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comparison src/redraw_man.c @ 133:4c2d83721bcc

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author Thinker K.F. Li <thinker@branda.to>
date Wed, 17 Sep 2008 13:40:39 +0800
parents 76ba6fd61c7d
children 81c03fdd94d0
comparison
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132:c65b30e2eda9 133:4c2d83721bcc
521 521
522 coord->flags &= ~COF_DIRTY; 522 coord->flags &= ~COF_DIRTY;
523 523
524 return OK; 524 return OK;
525 } 525 }
526
527 /*! \page dirty Relationships of dirty coord, geo, and area.
528 *
529 * A coord_t instance is dirty if it's matrix had been changed. Once
530 * it is changed, all shapes in it's descendants would be effected.
531 * Shapes in descendants are dirtied. Dirty coords and dirty shapes
532 * should be clean. The procedure of clean for dirty coords re-compute
533 * aggregated matric and areas of coords. The area of a coord is a
534 * rectangle area where member shapes of the coord occupy. Old
535 * and new value of coord area are putten into dirty area list.
536 *
537 * A dirty shape means it's geo being dirty. A dirty geo is clean by
538 * recomputing area and transform shape it-self according aggregated
539 * matrix of the coord that it is a member of. Old and new value of
540 * geo area are also putten into dirty area list.
541 *
542 * Shapes that should be redrawed are selected by if it overlaid with any
543 * of dirty areas. Once it overlaid with one or more dirty areas, it
544 * is redrawed.
545 */
526 546
527 static int clean_rdman_coords(redraw_man_t *rdman) { 547 static int clean_rdman_coords(redraw_man_t *rdman) {
528 coord_t *coord; 548 coord_t *coord;
529 coord_t **dirty_coords; 549 coord_t **dirty_coords;
530 int n_dirty_coords; 550 int n_dirty_coords;