85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
#ifndef OT_LAYOUT_GPOS_ANCHOR_HH
|
|
#define OT_LAYOUT_GPOS_ANCHOR_HH
|
|
|
|
#include "AnchorFormat1.hh"
|
|
#include "AnchorFormat2.hh"
|
|
#include "AnchorFormat3.hh"
|
|
|
|
namespace OT {
|
|
namespace Layout {
|
|
namespace GPOS_impl {
|
|
|
|
struct Anchor
|
|
{
|
|
protected:
|
|
union {
|
|
HBUINT16 format; /* Format identifier */
|
|
AnchorFormat1 format1;
|
|
AnchorFormat2 format2;
|
|
AnchorFormat3 format3;
|
|
} u;
|
|
public:
|
|
DEFINE_SIZE_UNION (2, format);
|
|
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
if (!u.format.sanitize (c)) return_trace (false);
|
|
switch (u.format) {
|
|
case 1: return_trace (u.format1.sanitize (c));
|
|
case 2: return_trace (u.format2.sanitize (c));
|
|
case 3: return_trace (u.format3.sanitize (c));
|
|
default:return_trace (true);
|
|
}
|
|
}
|
|
|
|
void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id,
|
|
float *x, float *y) const
|
|
{
|
|
*x = *y = 0;
|
|
switch (u.format) {
|
|
case 1: u.format1.get_anchor (c, glyph_id, x, y); return;
|
|
case 2: u.format2.get_anchor (c, glyph_id, x, y); return;
|
|
case 3: u.format3.get_anchor (c, glyph_id, x, y); return;
|
|
default: return;
|
|
}
|
|
}
|
|
|
|
bool subset (hb_subset_context_t *c) const
|
|
{
|
|
TRACE_SUBSET (this);
|
|
switch (u.format) {
|
|
case 1: return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
|
|
case 2:
|
|
if (c->plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
|
|
{
|
|
// AnchorFormat 2 just containins extra hinting information, so
|
|
// if hints are being dropped convert to format 1.
|
|
return_trace (bool (reinterpret_cast<Anchor *> (u.format1.copy (c->serializer))));
|
|
}
|
|
return_trace (bool (reinterpret_cast<Anchor *> (u.format2.copy (c->serializer))));
|
|
case 3: return_trace (bool (reinterpret_cast<Anchor *> (u.format3.copy (c->serializer,
|
|
c->plan->layout_variation_idx_map))));
|
|
default:return_trace (false);
|
|
}
|
|
}
|
|
|
|
void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
|
|
{
|
|
switch (u.format) {
|
|
case 1: case 2:
|
|
return;
|
|
case 3:
|
|
u.format3.collect_variation_indices (c);
|
|
return;
|
|
default: return;
|
|
}
|
|
}
|
|
};
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif // OT_LAYOUT_GPOS_ANCHOR_HH
|