| /* |
| * 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 |
| { |
| cff2_extents_param_t () |
| { |
| 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 = false; |
| 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<number_t>, cff2_extents_param_t> |
| { |
| static void moveto (cff2_cs_interp_env_t<number_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<number_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<number_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, number_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); |
| const hb_ubytes_t str = (*charStrings)[glyph]; |
| cff2_cs_interp_env_t<number_t> env (str, *this, fd, font->coords, font->num_coords); |
| cff2_cs_interpreter_t<cff2_cs_opset_extents_t, cff2_extents_param_t, number_t> interp (env); |
| cff2_extents_param_t param; |
| 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; |
| } |
| |
| struct cff2_path_param_t |
| { |
| cff2_path_param_t (hb_font_t *font_, hb_draw_session_t &draw_session_) |
| { |
| draw_session = &draw_session_; |
| font = font_; |
| } |
| |
| void move_to (const point_t &p) |
| { draw_session->move_to (font->em_fscalef_x (p.x.to_real ()), font->em_fscalef_y (p.y.to_real ())); } |
| |
| void line_to (const point_t &p) |
| { draw_session->line_to (font->em_fscalef_x (p.x.to_real ()), font->em_fscalef_y (p.y.to_real ())); } |
| |
| void cubic_to (const point_t &p1, const point_t &p2, const point_t &p3) |
| { |
| draw_session->cubic_to (font->em_fscalef_x (p1.x.to_real ()), font->em_fscalef_y (p1.y.to_real ()), |
| font->em_fscalef_x (p2.x.to_real ()), font->em_fscalef_y (p2.y.to_real ()), |
| font->em_fscalef_x (p3.x.to_real ()), font->em_fscalef_y (p3.y.to_real ())); |
| } |
| |
| protected: |
| hb_draw_session_t *draw_session; |
| hb_font_t *font; |
| }; |
| |
| struct cff2_path_procs_path_t : path_procs_t<cff2_path_procs_path_t, cff2_cs_interp_env_t<number_t>, cff2_path_param_t> |
| { |
| static void moveto (cff2_cs_interp_env_t<number_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<number_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<number_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, number_t, cff2_path_procs_path_t> {}; |
| |
| bool OT::cff2::accelerator_t::get_path (hb_font_t *font, hb_codepoint_t glyph, hb_draw_session_t &draw_session) 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); |
| const hb_ubytes_t str = (*charStrings)[glyph]; |
| cff2_cs_interp_env_t<number_t> env (str, *this, fd, font->coords, font->num_coords); |
| cff2_cs_interpreter_t<cff2_cs_opset_path_t, cff2_path_param_t, number_t> interp (env); |
| cff2_path_param_t param (font, draw_session); |
| if (unlikely (!interp.interpret (param))) return false; |
| return true; |
| } |
| |
| #endif |