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179 lines
4.6 KiB

#include <stdint.h>
#include <assert.h>
#include "../compat/pgmspace.h"
#include "../random/prng.h"
#include "../util.h"
#include "../autoconf.h"
#include "../pixel.h"
#define PB(a) pgm_read_byte(&(a))
#define BITMAP_WIDTH 48
#define BITMAP_HEIGHT 48
#if NUM_COLS > BITMAP_WIDTH
#define VIEWPORT_WIDTH BITMAP_WIDTH
#else
#define VIEWPORT_WIDTH NUM_COLS
#endif
#if NUM_ROWS > BITMAP_HEIGHT
#define VIEWPORT_HEIGHT BITMAP_HEIGHT
#else
#define VIEWPORT_HEIGHT NUM_ROWS
#endif
#define XDOMAIN (BITMAP_WIDTH - VIEWPORT_WIDTH)
#define YDOMAIN (BITMAP_HEIGHT - VIEWPORT_HEIGHT)
#define CHUNKDOMAIN (BITMAP_WIDTH - 8)
#define CHUNKCOUNT (((VIEWPORT_WIDTH - 1) / 8) + 1)
#define FRAME_TICK 75
#define FRAMECOUNT 400
static uint8_t laborlogo_getChunk(const uint8_t x, const uint8_t y)
{
assert(x <= CHUNKDOMAIN);
assert(y < BITMAP_HEIGHT);
static const uint8_t nBitmap[48][6] PROGMEM =
{{0xFF, 0xFF, 0xE0, 0x07, 0xFF, 0xFF},
{0xFF, 0xFF, 0x00, 0xF8, 0xFF, 0xFF},
{0xFF, 0xF8, 0x00, 0xFF, 0x1F, 0xFF},
{0xFF, 0xF0, 0x00, 0xFF, 0xEF, 0xFF},
{0xFF, 0xC0, 0x00, 0xFF, 0xF3, 0xFF},
{0xFF, 0x80, 0x00, 0xFF, 0xFD, 0xFF},
{0xFF, 0x00, 0x00, 0xFF, 0xFE, 0xFF},
{0xFE, 0x00, 0x03, 0x3F, 0xFF, 0x7F},
{0xFC, 0x00, 0x04, 0xDF, 0xFF, 0xBF},
{0xF8, 0x00, 0x08, 0xEF, 0xFF, 0xDF},
{0xF0, 0x00, 0x10, 0xF7, 0xFF, 0xEF},
{0xF0, 0x00, 0x10, 0xF7, 0xFF, 0xEF},
{0xE0, 0xC0, 0x10, 0xF7, 0xFF, 0xF7},
{0xC0, 0xC0, 0x10, 0xF7, 0xFF, 0xFB},
{0xC0, 0x40, 0x08, 0xEF, 0xFF, 0xFB},
{0xC0, 0x40, 0x04, 0xDF, 0xFF, 0xFB},
{0x80, 0x40, 0x03, 0x3F, 0xFF, 0xFD},
{0x87, 0xFC, 0x00, 0xFF, 0xFF, 0xFD},
{0x84, 0x0C, 0x00, 0xFF, 0xFF, 0xFD},
{0x04, 0x00, 0x1F, 0x07, 0xFF, 0xFE},
{0x04, 0x00, 0x10, 0xF7, 0xFF, 0xFE},
{0x04, 0x00, 0x10, 0xF7, 0xFF, 0xFE},
{0xFF, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0x00, 0x80, 0x10, 0xF7, 0xFF, 0xFE},
{0xBF, 0xFC, 0x10, 0xF7, 0xFF, 0xFD},
{0xB0, 0x0C, 0x10, 0xF7, 0xFF, 0xFD},
{0x80, 0x00, 0x10, 0xF7, 0xFF, 0xFD},
{0xC0, 0x00, 0x10, 0xF7, 0xFF, 0xFB},
{0xC0, 0x00, 0x10, 0xF7, 0xFF, 0xFB},
{0xC0, 0x00, 0x10, 0xF7, 0xFF, 0xFB},
