DRM Implementation

Ported sfml-pi DRM/KMS backend written by @mickelson 
Port co-authored by @substring

Co-authored-by: Andrew Mickelson <andrew.mickelson@gmail.com>
Co-authored-by: Gil Delescluse <frog2wah@gmail.com>

.github/workflows/ci.yml

@@ -31,13 +31,17 @@ jobs:
           config: { name: x86, flags: -DCMAKE_ANDROID_ARCH_ABI=x86 -DCMAKE_SYSTEM_NAME=Android -DSFML_BUILD_TEST_SUITE=FALSE -DCMAKE_ANDROID_NDK=$GITHUB_WORKSPACE/android-ndk-r18b -DCMAKE_ANDROID_NDK_TOOLCHAIN_VERSION=clang -DCMAKE_ANDROID_STL_TYPE=c++_shared -DCMAKE_ANDROID_API=26 }
         - platform: { name: Android, os: ubuntu-latest }
           config: { name: armeabi-v7a, flags: -DCMAKE_ANDROID_ARCH_ABI=armeabi-v7a -DCMAKE_SYSTEM_NAME=Android -DSFML_BUILD_TEST_SUITE=FALSE -DCMAKE_ANDROID_NDK=$GITHUB_WORKSPACE/android-ndk-r18b -DCMAKE_ANDROID_NDK_TOOLCHAIN_VERSION=clang -DCMAKE_ANDROID_STL_TYPE=c++_shared -DCMAKE_ANDROID_API=26 }
+        - platform: { name: Linux GCC, os: ubuntu-latest  }
+          config: { name: Static DRM, flags: -DBUILD_SHARED_LIBS=FALSE -DSFML_USE_DRM=TRUE }
+        - platform: { name: Linux GCC, os: ubuntu-latest  }
+          config: { name: Shared DRM, flags: -DBUILD_SHARED_LIBS=TRUE -DSFML_USE_DRM=TRUE }
     steps:
     - name: Checkout Code
       uses: actions/checkout@v2
 
     - name: Install Linux Dependencies
       if: runner.os == 'Linux'
-      run: sudo apt-get update && sudo apt-get install libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev
+      run: sudo apt-get update && sudo apt-get install libxrandr-dev libxcursor-dev libudev-dev libopenal-dev libflac-dev libvorbis-dev libgl1-mesa-dev libegl1-mesa-dev libdrm-dev libgbm-dev
 
 
     - name: Install Android Components

cmake/Modules/FindDRM.cmake

@@ -0,0 +1,18 @@
+#
+# Try to find EGL library and include path.
+# Once done this will define
+#
+# DRM_FOUND
+# DRM_INCLUDE_PATH
+# DRM_LIBRARY
+#
+
+if(PKG_CONFIG_FOUND)
+    pkg_check_modules(PC_DRM drm QUIET)
+endif()
+
+find_path(DRM_INCLUDE_DIR NAMES libdrm/drm.h)
+find_library(DRM_LIBRARY NAMES drm)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(DRM DEFAULT_MSG DRM_LIBRARY DRM_INCLUDE_DIR)

cmake/Modules/FindGBM.cmake

@@ -0,0 +1,18 @@
+#
+# Try to find GBM library and include path.
+# Once done this will define
+#
+# GBM_FOUND
+# GBM_INCLUDE_PATH
+# GBM_LIBRARY
+#
+
+if(PKG_CONFIG_FOUND)
+    pkg_check_modules(PC_GBM gbm QUIET)
+endif()
+
+find_path(GBM_INCLUDE_DIR NAMES gbm.h)
+find_library(GBM_LIBRARY NAMES gbm)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(GBM DEFAULT_MSG GBM_LIBRARY GBM_INCLUDE_DIR)

examples/CMakeLists.txt

@@ -31,7 +31,9 @@ if(SFML_BUILD_GRAPHICS)
     if(SFML_OS_WINDOWS)
         add_subdirectory(win32)
     elseif(SFML_OS_LINUX OR SFML_OS_FREEBSD)
-        add_subdirectory(X11)
+        if(NOT SFML_USE_DRM)
+            add_subdirectory(X11)
+        endif()
     elseif(SFML_OS_MACOSX AND ${CMAKE_GENERATOR} MATCHES "Xcode")
         add_subdirectory(cocoa)
     endif()

extlibs/headers/drm/drm-common.c

@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2017 Rob Clark <rclark@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <inttypes.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <drm-common.h>
+#include <gbm.h>
+
+#define WEAK __attribute__((weak))
+
+WEAK uint64_t gbm_bo_get_modifier(struct gbm_bo *bo);
+WEAK int gbm_bo_get_plane_count(struct gbm_bo *bo);
+WEAK uint32_t gbm_bo_get_stride_for_plane(struct gbm_bo *bo, int plane);
+WEAK uint32_t gbm_bo_get_offset(struct gbm_bo *bo, int plane);
+
+static void drm_fb_destroy_callback(struct gbm_bo *bo, void *data)
+{
+	int drm_fd = gbm_device_get_fd(gbm_bo_get_device(bo));
+	struct drm_fb *fb = data;
+
+	if (fb->fb_id)
+		drmModeRmFB(drm_fd, fb->fb_id);
+
+	free(fb);
+}
+
+struct drm_fb * drm_fb_get_from_bo(struct gbm_bo *bo)
+{
+	int drm_fd = gbm_device_get_fd(gbm_bo_get_device(bo));
+	struct drm_fb *fb = gbm_bo_get_user_data(bo);
+	uint32_t width, height, format,
+		 strides[4] = {0}, handles[4] = {0},
+		 offsets[4] = {0}, flags = 0;
+	int ret = -1;
+
+	if (fb)
+		return fb;
+
+	fb = calloc(1, sizeof *fb);
+	fb->bo = bo;
+
+	width = gbm_bo_get_width(bo);
+	height = gbm_bo_get_height(bo);
+	format = gbm_bo_get_format(bo);
+
+	if (gbm_bo_get_modifier && gbm_bo_get_plane_count &&
+	    gbm_bo_get_stride_for_plane && gbm_bo_get_offset)
+	{
+		uint64_t modifiers[4] = {0};
+		modifiers[0] = gbm_bo_get_modifier(bo);
+		const int num_planes = gbm_bo_get_plane_count(bo);
+		for (int i = 0; i < num_planes; i++)
+		{
+			strides[i] = gbm_bo_get_stride_for_plane(bo, i);
+			handles[i] = gbm_bo_get_handle(bo).u32;
+			offsets[i] = gbm_bo_get_offset(bo, i);
+			modifiers[i] = modifiers[0];
+		}
+
+		if (modifiers[0])
+		{
+			flags = DRM_MODE_FB_MODIFIERS;
+			// printf("Using modifier %" PRIx64 "\n", modifiers[0]);
+		}
+
+		ret = drmModeAddFB2WithModifiers(drm_fd, width, height,
+				format, handles, strides, offsets,
+				modifiers, &fb->fb_id, flags);
+	}
+
+	if (ret)
+	{
+		// if (flags)
+			// fprintf(stderr, "Modifiers failed!\n");
+
+		memcpy(handles, (uint32_t [4]){gbm_bo_get_handle(bo).u32,0,0,0}, 16);
+		memcpy(strides, (uint32_t [4]){gbm_bo_get_stride(bo),0,0,0}, 16);
+		memset(offsets, 0, 16);
+		ret = drmModeAddFB2(drm_fd, width, height, format,
+				handles, strides, offsets, &fb->fb_id, 0);
+	}
+
+	if (ret)
+	{
+		printf("failed to create fb: %s\n", strerror(errno));
+		free(fb);
+		return NULL;
+	}
+
+	gbm_bo_set_user_data(bo, fb, drm_fb_destroy_callback);
+
+	return fb;
+}
+
+static uint32_t find_crtc_for_encoder(const drmModeRes *resources,
+		const drmModeEncoder *encoder)
+{
+
+	for (int i = 0; i < resources->count_crtcs; i++)
+	{
+		/* possible_crtcs is a bitmask as described here:
+		 * https://dvdhrm.wordpress.com/2012/09/13/linux-drm-mode-setting-api
+		 */
+		const uint32_t crtc_mask = 1U << i;
+		const uint32_t crtc_id = resources->crtcs[i];
+		if (encoder->possible_crtcs & crtc_mask)
+		{
+			return crtc_id;
+		}
+	}
+
+	/* no match found */
+	return 0;
+}
+
+static uint32_t find_crtc_for_connector(const struct drm *drm, const drmModeRes *resources, const drmModeConnector *connector)
+{
+	for (int i = 0; i < connector->count_encoders; i++)
+	{
+		const uint32_t encoder_id = connector->encoders[i];
+		drmModeEncoder *encoder = drmModeGetEncoder(drm->fd, encoder_id);
+
+		if (encoder)
+		{
+			const uint32_t crtc_id = find_crtc_for_encoder(resources, encoder);
+
+			drmModeFreeEncoder(encoder);
+			if (crtc_id != 0)
+			{
+				return crtc_id;
+			}
+		}
+	}
+
+	/* no match found */
+	return 0;
+}
+
+static int get_resources(int fd, drmModeRes **resources)
+{
+	*resources = drmModeGetResources(fd);
+	if (*resources == NULL)
+		return -1;
+	return 0;
+}
+
+#define MAX_DRM_DEVICES 64
+
+static int find_drm_device(drmModeRes **resources)
+{
+	drmDevicePtr devices[MAX_DRM_DEVICES] = { NULL };
+	int num_devices, fd = -1;
+
+	num_devices = drmGetDevices2(0, devices, MAX_DRM_DEVICES);
+	if (num_devices < 0)
+	{
+		printf("drmGetDevices2 failed: %s\n", strerror(-num_devices));
+		return -1;
+	}
+
+	for (int i = 0; i < num_devices; i++)
+	{
+		drmDevicePtr device = devices[i];
+		int ret;
+
+		if (!(device->available_nodes & (1 << DRM_NODE_PRIMARY)))
+			continue;
+		/* OK, it's a primary device. If we can get the
+		 * drmModeResources, it means it's also a
+		 * KMS-capable device.
+		 */
+		fd = open(device->nodes[DRM_NODE_PRIMARY], O_RDWR);
+		if (fd < 0)
+			continue;
+		ret = get_resources(fd, resources);
+		if (!ret)
+			break;
+		close(fd);
+		fd = -1;
+	}
+	drmFreeDevices(devices, num_devices);
+
+	if (fd < 0)
+		printf("no drm device found!\n");
+	return fd;
+}
+
+int init_drm(struct drm *drm, const char *device, const char *mode_str,
+		unsigned int vrefresh)
+{
+	drmModeRes *resources;
+	drmModeConnector *connector = NULL;
+	drmModeEncoder *encoder = NULL;
+	int i, ret, area;
+
+	if (device)
+	{
+		drm->fd = open(device, O_RDWR);
+		ret = get_resources(drm->fd, &resources);
+		if (ret < 0 && errno == EOPNOTSUPP)
+			printf("%s does not look like a modeset device\n", device);
+	}
+	else
+	{
+		drm->fd = find_drm_device(&resources);
+	}
+
+	if (drm->fd < 0)
+	{
+		printf("could not open drm device\n");
+		return -1;
+	}
+
+	if (!resources)
+	{
+		printf("drmModeGetResources failed: %s\n", strerror(errno));
+		return -1;
+	}
+
+	/* find a connected connector: */
+	for (i = 0; i < resources->count_connectors; i++)
+	{
+		connector = drmModeGetConnector(drm->fd, resources->connectors[i]);
+		if (connector->connection == DRM_MODE_CONNECTED)
+		{
+			/* it's connected, let's use this! */
+			break;
+		}
+		drmModeFreeConnector(connector);
+		connector = NULL;
+	}
+
+	if (!connector)
+	{
+		/* we could be fancy and listen for hotplug events and wait for
+		 * a connector..
+		 */
+		printf("no connected connector!\n");
+		return -1;
+	}
+
+	/* find user requested mode: */
+	if (mode_str && *mode_str)
+	{
+		for (i = 0; i < connector->count_modes; i++)
+		{
+			drmModeModeInfo *current_mode = &connector->modes[i];
+
+			if (strcmp(current_mode->name, mode_str) == 0)
+			{
+				if (vrefresh == 0 || current_mode->vrefresh == vrefresh)
+				{
+					drm->mode = current_mode;
+					break;
+				}
+			}
+		}
+		if (!drm->mode)
+			printf("requested mode not found, using default mode!\n");
+	}
+
+	/* find preferred mode or the highest resolution mode: */
+	if (!drm->mode)
+	{
+		for (i = 0, area = 0; i < connector->count_modes; i++)
+		{
+			drmModeModeInfo *current_mode = &connector->modes[i];
+
+			if (current_mode->type & DRM_MODE_TYPE_PREFERRED)
+			{
+				drm->mode = current_mode;
+				break;
+			}
+
+			int current_area = current_mode->hdisplay * current_mode->vdisplay;
+			if (current_area > area)
+			{
+				drm->mode = current_mode;
+				area = current_area;
+			}
+		}
+	}
+
+	if (!drm->mode)
+	{
+		printf("could not find mode!\n");
+		return -1;
+	}
+
+	/* find encoder: */
+	for (i = 0; i < resources->count_encoders; i++)
+	{
+		encoder = drmModeGetEncoder(drm->fd, resources->encoders[i]);
+		if (encoder->encoder_id == connector->encoder_id)
+			break;
+		drmModeFreeEncoder(encoder);
+		encoder = NULL;
+	}
+
+	if (encoder)
+	{
+		drm->crtc_id = encoder->crtc_id;
+	}
+	else
+	{
+		uint32_t crtc_id = find_crtc_for_connector(drm, resources, connector);
+		if (crtc_id == 0)
+		{
+			printf("no crtc found!\n");
+			return -1;
+		}
+
+		drm->crtc_id = crtc_id;
+	}
+
+	drmModeFreeResources(resources);
+
+	drm->connector_id = connector->connector_id;
+
+    drm->saved_connector = connector;
+    drm->saved_encoder = encoder;
+
+    // get original display mode so we can restore display mode after program exits
+    drm->original_crtc = drmModeGetCrtc(drm->fd, drm->crtc_id);
+
+	if(getenv("SFML_DRM_DEBUG"))
+	{
+		printf("DRM Mode used: %s@%d\n", drm->mode->name, drm->mode->vrefresh);
+	}
+
+	return 0;
+}

