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Implements touch support on QTWayland. Contributed by Thomas Perl.
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/* | ||
Simple DirectMedia Layer | ||
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> | ||
This software is provided 'as-is', without any express or implied | ||
warranty. In no event will the authors be held liable for any damages | ||
arising from the use of this software. | ||
Permission is granted to anyone to use this software for any purpose, | ||
including commercial applications, and to alter it and redistribute it | ||
freely, subject to the following restrictions: | ||
1. The origin of this software must not be misrepresented; you must not | ||
claim that you wrote the original software. If you use this software | ||
in a product, an acknowledgment in the product documentation would be | ||
appreciated but is not required. | ||
2. Altered source versions must be plainly marked as such, and must not be | ||
misrepresented as being the original software. | ||
3. This notice may not be removed or altered from any source distribution. | ||
*/ | ||
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/* Contributed by Thomas Perl <thomas.perl@jollamobile.com> */ | ||
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#include "SDL_config.h" | ||
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#ifdef SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH | ||
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#include "SDL_waylandtouch.h" | ||
#include "SDL_log.h" | ||
#include "../../events/SDL_touch_c.h" | ||
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struct SDL_WaylandTouch { | ||
struct qt_touch_extension *touch_extension; | ||
}; | ||
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/** | ||
* Qt TouchPointState | ||
* adapted from qtbase/src/corelib/global/qnamespace.h | ||
**/ | ||
enum QtWaylandTouchPointState { | ||
QtWaylandTouchPointPressed = 0x01, | ||
QtWaylandTouchPointMoved = 0x02, | ||
/* | ||
Never sent by the server: | ||
QtWaylandTouchPointStationary = 0x04, | ||
*/ | ||
QtWaylandTouchPointReleased = 0x08, | ||
}; | ||
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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) | ||
{ | ||
/** | ||
* Event is assembled in QtWayland in TouchExtensionGlobal::postTouchEvent | ||
* (src/compositor/wayland_wrapper/qwltouch.cpp) | ||
**/ | ||
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float FIXED_TO_FLOAT = 1. / 10000.; | ||
float xf = FIXED_TO_FLOAT * x; | ||
float yf = FIXED_TO_FLOAT * y; | ||
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float PRESSURE_TO_FLOAT = 1. / 255.; | ||
float pressuref = PRESSURE_TO_FLOAT * pressure; | ||
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uint32_t touchState = state & 0xFFFF; | ||
/* | ||
Other fields that are sent by the server (qwltouch.cpp), | ||
but not used at the moment can be decoded in this way: | ||
uint32_t sentPointCount = state >> 16; | ||
uint32_t touchFlags = flags & 0xFFFF; | ||
uint32_t capabilities = flags >> 16; | ||
*/ | ||
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SDL_TouchID deviceId = 0; | ||
if (!SDL_GetTouch(deviceId)) { | ||
if (SDL_AddTouch(deviceId, "qt_touch_extension") < 0) { | ||
SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__); | ||
} | ||
} | ||
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switch (touchState) { | ||
case QtWaylandTouchPointPressed: | ||
case QtWaylandTouchPointReleased: | ||
SDL_SendTouch(deviceId, (SDL_FingerID)id, | ||
(touchState == QtWaylandTouchPointPressed) ? SDL_TRUE : SDL_FALSE, | ||
xf, yf, pressuref); | ||
break; | ||
case QtWaylandTouchPointMoved: | ||
SDL_SendTouchMotion(deviceId, (SDL_FingerID)id, xf, yf, pressuref); | ||
break; | ||
default: | ||
/* Should not happen */ | ||
break; | ||
} | ||
} | ||
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static void | ||
touch_handle_configure(void *data, | ||
struct qt_touch_extension *qt_touch_extension, | ||
uint32_t flags) | ||
{ | ||
} | ||
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/* wayland-qt-touch-extension.c BEGINS */ | ||
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static const struct qt_touch_extension_listener touch_listener = { | ||
touch_handle_touch, | ||
touch_handle_configure, | ||
}; | ||
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static const struct wl_interface *qt_touch_extension_types[] = { | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
NULL, | ||
}; | ||
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static const struct wl_message qt_touch_extension_requests[] = { | ||
