1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 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_mouse.h"
29 #include "SDL_keyboard.h"
30 #include "SDL_waylandtouch.h"
31 #include "../../events/SDL_touch_c.h"
32
33 struct SDL_WaylandTouch {
34 struct qt_touch_extension *touch_extension;
35 };
36
37
38 /**
39 * Qt TouchPointState
40 * adapted from qtbase/src/corelib/global/qnamespace.h
41 **/
42 enum QtWaylandTouchPointState {
43 QtWaylandTouchPointPressed = 0x01,
44 QtWaylandTouchPointMoved = 0x02,
45 /*
46 Never sent by the server:
47 QtWaylandTouchPointStationary = 0x04,
48 */
49 QtWaylandTouchPointReleased = 0x08,
50 };
51
52 static void
touch_handle_touch(void * data,struct qt_touch_extension * qt_touch_extension,uint32_t time,uint32_t id,uint32_t state,int32_t x,int32_t y,int32_t normalized_x,int32_t normalized_y,int32_t width,int32_t height,uint32_t pressure,int32_t velocity_x,int32_t velocity_y,uint32_t flags,struct wl_array * rawdata)53 touch_handle_touch(void *data,
54 struct qt_touch_extension *qt_touch_extension,
55 uint32_t time,
56 uint32_t id,
57 uint32_t state,
58 int32_t x,
59 int32_t y,
60 int32_t normalized_x,
61 int32_t normalized_y,
62 int32_t width,
63 int32_t height,
64 uint32_t pressure,
65 int32_t velocity_x,
66 int32_t velocity_y,
67 uint32_t flags,
68 struct wl_array *rawdata)
69 {
70 /**
71 * Event is assembled in QtWayland in TouchExtensionGlobal::postTouchEvent
72 * (src/compositor/wayland_wrapper/qwltouch.cpp)
73 **/
74
75 float FIXED_TO_FLOAT = 1. / 10000.;
76 float xf = FIXED_TO_FLOAT * x;
77 float yf = FIXED_TO_FLOAT * y;
78
79 float PRESSURE_TO_FLOAT = 1. / 255.;
80 float pressuref = PRESSURE_TO_FLOAT * pressure;
81
82 uint32_t touchState = state & 0xFFFF;
83 /*
84 Other fields that are sent by the server (qwltouch.cpp),
85 but not used at the moment can be decoded in this way:
86
87 uint32_t sentPointCount = state >> 16;
88 uint32_t touchFlags = flags & 0xFFFF;
89 uint32_t capabilities = flags >> 16;
90 */
91
92 SDL_Window* window = NULL;
93
94 SDL_TouchID deviceId = 1;
95 if (SDL_AddTouch(deviceId, SDL_TOUCH_DEVICE_DIRECT, "qt_touch_extension") < 0) {
96 SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
97 }
98
99 /* FIXME: This should be the window the given wayland surface is associated
100 * with, but how do we get the wayland surface? */
101 window = SDL_GetMouseFocus();
102 if (window == NULL) {
103 window = SDL_GetKeyboardFocus();
104 }
105
106 switch (touchState) {
107 case QtWaylandTouchPointPressed:
108 case QtWaylandTouchPointReleased:
109 SDL_SendTouch(deviceId, (SDL_FingerID)id, window,
110 (touchState == QtWaylandTouchPointPressed) ? SDL_TRUE : SDL_FALSE,
111 xf, yf, pressuref);
112 break;
113 case QtWaylandTouchPointMoved:
114 SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, window, xf, yf, pressuref);
115 break;
116 default:
117 /* Should not happen */
118 break;
119 }
120 }
121
122 static void
touch_handle_configure(void * data,struct qt_touch_extension * qt_touch_extension,uint32_t flags)123 touch_handle_configure(void *data,
124 struct qt_touch_extension *qt_touch_extension,
125 uint32_t flags)
126 {
127 }
128
129
130 /* wayland-qt-touch-extension.c BEGINS */
131
132 static const struct qt_touch_extension_listener touch_listener = {
133 touch_handle_touch,
134 touch_handle_configure,
135 };
136
137 static const struct wl_interface *qt_touch_extension_types[] = {
138 NULL,
139 NULL,
140 NULL,
141 NULL,
142 NULL,
143 NULL,
144 NULL,
145 NULL,
146 NULL,
147 NULL,
148 NULL,
149 NULL,
150 NULL,
151 NULL,
152 };
153
154 static const struct wl_message qt_touch_extension_requests[] = {
155 { "dummy", "", qt_touch_extension_types + 0 },
156 };
157
158 static const struct wl_message qt_touch_extension_events[] = {
