Mercurial > MadButterfly
annotate src/redraw_man.c @ 16:e17e12b112c4
A simple animation using rdman_redraw_changed().
| author | Thinker K.F. Li <thinker@branda.to> |
|---|---|
| date | Fri, 01 Aug 2008 18:20:28 +0800 |
| parents | c2ce186a5c37 |
| children | 41f0907b27ac |
| rev | line source |
|---|---|
| 12 | 1 #include <stdio.h> |
| 2 #include <stdlib.h> | |
| 3 #include <string.h> | |
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4 #include <cairo.h> |
| 12 | 5 #include "mb_types.h" |
| 6 #include "shapes.h" | |
| 7 #include "tools.h" | |
| 8 #include "redraw_man.h" | |
| 9 | |
| 10 #define OK 0 | |
| 11 #define ERR -1 | |
| 12 | |
| 13 | 13 #define OFFSET(type, field) ((void *)&((type *)NULL)->field - (void *)NULL) |
| 14 #define SWAP(a, b, t) do { t c; c = a; a = b; b = c; } while(0) | |
| 15 | |
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16 /*! \brief Sort a list of element by a unsigned integer. |
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17 * |
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18 * The result is in ascend order. The unsigned integers is |
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19 * at offset specified by 'off' from start address of elemnts. |
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20 */ |
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21 static void _insert_sort(void **elms, int num, int off) { |
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22 int i, j; |
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23 unsigned int val; |
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24 |
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25 for(i = 1; i < num; i++) { |
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26 val = *(unsigned int *)(elms[i] + off); |
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27 for(j = i; j > 0; j--) { |
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28 if(*(unsigned int *)(elms[j - 1] + off) <= val) |
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29 break; |
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30 elms[j] = elms[j - 1]; |
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31 } |
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32 elms[j] = elms[i]; |
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33 } |
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34 } |
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35 |
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36 static int extend_memblk(void **buf, int o_size, int n_size) { |
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37 void *new_buf; |
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38 |
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39 new_buf = realloc(*buf, n_size); |
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40 if(new_buf == NULL) |
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41 return ERR; |
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42 |
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43 if(new_buf != *buf) |
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44 *buf = new_buf; |
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45 |
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46 return OK; |
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47 } |
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48 |
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49 static int add_dirty_geo(redraw_man_t *rdman, geo_t *geo) { |
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50 int max_dirty_geos; |
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51 int r; |
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52 |
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53 if(rdman->n_dirty_geos >= rdman->max_dirty_geos) { |
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54 max_dirty_geos = rdman->n_geos; |
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55 r = extend_memblk((void **)&rdman->dirty_geos, |
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56 sizeof(geo_t *) * rdman->n_dirty_geos, |
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57 sizeof(geo_t *) * max_dirty_geos); |
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58 if(r != OK) |
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59 return ERR; |
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60 rdman->max_dirty_geos = max_dirty_geos; |
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61 } |
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62 |
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63 rdman->dirty_geos[rdman->n_dirty_geos++] = geo; |
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64 return OK; |
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65 } |
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66 |
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67 static int add_dirty_area(redraw_man_t *rdman, area_t *area) { |
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68 int max_dirty_areas; |
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69 int r; |
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70 |
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71 if(rdman->n_dirty_areas >= rdman->max_dirty_areas) { |
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72 /* every geo object and coord object can contribute 2 areas. */ |
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73 max_dirty_areas = (rdman->n_geos + rdman->n_coords) * 2; |
