void
load(XFont *f)
{
int i, j;
CGFontRef font;
CFStringRef s;
UniChar u[256];
CGGlyph g[256];
CGRect bbox;
if(f->loaded)
return;
f->loaded = 1;
s = c2mac(f->name);
font = CGFontCreateWithFontName(s);
CFRelease(s);
if(font == nil)
return;
// assume bbox gives latin1 is height/ascent for all
bbox = subfontbbox(font, 0x00, 0xff);
f->unit = CGFontGetUnitsPerEm(font);
f->height = bbox.size.height;
f->originy = bbox.origin.y;
// figure out where the letters are
for(i=0; i<0xffff; i+=0x100) {
for(j=0; j<0x100; j++) {
u[j] = mapUnicode(i+j);
g[j] = 0;
}
CGFontGetGlyphsForUnichars(font, u, g, 256);
for(j=0; j<0x100; j++) {
if(g[j] != 0) {
f->range[i>>8] = 1;
f->nrange++;
break;
}
}
}
Memsubfont*
mksubfont(XFont *f, char *name, int lo, int hi, int size, int antialias)
{
CFStringRef s;
CGColorSpaceRef color;
CGContextRef ctxt;
CTFontRef font;
CTFontDescriptorRef desc;
CGRect bbox;
Memimage *m, *mc, *m1;
int x, y, y0;
int i, height, ascent;
Fontchar *fc, *fc0;
Memsubfont *sf;
CGFloat whitef[] = { 1.0, 1.0 };
CGColorRef white;
s = c2mac(name);
desc = CTFontDescriptorCreateWithNameAndSize(s, size);
CFRelease(s);
if(desc == nil)
return nil;
font = CTFontCreateWithFontDescriptor(desc, 0, nil);
CFRelease(desc);
if(font == nil)
return nil;
bbox = CTFontGetBoundingBox(font);
x = (int)(bbox.size.width*2 + 0.99999999);
fontheight(f, size, &height, &ascent);
y = height;
y0 = height - ascent;
m = allocmemimage(Rect(0, 0, x*(hi+1-lo)+1, y+1), GREY8);
if(m == nil)
return nil;
mc = allocmemimage(Rect(0, 0, x+1, y+1), GREY8);
if(mc == nil){
freememimage(m);
return nil;
}
memfillcolor(m, DBlack);
memfillcolor(mc, DBlack);
fc = malloc((hi+2 - lo) * sizeof fc[0]);
sf = malloc(sizeof *sf);
if(fc == nil || sf == nil) {
freememimage(m);
freememimage(mc);
free(fc);
free(sf);
return nil;
}
fc0 = fc;
color = CGColorSpaceCreateWithName(kCGColorSpaceGenericGray);
ctxt = CGBitmapContextCreate(byteaddr(mc, mc->r.min), Dx(mc->r), Dy(mc->r), 8,
mc->width*sizeof(u32int), color, kCGImageAlphaNone);
white = CGColorCreate(color, whitef);
CGColorSpaceRelease(color);
if(ctxt == nil) {
freememimage(m);
freememimage(mc);
free(fc);
free(sf);
return nil;
}
CGContextSetAllowsAntialiasing(ctxt, antialias);
CGContextSetTextPosition(ctxt, 0, 0); // XXX
#if OSX_VERSION >= 101400
CGContextSetAllowsFontSmoothing(ctxt, false);
#endif
x = 0;
for(i=lo; i<=hi; i++, fc++) {
char buf[20];
CFStringRef str;
CFDictionaryRef attrs;
CFAttributedStringRef attrString;
CTLineRef line;
CGRect r;
CGPoint p1;
CFStringRef keys[] = { kCTFontAttributeName, kCTForegroundColorAttributeName };
CFTypeRef values[] = { font, white };
sprint(buf, "%C", (Rune)mapUnicode(name, i));
str = c2mac(buf);
// See https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/CoreText_Programming/LayoutOperations/LayoutOperations.html#//apple_ref/doc/uid/TP40005533-CH12-SW2
attrs = CFDictionaryCreate(kCFAllocatorDefault, (const void**)&keys,
(const void**)&values, sizeof(keys) / sizeof(keys[0]),
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
attrString = CFAttributedStringCreate(kCFAllocatorDefault, str, attrs);
CFRelease(str);
CFRelease(attrs);
line = CTLineCreateWithAttributedString(attrString);
CGContextSetTextPosition(ctxt, 0, y0);
r = CTLineGetImageBounds(line, ctxt);
memfillcolor(mc, DBlack);
CTLineDraw(line, ctxt);
CFRelease(line);
fc->x = x;
fc->top = 0;
fc->bottom = Dy(m->r);
// fprint(2, "printed %#x: %g %g\n", mapUnicode(i), p1.x, p1.y);
p1 = CGContextGetTextPosition(ctxt);
if(p1.x <= 0 || mapUnicode(name, i) == 0xfffd) {
fc->width = 0;
fc->left = 0;
if(i == 0) {
drawpjw(m, fc, x, (int)(bbox.size.width + 0.99999999), y, y - y0);
x += fc->width;
}
continue;
}
memimagedraw(m, Rect(x, 0, x + p1.x, y), mc, ZP, memopaque, ZP, S);
fc->width = p1.x;
fc->left = 0;
x += p1.x;
}
fc->x = x;
// round up to 32-bit boundary
// so that in-memory data is same
// layout as in-file data.
