hb-raster-svg-defs.hh

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/*

 * Copyright © 2026  Behdad Esfahbod

 *  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.

 * Author(s): Behdad Esfahbod

*/

#ifndef HB_RASTER_SVG_DEFS_HH

#define HB_RASTER_SVG_DEFS_HH

#include "hb.hh"

#include "hb-map.hh"

#include "hb-raster-svg-parse.hh"

enum hb_svg_gradient_type_t

  SVG_GRADIENT_LINEAR,

  SVG_GRADIENT_RADIAL

};

struct hb_svg_gradient_stop_t

  float offset;

  hb_color_t color;

  bool is_current_color = false;

};

struct hb_svg_gradient_t

  hb_svg_gradient_type_t type;

  hb_paint_extend_t spread = HB_PAINT_EXTEND_PAD;

  bool has_spread = false;

  hb_svg_transform_t gradient_transform;

  bool has_gradient_transform = false;

  bool units_user_space = false;

  bool has_units_user_space = false;

  float x1 = 0, y1 = 0, x2 = 1, y2 = 0;

  bool has_x1 = false, has_y1 = false, has_x2 = false, has_y2 = false;

  float cx = 0.5f, cy = 0.5f, r = 0.5f;

  float fx = -1.f, fy = -1.f, fr = 0.f;

  bool has_cx = false, has_cy = false, has_r = false;

  bool has_fx = false, has_fy = false, has_fr = false;

  hb_vector_t<hb_svg_gradient_stop_t> stops;

  hb_bytes_t href_id = {};

};

struct hb_svg_clip_path_def_t

  unsigned first_shape = 0;

  unsigned shape_count = 0;

  hb_svg_transform_t clip_transform;

  bool has_clip_transform = false;

  bool units_user_space = true;

};

struct hb_svg_clip_shape_t

  hb_svg_shape_emit_data_t shape;

  hb_svg_transform_t transform;

  bool has_transform = false;

};

struct hb_svg_defs_t

  hb_vector_t<hb_svg_gradient_t> gradients;

  hb_vector_t<hb_svg_clip_shape_t> clip_shapes;

  hb_vector_t<hb_svg_clip_path_def_t> clip_paths;

  hb_hashmap_t<hb_bytes_t, unsigned> gradient_by_id;

  hb_hashmap_t<hb_bytes_t, unsigned> clip_path_by_id;

  hb_vector_t<char *> owned_id_strings;

  ~hb_svg_defs_t ();

  bool add_id_mapping (hb_hashmap_t<hb_bytes_t, unsigned> *map,

                       hb_bytes_t id,

                       unsigned idx);

  bool add_gradient (hb_bytes_t id, const hb_svg_gradient_t &grad);

  const hb_svg_gradient_t *find_gradient (hb_bytes_t id) const;

  bool add_clip_path (hb_bytes_t id, const hb_svg_clip_path_def_t &clip);

  const hb_svg_clip_path_def_t *find_clip_path (hb_bytes_t id) const;

};

#endif /* HB_RASTER_SVG_DEFS_HH */