fix: make popup rendering deterministic
This commit is contained in:
135
font.c
135
font.c
@@ -4,97 +4,118 @@
|
||||
#include "fn.h"
|
||||
|
||||
typedef struct Glyph Glyph;
|
||||
typedef struct Font Font;
|
||||
struct Glyph
|
||||
{
|
||||
uchar *bmp;
|
||||
int w, h, ox, oy;
|
||||
int w, h, ox, oy, base;
|
||||
};
|
||||
|
||||
struct Font
|
||||
{
|
||||
stbtt_fontinfo info;
|
||||
uchar *data;
|
||||
float scale;
|
||||
int base;
|
||||
};
|
||||
|
||||
enum { Maxfonts = 4 };
|
||||
|
||||
static stbtt_fontinfo fonts[Maxfonts];
|
||||
static uchar *fontdata[Maxfonts];
|
||||
static float scale[Maxfonts];
|
||||
static Font fonts[Maxfonts];
|
||||
static int nfonts;
|
||||
static Glyph cache[Nglyphs];
|
||||
static u32int blendtab[2][256];
|
||||
|
||||
static u32int
|
||||
blend(u32int bg, int a)
|
||||
blend(u32int bg, u32int fg, int a)
|
||||
{
|
||||
int r, g, b, inv;
|
||||
|
||||
inv = 255 - a;
|
||||
r = (bg >> 16 & 0xff) * inv / 255;
|
||||
g = (bg >> 8 & 0xff) * inv / 255;
|
||||
b = (bg & 0xff) * inv / 255;
|
||||
r = ((bg >> 16 & 0xff) * inv + (fg >> 16 & 0xff) * a) / 255;
|
||||
g = ((bg >> 8 & 0xff) * inv + (fg >> 8 & 0xff) * a) / 255;
|
||||
b = ((bg & 0xff) * inv + (fg & 0xff) * a) / 255;
|
||||
return (r << 16) | (g << 8) | b;
|
||||
}
|
||||
|
||||
static void
|
||||
static int
|
||||
loadfont(char *path)
|
||||
{
|
||||
int fd;
|
||||
Font *f;
|
||||
int ascent, descent, gap, fd;
|
||||
long sz, n;
|
||||
|
||||
if(nfonts >= Maxfonts)
|
||||
die("too many fonts");
|
||||
fd = open(path, OREAD);
|
||||
if(fd < 0)
|
||||
die("can't open font: %s", path);
|
||||
if(fd < 0){
|
||||
fprint(2, "strans: popup: can't open font: %s\n", path);
|
||||
return 0;
|
||||
}
|
||||
sz = seek(fd, 0, 2);
|
||||
seek(fd, 0, 0);
|
||||
fontdata[nfonts] = emalloc(sz);
|
||||
n = readn(fd, fontdata[nfonts], sz);
|
||||
close(fd);
|
||||
if(n != sz)
|
||||
die("can't read font: %s", path);
|
||||
if(!stbtt_InitFont(&fonts[nfonts], fontdata[nfonts], stbtt_GetFontOffsetForIndex(fontdata[nfonts], 0)))
|
||||
die("can't init font: %s", path);
|
||||
scale[nfonts] = stbtt_ScaleForPixelHeight(&fonts[nfonts], Fontsz);
|
||||
nfonts++;
|
||||
}
|
||||
|
||||
static int
|
||||
isfont(char *name)
|
||||
{
|
||||
char *p;
|
||||
|
||||
p = strrchr(name, '.');
|
||||
if(p == nil)
|
||||
if(sz <= 0){
|
||||
fprint(2, "strans: popup: empty font: %s\n", path);
|
||||
close(fd);
|
||||
return 0;
|
||||
return strcmp(p, ".ttf") == 0 || strcmp(p, ".otf") == 0;
|
||||
}
|
||||
f = &fonts[nfonts];
|
||||
f->data = emalloc(sz);
|
||||
n = readn(fd, f->data, sz);
|
||||
close(fd);
|
||||
if(n != sz){
|
||||
fprint(2, "strans: popup: can't read font: %s\n", path);
|
||||
free(f->data);
|
||||
f->data = nil;
|
||||
return 0;
|
||||
}
|
||||
if(!stbtt_InitFont(&f->info, f->data,
|
||||
