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local harfbuzz = require("harfbuzz")
describe("harfbuzz module", function()
it("returns a valid version string", function()
assert.are_equal("string", type(harfbuzz.version()))
end)
it("returns a valid list of shapers", function()
local shapers = { harfbuzz.shapers }
assert.is_not.True(#shapers == 0)
end)
describe("harfbuzz.Blob", function()
it("can be initialized with a string", function()
local s = "test string"
local blob = harfbuzz.Blob.new(s)
assert.are_equal(string.len(s), blob:get_length())
end)
end)
describe("harfbuzz.Face", function()
local face = harfbuzz.Face.new('fonts/notonastaliq.ttf')
it("can be initialized with a blob", function()
local fontfile = io.open('fonts/notonastaliq.ttf', "r")
local fontdata = fontfile:read("*all")
fontfile:close()
local blob = harfbuzz.Blob.new(fontdata)
harfbuzz.Face.new_from_blob(blob,0)
end)
it("can be initialized with a file and a font index", function()
harfbuzz.Face.new('fonts/notonastaliq.ttf',0)
end)
it("can be initialized with a file only", function()
harfbuzz.Face.new('fonts/notonastaliq.ttf')
end)
it("returns a valid upem value", function()
assert.are_equal(2048,face:get_upem())
end)
it("can return SFNT table", function()
local b = face:get_table(harfbuzz.Tag.new("OS/2"))
local d = b:get_data()
assert.are_equal(96,b:get_length())
assert.are_equal(96,#d)
assert.are_equal(4,string.unpack(">H", d, 1))
assert.are_equal(1155,string.unpack(">h", d, 3))
assert.are_equal(5,string.unpack(">H", d, -2))
end)
it("can return table tags", function()
local t = face:get_table_tags()
assert.are_equal(14,#t)
assert.are_equal("GDEF",tostring(t[1]))
assert.are_equal("post",tostring(t[#t]))
end)
it("can return glyph count", function()
assert.are_equal(1133,face:get_glyph_count())
end)
it("can return unicode characters supported by face", function()
local u = face:collect_unicodes()
assert.are_equal(267,#u)
assert.are_equal(0x0000,u[1])
assert.are_equal(0xFEFF,u[#u])
end)
it("can return face names", function()
assert.are_equal("Copyright 2014 Google Inc. All Rights Reserved.",face:get_name(harfbuzz.ot.NAME_ID_COPYRIGHT))
assert.are_equal("Noto Nastaliq Urdu",face:get_name(harfbuzz.ot.NAME_ID_FONT_FAMILY))
assert.are_equal("Regular",face:get_name(harfbuzz.ot.NAME_ID_FONT_SUBFAMILY))
assert.are_equal("Noto Nastaliq Urdu",face:get_name(harfbuzz.ot.NAME_ID_FULL_NAME))
assert.are_equal("NotoNastaliqUrdu",face:get_name(harfbuzz.ot.NAME_ID_POSTSCRIPT_NAME))
assert.are_equal("Noto is a trademark of Google Inc.",face:get_name(harfbuzz.ot.NAME_ID_TRADEMARK))
assert.are_equal(331,#face:get_name(harfbuzz.ot.NAME_ID_LICENSE))
assert.are_equal(nil,face:get_name(harfbuzz.ot.NAME_ID_INVALID))
end)
it("can return face names with language", function()
local f = harfbuzz.Face.new('fonts/amiri-regular.ttf')
local ar = harfbuzz.Language.new("ar")
local en = harfbuzz.Language.new("en")
assert.are_equal("حقوق النشر 2010-2015، خالد حسني <khaledhosny@eglug.org>.",f:get_name(harfbuzz.ot.NAME_ID_COPYRIGHT, ar))
assert.are_equal("Copyright (c) 2010-2015, Khaled Hosny <khaledhosny@eglug.org>.\nPortions copyright (c) 2010, Sebastian Kosch <sebastian@aldusleaf.org>.",f:get_name(harfbuzz.ot.NAME_ID_COPYRIGHT, en))
assert.are_equal("عادي",f:get_name(harfbuzz.ot.NAME_ID_FONT_SUBFAMILY, ar))
assert.are_equal("Regular",f:get_name(harfbuzz.ot.NAME_ID_FONT_SUBFAMILY, en))
assert.are_equal("إصدارة 000٫108",f:get_name(harfbuzz.ot.NAME_ID_VERSION_STRING, ar))
