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make hires_trans_check() generic across cellheights

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nick black 2024-12-27 01:45:08 -05:00 committed by nick black
parent 22f99c650f
commit b4dd7f1a7c
1 changed files with 28 additions and 22 deletions
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50
src/lib/blit.c
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@ -598,27 +598,30 @@ sex_solver(const uint32_t rgbas[6], uint64_t* channels, unsigned blendcolors,
return sex[best];
}
// bit is *set* where sextant *is not*
// 32: bottom right 16: bottom left
// 8: middle right 4: middle left
// 2: upper right 1: upper left
static const char* sextrans[64] = {
"█", "🬻", "🬺", "🬹", "🬸", "🬷", "🬶", "🬵",
"🬴", "🬳", "🬲", "🬱", "🬰", "🬯", "🬮", "🬭",
"🬬", "🬫", "🬪", "🬩", "🬨", "▐", "🬧", "🬦",
"🬥", "🬤", "🬣", "🬢", "🬡", "🬠", "🬟", "🬞",
"🬝", "🬜", "🬛", "🬚", "🬙", "🬘", "🬗", "🬖",
"🬕", "🬔", "▌", "🬓", "🬒", "🬑", "🬐", "🬏",
"🬎", "🬍", "🬌", "🬋", "🬊", "🬉", "🬈", "🬇",
"🬆", "🬅", "🬄", "🬃", "🬂", "🬁", "🬀", " ",
};
static const char*
sex_trans_check(nccell* c, const uint32_t rgbas[6], unsigned blendcolors,
uint32_t transcolor, unsigned nointerpolate){
// bit is *set* where sextant *is not*
// 32: bottom right 16: bottom left
// 8: middle right 4: middle left
// 2: upper right 1: upper left
static const char* sex[64] = {
"█", "🬻", "🬺", "🬹", "🬸", "🬷", "🬶", "🬵",
"🬴", "🬳", "🬲", "🬱", "🬰", "🬯", "🬮", "🬭",
"🬬", "🬫", "🬪", "🬩", "🬨", "▐", "🬧", "🬦",
"🬥", "🬤", "🬣", "🬢", "🬡", "🬠", "🬟", "🬞",
"🬝", "🬜", "🬛", "🬚", "🬙", "🬘", "🬗", "🬖",
"🬕", "🬔", "▌", "🬓", "🬒", "🬑", "🬐", "🬏",
"🬎", "🬍", "🬌", "🬋", "🬊", "🬉", "🬈", "🬇",
"🬆", "🬅", "🬄", "🬃", "🬂", "🬁", "🬀", " ",
};
hires_trans_check(nccell* c, const uint32_t* rgbas, unsigned blendcolors,
uint32_t transcolor, unsigned nointerpolate, int cellheight,
const char** transegcs){
unsigned transstring = 0;
unsigned r = 0, g = 0, b = 0;
unsigned div = 0;
for(unsigned mask = 0 ; mask < 6 ; ++mask){
// check each pixel for transparency
for(int mask = 0 ; mask < cellheight * 2 ; ++mask){
if(rgba_trans_p(rgbas[mask], transcolor)){
transstring |= (1u << mask);
}else if(!nointerpolate || !div){
@ -628,13 +631,14 @@ sex_trans_check(nccell* c, const uint32_t rgbas[6], unsigned blendcolors,
++div;
}
}
// transstring can only have 0x80 and/or 0x40 set if cellheight was 4
if(transstring == 0){ // there was no transparency
return NULL;
}
nccell_set_bg_alpha(c, NCALPHA_TRANSPARENT);
// there were some transparent pixels. since they get priority, the foreground
// is just a general lerp across non-transparent pixels.
const char* egc = sex[transstring];
const char* egc = transegcs[transstring];
nccell_set_bg_alpha(c, NCALPHA_TRANSPARENT);
//fprintf(stderr, "transtring: %u egc: %s\n", transtring, egc);
if(*egc == ' '){ // entirely transparent
@ -664,7 +668,7 @@ hires_blit(ncplane* nc, int linesize, const void* data, int leny, int lenx,
unsigned dimy, dimx, x, y;
int total = 0; // number of cells written
ncplane_dim_yx(nc, &dimy, &dimx);
//fprintf(stderr, "sexblitter %dx%d -> %d/%d+%d/%d\n", leny, lenx, dimy, dimx, bargs->u.cell.placey, bargs->u.cell.placex);
//fprintf(stderr, "hiresblitter %dx%d -> %d/%d+%d/%d\n", leny, lenx, dimy, dimx, bargs->u.cell.placey, bargs->u.cell.placex);
const unsigned char* dat = data;
int visy = bargs->begy;
for(y = bargs->u.cell.placey ; visy < (bargs->begy + leny) && y < dimy ; ++y, visy += cellheight){
@ -694,13 +698,15 @@ hires_blit(ncplane* nc, int linesize, const void* data, int leny, int lenx,
nccell* c = ncplane_cell_ref_yx(nc, y, x);
c->channels = 0;
c->stylemask = 0;
// FIXME need genericize
const char* egc = sex_trans_check(c, rgbas, blendcolors, bargs->transcolor, nointerpolate);
// FIXME need genericize (need octtrans for last param, etc)
const char* egc = hires_trans_check(c, rgbas, blendcolors, bargs->transcolor,
nointerpolate, cellheight, sextrans);
if(egc == NULL){ // no transparency; run a full solver
// FIXME need genericize to hires
egc = sex_solver(rgbas, &c->channels, blendcolors, nointerpolate);
cell_set_blitquadrants(c, 1, 1, 1, 1);
}
//fprintf(stderr, "sex EGC: %s channels: %016lx\n", egc, c->channels);
//fprintf(stderr, "hires EGC: %s channels: %016lx\n", egc, c->channels);
if(*egc){
if(pool_blit_direct(&nc->pool, c, egc, strlen(egc), 1) <= 0){
return -1;