[ot] Move hb_ot_face_glyf_accelerator_t
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Behdad Esfahbod
parent
c4e18e54dc
commit
7e2839c438
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@ -144,79 +144,6 @@ struct hb_ot_face_metrics_accelerator_t
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}
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};
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struct hb_ot_face_glyf_accelerator_t
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{
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bool short_offset;
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unsigned int num_glyphs;
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const OT::loca *loca;
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const OT::glyf *glyf;
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hb_blob_t *loca_blob;
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hb_blob_t *glyf_blob;
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unsigned int glyf_len;
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inline void init (hb_face_t *face)
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{
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hb_blob_t *head_blob = OT::Sanitizer<OT::head>::sanitize (face->reference_table (HB_OT_TAG_head));
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const OT::head *head = OT::Sanitizer<OT::head>::lock_instance (head_blob);
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if ((unsigned int) head->indexToLocFormat > 1 || head->glyphDataFormat != 0)
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{
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/* Unknown format. Leave num_glyphs=0, that takes care of disabling us. */
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hb_blob_destroy (head_blob);
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return;
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}
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this->short_offset = 0 == head->indexToLocFormat;
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hb_blob_destroy (head_blob);
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this->loca_blob = OT::Sanitizer<OT::loca>::sanitize (face->reference_table (HB_OT_TAG_loca));
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this->loca = OT::Sanitizer<OT::loca>::lock_instance (this->loca_blob);
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this->glyf_blob = OT::Sanitizer<OT::glyf>::sanitize (face->reference_table (HB_OT_TAG_glyf));
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this->glyf = OT::Sanitizer<OT::glyf>::lock_instance (this->glyf_blob);
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this->num_glyphs = MAX (1u, hb_blob_get_length (this->loca_blob) / (this->short_offset ? 2 : 4)) - 1;
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this->glyf_len = hb_blob_get_length (this->glyf_blob);
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}
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inline void fini (void)
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{
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hb_blob_destroy (this->loca_blob);
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hb_blob_destroy (this->glyf_blob);
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}
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inline bool get_extents (hb_codepoint_t glyph,
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hb_glyph_extents_t *extents) const
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{
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if (unlikely (glyph >= this->num_glyphs))
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return false;
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unsigned int start_offset, end_offset;
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if (this->short_offset)
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{
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start_offset = 2 * this->loca->u.shortsZ[glyph];
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end_offset = 2 * this->loca->u.shortsZ[glyph + 1];
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}
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else
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{
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start_offset = this->loca->u.longsZ[glyph];
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end_offset = this->loca->u.longsZ[glyph + 1];
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}
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if (start_offset > end_offset || end_offset > this->glyf_len)
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return false;
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if (end_offset - start_offset < OT::glyfGlyphHeader::static_size)
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return true; /* Empty glyph; zero extents. */
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const OT::glyfGlyphHeader &glyph_header = OT::StructAtOffset<OT::glyfGlyphHeader> (this->glyf, start_offset);
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extents->x_bearing = MIN (glyph_header.xMin, glyph_header.xMax);
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extents->y_bearing = MAX (glyph_header.yMin, glyph_header.yMax);
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extents->width = MAX (glyph_header.xMin, glyph_header.xMax) - extents->x_bearing;
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extents->height = MIN (glyph_header.yMin, glyph_header.yMax) - extents->y_bearing;
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return true;
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}
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};
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typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph);
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@ -350,7 +277,7 @@ struct hb_ot_font_t
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hb_ot_face_cmap_accelerator_t cmap;
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hb_ot_face_metrics_accelerator_t h_metrics;
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hb_ot_face_metrics_accelerator_t v_metrics;
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OT::hb_lazy_loader_t<hb_ot_face_glyf_accelerator_t> glyf;
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OT::hb_lazy_loader_t<OT::glyf::accelerator_t> glyf;
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OT::hb_lazy_loader_t<OT::CBDT::accelerator_t> cbdt;
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OT::hb_lazy_loader_t<OT::post::accelerator_t> post;
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OT::hb_lazy_loader_t<OT::kern::accelerator_t> kern;
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@ -28,6 +28,7 @@
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#define HB_OT_GLYF_TABLE_HH
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#include "hb-open-type-private.hh"
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#include "hb-ot-head-table.hh"
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namespace OT {
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@ -78,26 +79,100 @@ struct glyf
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return_trace (true);
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}
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struct GlyphHeader
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{
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SHORT numberOfContours; /* If the number of contours is