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74 r = extend_memblk((void **)&rdman->dirty_areas, |
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75 sizeof(area_t *) * rdman->n_dirty_areas, |
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76 sizeof(area_t *) * max_dirty_areas); |
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77 if(r != OK) |
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78 return ERR; |
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79 rdman->max_dirty_areas = max_dirty_areas; |
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80 } |
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81 |
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82 rdman->dirty_areas[rdman->n_dirty_areas++] = area; |
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83 return OK; |
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84 } |
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85 |
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86 int redraw_man_init(redraw_man_t *rdman, cairo_t *cr) { |
| 12 | 87 extern void redraw_man_destroy(redraw_man_t *rdman); |
| 88 | |
| 89 memset(rdman, 0, sizeof(redraw_man_t)); | |
| 90 | |
| 91 rdman->geo_pool = elmpool_new(sizeof(geo_t), 128); | |
| 92 if(rdman->geo_pool == NULL) | |
| 93 return ERR; | |
| 94 | |
| 95 rdman->coord_pool = elmpool_new(sizeof(coord_t), 16); | |
| 96 if(rdman->coord_pool == NULL) { | |
| 97 elmpool_free(rdman->geo_pool); | |
| 98 return ERR; | |
| 99 } | |
| 100 | |
| 101 rdman->root_coord = elmpool_elm_alloc(rdman->coord_pool); | |
| 102 if(rdman->root_coord == NULL) | |
| 103 redraw_man_destroy(rdman); | |
| 13 | 104 rdman->n_coords = 1; |
| 12 | 105 coord_init(rdman->root_coord, NULL); |
| 106 | |
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107 rdman->cr = cr; |
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108 |
| 12 | 109 return OK; |
| 110 } | |
| 111 | |
| 112 void redraw_man_destroy(redraw_man_t *rdman) { | |
| 113 elmpool_free(rdman->coord_pool); | |
| 114 elmpool_free(rdman->geo_pool); | |
| 13 | 115 if(rdman->dirty_coords) |
| 116 free(rdman->dirty_coords); | |
| 14 | 117 if(rdman->dirty_geos) |
| 118 free(rdman->dirty_geos); | |
| 12 | 119 } |
| 120 | |
| 121 | |
| 122 #define ASSERT(x) | |
| 123 /* | |
| 124 * Change transformation matrix | |
| 125 * - update aggregated transformation matrix | |
| 126 * - of coord_t object been changed. | |
| 127 * - of children coord_t objects. | |
| 128 * - redraw members of coord_t objects. | |
| 129 * - redraw shape objects they are overlaid with members. | |
| 130 * - find out overlaid shape objects. | |
| 131 * - geo_t of a coord_t object | |
| 132 * - can make finding more efficiency. | |
| 133 * - fill overlay geo_t objects of members. | |
| 134 * | |
| 135 * Change a shape object | |
| 136 * - redraw changed object. | |
| 137 * - redraw shape objects they are overlaid with changed object. | |
| 138 * - find out overlaid shape objects. | |
| 139 * | |
| 140 * That coord and geo of shape objects are setted by user code | |
| 141 * give user code a chance to collect coord and geo objects together | |
| 142 * and gain interest of higher cache hit rate. | |
| 143 */ | |
| 144 | |
| 145 /*! \brief Find out all affected shape objects. | |
| 146 * | |
| 147 * Find out all shape objects that are overalid with geo_t of | |
| 148 * a geometry changed object. | |
| 149 * | |
| 150 * Linear scan geo_t objects of all shape objects in all_shapes | |
| 151 * list of a redraw_man_t object. | |
| 152 */ | |
| 153 int rdman_find_overlaid_shapes(redraw_man_t *rdman, geo_t *geo, | |
| 154 geo_t ***overlays) { | |
| 155 int n_geos; | |
| 156 geo_t **geos; | |
| 157 geo_t *geo_cur; | |
| 158 int n_overlays; | |
| 159 geo_t **_overlays; | |
| 160 int i; | |
| 161 | |
| 162 n_geos = rdman->n_geos; | |
| 163 | |
| 164 geos = (geo_t **)malloc(sizeof(geo_t *) * n_geos); | |
| 165 if(geos == NULL) | |
| 166 return -1; | |
| 167 | |
| 168 _overlays = (geo_t **)malloc(sizeof(geo_t *) * n_geos); | |
| 169 if(geos == NULL) { | |
| 170 free(geos); | |
| 171 return -1; | |
| 172 } | |
| 173 | |
| 174 geo_cur = STAILQ_HEAD(rdman->all_geos); | |
| 175 for(i = 0; i < n_geos; i++) { | |
| 176 geos[i] = geo_cur; | |
| 177 geo_cur = STAILQ_NEXT(geo_t, next, geo_cur); | |
| 178 } | |
| 179 geo_mark_overlay(geo, n_geos, geos, &n_overlays, _overlays); | |
| 180 | |
| 181 free(geos); | |
| 182 *overlays = _overlays; | |
| 183 | |
| 184 return n_overlays; | |
| 185 } | |
| 186 | |
| 187 int rdman_add_shape(redraw_man_t *rdman, shape_t *shape, coord_t *coord) { | |
| 188 geo_t *geo; | |
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189 #ifdef GEO_ORDER |
| 13 | 190 geo_t *visit; |
| 191 unsigned int next_order; | |
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192 #endif |
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193 int r; |
| 12 | 194 |
| 195 geo = elmpool_elm_alloc(rdman->geo_pool); | |
| 196 if(geo == NULL) | |
| 197 return ERR; | |
| 198 sh_attach_geo(shape, geo); | |
| 199 STAILQ_INS_TAIL(rdman->all_geos, geo_t, next, geo); | |
| 200 rdman->n_geos++; | |
| 13 | 201 |
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202 #ifdef GEO_ORDER |
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203 /* TODO: remove order number. */ |
| 13 | 204 geo->order = ++rdman->next_geo_order; |
| 205 if(geo->order == 0) { | |
| 206 next_order = 0; | |
| 207 for(visit = STAILQ_HEAD(rdman->all_geos); | |