{0xE0, 0x00, 0x10, 0xF7, 0xFF, 0xF7},
{0xF0, 0x00, 0x10, 0xF7, 0xFF, 0xEF},
{0xF0, 0x00, 0x10, 0xF7, 0xFF, 0xEF},
{0xF8, 0x00, 0x10, 0xF7, 0xFF, 0xDF},
{0xFC, 0x00, 0x10, 0xF7, 0xFF, 0xBF},
{0xFE, 0x00, 0x1F, 0x07, 0xFF, 0x7F},
{0xFF, 0x00, 0x00, 0xFF, 0xFE, 0xFF},
{0xFF, 0x80, 0x00, 0xFF, 0xFD, 0xFF},
{0xFF, 0xC0, 0x00, 0xFF, 0xF3, 0xFF},
{0xFF, 0xF0, 0x00, 0xFF, 0xEF, 0xFF},
{0xFF, 0xF8, 0x00, 0xFF, 0x1F, 0xFF},
{0xFF, 0xFF, 0x00, 0xF8, 0xFF, 0xFF},
{0xFF, 0xFF, 0xE0, 0x07, 0xFF, 0xFF}};
uint8_t nChunk;
uint8_t nAlignment = x % 8;
if (nAlignment == 0)
{
nChunk = PB(nBitmap[y][x / 8]);
}
else
{
nChunk = PB(nBitmap[y][x / 8]) << nAlignment;
nChunk |= PB(nBitmap[y][x / 8 + 1]) >> (8 - nAlignment);
}
return nChunk;
}
static void laborlogo_drawViewport(const uint8_t nBitmapX,
const uint8_t nBitmapY)
{
assert(nBitmapX <= XDOMAIN);
assert(nBitmapY <= YDOMAIN);
for (int8_t y = 0; y < VIEWPORT_HEIGHT; ++y)
{
for (int8_t x = VIEWPORT_WIDTH; x > 0; x -= 8)
{
uint8_t nChunk;
if ((nBitmapX + x - 8) >= 0)
{
nChunk = laborlogo_getChunk(nBitmapX + x - 8, nBitmapY + y);
pixmap[2][y][CHUNKCOUNT - 1 - ((x - 1) / 8)] = nChunk;
}
else
{
nChunk = laborlogo_getChunk(nBitmapX, nBitmapY + y) >> (8 - x);
pixmap[2][y][CHUNKCOUNT - 1] = nChunk;
}
}
}
}
static void laborlogo_recalcVector(const int8_t x,
const int8_t y,
int8_t *const pdx,
int8_t *const pdy)
{
if (((x + *pdx) > (XDOMAIN)) || ((x + *pdx) < 0))
{
*pdx = random8() % 2 * (x < (XDOMAIN / 2) ? 1 : -1);
}
if (((y + *pdy) > (YDOMAIN)) || ((y + *pdy) < 0))
{
*pdy = random8() % 2 * (y < (YDOMAIN / 2) ? 1 : -1);
}
if (*pdx == 0 && *pdy == 0)
{
*pdx = (x < (XDOMAIN / 2) ? 1 : -1);
*pdy = (y < (YDOMAIN / 2) ? 1 : -1);
}
}
void laborlogo()
{
int8_t x = random8() % (XDOMAIN + 1);
int8_t y = random8() % (YDOMAIN + 1);
int8_t dx = 0;
int8_t dy = 0;
clear_screen(0);
for (uint16_t nCycles = FRAMECOUNT; nCycles > 0; --nCycles)
{
laborlogo_drawViewport(x, y);
laborlogo_recalcVector(x, y, &dx, &dy);
#if BITMAP_WIDTH > VIEWPORT_WIDTH
x += dx;
#endif
#if BITMAP_HEIGHT > VIEWPORT_HEIGHT
y += dy;
#endif
wait(FRAME_TICK);
}
}