summaryrefslogtreecommitdiffstats
path: root/apps/plugins/starfield.c
blob: dff3c4b4d18c47ce049af6d6b70154bc4b600b1b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
/***************************************************************************
*             __________               __   ___.
*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
*                     \/            \/     \/    \/            \/
* Copyright (C) 2005 Kevin Ferrare
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/

#include "plugin.h"
#include "lib/helper.h"
#include "lib/pluginlib_exit.h"
#include "lib/pluginlib_actions.h"
/******************************* Globals ***********************************/
/* this set the context to use with PLA */
static const struct button_mapping *plugin_contexts[] = { pla_main_ctx };

/* Key assignement */
#define STARFIELD_QUIT                        PLA_EXIT
#define STARFIELD_QUIT2                       PLA_CANCEL
#define STARFIELD_INCREASE_ZMOVE              PLA_UP
#define STARFIELD_INCREASE_ZMOVE_REPEAT       PLA_UP_REPEAT
#define STARFIELD_DECREASE_ZMOVE              PLA_DOWN
#define STARFIELD_DECREASE_ZMOVE_REPEAT       PLA_DOWN_REPEAT
#define STARFIELD_INCREASE_NB_STARS           PLA_RIGHT
#define STARFIELD_INCREASE_NB_STARS_REPEAT    PLA_RIGHT_REPEAT
#define STARFIELD_DECREASE_NB_STARS           PLA_LEFT
#define STARFIELD_DECREASE_NB_STARS_REPEAT    PLA_LEFT_REPEAT
#define STARFIELD_TOGGLE_COLOR                PLA_SELECT

#define LCD_CENTER_X (LCD_WIDTH/2)
#define LCD_CENTER_Y (LCD_HEIGHT/2)
#define Z_MAX_DIST 100

#define MAX_STARS (LCD_WIDTH*LCD_HEIGHT*20)/100
#define INIT_STARS 200
#define STARFIELD_INCREASE_STEP 50
#define INIT_SPACE_SPEED 1
#define STAR_MAX_VELOCITY 2
/*
 * max 3d coord in the 2d screen :
 * example with x
 *  x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...)
 * so
 *  max_x2d=max_x3d/max_z+LCD_CENTER_X
 *  max_x3d=(max_x2d-LCD_CENTER_X)*max_z
 * with
 *  max_x2d = LCD_WIDTH
 *  max_z = Z_MAX_DIST
 * we have now
 * max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST
 * max_x3d=LCD_CENTER_X*Z_MAX_DIST
 */

#define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST
#define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST

#define MSG_DISP_TIME 30

/*
 * Each star's stuffs
 */
struct star
{
    int x,y,z;
    int velocity;
#ifdef HAVE_LCD_COLOR
    int color;
#endif
};

static inline void star_init(struct star * star, int z_move, bool color)
{
    star->velocity=rb->rand() % STAR_MAX_VELOCITY+1;
    /* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */
    star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X;
    star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y;
#ifdef HAVE_LCD_COLOR
    if(color)
        star->color=LCD_RGBPACK(rb->rand()%128+128,rb->rand()%128+128,
                                rb->rand()%128+128);
    else
        star->color=LCD_WHITE;
#else
    (void)color;
#endif
    if(z_move>=0)
        star->z=Z_MAX_DIST;
    else
        star->z=rb->rand() %Z_MAX_DIST/2+1;
}

static inline void star_move(struct star * star, int z_move, bool color)
{
    star->z -= z_move*star->velocity;
    if (star->z <= 0 || star->z > Z_MAX_DIST)
        star_init(star, z_move, color);
}

static inline void star_draw(struct star * star, int z_move, bool color)
{
    int x_draw, y_draw;
    /*
     * 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem)
     * we put the star in the center of the screen
     */
    x_draw = star->x / star->z + LCD_CENTER_X;
    if (x_draw < 1 || x_draw >= LCD_WIDTH)
    {
        star_init(star, z_move, color);
        return;
    }
    y_draw  = star->y / star->z + LCD_CENTER_Y;
    if (y_draw < 1 || y_draw >= LCD_HEIGHT)
    {
        star_init(star, z_move, color);
        return;
    }

#ifdef HAVE_LCD_COLOR
    rb->lcd_set_foreground(star->color);
#endif

    rb->lcd_drawpixel(x_draw, y_draw);
    if(star->z<5*Z_MAX_DIST/6)
    {
        rb->lcd_drawpixel(x_draw, y_draw - 1);
        rb->lcd_drawpixel(x_draw - 1, y_draw);
        if(star->z<Z_MAX_DIST/2)
        {
            rb->lcd_drawpixel(x_draw + 1, y_draw);
            rb->lcd_drawpixel(x_draw, y_draw + 1);
        }
    }
}

