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kwin/platformsupport/scenes/opengl/abstract_egl_backend.cpp
Eike Hein 2c26215d7e Request a high-priority EGL contexts 
Summary:
This patch implements using EGL_IMG_context_priority to request
high-priority rendering contexts if the extension is available.

EGL_IMG_context_priority is currently used in this fashion by
e.g. Android's SurfaceFlinger (RenderEngine.cpp) and libweston
(gl-renderer.c) and seems promising given this widespread
acceptance.

Reviewers: #kwin, graesslin, romangg, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D11572
2018-03-29 20:34:22 +09:00

544 lines
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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "abstract_egl_backend.h"
#include "texture.h"
#include "composite.h"
#include "egl_context_attribute_builder.h"
#include "options.h"
#include "platform.h"
#include "scene.h"
#include "wayland_server.h"
#include <KWayland/Server/buffer_interface.h>
#include <KWayland/Server/display.h>
#include <KWayland/Server/surface_interface.h>
// kwin libs
#include <logging.h>
#include <kwinglplatform.h>
#include <kwinglutils.h>
// Qt
#include <QOpenGLContext>
#include <QOpenGLFramebufferObject>
#include <memory>
namespace KWin
{
typedef GLboolean(*eglBindWaylandDisplayWL_func)(EGLDisplay dpy, wl_display *display);
typedef GLboolean(*eglUnbindWaylandDisplayWL_func)(EGLDisplay dpy, wl_display *display);
typedef GLboolean(*eglQueryWaylandBufferWL_func)(EGLDisplay dpy, struct wl_resource *buffer, EGLint attribute, EGLint *value);
eglBindWaylandDisplayWL_func eglBindWaylandDisplayWL = nullptr;
eglUnbindWaylandDisplayWL_func eglUnbindWaylandDisplayWL = nullptr;
eglQueryWaylandBufferWL_func eglQueryWaylandBufferWL = nullptr;
#ifndef EGL_WAYLAND_BUFFER_WL
#define EGL_WAYLAND_BUFFER_WL 0x31D5
#endif
#ifndef EGL_WAYLAND_PLANE_WL
#define EGL_WAYLAND_PLANE_WL 0x31D6
#endif
#ifndef EGL_WAYLAND_Y_INVERTED_WL
#define EGL_WAYLAND_Y_INVERTED_WL 0x31DB
#endif
AbstractEglBackend::AbstractEglBackend()
: QObject(nullptr)
, OpenGLBackend()
{
connect(Compositor::self(), &Compositor::aboutToDestroy, this, &AbstractEglBackend::unbindWaylandDisplay);
}
AbstractEglBackend::~AbstractEglBackend() = default;
void AbstractEglBackend::unbindWaylandDisplay()
{
if (eglUnbindWaylandDisplayWL && m_display != EGL_NO_DISPLAY) {
eglUnbindWaylandDisplayWL(m_display, *(WaylandServer::self()->display()));
}
}
void AbstractEglBackend::cleanup()
{
cleanupGL();
doneCurrent();
eglDestroyContext(m_display, m_context);
cleanupSurfaces();
eglReleaseThread();
kwinApp()->platform()->setSceneEglContext(EGL_NO_CONTEXT);
kwinApp()->platform()->setSceneEglSurface(EGL_NO_SURFACE);
kwinApp()->platform()->setSceneEglConfig(nullptr);
}
void AbstractEglBackend::cleanupSurfaces()
{
if (m_surface != EGL_NO_SURFACE) {
eglDestroySurface(m_display, m_surface);
}
}
