[ot-color] sbix table implementation (#870)
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Ebrahim Byagowi
GitHub
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commit
4c63c82383
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@ -18,6 +18,7 @@ HB_BASE_sources = \
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hb-open-file-private.hh \
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hb-open-type-private.hh \
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hb-ot-color-cbdt-table.hh \
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hb-ot-color-sbix-table.hh \
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hb-ot-cmap-table.hh \
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hb-ot-glyf-table.hh \
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hb-ot-hdmx-table.hh \
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@ -0,0 +1,128 @@
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/*
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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_SBIX_TABLE_HH
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#define HB_OT_COLOR_SBIX_TABLE_HH
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#include "hb-open-type-private.hh"
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#define HB_OT_TAG_SBIX HB_TAG('s','b','i','x')
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namespace OT {
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struct SBIXGlyph
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{
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friend struct sbix;
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protected:
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HBINT16 originOffsetX;
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HBINT16 originOffsetY;
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unsigned char tag[4];
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HBUINT8 data[VAR];
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public:
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DEFINE_SIZE_STATIC (9);
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};
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struct ImageTable
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{
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friend struct sbix;
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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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c->check_array (imageOffsetsZ, sizeof (HBUINT32), c->num_glyphs) &&
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c->check_range (this, imageOffsetsZ[c->num_glyphs]));
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}
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protected:
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HBUINT16 ppem;
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HBUINT16 resolution;
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LOffsetTo<SBIXGlyph> imageOffsetsZ[VAR]; // VAR=maxp.numGlyphs + 1
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public:
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DEFINE_SIZE_STATIC (8);
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};
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/*
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* sbix -- Standard Bitmap Graphics Table
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*/
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// It should be called with something like this so it can have
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// access to num_glyph while sanitizing.
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//
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// static inline const OT::sbix*
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// _get_sbix (hb_face_t *face)
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// {
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// OT::Sanitizer<OT::sbix> sanitizer;
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// sanitizer.set_num_glyphs (face->get_num_glyphs ());
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// hb_blob_t *sbix_blob = sanitizer.sanitize (face->reference_table (HB_OT_TAG_SBIX));
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// return OT::Sanitizer<OT::sbix>::lock_instance (sbix_blob);
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// }
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//
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struct sbix
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{
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static const hb_tag_t tableTag = HB_OT_TAG_SBIX;
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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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if (!(c->check_struct (this) && imageTables.sanitize (c, this)))
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return_trace (false);
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for (unsigned int i = 0; i < imageTables.len; ++i)
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if (!(imageTables[i].sanitize (c, this)))
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return_trace (false);
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// dump (c->num_glyphs, 8);
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return_trace (true);
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}
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// inline void dump (unsigned int num_glyphs, unsigned int group) const
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// {
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// const ImageTable &imageTable = imageTables[group](this);
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// for (unsigned int i = 0; i < num_glyphs; ++i)
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// if (imageTable.imageOffsetsZ[i + 1] - imageTable.imageOffsetsZ[i] > 0)
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// {
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// const SBIXGlyph &sbixGlyph = imageTable.imageOffsetsZ[i]((const void *) &imageTable);
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// char outName[255];
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// sprintf (outName, "out/%d-%d.png", group, i);
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// FILE *f = fopen (outName, "wb");
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// fwrite (sbixGlyph.data, 1,
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// imageTable.imageOffsetsZ[i + 1] - imageTable.imageOffsetsZ[i] - 8, f);
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// fclose (f);
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// }
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// }
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protected:
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HBUINT16 version;
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HBUINT16 flags;
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ArrayOf<LOffsetTo<ImageTable>, HBUINT32> imageTables;
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public:
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DEFINE_SIZE_ARRAY (8, imageTables);
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};
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} /* namespace OT */
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#endif /* HB_OT_COLOR_SBIX_TABLE_HH */
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@ -39,6 +39,7 @@
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#include "hb-ot-name-table.hh" // Just so we compile it; unused otherwise.
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#include "hb-ot-color-colr-table.hh"
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#include "hb-ot-color-cpal-table.hh"
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#include "hb-ot-color-sbix-table.hh" // Just so we compile it; unused otherwise.
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#include "hb-ot-map-private.hh"
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