converted bitstuffing algorithms to native borg frame buffer format, saving 124 bytes
This commit is contained in:
Christian Kroll
parent
07c9d27b75
commit
12a8e94db4
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@ -23,11 +23,11 @@
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#define XSIZE UNUM_COLS
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#define YSIZE UNUM_ROWS
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// optimizing for 8 bit archs while retaining compatibility with dimensions >255
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// optimizing for 8 bit archs while retaining compatibility with dimensions >127
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#if UNUM_COLS < 128 && UNUM_ROWS < 128
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typedef uint8_t coord_t;
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typedef uint8_t coord_t;
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#else
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typedef unsigned int coord_t;
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typedef unsigned int coord_t;
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#endif
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/*
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@ -38,7 +38,7 @@ typedef unsigned int coord_t;
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#define YSIZE (UNUM_ROWS-1)
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#define DEBUG_ROW (UNUM_ROWS-1)
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#define DEBUG_BIT(pos, val) \
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setpixel((pixel){(pos)%XSIZE,DEBUG_ROW+(pos)/XSIZE},(val)?3:0)
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setpixel((pixel){(pos) % XSIZE,DEBUG_ROW + (pos) / XSIZE}, (val) ? 3 : 0)
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#define DEBUG_BYTE(s,v) \
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DEBUG_BIT((s)*8+0, (v)&(1<<0)); \
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DEBUG_BIT((s)*8+1, (v)&(1<<1)); \
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@ -59,17 +59,19 @@ typedef unsigned int coord_t;
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#define LOOP_DETECT_BUFFER_SIZE 8U
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#ifndef GOL_DELAY
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#define GOL_DELAY 1 /* milliseconds */
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#define GOL_DELAY 1 /* milliseconds */
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#endif
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#ifndef GOL_CYCLES
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#define GOL_CYCLES (2*60*3)
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#define GOL_CYCLES (2*60*3)
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#endif
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/******************************************************************************/
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/******************************************************************************/
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enum cell_e {dead=0, alive=1};
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enum cell_e {
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dead = 0, alive = 1
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};
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#ifdef NDEBUG
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typedef uint8_t cell_t;
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#else
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@ -81,60 +83,55 @@ enum cell_e {dead=0, alive=1};
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#define FIELD_XSIZE XSIZE
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#define FIELD_YSIZE YSIZE
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typedef cell_t field_t[FIELD_XSIZE][FIELD_YSIZE];
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typedef cell_t field_t[FIELD_YSIZE][FIELD_XSIZE];
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/******************************************************************************/
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void setcell(field_t pf, coord_t x, coord_t y, cell_t value){
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pf[(x+FIELD_XSIZE)%FIELD_XSIZE][(y+FIELD_YSIZE)%FIELD_YSIZE] = value;
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void setcell(field_t pf, coord_t x, coord_t y, cell_t value) {
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pf[(y+FIELD_YSIZE) % FIELD_YSIZE][(x+FIELD_XSIZE) % FIELD_XSIZE] = value;
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}
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/******************************************************************************/
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cell_t getcell(field_t pf, coord_t x, coord_t y){
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return pf[(x+FIELD_XSIZE)%FIELD_XSIZE][(y+FIELD_YSIZE)%FIELD_YSIZE];
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cell_t getcell(field_t pf, coord_t x, coord_t y) {
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return pf[(y+FIELD_YSIZE) % FIELD_YSIZE][(x+FIELD_XSIZE) % FIELD_XSIZE];
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}
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#else /* BITSTUFFED */
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#define FIELD_XSIZE ((XSIZE+7)/8)
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#define FIELD_XSIZE LINEBYTES
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#define FIELD_YSIZE YSIZE
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typedef uint8_t field_t[FIELD_XSIZE][FIELD_YSIZE];
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typedef uint8_t field_t[FIELD_YSIZE][FIELD_XSIZE];
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/******************************************************************************/
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void setcell(field_t pf, coord_t x, coord_t y, cell_t value){
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uint8_t t;
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t = pf[x/8][y];
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if(value==alive){
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t |= 1<<(x&7);
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void setcell(field_t pf, coord_t x, coord_t y, cell_t value) {
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if (value != dead) {
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pf[y][x / 8] |= shl_table[x & 7];
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} else {
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t &= ~(1<<(x&7));
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pf[y][x / 8] &= ~shl_table[x & 7];
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}
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pf[x/8][y] = t;
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}
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/******************************************************************************/
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static cell_t getcell(field_t pf, coord_t x, coord_t y){
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return ((pf[x/8][y])&(1<<(x&7)))?alive:dead;
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static cell_t getcell(field_t pf, coord_t x, coord_t y) {
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return ((pf[y][x / 8]) & (shl_table[x & 7])) ? alive : dead;
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}
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#endif
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/******************************************************************************/
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uint8_t countsurroundingalive(field_t pf, coord_t x, coord_t y){
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uint8_t countsurroundingalive(field_t pf, coord_t x, coord_t y) {
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static int8_t const offset[] = {-1, -1, 0, +1, +1, +1, 0, -1, -1, -1};
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x += XSIZE;
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y += YSIZE;
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uint8_t i, ret=0;
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for (i = 8; i--;)
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{
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uint8_t i, ret = 0;
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for (i = 8; i--;) {
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// getcell(...) returns either 0 or 1
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ret += getcell(pf,(x+offset[i+2])%XSIZE, (y+offset[i])%YSIZE);
