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760 user890104 1 
//
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//
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//    Copyright 2011 user890104
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//
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//
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//    This file is part of emCORE.
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//
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//    emCORE is free software: you can redistribute it and/or
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//    modify it under the terms of the GNU General Public License as
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//    published by the Free Software Foundation, either version 2 of the
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//    License, or (at your option) any later version.
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//
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//    emCORE is distributed in the hope that it will be useful,
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//    but WITHOUT ANY WARRANTY; without even the implied warranty of
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//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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//    See the GNU General Public License for more details.
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//
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//    You should have received a copy of the GNU General Public License along
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//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.
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//
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//
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#include "emcoreapp.h"
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#define BALL_W 5
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#define BALL_H 5
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// 24-bit FB (rgb888)
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#define DBPP 3
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static void main()
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{
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    unsigned int run_cycles = 5000,
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    dw = lcd_get_width(),
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    dh = lcd_get_height();
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    unsigned int fb_size = DBPP * dw * dh;
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    void* fb = malloc(fb_size);
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    if (fb == NULL)
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    {
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        panic(PANIC_KILLTHREAD, "Unable to allocate framebuffer!");
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    }
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    unsigned int i, x = 0, y = 0,
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    old_x, old_y, bx, by,
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    size = BALL_W * BALL_H;
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    unsigned char shape[BALL_H][BALL_W][DBPP];
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    int vx = 1, vy = 1;
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    // generate our shape
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    memset(&shape, 0xff, sizeof(shape));
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    // skip the first and the last pixel
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    // then skip the ones in top-right and bottom-left
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    // to create a rounded square
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    for (i = 1; i < size - 1; ++i)
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    {
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        if (i == BALL_W - 1 || i == size - BALL_W) continue;
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        memset(((void *)&shape) + i * DBPP, 0, DBPP);
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    }
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    //filllcd(0, 0, dw, dh, 0xffffff); // broken on Nano 4G?
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    memset(fb, 0xff, fb_size);
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    displaylcd(0, 0, dw, dh, fb, 0, 0, dw);
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    while (run_cycles > 0)
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    {
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        memset(fb, 0xff, fb_size);
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        // check if we hit a wall
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        if ((x >= dw - BALL_W && vx > 0) || (x == 0 && vx < 0))
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        {
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            vx = -vx;
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        }
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        if ((y >= dh - BALL_H && vy > 0) || (y == 0 && vy < 1))
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        {
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            vy = -vy;
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        }
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        // store old x and y
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        // needed for redrawing later
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        old_x = x; old_y = y;
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        x += vx; y += vy;
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        // copy the shape to the framebuffer
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        for (i = 0; i < BALL_H; ++i)
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        {
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            memcpy(fb + x * DBPP + (y + i) * dw * DBPP, &shape[i], sizeof(shape[i]));
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        }
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        // offset to redraw from
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        bx = vx > 0 ? old_x : x;
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        by = vy > 0 ? old_y : y;
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        displaylcd(bx, by, BALL_W + ABS(vx), BALL_H + ABS(vy), fb, bx, by, dw);
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        sleep(1000);
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        --run_cycles;
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    }
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    free(fb);
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    cputs(3, "Application terminated\n");
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}
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EMCORE_APP_HEADER("Ball", main, 127)