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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_NO_RASTER_SVG
#include "hb.hh"
#include "hb-raster-svg-use.hh"
#include "hb-raster-svg-base.hh"
void
hb_raster_svg_render_use_element (const hb_svg_use_context_t *ctx,
hb_svg_xml_parser_t &parser,
const void *state,
hb_svg_str_t transform_str,
hb_svg_use_render_cb_t render_cb,
void *render_user)
{
hb_svg_str_t href = hb_raster_svg_find_href_attr (parser);
hb_svg_str_t ref_id;
if (!hb_raster_svg_parse_local_id_ref (href, &ref_id, nullptr))
return;
float use_x = 0.f, use_y = 0.f, use_w = 0.f, use_h = 0.f;
hb_raster_svg_parse_use_geometry (parser, &use_x, &use_y, &use_w, &use_h);
bool has_translate = (use_x != 0.f || use_y != 0.f);
bool has_use_transform = transform_str.len > 0;
if (has_use_transform)
{
hb_svg_transform_t t;
hb_raster_svg_parse_transform (transform_str, &t);
hb_paint_push_transform (ctx->pfuncs, ctx->paint, t.xx, t.yx, t.xy, t.yy, t.dx, t.dy);
}
if (has_translate)
hb_paint_push_transform (ctx->pfuncs, ctx->paint, 1, 0, 0, 1, use_x, use_y);
const char *found = nullptr;
hb_raster_svg_find_element_by_id (ctx->doc_start, ctx->doc_len, ctx->svg_accel, ctx->doc_cache,
ref_id, &found);
if (found)
{
bool can_render = true;
hb_decycler_node_t node (*ctx->use_decycler);
if (unlikely (!node.visit ((uintptr_t) found)))
can_render = false;
if (can_render)
{
unsigned remaining = ctx->doc_start + ctx->doc_len - found;
hb_svg_xml_parser_t ref_parser (found, remaining);
hb_svg_token_type_t tok = ref_parser.next ();
if (tok == SVG_TOKEN_OPEN_TAG || tok == SVG_TOKEN_SELF_CLOSE_TAG)
{
bool has_viewport_scale = false;
hb_svg_transform_t t;
if (hb_raster_svg_compute_use_target_viewbox_transform (ref_parser, use_w, use_h, &t))
{
hb_paint_push_transform (ctx->pfuncs, ctx->paint, t.xx, t.yx, t.xy, t.yy, t.dx, t.dy);
has_viewport_scale = true;
}
render_cb (render_user, ref_parser, state, has_viewport_scale);
if (has_viewport_scale)
hb_paint_pop_transform (ctx->pfuncs, ctx->paint);
}
}
}
if (has_translate)
hb_paint_pop_transform (ctx->pfuncs, ctx->paint);
if (has_use_transform)
hb_paint_pop_transform (ctx->pfuncs, ctx->paint);
}
#endif /* !HB_NO_RASTER_SVG */