src/video/wayland/SDL_waylandwindow.c - third_party/sdl - Git at Google

 /*
   Simple DirectMedia Layer
   Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.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.
 */

 #include "../../SDL_internal.h"

 #if SDL_VIDEO_DRIVER_WAYLAND && SDL_VIDEO_OPENGL_EGL

 #include "../SDL_sysvideo.h"
 #include "../../events/SDL_windowevents_c.h"
 #include "../SDL_egl_c.h"
 #include "SDL_waylandevents_c.h"
 #include "SDL_waylandwindow.h"
 #include "SDL_waylandvideo.h"
 #include "SDL_waylandtouch.h"
 #include "SDL_waylanddyn.h"
 #include "SDL_hints.h"

 static void
 handle_ping(void *data, struct wl_shell_surface *shell_surface,
             uint32_t serial)
 {
     wl_shell_surface_pong(shell_surface, serial);
 }

 static void
 handle_configure(void *data, struct wl_shell_surface *shell_surface,
                  uint32_t edges, int32_t width, int32_t height)
 {
     SDL_WindowData *wind = (SDL_WindowData *)data;
     SDL_Window *window = wind->sdlwindow;
     struct wl_region *region;

     /* wl_shell_surface spec states that this is a suggestion.
        Ignore if less than or greater than max/min size. */

     if (width == 0 || height == 0) {
         return;
     }

     if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
         if ((window->flags & SDL_WINDOW_RESIZABLE)) {
             if (window->max_w > 0) {
                 width = SDL_min(width, window->max_w);
             }
             width = SDL_max(width, window->min_w);

             if (window->max_h > 0) {
                 height = SDL_min(height, window->max_h);
             }
             height = SDL_max(height, window->min_h);
         } else {
             return;
         }
     }

     if (width == window->w && height == window->h) {
         return;
     }

     window->w = width;
     window->h = height;
     WAYLAND_wl_egl_window_resize(wind->egl_window, window->w, window->h, 0, 0);

     region = wl_compositor_create_region(wind->waylandData->compositor);
     wl_region_add(region, 0, 0, window->w, window->h);
     wl_surface_set_opaque_region(wind->surface, region);
     wl_region_destroy(region);
     SDL_SendWindowEvent(window, SDL_WINDOWEVENT_RESIZED, window->w, window->h);
 }

 static void
 handle_popup_done(void *data, struct wl_shell_surface *shell_surface)
 {
 }

 static const struct wl_shell_surface_listener shell_surface_listener = {
     handle_ping,
     handle_configure,
     handle_popup_done
 };

 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
 static void
 handle_onscreen_visibility(void *data,
         struct qt_extended_surface *qt_extended_surface, int32_t visible)
 {
 }

 static void
 handle_set_generic_property(void *data,
         struct qt_extended_surface *qt_extended_surface, const char *name,
         struct wl_array *value)
 {
 }

 static void
 handle_close(void *data, struct qt_extended_surface *qt_extended_surface)
 {
     SDL_WindowData *window = (SDL_WindowData *)data;
     SDL_SendWindowEvent(window->sdlwindow, SDL_WINDOWEVENT_CLOSE, 0, 0);
 }

 static const struct qt_extended_surface_listener extended_surface_listener = {
     handle_onscreen_visibility,
     handle_set_generic_property,
     handle_close,
 };
 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

 SDL_bool
 Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
 {
     SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
     const Uint32 version = ((((Uint32) info->version.major) * 1000000) +
                             (((Uint32) info->version.minor) * 10000) +
                             (((Uint32) info->version.patch)));

