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corrected a PROGMEM related bug

This commit is contained in:
Christian Kroll 2010-04-16 17:06:09 +00:00
parent 1a74745b8c
commit 67f36c9f80
1 changed files with 30 additions and 21 deletions
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51
animations/laborlogo.c
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@ -6,14 +6,19 @@
#include "../autoconf.h"
#include "../pixel.h"
#define PRB(a) pgm_read_byte(&(a))
#define BITMAP_WIDTH 48
#define BITMAP_HEIGHT 48
#define VIEWPORT_WIDTH 16
#define VIEWPORT_HEIGHT 16
#define XDOMAIN (BITMAP_WIDTH - VIEWPORT_WIDTH)
#define YDOMAIN (BITMAP_HEIGHT - VIEWPORT_HEIGHT)
#define FRAME_TICK 75
#define FRAMECOUNT 400
static uint16_t laborlogo_getLine(uint8_t x, uint8_t y)
static uint16_t laborlogo_getLine(const uint8_t x,
const uint8_t y)
{
assert(x <= BITMAP_WIDTH - VIEWPORT_WIDTH);
assert(y < BITMAP_HEIGHT);
@ -73,23 +78,25 @@ static uint16_t laborlogo_getLine(uint8_t x, uint8_t y)
if (nAlignment == 0)
{
nLine = nBitmap[y][x / 8] << 8 | (nBitmap[y][x / 8 + 1]);
nLine = PRB(nBitmap[y][x / 8]) << 8;
nLine |= PRB((nBitmap[y][x / 8 + 1]));
}
else
{
nLine = pgm_read_byte(&nBitmap[y][x / 8]) << (8 + nAlignment);
nLine |= pgm_read_byte(&nBitmap[y][x / 8 + 1]) << nAlignment;
nLine |= pgm_read_byte(&nBitmap[y][x / 8 + 2]) >> (8 - nAlignment);
nLine = PRB(nBitmap[y][x / 8]) << (8 + nAlignment);
nLine |= PRB(nBitmap[y][x / 8 + 1]) << nAlignment;
nLine |= PRB(nBitmap[y][x / 8 + 2]) >> (8 - nAlignment);
}
return nLine;
}
void laborlogo_drawViewport(uint8_t nBitmapX, uint8_t nBitmapY)
static void laborlogo_drawViewport(const uint8_t nBitmapX,
const uint8_t nBitmapY)
{
assert(nBitmapX <= 32);
assert(nBitmapY <= 32);
assert(nBitmapX <= XDOMAIN);
assert(nBitmapY <= YDOMAIN);
for (uint8_t nVPortY = 0; nVPortY < 16; ++nVPortY)
{
@ -108,29 +115,29 @@ void laborlogo_drawViewport(uint8_t nBitmapX, uint8_t nBitmapY)
}
}
void laborlogo_recalcVectors(int8_t *px, int8_t *py, int8_t *pdx, int8_t *pdy)
static void laborlogo_recalcVectors(const int8_t x,
const int8_t y,
int8_t *const pdx,
int8_t *const pdy)
{
if (((*px + *pdx) > (XDOMAIN)) || ((*px + *pdx) < 0))
if (((x + *pdx) > (XDOMAIN)) || ((x + *pdx) < 0))
{
*pdx = random8() % 2 * (*px < (XDOMAIN / 2) ? 1 : -1);
*pdx = random8() % 2 * (x < (XDOMAIN / 2) ? 1 : -1);
}
if (((*py + *pdy) > (YDOMAIN)) || ((*py + *pdy) < 0))
if (((y + *pdy) > (YDOMAIN)) || ((y + *pdy) < 0))
{
*pdy = random8() % 2 * (*py < (YDOMAIN / 2) ? 1 : -1);
*pdy = random8() % 2 * (y < (YDOMAIN / 2) ? 1 : -1);
}
if (*pdx == 0 && *pdy == 0)
{
*pdx = (*px < (XDOMAIN / 2) ? 1 : -1);
*pdy = (*py < (YDOMAIN / 2) ? 1 : -1);
*pdx = (x < (XDOMAIN / 2) ? 1 : -1);
*pdy = (y < (YDOMAIN / 2) ? 1 : -1);
}
*px += *pdx;
*py += *pdy;
// printf("%d, %d\n", *px , *py);
}
void laborlogo()
{
uint16_t nCycles = 500;
uint16_t nCycles = FRAMECOUNT;
int8_t x = random8() % (XDOMAIN + 1);
int8_t y = random8() % (YDOMAIN + 1);
int8_t dx = 0;
@ -139,7 +146,9 @@ void laborlogo()
while (nCycles-- != 0)
{
laborlogo_drawViewport(x ,y);
wait(75);
laborlogo_recalcVectors(&x, &y, &dx, &dy);
laborlogo_recalcVectors(x, y, &dx, &dy);
x += dx;
y += dy;
wait(FRAME_TICK);
}
}