1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2022 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/**
23 * \file SDL_gesture.h
24 *
25 * Include file for SDL gesture event handling.
26 */
27
28#ifndef SDL_gesture_h_
29#define SDL_gesture_h_
30
31#include "SDL_stdinc.h"
32#include "SDL_error.h"
33#include "SDL_video.h"
34
35#include "SDL_touch.h"
36
37
38#include "begin_code.h"
39/* Set up for C function definitions, even when using C++ */
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44typedef Sint64 SDL_GestureID;
45
46/* Function prototypes */
47
48/**
49 * Begin recording a gesture on a specified touch device or all touch devices.
50 *
51 * If the parameter `touchId` is -1 (i.e., all devices), this function will
52 * always return 1, regardless of whether there actually are any devices.
53 *
54 * \param touchId the touch device id, or -1 for all touch devices
55 * \returns 1 on success or 0 if the specified device could not be found.
56 *
57 * \since This function is available since SDL 2.0.0.
58 *
59 * \sa SDL_GetTouchDevice
60 */
61extern DECLSPEC int SDLCALL SDL_RecordGesture(SDL_TouchID touchId);
62
63
64/**
65 * Save all currently loaded Dollar Gesture templates.
66 *
67 * \param dst a SDL_RWops to save to
68 * \returns the number of saved templates on success or 0 on failure; call
69 * SDL_GetError() for more information.
70 *
71 * \since This function is available since SDL 2.0.0.
72 *
73 * \sa SDL_LoadDollarTemplates
74 * \sa SDL_SaveDollarTemplate
75 */
76extern DECLSPEC int SDLCALL SDL_SaveAllDollarTemplates(SDL_RWops *dst);
77
78/**
79 * Save a currently loaded Dollar Gesture template.
80 *
81 * \param gestureId a gesture id
82 * \param dst a SDL_RWops to save to
83 * \returns 1 on success or 0 on failure; call SDL_GetError() for more
84 * information.
85 *
86 * \since This function is available since SDL 2.0.0.
87 *
88 * \sa SDL_LoadDollarTemplates
89 * \sa SDL_SaveAllDollarTemplates
90 */
91extern DECLSPEC int SDLCALL SDL_SaveDollarTemplate(SDL_GestureID gestureId,SDL_RWops *dst);
92
93
94/**
95 * Load Dollar Gesture templates from a file.
96 *
97 * \param touchId a touch id
98 * \param src a SDL_RWops to load from
99 * \returns the number of loaded templates on success or a negative error code
100 * (or 0) on failure; call SDL_GetError() for more information.
101 *
102 * \since This function is available since SDL 2.0.0.
103 *
104 * \sa SDL_SaveAllDollarTemplates
105 * \sa SDL_SaveDollarTemplate
106 */
107extern DECLSPEC int SDLCALL SDL_LoadDollarTemplates(SDL_TouchID touchId, SDL_RWops *src);
108
109/* Ends C function definitions when using C++ */
110#ifdef __cplusplus
111}
112#endif
113#include "close_code.h"
114
115#endif /* SDL_gesture_h_ */
116
117/* vi: set ts=4 sw=4 expandtab: */
118

source code of include/SDL2/SDL_gesture.h