Mercurial > MadButterfly

annotate src/shift.c @ 489:23c7667b3ec0 Android_Skia

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Fix a potential bug when destroy a rdman. When a rdman is dirty, free shapes and coords works specially. Objects are append to a free list. They are not real freed until rdman being clean. redraw_man_destroy() free shapes and coords with free functions of them. If rdman is dirty when destroy it, objects would be leaked. The changeset make rdman clean before free shapes and coords to make objects being freed correctly.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 22 Nov 2009 20:41:27 +0800
parents 45d9a1e2764d
children 586e50f82c1f
rev   line source
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <string.h>
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530bb7728546 Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
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4 #include "mb_animate.h"
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5
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6 static float comp_mb_timeval_ratio(const mb_timeval_t *a,
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7 const mb_timeval_t *b) {
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8 float ratio;
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9
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10 ratio = (float)MB_TIMEVAL_SEC(a) * 1000000.0 + (float)MB_TIMEVAL_USEC(a);
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11 ratio /= (float)MB_TIMEVAL_SEC(b) * 1000000.0 + (float)MB_TIMEVAL_USEC(b);
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12 return ratio;
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13 }
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14
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15 typedef struct _mb_shift mb_shift_t;
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16 /*! \brief Animation action for relative shift a coordination. */
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17 struct _mb_shift {
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18 mb_action_t action;
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19
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20 co_aix x, y;
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21 coord_t *coord;
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22
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23 mb_timeval_t start_time;
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24 co_aix saved_matrix[6];
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25 const mb_timeval_t *playing_time;
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26 };
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27
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28 static void mb_shift_start(mb_action_t *act,
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29 const mb_timeval_t *now,
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30 const mb_timeval_t *playing_time,
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31 redraw_man_t *rdman) {
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32 mb_shift_t *shift = (mb_shift_t *)act;
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33 coord_t *coord;
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34
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35 MB_TIMEVAL_CP(&shift->start_time, now);
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36 coord = shift->coord;
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37 memcpy(&shift->saved_matrix, coord->matrix, sizeof(co_aix[6]));
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38 shift->playing_time = playing_time;
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39 }
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40
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41 static void mb_shift_step(mb_action_t *act, const mb_timeval_t *now,
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42 redraw_man_t *rdman) {
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43 mb_shift_t *shift = (mb_shift_t *)act;
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44 mb_timeval_t diff;
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45 coord_t *coord;
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46 float ratio;
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47
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48
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49 MB_TIMEVAL_CP(&diff, now);
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50 MB_TIMEVAL_DIFF(&diff, &shift->start_time);
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51 ratio = comp_mb_timeval_ratio(&diff, shift->playing_time);
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52
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53 coord = shift->coord;
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54 coord->matrix[2] = shift->saved_matrix[2] + shift->x * ratio;
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55 coord->matrix[5] = shift->saved_matrix[5] + shift->y * ratio;
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56
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57 rdman_coord_changed(rdman, coord);
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58 }
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59
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60 static void mb_shift_stop(mb_action_t *act, const mb_timeval_t *now,
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61 redraw_man_t *rdman) {
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62 mb_shift_t *shift = (mb_shift_t *)act;
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63 coord_t *coord;
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64
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65 coord = shift->coord;
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66 coord->matrix[2] = shift->saved_matrix[2] + shift->x;
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67 coord->matrix[5] = shift->saved_matrix[5] + shift->y;
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68
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69 rdman_coord_changed(rdman, coord);
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70 }
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71
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72
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73 static void mb_shift_free(mb_action_t *act) {
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74 free(act);
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75 }
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76
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77 mb_action_t *mb_shift_new(co_aix x, co_aix y, coord_t *coord,
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78 mb_word_t *word) {
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79 mb_shift_t *shift;
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80
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81 shift = (mb_shift_t *)malloc(sizeof(mb_shift_t));
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82 if(shift == NULL)
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83 return NULL;
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84
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85 shift->x = x;
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86 shift->y = y;
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87 shift->coord = coord;
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88
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89 shift->action.start = mb_shift_start;
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90 shift->action.step = mb_shift_step;
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91 shift->action.stop = mb_shift_stop;
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92 shift->action.free = mb_shift_free;
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93
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94 /*! \note mb_shift_new() will add itself to the specified word. */
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95 mb_word_add_action(word, (mb_action_t *)shift);
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96
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97 return (mb_action_t *)shift;
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98 }