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* greater than or equal to zero,
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* this is a simple glyph; if negative,
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* this is a composite glyph. */
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FWORD xMin; /* Minimum x for coordinate data. */
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FWORD yMin; /* Minimum y for coordinate data. */
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FWORD xMax; /* Maximum x for coordinate data. */
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FWORD yMax; /* Maximum y for coordinate data. */
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DEFINE_SIZE_STATIC (10);
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};
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struct accelerator_t
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{
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inline void init (hb_face_t *face)
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{
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hb_blob_t *head_blob = Sanitizer<head>::sanitize (face->reference_table (HB_OT_TAG_head));
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const head *head_table = Sanitizer<head>::lock_instance (head_blob);
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if ((unsigned int) head_table->indexToLocFormat > 1 || head_table->glyphDataFormat != 0)
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{
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/* Unknown format. Leave num_glyphs=0, that takes care of disabling us. */
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hb_blob_destroy (head_blob);
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return;
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}
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short_offset = 0 == head_table->indexToLocFormat;
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hb_blob_destroy (head_blob);
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loca_blob = Sanitizer<loca>::sanitize (face->reference_table (HB_OT_TAG_loca));
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loca_table = Sanitizer<loca>::lock_instance (loca_blob);
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glyf_blob = Sanitizer<glyf>::sanitize (face->reference_table (HB_OT_TAG_glyf));
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glyf_table = Sanitizer<glyf>::lock_instance (glyf_blob);
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num_glyphs = MAX (1u, hb_blob_get_length (loca_blob) / (short_offset ? 2 : 4)) - 1;
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glyf_len = hb_blob_get_length (glyf_blob);
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}
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inline void fini (void)
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{
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hb_blob_destroy (loca_blob);
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hb_blob_destroy (glyf_blob);
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}
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inline bool get_extents (hb_codepoint_t glyph,
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hb_glyph_extents_t *extents) const
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{
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if (unlikely (glyph >= num_glyphs))
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return false;
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unsigned int start_offset, end_offset;
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if (short_offset)
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{
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start_offset = 2 * loca_table->u.shortsZ[glyph];
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end_offset = 2 * loca_table->u.shortsZ[glyph + 1];
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}
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else
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{
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start_offset = loca_table->u.longsZ[glyph];
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end_offset = loca_table->u.longsZ[glyph + 1];
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}
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if (start_offset > end_offset || end_offset > glyf_len)
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return false;
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if (end_offset - start_offset < GlyphHeader::static_size)
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return true; /* Empty glyph; zero extents. */
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const GlyphHeader &glyph_header = StructAtOffset<GlyphHeader> (glyf_table, start_offset);
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extents->x_bearing = MIN (glyph_header.xMin, glyph_header.xMax);
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extents->y_bearing = MAX (glyph_header.yMin, glyph_header.yMax);
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extents->width = MAX (glyph_header.xMin, glyph_header.xMax) - extents->x_bearing;
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extents->height = MIN (glyph_header.yMin, glyph_header.yMax) - extents->y_bearing;
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return true;
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}
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private:
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bool short_offset;
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unsigned int num_glyphs;
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const loca *loca_table;
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const glyf *glyf_table;
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hb_blob_t *loca_blob;
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hb_blob_t *glyf_blob;
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unsigned int glyf_len;
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};
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public:
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BYTE dataX[VAR]; /* Glyphs data. */
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DEFINE_SIZE_ARRAY (0, dataX);
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};
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struct glyfGlyphHeader
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{
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SHORT numberOfContours; /* If the number of contours is
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* greater than or equal to zero,
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* this is a simple glyph; if negative,
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* this is a composite glyph. */
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FWORD xMin; /* Minimum x for coordinate data. */
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FWORD yMin; /* Minimum y for coordinate data. */
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FWORD xMax; /* Maximum x for coordinate data. */
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FWORD yMax; /* Maximum y for coordinate data. */
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DEFINE_SIZE_STATIC (10);
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};
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} /* namespace OT */
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