src/video/wayland/SDL_waylandtouch.c

   1 /*
   2   Simple DirectMedia Layer
   3   Copyright (C) 1997-2018 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_log.h"
  29 #include "SDL_waylandtouch.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 = 1;
  92         if (SDL_AddTouch(deviceId, "qt_touch_extension") < 0) {
  93                  SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
  94         }
  95
  96     switch (touchState) {
  97         case QtWaylandTouchPointPressed:
  98         case QtWaylandTouchPointReleased:
  99             SDL_SendTouch(deviceId, (SDL_FingerID)id,
 100                     (touchState == QtWaylandTouchPointPressed) ? SDL_TRUE : SDL_FALSE,
 101                     xf, yf, pressuref);
 102             break;
 103         case QtWaylandTouchPointMoved:
 104             SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, xf, yf, pressuref);
 105             break;
 106         default:
 107             /* Should not happen */
 108             break;
 109     }
 110 }
 111
 112 static void
 113 touch_handle_configure(void *data,
 114         struct qt_touch_extension *qt_touch_extension,
 115         uint32_t flags)
 116 {
 117 }
 118
 119
 120 /* wayland-qt-touch-extension.c BEGINS */
 121
 122 static const struct qt_touch_extension_listener touch_listener = {
 123     touch_handle_touch,
 124     touch_handle_configure,
 125 };
 126
 127 static const struct wl_interface *qt_touch_extension_types[] = {
 128     NULL,
 129     NULL,
 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 };
 143
 144 static const struct wl_message qt_touch_extension_requests[] = {
 145     { "dummy", "", qt_touch_extension_types + 0 },
 146 };
 147
 148 static const struct wl_message qt_touch_extension_events[] = {
 149     { "touch", "uuuiiiiiiuiiua", qt_touch_extension_types + 0 },
 150     { "configure", "u", qt_touch_extension_types + 0 },
 151 };
 152
 153 WL_EXPORT const struct wl_interface qt_touch_extension_interface = {
 154     "qt_touch_extension", 1,
 155     1, qt_touch_extension_requests,
 156     2, qt_touch_extension_events,
 157 };
 158
 159 /* wayland-qt-touch-extension.c ENDS */
 160
 161 /* wayland-qt-windowmanager.c BEGINS */
 162 static const struct wl_interface *qt_windowmanager_types[] = {
 163     NULL,
 164     NULL,
 165 };
 166
 167 static const struct wl_message qt_windowmanager_requests[] = {
 168     { "open_url", "us", qt_windowmanager_types + 0 },
 169 };
 170
 171 static const struct wl_message qt_windowmanager_events[] = {
 172     { "hints", "i", qt_windowmanager_types + 0 },
 173     { "quit", "", qt_windowmanager_types + 0 },
 174 };
 175
 176 WL_EXPORT const struct wl_interface qt_windowmanager_interface = {
 177     "qt_windowmanager", 1,
 178     1, qt_windowmanager_requests,
 179     2, qt_windowmanager_events,
 180 };
 181 /* wayland-qt-windowmanager.c ENDS */
 182
 183 /* wayland-qt-surface-extension.c BEGINS */
 184 extern const struct wl_interface qt_extended_surface_interface;
 185 #ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
 186 extern const struct wl_interface wl_surface_interface;
 187 #endif
 188
 189 static const struct wl_interface *qt_surface_extension_types[] = {
 190     NULL,
 191     NULL,
 192     &qt_extended_surface_interface,
 193 #ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
 194     /* FIXME: Set this dynamically to (*WAYLAND_wl_surface_interface) ?
 195      * The value comes from auto generated code and does
 196      * not appear to actually be used anywhere
 197      */
 198     NULL,
 199 #else
 200     &wl_surface_interface,
 201 #endif
 202 };
 203
 204 static const struct wl_message qt_surface_extension_requests[] = {
 205     { "get_extended_surface", "no", qt_surface_extension_types + 2 },
 206 };
 207
 208 WL_EXPORT const struct wl_interface qt_surface_extension_interface = {
 209     "qt_surface_extension", 1,
 210     1, qt_surface_extension_requests,
 211     0, NULL,
 212 };
 213
 214 static const struct wl_message qt_extended_surface_requests[] = {
 215     { "update_generic_property", "sa", qt_surface_extension_types + 0 },
 216     { "set_content_orientation", "i", qt_surface_extension_types + 0 },
 217     { "set_window_flags", "i", qt_surface_extension_types + 0 },
 218 };
 219
 220 static const struct wl_message qt_extended_surface_events[] = {
 221     { "onscreen_visibility", "i", qt_surface_extension_types + 0 },
 222     { "set_generic_property", "sa", qt_surface_extension_types + 0 },
 223     { "close", "", qt_surface_extension_types + 0 },
 224 };
 225
 226 WL_EXPORT const struct wl_interface qt_extended_surface_interface = {
 227     "qt_extended_surface", 1,
 228     3, qt_extended_surface_requests,
 229     3, qt_extended_surface_events,
 230 };
 231
 232 /* wayland-qt-surface-extension.c ENDS */
 233
 234 void
 235 Wayland_touch_create(SDL_VideoData *data, uint32_t id)
 236 {
 237     struct SDL_WaylandTouch *touch;
 238
 239     if (data->touch) {
 240         Wayland_touch_destroy(data);
 241     }
 242
 243     /* !!! FIXME: check for failure, call SDL_OutOfMemory() */
 244     data->touch = SDL_malloc(sizeof(struct SDL_WaylandTouch));
 245
 246     touch = data->touch;
 247     touch->touch_extension = wl_registry_bind(data->registry, id, &qt_touch_extension_interface, 1);
 248     qt_touch_extension_add_listener(touch->touch_extension, &touch_listener, data);
 249 }
 250
 251 void
 252 Wayland_touch_destroy(SDL_VideoData *data)
 253 {
 254     if (data->touch) {
 255         struct SDL_WaylandTouch *touch = data->touch;
 256         if (touch->touch_extension) {
 257             qt_touch_extension_destroy(touch->touch_extension);
 258         }
 259
 260         SDL_free(data->touch);
 261         data->touch = NULL;
 262     }
 263 }
 264
 265 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */