Nikolay Sivov : dwrite: Implement cursive attachment, GPOS lookup 3.
Module: wine Branch: master Commit: d1642df049cb17ade2b5458974fd040090a0ba51 URL: https://source.winehq.org/git/wine.git/?a=commit;h=d1642df049cb17ade2b545897... Author: Nikolay Sivov <nsivov(a)codeweavers.com> Date: Fri Feb 1 13:48:11 2019 +0300 dwrite: Implement cursive attachment, GPOS lookup 3. Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com> Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- dlls/dwrite/analyzer.c | 2 + dlls/dwrite/dwrite_private.h | 1 + dlls/dwrite/opentype.c | 185 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 188 insertions(+) diff --git a/dlls/dwrite/analyzer.c b/dlls/dwrite/analyzer.c index 1fc8f98..0d8305d 100644 --- a/dlls/dwrite/analyzer.c +++ b/dlls/dwrite/analyzer.c @@ -1317,6 +1317,7 @@ static HRESULT WINAPI dwritetextanalyzer_GetGlyphPlacements(IDWriteTextAnalyzer2 context.u.pos.glyph_props = glyph_props; context.glyph_count = glyph_count; context.emsize = emSize; + context.measuring_mode = DWRITE_MEASURING_MODE_NATURAL; context.advances = advances; context.offsets = offsets; context.language_tag = get_opentype_language(locale); @@ -1381,6 +1382,7 @@ static HRESULT WINAPI dwritetextanalyzer_GetGdiCompatibleGlyphPlacements(IDWrite context.u.pos.glyph_props = glyph_props; context.glyph_count = glyph_count; context.emsize = emSize * ppdip; + context.measuring_mode = measuring_mode; context.advances = advances; context.offsets = offsets; context.language_tag = get_opentype_language(locale); diff --git a/dlls/dwrite/dwrite_private.h b/dlls/dwrite/dwrite_private.h index 355a826..0451a7e 100644 --- a/dlls/dwrite/dwrite_private.h +++ b/dlls/dwrite/dwrite_private.h @@ -394,6 +394,7 @@ struct scriptshaping_context unsigned int glyph_count; float emsize; + DWRITE_MEASURING_MODE measuring_mode; float *advances; DWRITE_GLYPH_OFFSET *offsets; }; diff --git a/dlls/dwrite/opentype.c b/dlls/dwrite/opentype.c index f3c2043..e9c755e 100644 --- a/dlls/dwrite/opentype.c +++ b/dlls/dwrite/opentype.c @@ -621,6 +621,38 @@ struct ot_gpos_pairpos_format2 WORD values[1]; }; +struct ot_gpos_anchor_format1 +{ + WORD format; + short x_coord; + short y_coord; +}; + +struct ot_gpos_anchor_format2 +{ + WORD format; + short x_coord; + short y_coord; + WORD anchor_point; +}; + +struct ot_gpos_anchor_format3 +{ + WORD format; + short x_coord; + short y_coord; + WORD x_dev_offset; + WORD y_dev_offset; +}; + +struct ot_gpos_cursive_format1 +{ + WORD format; + WORD coverage; + WORD count; + WORD anchors[1]; +}; + typedef struct { WORD SubstFormat; WORD Coverage; @@ -2979,6 +3011,24 @@ static BOOL glyph_iterator_next(struct glyph_iterator *iter) return FALSE; } +static BOOL glyph_iterator_prev(struct glyph_iterator *iter) +{ + if (!iter->pos) + return FALSE; + + while (iter->pos > iter->len - 1) + { + --iter->pos; + if (glyph_iterator_match(iter)) + { + --iter->len; + return TRUE; + } + } + + return FALSE; +} + static BOOL opentype_layout_apply_gpos_single_adjustment(struct scriptshaping_context *context, struct glyph_iterator *iter, const struct lookup *lookup) { @@ -3192,9 +3242,144 @@ static BOOL opentype_layout_apply_gpos_pair_adjustment(struct scriptshaping_cont return FALSE; } +static void opentype_layout_gpos_get_anchor(const struct scriptshaping_context *context, unsigned int anchor_offset, + unsigned int glyph_index, float *x, float *y) +{ + const struct scriptshaping_cache *cache = context->cache; + + WORD format = table_read_be_word(&cache->gpos.table, anchor_offset); + + *x = *y = 0.0f; + + if (format == 1) + { + const struct ot_gpos_anchor_format1 *format1 = table_read_ensure(&cache->gpos.table, anchor_offset, + sizeof(*format1)); + + if (format1) + { + *x = opentype_scale_gpos_be_value(format1->x_coord, context->emsize, cache->upem); + *y = opentype_scale_gpos_be_value(format1->y_coord, context->emsize, cache->upem); + } + } + else if (format == 2) + { + const struct ot_gpos_anchor_format2 *format2 = table_read_ensure(&cache->gpos.table, anchor_offset, + sizeof(*format2)); + + if (format2) + { + if (context->measuring_mode != DWRITE_MEASURING_MODE_NATURAL) + FIXME("Use outline anchor point for glyph %u.