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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.io/license.html
*/
#include "gfx.h"
#include <linux/input.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
#define GMOUSE_DRIVER_VMT GMOUSEVMT_LINUX_EVENT
#include "src/ginput/ginput_driver_mouse.h"
// Include the board file
#include "gmouse_lld_linux_event_board.h"
// Private area definition
// We need to store the last reading ourselves because we only get events
// from the Linux system. When touching the touchscreen and then moving around,
// we only get one z = 1 event. However, the GINPUT module expects z = 1 to be
// true for the entire touch duration.
typedef struct privStruct {
int fd;
GMouseReading lastReading;
} privStruct;
static gBool _init(GMouse* m, unsigned driverInstance)
{
(void)driverInstance;
// Retrive the private area struct
privStruct* priv = (privStruct*)(m+1);
// Open the device
priv->fd = open(GMOUSE_LINUX_EVENT_DEVICE, O_RDONLY | O_NONBLOCK);
if (priv->fd < 0) {
fprintf(stderr, "GINPUT Mouse: Cannot open input device (%s)\n", GMOUSE_LINUX_EVENT_DEVICE);
return gFalse;
}
// Initialize
priv->lastReading.buttons = 0;
priv->lastReading.x = 0;
priv->lastReading.y = 0;
priv->lastReading.z = 0;
return gTrue;
}
static gBool _read(GMouse* m, GMouseReading* pdr)
{
int i;
int rb;
struct input_event ev[64];
privStruct* priv;
// Retrive the private area struct
priv = (privStruct*)(m+1);
// Assume not touched
pdr->buttons = 0;
pdr->z = priv->lastReading.z;
pdr->x = priv->lastReading.x;
pdr->y = priv->lastReading.y;
// Read
rb = read(priv->fd, ev, sizeof(struct input_event)*64);
// Parse
if (rb > 0) {
for (i = 0; i < (int)(rb / sizeof(struct input_event)); i++) {
if (ev[i].type == EV_KEY && ev[i].code == 330 && ev[i].value == 1) {
pdr->z = 1;
}
else if (ev[i].type == EV_KEY && ev[i].code == 330 && ev[i].value == 0) {
pdr->z = 0;
}
else if (ev[i].type == EV_ABS && ev[i].code == 0 && ev[i].value > 0) {
pdr->x = ev[i].value;
}
else if (ev[i].type == EV_ABS && ev[i].code == 1 && ev[i].value > 0) {
pdr->y = ev[i].value;
}
}
}
// Store the current reading
priv->lastReading.x = pdr->x;
priv->lastReading.y = pdr->y;
priv->lastReading.z = pdr->z;
priv->lastReading.buttons = pdr->buttons;
return gTrue;
}
const GMouseVMT const GMOUSE_DRIVER_VMT[1] = {{
{
GDRIVER_TYPE_TOUCH,
#if GMOUSE_LINUX_EVENT_FINGERMODE
GMOUSE_VFLG_DEFAULTFINGER |
#endif
#if GMOUSE_LINUX_EVENT_SELF_CALIBRATE
GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN ,
#else
GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN |GMOUSE_VFLG_CALIBRATE,
#endif
sizeof(GMouse) + sizeof(privStruct),
_gmouseInitDriver,
_gmousePostInitDriver,
_gmouseDeInitDriver
},
1, // z_max - (currently?) not supported
0, // z_min - (currently?) not supported
1, // z_touchon
0, // z_touchoff
{ // pen_jitter
0, // calibrate
0, // click
0 // move
},
{ // finger_jitter
0, // calibrate
0, // click
0 // move
},
_init, // init
0, // deinit
_read, // get
0, // calsave
0 // calload
}};
#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
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