bool AbstractEglBackend::initEglAPI()
{
EGLint major, minor;
if (eglInitialize(m_display, &major, &minor) == EGL_FALSE) {
qCWarning(KWIN_OPENGL) << "eglInitialize failed";
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
qCWarning(KWIN_OPENGL) << "Error during eglInitialize " << error;
}
return false;
}
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
qCWarning(KWIN_OPENGL) << "Error during eglInitialize " << error;
return false;
}
qCDebug(KWIN_OPENGL) << "Egl Initialize succeeded";
if (eglBindAPI(isOpenGLES() ? EGL_OPENGL_ES_API : EGL_OPENGL_API) == EGL_FALSE) {
qCCritical(KWIN_OPENGL) << "bind OpenGL API failed";
return false;
}
qCDebug(KWIN_OPENGL) << "EGL version: " << major << "." << minor;
const QByteArray eglExtensions = eglQueryString(m_display, EGL_EXTENSIONS);
setExtensions(eglExtensions.split(' '));
return true;
}
typedef void (*eglFuncPtr)();
static eglFuncPtr getProcAddress(const char* name)
{
return eglGetProcAddress(name);
}
void AbstractEglBackend::initKWinGL()
{
GLPlatform *glPlatform = GLPlatform::instance();
glPlatform->detect(EglPlatformInterface);
options->setGlPreferBufferSwap(options->glPreferBufferSwap()); // resolve autosetting
if (options->glPreferBufferSwap() == Options::AutoSwapStrategy)
options->setGlPreferBufferSwap('e'); // for unknown drivers - should not happen
glPlatform->printResults();
initGL(&getProcAddress);
}
void AbstractEglBackend::initBufferAge()
{
setSupportsBufferAge(false);
if (hasExtension(QByteArrayLiteral("EGL_EXT_buffer_age"))) {
const QByteArray useBufferAge = qgetenv("KWIN_USE_BUFFER_AGE");
if (useBufferAge != "0")
setSupportsBufferAge(true);
}
}
void AbstractEglBackend::initWayland()
{
if (!WaylandServer::self()) {
return;
}
if (hasExtension(QByteArrayLiteral("EGL_WL_bind_wayland_display"))) {
eglBindWaylandDisplayWL = (eglBindWaylandDisplayWL_func)eglGetProcAddress("eglBindWaylandDisplayWL");
eglUnbindWaylandDisplayWL = (eglUnbindWaylandDisplayWL_func)eglGetProcAddress("eglUnbindWaylandDisplayWL");
eglQueryWaylandBufferWL = (eglQueryWaylandBufferWL_func)eglGetProcAddress("eglQueryWaylandBufferWL");
// only bind if not already done
if (waylandServer()->display()->eglDisplay() != eglDisplay()) {
if (!eglBindWaylandDisplayWL(eglDisplay(), *(WaylandServer::self()->display()))) {
eglUnbindWaylandDisplayWL = nullptr;
eglQueryWaylandBufferWL = nullptr;
} else {
waylandServer()->display()->setEglDisplay(eglDisplay());
}
}
}
}
void AbstractEglBackend::initClientExtensions()
{
// Get the list of client extensions
const char* clientExtensionsCString = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
const QByteArray clientExtensionsString = QByteArray::fromRawData(clientExtensionsCString, qstrlen(clientExtensionsCString));
if (clientExtensionsString.isEmpty()) {
// If eglQueryString() returned NULL, the implementation doesn't support
// EGL_EXT_client_extensions. Expect an EGL_BAD_DISPLAY error.
