144 lines
4.5 KiB
C
144 lines
4.5 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2024 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.
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_touch.h
|
|
*
|
|
* Include file for SDL touch event handling.
|
|
*/
|
|
|
|
#ifndef SDL_touch_h_
|
|
#define SDL_touch_h_
|
|
|
|
#include <SDL3/SDL_stdinc.h>
|
|
#include <SDL3/SDL_error.h>
|
|
#include <SDL3/SDL_video.h>
|
|
|
|
#include <SDL3/SDL_begin_code.h>
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef Uint64 SDL_TouchID;
|
|
typedef Uint64 SDL_FingerID;
|
|
|
|
typedef enum
|
|
{
|
|
SDL_TOUCH_DEVICE_INVALID = -1,
|
|
SDL_TOUCH_DEVICE_DIRECT, /* touch screen with window-relative coordinates */
|
|
SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE, /* trackpad with absolute device coordinates */
|
|
SDL_TOUCH_DEVICE_INDIRECT_RELATIVE /* trackpad with screen cursor-relative coordinates */
|
|
} SDL_TouchDeviceType;
|
|
|
|
typedef struct SDL_Finger
|
|
{
|
|
SDL_FingerID id;
|
|
float x;
|
|
float y;
|
|
float pressure;
|
|
} SDL_Finger;
|
|
|
|
/* Used as the device ID for mouse events simulated with touch input */
|
|
#define SDL_TOUCH_MOUSEID ((Uint32)-1)
|
|
|
|
/* Used as the SDL_TouchID for touch events simulated with mouse input */
|
|
#define SDL_MOUSE_TOUCHID ((Uint64)-1)
|
|
|
|
|
|
/**
|
|
* Get a list of registered touch devices.
|
|
*
|
|
* On some platforms SDL first sees the touch device if it was actually used.
|
|
* Therefore the returned list might be empty, although devices are available.
|
|
* After using all devices at least once the number will be correct.
|
|
*
|
|
* This was fixed for Android in SDL 2.0.1.
|
|
*
|
|
* \param count a pointer filled in with the number of devices returned, can
|
|
* be NULL.
|
|
* \returns a 0 terminated array of touch device IDs which should be freed
|
|
* with SDL_free(), or NULL on error; call SDL_GetError() for more
|
|
* details.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_TouchID *SDLCALL SDL_GetTouchDevices(int *count);
|
|
|
|
/**
|
|
* Get the touch device name as reported from the driver.
|
|
*
|
|
* You do not own the returned string, do not modify or free it.
|
|
*
|
|
* \param touchID the touch device instance ID.
|
|
* \returns touch device name, or NULL on error; call SDL_GetError() for more
|
|
* details.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC const char* SDLCALL SDL_GetTouchDeviceName(SDL_TouchID touchID);
|
|
|
|
/**
|
|
* Get the type of the given touch device.
|
|
*
|
|
* \param touchID the ID of a touch device
|
|
* \returns touch device type
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_TouchDeviceType SDLCALL SDL_GetTouchDeviceType(SDL_TouchID touchID);
|
|
|
|
/**
|
|
* Get the number of active fingers for a given touch device.
|
|
*
|
|
* \param touchID the ID of a touch device
|
|
* \returns the number of active fingers for a given touch device on success
|
|
* or a negative error code on failure; call SDL_GetError() for more
|
|
* information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_GetTouchFinger
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetNumTouchFingers(SDL_TouchID touchID);
|
|
|
|
/**
|
|
* Get the finger object for specified touch device ID and finger index.
|
|
*
|
|
* The returned resource is owned by SDL and should not be deallocated.
|
|
*
|
|
* \param touchID the ID of the requested touch device
|
|
* \param index the index of the requested finger
|
|
* \returns a pointer to the SDL_Finger object or NULL if no object at the
|
|
* given ID and index could be found.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_Finger * SDLCALL SDL_GetTouchFinger(SDL_TouchID touchID, int index);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_touch_h_ */
|