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initialize_ptests()

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nick black 2020-07-19 19:11:17 -04:00
parent 3aedec2501
commit 0ce429ef96
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GPG Key ID: 5F43400C21CBFACC
1 changed files with 22 additions and 1 deletions
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23
src/lib/render.c
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@ -1022,6 +1022,22 @@ int notcurses_render_to_file(struct notcurses* nc, FILE* fp){
return 0;
}
// We render left-to-right, top-to-bottom, one cell at a time. At any given
// cell, we only want to test intersecting planes. Each ptest tracks a plane
// and the cell at which it next needs be checked.
typedef struct ptest {
ncplane* n;
unsigned nextcell;
} ptest;
unsigned* initialize_ptests(const notcurses* nc){
const size_t puntlen = sizeof(uint64_t) * nc->stats.planes;
unsigned* punts = malloc(puntlen);
for(ncplane* p = nc->top ; p ; p = p->below){
}
return punts;
}
// We execute the painter's algorithm, starting from our topmost plane. The
// damagevector should be all zeros on input. On success, it will reflect
@ -1030,6 +1046,8 @@ int notcurses_render_to_file(struct notcurses* nc, FILE* fp){
// locking down the EGC, the attributes, and the channels for each cell.
static int
notcurses_render_internal(notcurses* nc, struct crender* rvec){
// the punts array is used to track when each plane needs to be tested.
unsigned* punts = initialize_ptests(nc);
int dimy, dimx;
ncplane_dim_yx(nc->stdplane, &dimy, &dimx);
cell* fb = malloc(sizeof(*fb) * dimy * dimx);
@ -1040,12 +1058,14 @@ notcurses_render_internal(notcurses* nc, struct crender* rvec){
nc->stdplane->leny, nc->stdplane->lenx,
nc->stdplane->absy, nc->stdplane->absx, nc->lfdimx)){
free(fb);
free(punts);
return -1;
}
p = p->below;
}
postpaint(fb, nc->lastframe, dimy, dimx, rvec, &nc->pool);
free(fb);
free(punts);
return 0;
}
@ -1059,9 +1079,10 @@ int notcurses_render(notcurses* nc){
const size_t crenderlen = sizeof(struct crender) * nc->stdplane->leny * nc->stdplane->lenx;
struct crender* crender = malloc(crenderlen);
memset(crender, 0, crenderlen);
if(notcurses_render_internal(nc, crender) == 0){
if(notcurses_render_internal(nc, crender, punts) == 0){
bytes = notcurses_rasterize(nc, crender, nc->rstate.mstreamfp);
}
free(punts);
free(crender);
clock_gettime(CLOCK_MONOTONIC, &done);
update_render_stats(&done, &start, &nc->stats, bytes);