(void) eglGetError();
}
m_clientExtensions = clientExtensionsString.split(' ');
}
bool AbstractEglBackend::hasClientExtension(const QByteArray &ext) const
{
return m_clientExtensions.contains(ext);
}
bool AbstractEglBackend::makeCurrent()
{
if (QOpenGLContext *context = QOpenGLContext::currentContext()) {
// Workaround to tell Qt that no QOpenGLContext is current
context->doneCurrent();
}
const bool current = eglMakeCurrent(m_display, m_surface, m_surface, m_context);
return current;
}
void AbstractEglBackend::doneCurrent()
{
eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
}
bool AbstractEglBackend::isOpenGLES() const
{
if (qstrcmp(qgetenv("KWIN_COMPOSE"), "O2ES") == 0) {
return true;
}
return QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGLES;
}
bool AbstractEglBackend::createContext()
{
const bool haveRobustness = hasExtension(QByteArrayLiteral("EGL_EXT_create_context_robustness"));
const bool haveCreateContext = hasExtension(QByteArrayLiteral("EGL_KHR_create_context"));
const bool haveContextPriority = hasExtension(QByteArrayLiteral("EGL_IMG_context_priority"));
std::vector<std::unique_ptr<AbstractOpenGLContextAttributeBuilder>> candidates;
if (isOpenGLES()) {
if (haveCreateContext && haveRobustness && haveContextPriority) {
auto glesRobustPriority = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglOpenGLESContextAttributeBuilder);
glesRobustPriority->setVersion(2);
glesRobustPriority->setRobust(true);
glesRobustPriority->setHighPriority(true);
candidates.push_back(std::move(glesRobustPriority));
}
if (haveCreateContext && haveRobustness) {
auto glesRobust = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglOpenGLESContextAttributeBuilder);
glesRobust->setVersion(2);
glesRobust->setRobust(true);
candidates.push_back(std::move(glesRobust));
}
if (haveContextPriority) {
auto glesPriority = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglOpenGLESContextAttributeBuilder);
glesPriority->setVersion(2);
glesPriority->setHighPriority(true);
candidates.push_back(std::move(glesPriority));
}
auto gles = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglOpenGLESContextAttributeBuilder);
gles->setVersion(2);
candidates.push_back(std::move(gles));
} else {
if (options->glCoreProfile() && haveCreateContext) {
if (haveRobustness && haveContextPriority) {
auto robustCorePriority = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
robustCorePriority->setVersion(3, 1);
robustCorePriority->setRobust(true);
robustCorePriority->setHighPriority(true);
candidates.push_back(std::move(robustCorePriority));
}
if (haveRobustness) {
auto robustCore = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
robustCore->setVersion(3, 1);
robustCore->setRobust(true);
candidates.push_back(std::move(robustCore));
}
if (haveContextPriority) {
auto corePriority = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
corePriority->setVersion(3, 1);
corePriority->setHighPriority(true);
candidates.push_back(std::move(corePriority));
}
auto core = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
core->setVersion(3, 1);
candidates.push_back(std::move(core));
}
if (haveRobustness && haveCreateContext && haveContextPriority) {
auto robustPriority = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
robustPriority->setRobust(true);
robustPriority->setHighPriority(true);
candidates.push_back(std::move(robustPriority));
}
if (haveRobustness && haveCreateContext) {
auto robust = std::unique_ptr<AbstractOpenGLContextAttributeBuilder>(new EglContextAttributeBuilder);
robust->setRobust(true);
candidates.push_back(std::move(robust));
