--- old/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-color-sbix-table.hh 2019-02-28 12:03:53.618503048 -0800 +++ new/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-color-sbix-table.hh 2019-02-28 12:03:53.518503050 -0800 @@ -25,7 +25,7 @@ #ifndef HB_OT_COLOR_SBIX_TABLE_HH #define HB_OT_COLOR_SBIX_TABLE_HH -#include "hb-open-type-private.hh" +#include "hb-open-type.hh" /* * sbix -- Standard Bitmap Graphics @@ -62,19 +62,65 @@ struct SBIXStrike { - friend struct sbix; - - inline bool sanitize (hb_sanitize_context_t *c) const + bool sanitize (hb_sanitize_context_t *c) const { TRACE_SANITIZE (this); return_trace (c->check_struct (this) && - imageOffsetsZ.sanitize_shallow (c, c->num_glyphs + 1)); + imageOffsetsZ.sanitize_shallow (c, c->get_num_glyphs () + 1)); } - protected: + hb_blob_t *get_glyph_blob (unsigned int glyph_id, + hb_blob_t *sbix_blob, + hb_tag_t file_type, + int *x_offset, + int *y_offset, + unsigned int num_glyphs, + unsigned int *strike_ppem) const + { + if (unlikely (!ppem)) return hb_blob_get_empty (); /* To get Null() object out of the way. */ + + unsigned int retry_count = 8; + unsigned int sbix_len = sbix_blob->length; + unsigned int strike_offset = (const char *) this - (const char *) sbix_blob->data; + assert (strike_offset < sbix_len); + + retry: + if (unlikely (glyph_id >= num_glyphs || + imageOffsetsZ[glyph_id + 1] <= imageOffsetsZ[glyph_id] || + imageOffsetsZ[glyph_id + 1] - imageOffsetsZ[glyph_id] <= SBIXGlyph::min_size || + (unsigned int) imageOffsetsZ[glyph_id + 1] > sbix_len - strike_offset)) + return hb_blob_get_empty (); + + unsigned int glyph_offset = strike_offset + (unsigned int) imageOffsetsZ[glyph_id] + SBIXGlyph::min_size; + unsigned int glyph_length = imageOffsetsZ[glyph_id + 1] - imageOffsetsZ[glyph_id] - SBIXGlyph::min_size; + + const SBIXGlyph *glyph = &(this+imageOffsetsZ[glyph_id]); + + if (glyph->graphicType == HB_TAG ('d','u','p','e')) + { + if (glyph_length >= 2) + { + glyph_id = *((HBUINT16 *) &glyph->data); + if (retry_count--) + goto retry; + } + return hb_blob_get_empty (); + } + + if (unlikely (file_type != glyph->graphicType)) + return hb_blob_get_empty (); + + if (strike_ppem) *strike_ppem = ppem; + if (x_offset) *x_offset = glyph->xOffset; + if (y_offset) *y_offset = glyph->yOffset; + return hb_blob_create_sub_blob (sbix_blob, glyph_offset, glyph_length); + } + + public: HBUINT16 ppem; /* The PPEM size for which this strike was designed. */ HBUINT16 resolution; /* The device pixel density (in PPI) for which this * strike was designed. (E.g., 96 PPI, 192 PPI.) */ + protected: UnsizedArrayOf > imageOffsetsZ; /* Offset from the beginning of the strike data header * to bitmap data for an individual glyph ID. */ @@ -84,70 +130,157 @@ struct sbix { - static const hb_tag_t tableTag = HB_OT_TAG_sbix; + static constexpr hb_tag_t tableTag = HB_OT_TAG_sbix; - inline bool sanitize (hb_sanitize_context_t *c) const - { - TRACE_SANITIZE (this); - return_trace (likely (c->check_struct (this) && strikes.sanitize (c, this))); - } + bool has_data () const { return version; } + + const SBIXStrike &get_strike (unsigned int i) const { return this+strikes[i]; } struct accelerator_t { - inline void init (hb_face_t *face) + void init (hb_face_t *face) { - num_glyphs = hb_face_get_glyph_count (face); + table = hb_sanitize_context_t().reference_table (face); + num_glyphs = face->get_num_glyphs (); + } + void fini () { table.destroy (); } - OT::Sanitizer sanitizer; - sanitizer.set_num_glyphs (num_glyphs); - sbix_blob = sanitizer.sanitize (face->reference_table (HB_OT_TAG_sbix)); - sbix_len = hb_blob_get_length (sbix_blob); - sbix_table = sbix_blob->as (); + bool has_data () const { return table->has_data (); } + bool get_extents (hb_font_t *font, + hb_codepoint_t glyph, + hb_glyph_extents_t *extents) const + { + /* We only support PNG right