| 208 visit != NULL; | |
| 209 visit = STAILQ_NEXT(geo_t, next, visit)) | |
| 210 visit->order = ++next_order; | |
| 211 rdman->next_geo_order = next_order; | |
| 212 } | |
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213 #endif |
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214 |
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215 /* New one should be dirty to recompute it when drawing. */ |
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216 geo->flags |= GEF_DIRTY; |
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217 r = add_dirty_geo(rdman, geo); |
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218 if(r != OK) |
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219 return ERR; |
| 13 | 220 |
| 12 | 221 sh_attach_coord(shape, coord); |
| 222 | |
| 223 return OK; | |
| 224 } | |
| 225 | |
| 226 int rdman_remove_shape(redraw_man_t *rdman, shape_t *shape) { | |
| 227 STAILQ_REMOVE(rdman->all_geos, geo_t, next, shape->geo); | |
| 228 elmpool_elm_free(rdman->geo_pool, shape->geo); | |
| 229 sh_detach_geo(shape); | |
| 230 rdman->n_geos--; | |
| 231 sh_detach_coord(shape); | |
| 232 return OK; | |
| 233 } | |
| 234 | |
| 235 coord_t *rdman_coord_new(redraw_man_t *rdman, coord_t *parent) { | |
| 13 | 236 coord_t *coord, *root_coord; |
| 237 coord_t *visit; | |
| 12 | 238 |
| 239 coord = elmpool_elm_alloc(rdman->coord_pool); | |
| 240 if(coord == NULL) | |
| 241 return NULL; | |
| 242 | |
| 243 coord_init(coord, parent); | |
| 13 | 244 rdman->n_coords++; |
| 245 | |
| 246 coord->order = ++rdman->next_coord_order; | |
| 247 if(coord->order == 0) { | |
| 248 rdman->next_coord_order = 0; | |
| 249 root_coord = visit = rdman->root_coord; | |
| 250 /* skip root coord. */ | |
| 251 visit = preorder_coord_subtree(root_coord, visit); | |
| 252 while(visit) { | |
| 253 visit->order = ++rdman->next_coord_order; | |
| 254 visit = preorder_coord_subtree(root_coord, visit); | |
| 255 } | |
| 256 } | |
| 12 | 257 |
| 258 return coord; | |
| 259 } | |
| 260 | |
| 261 /*! \brief Free a coord of a redraw_man_t object. | |
| 262 * | |
| 263 * \param coord is a coord_t without children and members. | |
| 264 * \return 0 for successful, -1 for error. | |
| 265 */ | |
| 266 int rdman_coord_free(redraw_man_t *rdman, coord_t *coord) { | |
| 267 coord_t *parent; | |
| 268 | |
| 269 parent = coord->parent; | |
| 270 if(parent == NULL) | |
| 271 return ERR; | |
| 272 | |
| 273 if(STAILQ_HEAD(coord->members) != NULL) | |
| 274 return ERR; | |
| 275 | |
| 276 if(STAILQ_HEAD(coord->children) != NULL) | |
| 277 return ERR; | |
| 278 | |
| 279 STAILQ_REMOVE(parent->children, coord_t, sibling, coord); | |
| 280 elmpool_elm_free(rdman->coord_pool, coord); | |
| 13 | 281 rdman->n_coords--; |
| 282 | |
| 283 return OK; | |
| 284 } | |
| 285 | |
| 286 /*! \brief Mark a coord is changed. | |
| 287 * | |
| 288 * A changed coord_t object is marked as dirty and put | |
| 289 * into dirty_coords list. | |
| 290 */ | |
| 291 int rdman_coord_changed(redraw_man_t *rdman, coord_t *coord) { | |
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292 coord_t *child; |
| 13 | 293 int max_dirty_coords; |
| 294 int r; | |
| 295 | |
| 296 if(coord->flags & COF_DIRTY) | |
| 297 return OK; | |
| 298 | |
| 299 if(rdman->n_dirty_coords >= rdman->max_dirty_coords) { | |
| 300 /* Max of dirty_coords is not big enough. */ | |
| 301 max_dirty_coords = rdman->max_dirty_coords + 16; | |
| 302 | |
| 303 r = extend_memblk((void **)&rdman->dirty_coords, | |
| 304 sizeof(coord_t *) * rdman->n_dirty_coords, | |
| 305 sizeof(coord_t *) * max_dirty_coords); | |
| 306 rdman->max_dirty_coords = max_dirty_coords; | |
| 307 } | |
| 308 | |
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309 /* Make the coord and child coords dirty. */ |
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310 for(child = coord; |
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311 child != NULL; |
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312 child = preorder_coord_subtree(coord, child)) { |
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313 rdman->dirty_coords[rdman->n_dirty_coords++] = coord; |
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314 coord->flags |= COF_DIRTY; |
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315 } |
| 13 | 316 |
| 317 return OK; | |
| 318 } | |
| 319 | |
| 320 /*! \brief Mark a shape is changed. | |
| 321 * | |
| 322 * The geo_t object of a changed shape is mark as dirty and | |
| 14 | 323 * put into dirty_geos list. |
| 13 | 324 */ |
| 325 int rdman_shape_changed(redraw_man_t *rdman, shape_t *shape) { | |
| 326 geo_t *geo; | |
| 327 int r; | |
| 328 | |
| 329 geo = shape->geo; | |
| 330 | |
| 331 if(geo->flags & GEF_DIRTY) | |
| 332 return OK; | |
| 333 | |
| 334 r = add_dirty_geo(rdman, geo); | |
| 335 if(r == ERR) | |
| 336 return ERR; | |
| 337 geo->flags |= GEF_DIRTY; | |
| 12 | 338 |
| 339 return OK; | |
| 340 } | |
| 341 | |
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342 static void clean_shape(shape_t *shape) { |
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343 switch(shape->sh_type) { |
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344 case SHT_PATH: |
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345 sh_path_transform(shape); |
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346 break; |
| 13 | 347 } |
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348 shape->geo->flags &= ~GEF_DIRTY; |
| 13 | 349 } |
| 350 | |