}
candidates.emplace_back(new EglContextAttributeBuilder);
}
EGLContext ctx = EGL_NO_CONTEXT;
for (auto it = candidates.begin(); it != candidates.end(); it++) {
const auto attribs = (*it)->build();
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, attribs.data());
if (ctx != EGL_NO_CONTEXT) {
qCDebug(KWIN_OPENGL) << "Created EGL context with attributes:" << (*it).get();
break;
}
}
if (ctx == EGL_NO_CONTEXT) {
qCCritical(KWIN_OPENGL) << "Create Context failed";
return false;
}
m_context = ctx;
kwinApp()->platform()->setSceneEglContext(m_context);
return true;
}
void AbstractEglBackend::setEglDisplay(const EGLDisplay &display) {
m_display = display;
kwinApp()->platform()->setSceneEglDisplay(display);
}
void AbstractEglBackend::setConfig(const EGLConfig &config)
{
m_config = config;
kwinApp()->platform()->setSceneEglConfig(config);
}
void AbstractEglBackend::setSurface(const EGLSurface &surface)
{
m_surface = surface;
kwinApp()->platform()->setSceneEglSurface(surface);
}
AbstractEglTexture::AbstractEglTexture(SceneOpenGLTexture *texture, AbstractEglBackend *backend)
: SceneOpenGLTexturePrivate()
, q(texture)
, m_backend(backend)
, m_image(EGL_NO_IMAGE_KHR)
{
m_target = GL_TEXTURE_2D;
}
AbstractEglTexture::~AbstractEglTexture()
{
if (m_image != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(m_backend->eglDisplay(), m_image);
}
}
OpenGLBackend *AbstractEglTexture::backend()
{
return m_backend;
}
bool AbstractEglTexture::loadTexture(WindowPixmap *pixmap)
{
const auto &buffer = pixmap->buffer();
if (buffer.isNull()) {
if (updateFromFBO(pixmap->fbo())) {
return true;
}
return false;
}
// try Wayland loading
if (auto s = pixmap->surface()) {
s->resetTrackedDamage();
}
if (buffer->shmBuffer()) {
return loadShmTexture(buffer);
} else {
return loadEglTexture(buffer);
}
}
void AbstractEglTexture::updateTexture(WindowPixmap *pixmap)
{
const auto &buffer = pixmap->buffer();
if (buffer.isNull()) {
const auto &fbo = pixmap->fbo();
if (!fbo.isNull()) {
if (m_texture != fbo->texture()) {
updateFromFBO(fbo);
}
return;
}
return;
}
auto s = pixmap->surface();
if (!buffer->shmBuffer()) {
q->bind();
EGLImageKHR image = attach(buffer);
q->unbind();
if (image != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(m_backend->eglDisplay(), m_image);
m_image = image;
}
if (s) {
s->resetTrackedDamage();
}
return;
}
// shm fallback
const QImage &image = buffer->data();
if (image.isNull() || !s) {
return;
}
Q_ASSERT(image.size() == m_size);
q->bind();
const QRegion damage = s->trackedDamage();
s->resetTrackedDamage();
auto scale = s->scale(); //damage is normalised, so needs converting up to match texture
// TODO: this should be shared with GLTexture::update
if (GLPlatform::instance()->isGLES()) {
if (s_supportsARGB32 && (image.format() == QImage::Format_ARGB32 || image.format() == QImage::Format_ARGB32_Premultiplied)) {
const QImage im = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
for (const QRect &rect : damage.rects()) {
auto scaledRect = QRect(rect.x() * scale, rect.y() * scale, rect.width() * scale, rect.height() * scale);
glTexSubImage2D(m_target, 0, scaledRect.x(), scaledRect.y(), scaledRect.width(), scaledRect.height(),
GL_BGRA_EXT, GL_UNSIGNED_BYTE, im.copy(scaledRect).bits());
}
} else {
const QImage im = image.convertToFormat(QImage::Format_RGBA8888_Premultiplied);
for (const QRect &rect : damage.rects()) {
auto scaledRect = QRect(rect.x() * scale, rect.y() * scale, rect.width() * scale, rect.height() * scale);
glTexSubImage2D(m_target, 0, scaledRect.x(), scaledRect.y(), scaledRect.width(), scaledRect.height(),