\n", context->u.pos.glyphs[glyph_index]); + + *x = opentype_scale_gpos_be_value(format2->x_coord, context->emsize, cache->upem); + *y = opentype_scale_gpos_be_value(format2->y_coord, context->emsize, cache->upem); + } + } + else if (format == 3) + { + const struct ot_gpos_anchor_format3 *format3 = table_read_ensure(&cache->gpos.table, anchor_offset, + sizeof(*format3)); + + if (format3) + { + *x = opentype_scale_gpos_be_value(format3->x_coord, context->emsize, cache->upem); + *y = opentype_scale_gpos_be_value(format3->y_coord, context->emsize, cache->upem); + + if (context->measuring_mode != DWRITE_MEASURING_MODE_NATURAL) + { + if (format3->x_dev_offset) + *x += opentype_layout_gpos_get_dev_value(context, anchor_offset + GET_BE_WORD(format3->x_dev_offset)); + if (format3->y_dev_offset) + *y += opentype_layout_gpos_get_dev_value(context, anchor_offset + GET_BE_WORD(format3->y_dev_offset)); + } + } + } + else + WARN("Unknown anchor format %u.\n", format); +} + static BOOL opentype_layout_apply_gpos_cursive_attachment(struct scriptshaping_context *context, struct glyph_iterator *iter, const struct lookup *lookup) { + struct scriptshaping_cache *cache = context->cache; + unsigned int i; + + for (i = 0; i < lookup->subtable_count; ++i) + { + unsigned int subtable_offset = opentype_layout_get_gpos_subtable(cache, lookup->offset, i); + WORD format; + + format = table_read_be_word(&cache->gpos.table, subtable_offset); + + if (format == 1) + { + WORD coverage_offset = table_read_be_word(&cache->gpos.table, subtable_offset + + FIELD_OFFSET(struct ot_gpos_cursive_format1, coverage)); + unsigned int glyph_index, entry_count, entry_anchor, exit_anchor; + float entry_x, entry_y, exit_x, exit_y, delta; + struct glyph_iterator prev_iter; + + if (!coverage_offset) + continue; + + entry_count = table_read_be_word(&cache->gpos.table, subtable_offset + + FIELD_OFFSET(struct ot_gpos_cursive_format1, count)); + + glyph_index = opentype_layout_is_glyph_covered(&cache->gpos.table, subtable_offset + + coverage_offset, context->u.pos.glyphs[iter->pos]); + if (glyph_index == GLYPH_NOT_COVERED || glyph_index >= entry_count) + continue; + + entry_anchor = table_read_be_word(&cache->gpos.table, subtable_offset + + FIELD_OFFSET(struct ot_gpos_cursive_format1, anchors[glyph_index * 2])); + if (!entry_anchor) + continue; + + glyph_iterator_init(context, iter->flags, iter->pos, 1, &prev_iter); + if (!glyph_iterator_prev(&prev_iter)) + continue; + + glyph_index = opentype_layout_is_glyph_covered(&cache->gpos.table, subtable_offset + + coverage_offset, context->u.pos.glyphs[prev_iter.pos]); + if (glyph_index == GLYPH_NOT_COVERED || glyph_index >= entry_count) + continue; + + exit_anchor = table_read_be_word(&cache->gpos.table, subtable_offset + + FIELD_OFFSET(struct ot_gpos_cursive_format1, anchors[glyph_index * 2 + 1])); + if (!exit_anchor) + continue; + + opentype_layout_gpos_get_anchor(context, subtable_offset + exit_anchor, prev_iter.pos, &exit_x, &exit_y); + opentype_layout_gpos_get_anchor(context, subtable_offset + entry_anchor, iter->pos, &entry_x, &entry_y); + + if (context->is_rtl) + { + delta = exit_x + context->offsets[prev_iter.pos].advanceOffset; + context->advances[prev_iter.pos] -= delta; + context->advances[iter->pos] = entry_x + context->offsets[iter->pos].advanceOffset; + context->offsets[prev_iter.pos].advanceOffset -= delta; + } + else + { + delta = entry_x + context->offsets[iter->pos].advanceOffset; + context->advances[prev_iter.pos] = exit_x + context->offsets[prev_iter.pos].advanceOffset; + context->advances[iter->pos] -= delta; + context->offsets[iter->pos].advanceOffset -= delta; + } + + if (lookup->flags & LOOKUP_FLAG_RTL) + context->offsets[prev_iter.pos].ascenderOffset = entry_y - exit_y; + else + context->offsets[iter->pos].ascenderOffset = exit_y - entry_y; + + break; + } + else + WARN("Unknown cursive attachment format %u.\n", format); + + } + return FALSE; }
participants (1)
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Alexandre Julliard