if(x == 0)
x = 1;
if(y == 0)
y = 1;
if(antialias)
x += -x & 3;
else
x += -x & 31;
m1 = allocmemimage(Rect(0, 0, x, y), antialias ? GREY8 : GREY1);
memimagedraw(m1, m1->r, m, m->r.min, memopaque, ZP, S);
freememimage(m);
freememimage(mc);
sf->name = nil;
sf->n = hi+1 - lo;
sf->height = Dy(m1->r);
sf->ascent = Dy(m1->r) - y0;
sf->info = fc0;
sf->bits = m1;
return sf;
}
static void
fontheight(XFont *f, int size, int *height, int *ascent)
{
int i;
CFStringRef s;
CGRect bbox;
CTFontRef font;
CTFontDescriptorRef desc;
CGContextRef ctxt;
CGColorSpaceRef color;
s = c2mac(f->name);
desc = CTFontDescriptorCreateWithNameAndSize(s, size);
CFRelease(s);
if(desc == nil)
return;
font = CTFontCreateWithFontDescriptor(desc, 0, nil);
CFRelease(desc);
if(font == nil)
return;
color = CGColorSpaceCreateWithName(kCGColorSpaceGenericGray);
ctxt = CGBitmapContextCreate(nil, 1, 1, 8, 1, color, kCGImageAlphaNone);
CGColorSpaceRelease(color);
CGContextSetTextPosition(ctxt, 0, 0);
for(i=0; i<nelem(lines); i++) {
CFStringRef keys[] = { kCTFontAttributeName };
CFTypeRef values[] = { font };
CFStringRef str;
CFDictionaryRef attrs;
CFAttributedStringRef attrString;
CGRect r;
CTLineRef line;
str = c2mac(lines[i]);
// See https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/CoreText_Programming/LayoutOperations/LayoutOperations.html#//apple_ref/doc/uid/TP40005533-CH12-SW2
attrs = CFDictionaryCreate(kCFAllocatorDefault, (const void**)&keys,
(const void**)&values, sizeof(keys) / sizeof(keys[0]),
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
attrString = CFAttributedStringCreate(kCFAllocatorDefault, str, attrs);
CFRelease(str);
CFRelease(attrs);
line = CTLineCreateWithAttributedString(attrString);
r = CTLineGetImageBounds(line, ctxt);
r.size.width += r.origin.x;
r.size.height += r.origin.y;
CFRelease(line);
// fprint(2, "%s: %g %g %g %g\n", lines[i], r.origin.x, r.origin.y, r.size.width, r.size.height);
if(i == 0)
bbox = r;
if(bbox.origin.x > r.origin.x)
bbox.origin.x = r.origin.x;
if(bbox.origin.y > r.origin.y)
bbox.origin.y = r.origin.y;
if(bbox.size.width < r.size.width)
bbox.size.width = r.size.width;
if(bbox.size.height < r.size.height)
bbox.size.height = r.size.height;
}
bbox.size.width -= bbox.origin.x;
bbox.size.height -= bbox.origin.y;
*height = bbox.size.height + 0.999999;
*ascent = *height - (-bbox.origin.y + 0.999999);
CGContextRelease(ctxt);
CFRelease(font);
}
