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32 #include "platform/fonts/harfbuzz/HarfBuzzFace.h"
34 #include "platform/fonts/FontPlatformData.h"
35 #include "platform/fonts/SimpleFontData.h"
36 #include "platform/fonts/harfbuzz/HarfBuzzShaper.h"
38 #include <ApplicationServices/ApplicationServices.h>
43 static hb_position_t floatToHarfBuzzPosition(CGFloat value)
45 return static_cast<hb_position_t>(value * (1 << 16));
48 static hb_bool_t getGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)
50 CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
51 UniChar characters[4];
54 U16_APPEND_UNSAFE(characters, length, unicode);
55 if (!CTFontGetGlyphsForCharacters(ctFont, characters, cgGlyphs, length))
61 static hb_position_t getGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData)
63 CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
64 CGGlyph cgGlyph = glyph;
65 CGFloat advance = CTFontGetAdvancesForGlyphs(ctFont, kCTFontHorizontalOrientation, &cgGlyph, 0, 1);
66 return floatToHarfBuzzPosition(advance);
69 static hb_bool_t getGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData)
74 static hb_bool_t getGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_glyph_extents_t* extents, void* userData)
76 CTFontRef ctFont = reinterpret_cast<FontPlatformData*>(fontData)->ctFont();
78 CGGlyph cgGlyph = glyph;
79 if (CTFontGetBoundingRectsForGlyphs(ctFont, kCTFontDefaultOrientation, &cgGlyph, &cgRect, 1) == CGRectNull)
81 extents->x_bearing = floatToHarfBuzzPosition(cgRect.origin.x);
82 extents->y_bearing = -floatToHarfBuzzPosition(cgRect.origin.y);
83 extents->width = floatToHarfBuzzPosition(cgRect.size.width);
84 extents->height = floatToHarfBuzzPosition(cgRect.size.height);
88 static hb_font_funcs_t* harfBuzzCoreTextGetFontFuncs()
90 static hb_font_funcs_t* harfBuzzCoreTextFontFuncs = 0;
92 if (!harfBuzzCoreTextFontFuncs) {
93 harfBuzzCoreTextFontFuncs = hb_font_funcs_create();
94 hb_font_funcs_set_glyph_func(harfBuzzCoreTextFontFuncs, getGlyph, 0, 0);
95 hb_font_funcs_set_glyph_h_advance_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalAdvance, 0, 0);
96 hb_font_funcs_set_glyph_h_origin_func(harfBuzzCoreTextFontFuncs, getGlyphHorizontalOrigin, 0, 0);
97 hb_font_funcs_set_glyph_extents_func(harfBuzzCoreTextFontFuncs, getGlyphExtents, 0, 0);
98 hb_font_funcs_make_immutable(harfBuzzCoreTextFontFuncs);
100 return harfBuzzCoreTextFontFuncs;
103 static void releaseTableData(void* userData)
105 CFDataRef cfData = reinterpret_cast<CFDataRef>(userData);
109 static hb_blob_t* harfBuzzCoreTextGetTable(hb_face_t* face, hb_tag_t tag, void* userData)
111 CGFontRef cgFont = reinterpret_cast<CGFontRef>(userData);
112 CFDataRef cfData = CGFontCopyTableForTag(cgFont, tag);
116 const char* data = reinterpret_cast<const char*>(CFDataGetBytePtr(cfData));
117 const size_t length = CFDataGetLength(cfData);
118 if (!data || !length)
120 return hb_blob_create(data, length, HB_MEMORY_MODE_READONLY, reinterpret_cast<void*>(const_cast<__CFData*>(cfData)), releaseTableData);
123 hb_face_t* HarfBuzzFace::createFace()
125 // It seems that CTFontCopyTable of MacOSX10.5 sdk doesn't work for
126 // OpenType layout tables(GDEF, GSUB, GPOS). Use CGFontCopyTableForTag instead.
127 hb_face_t* face = hb_face_create_for_tables(harfBuzzCoreTextGetTable, m_platformData->cgFont(), 0);
132 hb_font_t* HarfBuzzFace::createFont()
134 hb_font_t* font = hb_font_create(m_face);
135 hb_font_set_funcs(font, harfBuzzCoreTextGetFontFuncs(), m_platformData, 0);
136 const float size = m_platformData->m_size;
137 hb_font_set_ppem(font, size, size);
138 const int scale = (1 << 16) * static_cast<int>(size);
139 hb_font_set_scale(font, scale, scale);
140 hb_font_make_immutable(font);