comparison: pidgin/plugins/gestures/stroke.c
pidgin/plugins/gestures/stroke.c
- changeset 39918
- 1c8e11f9274f
- parent 39916
- 6a79856cb8f5
- child 40497
- 2f45a03838e9
equal
deleted
inserted
replaced
| 39917:45dbd7582a5a | 39918:1c8e11f9274f |
|---|---|
| 20 | 20 |
| 21 | 21 |
| 22 void | 22 void |
| 23 _gstroke_init (struct gstroke_metrics *metrics) | 23 _gstroke_init (struct gstroke_metrics *metrics) |
| 24 { | 24 { |
| 25 if (metrics->pointList != NULL) { | 25 if (metrics->pointList != NULL) { |
| 26 /* FIXME: does this free the data too?*/ | 26 g_slist_free_full(metrics->pointList, g_free); |
| 27 g_slist_free (metrics->pointList); | 27 metrics->pointList = NULL; |
| 28 metrics->pointList = NULL; | 28 metrics->point_count = 0; |
| 29 metrics->point_count = 0; | 29 } |
| 30 } | |
| 31 } | 30 } |
| 32 | 31 |
| 33 /* figure out which bin the point falls in */ | 32 /* figure out which bin the point falls in */ |
| 34 static gint | 33 static gint |
| 35 _gstroke_bin (p_point point_p, gint bound_x_1, gint bound_x_2, | 34 _gstroke_bin (p_point point_p, gint bound_x_1, gint bound_x_2, |
| 195 #if 0 | 194 #if 0 |
| 196 printf ("%d:%d ", x, y); fflush (stdout); | 195 printf ("%d:%d ", x, y); fflush (stdout); |
| 197 #endif | 196 #endif |
| 198 | 197 |
| 199 if (metrics->point_count < GSTROKE_MAX_POINTS) { | 198 if (metrics->point_count < GSTROKE_MAX_POINTS) { |
| 200 new_point_p = g_malloc(sizeof (struct s_point)); | |
| 201 | |
| 202 if (metrics->pointList == NULL) { | 199 if (metrics->pointList == NULL) { |
| 203 | 200 |
| 204 /* first point in list - initialize metrics */ | 201 /* first point in list - initialize metrics */ |
| 205 metrics->min_x = 10000; | 202 metrics->min_x = 10000; |
| 206 metrics->min_y = 10000; | 203 metrics->min_y = 10000; |
| 207 metrics->max_x = -1; | 204 metrics->max_x = -1; |
| 208 metrics->max_y = -1; | 205 metrics->max_y = -1; |
| 209 | 206 |
| 207 new_point_p = g_new0(struct s_point, 1); | |
| 210 metrics->pointList = g_slist_prepend(metrics->pointList, new_point_p); | 208 metrics->pointList = g_slist_prepend(metrics->pointList, new_point_p); |
| 211 metrics->point_count = 0; | 209 metrics->point_count = 0; |
| 212 | 210 |
| 213 } else { | 211 } else { |
| 214 | 212 p_point last_point = (p_point)g_slist_last(metrics->pointList)->data; |
| 215 #define LAST_POINT ((p_point)(g_slist_last (metrics->pointList)->data)) | |
| 216 | 213 |
| 217 /* interpolate between last and current point */ | 214 /* interpolate between last and current point */ |
| 218 delx = x - LAST_POINT->x; | 215 delx = x - last_point->x; |
| 219 dely = y - LAST_POINT->y; | 216 dely = y - last_point->y; |
| 220 | 217 |
| 221 if (abs(delx) > abs(dely)) { /* step by the greatest delta direction */ | 218 if (abs(delx) > abs(dely)) { /* step by the greatest delta direction */ |
| 222 iy = LAST_POINT->y; | 219 iy = last_point->y; |
| 223 | 220 |
| 224 /* go from the last point to the current, whatever direction it may be */ | 221 /* go from the last point to the current, whatever direction it may be */ |
| 225 for (ix = LAST_POINT->x; (delx > 0) ? (ix < x) : (ix > x); ix += (delx > 0) ? 1 : -1) { | 222 for (ix = last_point->x; (delx > 0) ? (ix < x) : (ix > x); ix += (delx > 0) ? 1 : -1) { |
| 226 | 223 |
| 227 /* step the other axis by the correct increment */ | 224 /* step the other axis by the correct increment */ |
| 228 iy += fabs(((float) dely / (float) delx)) * (float) ((dely < 0) ? -1.0 : 1.0); | 225 iy += fabs(((float) dely / (float) delx)) * (float) ((dely < 0) ? -1.0 : 1.0); |
| 229 | 226 |
| 230 /* add the interpolated point */ | 227 /* add the interpolated point */ |
