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Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h new file mode 100644 index 0000000..09582ce --- /dev/null +++ b/include/common.h @@ -0,0 +1,128 @@ +/*************************************************************************** + * + * Multitouch X driver + * Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se> + * + * 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + **************************************************************************/ + +#ifndef COMMON_H +#define COMMON_H + +#include "xorg-server.h" +#include <xf86.h> +#include <xf86_OSproc.h> +#include <xf86Xinput.h> +#include <linux/input.h> +#include <errno.h> + +/* includes available in 2.6.30-rc5 */ + +#ifndef BTN_TOOL_QUADTAP +#define BTN_TOOL_QUADTAP 0x14f /* Four fingers on trackpad */ +#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */ +#define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */ +#define ABS_MT_WIDTH_MAJOR 0x32 /* Major axis of approaching ellipse */ +#define ABS_MT_WIDTH_MINOR 0x33 /* Minor axis (omit if circular) */ +#define ABS_MT_ORIENTATION 0x34 /* Ellipse orientation */ +#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */ +#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */ +#define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device */ +#define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */ +#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */ +#define SYN_MT_REPORT 2 +#define MT_TOOL_FINGER 0 +#define MT_TOOL_PEN 1 +#endif + +/* includes available in 2.6.33 */ +#ifndef ABS_MT_PRESSURE +#define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */ +#endif + +/* includes available in 2.6.36 */ +#ifndef ABS_MT_SLOT +#define ABS_MT_SLOT 0x2f /* MT slot being modified */ +#define MT_ABS_SIZE 11 /* Size of MT_SLOT_ABS_EVENTS */ +#define MT_SLOT_ABS_EVENTS { \ + ABS_MT_TOUCH_MAJOR, \ + ABS_MT_TOUCH_MINOR, \ + ABS_MT_WIDTH_MAJOR, \ + ABS_MT_WIDTH_MINOR, \ + ABS_MT_ORIENTATION, \ + ABS_MT_POSITION_X, \ + ABS_MT_POSITION_Y, \ + ABS_MT_TOOL_TYPE, \ + ABS_MT_BLOB_ID, \ + ABS_MT_TRACKING_ID, \ + ABS_MT_PRESSURE, \ +} +#endif + +#define DIM_FINGER 32 +#define DIM2_FINGER (DIM_FINGER * DIM_FINGER) + +/* event buffer size (must be a power of two) */ +#define DIM_EVENTS 64 + +/* year-proof millisecond event time */ +typedef __u64 mstime_t; + +/* all bit masks have this type */ +typedef unsigned int bitmask_t; + +#define BITMASK(x) (1U << (x)) +#define BITONES(x) (BITMASK(x) - 1U) +#define GETBIT(m, x) (((m) >> (x)) & 1U) +#define SETBIT(m, x) (m |= BITMASK(x)) +#define CLEARBIT(m, x) (m &= ~BITMASK(x)) +#define MODBIT(m, x, b) ((b) ? SETBIT(m, x) : CLEARBIT(m, x)) + +static inline int maxval(int x, int y) { return x > y ? x : y; } +static inline int minval(int x, int y) { return x < y ? x : y; } + +static inline int clamp15(int x) +{ + return x < -32767 ? -32767 : x > 32767 ? 32767 : x; +} + +/* absolute scale is assumed to fit in 15 bits */ +static inline int dist2(int dx, int dy) +{ + dx = clamp15(dx); + dy = clamp15(dy); + return dx * dx + dy * dy; +} + +/* Count number of bits (Sean Eron Andersson's Bit Hacks) */ +static inline int bitcount(unsigned v) +{ + v -= ((v>>1) & 0x55555555); + v = (v&0x33333333) + ((v>>2) & 0x33333333); + return (((v + (v>>4)) & 0xF0F0F0F) * 0x1010101) >> 24; +} + +/* Return index of first bit [0-31], -1 on zero */ +#define firstbit(v) (__builtin_ffs(v) - 1) + +/* boost-style foreach bit */ +#define foreach_bit(i, m) \ + for (i = firstbit(m); i >= 0; i = firstbit((m) & (~0U << i + 1))) + +/* robust system ioctl calls */ +#define SYSCALL(call) while (((call) == -1) && (errno == EINTR)) + +#endif |