GL_RGBA, GL_UNSIGNED_BYTE, im.copy(scaledRect).bits());
}
}
} else {
const QImage im = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
for (const QRect &rect : damage.rects()) {
auto scaledRect = QRect(rect.x() * scale, rect.y() * scale, rect.width() * scale, rect.height() * scale);
glTexSubImage2D(m_target, 0, scaledRect.x(), scaledRect.y(), scaledRect.width(), scaledRect.height(),
GL_BGRA, GL_UNSIGNED_BYTE, im.copy(scaledRect).bits());
}
}
q->unbind();
}
bool AbstractEglTexture::loadShmTexture(const QPointer< KWayland::Server::BufferInterface > &buffer)
{
const QImage &image = buffer->data();
if (image.isNull()) {
return false;
}
glGenTextures(1, &m_texture);
q->setWrapMode(GL_CLAMP_TO_EDGE);
q->setFilter(GL_LINEAR);
q->bind();
const QSize &size = image.size();
// TODO: this should be shared with GLTexture(const QImage&, GLenum)
GLenum format = 0;
switch (image.format()) {
case QImage::Format_ARGB32:
case QImage::Format_ARGB32_Premultiplied:
format = GL_RGBA8;
break;
case QImage::Format_RGB32:
format = GL_RGB8;
break;
default:
return false;
}
if (GLPlatform::instance()->isGLES()) {
if (s_supportsARGB32 && format == GL_RGBA8) {
const QImage im = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
glTexImage2D(m_target, 0, GL_BGRA_EXT, im.width(), im.height(),
0, GL_BGRA_EXT, GL_UNSIGNED_BYTE, im.bits());
} else {
const QImage im = image.convertToFormat(QImage::Format_RGBA8888_Premultiplied);
glTexImage2D(m_target, 0, GL_RGBA, im.width(), im.height(),
0, GL_RGBA, GL_UNSIGNED_BYTE, im.bits());
}
} else {
glTexImage2D(m_target, 0, format, size.width(), size.height(), 0,
GL_BGRA, GL_UNSIGNED_BYTE, image.bits());
}
q->unbind();
q->setYInverted(true);
m_size = size;
updateMatrix();
return true;
}
bool AbstractEglTexture::loadEglTexture(const QPointer< KWayland::Server::BufferInterface > &buffer)
{
if (!eglQueryWaylandBufferWL) {
return false;
}
if (!buffer->resource()) {
return false;
}
glGenTextures(1, &m_texture);
q->setWrapMode(GL_CLAMP_TO_EDGE);
q->setFilter(GL_LINEAR);
q->bind();
m_image = attach(buffer);
q->unbind();
if (EGL_NO_IMAGE_KHR == m_image) {
qCDebug(KWIN_OPENGL) << "failed to create egl image";
q->discard();
return false;
}
return true;
}
EGLImageKHR AbstractEglTexture::attach(const QPointer< KWayland::Server::BufferInterface > &buffer)
{
EGLint format, yInverted;
eglQueryWaylandBufferWL(m_backend->eglDisplay(), buffer->resource(), EGL_TEXTURE_FORMAT, &format);
if (format != EGL_TEXTURE_RGB && format != EGL_TEXTURE_RGBA) {
qCDebug(KWIN_OPENGL) << "Unsupported texture format: " << format;
return EGL_NO_IMAGE_KHR;
}
if (!eglQueryWaylandBufferWL(m_backend->eglDisplay(), buffer->resource(), EGL_WAYLAND_Y_INVERTED_WL, &yInverted)) {
// if EGL_WAYLAND_Y_INVERTED_WL is not supported wl_buffer should be treated as if value were EGL_TRUE
yInverted = EGL_TRUE;
}
const EGLint attribs[] = {
EGL_WAYLAND_PLANE_WL, 0,
EGL_NONE
};
EGLImageKHR image = eglCreateImageKHR(m_backend->eglDisplay(), EGL_NO_CONTEXT, EGL_WAYLAND_BUFFER_WL,
(EGLClientBuffer)buffer->resource(), attribs);
if (image != EGL_NO_IMAGE_KHR) {
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
m_size = buffer->size();
updateMatrix();
q->setYInverted(yInverted);
}
return image;
}
bool AbstractEglTexture::updateFromFBO(const QSharedPointer<QOpenGLFramebufferObject> &fbo)
{
if (fbo.isNull()) {
return false;
}
m_texture = fbo->texture();
m_size = fbo->size();
q->setWrapMode(GL_CLAMP_TO_EDGE);
q->setFilter(GL_LINEAR);
q->setYInverted(false);
updateMatrix();
return true;
}
}
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