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-rw-r--r--Build/source/texk/web2c/luatexdir/luaharfbuzz/src/harfbuzz.lua84
1 files changed, 84 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/luaharfbuzz/src/harfbuzz.lua b/Build/source/texk/web2c/luatexdir/luaharfbuzz/src/harfbuzz.lua
new file mode 100644
index 00000000000..b7b0d7ff88c
--- /dev/null
+++ b/Build/source/texk/web2c/luatexdir/luaharfbuzz/src/harfbuzz.lua
@@ -0,0 +1,84 @@
+local hb = require("luaharfbuzz")
+
+-- special tags
+hb.Tag.NONE = hb.Tag.new()
+
+-- special script codes (ISO 15924)
+hb.Script.COMMON = hb.Script.new("Zyyy")
+hb.Script.INHERITED = hb.Script.new("Zinh")
+hb.Script.UNKNOWN = hb.Script.new("Zzzz")
+hb.Script.INVALID = hb.Script.from_iso15924_tag(hb.Tag.NONE)
+
+-- directions
+hb.Direction.INVALID = hb.Direction.new("invalid")
+hb.Direction.LTR = hb.Direction.new("ltr")
+hb.Direction.RTL = hb.Direction.new("rtl")
+hb.Direction.TTB = hb.Direction.new("ttb")
+hb.Direction.BTT = hb.Direction.new("btt")
+
+-- special languages
+hb.Language.INVALID = hb.Language.new()
+
+hb.shape = function(font, buf, options)
+ options = options or { }
+
+ -- Apply options to buffer if they are set.
+ if options.language then buf:set_language(options.language) end
+ if options.script then buf:set_script(options.script) end
+ if options.direction then buf:set_direction(options.direction) end
+
+ -- Guess segment properties, in case all steps above have failed
+ -- to set the right properties.
+ buf:guess_segment_properties()
+
+ local features = {}
+
+ -- Parse features
+ if type(options.features) == "string" then
+ for fs in string.gmatch(options.features, '([^,]+)') do
+ local feature = hb.Feature.new(fs)
+ if feature then
+ table.insert(features, hb.Feature.new(fs))
+ else
+ error(string.format("Invalid feature string: '%s'", fs))
+ end
+ end
+ elseif type(options.features) == "table" then
+ features = options.features
+ elseif options.features then -- non-nil but not a string or table
+ error("Invalid features option")
+ end
+
+ return hb.shape_full(font,buf,features,options.shapers or {})
+end
+
+-- For backward compatibility
+hb.Buffer.HB_BUFFER_CLUSTER_LEVEL_MONOTONE_GRAPHEMES = hb.Buffer.CLUSTER_LEVEL_MONOTONE_GRAPHEMES
+hb.Buffer.HB_BUFFER_CLUSTER_LEVEL_MONOTONE_CHARACTERS = hb.Buffer.CLUSTER_LEVEL_MONOTONE_CHARACTERS
+hb.Buffer.HB_BUFFER_CLUSTER_LEVEL_CHARACTERS = hb.Buffer.CLUSTER_LEVEL_CHARACTERS
+hb.Buffer.HB_BUFFER_CLUSTER_LEVEL_DEFAULT = hb.Buffer.CLUSTER_LEVEL_DEFAULT
+
+hb.Tag.HB_TAG_NONE = hb.Tag.NONE
+
+hb.Script.HB_SCRIPT_COMMON = hb.Script.COMMON
+hb.Script.HB_SCRIPT_INHERITED = hb.Script.INHERITED
+hb.Script.HB_SCRIPT_UNKNOWN = hb.Script.UNKNOWN
+hb.Script.HB_SCRIPT_INVALID = hb.Script.INVALID
+
+hb.Language.HB_LANGUAGE_INVALID = hb.Language.INVALID
+
+hb.Direction.HB_DIRECTION_INVALID = hb.Direction.INVALID
+hb.Direction.HB_DIRECTION_LTR = hb.Direction.LTR
+hb.Direction.HB_DIRECTION_RTL = hb.Direction.RTL
+hb.Direction.HB_DIRECTION_TTB = hb.Direction.TTB
+hb.Direction.HB_DIRECTION_BTT = hb.Direction.BTT
+
+hb.Direction.HB_DIRECTION_IS_VALID = hb.Direction.is_valid
+hb.Direction.HB_DIRECTION_IS_HORIZONTAL = hb.Direction.is_horizontal
+hb.Direction.HB_DIRECTION_IS_VERTICAL = hb.Direction.is_vertical
+hb.Direction.HB_DIRECTION_IS_FORWARD = hb.Direction.is_forward
+hb.Direction.HB_DIRECTION_IS_BACKWARD = hb.Direction.is_backward
+
+hb.Buffer.get_glyph_infos_and_positions = hb.Buffer.get_glyphs
+
+return hb