From 40d45da8c22aa1699c3b62989eb881e5e2c67467 Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Sun, 29 Jan 2017 19:46:29 +0100
Subject: [db] move design size handling into lookup
Store design sizes in sp in index. Lookups are performed using sp
so the design size factor can be applied at runtime.
---
src/luaotfload-database.lua | 89 +++++++++++++++++++++++----------------------
1 file changed, 45 insertions(+), 44 deletions(-)
(limited to 'src')
diff --git a/src/luaotfload-database.lua b/src/luaotfload-database.lua
index 14fe4b3..66755d3 100644
--- a/src/luaotfload-database.lua
+++ b/src/luaotfload-database.lua
@@ -111,7 +111,7 @@ if not modules then modules = { } end modules ['luaotfload-database'] = {
--doc]]--
local lpeg = require "lpeg"
-local P, Cc, lpegmatch = lpeg.P, lpeg.Cc, lpeg.match
+local P, lpegmatch = lpeg.P, lpeg.match
local log = luaotfload.log
local logreport = log and log.report or print -- overriden later on
@@ -890,8 +890,9 @@ end
--[[doc--
- choose_size -- Pick a font face of appropriate size from the list
- of family members with matching style. There are three categories:
+ choose_size -- Pick a font face of appropriate size (in sp) from
+ the list of family members with matching style. There are three
+ categories:
1. exact matches: if there is a face whose design size equals
the asked size, it is returned immediately and no further
@@ -1041,6 +1042,35 @@ local lookup_fontname = function (specification, name, style)
return nil, nil
end
+local design_size_dimension
+local set_size_dimension
+do
+
+ --- cf. TeXbook p. 57
+ local dimens = {
+ pt = function (v) return v end,
+ bp = function (v) return (v * 7200) / 7227 end,
+ dd = function (v) return (v * 1157) / 1238 end,
+ }
+
+ design_size_dimension = dimens.bp
+
+ set_size_dimension = function (dim)
+ local f = dimens [dim]
+ if f then
+ logreport ("both", 4, "db",
+ "Interpreting design sizes as %q, factor %.6f.",
+ dim, f (1.000000))
+ design_size_dimension = f
+ return
+ end
+ logreport ("both", 0, "db",
+ "Invalid dimension %q requested for design sizes; \z
+ ignoring.")
+ end
+end
+
+
--[[doc--
lookup_font_name -- Perform a name: lookup. This first queries the
@@ -1098,15 +1128,14 @@ lookup_font_name = function (specification)
local askedsize = specification.optsize
if askedsize then
- askedsize = tonumber (askedsize)
+ askedsize = tonumber (askedsize) * 65536
else
askedsize = specification.size
- if askedsize and askedsize >= 0 then
- askedsize = askedsize / 65536
- else
+ if not askedsize or askedsize < 0 then
askedsize = 0
end
end
+ askedsize = design_size_dimension (askedsize)
resolved, subfont = lookup_familyname (specification,
name,
@@ -1321,35 +1350,7 @@ local load_font_file = function (filename, subfont)
return ret
end
-local set_size_dimension
-local get_size_info
-do --- too many upvalues :/
- --- cf. TeXbook p. 57
- local dimens = {
- pt = function (v) return v end,
- bp = function (v) return (v * 7200.0) / 7227.0 end,
- dd = function (v) return (v * 1157.0) / 1238.0 end,
- }
-
- local dimen_pt = 1
- local dimen_bp = 2
- local dimen_dd = 3
-
- local size_dimen = dimens.bp
- set_size_dimension = function (dim)
- local f = dimens [dim]
- if f then
- logreport ("both", 4, "db",
- "Interpreting design sizes as %q, factor %.6f.",
- dim, f (1.000000))
- size_dimen = f
- return
- end
- logreport ("both", 0, "db",
- "Invalid dimension %q requested for design sizes; \z
- ignoring.")
- end
-
+local get_size_info do --- too many upvalues :/
--- rawdata -> (int * int * int | bool)
get_size_info = function (rawinfo)
@@ -1362,13 +1363,13 @@ do --- too many upvalues :/
or design_range_top ~= 0 and design_range_top
if fallback_size then
- design_size = (design_size or fallback_size) / 10
- design_range_top = (design_range_top or fallback_size) / 10
- design_range_bottom = (design_range_bottom or fallback_size) / 10
+ design_size = ((design_size or fallback_size) * 2^16) / 10
+ design_range_top = ((design_range_top or fallback_size) * 2^16) / 10
+ design_range_bottom = ((design_range_bottom or fallback_size) * 2^16) / 10
- design_size = size_dimen (design_size )
- design_range_top = size_dimen (design_range_top )
- design_range_bottom = size_dimen (design_range_bottom)
+ design_size = (design_size * 7200) / 7227
+ design_range_top = (design_range_top * 7200) / 7227
+ design_range_bottom = (design_range_bottom * 7200) / 7227
return {
design_size, design_range_top, design_range_bottom,
@@ -1947,7 +1948,7 @@ local create_blacklist = function (blacklist, whitelist)
if p_blacklist == nil then
--- always return false
- p_blacklist = Cc(false)
+ p_blacklist = lpeg.Cc(false)
end
return result
@@ -3634,7 +3635,7 @@ return {
fonts.definers = fonts.definers or { resolvers = { } }
names.blacklist = blacklist
- names.version = 3 --- increase monotonically
+ names.version = 4 --- increase monotonically
names.data = nil --- contains the loaded database
names.lookups = nil --- contains the lookup cache
--
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