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kwin/abstract_egl_backend.cpp
Martin Gräßlin d1de6899fd Move querying the egl extensions into the AbstractEglBackend 
Summary:
Instead of having the egl extensions in the global kwinglutils lib it
becomes private to the AbstractEglBackend. Just like on glx the
glxextensions are moved into the platform.

The extensions are queried from initEglAPI, that is as early as possible
after initializing the EGLDisplay. This ensures that any implementing
subclass can access the extensions early enough.

As a note: the EglOnXBackend had a potentially wrong sequence for
initializing the buffer age extension. It is now moved to the correct
place where the result is needed for the first time.

From the global API eglExtensions are removed from hasGLExtension and
the eglExtensions function is dropped. As by that initEGL did not do
anything it is also dropped.

Test Plan:
Tested nested kwin on Wayland, still works, extensions shown
in debug console

Reviewers: #kwin, #plasma

Subscribers: plasma-devel, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D3396
2016-11-17 13:00:29 +01:00

501 lines
17 KiB
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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 "options.h"
#include "platform.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 <kwinglplatform.h>
// Qt
#include <QOpenGLContext>
#include <QOpenGLFramebufferObject>
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()
: OpenGLBackend()
{
}
AbstractEglBackend::~AbstractEglBackend() = default;
void AbstractEglBackend::unbindWaylandDisplay()
{
auto display = kwinApp()->platform()->sceneEglDisplay();
if (eglUnbindWaylandDisplayWL && display != EGL_NO_DISPLAY) {
eglUnbindWaylandDisplayWL(display, *(WaylandServer::self()->display()));
}
}
void AbstractEglBackend::cleanup()
{
cleanupGL();
doneCurrent();
eglDestroyContext(m_display, m_context);
cleanupSurfaces();
eglReleaseThread();
}
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_CORE) << "eglInitialize failed";
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
qCWarning(KWIN_CORE) << "Error during eglInitialize " << error;
}
return false;
}
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
qCWarning(KWIN_CORE) << "Error during eglInitialize " << error;
return false;
}
qCDebug(KWIN_CORE) << "Egl Initialize succeeded";
if (eglBindAPI(isOpenGLES() ? EGL_OPENGL_ES_API : EGL_OPENGL_API) == EGL_FALSE) {
qCCritical(KWIN_CORE) << "bind OpenGL API failed";
return false;
}
qCDebug(KWIN_CORE) << "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"));
EGLContext ctx = EGL_NO_CONTEXT;
if (isOpenGLES()) {
if (haveCreateContext && haveRobustness) {
const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT, EGL_TRUE,
EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT, EGL_LOSE_CONTEXT_ON_RESET_EXT,
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, context_attribs);
}
if (ctx == EGL_NO_CONTEXT) {
const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, context_attribs);
}
} else {
// Try to create a 3.1 core context
if (options->glCoreProfile() && haveCreateContext) {
if (haveRobustness) {
const int attribs[] = {
EGL_CONTEXT_MAJOR_VERSION_KHR, 3,
EGL_CONTEXT_MINOR_VERSION_KHR, 1,
EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, EGL_LOSE_CONTEXT_ON_RESET_KHR,
EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR,
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, attribs);
}
if (ctx == EGL_NO_CONTEXT) {
// try without robustness
const EGLint attribs[] = {
EGL_CONTEXT_MAJOR_VERSION_KHR, 3,
EGL_CONTEXT_MINOR_VERSION_KHR, 1,
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, attribs);
}
}
if (ctx == EGL_NO_CONTEXT && haveRobustness && haveCreateContext) {
const int attribs[] = {
EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR,
EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, EGL_LOSE_CONTEXT_ON_RESET_KHR,
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, attribs);
}
if (ctx == EGL_NO_CONTEXT) {
// and last but not least: try without robustness
const EGLint attribs[] = {
EGL_NONE
};
ctx = eglCreateContext(m_display, config(), EGL_NO_CONTEXT, attribs);
}
}
if (ctx == EGL_NO_CONTEXT) {
qCCritical(KWIN_CORE) << "Create Context failed";
return false;
}
m_context = ctx;
return true;
}
void AbstractEglBackend::setEglDisplay(const EGLDisplay &display) {
m_display = display;
kwinApp()->platform()->setSceneEglDisplay(display);
}
AbstractEglTexture::AbstractEglTexture(SceneOpenGL::Texture *texture, AbstractEglBackend *backend)
: SceneOpenGL::TexturePrivate()
, 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();
// 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()) {
glTexSubImage2D(m_target, 0, rect.x(), rect.y(), rect.width(), rect.height(),
GL_BGRA_EXT, GL_UNSIGNED_BYTE, im.copy(rect).bits());
}
} else {
const QImage im = image.convertToFormat(QImage::Format_RGBA8888_Premultiplied);
for (const QRect &rect : damage.rects()) {
glTexSubImage2D(m_target, 0, rect.x(), rect.y(), rect.width(), rect.height(),
GL_RGBA, GL_UNSIGNED_BYTE, im.copy(rect).bits());
}
}
} else {
const QImage im = image.convertToFormat(QImage::Format_ARGB32_Premultiplied);
for (const QRect &rect : damage.rects()) {
glTexSubImage2D(m_target, 0, rect.x(), rect.y(), rect.width(), rect.height(),
GL_BGRA, GL_UNSIGNED_BYTE, im.copy(rect).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_CORE) << "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_CORE) << "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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