extlibs/headers/drm/drm-common.h

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2017 Rob Clark <rclark@redhat.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _DRM_COMMON_H
+#define _DRM_COMMON_H
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gbm;
+struct egl;
+
+struct plane
+{
+	drmModePlane *plane;
+	drmModeObjectProperties *props;
+	drmModePropertyRes **props_info;
+};
+
+struct crtc
+{
+	drmModeCrtc *crtc;
+	drmModeObjectProperties *props;
+	drmModePropertyRes **props_info;
+};
+
+struct connector
+{
+	drmModeConnector *connector;
+	drmModeObjectProperties *props;
+	drmModePropertyRes **props_info;
+};
+
+struct drm
+{
+	int fd;
+
+	drmModeModeInfo *mode;
+	uint32_t crtc_id;
+	uint32_t connector_id;
+
+    drmModeCrtcPtr original_crtc;
+
+    drmModeConnectorPtr saved_connector;
+    drmModeEncoderPtr saved_encoder;
+};
+
+struct drm_fb
+{
+	struct gbm_bo *bo;
+	uint32_t fb_id;
+};
+
+struct drm_fb * drm_fb_get_from_bo(struct gbm_bo *bo);
+
+int init_drm(struct drm *drm, const char *device, const char *mode_str, unsigned int vrefresh);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _DRM_COMMON_H */

src/SFML/Window/CMakeLists.txt

@@ -82,28 +82,44 @@ if(SFML_OS_WINDOWS)
     # make sure that we use the Unicode version of the Win API functions
     add_definitions(-DUNICODE -D_UNICODE)
 elseif(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_OPENBSD OR SFML_OS_NETBSD)
-    set(PLATFORM_SRC
+    if(SFML_USE_DRM)
-        ${SRCROOT}/Unix/CursorImpl.hpp
+        add_definitions(-DSFML_USE_DRM)
-        ${SRCROOT}/Unix/CursorImpl.cpp
-        ${SRCROOT}/Unix/ClipboardImpl.hpp
-        ${SRCROOT}/Unix/ClipboardImpl.cpp
-        ${SRCROOT}/Unix/Display.cpp
-        ${SRCROOT}/Unix/Display.hpp
-        ${SRCROOT}/Unix/InputImpl.cpp
-        ${SRCROOT}/Unix/InputImpl.hpp
-        ${SRCROOT}/Unix/SensorImpl.cpp
-        ${SRCROOT}/Unix/SensorImpl.hpp
-        ${SRCROOT}/Unix/VideoModeImpl.cpp
-        ${SRCROOT}/Unix/VulkanImplX11.cpp
-        ${SRCROOT}/Unix/VulkanImplX11.hpp
-        ${SRCROOT}/Unix/WindowImplX11.cpp
-        ${SRCROOT}/Unix/WindowImplX11.hpp
-    )
-    if(NOT SFML_OS_ANDROID)
         set(PLATFORM_SRC
             ${PLATFORM_SRC}
+            ${SRCROOT}/DRM/CursorImpl.hpp
+            ${SRCROOT}/DRM/CursorImpl.cpp
+            ${SRCROOT}/DRM/ClipboardImpl.hpp
+            ${SRCROOT}/DRM/ClipboardImpl.cpp
+            ${SRCROOT}/Unix/SensorImpl.cpp
+            ${SRCROOT}/Unix/SensorImpl.hpp
+            ${SRCROOT}/DRM/InputImplUDev.cpp
+            ${SRCROOT}/DRM/InputImplUDev.hpp
+            ${SRCROOT}/DRM/VideoModeImpl.cpp
+            ${SRCROOT}/DRM/DRMContext.cpp
+            ${SRCROOT}/DRM/DRMContext.hpp
+            ${SRCROOT}/DRM/WindowImplDRM.cpp
+            ${SRCROOT}/DRM/WindowImplDRM.hpp
+        )
+    else()
+        set(PLATFORM_SRC
+            ${PLATFORM_SRC}
+            ${SRCROOT}/Unix/CursorImpl.hpp
+            ${SRCROOT}/Unix/CursorImpl.cpp
+            ${SRCROOT}/Unix/ClipboardImpl.hpp
+            ${SRCROOT}/Unix/ClipboardImpl.cpp
+            ${SRCROOT}/Unix/InputImpl.cpp
+            ${SRCROOT}/Unix/InputImpl.hpp
+            ${SRCROOT}/Unix/SensorImpl.cpp
+            ${SRCROOT}/Unix/SensorImpl.hpp
+            ${SRCROOT}/Unix/Display.cpp
+            ${SRCROOT}/Unix/Display.hpp
             ${SRCROOT}/Unix/GlxContext.cpp
             ${SRCROOT}/Unix/GlxContext.hpp
+            ${SRCROOT}/Unix/VideoModeImpl.cpp
+            ${SRCROOT}/Unix/VulkanImplX11.cpp
+            ${SRCROOT}/Unix/VulkanImplX11.hpp
+            ${SRCROOT}/Unix/WindowImplX11.cpp
+            ${SRCROOT}/Unix/WindowImplX11.hpp
         )
     endif()
     if(SFML_OS_LINUX)
@@ -236,6 +252,21 @@ endif()
 # define the sfml-window target
 sfml_add_library(sfml-window
                  SOURCES ${SRC} ${PLATFORM_SRC})
+# DRM libraries
+if(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_OPENBSD OR SFML_OS_NETBSD)
+    if(SFML_USE_DRM)
+        target_sources(sfml-window PRIVATE $<TARGET_OBJECTS:drm-common>)
+        sfml_find_package(DRM INCLUDE "DRM_INCLUDE_DIR" LINK "DRM_LIBRARY")
+        target_include_directories(sfml-window PRIVATE ${PROJECT_SOURCE_DIR}/extlibs/headers/drm ${DRM_INCLUDE_DIR}/libdrm)
+        sfml_find_package(GBM INCLUDE "GBM_INCLUDE_DIR" LINK "GBM_LIBRARY")
+        target_link_libraries(sfml-window PRIVATE drm gbm EGL)
+        add_library(drm-common OBJECT ${PROJECT_SOURCE_DIR}/extlibs/headers/drm/drm-common.c)
+        target_include_directories(drm-common PRIVATE ${PROJECT_SOURCE_DIR}/extlibs/headers/drm ${DRM_INCLUDE_DIR}/libdrm)
+    else()
+        sfml_find_package(X11 INCLUDE "X11_INCLUDE_DIR" LINK "X11_X11_LIB" "X11_Xrandr_LIB" "X11_Xcursor_LIB")
+        target_link_libraries(sfml-window PRIVATE X11)
+    endif()
+endif()
 target_link_libraries(sfml-window PUBLIC sfml-system)
 
 # glad sources
@@ -249,12 +280,6 @@ endif()
 # Vulkan headers
 target_include_directories(sfml-window PRIVATE "${PROJECT_SOURCE_DIR}/extlibs/headers/vulkan")
 
-# find and setup usage for external libraries
-if(SFML_OS_LINUX OR SFML_OS_FREEBSD OR SFML_OS_OPENBSD OR SFML_OS_NETBSD)
-    sfml_find_package(X11 INCLUDE "X11_INCLUDE_DIR" LINK "X11_X11_LIB" "X11_Xrandr_LIB" "X11_Xcursor_LIB")
-    target_link_libraries(sfml-window PRIVATE X11)
-endif()
-
 # CMake 3.11 and later prefer to choose GLVND, but we choose legacy OpenGL for backward compability
 # (unless the OpenGL_GL_PREFERENCE was explicitly set)
 # See CMP0072 for more details (cmake --help-policy CMP0072)
@@ -268,7 +293,6 @@ if(SFML_OS_IOS)
     target_link_libraries(sfml-window PRIVATE GLES)
 elseif(SFML_OS_ANDROID)
     sfml_find_package(GLES INCLUDE "GLES_INCLUDE_DIR" LINK "GLES_LIBRARY")
-    
     sfml_find_package(EGL INCLUDE "EGL_INCLUDE_DIR" LINK "EGL_LIBRARY")
     target_link_libraries(sfml-window PRIVATE EGL)
     target_link_libraries(sfml-window PRIVATE GLES)

src/SFML/Window/ClipboardImpl.hpp

@@ -33,7 +33,11 @@
 #if defined(SFML_SYSTEM_WINDOWS)
     #include <SFML/Window/Win32/ClipboardImpl.hpp>
 #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD) || defined(SFML_SYSTEM_NETBSD)
-    #include <SFML/Window/Unix/ClipboardImpl.hpp>
+    #if defined(SFML_USE_DRM)
+        #include <SFML/Window/DRM/ClipboardImpl.hpp>
+    #else
+        #include <SFML/Window/Unix/ClipboardImpl.hpp>
+    #endif
 #elif defined(SFML_SYSTEM_MACOS)
     #include <SFML/Window/OSX/ClipboardImpl.hpp>
 #elif defined(SFML_SYSTEM_IOS)

src/SFML/Window/CursorImpl.hpp

@@ -31,25 +31,19 @@
 #include <SFML/Config.hpp>
 
 #if defined(SFML_SYSTEM_WINDOWS)
-
     #include <SFML/Window/Win32/CursorImpl.hpp>
-
 #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD) || defined(SFML_SYSTEM_NETBSD)
-
+    #if defined(SFML_USE_DRM)
-    #include <SFML/Window/Unix/CursorImpl.hpp>
+        #include <SFML/Window/DRM/CursorImpl.hpp>
-
+    #else
+        #include <SFML/Window/Unix/CursorImpl.hpp>
+    #endif
 #elif defined(SFML_SYSTEM_MACOS)
-
     #include <SFML/Window/OSX/CursorImpl.hpp>
-
 #elif defined(SFML_SYSTEM_IOS)
-
     #include <SFML/Window/iOS/CursorImpl.hpp>
-
 #elif defined(SFML_SYSTEM_ANDROID)
-
     #include <SFML/Window/Android/CursorImpl.hpp>
-
 #endif
 