assert.are_equal("Version 000.108 ",f:get_name(harfbuzz.ot.NAME_ID_VERSION_STRING, en))
assert.are_equal("خالد حسني",f:get_name(harfbuzz.ot.NAME_ID_DESIGNER, ar))
assert.are_equal("Khaled Hosny",f:get_name(harfbuzz.ot.NAME_ID_DESIGNER, en))
assert.are_equal(512,#f:get_name(harfbuzz.ot.NAME_ID_DESCRIPTION, ar))
assert.are_equal(263,#f:get_name(harfbuzz.ot.NAME_ID_DESCRIPTION, en))
assert.are_equal("صِفْ خَلْقَ خَوْدٍ كَمِثْلِ ٱلشَّمْسِ إِذْ بَزَغَتْ يَحْظَىٰ ٱلضَّجِيعُ بِهَا نَجْلَاءَ مِعْطَارِ.",f:get_name(harfbuzz.ot.NAME_ID_SAMPLE_TEXT, ar))
assert.are_equal("صِفْ خَلْقَ خَوْدٍ كَمِثْلِ ٱلشَّمْسِ إِذْ بَزَغَتْ يَحْظَىٰ ٱلضَّجِيعُ بِهَا نَجْلَاءَ مِعْطَارِ.",f:get_name(harfbuzz.ot.NAME_ID_SAMPLE_TEXT, en))
end)
it("can check color palettes", function()
local f = harfbuzz.Face.new('fonts/amiriquran-colored.ttf')
assert.are_equal(false,face:ot_color_has_palettes())
assert.are_equal(true,f:ot_color_has_palettes())
end)
it("can return number of color palettes", function()
local f = harfbuzz.Face.new('fonts/amiriquran-colored.ttf')
assert.are_equal(0,face:ot_color_palette_get_count())
assert.are_equal(1,f:ot_color_palette_get_count())
end)
it("can return palette colors", function()
local f = harfbuzz.Face.new('fonts/amiriquran-colored.ttf')
assert.are_equal(nil,face:ot_color_palette_get_colors())
local colors = {
{ alpha = 255, blue = 51, green = 51, red = 204, },
{ alpha = 255, blue = 80, green = 165, red = 0, },
{ alpha = 255, blue = 51, green = 153, red = 238, },
{ alpha = 255, blue = 153, green = 102, red = 51, },
}
assert.are_same(colors,f:ot_color_palette_get_colors())
end)
it("can check color layers", function()
local f = harfbuzz.Face.new('fonts/amiriquran-colored.ttf')
assert.are_equal(false,face:ot_color_has_layers())
assert.are_equal(true,f:ot_color_has_layers())
end)
it("can return glyph color layers", function()
local f = harfbuzz.Face.new('fonts/amiriquran-colored.ttf')
assert.are_equal(nil,face:ot_color_glyph_get_layers(100))
assert.are_equal(nil,f:ot_color_glyph_get_layers(2))
local layers = {
{ color_index = 65535, glyph = 1341 },
{ color_index = 1, glyph = 1370 },
}
assert.are_same(layers,f:ot_color_glyph_get_layers(100))
end)
it("can check PNG glyph support", function()
local f = harfbuzz.Face.new('fonts/notocoloremoji-subset.ttf')
assert.are_equal(false,face:ot_color_has_png())
assert.are_equal(true,f:ot_color_has_png())
end)
it("can check SVG glyph support", function()
local f = harfbuzz.Face.new('fonts/TwitterColorEmoji-SVGinOT.ttf')
assert.are_equal(false,face:ot_color_has_svg())
assert.are_equal(true,f:ot_color_has_svg())
end)
it("can return glyph color png", function()
local f = harfbuzz.Face.new('fonts/TwitterColorEmoji-SVGinOT.ttf')
assert.are_equal(nil,face:ot_color_glyph_get_svg(100))
assert.are_equal(nil,f:ot_color_glyph_get_svg(0))
assert.are_same(751,f:ot_color_glyph_get_svg(5):get_length())
assert.are_same(804,f:ot_color_glyph_get_svg(6):get_length())
assert.are_same("<?xml version='1.0' encoding='UTF-8'?>",f:ot_color_glyph_get_svg(5):get_data():sub(1, 38))
end)
it("can return script tags", function()
local t
local tags = {
harfbuzz.Tag.new("arab"),
harfbuzz.Tag.new("dflt"),
harfbuzz.Tag.new("latn"),
}
t = face:ot_layout_get_script_tags(harfbuzz.Tag.new("GSUB"))
assert.are_same(tags, t)
t = face:ot_layout_get_script_tags(harfbuzz.Tag.new("GPOS"))
assert.are_same({ tags[1] }, t)
end)
it("can return language tags", function()
local t
local tags = {
harfbuzz.Tag.new("ARA "),
harfbuzz.Tag.new("FAR "),
harfbuzz.Tag.new("KSH "),
harfbuzz.Tag.new("SND "),
