/* * Copyright © 2018 Adobe 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. * * Adobe Author(s): Michiharu Ariza */ #include "hb.hh" #ifndef HB_NO_OT_FONT_CFF #include "hb-ot-cff2-table.hh" #include "hb-cff2-interp-cs.hh" #include "hb-draw.hh" using namespace CFF; struct cff2_extents_param_t { void init () { path_open = false; min_x.set_int (INT_MAX); min_y.set_int (INT_MAX); max_x.set_int (INT_MIN); max_y.set_int (INT_MIN); } void start_path () { path_open = true; } void end_path () { path_open = false; } bool is_path_open () const { return path_open; } void update_bounds (const point_t &pt) { if (pt.x < min_x) min_x = pt.x; if (pt.x > max_x) max_x = pt.x; if (pt.y < min_y) min_y = pt.y; if (pt.y > max_y) max_y = pt.y; } bool path_open; number_t min_x; number_t min_y; number_t max_x; number_t max_y; }; struct cff2_path_procs_extents_t : path_procs_t<cff2_path_procs_extents_t, cff2_cs_interp_env_t, cff2_extents_param_t> { static void moveto (cff2_cs_interp_env_t &env, cff2_extents_param_t& param, const point_t &pt) { param.end_path (); env.moveto (pt); } static void line (cff2_cs_interp_env_t &env, cff2_extents_param_t& param, const point_t &pt1) { if (!param.is_path_open ()) { param.start_path (); param.update_bounds (env.get_pt ()); } env.moveto (pt1); param.update_bounds (env.get_pt ()); } static void curve (cff2_cs_interp_env_t &env, cff2_extents_param_t& param, const point_t &pt1, const point_t &pt2, const point_t &pt3) { if (!param.is_path_open ()) { param.start_path (); param.update_bounds (env.get_pt ()); } /* include control points */ param.update_bounds (pt1); param.update_bounds (pt2); env.moveto (pt3); param.update_bounds (env.get_pt ()); } }; struct cff2_cs_opset_extents_t : cff2_cs_opset_t<cff2_cs_opset_extents_t, cff2_extents_param_t, cff2_path_procs_extents_t> {}; bool OT::cff2::accelerator_t::get_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) const { #ifdef HB_NO_OT_FONT_CFF /* XXX Remove check when this code moves to .hh file. */ return true; #endif if (unlikely (!is_valid () || (glyph >= num_glyphs))) return false; unsigned int fd = fdSelect->get_fd (glyph); cff2_cs_interpreter_t<cff2_cs_opset_extents_t, cff2_extents_param_t> interp; const byte_str_t str = (*charStrings)[glyph]; interp.env.init (str, *this, fd, font->coords, font->num_coords); cff2_extents_param_t param; param.init (); if (unlikely (!interp.interpret (param))) return false; if (param.min_x >= param.max_x) { extents->width = 0; extents->x_bearing = 0; } else { extents->x_bearing = font->em_scalef_x (param.min_x.to_real ()); extents->width = font->em_scalef_x (param.max_x.to_real ()) - extents->x_bearing; } if (param.min_y >= param.max_y) { extents->height = 0; extents->y_bearing = 0; } else { extents->y_bearing = font->em_scalef_y (param.max_y.to_real ()); extents->height = font->em_scalef_y (param.min_y.to_real ()) - extents->y_bearing; } return true; } #ifdef HB_EXPERIMENTAL_API struct cff2_path_param_t { cff2_path_param_t (hb_font_t *font_, draw_helper_t &draw_helper_) { draw_helper = &draw_helper_; font = font_; } void move_to (const point_t &p) { draw_helper->move_to (font->em_scalef_x (p.x.to_real ()), font->em_scalef_y (p.y.to_real ())); } void line_to (const point_t &p) { draw_helper->line_to (font->em_scalef_x (p.x.to_real ()), font->em_scalef_y (p.y.to_real ())); } void cubic_to (const point_t &p1, const point_t &p2, const point_t &p3) { draw_helper->cubic_to (font->em_scalef_x (p1.x.to_real ()), font->em_scalef_y (p1.y.to_real ()), font->em_scalef_x (p2.x.to_real ()), font->em_scalef_y (p2.y.to_real ()), font->em_scalef_x (p3.x.to_real ()), font->em_scalef_y (p3.y.to_real ())); } protected: draw_helper_t *draw_helper; hb_font_t *font; }; struct cff2_path_procs_path_t : path_procs_t<cff2_path_procs_path_t, cff2_cs_interp_env_t, cff2_path_param_t> { static void moveto (cff2_cs_interp_env_t &env, cff2_path_param_t& param, const point_t &pt) { param.move_to (pt); env.moveto (pt); } static void line (cff2_cs_interp_env_t &env, cff2_path_param_t& param, const point_t &pt1) { param.line_to (pt1); env.moveto (pt1); } static void curve (cff2_cs_interp_env_t &env, cff2_path_param_t& param, const point_t &pt1, const point_t &pt2, const point_t &pt3) { param.cubic_to (pt1, pt2, pt3); env.moveto (pt3); } }; struct cff2_cs_opset_path_t : cff2_cs_opset_t<cff2_cs_opset_path_t, cff2_path_param_t, cff2_path_procs_path_t> {}; bool OT::cff2::accelerator_t::get_path (hb_font_t *font, hb_codepoint_t glyph, draw_helper_t &draw_helper) const { #ifdef HB_NO_OT_FONT_CFF /* XXX Remove check when this code moves to .hh file. */ return true; #endif if (unlikely (!is_valid () || (glyph >= num_glyphs))) return false; unsigned int fd = fdSelect->get_fd (glyph); cff2_cs_interpreter_t<cff2_cs_opset_path_t, cff2_path_param_t> interp; const byte_str_t str = (*charStrings)[glyph]; interp.env.init (str, *this, fd, font->coords, font->num_coords); cff2_path_param_t param (font, draw_helper); if (unlikely (!interp.interpret (param))) return false; return true; } #endif #endif