1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Maurus Cuelenaere
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "button.h"
#include "button-target.h"
#include "touchscreen.h"
#include "string.h"
#include "logf.h"
#include "lcd.h"
/* Size of the 'dead zone' around each 3x3 button */
#define BUTTON_MARGIN_X (int)(LCD_WIDTH * 0.03)
#define BUTTON_MARGIN_Y (int)(LCD_HEIGHT * 0.03)
static bool touch_enabled = true;
static enum touchscreen_mode current_mode = TOUCHSCREEN_POINT;
static const int touchscreen_buttons[3][3] =
{
{BUTTON_TOPLEFT, BUTTON_TOPMIDDLE, BUTTON_TOPRIGHT},
{BUTTON_MIDLEFT, BUTTON_CENTER, BUTTON_MIDRIGHT},
{BUTTON_BOTTOMLEFT, BUTTON_BOTTOMMIDDLE, BUTTON_BOTTOMRIGHT}
};
#ifndef DEFAULT_TOUCHSCREEN_CALIBRATION
#define DEFAULT_TOUCHSCREEN_CALIBRATION { .A=1, .B=0, .C=0, \
.D=0, .E=1, .F=0, \
.divider=1 }
#endif
struct touchscreen_parameter calibration_parameters
= DEFAULT_TOUCHSCREEN_CALIBRATION;
const struct touchscreen_parameter default_calibration_parameters
= DEFAULT_TOUCHSCREEN_CALIBRATION;
void touchscreen_disable_mapping(void)
{
#define C(x) calibration_parameters.x
C(A) = C(E) = 1;
C(B) = C(C) = C(D) = C(F) = 0;
C(divider) = 1;
#undef C
}
void touchscreen_reset_mapping(void)
{
memcpy(&calibration_parameters, &default_calibration_parameters,
sizeof(struct touchscreen_parameter));
}
int touchscreen_calibrate(struct touchscreen_calibration *cal)
{
#define C(x) calibration_parameters.x /* Calibration */
#define S(i,j) cal->i[j][0] /* Screen */
#define D(i,j) cal->i[j][1] /* Display */
long divider = (S(x,0) - S(x,2)) * (S(y,1) - S(y,2)) -
(S(x,1) - S(x,2)) * (S(y,0) - S(y,2));
if(divider == 0)
return -1;
else
C(divider) = divider;
C(A) = (D(x,0) - D(x,2)) * (S(y,1) - S(y,2)) -
(D(x,1) - D(x,2)) * (S(y,0) - S(y,2));
C(B) = (S(x,0) - S(x,2)) * (D(x,1) - D(x,2)) -
(D(x,0) - D(x,2)) * (S(x,1) - S(x,2));
C(C) = S(y,0) * (S(x,2) * D(x,1) - S(x,1) * D(x,2)) +
S(y,1) * (S(x,0) * D(x,2) - S(x,2) * D(x,0)) +
S(y,2) * (S(x,1) * D(x,0) - S(x,0) * D(x,1));
C(D) = (D(y,0) - D(y,2)) * (S(y,1) - S(y,2)) -
(D(y,1) - D(y,2)) * (S(y,0) - S(y,2));
C(E) = (S(x,0) - S(x,2)) * (D(y,1) - D(y,2)) -
(D(y,0) - D(y,2)) * (S(x,1) - S(x,2));
C(F) = S(y,0) * (S(x,2) * D(y,1) - S(x,1) * D(y,2)) +
S(y,1) * (S(x,0) * D(y,2) - S(x,2) * D(y,0)) +
S(y,2) * (S(x,1) * D(y,0) - S(x,0) * D(y,1));
logf("A: %lX B: %lX C: %lX", C(A), C(B), C(C));
logf("D: %lX E: %lX F: %lX", C(D), C(E), C(F));
logf("divider: %lX", C(divider));
return 0;
#undef C
#undef S
#undef D
}
static void map_pixels(int *x, int *y)
{
#define C(x) calibration_parameters.x
int _x = *x, _y = *y;
*x = (C(A) * _x + C(B) * _y + C(C)) / C(divider);
*y = (C(D) * _x + C(E) * _y + C(F)) / C(divider);
#undef C
}
/* TODO: add jitter (and others) filter */
int touchscreen_to_pixels(int x, int y, int *data)
{
if(!touch_enabled)
return 0;
x &= 0xFFFF;
y &= 0xFFFF;
map_pixels(&x, &y);
if (current_mode == TOUCHSCREEN_BUTTON)
{
int column = 0, row = 0;
if (x < LCD_WIDTH/3 - BUTTON_MARGIN_X)
column = 0;
else if (x > LCD_WIDTH/3 + BUTTON_MARGIN_X &&
x < 2*LCD_WIDTH/3 - BUTTON_MARGIN_X)
column = 1;
else if (x > 2*LCD_WIDTH/3 + BUTTON_MARGIN_X)
column = 2;
else
return BUTTON_NONE;
if (y < LCD_HEIGHT/3 - BUTTON_MARGIN_Y)
row = 0;
else if (y > LCD_HEIGHT/3 + BUTTON_MARGIN_Y &&
y < 2*LCD_HEIGHT/3 - BUTTON_MARGIN_Y)
row = 1;
else if (y > 2*LCD_HEIGHT/3 + BUTTON_MARGIN_Y)
row = 2;
else
return BUTTON_NONE;
return touchscreen_buttons[row][column];
}
else
{
*data = (x << 16 | y);
return BUTTON_TOUCHSCREEN;
}
}
void touchscreen_set_mode(enum touchscreen_mode mode)
{
current_mode = mode;
}
enum touchscreen_mode touchscreen_get_mode(void)
{
return current_mode;
}
#ifndef HAS_BUTTON_HOLD
void touchscreen_enable(bool en)
{
if(en != touch_enabled)
{
touch_enabled = en;
touchscreen_enable_device(en);
}
}
bool touchscreen_is_enabled(void)
{
return touch_enabled;
}
#endif
#if ((CONFIG_PLATFORM & PLATFORM_ANDROID) == 0) || defined(DX50) || defined(DX90)
/* android has an API for this */
#define TOUCH_SLOP 16u
#define REFERENCE_DPI 160
int touchscreen_get_scroll_threshold(void)
{
#ifdef LCD_DPI
const int dpi = LCD_DPI;
#else
const int dpi = lcd_get_dpi();
#endif
/* Inspired by Android calculation
*
* float density = real dpi / reference dpi (=160)
* int threshold = (int) (density * TOUCH_SLOP + 0.5f);(original calculation)
*
* + 0.5f is for rounding, we use fixed point math to achieve that
*/
int result = dpi * (TOUCH_SLOP<<1) / REFERENCE_DPI;
result += result & 1; /* round up if needed */
return result>>1;
}
#endif
|