harfbuzz.Tag.new("URD "),
}
t = face:ot_layout_get_language_tags(harfbuzz.Tag.new("GSUB"), 0)
assert.are_same(tags, t)
t = face:ot_layout_get_language_tags(harfbuzz.Tag.new("GPOS"), 0)
assert.are_equal(nil, t)
end)
it("can return feature tags", function()
local t, tags
tags = {
harfbuzz.Tag.new("ccmp"),
harfbuzz.Tag.new("isol"),
harfbuzz.Tag.new("init"),
harfbuzz.Tag.new("medi"),
harfbuzz.Tag.new("fina"),
harfbuzz.Tag.new("rlig"),
}
t = face:ot_layout_get_feature_tags(harfbuzz.Tag.new("GSUB"), 0, 0)
assert.are_same(tags, t)
tags = {
harfbuzz.Tag.new("curs"),
harfbuzz.Tag.new("mark"),
harfbuzz.Tag.new("mkmk"),
}
t = face:ot_layout_get_feature_tags(harfbuzz.Tag.new("GPOS"), 0, harfbuzz.ot.LAYOUT_DEFAULT_LANGUAGE_INDEX)
assert.are_same(tags, t)
end)
it("can find scripts, languages and features", function()
local r, i
r, i = face:ot_layout_find_script(harfbuzz.Tag.new("GSUB"), harfbuzz.Tag.new("latn"))
assert.True(r)
assert.are_same(2, i)
r, i = face:ot_layout_find_language(harfbuzz.Tag.new("GSUB"), i, harfbuzz.Tag.new("ENG "))
assert.False(r)
assert.are_same(harfbuzz.ot.LAYOUT_DEFAULT_LANGUAGE_INDEX, i)
r, i = face:ot_layout_find_language(harfbuzz.Tag.new("GSUB"), 0, harfbuzz.Tag.new("ARA "))
assert.True(r)
assert.are_same(0, i)
r, i = face:ot_layout_find_feature(harfbuzz.Tag.new("GSUB"), 0, i, harfbuzz.Tag.new("rlig"))
assert.True(r)
assert.are_same(13, i)
r, i = face:ot_layout_find_feature(harfbuzz.Tag.new("GSUB"), 1, harfbuzz.ot.LAYOUT_DEFAULT_LANGUAGE_INDEX, harfbuzz.Tag.new("rlig"))
assert.True(r)
assert.are_same(13, i)
end)
end)
describe("harfbuzz.Font", function()
local face = harfbuzz.Face.new('fonts/notonastaliq.ttf')
it("can be initialized with a face", function()
harfbuzz.Font.new(face)
end)
it("has a default scale set to the fonts upem", function()
local font = harfbuzz.Font.new(face)
local upem = face:get_upem()
local xs, ys = font:get_scale()
assert.are_equal(upem, xs)
assert.are_equal(upem, ys)
end)
it("can set the scale of the font using set_scale", function()
local font = harfbuzz.Font.new(face)
font:set_scale(1024,2048)
local xs, ys = font:get_scale()
assert.are_equal(1024, xs)
assert.are_equal(2048, ys)
end)
it("can get glyph extents using get_glyph_extents", function()
local font = harfbuzz.Font.new(face)
local extents = font:get_glyph_extents(0)
assert.are_equal(145, extents.x_bearing)
assert.are_equal(2452, extents.y_bearing)
assert.are_equal(1553, extents.width)
assert.are_equal(-2452, extents.height)
extents = font:get_glyph_extents(1)
assert.are_equal(0, extents.x_bearing)
assert.are_equal(0, extents.y_bearing)
assert.are_equal(0, extents.width)
assert.are_equal(0, extents.height)
end)
it("can get font extents", function()
local font = harfbuzz.Font.new(face)
local extents = font:get_h_extents(0)
assert.are_equal(3900, extents.ascender)
assert.are_equal(-1220, extents.descender)
assert.are_equal(0, extents.line_gap)
extents = font:get_v_extents(1)
assert.are_equal(nil, extents)
end)
it("can get glyph name using get_glyph_name", function()
local font = harfbuzz.Font.new(face)
assert.are_equal(".notdef", font:get_glyph_name(0))
assert.are_equal("null", font:get_glyph_name(1))
end)
it("can get glyph using get_glyph_from_name", function()
local font = harfbuzz.Font.new(face)
assert.are_equal(0, font:get_glyph_from_name(".notdef"))
assert.are_equal(1, font:get_glyph_from_name("null"))
end)
it("can get glyph advance using get_glyph_h_advance", function()
local font = harfbuzz.Font.new(face)
assert.are_equal(1843, font:get_glyph_h_advance(0))
