Initial implementation of EglGbmBackend
Uses EGL_MESA_platform_gbm to get an EglDisplay from a gbm_device. The DrmBackend can provide a DrmBuffer for a gbm_surface and present it. Unfortunately buffer age seems to be slightly broken and we still have artefacts.master
Martin Gräßlin
10 years ago
parent
3a7d0c395e
commit
877c33fe7d
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#.rst:
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# Findgbm
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# -------
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#
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# Try to find gbm on a Unix system.
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#
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# This will define the following variables:
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#
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# ``gbm_FOUND``
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# True if (the requested version of) gbm is available
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# ``gbm_VERSION``
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# The version of gbm
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# ``gbm_LIBRARIES``
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# This can be passed to target_link_libraries() instead of the ``gbm::gbm``
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# target
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# ``gbm_INCLUDE_DIRS``
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# This should be passed to target_include_directories() if the target is not
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# used for linking
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# ``gbm_DEFINITIONS``
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# This should be passed to target_compile_options() if the target is not
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# used for linking
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#
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# If ``gbm_FOUND`` is TRUE, it will also define the following imported target:
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#
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# ``gbm::gbm``
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# The gbm library
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#
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# In general we recommend using the imported target, as it is easier to use.
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# Bear in mind, however, that if the target is in the link interface of an
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# exported library, it must be made available by the package config file.
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#=============================================================================
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# Copyright 2014 Alex Merry <alex.merry@kde.org>
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# Copyright 2014 Martin Gräßlin <mgraesslin@kde.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#=============================================================================
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if(CMAKE_VERSION VERSION_LESS 2.8.12)
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message(FATAL_ERROR "CMake 2.8.12 is required by Findgbm.cmake")
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endif()
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if(CMAKE_MINIMUM_REQUIRED_VERSION VERSION_LESS 2.8.12)
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message(AUTHOR_WARNING "Your project should require at least CMake 2.8.12 to use Findgbm.cmake")
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endif()
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if(NOT WIN32)
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# Use pkg-config to get the directories and then use these values
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# in the FIND_PATH() and FIND_LIBRARY() calls
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find_package(PkgConfig)
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pkg_check_modules(PKG_gbm QUIET gbm)
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set(gbm_DEFINITIONS ${PKG_gbm_CFLAGS_OTHER})
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set(gbm_VERSION ${PKG_gbm_VERSION})
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find_path(gbm_INCLUDE_DIR
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NAMES
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gbm.h
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HINTS
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${PKG_gbm_INCLUDE_DIRS}
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)
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find_library(gbm_LIBRARY
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NAMES
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gbm
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HINTS
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${PKG_gbm_LIBRARY_DIRS}
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)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(gbm
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FOUND_VAR
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gbm_FOUND
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REQUIRED_VARS
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gbm_LIBRARY
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gbm_INCLUDE_DIR
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VERSION_VAR
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gbm_VERSION
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)
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if(gbm_FOUND AND NOT TARGET gbm::gbm)
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add_library(gbm::gbm UNKNOWN IMPORTED)
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set_target_properties(gbm::gbm PROPERTIES
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IMPORTED_LOCATION "${gbm_LIBRARY}"
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INTERFACE_COMPILE_OPTIONS "${gbm_DEFINITIONS}"
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INTERFACE_INCLUDE_DIRECTORIES "${gbm_INCLUDE_DIR}"
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)
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endif()
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mark_as_advanced(gbm_LIBRARY gbm_INCLUDE_DIR)
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# compatibility variables
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set(gbm_LIBRARIES ${gbm_LIBRARY})
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set(gbm_INCLUDE_DIRS ${gbm_INCLUDE_DIR})
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set(gbm_VERSION_STRING ${gbm_VERSION})
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else()
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message(STATUS "Findgbm.cmake cannot find gbm on Windows systems.")
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set(gbm_FOUND FALSE)
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endif()
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include(FeatureSummary)
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set_package_properties(gbm PROPERTIES
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URL "http://www.mesa3d.org"
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DESCRIPTION "Mesa gbm library."
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)
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@ -0,0 +1,276 @@
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "egl_gbm_backend.h"
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// kwin
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#include "composite.h"
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#include "drm_backend.h"
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#include "options.h"
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#include "screens.h"
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// kwin libs
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#include <kwinglplatform.h>
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// Qt
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#include <QOpenGLContext>
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// system
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#include <gbm.h>
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namespace KWin
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{
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EglGbmBackend::EglGbmBackend(DrmBackend *b)
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: QObject(NULL)
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, AbstractEglBackend()
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, m_backend(b)
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{
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initializeEgl();
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init();
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// Egl is always direct rendering
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setIsDirectRendering(true);
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}
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EglGbmBackend::~EglGbmBackend()
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{
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// TODO: cleanup front buffer?
