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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-color-cbdt-table.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-color-cbdt-table.hh | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-color-cbdt-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-color-cbdt-table.hh deleted file mode 100644 index 3498d3b360..0000000000 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-color-cbdt-table.hh +++ /dev/null @@ -1,535 +0,0 @@ -/* - * Copyright © 2016 Google, Inc. - * - * 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. - * - * Google Author(s): Seigo Nonaka - */ - -#ifndef HB_OT_COLOR_CBDT_TABLE_HH -#define HB_OT_COLOR_CBDT_TABLE_HH - -#include "hb-open-type.hh" - -/* - * CBLC -- Color Bitmap Location - * https://docs.microsoft.com/en-us/typography/opentype/spec/cblc - * https://docs.microsoft.com/en-us/typography/opentype/spec/eblc - * CBDT -- Color Bitmap Data - * https://docs.microsoft.com/en-us/typography/opentype/spec/cbdt - * https://docs.microsoft.com/en-us/typography/opentype/spec/ebdt - */ -#define HB_OT_TAG_CBLC HB_TAG('C','B','L','C') -#define HB_OT_TAG_CBDT HB_TAG('C','B','D','T') - - -namespace OT { - -struct SmallGlyphMetrics -{ - bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this)); - } - - void get_extents (hb_font_t *font, hb_glyph_extents_t *extents) const - { - extents->x_bearing = font->em_scale_x (bearingX); - extents->y_bearing = font->em_scale_y (bearingY); - extents->width = font->em_scale_x (width); - extents->height = font->em_scale_y (-height); - } - - HBUINT8 height; - HBUINT8 width; - HBINT8 bearingX; - HBINT8 bearingY; - HBUINT8 advance; - public: - DEFINE_SIZE_STATIC(5); -}; - -struct BigGlyphMetrics : SmallGlyphMetrics -{ - HBINT8 vertBearingX; - HBINT8 vertBearingY; - HBUINT8 vertAdvance; - public: - DEFINE_SIZE_STATIC(8); -}; - -struct SBitLineMetrics -{ - bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this)); - } - - HBINT8 ascender; - HBINT8 decender; - HBUINT8 widthMax; - HBINT8 caretSlopeNumerator; - HBINT8 caretSlopeDenominator; - HBINT8 caretOffset; - HBINT8 minOriginSB; - HBINT8 minAdvanceSB; - HBINT8 maxBeforeBL; - HBINT8 minAfterBL; - HBINT8 padding1; - HBINT8 padding2; - public: - DEFINE_SIZE_STATIC(12); -}; - - -/* - * Index Subtables. - */ - -struct IndexSubtableHeader -{ - bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this)); - } - - HBUINT16 indexFormat; - HBUINT16 imageFormat; - HBUINT32 imageDataOffset; - public: - DEFINE_SIZE_STATIC(8); -}; - -template <typename OffsetType> -struct IndexSubtableFormat1Or3 -{ - bool sanitize (hb_sanitize_context_t *c, unsigned int glyph_count) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - offsetArrayZ.sanitize (c, glyph_count + 1)); - } - - bool get_image_data (unsigned int idx, - unsigned int *offset, - unsigned int *length) const - { - if (unlikely (offsetArrayZ[idx + 1] <= offsetArrayZ[idx])) - return false; - - *offset = header.imageDataOffset + offsetArrayZ[idx]; - *length = offsetArrayZ[idx + 1] - offsetArrayZ[idx]; - return true; - } - - IndexSubtableHeader header; - UnsizedArrayOf<Offset<OffsetType>> - offsetArrayZ; - public: - DEFINE_SIZE_ARRAY(8, offsetArrayZ); -}; - -struct IndexSubtableFormat1 : IndexSubtableFormat1Or3<HBUINT32> {}; -struct IndexSubtableFormat3 : IndexSubtableFormat1Or3<HBUINT16> {}; - -struct IndexSubtable -{ - bool sanitize (hb_sanitize_context_t *c, unsigned int glyph_count) const - { - TRACE_SANITIZE (this); - if (!u.header.sanitize (c)) return_trace (false); - switch (u.header.indexFormat) { - case 1: return_trace (u.format1.sanitize (c, glyph_count)); - case 3: return_trace (u.format3.sanitize (c, glyph_count)); - default:return_trace (true); - } - } - - bool get_extents (hb_glyph_extents_t *extents HB_UNUSED) const - { - switch (u.header.indexFormat) { - case 2: case 5: /* TODO */ - case 1: case 3: case 4: /* Variable-metrics formats do not have metrics here. */ - default:return (false); - } - } - - bool get_image_data (unsigned int idx, - unsigned int *offset, - unsigned int *length, - unsigned int *format) const - { - *format = u.header.imageFormat; - switch (u.header.indexFormat) { - case 1: return u.format1.get_image_data (idx, offset, length); - case 3: return u.format3.get_image_data (idx, offset, length); - default: return false; - } - } - - protected: - union { - IndexSubtableHeader