hb-ot-font.cc | Explore in Territory

/*
 * Copyright © 2011,2014  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, Roozbeh Pournader
 */

#include "hb.hh"

#ifndef HB_NO_OT_FONT

#include "hb-ot.h"

#include "hb-cache.hh"
#include "hb-font.hh"
#include "hb-machinery.hh"
#include "hb-ot-face.hh"
#include "hb-outline.hh"

#include "hb-ot-cmap-table.hh"
#include "hb-ot-glyf-table.hh"
#include "hb-ot-cff2-table.hh"
#include "hb-ot-cff1-table.hh"
#include "hb-ot-hmtx-table.hh"
#include "hb-ot-post-table.hh"
#include "hb-ot-stat-table.hh" // Just so we compile it; unused otherwise.
#include "hb-ot-vorg-table.hh"
#include "OT/Color/CBDT/CBDT.hh"
#include "OT/Color/COLR/COLR.hh"
#include "OT/Color/sbix/sbix.hh"
#include "OT/Color/svg/svg.hh"


/**
 * SECTION:hb-ot-font
 * @title: hb-ot-font
 * @short_description: OpenType font implementation
 * @include: hb-ot.h
 *
 * Functions for using OpenType fonts with hb_shape().  Note that fonts returned
 * by hb_font_create() default to using these functions, so most clients would
 * never need to call these functions directly.
 **/

hb_ot_font_cmap_cache_t;
hb_ot_font_advance_cache_t;

#ifndef HB_NO_OT_FONT_CMAP_CACHE
static hb_user_data_key_t hb_ot_font_cmap_cache_user_data_key;
#endif

struct hb_ot_font_t
{ … };

static hb_ot_font_t *
_hb_ot_font_create (hb_font_t *font)
{ … }

static void
_hb_ot_font_destroy (void *font_data)
{ … }

static hb_bool_t
hb_ot_get_nominal_glyph (hb_font_t *font HB_UNUSED,
			 void *font_data,
			 hb_codepoint_t unicode,
			 hb_codepoint_t *glyph,
			 void *user_data HB_UNUSED)
{ … }

static unsigned int
hb_ot_get_nominal_glyphs (hb_font_t *font HB_UNUSED,
			  void *font_data,
			  unsigned int count,
			  const hb_codepoint_t *first_unicode,
			  unsigned int unicode_stride,
			  hb_codepoint_t *first_glyph,
			  unsigned int glyph_stride,
			  void *user_data HB_UNUSED)
{ … }

static hb_bool_t
hb_ot_get_variation_glyph (hb_font_t *font HB_UNUSED,
			   void *font_data,
			   hb_codepoint_t unicode,
			   hb_codepoint_t variation_selector,
			   hb_codepoint_t *glyph,
			   void *user_data HB_UNUSED)
{ … }

static void
hb_ot_get_glyph_h_advances (hb_font_t* font, void* font_data,
			    unsigned count,
			    const hb_codepoint_t *first_glyph,
			    unsigned glyph_stride,
			    hb_position_t *first_advance,
			    unsigned advance_stride,
			    void *user_data HB_UNUSED)
{ … }

#ifndef HB_NO_VERTICAL
static void
hb_ot_get_glyph_v_advances (hb_font_t* font, void* font_data,
			    unsigned count,
			    const hb_codepoint_t *first_glyph,
			    unsigned glyph_stride,
			    hb_position_t *first_advance,
			    unsigned advance_stride,
			    void *user_data HB_UNUSED)
{ … }
#endif

#ifndef HB_NO_VERTICAL
static hb_bool_t
hb_ot_get_glyph_v_origin (hb_font_t *font,
			  void *font_data,
			  hb_codepoint_t glyph,
			  hb_position_t *x,
			  hb_position_t *y,
			  void *user_data HB_UNUSED)
{ … }
#endif

static hb_bool_t
hb_ot_get_glyph_extents (hb_font_t *font,
			 void *font_data,
			 hb_codepoint_t glyph,
			 hb_glyph_extents_t *extents,
			 void *user_data HB_UNUSED)
{ … }