 

src/SFML/Window/DRM/ClipboardImpl.cpp

@@ -0,0 +1,49 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2022 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/DRM/ClipboardImpl.hpp>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+String ClipboardImpl::getString()
+{
+    return "";
+}
+
+
+////////////////////////////////////////////////////////////
+void ClipboardImpl::setString(const String& /*text*/)
+{
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/ClipboardImpl.hpp

@@ -0,0 +1,76 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2022 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_CLIPBOARDIMPLDRM_HPP
+#define SFML_CLIPBOARDIMPLDRM_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/System/String.hpp>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+/// \brief Give access to the system clipboard
+///
+////////////////////////////////////////////////////////////
+class ClipboardImpl
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the content of the clipboard as string data
+    ///
+    /// This function returns the content of the clipboard
+    /// as a string. If the clipboard does not contain string
+    /// it returns an empty sf::String object.
+    ///
+    /// \return Current content of the clipboard
+    ///
+    ////////////////////////////////////////////////////////////
+    static String getString();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Set the content of the clipboard as string data
+    ///
+    /// This function sets the content of the clipboard as a
+    /// string.
+    ///
+    /// \param text sf::String object containing the data to be sent
+    /// to the clipboard
+    ///
+    ////////////////////////////////////////////////////////////
+    static void setString(const String& text);
+};
+
+} // namespace priv
+
+} // namespace sf
+
+
+#endif // SFML_CLIPBOARDIMPLDRM_HPP

src/SFML/Window/DRM/CursorImpl.cpp

@@ -0,0 +1,90 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2022 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/DRM/CursorImpl.hpp>
+#include <vector>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+CursorImpl::CursorImpl()
+{
+}
+
+
+////////////////////////////////////////////////////////////
+CursorImpl::~CursorImpl()
+{
+}
+
+
+////////////////////////////////////////////////////////////
+bool CursorImpl::loadFromPixels(const Uint8* /*pixels*/, Vector2u /*size*/, Vector2u /*hotspot*/)
+{
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+bool CursorImpl::loadFromPixelsARGB(const Uint8* /*pixels*/, Vector2u /*size*/, Vector2u /*hotspot*/)
+{
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+bool CursorImpl::loadFromPixelsMonochrome(const Uint8* /*pixels*/, Vector2u /*size*/, Vector2u /*hotspot*/)
+{
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+bool CursorImpl::loadFromSystem(Cursor::Type /*type*/)
+{
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+bool CursorImpl::isColorCursorSupported()
+{
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+void CursorImpl::release()
+{
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/CursorImpl.hpp

@@ -0,0 +1,119 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2007-2022 Laurent Gomila (laurent@sfml-dev.org)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_CURSORIMPLDRM_HPP
+#define SFML_CURSORIMPLDRM_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/Cursor.hpp>
+#include <SFML/System/NonCopyable.hpp>
+#include <SFML/System/Vector2.hpp>
+#include <SFML/Window/WindowStyle.hpp> // Prevent conflict with macro None from Xlib
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+/// \brief Unix implementation of Cursor
+///
+////////////////////////////////////////////////////////////
+class CursorImpl : NonCopyable
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Default constructor
+    ///
+    /// Refer to sf::Cursor::Cursor().
+    ///
+    ////////////////////////////////////////////////////////////
+    CursorImpl();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Destructor
+    ///
+    /// Refer to sf::Cursor::~Cursor().
+    ///
+    ////////////////////////////////////////////////////////////
+    ~CursorImpl();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a cursor with the provided image
+    ///
+    /// Refer to sf::Cursor::loadFromPixels().
+    ///
+    ////////////////////////////////////////////////////////////
+    bool loadFromPixels(const Uint8* pixels, Vector2u size, Vector2u hotspot);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a native system cursor
+    ///
+    /// Refer to sf::Cursor::loadFromSystem().
+    ///
+    ////////////////////////////////////////////////////////////
+    bool loadFromSystem(Cursor::Type type);
+
+private:
+
+    friend class WindowImplDRM;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Checks if colored cursors are supported for this display.
+    ///
+    ////////////////////////////////////////////////////////////
+    bool isColorCursorSupported();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a cursor with the provided image (ARGB support)
+    ///
+    /// Refer to sf::Cursor::loadFromPixels().
+    ///
+    ////////////////////////////////////////////////////////////
+    bool loadFromPixelsARGB(const Uint8* pixels, Vector2u size, Vector2u hotspot);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a cursor with the provided image (monochrome)
+    ///
+    /// Refer to sf::Cursor::loadFromPixels().
+    ///
+    ////////////////////////////////////////////////////////////
+    bool loadFromPixelsMonochrome(const Uint8* pixels, Vector2u size, Vector2u hotspot);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Release the cursor, if we have loaded one.
+    ///
+    ////////////////////////////////////////////////////////////
+    void release();
+};
+
+} // namespace priv
+
+} // namespace sf
+
+
+#endif // SFML_CUSROSIMPLDRM_HPP