header; - IndexSubtableFormat1 format1; - IndexSubtableFormat3 format3; - /* TODO: Format 2, 4, 5. */ - } u; - public: - DEFINE_SIZE_UNION (8, header); -}; - -struct IndexSubtableRecord -{ - bool sanitize (hb_sanitize_context_t *c, const void *base) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - firstGlyphIndex <= lastGlyphIndex && - offsetToSubtable.sanitize (c, base, lastGlyphIndex - firstGlyphIndex + 1)); - } - - bool get_extents (hb_glyph_extents_t *extents, - const void *base) const - { - return (base+offsetToSubtable).get_extents (extents); - } - - bool get_image_data (unsigned int gid, - const void *base, - unsigned int *offset, - unsigned int *length, - unsigned int *format) const - { - if (gid < firstGlyphIndex || gid > lastGlyphIndex) return false; - return (base+offsetToSubtable).get_image_data (gid - firstGlyphIndex, - offset, length, format); - } - - HBGlyphID firstGlyphIndex; - HBGlyphID lastGlyphIndex; - LOffsetTo<IndexSubtable> offsetToSubtable; - public: - DEFINE_SIZE_STATIC(8); -}; - -struct IndexSubtableArray -{ - friend struct CBDT; - - bool sanitize (hb_sanitize_context_t *c, unsigned int count) const - { - TRACE_SANITIZE (this); - return_trace (indexSubtablesZ.sanitize (c, count, this)); - } - - public: - const IndexSubtableRecord* find_table (hb_codepoint_t glyph, unsigned int numTables) const - { - for (unsigned int i = 0; i < numTables; ++i) - { - unsigned int firstGlyphIndex = indexSubtablesZ[i].firstGlyphIndex; - unsigned int lastGlyphIndex = indexSubtablesZ[i].lastGlyphIndex; - if (firstGlyphIndex <= glyph && glyph <= lastGlyphIndex) - return &indexSubtablesZ[i]; - } - return nullptr; - } - - protected: - UnsizedArrayOf<IndexSubtableRecord> indexSubtablesZ; -}; - -struct BitmapSizeTable -{ - friend struct CBLC; - friend struct CBDT; - - bool sanitize (hb_sanitize_context_t *c, const void *base) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - indexSubtableArrayOffset.sanitize (c, base, numberOfIndexSubtables) && - horizontal.sanitize (c) && - vertical.sanitize (c)); - } - - const IndexSubtableRecord *find_table (hb_codepoint_t glyph, - const void *base, - const void **out_base) const - { - *out_base = &(base+indexSubtableArrayOffset); - return (base+indexSubtableArrayOffset).find_table (glyph, numberOfIndexSubtables); - } - - protected: - LNNOffsetTo<IndexSubtableArray> - indexSubtableArrayOffset; - HBUINT32 indexTablesSize; - HBUINT32 numberOfIndexSubtables; - HBUINT32 colorRef; - SBitLineMetrics horizontal; - SBitLineMetrics vertical; - HBGlyphID startGlyphIndex; - HBGlyphID endGlyphIndex; - HBUINT8 ppemX; - HBUINT8 ppemY; - HBUINT8 bitDepth; - HBINT8 flags; - public: - DEFINE_SIZE_STATIC(48); -}; - - -/* - * Glyph Bitmap Data Formats. - */ - -struct GlyphBitmapDataFormat17 -{ - SmallGlyphMetrics glyphMetrics; - LArrayOf<HBUINT8> data; - public: - DEFINE_SIZE_ARRAY(9, data); -}; - -struct GlyphBitmapDataFormat18 -{ - BigGlyphMetrics glyphMetrics; - LArrayOf<HBUINT8> data; - public: - DEFINE_SIZE_ARRAY(12, data); -}; - -struct GlyphBitmapDataFormat19 -{ - LArrayOf<HBUINT8> data; - public: - DEFINE_SIZE_ARRAY(4, data); -}; - -struct CBLC -{ - friend struct CBDT; - - static constexpr hb_tag_t tableTag = HB_OT_TAG_CBLC; - - bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - likely (version.major == 2 || version.major == 3) && - sizeTables.sanitize (c, this)); - } - - protected: - const BitmapSizeTable &choose_strike (hb_font_t *font) const - { - unsigned count = sizeTables.len; - if (unlikely (!count)) - return Null(BitmapSizeTable); - - unsigned int requested_ppem = hb_max (font->x_ppem, font->y_ppem); - if (!requested_ppem) - requested_ppem = 1<<30; /* Choose largest strike. */ - unsigned int best_i = 0; - unsigned int best_ppem = hb_max (sizeTables[0].ppemX, sizeTables[0].ppemY); - - for (unsigned int i = 1; i < count; i++) - { - unsigned int ppem = hb_max (sizeTables[i].ppemX, sizeTables[i].ppemY); - if ((requested_ppem <= ppem && ppem < best_ppem) || - (requested_ppem > best_ppem && ppem > best_ppem)) - { - best_i = i; - best_ppem = ppem; - } - } - - return sizeTables[best_i]; - } - - protected: - FixedVersion<> version; - LArrayOf<BitmapSizeTable> sizeTables; - public: - DEFINE_SIZE_ARRAY(8, sizeTables); -}; - -struct CBDT -{ - static constexpr hb_tag_t tableTag = HB_OT_TAG_CBDT; - - struct accelerator_t - { - void init (hb_face_t *face) - { - cblc = hb_sanitize_context_t().reference_table<CBLC> (face); - cbdt = hb_sanitize_context_t().reference_table<CBDT> (face); - - upem = hb_face_get_upem (face); - } - - void fini () - { - this->cblc.destroy (); - this->cbdt.destroy (); - } - - bool get_extents (hb_font_t *font, hb_codepoint_t glyph, - hb_glyph_extents_t *extents) const - { - const void *base; - const BitmapSizeTable &strike = this->cblc->choose_strike (font); - const IndexSubtableRecord *subtable_record = strike.find_table (glyph, cblc, &base); - if (!subtable_record || !strike.ppemX || !strike.ppemY) - return false; - - if (subtable_record->get_extents (extents, base)) - return true; - - unsigned int image_offset = 0, image_length = 0, image_format = 0; - if (!subtable_record->get_image_data (glyph, base, &image_offset, &image_length, &image_format)) - return false; - - { - unsigned int cbdt_len = cbdt.get_length (); - if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length)) - return false; - - switch (image_format) - { - case 17: { - if (unlikely (image_length < GlyphBitmapDataFormat17::min_size)) - return false; - const GlyphBitmapDataFormat17& glyphFormat17 = - StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset); - glyphFormat17.glyphMetrics.get_extents (font, extents); - break; - } - case 18: { - if (unlikely (image_length < GlyphBitmapDataFormat18::min_size)) - return false; - const GlyphBitmapDataFormat18& glyphFormat18 = - StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset); - glyphFormat18.glyphMetrics.get_extents (font, extents); - break; - } - default: - // TODO: Support other image formats. - return false; - } - } - - /* Convert to font units. */ - float x_scale = upem / (float) strike.ppemX; - float y_scale = upem / (float) strike.ppemY; - extents->x_bearing = roundf (extents->x_bearing * x_scale); - extents->y_bearing = roundf (extents->y_bearing * y_scale); - extents->width = roundf (extents->width * x_scale); - extents->height = roundf (extents->height * y_scale); - - return true; - } - - hb_blob_t* reference_png (hb_font_t *font, - hb_codepoint_t glyph) const - { - const void *base; - const BitmapSizeTable &strike = this->cblc->choose_strike (font); - const IndexSubtableRecord *subtable_record = strike.find_table (glyph, cblc, &base); - if (!subtable_record || !strike.ppemX || !strike.ppemY) - return hb_blob_get_empty (); - - unsigned int image_offset = 0, image_length = 0, image_format = 0; - if (!subtable_record->get_image_data (glyph, base, &image_offset, &image_length, &image_format)) - return hb_blob_get_empty (); - - { - unsigned int cbdt_len = cbdt.get_length (); - if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length)) - return hb_blob_get_empty (); - - switch (image_format) - { - case 17: { - if (unlikely (image_length < GlyphBitmapDataFormat17::min_size)) - return hb_blob_get_empty (); - const GlyphBitmapDataFormat17& glyphFormat17 = - StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset); - return hb_blob_create_sub_blob (cbdt.get_blob (), - image_offset + GlyphBitmapDataFormat17::min_size, - glyphFormat17.data.len); - } - case 18: { - if (unlikely (image_length < GlyphBitmapDataFormat18::min_size)) - return hb_blob_get_empty (); - const GlyphBitmapDataFormat18& glyphFormat18 = - StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset); - return hb_blob_create_sub_blob (cbdt.get_blob (), - image_offset + GlyphBitmapDataFormat18::min_size, - glyphFormat18.data.len); - } - case 19: { - if (unlikely (image_length < GlyphBitmapDataFormat19::min_size)) - return hb_blob_get_empty (); - const GlyphBitmapDataFormat19& glyphFormat19 = - StructAtOffset<GlyphBitmapDataFormat19> (this->cbdt, image_offset); - return hb_blob_create_sub_blob (cbdt.get_blob (), - image_offset + GlyphBitmapDataFormat19::min_size, - glyphFormat19.data.len); - } - } - } - - return hb_blob_get_empty (); - } - - bool has_data () const { return cbdt.get_length (); } - - private: - hb_blob_ptr_t<CBLC> cblc; - hb_blob_ptr_t<CBDT> cbdt; - - unsigned int upem; - }; - - bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (c->check_struct (this) && - likely (version.major == 2 || version.major == 3)); - } - - protected: - FixedVersion<> version; - UnsizedArrayOf<HBUINT8> dataZ; - public: - DEFINE_SIZE_ARRAY(4, dataZ); -}; - -struct CBDT_accelerator_t : CBDT::accelerator_t {}; - -} /* namespace OT */ - -#endif /* HB_OT_COLOR_CBDT_TABLE_HH */ |