258385978c
If the EGL implementation supports the EGL_IMG_hibernate_process
extension, use it to hibernate (and hopefully release memory or other
resources) when the process isn't actively using EGL or OpenGL ES. The
idleness heuristic used in this change is:
(a) Wake up when entering any EGL API call, and remain awake for the
duration of the call.
(b) Do not hibernate when any window surface exists; this means the
application is very likely in the foreground.
(c) Do not hibernate while any context is made current to a thread.
The app may be using a client API without the EGL layer knowing,
so it is not safe to hibernate.
(d) Only check these conditions and attempt to hibernate after a
window surface is destroyed or a thread's context is detached. By
not attempting to hibernate at the end of every EGL call, we avoid
some transient wakeups/hibernate cycles when the app is mostly idle,
or is starting to become active but hasn't created its window
surface yet.
On a Galaxy Nexus, hibernating frees 1567 VM pages from the process.
Both hibernating and waking can take anywhere from 30ms to over 100ms
-- measurements have been very inconsistent.
Change-Id: Ib555f5d9d069aefccca06e8173a89625b5f32d7e
124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
/*
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** Copyright 2007, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include <ctype.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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#include <utils/threads.h>
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#include "egl_object.h"
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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egl_object_t::egl_object_t(egl_display_t* disp) :
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display(disp), count(1) {
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// NOTE: this does an implicit incRef
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display->addObject(this);
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}
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egl_object_t::~egl_object_t() {
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}
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void egl_object_t::terminate() {
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// this marks the object as "terminated"
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display->removeObject(this);
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if (decRef() == 1) {
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// shouldn't happen because this is called from LocalRef
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ALOGE("egl_object_t::terminate() removed the last reference!");
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}
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}
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void egl_object_t::destroy() {
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if (decRef() == 1) {
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delete this;
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}
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}
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bool egl_object_t::get(egl_display_t const* display, egl_object_t* object) {
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// used by LocalRef, this does an incRef() atomically with
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// checking that the object is valid.
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return display->getObject(object);
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}
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// ----------------------------------------------------------------------------
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egl_surface_t::egl_surface_t(egl_display_t* dpy, EGLConfig config,
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EGLNativeWindowType win, EGLSurface surface,
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egl_connection_t const* cnx) :
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egl_object_t(dpy), surface(surface), config(config), win(win), cnx(cnx)
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{
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if (win) {
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getDisplay()->onWindowSurfaceCreated();
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}
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}
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egl_surface_t::~egl_surface_t() {
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ANativeWindow* const window = win.get();
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if (window != NULL) {
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native_window_set_buffers_format(window, 0);
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if (native_window_api_disconnect(window, NATIVE_WINDOW_API_EGL)) {
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ALOGW("EGLNativeWindowType %p disconnect failed", window);
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}
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getDisplay()->onWindowSurfaceDestroyed();
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}
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}
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// ----------------------------------------------------------------------------
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egl_context_t::egl_context_t(EGLDisplay dpy, EGLContext context, EGLConfig config,
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egl_connection_t const* cnx, int version) :
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egl_object_t(get_display_nowake(dpy)), dpy(dpy), context(context),
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config(config), read(0), draw(0), cnx(cnx), version(version) {
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}
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void egl_context_t::onLooseCurrent() {
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read = NULL;
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draw = NULL;
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}
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void egl_context_t::onMakeCurrent(EGLSurface draw, EGLSurface read) {
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this->read = read;
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this->draw = draw;
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/*
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* Here we cache the GL_EXTENSIONS string for this context and we
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* add the extensions always handled by the wrapper
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*/
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if (gl_extensions.isEmpty()) {
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// call the implementation's glGetString(GL_EXTENSIONS)
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const char* exts = (const char *)gEGLImpl.hooks[version]->gl.glGetString(GL_EXTENSIONS);
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gl_extensions.setTo(exts);
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if (gl_extensions.find("GL_EXT_debug_marker") < 0) {
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String8 temp("GL_EXT_debug_marker ");
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temp.append(gl_extensions);
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gl_extensions.setTo(temp);
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}
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}
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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