     /* Before 2.0.6, it was possible to build an SDL with Wayland support
        (SDL_SysWMinfo will be large enough to hold Wayland info), but build
        your app against SDL headers that didn't have Wayland support
        (SDL_SysWMinfo could be smaller than Wayland needs. This would lead
        to an app properly using SDL_GetWindowWMInfo() but we'd accidentally
        overflow memory on the stack or heap. To protect against this, we've
        padded out the struct unconditionally in the headers and Wayland will
        just return an error for older apps using this function. Those apps
        will need to be recompiled against newer headers or not use Wayland,
        maybe by forcing SDL_VIDEODRIVER=x11. */
     if (version < 2000006) {
         info->subsystem = SDL_SYSWM_UNKNOWN;
         SDL_SetError("Version must be 2.0.6 or newer");
         return SDL_FALSE;
     }

     info->info.wl.display = data->waylandData->display;
     info->info.wl.surface = data->surface;
     info->info.wl.shell_surface = data->shell_surface;
     info->subsystem = SDL_SYSWM_WAYLAND;

     return SDL_TRUE;
 }

 int
 Wayland_SetWindowHitTest(SDL_Window *window, SDL_bool enabled)
 {
     return 0;  /* just succeed, the real work is done elsewhere. */
 }

 void Wayland_ShowWindow(_THIS, SDL_Window *window)
 {
     SDL_WindowData *wind = window->driverdata;

     if (window->flags & SDL_WINDOW_FULLSCREEN)
         wl_shell_surface_set_fullscreen(wind->shell_surface,
                                         WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
                                         0, (struct wl_output *)window->fullscreen_mode.driverdata);
     else
         wl_shell_surface_set_toplevel(wind->shell_surface);

     WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
 }

 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
 static void QtExtendedSurface_OnHintChanged(void *userdata, const char *name,
         const char *oldValue, const char *newValue)
 {
     struct qt_extended_surface *qt_extended_surface = userdata;

     if (name == NULL) {
         return;
     }

     if (strcmp(name, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION) == 0) {
         int32_t orientation = QT_EXTENDED_SURFACE_ORIENTATION_PRIMARYORIENTATION;

         if (newValue != NULL) {
             if (strcmp(newValue, "portrait") == 0) {
                 orientation = QT_EXTENDED_SURFACE_ORIENTATION_PORTRAITORIENTATION;
             } else if (strcmp(newValue, "landscape") == 0) {
                 orientation = QT_EXTENDED_SURFACE_ORIENTATION_LANDSCAPEORIENTATION;
             } else if (strcmp(newValue, "inverted-portrait") == 0) {
                 orientation = QT_EXTENDED_SURFACE_ORIENTATION_INVERTEDPORTRAITORIENTATION;
             } else if (strcmp(newValue, "inverted-landscape") == 0) {
                 orientation = QT_EXTENDED_SURFACE_ORIENTATION_INVERTEDLANDSCAPEORIENTATION;
             }
         }

         qt_extended_surface_set_content_orientation(qt_extended_surface, orientation);
     } else if (strcmp(name, SDL_HINT_QTWAYLAND_WINDOW_FLAGS) == 0) {
         uint32_t flags = 0;

         if (newValue != NULL) {
             char *tmp = strdup(newValue);
             char *saveptr = NULL;

             char *flag = strtok_r(tmp, " ", &saveptr);
             while (flag) {
                 if (strcmp(flag, "OverridesSystemGestures") == 0) {
                     flags |= QT_EXTENDED_SURFACE_WINDOWFLAG_OVERRIDESSYSTEMGESTURES;
                 } else if (strcmp(flag, "StaysOnTop") == 0) {
                     flags |= QT_EXTENDED_SURFACE_WINDOWFLAG_STAYSONTOP;
                 } else if (strcmp(flag, "BypassWindowManager") == 0) {
                     // See https://github.com/qtproject/qtwayland/commit/fb4267103d
                     flags |= 4 /* QT_EXTENDED_SURFACE_WINDOWFLAG_BYPASSWINDOWMANAGER */;
                 }

                 flag = strtok_r(NULL, " ", &saveptr);
             }

             free(tmp);
         }

         qt_extended_surface_set_window_flags(qt_extended_surface, flags);
     }
 }

 static void QtExtendedSurface_Subscribe(struct qt_extended_surface *surface, const char *name)
 {
     SDL_AddHintCallback(name, QtExtendedSurface_OnHintChanged, surface);
 }