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cleanup();
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if (m_gbmSurface) {
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gbm_surface_destroy(m_gbmSurface);
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}
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if (m_device) {
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gbm_device_destroy(m_device);
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}
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}
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bool EglGbmBackend::initializeEgl()
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{
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initClientExtensions();
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EGLDisplay display = EGL_NO_DISPLAY;
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// Use eglGetPlatformDisplayEXT() to get the display pointer
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// if the implementation supports it.
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if (!hasClientExtension(QByteArrayLiteral("EGL_EXT_platform_base")) ||
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!hasClientExtension(QByteArrayLiteral("EGL_MESA_platform_gbm"))) {
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setFailed("EGL_EXT_platform_base and/or EGL_MESA_platform_gbm missing");
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return false;
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}
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m_device = gbm_create_device(m_backend->fd());
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if (!m_device) {
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setFailed("Could not create gbm device");
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return false;
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}
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display = eglGetPlatformDisplayEXT(EGL_PLATFORM_GBM_MESA, m_device, nullptr);
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if (display == EGL_NO_DISPLAY)
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return false;
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setEglDisplay(display);
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return initEglAPI();
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}
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void EglGbmBackend::init()
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{
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if (!initRenderingContext()) {
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setFailed("Could not initialize rendering context");
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return;
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}
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initKWinGL();
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initBufferAge();
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initWayland();
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}
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bool EglGbmBackend::initRenderingContext()
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{
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initBufferConfigs();
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EGLContext context = EGL_NO_CONTEXT;
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#ifdef KWIN_HAVE_OPENGLES
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const EGLint context_attribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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context = eglCreateContext(eglDisplay(), config(), EGL_NO_CONTEXT, context_attribs);
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#else
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const EGLint context_attribs_31_core[] = {
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EGL_CONTEXT_MAJOR_VERSION_KHR, 3,
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EGL_CONTEXT_MINOR_VERSION_KHR, 1,
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EGL_CONTEXT_FLAGS_KHR, EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR,
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EGL_NONE
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};
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const EGLint context_attribs_legacy[] = {
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EGL_NONE
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};
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const char* eglExtensionsCString = eglQueryString(eglDisplay(), EGL_EXTENSIONS);
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const QList<QByteArray> extensions = QByteArray::fromRawData(eglExtensionsCString, qstrlen(eglExtensionsCString)).split(' ');
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// Try to create a 3.1 core context
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if (options->glCoreProfile() && extensions.contains(QByteArrayLiteral("EGL_KHR_create_context")))
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context = eglCreateContext(eglDisplay(), config(), EGL_NO_CONTEXT, context_attribs_31_core);
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if (context == EGL_NO_CONTEXT)
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context = eglCreateContext(eglDisplay(), config(), EGL_NO_CONTEXT, context_attribs_legacy);
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#endif
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if (context == EGL_NO_CONTEXT) {
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qCCritical(KWIN_CORE) << "Create Context failed";
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return false;
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}
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setContext(context);
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EGLSurface surface = EGL_NO_SURFACE;
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m_gbmSurface = gbm_surface_create(m_device, m_backend->size().width(), m_backend->size().height(),
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GBM_FORMAT_XRGB8888, GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
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if (!m_gbmSurface) {
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qCCritical(KWIN_CORE) << "Create gbm surface failed";
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return false;
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}
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surface = eglCreatePlatformWindowSurfaceEXT(eglDisplay(), config(), (void *) m_gbmSurface, nullptr);
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if (surface == EGL_NO_SURFACE) {
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qCCritical(KWIN_CORE) << "Create Window Surface failed";
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return false;
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}
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setSurface(surface);
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return makeContextCurrent();
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}
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bool EglGbmBackend::makeContextCurrent()
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{
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if (eglMakeCurrent(eglDisplay(), surface(), surface(), context()) == EGL_FALSE) {
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qCCritical(KWIN_CORE) << "Make Context Current failed";
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return false;
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}
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EGLint error = eglGetError();
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if (error != EGL_SUCCESS) {
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qCWarning(KWIN_CORE) << "Error occurred while creating context " << error;
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return false;
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}
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return true;
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}
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bool EglGbmBackend::initBufferConfigs()
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{
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const EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_BLUE_SIZE, 1,
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EGL_ALPHA_SIZE, 0,
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#ifdef KWIN_HAVE_OPENGLES
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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#else
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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#endif
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EGL_CONFIG_CAVEAT, EGL_NONE,
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EGL_NONE,
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};
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EGLint count;
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EGLConfig configs[1024];
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if (eglChooseConfig(eglDisplay(), config_attribs, configs, 1, &count) == EGL_FALSE) {
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qCCritical(KWIN_CORE) << "choose config failed";
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return false;
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}
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if (count != 1) {
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qCCritical(KWIN_CORE) << "choose config did not return a config" << count;
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return false;
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}
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setConfig(configs[0]);
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return true;
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}
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void EglGbmBackend::present()
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{
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eglSwapBuffers(eglDisplay(), surface());
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auto oldBuffer = m_frontBuffer;
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m_frontBuffer = m_backend->createBuffer(m_gbmSurface);
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m_backend->present(m_frontBuffer);
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delete oldBuffer;
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if (supportsBufferAge()) {
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eglQuerySurface(eglDisplay(), surface(), EGL_BUFFER_AGE_EXT, &m_bufferAge);
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}
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}
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void EglGbmBackend::screenGeometryChanged(const QSize &size)
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{
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Q_UNUSED(size)
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// TODO, create new buffer?
