/src/harfbuzz/src/hb-kern.hh

Source (jump to first uncovered line)
/*
 * Copyright © 2017  Google, Inc.
 *
 *  This is part of HarfBuzz, a text shaping library.
 *
 * Permission is hereby granted, without written agreement and without
 * license or royalty fees, to use, copy, modify, and distribute this
 * software and its documentation for any purpose, provided that the
 * above copyright notice and the following two paragraphs appear in
 * all copies of this software.
 *
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Google Author(s): Behdad Esfahbod
 */

#ifndef HB_KERN_HH
#define HB_KERN_HH

#include "hb-open-type.hh"
#include "hb-aat-layout-common.hh"
#include "hb-ot-layout-gpos-table.hh"


namespace OT {


template <typename Driver>
struct hb_kern_machine_t
{
  hb_kern_machine_t (const Driver &driver_,
         bool crossStream_ = false) :
           driver (driver_),
           crossStream (crossStream_) {}

  HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
  void kern (hb_font_t   *font,
       hb_buffer_t *buffer,
       hb_mask_t    kern_mask,
       bool         scale = true) const
  {
    if (!buffer->message (font, "start kern"))
      return;

    buffer->unsafe_to_concat ();
    OT::hb_ot_apply_context_t c (1, font, buffer, hb_blob_get_empty ());
    c.set_lookup_mask (kern_mask);
    c.set_lookup_props (OT::LookupFlag::IgnoreMarks);
    auto &skippy_iter = c.iter_input;

    bool horizontal = HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction);
    unsigned int count = buffer->len;
    hb_glyph_info_t *info = buffer->info;
    hb_glyph_position_t *pos = buffer->pos;
    for (unsigned int idx = 0; idx < count;)
    {
      if (!(info[idx].mask & kern_mask))
      {
  idx++;
  continue;
      }

      skippy_iter.reset (idx);
      unsigned unsafe_to;
      if (!skippy_iter.next (&unsafe_to))
      {
  idx++;
  continue;
      }

      unsigned int i = idx;
      unsigned int j = skippy_iter.idx;

      hb_position_t kern = driver.get_kerning (info[i].codepoint,
                 info[j].codepoint);


      if (likely (!kern))
  goto skip;

      if (horizontal)
      {
  if (scale)
    kern = font->em_scale_x (kern);
  if (crossStream)
  {
    pos[j].y_offset = kern;
    buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
  }
  else
  {
    hb_position_t kern1 = kern >> 1;
    hb_position_t kern2 = kern - kern1;
    pos[i].x_advance += kern1;
    pos[j].x_advance += kern2;
    pos[j].x_offset += kern2;
  }
      }
      else
      {
  if (scale)
    kern = font->em_scale_y (kern);
  if (crossStream)
  {
    pos[j].x_offset = kern;
    buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
  }
  else
  {
    hb_position_t kern1 = kern >> 1;
    hb_position_t kern2 = kern - kern1;
    pos[i].y_advance += kern1;
    pos[j].y_advance += kern2;
    pos[j].y_offset += kern2;
  }
      }

      buffer->unsafe_to_break (i, j + 1);

    skip:
      idx = skippy_iter.idx;
    }

    (void) buffer->message (font, "end kern");
  }

  const Driver &driver;
  bool crossStream;
};