159 { "touch", "uuuiiiiiiuiiua", qt_touch_extension_types + 0 },
160 { "configure", "u", qt_touch_extension_types + 0 },
161 };
162
163 WL_EXPORT const struct wl_interface qt_touch_extension_interface = {
164 "qt_touch_extension", 1,
165 1, qt_touch_extension_requests,
166 2, qt_touch_extension_events,
167 };
168
169 /* wayland-qt-touch-extension.c ENDS */
170
171 /* wayland-qt-windowmanager.c BEGINS */
172 static const struct wl_interface *qt_windowmanager_types[] = {
173 NULL,
174 NULL,
175 };
176
177 static const struct wl_message qt_windowmanager_requests[] = {
178 { "open_url", "us", qt_windowmanager_types + 0 },
179 };
180
181 static const struct wl_message qt_windowmanager_events[] = {
182 { "hints", "i", qt_windowmanager_types + 0 },
183 { "quit", "", qt_windowmanager_types + 0 },
184 };
185
186 WL_EXPORT const struct wl_interface qt_windowmanager_interface = {
187 "qt_windowmanager", 1,
188 1, qt_windowmanager_requests,
189 2, qt_windowmanager_events,
190 };
191 /* wayland-qt-windowmanager.c ENDS */
192
193 /* wayland-qt-surface-extension.c BEGINS */
194 #ifndef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
195 extern const struct wl_interface wl_surface_interface;
196 #endif
197
198 static const struct wl_interface *qt_surface_extension_types[] = {
199 NULL,
200 NULL,
201 &qt_extended_surface_interface,
202 #ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
203 /* FIXME: Set this dynamically to (*WAYLAND_wl_surface_interface) ?
204 * The value comes from auto generated code and does
205 * not appear to actually be used anywhere
206 */
207 NULL,
208 #else
209 &wl_surface_interface,
210 #endif
211 };
212
213 static const struct wl_message qt_surface_extension_requests[] = {
214 { "get_extended_surface", "no", qt_surface_extension_types + 2 },
215 };
216
217 WL_EXPORT const struct wl_interface qt_surface_extension_interface = {
218 "qt_surface_extension", 1,
219 1, qt_surface_extension_requests,
220 0, NULL,
221 };
222
223 static const struct wl_message qt_extended_surface_requests[] = {
224 { "update_generic_property", "sa", qt_surface_extension_types + 0 },
225 { "set_content_orientation", "i", qt_surface_extension_types + 0 },
226 { "set_window_flags", "i", qt_surface_extension_types + 0 },
227 };
228
229 static const struct wl_message qt_extended_surface_events[] = {
230 { "onscreen_visibility", "i", qt_surface_extension_types + 0 },
231 { "set_generic_property", "sa", qt_surface_extension_types + 0 },
232 { "close", "", qt_surface_extension_types + 0 },
233 };
234
235 WL_EXPORT const struct wl_interface qt_extended_surface_interface = {
236 "qt_extended_surface", 1,
237 3, qt_extended_surface_requests,
238 3, qt_extended_surface_events,
239 };
240
241 /* wayland-qt-surface-extension.c ENDS */
242
243 void
Wayland_touch_create(SDL_VideoData * data,uint32_t id)244 Wayland_touch_create(SDL_VideoData *data, uint32_t id)
245 {
246 struct SDL_WaylandTouch *touch;
247
248 if (data->touch) {
249 Wayland_touch_destroy(data);
250 }
251
252 /* !!! FIXME: check for failure, call SDL_OutOfMemory() */
253 data->touch = SDL_malloc(sizeof(struct SDL_WaylandTouch));
254
255 touch = data->touch;
256 touch->touch_extension = wl_registry_bind(data->registry, id, &qt_touch_extension_interface, 1);
257 qt_touch_extension_add_listener(touch->touch_extension, &touch_listener, data);
258 }
259
260 void
Wayland_touch_destroy(SDL_VideoData * data)261 Wayland_touch_destroy(SDL_VideoData *data)
262 {
263 if (data->touch) {
264 struct SDL_WaylandTouch *touch = data->touch;
265 if (touch->touch_extension) {
266 qt_touch_extension_destroy(touch->touch_extension);
267 }
268
269 SDL_free(data->touch);
270 data->touch = NULL;
271 }
272 }
273
274 #endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */
275