 static void QtExtendedSurface_Unsubscribe(struct qt_extended_surface *surface, const char *name)
 {
     SDL_DelHintCallback(name, QtExtendedSurface_OnHintChanged, surface);
 }
 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

 void
 Wayland_SetWindowFullscreen(_THIS, SDL_Window * window,
                             SDL_VideoDisplay * _display, SDL_bool fullscreen)
 {
     SDL_WindowData *wind = window->driverdata;

     if (fullscreen)
         wl_shell_surface_set_fullscreen(wind->shell_surface,
                                         WL_SHELL_SURFACE_FULLSCREEN_METHOD_SCALE,
                                         0, (struct wl_output *)_display->driverdata);
     else
         wl_shell_surface_set_toplevel(wind->shell_surface);

     WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
 }

 void
 Wayland_RestoreWindow(_THIS, SDL_Window * window)
 {
     SDL_WindowData *wind = window->driverdata;

     wl_shell_surface_set_toplevel(wind->shell_surface);

     WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
 }

 void
 Wayland_MaximizeWindow(_THIS, SDL_Window * window)
 {
     SDL_WindowData *wind = window->driverdata;

     wl_shell_surface_set_maximized(wind->shell_surface, NULL);

     WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
 }

 int Wayland_CreateWindow(_THIS, SDL_Window *window)
 {
     SDL_WindowData *data;
     SDL_VideoData *c;
     struct wl_region *region;

     data = calloc(1, sizeof *data);
     if (data == NULL)
         return SDL_OutOfMemory();

     c = _this->driverdata;
     window->driverdata = data;

     if (!(window->flags & SDL_WINDOW_OPENGL)) {
         SDL_GL_LoadLibrary(NULL);
         window->flags |= SDL_WINDOW_OPENGL;
     }

     if (window->x == SDL_WINDOWPOS_UNDEFINED) {
         window->x = 0;
     }
     if (window->y == SDL_WINDOWPOS_UNDEFINED) {
         window->y = 0;
     }

     data->waylandData = c;
     data->sdlwindow = window;

     data->surface =
         wl_compositor_create_surface(c->compositor);
     wl_surface_set_user_data(data->surface, data);
     data->shell_surface = wl_shell_get_shell_surface(c->shell,
                                                      data->surface);
     wl_shell_surface_set_class (data->shell_surface, c->classname);
 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
     if (c->surface_extension) {
         data->extended_surface = qt_surface_extension_get_extended_surface(
                 c->surface_extension, data->surface);

         QtExtendedSurface_Subscribe(data->extended_surface, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION);
         QtExtendedSurface_Subscribe(data->extended_surface, SDL_HINT_QTWAYLAND_WINDOW_FLAGS);
     }
 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

     data->egl_window = WAYLAND_wl_egl_window_create(data->surface,
                                             window->w, window->h);

     /* Create the GLES window surface */
     data->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType) data->egl_window);

     if (data->egl_surface == EGL_NO_SURFACE) {
         return SDL_SetError("failed to create a window surface");
     }

     if (data->shell_surface) {
         wl_shell_surface_set_user_data(data->shell_surface, data);
         wl_shell_surface_add_listener(data->shell_surface,
                                       &shell_surface_listener, data);
     }

 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
     if (data->extended_surface) {
         qt_extended_surface_set_user_data(data->extended_surface, data);
         qt_extended_surface_add_listener(data->extended_surface,
                                          &extended_surface_listener, data);
     }
 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

     region = wl_compositor_create_region(c->compositor);
     wl_region_add(region, 0, 0, window->w, window->h);
     wl_surface_set_opaque_region(data->surface, region);
     wl_region_destroy(region);

     if (c->relative_mouse_mode) {
         Wayland_input_lock_pointer(c->input);
     }

     WAYLAND_wl_display_flush(c->display);

     return 0;
 }

 void Wayland_SetWindowSize(_THIS, SDL_Window * window)
 {
     SDL_VideoData *data = _this->driverdata;
     SDL_WindowData *wind = window->driverdata;
     struct wl_region *region;

     WAYLAND_wl_egl_window_resize(wind->egl_window, window->w, window->h, 0, 0);

     region =wl_compositor_create_region(data->compositor);
     wl_region_add(region, 0, 0, window->w, window->h);
     wl_surface_set_opaque_region(wind->surface, region);
     wl_region_destroy(region);
 }

 void Wayland_SetWindowTitle(_THIS, SDL_Window * window)
 {
     SDL_WindowData *wind = window->driverdata;

     if (window->title != NULL) {
         wl_shell_surface_set_title(wind->shell_surface, window->title);
     }

     WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
 }

 void Wayland_DestroyWindow(_THIS, SDL_Window *window)
 {
     SDL_VideoData *data = _this->driverdata;
     SDL_WindowData *wind = window->driverdata;

     if (data) {
         SDL_EGL_DestroySurface(_this, wind->egl_surface);
         WAYLAND_wl_egl_window_destroy(wind->egl_window);

         if (wind->shell_surface)
             wl_shell_surface_destroy(wind->shell_surface);

 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
         if (wind->extended_surface) {
             QtExtendedSurface_Unsubscribe(wind->extended_surface, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION);
             QtExtendedSurface_Unsubscribe(wind->extended_surface, SDL_HINT_QTWAYLAND_WINDOW_FLAGS);
             qt_extended_surface_destroy(wind->extended_surface);
         }
 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
         wl_surface_destroy(wind->surface);

         SDL_free(wind);
         WAYLAND_wl_display_flush(data->display);
     }
     window->driverdata = NULL;
 }

 #endif /* SDL_VIDEO_DRIVER_WAYLAND && SDL_VIDEO_OPENGL_EGL */

 /* vi: set ts=4 sw=4 expandtab: */
	/*
	Simple DirectMedia Layer
	Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.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.
	*/

	#include "../../SDL_internal.h"

	#if SDL_VIDEO_DRIVER_WAYLAND && SDL_VIDEO_OPENGL_EGL

	#include "../SDL_sysvideo.h"
	#include "../../events/SDL_windowevents_c.h"
	#include "../SDL_egl_c.h"
	#include "SDL_waylandevents_c.h"
	#include "SDL_waylandwindow.h"
	#include "SDL_waylandvideo.h"
	#include "SDL_waylandtouch.h"
	#include "SDL_waylanddyn.h"
	#include "SDL_hints.h"

	static void
	handle_ping(void data, struct wl_shell_surface shell_surface,
	uint32_t serial)
	{
	wl_shell_surface_pong(shell_surface, serial);
	}

	static void
	handle_configure(void data, struct wl_shell_surface shell_surface,
	uint32_t edges, int32_t width, int32_t height)
	{
	SDL_WindowData wind = (SDL_WindowData )data;
	SDL_Window *window = wind->sdlwindow;
	struct wl_region *region;

	/* wl_shell_surface spec states that this is a suggestion.
	Ignore if less than or greater than max/min size. */

	if (width == 0 \|\| height == 0) {
	return;
	}

	if (!(window->flags & SDL_WINDOW_FULLSCREEN)) {
	if ((window->flags & SDL_WINDOW_RESIZABLE)) {
	if (window->max_w > 0) {
	width = SDL_min(width, window->max_w);
	}
	width = SDL_max(width, window->min_w);

	if (window->max_h > 0) {
	height = SDL_min(height, window->max_h);
	}
	height = SDL_max(height, window->min_h);
	} else {
	return;
	}
	}

	if (width == window->w && height == window->h) {
	return;
	}

	window->w = width;
	window->h = height;
	WAYLAND_wl_egl_window_resize(wind->egl_window, window->w, window->h, 0, 0);

	region = wl_compositor_create_region(wind->waylandData->compositor);
	wl_region_add(region, 0, 0, window->w, window->h);
	wl_surface_set_opaque_region(wind->surface, region);
	wl_region_destroy(region);
	SDL_SendWindowEvent(window, SDL_WINDOWEVENT_RESIZED, window->w, window->h);
	}

	static void
	handle_popup_done(void data, struct wl_shell_surface shell_surface)
	{
	}

	static const struct wl_shell_surface_listener shell_surface_listener = {
	handle_ping,
	handle_configure,
	handle_popup_done
	};

	#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
	static void
	handle_onscreen_visibility(void *data,
	struct qt_extended_surface *qt_extended_surface, int32_t visible)
	{
	}

	static void
	handle_set_generic_property(void *data,
	struct qt_extended_surface qt_extended_surface, const char name,
	struct wl_array *value)
	{
	}

	static void
	handle_close(void data, struct qt_extended_surface qt_extended_surface)
	{
	SDL_WindowData window = (SDL_WindowData )data;
	SDL_SendWindowEvent(window->sdlwindow, SDL_WINDOWEVENT_CLOSE, 0, 0);
	}

	static const struct qt_extended_surface_listener extended_surface_listener = {
	handle_onscreen_visibility,
	handle_set_generic_property,
	handle_close,
	};
	#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

	SDL_bool
	Wayland_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
	{
	SDL_WindowData data = (SDL_WindowData ) window->driverdata;
	const Uint32 version = ((((Uint32) info->version.major) * 1000000) +
	(((Uint32) info->version.minor) * 10000) +
	(((Uint32) info->version.patch)));

	/* Before 2.0.6, it was possible to build an SDL with Wayland support
	(SDL_SysWMinfo will be large enough to hold Wayland info), but build
	your app against SDL headers that didn't have Wayland support
	(SDL_SysWMinfo could be smaller than Wayland needs. This would lead
	to an app properly using SDL_GetWindowWMInfo() but we'd accidentally
	overflow memory on the stack or heap. To protect against this, we've
	padded out the struct unconditionally in the headers and Wayland will
	just return an error for older apps using this function. Those apps
	will need to be recompiled against newer headers or not use Wayland,
	maybe by forcing SDL_VIDEODRIVER=x11. */
	if (version < 2000006) {
	info->subsystem = SDL_SYSWM_UNKNOWN;
	SDL_SetError("Version must be 2.0.6 or newer");
	return SDL_FALSE;
	}

	info->info.wl.display = data->waylandData->display;
	info->info.wl.surface = data->surface;
	info->info.wl.shell_surface = data->shell_surface;
	info->subsystem = SDL_SYSWM_WAYLAND;

	return SDL_TRUE;
	}

	int
	Wayland_SetWindowHitTest(SDL_Window *window, SDL_bool enabled)
	{
	return 0; /* just succeed, the real work is done elsewhere. */
	}

	void Wayland_ShowWindow(_THIS, SDL_Window *window)
	{
	SDL_WindowData *wind = window->driverdata;

	if (window->flags & SDL_WINDOW_FULLSCREEN)
	wl_shell_surface_set_fullscreen(wind->shell_surface,
	WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT,
	0, (struct wl_output *)window->fullscreen_mode.driverdata);
	else
	wl_shell_surface_set_toplevel(wind->shell_surface);

	WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
	}

	#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
	static void QtExtendedSurface_OnHintChanged(void userdata, const char name,
	const char oldValue, const char newValue)
	{
	struct qt_extended_surface *qt_extended_surface = userdata;

	if (name == NULL) {
	return;
	}

	if (strcmp(name, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION) == 0) {
	int32_t orientation = QT_EXTENDED_SURFACE_ORIENTATION_PRIMARYORIENTATION;

	if (newValue != NULL) {
	if (strcmp(newValue, "portrait") == 0) {
	orientation = QT_EXTENDED_SURFACE_ORIENTATION_PORTRAITORIENTATION;
	} else if (strcmp(newValue, "landscape") == 0) {
	orientation = QT_EXTENDED_SURFACE_ORIENTATION_LANDSCAPEORIENTATION;
	} else if (strcmp(newValue, "inverted-portrait") == 0) {
	orientation = QT_EXTENDED_SURFACE_ORIENTATION_INVERTEDPORTRAITORIENTATION;
	} else if (strcmp(newValue, "inverted-landscape") == 0) {
	orientation = QT_EXTENDED_SURFACE_ORIENTATION_INVERTEDLANDSCAPEORIENTATION;
	}
	}

	qt_extended_surface_set_content_orientation(qt_extended_surface, orientation);
	} else if (strcmp(name, SDL_HINT_QTWAYLAND_WINDOW_FLAGS) == 0) {
	uint32_t flags = 0;

	if (newValue != NULL) {
	char *tmp = strdup(newValue);
	char *saveptr = NULL;

	char *flag = strtok_r(tmp, " ", &saveptr);
	while (flag) {
	if (strcmp(flag, "OverridesSystemGestures") == 0) {
	flags \|= QT_EXTENDED_SURFACE_WINDOWFLAG_OVERRIDESSYSTEMGESTURES;
	} else if (strcmp(flag, "StaysOnTop") == 0) {
	flags \|= QT_EXTENDED_SURFACE_WINDOWFLAG_STAYSONTOP;
	} else if (strcmp(flag, "BypassWindowManager") == 0) {
	// See https://github.com/qtproject/qtwayland/commit/fb4267103d
	flags \|= 4 /* QT_EXTENDED_SURFACE_WINDOWFLAG_BYPASSWINDOWMANAGER */;
	}

	flag = strtok_r(NULL, " ", &saveptr);
	}

	free(tmp);
	}

	qt_extended_surface_set_window_flags(qt_extended_surface, flags);
	}
	}

	static void QtExtendedSurface_Subscribe(struct qt_extended_surface surface, const char name)
	{
	SDL_AddHintCallback(name, QtExtendedSurface_OnHintChanged, surface);
	}

	static void QtExtendedSurface_Unsubscribe(struct qt_extended_surface surface, const char name)
	{
	SDL_DelHintCallback(name, QtExtendedSurface_OnHintChanged, surface);
	}
	#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

	void
	Wayland_SetWindowFullscreen(_THIS, SDL_Window * window,
	SDL_VideoDisplay * _display, SDL_bool fullscreen)
	{
	SDL_WindowData *wind = window->driverdata;

	if (fullscreen)
	wl_shell_surface_set_fullscreen(wind->shell_surface,
	WL_SHELL_SURFACE_FULLSCREEN_METHOD_SCALE,
	0, (struct wl_output *)_display->driverdata);
	else
	wl_shell_surface_set_toplevel(wind->shell_surface);

	WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
	}

	void
	Wayland_RestoreWindow(_THIS, SDL_Window * window)
	{
	SDL_WindowData *wind = window->driverdata;

	wl_shell_surface_set_toplevel(wind->shell_surface);

	WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
	}

	void
	Wayland_MaximizeWindow(_THIS, SDL_Window * window)
	{
	SDL_WindowData *wind = window->driverdata;

	wl_shell_surface_set_maximized(wind->shell_surface, NULL);

	WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
	}

	int Wayland_CreateWindow(_THIS, SDL_Window *window)
	{
	SDL_WindowData *data;
	SDL_VideoData *c;
	struct wl_region *region;

	data = calloc(1, sizeof *data);
	if (data == NULL)
	return SDL_OutOfMemory();

	c = _this->driverdata;
	window->driverdata = data;

	if (!(window->flags & SDL_WINDOW_OPENGL)) {
	SDL_GL_LoadLibrary(NULL);
	window->flags \|= SDL_WINDOW_OPENGL;
	}

	if (window->x == SDL_WINDOWPOS_UNDEFINED) {
	window->x = 0;
	}
	if (window->y == SDL_WINDOWPOS_UNDEFINED) {
	window->y = 0;
	}

	data->waylandData = c;
	data->sdlwindow = window;

	data->surface =
	wl_compositor_create_surface(c->compositor);
	wl_surface_set_user_data(data->surface, data);
	data->shell_surface = wl_shell_get_shell_surface(c->shell,
	data->surface);
	wl_shell_surface_set_class (data->shell_surface, c->classname);
	#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
	if (c->surface_extension) {
	data->extended_surface = qt_surface_extension_get_extended_surface(
	c->surface_extension, data->surface);