src/SFML/Window/DRM/DRMContext.cpp

@@ -0,0 +1,555 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2020 Andrew Mickelson
+//               2013 Jonathan De Wachter (dewachter.jonathan@gmail.com)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/DRM/DRMContext.hpp>
+#include <SFML/Window/DRM/WindowImplDRM.hpp>
+#include <SFML/OpenGL.hpp>
+#include <SFML/System/Err.hpp>
+#include <SFML/System/Sleep.hpp>
+#include <cerrno>
+#include <cstdlib>
+#include <cstring>
+#include <poll.h>
+#include <unistd.h>
+
+namespace
+{
+    bool initialized = false;
+    drm drmNode;
+    drmEventContext drmEventCtx;
+    pollfd pollFD;
+    gbm_device* gbmDevice = NULL;
+    int contextCount = 0;
+    EGLDisplay display = EGL_NO_DISPLAY;
+    int waitingForFlip = 0;
+
+    static void pageFlipHandler(int fd, unsigned int frame,
+        unsigned int sec, unsigned int usec, void* data)
+    {
+        // suppress unused param warning
+        (void)fd, (void)frame, (void)sec, (void)usec;
+
+        int* temp = static_cast<int*>(data);
+        *temp = 0;
+    }
+
+    static bool waitForFlip(int timeout)
+    {
+        while (waitingForFlip)
+        {
+            pollFD.revents = 0;
+
+            if (poll(&pollFD, 1, timeout) < 0)
+                return false;
+
+            if (pollFD.revents & (POLLHUP | POLLERR))
+                return false;
+
+            if (pollFD.revents & POLLIN)
+            {
+                drmHandleEvent(drmNode.fd, &drmEventCtx);
+            }
+            else
+            {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    void cleanup()
+    {
+        if (!initialized)
+            return;
+
+        drmModeSetCrtc(drmNode.fd,
+                       drmNode.original_crtc->crtc_id,
+                       drmNode.original_crtc->buffer_id,
+                       drmNode.original_crtc->x,
+                       drmNode.original_crtc->y,
+                       &drmNode.connector_id,
+                       1,
+                       &drmNode.original_crtc->mode);
+
+        drmModeFreeConnector(drmNode.saved_connector);
+        drmModeFreeEncoder(drmNode.saved_encoder);
+        drmModeFreeCrtc(drmNode.original_crtc);
+
+        eglTerminate(display);
+        display = EGL_NO_DISPLAY;
+
+        gbm_device_destroy(gbmDevice);
+        gbmDevice = NULL;
+
+        close(drmNode.fd);
+
+        drmNode.fd = -1;
+        drmNode.mode = 0;
+
+        std::memset(&pollFD, 0, sizeof(pollfd));
+        std::memset(&drmEventCtx, 0, sizeof(drmEventContext));
+
+        waitingForFlip = 0;
+
+        initialized = false;
+    }
+
+    void checkInit()
+    {
+        if (initialized)
+            return;
+
+        // Use environment variable "SFML_DRM_DEVICE" (or NULL if not set)
+        char* deviceString = std::getenv("SFML_DRM_DEVICE");
+        if (deviceString && !*deviceString)
+            deviceString = NULL;
+
+        // Use environment variable "SFML_DRM_MODE" (or NULL if not set)
+        char* modeString = std::getenv("SFML_DRM_MODE");
+
+        // Use environment variable "SFML_DRM_REFRESH" (or 0 if not set)
+        // Use in combination with mode to request specific refresh rate for the mode
+        // if multiple refresh rates for same mode might be supported
+        unsigned int refreshRate = 0;
+        char* refreshString = std::getenv("SFML_DRM_REFRESH");
+
+        if (refreshString)
+            refreshRate = static_cast<unsigned int>(atoi(refreshString));
+
+        if (init_drm(&drmNode,
+                     deviceString,     // device
+                     modeString,       // requested mode
+                     refreshRate) < 0) // screen refresh rate
+        {
+            sf::err() << "Error initializing DRM" << std::endl;
+            return;
+        }
+
+        gbmDevice = gbm_create_device(drmNode.fd);
+
+        std::atexit(cleanup);
+        initialized = true;
+
+        pollFD.fd = drmNode.fd;
+        pollFD.events = POLLIN;
+        drmEventCtx.version = 2;
+        drmEventCtx.page_flip_handler = pageFlipHandler;
+    }
+
+
+    EGLDisplay getInitializedDisplay()
+    {
+        checkInit();
+
+        if (display == EGL_NO_DISPLAY)
+        {
+            display = eglCheck(eglGetDisplay(reinterpret_cast<EGLNativeDisplayType>(gbmDevice)));
+
+            EGLint major, minor;
+            eglCheck(eglInitialize(display, &major, &minor));
+
+#if defined(SFML_OPENGL_ES)
+            if (!eglBindAPI(EGL_OPENGL_ES_API))
+            {
+                sf::err() << "failed to bind api EGL_OPENGL_ES_API" << std::endl;
+            }
+#else
+            if (!eglBindAPI(EGL_OPENGL_API))
+            {
+                sf::err() << "failed to bind api EGL_OPENGL_API" << std::endl;
+            }
+#endif
+        }
+
+        return display;
+    }
+}
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+DRMContext::DRMContext(DRMContext* shared) :
+m_display    (EGL_NO_DISPLAY),
+m_context    (EGL_NO_CONTEXT),
+m_surface    (EGL_NO_SURFACE),
+m_config     (NULL),
+m_currentBO  (NULL),
+m_nextBO     (NULL),
+m_gbmSurface (NULL),
+m_width      (0),
+m_height     (0),
+m_shown      (false),
+m_scanOut    (false)
+{
+    contextCount++;
+
+    // Get the initialized EGL display
+    m_display = getInitializedDisplay();
+
+    // Get the best EGL config matching the default video settings
+    m_config = getBestConfig(m_display, VideoMode::getDesktopMode().bitsPerPixel, ContextSettings());
+    updateSettings();
+
+    // Create EGL context
+    createContext(shared);
+
+    if (shared)
+        createSurface(shared->m_width, shared->m_height, VideoMode::getDesktopMode().bitsPerPixel, false);
+    else // create a surface to force the GL to initialize (seems to be required for glGetString() etc )
+        createSurface(1, 1, VideoMode::getDesktopMode().bitsPerPixel, false);
+}
+
+
+////////////////////////////////////////////////////////////
+DRMContext::DRMContext(DRMContext* shared, const ContextSettings& settings, const WindowImpl* owner, unsigned int bitsPerPixel) :
+m_display    (EGL_NO_DISPLAY),
+m_context    (EGL_NO_CONTEXT),
+m_surface    (EGL_NO_SURFACE),
+m_config     (NULL),
+m_currentBO  (NULL),
+m_nextBO     (NULL),
+m_gbmSurface (NULL),
+m_width      (0),
+m_height     (0),
+m_shown      (false),
+m_scanOut    (false)
+{
+    contextCount++;
+
+    // Get the initialized EGL display
+    m_display = getInitializedDisplay();
+
+    // Get the best EGL config matching the requested video settings
+    m_config = getBestConfig(m_display, bitsPerPixel, settings);
+    updateSettings();
+
+    // Create EGL context
+    createContext(shared);
+
+    if (owner)
+    {
+        Vector2u size = owner->getSize();
+        createSurface(size.x, size.y, bitsPerPixel, true);
+    }
+}
+
+
+////////////////////////////////////////////////////////////
+DRMContext::DRMContext(DRMContext* shared, const ContextSettings& settings, unsigned int width, unsigned int height) :
+m_display    (EGL_NO_DISPLAY),
+m_context    (EGL_NO_CONTEXT),
+m_surface    (EGL_NO_SURFACE),
+m_config     (NULL),
+m_currentBO  (NULL),
+m_nextBO     (NULL),
+m_gbmSurface (NULL),
+m_width      (0),
+m_height     (0),
+m_shown      (false),
+m_scanOut    (false)
+{
+    contextCount++;
+
+    // Get the initialized EGL display
+    m_display = getInitializedDisplay();
+
+    // Get the best EGL config matching the requested video settings
+    m_config = getBestConfig(m_display, VideoMode::getDesktopMode().bitsPerPixel, settings);
+    updateSettings();
+
+    // Create EGL context
+    createContext(shared);
+    createSurface(width, height, VideoMode::getDesktopMode().bitsPerPixel, false);
+}
+
+
+////////////////////////////////////////////////////////////
+DRMContext::~DRMContext()
+{
+    // Deactivate the current context
+    EGLContext currentContext = eglCheck(eglGetCurrentContext());
+
+    if (currentContext == m_context)
+    {
+        eglCheck(eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
+    }
+
+    // Destroy context
+    if (m_context != EGL_NO_CONTEXT)
+    {
+        eglCheck(eglDestroyContext(m_display, m_context));
+        m_context = EGL_NO_CONTEXT;
+    }
+
+    // Destroy surface
+    if (m_surface != EGL_NO_SURFACE)
+    {
+        eglCheck(eglDestroySurface(m_display, m_surface));
+        m_surface = EGL_NO_SURFACE;
+    }
+
+    if (m_currentBO)
+        gbm_surface_release_buffer(m_gbmSurface, m_currentBO);
+
+    if (m_nextBO)
+        gbm_surface_release_buffer(m_gbmSurface, m_nextBO);
+
+    if (m_gbmSurface)
+        gbm_surface_destroy(m_gbmSurface);
+
+    contextCount--;
+    if (contextCount == 0)
+        cleanup();
+}
+
+
+////////////////////////////////////////////////////////////
+bool DRMContext::makeCurrent(bool current)
+{
+    const EGLSurface surface = current ? m_surface : EGL_NO_SURFACE;
+    const EGLContext context = current ? m_context : EGL_NO_CONTEXT;
+    return m_surface != EGL_NO_SURFACE && eglMakeCurrent(m_display, surface, surface, context);
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::display()
+{
+    if (m_surface == EGL_NO_SURFACE)
+        return;
+
+    if (!m_scanOut)
+    {
+        eglCheck(eglSwapBuffers(m_display, m_surface));
+        return;
+    }
+
+    // Handle display of buffer to the screen
+    drm_fb* fb = NULL;
+
+    if (!waitForFlip(-1))
+        return;
+
+    if (m_currentBO)
+    {
+        gbm_surface_release_buffer(m_gbmSurface, m_currentBO);
+        m_currentBO = NULL;
+    }
+
+    eglCheck(eglSwapBuffers(m_display, m_surface));
+
+    m_currentBO = m_nextBO;
+
+    // This call must be preceeded by a single call to eglSwapBuffers()
+    m_nextBO = gbm_surface_lock_front_buffer(m_gbmSurface);
+
+    if (!m_nextBO)
+        return;
+
+    fb = drm_fb_get_from_bo(m_nextBO);
+    if (!fb)
+    {
+        err() << "Failed to get FB from buffer object" << std::endl;
+        return;
+    }
+
+    // If first time, need to first call drmModeSetCrtc()
+    if (!m_shown)
+    {
+        if (drmModeSetCrtc(drmNode.fd, drmNode.crtc_id, fb->fb_id, 0, 0,
+            &drmNode.connector_id, 1, drmNode.mode))
+        {
+            err() << "Failed to set mode: " << std::strerror(errno) << std::endl;
+            std::abort();
+        }
+        m_shown = true;
+    }
+
+    // Do page flip
+    if (!drmModePageFlip(drmNode.fd, drmNode.crtc_id, fb->fb_id,
+            DRM_MODE_PAGE_FLIP_EVENT, &waitingForFlip))
+        waitingForFlip = 1;
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::setVerticalSyncEnabled(bool enabled)
+{
+    eglCheck(eglSwapInterval(m_display, enabled ? 1 : 0));
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::createContext(DRMContext* shared)
+{
+    const EGLint contextVersion[] =
+    {
+        EGL_CONTEXT_CLIENT_VERSION, 1,
+        EGL_NONE
+    };
+
+    EGLContext toShared;
+
+    if (shared)
+        toShared = shared->m_context;
+    else
+        toShared = EGL_NO_CONTEXT;
+
+    if (toShared != EGL_NO_CONTEXT)
+        eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
+    // Create EGL context
+    m_context = eglCheck(eglCreateContext(m_display, m_config, toShared, contextVersion));
+    if (m_context == EGL_NO_CONTEXT)
+        err() << "Failed to create EGL context" << std::endl;
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::createSurface(unsigned int width, unsigned int height, unsigned int /*bpp*/, bool scanout)
+{
+    sf::Uint32 flags = GBM_BO_USE_RENDERING;
+
+    m_scanOut = scanout;
+    if (m_scanOut)
+        flags |= GBM_BO_USE_SCANOUT;
+
+    m_gbmSurface = gbm_surface_create(
+        gbmDevice,
+        width,
+        height,
+        GBM_FORMAT_ARGB8888,
+        flags);
+
+    if (!m_gbmSurface)
+    {
+        err() << "Failed to create gbm surface." << std::endl;
+        return;
+    }
+
+    m_width = width;
+    m_height = height;
+
+    m_surface = eglCheck(eglCreateWindowSurface(m_display, m_config, reinterpret_cast<EGLNativeWindowType>(m_gbmSurface), NULL));
+
+    if (m_surface == EGL_NO_SURFACE)
+    {
+        err() << "Failed to create EGL Surface" << std::endl;
+    }
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::destroySurface()
+{
+    eglCheck(eglDestroySurface(m_display, m_surface));
+    m_surface = EGL_NO_SURFACE;
+
+    gbm_surface_destroy(m_gbmSurface);
+    m_gbmSurface = NULL;
+
+    // Ensure that this context is no longer active since our surface is now destroyed
+    setActive(false);
+}
+
+
+////////////////////////////////////////////////////////////
+EGLConfig DRMContext::getBestConfig(EGLDisplay display, unsigned int bitsPerPixel, const ContextSettings& settings)
+{
+    // Set our video settings constraint
+    const EGLint attributes[] =
+    {
+        EGL_BUFFER_SIZE, static_cast<EGLint>(bitsPerPixel),
+        EGL_DEPTH_SIZE, static_cast<EGLint>(settings.depthBits),
+        EGL_STENCIL_SIZE, static_cast<EGLint>(settings.stencilBits),
+        EGL_SAMPLE_BUFFERS, static_cast<EGLint>(settings.antialiasingLevel),
+        EGL_BLUE_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_RED_SIZE, 8,
+        EGL_ALPHA_SIZE, 8,
+
+        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+#if defined(SFML_OPENGL_ES)
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT,
+#else
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+#endif
+        EGL_NONE
+    };
+
+    EGLint configCount;
+    EGLConfig configs[1];
+
+    // Ask EGL for the best config matching our video settings
+    eglCheck(eglChooseConfig(display, attributes, configs, 1, &configCount));
+
+    return configs[0];
+}
+
+
+////////////////////////////////////////////////////////////
+void DRMContext::updateSettings()
+{
+    EGLint tmp;
+
+    // Update the internal context settings with the current config
+    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_DEPTH_SIZE, &tmp));
+    m_settings.depthBits = static_cast<unsigned int>(tmp);
+
+    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_STENCIL_SIZE, &tmp));
+    m_settings.stencilBits = static_cast<unsigned int>(tmp);
+
+    eglCheck(eglGetConfigAttrib(m_display, m_config, EGL_SAMPLES, &tmp));
+    m_settings.antialiasingLevel = static_cast<unsigned int>(tmp);
+
+    m_settings.majorVersion = 1;
+    m_settings.minorVersion = 1;
+    m_settings.attributeFlags = ContextSettings::Default;
+}
+
+
+////////////////////////////////////////////////////////////
+GlFunctionPointer DRMContext::getFunction(const char* name)
+{
+    return reinterpret_cast<GlFunctionPointer>(eglGetProcAddress(name));
+}
+
+
+////////////////////////////////////////////////////////////
+drm* DRMContext::getDRM()
+{
+    checkInit();
+    return &drmNode;
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/DRMContext.hpp

