src/video/wayland/SDL_waylandtouch.c
author Gabriel Jacobo <gabomdq@gmail.com>
Thu, 09 Jan 2014 13:56:21 -0300
changeset 8104 2e4f1bd21196
parent 8082 5b83ad3f01ac
child 8149 681eb46b8ac4
permissions -rw-r--r--
Dynamic loading support for Wayland
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2013 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 /* Contributed by Thomas Perl <thomas.perl@jollamobile.com> */
    23 
    24 #include "../../SDL_internal.h"
    25 
    26 #ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH
    27 
    28 #include "SDL_waylandtouch.h"
    29 #include "SDL_log.h"
    30 #include "../../events/SDL_touch_c.h"
    31 
    32 struct SDL_WaylandTouch {
    33     struct qt_touch_extension *touch_extension;
    34 };
    35 
    36 
    37 /**
    38  * Qt TouchPointState
    39  * adapted from qtbase/src/corelib/global/qnamespace.h
    40  **/
    41 enum QtWaylandTouchPointState {
    42     QtWaylandTouchPointPressed    = 0x01,
    43     QtWaylandTouchPointMoved      = 0x02,
    44     /*
    45     Never sent by the server:
    46     QtWaylandTouchPointStationary = 0x04,
    47     */
    48     QtWaylandTouchPointReleased   = 0x08,
    49 };
    50 
    51 static void
    52 touch_handle_touch(void *data,
    53         struct qt_touch_extension *qt_touch_extension,
    54         uint32_t time,
    55         uint32_t id,
    56         uint32_t state,
    57         int32_t x,
    58         int32_t y,
    59         int32_t normalized_x,
    60         int32_t normalized_y,
    61         int32_t width,
    62         int32_t height,
    63         uint32_t pressure,
    64         int32_t velocity_x,
    65         int32_t velocity_y,
    66         uint32_t flags,
    67         struct wl_array *rawdata)
    68 {
    69     /**
    70      * Event is assembled in QtWayland in TouchExtensionGlobal::postTouchEvent
    71      * (src/compositor/wayland_wrapper/qwltouch.cpp)
    72      **/
    73 
    74     float FIXED_TO_FLOAT = 1. / 10000.;
    75     float xf = FIXED_TO_FLOAT * x;
    76     float yf = FIXED_TO_FLOAT * y;
    77 
    78     float PRESSURE_TO_FLOAT = 1. / 255.;
    79     float pressuref = PRESSURE_TO_FLOAT * pressure;
    80 
    81     uint32_t touchState = state & 0xFFFF;
    82     /*
    83     Other fields that are sent by the server (qwltouch.cpp),
    84     but not used at the moment can be decoded in this way:
    85 
    86     uint32_t sentPointCount = state >> 16;
    87     uint32_t touchFlags = flags & 0xFFFF;
    88     uint32_t capabilities = flags >> 16;
    89     */
    90 
    91     SDL_TouchID deviceId = 0;
    92     if (!SDL_GetTouch(deviceId)) {
    93         if (SDL_AddTouch(deviceId, "qt_touch_extension") < 0) {
    94              SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
    95         }
    96     }
    97 
    98     switch (touchState) {
    99         case QtWaylandTouchPointPressed:
   100         case QtWaylandTouchPointReleased:
   101             SDL_SendTouch(deviceId, (SDL_FingerID)id,
   102                     (touchState == QtWaylandTouchPointPressed) ? SDL_TRUE : SDL_FALSE,
   103                     xf, yf, pressuref);
   104             break;
   105         case QtWaylandTouchPointMoved:
   106             SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, xf, yf, pressuref);
   107             break;
   108         default:
   109             /* Should not happen */
   110             break;
   111     }
   112 }
   113 
   114 static void
   115 touch_handle_configure(void *data,
   116         struct qt_touch_extension *qt_touch_extension,
   117         uint32_t flags)
   118 {
   119 }
   120 
   121 
   122 /* wayland-qt-touch-extension.c BEGINS */
   123 
   124 static const struct qt_touch_extension_listener touch_listener = {
   125     touch_handle_touch,
   126     touch_handle_configure,
   127 };
   128 
   129 static const struct wl_interface *qt_touch_extension_types[] = {
   130     NULL,
   131     NULL,
   132     NULL,
   133     NULL,
   134     NULL,
   135     NULL,
   136     NULL,
   137     NULL,
   138     NULL,
   139     NULL,
   140     NULL,
   141     NULL,
   142     NULL,
   143     NULL,
   144 };
   145 
   146 static const struct wl_message qt_touch_extension_requests[] = {
   147     { "dummy", "", qt_touch_extension_types + 0 },
