib_list);
}
EGLBoolean eglUnlockSurfaceKHR(EGLDisplay display, EGLSurface surface)
{
return getDispatch()->eglUnlockSurfaceKHR(display, surface);
}
EGLImageKHR eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list)
{
EGLWrapperContext *wctx = (EGLWrapperContext *)ctx;
EGLContext aglContext = (wctx ? wctx->aglContext : EGL_NO_CONTEXT);
return getDispatch()->eglCreateImageKHR(dpy, aglContext, target, buffer, attrib_list);
}
EGLBoolean eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR image)
{
return getDispatch()->eglDestroyImageKHR(dpy, image);
}
EGLSyncKHR eglCreateSyncKHR(EGLDisplay dpy, EGLenum type, const EGLint *attrib_list)
{
return getDispatch()->eglCreateSyncKHR(dpy, type, attrib_list);
}
EGLBoolean eglDestroySyncKHR(EGLDisplay dpy, EGLSyncKHR sync)
{
return getDispatch()->eglDestroySyncKHR(dpy, sync);
}
EGLint eglClientWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
{
return getDispatch()->eglClientWaitSyncKHR(dpy, sync, flags, timeout);
}
EGLBoolean eglSignalSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLenum mode)
{
return getDispatch()->eglSignalSyncKHR(dpy, sync, mode);
}
EGLBoolean eglGetSyncAttribKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLint *value)
{
return getDispatch()->eglGetSyncAttribKHR(dpy, sync, attribute, value);
}
EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw, EGLint left, EGLint top, EGLint width, EGLint height)
{
return getDispatch()->eglSetSwapRectangleANDROID(dpy, draw, left, top, width, height);
}