@@ -0,0 +1,214 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2020 Andrew Mickelson
+//               2013 Jonathan De Wachter (dewachter.jonathan@gmail.com)
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_DRMCONTEXT_HPP
+#define SFML_DRMCONTEXT_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/ContextSettings.hpp>
+#include <SFML/Window/EGLCheck.hpp>
+#include <SFML/Window/GlContext.hpp>
+#include <SFML/Window/VideoMode.hpp>
+#include <SFML/OpenGL.hpp>
+#include <drm-common.h>
+#define EGL_NO_X11
+#define MESA_EGL_NO_X11_HEADERS
+#include <EGL/egl.h>
+#include <gbm.h>
+#include <xf86drmMode.h>
+
+
+namespace sf
+{
+namespace priv
+{
+class WindowImplDRM;
+
+class DRMContext : public GlContext
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a new context, not associated to a window
+    ///
+    /// \param shared Context to share the new one with (can be NULL)
+    ///
+    ////////////////////////////////////////////////////////////
+    DRMContext(DRMContext* shared);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a new context attached to a window
+    ///
+    /// \param shared       Context to share the new one with
+    /// \param settings     Creation parameters
+    /// \param owner        Pointer to the owner window
+    /// \param bitsPerPixel Pixel depth, in bits per pixel
+    ///
+    ////////////////////////////////////////////////////////////
+    DRMContext(DRMContext* shared, const ContextSettings& settings, const WindowImpl* owner, unsigned int bitsPerPixel);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create a new context that embeds its own rendering target
+    ///
+    /// \param shared   Context to share the new one with
+    /// \param settings Creation parameters
+    /// \param width    Back buffer width, in pixels
+    /// \param height   Back buffer height, in pixels
+    ///
+    ////////////////////////////////////////////////////////////
+    DRMContext(DRMContext* shared, const ContextSettings& settings, unsigned int width, unsigned int height);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Destructor
+    ///
+    ////////////////////////////////////////////////////////////
+    ~DRMContext();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Activate the context as the current target
+    ///        for rendering
+    ///
+    /// \param current Whether to make the context current or no longer current
+    ///
+    /// \return True on success, false if any error happened
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual bool makeCurrent(bool current);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Display what has been rendered to the context so far
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void display();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Enable or disable vertical synchronization
+    ///
+    /// Activating vertical synchronization will limit the number
+    /// of frames displayed to the refresh rate of the monitor.
+    /// This can avoid some visual artifacts, and limit the framerate
+    /// to a good value (but not constant across different computers).
+    ///
+    /// \param enabled: True to enable v-sync, false to deactivate
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setVerticalSyncEnabled(bool enabled);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create the EGL context
+    ///
+    /// \param shared       Context to share the new one with (can be NULL)
+    /// \param bitsPerPixel Pixel depth, in bits per pixel
+    /// \param settings     Creation parameters
+    ///
+    ////////////////////////////////////////////////////////////
+    void createContext(DRMContext* shared);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create the EGL surface
+    ///
+    /// \param width   Back buffer width, in pixels
+    /// \param height  Back buffer height, in pixels
+    /// \param bpp     Pixel depth, in bits per pixel
+    /// \param scanout True to present the surface to the screen
+    ///
+    ////////////////////////////////////////////////////////////
+    void createSurface(unsigned int width, unsigned int height, unsigned int bpp, bool scanout);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Destroy the EGL surface
+    ///
+    /// This function must be called when the activity is stopped, or
+    /// when the orientation change.
+    ///
+    ////////////////////////////////////////////////////////////
+    void destroySurface();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the best EGL visual for a given set of video settings
+    ///
+    /// \param display      EGL display
+    /// \param bitsPerPixel Pixel depth, in bits per pixel
+    /// \param settings     Requested context settings
+    ///
+    /// \return The best EGL config
+    ///
+    ////////////////////////////////////////////////////////////
+    static EGLConfig getBestConfig(EGLDisplay display, unsigned int bitsPerPixel, const ContextSettings& settings);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the address of an OpenGL function
+    ///
+    /// \param name Name of the function to get the address of
+    ///
+    /// \return Address of the OpenGL function, 0 on failure
+    ///
+    ////////////////////////////////////////////////////////////
+    static GlFunctionPointer getFunction(const char* name);
+
+protected:
+
+    friend class VideoModeImpl;
+    friend class WindowImplDRM;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get Direct Rendering Manager pointer
+    ///
+    ////////////////////////////////////////////////////////////
+    static drm* getDRM();
+
+private:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Helper to copy the picked EGL configuration
+    ///
+    ////////////////////////////////////////////////////////////
+    void updateSettings();
+
+    ////////////////////////////////////////////////////////////
+    // Member data
+    ////////////////////////////////////////////////////////////
+    EGLDisplay  m_display; ///< The internal EGL display
+    EGLContext  m_context; ///< The internal EGL context
+    EGLSurface  m_surface; ///< The internal EGL surface
+    EGLConfig   m_config;  ///< The internal EGL config
+
+    gbm_bo* m_currentBO;
+    gbm_bo* m_nextBO;
+    gbm_surface* m_gbmSurface;
+    unsigned int m_width;
+    unsigned int m_height;
+    bool m_shown;
+    bool m_scanOut;
+};
+
+} // namespace priv
+
+} // namespace sf
+
+
+#endif // SFML_DRMCONTEXT_HPP