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}
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SceneOpenGL::TexturePrivate *EglGbmBackend::createBackendTexture(SceneOpenGL::Texture *texture)
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{
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return new EglGbmTexture(texture, this);
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}
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QRegion EglGbmBackend::prepareRenderingFrame()
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{
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QRegion repaint;
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if (supportsBufferAge())
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repaint = accumulatedDamageHistory(m_bufferAge);
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startRenderTimer();
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return repaint;
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}
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void EglGbmBackend::endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion)
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{
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if (damagedRegion.isEmpty()) {
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// If the damaged region of a window is fully occluded, the only
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// rendering done, if any, will have been to repair a reused back
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// buffer, making it identical to the front buffer.
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//
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// In this case we won't post the back buffer. Instead we'll just
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// set the buffer age to 1, so the repaired regions won't be
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// rendered again in the next frame.
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if (!renderedRegion.isEmpty())
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glFlush();
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m_bufferAge = 1;
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return;
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}
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present();
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// Save the damaged region to history
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if (supportsBufferAge())
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addToDamageHistory(damagedRegion);
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}
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||||||
|
bool EglGbmBackend::usesOverlayWindow() const
|
||||||
|
{
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
/************************************************
|
||||||
|
* EglTexture
|
||||||
|
************************************************/
|
||||||
|
|
||||||
|
EglGbmTexture::EglGbmTexture(KWin::SceneOpenGL::Texture *texture, EglGbmBackend *backend)
|
||||||
|
: AbstractEglTexture(texture, backend)
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
EglGbmTexture::~EglGbmTexture() = default;
|
||||||
|
|
||||||
|
} // namespace
|
||||||
@ -0,0 +1,80 @@
|
|||||||
|
/********************************************************************
|
||||||
|
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/>.
|
||||||
|
*********************************************************************/
|
||||||
|
#ifndef KWIN_EGL_GBM_BACKEND_H
|
||||||
|
#define KWIN_EGL_GBM_BACKEND_H
|
||||||
|
#include "abstract_egl_backend.h"
|
||||||
|
#include "scene_opengl.h"
|
||||||
|
|
||||||
|
struct gbm_device;
|
||||||
|
struct gbm_surface;
|
||||||
|
|
||||||
|
namespace KWin
|
||||||
|
{
|
||||||
|
class DrmBackend;
|
||||||
|
class DrmBuffer;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief OpenGL Backend using Egl on a GBM surface.
|
||||||
|
**/
|
||||||
|
class EglGbmBackend : public QObject, public AbstractEglBackend
|
||||||
|
{
|
||||||
|
Q_OBJECT
|
||||||
|
public:
|
||||||
|
EglGbmBackend(DrmBackend *b);
|
||||||
|
virtual ~EglGbmBackend();
|
||||||
|
void screenGeometryChanged(const QSize &size) override;
|
||||||
|
SceneOpenGL::TexturePrivate *createBackendTexture(SceneOpenGL::Texture *texture) override;
|
||||||
|
QRegion prepareRenderingFrame() override;
|
||||||
|
void endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion) override;
|
||||||
|
bool usesOverlayWindow() const override;
|
||||||
|
|
||||||
|
protected:
|
||||||
|
void present() override;
|
||||||
|
|
||||||
|
private:
|
||||||
|
void init();
|
||||||
|
bool initializeEgl();
|
||||||
|
bool initBufferConfigs();
|
||||||
|
bool initRenderingContext();
|
||||||
|
bool makeContextCurrent();
|
||||||
|
DrmBackend *m_backend;
|
||||||
|
gbm_device *m_device = nullptr;
|
||||||
|
gbm_surface *m_gbmSurface = nullptr;
|
||||||
|
DrmBuffer *m_frontBuffer = nullptr;
|
||||||
|
int m_bufferAge = 0;
|
||||||
|
friend class EglGbmTexture;
|
||||||
|
};
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Texture using an EGLImageKHR.
|
||||||
|
**/
|
||||||
|
class EglGbmTexture : public AbstractEglTexture
|
||||||
|
{
|
||||||
|
public:
|
||||||
|
virtual ~EglGbmTexture();
|
||||||
|
|
||||||
|
private:
|
||||||
|
friend class EglGbmBackend;
|
||||||
|
EglGbmTexture(SceneOpenGL::Texture *texture, EglGbmBackend *backend);
|
||||||
|
};
|
||||||
|
|
||||||
|
} // namespace
|
||||||
|
|
||||||
|
#endif
|
||||||
Loading…
Reference in New Issue