SDL  2.0
SDL_waylandtouch.c
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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,
57  int32_t x,
58  int32_t y,
59  int32_t normalized_x,
60  int32_t normalized_y,
61  int32_t width,
63  uint32_t pressure,
64  int32_t velocity_x,
65  int32_t velocity_y,
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
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 */
EGLSurface EGLnsecsANDROID time
Definition: eglext.h:518
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
signed int int32_t
Sint64 SDL_FingerID
Definition: SDL_touch.h:42
struct xkb_state * state
static void * wl_registry_bind(struct wl_registry *wl_registry, uint32_t name, const struct wl_interface *interface, uint32_t version)
int SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid, SDL_bool down, float x, float y, float pressure)
Definition: SDL_touch.c:222
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
GLint GLint GLsizei width
Definition: SDL_opengl.h:1572
int SDL_SendTouchMotion(SDL_TouchID id, SDL_FingerID fingerid, float x, float y, float pressure)
Definition: SDL_touch.c:284
const struct wl_interface wl_surface_interface
#define SDL_Log
#define SDL_free
Sint64 SDL_TouchID
Definition: SDL_touch.h:41
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
int SDL_AddTouch(SDL_TouchID touchID, const char *name)
Definition: SDL_touch.c:136
#define NULL
Definition: begin_code.h:164
unsigned int uint32_t
GLbitfield flags
GLint GLint GLsizei GLsizei height
Definition: SDL_opengl.h:1572
struct wl_registry * registry
#define SDL_malloc