src/video/wayland/SDL_waylandvideo.c
author Sam Lantinga <slouken@libsdl.org>
Sat, 02 Jan 2016 10:10:34 -0800
changeset 9998 f67cf37e9cd4
parent 9619 b94b6d0bff0f
child 10119 ac9831ff70d1
permissions -rw-r--r--
Updated copyright to 2016
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 #include "../../SDL_internal.h"
    23 
    24 #if SDL_VIDEO_DRIVER_WAYLAND
    25 
    26 #include "SDL_video.h"
    27 #include "SDL_mouse.h"
    28 #include "SDL_stdinc.h"
    29 #include "../../events/SDL_events_c.h"
    30 
    31 #include "SDL_waylandvideo.h"
    32 #include "SDL_waylandevents_c.h"
    33 #include "SDL_waylandwindow.h"
    34 #include "SDL_waylandopengles.h"
    35 #include "SDL_waylandmouse.h"
    36 #include "SDL_waylandtouch.h"
    37 
    38 #include <fcntl.h>
    39 #include <xkbcommon/xkbcommon.h>
    40 
    41 #include "SDL_waylanddyn.h"
    42 #include <wayland-util.h>
    43 
    44 #define WAYLANDVID_DRIVER_NAME "wayland"
    45 
    46 /* Initialization/Query functions */
    47 static int
    48 Wayland_VideoInit(_THIS);
    49 
    50 static void
    51 Wayland_GetDisplayModes(_THIS, SDL_VideoDisplay *sdl_display);
    52 static int
    53 Wayland_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode);
    54 
    55 static void
    56 Wayland_VideoQuit(_THIS);
    57 
    58 /* Wayland driver bootstrap functions */
    59 static int
    60 Wayland_Available(void)
    61 {
    62     struct wl_display *display = NULL;
    63     if (SDL_WAYLAND_LoadSymbols()) {
    64         display = WAYLAND_wl_display_connect(NULL);
    65         if (display != NULL) {
    66             WAYLAND_wl_display_disconnect(display);
    67         }
    68         SDL_WAYLAND_UnloadSymbols();
    69     }
    70 
    71     return (display != NULL);
    72 }
    73 
    74 static void
    75 Wayland_DeleteDevice(SDL_VideoDevice *device)
    76 {
    77     SDL_free(device);
    78     SDL_WAYLAND_UnloadSymbols();
    79 }
    80 
    81 static SDL_VideoDevice *
    82 Wayland_CreateDevice(int devindex)
    83 {
    84     SDL_VideoDevice *device;
    85 
    86     if (!SDL_WAYLAND_LoadSymbols()) {
    87         return NULL;
    88     }
    89 
    90     /* Initialize all variables that we clean on shutdown */
    91     device = SDL_calloc(1, sizeof(SDL_VideoDevice));
    92     if (!device) {
    93         SDL_WAYLAND_UnloadSymbols();
    94         SDL_OutOfMemory();
    95         return NULL;
    96     }
    97 
    98     /* Set the function pointers */
    99     device->VideoInit = Wayland_VideoInit;
   100     device->VideoQuit = Wayland_VideoQuit;
   101     device->SetDisplayMode = Wayland_SetDisplayMode;
   102     device->GetDisplayModes = Wayland_GetDisplayModes;
   103     device->GetWindowWMInfo = Wayland_GetWindowWMInfo;
   104 
   105     device->PumpEvents = Wayland_PumpEvents;
   106 
   107     device->GL_SwapWindow = Wayland_GLES_SwapWindow;
   108     device->GL_GetSwapInterval = Wayland_GLES_GetSwapInterval;
   109     device->GL_SetSwapInterval = Wayland_GLES_SetSwapInterval;
   110     device->GL_MakeCurrent = Wayland_GLES_MakeCurrent;
   111     device->GL_CreateContext = Wayland_GLES_CreateContext;
   112     device->GL_LoadLibrary = Wayland_GLES_LoadLibrary;
   113     device->GL_UnloadLibrary = Wayland_GLES_UnloadLibrary;
   114     device->GL_GetProcAddress = Wayland_GLES_GetProcAddress;
   115     device->GL_DeleteContext = Wayland_GLES_DeleteContext;
   116 
   117     device->CreateWindow = Wayland_CreateWindow;
   118     device->ShowWindow = Wayland_ShowWindow;
   119     device->SetWindowFullscreen = Wayland_SetWindowFullscreen;
   120     device->SetWindowSize = Wayland_SetWindowSize;
   121     device->DestroyWindow = Wayland_DestroyWindow;
   122     device->SetWindowHitTest = Wayland_SetWindowHitTest;
   123 
   124     device->free = Wayland_DeleteDevice;
   125 
   126     return device;
   127 }
   128 
   129 VideoBootStrap Wayland_bootstrap = {
   130     WAYLANDVID_DRIVER_NAME, "SDL Wayland video driver",
   131     Wayland_Available, Wayland_CreateDevice
   132 };
   133 
   134 static void
   135 display_handle_geometry(void *data,
   136                         struct wl_output *output,
   137                         int x, int y,