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ret += getcell(pf, (x + offset[i+2]) % XSIZE, (y + offset[i]) % YSIZE);
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}
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return ret;
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@ -142,28 +139,28 @@ uint8_t countsurroundingalive(field_t pf, coord_t x, coord_t y){
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/******************************************************************************/
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void nextiteration(field_t dest, field_t src){
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coord_t x,y;
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void nextiteration(field_t dest, field_t src) {
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coord_t x, y;
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uint8_t tc;
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for(y=0; y<YSIZE; ++y){
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for(x=0; x<XSIZE; ++x){
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tc=countsurroundingalive(src,x,y);
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switch(tc){
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// case 0:
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// case 1:
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// /* dead */
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// setcell(dest, x,y, dead);
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for (y = YSIZE; y--;) {
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for (x = XSIZE; x--;) {
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tc = countsurroundingalive(src, x, y);
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switch (tc) {
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// case 0:
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// case 1:
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// /* dead */
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// setcell(dest, x,y, dead);
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case 2:
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/* keep */
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setcell(dest, x,y, getcell(src,x,y));
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setcell(dest, x, y, getcell(src, x, y));
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break;
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case 3:
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/* alive */
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setcell(dest, x,y, alive);
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setcell(dest, x, y, alive);
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break;
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default:
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/* dead */
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setcell(dest, x,y, dead);
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setcell(dest, x, y, dead);
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break;
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}
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}
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@ -172,82 +169,66 @@ void nextiteration(field_t dest, field_t src){
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/******************************************************************************/
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void printpf(field_t pf){
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#ifdef BITSTUFFED
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static void pfprint(field_t pf) {
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memcpy(pixmap[NUMPLANE - 1], pf, sizeof(field_t));
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}
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#else
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void pfprint(field_t pf) {
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coord_t x,y;
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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for(y=YSIZE; y--;) {
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for(x=XSIZE; x--;) {
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setpixel((pixel){x,y},getcell(pf,x,y)*3);
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}
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}
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}
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#endif
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/******************************************************************************/
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void pfcopy(field_t dest, field_t src){
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coord_t x,y;
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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setcell(dest,x,y,getcell(src,x,y));
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}
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}
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static void pfcopy(field_t dest, field_t src) {
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memcpy(dest, src, sizeof(field_t));
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}
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/******************************************************************************/
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static int pfcmp(field_t dest, field_t src) {
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return memcmp(dest, src, sizeof(field_t));
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}
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#ifndef BITSTUFFED
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uint8_t pfcmp(field_t dest, field_t src){
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coord_t x,y;
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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if (getcell(src,x,y) != getcell(dest,x,y))
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return 1;
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}
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}
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return 0;
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}
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/******************************************************************************/
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uint8_t pfempty(field_t src){
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uint8_t pfempty(field_t src) {
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coord_t x,y;
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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if (getcell(src,x,y)==alive)
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for(y=YSIZE; y--;) {
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for(x=XSIZE; x--;) {
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if (getcell(src, x, y)==alive)
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return 0;
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}
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}
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return 1;
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}
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#else
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uint8_t pfcmp(field_t dest, field_t src){
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coord_t x,y;
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for(y=0; y<FIELD_YSIZE; ++y){
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for(x=0; x<FIELD_XSIZE; ++x){
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if (src[x][y] != dest[x][y])
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return 1;
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}
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}
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return 0;
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}
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/******************************************************************************/
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uint8_t pfempty(field_t src){
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coord_t x,y;
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for(y=0; y<FIELD_YSIZE; ++y){
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for(x=0; x<FIELD_XSIZE; ++x){
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if (src[x][y]!=0)
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uint8_t pfempty(field_t src) {
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coord_t x, y;
