d4bccf7f92
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7672 a1c6a512-1295-4272-9138-f99709370657
259 lines
7.3 KiB
C
259 lines
7.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* Copyright (C) 2005 Kévin Ferrare
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
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/******************************* Globals ***********************************/
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static struct plugin_api* rb; /* global api struct pointer */
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/* Key assignement */
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#define STARFIELD_QUIT BUTTON_OFF
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#define STARFIELD_INCREASE_ZMOVE BUTTON_UP
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#define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
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#define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
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#define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
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#define LCD_CENTER_X (LCD_WIDTH/2)
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#define LCD_CENTER_Y (LCD_HEIGHT/2)
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#define Z_MAX_DIST 100
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#define MAX_STARS (LCD_WIDTH*LCD_HEIGHT*20)/100
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#define INIT_STARS 600
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#define STARFIELD_INCREASE_STEP 100
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#define INIT_SPACE_SPEED 1
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#define STAR_MAX_VELOCITY 2
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/*
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* max 3d coord in the 2d screen :
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* example with x
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* x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...)
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* so
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* max_x2d=max_x3d/max_z+LCD_CENTER_X
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* max_x3d=(max_x2d-LCD_CENTER_X)*max_z
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* with
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* max_x2d = LCD_WIDTH
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* max_z = Z_MAX_DIST
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* we have now
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* max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST
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* max_x3d=LCD_CENTER_X*Z_MAX_DIST
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*/
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#define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST
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#define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST
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#define MSG_DISP_TIME 30
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static struct plugin_api* rb; /* global api struct pointer */
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/*
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* Each star's stuffs
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*/
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struct star
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{
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int x,y,z;
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int velocity;
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};
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static inline void star_init(struct star * star, int z_move)
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{
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star->velocity=rb->rand() % STAR_MAX_VELOCITY+1;
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/* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */
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star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X;
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star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y;
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if(z_move>=0)
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star->z=Z_MAX_DIST;
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else
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star->z=rb->rand() %Z_MAX_DIST/2+1;
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}
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static inline void star_move(struct star * star, int z_move)
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{
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star->z -= z_move*star->velocity;
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if (star->z <= 0 || star->z > Z_MAX_DIST)
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star_init(star, z_move);
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}
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static inline void star_draw(struct star * star, int z_move)
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{
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int x_draw, y_draw;
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/*
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* 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem)
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* we put the star in the center of the screen
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*/
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x_draw = star->x / star->z + LCD_CENTER_X;
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if (x_draw < 1 || x_draw >= LCD_WIDTH)
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{
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star_init(star, z_move);
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return;
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}
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y_draw = star->y / star->z + LCD_CENTER_Y;
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if (y_draw < 1 || y_draw >= LCD_HEIGHT)
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{
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star_init(star, z_move);
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return;
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}
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rb->lcd_drawpixel(x_draw, y_draw);
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if(star->z<5*Z_MAX_DIST/6)
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{
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rb->lcd_drawpixel(x_draw, y_draw - 1);
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rb->lcd_drawpixel(x_draw - 1, y_draw);
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if(star->z<Z_MAX_DIST/2)
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{
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rb->lcd_drawpixel(x_draw + 1, y_draw);
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rb->lcd_drawpixel(x_draw, y_draw + 1);
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}
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}
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}
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/*
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* Whole starfield operations
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*/
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struct starfield
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{
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struct star tab[MAX_STARS];
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int nb_stars;
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int z_move;
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};
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static inline void starfield_init(struct starfield * starfield)
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{
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starfield->nb_stars=0;
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starfield->z_move=INIT_SPACE_SPEED;
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}
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static inline void starfield_add_stars(struct starfield * starfield,
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int nb_to_add)
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{
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int i, old_nb_stars;
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old_nb_stars=starfield->nb_stars;
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starfield->nb_stars+=nb_to_add;
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if(starfield->nb_stars > MAX_STARS)
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starfield->nb_stars=MAX_STARS;
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for( i=old_nb_stars ; i < starfield->nb_stars ; ++i )
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{
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star_init( &(starfield->tab[i]), starfield->z_move );
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}
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}
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static inline void starfield_del_stars(struct starfield * starfield,
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int nb_to_add)
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{
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starfield->nb_stars-=nb_to_add;
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if(starfield->nb_stars<0)
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starfield->nb_stars=0;
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}
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static inline void starfield_move_and_draw(struct starfield * starfield)
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{
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int i;
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for(i=0;i<starfield->nb_stars;++i)
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{
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star_move(&(starfield->tab[i]), starfield->z_move);
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star_draw(&(starfield->tab[i]), starfield->z_move);
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}
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}
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static struct starfield starfield;
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int main(void)
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{
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char str_buffer[40];
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int button, t_disp=0;
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int font_h, font_w;
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rb->lcd_getstringsize("A", &font_w, &font_h);
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starfield_init(&starfield);
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starfield_add_stars(&starfield, INIT_STARS);
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while (true)
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{
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rb->sleep(1);
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rb->lcd_clear_display();
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starfield_move_and_draw(&starfield);
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if (t_disp > 0)
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{/* if a parameter is updated (by the user), we must print it */
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--t_disp;
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rb->snprintf(str_buffer, sizeof(str_buffer),
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"star:%d speed:%d",
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starfield.nb_stars,
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starfield.z_move);
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rb->lcd_putsxy(0, LCD_HEIGHT-font_h, str_buffer);
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}
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rb->lcd_update();
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button = rb->button_get(false);
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switch(button)
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{
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case (STARFIELD_INCREASE_ZMOVE):
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case (STARFIELD_INCREASE_ZMOVE | BUTTON_REPEAT):
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++(starfield.z_move);
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t_disp=MSG_DISP_TIME;
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break;
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case (STARFIELD_DECREASE_ZMOVE):
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case (STARFIELD_DECREASE_ZMOVE | BUTTON_REPEAT):
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--(starfield.z_move);
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t_disp=MSG_DISP_TIME;
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break;
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case(STARFIELD_INCREASE_NB_STARS):
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case(STARFIELD_INCREASE_NB_STARS | BUTTON_REPEAT):
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starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP);
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t_disp=MSG_DISP_TIME;
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break;
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case(STARFIELD_DECREASE_NB_STARS):
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case(STARFIELD_DECREASE_NB_STARS | BUTTON_REPEAT):
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starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP);
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t_disp=MSG_DISP_TIME;
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break;
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case(STARFIELD_QUIT):
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case(SYS_USB_CONNECTED):
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rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
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return PLUGIN_OK;
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break;
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}
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}
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}
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/*************************** Plugin entry point ****************************/
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enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
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{
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int ret;
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/*
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* this macro should be called as the first thing you do in the plugin.
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* it test that the api version and model the plugin was compiled for
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* matches the machine it is running on
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*/
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TEST_PLUGIN_API(api);
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rb = api; // copy to global api pointer
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(void)parameter;
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if (rb->global_settings->backlight_timeout > 0)
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rb->backlight_set_timeout(1);/* keep the light on */
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ret = main();
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return ret;
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}
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#endif // #ifdef HAVE_LCD_BITMAP
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