   138                         int physical_width,
   139                         int physical_height,
   140                         int subpixel,
   141                         const char *make,
   142                         const char *model,
   143                         int transform)
   144 
   145 {
   146     SDL_VideoDisplay *display = data;
   147 
   148     display->name = strdup(model);
   149     display->driverdata = output;
   150 }
   151 
   152 static void
   153 display_handle_mode(void *data,
   154                     struct wl_output *output,
   155                     uint32_t flags,
   156                     int width,
   157                     int height,
   158                     int refresh)
   159 {
   160     SDL_VideoDisplay *display = data;
   161     SDL_DisplayMode mode;
   162 
   163     SDL_zero(mode);
   164     mode.w = width;
   165     mode.h = height;
   166     mode.refresh_rate = refresh / 1000; // mHz to Hz
   167     SDL_AddDisplayMode(display, &mode);
   168 
   169     if (flags & WL_OUTPUT_MODE_CURRENT) {
   170         display->current_mode = mode;
   171         display->desktop_mode = mode;
   172     }
   173 }
   174 
   175 static void
   176 display_handle_done(void *data,
   177                     struct wl_output *output)
   178 {
   179     SDL_VideoDisplay *display = data;
   180     SDL_AddVideoDisplay(display);
   181     SDL_free(display->name);
   182     SDL_free(display);
   183 }
   184 
   185 static void
   186 display_handle_scale(void *data,
   187                      struct wl_output *output,
   188                      int32_t factor)
   189 {
   190     // TODO: do HiDPI stuff.
   191 }
   192 
   193 static const struct wl_output_listener output_listener = {
   194     display_handle_geometry,
   195     display_handle_mode,
   196     display_handle_done,
   197     display_handle_scale
   198 };
   199 
   200 static void
   201 Wayland_add_display(SDL_VideoData *d, uint32_t id)
   202 {
   203     struct wl_output *output;
   204     SDL_VideoDisplay *display = SDL_malloc(sizeof *display);
   205     if (!display) {
   206         SDL_OutOfMemory();
   207         return;
   208     }
   209     SDL_zero(*display);
   210 
   211     output = wl_registry_bind(d->registry, id, &wl_output_interface, 2);
   212     if (!output) {
   213         SDL_SetError("Failed to retrieve output.");
   214         return;
   215     }
   216 
   217     wl_output_add_listener(output, &output_listener, display);
   218 }
   219 
   220 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
   221 static void
   222 windowmanager_hints(void *data, struct qt_windowmanager *qt_windowmanager,
   223         int32_t show_is_fullscreen)
   224 {
   225 }
   226 
   227 static void
   228 windowmanager_quit(void *data, struct qt_windowmanager *qt_windowmanager)
   229 {
   230     SDL_SendQuit();
   231 }
   232 
   233 static const struct qt_windowmanager_listener windowmanager_listener = {
   234     windowmanager_hints,
   235     windowmanager_quit,
   236 };
   237 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
   238 
   239 static void
   240 display_handle_global(void *data, struct wl_registry *registry, uint32_t id,
   241                       const char *interface, uint32_t version)
   242 {
   243     SDL_VideoData *d = data;
   244 
   245     if (strcmp(interface, "wl_compositor") == 0) {
   246         d->compositor = wl_registry_bind(d->registry, id, &wl_compositor_interface, 1);
   247     } else if (strcmp(interface, "wl_output") == 0) {
   248         Wayland_add_display(d, id);
   249     } else if (strcmp(interface, "wl_seat") == 0) {
   250         Wayland_display_add_input(d, id);
   251     } else if (strcmp(interface, "wl_shell") == 0) {
   252         d->shell = wl_registry_bind(d->registry, id, &wl_shell_interface, 1);
   253     } else if (strcmp(interface, "wl_shm") == 0) {
   254         d->shm = wl_registry_bind(registry, id, &wl_shm_interface, 1);
   255         d->cursor_theme = WAYLAND_wl_cursor_theme_load(NULL, 32, d->shm);
   256         d->default_cursor = WAYLAND_wl_cursor_theme_get_cursor(d->cursor_theme, "left_ptr");
   257 
   258 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
   259     } else if (strcmp(interface, "qt_touch_extension") == 0) {
