| /* |
| * Copyright © 2018 Ebrahim Byagowi |
| * |
| * 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. |
| */ |
| |
| #ifndef HB_OT_COLOR_COLR_TABLE_HH |
| #define HB_OT_COLOR_COLR_TABLE_HH |
| |
| #include "hb-open-type.hh" |
| |
| /* |
| * COLR -- Color |
| * https://docs.microsoft.com/en-us/typography/opentype/spec/colr |
| */ |
| #define HB_OT_TAG_COLR HB_TAG('C','O','L','R') |
| |
| |
| namespace OT { |
| |
| |
| struct LayerRecord |
| { |
| friend struct COLR; |
| |
| inline bool sanitize (hb_sanitize_context_t *c) const |
| { |
| TRACE_SANITIZE (this); |
| return_trace (c->check_struct (this)); |
| } |
| |
| protected: |
| GlyphID glyphid; /* Glyph ID of layer glyph */ |
| HBUINT16 colorIdx; /* Index value to use with a selected color palette */ |
| public: |
| DEFINE_SIZE_STATIC (4); |
| }; |
| |
| struct BaseGlyphRecord |
| { |
| friend struct COLR; |
| |
| inline bool sanitize (hb_sanitize_context_t *c) const |
| { |
| TRACE_SANITIZE (this); |
| return_trace (likely (c->check_struct (this))); |
| } |
| |
| inline int cmp (hb_codepoint_t g) const { |
| return g < glyphid ? -1 : g > glyphid ? 1 : 0; |
| } |
| |
| protected: |
| GlyphID glyphid; /* Glyph ID of reference glyph */ |
| HBUINT16 firstLayerIdx; /* Index to the layer record */ |
| HBUINT16 numLayers; /* Number of color layers associated with this glyph */ |
| public: |
| DEFINE_SIZE_STATIC (6); |
| }; |
| |
| static int compare_bgr (const void *pa, const void *pb) |
| { |
| const hb_codepoint_t *a = (const hb_codepoint_t *) pa; |
| const BaseGlyphRecord *b = (const BaseGlyphRecord *) pb; |
| return b->cmp (*a); |
| } |
| |
| struct COLR |
| { |
| static const hb_tag_t tableTag = HB_OT_TAG_COLR; |
| |
| inline bool sanitize (hb_sanitize_context_t *c) const |
| { |
| TRACE_SANITIZE (this); |
| return_trace (likely (c->check_struct (this) && |
| (this+baseGlyphsZ).sanitize (c, numBaseGlyphs) && |
| (this+layersZ).sanitize (c, numLayers))); |
| } |
| |
| inline bool get_base_glyph_record (hb_codepoint_t glyph_id, |
| unsigned int *first_layer /* OUT */, |
| unsigned int *num_layers /* OUT */) const |
| { |
| const BaseGlyphRecord* record; |
| record = (BaseGlyphRecord *) bsearch (&glyph_id, &(this+baseGlyphsZ), numBaseGlyphs, |
| sizeof (BaseGlyphRecord), compare_bgr); |
| if (unlikely (!record)) |
| return false; |
| |
| *first_layer = record->firstLayerIdx; |
| *num_layers = record->numLayers; |
| return true; |
| } |
| |
| inline bool get_layer_record (unsigned int record, |
| hb_codepoint_t *glyph_id /* OUT */, |
| unsigned int *palette_index /* OUT */) const |
| { |
| if (unlikely (record >= numLayers)) |
| { |
| *glyph_id = 0; |
| *palette_index = 0xFFFF; |
| return false; |
| } |
| const LayerRecord &layer = (this+layersZ)[record]; |
| *glyph_id = layer.glyphid; |
| *palette_index = layer.colorIdx; |
| return true; |
| } |
| |
| protected: |
| HBUINT16 version; /* Table version number */ |
| HBUINT16 numBaseGlyphs; /* Number of Base Glyph Records */ |
| LOffsetTo<UnsizedArrayOf<BaseGlyphRecord>, false> |
| baseGlyphsZ; /* Offset to Base Glyph records. */ |
| LOffsetTo<UnsizedArrayOf<LayerRecord>, false> |
| layersZ; /* Offset to Layer Records */ |
| HBUINT16 numLayers; /* Number of Layer Records */ |
| public: |
| DEFINE_SIZE_STATIC (14); |
| }; |
| |
| } /* namespace OT */ |
| |
| |
| #endif /* HB_OT_COLOR_COLR_TABLE_HH */ |