mirror of
https://github.com/koreader/koreader.git
synced 2025-08-10 00:52:38 +00:00
25 lines
870 B
Lua
25 lines
870 B
Lua
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--[[
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"Global" LRU cache used by Document & friends.
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--]]
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local Cache = require("cache")
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local CanvasContext = require("document/canvascontext")
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local DataStorage = require("datastorage")
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local function calcCacheMemSize()
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local min = DGLOBAL_CACHE_SIZE_MINIMUM
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local max = DGLOBAL_CACHE_SIZE_MAXIMUM
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local calc = Cache:_calcFreeMem() * (DGLOBAL_CACHE_FREE_PROPORTION or 0)
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return math.min(max, math.max(min, calc))
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end
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local DocCache = Cache:new{
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size = calcCacheMemSize(),
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-- Average item size is a screen's worth of bitmap, mixed with a few much smaller tables (pgdim, pglinks, etc.), hence the / 3
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avg_itemsize = math.floor(CanvasContext:getWidth() * CanvasContext:getHeight() * (CanvasContext.is_color_rendering_enabled and 4 or 1) / 3),
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disk_cache = true,
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cache_path = DataStorage:getDataDir() .. "/cache/",
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}
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return DocCache
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