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351 static void area_to_positions(area_t *area, co_aix (*poses)[2]) { |
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352 poses[0][0] = area->x; |
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353 poses[0][1] = area->y; |
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354 poses[1][0] = area->x + area->w; |
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355 poses[1][1] = area->y + area->h;; |
| 14 | 356 } |
| 357 | |
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358 static int clean_coord(coord_t *coord) { |
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359 shape_t *shape; |
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360 geo_t *geo; |
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361 co_aix (*poses)[2]; |
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362 int cnt, pos_cnt; |
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363 int i; |
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364 |
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365 compute_aggr_of_coord(coord); |
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366 |
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367 /* Clean member shapes. */ |
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368 cnt = 0; |
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369 for(shape = STAILQ_HEAD(coord->members); |
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370 shape != NULL; |
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371 shape = STAILQ_NEXT(shape_t, coord_mem_next, shape)) { |
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372 geo = shape->geo; |
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373 SWAP(geo->cur_area, geo->last_area, area_t *); |
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374 clean_shape(shape); |
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375 cnt++; |
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376 } |
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377 |
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378 /* Compute area of the coord. */ |
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379 poses = (co_aix (*)[2])malloc(sizeof(co_aix [2]) * 2 * cnt); |
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380 if(poses == NULL) |
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381 return ERR; |
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382 |
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383 pos_cnt = 0; |
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384 for(shape = STAILQ_HEAD(coord->members); |
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385 shape != NULL; |
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386 shape = STAILQ_NEXT(shape_t, coord_mem_next, shape)) { |
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387 geo = shape->geo; |
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388 |
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389 area_to_positions(&geo->areas[0], poses + pos_cnt); |
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390 pos_cnt += 2; |
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391 area_to_positions(&geo->areas[1], poses + pos_cnt); |
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392 pos_cnt += 2; |
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393 } |
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394 |
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395 #if 0 |
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396 for(i = 0; i < pos_cnt; i++) |
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397 coord_trans_pos(coord, &poses[i][0], &poses[i][1]); |
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398 #endif |
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399 |
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400 SWAP(coord->cur_area, coord->last_area, area_t *); |
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401 area_init(coord->cur_area, pos_cnt, poses); |
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402 free(poses); |
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403 |
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404 coord->flags &= ~COF_DIRTY; |
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405 |
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406 return OK; |
| 13 | 407 } |
| 408 | |
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409 static int clean_rdman_coords(redraw_man_t *rdman) { |
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410 coord_t *coord; |
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411 coord_t **dirty_coords; |
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412 int n_dirty_coords; |
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413 int i, r; |
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414 |
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415 n_dirty_coords = rdman->n_dirty_coords; |
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416 if(n_dirty_coords > 0) { |
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417 dirty_coords = rdman->dirty_coords; |
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418 _insert_sort((void **)dirty_coords, n_dirty_coords, |
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419 OFFSET(coord_t, order)); |
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420 for(i = 0; i < n_dirty_coords; i++) { |
