Initial commit

luaharfbuzz/examples/core_types.lua

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+local harfbuzz = require('harfbuzz')
+local serpent  = require('serpent') -- luarocks install serpent
+
+-- Harfbuzz API Version
+print("Harfbuzz API version", harfbuzz.version())
+
+-- Shapers available
+print("Shapers:", serpent.line({ harfbuzz.shapers() }, {comment = false}))
+
+-- harfbuzz.Face
+local face = harfbuzz.Face.new('../fonts/notonastaliq.ttf')
+print('\nFace upem = '..face:get_upem())
+
+-- harfbuzz.Font
+local font = harfbuzz.Font.new(face)
+local xs, xy = font:get_scale()
+print("\nDefault font scale = X: "..xs..", Y: "..xy)
+
+-- harfbuzz.Buffer
+local text = "یہ" -- U+06CC U+06C1
+local buf = harfbuzz.Buffer.new()
+buf:add_utf8(text)
+
+-- harfbuzz.shape (Shapes text)
+print("\nShaping '"..text.."' set with Noto Nastaliq Urdu")
+harfbuzz.shape(font, buf, { language = harfbuzz.Language.new("urd"), script = harfbuzz.Script.new("Arab"), direction = harfbuzz.Direction.RTL})
+
+local glyphs = buf:get_glyphs()
+print("No. of glyphs", #glyphs)
+print(serpent.line(glyphs, {comment = false}))
+
+local opts = { language = harfbuzz.Language.new("eng"), script = harfbuzz.Script.new("Latn"), direction = harfbuzz.Direction.LTR }
+local amiri_face = harfbuzz.Face.new('../fonts/amiri-regular.ttf')
+local amiri_font = harfbuzz.Font.new(amiri_face)
+
+-- shaping '123' w/o features
+print("\nShaping '123' set with Amiri Regular and no features")
+buf= harfbuzz.Buffer.new()
+buf:add_utf8("123")
+harfbuzz.shape(amiri_font, buf, opts)
+glyphs = buf:get_glyphs()
+print(serpent.line(glyphs, {comment = false}))
+
+-- shaping '123' with '+numr' (numerators)
+print("\nShaping '123' set with Amiri Regular with 'numr' feature turned on")
+buf= harfbuzz.Buffer.new()
+buf:add_utf8("123")
+opts.features = "+numr"
+harfbuzz.shape(amiri_font, buf, opts)
+glyphs = buf:get_glyphs()
+print(serpent.line(glyphs, {comment = false}))
+