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#include "state.h"
#include <stdlib.h>
/******************************************************/
void init_state(struct State *s)
{
memset(s, 0, sizeof(struct State));
}
/******************************************************/
static int fincmp(const void* a,const void* b)
{
return ((struct FingerState *)a)->id - ((struct FingerState *)b)->id;
}
inline float dist2(const struct FingerData* a,const struct FingerData* b)
{
float dx = a->position_x - b->position_x;
float dy = a->position_y - b->position_y;
return dx * dx + dy * dy;
}
static void set_finger(struct FingerState* fs,
const struct FingerData* hw, int id,
const struct Capabilities* caps)
{
fs->hw = *hw;
fs->id = id;
if (!caps->has_touch_minor)
fs->hw.touch_minor = hw->touch_major;
if (!caps->has_width_minor)
fs->hw.width_minor = hw->width_major;
}
inline bool good_finger(const struct FingerState* fs)
{
return fs->hw.touch_major > 0 && fs->hw.width_major > 0 &&
fs->hw.touch_minor > 0 && fs->hw.width_minor > 0;
}
/******************************************************/
void modify_state(struct State *s,
const struct HWData* hw,
const struct Capabilities* caps)
{
float A[DIM2_FINGER], *row;
int id[DIM_FINGER], index[DIM_FINGER], i, j;
struct FingerState *fs = s->finger;
for (j = 0; j < s->nfinger; j++) {
id[j] = s->finger[j].id;
row = A + hw->nfinger * j;
for (i = 0; i < hw->nfinger; i++)
row[i] = dist2(&hw->finger[i], &s->finger[j].hw);
}
match_fingers(index, A, hw->nfinger, s->nfinger);
/* update matched fingers and create new ones */
for (i = 0; i < hw->nfinger; i++) {
j = index[i];
if (j >= 0)
set_finger(fs, hw->finger + i, id[j], caps);
else
set_finger(fs, hw->finger + i, ++s->lastid, caps);
if (good_finger(fs))
fs++;
}
s->nfinger = fs - s->finger;
/* sort fingers in touching order */
qsort(s->finger, s->nfinger, sizeof(struct FingerState), fincmp);
/* copy buttons */
for (i = 0; i < DIM_BUTTON; i++)
s->button[i] = hw->button[i];
}
/******************************************************/
const struct FingerState *find_finger(const struct State *s, int id)
{
int i;
for (i = 0; i < s->nfinger; i++)
if (s->finger[i].id == id)
return s->finger + i;
return NULL;
}
/******************************************************/
void output_state(const struct State *s)
{
int i;
xf86Msg(X_INFO, "buttons: %d%d%d\n",
s->button[0], s->button[1], s->button[2]);
xf86Msg(X_INFO, "fingers: %d\n",
s->nfinger);
for (i = 0; i < s->nfinger; i++) {
xf86Msg(X_INFO,
" %+02d %+05d:%+05d +%05d:%+05d %+06d %+05d:%+05d\n",
s->finger[i].id,
s->finger[i].hw.touch_major,
s->finger[i].hw.touch_minor,
s->finger[i].hw.width_major,
s->finger[i].hw.width_minor,
s->finger[i].hw.orientation,
s->finger[i].hw.position_x,
s->finger[i].hw.position_y);
}
}
/******************************************************/
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