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421 coord = dirty_coords[i]; |
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422 if(!(coord->flags & COF_DIRTY)) |
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423 continue; |
|
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424 r = clean_coord(coord); |
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425 if(r != OK) |
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A simple animation using rdman_redraw_changed().
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426 return ERR; |
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427 /* These two steps can be avoided for drawing all. */ |
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428 add_dirty_area(rdman, &coord->areas[0]); |
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A simple animation using rdman_redraw_changed().
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429 add_dirty_area(rdman, &coord->areas[1]); |
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A simple animation using rdman_redraw_changed().
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430 } |
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431 rdman->n_dirty_coords = 0; |
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A simple animation using rdman_redraw_changed().
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432 } |
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433 return OK; |
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A simple animation using rdman_redraw_changed().
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434 } |
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435 |
| 14 | 436 static void draw_shape(redraw_man_t *rdman, shape_t *shape) { |
|
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437 switch(shape->sh_type) { |
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438 case SHT_PATH: |
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439 sh_path_draw(shape, rdman->cr); |
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440 break; |
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441 } |
| 13 | 442 } |
| 443 | |
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444 static void clean_clip(cairo_t *cr) { |
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445 cairo_pattern_t *pt; |
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446 |
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447 pt = cairo_get_source(cr); |
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448 cairo_pattern_reference(pt); |
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449 /* TODO: clean to background color. */ |
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450 cairo_set_source_rgb(cr, 0, 0, 0); |
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451 cairo_fill_preserve(cr); |
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452 cairo_set_source(cr, pt); |
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453 cairo_pattern_destroy(pt); |
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454 } |
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455 |
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456 static void make_clip(redraw_man_t *rdman, int n_dirty_areas, |
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457 area_t **dirty_areas) { |
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458 int i; |
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459 area_t *area; |
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460 cairo_t *cr; |
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461 |
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462 cr = rdman->cr; |
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463 |
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464 cairo_reset_clip(cr); |
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465 for(i = 0; i < n_dirty_areas; i++) { |
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466 area = dirty_areas[i]; |
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467 cairo_rectangle(cr, area->x, area->y, area->w, area->h); |
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468 } |
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469 clean_clip(cr); |
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470 cairo_clip(cr); |
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471 } |
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472 |
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473 static void draw_shapes_in_areas(redraw_man_t *rdman, |
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474 int n_areas, |
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475 area_t **areas) { |
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476 geo_t *visit_geo; |
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477 int i; |
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478 |
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479 for(visit_geo = STAILQ_HEAD(rdman->all_geos); |
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480 visit_geo != NULL; |
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481 visit_geo = STAILQ_NEXT(geo_t, next, visit_geo)) { |
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482 if(visit_geo->flags & GEF_DIRTY) |
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483 clean_shape(visit_geo->shape); |
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484 for(i = 0; i < n_areas; i++) { |