/*
 * Whole starfield operations
 */
struct starfield
{
    struct star tab[MAX_STARS];
    int nb_stars;
    int z_move;
    bool color;
};

static inline void starfield_init(struct starfield * starfield)
{
    starfield->nb_stars=0;
    starfield->z_move=INIT_SPACE_SPEED;
    starfield->color=false;
}

static inline void starfield_add_stars(struct starfield * starfield,
                                       int nb_to_add)
{
    int i, old_nb_stars;
    old_nb_stars=starfield->nb_stars;
    starfield->nb_stars+=nb_to_add;

    if(starfield->nb_stars > MAX_STARS)
        starfield->nb_stars=MAX_STARS;

    for( i=old_nb_stars ; i < starfield->nb_stars ; ++i )
    {
        star_init( &(starfield->tab[i]), starfield->z_move, starfield->color );
    }
}

static inline void starfield_del_stars(struct starfield * starfield,
                                       int nb_to_add)
{
    starfield->nb_stars-=nb_to_add;
    if(starfield->nb_stars<0)
        starfield->nb_stars=0;
}

static inline void starfield_move_and_draw(struct starfield * starfield)
{
    int i;
    for(i=0;i<starfield->nb_stars;++i)
    {
        star_move(&(starfield->tab[i]), starfield->z_move, starfield->color);
        star_draw(&(starfield->tab[i]), starfield->z_move, starfield->color);
    }
}

static struct starfield starfield;

static int plugin_main(void)
{
    int button, avg_peak, t_disp=0;
    int font_h, font_w;
    bool pulse __attribute__ ((unused)) = true; /* 'unused' resolves warnings */
    rb->lcd_getstringsize("A", &font_w, &font_h);
    starfield_init(&starfield);
    starfield_add_stars(&starfield, INIT_STARS);

#if LCD_DEPTH > 1
     rb->lcd_set_backdrop(NULL);
#endif
#ifdef HAVE_LCD_COLOR
    rb->lcd_set_background(LCD_BLACK);
    rb->lcd_set_foreground(LCD_WHITE);
#endif

    while (true)
    {
        rb->sleep(1);
        rb->lcd_clear_display();

#if (CONFIG_CODEC == SWCODEC)
        /* This will make the stars pulse to the music */
        if(pulse){

            /* Get the peaks. ( Borrowed from vu_meter ) */
            static struct pcm_peaks peaks;
            rb->mixer_channel_calculate_peaks(PCM_MIXER_CHAN_PLAYBACK,
                                              &peaks);
            #define left_peak peaks.left
            #define right_peak peaks.right

            /* Devide peak data by 4098 to bring the max
               value down from ~32k to 8 */
            left_peak  =    left_peak/0x1000;
            right_peak =    right_peak/0x1000;

            /* Make sure they dont stop */
            if(left_peak<0x1)
                left_peak     = 0x1;
            if(right_peak<0x1)
                right_peak    = 0x1;

            /* And make sure they dont go over 8 */
            if(left_peak>0x8)
                left_peak     = 0x8;
            if(right_peak>0x8)
                right_peak    = 0x8;

            /* We need the average of both chanels */
            avg_peak     = ( left_peak + right_peak )/2;

            /* Set the speed to the peak meter */
            starfield.z_move = avg_peak;

        } /* if pulse */
#endif
        starfield_move_and_draw(&starfield);

#ifdef HAVE_LCD_COLOR
        rb->lcd_set_foreground(LCD_WHITE);
#endif

        /* if a parameter is updated (by the user), we must print it */
        if (t_disp > 0)
        {
            --t_disp;
#ifdef HAVE_LCD_COLOR
            rb->lcd_set_foreground(LCD_WHITE);
#endif
            rb->lcd_putsxyf(0, LCD_HEIGHT-font_h, "star:%d speed:%d",
                           starfield.nb_stars, starfield.z_move);
        }
        rb->lcd_update();

        /*We get button from PLA this way */
        button = pluginlib_getaction(TIMEOUT_NOBLOCK, plugin_contexts,
                               ARRAYLEN(plugin_contexts));

        switch(button)
        {
            case (STARFIELD_INCREASE_ZMOVE):
            case (STARFIELD_INCREASE_ZMOVE_REPEAT):
                ++(starfield.z_move);
                pulse=false;
                t_disp=MSG_DISP_TIME;
                break;
            case (STARFIELD_DECREASE_ZMOVE):
            case (STARFIELD_DECREASE_ZMOVE_REPEAT):
                --(starfield.z_move);
                pulse=false;
                t_disp=MSG_DISP_TIME;
                break;
            case(STARFIELD_INCREASE_NB_STARS):
            case(STARFIELD_INCREASE_NB_STARS_REPEAT):
                starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP);
                t_disp=MSG_DISP_TIME;
                break;
            case(STARFIELD_DECREASE_NB_STARS):
            case(STARFIELD_DECREASE_NB_STARS_REPEAT):
                starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP);
                t_disp=MSG_DISP_TIME;
                break;
#ifdef HAVE_LCD_COLOR
            case(STARFIELD_TOGGLE_COLOR):
                starfield.color=!starfield.color;
                break;
#endif
            case(STARFIELD_QUIT):
            case(STARFIELD_QUIT2):
                return PLUGIN_OK;
                break;
            default:
                exit_on_usb(button);
                break;
        }
    }
}

/*************************** Plugin entry point ****************************/

enum plugin_status plugin_start(const void* parameter)
{
    int ret;

    (void)parameter;
    /* Turn off backlight timeout */
    backlight_ignore_timeout();

    ret = plugin_main();

    /* Turn on backlight timeout (revert to settings) */
    backlight_use_settings();

    return ret;
}