{ "dummy", "", qt_touch_extension_types + 0 }, | ||
}; | ||
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static const struct wl_message qt_touch_extension_events[] = { | ||
{ "touch", "uuuiiiiiiuiiua", qt_touch_extension_types + 0 }, | ||
{ "configure", "u", qt_touch_extension_types + 0 }, | ||
}; | ||
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WL_EXPORT const struct wl_interface qt_touch_extension_interface = { | ||
"qt_touch_extension", 1, | ||
1, qt_touch_extension_requests, | ||
2, qt_touch_extension_events, | ||
}; | ||
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/* wayland-qt-touch-extension.c ENDS */ | ||
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/* wayland-qt-windowmanager.c BEGINS */ | ||
static const struct wl_interface *qt_windowmanager_types[] = { | ||
NULL, | ||
NULL, | ||
}; | ||
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static const struct wl_message qt_windowmanager_requests[] = { | ||
{ "open_url", "us", qt_windowmanager_types + 0 }, | ||
}; | ||
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static const struct wl_message qt_windowmanager_events[] = { | ||
{ "hints", "i", qt_windowmanager_types + 0 }, | ||
{ "quit", "", qt_windowmanager_types + 0 }, | ||
}; | ||
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WL_EXPORT const struct wl_interface qt_windowmanager_interface = { | ||
"qt_windowmanager", 1, | ||
1, qt_windowmanager_requests, | ||
2, qt_windowmanager_events, | ||
}; | ||
/* wayland-qt-windowmanager.c ENDS */ | ||
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/* wayland-qt-surface-extension.c BEGINS */ | ||
extern const struct wl_interface qt_extended_surface_interface; | ||
extern const struct wl_interface wl_surface_interface; | ||
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static const struct wl_interface *qt_surface_extension_types[] = { | ||
NULL, | ||
NULL, | ||
&qt_extended_surface_interface, | ||
&wl_surface_interface, | ||
}; | ||
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static const struct wl_message qt_surface_extension_requests[] = { | ||
{ "get_extended_surface", "no", qt_surface_extension_types + 2 }, | ||
}; | ||
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WL_EXPORT const struct wl_interface qt_surface_extension_interface = { | ||
"qt_surface_extension", 1, | ||
1, qt_surface_extension_requests, | ||
0, NULL, | ||
}; | ||
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static const struct wl_message qt_extended_surface_requests[] = { | ||
{ "update_generic_property", "sa", qt_surface_extension_types + 0 }, | ||
{ "set_content_orientation", "i", qt_surface_extension_types + 0 }, | ||
{ "set_window_flags", "i", qt_surface_extension_types + 0 }, | ||
}; | ||
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static const struct wl_message qt_extended_surface_events[] = { | ||
{ "onscreen_visibility", "i", qt_surface_extension_types + 0 }, | ||
{ "set_generic_property", "sa", qt_surface_extension_types + 0 }, | ||
{ "close", "", qt_surface_extension_types + 0 }, | ||
}; | ||
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WL_EXPORT const struct wl_interface qt_extended_surface_interface = { | ||
"qt_extended_surface", 1, | ||
3, qt_extended_surface_requests, | ||
3, qt_extended_surface_events, | ||
}; | ||
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/* wayland-qt-surface-extension.c ENDS */ | ||
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void | ||
Wayland_touch_create(SDL_VideoData *data, uint32_t id) | ||
{ | ||
if (data->touch) { | ||
Wayland_touch_destroy(data); | ||
} | ||
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data->touch = malloc(sizeof(struct SDL_WaylandTouch)); | ||
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struct SDL_WaylandTouch *touch = data->touch; | ||
touch->touch_extension = wl_registry_bind(data->registry, id, &qt_touch_extension_interface, 1); | ||
qt_touch_extension_add_listener(touch->touch_extension, &touch_listener, data); | ||
} | ||
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void | ||
Wayland_touch_destroy(SDL_VideoData *data) | ||
{ | ||
if (data->touch) { | ||
struct SDL_WaylandTouch *touch = data->touch; | ||
if (touch->touch_extension) { | ||
qt_touch_extension_destroy(touch->touch_extension); | ||
} | ||
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free(data->touch); | ||
data->touch = NULL; | ||
} | ||
} | ||
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#endif /* SDL_VIDEO_DRIVER_WAYLAND_QT_TOUCH */ |
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