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485 if(is_overlay(visit_geo->cur_area, areas[i])) { |
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486 draw_shape(rdman, visit_geo->shape); |
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487 break; |
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488 } |
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489 } |
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490 } |
| 13 | 491 } |
| 492 | |
| 493 /*! \brief Re-draw all changed shapes or shapes affected by changed coords. | |
| 494 * | |
| 495 * A coord object has a geo to keep track the range that it's members will | |
| 496 * draw on. Geo of a coord should be recomputed when the coord is changed. | |
| 497 * Geo of a coord used to accelerate finding overlay shape objects of | |
| 498 * a specified geo. A coord object also must be recomputed when one of | |
| 499 * it's members is changed. | |
| 500 * | |
| 501 * New and old geo values of a coord object that is recomputed for | |
| 502 * changing of it-self must be used to find overlay shape objects. | |
| 503 * New and old geo values of a shape should also be used to find | |
| 504 * overlay shape objects, too. If a shape's coord is changed, shape's | |
| 505 * geo object is not used to find overlay shape objects any more. | |
| 506 * | |
| 507 * steps: | |
| 508 * - update chagned coord objects | |
| 14 | 509 * - recompute area for changed coord objects |
| 13 | 510 * - recompute geo for members shape objects |
| 14 | 511 * - clear dirty of geo for members to prevent from |
| 512 * recomputing for change of shape objects. | |
| 513 * - add old and new area value to list of dirty areas. | |
| 13 | 514 * - recompute geo for changed shape objects |
| 14 | 515 * - only if a shape object is dirty. |
| 516 * - put new and old value of area of geo to list of dirty areas. | |
| 517 * - Scan all shapes and redraw shapes overlaid with dirty areas. | |
| 13 | 518 * |
| 14 | 519 * dirty flag of coord objects is cleared after update. |
|
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520 * dirty flag of geo objects is also cleared after recomputing. |
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521 * Clean dirty flag can prevent redundant computing for geo and |
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522 * corod objects. |
| 14 | 523 * |
| 13 | 524 */ |
| 525 int rdman_redraw_changed(redraw_man_t *rdman) { | |
|
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526 int i, r; |
| 14 | 527 geo_t *visit_geo, **dirty_geos; |
| 528 int n_dirty_geos; | |
| 13 | 529 int n_dirty_areas; |
| 14 | 530 area_t **dirty_areas; |
| 13 | 531 |
|
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532 r = clean_rdman_coords(rdman); |
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533 if(r != OK) |
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534 return ERR; |
| 13 | 535 |
| 14 | 536 n_dirty_geos = rdman->n_dirty_geos; |
| 537 if(n_dirty_geos > 0) { | |
| 538 dirty_geos = rdman->dirty_geos; | |
| 539 for(i = 0; i < n_dirty_geos; i++) { | |
| 540 visit_geo = dirty_geos[i]; | |
| 13 | 541 if(!(visit_geo->flags & GEF_DIRTY)) |
| 542 continue; | |
| 543 | |
| 544 SWAP(visit_geo->cur_area, visit_geo->last_area, area_t *); | |
|
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545 clean_shape(visit_geo->shape); |
| 13 | 546 add_dirty_area(rdman, visit_geo->cur_area); |
| 547 add_dirty_area(rdman, visit_geo->last_area); | |
| 548 } | |
|
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549 rdman->n_dirty_geos = 0; |
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550 } |
| 13 | 551 |
|
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552 n_dirty_areas = rdman->n_dirty_areas; |
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553 dirty_areas = rdman->dirty_areas; |
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554 if(n_dirty_areas > 0) { |
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555 make_clip(rdman, n_dirty_areas, dirty_areas); |
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556 draw_shapes_in_areas(rdman, n_dirty_areas, dirty_areas); |
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557 rdman->n_dirty_areas = 0; |
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558 } |
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559 rdman->n_dirty_areas = 0; |
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560 |
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A simple animation using rdman_redraw_changed().
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561 cairo_reset_clip(rdman->cr); |
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562 |
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563 return OK; |
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564 } |
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565 |
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566 int rdman_redraw_all(redraw_man_t *rdman) { |
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567 geo_t *geo; |
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568 |
|
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569 clean_rdman_coords(rdman); |
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570 rdman->n_dirty_areas = 0; |
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A simple animation using rdman_redraw_changed().
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571 |
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A simple animation using rdman_redraw_changed().
