view src/chgcolor.c @ 1401:2fc1f54a1a3b

Mainly fix the clone_from_subtree to update the children of the parent node. We need to clearify all related codes in the future to make the logic more clear.
author wycc
date Sun, 03 Apr 2011 18:12:42 +0800
parents 586e50f82c1f
children
line wrap: on
line source

// -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
// vim: sw=4:ts=8:sts=4
#include <stdio.h>
#include <stdlib.h>
#include "mb_animate.h"
#include "mb_paint.h"

static float comp_mb_timeval_ratio(const mb_timeval_t *a,
				   const mb_timeval_t *b) {
    float ratio;

    ratio = (float)MB_TIMEVAL_SEC(a) * 1000000.0 + (float)MB_TIMEVAL_USEC(a);
    ratio /= (float)MB_TIMEVAL_SEC(b) * 1000000.0 + (float)MB_TIMEVAL_USEC(b);
    return ratio;
}

typedef struct _mb_chgcolor mb_chgcolor_t;

struct _mb_chgcolor {
    mb_action_t action;

    co_comp_t r, g, b, a;
    paint_t *paint;

    mb_timeval_t start_time;
    const mb_timeval_t *playing_time;
    co_comp_t s_r, s_g, s_b, s_a; /*!< saved RGBA values. */
};

static void mb_chgcolor_start(mb_action_t *act,
			      const mb_timeval_t *now,
			      const mb_timeval_t *playing_time,
			      redraw_man_t *rdman) {
    mb_chgcolor_t *chg = (mb_chgcolor_t *)act;

    MB_TIMEVAL_CP(&chg->start_time, now);
    chg->playing_time = playing_time; /* playing_time is in word,
				       * it live time is as long as
				       * actions. */
    paint_color_get(chg->paint,
		    &chg->s_r, &chg->s_g,
		    &chg->s_b, &chg->s_a);
}

static void mb_chgcolor_step(mb_action_t *act,
			     const mb_timeval_t *now,
			     redraw_man_t *rdman) {
    mb_chgcolor_t *chg = (mb_chgcolor_t *)act;
    mb_timeval_t diff;
    co_comp_t r, g, b, a;
    float ratio, comp;

    MB_TIMEVAL_CP(&diff, now);
    MB_TIMEVAL_DIFF(&diff, &chg->start_time);
    ratio = comp_mb_timeval_ratio(&diff, chg->playing_time);
    comp = 1 - ratio;

    r = chg->s_r * comp + ratio * chg->r;
    g = chg->s_g * comp + ratio * chg->g;
    b = chg->s_b * comp + ratio * chg->b;
    a = chg->s_a * comp + ratio * chg->a;
    paint_color_set(chg->paint, r, g, b, a);

    rdman_paint_changed(rdman, chg->paint);
}

static void mb_chgcolor_stop(mb_action_t *act,
			     const mb_timeval_t *now,
			     redraw_man_t *rdman) {
    mb_chgcolor_t *chg = (mb_chgcolor_t *)act;

    paint_color_set(chg->paint, chg->r, chg->g, chg->b, chg->a);

    rdman_paint_changed(rdman, chg->paint);
}

static void mb_chgcolor_free(mb_action_t *act) {
    free(act);
}

mb_action_t *mb_chgcolor_new(co_comp_t r, co_comp_t g,
			     co_comp_t b, co_comp_t a,
			     paint_t *paint, mb_word_t *word) {
    mb_chgcolor_t *chg;

    chg = (mb_chgcolor_t *)malloc(sizeof(mb_chgcolor_t));
    if(chg == NULL)
	return NULL;

    chg->r = r;
    chg->g = g;
    chg->b = b;
    chg->a = a;

    chg->paint = paint;

    chg->action.start = mb_chgcolor_start;
    chg->action.step = mb_chgcolor_step;
    chg->action.stop = mb_chgcolor_stop;
    chg->action.free = mb_chgcolor_free;

    mb_word_add_action(word, (mb_action_t *)chg);

    return (mb_action_t *)chg;
}