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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_VECTOR_DRAW_HH
#define HB_VECTOR_DRAW_HH
#include "hb.hh"
#include "hb-vector.h"
#include "hb-geometry.hh"
#include "hb-machinery.hh"
#include "hb-vector-buf.hh"
#include "hb-vector-internal.hh"
struct hb_vector_draw_t
{
hb_object_header_t header;
hb_vector_format_t format = HB_VECTOR_FORMAT_INVALID;
hb_transform_t<> transform = {1, 0, 0, 1, 0, 0};
float x_scale_factor = 1.f;
float y_scale_factor = 1.f;
hb_vector_extents_t extents = {0, 0, 0, 0};
bool has_extents = false;
hb_color_t foreground = HB_COLOR (0, 0, 0, 255);
hb_color_t background = HB_COLOR (0, 0, 0, 0);
hb_vector_buf_t defs;
hb_vector_buf_t body;
hb_vector_buf_t path;
hb_vector_buf_t pdf_extgstate_dict;
unsigned pdf_extgstate_count = 0;
void set_precision (unsigned p)
{
p = hb_min (p, 12u);
defs.precision = p;
body.precision = p;
path.precision = p;
}
unsigned get_precision () const { return path.precision; }
hb_blob_t *recycled_blob = nullptr;
void new_path ()
{
flush_path ();
}
void flush_path ()
{
if (!path.length) return;
switch (format)
{
case HB_VECTOR_FORMAT_PDF: flush_path_pdf (); break;
case HB_VECTOR_FORMAT_SVG: flush_path_svg (); break;
case HB_VECTOR_FORMAT_INVALID: default: break;
}
path.shrink (0);
}
void flush_path_pdf ()
{
unsigned a = hb_color_get_alpha (foreground);
if (a < 255)
{
unsigned gs_idx = pdf_extgstate_count++;
body.append_str ("/GS");
body.append_unsigned (gs_idx);
body.append_str (" gs\n");
pdf_extgstate_dict.append_str ("/GS");
pdf_extgstate_dict.append_unsigned (gs_idx);
pdf_extgstate_dict.append_str (" << /Type /ExtGState /ca ");
pdf_extgstate_dict.append_num (a / 255.f, 4);
pdf_extgstate_dict.append_str (" >> ");
}
body.append_num (hb_color_get_red (foreground) / 255.f, 4);
body.append_c (' ');
body.append_num (hb_color_get_green (foreground) / 255.f, 4);
body.append_c (' ');
body.append_num (hb_color_get_blue (foreground) / 255.f, 4);
body.append_str (" rg\n");
body.append_len (path.arrayZ, path.length);
body.append_str ("f\n");
}
void flush_path_svg ()
{
body.append_str ("<path d=\"");
body.append_len (path.arrayZ, path.length);
body.append_str ("\" fill=\"");
body.append_svg_color (foreground, true);
body.append_str ("\"/>\n");
}
void transform_xy (float x, float y, float *tx, float *ty)
{
hb_vector_transform_point (transform, x_scale_factor, y_scale_factor, x, y, tx, ty);
}
void append_xy (float x, float y, char sep)
{
float tx, ty;
transform_xy (x, y, &tx, &ty);
path.append_num (tx, path.precision);
path.append_c (sep);
path.append_num (ty, path.precision);
}
void append_xy_svg (float x, float y) { append_xy (x, y, ','); }
void append_xy_pdf (float x, float y) { append_xy (x, y, ' '); }
};
#endif /* HB_VECTOR_DRAW_HH */