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572 cairo_reset_clip(rdman->cr); |
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573 for(geo = STAILQ_HEAD(rdman->all_geos); |
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574 geo != NULL; |
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575 geo = STAILQ_NEXT(geo_t, next, geo)) { |
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576 if(geo->flags & GEF_DIRTY) |
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577 clean_shape(geo->shape); |
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578 draw_shape(rdman, geo->shape); |
| 13 | 579 } |
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580 cairo_reset_clip(rdman->cr); |
| 13 | 581 |
| 582 return OK; | |
| 12 | 583 } |
| 584 | |
| 585 /* | |
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586 * Dirty of geo |
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587 * A geo is dirty when any of the shape, size or positions is changed. |
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588 * It's geo and positions should be recomputed before drawing. So, |
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589 * dirty geos are marked as dirty and put into dirty_geos list. |
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590 * The list is inspected before drawing to make sure the right shape, |
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591 * size, and positions. |
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592 * |
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593 * Dirty of coord |
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594 * A coord is dirty when it's transformation matrix being changed. |
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595 * Dirty coords are marked as dirty and put into dirty_coords list. |
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596 * Once a coord is dirty, every member geos of it are also dirty. |
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597 * Because, their shape, size and positions will be changed. But, |
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598 * they are not marked as dirty and put into dirty_geos list, since |
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599 * all these member geos will be recomputed for computing new current |
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600 * area of the coord. The changes of a coord also affect child |
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601 * coords. Once parent is dirty, all children are also dirty for |
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602 * their aggregate matrix out of date. Dirty coords should be |
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603 * clean in preorder of tree traversal. The dirty_coords list |
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604 * are sorted to keep the order before cleaning. |
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605 * Whenever a coord is marked dirty and put into dirty_coords list, |
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606 * all it's children should also be marked and put. |
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607 * |
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608 * The procedure of clean coords comprises recomputing aggregate |
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609 * tranform matrix and area where members spreading in. |
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610 * |
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611 * The list is inspected before drawing to recompute new shape, size, |
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612 * and positions of member geos of coords in the list. The drity |
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613 * flag of member geos will be clean. |
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614 * |
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615 * Clean coords should be performed before clean geos, since clean |
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616 * coords will also clean member geos. |
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617 */ |
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618 |
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619 /* |
| 12 | 620 * When redraw an area, the affected elements may also extend to |
| 621 * outside of the area. Since the order of drawing will change | |
