146 lines
4.0 KiB
C++
146 lines
4.0 KiB
C++
/*
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* Copyright © 2018 Ebrahim Byagowi
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#ifndef HB_OT_COLOR_SVG_TABLE_HH
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#define HB_OT_COLOR_SVG_TABLE_HH
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#include "hb-open-type-private.hh"
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/*
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* SVG -- SVG (Scalable Vector Graphics)
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* https://docs.microsoft.com/en-us/typography/opentype/spec/svg
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*/
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#define HB_OT_TAG_SVG HB_TAG('S','V','G',' ')
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namespace OT {
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struct SVGDocumentIndexEntry
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{
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friend struct SVG;
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inline bool sanitize (hb_sanitize_context_t *c, const void* base) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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(base+svgDoc).sanitize (c, svgDocLength));
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}
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protected:
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HBUINT16 startGlyphID; /* The first glyph ID in the range described by
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* this index entry. */
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HBUINT16 endGlyphID; /* The last glyph ID in the range described by
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* this index entry. Must be >= startGlyphID. */
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LOffsetTo<UnsizedArrayOf<HBUINT8> >
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svgDoc; /* Offset from the beginning of the SVG Document Index
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* to an SVG document. Must be non-zero. */
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HBUINT32 svgDocLength; /* Length of the SVG document.
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* Must be non-zero. */
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public:
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DEFINE_SIZE_STATIC (12);
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};
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struct SVGDocumentIndex
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{
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friend struct SVG;
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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entries.sanitize (c, this));
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}
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protected:
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ArrayOf<SVGDocumentIndexEntry>
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entries; /* Array of SVG Document Index Entries. */
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public:
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DEFINE_SIZE_ARRAY (2, entries);
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};
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struct SVG
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{
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static const hb_tag_t tableTag = HB_OT_TAG_SVG;
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (likely (c->check_struct (this) &&
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(this+svgDocIndex).sanitize (c)));
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}
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struct accelerator_t
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{
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inline void init (hb_face_t *face)
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{
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OT::Sanitizer<OT::SVG> sanitizer;
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svg_blob = sanitizer.sanitize (face->reference_table (HB_OT_TAG_SVG));
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svg_len = hb_blob_get_length (svg_blob);
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svg = svg_blob->as<OT::SVG> ();
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}
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inline void fini (void)
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{
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hb_blob_destroy (svg_blob);
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}
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inline void
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dump (void (*callback) (const uint8_t* data, unsigned int length,
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unsigned int start_glyph, unsigned int end_glyph)) const
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{
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const SVGDocumentIndex &index = svg+svg->svgDocIndex;
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const ArrayOf<SVGDocumentIndexEntry> &entries = index.entries;
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for (unsigned int i = 0; i < entries.len; ++i)
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{
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const SVGDocumentIndexEntry &entry = entries[i];
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callback ((const uint8_t*) &entry.svgDoc (&index), entry.svgDocLength,
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entry.startGlyphID, entry.endGlyphID);
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}
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}
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private:
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hb_blob_t *svg_blob;
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const SVG *svg;
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unsigned int svg_len;
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};
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protected:
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HBUINT16 version; /* Table version (starting at 0). */
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LOffsetTo<SVGDocumentIndex>
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svgDocIndex; /* Offset (relative to the start of the SVG table) to the
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* SVG Documents Index. Must be non-zero. */
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HBUINT32 reserved; /* Set to 0. */
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public:
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DEFINE_SIZE_STATIC (10);
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};
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} /* namespace OT */
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#endif /* HB_OT_COLOR_SVG_TABLE_HH */
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