assert.are_equal(0, font:get_glyph_h_advance(1))
end)
it("can get glyph advance using get_glyph_v_advance", function()
local font = harfbuzz.Font.new(face)
assert.are_equal(-2048, font:get_glyph_v_advance(0))
assert.are_equal(-2048, font:get_glyph_v_advance(1))
end)
it("can get nominal glyph for codepoint", function()
local font = harfbuzz.Font.new(face)
assert.are_equal(nil, font:get_nominal_glyph(0x0041))
assert.are_equal(858, font:get_nominal_glyph(0x0627))
end)
it("can return glyph color png", function()
local font = harfbuzz.Font.new(face)
local f = harfbuzz.Font.new(harfbuzz.Face.new('fonts/notocoloremoji-subset.ttf'))
assert.are_equal(nil,font:ot_color_glyph_get_png(100))
assert.are_equal(nil,f:ot_color_glyph_get_png(0))
assert.are_same(2233,f:ot_color_glyph_get_png(1):get_length())
assert.are_same(2857,f:ot_color_glyph_get_png(2):get_length())
assert.are_same("\137PNG",f:ot_color_glyph_get_png(2):get_data():sub(1, 4))
end)
end)
describe("harfbuzz.Feature", function()
it("can be initialised with a valid feature string", function()
harfbuzz.Feature.new('kern')
harfbuzz.Feature.new('+kern')
end)
it("throws an error when trying to initialise a new Feature with an invalid string", function()
assert.are_equal(nil, harfbuzz.Feature.new(''))
assert.are_equal(nil, harfbuzz.Feature.new('#kern'))
end)
it("has a valid tostring value", function()
local fs = 'kern'
local f = harfbuzz.Feature.new(fs)
assert.are_equal(fs, tostring(f))
end)
it("has visible fields", function()
local f = harfbuzz.Feature.new('-kern')
print(getmetatable(f).__index)
assert.are_equal(tostring(f.tag), 'kern')
assert.are_equal(f.value, 0)
assert.are_equal(f.start, nil)
assert.are_equal(f._end, nil)
f = harfbuzz.Feature.new('aalt[3:5]=4')
assert.are_equal(tostring(f.tag), 'aalt')
assert.are_equal(f.value, 4)
assert.are_equal(f.start, 3)
assert.are_equal(f._end, 5)
end)
it("has editable fields", function()
local f = harfbuzz.Feature.new('-kern')
f.tag, f.value, f.start, f._end = harfbuzz.Tag.new"aalt", 4, 3, 5
assert.are_equal(tostring(f), "aalt[3:5]=4")
f.tag, f.value, f.start, f._end = harfbuzz.Tag.new"harf", 0, nil, nil
assert.are_equal(tostring(f), "-harf")
end)
end)
describe("harfbuzz.Tag", function()
it("can be initialised with a valid tag string", function()
harfbuzz.Tag.new('Zyyy')
end)
it("can be initialised to NONE with nil or empty argument", function()
local t = harfbuzz.Tag.new()
assert.are_equal(harfbuzz.Tag.NONE, t)
t = harfbuzz.Tag.new(nil)
assert.are_equal(harfbuzz.Tag.NONE, t)
end)
it("has a valid tostring value", function()
local ts = 'Arab'
local t = harfbuzz.Tag.new(ts)
assert.are_equal(ts, tostring(t))
end)
it("has a valid equality check functions", function()
local ts = 'Arab'
local t1 = harfbuzz.Tag.new(ts)
local t2 = harfbuzz.Tag.new(ts)
local t3 = harfbuzz.Tag.new("Latn")
assert.are_equal(t1, t2)
assert.are_not_equal(t1, t3)
end)
it("has a preset value for NONE", function()
local n = harfbuzz.Tag.NONE
assert.is_not_nil(n)
assert.are_equal("", tostring(n))
assert.are_equal(harfbuzz.Tag.NONE, harfbuzz.Tag.new(""))
end)
end)
describe("harfbuzz.Script", function()
it("can be initialised with a string", function()
harfbuzz.Script.new('Arab')
end)
it("can be initialised to INVALID with nil or empty argument", function()
local t = harfbuzz.Script.new()
assert.are_equal(harfbuzz.Script.INVALID, t)
t = harfbuzz.Script.new(nil)
assert.are_equal(harfbuzz.Script.INVALID, t)
end)
it("can be initialised with a tag", function()
local ts = "Arab"
local s = harfbuzz.Script.from_iso15924_tag(harfbuzz.Tag.new(ts))
assert.are_equal(ts, tostring(s))
end)
it("can be converted to a tag", function()
local s = 'Arab'
local sc = harfbuzz.Script.new(s)
assert.are_equal(s, tostring(sc:to_iso15924_tag()))
end)
it("has a valid tostring value", function()
local ts = 'Arab'
local t = harfbuzz.Script.new(ts)
assert.are_equal(ts, tostring(t))
end)
it("has a valid equality check functions", function()
local ts = 'Arab'
local t1 = harfbuzz.Script.new(ts)
local t2 = harfbuzz.Script.new(ts)
local t3 = harfbuzz.Script.new("Latn")
assert.are_equal(t1, t2)
assert.are_not_equal(t1, t3)
end)
end)
describe("harfbuzz.Direction", function()
it("can be initialised with a valid tag string", function()
harfbuzz.Direction.new('LTR')
end)
it("can be initialised with invalid strings", function()
local d1 = harfbuzz.Direction.new("i")
local d2 = harfbuzz.Direction.new("inv")
assert.are_equal(d1, d2)
assert.are_equal("invalid", tostring(d1))
end)
it("has a valid tostring value", function()
local ts = 'ltr'
local t = harfbuzz.Direction.new(ts)
assert.are_equal(ts, tostring(t))
t = harfbuzz.Direction.new("LTR")
assert.are_equal(ts, tostring(t))
end)
it("has a valid equality check functions", function()
local ts = 'ltr'
local t1 = harfbuzz.Direction.new(ts)
local t2 = harfbuzz.Direction.new(ts)
local t3 = harfbuzz.Direction.new("rtl")
assert.are_equal(t1, t2)
assert.are_not_equal(t1, t3)
end)
it("has a is_valid function", function()
assert.True(harfbuzz.Direction.LTR:is_valid())
assert.False(harfbuzz.Direction.INVALID:is_valid())
end)
it("has a is_horizontal function", function()
assert.True(harfbuzz.Direction.LTR:is_horizontal())
assert.False(harfbuzz.Direction.TTB:is_horizontal())
end)
it("has a is_vertical function", function()
assert.True(harfbuzz.Direction.TTB:is_vertical())
assert.False(harfbuzz.Direction.LTR:is_vertical())
end)
it("has a is_forward function", function()
assert.True(harfbuzz.Direction.LTR:is_forward())
assert.False(harfbuzz.Direction.RTL:is_forward())
end)
it("has a is_backward function", function()
assert.True(harfbuzz.Direction.RTL:is_backward())
assert.False(harfbuzz.Direction.LTR:is_backward())
end)
end)
describe("harfbuzz.Language", function()
it("can be initialised with a valid language string", function()
harfbuzz.Language.new('urd')
end)
it("can be initialised to INVALID with nil or empty argument", function()
local t = harfbuzz.Language.new()
assert.are_equal(harfbuzz.Language.INVALID, t)
t = harfbuzz.Language.new(nil)
assert.are_equal(harfbuzz.Language.INVALID, t)
end)
it("has a valid tostring value", function()
local ts = 'urd'
local t = harfbuzz.Language.new(ts)
assert.are_equal(ts, tostring(t))
end)
it("has a valid equality check functions", function()
local ts = 'urd'
local t1 = harfbuzz.Language.new(ts)
local t2 = harfbuzz.Language.new(ts)
local t3 = harfbuzz.Language.new("hin")
assert.are_equal(t1, t2)
assert.are_not_equal(t1, t3)
end)
it("has a preset value for INVALID", function()
local n = harfbuzz.Language.INVALID
assert.is_not_nil(n)
assert.are_equal(harfbuzz.Language.INVALID, harfbuzz.Language.new())
assert.are_equal("", tostring(n))
end)
end)
describe("harfbuzz.unicode", function()
describe("script function returns a valid script for a codepoint",function()
local s = harfbuzz.unicode.script(0x0020)
assert.are_equal(harfbuzz.Script.COMMON, s)
s = harfbuzz.unicode.script(0x0041)
assert.are_equal(harfbuzz.Script.new("Latn"), s)
end)
end)
end)
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