| 622 * the result, it will infect more and more elements to keep | |
| 623 * drawing order althrough they are overlaid directly with | |
| 624 * specified area. | |
| 625 * | |
| 626 * To fix the problem, we don't extend the set of redrawing to | |
| 627 * elements they are not overliad directly. The redrawing is | |
| 628 * performed on a temporary surface, clipped to fit the area, and | |
| 629 * update only specified area on the destinate surface. | |
| 630 */ | |
| 631 | |
| 632 /* | |
| 633 * To accelerate speed of transformation, when a matrix changed, | |
| 634 * transformation should be aggregated and computed in a loop. | |
| 635 * It can get intereset of higher hit rate of cache. | |
| 636 * - shapes prvoide list of positions needed to be transformed. | |
| 637 * - redraw_man transforms positions from shapes. | |
| 638 * - shapes drawing with result of transforms. | |
| 639 * - shapes should be called to give them a chance to update geometries. | |
| 640 */ | |
| 641 | |
| 13 | 642 /* |
| 643 * functions: | |
| 644 * - redraw all | |
| 645 * - redraw changed | |
| 646 */ | |
| 647 | |
| 12 | 648 #ifdef UNITTEST |
| 649 | |
| 650 #include <CUnit/Basic.h> | |
| 651 | |
| 652 struct _sh_dummy { | |
| 653 shape_t shape; | |
| 654 co_aix x, y; | |
| 655 co_aix w, h; | |
| 656 }; | |
| 657 typedef struct _sh_dummy sh_dummy_t; | |
| 658 | |
| 659 shape_t *sh_dummy_new(co_aix x, co_aix y, co_aix w, co_aix h) { | |
| 660 sh_dummy_t *dummy; | |
| 661 | |
| 662 dummy = (sh_dummy_t *)malloc(sizeof(sh_dummy_t)); | |
| 663 if(dummy == NULL) | |
| 664 return NULL; | |
| 665 | |
| 666 dummy->x = x; | |
| 667 dummy->y = y; | |
| 668 dummy->w = w; | |
| 669 dummy->h = h; | |
| 670 | |
| 671 return (shape_t *)dummy; | |
| 672 } | |
| 673 | |
| 674 void sh_dummy_free(shape_t *sh) { | |
| 675 free(sh); | |
| 676 } | |
| 677 | |
| 678 void sh_dummy_transform(shape_t *shape) { | |
| 679 sh_dummy_t *dummy = (sh_dummy_t *)shape; | |
| 680 co_aix poses[2][2]; | |
| 681 co_aix x1, y1, x2, y2; | |
| 682 | |
| 683 if(shape->geo && shape->coord) { | |
| 684 x1 = dummy->x; | |
| 685 y1 = dummy->y; | |
| 686 x2 = x1 + dummy->w; | |
| 687 y2 = y1 + dummy->h; | |
| 688 | |
| 689 coord_trans_pos(shape->coord, &x1, &y1); | |
| 690 coord_trans_pos(shape->coord, &x2, &y2); | |
| 691 poses[0][0] = x1; | |
| 692 poses[0][1] = y1; | |
| 693 poses[1][0] = x2; | |
| 694 poses[1][1] = y2; | |
| 695 | |
| 696 geo_init(shape->geo, 2, poses); | |
| 697 } | |
| 698 } | |
| 699 | |
| 700 void test_rdman_find_overlaid_shapes(void) { | |
| 701 redraw_man_t rdman; | |
| 702 geo_t geo; | |
| 703 coord_t *coords[3]; | |
| 704 shape_t *shapes[5]; | |
| 705 geo_t **overlays; | |
| 13 | 706 co_aix pos[2][2]; |
| 12 | 707 int n; |
| 708 int i; | |
| 709 | |
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710 redraw_man_init(&rdman, NULL); |
| 12 | 711 coords[0] = rdman.root_coord; |
| 712 for(i = 1; i < 3; i++) { | |
| 713 coords[i] = rdman_coord_new(&rdman, rdman.root_coord); | |
| 714 } | |
| 715 for(i = 0; i < 5; i++) { | |
| 716 shapes[i] = sh_dummy_new(10 + i * 30, 10 + i * 20, 25, 15); | |
| 717 CU_ASSERT(shapes[i] != NULL); | |
| 718 } | |
| 719 for(i = 0; i < 3; i++) | |
| 720 rdman_add_shape(&rdman, shapes[i], coords[1]); | |
| 721 for(i = 3; i < 5; i++) | |
| 722 rdman_add_shape(&rdman, shapes[i], coords[2]); | |
| 723 | |
| 724 coords[1]->matrix[0] = 2; | |
| 725 coords[0]->matrix[4] = 2; | |
| 726 | |
| 727 update_aggr_matrix(coords[0]); | |
| 728 for(i = 0; i < 5; i++) | |
| 729 sh_dummy_transform(shapes[i]); | |
| 730 | |
| 13 | 731 pos[0][0] = 100; |
| 732 pos[0][1] = 120; | |
| 733 pos[1][0] = 100 + 140; | |
| 734 pos[1][1] = 120 + 40; | |
| 735 geo_init(&geo, 2, pos); | |
| 12 | 736 |
| 737 n = rdman_find_overlaid_shapes(&rdman, &geo, &overlays); | |
| 738 CU_ASSERT(n == 2); | |
| 739 CU_ASSERT(overlays != NULL); | |
| 740 CU_ASSERT(overlays[0] == shapes[2]->geo); | |
| 741 CU_ASSERT(overlays[1] == shapes[3]->geo); | |
| 742 | |
| 743 free(overlays); | |
| 744 for(i = 0; i < 5; i++) | |
| 745 sh_dummy_free(shapes[i]); | |
| 746 | |
| 747 redraw_man_destroy(&rdman); | |
| 748 } | |
| 749 | |
| 750 CU_pSuite get_redraw_man_suite(void) { | |
| 751 CU_pSuite suite; | |
| 752 | |
| 753 suite = CU_add_suite("Suite_redraw_man", NULL, NULL); | |
| 754 CU_ADD_TEST(suite, test_rdman_find_overlaid_shapes); | |
| 755 | |
| 756 return suite; | |
| 757 } | |
| 758 | |
| 759 #endif /* UNITTEST */ |