diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/OT/Var/VARC')
| -rw-r--r-- | thirdparty/harfbuzz/src/OT/Var/VARC/VARC.cc | 346 | ||||
| -rw-r--r-- | thirdparty/harfbuzz/src/OT/Var/VARC/VARC.hh | 193 | ||||
| -rw-r--r-- | thirdparty/harfbuzz/src/OT/Var/VARC/coord-setter.hh | 37 |
3 files changed, 576 insertions, 0 deletions
diff --git a/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.cc b/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.cc new file mode 100644 index 0000000000..1afb571113 --- /dev/null +++ b/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.cc @@ -0,0 +1,346 @@ +#include "VARC.hh" + +#ifndef HB_NO_VAR_COMPOSITES + +#include "../../../hb-draw.hh" +#include "../../../hb-geometry.hh" +#include "../../../hb-ot-layout-common.hh" +#include "../../../hb-ot-layout-gdef-table.hh" + +namespace OT { + +//namespace Var { + + +struct hb_transforming_pen_context_t +{ + hb_transform_t transform; + hb_draw_funcs_t *dfuncs; + void *data; + hb_draw_state_t *st; +}; + +static void +hb_transforming_pen_move_to (hb_draw_funcs_t *dfuncs HB_UNUSED, + void *data, + hb_draw_state_t *st, + float to_x, float to_y, + void *user_data HB_UNUSED) +{ + hb_transforming_pen_context_t *c = (hb_transforming_pen_context_t *) data; + + c->transform.transform_point (to_x, to_y); + + c->dfuncs->move_to (c->data, *c->st, to_x, to_y); +} + +static void +hb_transforming_pen_line_to (hb_draw_funcs_t *dfuncs HB_UNUSED, + void *data, + hb_draw_state_t *st, + float to_x, float to_y, + void *user_data HB_UNUSED) +{ + hb_transforming_pen_context_t *c = (hb_transforming_pen_context_t *) data; + + c->transform.transform_point (to_x, to_y); + + c->dfuncs->line_to (c->data, *c->st, to_x, to_y); +} + +static void +hb_transforming_pen_quadratic_to (hb_draw_funcs_t *dfuncs HB_UNUSED, + void *data, + hb_draw_state_t *st, + float control_x, float control_y, + float to_x, float to_y, + void *user_data HB_UNUSED) +{ + hb_transforming_pen_context_t *c = (hb_transforming_pen_context_t *) data; + + c->transform.transform_point (control_x, control_y); + c->transform.transform_point (to_x, to_y); + + c->dfuncs->quadratic_to (c->data, *c->st, control_x, control_y, to_x, to_y); +} + +static void +hb_transforming_pen_cubic_to (hb_draw_funcs_t *dfuncs HB_UNUSED, + void *data, + hb_draw_state_t *st, + float control1_x, float control1_y, + float control2_x, float control2_y, + float to_x, float to_y, + void *user_data HB_UNUSED) +{ + hb_transforming_pen_context_t *c = (hb_transforming_pen_context_t *) data; + + c->transform.transform_point (control1_x, control1_y); + c->transform.transform_point (control2_x, control2_y); + c->transform.transform_point (to_x, to_y); + + c->dfuncs->cubic_to (c->data, *c->st, control1_x, control1_y, control2_x, control2_y, to_x, to_y); +} + +static void +hb_transforming_pen_close_path (hb_draw_funcs_t *dfuncs HB_UNUSED, + void *data, + hb_draw_state_t *st, + void *user_data HB_UNUSED) +{ + hb_transforming_pen_context_t *c = (hb_transforming_pen_context_t *) data; + + c->dfuncs->close_path (c->data, *c->st); +} + +static inline void free_static_transforming_pen_funcs (); + +static struct hb_transforming_pen_funcs_lazy_loader_t : hb_draw_funcs_lazy_loader_t<hb_transforming_pen_funcs_lazy_loader_t> +{ + static hb_draw_funcs_t *create () + { + hb_draw_funcs_t *funcs = hb_draw_funcs_create (); + + hb_draw_funcs_set_move_to_func (funcs, hb_transforming_pen_move_to, nullptr, nullptr); + hb_draw_funcs_set_line_to_func (funcs, hb_transforming_pen_line_to, nullptr, nullptr); + hb_draw_funcs_set_quadratic_to_func (funcs, hb_transforming_pen_quadratic_to, nullptr, nullptr); + hb_draw_funcs_set_cubic_to_func (funcs, hb_transforming_pen_cubic_to, nullptr, nullptr); + hb_draw_funcs_set_close_path_func (funcs, hb_transforming_pen_close_path, nullptr, nullptr); + + hb_draw_funcs_make_immutable (funcs); + + hb_atexit (free_static_transforming_pen_funcs); + + return funcs; + } +} static_transforming_pen_funcs; + +static inline +void free_static_transforming_pen_funcs () +{ + static_transforming_pen_funcs.free_instance (); +} + +static hb_draw_funcs_t * +hb_transforming_pen_get_funcs () +{ + return static_transforming_pen_funcs.get_unconst (); +} + + +hb_ubytes_t +VarComponent::get_path_at (hb_font_t *font, + hb_codepoint_t parent_gid, + hb_draw_session_t &draw_session, + hb_array_t<const int> coords, + hb_ubytes_t total_record, + hb_set_t *visited, + signed *edges_left, + signed depth_left, + VarRegionList::cache_t *cache) const +{ + const unsigned char *end = total_record.arrayZ + total_record.length; + const unsigned char *record = total_record.arrayZ; + + auto &VARC = *font->face->table.VARC; + auto &varStore = &VARC+VARC.varStore; + auto instancer = MultiItemVarStoreInstancer(&varStore, nullptr, coords, cache); + +#define READ_UINT32VAR(name) \ + HB_STMT_START { \ + if (unlikely (unsigned (end - record) < HBUINT32VAR::min_size)) return hb_ubytes_t (); \ + hb_barrier (); \ + auto &varint = * (const HBUINT32VAR *) record; \ + unsigned size = varint.get_size (); \ + if (unlikely (unsigned (end - record) < size)) return hb_ubytes_t (); \ + name = (uint32_t) varint; \ + record += size; \ + } HB_STMT_END + + uint32_t flags; + READ_UINT32VAR (flags); + + // gid + + hb_codepoint_t gid = 0; + if (flags & (unsigned) flags_t::GID_IS_24BIT) + { + if (unlikely (unsigned (end - record) < HBGlyphID24::static_size)) + return hb_ubytes_t (); + hb_barrier (); + gid = * (const HBGlyphID24 *) record; + record += HBGlyphID24::static_size; + } + else + { + if (unlikely (unsigned (end - record) < HBGlyphID16::static_size)) + return hb_ubytes_t (); + hb_barrier (); + gid = * (const HBGlyphID16 *) record; + record += HBGlyphID16::static_size; + } + + // Condition + bool show = true; + if (flags & (unsigned) flags_t::HAVE_CONDITION) + { + unsigned conditionIndex; + READ_UINT32VAR (conditionIndex); + const auto &condition = (&VARC+VARC.conditionList)[conditionIndex]; + show = condition.evaluate (coords.arrayZ, coords.length, &instancer); + } + + // Axis values + + hb_vector_t<unsigned> axisIndices; + hb_vector_t<float> axisValues; + if (flags & (unsigned) flags_t::HAVE_AXES) + { + unsigned axisIndicesIndex; + READ_UINT32VAR (axisIndicesIndex); + axisIndices = (&VARC+VARC.axisIndicesList)[axisIndicesIndex]; + axisValues.resize (axisIndices.length); + const HBUINT8 *p = (const HBUINT8 *) record; + TupleValues::decompile (p, axisValues, (const HBUINT8 *) end); + record += (const unsigned char *) p - record; + } + + // Apply variations if any + if (flags & (unsigned) flags_t::AXIS_VALUES_HAVE_VARIATION) + { + uint32_t axisValuesVarIdx; + READ_UINT32VAR (axisValuesVarIdx); + if (show && coords && !axisValues.in_error ()) + varStore.get_delta (axisValuesVarIdx, coords, axisValues.as_array (), cache); + } + + auto component_coords = coords; + /* Copying coords is expensive; so we have put an arbitrary + * limit on the max number of coords for now. */ + if ((flags & (unsigned) flags_t::RESET_UNSPECIFIED_AXES) || + coords.length > HB_VAR_COMPOSITE_MAX_AXES) + component_coords = hb_array<int> (font->coords, font->num_coords); + + // Transform + + uint32_t transformVarIdx = VarIdx::NO_VARIATION; + if (flags & (unsigned) flags_t::TRANSFORM_HAS_VARIATION) + READ_UINT32VAR (transformVarIdx); + +#define PROCESS_TRANSFORM_COMPONENTS \ + HB_STMT_START { \ + PROCESS_TRANSFORM_COMPONENT (FWORD, HAVE_TRANSLATE_X, translateX); \ + PROCESS_TRANSFORM_COMPONENT (FWORD, HAVE_TRANSLATE_Y, translateY); \ + PROCESS_TRANSFORM_COMPONENT (F4DOT12, HAVE_ROTATION, rotation); \ + PROCESS_TRANSFORM_COMPONENT (F6DOT10, HAVE_SCALE_X, scaleX); \ + PROCESS_TRANSFORM_COMPONENT (F6DOT10, HAVE_SCALE_Y, scaleY); \ + PROCESS_TRANSFORM_COMPONENT (F4DOT12, HAVE_SKEW_X, skewX); \ + PROCESS_TRANSFORM_COMPONENT (F4DOT12, HAVE_SKEW_Y, skewY); \ + PROCESS_TRANSFORM_COMPONENT (FWORD, HAVE_TCENTER_X, tCenterX); \ + PROCESS_TRANSFORM_COMPONENT (FWORD, HAVE_TCENTER_Y, tCenterY); \ + } HB_STMT_END + + hb_transform_decomposed_t transform; + + // Read transform components +#define PROCESS_TRANSFORM_COMPONENT(type, flag, name) \ + if (flags & (unsigned) flags_t::flag) \ + { \ + static_assert (type::static_size == HBINT16::static_size, ""); \ + if (unlikely (unsigned (end - record) < HBINT16::static_size)) \ + return hb_ubytes_t (); \ + hb_barrier (); \ + transform.name = * (const HBINT16 *) record; \ + record += HBINT16::static_size; \ + } + PROCESS_TRANSFORM_COMPONENTS; +#undef PROCESS_TRANSFORM_COMPONENT + + // Read reserved records + unsigned i = flags & (unsigned) flags_t::RESERVED_MASK; + while (i) + { + HB_UNUSED uint32_t discard; + READ_UINT32VAR (discard); + i &= i - 1; + } + + /* Parsing is over now. */ + + if (show) + { + // Only use coord_setter if there's actually any axis overrides. + coord_setter_t coord_setter (axisIndices ? component_coords : hb_array<int> ()); + // Go backwards, to reduce coord_setter vector reallocations. + for (unsigned i = axisIndices.length; i; i--) + coord_setter[axisIndices[i - 1]] = axisValues[i - 1]; + if (axisIndices) + component_coords = coord_setter.get_coords (); + + // Apply transform variations if any + if (transformVarIdx != VarIdx::NO_VARIATION && coords) + { + float transformValues[9]; + unsigned numTransformValues = 0; +#define PROCESS_TRANSFORM_COMPONENT(type, flag, name) \ + if (flags & (unsigned) flags_t::flag) \ + transformValues[numTransformValues++] = transform.name; + PROCESS_TRANSFORM_COMPONENTS; +#undef PROCESS_TRANSFORM_COMPONENT + varStore.get_delta (transformVarIdx, coords, hb_array (transformValues, numTransformValues), cache); + numTransformValues = 0; +#define PROCESS_TRANSFORM_COMPONENT(type, flag, name) \ + if (flags & (unsigned) flags_t::flag) \ + transform.name = transformValues[numTransformValues++]; + PROCESS_TRANSFORM_COMPONENTS; +#undef PROCESS_TRANSFORM_COMPONENT + } + + // Divide them by their divisors +#define PROCESS_TRANSFORM_COMPONENT(type, flag, name) \ + if (flags & (unsigned) flags_t::flag) \ + { \ + HBINT16 int_v; \ + int_v = roundf (transform.name); \ + type typed_v = * (const type *) &int_v; \ + float float_v = (float) typed_v; \ + transform.name = float_v; \ + } + PROCESS_TRANSFORM_COMPONENTS; +#undef PROCESS_TRANSFORM_COMPONENT + + if (!