Mercurial > MadButterfly

annotate src/chgcolor.c @ 1434:4be04f29fa70

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Add functions to search for the text recursively inside coord_t tree. Once we find the first instance, we change the text of it. We need to think about how to manage the multiple segment texts, which is composed of several tspan.
author wycc
date Mon, 11 Apr 2011 12:52:09 +0800
parents 586e50f82c1f
children
rev   line source
822
586e50f82c1f Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
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2 // vim: sw=4:ts=8:sts=4
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include "mb_animate.h"
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6 #include "mb_paint.h"
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7
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8 static float comp_mb_timeval_ratio(const mb_timeval_t *a,
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9 const mb_timeval_t *b) {
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10 float ratio;
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11
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12 ratio = (float)MB_TIMEVAL_SEC(a) * 1000000.0 + (float)MB_TIMEVAL_USEC(a);
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13 ratio /= (float)MB_TIMEVAL_SEC(b) * 1000000.0 + (float)MB_TIMEVAL_USEC(b);
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14 return ratio;
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15 }
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16
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17 typedef struct _mb_chgcolor mb_chgcolor_t;
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18
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19 struct _mb_chgcolor {
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20 mb_action_t action;
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21
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22 co_comp_t r, g, b, a;
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23 paint_t *paint;
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24
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25 mb_timeval_t start_time;
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26 const mb_timeval_t *playing_time;
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27 co_comp_t s_r, s_g, s_b, s_a; /*!< saved RGBA values. */
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28 };
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29
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30 static void mb_chgcolor_start(mb_action_t *act,
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31 const mb_timeval_t *now,
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32 const mb_timeval_t *playing_time,
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33 redraw_man_t *rdman) {
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34 mb_chgcolor_t *chg = (mb_chgcolor_t *)act;
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35
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36 MB_TIMEVAL_CP(&chg->start_time, now);
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37 chg->playing_time = playing_time; /* playing_time is in word,
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38 * it live time is as long as
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39 * actions. */
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40 paint_color_get(chg->paint,
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41 &chg->s_r, &chg->s_g,
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42 &chg->s_b, &chg->s_a);
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43 }
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44
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45 static void mb_chgcolor_step(mb_action_t *act,
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46 const mb_timeval_t *now,
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47 redraw_man_t *rdman) {
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48 mb_chgcolor_t *chg = (mb_chgcolor_t *)act;
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49 mb_timeval_t diff;
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50 co_comp_t r, g, b, a;
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51 float ratio, comp;
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52
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53 MB_TIMEVAL_CP(&diff, now);
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54 MB_TIMEVAL_DIFF(&diff, &chg->start_time);
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55 ratio = comp_mb_timeval_ratio(&diff, chg->playing_time);
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56 comp = 1 - ratio;
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57
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58 r = chg->s_r * comp + ratio * chg->r;
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59 g = chg->s_g * comp + ratio * chg->g;
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60 b = chg->s_b * comp + ratio * chg->b;
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61 a = chg->s_a * comp + ratio * chg->a;
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62 paint_color_set(chg->paint, r, g, b, a);
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63
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64 rdman_paint_changed(rdman, chg->paint);
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65 }
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66
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67 static void mb_chgcolor_stop(mb_action_t *act,
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68 const mb_timeval_t *now,
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69 redraw_man_t *rdman) {
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70 mb_chgcolor_t *chg = (mb_chgcolor_t *)act;
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71
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72 paint_color_set(chg->paint, chg->r, chg->g, chg->b, chg->a);
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73
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74 rdman_paint_changed(rdman, chg->paint);
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75 }
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76
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77 static void mb_chgcolor_free(mb_action_t *act) {
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78 free(act);
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79 }
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80
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81 mb_action_t *mb_chgcolor_new(co_comp_t r, co_comp_t g,
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82 co_comp_t b, co_comp_t a,
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83 paint_t *paint, mb_word_t *word) {
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84 mb_chgcolor_t *chg;
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85
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86 chg = (mb_chgcolor_t *)malloc(sizeof(mb_chgcolor_t));
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87 if(chg == NULL)
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88 return NULL;
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89
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90 chg->r = r;
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91 chg->g = g;
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92 chg->b = b;
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93 chg->a = a;
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94
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95 chg->paint = paint;
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96
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97 chg->action.start = mb_chgcolor_start;
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98 chg->action.step = mb_chgcolor_step;
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99 chg->action.stop = mb_chgcolor_stop;
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100 chg->action.free = mb_chgcolor_free;
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101
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102 mb_word_add_action(word, (mb_action_t *)chg);
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103
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104 return (mb_action_t *)chg;
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105 }
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106
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107