#ifndef HB_NO_OT_FONT_GLYPH_NAMES
static hb_bool_t
hb_ot_get_glyph_name (hb_font_t *font HB_UNUSED,
		      void *font_data,
		      hb_codepoint_t glyph,
		      char *name, unsigned int size,
		      void *user_data HB_UNUSED)
{ … }
static hb_bool_t
hb_ot_get_glyph_from_name (hb_font_t *font HB_UNUSED,
			   void *font_data,
			   const char *name, int len,
			   hb_codepoint_t *glyph,
			   void *user_data HB_UNUSED)
{ … }
#endif

static hb_bool_t
hb_ot_get_font_h_extents (hb_font_t *font,
			  void *font_data HB_UNUSED,
			  hb_font_extents_t *metrics,
			  void *user_data HB_UNUSED)
{ … }

#ifndef HB_NO_VERTICAL
static hb_bool_t
hb_ot_get_font_v_extents (hb_font_t *font,
			  void *font_data HB_UNUSED,
			  hb_font_extents_t *metrics,
			  void *user_data HB_UNUSED)
{ … }
#endif

#ifndef HB_NO_DRAW
static void
hb_ot_draw_glyph (hb_font_t *font,
		  void *font_data HB_UNUSED,
		  hb_codepoint_t glyph,
		  hb_draw_funcs_t *draw_funcs, void *draw_data,
		  void *user_data)
{
  bool embolden = font->x_strength || font->y_strength;
  hb_outline_t outline;

  { // Need draw_session to be destructed before emboldening.
    hb_draw_session_t draw_session (embolden ? hb_outline_recording_pen_get_funcs () : draw_funcs,
				    embolden ? &outline : draw_data, font->slant_xy);
    if (!font->face->table.glyf->get_path (font, glyph, draw_session))
#ifndef HB_NO_CFF
    if (!font->face->table.cff2->get_path (font, glyph, draw_session))
    if (!font->face->table.cff1->get_path (font, glyph, draw_session))
#endif
    {}
  }

  if (embolden)
  {
    float x_shift = font->embolden_in_place ? 0 : (float) font->x_strength / 2;
    float y_shift = (float) font->y_strength / 2;
    if (font->x_scale < 0) x_shift = -x_shift;
    if (font->y_scale < 0) y_shift = -y_shift;
    outline.embolden (font->x_strength, font->y_strength,
		      x_shift, y_shift);

    outline.replay (draw_funcs, draw_data);
  }
}
#endif

#ifndef HB_NO_PAINT
static void
hb_ot_paint_glyph (hb_font_t *font,
                   void *font_data,
                   hb_codepoint_t glyph,
                   hb_paint_funcs_t *paint_funcs, void *paint_data,
                   unsigned int palette,
                   hb_color_t foreground,
                   void *user_data)
{
#ifndef HB_NO_COLOR
  if (font->face->table.COLR->paint_glyph (font, glyph, paint_funcs, paint_data, palette, foreground)) return;
  if (font->face->table.SVG->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
#ifndef HB_NO_OT_FONT_BITMAP
  if (font->face->table.CBDT->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
  if (font->face->table.sbix->paint_glyph (font, glyph, paint_funcs, paint_data)) return;
#endif
#endif
  if (font->face->table.glyf->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
#ifndef HB_NO_CFF
  if (font->face->table.cff2->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
  if (font->face->table.cff1->paint_glyph (font, glyph, paint_funcs, paint_data, foreground)) return;
#endif
}
#endif

static inline void free_static_ot_funcs ();

static struct hb_ot_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ot_font_funcs_lazy_loader_t>
{ … } static_ot_funcs;

static inline
void free_static_ot_funcs ()
{ … }

static hb_font_funcs_t *
_hb_ot_get_font_funcs ()
{ … }


/**
 * hb_ot_font_set_funcs:
 * @font: #hb_font_t to work upon
 *
 * Sets the font functions to use when working with @font. 
 *
 * Since: 0.9.28
 **/
void
hb_ot_font_set_funcs (hb_font_t *font)
{ … }

#endif
chromium/third_party/harfbuzz-ng/src/src/hb-ot-font.cc