src/SFML/Window/DRM/InputImplUDev.cpp

@@ -0,0 +1,716 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2016 Andrew Mickelson
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/DRM/InputImplUDev.hpp>
+#include <SFML/System/Err.hpp>
+#include <SFML/System/Lock.hpp>
+#include <SFML/System/Mutex.hpp>
+#include <cerrno>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <queue>
+#include <sstream>
+#include <sys/stat.h>
+#include <termios.h>
+#include <unistd.h>
+#include <vector>
+
+
+namespace
+{
+    struct TouchSlot
+    {
+        int oldId;
+        int id;
+        sf::Vector2i pos;
+
+        TouchSlot() :
+        oldId(-1),
+        id(-1),
+        pos(0, 0)
+        {
+        }
+    };
+
+    sf::Mutex         inputMutex;                              // threadsafe? maybe...
+    sf::Vector2i      mousePos;                                // current mouse position
+
+    std::vector<int>  fileDescriptors;                         // list of open file descriptors for /dev/input
+    std::vector<bool> mouseMap(sf::Mouse::ButtonCount, false); // track whether keys are down
+    std::vector<bool> keyMap(sf::Keyboard::KeyCount, false);   // track whether mouse buttons are down
+
+    int touchFd = -1;                                          // file descriptor we have seen MT events on; assumes only 1
+    std::vector<TouchSlot> touchSlots;                         // track the state of each touch "slot"
+    int currentSlot = 0;                                       // which slot are we currently updating?
+
+    std::queue<sf::Event> eventQueue;                          // events received and waiting to be consumed
+    const int MAX_QUEUE = 64;                                  // The maximum size we let eventQueue grow to
+
+    termios newTerminalConfig, oldTerminalConfig;              // Terminal configurations
+
+    bool altDown() { return (keyMap[sf::Keyboard::LAlt] || keyMap[sf::Keyboard::RAlt]); }
+    bool controlDown() { return (keyMap[sf::Keyboard::LControl] || keyMap[sf::Keyboard::RControl]); }
+    bool shiftDown() { return (keyMap[sf::Keyboard::LShift] || keyMap[sf::Keyboard::RShift]); }
+    bool systemDown() { return (keyMap[sf::Keyboard::LSystem] || keyMap[sf::Keyboard::RSystem]); }
+
+    void uninitFileDescriptors(void)
+    {
+        for (std::vector<int>::iterator itr = fileDescriptors.begin(); itr != fileDescriptors.end(); ++itr)
+            close(*itr);
+    }
+
+#define BITS_PER_LONG           (sizeof(unsigned long) * 8)
+#define NBITS(x)                (((x - 1) / BITS_PER_LONG) + 1)
+#define OFF(x)                  (x % BITS_PER_LONG)
+#define LONG(x)                 (x / BITS_PER_LONG)
+#define TEST_BIT(bit, array)    ((array[LONG(bit)] >> OFF(bit)) & 1)
+
+    // Only keep fileDescriptors that we think are a keyboard, mouse or touchpad/touchscreen
+    // Joysticks are handled in /src/SFML/Window/Unix/JoystickImpl.cpp
+    bool keepFileDescriptor(int fileDesc)
+    {
+        unsigned long bitmask_ev[NBITS(EV_MAX)];
+        unsigned long bitmask_key[NBITS(KEY_MAX)];
+        unsigned long bitmask_abs[NBITS(ABS_MAX)];
+        unsigned long bitmask_rel[NBITS(REL_MAX)];
+
+        ioctl(fileDesc, EVIOCGBIT(0, sizeof(bitmask_ev)), &bitmask_ev);
+        ioctl(fileDesc, EVIOCGBIT(EV_KEY, sizeof(bitmask_key)), &bitmask_key);
+        ioctl(fileDesc, EVIOCGBIT(EV_ABS, sizeof(bitmask_abs)), &bitmask_abs);
+        ioctl(fileDesc, EVIOCGBIT(EV_REL, sizeof(bitmask_rel)), &bitmask_rel);
+
+        // This is the keyboard test used by SDL.
+        // The first 32 bits are ESC, numbers and Q to D;  If we have any of those,
+        // consider it a keyboard device; do not test for KEY_RESERVED, though
+        bool is_keyboard = (bitmask_key[0] & 0xFFFFFFFE);
+
+        bool is_abs = TEST_BIT(EV_ABS, bitmask_ev)
+            && TEST_BIT(ABS_X, bitmask_abs) && TEST_BIT(ABS_Y, bitmask_abs);
+
+        bool is_rel = TEST_BIT(EV_REL, bitmask_ev)
+            && TEST_BIT(REL_X, bitmask_rel) && TEST_BIT(REL_Y, bitmask_rel);
+
+        bool is_mouse = (is_abs || is_rel) && TEST_BIT(BTN_MOUSE, bitmask_key);
+
+        bool is_touch = is_abs && (TEST_BIT(BTN_TOOL_FINGER, bitmask_key) || TEST_BIT(BTN_TOUCH, bitmask_key));
+
+        return is_keyboard || is_mouse || is_touch;
+    }
+
+    void initFileDescriptors()
+    {
+        static bool initialized = false;
+        if (initialized)
+            return;
+
+        initialized = true;
+
+        for (int i = 0; i < 32; i++)
+        {
+            std::string name("/dev/input/event");
+            std::ostringstream stream;
+            stream << i;
+            name += stream.str();
+
+            int tempFD = open(name.c_str(), O_RDONLY | O_NONBLOCK);
+
+            if (tempFD < 0)
+            {
+                if (errno != ENOENT)
+                    sf::err() << "Error opening " << name << ": " << std::strerror(errno) << std::endl;
+
+                continue;
+            }
+
+            if (keepFileDescriptor(tempFD))
+                fileDescriptors.push_back(tempFD);
+            else
+                close(tempFD);
+        }
+
+        std::atexit(uninitFileDescriptors);
+    }
+
+    sf::Mouse::Button toMouseButton(int code)
+    {
+        switch (code)
+        {
+            case BTN_LEFT:          return sf::Mouse::Left;
+            case BTN_RIGHT:         return sf::Mouse::Right;
+            case BTN_MIDDLE:        return sf::Mouse::Middle;
+            case BTN_SIDE:          return sf::Mouse::XButton1;
+            case BTN_EXTRA:         return sf::Mouse::XButton2;
+
+            default:
+                return sf::Mouse::ButtonCount;
+        }
+    }
+
+    sf::Keyboard::Key toKey(int code)
+    {
+        switch (code)
+        {
+            case KEY_ESC:           return sf::Keyboard::Escape;
+            case KEY_1:             return sf::Keyboard::Num1;
+            case KEY_2:             return sf::Keyboard::Num2;
+            case KEY_3:             return sf::Keyboard::Num3;
+            case KEY_4:             return sf::Keyboard::Num4;
+            case KEY_5:             return sf::Keyboard::Num5;
+            case KEY_6:             return sf::Keyboard::Num6;
+            case KEY_7:             return sf::Keyboard::Num7;
+            case KEY_8:             return sf::Keyboard::Num8;
+            case KEY_9:             return sf::Keyboard::Num9;
+            case KEY_0:             return sf::Keyboard::Num0;
+            case KEY_MINUS:         return sf::Keyboard::Hyphen;
+            case KEY_EQUAL:         return sf::Keyboard::Equal;
+            case KEY_BACKSPACE:     return sf::Keyboard::Backspace;
+            case KEY_TAB:           return sf::Keyboard::Tab;
+            case KEY_Q:             return sf::Keyboard::Q;
+            case KEY_W:             return sf::Keyboard::W;
+            case KEY_E:             return sf::Keyboard::E;
+            case KEY_R:             return sf::Keyboard::R;
+            case KEY_T:             return sf::Keyboard::T;
+            case KEY_Y:             return sf::Keyboard::Y;
+            case KEY_U:             return sf::Keyboard::U;
+            case KEY_I:             return sf::Keyboard::I;
+            case KEY_O:             return sf::Keyboard::O;
+            case KEY_P:             return sf::Keyboard::P;
+            case KEY_LEFTBRACE:     return sf::Keyboard::LBracket;
+            case KEY_RIGHTBRACE:    return sf::Keyboard::RBracket;
+            case KEY_KPENTER:
+            case KEY_ENTER:         return sf::Keyboard::Enter;
+            case KEY_LEFTCTRL:      return sf::Keyboard::LControl;
+            case KEY_A:             return sf::Keyboard::A;
+            case KEY_S:             return sf::Keyboard::S;
+            case KEY_D:             return sf::Keyboard::D;
+            case KEY_F:             return sf::Keyboard::F;
+            case KEY_G:             return sf::Keyboard::G;
+            case KEY_H:             return sf::Keyboard::H;
+            case KEY_J:             return sf::Keyboard::J;
+            case KEY_K:             return sf::Keyboard::K;
+            case KEY_L:             return sf::Keyboard::L;
+            case KEY_SEMICOLON:     return sf::Keyboard::Semicolon;
+            case KEY_APOSTROPHE:    return sf::Keyboard::Quote;
+            case KEY_GRAVE:         return sf::Keyboard::Tilde;
+            case KEY_LEFTSHIFT:     return sf::Keyboard::LShift;
+            case KEY_BACKSLASH:     return sf::Keyboard::Backslash;
+            case KEY_Z:             return sf::Keyboard::Z;
+            case KEY_X:             return sf::Keyboard::X;
+            case KEY_C:             return sf::Keyboard::C;
+            case KEY_V:             return sf::Keyboard::V;
+            case KEY_B:             return sf::Keyboard::B;
+            case KEY_N:             return sf::Keyboard::N;
+            case KEY_M:             return sf::Keyboard::M;
+            case KEY_COMMA:         return sf::Keyboard::Comma;
+            case KEY_DOT:           return sf::Keyboard::Period;
+            case KEY_SLASH:         return sf::Keyboard::Slash;
+            case KEY_RIGHTSHIFT:    return sf::Keyboard::RShift;
+            case KEY_KPASTERISK:    return sf::Keyboard::Multiply;
+            case KEY_LEFTALT:       return sf::Keyboard::LAlt;
+            case KEY_SPACE:         return sf::Keyboard::Space;
+            case KEY_F1:            return sf::Keyboard::F1;
+            case KEY_F2:            return sf::Keyboard::F2;
+            case KEY_F3:            return sf::Keyboard::F3;
+            case KEY_F4:            return sf::Keyboard::F4;
+            case KEY_F5:            return sf::Keyboard::F5;
+            case KEY_F6:            return sf::Keyboard::F6;
+            case KEY_F7:            return sf::Keyboard::F7;
+            case KEY_F8:            return sf::Keyboard::F8;
+            case KEY_F9:            return sf::Keyboard::F9;
+            case KEY_F10:           return sf::Keyboard::F10;
+            case KEY_F11:           return sf::Keyboard::F11;
+            case KEY_F12:           return sf::Keyboard::F12;
+            case KEY_F13:           return sf::Keyboard::F13;
+            case KEY_F14:           return sf::Keyboard::F14;
+            case KEY_F15:           return sf::Keyboard::F15;
+            case KEY_KP7:           return sf::Keyboard::Numpad7;
+            case KEY_KP8:           return sf::Keyboard::Numpad8;
+            case KEY_KP9:           return sf::Keyboard::Numpad9;
+            case KEY_KPMINUS:       return sf::Keyboard::Subtract;
+            case KEY_KP4:           return sf::Keyboard::Numpad4;
+            case KEY_KP5:           return sf::Keyboard::Numpad5;
+            case KEY_KP6:           return sf::Keyboard::Numpad6;
+            case KEY_KPPLUS:        return sf::Keyboard::Add;
+            case KEY_KP1:           return sf::Keyboard::Numpad1;
+            case KEY_KP2:           return sf::Keyboard::Numpad2;
+            case KEY_KP3:           return sf::Keyboard::Numpad3;
+            case KEY_KP0:           return sf::Keyboard::Numpad0;
+            case KEY_KPDOT:         return sf::Keyboard::Delete;
+            case KEY_RIGHTCTRL:     return sf::Keyboard::RControl;
+            case KEY_KPSLASH:       return sf::Keyboard::Divide;
+            case KEY_RIGHTALT:      return sf::Keyboard::RAlt;
+            case KEY_HOME:          return sf::Keyboard::Home;
+            case KEY_UP:            return sf::Keyboard::Up;
+            case KEY_PAGEUP:        return sf::Keyboard::PageUp;
+            case KEY_LEFT:          return sf::Keyboard::Left;
+            case KEY_RIGHT:         return sf::Keyboard::Right;
+            case KEY_END:           return sf::Keyboard::End;
+            case KEY_DOWN:          return sf::Keyboard::Down;
+            case KEY_PAGEDOWN:      return sf::Keyboard::PageDown;
+            case KEY_INSERT:        return sf::Keyboard::Insert;
+            case KEY_DELETE:        return sf::Keyboard::Delete;
+            case KEY_PAUSE:         return sf::Keyboard::Pause;
+            case KEY_LEFTMETA:      return sf::Keyboard::LSystem;
+            case KEY_RIGHTMETA:     return sf::Keyboard::RSystem;
+
+            case KEY_RESERVED:
+            case KEY_SYSRQ:
+            case KEY_CAPSLOCK:
+            case KEY_NUMLOCK:
+            case KEY_SCROLLLOCK:
+            default:
+               return sf::Keyboard::Unknown;
+        }
+    }
+
+    void pushEvent(sf::Event& event)
+    {
+        if (eventQueue.size() >= MAX_QUEUE)
+            eventQueue.pop();
+
+        eventQueue.push(event);
+    }
+
+    TouchSlot& atSlot(int idx)
+    {
+        if (idx >= static_cast<int>(touchSlots.size()))
+            touchSlots.resize(static_cast<size_t>(idx + 1));
+        return touchSlots.at(static_cast<size_t>(idx));
+    }
+
+    void processSlots()
+    {
+        for (std::vector<TouchSlot>::iterator slot = touchSlots.begin(); slot != touchSlots.end(); ++slot)
+        {
+            sf::Event event;
+
+            event.touch.x = slot->pos.x;
+            event.touch.y = slot->pos.y;
+
+            if (slot->oldId == slot->id)
+            {
+                event.type = sf::Event::TouchMoved;
+                event.touch.finger = static_cast<unsigned int>(slot->id);
+                pushEvent(event);
+            }
+            else
+            {
+                if (slot->oldId != -1)
+                {
+                    event.type = sf::Event::TouchEnded;
+                    event.touch.finger = static_cast<unsigned int>(slot->oldId);
+                    pushEvent(event);
+                }
+                if (slot->id != -1)
+                {
+                    event.type = sf::Event::TouchBegan;
+                    event.touch.finger = static_cast<unsigned int>(slot->id);
+                    pushEvent(event);
+                }
+
+                slot->oldId = slot->id;
+            }
+        }
+    }
+
+    bool eventProcess(sf::Event& event)
+    {
+        sf::Lock lock(inputMutex);
+
+        // Ensure that we are initialized
+        initFileDescriptors();
+
+        // This is for handling the Backspace and DEL text events, which we
+        // generate based on keystrokes (and not stdin)
+        static unsigned int doDeferredText = 0;
+        if (doDeferredText)
+        {
+            event.type = sf::Event::TextEntered;
+            event.text.unicode = doDeferredText;
+            doDeferredText = 0;
+            return true;
+        }
+
+        ssize_t bytesRead;
+
+        // Check all the open file descriptors for the next event
+        for (std::vector<int>::iterator itr = fileDescriptors.begin(); itr != fileDescriptors.end(); ++itr)
+        {
+            input_event inputEvent;
+            bytesRead = read(*itr, &inputEvent, sizeof(inputEvent));
+
+            while (bytesRead > 0)
+            {
+                if (inputEvent.type == EV_KEY)
+                {
+                    sf::Mouse::Button mb = toMouseButton(inputEvent.code);
+                    if (mb != sf::Mouse::ButtonCount)
+                    {
+                        event.type = inputEvent.value ? sf::Event::MouseButtonPressed : sf::Event::MouseButtonReleased;
+                        event.mouseButton.button = mb;
+                        event.mouseButton.x = mousePos.x;
+                        event.mouseButton.y = mousePos.y;
+
+                        mouseMap[mb] = inputEvent.value;
+                        return true;
+                    }
+                    else
+                    {
+                        sf::Keyboard::Key kb = toKey(inputEvent.code);
+
+                        unsigned int special = 0;
+                        if ((kb == sf::Keyboard::Delete)
+                                || (kb == sf::Keyboard::Backspace))
+                            special = (kb == sf::Keyboard::Delete) ? 127 : 8;
+
+                        if (inputEvent.value == 2)
+                        {
+                            // key repeat events
+                            //
+                            if (special)
+                            {
+                                event.type = sf::Event::TextEntered;
+                                event.text.unicode = special;
+                                return true;
+                            }
+                        }
+                        else if (kb != sf::Keyboard::Unknown)
+                        {
+                            // key down and key up events
+                            //
+                            event.type = inputEvent.value ? sf::Event::KeyPressed : sf::Event::KeyReleased;
+                            event.key.code = kb;
+                            event.key.alt = altDown();
+                            event.key.control = controlDown();
+                            event.key.shift = shiftDown();
+                            event.key.system = systemDown();
+
+                            keyMap[kb] = inputEvent.value;
+
+                            if (special && inputEvent.value)
+                                doDeferredText = special;
+
+                            return true;
+                        }
+                    }
+                }
+                else if (inputEvent.type == EV_REL)
+                {
+                    bool posChange = false;
+                    switch (inputEvent.code)
+                    {
+                    case REL_X:
+                        mousePos.x += inputEvent.value;
+                        posChange = true;
+                        break;
+
+                    case REL_Y:
+                        mousePos.y += inputEvent.value;
+                        posChange = true;
+                        break;
+
+                    case REL_WHEEL:
+                        event.type = sf::Event::MouseWheelScrolled;
+                        event.mouseWheelScroll.delta = static_cast<float>(inputEvent.value);
+                        event.mouseWheelScroll.x = mousePos.x;
+                        event.mouseWheelScroll.y = mousePos.y;
+                        return true;
+                    }
+
+                    if (posChange)
+                    {
+                        event.type = sf::Event::MouseMoved;
+                        event.mouseMove.x = mousePos.x;
+                        event.mouseMove.y = mousePos.y;
+                        return true;
+                    }
+                }
+                else if (inputEvent.type == EV_ABS)
+                {
+                    switch (inputEvent.code)
+                    {
+                    case ABS_MT_SLOT:
+                        currentSlot = inputEvent.value;
+                        touchFd = *itr;
+                        break;
+                    case ABS_MT_TRACKING_ID:
+                        atSlot(currentSlot).id = inputEvent.value;
+                        touchFd = *itr;
+                        break;
+                    case ABS_MT_POSITION_X:
+                        atSlot(currentSlot).pos.x = inputEvent.value;
+                        touchFd = *itr;
+                        break;
+                    case ABS_MT_POSITION_Y:
+                        atSlot(currentSlot).pos.y = inputEvent.value;
+                        touchFd = *itr;
+                        break;
+                    }
+                }
+                else if (inputEvent.type == EV_SYN && inputEvent.code == SYN_REPORT &&
+                          *itr == touchFd)
+                {
+                    // This pushes events directly to the queue, because it
+                    // can generate more than one event.
+                    processSlots();
+                }
+
+                bytesRead = read(*itr, &inputEvent, sizeof(inputEvent));
+            }
+
+            if ((bytesRead < 0) && (errno != EAGAIN))
+                sf::err() << " Error: " << std::strerror(errno) << std::endl;
+        }
+
+        // Finally check if there is a Text event on stdin
+        //
+        // We only clear the ICANON flag for the time of reading
+
+        newTerminalConfig.c_lflag &= ~(tcflag_t)ICANON;
+        tcsetattr(STDIN_FILENO, TCSANOW, &newTerminalConfig);
+
+        timeval timeout;
+        timeout.tv_sec = 0;
+        timeout.tv_usec = 0;
+
+        unsigned char code = 0;
+
+        fd_set readFDSet;
+        FD_ZERO(&readFDSet);
+        FD_SET(STDIN_FILENO, &readFDSet);
+        int ready = select(STDIN_FILENO + 1, &readFDSet, NULL, NULL, &timeout);
+
+        if (ready > 0 && FD_ISSET(STDIN_FILENO, &readFDSet))
+            bytesRead = read(STDIN_FILENO, &code, 1);
+
+        if ((code == 127) || (code == 8))  // Suppress 127 (DEL) to 8 (BACKSPACE)
+            code = 0;
+        else if (code == 27)  // ESC
+        {
+            // Suppress ANSI escape sequences
+            FD_ZERO(&readFDSet);
+            FD_SET(STDIN_FILENO, &readFDSet);
+            ready = select(STDIN_FILENO + 1, &readFDSet, NULL, NULL, &timeout);
+            if (ready > 0 && FD_ISSET(STDIN_FILENO, &readFDSet))
+            {
+                unsigned char tempBuffer[16];
+                bytesRead = read(STDIN_FILENO, tempBuffer, 16);
+                code = 0;
+            }
+        }
+
+        newTerminalConfig.c_lflag |= ICANON;
+        tcsetattr(STDIN_FILENO, TCSANOW, &newTerminalConfig);
+
+        if (code > 0)
+        {
+            // TODO: Proper unicode handling
+            event.type = sf::Event::TextEntered;
+            event.text.unicode = code;
+            return true;
+        }
+
+        // No events available
+        return false;
+    }
+
+    // assumes inputMutex is locked
+    void update()
+    {
+        sf::Event event;
+        while (eventProcess(event))
+        {
+            pushEvent(event);
+        }
+    }
+}
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+bool InputImpl::isKeyPressed(Keyboard::Key key)
+{
+    Lock lock(inputMutex);
+    if ((key < 0) || (key >= static_cast<int>(keyMap.size())))
+        return false;
+
+    update();
+    return keyMap[key];
+}
+
+
+////////////////////////////////////////////////////////////
+void InputImpl::setVirtualKeyboardVisible(bool /*visible*/)
+{
+    // Not applicable
+}
+
+
+////////////////////////////////////////////////////////////
+bool InputImpl::isMouseButtonPressed(Mouse::Button button)
+{
+    Lock lock(inputMutex);
+    if ((button < 0) || (button >= static_cast<int>(mouseMap.size())))
+        return false;
+
+    update();
+    return mouseMap[button];
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2i InputImpl::getMousePosition()
+{
+    Lock lock(inputMutex);
+    return mousePos;
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2i InputImpl::getMousePosition(const WindowBase& /*relativeTo*/)
+{
+    return getMousePosition();
+}
+
+
+////////////////////////////////////////////////////////////
+void InputImpl::setMousePosition(const Vector2i& position)
+{
+    Lock lock(inputMutex);
+    mousePos = position;
+}
+
+
+////////////////////////////////////////////////////////////
+void InputImpl::setMousePosition(const Vector2i& position, const WindowBase& /*relativeTo*/)
+{
+    setMousePosition(position);
+}
+
+
+////////////////////////////////////////////////////////////
+bool InputImpl::isTouchDown(unsigned int finger)
+{
+    for (std::vector<TouchSlot>::iterator slot = touchSlots.begin(); slot != touchSlots.end(); ++slot)
+    {
+        if (slot->id == static_cast<int>(finger))
+            return true;
+    }
+
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2i InputImpl::getTouchPosition(unsigned int finger)
+{
+    for (std::vector<TouchSlot>::iterator slot = touchSlots.begin(); slot != touchSlots.end(); ++slot)
+    {
+        if (slot->id == static_cast<int>(finger))
+            return slot->pos;
+    }
+
+    return Vector2i();
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2i InputImpl::getTouchPosition(unsigned int finger, const WindowBase& /*relativeTo*/)
+{
+    return getTouchPosition(finger);
+}
+
+
+////////////////////////////////////////////////////////////
+bool InputImpl::checkEvent(sf::Event& event)
+{
+    Lock lock(inputMutex);
+    if (!eventQueue.empty())
+    {
+        event = eventQueue.front();
+        eventQueue.pop();
+
+        return true;
+    }
+
+    if (eventProcess(event))
+    {
+        return true;
+    }
+    else
+    {
+        // In the case of multitouch, eventProcess() could have returned false
+        // but added events directly to the queue.  (This is ugly, but I'm not
+        // sure of a good way to handle generating multiple events at once.)
+        if (!eventQueue.empty())
+        {
+            event = eventQueue.front();
+            eventQueue.pop();
+
+            return true;
+        }
+    }
+
+    return false;
+}
+
+
+////////////////////////////////////////////////////////////
+void InputImpl::setTerminalConfig()
+{
+    sf::Lock lock(inputMutex);
+    initFileDescriptors();
+
+    tcgetattr(STDIN_FILENO, &newTerminalConfig);          // get current terminal config
+    oldTerminalConfig = newTerminalConfig;                // create a backup
+    newTerminalConfig.c_lflag &= ~(tcflag_t)ECHO;         // disable console feedback
+    newTerminalConfig.c_lflag &= ~(tcflag_t)ISIG;         // disable signals
+    newTerminalConfig.c_lflag |= ICANON;                  // disable noncanonical mode
+    newTerminalConfig.c_iflag |= IGNCR;                   // ignore carriage return
+    tcsetattr(STDIN_FILENO, TCSANOW, &newTerminalConfig); // set our new config
+    tcflush(STDIN_FILENO, TCIFLUSH);                      // flush the buffer
+}
+
+
+////////////////////////////////////////////////////////////
+void InputImpl::restoreTerminalConfig()
+{
+    sf::Lock lock(inputMutex);
+    initFileDescriptors();
+
+    tcsetattr(STDIN_FILENO, TCSANOW, &oldTerminalConfig); // restore terminal config
+    tcflush(STDIN_FILENO, TCIFLUSH);                      // flush the buffer
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/InputImplUDev.hpp