| 228 new_point_p = g_new0(struct s_point, 1); | |
| 231 new_point_p->x = ix; | 229 new_point_p->x = ix; |
| 232 new_point_p->y = iy; | 230 new_point_p->y = iy; |
| 233 metrics->pointList = g_slist_append (metrics->pointList, new_point_p); | 231 metrics->pointList = g_slist_append (metrics->pointList, new_point_p); |
| 234 | 232 |
| 235 /* update metrics */ | 233 /* update metrics */ |
| 237 if (((gint) ix) > metrics->max_x) metrics->max_x = (gint) ix; | 235 if (((gint) ix) > metrics->max_x) metrics->max_x = (gint) ix; |
| 238 if (((gint) iy) < metrics->min_y) metrics->min_y = (gint) iy; | 236 if (((gint) iy) < metrics->min_y) metrics->min_y = (gint) iy; |
| 239 if (((gint) iy) > metrics->max_y) metrics->max_y = (gint) iy; | 237 if (((gint) iy) > metrics->max_y) metrics->max_y = (gint) iy; |
| 240 metrics->point_count++; | 238 metrics->point_count++; |
| 241 | 239 |
| 242 new_point_p = g_malloc(sizeof(struct s_point)); | |
| 243 } | 240 } |
| 244 } else { /* same thing, but for dely larger than delx case... */ | 241 } else { /* same thing, but for dely larger than delx case... */ |
| 245 ix = LAST_POINT->x; | 242 p_point last_point = (p_point)g_slist_last(metrics->pointList)->data; |
| 243 | |
| 244 ix = last_point->x; | |
| 246 | 245 |
| 247 /* go from the last point to the current, whatever direction it may be | 246 /* go from the last point to the current, whatever direction it may be |
| 248 */ | 247 */ |
| 249 for (iy = LAST_POINT->y; (dely > 0) ? (iy < y) : (iy > y); iy += (dely > 0) ? 1 : -1) { | 248 for (iy = last_point->y; (dely > 0) ? (iy < y) : (iy > y); iy += (dely > 0) ? 1 : -1) { |
| 250 | 249 |
| 251 /* step the other axis by the correct increment */ | 250 /* step the other axis by the correct increment */ |
| 252 ix += fabs(((float) delx / (float) dely)) * (float) ((delx < 0) ? -1.0 : 1.0); | 251 ix += fabs(((float) delx / (float) dely)) * (float) ((delx < 0) ? -1.0 : 1.0); |
| 253 | 252 |
| 254 /* add the interpolated point */ | 253 /* add the interpolated point */ |
| 254 new_point_p = g_new0(struct s_point, 1); | |
| 255 new_point_p->y = iy; | 255 new_point_p->y = iy; |
| 256 new_point_p->x = ix; | 256 new_point_p->x = ix; |
| 257 metrics->pointList = g_slist_append(metrics->pointList, new_point_p); | 257 metrics->pointList = g_slist_append(metrics->pointList, new_point_p); |
| 258 | 258 |
| 259 /* update metrics */ | 259 /* update metrics */ |
| 260 if (((gint) ix) < metrics->min_x) metrics->min_x = (gint) ix; | 260 if (((gint) ix) < metrics->min_x) metrics->min_x = (gint) ix; |
| 261 if (((gint) ix) > metrics->max_x) metrics->max_x = (gint) ix; | 261 if (((gint) ix) > metrics->max_x) metrics->max_x = (gint) ix; |
| 262 if (((gint) iy) < metrics->min_y) metrics->min_y = (gint) iy; | 262 if (((gint) iy) < metrics->min_y) metrics->min_y = (gint) iy; |
| 263 if (((gint) iy) > metrics->max_y) metrics->max_y = (gint) iy; | 263 if (((gint) iy) > metrics->max_y) metrics->max_y = (gint) iy; |
| 264 metrics->point_count++; | 264 metrics->point_count++; |
| 265 | |
| 266 new_point_p = g_malloc(sizeof(struct s_point)); | |
| 267 } | 265 } |
| 268 } | 266 } |
| 269 | 267 |
| 270 /* add the sampled point */ | 268 /* add the sampled point */ |
| 269 new_point_p = g_new0(struct s_point, 1); | |
| 271 metrics->pointList = g_slist_append(metrics->pointList, new_point_p); | 270 metrics->pointList = g_slist_append(metrics->pointList, new_point_p); |
| 272 } | 271 } |
| 273 | 272 |
| 274 /* record the sampled point values */ | 273 /* record the sampled point values */ |
| 275 new_point_p->x = x; | 274 new_point_p->x = x; |