(flags & (unsigned) flags_t::HAVE_SCALE_Y)) + transform.scaleY = transform.scaleX; + + // Scale the transform by the font's scale + float x_scale = font->x_multf; + float y_scale = font->y_multf; + transform.translateX *= x_scale; + transform.translateY *= y_scale; + transform.tCenterX *= x_scale; + transform.tCenterY *= y_scale; + + // Build a transforming pen to apply the transform. + hb_draw_funcs_t *transformer_funcs = hb_transforming_pen_get_funcs (); + hb_transforming_pen_context_t context {transform.to_transform (), + draw_session.funcs, + draw_session.draw_data, + &draw_session.st}; + hb_draw_session_t transformer_session {transformer_funcs, &context}; + + VARC.get_path_at (font, gid, + transformer_session, component_coords, + parent_gid, + visited, edges_left, depth_left - 1); + } + +#undef PROCESS_TRANSFORM_COMPONENTS +#undef READ_UINT32VAR + + return hb_ubytes_t (record, end - record); +} + +//} // namespace Var +} // namespace OT + +#endif diff --git a/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.hh b/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.hh new file mode 100644 index 0000000000..d60f7b0c28 --- /dev/null +++ b/thirdparty/harfbuzz/src/OT/Var/VARC/VARC.hh @@ -0,0 +1,193 @@ +#ifndef OT_VAR_VARC_VARC_HH +#define OT_VAR_VARC_VARC_HH + +#include "../../../hb-ot-layout-common.hh" +#include "../../../hb-ot-glyf-table.hh" +#include "../../../hb-ot-cff2-table.hh" +#include "../../../hb-ot-cff1-table.hh" + +#include "coord-setter.hh" + +namespace OT { + +//namespace Var { + +/* + * VARC -- Variable Composites + * https://github.com/harfbuzz/boring-expansion-spec/blob/main/VARC.md + */ + +#ifndef HB_NO_VAR_COMPOSITES + +struct VarComponent +{ + enum class flags_t : uint32_t + { + RESET_UNSPECIFIED_AXES = 1u << 0, + HAVE_AXES = 1u << 1, + AXIS_VALUES_HAVE_VARIATION = 1u << 2, + TRANSFORM_HAS_VARIATION = 1u << 3, + HAVE_TRANSLATE_X = 1u << 4, + HAVE_TRANSLATE_Y = 1u << 5, + HAVE_ROTATION = 1u << 6, + HAVE_CONDITION = 1u << 7, + HAVE_SCALE_X = 1u << 8, + HAVE_SCALE_Y = 1u << 9, + HAVE_TCENTER_X = 1u << 10, + HAVE_TCENTER_Y = 1u << 11, + GID_IS_24BIT = 1u << 12, + HAVE_SKEW_X = 1u << 13, + HAVE_SKEW_Y = 1u << 14, + RESERVED_MASK = ~((1u << 15) - 1), + }; + + HB_INTERNAL hb_ubytes_t + get_path_at (hb_font_t *font, + hb_codepoint_t parent_gid, + hb_draw_session_t &draw_session, + hb_array_t<const int> coords, + hb_ubytes_t record, + hb_set_t *visited, + signed *edges_left, + signed depth_left, + VarRegionList::cache_t *cache = nullptr) const; +}; + +struct VarCompositeGlyph +{ + static void + get_path_at (hb_font_t *font, + hb_codepoint_t glyph, + hb_draw_session_t &draw_session, + hb_array_t<const int> coords, + hb_ubytes_t record, + hb_set_t *visited, + signed *edges_left, + signed depth_left, + VarRegionList::cache_t *cache = nullptr) + { + while (record) + { + const VarComponent &comp = * (const VarComponent *) (record.arrayZ); + record = comp.get_path_at (font, glyph, + draw_session, coords, + record, + visited, edges_left, depth_left, cache); + } + } +}; + +HB_MARK_AS_FLAG_T (VarComponent::flags_t); + +struct VARC +{ + friend struct VarComponent; + + static constexpr hb_tag_t tableTag = HB_TAG ('V', 'A', 'R', 'C'); + + bool + get_path_at (hb_font_t *font, + hb_codepoint_t glyph, + hb_draw_session_t &draw_session, + hb_array_t<const int> coords, + hb_codepoint_t parent_glyph = HB_CODEPOINT_INVALID, + hb_set_t *visited = nullptr, + signed *edges_left = nullptr, + signed depth_left = HB_MAX_NESTING_LEVEL) const + { + hb_set_t stack_set; + if (visited == nullptr) + visited = &stack_set; + signed stack_edges = HB_MAX_GRAPH_EDGE_COUNT; + if (edges_left == nullptr) + edges_left = &stack_edges; + + // Don't recurse on the same glyph. + unsigned idx = glyph == parent_glyph ? + NOT_COVERED : + (this+coverage).get_coverage (glyph); + if (idx == NOT_COVERED) + { + if (!font->face->table.glyf->get_path_at (font, glyph, draw_session, coords)) +#ifndef HB_NO_CFF + if (!font->face->table.cff2->get_path_at (font, glyph, draw_session, coords)) + if (!font->face->table.cff1->get_path (font, glyph, draw_session)) // Doesn't have variations +#endif + return false; + return true; + } + + if (depth_left <= 0) + return true; + + if (*edges_left <= 0) + return true; + (*edges_left)--; + + if (visited->has (glyph) || visited->in_error ()) + return true; + visited->add (glyph); + + hb_ubytes_t record = (this+glyphRecords)[idx]; + + VarRegionList::cache_t *cache = record.length >= 64 ? // Heuristic + (this+varStore).create_cache () + : nullptr; + + VarCompositeGlyph::get_path_at (font, glyph, + draw_session, coords, + record, + visited, edges_left, depth_left, + cache); + + (this+varStore).destroy_cache (cache); + + visited->del (glyph); + + return true; + } + + bool + get_path (hb_font_t *font, hb_codepoint_t gid, hb_draw_session_t &draw_session) const + { return get_path_at (font, gid, draw_session, hb_array (font->coords, font->num_coords)); } + + bool paint_glyph (hb_font_t *font, hb_codepoint_t gid, hb_paint_funcs_t *funcs, void *data, hb_color_t foreground) const + { + funcs->push_clip_glyph (data, gid, font); + funcs->color (data, true, foreground); + funcs->pop_clip (data); + + return true; + } + + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (version.sanitize (c) && + hb_barrier () && + version.major == 1 && + coverage.sanitize (c, this) && + varStore.sanitize (c, this) && + conditionList.sanitize (c, this) && + axisIndicesList.sanitize (c, this) && + glyphRecords.sanitize (c, this)); + } + + protected: + FixedVersion<> version; /* Version identifier */ + Offset32To<Coverage> coverage; + Offset32To<MultiItemVariationStore> varStore; + Offset32To<ConditionList> conditionList; + Offset32To<TupleList> axisIndicesList; + Offset32To<CFF2Index/*Of<VarCompositeGlyph>*/> glyphRecords; + public: + DEFINE_SIZE_STATIC (24); +}; + +#endif + +//} + +} + +#endif /* OT_VAR_VARC_VARC_HH */ diff --git a/thirdparty/harfbuzz/src/OT/Var/VARC/coord-setter.hh b/thirdparty/harfbuzz/src/OT/Var/VARC/coord-setter.hh new file mode 100644 index 0000000000..a2b483ce25 --- /dev/null +++ b/thirdparty/harfbuzz/src/OT/Var/VARC/coord-setter.hh @@ -0,0 +1,37 @@ +#ifndef OT_VAR_VARC_COORD_SETTER_HH +#define OT_VAR_VARC_COORD_SETTER_HH + + +#include "../../../hb.hh" + + +namespace OT { +//namespace Var { + + +struct coord_setter_t +{ + coord_setter_t (hb_array_t<const int> coords) : + coords (coords) {} + + int& operator [] (unsigned idx) + { + if (unlikely (idx >= HB_VAR_COMPOSITE_MAX_AXES)) + return Crap(int); + if (coords.length < idx + 1) + coords.resize (idx + 1); + return coords[idx]; + } + + hb_array_t<int> get_coords () + { return coords.as_array (); } + + hb_vector_t<int> coords; +}; + + +//} // namespace Var + +} // namespace OT + +#endif /* OT_VAR_VARC_COORD_SETTER_HH */ |