now, and following function checks type. */ + return get_png_extents (font, glyph, extents); } - inline void fini (void) + hb_blob_t *reference_png (hb_font_t *font, + hb_codepoint_t glyph_id, + int *x_offset, + int *y_offset, + unsigned int *available_ppem) const { - hb_blob_destroy (sbix_blob); + return choose_strike (font).get_glyph_blob (glyph_id, table.get_blob (), + HB_TAG ('p','n','g',' '), + x_offset, y_offset, + num_glyphs, available_ppem); } - inline void dump (void (*callback) (const uint8_t* data, unsigned int length, - unsigned int group, unsigned int gid)) const + private: + + const SBIXStrike &choose_strike (hb_font_t *font) const { - for (unsigned group = 0; group < sbix_table->strikes.len; ++group) + unsigned count = table->strikes.len; + if (unlikely (!count)) + return Null(SBIXStrike); + + unsigned int requested_ppem = MAX (font->x_ppem, font->y_ppem); + if (!requested_ppem) + requested_ppem = 1<<30; /* Choose largest strike. */ + /* TODO Add DPI sensitivity as well? */ + unsigned int best_i = 0; + unsigned int best_ppem = table->get_strike (0).ppem; + + for (unsigned int i = 1; i < count; i++) { - const SBIXStrike &strike = sbix_table->strikes[group](sbix_table); - for (unsigned int glyph = 0; glyph < num_glyphs; ++glyph) - if (strike.imageOffsetsZ[glyph + 1] - strike.imageOffsetsZ[glyph] > 0) - { - const SBIXGlyph &sbixGlyph = strike.imageOffsetsZ[glyph]((const void *) &strike); - callback ((const uint8_t*) &sbixGlyph.data, - strike.imageOffsetsZ[glyph + 1] - strike.imageOffsetsZ[glyph] - 8, - group, glyph); - } + unsigned int ppem = (table->get_strike (i)).ppem; + if ((requested_ppem <= ppem && ppem < best_ppem) || + (requested_ppem > best_ppem && ppem > best_ppem)) + { + best_i = i; + best_ppem = ppem; + } } + + return table->get_strike (best_i); + } + + struct PNGHeader + { + HBUINT8 signature[8]; + struct + { + struct + { + HBUINT32 length; + Tag type; + } header; + HBUINT32 width; + HBUINT32 height; + HBUINT8 bitDepth; + HBUINT8 colorType; + HBUINT8 compressionMethod; + HBUINT8 filterMethod; + HBUINT8 interlaceMethod; + } IHDR; + + public: + DEFINE_SIZE_STATIC (29); + }; + + bool get_png_extents (hb_font_t *font, + hb_codepoint_t glyph, + hb_glyph_extents_t *extents) const + { + /* Following code is safe to call even without data. + * But faster to short-circuit. */ + if (!has_data ()) + return false; + + int x_offset = 0, y_offset = 0; + unsigned int strike_ppem = 0; + hb_blob_t *blob = reference_png (font, glyph, &x_offset, &y_offset, &strike_ppem); + + const PNGHeader &png = *blob->as(); + + extents->x_bearing = x_offset; + extents->y_bearing = y_offset; + extents->width = png.IHDR.width; + extents->height = png.IHDR.height; + + /* Convert to font units. */ + if (strike_ppem) + { + double scale = font->face->get_upem () / (double) strike_ppem; + extents->x_bearing = round (extents->x_bearing * scale); + extents->y_bearing = round (extents->y_bearing * scale); + extents->width = round (extents->width * scale); + extents->height = round (extents->height * scale); + } + + hb_blob_destroy (blob); + + return strike_ppem; } private: - hb_blob_t *sbix_blob; - const sbix *sbix_table; + hb_blob_ptr_t table; - unsigned int sbix_len; unsigned int num_glyphs; - }; + bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (likely (c->check_struct (this) && + version >= 1 && + strikes.sanitize (c, this))); + } + protected: HBUINT16 version; /* Table version number — set to 1 */ HBUINT16 flags; /* Bit 0: Set to 1. Bit 1: Draw outlines. * Bits 2 to 15: reserved (set to 0). */ - LArrayOf > + LOffsetLArrayOf strikes; /* Offsets from the beginning of the 'sbix' * table to data for each individual bitmap strike. */ public: DEFINE_SIZE_ARRAY (8, strikes); }; +struct sbix_accelerator_t : sbix::accelerator_t {}; + } /* namespace OT */ #endif /* HB_OT_COLOR_SBIX_TABLE_HH */