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for (y = 0; y < FIELD_YSIZE; ++y) {
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for (x = 0; x < FIELD_XSIZE; ++x) {
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if (src[y][x] != 0)
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return 0;
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}
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}
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return 1;
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}
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#endif
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/******************************************************************************/
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void insertglider(field_t pf){
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void insertglider(field_t pf) {
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/*
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* #
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* #
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@ -255,68 +236,78 @@ void insertglider(field_t pf){
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*/
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setcell(pf, 1, 0, alive);
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setcell(pf, 2, 1, alive);
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setcell(pf, 0, 2, alive); setcell(pf, 1, 2, alive); setcell(pf, 2, 2, alive);
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setcell(pf, 0, 2, alive);setcell(pf, 1, 2, alive);setcell(pf, 2, 2, alive);
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}
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/******************************************************************************/
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int gameoflife(){
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static void pfinit(field_t pf)
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{
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coord_t x, y;
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#ifndef BITSTUFFED
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for (y = YSIZE; y--;) {
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for (x = XSIZE; x--;) {
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setcell(pf, x, y, (random8() & 1) ? alive : dead);
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}
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}
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#else
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for (y = 0; y < FIELD_YSIZE; ++y) {
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for (x = 0; x < FIELD_XSIZE; ++x) {
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pf[y][x] = random8();
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}
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}
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#endif
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}
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/******************************************************************************/
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void gameoflife() {
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DEBUG_BYTE(0,0); // set debug bytes to zero
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DEBUG_BYTE(1,0);
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field_t pf1,pf2;
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field_t ldbuf[LOOP_DETECT_BUFFER_SIZE]={{{0}}}; // loop detect buffer
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uint8_t ldbuf_idx=0;
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coord_t x,y;
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field_t pf1, pf2;
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field_t ldbuf[LOOP_DETECT_BUFFER_SIZE] = {{{0}}}; // loop detect buffer
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uint8_t ldbuf_idx = 0;
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uint16_t cycle;
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//start:
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/* initalise the field with random */
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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setcell(pf1,x,y,(random8()&1)?alive:dead);
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}
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}
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/* initialize the field with random */
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pfinit(pf1);
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#ifdef GLIDER_TEST
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/* initialise with glider */
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for(y=YSIZE; y--;){
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for(x=XSIZE; x--;){
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setcell(pf1,x,y,dead);
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/* initialize with glider */
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for(y=YSIZE; y--;) {
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for(x=XSIZE; x--;) {
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setcell(pf1, x, y, dead);
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}
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}
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insertglider(pf1);
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#endif
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/* the main part */
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printpf(pf1);
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for(cycle=1; cycle<GOL_CYCLES; ++cycle){
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DEBUG_BYTE(0,(uint8_t)(GOL_CYCLES-cycle)&0xff);
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DEBUG_BYTE(1, SREG);
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pfprint(pf1);
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for (cycle = 1; cycle < GOL_CYCLES; ++cycle) {
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DEBUG_BYTE(0, (uint8_t)(GOL_CYCLES-cycle) & 0xff); DEBUG_BYTE(1, SREG);
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wait(GOL_DELAY);
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pfcopy(pf2,pf1);
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nextiteration(pf1,pf2);
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printpf(pf1);
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pfcopy(pf2, pf1);
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nextiteration(pf1, pf2);
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pfprint(pf1);
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/* loop detection */
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if(!pfcmp(pf1, pf2)){
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if (!pfcmp(pf1, pf2)) {
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insertglider(pf1);
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cycle=1;
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cycle = 1;
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}
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if(pfempty(pf1)){
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if (pfempty(pf1)) {
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/* kill game */
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return 0;
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return;
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}
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/* */
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uint8_t i;
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for(i=0; i<LOOP_DETECT_BUFFER_SIZE; ++i){
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if(!pfcmp(pf1, ldbuf[i])){
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for (i = 0; i < LOOP_DETECT_BUFFER_SIZE; ++i) {
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if (!pfcmp(pf1, ldbuf[i])) {
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insertglider(pf1);
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cycle=1;
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cycle = 1;
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}
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}
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pfcopy(ldbuf[ldbuf_idx], pf1);
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ldbuf_idx = (ldbuf_idx+1)%LOOP_DETECT_BUFFER_SIZE;
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ldbuf_idx = (ldbuf_idx + 1) % LOOP_DETECT_BUFFER_SIZE;
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}
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return 0;
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}
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