@@ -0,0 +1,193 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2016 Andrew Mickelson
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_INPUTIMPLUDEV_HPP
+#define SFML_INPUTIMPLUDEV_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/Keyboard.hpp>
+#include <SFML/Window/Mouse.hpp>
+#include <SFML/Window/Event.hpp>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+/// \brief Linux (DRM) implementation of inputs (keyboard + mouse)
+///
+////////////////////////////////////////////////////////////
+class InputImpl
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Check if a key is pressed
+    ///
+    /// \param key Key to check
+    ///
+    /// \return True if the key is pressed, false otherwise
+    ///
+    ////////////////////////////////////////////////////////////
+    static bool isKeyPressed(Keyboard::Key key);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Show or hide the virtual keyboard
+    ///
+    /// \param visible True to show, false to hide
+    ///
+    ////////////////////////////////////////////////////////////
+    static void setVirtualKeyboardVisible(bool visible);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Check if a mouse button is pressed
+    ///
+    /// \param button Button to check
+    ///
+    /// \return True if the button is pressed, false otherwise
+    ///
+    ////////////////////////////////////////////////////////////
+    static bool isMouseButtonPressed(Mouse::Button button);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current position of the mouse in desktop coordinates
+    ///
+    /// This function returns the current position of the mouse
+    /// cursor, in global (desktop) coordinates.
+    ///
+    /// \return Current position of the mouse
+    ///
+    ////////////////////////////////////////////////////////////
+    static Vector2i getMousePosition();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current position of the mouse in window coordinates
+    ///
+    /// This function returns the current position of the mouse
+    /// cursor, relative to the given window.
+    /// If no window is used, it returns desktop coordinates.
+    ///
+    /// \param relativeTo Reference window
+    ///
+    /// \return Current position of the mouse
+    ///
+    ////////////////////////////////////////////////////////////
+    static Vector2i getMousePosition(const WindowBase& relativeTo);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Set the current position of the mouse in desktop coordinates
+    ///
+    /// This function sets the current position of the mouse
+    /// cursor in global (desktop) coordinates.
+    /// If no window is used, it sets the position in desktop coordinates.
+    ///
+    /// \param position New position of the mouse
+    ///
+    ////////////////////////////////////////////////////////////
+    static void setMousePosition(const Vector2i& position);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Set the current position of the mouse in window coordinates
+    ///
+    /// This function sets the current position of the mouse
+    /// cursor, relative to the given window.
+    /// If no window is used, it sets the position in desktop coordinates.
+    ///
+    /// \param position New position of the mouse
+    /// \param relativeTo Reference window
+    ///
+    ////////////////////////////////////////////////////////////
+    static void setMousePosition(const Vector2i& position, const WindowBase& relativeTo);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Check if a touch event is currently down
+    ///
+    /// \param finger Finger index
+    ///
+    /// \return True if \a finger is currently touching the screen, false otherwise
+    ///
+    ////////////////////////////////////////////////////////////
+    static bool isTouchDown(unsigned int finger);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current position of a touch in desktop coordinates
+    ///
+    /// This function returns the current touch position
+    /// in global (desktop) coordinates.
+    ///
+    /// \param finger Finger index
+    ///
+    /// \return Current position of \a finger, or undefined if it's not down
+    ///
+    ////////////////////////////////////////////////////////////
+    static Vector2i getTouchPosition(unsigned int finger);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the current position of a touch in window coordinates
+    ///
+    /// This function returns the current touch position
+    /// in global (desktop) coordinates.
+    ///
+    /// \param finger Finger index
+    /// \param relativeTo Reference window
+    ///
+    /// \return Current position of \a finger, or undefined if it's not down
+    ///
+    ////////////////////////////////////////////////////////////
+    static Vector2i getTouchPosition(unsigned int finger, const WindowBase& relativeTo);
+
+private:
+
+    friend class WindowImplDRM;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Fetch input event from event queue
+    ///
+    /// \return False if event queue is empty
+    ///
+    ////////////////////////////////////////////////////////////
+    static bool checkEvent(sf::Event& event);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Backup terminal configuration and disable console feedback
+    ///
+    ////////////////////////////////////////////////////////////
+    static void setTerminalConfig();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Restore terminal configuration from backup
+    ///
+    ////////////////////////////////////////////////////////////
+    static void restoreTerminalConfig();
+};
+
+} // namespace priv
+
+} // namespace sf
+
+
+#endif // SFML_INPUTIMPLUDEV_HPP

src/SFML/Window/DRM/VideoModeImpl.cpp

@@ -0,0 +1,73 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2020 Andrew Mickelson
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/VideoModeImpl.hpp>
+#include <SFML/Window/DRM/DRMContext.hpp>
+#include <SFML/System/Err.hpp>
+#include <drm-common.h>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+std::vector<VideoMode> VideoModeImpl::getFullscreenModes()
+{
+    std::vector<VideoMode> modes;
+
+    drm* drm = sf::priv::DRMContext::getDRM();
+    drmModeConnectorPtr conn = drm->saved_connector;
+
+    if (conn)
+    {
+        for (int i = 0; i < conn->count_modes; i++)
+            modes.push_back(
+                VideoMode(conn->modes[i].hdisplay,
+                    conn->modes[i].vdisplay));
+    }
+    else
+        modes.push_back(getDesktopMode());
+
+    return modes;
+}
+
+
+////////////////////////////////////////////////////////////
+VideoMode VideoModeImpl::getDesktopMode()
+{
+    drm* drm = sf::priv::DRMContext::getDRM();
+    drmModeModeInfoPtr ptr = drm->mode;
+    if (ptr)
+        return VideoMode(ptr->hdisplay, ptr->vdisplay);
+    else
+        return VideoMode(0, 0);
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/WindowImplDRM.cpp

