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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 <EGL/egl.h>
#include <android-base/properties.h>
#include <log/log.h>
#include <stdlib.h>
#include "../egl_impl.h"
#include "CallStack.h"
#include "Loader.h"
#include "egl_display.h"
#include "egl_layers.h"
#include "egl_object.h"
#include "egl_tls.h"
#include "egldefs.h"
namespace android {
egl_connection_t gEGLImpl;
gl_hooks_t gHooks[2];
gl_hooks_t gHooksNoContext;
pthread_key_t gGLWrapperKey = -1;
void setGLHooksThreadSpecific(gl_hooks_t const* value) {
setGlThreadSpecific(value);
}
static int gl_no_context() {
if (egl_tls_t::logNoContextCall()) {
const char* const error = "call to OpenGL ES API with "
"no current context (logged once per thread)";
if (LOG_NDEBUG) {
ALOGE(error);
} else {
LOG_ALWAYS_FATAL(error);
}
if (base::GetBoolProperty("debug.egl.callstack", false)) {
CallStack::log(LOG_TAG);
}
}
return 0;
}
static void early_egl_init(void) {
int numHooks = sizeof(gHooksNoContext) / sizeof(EGLFuncPointer);
EGLFuncPointer* iter = reinterpret_cast<EGLFuncPointer*>(&gHooksNoContext);
for (int hook = 0; hook < numHooks; ++hook) {
*(iter++) = reinterpret_cast<EGLFuncPointer>(gl_no_context);
}
setGLHooksThreadSpecific(&gHooksNoContext);
}
const GLubyte* egl_get_string_for_current_context(GLenum name) {
// NOTE: returning NULL here will fall-back to the default
// implementation.
EGLContext context = egl_tls_t::getContext();
if (context == EGL_NO_CONTEXT) return nullptr;
const egl_context_t* const c = get_context(context);
if (c == nullptr) // this should never happen, by construction
return nullptr;
if (name != GL_EXTENSIONS) return nullptr;
return (const GLubyte*)c->gl_extensions.c_str();
}
const GLubyte* egl_get_string_for_current_context(GLenum name, GLuint index) {
// NOTE: returning NULL here will fall-back to the default
// implementation.
EGLContext context = egl_tls_t::getContext();
if (context == EGL_NO_CONTEXT) return nullptr;
const egl_context_t* const c = get_context(context);
if (c == nullptr) // this should never happen, by construction
return nullptr;
if (name != GL_EXTENSIONS) return nullptr;
// if index is out of bounds, assume it will be in the default
// implementation too, so we don't have to generate a GL error here
if (index >= c->tokenized_gl_extensions.size()) return nullptr;
return (const GLubyte*)c->tokenized_gl_extensions[index].c_str();
}
GLint egl_get_num_extensions_for_current_context() {
// NOTE: returning -1 here will fall-back to the default
// implementation.
EGLContext context = egl_tls_t::getContext();
if (context == EGL_NO_CONTEXT) return -1;
const egl_context_t* const c = get_context(context);
if (c == nullptr) // this should never happen, by construction
return -1;
return (GLint)c->tokenized_gl_extensions.size();
}
egl_connection_t* egl_get_connection() {
return &gEGLImpl;
}
static pthread_once_t once_control = PTHREAD_ONCE_INIT;
static int sEarlyInitState = pthread_once(&once_control, &early_egl_init);
static EGLBoolean egl_init_drivers_locked() {
if (sEarlyInitState) {
// initialized by static ctor. should be set here.
return EGL_FALSE;
}
// get our driver loader
Loader& loader(Loader::getInstance());
// dynamically load our EGL implementation
egl_connection_t* cnx = &gEGLImpl;
cnx->hooks[egl_connection_t::GLESv1_INDEX] = &gHooks[egl_connection_t::GLESv1_INDEX];
cnx->hooks[egl_connection_t::GLESv2_INDEX] = &gHooks[egl_connection_t::GLESv2_INDEX];
cnx->dso = loader.open(cnx);
// Check to see if any layers are enabled and route functions through them
if (cnx->dso) {
// Layers can be enabled long after the drivers have been loaded.
// They will only be initialized once.
LayerLoader& layer_loader(LayerLoader::getInstance());
layer_loader.InitLayers(cnx);
}
return cnx->dso ? EGL_TRUE : EGL_FALSE;
}
// this mutex protects driver load logic as a critical section since it accesses to global variable
// like gEGLImpl
static pthread_mutex_t sInitDriverMutex = PTHREAD_MUTEX_INITIALIZER;
EGLBoolean egl_init_drivers() {
EGLBoolean res;
pthread_mutex_lock(&sInitDriverMutex);
res = egl_init_drivers_locked();
pthread_mutex_unlock(&sInitDriverMutex);
return res;
}
static pthread_mutex_t sLogPrintMutex = PTHREAD_MUTEX_INITIALIZER;
static std::chrono::steady_clock::time_point sLogPrintTime;
static constexpr std::chrono::seconds DURATION(1);
void gl_unimplemented() {
bool printLog = false;
auto now = std::chrono::steady_clock::now();
pthread_mutex_lock(&sLogPrintMutex);
if ((now - sLogPrintTime) > DURATION) {
sLogPrintTime = now;
printLog = true;
}
pthread_mutex_unlock(&sLogPrintMutex);
if (printLog) {
ALOGE("called unimplemented OpenGL ES API");
if (base::GetBoolProperty("debug.egl.callstack", false)) {
CallStack::log(LOG_TAG);
}
}
}
void gl_noop() {}
void setGlThreadSpecific(gl_hooks_t const* value) {
gl_hooks_t const* volatile* tls_hooks = get_tls_hooks();
tls_hooks[TLS_SLOT_OPENGL_API] = value;
}
// ----------------------------------------------------------------------------
// GL / EGL hooks
// ----------------------------------------------------------------------------
#undef GL_ENTRY
#undef EGL_ENTRY
#define GL_ENTRY(_r, _api, ...) #_api,
#define EGL_ENTRY(_r, _api, ...) #_api,
char const * const gl_names[] = {
#include "../entries.in"
nullptr
};
char const * const gl_names_1[] = {
#include "../entries_gles1.in"
nullptr
};
char const * const egl_names[] = {
#include "egl_entries.in"
nullptr
};
char const * const platform_names[] = {
#include "platform_entries.in"
nullptr
};
#undef GL_ENTRY
#undef EGL_ENTRY
}; // namespace android
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