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[kitty] first go at kitty_rebuild() #1440

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nick black 2021-04-26 01:22:39 -04:00 committed by Nick Black
parent 5eafafa652
commit f0910ab398
1 changed files with 33 additions and 26 deletions
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59
src/lib/kitty.c
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@ -201,9 +201,8 @@ kitty_null(char* triplet, int skip, int max, int pleft, uint8_t* auxvec){
// and restore a maximum of |max| pixels after that. returns the number of
// pixels restored. |max| must be positive. |skip| must be non-negative, and
// less than 3. |pleft| is the number of pixels available in the chunk.
// FIXME needs auxvec
static inline int
kitty_restore(char* triplet, int skip, int max, int pleft){
kitty_restore(char* triplet, int skip, int max, int pleft, const uint8_t* auxvec){
//fprintf(stderr, "SKIP/MAX/PLEFT %d/%d/%d\n", skip, max, pleft);
if(pleft > 3){
pleft = 3;
@ -211,31 +210,33 @@ kitty_restore(char* triplet, int skip, int max, int pleft){
if(max + skip > pleft){
max = pleft - skip;
}
//fprintf(stderr, "alpha-nulling %d after %d\n", max, skip);
if(skip == 0){
if(max == 1){
memset(triplet, b64subs[0], 5);
triplet[5] = b64subs[b64idx(triplet[5]) & 0xf];
}else if(max == 2){
memset(triplet, b64subs[0], 10);
triplet[10] = b64subs[b64idx(triplet[10]) & 0x3];
}else{ // max == 3
memset(triplet, b64subs[0], 16);
int a = auxvec[0];
triplet[0x4] = b64subs[(a & 0xfc) >> 2];
triplet[0x5] = b64subs[((a & 0x3) << 4) | (b64idx(triplet[0x5]) & 0xf)];
if(max > 1){
a = auxvec[1];
triplet[0x9] = b64subs[(b64idx(triplet[0x9]) & 0x30) | ((a & 0xf0) >> 4)];
triplet[0xA] = b64subs[((a & 0xf) << 2) | (b64idx(triplet[0xA]) & 0xf)];
}
if(max == 3){
a = auxvec[2];
triplet[0xE] = b64subs[((a & 0xc0) >> 6) | (b64idx(triplet[0xE]) & 0x3c)];
triplet[0xF] = b64subs[(a & 0x3f)];
}
}else if(skip == 1){
if(max == 1){
triplet[5] = b64subs[b64idx(triplet[5]) & 0x30];
memset(triplet + 6, b64subs[0], 4);
triplet[10] = b64subs[b64idx(triplet[10]) & 0x3];
}else{
triplet[5] = b64subs[b64idx(triplet[5]) & 0x30];
memset(triplet + 6, b64subs[0], 10);
int a = auxvec[0];
triplet[0x9] = b64subs[(b64idx(triplet[0x9]) & 0x30) | ((a & 0xf0) >> 4)];
triplet[0xA] = b64subs[((a & 0xf) << 2) | (b64idx(triplet[0xA]) & 0xf)];
if(max == 2){
a = auxvec[1];
triplet[0xE] = b64subs[((a & 0xc0) >> 6) | (b64idx(triplet[0xE]) & 0x3c)];
triplet[0xF] = b64subs[(a & 0x3f)];
}
}else{ // skip == 2
if(max == 1){
triplet[10] = b64subs[b64idx(triplet[10]) & 0xf];
memset(triplet + 11, b64subs[0], 5);
}
int a = auxvec[0];
triplet[0xE] = b64subs[((a & 0xc0) >> 6) | (b64idx(triplet[0xE]) & 0x3c)];
triplet[0xF] = b64subs[(a & 0x3f)];
}
return max;
}
@ -263,7 +264,10 @@ int kitty_rebuild(sprixel* s, int ycell, int xcell){
int nextpixel = (s->pixx * ycell * ypixels) + (xpixels * xcell);
int thisrow = targx;
int chunkedhandled = 0;
uint8_t* auxvec = s->n->tam[s->dimx * ycell + xcell].auxvector;
sprixcell_e state = SPRIXCELL_OPAQUE_KITTY;
const int chunks = totalpixels / RGBA_MAXLEN + !!(totalpixels % RGBA_MAXLEN);
int auxvecidx = 0;
while(targy && chunkedhandled < chunks){ // need to null out |targy| rows of |targx| pixels, track with |thisrow|
int inchunk = totalpixels - chunkedhandled * RGBA_MAXLEN;
if(inchunk > RGBA_MAXLEN){
@ -284,13 +288,19 @@ int kitty_rebuild(sprixel* s, int ycell, int xcell){
// the maximum number of pixels we can convert is the minimum of the
// pixels remaining in the target row, and the pixels left in the chunk.
//fprintf(stderr, "inchunk: %d total: %d triples: %d\n", inchunk, totalpixels, triples);
int chomped = kitty_restore(c + tripbytes, tripskip, thisrow, inchunk - triples * 3);
int chomped = kitty_restore(c + tripbytes, tripskip, thisrow,
inchunk - triples * 3, auxvec + auxvecidx);
assert(chomped >= 0);
auxvecidx += chomped;
thisrow -= chomped;
//fprintf(stderr, "POSTCHIMP CHOMP: %d pixoffset: %d next: %d tripbytes: %d tripskip: %d thisrow: %d\n", chomped, pixoffset, nextpixel, tripbytes, tripskip, thisrow);
if(thisrow == 0){
//fprintf(stderr, "CLEARED ROW, TARGY: %d\n", targy - 1);
if(--targy == 0){
free(auxvec);
// FIXME needs be MIXED_KITTY if we got transparent pixels
s->n->tam[s->dimx * ycell + xcell].state = state;
s->n->tam[s->dimx * ycell + xcell].auxvector = NULL;
return 0;
}
thisrow = targx;
@ -341,7 +351,6 @@ int kitty_wipe(const notcurses* nc, sprixel* s, int ycell, int xcell){
int thisrow = targx;
int chunkedhandled = 0;
const int chunks = totalpixels / RGBA_MAXLEN + !!(totalpixels % RGBA_MAXLEN);
sprixcell_e state = SPRIXCELL_OPAQUE_KITTY;
int auxvecidx = 0;
while(targy && chunkedhandled < chunks){ // need to null out |targy| rows of |targx| pixels, track with |thisrow|
//fprintf(stderr, "PLUCKING FROM [%s]\n", c);
@ -374,8 +383,6 @@ int kitty_wipe(const notcurses* nc, sprixel* s, int ycell, int xcell){
if(thisrow == 0){
//fprintf(stderr, "CLEARED ROW, TARGY: %d\n", targy - 1);
if(--targy == 0){
// FIXME make sure state is MIXED if we had any transparency
s->n->tam[s->dimx * ycell + xcell].state = state;
s->n->tam[s->dimx * ycell + xcell].auxvector = auxvec;
return 0;
}