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[sixel] first chunk of in-place restore_vec()

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nick black 2022-02-09 02:54:14 -05:00 committed by nick black
parent c3f1134d93
commit 6dd8498a3d
1 changed files with 58 additions and 7 deletions
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65
src/lib/sixel.c
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@ -542,7 +542,7 @@ wipe_color(sixelband* b, int color, int y, int startx, int endx,
return 0; // no work to be done here
}
int wiped = 0;
char* newvec = malloc(dimx);
char* newvec = malloc(dimx + 1);
if(newvec == NULL){
return -1;
}
@ -1622,10 +1622,61 @@ restore_vec(sixelband* b, int color, int yoff, int xoff, int dimx){
return -1;
}
}else{
// FIXME must update, walk vec, fun fun
int rle = 0; // the repetition number for this element
int x = 0;
int voff = 0;
if((v = malloc(dimx + 1)) == NULL){
return -1;
}
while(*vec){
if(isdigit(*vec)){
rle *= 10;
rle += (*vec - '0');
}else if(*vec == '!'){
rle = 0;
}else{
if(rle == 0){
rle = 1;
}
char rep = *vec;
//fprintf(stderr, "X/RLE/ENDX: %d %d %d\n", x, rle, endx);
if(x + rle < xoff){ // not wiped material; reproduce as-is
write_rle(v, &voff, rle, rep);
x += rle;
}else if(x > xoff){
write_rle(v, &voff, rle, rep);
x += rle;
}else{
if(x < xoff){
write_rle(v, &voff, xoff - x, rep);
rle -= xoff - x;
x = xoff;
}
write_rle(v, &voff, 1, ((rep - 63) | bit) + 63);
--rle;
++x;
break; // FIXME
if(rle){
write_rle(v, &voff, rle, rep);
x += rle;
}
}
rle = 0;
}
++vec;
/*
if(x > xoff){
fprintf(stderr, "COPYING IN %zu [%s] at %d ([%s])\n", strlen(vec), vec, voff, v);
fprintf(stderr, "LENVEC: %zu\n", strlen(v));
strcpy(v + voff, vec); // there is always room
break;
}
*/
}
}
free(b->vecs[color]);
b->vecs[color] = v;
//fprintf(stderr, "SET NEW VEC (%zu) [%s]\n", strlen(v), v);
return 0;
}
@ -1650,16 +1701,16 @@ restore_band(sixelmap* smap, int band, int startx, int endx,
const int height = ey - sy;
const int totalpixels = width * height;
sixelband* b = &smap->bands[band];
fprintf(stderr, "RESTORING band %d (%d->%d (%d->%d), %d->%d) %d pixels\n", band, sy, ey, starty, endy, startx, endx, totalpixels);
//fprintf(stderr, "RESTORING band %d (%d->%d (%d->%d), %d->%d) %d pixels\n", band, sy, ey, starty, endy, startx, endx, totalpixels);
int yoff = sy % cellpxy; // we start off on this row of the auxvec
int xoff = startx % cellpxx;
for(int dy = 0 ; sy + dy < ey ; ++dy, ++yoff){
const int idx = (yoff * cellpxx + xoff) * AUXVECELEMSIZE;
fprintf(stderr, " looking at line %d (auxvec row %d idx %d, dy %d)\n", sy + dy, yoff, idx, dy);
//fprintf(stderr, " looking at line %d (auxvec row %d idx %d, dy %d)\n", sy + dy, yoff, idx, dy);
for(int dx = 0 ; startx + dx < endx ; ++dx){
uint16_t color;
memcpy(&color, &auxvec[idx], AUXVECELEMSIZE);
fprintf(stderr, " idx %d (dx %d x %d): %hu\n", idx, dx, dx + startx, color);
//fprintf(stderr, " idx %d (dx %d x %d): %hu\n", idx, dx, dx + startx, color);
if(color != TRANS_PALETTE_ENTRY){
restore_vec(b, color, dy, startx + dx, dimx);
++restored;
@ -1675,7 +1726,7 @@ fprintf(stderr, " idx %d (dx %d x %d): %hu\n", idx, dx, dx + startx, color);
// just like wiping. this is necessary due to the complex nature of
// modifying a Sixel -- we want to do them all in one batch.
int sixel_rebuild(sprixel* s, int ycell, int xcell, uint8_t* auxvec){
fprintf(stderr, "REBUILDING %d/%d\n", ycell, xcell);
//fprintf(stderr, "REBUILDING %d/%d\n", ycell, xcell);
if(auxvec == NULL){
return -1;
}
@ -1699,7 +1750,7 @@ fprintf(stderr, "REBUILDING %d/%d\n", ycell, xcell);
// walk through each color, and wipe the necessary sixels from each band
int w = 0;
for(int b = startband ; b < endband ; ++b){
w += restore_band(smap, b, startx, endx, starty, endy, s->dimx,
w += restore_band(smap, b, startx, endx, starty, endy, s->pixx,
cellpxy, cellpxx, auxvec);
}
s->wipes_outstanding = true;