   148 };
   149 
   150 static const struct wl_message qt_touch_extension_events[] = {
   151     { "touch", "uuuiiiiiiuiiua", qt_touch_extension_types + 0 },
   152     { "configure", "u", qt_touch_extension_types + 0 },
   153 };
   154 
   155 WL_EXPORT const struct wl_interface qt_touch_extension_interface = {
   156     "qt_touch_extension", 1,
   157     1, qt_touch_extension_requests,
   158     2, qt_touch_extension_events,
   159 };
   160 
   161 /* wayland-qt-touch-extension.c ENDS */
   162 
   163 /* wayland-qt-windowmanager.c BEGINS */
   164 static const struct wl_interface *qt_windowmanager_types[] = {
   165     NULL,
   166     NULL,
   167 };
   168 
   169 static const struct wl_message qt_windowmanager_requests[] = {
   170     { "open_url", "us", qt_windowmanager_types + 0 },
   171 };
   172 
   173 static const struct wl_message qt_windowmanager_events[] = {
   174     { "hints", "i", qt_windowmanager_types + 0 },
   175     { "quit", "", qt_windowmanager_types + 0 },
   176 };
   177 
   178 WL_EXPORT const struct wl_interface qt_windowmanager_interface = {
   179     "qt_windowmanager", 1,
   180     1, qt_windowmanager_requests,
   181     2, qt_windowmanager_events,
   182 };
   183 /* wayland-qt-windowmanager.c ENDS */
   184 
   185 /* wayland-qt-surface-extension.c BEGINS */
   186 extern const struct wl_interface qt_extended_surface_interface;
   187 #ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
   188 extern const struct wl_interface wl_surface_interface;
   189 #endif
   190 
   191 static const struct wl_interface *qt_surface_extension_types[] = {
   192     NULL,
   193     NULL,
   194     &qt_extended_surface_interface,
   195 #ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
   196     /* FIXME: Set this dynamically to (*WAYLAND_wl_surface_interface) ? 
   197      * The value comes from auto generated code and does 
   198      * not appear to actually be used anywhere
   199      */
   200     NULL, 
   201 #else
   202     &wl_surface_interface,
   203 #endif    
   204 };
   205 
   206 static const struct wl_message qt_surface_extension_requests[] = {
   207     { "get_extended_surface", "no", qt_surface_extension_types + 2 },
   208 };
   209 
   210 WL_EXPORT const struct wl_interface qt_surface_extension_interface = {
   211     "qt_surface_extension", 1,
   212     1, qt_surface_extension_requests,
   213     0, NULL,
   214 };
   215 
   216 static const struct wl_message qt_extended_surface_requests[] = {
   217     { "update_generic_property", "sa", qt_surface_extension_types + 0 },
   218     { "set_content_orientation", "i", qt_surface_extension_types + 0 },
   219     { "set_window_flags", "i", qt_surface_extension_types + 0 },
   220 };
   221 
   222 static const struct wl_message qt_extended_surface_events[] = {
   223     { "onscreen_visibility", "i", qt_surface_extension_types + 0 },
   224     { "set_generic_property", "sa", qt_surface_extension_types + 0 },
   225     { "close", "", qt_surface_extension_types + 0 },
   226 };
   227 
   228 WL_EXPORT const struct wl_interface qt_extended_surface_interface = {
   229     "qt_extended_surface", 1,
   230     3, qt_extended_surface_requests,
   231     3, qt_extended_surface_events,
   232 };
   233 
   234 /* wayland-qt-surface-extension.c ENDS */
   235 
   236 void
   237 Wayland_touch_create(SDL_VideoData *data, uint32_t id)
   238 {
   239     if (data->touch) {
   240         Wayland_touch_destroy(data);
   241     }
   242 
   243     data->touch = malloc(sizeof(struct SDL_WaylandTouch));
   244 
   245     struct SDL_WaylandTouch *touch = data->touch;
   246     touch->touch_extension = wl_registry_bind(data->registry, id, &qt_touch_extension_interface, 1);
   247     qt_touch_extension_add_listener(touch->touch_extension, &touch_listener, data);
   248 }
   249 
   250 void
   251 Wayland_touch_destroy(SDL_VideoData *data)
   252 {
   253     if (data->touch) {
   254         struct SDL_WaylandTouch *touch = data->touch;
   255         if (touch->touch_extension) {
   256             qt_touch_extension_destroy(touch->touch_extension);
   257         }
   258 
   259         free(data->touch);
   260         data->touch = NULL;
   261     }
   262 }
   263 
   264 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */