mirror of
https://github.com/koreader/koreader
synced 2024-11-10 01:10:34 +00:00
135 lines
4.0 KiB
Lua
135 lines
4.0 KiB
Lua
--[[--
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Font module.
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]]
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local Freetype = require("ffi/freetype")
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local logger = require("logger")
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local Screen = require("device").screen
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local FontList = require("fontlist")
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local Font = {
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fontmap = {
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-- default font for menu contents
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cfont = "noto/NotoSans-Regular.ttf",
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-- default font for title
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--tfont = "NimbusSanL-BoldItal.cff",
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tfont = "noto/NotoSans-Bold.ttf",
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smalltfont = "noto/NotoSans-Bold.ttf",
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x_smalltfont = "noto/NotoSans-Bold.ttf",
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-- default font for footer
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ffont = "noto/NotoSans-Regular.ttf",
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smallffont = "noto/NotoSans-Regular.ttf",
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largeffont = "noto/NotoSans-Regular.ttf",
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-- default font for reading position info
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rifont = "noto/NotoSans-Regular.ttf",
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-- default font for pagination display
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pgfont = "noto/NotoSans-Regular.ttf",
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-- selectmenu: font for item shortcut
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scfont = "droid/DroidSansMono.ttf",
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-- help page: font for displaying keys
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hpkfont = "droid/DroidSansMono.ttf",
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-- font for displaying help messages
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hfont = "noto/NotoSans-Regular.ttf",
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-- font for displaying input content
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-- we have to use mono here for better distance controlling
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infont = "droid/DroidSansMono.ttf",
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-- small mono font for displaying code
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smallinfont = "droid/DroidSansMono.ttf",
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-- font for info messages
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infofont = "noto/NotoSans-Regular.ttf",
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-- small font for info messages
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smallinfofont = "noto/NotoSans-Regular.ttf",
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-- small bold font for info messages
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smallinfofontbold = "noto/NotoSans-Bold.ttf",
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-- extra small font for info messages
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x_smallinfofont = "noto/NotoSans-Regular.ttf",
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-- extra extra small font for info messages
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xx_smallinfofont = "noto/NotoSans-Regular.ttf",
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},
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sizemap = {
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cfont = 24,
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tfont = 26,
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smalltfont = 24,
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x_smalltfont = 22,
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ffont = 20,
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smallffont = 15,
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largeffont = 25,
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pgfont = 20,
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scfont = 20,
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rifont = 16,
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hpkfont = 20,
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hfont = 24,
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infont = 22,
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smallinfont = 16,
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infofont = 24,
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smallinfofont = 22,
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smallinfofontbold = 22,
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x_smallinfofont = 20,
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xx_smallinfofont = 18,
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},
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fallbacks = {
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[1] = "noto/NotoSans-Regular.ttf",
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[2] = "noto/NotoSansCJKsc-Regular.otf",
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[3] = "freefont/FreeSans.ttf",
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[4] = "freefont/FreeSerif.ttf",
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},
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-- face table
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faces = {},
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}
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--- Gets font face object.
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-- @string font
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-- @int size optional size
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-- @treturn table @{FontFaceObj}
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function Font:getFace(font, size)
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-- default to content font
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if not font then font = self.cfont end
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if not size then size = self.sizemap[font] end
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-- original size before scaling by screen DPI
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local orig_size = size
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size = Screen:scaleBySize(size)
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local hash = font..size
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local face_obj = self.faces[hash]
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-- build face if not found
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if not face_obj then
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local realname = self.fontmap[font]
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if not realname then
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realname = font
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end
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realname = FontList.fontdir.."/"..realname
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local ok, face = pcall(Freetype.newFace, realname, size)
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if not ok then
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logger.warn("#! Font ", font, " (", realname, ") not supported: ", face)
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return nil
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end
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--- Freetype font face wrapper object
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-- @table FontFaceObj
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-- @field orig_font font name requested
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-- @field size size of the font face (after scaled by screen size)
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-- @field orig_size raw size of the font face (before scale)
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-- @field ftface font face object from freetype
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-- @field hash hash key for this font face
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face_obj = {
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orig_font = font,
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size = size,
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orig_size = orig_size,
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ftface = face,
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hash = hash
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}
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self.faces[hash] = face_obj
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end
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return face_obj
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end
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return Font
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