@@ -0,0 +1,161 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2020 Andrew Mickelson
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/DRM/WindowImplDRM.hpp>
+#include <SFML/Window/DRM/DRMContext.hpp>
+#include <SFML/Window/DRM/InputImplUDev.hpp>
+#include <SFML/Window/Event.hpp>
+#include <SFML/Window/WindowStyle.hpp>
+#include <SFML/System/Err.hpp>
+#include <drm-common.h>
+
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+WindowImplDRM::WindowImplDRM(WindowHandle /*handle*/) :
+m_size(0, 0)
+{
+    sf::priv::InputImpl::setTerminalConfig();
+}
+
+
+////////////////////////////////////////////////////////////
+WindowImplDRM::WindowImplDRM(VideoMode mode, const String& /*title*/, unsigned long /*style*/, const ContextSettings& /*settings*/) :
+m_size(mode.width, mode.height)
+{
+    sf::priv::InputImpl::setTerminalConfig();
+}
+
+
+////////////////////////////////////////////////////////////
+WindowImplDRM::~WindowImplDRM()
+{
+    sf::priv::InputImpl::restoreTerminalConfig();
+}
+
+
+////////////////////////////////////////////////////////////
+WindowHandle WindowImplDRM::getSystemHandle() const
+{
+    drm* drm = sf::priv::DRMContext::getDRM();
+    return static_cast<WindowHandle>(drm->fd);
+}
+
+////////////////////////////////////////////////////////////
+Vector2i WindowImplDRM::getPosition() const
+{
+    return Vector2i(0, 0);
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setPosition(const Vector2i& /*position*/)
+{
+}
+
+
+////////////////////////////////////////////////////////////
+Vector2u WindowImplDRM::getSize() const
+{
+    return m_size;
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setSize(const Vector2u& /*size*/)
+{
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setTitle(const String& /*title*/)
+{
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setIcon(unsigned int /*width*/, unsigned int /*height*/, const Uint8* /*pixels*/)
+{
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setVisible(bool /*visible*/)
+{
+}
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setMouseCursorVisible(bool /*visible*/)
+{
+    // TODO: not implemented
+}
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setMouseCursorGrabbed(bool /*grabbed*/)
+{
+    //TODO: not implemented
+}
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setMouseCursor(const CursorImpl& /*cursor*/)
+{
+    // TODO: not implemented
+}
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::setKeyRepeatEnabled(bool /*enabled*/)
+{
+    // TODO: not implemented
+}
+
+
+////////////////////////////////////////////////////////////
+void WindowImplDRM::requestFocus()
+{
+    // Not applicable
+}
+
+
+////////////////////////////////////////////////////////////
+bool WindowImplDRM::hasFocus() const
+{
+    return true;
+}
+
+void WindowImplDRM::processEvents()
+{
+    sf::Event ev;
+    while (sf::priv::InputImpl::checkEvent(ev))
+        pushEvent(ev);
+}
+
+} // namespace priv
+
+} // namespace sf

src/SFML/Window/DRM/WindowImplDRM.hpp

@@ -0,0 +1,205 @@
+////////////////////////////////////////////////////////////
+//
+// SFML - Simple and Fast Multimedia Library
+// Copyright (C) 2020 Andrew Mickelson
+//
+// This software is provided 'as-is', without any express or implied warranty.
+// In no event will the authors be held liable for any damages arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it freely,
+// subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented;
+//    you must not claim that you wrote the original software.
+//    If you use this software in a product, an acknowledgment
+//    in the product documentation would be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such,
+//    and must not be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source distribution.
+//
+////////////////////////////////////////////////////////////
+
+#ifndef SFML_WINDOWIMPLDRM_HPP
+#define SFML_WINDOWIMPLDRM_HPP
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Window/Event.hpp>
+#include <SFML/Window/WindowImpl.hpp>
+
+namespace sf
+{
+namespace priv
+{
+////////////////////////////////////////////////////////////
+/// \brief DRM implementation of WindowImpl
+///
+////////////////////////////////////////////////////////////
+class WindowImplDRM : public WindowImpl
+{
+public:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Construct the window implementation from an existing control
+    ///
+    /// \param handle Platform-specific handle of the control
+    ///
+    ////////////////////////////////////////////////////////////
+    WindowImplDRM(WindowHandle handle);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Create the window implementation
+    ///
+    /// \param mode     Video mode to use
+    /// \param title    Title of the window
+    /// \param style    Window style (resizable, fixed, or fullscren)
+    /// \param settings Additional settings for the underlying OpenGL context
+    ///
+    ////////////////////////////////////////////////////////////
+    WindowImplDRM(VideoMode mode, const String& title, unsigned long style, const ContextSettings& settings);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Destructor
+    ///
+    ////////////////////////////////////////////////////////////
+    ~WindowImplDRM();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the OS-specific handle of the window
+    ///
+    /// \return Handle of the window
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual WindowHandle getSystemHandle() const;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the position of the window
+    ///
+    /// \return Position of the window, in pixels
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Vector2i getPosition() const;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Change the position of the window on screen
+    ///
+    /// \param position New position of the window, in pixels
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setPosition(const Vector2i& position);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the client size of the window
+    ///
+    /// \return Size of the window, in pixels
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual Vector2u getSize() const;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Change the size of the rendering region of the window
+    ///
+    /// \param size New size, in pixels
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setSize(const Vector2u& size);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Change the title of the window
+    ///
+    /// \param title New title
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setTitle(const String& title);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Change the window's icon
+    ///
+    /// \param width  Icon's width, in pixels
+    /// \param height Icon's height, in pixels
+    /// \param pixels Pointer to the pixels in memory, format must be RGBA 32 bits
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setIcon(unsigned int width, unsigned int height, const Uint8* pixels);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Show or hide the window
+    ///
+    /// \param visible True to show, false to hide
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setVisible(bool visible);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Show or hide the mouse cursor
+    ///
+    /// \param visible True to show, false to hide
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setMouseCursorVisible(bool visible);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Grab or release the mouse cursor
+    ///
+    /// \param grabbed True to enable, false to disable
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setMouseCursorGrabbed(bool grabbed);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Set the displayed cursor to a native system cursor
+    ///
+    /// \param cursor Native system cursor type to display
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setMouseCursor(const CursorImpl& cursor);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Enable or disable automatic key-repeat
+    ///
+    /// \param enabled True to enable, false to disable
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void setKeyRepeatEnabled(bool enabled);
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Request the current window to be made the active
+    ///        foreground window
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void requestFocus();
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Check whether the window has the input focus
+    ///
+    /// \return True if window has focus, false otherwise
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual bool hasFocus() const;
+
+protected:
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Process incoming events from the operating system
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void processEvents();
+
+private:
+
+    ////////////////////////////////////////////////////////////
+    // Member data
+    ////////////////////////////////////////////////////////////
+    Vector2u m_size; ///< Window size
+};
+
+} // namespace priv
+
+} // namespace sf
+
+
+#endif // SFML_WINDOWIMPLDRM_HPP

src/SFML/Window/EglContext.cpp

@@ -35,7 +35,7 @@
 #ifdef SFML_SYSTEM_ANDROID
     #include <SFML/System/Android/Activity.hpp>
 #endif
-#ifdef SFML_SYSTEM_LINUX
+#if defined(SFML_SYSTEM_LINUX) && !defined(SFML_USE_DRM)
     #include <X11/Xlib.h>
 #endif
 
@@ -361,7 +361,7 @@ void EglContext::updateSettings()
 }
 
 
-#ifdef SFML_SYSTEM_LINUX
+#if defined(SFML_SYSTEM_LINUX) && !defined(SFML_USE_DRM)
 ////////////////////////////////////////////////////////////
 XVisualInfo EglContext::selectBestVisual(::Display* XDisplay, unsigned int bitsPerPixel, const ContextSettings& settings)
 {

src/SFML/Window/EglContext.hpp

@@ -34,7 +34,7 @@
 #include <SFML/Window/GlContext.hpp>
 #include <SFML/Window/WindowStyle.hpp> // Prevent conflict with macro None from Xlib
 #include <glad/egl.h>
-#ifdef SFML_SYSTEM_LINUX
+#if defined(SFML_SYSTEM_LINUX) && !defined(SFML_USE_DRM)
     #include <X11/Xlib.h>
 #endif
 
@@ -165,7 +165,7 @@ public:
     ////////////////////////////////////////////////////////////
     static EGLConfig getBestConfig(EGLDisplay display, unsigned int bitsPerPixel, const ContextSettings& settings);
 
-#ifdef SFML_SYSTEM_LINUX
+#if defined(SFML_SYSTEM_LINUX) && !defined(SFML_USE_DRM)
     ////////////////////////////////////////////////////////////
     /// \brief Select the best EGL visual for a given set of settings
     ///

src/SFML/Window/GlContext.cpp

@@ -63,6 +63,11 @@
 
         typedef sf::priv::EglContext ContextType;
 
+    #elif defined(SFML_USE_DRM)
+
+        #include <SFML/Window/DRM/DRMContext.hpp>
+        typedef sf::priv::DRMContext ContextType;
+
     #else
 
         #include <SFML/Window/Unix/GlxContext.hpp>

src/SFML/Window/InputImpl.hpp

@@ -33,7 +33,11 @@
 #if defined(SFML_SYSTEM_WINDOWS)
     #include <SFML/Window/Win32/InputImpl.hpp>
 #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD) || defined(SFML_SYSTEM_NETBSD)
-    #include <SFML/Window/Unix/InputImpl.hpp>
+    #if defined(SFML_USE_DRM)
+        #include <SFML/Window/DRM/InputImplUDev.hpp>
+    #else
+        #include <SFML/Window/Unix/InputImpl.hpp>
+    #endif
 #elif defined(SFML_SYSTEM_MACOS)
     #include <SFML/Window/OSX/InputImpl.hpp>
 #elif defined(SFML_SYSTEM_IOS)
@@ -42,5 +46,4 @@
     #include <SFML/Window/Android/InputImpl.hpp>
 #endif
 
-
 #endif // SFML_INPUTIMPL_HPP

src/SFML/Window/Vulkan.cpp

@@ -29,13 +29,21 @@
 
 #if defined(SFML_SYSTEM_WINDOWS)
 
-#include <SFML/Window/Win32/VulkanImplWin32.hpp>
+    #include <SFML/Window/Win32/VulkanImplWin32.hpp>
-typedef sf::priv::VulkanImplWin32 VulkanImplType;
+    typedef sf::priv::VulkanImplWin32 VulkanImplType;
 
 #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD) || defined(SFML_SYSTEM_NETBSD)
 
-#include <SFML/Window/Unix/VulkanImplX11.hpp>
+    #if defined(SFML_USE_DRM)
-typedef sf::priv::VulkanImplX11 VulkanImplType;
+
+        #define SFML_VULKAN_IMPLEMENTATION_NOT_AVAILABLE
+
+    #else
+
+        #include <SFML/Window/Unix/VulkanImplX11.hpp>
+        typedef sf::priv::VulkanImplX11 VulkanImplType;
+
+    #endif
 
 #else
 

src/SFML/Window/WindowImpl.cpp

@@ -43,11 +43,22 @@
 
 #elif defined(SFML_SYSTEM_LINUX) || defined(SFML_SYSTEM_FREEBSD) || defined(SFML_SYSTEM_OPENBSD) || defined(SFML_SYSTEM_NETBSD)
 
-    #include <SFML/Window/Unix/WindowImplX11.hpp>
+    #if defined(SFML_USE_DRM)
-    typedef sf::priv::WindowImplX11 WindowImplType;
 
-    #include <SFML/Window/Unix/VulkanImplX11.hpp>
+        #include <SFML/Window/DRM/WindowImplDRM.hpp>
-    typedef sf::priv::VulkanImplX11 VulkanImplType;
+        typedef sf::priv::WindowImplDRM WindowImplType;
+
+        #define SFML_VULKAN_IMPLEMENTATION_NOT_AVAILABLE
+
+    #else
+
+        #include <SFML/Window/Unix/WindowImplX11.hpp>
+        typedef sf::priv::WindowImplX11 WindowImplType;
+
+        #include <SFML/Window/Unix/VulkanImplX11.hpp>
+        typedef sf::priv::VulkanImplX11 VulkanImplType;
+
+    #endif
 
 #elif defined(SFML_SYSTEM_MACOS)
 
@@ -77,6 +88,7 @@ namespace sf
 {
 namespace priv
 {
+
 ////////////////////////////////////////////////////////////
 WindowImpl* WindowImpl::create(VideoMode mode, const String& title, Uint32 style, const ContextSettings& settings)
 {