stbtt_GetFontOffsetForIndex(f->data, 0))){
|
||||
fprint(2, "strans: popup: can't init font: %s\n", path);
|
||||
free(f->data);
|
||||
f->data = nil;
|
||||
return 0;
|
||||
}
|
||||
f->scale = stbtt_ScaleForPixelHeight(&f->info, Fontsz);
|
||||
stbtt_GetFontVMetrics(&f->info, &ascent, &descent, &gap);
|
||||
(void)descent;
|
||||
(void)gap;
|
||||
f->base = (int)(ascent * f->scale);
|
||||
nfonts++;
|
||||
return 1;
|
||||
}
|
||||
|
||||
void
|
||||
fontinit(char *dir)
|
||||
{
|
||||
int fd, n, i, a;
|
||||
Dir *d;
|
||||
static char *names[] = {
|
||||
"NotoSans-Regular.ttf",
|
||||
"NotoSansMonoCJKjp-Regular.otf",
|
||||
"NotoEmoji-Regular.ttf",
|
||||
};
|
||||
int i, a;
|
||||
char path[256];
|
||||
|
||||
fd = open(dir, OREAD);
|
||||
if(fd < 0)
|
||||
die("can't open font dir: %s", dir);
|
||||
n = dirreadall(fd, &d);
|
||||
close(fd);
|
||||
if(n < 0)
|
||||
die("can't read font dir: %s", dir);
|
||||
for(i = 0; i < n; i++){
|
||||
if(isfont(d[i].name)){
|
||||
snprint(path, sizeof path, "%s/%s", dir, d[i].name);
|
||||
loadfont(path);
|
||||
nfonts = 0;
|
||||
memset(cache, 0, sizeof cache);
|
||||
for(i = 0; i < nelem(names); i++){
|
||||
if(strlen(dir) + 1 + strlen(names[i]) + 1 > sizeof path){
|
||||
fprint(2, "strans: popup: font path is too long\n");
|
||||
continue;
|
||||
}
|
||||
snprint(path, sizeof path, "%s/%s", dir, names[i]);
|
||||
loadfont(path);
|
||||
}
|
||||
free(d);
|
||||
if(nfonts == 0)
|
||||
die("no fonts in %s", dir);
|
||||
for(a = 0; a < 256; a++){
|
||||
blendtab[0][a] = blend(Colbg, a);
|
||||
blendtab[1][a] = blend(Colsel, a);
|
||||
blendtab[0][a] = blend(Colbg, Colfg, a);
|
||||
blendtab[1][a] = blend(Colsel, Colfg, a);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
fontready(void)
|
||||
{
|
||||
return nfonts != 0;
|
||||
}
|
||||
|
||||
void
|
||||
putfont(u32int *buf, int w, int h, int px, int py, Rune r)
|
||||
{
|
||||
@@ -108,17 +129,21 @@ putfont(u32int *buf, int w, int h, int px, int py, Rune r)
|
||||
g = &cache[r];
|
||||
if(g->bmp == nil){
|
||||
for(f = 0; f < nfonts; f++){
|
||||
if(stbtt_FindGlyphIndex(&fonts[f], r) == 0)
|
||||
if(stbtt_FindGlyphIndex(&fonts[f].info, r) == 0)
|
||||
continue;
|
||||
g->bmp = stbtt_GetCodepointBitmap(&fonts[f], scale[f], scale[f], r, &g->w, &g->h, &g->ox, &g->oy);
|
||||
if(g->bmp != nil)
|
||||
g->bmp = stbtt_GetCodepointBitmap(&fonts[f].info,
|
||||
fonts[f].scale, fonts[f].scale, r,
|
||||
&g->w, &g->h, &g->ox, &g->oy);
|
||||
if(g->bmp != nil){
|
||||
g->base = fonts[f].base;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if(g->bmp == nil)
|
||||
return;
|
||||
}
|
||||
|
||||
y0 = py + g->oy + Fontsz - Fontbase;
|
||||
y0 = py + g->base + g->oy;
|
||||
j0 = y0 < 0 ? -y0 : 0;
|
||||
j1 = y0 + g->h > h ? h - y0 : g->h;
|
||||
x0 = px + g->ox;
|
||||
|
||||
Reference in New Issue
Block a user