} /* namespace OT */


#endif /* HB_KERN_HH */

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright © 2017 Google, Inc.
3		*
4		* This is part of HarfBuzz, a text shaping library.
5		*
6		* Permission is hereby granted, without written agreement and without
7		* license or royalty fees, to use, copy, modify, and distribute this
8		* software and its documentation for any purpose, provided that the
9		* above copyright notice and the following two paragraphs appear in
10		* all copies of this software.
11		*
12		* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13		* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14		* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15		* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16		* DAMAGE.
17		*
18		* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19		* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20		* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21		* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22		* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23		*
24		* Google Author(s): Behdad Esfahbod
25		*/
26
27		#ifndef HB_KERN_HH
28		#define HB_KERN_HH
29
30		#include "hb-open-type.hh"
31		#include "hb-aat-layout-common.hh"
32		#include "hb-ot-layout-gpos-table.hh"
33
34
35		namespace OT {
36
37
38		template <typename Driver>
39		struct hb_kern_machine_t
40		{
41		hb_kern_machine_t (const Driver &driver_,
42		bool crossStream_ = false) :
43		driver (driver_),
44	0	crossStream (crossStream_) {} Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<AAT::KerxSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat0<AAT::KerxSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<AAT::KerxSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat2<AAT::KerxSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat6<AAT::KerxSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat6<AAT::KerxSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<OT::KernOTSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat0<OT::KernOTSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<OT::KernOTSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat2<OT::KernOTSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<OT::KernSubTableFormat3<OT::KernOTSubTableHeader> >::hb_kern_machine_t(OT::KernSubTableFormat3<OT::KernOTSubTableHeader> const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<OT::KernAATSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat0<OT::KernAATSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<OT::KernAATSubTableHeader>::accelerator_t>::hb_kern_machine_t(AAT::KerxSubTableFormat2<OT::KernAATSubTableHeader>::accelerator_t const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<OT::KernSubTableFormat3<OT::KernAATSubTableHeader> >::hb_kern_machine_t(OT::KernSubTableFormat3<OT::KernAATSubTableHeader> const&, bool) Unexecuted instantiation: OT::hb_kern_machine_t<hb_ot_shape_fallback_kern_driver_t>::hb_kern_machine_t(hb_ot_shape_fallback_kern_driver_t const&, bool)
45
46		HB_NO_SANITIZE_SIGNED_INTEGER_OVERFLOW
47		void kern (hb_font_t *font,
48		hb_buffer_t *buffer,
49		hb_mask_t kern_mask,
50		bool scale = true) const
51	0	{
52	0	if (!buffer->message (font, "start kern"))
53	0	return;
54
55	0	buffer->unsafe_to_concat ();
56	0	OT::hb_ot_apply_context_t c (1, font, buffer, hb_blob_get_empty ());
57	0	c.set_lookup_mask (kern_mask);
58	0	c.set_lookup_props (OT::LookupFlag::IgnoreMarks);
59	0	auto &skippy_iter = c.iter_input;
60
61	0	bool horizontal = HB_DIRECTION_IS_HORIZONTAL (buffer->props.direction);
62	0	unsigned int count = buffer->len;
63	0	hb_glyph_info_t *info = buffer->info;
64	0	hb_glyph_position_t *pos = buffer->pos;
65	0	for (unsigned int idx = 0; idx < count;)
66	0	{
67	0	if (!(info[idx].mask & kern_mask))
68	0	{
69	0	idx++;
70	0	continue;
71	0	}
72
73	0	skippy_iter.reset (idx);
74	0	unsigned unsafe_to;
75	0	if (!skippy_iter.next (&unsafe_to))
76	0	{
77	0	idx++;
78	0	continue;
79	0	}
80
81	0	unsigned int i = idx;
82	0	unsigned int j = skippy_iter.idx;
83
84	0	hb_position_t kern = driver.get_kerning (info[i].codepoint,
85	0	info[j].codepoint);
86
87
88	0	if (likely (!kern))
89	0	goto skip;
90
91	0	if (horizontal)
92	0	{
93	0	if (scale)
94	0	kern = font->em_scale_x (kern);
95	0	if (crossStream)
96	0	{
97	0	pos[j].y_offset = kern;
98	0	buffer->scratch_flags \|= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
99	0	}
100	0	else
101	0	{
102	0	hb_position_t kern1 = kern >> 1;
103	0	hb_position_t kern2 = kern - kern1;
104	0	pos[i].x_advance += kern1;
105	0	pos[j].x_advance += kern2;
106	0	pos[j].x_offset += kern2;
107	0	}
108	0	}
109	0	else
110	0	{
111	0	if (scale)
112	0	kern = font->em_scale_y (kern);
113	0	if (crossStream)
114	0	{
115	0	pos[j].x_offset = kern;
116	0	buffer->scratch_flags \|= HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT;
117	0	}
118	0	else
119	0	{
120	0	hb_position_t kern1 = kern >> 1;
121	0	hb_position_t kern2 = kern - kern1;
122	0	pos[i].y_advance += kern1;
123	0	pos[j].y_advance += kern2;
124	0	pos[j].y_offset += kern2;
125	0	}
126	0	}
127
128	0	buffer->unsafe_to_break (i, j + 1);
129
130	0	skip:
131	0	idx = skippy_iter.idx;
132	0	}
133
134	0	(void) buffer->message (font, "end kern");
135	0	} Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<OT::KernOTSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<OT::KernOTSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<OT::KernSubTableFormat3<OT::KernOTSubTableHeader> >::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<OT::KernAATSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<OT::KernAATSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<OT::KernSubTableFormat3<OT::KernAATSubTableHeader> >::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat0<AAT::KerxSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat2<AAT::KerxSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<AAT::KerxSubTableFormat6<AAT::KerxSubTableHeader>::accelerator_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const Unexecuted instantiation: OT::hb_kern_machine_t<hb_ot_shape_fallback_kern_driver_t>::kern(hb_font_t, hb_buffer_t, unsigned int, bool) const
136
137		const Driver &driver;
138		bool crossStream;
139		};
140
141
142		} /* namespace OT */
143
144
145		#endif /* HB_KERN_HH */

Coverage Report

Created: 2023-09-25 06:24