   260         Wayland_touch_create(d, id);
   261     } else if (strcmp(interface, "qt_surface_extension") == 0) {
   262         d->surface_extension = wl_registry_bind(registry, id,
   263                 &qt_surface_extension_interface, 1);
   264     } else if (strcmp(interface, "qt_windowmanager") == 0) {
   265         d->windowmanager = wl_registry_bind(registry, id,
   266                 &qt_windowmanager_interface, 1);
   267         qt_windowmanager_add_listener(d->windowmanager, &windowmanager_listener, d);
   268 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
   269     }
   270 }
   271 
   272 static const struct wl_registry_listener registry_listener = {
   273     display_handle_global
   274 };
   275 
   276 int
   277 Wayland_VideoInit(_THIS)
   278 {
   279     SDL_VideoData *data = SDL_malloc(sizeof *data);
   280     if (data == NULL)
   281         return SDL_OutOfMemory();
   282     memset(data, 0, sizeof *data);
   283 
   284     _this->driverdata = data;
   285 
   286     data->display = WAYLAND_wl_display_connect(NULL);
   287     if (data->display == NULL) {
   288         return SDL_SetError("Failed to connect to a Wayland display");
   289     }
   290 
   291     data->registry = wl_display_get_registry(data->display);
   292     if (data->registry == NULL) {
   293         return SDL_SetError("Failed to get the Wayland registry");
   294     }
   295 
   296     wl_registry_add_listener(data->registry, &registry_listener, data);
   297 
   298     // First roundtrip to receive all registry objects.
   299     WAYLAND_wl_display_roundtrip(data->display);
   300 
   301     // Second roundtrip to receive all output events.
   302     WAYLAND_wl_display_roundtrip(data->display);
   303 
   304     data->xkb_context = WAYLAND_xkb_context_new(0);
   305     if (!data->xkb_context) {
   306         return SDL_SetError("Failed to create XKB context");
   307     }
   308 
   309     Wayland_InitMouse();
   310 
   311     WAYLAND_wl_display_flush(data->display);
   312 
   313     return 0;
   314 }
   315 
   316 static void
   317 Wayland_GetDisplayModes(_THIS, SDL_VideoDisplay *sdl_display)
   318 {
   319     // Nothing to do here, everything was already done in the wl_output
   320     // callbacks.
   321 }
   322 
   323 static int
   324 Wayland_SetDisplayMode(_THIS, SDL_VideoDisplay *display, SDL_DisplayMode *mode)
   325 {
   326     return SDL_Unsupported();
   327 }
   328 
   329 void
   330 Wayland_VideoQuit(_THIS)
   331 {
   332     SDL_VideoData *data = _this->driverdata;
   333     int i;
   334 
   335     Wayland_FiniMouse ();
   336 
   337     for (i = 0; i < _this->num_displays; ++i) {
   338         SDL_VideoDisplay *display = &_this->displays[i];
   339         wl_output_destroy(display->driverdata);
   340         display->driverdata = NULL;
   341     }
   342 
   343     Wayland_display_destroy_input(data);
   344 
   345     if (data->xkb_context) {
   346         WAYLAND_xkb_context_unref(data->xkb_context);
   347         data->xkb_context = NULL;
   348     }
   349 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
   350     if (data->windowmanager)
   351         qt_windowmanager_destroy(data->windowmanager);
   352 
   353     if (data->surface_extension)
   354         qt_surface_extension_destroy(data->surface_extension);
   355 
   356     Wayland_touch_destroy(data);
   357 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
   358 
   359     if (data->shm)
   360         wl_shm_destroy(data->shm);
   361 
   362     if (data->cursor_theme)
   363         WAYLAND_wl_cursor_theme_destroy(data->cursor_theme);
   364 
   365     if (data->shell)
   366         wl_shell_destroy(data->shell);
   367 
   368     if (data->compositor)
   369         wl_compositor_destroy(data->compositor);
   370 
   371     if (data->registry)
   372         wl_registry_destroy(data->registry);
   373 
   374     if (data->display) {
   375         WAYLAND_wl_display_flush(data->display);
   376         WAYLAND_wl_display_disconnect(data->display);
   377     }
   378 
   379     free(data);
   380     _this->driverdata = NULL;
   381 }
   382 
   383 #endif /* SDL_VIDEO_DRIVER_WAYLAND */
   384 
   385 /* vi: set ts=4 sw=4 expandtab: */