	QtExtendedSurface_Subscribe(data->extended_surface, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION);
	QtExtendedSurface_Subscribe(data->extended_surface, SDL_HINT_QTWAYLAND_WINDOW_FLAGS);
	}
	#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

	data->egl_window = WAYLAND_wl_egl_window_create(data->surface,
	window->w, window->h);

	/* Create the GLES window surface */
	data->egl_surface = SDL_EGL_CreateSurface(_this, (NativeWindowType) data->egl_window);

	if (data->egl_surface == EGL_NO_SURFACE) {
	return SDL_SetError("failed to create a window surface");
	}

	if (data->shell_surface) {
	wl_shell_surface_set_user_data(data->shell_surface, data);
	wl_shell_surface_add_listener(data->shell_surface,
	&shell_surface_listener, data);
	}

	#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
	if (data->extended_surface) {
	qt_extended_surface_set_user_data(data->extended_surface, data);
	qt_extended_surface_add_listener(data->extended_surface,
	&extended_surface_listener, data);
	}
	#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */

	region = wl_compositor_create_region(c->compositor);
	wl_region_add(region, 0, 0, window->w, window->h);
	wl_surface_set_opaque_region(data->surface, region);
	wl_region_destroy(region);

	if (c->relative_mouse_mode) {
	Wayland_input_lock_pointer(c->input);
	}

	WAYLAND_wl_display_flush(c->display);

	return 0;
	}

	void Wayland_SetWindowSize(_THIS, SDL_Window * window)
	{
	SDL_VideoData *data = _this->driverdata;
	SDL_WindowData *wind = window->driverdata;
	struct wl_region *region;

	WAYLAND_wl_egl_window_resize(wind->egl_window, window->w, window->h, 0, 0);

	region =wl_compositor_create_region(data->compositor);
	wl_region_add(region, 0, 0, window->w, window->h);
	wl_surface_set_opaque_region(wind->surface, region);
	wl_region_destroy(region);
	}

	void Wayland_SetWindowTitle(_THIS, SDL_Window * window)
	{
	SDL_WindowData *wind = window->driverdata;

	if (window->title != NULL) {
	wl_shell_surface_set_title(wind->shell_surface, window->title);
	}

	WAYLAND_wl_display_flush( ((SDL_VideoData*)_this->driverdata)->display );
	}

	void Wayland_DestroyWindow(_THIS, SDL_Window *window)
	{
	SDL_VideoData *data = _this->driverdata;
	SDL_WindowData *wind = window->driverdata;

	if (data) {
	SDL_EGL_DestroySurface(_this, wind->egl_surface);
	WAYLAND_wl_egl_window_destroy(wind->egl_window);

	if (wind->shell_surface)
	wl_shell_surface_destroy(wind->shell_surface);

	#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
	if (wind->extended_surface) {
	QtExtendedSurface_Unsubscribe(wind->extended_surface, SDL_HINT_QTWAYLAND_CONTENT_ORIENTATION);
	QtExtendedSurface_Unsubscribe(wind->extended_surface, SDL_HINT_QTWAYLAND_WINDOW_FLAGS);
	qt_extended_surface_destroy(wind->extended_surface);
	}
	#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
	wl_surface_destroy(wind->surface);

	SDL_free(wind);
	WAYLAND_wl_display_flush(data->display);
	}
	window->driverdata = NULL;
	}

	#endif /* SDL_VIDEO_DRIVER_WAYLAND && SDL_VIDEO_OPENGL_EGL */

	/* vi: set ts=4 sw=4 expandtab: */